WO2006075862A1

WO2006075862A1 - Method of construction for stabilization of ground

Info

Publication number: WO2006075862A1
Application number: PCT/KR2006/000102
Authority: WO
Inventors: Sung Ryong Ko; Woo Hyun Ko
Original assignee: Sung Ryong Ko; Woo Hyun Ko
Priority date: 2005-01-12
Filing date: 2006-01-10
Publication date: 2006-07-20
Also published as: KR100689061B1; KR20060082544A; CN101103156A

Abstract

There is provided a ground hardening and stabilizing construction method. The ground hardening and stabilizing construction method which stabilizes by applying to ground a ground hardener completed by a first process of manufacturing a powder composition by mixing a silicon oxide (SiO), a steel oxide (Fe O ), a calcium oxide (CaO), an aluminum oxide (AL O ), a sulfuric acid (H 2 SO 4 ), a magnesium oxide (MgO), and a lignin sulphonate to cement as a rein- forcement filler for soil of clay, sand, dirt, organic; a second process of manufacturing a mixed soil stabilizing composition by mixing a stearicate, a sodium hydroxide (NaOH), a silica (SiO ), and a tripolyphosphate to the powder composition; a third process of manufacturing a ground hardener (GH agent) by mixing cement to the soil stabilizing composition, the method comprising: applying, mixing, paving, pressing, and cementing to a ground hardener of 1 to 15 wt% to a unit weight of the ground soil, when an object ground to be stabilized is general soil ground.

Description

METHOD OF CONSTRUCTION FOR STABILIZATION OF

GROUND

Technical Field

[1] The present invention relates to a ground hardening and stabilizing construction method, and more particularly, to a ground hardening and stabilizing construction method which can stabilize a ground depending on a characteristic of ground, i.e., a characteristic of each ground such as a general soil ground, a frail ground, and a living waste or industrial waste ground. Background Art

[2] ground should be well managed in a Korean peninsula in which three sides are surrounded with the sea and which has a small area. Accordingly, it is urgently required to efficiently use a land with a frail ground of a seashore and an inland or a living waste or industrial waste ground.

[3] ground has a different composition depending on a local characteristic, a climatic condition, a property of soil, etc. A frail ground among the grounds is ground of a state which can not support an upper construction and ground which is generally made of a frail clay, a fine grained soil of a silt, etc, an organic soil, etc. and shows an unstable mechanical state due to large compressibility and small supporting force and thus when an operation of filling or excavating soil is performed on ground, ground sinkage and destruction are generated, so that it is required to establish a countermeasure construction method.

[4] Further, a living waste or industrial waste ground is ground mixed with living wastes or industrial wastes left after being used by people.

[5] On the other hand, a ground modifying material or a solidifying material allowing to use by modifying a frail ground or a living waste or industrial waste ground, etc. is divided into two depending on a use. First is a solidifying material for stabilizing a frail ground such as a high organic soil and soil having a high moisture content and second is a solidifying material for stabilizing by solidifying industrial wastes made due to air pollution and water pollution.

[6] As a frail ground stabilizing material (solidifying material) using in local, a cement- based solidifying material is generally used. In the USA in the 1930s, as a soil quality stabilizing material, soil cement in which soil and normal cement are mixed started to use with a roadbed material as a soil stabilizing material, but it is less effective and uneconomic in a high organic soil, a clay, and soil having a high moisture content. In Japan where there are lots of frail ground in the 1960s, a lime-based soil quality stabilizing material is individually developed, but it has a defect such as a large hydration heat, treatment to a hazardous material, dust generation upon constructing and in the 1970s, a cement-based soil quality stabilizing material (cement-based solidifying material) is developed, used up to now, and various modified solidifying materials for stabilizing a soil quality are continuously developed.

[7] In order to aid to generate an ettringite using much water as coupling water and to proceed a gypsum or a pozzolan reaction, the cement-based solidifying material is devised, combined, and added to slag, coal ash, jet cement or alumina cement for improving a solidifying performance or jet cement, or special cement to which their components are adjusted depending on a use. However, it is also restricted to use the cement-based solidifying material which recently uses depending on a regional, environmental, and geological conditions. An environment effect depending on a component of a leachate is not sufficiently considered in a living waste or industrial waste landfill.

