A tunnel construction anti-slope automatic control siphon drainage method

Abstract

This invention discloses an automatic control siphon drainage method for reverse slope tunnel construction. During construction, construction water from the tunnel face and lower bench is pumped to a wastewater storage tank. After sedimentation, it naturally flows into a clear water tank. When the water level in the clear water tank reaches a certain height, a water level sensor sends a signal, triggering a remotely controlled automatic pump to start operating. Simultaneously, the system automatically closes the gate valve at the lowest point of the external drainage pipe, opens the automatic gate valve at the pump, and automatically opens and closes the gate valve on the connecting pipe at the highest point of the drainage pipe. When water overflows the entire pipe and spills from the connecting pipe at the highest point, triggering the water level sensor, the gate valve at the highest point automatically closes, while the remotely controlled gate valve at the lowest point outside the tunnel automatically opens and the pump shuts down, forming an automatic siphon drainage system. The entire process is controlled by water level sensors installed in the clear water tank and the connecting pipe at the highest point of the pipeline, which control the pump and the opening and closing of the three gate valves, thus forming an automatic control siphon drainage system.

Description

Technical Field

[0001] This invention relates to the field of drainage in tunnel construction, specifically to an automatic control siphon drainage method for reverse slope in tunnel construction. Background Technology

[0002] During tunnel construction, reverse slope pumping and drainage are often required, which presents the problem of high electricity costs for pumping and drainage. Traditional construction methods use high-power pumping equipment to pump water throughout the entire process for drainage. This method is simple and easy to implement, but it is expensive. Summary of the Invention

[0003] Therefore, to address the issue of high pumping costs and improve the drainage system, this paper proposes an automatic control siphon drainage method for tunnel construction with reverse slope. This method ensures that the drainage pipes are always full of water during reverse slope drainage. Two water level sensors automatically control the opening and closing of various gate valves and the water pumps, forming an automatic control siphon drainage system. This solves the siphon drainage problem, addresses the issue of high-power pumping, avoids siphon effect losses, and saves significant drainage costs.

[0004] This invention is implemented as follows: an automatic control siphon drainage method for reverse slope tunnel construction, characterized by: a gate valve equipped with remote automatic control switches A, B, and C, the size of which is adapted to the drainage pipe; water level sensors installed at the overflow outlet of the B connecting pipe and 10cm below the top of the clear water pool, wherein water level sensor N is installed at B, water level sensor M is installed at the clear water pool, water pump I is installed at the working face, water pump II is installed at the drainage pipe outlet in the clear water pool, and the rest are drainage pipes; wherein the elevation of the drainage outlet outside the tunnel is 30m lower than the bottom of the clear water pool inside the tunnel;

[0005] The described tunnel construction reverse slope automatic control siphon drainage method innovatively installs remotely controllable water pumps at the tunnel's external drainage pipe inlet and pump accessories, innovatively installs a connecting pipe at the highest point of the drainage pipe, and innovatively installs automatic water level sensors at the clear water tank and connecting pipe. The system innovatively integrates water level sensing with the opening and closing of gate valves and water pumps through automatic system control, ensuring that the drainage pipe is always full of water. When gate valves A and C open and gate valve B closes, siphon drainage is automatically formed. The overall setup and system control logic are simple and convenient, automatically solving the siphon drainage problem, avoiding siphon effect losses, and saving a significant amount of electricity for drainage.

[0006] This invention fully utilizes the siphon effect to reduce electricity costs for drainage pumping. It employs an automatic control siphon drainage method for tunnel construction on a reverse slope. Two temporary water storage tanks are set up behind the secondary lining trolley during reverse slope tunnel construction: one for sewage and one for clean water. Water pumped from the tunnel face and lower steps enters the sewage tank, settles, and then naturally flows into the clean water tank. A centralized automatic control siphon drainage system is installed between the clean water tank and the outside of the tunnel. A steel drainage pipe is installed from the clean water tank to the outside of the tunnel. The elevation of the steel drainage pipe outlet outside the tunnel is 30m lower than the bottom of the clean water tank inside the reverse slope tunnel. A remotely controlled automatic gate valve is installed at the pipe outlet outside the tunnel. At the point where the drainage pipe changes slope (highest point), a vertical connecting pipe is installed, 2m high, with a water level sensor and a gate valve with a remote automatic control switch at the pipe outlet. An automatic gate valve and a remotely controlled water pump are installed at the end of the water pipe in the clean water tank. During construction, water used for working at the tunnel face and lower steps is pumped into a wastewater storage tank. After sedimentation, it naturally flows into a clear water tank. When the water level in the clear water tank reaches a certain height, a water level sensor sends a signal, triggering a remotely controlled automatic water pump to start operating. Simultaneously, the system automatically closes the gate valve at the lowest point of the external drainage pipe, opens the automatic gate valve at the water pump, and automatically opens and closes the gate valve on the connecting pipe at the highest point of the drainage pipe. When water overflows the entire pipe and spills from the connecting pipe at the highest point, triggering the water level sensor, the gate valve at the highest point automatically closes, while the remotely controlled gate valve at the lowest point outside the tunnel automatically opens and the water pump shuts down, forming an automatic siphon drainage system. The entire process is controlled by water level sensors installed in the clear water tank and the connecting pipe at the highest point of the pipeline, which control the opening and closing of the water pump and the three gate valves, forming an automatic siphon drainage system. By creatively installing remotely controllable water pumps at the drainage pipe outlets and pump accessories outside the tunnel, creatively installing connecting pipes at the highest point of the drainage pipes, and creatively installing automatic water level sensors at the clear water tank and connecting pipes, the system creatively integrates water level sensing with the opening and closing of gate valves and water pumps through automatic control, ensuring that the drainage pipes are always full of water. When gate valves A and C are opened and gate valve B is closed, a siphon pumping system is automatically formed to drain the water.

[0007] The automatic control siphon drainage method for reverse slope in tunnel construction according to the present invention is implemented as follows:

[0008] Step 1: Pump I pumps sewage into the sewage tank for natural sedimentation, and the clear water flows into the clear water tank after sedimentation.

[0009] Step 2: When the water level sensor M detects that the water is full, it opens gate valves C and B, closes gate valve A, and starts water pump II. All of the above actions are completed simultaneously by the automatic control system.

[0010] Step 3: Water fills the drain pipe. When the water level sensor N senses that the water is about to overflow the connecting pipe, the system automatically controls the closure of gate valve B and the opening of gate valve A to shut down water pump II, thus forming an automatic siphon drainage channel for automatic drainage.

[0011] Step 4: When the water level sensor M detects that the water depth is below 50cm, the system automatically controls the closure of gate valves A and C, the opening of gate valve B, and the shutdown of water pump II.

[0012] Step 5: After sedimentation, the wastewater continuously flows into the clear water tank. When the water level sensor M detects that the tank is full, gate valves C and B open, gate valve A closes, and water pump II starts. All these actions are simultaneously completed by the automatic control system. This process repeats, automatically controlling the pumping and drainage, ensuring the water pipes are always full and maintaining the siphon effect. This forms an automatically controlled siphon pumping and drainage method, saving significant amounts of electricity for pumping, resulting in substantial economic benefits.

[0013] This invention discloses an automatic control siphon drainage method for tunnel construction on a reverse slope. Two temporary water storage tanks are set up behind the secondary lining trolley in the reverse slope tunnel construction, one for sewage and one for clean water. Water pumped from the working face and lower steps enters the sewage tank, settles, and then naturally flows into the clean water tank. A centralized automatic control siphon drainage system is set up between the clean water tank and the outside of the tunnel. A steel drainage pipe is installed from the clean water tank to the outside of the tunnel. The elevation of the steel drainage pipe outlet outside the tunnel is 30m lower than the bottom of the clean water tank inside the reverse slope tunnel. A remotely controlled automatic gate valve is installed at the pipe outlet outside the tunnel. At the point where the slope changes between the drainage pipes inside and outside the tunnel (the highest point), a vertical connecting pipe is installed, 2m high, with a water level sensor and a gate valve with a remote automatic control switch at the pipe outlet. An automatic gate valve and a remotely controlled water pump are installed at the end of the water pipe in the clean water tank. During construction, water used for working at the tunnel face and lower steps is pumped into a wastewater storage tank. After sedimentation, it naturally flows into a clear water tank. When the water level in the clear water tank reaches a certain height, a water level sensor sends a signal, triggering a remotely controlled automatic water pump to start operating. Simultaneously, the system automatically closes the gate valve at the lowest point of the external drainage pipe, opens the automatic gate valve at the water pump, and automatically opens and closes the gate valve on the connecting pipe at the highest point of the drainage pipe. When water overflows the entire pipe and spills from the connecting pipe at the highest point, triggering the water level sensor, the gate valve at the highest point automatically closes, while the remotely controlled gate valve at the lowest point outside the tunnel automatically opens and the water pump shuts down, forming an automatic siphon drainage system. The entire process is controlled by water level sensors installed in the clear water tank and the connecting pipe at the highest point of the pipeline, which control the opening and closing of the water pump and the three gate valves, forming an automatic siphon drainage system.

[0014] In tunnel construction on a reverse slope (where the elevation decreases as you excavate deeper), the tunnel forms a natural drainage channel after excavation. Bedrock fissure water, groundwater, and pressurized groundwater migrate to lower elevations (the tunnel face), causing water accumulation and creating numerous difficulties for construction. During construction, it is necessary to pump water from the area near the tunnel face, typically using submersible pumps to remove the accumulated water. To ensure no water accumulation, tunnel construction drainage needs to be carried out continuously for 24 hours, consuming a significant amount of electricity. Therefore, the method disclosed in this invention employs centralized automatic siphon drainage, fully utilizing automated information linkage control of pumps and valves. By utilizing the siphon drainage principle, the electricity consumption for drainage during tunnel reverse slope construction can be reduced at the source, significantly lowering the electricity cost for drainage.

[0015] This invention has the following advantages: the automatic control siphon drainage method for reverse slope in tunnel construction, in which each gate valve plays a role in stopping water, preventing backflow, and sealing the pipeline to form a siphon, and the whole process is realized by water level monitoring and linkage control, so as to truly achieve the siphon effect without loss, pump water as needed, and reduce the cost of construction drainage. Attached Figure Description

[0016] Figure 1 This is the overall layout diagram of the automatic siphon drainage system with reverse slope control;

[0017] Figure 2 This is a layout diagram of the facilities at the sewage pool and clear water pool inside the cave;

[0018] Figure 3 Layout diagram of drainage pipelines and gate valves outside the tunnel.

[0019] Among them: sewage pump I, clean water pump II, sewage tank, clean water tank, drainage ditch, gate valve (A), gate valve (B), gate valve (C), water level sensor (M), water level sensor (N), and drainage pipe. Detailed Implementation

[0020] The following will be combined with the appendix Figures 1-3 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] This invention provides an improved method for reverse-slope siphon drainage in tunnel construction. It includes gate valves with remote automatic control switches A, B, and C, the size of which is adapted to the drainage pipe. Water level sensors are installed at the overflow outlet of the B connecting pipe and 10cm below the top of the clear water pool. Specifically, water level sensor N is installed at B, water level sensor M is installed at the clear water pool, water pump I is installed at the working face, and water pump II is installed at the drainage pipe outlet in the clear water pool. The remaining sections are drainage pipes. The elevation of the drainage outlet outside the tunnel is 30m lower than the bottom of the clear water pool inside the tunnel. Pump I pumps sewage into a sewage tank for natural sedimentation, and the settled water flows into a clear water tank. When the water level sensor M detects that the tank is full, it opens gate valves C and B, closes gate valve A, and starts pump II. All of these actions are completed simultaneously by the automatic control system. When the drain pipe is full, the water level sensor N detects that the water is about to overflow the connecting pipe. The system automatically controls the closure of gate valve B, the opening of gate valve A, and the shutdown of pump II, thus forming an automatic siphon drainage channel for automatic drainage. When the water level sensor M detects that the water depth is below 50cm, the system automatically controls the closure of gate valves A and C, the opening of gate valve B, and the shutdown of pump II.

[0022] After sedimentation, the wastewater continuously flows into the clear water tank. When the water level sensor M detects that the tank is full, gate valves C and B are opened, gate valve A is closed, and water pump II is started. All of the above actions are completed simultaneously by the automatic control system. The above steps are repeated to automatically control the pumping and drainage, ensuring that the water pipe is always full and maintaining the siphon effect.

[0023] The implementation steps of this invention are as follows:

[0024] Step 1: Pump I pumps sewage into the sewage tank for natural sedimentation, and the clear water flows into the clear water tank after sedimentation.

[0025] Step 2: When the water level sensor M detects that the water is full, it opens gate valves C and B, closes gate valve A, and starts water pump II. All of the above actions are completed simultaneously by the automatic control system.

[0026] Step 3: Water fills the drain pipe. When the water level sensor N senses that the water is about to overflow the connecting pipe, the system automatically controls the closure of gate valve B and the opening of gate valve A to shut down water pump II, thus forming an automatic siphon drainage channel for automatic drainage.

[0027] Step 4: When the water level sensor M detects that the water depth is below 50cm, the system automatically controls the closure of gate valves A and C, the opening of gate valve B, and the shutdown of water pump II.

[0028] Step 5: After sedimentation in the sewage tank, the water continuously flows into the clear water tank. When the water level sensor M detects that the tank is full, gate valves C and B open, gate valve A closes, and water pump II starts. All these actions are simultaneously completed by the automatic control system. This process repeats, automatically controlling the pumping and drainage, ensuring the water pipes are always full and maintaining the siphon effect. This forms an automatically controlled siphon pumping and drainage method, saving significant amounts of electricity for pumping, resulting in substantial economic benefits.

[0029] The tunnel construction reverse slope siphon drainage method innovatively incorporates remotely controlled automatic water pumps at the tunnel's external drainage pipe inlet and pump accessories, a connecting pipe at the highest point of the drainage pipe, and automatic water level sensors at the clear water tank and connecting pipe. This innovative system automatically controls the water level sensing, gate valve opening / closing, and pump operation, ensuring the drainage pipe is always full and automatically forming a siphon drainage system. Two temporary water storage tanks are set up behind the secondary lining trolley in the reverse slope tunnel construction, one for sewage and one for clean water. Water pumped from the working face and lower steps enters the sewage tank, settles, and then naturally flows into the clear water tank. A centralized automatic control siphon drainage system is installed between the clear water tank and the outside of the tunnel. A steel drainage pipe is installed from the clear water tank to the outside of the tunnel, with the elevation of the steel drainage pipe outlet 30m lower than the bottom of the clear water tank inside the reverse slope tunnel. A remotely controlled automatic gate valve is installed at the outlet of the pipe outside the tunnel. A vertical connecting pipe, 2m high, is installed at the highest point where the drainage pipes inside and outside the tunnel change slope. A water level sensor and a gate valve with a remote automatic control switch are installed at the pipe opening. An automatic gate valve and a remotely controlled water pump are installed at the end of the water pipe in the clear water tank. During construction, construction water from the working face and lower steps is pumped to a wastewater storage tank. After sedimentation, it flows naturally into the clear water tank. When the water level in the clear water tank reaches a certain height, the water level sensor sends a signal, triggering the remotely controlled water pump to start operating. Simultaneously, the gate valve at the lowest point of the drainage pipe outside the tunnel is automatically closed, and the automatic gate valve at the water pump and the automatic gate valve on the connecting pipe at the highest point of the drainage pipe are automatically opened. When water overflows the entire pipe and spills from the connecting pipe at the highest point, triggering the water level sensor, the gate valve at the highest point is automatically closed, the remotely controlled gate valve at the lowest point outside the tunnel is automatically opened, and the water pump is shut down, forming an automatic siphon drainage system. The entire process uses water level sensors installed in the clear water tank and the connecting pipe at the highest point of the pipeline to control the opening and closing of the water pump and three gate valves, forming an automatic siphon drainage system. By creatively installing remotely controllable water pumps at the drainage pipe outlet outside the tunnel and near the pump, creatively installing a connecting pipe at the highest point of the drainage pipe, and creatively installing automatic water level sensors in the clear water tank and at the connecting pipe, the system creatively integrates water level sensing with the automatic control of gate valve opening and closing, and water pump operation. This ensures that the drainage pipe is always full of water, and when gate valves A and C open and gate valve B closes, automatic siphon drainage is initiated.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for automatically controlling siphon pumping and drainage on reverse slope during tunnel construction, characterized in that: The system includes a sewage tank and a clear water tank inside the tunnel. The elevation of the drainage outlet outside the tunnel is 30m lower than the bottom of the clear water tank inside the tunnel. Pump I is installed at the working face, and pump II is installed at the drainage pipe outlet in the clear water tank. The rest are drainage pipes. A vertical connecting pipe is installed at the highest point of the drainage pipe. Pumps I and II are pumps that can be remotely and automatically controlled. A gate valve C with a remote automatic control switch is installed at the end of the water pipe in the clear water tank. A gate valve B with a remote automatic control switch is installed at the pipe outlet of the vertical connecting pipe. A gate valve A with a remote automatic control switch is installed at the pipe outlet outside the tunnel. The size of the gate valves is adapted to the drainage pipe. An automatic water level sensor N is installed at the pipe outlet of the vertical connecting pipe. A water level sensor M is installed 10cm below the top of the clear water tank. The water level sensing, gate valve opening and closing, and pump opening and closing are automatically controlled by the system to ensure that the drainage pipe is always full of water. When gate valves A and C are opened and gate valve B is closed, a siphon is automatically formed to drain the water. The implementation and execution steps are as follows: Step 1: Pump I pumps the sewage from the working face and the lower step into the sewage tank for natural sedimentation. After sedimentation, the clear water flows into the clear water tank. Step 2: When the water level sensor M detects that the water is full, it opens gate valves C and B, closes gate valve A, and starts water pump II. All of the above actions are completed simultaneously by the automatic control system. Step 3: Water fills the drain pipe. When the water level sensor N senses that the water is about to overflow the connecting pipe, the system automatically controls the closure of gate valve B and the opening of gate valve A to shut down water pump II, thus forming an automatic siphon drainage channel for automatic drainage. Step 4: When the water level sensor M detects that the water depth is below 50cm, the system automatically controls the closure of gate valves A and C, the opening of gate valve B, and the shutdown of water pump II. Step 5: After the sewage tank settles, the water continues to flow into the clear water tank. When the water level sensor M detects that the tank is full, gate valves C and B are opened, gate valve A is closed, and water pump II is started. All of the above actions are completed simultaneously by the automatic control system. Repeat the above steps to automatically control the pumping and drainage, ensuring that the water pipe is always full and maintaining the siphon effect.

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