CN115059111B - Marginal backfill reinforced retaining wall and preparation method thereof - Google Patents
Marginal backfill reinforced retaining wall and preparation method thereof Download PDFInfo
- Publication number
- CN115059111B CN115059111B CN202210579903.4A CN202210579903A CN115059111B CN 115059111 B CN115059111 B CN 115059111B CN 202210579903 A CN202210579903 A CN 202210579903A CN 115059111 B CN115059111 B CN 115059111B
- Authority
- CN
- China
- Prior art keywords
- backfill
- marginal
- filling
- soil
- improved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
- E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0283—Retaining or protecting walls characterised by constructional features of mixed type
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
Landscapes
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention relates to a marginal backfill reinforced retaining wall and a preparation method thereof, wherein the marginal backfill reinforced retaining wall comprises a panel (1), a reinforcement material (2), a filling main body (3) and an improved filling layer (4); the panel (1) is arranged at the outer side of the filling main body (3), the rib materials (2) are layered in the filling main body (3), and an improved filling layer (4) is arranged at the outer side of the rib materials (2); the improved soil filling layer (4) is composed of improved marginal backfill soil added with xanthan gum and casein. Compared with the prior art, the invention not only can strengthen the soil and improve the interfacial strength of the reinforced soil, but also can reduce the influence of permeability reduction caused by the blockage of soil pores by the produced biopolymer gel.
Description
Technical Field
The invention relates to the technical field of reinforced soil, in particular to a marginal backfill reinforced retaining wall and a preparation method thereof.
Background
With the development of reinforced soil technology, reinforced soil retaining walls are widely applied to projects such as embankments and side slopes with excellent performances. The reinforced retaining wall consists of three parts, namely a reinforced material, a panel and filling soil, wherein the filling soil is required to have the characteristics of good drainage performance, strong construction operability, good interaction of the reinforced soil and the like. The existing specifications require that the filling soil generally adopts coarse-grained soil with high internal friction performance, such as sandy soil, broken stone and the like with good grain composition, namely the soil with the fine grain content not exceeding 15 percent and the plasticity index not exceeding 6. However, in practical engineering, the filling soil meeting the requirements is not easy to obtain and has higher cost, so that students propose to obtain materials locally, use marginal backfill soil, solve the problems of low permeability of marginal backfill soil, low strength of a reinforced soil interface and the like by using a geotechnical composite material layer, and obtain a certain effect, but the method has the defects of low mechanical strength, poor water stability, large deformation, low stability and the like of the reinforced soil interface.
In recent years, new ecological materials are continuously introduced for enhancing soil strength and reducing the harm of traditional additives to the environment, wherein a method for improving soil by utilizing biopolymers has become a research hotspot and the leading field. Biopolymers are naturally occurring polymers with high strength, innocuous and biodegradable properties, which are considered viable alternatives to traditional chemical polymers because of their cost savings, low environmental impact and lack of secondary pollution. In addition, biopolymers also have high stability under complex environmental conditions, for example xanthan gum remains stable over a wide range of temperatures and pH. The prior researches show that the biopolymer can be used for soil reinforcement, soil penetration control, erosion reduction, dust control and sewage treatment, and has obvious effect, convenient construction and economic saving. Most biopolymers are based on polysaccharides, which are hydrophilic, which indicates that soil strength can be significantly improved by treating the soil with biopolymers, but strengthening effect is easily affected by water.
Disclosure of Invention
The invention aims to provide a marginal backfill reinforced retaining wall and a preparation method thereof, which are used for reinforcing soil and improving the interfacial strength of reinforced soil.
The aim of the invention can be achieved by the following technical scheme: a marginal backfill reinforced retaining wall comprises a panel, a reinforcement, a fill main body and an improved fill layer; the panel is arranged at the outer side of the filling main body, the reinforcement is layered in the filling main body, and an improved filling layer is arranged at the outer side of the reinforcement; the improved filling layer is composed of improved marginal backfill added with xanthan gum and casein.
Preferably, in the improved marginal backfill, the mass ratio of the xanthan gum to the casein is 1:2-4.
Further preferably, in the modified marginal backfill, the mass ratio of the xanthan gum to the casein is 1:3.
Preferably, in the improved marginal backfill, the total added mass of the xanthan gum and the casein is 1.5-2.5% of the marginal backfill.
Further preferably, in the improved marginal backfill, the total added mass of the xanthan gum and the casein is 2 percent (the ratio of the dry mass of the biopolymer to the dry mass of the dry soil) of the marginal backfill, the marginal backfill is treated by the mixed biopolymer with the ratio and the doping amount, and the optimal water content is selected as the initial water content.
