CN111304988A - Light embankment structure built on high and steep hillside and construction method - Google Patents
Light embankment structure built on high and steep hillside and construction method Download PDFInfo
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- CN111304988A CN111304988A CN201911330501.5A CN201911330501A CN111304988A CN 111304988 A CN111304988 A CN 111304988A CN 201911330501 A CN201911330501 A CN 201911330501A CN 111304988 A CN111304988 A CN 111304988A
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- 238000010276 construction Methods 0.000 title claims abstract description 45
- 239000011435 rock Substances 0.000 claims abstract description 39
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 239000004746 geotextile Substances 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 2
- 230000035515 penetration Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
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- E—FIXED CONSTRUCTIONS
- 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
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
-
- 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
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- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention belongs to the technical field of roadbed engineering, and particularly relates to a light embankment structure built on a high and steep hillside and a construction method. The light embankment structure comprises a lower micro pile anti-sliding support structure, the light embankment structure further comprises an upper light embankment, an anchor rod, a retaining wall and a face wall, the lower micro pile anti-sliding support structure comprises micro piles, a crown beam and a crown beam anchor rod, the micro piles are vertically arranged in the stable rock mass at the lower part of the steep hillside at intervals, a plurality of drain holes are formed in the bottom of the crown beam, the crown beam is arranged at the top of the micro piles, the crown beam and the crown beam anchor rod are of an integral structure formed by cast-in-place reinforced concrete, one end of the anchor rod is arranged in the retaining wall, the other end of the anchor rod is arranged in the stable rock mass, a drainage mattress layer is arranged on the lower side of the light embankment and communicated with the drain holes, steps with an inverse slope are arranged on the lower side of the drainage mattress layer, and the drainage mattress layer is communicated with the drain.
Description
Technical Field
The invention belongs to the technical field of roadbed engineering, and particularly relates to a light embankment structure built on a high and steep hillside and a construction method.
Background
China belongs to mountainous countries, steep slope terrain is the most common landform form in mountainous areas, road engineering is very difficult to construct or the construction cost is high in the mountainous areas, and compared with the construction of bridges and tunnel engineering, the construction investment is relatively low in the construction of roadbed engineering, so that the roadbed engineering is constructed as far as possible under the condition. When a roadbed project is built on a steep slope, a high embankment is often required to be built in a geological unstable section of a high and steep hill slope, the building difficulty is high, the cost is high, and many high embankments collapse after a vehicle is built and communicated; another is to arrange a lower retaining structure on the roadbed, for example, patent No. 201420708432.3 discloses a steep slope light roadbed structure, which comprises reinforcing piles arranged at intervals along the longitudinal direction of the road; the soil blocking plates are arranged on the inner sides of the two adjacent reinforcing piles; the light packing layer is filled on the inner side of the soil retaining plate; the composite geomembrane is laid on the top of the light packing layer; the roadbed surface layer is filled on the composite geomembrane; however, the stress of the structure is mainly applied to the cantilever piles, the piles are easy to overturn under the action of the load of the crane and the earthquake load, and the overturning and collapsing accidents of the reinforcing piles can easily occur after the construction and the traffic is completed.
Disclosure of Invention
In view of the problems raised by the above background art, the present invention is directed to: the light embankment structure built on the high and steep hillside and the construction method are provided, and the main technical route is as follows: adopt miniature stake to use small-size rig to construct, reduce the construction degree of difficulty and cost, through stock increase pile sheet wall antidumping antiskid stability. In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a light embankment structure built on a steep hillside is disclosed, the light embankment is arranged on a stable rock mass of the steep hillside and comprises a lower micro pile anti-sliding support structure, and further comprises a light embankment, an anchor rod, a retaining wall and a facing wall which are arranged on the upper portion, the lower micro pile anti-sliding support structure comprises micro piles, a crown beam and a crown beam anchor rod, the micro piles are vertically arranged in the stable rock mass at the lower portion of the steep hillside at intervals, a plurality of drain holes are formed in the bottom of the crown beam, the crown beam is arranged at the top of the micro piles, the crown beam and the crown beam anchor rod are of an integral structure formed by cast-in-place reinforced concrete, one end of the anchor rod is arranged in the retaining wall, the other end of the anchor rod is arranged in the stable rock mass, a drainage cushion layer is arranged on the lower side of the light embankment and communicated with the drain holes, the drainage mattress layer is communicated with the drainage hole, the retaining wall is arranged on the upper side of the crown beam, the lower portion of the retaining wall and the crown beam reinforced concrete are poured into a whole, the upper portion of the retaining wall and the anchor rod are anchored into a whole, and the facing wall is provided with a facing wall anchor rod.
