CN219951578U - Non-excavation reinforced structure of urban road collapsibility loess road bed - Google Patents
Non-excavation reinforced structure of urban road collapsibility loess road bed Download PDFInfo
- Publication number
- CN219951578U CN219951578U CN202321380984.1U CN202321380984U CN219951578U CN 219951578 U CN219951578 U CN 219951578U CN 202321380984 U CN202321380984 U CN 202321380984U CN 219951578 U CN219951578 U CN 219951578U
- Authority
- CN
- China
- Prior art keywords
- pile
- grouting pile
- road
- jet grouting
- subgrade
- 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
- 238000009412 basement excavation Methods 0.000 title claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 57
- 239000000843 powder Substances 0.000 claims abstract description 31
- 201000010099 disease Diseases 0.000 claims abstract description 28
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims abstract description 28
- 230000002787 reinforcement Effects 0.000 abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 238000010276 construction Methods 0.000 abstract description 21
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000007654 immersion Methods 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 21
- 238000005507 spraying Methods 0.000 description 19
- 239000004568 cement Substances 0.000 description 13
- 239000002689 soil Substances 0.000 description 13
- 239000010410 layer Substances 0.000 description 11
- 238000013461 design Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000002745 absorbent Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000003621 irrigation water Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229940098458 powder spray Drugs 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a non-excavation reinforcing structure of a collapsible loess subgrade of an urban road, belongs to the field of urban road engineering, and solves the problems of pavement settlement, cracking, collapse and other diseases caused by the unstable settlement of the collapsible loess subgrade of the established urban road due to the water immersion of the subgrade. According to the utility model, the two sides of the roadbed disease area are provided with the seepage-proof curtains, the positions between the seepage-proof curtains on the two sides are provided with the jet grouting pile reinforcing bodies and the powder grouting pile reinforcing bodies, the jet grouting pile reinforcing bodies and the powder grouting pile reinforcing bodies are alternately arranged at intervals, and the jet grouting pile reinforcing bodies are positioned below the pavement wheel track. Aiming at the characteristics of collapsible loess subgrade road diseases and urban road traffic characteristics, the utility model thoroughly solves the problem of the collapsible loess subgrade diseases of the established urban road through the combined reinforcing structure, and the roadbed is reinforced through the jet grouting pile reinforcement body and the powder jet grouting pile reinforcement body, so that the excavation construction of the road is avoided, and the traffic influence is reduced.
Description
Technical Field
The utility model belongs to the field of urban road engineering, and particularly relates to a non-excavation reinforcing structure for a collapsible loess subgrade of an urban road.
Background
Collapsible loess has the characteristics of porous structure, inside big hole, and the internal structure is destroyed easily after meeting water, intensity reduces, causes collapsible deformation. Collapsible loess belongs to bad geological conditions, and the road constructed in the collapsible loess area is easy to generate roadbed subsidence deformation after soaking, and the service quality and service life of the road are seriously affected. The subgrade subsidence deformation disease is more common and serious in the urban road operation period constructed in the collapsible loess area, on one hand, the green belt is arranged in the urban road subgrade range, and the greening irrigation water easily invades the subgrade to cause the subgrade subsidence deformation; on the other hand, urban road rainwater ponding is serious than highway, and rainwater is mainly discharged through underground rainwater pipeline, and factors such as pipeline damage, interface fracture cause the rainwater to wash out the road bed easily, lead to the road bed subsides even sink the disease. The collapsible loess subgrade disease of the built urban road not only affects the driving comfort of the road and the service life of the road, but also seriously affects the driving safety due to instability deformation and collapse of the subgrade, and an effective maintenance measure for the collapsible loess subgrade disease of the built urban road is necessary to be provided, so that the driving safety, the comfort and the durability of the road are ensured.
