CN112502131A - Environment-friendly land making method for reinforcing engineering muck and soft soil foundation in layered mode - Google Patents
Environment-friendly land making method for reinforcing engineering muck and soft soil foundation in layered mode Download PDFInfo
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- CN112502131A CN112502131A CN202011527086.5A CN202011527086A CN112502131A CN 112502131 A CN112502131 A CN 112502131A CN 202011527086 A CN202011527086 A CN 202011527086A CN 112502131 A CN112502131 A CN 112502131A
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- 239000002689 soil Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 34
- 239000010410 layer Substances 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 39
- 230000002787 reinforcement Effects 0.000 claims description 31
- 238000010276 construction Methods 0.000 claims description 30
- 238000012216 screening Methods 0.000 claims description 19
- 239000012744 reinforcing agent Substances 0.000 claims description 17
- 239000002699 waste material Substances 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 8
- 238000010009 beating Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- 239000002956 ash Substances 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 4
- 239000004137 magnesium phosphate Substances 0.000 claims description 4
- 229960002261 magnesium phosphate Drugs 0.000 claims description 4
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims description 4
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 4
- 239000003415 peat Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 2
- 238000007596 consolidation process Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses an environment-friendly land reclamation method for reinforcing engineering muck and soft soil foundation in a layered manner. According to the method, the integral curing material on the surface soil body is cured to form the integral surface curing layer, the soil body can be pressed down in an integral plate shape in the later period of vacuum preloading treatment, the sealing performance and the pressure born by the lower vacuum preloading area are improved, the moisture in the curing area of the curing material is favorably discharged downwards through the pumping system, and the vacuum preloading pumping effect is improved. Because the pressure of the soil body is gradually reduced from top to bottom to the depth of the soil body after bearing the pressure, the reinforcing method can form a whole reinforcing layer with large bearing capacity on the surface layer, the whole reinforcing layer can disperse the pressure to a larger area, the sinking range is reduced, and the multi-composite bearing capacity can be obtained by matching with the vacuum preloading drainage area below.
Description
Technical Field
The invention belongs to a method for recycling engineering muck resources, and particularly relates to an environment-friendly land making method for reinforcing engineering muck and a soft soil foundation layer by layer.
Background
In the process of developing urban underground space in a soft soil area, a large amount of engineering muck is inevitably generated, the muck has the characteristics of high water content, large porosity and the like, in addition, the structural strength is basically damaged due to the mechanical disturbance influence in the excavation process, the muck is generally discarded in the field as waste, and because the volume is large, a large amount of land resources are required to be occupied, so that the resource waste is caused, and the pollution is also generated to the local environment. On the other hand, the reclamation manner of land by blowing is prohibited due to the disadvantage of environmental protection, and the land resources reserved in many cities are continuously reduced, so that the urban construction faces the dilemma of 'no land available' and the land reclamation project faces the 'no land available'. The engineering muck is derived from foundation soil, so that the engineering muck is combined with urban land reclamation, the ideal way of simultaneously solving the problems of 'no-place discharge' of large-volume engineering muck and 'no soil availability' of land reclamation engineering is provided, the engineering property of the engineering muck needs to be improved, the common reinforcing modes of the engineering muck are a vacuum preloading method, a chemical curing method and the like, but the conventional vacuum preloading drainage consolidation method has limited improvement of the bearing capacity of a soil body, and a land unit needs to carry out secondary reinforcement on surface soil, so that the construction period is prolonged and the cost is increased; if the chemical reinforcement method is directly adopted, the treatment cost is too high, and in addition, the deep soil body reinforcement construction efficiency is low, the technology is complex, and the quality is unstable.
Disclosure of Invention
The invention aims to solve the technical problem of providing an environment-friendly land reclamation method for reinforcing engineering muck and soft soil foundations in a layered mode, and the method can form a composite soil body with high bearing capacity through surface layer integral curing and lower layer vacuum preloading curing.
Therefore, the environment-friendly land making method for reinforcing the engineering slag soil and the soft soil foundation in a layering manner, provided by the invention, comprises the following steps of: and carrying out vacuum preloading reinforcement treatment on the engineering muck, and carrying out shallow reinforcement construction on the surface layer of the engineering muck by adopting a reinforcing agent.