As a preferable scheme of the invention, the anchor rods are provided with a plurality of anchor rods which are uniformly distributed in a rectangular shape, and the horizontal and vertical distances are 3-5 m. By means of the design, the stress of a single anchor rod can be more uniform.
In a preferable scheme of the invention, the size of the anchor rod and the crown beam anchor rod penetrating into the stable rock mass is not less than 5m, the anchor rod and the crown beam anchor rod are designed to be inclined downwards in the stable rock mass, and the inclination angle α is 15 +/-5 degrees.
In a preferable embodiment of the present invention, a distance between two adjacent drainage holes is 3m to 5 m. The design can enable the water drainage hole to effectively and quickly drain water in the light embankment.
As a preferred scheme of the invention, expansion joints are arranged at the positions of 15 +/-5 m of the retaining wall. Due to the design, the retaining wall can be prevented from causing accidents due to thermal expansion and cold contraction.
In a preferred embodiment of the present invention, the drainage mattress layer is formed by combining geotextile and geomembrane, or by combining a drainage plate and geomembrane. Therefore, the drainage mattress layer has better drainage effect and low manufacturing cost.
As a preferable scheme of the invention, the step and the horizontal plane form a reverse slope included angle gamma, and the reverse slope angle gamma is 5 +/-0.5 degrees. Thus, the anti-sliding stability between the light retaining wall and the mountain step can be enhanced.
A construction method for constructing a light embankment structure on a high and steep hillside comprises a construction method suitable for newly building an embankment and a construction method for repairing a collapsed embankment;
the construction method of the newly-built embankment comprises the following steps:
s1: dividing the whole road into a left road and a right road, excavating a left half-width road of the backer along a designed elevation to form a construction platform with the width of about 5m, and creating conditions for later construction;
s2: the construction of the facing wall, construct the anchor rod of the upper facing wall first, the anchor rod of the facing wall slopes down and enters and stabilizes the rock mass, construct the facing wall again, the anchor rod of the facing wall and facing wall anchor into an organic whole, guarantee the upper side slope safety, offer the condition for lower excavation;
s3: excavating a right half road downwards and finishing the right half road into a step with a reverse slope to form a platform with the width of about 3m, and creating conditions for the construction of the miniature pile;
s4: constructing a miniature pile, wherein the pile bottom of the miniature pile enters the lower part of the high and steep hillside to stabilize a rock mass;
s5: constructing an anchor rod, namely downwards inclining the anchor rod into a stable rock body;
s6: constructing a crown beam, namely connecting a plurality of micro piles and a plurality of crown beam anchor rods into an anti-sliding stable whole through the crown beam, and reserving drain holes at the bottom of the crown beam;
s7: constructing a retaining wall, wherein the retaining wall is a reinforced concrete plate type wall, the lower part of the retaining wall and the crown beam reinforced concrete are cast into a whole, and the upper part of the retaining wall and the anchor rod are anchored into a whole;
s8: paving a drainage mattress layer, wherein the drainage mattress layer is connected with a drainage hole at the bottom of the crown beam;
s9: filling self-compacting flow state stable soil into the vibration-free pumping to manufacture a light embankment;
the construction method for repairing the collapsed embankment comprises the following steps:
s1: the construction and setting-out of the flat site, the excavation and trimming of the area above the landslide surface of the collapse area into steps with reverse slopes form a platform with the width of about 3m, and conditions are created for the construction of the micro-piles;
s2: constructing a miniature pile, wherein the pile bottom of the miniature pile enters the lower part of the high and steep hillside to stabilize a rock mass;
s3: constructing a crown beam anchor rod and an anchor rod, and enabling the crown beam anchor rod and the anchor rod to be inclined downwards to enter a stable rock mass;
s4: constructing a crown beam, namely connecting a plurality of micro piles and a plurality of crown beam anchor rods into an anti-sliding stable whole through the crown beam, and reserving drain holes at the bottom of the crown beam;
s5: constructing a retaining wall, wherein the retaining wall is a reinforced concrete plate type wall, the lower part of the retaining wall and the crown beam reinforced concrete are cast into a whole, and the upper part of the retaining wall and the anchor rod are anchored into a whole;
s6: paving a drainage mattress layer, wherein the drainage mattress layer is connected with a drainage hole at the bottom of the crown beam;
s7: the light embankment is made by filling self-compacting flow stable soil in a vibration-free pumping way.