[8] Furthermore, in order to fix a heavy metal ion, a solidifying material in an environment industry uses a mechanism such as adsorption and solid solving, generation of a poor solubility compound, and substitution fixation of a heavy metal. For this reason, a lime-based material such as a quicklime or a slacked lime, a calcium sulfo- aluminate-based (CSA) material for generating the ettringite, and a sub material such as a gypsum, a slag, a coal ash are used.

[9] A frail ground is not much distributed in our country. However, recently, comprehensive land development is required due to a progress of an industry, increase in a population, and expansion of an economy scale. Development of a soil quality stabilizing material for using in a relatively poor region requiring waste reclamation and sludge solidifying in water supply and drainage and drainage terminal treatment as an environmental-friendly business as well as national land development such as a reclamation project due to a marine nation in which three sides are surrounded with the sea and new airport development is unavoidably required.

[10] However, the above-mentioned conventional soil quality stabilizing material is seldom waterproof and has no stability of construction due to poor mixing of soil particles and there is a freezing injury in a winter season due to an effect of a temperature and thus it has a small defect.

[11] Furthermore, in order to stabilize ground in a ground stabilizing construction, for example, a road construction, a construction is performed by using aggregate picked from a nature. As water permeates from the outside into the ground upon using of such aggregate, a strength of ground is deteriorated and thus ground becomes frail, so that there is a problem that durability of ground is deteriorated and a natural landscape is damaged due to picking of nature aggregate. [12] Furthermore, when a construction material such as aggregate is carried from a long distance, there is a problem that the construction cost rises.

[13] Therefore, the present inventor develops a ground hardening and stabilizing construction method which can apply in a living waste or industrial waste ground as well as a frail ground and is already received Korean patent registration No. 24031 titled in "a ground hardening and stabilizing construction method (filed on December 29, 1984)". In patent registration No. 24031, disclosed is a ground hardening and stabilizing construction method using a powder composition consisting of an a silicon oxide (SiO) of 14 to 16%, a steel oxide (Fe 2 O 2 ) of 5 to 6%, a calcium oxide (CaO) of

51 to 53%, an aluminum oxide (AL O ) of 10 to 11%, a sulfuric acid (H SO ) of 5 to 6%, a magnesium oxide (MgO) of 5 to 6%, and a lignin sulphonate of 1.0 to 1.6% to cement as a reinforcement filler for soil of clay, sand, dirt, organic, the method comprising mixing, pressing, and solidifying to soil to process after mixing a soil stabilizing composition of 3 to 5% (based on a cement weight) in which a stearicate of 0.5 to 1.2%, a sodium hydroxide (NaOH) of 0.4 to 1.1%, a silica (SiO ) of 1.1 to 2.4%, and a tripolyphosphate are further added to the composition to cement and adjusting a moisture percent of soil.

[14] In Korean patent registration No. 24031, a composition which can stabilize by hardening ground is provided and ground can be stabilized by using a composition. However, it is required to stabilize ground depending on a characteristic of each ground by applying to various soil qualities through adjusting a content of the above mentioned composition depending on a characteristic of each ground, i.e., general soil ground, a frail ground, or a living waste or industrial waste ground, etc. Disclosure of Invention Technical Problem

[15] Accordingly, an object of the present invention is to solve at least the problems and disadvantages of the background art.

[16] An object of the present invention is to provide a ground hardening and stabilizing construction method which can obtain a speedy and improved ground stabilization and compose stable ground having a large compression strength and little freezing injure by driving a cohesive force of soil in a short time.

[17] Another purpose of the present invention is to provide a ground hardening and stabilizing construction method which can have an excellent ground hardening effect in frail ground of fine grain, silt, organic, clay, and dirt and unstable ground such as living waste ground or industrial waste ground and perform an environment-friendly and economical construction.

Technical Solution [18] According to an aspect of the present invention, there is provided a ground hardening and stabilizing construction method which stabilizes by applying to ground a ground hardner completed by a first process of manufacturing a powder composition by mixing a silicon oxide (SiO), a steel oixde (Fe O ), a calcium oxide (CaO), an aluminum oxide (AL O ), a sulfuric acid (H SO ), a magnesium oxide (MgO), and a lignin sulphonate to cement as a reinforcement filler for soil of clay, sand, dirt, organic; a second process of manufacturing mixed soil stabilizing composition by mixing a stearicate, a sodium hydroxide (NaOH), a silica (SiO ), and a tripolyphosphate to the powder composition; a third process of manufacturing a ground hardner (GH agent) by mixing cement to the soil stabilizing composition, the method comprising: applying, mixing, paving, pressing, and cementing to a ground hardner of 1 to 15 wt% to an unit weight of the ground soil, when object ground to be stabilized is general soil ground.