The treatment method of the collapsible loess subgrade mainly comprises the following steps: the existing treatment methods mainly aim at newly constructed roadbeds. The measures such as impact rolling and dynamic compaction are easy to cause disturbance and damage of underground pipelines, the road surface needs to be excavated greatly for a long time to break traffic when the filling cushion layer is replaced, and the method is not suitable for the construction of the built urban roads; chemical grouting can well fill and reinforce local diseases such as collapsible loess cave-in and holes, but can not reinforce the whole roadbed, and in addition, the roadbed diseases can not be thoroughly eliminated due to limited reinforcement depth.
Disclosure of Invention
The utility model aims to provide a non-excavation reinforcing structure for a collapsible loess subgrade of an urban road, which aims to solve the problems of pavement settlement, cracking, collapse and other diseases caused by the collapse of the collapsible loess subgrade of the built urban road due to the unstable sinking of the subgrade in water immersion.
The technical scheme of the utility model is as follows: a non-excavation reinforcing structure of a collapsible loess subgrade of an urban road is characterized in that seepage-proofing curtains are arranged on two sides of a subgrade disease area, jet grouting pile reinforcing bodies and powder grouting pile reinforcing bodies are arranged at positions between the seepage-proofing curtains on two sides, the jet grouting pile reinforcing bodies and the powder grouting pile reinforcing bodies are arranged in a staggered mode at intervals, and the jet grouting pile reinforcing bodies are located below a roadway wheel track.
As a further improvement of the utility model, the jet grouting pile reinforcement extends from the existing road surface to the subgrade bearing layer.
As a further development of the utility model, a impervious curtain is provided under the kerb.
The beneficial effects of the utility model are as follows: aiming at the characteristics of collapsible loess subgrade road diseases and urban road traffic characteristics, the utility model thoroughly solves the problem of the collapsible loess subgrade diseases of the established urban road through the combined reinforcing structure, and the roadbed is reinforced through the jet grouting pile reinforcement body and the powder jet grouting pile reinforcement body, so that the excavation construction of the road is avoided, and the traffic influence is reduced. And a jet grouting pile reinforcing body is arranged at the track of the roadway wheel to bear road traffic load, so that road settlement is avoided, loess holes and cave-in around the pile body are filled with high-pressure slurry, hidden diseases of the roadbed are eliminated, and the strength of the roadbed is improved. The powder spraying pile reinforcing bodies are arranged at the centers of the adjacent rotary spraying pile reinforcing bodies, and the powder spraying pile reinforcing bodies and the rotary spraying pile reinforcing bodies form a composite foundation, so that the overall strength and bearing capacity of the roadbed are improved; the water absorbent resin is doped to continuously absorb the water in the roadbed in the damaged area, so that the purposes of draining the water and eliminating the soft layer of the roadbed are achieved, and the water-absorbing super absorbent resin continuously loses water according to the change condition of the water in the pile body after the cement and lime are hydrated, so that the humidity in the pile body is ensured, the internal maintenance of the pile body is achieved, and the strength of the pile body is improved.
According to the utility model, after the waste slurry generated in the construction process of the jet grouting pile reinforcement is collected, cement, a water reducing agent, a retarder and the like are doped for improvement, so that the jet grouting pile reinforcement is used for anti-seepage curtain construction, an anti-seepage curtain is formed below a curb to separate a green belt from a roadway, and the penetration of greening irrigation water into a roadbed is eliminated from the source. The utility model adopts the non-excavation roadbed reinforcement mode to treat the defects of uneven settlement, deformation, cave-in and the like of the collapsible loess roadbed of the urban road, has obvious roadbed reinforcement effect and has little influence on traffic due to construction.
Drawings
FIG. 1 is a schematic cross-sectional view of a non-excavation reinforcing structure for collapsible loess subgrade of an urban road in accordance with the present utility model;
fig. 2 is a schematic plan view of a non-excavation reinforcing structure of a collapsible loess subgrade for an urban road according to the present utility model.
