Tunnel boring machine construction reverse slope tunnel continuous drainage system

Abstract

The invention relates to the field of tunnel boring machine construction, and discloses a tunnel boring machine construction reverse slope tunnel continuous drainage system which comprises a mountain body serving as a basic component of an overall system and used for constructing and deploying all matched use parts and components thereof; comprising a right hole and a left hole, the right hole and the left hole are both arranged in a mountain, and the construction method of the reverse slope tunnel continuous drainage system constructed through the tunnel boring machine comprises the following steps that S1, preliminary preparation is conducted, specifically, scattered slurry pumps and temporary pump stations are arranged in a tunnel boring machine area, and cascade pump stations are arranged in a tunnel; and S2, a drainage system is arranged. By adopting the design of the double-path drainage system, the continuity of the drainage process and the high efficiency of the system are realized by alternately using the temporary water sump, the main drainage pipeline and the auxiliary drainage pipeline and a synchronous water sump cleaning technology, and in addition, the emergency drainage capacity of the drainage system is greatly improved in the arrangement mode that left and right hole drainage equipment and the water sump are shared; and the construction safety and progress are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of tunnel boring machine construction, in particular to a continuous drainage system for a reverse slope tunnel constructed by a tunnel boring machine. Background Art

[0002] Tunnel boring machines are increasingly used in the construction of long and large tunnels due to their safety, speed, efficiency and environmental protection. According to the tunnel design, some tunnel boring machines are used for reverse slope excavation. At this time, the accumulated water in the tunnel is pumped out of the tunnel through a multi-stage pumping station. Reverse slope drainage is the key to the smooth implementation of the project. Especially for water-rich reverse slope excavation tunnels, if the water on the face cannot be discharged in time, a machine flooding accident will occur, causing heavy losses. During the excavation of the tunnel boring machine, a large amount of stone powder will be generated and mixed in the accumulated water. During the process of pumping and draining the accumulated water, a large amount of stone powder will be pumped and drained step by step with the accumulated water to the water tanks along the way and precipitated, which will cause the water tanks to be buried, the water pumps to be buried, the pumping and drainage capacity of the pumping station to be reduced or even fail, causing the collapse of the entire pumping and drainage system. The traditional practice is to suspend pumping and drainage, use manual cleaning, and then resume pumping and drainage. This method will cause water on the face and affect on-site construction. Therefore, in the process of reverse slope water-rich tunnel excavation, how to achieve continuous pumping and drainage of the face and the normal operation of pumping and drainage pumping stations at all levels is a top priority.

[0003] Due to the tight project schedule, tunnel boring machines currently mostly use construction technologies such as synchronous lining to dig tunnels. These construction processes interfere with the normal operation of the drainage pipes in the tunnel and also cause drainage interruptions. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a continuous drainage system for a reverse slope tunnel constructed by a tunnel boring machine, which solves the problem of timely drainage of accumulated water and stone powder during tunnel excavation.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a continuous drainage system for reverse slope tunnels constructed by a tunnel boring machine, comprising:

[0006] The mountain, as the basic component of the whole system, is used for the construction and deployment of various supporting parts and their components;

[0007] It includes a right tunnel and a left tunnel, both of which are arranged inside the mountain, and are connected by a transverse passage, in which a cascade pump station is arranged;

[0008] The drainage part of the tunnel boring machine is set up in the tunnel boring machine section to pump out the accumulated water and stone powder generated during the tunnel excavation process to the temporary water tank at the rear, reduce the amount of slag removal work at the invert arch, and ensure the normal operation of the drainage system;

[0009] It comprises two tunnel boring machines, which are respectively arranged in front of the excavation of the right tunnel and the left tunnel, and the bottom of the back arch behind the shields of the two tunnel boring machines are arranged with a No. 1 tunnel bottom slurry pump and a No. 2 tunnel bottom slurry pump, and the rear supporting trolley is connected to the rear of the tunnel boring machine main beam, and the rear supporting trolley is provided with a No. 1 temporary water tank and a No. 2 temporary water tank, and the No. 1 temporary water tank and the No. 2 temporary water tank are both provided with clean sewage pumps, and the No. 1 temporary water tank and the No. 2 temporary water tank are respectively provided with a No. 1 water pump and a No. 2 water pump, The No. 1 water pump and the No. 2 water pump are connected to the No. 1 flexible hose and the No. 2 flexible hose respectively, and the No. 1 flexible hose and the No. 2 flexible hose are connected to the No. 1 main drainage pipe and the No. 2 main drainage pipe respectively. Extension pipe sections are connected between the No. 1 flexible hose and the No. 1 main drainage pipe and between the No. 2 flexible hose and the No. 2 main drainage pipe. The No. 1 connecting platform and the No. 2 connecting platform are respectively arranged at the positions where the two extension pipe sections are connected to the No. 1 main drainage pipe and the No. 2 main drainage pipe. The No. 1 connecting platform and the No. 2 connecting platform are both arranged on the rear matching trolley;

[0010] The rear tunnel part is set inside the right tunnel and the left tunnel, and is used to pump out the water from the heading area to the sewage treatment station at the tunnel entrance step by step through the cascade pumping station during the tunnel excavation process;

[0011] Multiple cascade pumping stations are set in the horizontal passage between the right tunnel and the left tunnel. They serve as the main relay stations for pumping out accumulated water. They pump out the accumulated water step by step to the sewage treatment station at the tunnel entrance through relay pumping.

