CN115126282A - Post-reinforcement method for permanent support of adjacent important building structures - Google Patents
Post-reinforcement method for permanent support of adjacent important building structures Download PDFInfo
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- 239000011381 foam concrete Substances 0.000 claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 39
- 239000002689 soil Substances 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
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- 244000025254 Cannabis sativa Species 0.000 claims abstract description 9
- 238000013461 design Methods 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000009415 formwork Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000012779 reinforcing material Substances 0.000 claims description 3
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- 239000012763 reinforcing filler Substances 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 2
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/04—Propping of endangered or damaged buildings or building parts, e.g. with respect to air-raid action
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- 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
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- 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
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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Abstract
The invention discloses a post-reinforcing method for permanent support of an adjacent important building in the technical field of building engineering, which comprises the steps of technical analysis, scheme determination, retaining wall heightening, slope surface leveling, gravel water filtering cushion filling, foam concrete layered pouring, slope surface geocell grass planting protection and the like. The invention simply disposes the constructed permanent support, adopts the foam concrete forming body with extremely light volume weight to replace the soil material with heavy volume weight, strong plasticity and poor stability as the reinforcing filler, and converts the gravity center influencing the reinforcing safety into the structure and the protection measures for changing the side slope, thereby realizing the overall safety of the high side slope environment of the important building, shortening the reinforcing period, saving the construction cost and providing good guidance for similar projects.
Description
Technical Field
The invention relates to the technical field of building engineering, in particular to a post-reinforcing method for permanent support of an adjacent important building.
Background
According to the distribution and the composition of the landform and the landform of different regions, the environments of a plurality of important building construction sites are more and more complicated, wherein the building construction sites are very common under the conditions that the building is built on a high side slope and the site with large topographic height difference and fluctuation, and under the conditions, permanent support is usually carried out on the periphery of the high side slope or the fluctuating site, and slope protection is carried out on the periphery so as to ensure the safety of the related building constructed in the site and the embodiment of the landform and the landscape of the site. However, due to the complex site conditions, the level of exploration techniques, the level of professional design and coordination, and the defects of construction organization, permanent support in some sections or areas may be completed but not enough to meet the requirements of support height and slope protection, and reinforcement and slope protection treatment are required.
At present, two conventional treatment methods are available, one method is to directly heighten and arrange a shear wall on an original supporting system, which generally does not affect the foundation or building structure formed on the periphery, but due to poor matching with the original supporting structure and the limitation of a stress structure, the soil retaining height is very limited, and great hidden danger is caused for the safety of later-stage slope protection and the peripheral structure; the other method is that the whole stress calculation of safety support is adopted based on the original support structure, the heightening reinforcement is carried out in an all-round mode according to the structure form of the original support system, the reinforcement treatment is complex, particularly, effective operation surfaces are provided for the vertical and horizontal large-range excavation of the periphery of the support, the damage to the related foundation and the building structure can be caused, and the operability is poor.
The method has less construction experience for similar projects at present in terms of reinforcement after permanent support in the environment close to important building structures and later slope integral protection, has the advantages of high strength, high stability and light volume weight along with the appearance of novel material foam concrete, can be used as a safe filling material of a special high slope to be compounded with a soil material in terms of volume weight compared with the soil material, has relatively low price, and has very important engineering application value in the research of the method for reinforcing after permanent support in the environment close to the important building structures and protecting the slope by using superiority of the material.
Disclosure of Invention
In order to overcome the defects of the existing post-reinforcement treatment method on the basis of permanent support, the invention aims to solve the technical problems that: a method of post-reinforcement for permanent support adjacent to an important building structure is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method of post-reinforcement for permanent support of adjacent critical building structures, comprising the steps of:
a. performing on-site reconnaissance on the supporting section and the periphery which need to be subjected to post reinforcement, looking up related data, and knowing the design and material technical parameters of the original supporting structure;
b. designing a new reinforcing section on the basis of the original supporting structure, determining the size of the reinforcing section, adopting foam concrete as a reinforcing material, and analyzing the mechanical property and stability of the whole supporting structure through software;
c. after the design is ensured to be correct, firstly, erecting a formwork at the top of the retaining wall of the original supporting structure and pouring foam concrete to form a reinforcing section shear wall, and then erecting a single-side wall formwork between two ends of the reinforcing section shear wall and a building;
d. compacting and leveling backfill in retaining walls of the original supporting structure, and then paving a gravel water filtering cushion layer;
e. taking a reinforcing section shear wall and a single-side wall template as pouring templates, and performing layered pouring on the gravel water filtering cushion layer by adopting foam concrete until the design height is reached to form foam concrete filler;
f. after the foam concrete filler is completely solidified, arranging geocells on the slope surface, and planting grass for protection.