In the figure: 1-jet grouting pile reinforcement; 2-powder spraying pile reinforcement; 3-impermeable curtains; 4-roadbed disease areas; 5-a roadbed bearing layer; 6-current road surface; 7-a green belt; 8-roadway wheel trace; 9-kerbstone.
Detailed Description
As shown in figures 1 and 2, in the non-excavation reinforcing structure of the collapsible loess subgrade of the urban road, impermeable curtains 3 are arranged on two sides of a subgrade disease area 4, jet grouting pile reinforcing bodies 1 and powder grouting pile reinforcing bodies 2 are arranged at positions between the impermeable curtains 3 on two sides, the jet grouting pile reinforcing bodies 1 and the powder grouting pile reinforcing bodies 2 are alternately arranged at intervals, and the jet grouting pile reinforcing bodies 1 are positioned below roadway wheel tracks 8.
The jet grouting pile reinforcement 1 extends from the current road surface 6 to the roadbed bearing layer 5.
The impermeable curtain 3 is arranged below the curb 9 between the current road surface 6 and the green belt 7.
The construction method comprises the following steps:
A. firstly, detecting the current road surface 6, detecting the road by adopting a drop hammer type deflectometer and a ground penetrating radar, detecting the collapse loess subgrade void, the collapse disease range and the collapse disease depth, and determining the subgrade disease area 4 needing to be reinforced; detecting a pipeline laid under the current pavement 6 by using a geophysical prospecting instrument, and determining the plane position and depth of the pipeline; and determining physical and mechanical parameters such as water content, porosity and the like of the 4-path foundation soil in the subgrade disease area and the subgrade bearing layer 5 in a geological drilling mode.
B. And arranging hole sites of the jet grouting pile reinforcing bodies 1 and the powder grouting pile reinforcing bodies 2, and avoiding and optimally arranging pile bodies with pipeline conflicts according to geophysical prospecting pipeline data. The principle of the pile body avoiding pipeline is as follows: for flexible pipelines such as corrugated pipes, PE pipes and the like, the distance between the edge of the reinforcement body and the edge of the pipeline is not less than 1m; for rigid pipelines such as reinforced concrete pipes, ductile cast iron pipes and the like, the distance between the edge of the reinforcement body and the edge of the pipeline is not less than 0.5m.
C. And (3) rechecking the designed hole site after the arrangement and optimization of the jet grouting pile reinforcing body 1, and performing the construction of the jet grouting pile reinforcing body 1 by adopting a single-pipe method after no errors, and performing the sequential construction from the middle to the periphery of the roadbed defect area 4. The jet grouting pile reinforcing body 1 adopts cement slurry to cut soil mass of the subgrade disease area 4 to reinforce the pile, the cement adopts 42.5 ordinary Portland cement, and the water cement ratio (mass ratio) is 0.8-1.2. Before construction, pile test is carried out to determine the construction process, and the grouting pressure is recommended to be larger than 20MPa, and the lifting speed is 0.2-0.3 m/min. When the pile diameter of the jet grouting pile reinforcing body 1 needs to be enlarged, the pile head is enlarged by increasing the grouting pressure and reducing the speed, and the grouting pressure is recommended to be larger than 30MPa, and the lifting speed is 0.1-0.2 m/min.
D. And constructing the seepage-proof curtain 3 while constructing the jet grouting pile reinforcing body 1. The seepage-proof curtain 3 recommends that the guniting pressure is 20MPa, and the lifting speed is 0.3-m/min to 0.4m/min. Slurry for construction of the seepage-proof curtain 3 is modified and stirred by waste slurry generated by construction of the jet grouting pile reinforcing body 1, and the mass ratio of cement to soil particles to water in the modified slurry is 0.45-0.5:0.1:0.45-0.4. Before construction, waste slurry generated by construction of the jet grouting pile reinforcing body 1 is detected to determine the composition of the waste slurry, and the mixing amount of cement and water is determined according to the designed slurry proportion. The improved slurry for the construction of the impermeable curtain 3 is added with an anti-seepage agent, a water reducing agent and a retarder, the setting time, the fluidity, the pile strength and the anti-seepage performance of the slurry are improved, the mixing amount of the anti-seepage agent is 0.5-1% by mass percent of the slurry, the mixing amount of the water reducing agent is 0.75-1% by mass percent of the slurry, and the mixing amount of the retarder is 0.075-0.15% by mass percent. The initial setting time of the improved slurry is more than 5 hours, and the final setting time is less than 10 hours.