[0012] Preferably, the No. 1 main drainage pipe and the No. 2 main drainage pipe are connected to the cascade pump station.

[0013] Preferably, the rear tunnel part includes multiple groups of sump water pump No. 1 and sump water pump No. 2, each group of the sump water pump No. 1 and sump water pump No. 2 are respectively arranged inside multiple cascade pumping stations, each group of the sump water pump No. 1 and sump water pump No. 2 are respectively connected to the No. 1 relay main drainage pipe and the No. 2 relay main drainage pipe, the other ends of the No. 1 relay main drainage pipe and the No. 2 relay main drainage pipe are connected to the next-level cascade pumping station, and sump clean and sewage pumps are arranged on both sides of the interior of each of the cascade pumping stations.

[0014] Preferably, the other ends of the last group of No. 1 relay main drainage pipes and No. 2 relay main drainage pipes are connected to the tunnel entrance sewage treatment station, and slag discharge belts are provided inside the right tunnel and the left tunnel, and synchronous lining trolleys are provided inside the right tunnel and the left tunnel.

[0015] The construction method of the continuous drainage system of the reverse slope tunnel constructed by a tunnel boring machine comprises the following steps:

[0016] S1. Preliminary preparation: Arrange scattered slurry pumps and temporary pumping stations in the tunnel boring machine area, and arrange cascade pumping stations in the tunnel;

[0017] S2. Drainage system layout: install the drainage system and related equipment of the left and right tunnels;

[0018] S3, drainage system operation: start the slurry pump and water pumps at all levels of water tanks, pump the water on the tunnel heading area to the temporary water tanks and cascade pumping stations at all levels step by step, and finally discharge it;

[0019] S4. Pipeline extension and cleaning: As the tunnel continues to advance, the drainage pipeline is extended and the sediment in the water tank is cleaned in time;

[0020] S5. Emergency measures: The drainage pipes and water tanks arranged in the left tunnel and the right tunnel are shared by the left and right tunnels, and serve as backup drainage systems for adjacent tunnels.

[0021] Preferably, the step S1 specifically includes the following steps:

[0022] S1.1. Arrange scattered slurry pumps at the bottom of the invert behind the TBM shield to pump the accumulated water in the tunnel to the temporary water tank equipped behind the TBM;

[0023] S1.2. Arrange a cascade pump station in the horizontal passage to relay and pump water from the heading area to the outside of the tunnel.

[0024] Preferably, the step S2 specifically includes the following steps:

[0025] S2.1. Arrange the drainage system of the right tunnel and the left tunnel, and connect the drainage systems between the two tunnels into a whole through a cascade pump station;

[0026] S2.2, install No. 1 main drain pipe and No. 2 main drain pipe, and configure No. 1 water pump and No. 2 water pump in the temporary water tank, and connect No. 1 main drain pipe and No. 2 main drain pipe respectively through No. 1 flexible hose and No. 2 flexible hose;

[0027] S2.3. The sump pump No. 1 and sump pump No. 2 are arranged in the cascade pump station and are connected to the No. 1 relay main drainage pipe and the No. 2 relay main drainage pipe respectively.

[0028] Preferably, the step S3 specifically includes the following steps:

[0029] S3.1. Start the No. 1 tunnel bottom slurry pump and the No. 2 tunnel bottom slurry pump to pump the accumulated water to the No. 1 temporary water tank and the No. 2 temporary water tank;

[0030] S3.2, use the No. 1 and No. 2 water pumps in the temporary water tank to transport the accumulated water to the nearest cascade pumping station through the No. 1 main drainage pipe and the No. 2 main drainage pipe;

[0031] S3.3. The No. 1 water pump and the No. 2 water pump in the cascade pump station will relay to pump out the accumulated water, and then pump the accumulated water step by step to the cave entrance sewage treatment station through the No. 1 relay main drainage pipe and the No. 2 relay main drainage pipe.

[0032] Preferably, the step S4 specifically includes the following steps:

[0033] The S4 step specifically includes the following steps:

[0034] S4.1. The No. 1 flexible hose and the No. 2 flexible hose are folded and arranged. When the tunnel boring machine moves forward, the No. 1 flexible hose and the No. 2 flexible hose are pulled apart as the tunnel boring machine moves forward, gradually extending the drainage pipeline;

[0035] S4.2. When the No. 1 main drain pipe needs to be extended, the drainage of the No. 1 drain pipe is suspended, and the No. 2 drain pipe is activated for drainage. The No. 1 flexible hose is disconnected from the No. 1 main drain pipe, and the No. 1 flexible hose is retracted and folded up. An extension pipe section is added at the disconnection point between the No. 1 flexible hose and the No. 1 main drain pipe, and connected between the No. 1 flexible hose and the No. 1 main drain pipe. The No. 2 main drain pipe is extended in the same way as the No. 1 main drain pipe;

[0036] S4.3. When the No.1 main drainage pipe is being extended, the No.1 temporary water tank is cleaned simultaneously. The accumulated slag in the water tank is flushed out with high-pressure water and then pumped out through a clean sewage pump onto the slag discharge belt and transported out of the tunnel. The cleaning method of the No.2 temporary water tank is the same as that of the No.1 temporary water tank.