Preferably, the improved marginal backfill soil is further added with a bactericide.
Still more preferably, 0.2% (mass of bactericide to mass of biopolymer-soil mixture) of bactericide is added at the time of treatment to reduce the influence of fungal growth on the treatment effect.
Further preferably, the preparation method of the improved marginal backfill soil comprises the following steps: mixing the marginal backfill, the xanthan gum and the casein, adding the bactericide, adding water after uniformly mixing, stirring while adding water, and fully and uniformly mixing.
Still more preferably, the water is added in an amount of an optimal water content determined according to a compaction test method.
Preferably, the ribs are horizontally arranged, and the upper side and the lower side are both provided with improved filling layers.
Preferably, the filling body is filled with marginal backfill.
The preparation method of the marginal backfill reinforced retaining wall comprises the following steps:
s1: installing a panel;
s2: layering and filling marginal backfill soil;
s3: filling improved marginal backfill soil in a layered manner;
s4: laying rib materials;
s5: filling improved marginal backfill soil above the reinforcement in a layered manner;
s6: and repeating the steps S2 to S5 until filling is completed.
Further preferably, the method for preparing the marginal backfill reinforced retaining wall specifically comprises the following steps:
s1: installing a panel;
s2: filling marginal backfill soil in layers, and compacting the backfill soil to 92% compactness by using a flat plate vibration compactor;
s3: the existing improved marginal backfill is filled in layers, the filling height is 10% of the reinforcement spacing, and the minimum treatment range is not lower than 2cm and the maximum treatment range is not more than 20cm;
s4: laying rib materials;
s5: the existing improved marginal backfill is filled above the reinforcement in a layered manner, the filling height is 10% of the reinforcement interval, and the minimum treatment range is not lower than 2cm and the maximum treatment range is not more than 20cm;
s6: and repeating the steps S2 to S5 until filling is completed.
The marginal backfill is mostly derived from soil obtained by digging in situ or transferring from other sites, wherein the clay mineral content with the particle size smaller than 0.075mm is more than 15%, or the plasticity index is more than 6. The marginal backfill soil has the characteristics of poor drainage performance, difficult compaction and low strength.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the improved filling layer formed by the improved marginal backfill soil added with xanthan gum and casein is arranged on the outer side of the reinforcement, so that the soil can be reinforced, the interfacial strength of the reinforcement is improved, and the influence of permeability reduction caused by blocking of soil pores by the generated biopolymer gel can be reduced;
2. the invention improves the filling soil in a certain area near the reinforcement material in the edge backfill reinforced retaining wall, can effectively improve the stability of the structure and control the deformation, and compared with the traditional coarse-grained soil reinforced retaining wall, the method not only can meet the engineering design requirement, but also can save the cost and reduce the carbon emission;
3. in the invention, the xanthan gum is combined with the hydrophobic biopolymer, and in the protein structure, the nonpolar side chain of the amino acid has a hydrophobic bond, and the interaction between the hydrophobic bond and water molecules is minimum, so that the water resistance of soil after the biopolymer is treated can be improved by using the protein-based biopolymer as a soil binder;
4. according to the invention, through the design of the addition amount and the proportion of the xanthan gum and the casein, the reasonable use amount can be ensured, the advantages of the xanthan gum for improving the strength of a reinforced soil interface and the casein for improving the drainage performance of backfill soil can be fully exerted, and the optimal treatment effect can be ensured;
5. according to the invention, the optimal water content is determined through a compaction test, so that the maximum relative compactness of the filled soil can be achieved, and the optimal engineering performance is ensured to be realized;
6. according to the invention, through the design of the preparation steps of the reinforced retaining wall, the optimal treatment effect can be ensured, and the cross-linked structure of the treated backfill is prevented from being damaged due to improper construction operation, so that the improvement performance is reduced.