[19] A moisture content of soil for manufacturing the mixed soil may be kept to 13 to

15%.

[20] According to another aspect of the present invention, there is provided a ground hardening and stabilizing construction method which stabilizes by applying to ground a ground hardner completed by a first process of manufacturing a powder composition by mixing a silicon oxide (SiO), a steel oxide (Fe O ), a calcium oxide (CaO), an aluminum oxide (AL O ), a sulfuric acid (H SO ), a magnesium oxide (MgO), and a lignin sulphonate to cement as a reinforcement filler for soil of clay, sand, dirt, organic; a second process of manufacturing a mixed soil stabilizing composition by mixing a stearicate, a sodium hydroxide (NaOH), a silica (SiO ), and a tripolyphosphate to the powder composition; a third process of manufacturing a ground hardner (GH agent) by mixing cement to the soil stabilizing composition, the method comprising: mixing, paving, pressing, and cementing to 3 to 25 wt% of a ground hardner to an unit weight of the ground soil, when an object ground to be stabilized is frail ground.

[21] According to still another aspect of the present invention, there is provided a ground hardening and stabilizing construction method which stabilizes by applying to ground a ground hardner completed by a first process of manufacturing a powder composition by mixing a silicon oxide (SiO), a steel oxide (Fe O ), a calcium oxide (CaO), an aluminum oxide (AL O ), a sulfuric acid (H SO ), a magnesium oxide (MgO), and a lignin sulphonate to cement as a reinforcement filler for soil of clay, sand, dirt, organic; a second process of manufacturing a mixed soil stabilizing composition by mixing a stearicate, a sodium hydroxide (NaOH), a silica (SiO ), and a tripolyphosphate to the powder composition; a third process of manufacturing a ground hardner (GH agent) by mixing cement to the soil stabilizing composition, the method comprising: mixing, paving, pressing, and cementing to a ground hardner of 3 to 20 wt% to an unit weight of the ground soil, when an object ground to be stabilized is living waste or industrial waste ground. [22] A moisture content of the manufacturing soil mixed with living wastes or industrial waste may be kept to 12 to 16%. [23] Soil and sand mixed with the living wastes or industrial waste may be 30 to 50 wt% of the living wastes or industrial waste, at a manufacturing step of the mixed soil.

Advantageous Effects [24] As described above, according to a ground hardening and stabilizing construction method of the present invention, as a cohesive force of soil is rapidly raised within a short time, a compression strength is large and there is rarely a freezing injury in a winter season, so that it is possible to make up stable ground by preventing imbalance sinking and flood of a roadbed as a rigid plate becomes. [25] Furthermore, it is possible to construct by applying in various soils of frail ground of fine grane, silt, organic, clay, and dirt or unstable ground such as living waste ground or industrial waste ground and it is possible to construct using soil of a construction site depending on a situation of a construction site [26] On the other hand, an economical, environment-friendly, and stabilized ground due to reduction of the construction cost can satisfy a ground support force and durability, etc. requiring in a construction site, so that it is possible to supply a construction method suitable in reinforcing ground.

Brief Description of the Drawings [27] The invention will be described in detail with reference to the following drawings in which like numerals refer to like elements. [28] FIG. 1 is a flowchart illustrating a ground hardening construction of a small size of general soil ground according to the present invention; [29] FIG. 2 is a flowchart illustrating a ground hardening construction of a large size of general soil ground according to the present invention; [30] FIG. 3 is a flowchart illustrating a ground hardening construction of a frail ground according to the present invention; [31] FIG. 4 is a flowchart illustrating a ground hardening construction of living wastes or industrial waste ground according to the present invention; and [32] FIG. 5 is a diagram illustrating a simplified construction state upon ground hardening constructing of living waste or industrial waste ground with a ground hardening and stabilizing construction method according to the present invention.

Best Mode for Carrying Out the Invention [33] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings are given not for limiting the present invention but for an illustration.

