CN115404734A - Ecological restoration method for partial collapse of high fill road - Google Patents
Ecological restoration method for partial collapse of high fill road Download PDFInfo
- Publication number
- CN115404734A CN115404734A CN202211212992.5A CN202211212992A CN115404734A CN 115404734 A CN115404734 A CN 115404734A CN 202211212992 A CN202211212992 A CN 202211212992A CN 115404734 A CN115404734 A CN 115404734A
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- grouting
- road
- high fill
- restoration method
- ecological restoration
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 25
- 239000011380 pervious concrete Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000004567 concrete Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- 230000009286 beneficial effect Effects 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
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
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- 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
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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
-
- 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
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- 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
Abstract
The invention discloses an ecological restoration method for partial collapse of a high fill road, which comprises the following steps: s01, performing temporary support on a collapsed surface of an original road by adopting first vertical floral tube grouting and first transverse floral tube grouting, performing temporary support on the far end of a non-collapsed high fill subgrade by adopting second vertical floral tube grouting and second transverse floral tube grouting, and fastening a stepped light retaining wall with an original foundation through a vertical prestressed anchor rod at the boundary position of the original road; s02, finishing the collapsed surface of the original road into a step shape; and S03, sequentially layering filling wall back layered filling soil, EPS light backfill layers and pervious concrete layers from bottom to top between the stepped light retaining wall and the collapsed surface of the original road. The method solves the problems that in the prior art, when a high-fill collapsed road is repaired, the engineering quantity is large, the disturbance to a foundation 7 is large, secondary disasters are easy to generate, and the manufacturing cost is high.
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
In the last thirty years, the construction of highway, railway and other traffic engineering in China is developed at a high speed, especially in western mountainous areas. A lot of high embankments and high cutting roads are generated to meet the overall linear requirement of the road, the earthquake action in local areas and the scouring of local extra-large rainfall cause the road collapse of the high earth filling embankment to happen occasionally, and once the road collapses, the unsmooth traffic is caused, and even serious life and property losses can be caused.
The height of a high embankment side slope reaches more than ten meters or more, the conventional medium and small retaining walls cannot meet the design requirements, anti-sliding and retaining walls are adopted for treatment, the requirements on the pile length and the embedment depth of anti-sliding piles are high due to the fact that soil filling is too high and the volume of anti-sliding piles is too large, so that the construction cost is too high, and further secondary disasters are easy to generate due to the fact that large-scale excavation is needed for constructing anti-sliding pile holes and retaining wall foundations (7). The prestressed anchor cable supporting technical engineering is relatively low in cost, but the high-fill side slope is mainly backfilled soil, and sufficient strength cannot be provided between the backfilled soil and a grouting body. Some collapse road sections have strict requirements on construction red lines, do not have continuous slope releasing conditions, and simultaneously need to consume a large amount of manpower and material resources for treating collapse soil bodies. A repairing method is urgently needed, the existing soil body can be fully utilized, original appearance can be restored, the safety coefficient of the side slope is obviously improved, and meanwhile, the method has certain economical efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the ecological restoration method for partial collapse of the 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 partial collapse of a high fill road, the method comprising the steps of:
s01, performing temporary support on a collapsed surface of an original road by adopting first vertical perforated pipe grouting and first transverse perforated pipe grouting, performing temporary support on the far end of a non-collapsed high fill roadbed by adopting second vertical perforated pipe grouting and second transverse perforated pipe grouting, and fastening the stepped light retaining wall with an original foundation through a vertical prestressed anchor rod at the boundary line position of the original road;
s02, finishing the collapsed surface of the original road into a step shape;
s03, sequentially layering filling wall back layered filling soil, EPS light backfill layers and pervious concrete layers from bottom to top between the stepped light retaining wall and the collapsed surface of the original road.
Furthermore, the first vertical perforated pipe, the first transverse perforated pipe, the second vertical perforated pipe and the second transverse perforated pipe are Q235-grade phi 42 multiplied by 3.5mm steel pipes, the steel pipes are connected by adopting a sleeve, the anchor pipe is formed by drilling holes by adopting a drill pipe, steel pipe pressure grouting is adopted, grouting materials are reinforced by adopting grout taking cement as a main agent, the anchor pipe is subjected to secondary split grouting, and the grouting pressure is controlled to be 1.2 MPa-1.5 MPa.
Furthermore, stepped light retaining wall, wall back layered filling and non-collapsed high fill roadbed are fastened through first vertical floral tube grouting and first horizontal floral tube grouting.
Furthermore, the second vertical perforated pipe grouting and the second horizontal perforated pipe grouting adopt a multiple 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 C30 reinforced concrete, the thickness of the foundation is 30cm, and a reinforcing mesh with the thickness of 8@10cm multiplied by 10cm is arranged at 1/2 position in the plate; and (5) pouring the wall body in layers.
