Passive blocking and protecting structure for ditch source collapse rolling stones

Abstract

The utility model discloses a passive blocking and protecting structure for ditch source collapse rolling stones, which comprises a multi-stage blocking structure arranged in a ditch and a buffer percolation structure arranged on the inner side of the blocking structure, the blocking structure further comprises a sheet-pile wall and a gravity type check dam, the sheet-pile wall is arranged at the lower part or the tail end of the ditch source collapse of the ditch, and the gravity type check dam is arranged on the lower part or the tail end of the ditch source collapse of the ditch. A multi-stage gravity type check dam is distributed in the channel on the front side of the sheet-pile wall; the blocking structure can be completely arranged to be a sheet-pile wall or a gravity type check dam. The blocking structure can be alternately provided with sheet-pile walls and gravity type check dam dams according to terrains; the buffering percolation structure further comprises a buffering layer, a rockfall groove and a percolation structure. Through the design of the blocking structure, the buffer layer and the percolation structure, the purposes of blocking rolling stones, draining ditch water and effectively preventing the ditch source from collapsing the rolling stones can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model discloses a ditch source side slope retaining structure technical field, concretely relates to a ditch source collapse rolling stone passive blocking protection structure. BACKGROUND

[0002] At present, the passive blocking protection of collapse rolling stone mainly adopts passive protection net, protective fence, retaining wall and stone intercepting ditch, rockfall chute, blocking structure + rockfall chute + buffer layer structure and shed hole protection structure. These structures and measures have good effect through engineering practice, but have respective limitations on topography and hydrological conditions, especially the rolling stone disaster formed by ditch source collapse, which often forms collapse and water stone flow of different scales along the ditch. For this kind of situation, a single passive blocking structure is difficult to effectively block the rolling stone in the ditch and ensure the stability of the blocking structure. The previous passive blocking structure and scheme have the following problems:

[0003] 1. Insufficient topographic adaptability, traditional blocking structures (such as retaining walls and protective nets) rely on flat foundations or stable bedrock, while the topography of valleys is often steep and the bedrock at the bottom of the ditch is severely eroded and broken, making it difficult to consider the foundation conditions and anchoring conditions. The structure is prone to instability due to foundation deformation or sliding, resulting in overall failure;

[0004] 2. The impact resistance and scale are not matched, and the ditch source collapse is often accompanied by large-scale rolling stone groups or water stone flow impact. The traditional structure (such as passive protection net) has limited impact energy and lacks a multi-stage energy dissipation mechanism, so high-energy rolling stones can directly penetrate the blocking net or hit the retaining wall;

[0005] 3. Water stone flow coupling damage, water stone flow is easy to form in the ditch during the rainy season, and the water flow erodes and hollows out the structure foundation, while the rolling stones intensify the impact force. The traditional structure lacks coordinated protection against water power, and the blocking structure tilts or collapses due to water erosion;

[0006] 4. At the same time, the traditional rock wall (blocking structure) + rockfall chute + buffer layer does not consider or does not fully consider the water flow in the ditch, which can easily lead to the failure of the rockfall chute and buffer layer.

[0007] Therefore, the present application provides a ditch source collapse rolling stone passive blocking protection structure. Utility model content

[0008] In order to solve the above technical problems, the utility model provides a ditch source collapse rolling stone passive blocking protection structure, which can intercept rolling stones, drain ditch water and effectively prevent and control ditch source collapse rolling stones through the design of the blocking structure, buffer layer and filtration structure.

[0009] In order to achieve the above technical effects, the utility model discloses a passive blocking protection structure for gully source collapse and rolling stone, which comprises a multistage blocking structure arranged in a gully and a buffer filtration structure arranged inside the blocking structure, wherein the blocking structure further comprises a stake board wall and a gravity type check dam, the stake board wall is arranged at the lower part or the end of the gully source collapse, and a plurality of gravity type check dams are distributed in the gully in front of the stake board wall; the blocking structure can also be entirely arranged as the stake board wall or the gravity type check dam; the blocking structure can also be alternately arranged with the stake board wall and the gravity type check dam according to the terrain; the buffer filtration structure further comprises a buffer layer, a rockfall chute and a filtration structure, the rockfall chute is arranged between the front lower side of the buffer layer and the slope of the gully, and the bottom of the rockfall chute is provided with the filtration structure which can separate water and stones and is connected with the rear side of the gravity type check dam.