[34] As disclosed in Korean patent No. 24031 which is applied and registered by the present inventor, a ground hardner (GH agent) made by mixing a soil stabilizing composition which further adds a stearicate of 0.5 to 1.2%, a sodium hydroxide (NaOH) of 0.4 to 1.1%, a silica (SiO), and a tripolyphosphate of 1.1 to 2.4% to a compositin to cement depending on a combination percent (3 to 5%) is used in a ground hardening and stabilizing construction method which uses a power composition consisting of a silicon oxide (SiO) of 14 to 16%, a steel oxide (Fe 2 O 2 ) of 5 to 6%, a calcium oxide (CaO) of 51 to 53%, an aluminum oxide (AL O ) of 10 to 11%, a sulfuric acid (H SO ) of 5 to 6%, a magnesium oxide (MgO) of 5 to 6%, and a lignin sulphonate of 1 to 1.6% to cement as a reinforcement filler for soil of clay, sand, dirt, organic. Therefore, it is possible to perform a ground hardening construction suitable to a characteristic of each ground such as general soil ground, frail ground, and living waste or industrial waste ground depending on a combination ratio of the ground hardner.

[35] First, a ground hardening and stabilizing construction method of using in general soil ground among a ground hardening and stabilizing construction method of according to the present invention will be described. Specifically, it is economical to construct when constructing a samll size in a place to construct upon hardening of ground in general soil ground.

[36] FIG. 1 is a flowchart illustrating a ground hardening construction of a small size of general soil ground according to the present invention.

[37] Referring to FIG. 1, a present ground soil of a place for a ground hardening construction is dug to a predetermined thickness (SlOO). Thereafter, earth and sand which are dug with a stabilizer, etc. are crushed (Sl 10) and a ground hardener (GH agent) made by adding the soil stabilizing composition using in the present invention to cement depending on a combination ratio is paved to the crushed earth and sand (S 120). Here, a ground hardener using in a general soil ground is added to 1 to 15 wt% of an unit weight of ground soil. Next, an operation which crushes and mixes cement comprising earth and sand and the ground hardener, i.e., the soil stabilizing composition is performed with a stabilizer, etc. and the soil mixed in this way performs a mixing operation while keeping a proper moisture percent (S 130). It is preferable that a moisture percent of the mixed soil keeps 13 to 15% so that a soil stabilizing composition further stabilizes ground. After the mixed soil is paved and arranged in a proper depth with a paving equipment (S 140), a ground hardening and stabilizing operation is finished by solidifying (S 150) while stabilizing a surface layer by sufficiently pressing soil in which a ground hardener is paved with a pressing equipment. [38] FlG. 2 is a flowchart illustrating a ground hardening construction of a large size of general soil ground according to the present invention.

[39] When a place to perform a ground hardening and stabilizing construction is general soil ground and a construction is performed in a large size, it is economical to previously manufacture mixed soil comprising a ground hardener.

[40] As shown in FlG. 2, a plant for mixing soil and a ground hardener picked in a selected place after previously selecting a place which can pick a good quality of soil is provided (S200). A mixed soil is made by putting a ground hardener with a predetermined combination ratio in soil picked using the plant provided thus (S210) and the soil is carried (S220) and paved (S230) to a place for performing a ground hardening and stabilizing construction. At this time, it is preferable that the moisture percent of the mixed soil keeps 13 to 15% as in a ground hardening and stabilizing construction of a small scale of general soil and a ground hardener is added with 1 to 15 wt% of an unit weight of ground soil. In addition, it is preferable that a mixed soil for paving uses a FHISHER equipment to pave in a uniform thickness. The ground surface is stabilized and solidified by pressing a place where the mixed soil is paved with a pressing equipment, etc. (S240).

[41] FIG. 3 is a flowchart illustrating a ground hardening construction of a frail ground according to the present invention.