Furthermore, the step-shaped light retaining wall material comprises concrete without coarse aggregateAnd foaming agent, wherein the volume weight of the foamed light soil is 8kN/m 3 The cubic compressive strength is not less than 1.5MPa.
Furthermore, a drain hole with the diameter of 100mm is preset in the wall body and penetrates through the left side and the right side of the wall body.
Furthermore, the filler for filling the layered soil on the back of the wall is compacted medium-density to compact broken stone soil; the thickness of the EPS light backfill layer is more than 50cm.
Furthermore, the pervious concrete layer is connected with the undisrupted pavement through steel bars, and the longitudinal distance is 30cm, so that the whole pavement is formed.
Furthermore, the upper surface of the ladder-shaped light retaining wall is provided with a greening geocell, and planting soil is filled in the greening geocell.
The invention has the beneficial effects that: compared with the prior art, the temporary landslide is quickly consolidated by grouting the perforated pipes, then the stepped light retaining wall is used for retaining, and the extrusion of the stepped light retaining wall on the foundation is reduced, so that the vertical prestressed anchor rods can be used without using the anti-slide piles, the scheme basically has no disturbance on the foundation, the construction is safe and reliable, and in addition, the anti-slide pile holes do not need to be drilled, the dosage of the stepped light retaining wall is small, and the manufacturing cost is lower;
the invention trims the collapsed surface of the original road into the ladder shape, which is beneficial to ensuring the organic occlusion stability of the new filling 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 the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the application solves the problems that in the prior art, when a high fill collapsed road is repaired, the engineering quantity is large, secondary disasters are easily generated due to the fact that 7 foundation disturbances are large, and the manufacturing cost is high, and has the advantages that when the high fill collapsed road is repaired, the engineering quantity is smaller, the 7 foundation disturbances are smaller, the secondary disasters are not easily generated due to the fact that the 7 foundation disturbances are small, and the manufacturing cost is lower.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the detailed description.
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 on a collapsed surface 3 of an original road 1 by adopting first vertical perforated pipes 4-1 and first transverse perforated pipes 5 for grouting, performing temporary support on the far end of a non-collapsed high fill roadbed 2 by adopting second vertical perforated pipes 4-2 and second transverse perforated pipes 5-1 for grouting, and fastening a stepped light retaining wall 6 with an original foundation through vertical prestressed anchor rods 11 at the boundary line position of the original road 1;
s02, finishing the collapsed surface 3 of the original road 1 into a step shape;
s03, sequentially filling the layered filling wall back layered filling soil 17, the EPS light backfill layer 12 and the pervious concrete layer 13 from bottom to top between the stepped light retaining wall 6 and the collapsed surface 3 of the original road 1.
The temporary landslide is quickly solidified by grouting the perforated pipes, then the stepped light retaining wall 6 is used for retaining, the extrusion of the stepped light retaining wall 6 on the foundation 7 is reduced, so that the vertical prestressed anchor rods 11 can be used without using anti-slide piles, the foundation 7 is basically not disturbed by the scheme, the construction is safe and reliable, and in addition, anti-slide pile holes do not need to be drilled, the stepped light retaining wall 6 is small in using amount and lower in manufacturing cost;
the collapsed surface 3 of the original road 1 is trimmed into a step shape, and the step shape is beneficial to ensuring the organic occlusion stability of new filling soil and original soil.
In order to ensure the grouting plumpness and the fixing strength to the temporary landslide, in the embodiment, further, the first vertical floral tube 4-1, the first horizontal floral tube 5, the second vertical floral tube 4-2 and the second horizontal floral tube 5-1 are Q235-grade phi 42 × 3.5mm steel tubes, the steel tubes are connected by a sleeve, the anchor tube is formed by a drill tube, the grouting is performed by steel tube pressure, the grouting material is reinforced by grout taking cement as a main agent, the anchor tube is performed by a secondary split grouting mode, and the grouting pressure is controlled to be 1.2 MPa-1.5 MPa.
In order to fix the temporary landslide in the horizontal and vertical directions, in the embodiment, the stepped lightweight retaining wall 6, the wall back layered filling 17 and the non-collapsed high fill roadbed 2 are further fastened with the first horizontal perforated pipe 5 by grouting the first vertical perforated pipe 4-1.
In order to further enhance the fixing effect on the temporary landslide, stabilize the landslide of the roadbed and ensure the safety of subsequent construction, in the embodiment, the second vertical perforated pipe 4-2 and the second horizontal perforated pipe 5-1 are grouted by multiple grouting methods to form a miniature pile body with a 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 cast by C30 reinforced concrete, the thickness is 30cm, and a reinforcing mesh of phi 8@10cm multiplied by 10cm is arranged at 1/2 position in the plate; the wall body 8 is poured in layers.