E. And the powder spraying pile reinforcement body 2 is constructed after the construction of the rotary spraying pile reinforcement body 1 and the seepage-proofing curtain 3 is completed for 7 days, the arrangement and optimization of the powder spraying pile reinforcement body 2 are determined, the design hole position is rechecked, a drilling machine is adopted to drill holes to the design depth after errors are avoided, and a drill rod is lifted, sprayed with powder and stirred to form the reinforcement body. In order to ensure that the pile body is uniformly stirred, after the stirring is completed, the drill rod is submerged to the designed depth, and then the pile body is repeatedly stirred and lifted to the pavement. The powder spraying material for the construction of the powder spraying pile reinforcement body 2 is formed by mixing cement, lime, water absorbent resin and soil mass of a roadbed disease area 4, wherein the cement mixing amount is 15-20%, the lime mixing amount is 5-10% and the water absorbent resin mixing amount is 1.5-2% according to the mass percentage of the reinforced soil mass. The ash feeding pressure is 0.4-0.5 MPa, the lifting speed is 0.8-1 m/min when the powder spraying pile reinforcement body 2 is used for powder spraying, and the ash feeding pressure is 0.5MPa and the lifting speed is 0.8m/min when the pile length exceeds 5m.
After the construction of the jet grouting pile reinforcing body 1 and the powder injection pile reinforcing body 2 is completed for 7 days, the redundant pile body of the reinforcing body 20cm below the road surface is chiseled, the concrete is adopted to seal the drilling holes of the jet grouting pile reinforcing body 1 and the powder injection pile reinforcing body 2, the overlay maintenance is carried out after the current road surface 6 is milled and planing the 4cm surface layer, the overlay structure adopts 4cm rubber asphalt concrete, a glass fiber grid is arranged between the overlay layer and the current road surface, and then the curb 9 is installed to open traffic.
The jet grouting pile reinforcing bodies 1 are arranged in a rectangular mode at the positions of the pavement wheel tracks 8; the powder jet grouting pile reinforcement bodies 2 are arranged in rectangular centers formed by the adjacent four jet grouting pile reinforcement bodies 1 and distributed in a plum blossom shape with the adjacent jet grouting pile reinforcement bodies 1; the impervious curtain 3 is positioned below the curb 9 and is formed by overlapping a plurality of jet grouting piles, the center line of the pile body coincides with the side line of the pavement roadway, and the subgrade disease area 4 is separated from the green belt 7.
The pile diameter of the jet grouting pile reinforcing body 1 is 0.4 m-0.8 m, the distance between piles along the road is the distance between the track lines 8 of the pavement wheels (1.6-1.8 m), and the distance between piles along the road is 2-3 times of the pile diameter. The pile diameter and the longitudinal pile spacing of the jet grouting pile reinforcing body 1 are determined according to traffic load, the heavy traffic pile diameter takes a large value, the pile spacing takes a small value, and the light traffic is opposite. When Ne of equivalent axis is less than 400 ten thousand times/lane in the road design reference period, the pile diameter is 0.4m, the transverse pile distance is 1.8m, and the longitudinal pile diameter is 3 times of the pile diameter; when Ne is more than 2500 thousands times per lane in the accumulated equivalent axis time in the road design reference period, the pile diameter is 0.8m, the transverse pile spacing is 1.6m, and the longitudinal pile spacing is 2 times of the pile diameter; when the accumulated equivalent axis times are 400 to ten thousand times/lane to Ne to 2500 ten thousand times/lane in the road design reference period, the pile diameter and the pile distance are determined according to the practical situation by the interpolation method according to the principle. The pile length of the jet grouting pile reinforcing body 1 is determined to penetrate through the roadbed bearing layer 5 and penetrate deep into the roadbed bearing layer by 1m; when the pile length exceeds 15m, the pile head is required to be enlarged by 15m, but the pile diameter is 2 times of the normal pile diameter after the pile head is enlarged by 5m.