Drawings
FIG. 1 is a schematic view of the construction of a side backfill reinforced retaining wall according to the present invention;
FIG. 2 is a schematic view of the microstructure of the reinforced soil interface of the present invention;
in the figure: 1-panel, 2-reinforcement, 3-filler body, 4-modified filler layer, 5-reinforcement interface microstructure, 51-biopolymer molecular chain, 52-marginal clay mineral, 53-cation.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
The marginal backfill reinforced retaining wall comprises a panel 1, a rib material 2, a filling main body 3 and an improved filling layer 4, wherein the filling main body 3 is formed by filling marginal backfill, the panel 1 is vertically arranged on the outer side of the filling main body 3, the rib material 2 is horizontally paved in the filling main body 3 in a layered manner, and the improved filling layer 4 is arranged on the upper side and the lower side of the rib material 2; the modified fill layer 4 is composed of modified marginal backfill added with a biopolymer. In this example, the biopolymer is selected from xanthan gum and casein. Xanthan is a high molecular chain and gel type biopolymer produced by fermenting glucose or sucrose with xanthomonas campestris bacteria, and casein is a protein-based biopolymer. The xanthan gum has hydrophilicity, and the casein is hydrophobic, so that the mixture of the xanthan gum and the casein in a certain proportion is used for treating the marginal backfill soil, thereby not only strengthening the soil and improving the strength of a reinforced soil interface, but also reducing the influence of permeability reduction caused by blocking soil pores by the generated biopolymer gel. The reinforced soil interface microstructure 5 of this embodiment is shown in fig. 2.
Example 2
As shown in fig. 1, the reinforced earth retaining wall of the present invention is also composed of three parts of a reinforcement material 2, a panel 1 and earth filling, as in the case of the conventional reinforced earth retaining wall. In practical engineering, the reinforcement influence ranges corresponding to different reinforcement types and filling types are different, and the filling amount, the biopolymer (xanthan gum and casein) amount and the bactericide amount required to be treated are determined according to the design scheme. As shown in fig. 2, as natural cations 53 are adsorbed on the surface of soil particles (such as marginal clay minerals 52), xanthan gum is used as an anionic polymer, and carboxyl groups and hydroxyl groups on a molecular chain form ionic bond bridging with soil particles through cations. With the extension of the solidification time, the water content of the soil body is reduced, the ionic bond effect is rapidly enhanced, the biopolymer molecular chains 51 are firmly adsorbed on the surface of soil particles, the extremely strong cementing effect is achieved among the soil particles and between the reinforced soil interfaces, and the mechanical strength of the soil body and the reinforced soil interfaces is improved. It should be noted that: the backfill compaction damages the cross-linked structure already formed, affecting the treatment effect, so that the backfill can not be placed for too long while being treated according to the construction progress.
The specific implementation steps are as follows:
1) Taking a certain amount of marginal backfill for an indoor test, doping 2% of mixed biopolymer, uniformly mixing, and performing a compaction test to determine the optimal water content and the maximum dry density;
2) Installing a panel;
3) When backfilling construction of the reinforced retaining wall, filling untreated marginal backfill soil to a specified height in a layering manner;
4) Mixing a predetermined amount of marginal backfill with 2% of xanthan gum with the ratio of 1:3 and casein biopolymer, adding 0.2% of bactericide, adding water in an amount of optimal water content after uniform mixing, stirring while adding water, and fully and uniformly mixing;
5) Filling the treated marginal backfill soil in layers, wherein the filling height is 10% of the reinforcement spacing;
6) Laying rib materials according to design requirements;
7) The processed marginal backfill is filled on the reinforcement material in a layering way, and the filling height is 10% of the reinforcement spacing;
8) Repeating the steps 3) to 7) until filling is completed.
Example 3
A marginal backfill soil reinforced retaining wall and a preparation method thereof are provided, the construction is carried out on a soil slope at one side of a mountain road, the type of the marginal soil is high liquid limit clay, and the initial water content is 15%. Taking a certain amount of marginal backfill to perform an indoor test, mixing 2% of mixed biopolymer, uniformly mixing, and performing a standard compaction test according to the requirements of the geotechnical test procedure of the industry standard of the people's republic of China to determine that the optimal water content and the maximum dry density are 21% and 16.5kN/m respectively 3 。
The specific implementation steps are as follows:
1) A panel 1 with a height of 9m is vertically arranged;
2) When the reinforced retaining wall is backfilled, the untreated marginal backfill soil is filled in layers, and is compacted to 67.5cm by a flat plate vibration compactor, so that the compaction degree reaches 92%;
3) Every 1000kg of marginal backfill is mixed with 2% of xanthan gum with the proportion of 1:3 and casein biopolymer, then 2kg of bactericide with the proportion of 0.2% is added, after even mixing, 60kg of water is added, and stirring is carried out while full mixing is carried out;
4) Filling the treated marginal backfill soil layer by layer, wherein the filling height is 7.5cm, and compacting by using a flat plate vibration compactor to reach 92% of maximum compaction degree;
5) Laying a layer of rib materials according to design requirements, wherein 11 layers of rib materials are required to be laid on the reinforced retaining wall, the distance between two adjacent layers of rib materials is 75cm, the length of the reinforced rib is 7m, the type of the rib materials is PET geogrid, and the size is 426mm multiplied by 51mm;
6) Filling the treated marginal backfill soil on the reinforcement material in layers, wherein the filling height is 7.5cm, and compacting by using a flat plate vibration compactor to reach 92% compactness;
7) Repeating the steps 2) to 6) until filling is completed.