Further, when the size of the reinforcing section is determined, the height of each position of the reinforcing section anchoring point A, the reinforcing section vertex B, the slope protection highest point C and the replacement and filling lowest point D, the vertical height H of the reinforcing section and the horizontal distance S between the reinforcing section and the boundary of the pile foundation of the important building are mainly included.
Further, when the reinforced supporting structure is analyzed, simulation deduction calculation is carried out by adopting the relevant professional design software of the rational rock soil and the pkpm, and a final processing scheme is determined.
Furthermore, before pouring of the reinforcing section shear wall, double rows of protection and operation frames are firstly erected on the outer side of the original supporting structure, then vertical steel bars are implanted into the top of the retaining wall, horizontal steel bars are bound on the vertical steel bars, and finally formwork supporting pouring is carried out.
Further, in the step d, cleaning the original slope surface, excavating the slope surface into a step surface, compacting and leveling, wherein the horizontal length of the step surface is 1-1.5m, and the height of the step surface is 0.3-0.5 m.
Further, when the gravel water filtering cushion layer is laid, 5-15mm of clean gravel is selected to be laid on the horizontal plane of the step surface, a steel wire closing net is firstly adopted on the vertical plane to serve as a support, and then the gravel is filled.
Furthermore, in the step e, the foam concrete filler is poured from the slope bottom to the slope top layer by layer along the step surface, the single pouring thickness is the height of the step, and the upper layer concrete pouring must be carried out after the lower layer concrete pouring is finished or the final setting is carried out.
And further, when the geocell is set in the step f, firstly spraying a layer of high-quality soil with the thickness of not less than 300mm on the foam concrete slope, then paving the geocell, and punching hook-shaped rivet piles at intervals to fix the geocell on the foam concrete slope, wherein the height of the hook-shaped rivet piles is not less than 2 times of the height of the geocell.
Further, after the grid chamber is opened and riveted, the space of the grid chamber is filled with high-quality improved soil suitable for planting turf or grass seeds from top to bottom, the filling height is not less than 1.2 times of the height of the grid chamber, and the vegetation is planted in time by patting fructification.
Further, after the vegetation is planted, a three-dimensional geonet pad is paved downwards from the top of the slope to the bottom of the slope, the transverse lapping width of the three-dimensional geonet pad is not less than 20cm, the longitudinal lapping width of the three-dimensional geonet pad is not less than 30cm, and U-shaped nails are inserted at intervals to anchor the three-dimensional geonet pad and the foam concrete slope together.
The beneficial effects of the invention are: by simply disposing constructed permanent supports, and adopting the foam concrete forming body with extremely light volume weight to replace a soil material with heavy volume weight, strong plasticity and poor stability as a reinforcing filler, the gravity center influencing the reinforcing safety is converted into a structure and a protection measure for changing the side slope, so that the overall safety of the high side slope environment where important building structures are located is realized, the reinforcing period is shortened, and the construction cost is saved.
Drawings
Fig. 1 is a schematic diagram of the original supporting structure.
FIG. 2 is a schematic view of the construction of the reinforcing section of the present invention.
FIG. 3 is a schematic view of the construction of the slope of the present invention.
Fig. 4 is a schematic diagram of an engineering structure in an embodiment of the present invention.
Marked in the figure as 1-original supporting structure, 2-reinforcing section, 3-building structure, 11-retaining wall, 12-backfill, 21-reinforcing section shear wall, 22-gravel water filtering cushion layer, 23-foam concrete filler, 24-geocell, 25-hook rivet pile, 26-three-dimensional geonet cushion, 27-U-shaped nail and 31-pile foundation.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1 and 2, the post-reinforcement method for permanent support of adjacent important building structures of the present invention comprises the following steps:
a. performing on-site reconnaissance on the supporting section and the periphery which need to be subjected to post reinforcement, looking up related data, and knowing the design and material technical parameters of the original supporting structure 1;
b. designing a new reinforcing section 2 on the basis of the original supporting structure 1, determining the size of the reinforcing section 2, adopting foam concrete as a reinforcing material, and analyzing the mechanical property and stability of the whole supporting structure through software;
c. after the design is ensured to be correct, firstly, a formwork is erected on the top of the retaining wall 11 of the original supporting structure 1 and foam concrete is poured to form a reinforcing section shear wall 21, and then a single-side wall formwork is erected between two ends of the reinforcing section shear wall 21 and a pile foundation 31 of a building 3;
d. compacting and leveling the backfill soil 12 in the retaining wall 11 of the original supporting structure 1, and then paving a gravel water filtering cushion layer 22;
e. taking the reinforcing section shear wall 21 and the single-side wall template as pouring templates, and performing layered pouring on the gravel water filtering cushion layer by adopting foam concrete until the foam concrete reaches the design height to form a foam concrete filler 23;
f. after the foam concrete filler 23 is completely solidified, the slope surface is provided with the geocell 24, and grass is planted for protection.
The invention mainly adopts the foam concrete forming body with extremely light volume weight to replace the soil material with heavy volume weight, strong plasticity and poor stability as the reinforcing filler, has small influence and reconstruction on the original supporting structure 1, has light weight and high strength, does not cause burden on the bearing of the original supporting structure 1, and can ensure the stability and the safety of the supporting.
When a field reconnaissance is carried out, the following contents are mainly included: the field investigation is carried out, and the mode of the foundation of the original supporting structure 1 is checked, wherein the mode can be replacement filling or pile foundation; checking the retaining wall of the original supporting structure, which can be a retaining wall, a bearing retaining wall and other various retaining walls, and knowing the structure and the current situation of the retaining wall; checking the implementation condition and the current situation of the pile foundation 31 of the building 3; checking the implementation condition or the current situation of the basement structure or the foundation or the building 3, wherein the building 3 can be implemented or implemented after being completed; checking the current situations of foundation soil and backfill soil, wherein at the moment, as the implementation conditions of the building 3 or the foundation are ensured, the backfill soil is always implemented, more adverse factors are brought to reinforcement treatment, hidden dangers and risks possibly generated in the implementation treatment scheme and the implementation process are comprehensively analyzed, and corresponding emergency measures are made.
When consulting the data, mainly include: the design drawing, technical change, drawing review, geological survey report and other related technical documents of the original supporting structure 1 are fully consulted, and the elevation of the boundary horizontal distance S between the supporting and the pile foundation 31 of the building structure 3, the height of the anchoring section A of the reinforcing section and the lowest filling point D, the geotechnical characteristics, the related supporting structure design and the related material technical parameters are measured in real time on site by combining the surveying condition.
According to the data, when the size of the reinforcing section 2 is determined, the elevation of the top point B of the reinforcing section is mainly determined according to the anchoring point A of the reinforcing section, and the elevation of the highest point C of the slope protection and the vertical height H of the reinforcing section are determined according to the lowest filling point D. After the size, the volume weight and the strength grade of the rear foam concrete are determined, the mechanical properties such as the strength, the weight, the stability and the like of the reinforced section and the whole supporting structure can be calculated through deduction of special software. And when the reinforced supporting structure is analyzed, simulation deduction calculation is carried out by adopting relevant professional design software of the rock and soil texture and the pkpm, and a final processing scheme is determined.
Before pouring of the reinforcing section shear wall 21, double rows of protection and operation frames need to be erected on the outer side of the original supporting structure 1 to prevent the high falling risk in the construction project, then vertical steel bars are implanted into the top of the retaining wall 11, horizontal steel bars are bound on the vertical steel bars, and finally formwork erection pouring is carried out.
In the step d, in order to ensure the stability of the slope surface, the preferable scheme of the application is that the original slope surface of the backfill soil 12 is cleaned firstly, then the slope surface is excavated into a step surface, and then compaction and leveling are carried out, wherein the horizontal length of the step surface is 1-1.5m, and the height of the step surface is 0.3-0.5 m. Change domatic into the step face, can increase the stability of follow-up filler, avoid appearing the relative slip phenomenon. The step surface is arranged according to the size, so that the stability of the original slope surface can be ensured, and a better bearing effect is achieved.
When the gravel water filtering cushion layer 22 is laid, clean gravel with the optimal size of 5-15mm is laid on the horizontal plane of the step surface, a steel wire closing-in net is firstly adopted as a supporting block on the vertical plane, and then gravel is filled. The gravel water filtering cushion layer 22 is beneficial to water flow discharge and guide, and the stability of the foam concrete filler 23 is improved.
In step e, the foam concrete filler 23 is poured from the slope bottom to the slope top layer by layer along the step surface, the single pouring thickness is the height of the step, which is about 300mm, the foam concrete strength and the volume weight must be configured according to the parameters determined by calculation, and in order to avoid foam damage, the upper layer concrete pouring must be performed after the lower layer concrete pouring is completed or after final setting.
As shown in fig. 3, when the geocell 24 is set in step f, a layer of high quality soil with a thickness of not less than 300mm is sprayed on the slope of the foam concrete filler 23, then the geocell is paved, the geocell should be paved from top to bottom in the main stress direction, the geocell assembly is fully opened, hook-shaped rivets 25 are driven at intervals to fix the geocell on the foam concrete slope, and one hook-shaped rivet 25 can be driven into each geocell. The height of the hook-shaped riveting pile 25 is not less than 2 times of the height of the grid chamber, preferably, the length of the hook-shaped riveting pile 25 is 2 times of the height of the grid chamber plus 30cm, for example, 5cm of the grid chamber, and the hook-shaped riveting pile 25 is 2 multiplied by 5cm +30cm and is 40cm in length.
After the grid chamber is opened and riveted, the space of the grid chamber is filled with high-quality improved soil suitable for planting turf or grass seeds from top to bottom, the filling height is not less than 1.2 times of the height of the grid chamber, and the vegetation is planted in time by patting and firming. After the vegetation is planted, a three-dimensional geonet pad 26 is paved downwards from the top of the slope to the bottom of the slope, the transverse lapping width of the three-dimensional geonet pad 26 is not less than 20cm, the longitudinal lapping width is not less than 30cm, and U-shaped nails 27 are inserted at intervals to anchor the three-dimensional geonet pad and the foam concrete slope together. Finally, after the three-dimensional geonet pad 26 is laid, water is uniformly sprinkled to the slope surface, and the water should penetrate into the slope surface by not less than 5 cm. And (3) spraying seeds which meet the requirements and are combined with grass and shrubs on the slope surface filled with the soil, throwing 1-2 cm of fine grains to the surface of the three-dimensional geonet pad 26 for planting the fertile soil, enabling the soil and the seeds to leak into the three-dimensional geonet pad 26 and gaps below the three-dimensional geonet pad, finishing the surface, removing impurities, maintaining in time and completing the grass planting protection of the geocell.
The invention is further illustrated by the following examples.
Example one
The matched housing and talent apartment project in a certain city is a group high-rise residential project, the total building area is 148937.13 square meters, the basement has two layers, the foundation comprises a pile foundation, a raft and an independent foundation, the basement has a frame structure, the ground shear wall has a structure, the total height of the building is 6.150 m-79.950 m, and the construction cost is 4.48 hundred million yuan. The construction site is big in height and low fluctuation from north to south, extremely irregular in shape, later-stage basements are also arranged from north to south from hidden to hollowed, particularly, west-side construction structures are constructed on a high slope of 20m, seven sections of permanent support structure designs with different height differences and different supports are adopted, the permanent support structure designs comprise pile plate wall supports, double-row pile foundation joist retaining walls and pile-foundation-free retaining wall forms, specifically, as shown in figure 4, important construction structures on the periphery of the west side are located on a high slope filling foundation, backfill compacted pile foundations are used as a bearing layer structure, and design and construction conditions are extremely difficult.
When permanent support is completely finished and peripheral high slope backfill is carried out to shape the broken slope, the CD section gap reservation can not meet the high slope mound and basement structure backfill hiding requirements, collapse phenomenon is generated, and meanwhile deformation risk is generated to important building structures located at the periphery in the later period, and 6m height and 12mX12m length and width need to be backfilled.
The professional personnel adopt the conventional backfill and support heightening treatment through calculation, foundation soil with the depth of 12 meters and the length and width of 24 meters needs to be dug to meet the reinforcement requirement, the damage risk of important structures such as pile foundations, basements, retaining walls and the like of permanent supports and important building structures is inevitably caused, the operation difficulty is high, and the treatment period and the cost are quite large.
Through special research, the method provided by the application is adopted, the gaps are replaced and filled with the foam concrete with the corresponding thickness, the corresponding strength and the corresponding volume weight through design calculation, the CD sections are simply protected and reinforced by the shear walls, the slope surfaces are in the geocell slope protection shape, after long-period deformation observation, the important building structures and the high slope are safe and stable, and finally the purposes of permanent support, post-reinforcement and slope protection in the environment close to the important building structures are achieved. Therefore, the post-reinforcement method for the permanent support of the adjacent important building structures has the advantages of high operability, short treatment period, low input cost and high safety, and can provide good guidance for similar projects.
Claims (10)
1. A method of post-reinforcement of permanent supports for adjacent important structures, comprising the steps of:
a. performing on-site reconnaissance on the supporting section and the periphery which need to be subjected to post reinforcement, and looking up related data to know the design and material technical parameters of the original supporting structure (1);
b. designing a new reinforcing section (2) on the basis of the original supporting structure (1), determining the size of the reinforcing section (2), adopting foam concrete as a reinforcing material, and analyzing the mechanical property and stability of the whole supporting structure through software;
c. after the design is ensured to be correct, firstly, a formwork is erected at the top of a retaining wall (11) of an original supporting structure (1) and foam concrete is poured to form a reinforcing section shear wall (21), and then a single-side wall formwork is erected between two ends of the reinforcing section shear wall (21) and a pile foundation (31) of a building (3);
d. compacting and leveling backfill (12) in a retaining wall (11) of an original supporting structure (1), and then paving a gravel water filtering cushion (22);
e. taking a reinforcing section shear wall (21) and a single-side wall template as pouring templates, and performing layered pouring on the gravel water filtering cushion (22) by adopting foam concrete until reaching the design height to form a foam concrete filler (23);
f. after the foam concrete filler (23) is completely solidified, a geocell (24) is arranged on the slope surface at the top of the foam concrete filler, and grass planting protection is carried out.
2. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 1, wherein: when the size of the reinforcing section (2) is determined, the height of each point of the reinforcing section anchoring point A, the reinforcing section vertex B, the slope protection highest point C and the filling lowest point D, the vertical height H of the reinforcing section and the horizontal distance S between the reinforcing section and the boundary of the building (3) are mainly included.
3. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 1, wherein: and when the reinforced supporting structure is analyzed, simulation deduction calculation is carried out by adopting relevant professional design software of the rock and soil texture and the pkpm, and a final processing scheme is determined.
4. A method of post-reinforcement for permanent support of adjacent critical building structures according to claim 1, characterized by: before pouring of a reinforcing section shear wall (21), double rows of protection and operation frames are firstly erected on the outer side of an original supporting structure, then vertical steel bars are implanted into the top of a retaining wall (11), horizontal steel bars are bound on the vertical steel bars, and finally formwork erection pouring is carried out.
5. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 1, wherein: in the step d, firstly cleaning the slope surface of the original backfill soil (12), then excavating the slope surface into a step surface, compacting and leveling, wherein the horizontal length of the step surface is 1-1.5m, and the height of the step surface is 0.3-0.5 m.
6. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 5, wherein: when the gravel water filtering cushion layer (22) is laid, 5-15mm of clean gravel is laid on the horizontal plane of the step surface, a steel wire closing net is firstly adopted as a support on the vertical plane, and then the gravel is filled.
7. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 1, wherein: in the step e, the foam concrete filler (23) is poured from the slope bottom to the slope top layer by layer along the step surface, the single pouring thickness is the height of the step, and the upper layer concrete pouring is carried out after the lower layer concrete pouring is finished or the final setting is carried out.
8. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 1, wherein: and f, when the geocell (24) is set in the step f, firstly, spraying a layer of high-quality soil with the thickness of not less than 300mm on the slope surface of the foam concrete filler (23), then paving the geocell, and punching hook-shaped rivet piles (25) at intervals to fix the geocell on the slope surface of the foam concrete, wherein the height of the hook-shaped rivet piles (25) is not less than 2 times of the height of the geocell.
9. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 8, wherein: after the grid chamber is opened and riveted, the space of the grid chamber is filled with high-quality improved soil suitable for planting turf or grass seeds from top to bottom, the filling height is not less than 1.2 times of the height of the grid chamber, and the vegetation is planted in time by patting and firming.
10. The method of post-reinforcement for permanent support adjacent critical construction structures of claim 9, wherein: after the vegetation is planted, a three-dimensional geonet pad (26) is paved downwards from the top of the slope to the bottom of the slope, the transverse lapping width of the three-dimensional geonet pad (26) is not less than 20cm, the longitudinal lapping width is not less than 30cm, and U-shaped nails (27) are inserted at intervals to anchor the three-dimensional geonet pad and the foam concrete slope together.
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