The invention has the beneficial effects that:
according to the invention, through the structural optimization design, the embankment load is greatly reduced, and the road driving load is directly transmitted to the lower stable rock mass of the high and steep hillside through the upper light embankment, the anchor rod retaining wall and the lower miniature pile anti-sliding support structure, so that the adverse effect on a mountain is reduced, the safety of the embankment is ensured, the construction difficulty and the construction cost are reduced, and the construction period is shortened.
Drawings
The invention is further illustrated by the non-limiting examples given in the accompanying drawings;
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural diagram of example 2 of the present invention;
the main element symbols are as follows:
the water-saving wall comprises a micro pile 1, a crown beam 2, a retaining wall 3, a water discharging hole 4, an anchor rod 5, a water discharging mattress layer 6, a light embankment 7, a stable rock mass 8, a guardrail 9, a facing wall 10, a road surface 11, a sliding surface 12, an original embankment 13, a crown beam anchor rod 14, a step 15 and a facing wall anchor rod 16.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, for the newly-built light embankment structure, the light embankment is arranged on a stable rock mass 8 of a steep hillside, and comprises a lower micro-pile anti-sliding support structure, and further comprises an upper light embankment 7, an anchor rod 5, a retaining wall 3 and a facing wall 10, the lower micro-pile anti-sliding support structure comprises micro-piles 1, crown beams 2 and crown beam anchor rods 14, the micro-piles 1 are vertically arranged in the stable rock mass of the steep hillside at intervals, the bottom of the crown beams 2 is provided with a plurality of drain holes 4, the crown beams 2 are arranged at the top of the micro-piles 1, the crown beams 2 and the crown beam anchor rods 14 are cast-in-place reinforced concrete to form an integral structure, one end of the anchor rods 5 is arranged in the retaining wall 3, the other end of the anchor rods is arranged in the stable rock mass 8, a drainage bed course 6 is arranged at the lower side of the light embankment 7, the drainage mattress layer 6 is communicated with the drainage hole 4, the retaining wall 3 is arranged on the upper side of the crown beam 2, the lower part of the retaining wall 3 and the reinforced concrete of the crown beam 2 are poured into a whole, the upper part of the retaining wall is anchored with the anchor rod 5 into a whole, and the facing wall 10 is provided with a facing wall anchor rod 16.
Wherein the anchor rod 5 is provided with a plurality of anchor rods 5, the anchor rods 5 are uniformly distributed and arranged in a rectangular shape, the horizontal and vertical distances are 3 m-5 m, the size of the anchor rods 5 and the crown beam anchor rods 14 penetrating into the stable rock mass 8 is not less than 5m, the anchor rods 5 and the crown beam anchor rods 14 are designed to be inclined downwards at the stable rock mass 8, the degree of the inclination angle α is 15 +/-5 degrees, the distance between two adjacent drain holes 4 is 3 m-5 m, an expansion joint is arranged at the position of every 15 +/-5 m interval of the retaining wall 3, the drainage mattress layer 6 is combined by geotextile and geomembrane or combined by a drainage plate and geomembrane, a counter slope included angle gamma is formed between the step 15 and the horizontal plane, and the counter slope angle gamma is.
The construction method comprises the following steps:
s1: dividing the whole road into a left road and a right road, excavating a left half-width road of the backer along a designed elevation to form a construction platform with the width of about 5m, and creating conditions for later construction;
s2: constructing a facing wall 10, namely constructing a facing wall anchor rod 16 at the upper part, wherein the facing wall anchor rod 16 is inclined downwards to enter a stable rock body 8, constructing the facing wall 10, and anchoring the facing wall anchor rod 16 and the facing wall 10 into a whole to ensure the safety of an upper side slope and create conditions for lower excavation;
s3: downwards excavating a right half road and finishing the right half road into a step 15 with a reverse slope to form a platform with the width of about 3m, and creating conditions for the construction of the miniature pile 1;
s4: constructing a miniature pile 1, wherein the pile bottom of the miniature pile 1 enters the lower part of the high and steep hillside to stabilize a rock mass 8;
s5: constructing the crown beam anchor rod 14 and the anchor rod 5, and enabling the crown beam anchor rod 14 and the anchor rod 5 to be inclined downwards to enter a stable rock body;
s6: constructing a crown beam 2, connecting a plurality of micro piles 1 and a plurality of crown beam anchor rods 14 into an anti-sliding stable whole through the crown beam 2, and reserving drain holes 4 at the bottom of the crown beam 2;
s7: constructing a retaining wall 3, wherein the retaining wall 3 is a reinforced concrete plate type wall, the lower part of the retaining wall 3 and the crown beam 2 are cast into a whole by reinforced concrete, and the upper part of the retaining wall is anchored with the anchor rod 5 into a whole;
s8: paving a drainage mattress layer 6, wherein the drainage mattress layer 6 is connected with the drainage holes 4 at the bottom of the crown beam 2;
s9: filling self-compacting flow state stable soil into the vibration-free pumping to manufacture a light embankment 7;
after the light embankment structure is built, asphalt or other road surfaces 11 are constructed on the upper surface of the light embankment 7, and the guard rail 9 is built on the upper side of the guard wall 3, so that the highway construction can be completed.
Example 2
As shown in fig. 2, for the light embankment structure repaired by the collapsed embankment, the light embankment is arranged on the stable rock mass 8 of the steep hillside, comprises a lower micro-pile anti-sliding support structure, and further comprises an upper light embankment 7, an anchor rod 5 and a retaining wall 3, the lower micro-pile anti-sliding support structure comprises micro-piles 1, crown beams 2 and crown beam anchor rods 14, the micro-piles 1 are vertically arranged in the stable rock mass at the lower part of the steep hillside at intervals, the bottom of the crown beams 2 is provided with a plurality of drain holes 4, the crown beams 2 are arranged at the top of the micro-piles 1, the crown beams 2 and the crown beam anchor rods 14 are cast-in-place reinforced concrete and form an integral structure, one end of the anchor rod 5 is arranged in the retaining wall 3, the other end of the anchor rod is arranged in the stable rock mass 8, the lower side of the light embankment 7 is provided with a drainage, the drainage mattress layer 6 is communicated with the drainage hole 4, the retaining wall 3 is arranged on the upper side of the crown beam 2, the lower part of the retaining wall 3 and the reinforced concrete of the crown beam 2 are poured into a whole, and the upper part of the retaining wall is anchored with the anchor rod 5 into a whole.
Wherein the anchor rod 5 is provided with a plurality of anchor rods 5, the anchor rods 5 are uniformly distributed and arranged in a rectangular shape, the horizontal and vertical distances are 3 m-5 m, the size of the anchor rods 5 and the crown beam anchor rods 14 penetrating into the stable rock mass 8 is not less than 5m, the anchor rods 5 and the crown beam anchor rods 14 are designed to be inclined downwards at the stable rock mass 8, the degree of the inclination angle α is 15 +/-5 degrees, the distance between two adjacent drain holes 4 is 3 m-5 m, an expansion joint is arranged at the position of every 15 +/-5 m interval of the retaining wall 3, the drainage mattress layer 6 is combined by geotextile and geomembrane or combined by a drainage plate and geomembrane, a counter slope included angle gamma is formed between the step 15 and the horizontal plane, and the counter slope angle gamma is.
The construction method comprises the following steps:
s1: the construction and setting-out of the flat site, the excavation and trimming of the area above the landslide surface 12 of the collapse area are carried out to form a step 15 with a reverse slope, a platform with the width of about 3m is formed, and conditions are created for the construction of the micro pile;
s2: constructing a miniature pile 1: the pile bottom of the miniature pile 1 enters the lower part of the high and steep hill to stabilize the rock mass 8;
s3: constructing the crown beam anchor rod 14 and the anchor rod 5, and enabling the crown beam anchor rod 14 and the anchor rod 5 to be inclined downwards to enter a stable rock body;
s4: constructing a crown beam 2, connecting a plurality of micro piles 1 and a plurality of crown beam anchor rods 14 into an anti-sliding stable whole through the crown beam 2, and reserving drain holes 4 at the bottom of the crown beam 2;
s5: constructing a retaining wall 3, wherein the retaining wall 3 is a reinforced concrete plate type wall, the lower part of the retaining wall 3 and the crown beam 2 are cast into a whole by reinforced concrete, and the upper part of the retaining wall is anchored with the anchor rod 5 into a whole;
s6: paving a drainage mattress layer 6, wherein the drainage mattress layer 6 is connected with the drainage holes 4 at the bottom of the crown beam 2;
s7: the light embankment 7 is made by filling self-compaction flow state stable soil in a vibration-free pumping way.
