Underground drainage system suitable for landslide geological disasters

Abstract

The invention relates to the technical field of drainage engineering, in particular to an underground drainage system suitable for landslide geological disasters. The system comprises an inclined drain hole, a siphon, a water collecting well and an inclined drain hole. The inclined drainage hole is formed in the slope surface, the siphon is inserted into the inclined drainage hole, and the end of the siphon extends into the water collecting well. And the inclined drainage hole is formed below the slope surface, is communicated with the water collecting well and finally extends to the slope toe. The water collecting well comprises a well pipe, a water filtering pipe and a water collecting pipe, a drainage interlayer is formed between the water filtering pipe and the water collecting pipe, and the siphon is located in the drainage interlayer. In addition, the system further comprises a retainer and a settling well, and stability and long-term effectiveness of the drainage system are guaranteed. By optimizing the drainage path and the structural design, the underground water drainage efficiency of the landslide geological area is effectively improved, and the landslide risk caused by underground water accumulation is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of drainage engineering, and in particular to an underground drainage system suitable for landslide geological disasters. Background Art

[0002] Landslide is a common geological disaster with great harm. Groundwater has a great influence on the stability of landslide, so underground drainage is the key and difficulty in landslide control. At present, there are many kinds of drainage projects for landslide, which are mainly divided into two methods: surface drainage and underground drainage.

[0003] 1. Surface drainage, using drainage ditches outside the slope and drainage ditches inside the slope to prevent surface water from seeping in and causing landslides. However, this drainage method cannot drain groundwater. When the groundwater level is too high, it will still cause landslides.

[0004] 2. Underground drainage, generally using vertical water collection wells and underground drainage holes, is generally used to drain groundwater from slopes with good permeable layers. Groundwater is led to the water collection well through radial upward-inclined drainage holes, and then the water is discharged from the slope.

[0005] However, at present, although the vertical water collection well can effectively collect groundwater, the drainage efficiency is still low. Although the underground drainage hole can drain water in time, it is easy to be blocked by the accumulation of impurities such as silt. Therefore, the above scheme still has shortcomings and needs further improvement. Summary of the invention

[0006] The present application provides an underground drainage system suitable for landslide geological disasters, which can effectively achieve rapid water collection and rapid drainage, and has the characteristics of high stability and not easy to be blocked. The following technical solutions are adopted: An underground drainage system suitable for landslide geological disasters, comprising a downward-inclined drainage hole, a siphon, a water collection well and an upward-inclined drainage hole; The downward-inclined drainage hole is arranged at the slope surface, and the siphon pipe is inserted into the downward-inclined drainage hole; the water collection well is arranged below the slope surface and between the downward-inclined drainage hole and the slope foot, and the end of the siphon pipe extends into the water collection well; The upward inclined drainage hole is arranged below the slope surface and between the water collection well and the foot of the slope, and one end of the drainage hole is connected with the water collection well, and the other end extends to the foot of the slope.

[0007] By adopting the above technical solution, groundwater is collected through a water collection well, and the groundwater is sucked and discharged into the water collection well by a siphon, thereby effectively improving the collection efficiency of groundwater. After the groundwater is collected, it is quickly drained through the upward-inclined drainage hole. Since the groundwater entering the water collection well has less debris, the drainage hole is not easy to be blocked when it is drained through the upward-inclined drainage hole. In this way, the rapid drainage of groundwater in landslide geology can be achieved, and it has high stability and is not easy to be blocked.

[0008] Preferably, the water collection well comprises a well pipe and a water filter pipe; the water filter pipe is arranged inside the well pipe, and filter material is filled between the water filter pipe and the well pipe; through holes are opened on the side walls of the well pipe and the water filter pipe to allow groundwater to flow into the water collection well.

[0009] By adopting the above technical solution, the filter material can preliminarily filter the groundwater entering the water collection well, thereby reducing the sediment content in the groundwater, thereby reducing the probability of clogging of the inclined drainage holes, and can quickly collect groundwater into the water collection well.

[0010] Preferably, the water collection well further comprises a water collection pipe, which is arranged inside the water filter pipe and in the same direction as the water filter pipe; a drainage interlayer is formed between the water collection pipe and the water filter pipe; The water collecting pipe comprises a pipe wall and a pipe bottom, wherein the pipe bottom extends to the outside of the water collecting pipe and is fixedly connected to the side wall of the water filter pipe, and a plurality of through holes are evenly arranged on the pipe wall; the connecting end of the upward inclined drainage hole and the water collecting well is located in the drainage interlayer.

[0011] By adopting the above technical solution, a water collecting pipe is set up and a drainage interlayer is formed in the water collecting pipe and the water filter pipe, so that the groundwater can be discharged through the inclined drainage pipe in time after infiltrating into the water collecting well, so as to reduce the deposition of silt in the groundwater in the water collecting well, which is suitable for seasons with low precipitation and low groundwater level. In seasons with high precipitation and high groundwater level, groundwater can also be collected in the water collecting well, and at this time, the drainage pipe can perform secondary filtration on the groundwater in the water collecting well through the through hole, so as to prevent large particles of impurities from entering the inclined drainage hole and causing the drainage hole to be blocked. In order to further improve the filtering effect, filter material can be filled in the drainage interlayer.

[0012] Preferably, a water collecting trough is formed between the pipe bottom and the water filter pipe, and the connecting end between the upward inclined drainage hole and the water collecting well is located in the water collecting trough.

[0013] By adopting the above technical solution, the provision of a water collection trough helps groundwater to be collected at the inclined drainage holes after infiltrating into the water collection well, thereby improving drainage efficiency.

[0014] Preferably, one end of the siphon tube located in the water collection well extends to the bottom of the tube and is located inside the drainage interlayer.

[0015] By adopting the above technical solution, the siphon tube is arranged inside the drainage interlayer, so that the water collecting pipe can play a certain protective role on the siphon tube, which can effectively reduce the probability of blockage.

[0016] Preferably, it also includes a retaining frame, which includes a fixing frame and a suspension frame, wherein the fixing frame is arranged above the water collecting pipe and abuts against the upper end of the water collecting pipe; the suspension frame is arranged on the lower side of the fixing frame and is fixedly connected to the fixing frame; the siphon pipe is passed through the fixing frame and the suspension frame.

[0017] By adopting the above technical solution, the retaining frame can fix the siphon pipe, thereby reducing the probability of damage to the siphon pipe. The fixing frame can be directly installed on the top of the water collecting pipe, which is highly convenient and reduces the construction difficulty and cost.

[0018] Preferably, a sedimentation well is further provided below the water collection well, an anti-siltation net is provided at the bottom of the water collection pipe, and the anti-siltation net cover is provided above the sedimentation well and fixedly connected to the water collection pipe.

[0019] By adopting the above technical solution, the sedimentation well is set below the water collection well to allow the impurities in the water collection well to settle, thereby reducing the probability of blockage when groundwater is discharged from the upward-inclined drainage hole. The anti-siltation net can prevent the silt in the sedimentation well from surging into the water collection well under the action of the groundwater flow when the groundwater surges, thereby preventing the silt from clogging the upward-inclined drainage hole.

[0020] Preferably, a drainage pipe is further provided in the upward-inclined drainage hole, and the drainage pipe comprises a plurality of branch pipes arranged in parallel, and the branch pipes extend into the water collection well; one end of the branch pipe located in the water collection well is detachably connected with a plugging piece.

[0021] By adopting the above technical solution, the opening or closing of each branch pipe can be adjusted by controlling the plugging parts. When the rainfall is small, the groundwater level is low, and the drainage pressure is small, a single or part of the branch pipes can be opened. When the rainfall is large, the groundwater level is high, and the drainage pressure is large, multiple branch pipes can be opened at the same time to improve the drainage efficiency. In addition, when a single branch pipe is blocked, the other branches can still work normally to ensure normal drainage.

[0022] Preferably, the blocking member includes a blocking plate and a lifting rod, wherein the blocking plate cooperates with the end of the branch pipe to achieve blocking of the branch pipe; one end of the lifting rod is connected to the blocking plate, and the other end is located at the wellhead of the water collection well.

[0023] By adopting the above technical solution, the blocking plate can be opened and closed by operating the lifting rod, which is easy to operate. The lifting rod can also be replaced by a rope.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects: 1. This application uses a water collection well to collect groundwater, and at the same time, the groundwater is sucked by a siphon and discharged into the water collection well, thereby effectively improving the collection efficiency of groundwater. After the groundwater is collected, it is quickly drained through the upward-inclined drainage hole. Since the groundwater entering the water collection well has less debris, the drainage hole is not easy to be blocked when it is drained through the upward-inclined drainage hole. In this way, the rapid drainage of groundwater in landslide geology can be achieved, and it has high stability and is not easy to be blocked; 2. By setting up a water collection pipe and forming a drainage interlayer in the water collection pipe and the water filter pipe, the groundwater can be discharged through the inclined drainage pipe in time after infiltrating into the water collection well, so as to reduce the sedimentation of groundwater in the water collection well. It is suitable for seasons with small precipitation and low groundwater level. In seasons with large precipitation and high groundwater level, groundwater can also be collected in the water collection well. At this time, the drainage pipe can perform secondary filtration on the groundwater in the water collection well through the through hole to prevent large particles of impurities from entering the inclined drainage hole and causing blockage of the drainage hole. In order to further improve the filtering effect, filter material can be filled in the drainage interlayer; 3. By controlling the plugging parts, the opening or closing of each branch pipe can be adjusted. When the rainfall is small, the groundwater level is low, and the drainage pressure is small, a single or part of the branch pipes can be opened. When the rainfall is heavy, the groundwater level is high, and the drainage pressure is high, multiple branch pipes can be opened at the same time to improve the drainage efficiency. In addition, when a single branch pipe is blocked, other branches can still work normally to ensure normal drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the underground drainage system in the embodiment of the present application; Figure 2 It is a schematic diagram of the structure of the siphon, the water collection well and the upward-inclined drainage hole in Example 1 of the present application; Figure 3 It is a schematic diagram of the structure of the siphon, water collection well and inclined drainage hole in Example 2 of the present application.

[0026] Markings in the attached drawings: 1. inclined drainage hole; 2. siphon; 3. water collection well; 31. well pipe; 32. filter pipe; 33. water collection pipe; 331. pipe wall; 332. pipe bottom; 34. drainage interlayer; 4. inclined drainage hole; 5. retaining frame; 51. fixing frame; 52. suspension frame; 53. fixing block; 6. sedimentation well; 7. anti-siltation net; 8. slope foot; 9. slope surface. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3 The present invention is described in further detail.

[0028] Example 1 An underground drainage system suitable for landslide geological disasters provided in the embodiment of the present application is referred to Figure 1 , which includes a downward-inclined drainage hole 1, a siphon 2, a water collection well 3 and an upward-inclined drainage hole 4. Among them, the downward-inclined drainage hole 1 is arranged at the slope surface, and the siphon 2 is inserted in the downward-inclined drainage hole 1; the water collection well 3 is arranged below the slope surface and between the downward-inclined drainage hole 1 and the foot of the slope, and the end of the siphon 2 extends into the water collection well 3; the upward-inclined drainage hole 4 is arranged below the slope surface and between the water collection well 3 and the foot of the slope, and one end thereof is connected to the water collection well 3, and the other end extends to the foot of the slope. Through this structure, rapid water collection and rapid drainage can be effectively achieved, and it has the characteristics of high stability and not easy to be blocked.

[0029] Reference Figure 2 Furthermore, the water collection well 3 includes a well pipe 31 and a water filter pipe 32. The well pipe 31 is made of concrete or steel, and the water filter pipe 32 is arranged inside the well pipe 31. The filter pipe 32 and the well pipe 31 are filled with filter material to filter the silt in the groundwater. Through holes are provided on the side walls of the well pipe 31 and the water filter pipe 32 to allow groundwater to flow into the water collection well 3. The filter material can be made of materials such as granite gravel, which has a good filtering effect on impurities such as silt, so as to reduce the sand content of groundwater after entering the water collection well 3.

[0030] The siphon pipe 2 is inserted below the slope along the inclined drainage pipe, and the depth needs to reach below the groundwater level. The siphon pipe 2 extends from the top of the slope to the water collection well 3, and the length of the siphon pipe 2 between the top of the slope and the water collection well 3 should not be too long, otherwise it will affect the siphon effect. The part of the siphon pipe 2 located in the water collection well 3 extends to the bottom side of the water collection well 3 to ensure sufficient siphon effect.

[0031] The upward inclined drainage hole 4 includes a plurality of boreholes of different diameters, which are arranged obliquely below the slope surface to facilitate the outflow of groundwater from the water collection well 3. The length of the upward inclined drainage hole 4 is determined according to actual needs to ensure that groundwater can be discharged smoothly.

[0032] The implementation principle of this embodiment is: through the combination of the inclined drainage hole 1 and the siphon 2, groundwater can be effectively introduced into the water collection well 3. The design of the siphon 2 enables groundwater to be quickly sucked into the water collection well 3, thereby improving the water collection efficiency. The filter pipe 32 and filter material in the water collection well 3 can preliminarily filter the groundwater and remove most of the silt, thereby reducing the probability of clogging of the inclined drainage hole 4. Finally, the groundwater is discharged from the slope through the inclined drainage hole 4, achieving rapid drainage. The entire system has a simple structure, is easy to construct and maintain, and has high reliability and stability.

[0033] Example 2 The embodiment of the present application provides an underground drainage system suitable for landslide geological disasters, which is different from the above-mentioned embodiment in that the structure of the water collection well 3 is optimized.

[0034] Reference Figure 3 Specifically, the water collection well 3 includes a well pipe 31, a water filter pipe 32 and a water collection pipe 33. The water collection pipe 33 is arranged inside the water filter pipe 32 and arranged in the same direction as the water filter pipe 32, and a drainage interlayer 34 is formed between the water collection pipe 33 and the water filter pipe 32. The water collection pipe 33 includes a pipe wall 331 and a pipe bottom 332, and the pipe bottom 332 extends to the outside of the water collection pipe 33 and is fixedly connected to the side wall of the water filter pipe 32. A plurality of through holes are evenly arranged on the pipe wall 331. The connecting end of the upward-inclined drainage hole 4 and the water collection well 3 is located in the drainage interlayer 34.

[0035] Furthermore, the water collecting pipe 33 can be made of materials such as stainless steel and concrete, and the drainage interlayer 34 can also be filled with filter material to further purify the water quality. The pipe bottom 332 extends to the outside of the water collecting pipe 33 and can be integrally formed with the water filter pipe 32. A water collecting trough is formed between the pipe bottom 332 and the water filter pipe 32. The setting of the water collecting trough helps the groundwater to be collected at the inclined drainage hole 4 after infiltrating into the water collecting well 3, thereby improving the drainage efficiency.

[0036] Therefore, by setting the water collecting pipe 33 and the drainage interlayer 34 in the water collecting well 3, when the rainfall is small and the groundwater level is low, the groundwater is collected by the water collecting trough to the inclined drainage hole 4 after infiltrating into the water collecting well 3, thereby improving the drainage efficiency. At the same time, when the rainfall is large and the groundwater level is high, the water volume in the water collecting well 3 is large, and it can also be discharged into the drainage interlayer 34 through the pipe wall 331 and enter the inclined drainage hole 4. The whole system has higher stability and reliability, and is particularly suitable for areas with high groundwater levels and high sediment content.

[0037] Furthermore, a drainage pipe is arranged in the inclined drainage hole 4. Specifically, the drainage pipe includes a plurality of branch pipes arranged in parallel, and the branch pipes extend into the water collection well 3; one end of the branch pipe located in the water collection well 3 is detachably connected with a plugging member. The plugging member includes a plugging plate and a lifting rod, and the plugging plate cooperates with the end of the branch pipe to achieve the plugging of the branch pipe; one end of the lifting rod is connected to the plugging plate, and the other end is located at the wellhead of the water collection well 3.

[0038] Specifically, the drainage pipes are made of different materials, and the length of each branch pipe is determined according to actual needs. The branch pipes are connected by a connecting device to facilitate disassembly and replacement. The plugging plate is made of rubber, and the lifting rod is made of stainless steel. One end is connected to the plugging plate through a fixing device, and the other end is located at the wellhead of the water collection well 3, which can be operated manually or electrically.

[0039] Therefore, by setting up drainage pipes and plugging parts, the opening or closing of each branch pipe can be flexibly controlled. When the rainfall is small, the groundwater level is low, and the drainage pressure is small, a single or part of the branch pipes can be opened. When the rainfall is heavy, the groundwater level is high, and the drainage pressure is high, multiple branch pipes can be opened at the same time to improve the drainage efficiency. In addition, when a single branch pipe is blocked, other branches can be opened to ensure normal drainage. The setting of the plugging parts is easy to operate, and the length of the lifting rod can be adjusted according to actual needs to adapt to different construction site conditions. The entire system has high flexibility and reliability, and is particularly suitable for areas with large fluctuations in groundwater levels.

[0040] A sedimentation well 6 is also provided below the water collection well 3. Specifically, a sedimentation well 6 is provided below the water collection well 3, and an anti-siltation net 7 is provided at the bottom of the water collection pipe 33. The anti-siltation net 7 is covered above the sedimentation well 6 and fixedly connected to the water collection pipe 33.

[0041] Specifically, the sedimentation well 6 is made of concrete, and the anti-siltation net 7 is made of stainless steel. The anti-siltation net 7 is fixed to the bottom of the water collecting pipe 33 by a fixing device, covering the opening of the sedimentation well 6. The setting of the anti-siltation net 7 can prevent the silt in the sedimentation well 6 from surging into the water collecting well 3 under the action of the groundwater flow when the groundwater surges, thereby preventing the silt from clogging the upward-inclined drainage hole 4.

[0042] Furthermore, in order to ensure the stability of the siphon tube 2 and reduce the probability of the siphon tube 2 being bent and damaged due to the scouring of water flow in the water collection well 3, the present application adds a retaining frame 5 structure. Specifically, the retaining frame 5 includes a fixing frame 51 and a hanging frame 52, the fixing frame 51 is arranged above the water collection pipe 33 and abuts against the upper end of the water collection pipe 33, the hanging frame 52 is arranged on the lower side of the fixing frame 51 and is fixedly connected to the fixing frame 51, and the siphon tube 2 is passed through the fixing frame 51 and the hanging frame 52.

[0043] Specifically, the fixing frame 51 is made of steel structure, and fixing blocks 53 are provided at the four corners of the fixing frame 51, which are fixed by being inserted into the top of the water collecting pipe 33. The suspension frame 52 is made of stainless steel, and the suspension frame 52 is fixed to the lower side of the fixing frame 51 by a fixing device, and a hole is provided in the middle to fix the siphon tube 2. The siphon tube 2 is fixed to the suspension frame 52 by a fixing device to prevent the siphon tube 2 from being offset or damaged during use.

[0044] Therefore, by setting the retaining frame 5, the siphon 2 can be fixed, thereby reducing the probability of damage to the siphon 2. The fixing frame 51 is directly installed on the top of the water collecting pipe 33, which is highly convenient and reduces the construction difficulty and cost. The setting of the suspension frame 52 further enhances the stability of the siphon 2, especially when the groundwater flow is large, it can effectively prevent the siphon 2 from being deflected or broken due to the impact of water flow. The entire system has a compact structure, is easy to install and maintain, and has high reliability and stability.

[0045] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An underground drainage system suitable for landslide geological disasters, characterized by: It comprises a downward-inclined drainage hole (1), a siphon (2), a water collection well (3) and an upward-inclined drainage hole (4); The inclined drainage hole (1) is arranged at a slope surface, and the siphon pipe (2) is inserted into the inclined drainage hole (1); the water collection well (3) is arranged below the slope surface and between the inclined drainage hole (1) and the slope foot, and the end of the siphon pipe (2) extends into the water collection well (3); The upward-inclined drainage hole (4) is arranged below the slope surface and between the water collection well (3) and the foot of the slope, and one end of the drainage hole is connected to the water collection well (3) and the other end extends to the foot of the slope.

2. The underground drainage system suitable for landslide geological disasters according to claim 1 is characterized by: The water collection well (3) comprises a well pipe (31) and a water filter pipe (32); the water filter pipe (32) is arranged inside the well pipe (31), and filter material is filled between the water filter pipe (32) and the well pipe (31); through holes are provided on the side walls of the well pipe (31) and the water filter pipe (32) to allow groundwater to flow into the water collection well (3).

3. The underground drainage system suitable for landslide geological disasters according to claim 2 is characterized in that: The water collection well (3) further comprises a water collection pipe (33), wherein the water collection pipe (33) is arranged inside the water filter pipe (32) and is arranged in the same direction as the water filter pipe (32); a drainage interlayer (34) is formed between the water collection pipe (33) and the water filter pipe (32); The water collecting pipe (33) comprises a pipe wall (331) and a pipe bottom (332); the pipe bottom (332) extends to the outside of the water collecting pipe (33) and is fixedly connected to the side wall of the water filter pipe (32); a plurality of through holes are evenly arranged on the pipe wall (331); and the connecting end of the upward-inclined drainage hole (4) and the water collecting well (3) is located in the drainage interlayer (34).

4. The underground drainage system suitable for landslide geological disasters according to claim 3 is characterized by: A water collecting trough is formed between the pipe bottom (332) and the water filter pipe (32), and the communicating end between the upward-inclined drainage hole (4) and the water collecting well (3) is located in the water collecting trough.

5. The underground drainage system suitable for landslide geological disasters according to claim 3 is characterized by: One end of the siphon tube (2) located in the water collection well (3) extends to the bottom of the tube (332) and is located inside the drainage interlayer (34).

6. The underground drainage system suitable for landslide geological disasters according to claim 3 is characterized by: It also comprises a retaining frame (5), the retaining frame (5) comprising a fixing frame (51) and a suspension frame (52), the fixing frame (51) being arranged above the water collecting pipe (33) and abutting against the upper end of the water collecting pipe (33); the suspension frame (52) being arranged on the lower side of the fixing frame (51) and fixedly connected to the fixing frame (51); and the siphon pipe (2) being passed through the fixing frame (51) and the suspension frame (52).

7. The underground drainage system suitable for landslide geological disasters according to claim 3 is characterized by: A sedimentation well (6) is also provided below the water collection well (3), and an anti-siltation net (7) is provided at the bottom of the water collection pipe (33); the anti-siltation net (7) is provided above the sedimentation well (6) and is fixedly connected to the water collection pipe (33).

8. The underground drainage system suitable for landslide geological disasters according to claim 1 is characterized by: A drainage pipe is also provided in the upward-inclined drainage hole (4), and the drainage pipe comprises a plurality of branch pipes arranged in parallel, and the branch pipes extend into the water collection well (3); one end of the branch pipe located in the water collection well (3) is detachably connected to a plugging piece.

9. The underground drainage system suitable for landslide geological disasters according to claim 8, characterized in that: The plugging member comprises a plugging plate and a lifting rod, wherein the plugging plate cooperates with the end of the branch pipe to achieve plugging of the branch pipe; one end of the lifting rod is connected to the plugging plate, and the other end is located at the wellhead of the water collection well (3).

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