CN112252338A

CN112252338A - Expansive soil slope bank protection structure and construction method thereof

Info

Publication number: CN112252338A
Application number: CN202010981913.1A
Authority: CN
Inventors: 周伟峰; 王铁锋; 徐勇鑫; 陆纪亮; 姜亦奇
Original assignee: Zhejiang Qiantang River Water Conservancy Construction Engineering Co ltd
Current assignee: Zhejiang Qiantang River Water Conservancy Construction Engineering Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-01-22

Abstract

The application relates to an expansive soil side slope revetment structure, the expansive soil side slope comprises a slope top and a slope surface, one side of the slope surface, which is far away from the slope top, is a slope bottom, the slope surface is provided with a plurality of cement boards, reinforcing mesh is arranged in the cement boards, the side, which is close to the slope surface, of each cement board is step-shaped, built-in piles implanted into the slope surface are pre-buried in the cement boards, a cement layer is arranged on the surface of the slope top, fixed piles implanted into the slope top are pre-buried in the cement layers, and one end, which is far away from the slope bottom, of each cement board; forming a spacing section between the adjacent cement boards, wherein a clay layer is laid on the spacing section, and a vegetable layer is planted on the clay layer; a drainage ditch is arranged at the slope bottom, and a retaining wall is arranged between the drainage ditch and the slope surface; the method has the effects of reducing the possibility of cracks appearing on the protective layer of the expansive soil side slope and improving the stability of the expansive soil side slope; also provides a construction method of the expansive soil slope revetment structure.

Description

Expansive soil slope bank protection structure and construction method thereof

Technical Field

The application relates to the field of expansive soil slope protection, in particular to an expansive soil slope revetment structure and a construction method thereof.

Background

The expansive soil mainly comprises montmorillonite and illite which are strong hydrophilic clay minerals, is high-plasticity cohesive soil with an expansive structure, multiple fissures, strong expansion and contraction properties and strength attenuation properties, and is also typical unsaturated soil. The expansive soil brings harm to engineering activities, and the strength attenuation characteristic caused by repeated expansion and contraction deformation due to water absorption and water loss has long-term potential damage effect on engineering facilities.

In the prior art, research has been carried out on the expansive soil side slope and certain progress has been achieved, for example, a chinese patent with publication number CN104264694B discloses a construction method of the expansive soil side slope, which comprises the following steps: 1) controlling the slope of the expansive soil slope surface at 45-60 degrees, compacting and flattening the slope surface, processing the intersection of the slope top and the expansive soil slope surface into a circular arc shape, arranging a retaining wall at the toe of the slope, and respectively arranging intercepting ditches at the outer sides of the slope top and the retaining wall; 2) uniformly paving clay layers with the thickness of 10-20cm on the slope top and the surface of the expansive soil slope; 3) and uniformly implanting fiber ribs with the length of 20-25cm into the expansive soil slope surface, wherein the top ends of the fiber ribs are exposed out of the clay layer by 1-3 cm.

In view of the above-mentioned related arts, the inventors have considered that cracks are easily generated in the clay layer due to repeated swelling and shrinkage of the expansive soil due to water absorption and water loss over a long period of time, thereby causing a problem of poor slope stability.

Disclosure of Invention

To prior art's not enough, the first aim at of this application provides an inflation soil side slope revetment structure, has the cracked possibility of reduction inflation soil side slope inoxidizing coating appearance, improves the effect of the stability of inflation soil side slope.

A second object of the present application is to provide a method for preparing an insulated enamel wire.

In order to achieve the first purpose of the application, the following technical scheme is adopted:

the bank protection structure of the expansive soil side slope comprises a slope top and a slope surface, wherein a slope bottom is arranged on one side, away from the slope top, of the slope surface, the slope surface is provided with a plurality of cement plates, reinforcing mesh is arranged in the cement plates, one side, close to the slope surface, of each cement plate is step-shaped, a plurality of built-in piles implanted into the slope surface are pre-buried in the cement plates, a cement layer is arranged on the surface of the slope top, fixed piles implanted into the slope top are pre-buried in the cement layers, and one end, away from the slope bottom, of each cement plate is connected with the cement layer;

forming a spacing section between the adjacent cement boards, wherein a clay layer is laid on the spacing section, and a vegetable layer is planted on the clay layer;

the slope bottom is provided with the escape canal, the escape canal with be provided with retaining wall between the domatic.