Preferably, the specific construction steps include:
(1) leveling the engineering muck foundation field, and then every 500-1000 m2Taking a group of soil samples, and carrying out geotechnical physical and mechanical index tests;
(2) determining construction parameters of a deep and shallow layer reinforced area according to various indexes of engineering muck and a foundation and by combining design requirements;
(3) stirring the engineering muck and the reinforcing agent uniformly by using stirring equipment for more than 1 time;
(4) leveling the stirred residue soil by using an excavator and rolling and compacting;
(5) vertically inserting and beating the drainage plates, wherein the horizontal spacing of the drainage plates is 700-1000 mm, and the depth of the drainage plates exceeds the total thickness of the engineering muck;
(6) laying woven cloth, a horizontal drainage pipe, geotextile and a sealing film, and erecting to form a vacuum prepressing system;
(7) starting a vacuum pump, and monitoring the vacuum degree, the sedimentation amount and the pore water pressure value in real time;
(8) and after the stability requirement is met, the vacuum system is released, and various detections are carried out according to the design requirement.
Preferably, the specific construction steps include:
(1) leveling engineering muck, vertically inserting and beating drainage plates, wherein the distance between every two drainage plates is 700-1000 mm, and the depth of each drainage plate exceeds the thickness of the engineering muck;
(2) laying woven cloth, a horizontal drainage pipe, geotextile and a sealing film, and erecting to form a vacuum prepressing system;
(3) starting a vacuum pump, and monitoring the vacuum degree, the sedimentation amount and the excess pore water pressure value in real time;
(4) relieving the vacuum system after the stability requirement is met;
(5) according to the thickness of 500-1000 mm2And taking a group of soil samples, and carrying out geotechnical index testing. According to the design elevation requirement, not only can raw soil be selected, but also engineering muck can be selected to be used as a shallow layer reinforced area;
(6) determining construction parameters of a deep and shallow layer reinforced area according to various indexes of engineering muck and a foundation and by combining design requirements;
(7) stirring the engineering muck and the reinforcing agent uniformly by using stirring equipment, wherein the stirring is generally carried out for more than 1 time;
(8) leveling and rolling the stirred residue soil tightly by using an excavator;
(9) and carrying out in-situ detection according to design requirements after maintenance.
Preferably, the shallow reinforcing area is reinforced by adopting multiple layers, the shallow reinforcing area comprises a strong reinforcing layer and a weak reinforcing layer, the weak reinforcing layer is constructed firstly, the strong reinforcing layer is constructed secondly, more reinforcing agents are added into the strong reinforcing layer than the weak reinforcing layer, and the construction waste is mixed into the shallow reinforcing area.
Preferably, the reinforcing agent comprises a main agent and an auxiliary agent, wherein the main agent comprises quick lime and/or cement, and the auxiliary agent comprises fly ash and/or activated ash MgO and/or metakaolin and/or magnesium phosphate and/or sodium silicate.
Preferably, the stirring equipment is an excavator serving as a power source and is provided with a double-wheel stirring head and a screening hopper.
Preferably, the engineering muck comprises silt, slurry, plain filling soil, construction waste and peat soil.
The invention has the technical effects that:
the reinforced foundation is a vertical composite foundation combining a super-consolidation surface layer hard shell layer and a consolidation lower lying layer, and the bearing capacity can be greatly improved.
(2) The waste engineering muck is utilized for backfilling and land making, so that the waste recycling is realized, the environment is protected, the situation of urban land shortage is relieved, and meanwhile, the construction waste and the engineering muck can be combined for treatment, so that the bearing capacity is improved, the compression amount is reduced, and the construction waste can be subjected to harmless comprehensive utilization treatment.
(3) The shallow layer reinforcing process replaces the traditional deep layer stirring process, greatly improves the construction efficiency, reduces the construction difficulty and simultaneously improves the bearing capacity of the soil body.
(4) The layered reinforcing process can reduce the consumption of the reinforcing agent and improve the uniformity of the stirred soil of each layer.
(5) Shallow layer reinforcement can improve soil body intensity fast, forms the crust layer of high strength, and deep layer reinforcement can improve shallow layer soil body bearing capacity and reduce the total settlement volume.
(6) The layered reinforcement process can treat the soft soil foundation of the engineering muck on a large scale at one time, and simultaneously reduce the treatment cost.
Drawings
Fig. 1 is a schematic cross-sectional view of an environment-friendly land making method for reinforcing engineering slag and soft soil foundation in layers according to embodiment 1 of the present invention.
Fig. 2 is a flow chart of the process of fig. 1.