[0037] Preferably, the step S5 specifically includes the following steps:

[0038] S5.1. The water tank and water pump in the cascade pump station are shared by the left and right tunnels and serve as the backup drainage system for the other tunnel;

[0039] S5.2. Start the backup drainage systems of the left and right tunnels simultaneously as needed to significantly increase the emergency drainage capacity and ensure the safety and smooth progress of tunnel construction.

[0040] The present invention provides a continuous drainage system for reverse slope tunnels constructed by a tunnel boring machine. It has the following beneficial effects:

[0041] 1. The present invention can realize continuous pumping and drainage of accumulated water during tunnel excavation by arranging scattered slurry pumps, temporary water tanks and cascade pumping stations, effectively preventing accumulated water from accumulating in the tunnel and ensuring the normal operation of the tunnel boring machine.

[0042] 2. The present invention adopts a dual-path drainage system design, which ensures that the drainage system does not interrupt drainage during extension and maintenance by alternately using two sets of main drainage pipelines and temporary water tanks, thereby improving drainage efficiency and system reliability.

[0043] 3. In the process of tunnel excavation, the present invention uses a scattered slurry pump to pump the accumulated water containing a large amount of stone powder into a temporary water tank. After preliminary sedimentation, the slurry pump is used to pump the stone powder to the slag conveyor and output it to the outside of the tunnel, thereby reducing the cleaning workload of subsequent cascade pumping stations and water tanks and avoiding blockage of pumping stations and drainage pipes.

[0044] 4. The left and right tunnels of the present invention share the cascade pump station and water tank in the transverse passage, which serve as backup drainage systems for each other. In emergency situations, the backup drainage systems are started simultaneously, which greatly improves the emergency drainage capacity and ensures the safety of tunnel construction.

[0045] 5. In the process of tunnel excavation, the drainage pipeline of the present invention is extended synchronously with the advancement of the tunnel boring machine, and the water tank can be cleaned when the drainage pipeline is extended, thereby ensuring the continuity of the drainage process and the high efficiency of the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a schematic diagram of the system of the present invention;

[0047] Figure 2 It is a partial schematic diagram of the system of the present invention;

[0048] Figure 3 It is a schematic diagram of the cave sewage treatment station of the present invention.

[0049] Among them, 100, right tunnel; 1011, mountain; 1012, tunnel boring machine; 1021, No. 1 tunnel bottom slurry pump; 1022, No. 2 tunnel bottom slurry pump; 103, rear supporting trolley; 1041, No. 1 temporary water tank; 1042, No. 2 temporary water tank; 1051, No. 1 water pump; 1052, No. 2 water pump; 1061, No. 1 flexible hose; 1062, No. 2 flexible hose; 1071, No. 1 main drainage pipe; 1072, No. 2 main drainage pipe; 108. Extension pipe section; 1091. No. 1 takeover platform; 1092. No. 2 takeover platform; 110. Clean sewage pump; 111. Cross passage | cascade pump station; 1121. No. 1 water pump for water tank; 1122. No. 2 water pump for water tank; 113. Clean sewage pump for water tank; 1141. No. 1 relay main drainage pipe; 1142. No. 2 relay main drainage pipe; 115. Tunnel entrance sewage treatment station; 116. Slag discharge belt; 117. Synchronous lining trolley; 200. Left tunnel. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Example:

[0052] Please see attached Figure 1 -Attached Figure 2 The embodiment of the present invention provides a continuous drainage system for a reverse slope tunnel constructed by a tunnel boring machine, comprising:

[0053] The mountain 1011, as the basic component of the whole system, is used for the construction and deployment of various supporting parts and their components;

[0054] It includes a right tunnel 100 and a left tunnel 200, both of which are arranged inside a mountain 1011, and are connected by a transverse passage, in which a cascade pump station 111 is arranged;

[0055] The drainage part of the tunnel boring machine is set up in the tunnel boring machine section to pump out the accumulated water and stone powder generated during the tunnel excavation process to the temporary water tank at the rear, reduce the amount of slag removal work at the invert arch, and ensure the normal operation of the drainage system;

[0056] The invention comprises two tunnel boring machines 1012, which are respectively arranged in front of the excavation of the right tunnel 100 and the left tunnel 200. A No. 1 tunnel bottom slurry pump 1021 and a No. 2 tunnel bottom slurry pump 1022 are arranged at the bottom of the back arch behind the shields of the two tunnel boring machines 1012. A rear supporting trolley 103 is connected to the rear of the main beam of the tunnel boring machine 1012. A No. 1 temporary water tank 1041 and a No. 2 temporary water tank 1042 are arranged on the rear supporting trolley 103. A clean sewage pump 110 is arranged in the No. 1 temporary water tank 1041 and the No. 2 temporary water tank 1042. A No. 1 water pump 1051 and a No. 2 water pump 1052 are respectively arranged inside the No. 1 temporary water tank 1041 and the No. 2 temporary water tank 1042. The No. 1 flexible hose 1061 and the No. 2 flexible hose 1062 are connected to the No. 1 main drain pipe 1071 and the No. 2 main drain pipe 1072 respectively, and the No. 1 flexible hose 1061 and the No. 2 flexible hose 1062 are connected to the No. 1 main drain pipe 1071 and the No. 2 main drain pipe 1072 respectively. An extension pipe section 108 is connected between the No. 1 flexible hose 1061 and the No. 1 main drain pipe 1071 and between the No. 2 flexible hose 1062 and the No. 2 main drain pipe 1072. The positions where the two extension pipe sections 108 are connected to the No. 1 main drain pipe 1071 and the No. 2 main drain pipe 1072 are respectively provided with a No. 1 connecting platform 1091 and a No. 2 connecting platform 1092, and the No. 1 connecting platform 1091 and the No. 2 connecting platform 1092 are both arranged on the rear matching trolley 103;

[0057] The rear tunnel part is arranged inside the right tunnel 100 and the left tunnel 200, and is used to pump out the water from the heading area step by step through the cascade pumping station 111 to the tunnel entrance sewage treatment station 115 during the tunnel excavation process;

[0058] A plurality of cascade pumping stations 111 are arranged in the transverse passage between the right tunnel 100 and the left tunnel 200. They serve as the main relay stations for pumping out the accumulated water, and pump out the accumulated water step by step to the tunnel entrance sewage treatment station 115 through a relay pumping method.

[0059] Specifically, the system sets up tunnel boring machines 1012 in the right tunnel 100 and the left tunnel 200, respectively. The bottom of the shield back arch of each tunnel boring machine 1012 is arranged with a No. 1 tunnel bottom slurry pump 1021 and a No. 2 tunnel bottom slurry pump 1022. These slurry pumps are responsible for pumping the accumulated water and stone powder generated during the tunnel excavation process to the No. 1 temporary water tank 1041 and the No. 2 temporary water tank 1042 on the rear matching trolley 103. The No. 1 water pump 1051 and the No. 2 water pump 1052 set in the temporary water tank transport the accumulated water to the nearest cascade pump station 111 through the connected No. 1 main drainage pipe 1071 and the No. 2 main drainage pipe 1072.

[0060] During the tunnel excavation process, multiple cascade pumping stations 111 are arranged between the right tunnel 100 and the left tunnel 200 as the main relay stations for pumping out the accumulated water. Each cascade pumping station 111 is equipped with a water tank and a corresponding water pump. The water pumps pump out the accumulated water from the inside of the tunnel to the tunnel entrance sewage treatment station 115 step by step through the relay pumping method. This step-by-step pumping method ensures the continuity and efficiency of drainage and avoids the drainage interruption problem in traditional methods.

[0061] The system is designed with a dual-channel drainage system, in which a flexible hose is used to connect the tunnel boring machine pipeline and the rear tunnel pipeline, so that the drainage pipeline can be extended synchronously when the tunnel boring machine 1012 moves forward. The drainage pipeline in the tunnel is used in one way and in the other way, and the two drainage pipelines are extended by alternately connecting the two drainage pipelines to achieve uninterrupted drainage in the tunnel. When the water supply of one drainage pipeline is stopped and the pipeline is extended, the corresponding temporary water tank is cleaned synchronously, and the accumulated slag in the water tank is flushed up with high-pressure water flow and then pumped out by sewage pump to the tunnel mucking belt and transported outside the tunnel. The slag at the bottom of the water tank of each cascade pump station 111 is pumped out by the configured bottom-type water tank cleaning sewage pump 113 to the tunnel mucking belt through the pipeline and transported outside the tunnel. During the extension of the drainage pipeline, the accumulated slag in the water tank is cleaned synchronously by alternating the two sets of main drainage pipelines and temporary water tanks, avoiding the blockage of the pump station and drainage pipeline caused by stone powder siltation.

[0062] Scattered slurry pumps are arranged at the bottom of the invert behind the shield of the tunnel boring machine 1012 to pump the accumulated water in the tunnel into the temporary water tank equipped behind the tunnel boring machine 1012. After preliminary sedimentation, the water is pumped into the water tank of the cross channel of the cascade pumping station 111 through the water pump in the temporary water tank, and then pumped step by step to the sewage treatment station at the entrance of the cave for centralized treatment and discharge after meeting the standards.

[0063] Through this system, the left and right tunnels share the water tank and water pump in the cascade pump station 111, which serve as the backup drainage system of the adjacent tunnels. In emergency situations, they are started synchronously, greatly improving the emergency drainage capacity. This design effectively improves the reliability and efficiency of the drainage system, ensures the timely discharge of accumulated water and stone powder during tunnel excavation, prevents the occurrence of machine flooding accidents, and ensures the safety and smooth progress of tunnel construction.

[0064] Please see attached Figure 3 The No. 1 main drainage pipe 1071 and the No. 2 main drainage pipe 1072 are connected to the cascade pump station 111.

[0065] The rear tunnel part includes multiple groups of water tank No. 1 water pump 1121 and water tank No. 2 water pump 1122, each group of water tank No. 1 water pump 1121 and water tank No. 2 water pump 1122 are respectively arranged inside multiple cascade pumping stations 111, each group of water tank No. 1 water pump 1121 and water tank No. 2 water pump 1122 are respectively connected to the No. 1 relay main drainage pipe 1141 and the No. 2 relay main drainage pipe 1142, the other ends of the No. 1 relay main drainage pipe 1141 and the No. 2 relay main drainage pipe 1142 are connected to the next-level cascade pumping station 111, and water tank clean and sewage pumps 113 are arranged on both sides of the interior of each cascade pumping station 111.

[0066] The other ends of the last set of No. 1 relay main drainage pipe 1141 and No. 2 relay main drainage pipe 1142 are connected to the tunnel entrance sewage treatment station 115, and slag conveyors 116 are provided inside the right tunnel 100 and the left tunnel 200, and synchronous lining trolleys 117 are provided inside the right tunnel 100 and the left tunnel 200.

[0067] Specifically, the continuous drainage system for reverse slope tunnels constructed by the tunnel boring machine 1012 of the present invention realizes efficient treatment of accumulated water and stone powder during tunnel excavation through the precisely designed drainage pipes and pump station layout. During tunnel excavation, the right tunnel 100 and the left tunnel 200 are used as the basic layout space of the system for the construction and deployment of various supporting parts and their components to form a complete drainage system. The tunnel boring machine part includes two tunnel boring machines 1012, which are respectively arranged in front of the internal excavation of the right tunnel 100 and the left tunnel 200. At the bottom of the invert behind the shield of each tunnel boring machine 1012, a No. 1 tunnel bottom slurry pump 1021 and a No. 2 tunnel bottom slurry pump 1022 are arranged, and these slurry pumps pump the accumulated water and stone powder to the No. 1 temporary water tank 1041 and the No. 2 temporary water tank 1042 on the rear supporting trolley 103.

[0068] The No. 1 water pump 1051 and No. 2 water pump 1052 installed in the temporary water tank are connected to the cascade pump station 111 in the transverse passage through the No. 1 main drainage pipe 1071 and No. 2 main drainage pipe 1072, ensuring that the accumulated water can be smoothly transported to the cascade pump station 111. Multiple cascade pump stations 111 are set between the right tunnel 100 and the left tunnel 200, serving as the main relay stations for pumping out the accumulated water. The accumulated water is pumped out step by step to the tunnel entrance sewage treatment station 115 through relay pumping, ensuring the continuous operation of the drainage system.

[0069] The rear tunnel section includes multiple groups of water tank No. 1 water pumps 1121 and water tank No. 2 water pumps 1122, each of which is set inside multiple cascade pumping stations 111. These water pumps are connected through the No. 1 relay main drainage pipe 1141 and the No. 2 relay main drainage pipe 1142, and connected to the next cascade pumping station 111. The other ends of the last group of No. 1 relay main drainage pipes 1141 and No. 2 relay main drainage pipes 1142 are connected to the cave entrance sewage treatment station 115 to ensure the final treatment and discharge of accumulated water.

[0070] In summary, the pumping and drainage systems are configured in two ways. The water flow direction of the first drainage system is: water at the bottom of the tunnel → No. 1 tunnel bottom slurry pump 1021 → No. 1 temporary water tank 1041 → No. 1 flexible hose 1061 → extension pipe section 108 → No. 1 main drainage pipe 1071 → cascade pump station 111 → No. 1 water pump 1121 in the water tank → No. 1 relay main drainage pipe 1141 → tunnel entrance sewage treatment station 115. The water flow direction of the second drainage system is: water at the bottom of the tunnel → No. 2 tunnel bottom slurry pump 1022 → No. 2 temporary water tank 1042 → No. 2 flexible hose 1062 → extension pipe section 108 → → No. 2 main drainage pipe 1072 → cascade pump station 111 → No. 2 water pump 1122 in the water tank → No. 2 relay main drainage pipe 1142 → tunnel entrance sewage treatment station 115.

[0071] The entire system achieves timely drainage of accumulated water and stone dust through scientific drainage pipe layout and efficient pump station operation, preventing tunnel flooding accidents. At the same time, through the design of the backup drainage system, it ensures efficient emergency drainage capabilities in emergency situations, improves the reliability and efficiency of the system, and ensures the safety and smooth progress of tunnel excavation construction.

[0072] The construction method of the continuous drainage system of the reverse slope tunnel constructed by a tunnel boring machine comprises the following steps:

[0073] S1. Preliminary preparation: Arrange scattered slurry pumps and temporary pumping stations in the area of ​​the tunnel boring machine 1012, and arrange cascade pumping stations 111 in the tunnel;

[0074] S2. Drainage system layout: install the drainage system and related equipment of the left and right tunnels;

[0075] S3, drainage system operation: start the slurry pump and water pumps at all levels of water tanks, pump the water on the tunnel heading area to the temporary water tanks and cascade pumping stations 111 at all levels step by step, and finally discharge it;

[0076] S4. Pipeline extension and cleaning: As the tunnel continues to advance, the drainage pipeline is extended and the sediment in the water tank is cleaned in time;

[0077] S5. Emergency measures: The drainage pipes and water tanks arranged in the left tunnel 200 and the right tunnel 100 are common to the left and right tunnels, and serve as the backup drainage systems of the adjacent tunnels.

[0078] The S1 step specifically includes the following steps:

[0079] S1.1. Arrange scattered slurry pumps at the bottom of the invert behind the shield of the tunnel boring machine 1012 to pump the accumulated water in the tunnel to the temporary water tank equipped behind the tunnel boring machine 1012;

[0080] S1.2. A cascade pump station 111 is arranged in the transverse passage to relay and pump water from the heading area to the outside of the tunnel.

[0081] The S2 step specifically includes the following steps:

[0082] S2.1. Arrange the drainage system of the right tunnel 100 and the left tunnel 200, and connect the drainage systems between the two tunnels into a whole through the cascade pump station 111;

[0083] S2.2, install the No. 1 main drainage pipe 1071 and the No. 2 main drainage pipe 1072, and configure the corresponding No. 1 water pump 1051 and No. 2 water pump 1052 in the temporary water tank, and connect the No. 1 main drainage pipe 1071 and the No. 2 main drainage pipe 1072 through the No. 1 flexible hose 1061 and the No. 2 flexible hose 1062 respectively;

[0084] S2.3. A water tank No. 1 water pump 1121 and a water tank No. 2 water pump 1122 are arranged in the cascade pump station 111, and are connected to the No. 1 relay main drainage pipe 1141 and the No. 2 relay main drainage pipe 1142 respectively.

[0085] The S3 step specifically includes the following steps:

[0086] S3.1. Start the No. 1 tunnel bottom slurry pump 1021 and the No. 2 tunnel bottom slurry pump 1022 to pump the accumulated water to the No. 1 temporary water tank 1041 and the No. 2 temporary water tank 1042;

[0087] S3.2, use the No. 1 water pump 1051 and the No. 2 water pump 1052 in the temporary water tank to transport the accumulated water to the nearest cascade pump station 111 through the No. 1 main drainage pipe 1071 and the No. 2 main drainage pipe 1072;

[0088] S3.3, the water tank No. 1 pump 1121 and the water tank No. 2 pump 1122 in the cascade pump station 111 pump out the accumulated water in relay, and pump out the accumulated water step by step to the cave entrance sewage treatment station 115 through the No. 1 relay main drainage pipe 1141 and the No. 2 relay main drainage pipe 1142.

[0089] The S4 step specifically includes the following steps:

[0090] The S4 step specifically includes the following steps:

[0091] S4.1, the first flexible hose 1062 and the second flexible hose 1062 are folded and arranged, and when the tunnel boring machine 1012 excavates forward, the first flexible hose 1061 and the second flexible hose 1062 are pulled apart as the tunnel boring machine moves forward, and the drainage pipeline is gradually extended;

[0092] S4.2, when the No. 1 main drain pipe 1071 needs to be extended, the drainage of the No. 1 drain pipe is suspended, and the No. 2 drain pipe is activated for drainage, the No. 1 flexible hose 1061 is disconnected from the No. 1 main drain pipe 1071, the No. 1 flexible hose 1061 is retracted and folded up, and an extension pipe section 108 is added at the disconnection between the No. 1 flexible hose 1061 and the No. 1 main drain pipe 1071, and the No. 2 main drain pipe 1072 is extended in the same manner as the No. 1 main drain pipe 1071;

[0093] S4.3. During the extension operation of the No. 1 main drainage pipe 1071, the No. 1 temporary water tank 1041 is cleaned simultaneously. The accumulated slag in the water tank is flushed out with high-pressure water flow and then pumped out through the clean water pump 110 to the slag discharge belt 116 and transported to the outside of the tunnel. The cleaning method of the No. 2 temporary water tank 1042 is the same as that of the No. 1 temporary water tank 1041.

[0094] Step S5 specifically includes the following steps:

[0095] S5.1, the water tank and water pump in the cascade pump station 111 are shared by the left and right tunnels and also serve as the backup drainage system for the other tunnel;

[0096] S5.2. Start the backup drainage systems of the left and right tunnels simultaneously as needed to significantly increase the emergency drainage capacity and ensure the safety and smooth progress of tunnel construction.

[0097] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous drainage system for reverse slope tunnels constructed by a tunnel boring machine, characterized in that: include: The mountain (1011), as the basic component of the whole system, is used for the construction and deployment of various supporting parts and their components; It comprises a right tunnel (100) and a left tunnel (200), wherein the right tunnel (100) and the left tunnel (200) are both arranged inside a mountain (1011), and the right tunnel (100) and the left tunnel (200) are connected via a transverse passage, and a cascade pump station (111) is arranged in the transverse passage; The drainage part of the tunnel boring machine is set up in the tunnel boring machine section to pump out the accumulated water and stone powder generated during the tunnel excavation process to the temporary water tank at the rear, reduce the amount of slag removal work at the invert arch, and ensure the normal operation of the drainage system; The invention comprises two tunnel boring machines (1012), the two tunnel boring machines (1012) are respectively arranged at the front of the excavation of the right tunnel (100) and the left tunnel (200), the bottom of the back arch behind the shields of the two tunnel boring machines (1012) are both arranged with a first tunnel bottom slurry pump (1021) and a second tunnel bottom slurry pump (1022), the rear of the main beam of the tunnel boring machine (1012) is connected with a rear matching trolley (103), the rear The matching trolley (103) is provided with a first temporary water tank (1041) and a second temporary water tank (1042), and the first temporary water tank (1041) and the second temporary water tank (1042) are both provided with a clean sewage pump (110), and the first temporary water tank (1041) and the second temporary water tank (1042) are respectively provided with a first water pump (1051) and a second water pump (1052), and the first water pump (1051) and the second water pump (1052) are respectively provided with a first water pump (1051) and a second water pump (1052) in the interior of the first temporary water tank (1041) and the second temporary water tank (1042). A first water pump (1051) and a second water pump (1052) are respectively connected to a first flexible hose (1061) and a second flexible hose (1062), the first flexible hose (1061) and the second flexible hose (1062) are respectively connected to a first main drainage pipe (1071) and a second main drainage pipe (1072), an extension pipe section (108) is connected between the first flexible hose (1061) and the first main drainage pipe (1071) and between the second flexible hose (1062) and the second main drainage pipe (1072), a first connecting platform (1091) and a second connecting platform (1092) are respectively arranged at the positions where the two extension pipe sections (108) are connected to the first main drainage pipe (1071) and the second main drainage pipe (1072), and the first connecting platform (1091) and the second connecting platform (1092) are both arranged on a rear matching trolley (103); The rear tunnel part is arranged inside the right tunnel (100) and the left tunnel (200) and is used to pump out the water on the heading surface step by step through the cascade pumping station (111) to the tunnel entrance sewage treatment station (115) during the tunnel excavation process; A plurality of cascade pumping stations (111) are arranged in the transverse passage between the right tunnel (100) and the left tunnel (200). They serve as the main relay stations for pumping out the accumulated water, and pump out the accumulated water step by step to the tunnel entrance sewage treatment station (115) by relay pumping.

2. The continuous drainage system for reverse slope tunnel constructed by a tunnel boring machine according to claim 1, characterized in that: The No. 1 main drainage pipe (1071) and the No. 2 main drainage pipe (1072) are connected to the cascade pump station (111).

3. The continuous drainage system for reverse slope tunnel constructed by a tunnel boring machine according to claim 1, characterized in that: The rear tunnel part comprises a plurality of groups of water tank No. 1 water pumps (1121) and water tank No. 2 water pumps (1122), each group of the water tank No. 1 water pumps (1121) and water tank No. 2 water pumps (1122) are respectively arranged inside a plurality of cascade pumping stations (111), each group of the water tank No. 1 water pumps (1121) and water tank No. 2 water pumps (1122) are respectively connected to a No. 1 relay main drainage pipe (1141) and a No. 2 relay main drainage pipe (1142), the other ends of the No. 1 relay main drainage pipe (1141) and the No. 2 relay main drainage pipe (1142) are both connected inside the next cascade pumping station (111), and water tank clean and sewage pumps (113) are arranged on both sides inside each cascade pumping station (111).

4. The continuous drainage system for reverse slope tunnel constructed by a tunnel boring machine according to claim 3, characterized in that: The other ends of the last group of the first relay main drainage pipe (1141) and the second relay main drainage pipe (1142) are connected to the tunnel entrance sewage treatment station (115), the insides of the right tunnel (100) and the left tunnel (200) are both provided with a slag discharge belt (116), and the insides of the right tunnel (100) and the left tunnel (200) are both provided with a synchronous lining trolley (117).

5. A method for constructing a continuous drainage system for a reverse slope tunnel using a tunnel boring machine, characterized in that: The method for constructing a continuous drainage system for a reverse slope tunnel constructed by a tunnel boring machine as claimed in any one of claims 1 to 4 comprises the following steps: S1. Preliminary preparation: Arrange scattered slurry pumps and temporary pumping stations in the tunnel boring machine (1012) area, and arrange cascade pumping stations (111) in the tunnel; S2. Drainage system layout: install the drainage system and related equipment of the left and right tunnels; S3, drainage system operation: start the slurry pump and water pumps at various levels of water tanks, and pump the water on the tunnel heading area to the temporary water tanks and various levels of cascade pumping stations (111) step by step and finally discharge it; S4. Pipeline extension and cleaning: As the tunnel continues to advance, the drainage pipeline is extended and the sediment in the water tank is cleaned in time; S5. Emergency measures: The drainage pipes and water tanks arranged in the left tunnel (200) and the right tunnel (100) are shared by the left and right tunnels and serve as backup drainage systems for adjacent tunnels.

6. The construction method of the continuous drainage system of the reverse slope tunnel constructed by a tunnel boring machine according to claim 5, characterized in that: The S1 step specifically includes the following steps: S1.

1. Arrange scattered slurry pumps at the bottom of the invert behind the shield of the tunnel boring machine (1012) to pump the accumulated water in the tunnel into a temporary water tank equipped behind the tunnel boring machine (1012); S1.

2. A cascade pump station (111) is arranged in the transverse passage to pump water from the heading area to the outside of the tunnel.

7. The construction method of the continuous drainage system of the reverse slope tunnel constructed by a tunnel boring machine according to claim 5, characterized in that: The S2 step specifically includes the following steps: S2.

1. Arrange the drainage systems of the right tunnel (100) and the left tunnel (200), and connect the drainage systems between the two tunnels into a whole through the cascade pump station (111); S2.2, installing a No. 1 main drainage pipe (1071) and a No. 2 main drainage pipe (1072), and configuring a No. 1 water pump (1051) and a No. 2 water pump (1052) in the temporary water tank, and connecting the No. 1 main drainage pipe (1071) and the No. 2 main drainage pipe (1072) through a No. 1 flexible hose (1061) and a No. 2 flexible hose (1062), respectively; S2.3, a water tank No. 1 water pump (1121) and a water tank No. 2 water pump (1122) are arranged in the cascade pump station (111), and are connected to the No. 1 relay main drainage pipe (1141) and the No. 2 relay main drainage pipe (1142) respectively.

8. The construction method of the continuous drainage system of a reverse slope tunnel constructed by a tunnel boring machine according to claim 5, characterized in that: The S3 step specifically includes the following steps: S3.

1. Start the No. 1 tunnel bottom slurry pump (1021) and the No. 2 tunnel bottom slurry pump (1022) to pump the accumulated water to the No. 1 temporary water tank (1041) and the No. 2 temporary water tank (1042); S3.2, using the No. 1 water pump (1051) and the No. 2 water pump (1052) in the temporary water tank to transport the accumulated water to the nearest cascade pump station (111) through the No. 1 main drainage pipe (1071) and the No. 2 main drainage pipe (1072); S3.3, the No. 1 water pump (1121) and the No. 2 water pump (1122) in the cascade pump station (111) pump out the accumulated water in relay, and pump out the accumulated water step by step to the cave entrance sewage treatment station (115) through the No. 1 relay main drainage pipe (1141) and the No. 2 relay main drainage pipe (1142).

9. The construction method of the continuous drainage system of a reverse slope tunnel constructed by a tunnel boring machine according to claim 5, characterized in that: The S4 step specifically includes the following steps: S4.1, the first flexible hose (1061) and the second flexible hose (1062) are folded and arranged, and when the tunnel boring machine (1012) excavates forward, the first flexible hose (1061) and the second flexible hose (1062) are pulled apart as the tunnel boring machine moves forward, and the drainage pipeline is gradually extended; S4.2, when the No. 1 main drainage pipe (1071) needs to be extended, the drainage of the No. 1 drainage pipe is suspended, and the No. 2 drainage pipe is activated for drainage, the connection between the No. 1 flexible hose (1061) and the No. 1 main drainage pipe (1071) is disconnected, the No. 1 flexible hose (1061) is retracted and folded up, and an extension pipe section (108) is added at the disconnection between the No. 1 flexible hose (1061) and the No. 1 main drainage pipe (1071), and connected between the No. 1 flexible hose (1061) and the No. 1 main drainage pipe (1071), and the No. 2 main drainage pipe (1072) is extended in the same manner as the No. 1 main drainage pipe (1071); S4.

3. When the No. 1 main drainage pipe (1071) is extended, the No. 1 temporary water tank (1041) is cleaned simultaneously. The accumulated slag in the water tank is flushed out with high-pressure water and then pumped out through the clean water pump (110) to the slag discharge belt (116) and transported to the outside of the tunnel. The cleaning method of the No. 2 temporary water tank (1042) is the same as that of the No. 1 temporary water tank (1041).

10. The construction method of the continuous drainage system of a reverse slope tunnel constructed by a tunnel boring machine according to claim 5, characterized in that: The step S5 specifically includes the following steps: S5.1, the water tank and water pump in the shared cascade pump station (111) for the left and right tunnels also serve as the backup drainage system for the other tunnel; S5.

2. Start the backup drainage systems of the left and right tunnels simultaneously as needed to significantly increase the emergency drainage capacity and ensure the safety and smooth progress of tunnel construction.

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