In order to lighten the weight of the stepped lightweight retaining wall 6, in this embodiment, the material of the stepped lightweight retaining wall 6 comprises concrete without coarse aggregate, and a foaming agent is blended in the concrete, and the volume weight of the foamed lightweight concrete is 8kN/m 3 The cubic compressive strength is not less than 1.5MPa.
In order to avoid the water accumulation between the stepped lightweight retaining wall 6 and the collapsed surface 3 of the original road 1, which causes the retaining wall to collapse by water pressure extrusion, in this embodiment, 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 enables the total weight of the filled soil to be lighter, can reduce the extrusion force of the filled soil on the stepped light retaining wall 6, and further enables the filler of the wall back layered filled soil 17 to be compacted medium-density to compact broken stone soil 9; the thickness of the EPS light backfill layer 12 is more than 50cm.
In order to increase the bonding strength between the pervious concrete layer 13 and the non-collapsed road surface 2, in the embodiment, further, the pervious concrete layer 13 is connected with the non-collapsed road surface 2 through steel bars 14, and the longitudinal distance is 30cm, so as to form an integral road surface.
In order to increase greening, in the present embodiment, a greening geocell 15 is further disposed on the upper surface of the step 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 specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.
Claims (10)
1. An ecological restoration method for partial collapse of a high fill road, characterized by comprising the steps of:
s01, adopting a first vertical perforated pipe (4-1) and a first transverse perforated pipe (5) to carry out grouting on a collapsed surface (3) of an original road (1), adopting a second vertical perforated pipe (4-2) and a second transverse perforated pipe (5-1) to carry out grouting on the far end of a non-collapsed high fill roadbed (2) to carry out temporary supporting, and fastening a stepped light retaining wall (6) with an original foundation through a vertical prestressed anchor rod (11) at the boundary position of the original road (1);
s02, finishing a collapsed surface (3) of the original road (1) into a step shape;
s03, filling wall back layered filling soil (17), an EPS light backfill layer (12) and a pervious 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 sequence.
2. The ecological restoration method for the partial collapse of the high fill road according to claim 1, wherein the first vertical floral tube (4-1), the first transverse floral tube (5), the second vertical floral tube (4-2) and the second transverse floral tube (5-1) are Q235-grade phi 42 x 3.5mm steel tubes, the steel tubes are connected by a sleeve, the anchor tubes are formed by drilling tubes, the anchor tubes are subjected to pressure grouting by the steel tubes, grouting materials are reinforced by grout taking cement as a main agent, the anchor tubes are subjected to secondary split grouting, and the grouting pressure is controlled to be 1.2 MPa-1.5 MPa.
3. The ecological restoration method for partial collapse of high fill road according to claim 1, wherein the stepped lightweight retaining wall (6), the wall back layered filling soil (17) and the un-collapsed high fill roadbed (2) are fastened with the first horizontal perforated pipe (5) by grouting the first vertical perforated pipe (4-1).
4. The ecological restoration method for partial collapse of high fill road according to claim 1, characterized in that the second vertical perforated pipe (4-2) grouting and the second horizontal perforated pipe (5-1) grouting are performed by multiple grouting methods to form a miniature pile body with a pile diameter of 300-400 mm, and the steel pipe is left in the pile body as a reinforcement body.
5. The ecological restoration method for partial collapse of high fill road according to claim 1, wherein the stepped lightweight retaining wall (6) comprises a foundation (7) and a wall body (8), the foundation (7) is cast by C30 reinforced concrete, the thickness is 30cm, and a reinforcing mesh with the thickness of 8@10cm x 10cm is arranged at 1/2 position in the plate; the wall body (8) is poured in layers.
6. The ecological restoration method for partial collapse of high fill road according to claim 5, wherein the step-type lightweight retaining wall (6) comprises concrete without coarse aggregate mixed with foaming agent, and the volume weight of the foamed lightweight concrete is 8kN/m 3 The cubic compressive strength is not less than 1.5MPa.
7. The ecological restoration method for partial collapse of high fill road according to claim 5, characterized in that the wall body (8) is preset with a drainage hole (10) of phi 100mm, and the drainage hole (10) penetrates the wall body (8) in the left and right directions.
8. The ecological restoration method for partial collapse of high fill road according to claim 1, characterized in that the filler of the wall back layered filling (17) is compacted medium-dense to compacted crushed stone soil (9); the thickness of the EPS light backfill layer (12) is more than 50cm.
9. The ecological restoration method for partial collapse of high fill road according to claim 1, wherein the pervious concrete layer (13) is connected to the un-collapsed road surface (2) by steel bars (14) with a longitudinal spacing of 30cm to form a monolithic road surface.
10. The ecological restoration method for partial collapse of high fill road according to claim 7, wherein a greening geocell (15) is arranged on the upper surface of the step of the stepped lightweight retaining wall (6), and planting soil is filled in the greening geocell (15).
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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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| 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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| CN115404734B CN115404734B (en) | 2024-03-26 |
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2022
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