[0010] Preferably, the stake board wall further comprises anti-skid piles and a baffle, the anti-skid piles can have a square brick diameter of 1.25*1.5m, a pile spacing of 4-5m, a pile length of 10-15m and an exposed length of 5-6m, the baffle is a one-time toe or a prefabricated baffle with a size of 0.5*1*5m, and a leg frame for supporting the baffle is arranged on the anti-skid piles below the bottom baffle.

[0011] Preferably, a steel reinforcement grid is arranged on the part of the gully that is not blocked by the baffle at the middle lower side of the stake board wall, and a gravel layer is arranged on the front side of the steel reinforcement grid.

[0012] Preferably, the gravity type check dam has a structure with a deep rear side and a hidden front side, the front side slope ratio of the wall body is 1:0.35, the rear side slope ratio of the wall body is 1:0.1, the wall top width is 1.5m, and the wall body material is M10 mortar stone.

[0013] Preferably, the height of the buffer layer is consistent with the effective height of the blocking structure, and the buffer layer is arranged in a trapezoidal shape with a top width of 1.2-2m and a buffer layer slope backfill ratio of 1:0.75.

[0014] Preferably, the buffer layer further comprises a buffer inner layer and a buffer outer layer, the buffer inner layer is arranged as a gravel clay layer, and the buffer outer layer is arranged as a dry-laid stone layer or a block stone layer with a thickness of 40cm.

[0015] Preferably, the filtration structure further comprises a water-stone separation filter layer, a drainage culvert, a filter screen and a filter-proof layer, the water-stone separation filter layer is arranged on the lower side of the buffer layer and the rockfall chute, the drainage culvert is arranged in the water-stone separation filter layer and the rear end of the drainage culvert is inclined downward and penetrates through the blocking structure, the front end of the drainage culvert is provided with the filter screen, and the filter-proof layer is arranged below the water-stone separation filter layer.

[0016] Preferably, the water-stone separation filter layer is composed of gravel blocks, and the filter-proof layer is composed of impermeable geotextile or a 20cm-thick concrete bottom plate.

[0017] Preferably, the filter screen is arranged as a steel filter screen.

[0018] The utility model discloses a beneficial effect is:

[0019] The utility model discloses mainly to solve the problem of prevention and cure of collapse rockfall, the geological disaster under the water effect of gully, its with multistage blocking structure including stake board wall, gravity type check dam as the support structure of rear side, the front side adopts the gravel, clay backfill into trapezoidal buffer layer, and the outside of buffer layer adopts dry to build piece stone or block stone and piles, and is provided with rockfall chute between the buffer layer front downside and gully slope. The rockfall chute bottom sets up filtration structure, including the water stone separation filter layer of gravel composition, drainage culvert pipe and concrete support structure reserved water hole. Make the whole stability of protection structure, play multistage blocking and water stone separation's purpose, and give consideration to the appearance of structure beautiful coordination, and the technology is mature, and convenient construction and post stage maintenance.

[0020] The blocking structure is safe and reliable, and is convenient for blocking and protecting the collapse and rolling stones of the gully source. Through the design of the blocking structure, the buffer layer and the filtration structure, the rolling stones can be intercepted and drained, and the purpose of effectively preventing and treating the collapse and rolling stones of the gully source can be achieved. The equipment is convenient to construct, the structures are all mature support structures designed by taking advantages of each other, the construction technology is mature, and the structures have excellent blocking and protection effects on the collapse and rolling stones of the gully source. The structures have universality, and can be used for passive blocking and protection of the collapse and rolling stones of all slope gully sources. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and the person skilled in the art can also obtain other drawings according to these drawings without paying creative labor.