By adopting the technical scheme, the cement board and the retaining wall are arranged, so that the expansive soil side slope can be well stabilized, the expansive soil is not easy to slide, the reinforcing mesh is arranged in the cement board, the cement board is not easy to crack, the cement board is arranged into a plurality of blocks, the expansive soil can deviate to the spacing section when the expansive soil extrudes the cement board, so that the spacing section has a buffering effect on the cement board, and the cement board is not easy to crack under the synergistic effect of the reinforcing mesh and the spacing section, so that the stability of the expansive soil side slope is improved; the surface of the cement board close to the slope is step-shaped, so that the contact area between the cement board and the slope can be increased, the cement board is not easy to move relative to the slope, and the combination degree between the cement board and the slope is higher; in the interval section, the expansive soil, the clay layer and the vegetable layer form an organic whole, so that the expansive soil, the clay layer and the vegetable layer cannot slip or peel off from each other due to erosion of conditions such as wind, rain, sunlight and the like, and the interval section is relatively stable; due to the arrangement of the cement board, part of water flows down from the cement board, and rainwater can be reduced from permeating into the expansive soil through the spacing section; in conclusion, the expansive soil side slope revetment structure can reduce the possibility of cracking of a protective layer of the expansive soil side slope and improve the stability of the expansive soil side slope.

Preferably, both sides of the cement board are respectively and fixedly connected with a blocking wall.

By adopting the technical scheme, the barrier wall can prevent the clay layer from spreading to the surface of the cement board.

Preferably, a plurality of barrier strips are arranged on the spacing sections, and reinforcing piles implanted into the slope are fixedly connected to two ends of each barrier strip.

Through adopting above-mentioned technical scheme, the blend stop plays the supporting role to the clay layer, can block that the clay layer drops downwards, and the reinforcing pile can play the supporting role to the blend stop.

Preferably, the barrier strip is curved towards the top of the slope and is arc-shaped.

By adopting the technical scheme, the barrier strips are arc-shaped, so that the contact area between the barrier strips and a clay layer can be increased, and the clay layer is better supported.

Preferably, the position of the barrier wall close to the end part of the barrier strip is provided with a notch.

Through adopting above-mentioned technical scheme, there is rivers in the compartment to rivers are great, and rivers are blockked by the blend stop, and then flow direction blend stop both sides, then flow to the cement board from the breach on, then along cement board flow direction escape canal, can avoid rivers to continue to flow along the compartment, thereby reduce the inside infiltration of rivers flow to the compartment.

Preferably, the acute angle between the sloping surface and the ground is 45-60 °.

Through adopting above-mentioned technical scheme, in this angle, can make the native side slope revetment structure of inflation relatively stable.

Preferably, the cement layer is fixedly connected with a fixed wall close to the spacing section.

By adopting the technical scheme, the fixed wall can prevent water from flowing to the interval section, so that the water flows along the cement board.

Preferably, the fixing wall is bent towards the direction away from the spacing section or is in an arc shape bent towards the direction away from the spacing section.

Through adopting above-mentioned technical scheme, the fixed wall of this structure can play better guide effect to rivers, makes the better flow direction cement board of rivers.

Preferably, the thickness of the retaining wall gradually increases toward the ground.

Through adopting above-mentioned technical scheme, the separation wall of this structure is more stable, can play better supporting role to domatic.

In order to achieve the second purpose of the application, the following technical scheme is adopted:

a construction method of an expansive soil side slope revetment structure comprises the following specific steps:

1) leveling and compacting the slope top, trimming the slope to form an acute angle of 45-60 degrees with the ground, and leveling and compacting the slope;

2) implanting a fixed pile at the top of the slope, implanting an internal pile in the slope, wherein the fixed pile and the internal pile are respectively higher than the top of the slope and the surface of the slope, and then arranging a cement layer at the top of the slope to enable the exposed end of the internal pile to be level by the cement layer;

3) excavating a step between every two rows of built-in piles, pouring cement plates on the surface of the step, covering the built-in piles by the cement plates, respectively pouring barrier walls on two sides of the cement plates, leaving paired gaps on the barrier walls, forming a spacing section between every two adjacent cement plates, and pouring a fixed wall at the position, close to the spacing section, of the cement layer;

4) implanting paired reinforced piles at the bottom of the spacing section to enable the reinforced piles to be higher than the surface of the spacing section, then pouring a barrier strip, covering the reinforced piles by the barrier strip, respectively arranging two ends of the barrier strip at positions, close to the lower parts, of gaps on two sides of the barrier strip, then laying a clay layer at the bottom of the spacing section, and then laying vegetation layers such as turf and the like on the clay layer;

5) then, a drainage ditch is dug at the slope bottom, and then a retaining wall is poured at the position, close to the slope surface, of the bottom of the drainage ditch.