[42] Referring to FIG. 3, in a case where ground to modify with a ground hardening and stabilizing construction is frail ground, a depth to modify a frail ground, i.e., a distance from the earth surface to a depth to modify is calculated and set with a method such as a depth calculation equation, for example, a BOUSSINSSQ equation (a modified depth calculation equation from the earth surface)(S300). The ground hardener is putted to a frail ground depending on a combination ratio suitable to a frail ground to modify (S310) and the mixed soil is prepared by mixing the ground hardener (S320) and then solidified. A rigid plate having a predetermined thickness is made on a frail ground by manufacturing a rigid line plate in a predetermined thickness. The rigid plate is floated on the frail ground and a ground hardening and stabilizing construction can be performed a rigid plate support method of supporting an upper load of the rigid plate with a rigid plate. Here, a ground hardener is added to 3 to 25 wt% of a unit weight of ground soil. It is preferable that a step (S330) of paving and pressing a mixed soil is further comprised next to a step (S320) of manufacturing a mixed soil as shown in FIG. 2.

[43] FIG. 4 is a flowchart illustrating a ground hardening construction of living waste or industrial waste ground according to the present invention.

[44] As shown in FlG. 4, in a case of a ground hardening construction of living waste or industrial waste ground, after digging a portion to modify of the living waste or industrial waste ground (S400), dug living wastes or industrial waste and earth and sand (30 to 50% of garbage or waste wt%) of the predetermined amount are mixed (S410). This is because it is difficult to perform a ground hardening construction with only garbage or waste. Thereafter, a ground hardener is put to have a proper combination ratio to the mixed soil (S420). The mixed soil in which a ground hardener and a mixed soil are again mixed (S430) is recalimed and paved in a dug place in a predetermined depth (S440) and ground is stabilized by sufficiently pressing and solidifying (S450) ground with a pressing equipment, so that a ground hardening and stabilizing construction is finished. Accordingly, ground in which a construction is completed changes with a hardened ground of a rigid palte having strong durability and thus a leachate is not generated and a stench is not generated, so that it is possible to previously prevent environmental pollution.

[45] Here, it is preferable that a moisture percent of the mixed soil is kept to 12 to 16%. a ground hardener is added to 3 to 20 wt% of a unit weight of ground soil in a hardening construction of a living waste or industrial waste ground.

[46] Hereinafter, an effect of the present invention will be described in detail through embodiments.

[47] FlG. 5 is a diagram illustrating a simplified construction state upon ground hardening constructing of living waste or industrial waste ground with a ground hardening and stabilizing construction method according to the present invention. Here, an embodiment in which a ground hardening and stabilizing construction is performed for the living waste or industrial waste ground will be described.

[48] <Embodiment>

[49] The earth and sand used in here are is a clay sand (SP-SM) in which a silt is mixed and soil mixed with cloth, vinyl, plastic, etc. is used in living wastesa as a garbage.

[50] A test for the earth and sand is shown in Table 1.

[51] Table 1

[52] A specimen is manufactured by mixing with living waste soil and earth and sand and a ground hardener (GH agent) which are reclaimed and mixed with an optimum moisture percent 13.3% by a pressing test A of Table 1 and made by pressing 25 times for each floor by a pressing rammer with a weight of 5Kg and a height of 30D and is manufactured by a natural dry curing (temperature of 20+2°C) with a three floor structure.

[53] As shown in FlG. 5, a living waste ground for a ground hardening and stabilizing construction is dug with a depth of 2m and an operation space is divided into three floors (7OD, 7OD, 6OD from a lower end) and an operation is performed. Here, to dig ground with a depth of 2m and to divide an operation space into floors of a specific height are just one example. In other words, in the embodiment, it is assumed that a living waste ground is in a depth of 2m from a surface floor. If a depth of a living waste ground is positioned to be larger or smaller than the depth, a depth to dig is added or subtracted depending on the height and a depth which divides a working space into each floor can also be changed with a working situation, etc.

[54] The mixing operation is performed by putting a ground hardener of 90.12Kg/m³ per filing soil of 1.0m and performed together with adjustment of a moisture percent of soil. Here, a put amount of a ground hardener is determined by calculating soil per a weight unit area.

[55] A mixed soil which is sufficiently mixed is reclaimed, paved, and pressed in a dug soil with a predetermined depth and the operation is performed in the order with divided in each section as shown in the figure.

[56] Here, after an operation of section 1 or 2, an operation is not performed in the top portion thereof and an operation of section 3 performs in one side of section 1 and it is assumed that an operation space dominates a somewhat wide area, and an operation which reclaims and paves a ground surface, i.e., a surface layer of the earth is performed after a lower layer operation of a operation space is finished (section 5 or 6).

[57] In this way, when an operation space is large, a lower layer operation of an operation space is first finished and when an operation space is small, an operation which reclaims and paves a surface layer can be performed in the top portion of section 2 after an operation of section 2 shown in FlG. 1 is finished.

[58] A test result depending on each sample is shown in Table 2.

[59] According to ground hardening and stabilizing construction method of the present invention, a roadbed support force is improved and stability is kept with condensing due to a hydration with a ground hardener which is mixed with a soil stabilizing composition and cement and a moisture comprised in soil in soil. As a living waste soil which is reclaimed and mixed, the delivered earth and sand, and a ground hardener are mixed and tested with a fixed ratio, the mixed soil can have a stable value about three times greater than a reference strength of 5Kg/cm (roadbed support force of 20Kg/cm ) and a stable ground support force can be obtained due to adjustment of a proper moisture percent of ground and sufficient mixing of a ground hardener and earth and sand, and pressing operation upon constructing.

[60] Table 2

[61] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Claims

[1] A ground hardening and stabilizing construction method which stabilizes by applying to ground a ground hardener completed by a first process of manufacturing a powder composition by mixing a silicon oxide (SiO), a steel oxide (Fe O ), a calcium oxide (CaO), an aluminum oxide (AL O ), a sulfuric acid (H SO ), a magnesium oxide (MgO), and a lignin sulphonate to cement as a reinforcement filler for soil of clay, sand, dirt, organic; a second process of manufacturing a mixed soil stabilizing composition by mixing a stearicate, a sodium hydroxide (NaOH), a silica (SiO ), and a tripolyphosphate to the powder composition; a third process of manufacturing a ground hardener (GH agent) by mixing cement to the soil stabilizing composition, the method comprising: applying, mixing, paving, pressing, and cementing to a ground hardener of 1 to 15 wt% to a unit weight of the ground soil, when an object ground to be stabilized is general soil ground.

[2] The ground hardening and stabilizing construction method of claim 1, wherein a moisture content of soil for manufacturing the mixed soil is kept to 13 to 15%.

[3] A ground hardening and stabilizing construction method which stabilizes by applying to ground a ground hardener completed by a first process of manufacturing a powder composition by mixing a silicon oxide (SiO), a steel oxide (Fe O ), a calcium oxide (CaO), an aluminum oxide (AL O ), a sulfuric acid (H SO ), a magnesium oxide (MgO), and a lignin sulphonate to cement as a reinforcement filler for soil of clay, sand, dirt, organic; a second process of manufacturing a mixed soil stabilizing composition by mixing a stearicate, a sodium hydroxide (NaOH), a silica (SiO ), and a tripolyphosphate to the powder composition; a third process of manufacturing a ground hardener (GH agent) by mixing cement to the soil stabilizing composition, the method comprising: applying, mixing, paving, pressing, and cementing to a ground hardener of 3 to 25 wt% to a unit weight of the ground soil, when an object ground to be stabilized is frail ground.

[4] A ground hardening and stabilizing construction method which stabilizes by applying to ground a ground hardener completed by a first process of manufacturing a powder composition by mixing a silicon oxide (SiO), a steel oxide (Fe O ), a calcium oxide (CaO), an aluminum oxide (AL O ),

2 2 2 3 a sulfuric acid (H SO ), a magnesium oxide (MgO), and a lignin sulphonate to cement as a reinforcement filler for soil of clay, sand, dirt, organic; a second process of manufacturing a mixed soil stabilizing composition by mixing a stearicate, a sodium hydroxide (NaOH), a silica (SiO ), and a tripolyphosphate to the powder composition; a third process of manufacturing a ground hardener (GH agent) by mixing cement to the soil stabilizing composition, the method comprising: applying, mixing, paving, pressing, and cementing to a ground hardener of 3 to 20 wt% to an unit weight of the ground soil, when an object ground to be stabilized is living waste or industrial waste ground.

[5] The ground hardening and stabilizing construction method of claim 4, wherein a moisture content of the manufacturing soil mixed with living wastes or industrial wastes is kept to 12 to 16%.

[6] The ground hardening and stabilizing construction method of claim 4 or 5, wherein soil and sand mixed with the living wastes or industrial wastes are 30 to 50 wt% of the living wastes or industrial waste, at a step of manufacturing the mixed soil.