The pile diameter of the powder spraying pile reinforcement body 2 is 0.4-0.6 m, and the pile distance is determined according to the position of the jet grouting pile reinforcement body 1. The size of the pile diameter of the powder spraying pile reinforcement body 2 is determined according to the traffic load of the road, and when the accumulated equivalent axis Ne is less than 400 ten thousand times/lane in the road design reference period, the pile diameter of the powder spraying pile reinforcement body 2 is 0.4m; when the accumulated equivalent axis Ne is more than 2500 ten thousand times per lane in the road design reference period, the pile diameter of the powder spraying pile reinforcement body 2 is 0.6m; when the accumulated equivalent axial times are 400 to ten thousand times/lane to Ne to 2500 ten thousand times/lane in the road design reference period, the pile diameter of the powder spray pile reinforcement body 2 is 0.5m. The pile length of the powder spraying pile reinforcement body 2 is 5-10 m, and the pile length is determined according to the water content of the soil body of the collapsible loess subgrade disease area 4, and the pile length is determined based on the condition that the pile enters a soil layer with the water content less than 20%.
The seepage-proof curtain 3 is formed by overlapping a plurality of jet grouting piles, the seepage-proof curtain 3 adopts the jet grouting piles with the pile diameter of 0.5m, the overlapping length between the jet grouting piles is 15cm, the pile length of the seepage-proof curtain 3 is 2-7 m, the seepage-proof curtain is determined according to the water content of soil body in the collapsible loess subgrade disease area 4, the seepage-proof curtain is based on the condition that the seepage-proof curtain enters a soil layer with the water content of less than 20%, and the pile length is 7m when the depth exceeds 7m.
The jet grouting pile reinforcing body 1 adopts cement slurry to cut soil mass of the subgrade disease area 4 to reinforce the pile, and the strength of the pile body 28d is more than or equal to 10MPa.
Waste slurry generated during construction of the jet grouting pile reinforcing body 1 is collected through a recovery device, the waste slurry is diluted by adding water and then pumped to a filtering sedimentation tank, the filtering sedimentation tank filters and sediments particles with the particle size larger than 0.1mm in the waste slurry, the waste slurry is conveyed to a mortar stirring device, cement, an impervious agent, a water reducing agent and a retarder are added for improved stirring, and recycled slurry is formed by improvement and stirring and is used as slurry of the impervious curtain 3. Pile 28d of impermeable curtain 3 has no lateral strength not less than 2MPa and impermeability not more than 1×10 -6 cm/s。
The powder spraying pile reinforcement 2 is formed by stirring cement, lime, super absorbent resin and the soil body of the subgrade defect area 4, cement and lime are doped to improve the soil body of the subgrade defect area 4, the strength and bearing capacity of the subgrade are improved, and the water absorbent resin is doped to continuously absorb the moisture of the soil body in the subgrade defect area 4, drain the moisture, improve the humidity of the subgrade and eliminate the weak subgrade. Pile body 28d of powder spraying pile reinforcement body 2 has no lateral strength not less than 5MPa
The utility model adopts the non-excavation roadbed reinforcement mode to treat the defects of uneven settlement, deformation, cave-in and the like of the collapsible loess roadbed of the urban road, has obvious roadbed reinforcement effect and has little influence on traffic due to construction.