Fig. 3 is a schematic cross-sectional view of a reverse method of an environment-friendly land making method for reinforcing engineering slag and soft soil foundation in layers according to embodiment 2 of the present invention.
Fig. 4 is a process flow diagram of the reverse process of fig. 3.
Fig. 5 is a schematic structural section of a sieve hopper of a stirring device, wherein the sieve hopper is positively rotated.
Fig. 6 is a schematic cross-sectional structural view of a sieve hopper of a stirring apparatus, wherein the sieve hopper is inverted.
Fig. 7 is a schematic structural view of a screening hopper of the stirring device, wherein the structural plane with a screening roller shaft is schematic.
Fig. 8 is a schematic plan view of the construction of the screening roller shaft.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 3 and 4, an environment-friendly land reclamation method for reinforcing engineering slag soil and soft soil foundation in layers provided in embodiment 1 of the present invention includes the following steps: and carrying out vacuum preloading reinforcement treatment on the engineering muck, and carrying out shallow reinforcement construction on the surface layer of the engineering muck by adopting a reinforcing agent.
The concrete construction steps comprise:
(1) leveling the engineering muck foundation field, and then every 500-1000 m2Taking a group of soil samples, and carrying out geotechnical physical and mechanical index tests;
(2) determining construction parameters of a deep and shallow layer reinforced area according to various indexes of engineering muck and a foundation and by combining design requirements;
(3) stirring the engineering muck and the reinforcing agent uniformly by using stirring equipment, wherein the stirring equipment is used as a power source of an excavator and is provided with a double-wheel stirring head and a screening hopper, and stirring is carried out for 2-3 times before the previous time;
(4) leveling the stirred residue soil by using an excavator and rolling and compacting;
(5) vertically inserting and beating the drainage plates 7, wherein the horizontal spacing of the drainage plates is 700-1000 mm, and the depth of the drainage plates exceeds the total thickness of the engineering residue soil;
(6) laying woven cloth, a horizontal drainage pipe, geotextile and a sealing film 9, and erecting to form a vacuum prepressing system;
(7) starting a vacuum pump, and monitoring the vacuum degree, the sedimentation amount and the pore water pressure value in real time;
(8) and after the stability requirement is met, the vacuum system is released, and various detections are carried out according to the design requirement.
Referring to fig. 1 and 3, the shallow reinforcing area 8 is reinforced by multiple layers, including a strong reinforcing layer 81 and a weak reinforcing layer 82, the weak reinforcing layer 82 is constructed firstly, the strong reinforcing layer 81 is constructed secondly, more reinforcing agents are added into the strong reinforcing layer 81 than the weak reinforcing layer 82, and the construction waste is doped into the shallow reinforcing area 8.
The reinforcing agent comprises a main agent and an auxiliary agent, wherein the main agent comprises quick lime and/or cement, and the auxiliary agent comprises fly ash and/or activated ash MgO and/or metakaolin and/or magnesium phosphate and/or sodium silicate. The engineering muck comprises silt, slurry, plain filling soil, construction waste and peat soil.
The stirring equipment is a crawler traveling type excavating stirrer, before stirring, a reinforced road surface which can be used for the crawler traveling type excavating stirrer to travel is solidified around the periphery of a working area, the crawler traveling type excavating stirrer gradually stirs and solidifies around the working area to travel to the center of the working area, and the soil turning and stirring operation is carried out for three times.
In order to carry out foundation reinforcement in a more targeted manner, before material paving and stirring, the operation area is subjected to zone scribing according to the purposes, soil quality and water content of each area, and curing materials with different proportions and/or use amounts and/or types are paved on different areas formed by scribing, so that the area with high bearing capacity requirement can be reinforced on the premise of saving cost as much as possible.
Referring to fig. 1 and 2, the specific construction steps of embodiment 2 of the present invention include:
(1) leveling engineering muck, vertically inserting and beating water draining plates 7, wherein the distance between every two water draining plates 7 is 700-1000 mm, and the depth exceeds the thickness of the engineering muck;
(2) laying woven cloth, a horizontal drainage pipe, geotextile and a sealing film 9, and erecting to form a vacuum prepressing system;
(3) starting a vacuum pump, and monitoring the vacuum degree, the sedimentation amount and the excess pore water pressure value in real time;
(4) relieving the vacuum system after the stability requirement is met;
(5) according to the thickness of 500-1000 mm2And taking a group of soil samples, and carrying out geotechnical index testing. According to the design elevation requirement, not only can raw soil be selected, but also engineering muck can be selected to be used as a shallow layer reinforced area;
(6) determining construction parameters of a deep and shallow layer reinforced area according to various indexes of engineering muck and a foundation and by combining design requirements;
(7) stirring the engineering muck and the reinforcing agent uniformly by using stirring equipment, wherein the stirring is generally carried out for 2-3 times;
(8) leveling and rolling the stirred residue soil tightly by using an excavator;
(9) and carrying out in-situ detection according to design requirements after 28 days of maintenance period.
In the above example 2, the crushed building demolition waste is added to the shallow consolidation zone 8 and stirred together with other materials, the particle size of the demolition waste is 5-50 mm, and the usage amount is 5-15% of the total amount. The building demolition waste plays a role of aggregate and can reduce settlement, and the building waste refers to demolition of main building walls, columns and the like.
Referring to fig. 5-8, the stirring apparatus in embodiment 2 includes a crawler carrier and a screening hopper, the crawler carrier includes a crawler body and a mechanical arm, the screening hopper 1 is hinged to a tail end of the mechanical arm, the screening hopper 1 includes an upper opening 2 and a lower opening 3, a plurality of sets of screening rollers 4 are transversely installed in the screening hopper 1 near the lower opening, the screening rollers 4 are provided with a plurality of sets of screening knife boards 5, two ends of the screening rollers 4 are installed on two side walls of the screening hopper 1, only a gap is left between adjacent screening rollers 4, each set of screening hoppers are driven by a gear transmission mechanism 6 engaged with each other, the gear transmission mechanism is driven by a motor arranged on the carrier, and each gear in the gear transmission mechanism is coaxial with the screening rollers 4.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (13)
1. An environment-friendly land making method for reinforcing engineering slag soil and soft soil foundations in a layered manner is characterized by comprising the following steps: and carrying out vacuum preloading reinforcement treatment on the engineering muck, and carrying out shallow reinforcement construction on the surface layer of the engineering muck by adopting a reinforcing agent.
2. The environment-friendly land reclamation method for the layered reinforcement of the engineering muck and the soft soil foundation according to claim 1, which is characterized by comprising the following specific construction steps of:
(1) leveling the engineering muck foundation field, and then every 500-1000 m2Taking a group of soil samples, and carrying out geotechnical physical and mechanical index tests;
(2) determining construction parameters of a deep and shallow layer reinforced area according to various indexes of engineering muck and a foundation and by combining design requirements;
(3) stirring the engineering muck and the reinforcing agent uniformly by using stirring equipment for more than 1 time;
(4) leveling the stirred residue soil by using an excavator and rolling and compacting;
(5) vertically inserting and beating the drainage plates, wherein the horizontal spacing of the drainage plates is 700-1000 mm, and the depth of the drainage plates exceeds the total thickness of the engineering muck;
(6) laying woven cloth, a horizontal drainage pipe, geotextile and a sealing film, and erecting to form a vacuum prepressing system;
(7) starting a vacuum pump, and monitoring the vacuum degree, the sedimentation amount and the pore water pressure value in real time;
(8) and after the stability requirement is met, the vacuum system is released, and various detections are carried out according to the design requirement.
3. The environment-friendly land reclamation method for the layered reinforcement of the engineering muck and the soft soil foundation according to claim 1, which is characterized by comprising the following specific construction steps of:
(1) leveling engineering muck, vertically inserting and beating drainage plates, wherein the distance between every two drainage plates is 700-1000 mm, and the depth of each drainage plate exceeds the thickness of the engineering muck;
(2) laying woven cloth, a horizontal drainage pipe, geotextile and a sealing film, and erecting to form a vacuum prepressing system;
(3) starting a vacuum pump, and monitoring the vacuum degree, the sedimentation amount and the excess pore water pressure value in real time;
(4) relieving the vacuum system after the stability requirement is met;
(5) according to the thickness of 500-1000 mm2Taking a group of soil samples, carrying out geomechanics index test, and selecting original soil or engineering muck as a shallow reinforcing area according to the design elevation requirement;
(6) determining construction parameters of a deep and shallow layer reinforced area according to various indexes of engineering muck and a foundation and by combining design requirements;
(7) stirring the engineering muck and the reinforcing agent uniformly by using stirring equipment, wherein the stirring is generally carried out for more than 1 time;
(8) leveling and rolling the stirred residue soil tightly by using an excavator;
(9) and carrying out in-situ detection according to design requirements after the curing period.