Through adopting above-mentioned technical scheme for rivers are great probably to flow through from the cement board, thereby have reduced the infiltration of inflation soil, and the interval section plays the cushioning effect to the cement board, makes inflation soil slope revetment structure difficult to produce the crack, and is more stable.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the plurality of cement boards are arranged, and the reinforcing mesh is poured in the cement boards, so that the partition sections can buffer the cement boards when the expansive soil is expanded and contracted repeatedly, and the reinforcing mesh can prevent the cement boards from being broken easily, so that the expansive soil slope revetment structure is stable;

2. through seting up the breach on the separation wall at blend stop both sides, can make rivers follow the blend stop along the blend stop and from breach flow direction cement board when rivers are great, reduce along the interval section continuation rivers to the domatic inside infiltration of reducing.

Drawings

Fig. 1 is a schematic structural diagram of the present application.

Fig. 2 is a schematic view showing the structure of the cement layer.

Fig. 3 is a schematic view showing the structure of the cement board.

Fig. 4 is a schematic view showing the structure of a clay layer.

Fig. 5 is a schematic structural view showing a barrier rib.

Description of reference numerals: 1. expanding soil slope; 11. the top of the slope; 12. a slope surface; 13. a slope bottom; 2. a cement layer; 21. fixing the pile; 22. fixing a wall; 3. a cement board; 31. pile is built in; 32. a barrier wall; 321. a notch; 4. a spacer section; 41. a clay layer; 42. a vegetable layer; 43. blocking strips; 431. reinforcing piles; 5. a drainage ditch; 6. a retaining wall.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

Referring to fig. 1 and 2, the expansive soil side slope revetment structure comprises an expansive soil side slope 1 and an inclined slope surface 12, wherein a slope bottom 13 is arranged on one side of the slope surface 12, which is far away from the slope top 11. The angle between the sloping surface 12 and the ground is 45 deg., or 60 deg.. The surface of the slope top 11 is provided with a cement layer 2, a fixing pile 21 implanted into the slope top 11 is embedded in the cement layer 2, and the fixing pile 21 is vertically inserted into the slope top 11. The fixing pile 21 improves the adhesion between the cement layer 2 and the top of the slope 11, so that the cement layer 2 is not easy to move relative to the surface of the top of the slope 11.

As shown in fig. 1 and 3, a plurality of cement boards 3 are arranged on the slope surface 12, and one end of each cement board 3 close to the slope surface 12 is fixedly connected with the cement layer 2. A reinforcing mesh (not shown) is arranged in the cement board 3, and one side of the cement board 3 close to the slope surface 12 is arranged in a step shape. A plurality of built-in piles 31 are embedded in the cement plate 3, and the built-in piles 31 are inserted into the slope surface 12. The reinforcing mesh makes 3 structure of cement slab difficult cracked, and cement slab 3 sets up to the step form near domatic 12 one side, can increase the area of contact between cement slab 3 and the domatic 12, makes 3 difficult domatic 12 slip relatively of cement slab, and built-in pile 31 makes cement slab 3 more firm on domatic 12.

As shown in fig. 4, a spacer 4 is formed between two adjacent cement boards 3, a clay layer 41 is laid at the bottom of the spacer 4, and a vegetation layer 42 is planted on the clay layer 41, so that the expansive soil, the clay layer 41 and the vegetation layer 42 in the spacer 4 form an organic whole, and the three layers do not slip or peel off due to erosion under conditions such as wind, rain and sunlight, and the spacer 4 is relatively stable.

When the expansive soil expands and contracts due to water absorption and water loss, the extrusion force of the expansive soil on the cement board 3 is deviated to the spacer 4, the spacer 4 can buffer the cement board 3, the force borne by the cement board 3 is reduced, the cement board 3 is not easy to crack, and the reinforcing mesh has certain cohesive force on the cement board 3, so that the cement board 3 is not easy to crack. Under the synergistic action of the reinforcing mesh and the spacing segments 4, the expanded soil slope 1 is well protected.

As shown in fig. 4, the blocking walls 32 are fixedly connected to both sides of the cement board 3, respectively, and the blocking walls 32 can prevent the clay layer 41 from spreading to the surface of the cement board 3, thereby stabilizing the clay layer 41.

As shown in fig. 4 and 5, a row of arc-shaped barrier strips 43 are arranged in the spacing section 4, and the barrier strips 43 are bent towards the top of the slope 11. The two ends of the barrier 43 are fixedly connected with reinforcing piles 431 inserted into the slope 12. A gap exists between the barrier ribs 43 and the cement plate 3, and the positions of the barrier walls 32 close to the barrier ribs 43 are provided with notches 321.

The barrier ribs 43 support the clay layer 41, so that the clay layer 41 can be prevented from falling off downwards, and the reinforcing piles 431 can support the barrier ribs 43. And when there is great rivers in the compartment 4, rivers are blockked by blend stop 43, and then flow to blend stop 43 both sides, then flow to cement board 3 from breach 321 on, then flow to escape canal 5 along cement board 3, can avoid rivers to continue to flow along compartment 4 to reduce the inside infiltration of rivers flow to compartment 4, make the inflation soil under the clay layer 41 absorb water less. The reinforcement piles 431 may increase the stability of the barrier bars 43.

As shown in fig. 1, a fixing wall 22 is fixedly connected to the cement layer 2 near the spacer 4, the middle position of the fixing wall 22 is bent in a direction away from the spacer 4, and the fixing wall 22 may also be an arc bent in a direction away from the spacer 4. The fixed wall 22 can play a better guiding role in water flow, so that the water flow is better towards the cement plate 3, the water flow towards the interval section 4 is reduced, the water flow in the interval section 4 can be smaller, and the water seepage amount of the expansive soil under the slope surface 12 in the interval section 4 can be reduced.

As shown in fig. 1, the slope bottom 13 is provided with a drainage ditch 5, a retaining wall 6 is arranged between the drainage ditch 5 and the slope surface 12, one end of the retaining wall 6, which is far away from the ground, is fixedly connected with the cement board 3, and the retaining wall 6 can play a better supporting role for the slope surface 12. The retaining wall 6 keeps away from ground one end to being close to 5 direction slopes in escape canal, can make the better flow direction escape canal 5 of domatic 12 downed water. The thickness of the blocking wall 32 gradually increases toward the ground, so that the blocking wall 32 is relatively stable.

The construction method of the expansive soil side slope revetment structure comprises the following specific steps:

1) leveling and compacting the slope top 11, trimming the slope 12 to an angle of 45-60 degrees with the ground, and leveling and compacting the slope 12;

2) implanting a fixed pile 21 at the top of the slope 11, implanting an internal pile 31 at the slope 12, wherein the fixed pile 21 and the internal pile 31 are respectively higher than the surfaces of the top of the slope 11 and the surface of the slope 12, and then arranging a cement layer 2 at the top of the slope 11 to enable the cement layer 2 to level the exposed end of the internal pile 31;

3) excavating a step between every two rows of built-in piles 31, then pouring cement plates 3 on the surface of the step, covering the built-in piles 31 with the cement plates 3, respectively pouring barrier walls 32 on two sides of the cement plates 3, leaving paired gaps 321 on the barrier walls 32, forming a spacing section 4 between every two adjacent cement plates 3, and pouring a fixed wall 22 at the position, close to the spacing section 4, of the cement layer 2;

4) implanting a pair of reinforced piles 431 at the bottom of the spacing section 4 to enable the reinforced piles 431 to be higher than the surface of the spacing section 4, then pouring a barrier strip 43, covering the reinforced piles 431 by the barrier strip 43, respectively arranging the two ends of the barrier strip 43 below the notches 321 on the two sides of the barrier strip 43, then paving a clay layer 41 at the bottom of the spacing section 4, and then paving vegetation layers 42 such as turf on the clay layer 41;

5) then, a drainage ditch 5 is dug at the slope bottom 13, and then a retaining wall 6 is poured at the bottom of the drainage ditch 5 close to the slope surface 12.

The implementation principle of the embodiment is as follows: in rainy days, rainwater flows to the slope surface 12 along the slope top 11, water flow is blocked by the fixed wall 22, and water flow flows to the cement board 3 along the fixed wall 22, then flows into the drainage ditch 5 downwards along the cement board 3 and is drained away along the drainage ditch 5.

