Inclined shaft type tunnel drainage pump house and its construction method

Abstract

The present invention provides an inclined shaft type tunnel drainage pump house, comprising an inclined shaft opened outside the tunnel side wall, the inclined shaft comprising a starting section and a water collection inclined shaft arranged obliquely downward, the water collection inclined shaft is connected to the tunnel through the starting section, the starting section is perpendicular to the length direction of the tunnel, a pump house is arranged below the starting section, the transverse drainage pipe and the longitudinal ditch in the tunnel are used to collect sewage and leakage water during the tunnel operation period, the longitudinal ditch is arranged along the length direction of the tunnel, the transverse drainage pipe is connected to the longitudinal ditches on both sides of the tunnel, the longitudinal ditch close to the inclined shaft is connected to the water collection inclined shaft through a transverse pipeline, the pump house is connected to the water collection inclined shaft through an overflow pipe, a water pump is arranged at the bottom of the pump house, and the water pump is connected to the tunnel through a drainage pipeline. The present invention also provides a construction method of an inclined shaft type tunnel drainage pump house.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering, and in particular to a drainage system in the operation period of a long tunnel project with a large pump room capacity requirement, and specifically to an inclined shaft type tunnel drainage pump room and a construction method thereof. Background Art

[0002] Long and large tunnels with a V-shaped slope usually have a drainage pump room at the lowest point to collect tunnel leakage water, cleaning wastewater and fire water and discharge them out of the tunnel in time. At present, most of the tunnel drainage pump rooms in China are set up in the tunnel or in the cross passage by vertical excavation, and water collection and drainage share the same room.

[0003] The existing drainage pump house has no major problems for tunnels with little water leakage and small pump house capacity requirements, but it is difficult to meet the use requirements for long and large tunnels with a lot of water leakage and large pump house capacity requirements. If the capacity is expanded by increasing the excavation depth, the construction cost will increase sharply and the pump house cleaning and maintenance will be inconvenient. With the increase of service life, when there is a long-term increase in groundwater infiltration and the drainage pump house needs to be expanded during the operation period, the feasibility of conventional vertical excavation shaft construction is very low due to site and operation conditions.

[0004] In addition, the existing drainage pump room and drainage share one room. When there are a lot of sediment and floating objects in the sewage, if they are not cleaned in time, it is very easy to cause the water pump to be blocked, thus affecting the normal pumping and drainage of the drainage pump room. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an inclined shaft type tunnel drainage pump room and a construction method thereof, which at least solves some of the problems in the prior art.

[0006] The present invention is achieved in that:

[0007] The present invention provides an inclined shaft type tunnel drainage pump room, comprising an inclined shaft opened on the outside of the tunnel side wall, the inclined shaft comprising a starting section and a water collection inclined shaft arranged obliquely downward, the water collection inclined shaft is connected with the tunnel through the starting section, the starting section is perpendicular to the length direction of the tunnel, a pump room is arranged below the starting section, the transverse drainage pipes and longitudinal ditches in the tunnel are used to collect sewage and leakage water during the tunnel operation period, the longitudinal ditches are arranged along the length direction of the tunnel, the transverse drainage pipes are connected with the longitudinal ditches on both sides of the tunnel, the longitudinal ditches close to the inclined shaft are connected with the water collection inclined shaft through transverse pipes, the pump room is connected with the water collection inclined shaft through an overflow pipe, a water pump is arranged at the bottom of the pump room, and the water pump is connected with the tunnel through a drainage pipeline.

[0008] Preferably, a filter screen is installed at the connection between the water collection inclined well and the overflow pipe.

[0009] Preferably, the overflow pipe is connected to the middle of the water collection inclined well.

[0010] Preferably, the transverse pipe is located below the starting section and above the overflow pipe.

[0011] Preferably, the pump room is arranged on one side of the starting section along the width direction.

[0012] Preferably, the pump room is capped with cast-in-place concrete.

[0013] Preferably, a maintenance hole is reserved on the top plate of the pump room.