The friction angle of the rib-soil interface of the reinforced retaining wall structure of the embodiment is 41 degrees by adopting a large-scale drawing test method;
the ratio of the maximum horizontal displacement to the wall height of the reinforced retaining wall is 0.5% measured by adopting a displacement monitoring method;
the stability of the reinforced retaining wall structure of this embodiment is 2.1 obtained by adopting the limit balance method.
Comparative example 1
The reinforced retaining wall is built by taking local laterite as backfill soil in a certain place. The content of fine particles with the particle size smaller than 0.075mm in the filling is 55 percent, the plasticity index is 24, and the filling belongs to marginal backfill. The optimal water content of the filled soil obtained by compaction test is 25.5%, and the maximum dry density is 15.5kN/m 3 . The retaining wall has a height of 9m, the used rib materials are PET geogrids, the size is 426mm multiplied by 51mm, the reinforcement length is 7m, the number of reinforcement layers is 11, and the reinforcement distance is 75cm. The monitoring result shows that the suction force of the backfill soil of the retaining wall is completely lost in about 2 days of rainfall; the safety coefficient of the retaining wall is gradually reduced along with rainfall infiltration, and the safety coefficient is reduced to less than 1.5 within 2 days; deformation of the retaining wall increased from 23mm to 73mm in 3 days; the maximum tensile force of the tendon reaches 5kN/m after 3 days, and is increased by 2 times compared with the initial state.
Untreated fine-grained soil has the defects of low strength and easy softening when meeting water when used as a reinforced soil structure filler, and the filler treated by adopting xanthan gum and casein can obviously overcome the defects.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (8)
1. The marginal backfill reinforced retaining wall is characterized by comprising a panel (1), a reinforcement material (2), a filling body (3) and an improved filling layer (4); the panel (1) is arranged at the outer side of the filling main body (3), the rib materials (2) are layered in the filling main body (3), and an improved filling layer (4) is arranged at the outer side of the rib materials (2); the improved filling layer (4) is formed by improved marginal backfill added with xanthan gum and casein;
in the improved marginal backfill, the mass ratio of the xanthan gum to the casein is 1:2-4;
in the improved marginal backfill, the total addition mass of the xanthan gum and the casein is 1.5-2.5% of the marginal backfill.
2. The edge backfill reinforced retaining wall of claim 1, wherein the modified edge backfill has a mass ratio of xanthan gum to casein of 1:3.
3. The reinforced side backfill retaining wall of claim 1, wherein said modified side backfill further comprises a biocide.
4. The reinforced side backfill retaining wall of claim 3, wherein the improved side backfill is prepared by: mixing the marginal backfill, the xanthan gum and the casein, adding the bactericide, adding water after uniformly mixing, stirring while adding water, and fully and uniformly mixing.
5. The marginal backfill reinforced retaining wall according to claim 1, wherein the reinforcement (2) is horizontally arranged, and the upper and lower sides are provided with improved fill layers (4).
6. The marginal backfill reinforced retaining wall according to claim 1, wherein said fill body (3) is filled with marginal backfill.
7. A method of making a reinforced retaining wall for marginal backfill as claimed in any one of claims 1 to 6, comprising the steps of:
s1: installing a panel;
s2: layering and filling marginal backfill soil;
s3: filling improved marginal backfill soil in a layered manner;
s4: laying rib materials;
s5: filling improved marginal backfill soil above the reinforcement in a layered manner;
s6: and repeating S2-S5 until filling is completed.