4. The method for environmental protection and land reclamation of the layered reinforcement engineering slag soil and soft soil foundation according to the claim 1, the 2 or 3, characterized in that the shallow reinforcement area adopts multilayer reinforcement comprising a strong reinforcement layer and a weak reinforcement layer, the weak reinforcement layer is firstly constructed, then the strong reinforcement layer is constructed, the strong reinforcement layer is added with more reinforcing agent than the weak reinforcement layer, and the construction waste is mixed into the shallow reinforcement area.
5. The method for environmental friendly reclamation of engineering slag soil and soft soil foundation by layer according to claim 1, 2 or 3, wherein the reinforcing agent comprises a main agent and an auxiliary agent, the main agent comprises quicklime and/or cement, and the auxiliary agent comprises fly ash and/or activated ash MgO and/or metakaolin and/or magnesium phosphate and/or sodium silicate.
6. The method for environmentally friendly land reclamation by layer reinforcement of engineering slag soil and soft soil foundations as claimed in claim 4, wherein the reinforcing agent comprises a main agent and an auxiliary agent, the main agent comprises quick lime and/or cement, and the auxiliary agent comprises fly ash and/or activated ash MgO and/or metakaolin and/or magnesium phosphate and/or sodium silicate.
7. The method for environmental protection and land reclamation of the layered reinforcement engineering slag soil and soft soil foundation according to the claim 1, the 2 or the 3, characterized in that the stirring equipment is an excavator as a power source and is provided with a double-wheel stirring head and a screening hopper.
8. The environment-friendly land reclamation method for the layered reinforcement of the engineering muck and the soft soil foundation according to claim 6, wherein the stirring equipment is an excavator serving as a power source and is provided with a double-wheel stirring head and a screening hopper.
9. The method for environmental protection and land reclamation of the layered reinforced engineering slag soil and the soft soil foundation according to the claim 1, the 2 or the 3, wherein the engineering slag soil comprises silt, slurry, plain filling soil, construction waste and peat soil.
10. The method for environmental protection and land reclamation by layer strengthening engineering slag soil and soft soil foundation according to claim 8, wherein the engineering slag soil comprises silt, slurry, plain filling soil, construction waste and peat soil.
11. The method for environmental protection and land reclamation of the layered reinforcement engineering muck and the soft soil foundation according to the claim 1, 2 or 3, is characterized in that the crushed building demolition garbage is added into the shallow reinforcement area and is stirred together with other materials, the particle size of the demolition garbage is 5-50 mm, the usage amount accounts for 5-15% of the total amount, the building demolition garbage plays a role of aggregate and can reduce settlement, and the building garbage refers to demolition generation of main building walls, columns and the like.
12. The method for environmentally friendly reclamation of engineering slag and soft soil foundations by layers according to claim 7, wherein the stirring equipment is a crawler traveling type excavating stirrer, the reinforced pavement capable of being traveled by the crawler traveling type excavating stirrer is firstly solidified around the periphery of the operation area before stirring, the crawler traveling type excavating stirrer gradually stirs around the operation area and solidifies the traveling operation to the center of the operation area, and the soil turning and stirring operation is performed three times in total.
13. The method for environmental protection and land reclamation of the layered reinforcement engineering muck and the soft soil foundation according to the claim 1, 2 or 3, is characterized in that before the material paving and the stirring, the working area is scribed according to the use, the soil quality and the water content of each area, and curing materials with different proportions and/or dosage and/or types are paved on different areas formed by scribing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114538836A (en) * | 2022-03-17 | 2022-05-27 | 广东电网有限责任公司 | Soft soil curing agent, soft soil curing method and application thereof |
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| CN113914293A (en) * | 2021-10-14 | 2022-01-11 | 温州市渣土利用开发股份有限公司 | Method for reinforcing soft soil foundation by adopting aggregate framework-curing technology |
| CN114277763A (en) * | 2022-02-10 | 2022-04-05 | 中交路桥华东工程有限公司 | Treatment method of waste slag of underground engineering of carbonaceous shale formation |
| CN114538836A (en) * | 2022-03-17 | 2022-05-27 | 广东电网有限责任公司 | Soft soil curing agent, soft soil curing method and application thereof |
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