For the light embankment structure for repairing the collapsed embankment, the protecting wall 10 is not required to be rebuilt because the collapsed part is not the upper slope part in general and the protecting wall 10 is built when the original embankment 13 is built for the unstable upper slope.
After the light embankment structure is built, asphalt or other road surfaces 11 are constructed on the upper surface of the light embankment 7, and the guard rail 9 is built on the upper side of the guard wall 3, so that the highway construction can be completed.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a build light-duty embankment structure on high steep hillside, light-duty embankment set up on high steep hillside's steady rock mass (8), its characterized in that: comprises a lower micro-pile anti-sliding support structure and also comprises a light embankment (7), an anchor rod (5), a retaining wall (3) and a facing wall (10), wherein the lower micro-pile anti-sliding support structure comprises micro-piles (1), a crown beam (2) and a crown beam anchor rod (14), the micro-piles (1) are vertically arranged in a stable rock mass at the lower part of a steep hill at intervals, a plurality of drain holes (4) are arranged at the bottom of the crown beam (2), the crown beam (2) is arranged at the top of the micro-pile (1), the micro-piles (1), the crown beam (2) and the crown beam anchor rod (14) form an integral structure for cast-in-place reinforced concrete, one end of the anchor rod (5) is arranged in the retaining wall (3), the other end of the anchor rod is arranged in the stable rock mass (8), a drainage bedding layer (6) is arranged at the lower side of the light embankment (7), and the drainage bedding layer (6, the lower side of the drainage mattress layer (6) is provided with a step (15) with a reverse slope, the lower part of the retaining wall (3) and the crown beam (2) are cast into a whole by reinforced concrete, the upper part of the retaining wall is anchored with the anchor rod (5) into a whole, and the facing wall (10) is provided with a facing wall anchor rod (16).
2. A lightweight embankment structure built on a steep high slope according to claim 1, wherein: the anchor rods (5) are arranged in a plurality of strips, the anchor rods (5) are uniformly distributed in a rectangular mode, and the horizontal and vertical distances are 3 m-5 m.
3. A light embankment structure built on a steep hillside according to claim 1, characterized in that the size of the penetration of the anchor rods (5) and the crown beam anchor rods (14) into the stabilizing rock mass (8) is not less than 5m, the design of the downward inclination of the anchor rods (5) and the crown beam anchor rods (14) in the stabilizing rock mass (8) is such that the inclination angle α is 15 +/-5 degrees.
4. A lightweight embankment structure built on a steep high slope according to claim 1, wherein: the distance between two adjacent drainage holes (4) is 3-5 m.
5. A lightweight embankment structure built on a steep high slope according to claim 1, wherein: and expansion joints are arranged at the positions of 15 +/-5 m of each interval of the retaining walls (3).
6. A lightweight embankment structure built on a steep high slope according to claim 1, wherein: the drainage mattress layer (6) is formed by combining geotextile and geomembrane or combining a drainage plate and the geomembrane.
7. A lightweight embankment structure built on a steep high slope according to claim 1, wherein: the steps (15) and the horizontal plane form a reverse slope included angle gamma, and the reverse slope angle gamma is 5 +/-0.5 degrees.
8. A construction method of a light embankment structure built on a steep hill according to any one of claims 1 to 7, wherein: the construction method comprises a construction method suitable for newly building an embankment and a construction method for repairing a collapsed embankment;
the construction method of the newly-built embankment comprises the following steps:
s1: dividing the whole road into a left road and a right road, excavating a left half-width road of the backer along a designed elevation to form a construction platform with the width of about 5m, and creating conditions for later construction;
s2: constructing a facing wall (10), namely constructing an upper facing wall anchor rod (16) at first, wherein the upper facing wall anchor rod (16) inclines downwards to enter a stable rock body (8), constructing the facing wall (10), and anchoring the facing wall anchor rod (16) and the facing wall (10) into a whole to ensure the safety of an upper side slope and create conditions for lower excavation;
s3: a step (15) with a reverse slope is trimmed by downwards excavating a right half road to form a platform with the width of about 3m, and conditions are created for the construction of the miniature pile (1);
s4: constructing the miniature pile (1), wherein the pile bottom of the miniature pile (1) enters the lower part of the high and steep hill to stabilize the rock mass (8);
s5: constructing a crown beam anchor rod (14) and an anchor rod (5), and enabling the crown beam anchor rod (14) and the anchor rod (5) to downwards incline to enter a stable rock mass;
s6: constructing a crown beam (2), connecting a plurality of micro piles (1) and a plurality of crown beam anchor rods (14) into an anti-sliding stable whole through the crown beam (2), and reserving drain holes (4) at the bottom of the crown beam (2);
s7: constructing a retaining wall (3), wherein the retaining wall (3) is a reinforced concrete slab wall, the lower part of the retaining wall (3) and the crown beam (2) are cast into a whole by reinforced concrete, and the upper part of the retaining wall is anchored with the anchor rod (5) into a whole;
s8: paving a drainage mattress layer (6), wherein the drainage mattress layer (6) is connected with a drainage hole (4) at the bottom of the crown beam (2);
s9: the light embankment (7) is made by filling self-compaction flow state stable soil in a vibration-free pumping way;
the construction method for repairing the collapsed embankment comprises the following steps:
s1: the construction and paying-off of a flat field are carried out, the area above a landslide surface (12) of a collapse area is excavated and trimmed to form a step (15) with a reverse slope, a platform with the width of about 3m is formed, and conditions are created for the construction of the micro pile;
s2: constructing the miniature pile (1), wherein the pile bottom of the miniature pile (1) enters the lower part of the high and steep hill to stabilize the rock mass (8);
s3: constructing a crown beam anchor rod (14) and an anchor rod (5), and enabling the crown beam anchor rod (14) and the anchor rod (5) to downwards incline to enter a stable rock mass;
s4: constructing a crown beam (2), connecting a plurality of micro piles (1) and a plurality of crown beam anchor rods (14) into an anti-sliding stable whole through the crown beam (2), and reserving drain holes (4) at the bottom of the crown beam (2);
s5: constructing a retaining wall (3), wherein the retaining wall (3) is a reinforced concrete slab wall, the lower part of the retaining wall (3) and the crown beam (2) are cast into a whole by reinforced concrete, and the upper part of the retaining wall is anchored with the anchor rod (5) into a whole;
s6: paving a drainage mattress layer (6), wherein the drainage mattress layer (6) is connected with a drainage hole (4) at the bottom of the crown beam (2);
s7: the light embankment (7) is made by filling self-compaction flow state stable soil in a vibration-free pumping way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330501.5A CN111304988B (en) | 2019-12-20 | 2019-12-20 | Light embankment structure built on steep hillside and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330501.5A CN111304988B (en) | 2019-12-20 | 2019-12-20 | Light embankment structure built on steep hillside and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111304988A true CN111304988A (en) | 2020-06-19 |
| CN111304988B CN111304988B (en) | 2024-09-20 |
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|---|---|---|---|
| CN201911330501.5A Active CN111304988B (en) | 2019-12-20 | 2019-12-20 | Light embankment structure built on steep hillside and construction method |
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| CN113931140A (en) * | 2021-11-08 | 2022-01-14 | 中水珠江规划勘测设计有限公司 | Rock-fill dam and dam crest spillway antiskid stable structure thereof |
| CN115404734A (en) * | 2022-09-30 | 2022-11-29 | 中国电建集团贵州电力设计研究院有限公司 | Ecological restoration method for partial collapse of high fill road |
| CN115897318A (en) * | 2022-09-30 | 2023-04-04 | 中国电建集团贵州电力设计研究院有限公司 | Ecological restoration method for partial collapse of semi-excavated and semi-filled road |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113931140A (en) * | 2021-11-08 | 2022-01-14 | 中水珠江规划勘测设计有限公司 | Rock-fill dam and dam crest spillway antiskid stable structure thereof |
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| CN115404734B (en) * | 2022-09-30 | 2024-03-26 | 中国电建集团贵州电力设计研究院有限公司 | Ecological restoration method for partial collapse of high-fill road |
| CN115897318B (en) * | 2022-09-30 | 2024-10-08 | 中国电建集团贵州电力设计研究院有限公司 | Ecological restoration method for partial collapse of half-excavated and half-filled road |
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| CN111304988B (en) | 2024-09-20 |
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