8. The method for preparing the marginal backfill reinforced retaining wall as set forth in claim 7, comprising the steps of:
s1: installing a panel;
s2: filling marginal backfill soil in layers, and compacting the backfill soil to 92% compactness by using a flat plate vibration compactor;
s3: filling improved marginal backfill soil in layers, wherein the filling height is 10% of the reinforcement spacing;
s4: laying rib materials;
s5: filling improved marginal backfill soil above the reinforcement material in a layered manner, wherein the filling height is 10% of the reinforcement spacing;
s6: and repeating S2-S5 until filling is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210579903.4A CN115059111B (en) | 2022-05-25 | 2022-05-25 | Marginal backfill reinforced retaining wall and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210579903.4A CN115059111B (en) | 2022-05-25 | 2022-05-25 | Marginal backfill reinforced retaining wall and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115059111A CN115059111A (en) | 2022-09-16 |
| CN115059111B true CN115059111B (en) | 2023-09-26 |
Family
ID=83199251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210579903.4A Active CN115059111B (en) | 2022-05-25 | 2022-05-25 | Marginal backfill reinforced retaining wall and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115059111B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223348A (en) * | 2016-07-18 | 2016-12-14 | 河海大学 | A kind of microorganism GSZ associating reinforcement method |
| CN107524159A (en) * | 2017-01-19 | 2017-12-29 | 湖南大学 | A kind of hybrid reinforced soil retaining wall |
| CN109913224A (en) * | 2018-12-29 | 2019-06-21 | 上海理工大学 | A kind of preparation method improveing soil |
| CN113604222A (en) * | 2021-07-12 | 2021-11-05 | 中国地质大学（武汉） | Soil curing agent and application thereof |
| CN113667483A (en) * | 2021-07-16 | 2021-11-19 | 山东大学 | Application of casein-glucan graft adhesive to improvement of tailing sand soil |
| CN214832546U (en) * | 2021-06-09 | 2021-11-23 | 石家庄铁道大学 | Layered reinforced clay structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO329577B1 (en) * | 2003-03-13 | 2010-11-15 | Torfinn Johnsen | Mixture for treating a soil surface and / or a soil mass and its use. |
-
2022
- 2022-05-25 CN CN202210579903.4A patent/CN115059111B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223348A (en) * | 2016-07-18 | 2016-12-14 | 河海大学 | A kind of microorganism GSZ associating reinforcement method |
| CN107524159A (en) * | 2017-01-19 | 2017-12-29 | 湖南大学 | A kind of hybrid reinforced soil retaining wall |
| CN109913224A (en) * | 2018-12-29 | 2019-06-21 | 上海理工大学 | A kind of preparation method improveing soil |
| CN214832546U (en) * | 2021-06-09 | 2021-11-23 | 石家庄铁道大学 | Layered reinforced clay structure |
| CN113604222A (en) * | 2021-07-12 | 2021-11-05 | 中国地质大学（武汉） | Soil curing agent and application thereof |
| CN113667483A (en) * | 2021-07-16 | 2021-11-19 | 山东大学 | Application of casein-glucan graft adhesive to improvement of tailing sand soil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115059111A (en) | 2022-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Bio-remediation of desiccation cracking in clayey soils through microbially induced calcite precipitation (MICP) | |
| CN103555339B (en) | A kind of high waterproof soil-solidified-agent and application thereof | |
| CN101063036A (en) | Chemical modifying method for swelled ground treatment | |
| CN101831901A (en) | Shallow poor subsoil composite foundation stabilization treatment method | |
| CN102011394A (en) | Method for reinforcing aeolian sandy soil by polypropylene fibers | |
| CN1730841A (en) | Slope support method by compacting soil-lime to form cushion solid | |
| CN113652915B (en) | Road construction process | |
| Xu et al. | Feasibility of vacuum consolidation in managing dredged slurries with wheat straw as drainage channels | |
| CN115059111B (en) | Marginal backfill reinforced retaining wall and preparation method thereof | |
| CN1289625C (en) | Bentonite anti-seep jointing material | |
| CN212533589U (en) | Anti-crack roadbed and pavement structure | |
| CN103195051B (en) | Limestone soil and pervious concrete pile composite foundation and treatment method thereof | |
| CN102839647B (en) | Stirring pile-permeable concrete pile compound foundation and treatment method thereof | |
| CN115573213A (en) | High liquid limit clay roadbed structure and construction method | |
| CN1683719A (en) | Expansion soil ecological modifying agent and construction method | |
| CN105970903A (en) | Plastic concrete mattress layer for enhancing pile and soil combined effect of composite foundation | |
| CN113201987B (en) | Roadbed base of high liquid limit clay ground and construction method thereof | |
| Kumar et al. | Effect of lime (content &duration) on strength of cohesive soil | |
| CN211816368U (en) | Ecological environment-friendly foundation structure for reinforcing soft foundation | |
| CN112321225A (en) | Curing agent for curing soft soil and widening roadbed | |
| Kasim et al. | Unconfined compressive strength and microstructure of clay soil stabilised with biomass silica | |
| CN112321224A (en) | Preparation method of curing agent for curing soft soil and widening roadbed | |
| CN112456918A (en) | Silt curing material and silt curing method | |
| RAZALI et al. | STRENGTH ENHANCEMENT OF REINFORCED PEAT WITH RUBBER WASTE AND MELAMINE UREA FORMALDEHYDE (MUF) RESIN | |
| Yu et al. | Field test study on treatment of dredged soil with cotton straw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |