CN115404734B - Ecological restoration method for partial collapse of high-fill road - Google Patents
Ecological restoration method for partial collapse of high-fill road Download PDFInfo
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- CN115404734B CN115404734B CN202211212992.5A CN202211212992A CN115404734B CN 115404734 B CN115404734 B CN 115404734B CN 202211212992 A CN202211212992 A CN 202211212992A CN 115404734 B CN115404734 B CN 115404734B
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- grouting
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- ecological restoration
- restoration method
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000002689 soil Substances 0.000 claims abstract description 28
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 238000009966 trimming Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses an ecological restoration method for partial collapse of a high-fill road, which comprises the following steps: s01, adopting first vertical pipe grouting and first transverse pipe grouting to carry out temporary support on a collapsed surface of an original road, adopting second vertical pipe grouting and second transverse pipe grouting to carry out temporary support on a far end of an uncollapsed high-fill roadbed, and fastening a stepped light retaining wall with an original foundation through a vertical prestress anchor rod at a boundary line position of the original road; s02, trimming the collapsed surface of the original road into a ladder shape; s03, sequentially filling wall back layered filling soil, EPS light backfill layer and permeable concrete layer from bottom to top between the stepped light retaining wall and the collapse surface of the original road. The method solves the problems that the engineering quantity is large, secondary disasters are easy to occur when the foundation 7 is disturbed greatly and the manufacturing cost is high when the high-fill collapsed road is repaired in the prior art.
Description
Technical Field
The invention relates to an ecological restoration method for partial collapse of a high-fill road, and belongs to the technical field of geotechnical engineering.
Background
The traffic engineering construction of roads, railways and the like in China is developed at a high speed in more than thirty years, especially in western mountain areas. The road is suitable for the requirement of road overall alignment, a lot of high embankment and high cutting roads appear, the earthquake action of local areas and the scouring of local extra-large rainfall can cause the road collapse of the high-fill embankment, and once the road collapses, the road is not only unsmooth in traffic, but also serious life and property loss can be caused.
The height of the side slope of the high embankment reaches more than ten meters or more, the conventional middle and small retaining wall cannot meet the design requirements, the anti-slip retaining wall is adopted for treatment, the pile length and the embedding depth of the anti-slip pile are required to be very high due to the fact that the filling soil is too high and the body quantity is too large, the engineering cost is too high, and further secondary disasters are easy to generate due to the fact that large-scale excavation is needed for foundation construction of the anti-slip pile hole and the retaining wall. The prestressed anchor cable supporting technical engineering is adopted, the cost is relatively low, but the high-filling soil slope mainly adopts backfill soil, and sufficient strength cannot be provided between the filling soil and the grouting body. Some landslide road sections have strict requirements on construction red lines, do not have continuous slope releasing conditions, and simultaneously have the same requirement on processing landslide soil bodies on a large amount of manpower and material resources. The restoration method is urgently needed to fully utilize the existing soil body, restore the original appearance, remarkably improve the safety coefficient of the side slope and achieve certain economical efficiency.
Disclosure of Invention
The invention aims to solve the technical problems that: an ecological restoration method for partial collapse of a high-fill road is provided to overcome the defects of the prior art.
The technical scheme of the invention is as follows: an ecological restoration method for high fill road partial collapse, the method comprising the steps of:
s01, adopting first vertical pipe grouting and first transverse pipe grouting to carry out temporary support on a collapsed surface of an original road, adopting second vertical pipe grouting and second transverse pipe grouting to carry out temporary support on a far end of an uncollapsed high-fill roadbed, and fastening a stepped light retaining wall with an original foundation through a vertical prestress anchor rod at a boundary line position of the original road;
s02, trimming the collapsed surface of the original road into a ladder shape;
s03, sequentially filling wall back layered filling soil, EPS light backfill layer and permeable concrete layer from bottom to top between the stepped light retaining wall and the collapse surface of the original road.
Further, the first vertical flower pipe, the first transverse flower pipe, the second vertical flower pipe and the second transverse flower pipe are Q235 grade phi 42 multiplied by 3.5mm steel pipes, sleeve connection is adopted for steel pipe connection, drill pipe pore forming is adopted for anchor pipes, pressure grouting is adopted for the anchor pipes, grouting materials are reinforced by slurry with cement as a main agent, secondary splitting grouting is adopted for the anchor pipes, and grouting pressure is controlled to be 1.2 MPa-1.5 MPa.
Further, the stepped light retaining wall, the layered earth filling of the wall back and the non-collapsed high-fill roadbed are fastened through first vertical pipe grouting and first transverse pipe grouting.
Further, the second vertical pipe-line grouting and the second horizontal pipe-line grouting adopt a repeated grouting method to form a miniature pile body with the pile diameter of 300-400 mm, and the steel pipe is left in the pile body to serve as a reinforcement body.
Further, the stepped light retaining wall comprises a foundation and a wall body, wherein the foundation is poured by adopting C30 reinforced concrete, the thickness is 30cm, and a phi 8@10cm multiplied by 10cm reinforcing steel mesh is arranged at 1/2 position in the plate; and (5) pouring the wall body layer by layer.
Further, the stepped lightweight retaining wall material comprises concrete without coarse aggregate and foaming agent, and the foam lightweight soil has a volume weight of 8kN/m 3 The compressive strength of the cube is not less than 1.5MPa.
Further, drain holes with the diameter of 100mm are preset in the wall body, and the drain holes penetrate through the left wall body and the right wall body.
Further, the filler of the wall back layered filling is compacted medium-density to compact crushed stone soil; the thickness of the EPS light backfill layer is greater than 50cm.
Further, the permeable concrete layer is connected with the non-collapsed high-fill roadbed through steel bars, and the longitudinal distance is 30cm, so that an integral pavement is formed.
Further, greening geocells are arranged on the step upper surface of the step-shaped light retaining wall, and planting soil is filled in the greening geocells.
The beneficial effects of the invention are as follows: compared with the prior art, the invention uses the pipe for grouting to quickly concrete the temporary landslide, then uses the ladder-type light retaining wall to enclose, and the extrusion of the ladder-type light retaining wall to the foundation is reduced, so that a vertical prestress anchor rod can be used without using an anti-slide pile, the scheme basically has no disturbance foundation, the construction is safe and reliable, in addition, the dosage of the ladder-type light retaining wall is small and the manufacturing cost is lower because no anti-slide pile hole is required to be punched;
the invention trims the collapse surface of the original road into a ladder shape, and the ladder shape is helpful for ensuring the organic occlusion stability of the new filled soil and the original soil.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
According to the ecological restoration method for the high-fill road partial collapse, the problems that in the prior art, when a high-fill collapsed road is restored, engineering quantity is large, secondary disasters are prone to being generated due to large disturbance to a foundation 7, and manufacturing cost is high are solved, and the ecological restoration method has the advantages that when the high-fill collapsed road is restored, engineering quantity is smaller, secondary disasters are not prone to being generated due to small disturbance to the foundation 7, and manufacturing cost is lower.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1, an ecological restoration method for partial collapse of a high-fill road, the method comprising the steps of:
s01, performing temporary support by adopting grouting of a first vertical pipe 4-1 and grouting of a first transverse pipe 5 on a collapsed surface 3 of an original road 1, performing temporary support by adopting grouting of a second vertical pipe 4-2 and grouting of a second transverse pipe 5-1 on the far end of an uncollapsed high-fill roadbed 2, and fastening a stepped light retaining wall 6 with an original foundation through a vertical prestress anchor rod 11 at the boundary line position of the original road 1;
s02, trimming the collapsed surface 3 of the original road 1 into a ladder shape;
s03, sequentially filling wall back layered filling soil 17, EPS light backfill layer 12 and permeable concrete layer 13 between the stepped light retaining wall 6 and the collapse surface 3 of the original road 1 from bottom to top.
The temporary landslide is quickly solidified by using the pipe grouting, then the stepped light retaining wall 6 is used for enclosing, the extrusion of the stepped light retaining wall 6 to the foundation 7 is reduced, so that the vertical prestressed anchor rods 11 can be used without using the slide piles, the foundation 7 is basically not disturbed, the construction is safe and reliable, in addition, the dosage of the stepped light retaining wall 6 is small because no slide pile holes are required to be drilled, and the manufacturing cost is lower;
the collapsed surface 3 of the original road 1 is trimmed into a ladder shape, and the ladder shape is helpful for ensuring the organic occlusion stability of the new filled soil and the original soil.
In order to ensure grouting fullness and fixation strength of temporary landslide, in this embodiment, further, the first vertical flowtube 4-1, the first transverse flowtube 5, the second vertical flowtube 4-2 and the second transverse flowtube 5-1 adopt Q235 grade phi 42 multiplied by 3.5mm steel pipes, the steel pipes are connected by sleeves, the anchor pipe adopts drill pipe hole forming, steel pipe pressure grouting is adopted, grouting materials adopt slurry reinforcement with cement as a main agent, the anchor pipe adopts a secondary splitting grouting mode, and grouting pressure is controlled to be 1.2 MPa-1.5 MPa.
In order to fix the temporary landslide in the transverse and vertical directions, in this embodiment, further, the stepped light retaining wall 6, the wall back layered soil filling 17 and the non-collapsed high-fill roadbed 2 are fastened by grouting the first vertical flowtube 4-1 and grouting the first transverse flowtube 5.
In order to further enhance the fixing effect on the temporary landslide, stabilize the roadbed landslide, and ensure the safety of subsequent construction, in this embodiment, further, the grouting of the second vertical flowtube 4-2 and the grouting of the second horizontal flowtube 5-1 adopt a multi-time grouting method to form a miniature pile body with the pile diameter of 300-400 mm, and the steel pipe is left in the pile body as a reinforcement body.
Further, the stepped light retaining wall 6 comprises a foundation 7 and a wall body 8, wherein the foundation 7 is poured by adopting C30 reinforced concrete, the thickness is 30cm, and a phi 8@10cm multiplied by 10cm reinforcing steel mesh is arranged at 1/2 position in the plate; and the wall body 8 is poured in layers.
In order to lighten the stepped lightweight retaining wall 6, in this embodiment, further, the stepped lightweight retaining wall 6 comprises concrete without coarse aggregate mixed with foaming agent, and the foam lightweight soil has a volume weight of 8kN/m 3 The compressive strength of the cube is not less than 1.5MPa.
In order to avoid that the retaining wall is extruded and collapsed by water pressure due to water accumulation between the stepped lightweight retaining wall 6 and the collapsed surface 3 of the original road 1, in this embodiment, further, a drain hole 10 with a diameter of 100mm is preset in the wall body 8, and the drain hole 10 penetrates through the wall body 8.
The EPS light backfill layer 12 makes the total weight of the filled soil lighter, can reduce the extrusion force of the filled soil to the stepped light retaining wall 6, and further, the filler of the wall back layered filled soil 17 is compacted medium-density to compact crushed stone soil 9; the EPS light backfill layer 12 has a thickness greater than 50cm.
In order to increase the bonding strength between the permeable concrete layer 13 and the non-collapsed high-fill subgrade 2, in this embodiment, further, the permeable concrete layer 13 is connected with the non-collapsed high-fill subgrade 2 through steel bars 14, and the longitudinal distance is 30cm, so as to form an integral pavement.
In order to increase greening, in this embodiment, further, a greening geocell 15 is disposed on the stepped upper surface of the stepped lightweight retaining wall 6, and planting soil is filled in the greening geocell 15.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (9)
1. An ecological restoration method for partial collapse of a high-fill road, the method comprising the steps of:
s01, performing temporary support by adopting grouting of a first vertical flower pipe (4-1) and grouting of a first transverse flower pipe (5) on a collapsed surface (3) of an original road (1), performing temporary support by adopting grouting of a second vertical flower pipe (4-2) and grouting of a second transverse flower pipe (5-1) at the far end of an uncollapsed high-fill roadbed (2), and fastening a stepped light retaining wall (6) with the original foundation through a vertical prestress anchor rod (11) at the boundary line position of the original road (1);
s02, trimming the collapsed surface (3) of the original road (1) into a ladder shape;
s03, sequentially filling wall back layered filling soil (17), an EPS light backfill layer (12) and a permeable concrete layer (13) between the stepped light retaining wall (6) and the collapse surface (3) of the original road (1) from bottom to top in a layered manner;
the stepped light retaining wall (6), the wall back layered filling soil (17) and the non-collapsed high-fill roadbed (2) are fastened through grouting of the first vertical flower pipes (4-1) and grouting of the first transverse flower pipes (5).
2. The ecological restoration method for partial collapse of high-fill roads according to claim 1, wherein the first vertical flowtube (4-1), the first horizontal flowtube (5), the second vertical flowtube (4-2) and the second horizontal flowtube (5-1) are Q235 grade phi 42 multiplied by 3.5mm steel pipes, the steel pipes are connected by sleeves, the anchor pipes are drilled by drill pipes, the pressure grouting of the steel pipes is adopted, the grouting material is reinforced by cement slurry serving as a main agent, the anchor pipes are subjected to secondary split grouting, and the grouting pressure is controlled to be 1.2-1.5 MPa.
3. The ecological restoration method for partial collapse of high-fill roads according to claim 1, wherein grouting of the second vertical flowtube (4-2) and grouting of the second horizontal flowtube (5-1) are performed by adopting a multi-time grouting method to form a miniature pile body with the pile diameter of 300-400 mm, and the steel pipe is left in the pile body to serve as a reinforcement body.
4. The ecological restoration method for partial collapse of high-fill roads according to claim 1, wherein the stepped light retaining wall (6) comprises a foundation (7) and a wall body (8), wherein the foundation (7) is poured by adopting C30 reinforced concrete, the thickness is 30cm, and a phi 8@10cm multiplied by 10cm reinforcing steel mesh is arranged at 1/2 position in the slab; and the wall body (8) is poured in layers.
5. The ecological restoration method for partial collapse of high fill roads according to claim 4, wherein the stepped lightweight retaining wall (6) material comprises concrete without coarse aggregate mixed with foaming agent, and the foam lightweight soil has a volume weight of 8kN/m 3 The compressive strength of the cube is not less than 1.5MPa.
6. The ecological restoration method for partial collapse of high fill roads according to claim 4, wherein the wall body (8) is preset with a drain hole (10) of phi 100mm, and the drain hole (10) penetrates through the wall body (8) from the left side to the right side.
7. The ecological restoration method for partial collapse of high-fill roads according to claim 1, characterized in that the filler of the wall back layered filler (17) is compacted medium-dense crushed stone soil (9); the thickness of the EPS light backfill layer (12) is greater than 50cm.
8. The ecological restoration method for partial collapse of high-fill roads according to claim 1, wherein the permeable concrete layer (13) is connected with the non-collapsed high-fill roadbed (2) through steel bars (14) with a longitudinal spacing of 30cm to form an integral road surface.
9. The ecological restoration method for partial collapse of high-fill roads according to claim 6, wherein greening geocells (15) are arranged on the step upper surface of the step-shaped lightweight retaining wall (6), and planting soil is filled in the greening geocells (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211212992.5A CN115404734B (en) | 2022-09-30 | 2022-09-30 | Ecological restoration method for partial collapse of high-fill road |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211212992.5A CN115404734B (en) | 2022-09-30 | 2022-09-30 | Ecological restoration method for partial collapse of high-fill road |
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| Publication Number | Publication Date |
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| CN115404734A CN115404734A (en) | 2022-11-29 |
| CN115404734B true CN115404734B (en) | 2024-03-26 |
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| US7850400B2 (en) * | 2004-11-25 | 2010-12-14 | Freyssinet International (Stup) | Stabilized soil structure and facing elements for its construction |
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2022
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