[0022] Figure 1 It is the engineering section view of the passive blocking protection structure of the utility model;

[0023] Figure 2 It is the side view section view of the stake board wall of the utility model;

[0024] Figure 3 It is the front view section view of the stake board wall of the utility model;

[0025] Figure 4 It is the side view section view of the gravity type check dam of the utility model;

[0026] Figure 5 It is the structure view of the filter screen of the utility model;

[0027] In the drawings, the component list represented by each sign is as follows:

[0028] 1. Gully; 2. Ditch; 3. Pile-slab wall; 4. Gravity dam; 5. Anti-slide pile; 6. Baffle; 7. Leg frame; 8. Reinforcing grating; 9. Crushed stone layer; 10. Inner buffer layer; 11. Outer buffer layer; 12. Water-stone separation filter layer; 13. Drainage culvert; 14. Filter screen; 15. Filter layer. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example 1

[0030] like Figures 1 to 5 As shown, the prior art in this embodiment has the following problems: the inventors found that the prior art has insufficient terrain adaptability, the impact resistance is not matched with the scale, and water-rock flow coupling damage is easy to occur. Finally, it was found that the traditional rockfall wall (barrier structure) + rockfall trough + buffer layer does not take into account the water flow in the ditch or does not take into account it thoroughly, which can easily lead to the failure of the rockfall trough and buffer layer.

[0031] Therefore, the inventor provides a passive retaining and protection structure for gully-source landslides and rockfalls, including a multi-stage retaining structure installed in the gully 2 and a buffer and seepage structure installed inside the retaining structure. The retaining structure also includes a pile-slab wall 3 and a gravity-type valley dam 4. The pile-slab wall 3 is installed at the lower part or end of the gully source landslide in the gully 2, and multiple gravity-type valley dams 4 are distributed in the gully 2 in front of the pile-slab wall 3. The retaining structure can also be entirely set as pile-slab walls 3 or gravity-type valley dams 4. The retaining structure can also be alternately set as pile-slab walls 3 and gravity-type valley dams 4 according to the terrain. The buffer and seepage structure also includes a buffer layer, a rockfall trough, and a seepage structure. A rockfall trough is set between the lower front side of the buffer layer and the slope of the gully 2. A seepage structure that can separate water and rocks and connect to the rear side of the gravity-type valley dam 4 is set at the bottom of the rockfall trough.

[0032] Its effects are as follows: This utility model mainly aims to solve the problem of preventing geological disasters caused by rockfalls and rolling stones under the action of water in gullies. It uses a multi-stage retaining structure, including a pile-slab wall 3 and a gravity-type dam 4, as the rear support structure. The front side uses a trapezoidal buffer layer backfilled with crushed stone and clay. The outer side of the buffer layer is constructed with dry-laid rubble or boulders. A rockfall trough is set between the lower front side of the buffer layer and the slope of the gully 2. A seepage filtration structure is set at the bottom of the rockfall trough, including a water-stone separation filter layer 12 made of crushed stone, a drainage culvert 13, and a concrete support structure with reserved drainage holes. This ensures the overall stability of the protective structure, achieving the purpose of multi-stage retaining and water-stone separation, while also considering the aesthetic appearance of the structure. The technology is mature, and it is convenient for construction and subsequent maintenance.

[0033] The designed blocking structure is safe and reliable, and is convenient for blocking and protecting the collapse and rolling stones of the gully 1 source; through the design of the blocking structure, the buffer layer and the filtration structure, the rolling stones can be intercepted, the gully water can be drained, and the purpose of effectively preventing and treating the collapse and rolling stones of the gully 1 source can be achieved; the equipment is convenient to construct, the structure is designed by taking the advantages of the mature supporting structures, the construction technology is mature, and the structure has a good blocking and protection effect on the collapse and rolling stones of the gully 1 source; the structure has universality, and can be used for passive blocking and protection of the collapse and rolling stones of the gully 1 source on all slope surfaces.

[0034] Further, the pile-slab wall 3 further comprises the anti-skid pile 5 and the baffle 6, the anti-skid pile 5 can adopt square bricks with a diameter of 1.25*1.5 m, a pile spacing of 4-5 m, a pile length of 10-15 m, and an exposed length of 5-6 m, the baffle 6 adopts a one-time toe or is prefabricated as a baffle 6 with a size of 0.5*1*5 m, and the anti-skid pile 5 below the bottom baffle 6 is provided with a leg support 7 supporting the baffle 6.

[0035] Further, the steel bar grid 8 is provided on the part of the gully 2 not blocked by the baffle 6 in the middle lower side of the pile-slab wall 3, and the front side of the steel bar grid 8 is provided with the gravel layer 9; the steel bar grid 8 in the structure can be used as a supporting retaining wall of the gravel layer 9, so that the gravel layer 9 can filter the mud and water flowing down while blocking the collapse and rolling stones of the gully source.

[0036] Further, the gravity type check dam 4 adopts a structure with a deep rear side and a hidden front side, the front side slope ratio of the wall body is 1:0.35, the rear side slope ratio of the wall body is 1:0.1, the wall top width is 1.5 m, and the wall body material adopts M10 mortar masonry.

[0037] Further, the height of the buffer layer is consistent with the effective height of the blocking structure, and the buffer layer is arranged in a trapezoidal shape with a top width of 1.2-2 m and a buffer layer slope backfilling ratio of 1:0.75.

[0038] Further, the buffer layer further comprises a buffer inner layer 10 and a buffer outer layer 11, the buffer inner layer 10 is arranged as a gravel clay layer, and the buffer outer layer 11 is arranged as a dry-laid stone layer or a block stone layer with a thickness of 40 cm; the structure can relieve the impact.

[0039] Further, the filtration structure further comprises a water-stone separation filter layer 12, a drainage culvert 13, a filter screen 14, and a filter-proof layer 15, the water-stone separation filter layer 12 is arranged on the lower side of the buffer layer and the rockfall groove, the water-stone separation filter layer 12 is provided with the drainage culvert 13, the rear end of the drainage culvert 13 is inclined downward and penetrates through the blocking structure, the front end of the drainage culvert 13 is provided with the filter screen 14, and the filter-proof layer 15 is arranged below the water-stone separation filter layer 12.

[0040] The structure mainly realizes water and stone separation, and when arranged, the bottom of the buffer layer can be excavated and leveled first, a prefabricated culvert with a diameter of 60 cm is arranged (the structure of the pipeline is flexibly adjusted in size according to the size of the water flow in the ditch 2, and even can be changed into a culvert), the periphery and upper part of the culvert are backfilled with gravel soil to form a water and stone separation filter layer 12, a steel filter screen is arranged at the pipe opening, the size is a rectangle with the diameter of the culvert as the side length, the outside needs a filter layer 15 to guide the ditch water, and is not likely to be damaged by falling, so the water and stone separation filter layer 12 is filled with block stones.

[0041] Further, the water and stone separation filter layer 12 is composed of gravel blocks, and the filter layer 15 is composed of impermeable geotextile or a 20 cm thick concrete bottom plate; the structure is used for guiding ditch water.

[0042] Further, the filter screen 14 is a steel filter screen. Embodiment 2

[0043] Based on the above embodiment, the construction process of the passive blocking protection structure of the ditch source collapse and rolling stone is also provided, and specifically includes the following:

[0044] First, the pile-slab wall 3 and the gravity type check dam 4 are constructed, a drainage hole or a drainage hole is needed in the construction project, then the falling stone groove is excavated, the impermeable geotextile is laid on the groove bottom or the concrete bottom plate is poured, the block stones are thrown and filled on the groove bottom after pouring, if the gravity type check dam 4 is constructed, the culvert is installed therein, if the pile-slab wall 3 is constructed, the steel grating 8 is installed under the bottom baffle 6 after the baffle 6 is installed, the block stones are blocked, after installation, the upper part is backfilled with gravel blocks, then the buffer layer is constructed, finally, the dry-laid stone with a thickness of 40 cm is laid on the buffer layer.

[0045] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure reference in the claims should not be regarded as limiting the involved claims.

[0046] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A passive rockfall barrier structure for preventing landslides at gullies, characterized in that: The structure includes a multi-level retaining structure set in the ditch (2) and a buffer infiltration structure set inside the retaining structure. The retaining structure also includes a pile-slab wall (3) and a gravity dam (4). The pile-slab wall (3) is set at the lower part or end of the ditch (2) where the ditch source collapses. The ditch (2) in front of the pile-slab wall (3) is distributed with multiple gravity dams (4). The retaining structure can also be entirely set as a pile-slab wall (3) or a gravity dam (4). The retaining structure can also be alternately set as a pile-slab wall (3) and a gravity dam (4) according to the terrain. The buffer infiltration structure also includes a buffer layer, a rockfall trough, and an infiltration structure. A rockfall trough is set between the lower front side of the buffer layer and the slope of the ditch (2). The bottom of the rockfall trough is set with an infiltration structure that can separate water and rocks and connect to the back side of the gravity dam (4).

2. The passive barrier and protection structure for gully-source landslides and falling rocks according to claim 1, characterized in that: The pile wall (3) also includes anti-slide piles (5) and baffles (6). The anti-slide piles (5) can be made of square bricks with a diameter of 1.25×1.5m, a pile spacing of 4~5m, a pile length of 10~15m, and an exposed length of 5~6m. The baffles (6) can be made of single-layer toe or prefabricated baffles (6) with a diameter of 0.5×1×5m. Legs (7) supporting the baffles (6) are provided on the anti-slide piles (5) below the bottom baffles (6).

3. The passive barrier and protection structure for gully-source landslides and falling rocks according to claim 1, characterized in that: A steel bar grid (8) is provided on the part of the ditch (2) not blocked by the lower side baffle (6) in the middle of the pile wall (3), and a layer of crushed stone (9) is provided on the front side of the steel bar grid (8).

4. The passive barrier and protection structure for gully-source landslides and falling rocks according to claim 1, characterized in that: The gravity-type valley dam (4) adopts a structure that is deep at the rear and shallow at the front. The slope ratio of the front side of the wall is 1:0.35, the slope ratio of the rear side is 1:0.1, the top width of the wall is 1.5m, and the wall material is M10 mortar masonry.

5. The passive barrier and protection structure for gully-source landslides and rockfalls according to claim 1, characterized in that: The height of the buffer layer is consistent with the effective height of the barrier structure, and it is set in a trapezoidal shape with a top width of 1.2~2m. The slope backfill of the buffer layer is 1:0.

75.

6. The passive barrier and protection structure for gully-source landslides and rockfalls according to claim 1, characterized in that: The buffer layer also includes an inner buffer layer (10) and an outer buffer layer (11). The inner buffer layer (10) is a crushed stone and clay layer, and the outer buffer layer (11) is a 40cm thick dry-laid stone or block stone layer.

7. The passive barrier and protection structure for gully-source landslides and rockfalls according to claim 1, characterized in that: The infiltration structure also includes a water-stone separation filter layer (12), a drainage culvert (13), a filter screen (14), and a filter barrier layer (15). The water-stone separation filter layer (12) is located below the buffer layer and the rockfall trough. The drainage culvert (13) is located in the water-stone separation filter layer (12), and the rear end of the drainage culvert (13) is inclined downward through the barrier structure. The front end of the drainage culvert (13) is provided with a filter screen (14), and the filter barrier layer (15) is located below the water-stone separation filter layer (12).

8. The passive barrier and protection structure for gully-source landslides and rockfalls according to claim 7, characterized in that: The water-stone separation filter layer (12) is made of crushed stone blocks, and the filter layer (15) is made of impermeable geotextile or a 20cm thick concrete base plate.

9. A passive barrier structure for preventing rockfalls at the source of a gully, as described in claim 7, characterized in that: The filter screen (14) is configured as a steel reinforcement filter screen.

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