When the rainwater is more in the interval section 4, the rainwater in the interval section 4 flows to both sides along the barrier strip 43, flows to the cement board 3 through the notch 321, and flows to the drainage ditch 5 along the cement board 3.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an inflation soil slope revetment structure, inflation soil slope (1) are including top of slope (11) and domatic (12), and top of slope (11) one side is kept away from to domatic (12) is slope bottom (13), its characterized in that: the slope surface (12) is provided with a plurality of cement plates (3), reinforcing meshes are arranged in the cement plates (3), one surface, close to the slope surface (12), of each cement plate (3) is step-shaped, a plurality of built-in piles (31) implanted into the slope surface (12) are pre-buried in each cement plate (3), a cement layer (2) is arranged on the surface of the slope top (11), fixing piles (21) implanted into the slope top (11) are pre-buried in each cement layer (2), and one end, far away from the slope bottom (13), of each cement plate (3) is connected with the cement layer (2);

an interval section (4) is formed between the adjacent cement boards (3), a clay layer (41) is laid on the interval section (4), and a vegetation layer (42) is planted on the clay layer (41);

the slope bottom (13) is provided with a drainage ditch (5), the drainage ditch (5) and a retaining wall (6) is arranged between the slope surfaces (12).

2. The expansive soil slope revetment structure according to claim 1, wherein: and two sides of the cement board (3) are respectively and fixedly connected with a separation wall (32).

3. The expansive soil slope revetment structure according to claim 1, wherein: a plurality of barrier strips (43) are arranged on the interval section (4), and reinforcing piles (431) implanted into the slope surface (12) are fixedly connected to the two ends of the barrier strips (43).

4. The expansive soil slope revetment structure according to claim 1, wherein: the barrier strip (43) is curved towards the direction of the slope top (11) and is arc-shaped.

5. The expansive soil slope revetment structure according to claim 1, wherein: the position of the blocking wall (32) close to the end part of the barrier strip (43) is provided with a notch (321).

6. The expansive soil slope revetment structure according to claim 1, wherein: the acute angle between the surface of the sloping surface (12) and the ground is 45-60 degrees.

7. The expansive soil slope revetment structure according to claim 1, wherein: the cement layer (2) is fixedly connected with a fixed wall (22) close to the spacing section (4).

8. The expansive soil slope revetment structure according to claim 1, wherein: the fixed wall (22) is bent towards the direction far away from the spacing section (4) or is in an arc shape bent towards the direction far away from the spacing section (4).

9. The expansive soil slope revetment structure according to claim 1, wherein: the thickness of the retaining wall (6) is gradually increased towards the direction close to the ground.

10. A construction method of an expansive soil slope bank protection structure according to any one of claims 1 to 9, wherein: which comprises the following steps:

1) leveling and compacting the slope top (11), trimming the slope surface (12) to an angle of 45-60 degrees with the ground, and leveling and compacting the slope surface (12);

2) implanting a fixed pile (21) at the top of the slope (11), implanting an internal pile (31) at the slope (12), wherein the fixed pile (21) and the internal pile (31) are respectively higher than the surfaces of the top of the slope (11) and the surface of the slope (12), and then arranging a cement layer (2) at the top of the slope (11) to enable the exposed end of the internal pile (31) to be level by the cement layer (2);

3) excavating a step between every two rows of built-in piles (31), pouring a cement plate (3) on the surface of the step, covering the built-in piles (31) by the cement plate (3), respectively pouring a separation wall (32) on two sides of the cement plate (3), leaving a pair of gaps (321) on the separation wall (32), forming a spacing section (4) between every two adjacent cement plates (3), and pouring a fixed wall (22) at the position, close to the spacing section (4), of a cement layer (2);

4) implanting paired reinforced piles (431) at the bottom of the interval section (4), enabling the reinforced piles (431) to be higher than the surface of the interval section (4), then pouring barrier strips (43), covering the reinforced piles (431) by the barrier strips (43), enabling two ends of each barrier strip (43) to be respectively positioned at the lower positions of notches (321) at two sides of each barrier strip (43), then paving clay layers (41) at the bottom of the interval section (4), and then paving vegetation layers (42) such as turf and the like on the clay layers (41);

5) then, a drainage ditch (5) is dug at the slope bottom (13), and then a retaining wall (6) is poured at the position, close to the slope surface (12), of the bottom of the drainage ditch (5).