CN220686095U - Protection retaining structure for landslide roadbed treatment - Google Patents
Protection retaining structure for landslide roadbed treatment Download PDFInfo
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- CN220686095U CN220686095U CN202321687123.8U CN202321687123U CN220686095U CN 220686095 U CN220686095 U CN 220686095U CN 202321687123 U CN202321687123 U CN 202321687123U CN 220686095 U CN220686095 U CN 220686095U
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- steel
- pipe
- flower pipe
- steel flower
- landslide
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 130
- 239000010959 steel Substances 0.000 claims abstract description 130
- 239000004568 cement Substances 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002689 soil Substances 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000002791 soaking Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
A protection retaining structure for landslide roadbed treatment comprises a steel flower pipe, a bearing platform, a balance weight type road shoulder wall and a water drainage structure, wherein ribbed steel bars are arranged in the steel flower pipe, the bottom of the steel flower pipe is conical, and the top of the steel flower pipe stretches into the bearing platform; the top end of the inner part of the steel flower pipe is provided with a limit buckle; the limiting buckle centers and fixes the ribbed steel bar set through the rotating screw; the steel flower pipe is spirally provided with a slurry outlet along the radial direction of the pipe wall; cement slurry is poured into the steel flower pipe holes and the steel flower pipe; the upper part of the bearing platform is provided with a balance weight type road shoulder wall; a water drainage structure is arranged between the balance weight type road shoulder wall and the road surface structural body. The utility model can protect and support the roadbed body which is collapsed by the side slope caused by long-term soaking of rainwater, and effectively improves the safety and stability of the landslide road matrix structure.
Description
Technical Field
The utility model belongs to the technical field of roadbed slope protection support and blocking, and particularly relates to a landslide roadbed steel flower pipe hole bearing platform shoulder wall protection support and blocking structure.
Background
Landslide subgrade is a common type of geological disaster and forms a serious threat to the safety and reliability of roads and transportation systems. In recent years, grouting steel pipe technology is increasingly widely applied to roadbed slope protection supports. The steel pattern pipe hole is a technology combining a steel pipe and a grouting body, cement slurry is filled into the steel pattern pipe by adopting pressure, and the cement slurry is permeated into surrounding soil body through slurry outlet Kong Pilie on the steel pattern pipe hole, fills up soil body cracks and is fully mixed with the soil body, so that a composite pile body is formed.
One is published patent number CN215594041U, designed a steel flower pipe hole envelope suitable for upper soft lower hard stratum, with the main muscle of steel flower pipe interpolation stretching out the steel flower pipe and buckling to the horizontal direction at steel flower pipe top, nevertheless in actual construction process, the inside main muscle of inserting steel flower pipe often leans on steel flower pipe hole inner wall by the influence of job site uncontrollable factor, perhaps center point position offset distance is great, causes the main muscle to bear eccentric load in the atress process, and main muscle atress is uneven, very easily appears extreme stress state.
Disclosure of Invention
In order to solve the problems, the utility model provides a protection retaining structure for treating landslide roadbed.
The protection retaining structure is arranged in a roadbed where a landslide appears and is characterized by comprising a steel flower pipe hole, a bearing platform, a counter weight type road shoulder wall and a water drainage structure, wherein at least two rows of steel flower pipe holes which are arranged in a quincuncial shape are arranged at the edge of a foundation pit, the steel flower pipe is placed in the middle position in the steel flower pipe hole, the bottom end of the steel flower pipe is a conical end head, a slurry outlet is spirally formed in the pipe wall of the steel flower pipe along the pipe axis direction, a limit buckle is arranged at the top end in the steel flower pipe, the limit buckle consists of a PVC plastic ring and a limit screw, a quincuncial steel bar hole is formed in the middle of the PVC plastic ring, at least three screw holes corresponding to the steel bar hole are formed in the side face of the PVC plastic ring, the limit screw is arranged in the screw holes and fixes the limit buckle in the steel flower pipe, ribbed steel bars which are matched with the lengths of the steel flower pipe are inserted into the steel flower pipe through the steel bar holes and are limited in the middle position by the limit buckle, and the cement is poured in the steel flower pipe and the steel flower pipe hole, and the cement is formed;
the top of the steel flower pipe extends into the bearing platform, the bearing platform is transversely poured below the rock soil layer, a vertical balance weight type road shoulder wall is poured above the bearing platform, and a water drainage structure is arranged at the part above the rock soil boundary of the balance weight type road shoulder wall.
The drainage structure comprises a drainage pipe, geotechnical cloth and a permeable gravel layer, wherein the drainage pipe is layered and provided with a plurality of rows, the drainage pipe transversely penetrates through the balance weight type road shoulder wall, the tail end of the drainage pipe is communicated with the permeable gravel layer, the permeable gravel layer is arranged between the balance weight type road shoulder wall and the pavement structure, and the permeable gravel layer is wrapped by the geotechnical cloth.
The pulp outlet interval is 0.15m, and the aperture is 8mm.
The number of the arranged rows of the steel flower pipe holes is three, and the horizontal and longitudinal spacing is 0.75m.
The distance between the edge of the bearing platform and the center of the outermost row of steel flower pipe holes is 50cm.
And a settlement joint is arranged between the bearing platform and the balance weight type road shoulder wall.
The utility model has the beneficial effects that:
(1) The limiting buckle can ensure the centering position of the ribbed steel bar set in the steel flower pipe hole through the adjustment of the rotating screw, and the accurate positioning ensures the accurate relative position between the steel bar and the steel flower pipe, and avoids the structural unbalance and deformation caused by position deviation.
(2) The design of spacing buckle has strengthened the whole stability of landslide road bed department protection retaining structure effectively, through guaranteeing even atress and the accurate position of ribbed steel bar group, and the structure can bear external load and geological variation's influence better, has provided reliable protection support.
(3) The steel pattern pipe hole has the characteristics of small pile diameter, large slenderness ratio, friction force transmission by the pile body, bearing bending and tensile stress and the like, is particularly suitable for the working conditions of narrow field, difficult access and poor environment and working condition, has the characteristics of quick construction, low construction noise, small disturbance to soil layers and few restricted factors, and is suitable for various foundation rescue and reinforcement and roadbed slope stabilization and reinforcement projects.
(4) The structure can protect and support roadbed bodies which collapse side slopes due to long-term soaking of rainwater, and effectively improves safety and stability of landslide road matrix structures.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a plan view of a steel manifold aperture of the present utility model.
Fig. 3 is a schematic cross-sectional view of a steel manifold hole of the present utility model.
Fig. 4 is a schematic structural view of a centering limiting buckle of the present utility model.
Fig. 5 is a schematic view showing the disassembly of the steel pipe hole of the utility model.
Wherein: 1-steel pattern pipe hole, 2-steel pattern pipe, 3-bearing platform, 4-balance weight type road shoulder wall, 5-road surface, 6-water drainage structure, 61-water drainage pipe, 62-geotextile, 63-permeable crushed stone layer, 7-limit buckle, 71-PVC plastic ring, 72-limit screw, 8-ribbed steel bar, 9-grout outlet, 10-inner cement, 11-outer cement and 12-settlement joint.
Detailed Description
The subsidence of a certain roadbed causes the structural damage of the road surface, obvious arc-shaped cracks appear, the through development of the cracks and the cyclic reciprocating action of the vehicle load form local pits on the road surface, the driving experience is seriously affected, and the whole-width roadbed deformation completely damages the asphalt road surface. The pavement subsidence area affects the length of the pavement by about 75m, the width of the pavement has affected the whole pavement, obvious arc-shaped cracks are formed, the inner side and the outer side of the cracks form staggered ridges larger than 25cm, the cracks are intermittently communicated and developed, and the local cracks are provided with additional paving repairing marks. The subgrade slope collapses to a height of about 8m, so that an obvious landslide body is formed, and the inner side ditch is blocked by the collapse body, so that the drainage function is completely lost. The sinking roadbed is repaired by using a protection retaining structure at the landslide roadbed, and the concrete structure and construction steps are as follows:
s1-manufacturing a steel floral tube 2: by adopting the seamless steel tube, the inner and outer surfaces of the steel tube have no visible cracks, rolling and separation layers. 3 vertical seams are uniformly cut along the circumference of the steel pipe within the length of 10cm at the bottom of the steel pipe, and the steel pipe is pricked into a conical end. The steel pipe is drilled with a slurry outlet 9 with the diameter of 8mm at a distance of less than 1.4m along the axis direction of the steel pipe every 0.15m, the slurry outlet 9 is spirally arranged along the wall of the steel pipe, and the slurry outlet 9 is sealed by a special adhesive tape or gel so as to ensure that cement paste does not enter the steel pipe 2 after one-time grouting. The whole steel pipe 2 is arranged in a full length mode, and the length of the steel pipe is calculated according to the bearing capacity requirement of the foundation.