Claims (3)
1. Non-excavation reinforced structure of urban road collapsibility loess road bed, its characterized in that: the two sides of the roadbed disease area (4) are provided with seepage-proof curtains (3), a jet grouting pile reinforcing body (1) and a powder grouting pile reinforcing body (2) are arranged at positions between the seepage-proof curtains (3) at two sides, the jet grouting pile reinforcing body (1) and the powder grouting pile reinforcing body (2) are arranged at intervals in a staggered mode, and the jet grouting pile reinforcing body (1) is located below a roadway wheel track (8).
2. The urban road collapsible loess subgrade trenchless reinforcing structure as defined in claim 1, wherein: the jet grouting pile reinforcing body (1) extends from the current road surface (6) to the roadbed bearing layer (5).
3. The urban road collapsible loess subgrade trenchless reinforcing structure as set forth in claim 1 or 2, wherein: the impermeable curtain (3) is arranged below the curb (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321380984.1U CN219951578U (en) | 2023-06-01 | 2023-06-01 | Non-excavation reinforced structure of urban road collapsibility loess road bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321380984.1U CN219951578U (en) | 2023-06-01 | 2023-06-01 | Non-excavation reinforced structure of urban road collapsibility loess road bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219951578U true CN219951578U (en) | 2023-11-03 |
Family
ID=88540796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321380984.1U Active CN219951578U (en) | 2023-06-01 | 2023-06-01 | Non-excavation reinforced structure of urban road collapsibility loess road bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219951578U (en) |
-
2023
- 2023-06-01 CN CN202321380984.1U patent/CN219951578U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204059124U (en) | A kind of sand drain strong rammer grouting behind shaft or drift lining foundation reinforcing structure | |
| CN108547641B (en) | Substrate reinforcing system of heavy-duty railway tunnel in water-rich weak stratum and construction method thereof | |
| CN102071607A (en) | Railroad bed repair method without affecting existing running conditions | |
| CN101634143A (en) | Method for treating spiral oil-extruding filling pile composite foundation in stratum containing soft clay | |
| CN105696427A (en) | Construction method for reinforcing newly-built railway karst foundation and roadbed structure thereof | |
| CN109797769B (en) | Collapsible loess area underground comprehensive pipe gallery foundation structure and construction method thereof | |
| CN107905811B (en) | Inverted arch-free lining of foundation hollow longitudinal beam bearing arch structure | |
| CN106592608A (en) | Differential settlement control method for new foundation and old roadbed of utility tunnel | |
| CN110965416B (en) | Bamboo reinforcement system for reinforcing mountain area high-fill roadbed and construction method | |
| CN109914240B (en) | Construction method for treating bump at bridge head by polyurethane high polymer grouting under traffic conditions | |
| CN104358196B (en) | Highway open to traffic Embankment Subsidence disposes the construction method of structure | |
| CN110924254A (en) | Construction process for filling carbonaceous shale roadbed | |
| CN102839683B (en) | Granular pile-permeable concrete stake dual compound foundation and processing method | |
| CN210797316U (en) | Box culvert construction structure on soft foundation | |
| CN210529400U (en) | Solidified building residue soil road structure | |
| CN112627168A (en) | High-density polymer grouting reinforcement method for roadbed at sunken part of bridge and culvert butt strap | |
| CN219951578U (en) | Non-excavation reinforced structure of urban road collapsibility loess road bed | |
| CN208455387U (en) | Mountain highway, which is filled out, digs intersection road structure | |
| CN216040465U (en) | Ecological roadbed structure in sponge city based on original road | |
| CN215976663U (en) | Excavation area composite foundation treatment structure crossing under high-voltage line | |
| CN113818300B (en) | Sponge city ecological roadbed structure based on original road and construction method thereof | |
| CN114109394B (en) | Method for determining pile length of tunnel shallow-buried weak surrounding rock high-pressure jet grouting pile method ground surface reinforcement | |
| CN116657452A (en) | Non-excavation reinforcing structure and method for collapsible loess subgrade of urban road | |
| CN114657851A (en) | Roadbed disposal method for river pond area crossing | |
| CN210946876U (en) | Barricade reinforced structure convenient to road surface is widened |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |