WO2021097938A1

WO2021097938A1 - Drainage system along river slope

Info

Publication number: WO2021097938A1
Application number: PCT/CN2019/123249
Authority: WO
Inventors: 姚仿英; 周娟如
Original assignee: 桐乡市倍特科技有限公司
Priority date: 2019-11-23
Filing date: 2019-12-05
Publication date: 2021-05-27
Also published as: CN110805051A; CN110805051B; ZA202201717B

Abstract

Proposed by the present invention is a drainage system along a river slope, comprising a drilling hole, a drainage pipe, a recovery device and so on. The river bank slope is drilled to form a downwardly inclined drilling hole. The drainage pipe is placed in the drilling hole, the water inlet thereof is at the bottom part of the drilling hole, and the water outlet thereof is connected to the recovery device. The recovery device is placed in river water. The recovery device is fixed to the bottom part of a river bed. An oval diaphragm bin is provided between a water storage chamber and an upper chamber. A diaphragm is provided in the oval diaphragm bin. The water storage chamber and the upper chamber are separated by the diaphragm. The oval diaphragm bin has a grid gap. A ball valve has density greater than that of water. A rotating shaft is installed in a lower chamber and has a concave shape. One end of the rotating shaft is connected to an outer casing, and the other end of the rotating shaft extends out of the outer casing to connect to a blade. A runner is provided on the rotating shaft. A connecting rod is connected between the runner and a plug body. The upper chamber and the lower chamber are separated by the plug body. The diaphragm may enable precipitated sediment in a siphon tube to fall between the plug body and the outer casing, thereby preventing the sediment from blocking the plug body and preventing the recovery device from losing the effect thereof.

Description

A drainage system along the river slope

Technical field

The invention belongs to the field of geotechnical engineering, and particularly relates to a drainage system and method along a river slope.

The construction of infrastructure such as highways, railways, and water conservancy facilities will form long subgrade slopes. Slope landslides along the river will not only affect traffic safety, but also cause barrier lakes. Therefore, the stability and safety of subgrade slopes is of paramount importance. However, the slope groundwater has a great correlation with the slope stability. The rise of the groundwater level causes the bulk density of the landslide body to increase, the effective stress of the slope surface decreases, and the shear strength decreases, which in turn leads to the instability of the landslide. For a slope, when the water level in front of the slope drops rapidly, the groundwater in the slope seeps to the outside of the slope, generating seepage force, increasing the sliding force, and promoting the instability of the landslide. Therefore, timely drainage of groundwater from the slope and maintaining the stability of the groundwater level are extremely critical for preventing landslide disasters and emergency treatment.

Among the slope drainage methods commonly used in geotechnical engineering: horizontal gravity drainage is low in efficiency, requires a long drill hole, and will cause blockage when used for a long time; underground drainage tunnel construction is complicated, the amount of work is large, and the cost is high; water collection wells are pumped A durable power source is required, and maintenance is difficult. In view of the existing slope drainage methods, some experts have proposed siphon drainage technology. The slope siphon drainage method has the advantages of convenient drainage hole arrangement, strong water collection capacity, good drainage effect, small drilling length required, and fast construction speed. However, in projects that use the siphon drainage method, the groundwater level decreases during the drought and rainy season, and there is no water on the slope that needs to be drained through the siphon effect. The siphon drainage system will be in a stopped working state, and the air dissolved in the water will be air bubbles. The form of siphon will gradually precipitate, and air will continue to accumulate in the siphon, which will reduce the vacuum in the siphon. When the rain comes again, it will be difficult for the siphon to start again or even disappear, and the drainage effect of the slope will be reduced.

Summary of the invention

The present invention addresses the defects that when the siphon drainage method in the prior art is used for drainage along the river slope, the siphon effect is suspended due to the drop of groundwater level, the vacuum degree in the siphon pipe is reduced, and the siphon effect is difficult to recover by itself. Combining the characteristics of the slope along the river, a drainage system and method suitable for the slope along the river are proposed. The water flow along the slope of the river is used to provide power. After the siphon effect is stopped, the air accumulated in the siphon can be removed to increase the siphon's capacity. Vacuum, restore the siphon effect to start the drainage process.

The technical scheme of the present invention is: a drainage system along the river slope, including a borehole, a siphon pipe, and a recovery device. The down-dip borehole is formed by drilling on the river bank slope, and a siphon pipe is placed in the borehole, and the water inlet of the siphon pipe is in the drill hole. At the bottom of the hole, the water outlet of the siphon pipe is connected with the recovery device. The diameter of the siphon pipe is 4mm. The recovery device is placed in the river water, and the recovery device is fixed to the bottom of the river bed. The recovery device includes ball valve chamber A, ball valve chamber B, ball valve A, ball valve B, Outlet pipe A, outlet pipe B, outlet pipe C, paddle, shaft, runner, connecting rod, plug body, shell, upper chamber, lower chamber, oval diaphragm compartment, diaphragm, water storage chamber, ball valve chamber A , Ball valve chamber B is connected with the water storage chamber, ball valve A and ball valve B are respectively placed in ball valve chamber A and ball valve chamber B, the siphon pipe is connected with ball valve chamber A, the outlet pipe A is connected between the siphon pipe and the lower chamber, and the outlet pipe B Connected to the ball valve chamber B, the outlet pipe C is connected to the bottom of the lower chamber, the outlet pipe C is set below the lowest water level of the river, an oval diaphragm silo is set between the water storage chamber and the upper chamber, and a diaphragm is set in the oval diaphragm silo The diaphragm separates the water storage chamber and the upper chamber. The oval diaphragm chamber has a grid gap. The density of ball valve A and ball valve B is greater than water. The shaft is installed in the lower chamber. The shaft is in a concave shape. One end of the shaft is connected to the shell. Connected, the other end of the rotating shaft extends out of the shell to connect with the blade, the rotating wheel is arranged on the rotating shaft, and the connecting rod is connected between the rotating wheel and the plug body, and the upper chamber and the lower chamber are separated by the plug body.

Furthermore, a plurality of said drainage systems along the river slope can be arranged on the river slope.

Further, the vertical distance between the orifice of the borehole and the bottom of the borehole is higher than the height of the water column corresponding to the local atmospheric pressure by more than 2m, and the diameter of the borehole is greater than 75mm.

Further, one or more siphon tubes are provided, and one or more restoring devices are provided.

Further, the recovery device is made of corrosion-resistant materials.

Further, the siphon tube adopts a PU tube or a PA tube.

A drainage method along a river slope includes the following steps:

(1) Through the investigation of the engineering geological conditions of the slope, analyze the depth of the groundwater level of the slope and the groundwater level line that needs to be controlled, and drill down-dipping boreholes to enter the slope below the safe groundwater level line; the boreholes can be in the slope Set up at different positions of the surface, and determine according to factors such as the type of slope rock and soil, the slope, the rainfall characteristics of the slope area, and the construction method;

(2) Put one end of the siphon pipe into the borehole, and put the other end of the siphon pipe in the river water. Fill the siphon pipe in the reverse direction. After the gas in the siphon pipe is discharged, stop the reverse irrigation, and then connect the other end of the siphon pipe to the recovery device, and then The restoration device is fixedly connected to the river bed, and the slope groundwater flows through the siphon, outlet pipe A, lower chamber, and outlet pipe C to be discharged into the river;

(3) After rainfall occurs, the water level of the river rises, and the blades are rotated by the impact of the water flow, driving the shaft and the plug body to move, the plug body moves downwards, the upper chamber forms a negative pressure, the diaphragm moves downwards, and the pressure of the water storage chamber decreases. Small, ball valve A moves upwards, ball valve B moves downwards, the gas in the siphon tube is sucked into the water storage chamber, the plug body moves upwards, the pressure in the upper chamber increases, and the pressure in the water storage chamber increases, ball valve A moves downwards, ball valve B moves upward, the gas in the water storage chamber is discharged from the outlet pipe B, the air accumulated in the siphon pipe is continuously discharged, the vacuum degree of the siphon pipe increases, the siphon effect is restored, and the slope is normally siphoned and drained;

(4) The water level of the river rises and the paddles are submerged, the plug stops moving, and the slope groundwater flows through the siphon, outlet pipe A, lower chamber, and outlet pipe C to be discharged into the river;

(5) Rainfall occurs again, the river water level rises, and the above process is repeated.

The advantages of the present invention are as follows:

1. The present invention utilizes blades to convert water flow energy into plug movement kinetic energy, suck out the air accumulated in the siphon, increase the vacuum in the siphon, provide power for the siphon effect, and provide guarantee for the self-recovery of the siphon effect.

2. The present invention uses hydrodynamic force to start the siphon effect, without external force and manual operation.

3. The function of the present invention can be synchronized with the rise of the river water level as the rainfall occurs, and the recovery device can stop working as the river water level is submerged.

4. The diaphragm of the present invention can place the sediment from the siphon tube to fall between the plug body and the shell, preventing the sediment from blocking the plug body and avoiding the recovery device from losing its effect.

5. The present invention utilizes the pressure difference created by the river power to provide greater suction, and can regularly remove the sediment in the siphon tube to prevent the siphon tube from being clogged.

Description of the drawings

Figure 1 is an overall schematic diagram of the present invention;

Figure 2 is a schematic diagram of the downward movement of the plug body of the recovery device of the present invention;

Figure 3 is a schematic diagram of the upward movement of the plug body of the recovery device of the present invention;

Figure 4 is a schematic diagram of the shutdown state of the present invention;

In the figure: along the river slope 1, borehole 2, siphon 3, groundwater level 4, recovery device 5, ball valve chamber A 51, ball valve chamber B 52, ball valve A 53, ball valve B 54, outlet pipe A 55, outlet pipe B 56. Outlet pipe C 57, paddle 58, shaft 59, runner 60, connecting rod 61, plug 62, housing 63, upper chamber 64, lower chamber 65, oval diaphragm compartment 66, diaphragm 67, storage Water chamber 68, river water level 7.

Detailed ways

The present invention will be further explained below in conjunction with specific embodiments. It should be understood that the embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

As shown in Figure 1-4, a drainage system along the river slope is proposed, which includes a borehole 2, a siphon pipe 3, and a recovery device 5. A downwardly inclined borehole 2 is formed by drilling on the river bank slope 1 and placed in the borehole 2. The siphon 3, the water inlet of the siphon 3 is at the bottom of the borehole 1, the water outlet of the siphon 3 is connected to the recovery device 5. The diameter of the siphon 3 is 4mm, the recovery device 5 is placed in the river water, and the recovery device 5 is fixed to the bottom of the river bed to recover Device 5 includes ball valve chamber A 51, ball valve chamber B 52, ball valve A 53, ball valve B 54, outlet pipe A 55, outlet pipe B 56, outlet pipe C 57, blade 58, shaft 59, runner 60, and connecting rod 61 , Plug body 62, housing 63, upper chamber 64, lower chamber 65, oval diaphragm chamber 66, diaphragm 67, water storage chamber 68, ball valve chamber A 51, ball valve chamber B 52 are connected to water storage chamber 68, ball valve A 53. The ball valve B 54 is respectively placed in the ball valve chamber A 51 and the ball valve chamber B 52, the siphon 3 is connected to the ball valve chamber A 51, the outlet pipe A 55 is connected between the siphon 3 and the lower chamber 64, and the outlet pipe B 56 is connected to the ball valve The chamber B 54 is connected, the outlet pipe C 57 is connected to the bottom of the lower chamber 65, the outlet pipe C 57 is set below the lowest water level of the river, and an oval diaphragm silo 66 is set between the water storage chamber 68 and the upper chamber 64, which is oval. A diaphragm 67 is arranged in the diaphragm compartment 66. The diaphragm 67 separates the water storage chamber 68 from the upper chamber 64. The oval diaphragm compartment 66 has a grid gap. The density of the ball valve A and the ball valve B is greater than that of water. The rotating shaft 59 is installed in the lower chamber. 65, the rotating shaft 59 is in a concave shape, one end of the rotating shaft 59 is connected to the housing 63, the other end of the rotating shaft 59 extends out of the housing 63 and is connected to the blade 58, the runner 60 is arranged on the rotating shaft 59, and the connecting rod 61 is connected to the runner 60 Between the plug body 62 and the upper chamber 64 and the lower chamber 65 are separated by the plug body 62. Multiple drainage systems along the river slope can be installed on the river slope 1. The vertical distance between the hole of the borehole 2 and the bottom of the borehole is more than 2m higher than the height of the water column corresponding to the local atmospheric pressure, and the diameter of the borehole 2 is greater than 75mm. One or more siphon tubes 3 are provided, and one or more recovery devices 5 are provided. The restoration device 5 is made of corrosion-resistant materials. The siphon 3 adopts a PU tube or a PA tube.

A drainage method along a river slope includes the following steps:

(1) Through the investigation of the engineering geological conditions of the slope, analyze the depth of the groundwater level of the slope and the groundwater level 4 that needs to be controlled, and set the downwardly inclined borehole 2 to enter the safe groundwater level 4 below the slope; the borehole 2 It can be set up at different positions on the slope, and determined according to factors such as the type of slope rock and soil, the slope, the rainfall characteristics of the slope area, and the construction method;

(2) Put one end of the siphon tube 3 into the borehole 2, and place the other end of the siphon tube 3 in the river water, and pour water into the siphon tube 3 in the reverse direction. After the gas in the siphon tube 3 is discharged, stop the reverse irrigation, and then put the other end of the siphon tube 3 Connect to the recovery device 5, and then fix the recovery device 5 to the river bed. The slope groundwater flows through the siphon 3, the outlet pipe A 55, the lower chamber 64, and the outlet pipe C 57 to the river;

(3) After rainfall occurs, the river water level 7 rises, the blade 58 is impacted by the water flow and rotates, driving the shaft 59 and the plug body 62 to move, the plug body 62 moves downwards, the upper chamber 64 forms a negative pressure, and the diaphragm 67 moves downwards. Movement, the pressure of the water storage chamber 68 decreases, the ball valve A 53 moves upwards, and the ball valve B 54 moves downwards. The gas in the siphon 3 is sucked into the water storage chamber 68, the plug 62 moves upwards, and the pressure of the upper chamber 64 increases. The pressure in the water storage chamber 68 increases, the ball valve A 51 moves downwards, and the ball valve B 52 moves upwards. The gas in the water storage chamber 68 is discharged from the water outlet pipe B 56. The air accumulated in the siphon pipe 3 is continuously discharged, and the siphon pipe 3 has a vacuum degree. Increase, the siphon effect is restored, and the slope is normally siphoned and drained;

(4) The river water level 7 rises and submerges the blade 58, the plug 62 stops moving, and the slope groundwater flows through the siphon 3, the outlet pipe A 55, the lower chamber 65, and the outlet pipe C 57 to be discharged into the river;

(5) Rainfall occurs again, the river water level 7 rises, and the above process is repeated.

Summary of the invention

technical problem

The solution to the problem

The beneficial effects of the invention

Claims

A drainage system along the river slope, which is characterized in that it includes a borehole, a siphon pipe, and a recovery device. A downwardly inclined borehole is formed by drilling on the river bank slope. A siphon is placed in the borehole, and the water inlet of the siphon is at the bottom of the borehole. , The outlet of the siphon is connected with the recovery device, the diameter of the siphon is 4mm, the recovery device is placed in the river water, the recovery device is fixed to the bottom of the river bed, the recovery device includes ball valve chamber A, ball valve chamber B, ball valve A, ball valve B, and water outlet pipe A , Outlet pipe B, outlet pipe C, paddle, shaft, runner, connecting rod, plug body, shell, upper chamber, lower chamber, oval diaphragm chamber, diaphragm, water storage chamber, ball valve chamber A, ball valve chamber B is connected to the water storage chamber, the ball valve A and ball valve B are respectively placed in the ball valve chamber A and the ball valve chamber B, the siphon pipe is connected to the ball valve chamber A, the outlet pipe A is connected between the siphon pipe and the lower chamber, and the outlet pipe B is connected to the ball valve chamber. B connection, the outlet pipe C is connected to the bottom of the lower chamber. The outlet pipe C is set below the lowest water level of the river. An oval diaphragm chamber is set between the water storage chamber and the upper chamber. A diaphragm is set in the oval diaphragm chamber. The water storage chamber is separated from the upper chamber. The oval diaphragm compartment has a grid gap. The density of ball valve A and ball valve B is greater than that of water. The shaft is installed in the lower chamber. The shaft is in a concave shape. One end of the shaft is connected to the shell. The other end extends out of the shell and is connected to the blade, the runner is arranged on the rotating shaft, and the connecting rod is connected between the runner and the plug body, and the upper chamber and the lower chamber are separated by the plug body.
The drainage system along the river slope according to claim 1, wherein a plurality of drainage systems along the river slope can be arranged along the river slope.
The drainage system along the river slope according to claim 1, wherein the vertical distance between the hole of the borehole and the bottom of the borehole is more than 2m higher than the height of the water column corresponding to the local atmospheric pressure. The diameter is greater than 75mm.
The drainage system along the river slope according to claim 1, wherein one or more siphon pipes are provided, and one or more restoration devices are provided.
The drainage system along the river slope according to claim 1, wherein the restoration device is made of corrosion-resistant materials.
The drainage system along the river slope according to claim 4, wherein the siphon pipe is a PU pipe or a PA pipe.