S2-drilling steel flower pipe holes 1: in order to ensure that the steel pipe 2 can be smoothly lowered into the steel pipe hole 1 for installation, a drill bit with the diameter of 130mm is arranged, the drill is used for sequentially drilling holes from the right side to the left side of a primary platform of a sinking roadbed slope, three rows of steel pipe holes which are arranged in a plum blossom shape are drilled, and the longitudinal and transverse hole intervals are 0.75m. In the drilling process, stratum crushing, hole collapse, air leakage or drill sticking and other phenomena exist, the mud is used for protecting the wall to drill the hole, mud is injected into the steel flower pipe hole 1, a layer of clay film is formed in the steel flower pipe hole 1 by the mud, the clay film is tightly contacted with the wall surface of the steel flower pipe hole 1, support and stability are provided through the viscosity effect, and the collapse of the drilling hole is prevented.
S3-primary grouting: after the steel flower pipe hole 1 is drilled, grouting is carried out once, a grouting pipe is placed at the bottom of the steel flower pipe pile drilling hole, a certain grouting pressure is applied, the grouting pressure is generally 0.2-0.5 MPa, cement slurry starts to fill the steel flower pipe hole 1 from the bottom, slurry in the steel flower pipe hole 1 is discharged, the slurry is fully discharged until the slurry is discharged, the grouting material adopts pure cement slurry prepared by P.O42.5-grade cement, the ratio of the cement to water is 1:0.5, and an early strength high-efficiency water reducing agent with the mass of 2% of cement is doped.
S4-lower steel flower pipe 2: after the first grouting is finished, the steel flowtube 2 is put into the steel flowtube hole 1 in time before cement is solidified, the steel flowtube 2 is suspended firstly, after the steel flowtube 2 is aligned with the opening of the steel flowtube hole 1, the steel flowtube 2 is vertically put into the pore canal of the steel flowtube hole 1, and no deflection or impact of the pore canal occurs in the placing process. And (5) observing the slurry seepage condition after the steel flower pipe 2 is lowered, and supplementing slurry for a plurality of times at the opening of the steel flower pipe hole 1 after the slurry seepage.
S5-secondary splitting grouting: and (3) after 5-12 h of the first grouting interval, performing secondary split grouting, wherein the secondary split grouting pressure is 2.0-3.0 MPa, and the ratio of the secondary split grouting cement to water is 1: and 0.6-0.8, the grouting pipe is used for splitting grouting in sections, the steel pipe 2 is used as a grouting pipe for secondary splitting grouting, and the cement stone body for the first grouting is split, the slurry is spread to the periphery to strengthen the rock mass, so that the rock stratum and the steel pipe 2 form an integral body which is effectively connected.
S6, lowering ribbed steel bars 8: and after the secondary splitting grouting is finished, immediately lowering the ribbed steel bar 8 before cement solidification, and suspending the lengthened and welded ribbed steel bar 8, wherein uneven stress bending of the ribbed steel bar 8 is avoided in the suspending process. After aligning the ribbed steel bar 8 with the mouth of the steel flowtube 2, slowly placing the ribbed steel bar 8 bottom into the conical end of the bottom of the steel flowtube 2, so that the ribbed steel bar 8 is in a central position in the steel flowtube 2. At this time, two layers of cement grouting are formed, inner cement 10 is formed in the steel flower pipe, outer cement 11 is formed between the foreign-language steel flower pipe holes 1 of the steel flower pipe 2, after the ribbed steel bars 8 are put down, if cement slurry in the steel flower pipe 2 falls back, slurry supplementing is carried out immediately,
s7-mounting limiting buckle 7: after the ribbed steel bar 8 is lowered in place, a limit buckle 7 is arranged at the top of the ribbed steel bar, the limit buckle 7 consists of a PVC plastic ring 71 and a limit screw 72, the PVC plastic ring 71 is provided with a quincuncial steel bar hole in the middle, and the ribbed steel bar is arranged in the steel bar hole of the PVC plastic ring 71; three screw holes corresponding to the positions of the reinforcing steel bar holes are formed in the side face of the PVC plastic ring 71, the limiting screws 72 are arranged in the screw holes, the ribbed reinforcing steel bars 8 are located at the central positions relative to the limiting buckles 7 and are mutually fastened by rotating the three limiting screws 72, the limiting buckles 7 are arranged at the pipe orifice at the top of the steel pipe 2, and the cement paste can be taken down after solidification reaches the design strength and can be reused.
S8-pouring a bearing platform 3 and a balance weight type road shoulder wall 4: after the construction of all the steel floral tubes 2 is completed, a transverse bearing platform 3 is poured above the steel floral tubes 2 to be constructed, and the distance between the center of the outermost row of steel floral tubes 2 and the edge of the bearing platform is 50cm; and pouring a balance weight type shoulder wall 4 above the bearing platform 3, pouring the balance weight type shoulder wall 4 along the edge of the pavement 5 at the side ditch of the inner side of the sinking roadbed, and setting a settlement joint 12 at the joint of the bearing platform 3 and the balance weight type shoulder wall 4.
S9, arranging a water drainage structure 6: the drainage structure 6 is arranged at the part above the rock-soil boundary of the balance weight type road shoulder wall 4, the drainage structure 6 comprises a water drain pipe 61, geotechnical cloth 62 and a permeable gravel layer 63, the water drain pipe 61 is arranged in a layered mode, the water drain pipe 61 transversely penetrates through the balance weight type road shoulder wall 4, the tail end of the water drain pipe 61 is communicated with the permeable gravel layer 63, the permeable gravel layer 63 is arranged between the balance weight type road shoulder wall 4 and the pavement 5, and the permeable gravel layer 63 is wrapped by the geotechnical cloth 62.
Claims (6)
1. The protection retaining structure is arranged along a roadbed side ditch of a landslide, and is characterized by comprising a steel flower pipe hole, a bearing platform, a counter weight type road shoulder wall and a water drainage structure, wherein at least two rows of steel flower pipe holes which are arranged in a quincuncial shape are arranged at the edge of a foundation pit, the steel flower pipe is placed in the middle position of the steel flower pipe hole, the bottom end of the steel flower pipe is a conical end, a slurry outlet is spirally formed in the pipe axis direction on the pipe wall of the steel flower pipe, a limit buckle is mounted at the inner top end of the steel flower pipe and consists of a PVC plastic ring and a limit screw, a quincuncial steel bar hole is formed in the middle of the PVC plastic ring, at least three screw holes corresponding to the steel bar hole are formed in the side face of the PVC plastic ring, the limit screw is arranged in the screw holes, ribbed steel bars matched with the lengths of the steel flower pipe penetrate through the steel bar holes and are inserted into the steel flower pipe and limited in the middle position by the limit buckle, cement is poured in the steel flower pipe and the steel flower pipe hole, so that inner cement and outer cement are formed;
the top of the steel flower pipe extends into the bearing platform, the bearing platform is transversely poured below the rock soil layer, a vertical balance weight type road shoulder wall is poured above the bearing platform, and a water drainage structure is arranged at the part above the rock soil boundary of the balance weight type road shoulder wall.
2. The landslide of claim 1 wherein the drainage structure comprises a plurality of rows of drainage pipes, geotextiles and permeable gravel layers, the drainage pipes are layered and transversely penetrate the balance weight type road shoulder wall, the tail ends of the drainage pipes are communicated with the permeable gravel layers, the permeable gravel layers are arranged between the balance weight type road shoulder wall and the pavement structure, and the permeable gravel layers are wrapped by geotextiles.
3. A landslide subgrade treatment protection retaining structure as claimed in claim 1, wherein said grout outlet is spaced 0.15m and has an aperture of 8mm.
4. The landslide subgrade treatment protection retaining structure of claim 1, wherein the number of arranged rows of steel flower pipe holes is three, and the horizontal and longitudinal spacing is 0.75m.
5. A landslide control structure of claim 1 wherein the distance between the edge of the platform and the center of the outermost row of steel manifold holes is 50cm.
6. A landslide subgrade treatment protection retaining structure as claimed in claim 1, wherein a settlement joint is provided between said abutment and a counter-balanced shoulder wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321687123.8U CN220686095U (en) | 2023-06-29 | 2023-06-29 | Protection retaining structure for landslide roadbed treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321687123.8U CN220686095U (en) | 2023-06-29 | 2023-06-29 | Protection retaining structure for landslide roadbed treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220686095U true CN220686095U (en) | 2024-03-29 |
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ID=90373454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321687123.8U Active CN220686095U (en) | 2023-06-29 | 2023-06-29 | Protection retaining structure for landslide roadbed treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220686095U (en) |
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2023
- 2023-06-29 CN CN202321687123.8U patent/CN220686095U/en active Active
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