[0014] The present invention also provides a construction method for an inclined shaft type tunnel drainage pump house, comprising the following steps: S1, a section of inclined shaft perpendicular to the tunnel is opened at the position of the tunnel side wall, the starting section is short and horizontal, and the subsequent water collection inclined shaft is excavated obliquely downward for use as water collection, and its length is set according to the capacity requirement; S2, a transverse pipeline is set below the starting section to connect the longitudinal ditch of the tunnel, and the tunnel seepage water and sewage collected in the ditch are discharged into the water collection inclined shaft; S3, a vertical shaft is excavated in the area on one side of the center line of the starting section by sinking and expanding as a pump room, the pump room is capped with cast-in-place concrete, and an inspection hole is reserved for inspection and maintenance of the pump room, and the center line of the starting section is The other side is used as a driving channel for sewage cleaning vehicles; S4. The pump room is connected to the water collection inclined shaft through an overflow pipe, and a filter is installed at the pipe mouth. The sand and gravel in the sewage are precipitated in the water collection inclined shaft, and the floating objects are filtered in the water collection inclined shaft. The upper clean water flows into the pump room through the overflow pipe, and the water in the pump room is pumped out through the drainage pipeline by a remote control switch; S5. After a period of operation, the vehicle is driven into the water collection inclined shaft to clean up the sedimentation and floating debris in the water collection inclined shaft; S6. When expansion is required, the length of the water collection inclined shaft is extended by excavation. Since the slope of the inclined shaft meets the vehicle driving conditions and does not occupy the tunnel clearance, the construction difficulty is low and has no impact on operation.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention can meet the requirements of low-cost and low-difficulty construction of a large-capacity drainage pump room, and realize the functions of convenient sewage cleaning and preventing water pump blockage in the drainage pump room during the tunnel operation period.

[0017] 2. Compared with the existing sunken drainage pump room, the inclined shaft length of the inclined shaft drainage pump room provided by the present invention is theoretically not limited. When building a large-capacity drainage pump room, the construction difficulty and construction cost of significantly increasing the length of the inclined shaft are much lower than significantly increasing the depth of the vertical shaft. Compared with the existing drainage pump room in which water collection and drainage share the same room, the water collection inclined shaft and the pump room are arranged separately, and the two are connected by an overflow pipe, and the filter net is combined to realize the function of sedimentation and accumulation of floating objects in the water collection inclined shaft. Therefore, there is no need to clean the pump room, which avoids clogging of the water pump by sediment and floating objects, and realizes the function of water and sewage separation. Since the slope of the inclined shaft meets the vehicle driving requirements, the vehicle can be directly driven into the water collection inclined shaft for cleaning, which is more convenient than the existing vertical shaft drainage pump room. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the plan layout of an inclined shaft type tunnel drainage pump house provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of an inclined shaft type tunnel drainage pump room provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0022] like Figure 1-Figure 2An embodiment of the present invention provides an inclined shaft type tunnel drainage pump room, comprising an inclined shaft opened on the outside of the side wall of a tunnel 12, the inclined shaft comprising a starting section 1 and a water collection inclined shaft 2 arranged obliquely downward, the water collection inclined shaft 2 is connected to the tunnel 12 through the starting section 1, the starting section 1 is perpendicular to the length direction of the tunnel 12, a pump room 3 is arranged below the starting section 1, a transverse drainage pipe 7 and a longitudinal ditch 8 in the tunnel 12 are used to collect sewage and leakage water during the operation period of the tunnel, the longitudinal ditch 8 is arranged along the length direction of the tunnel, the transverse drainage pipe 7 is connected to the longitudinal ditches 8 on both sides of the tunnel 12, the longitudinal ditch 8 close to the inclined shaft is connected to the water collection inclined shaft 2 through a transverse pipe 9, the pump room 3 is connected to the water collection inclined shaft 2 through an overflow pipe 5, a water pump 6 is arranged at the bottom of the pump room 3, and the water pump 6 is connected to the tunnel 12 through a drainage pipeline 11.

[0023] A filter screen 10 is installed at the connection between the water collection inclined well 2 and the overflow pipe 5. The overflow pipe 5 is connected to the middle of the water collection inclined well 2. The transverse pipe 9 is located below the starting section 1 and above the overflow pipe 5.

[0024] The pump room 3 is arranged on one side of the starting section 1 along the width direction, and the other side is used as a passage for sewage cleaning vehicles. The pump room 3 is capped with cast-in-place concrete, and a maintenance hole 4 is reserved on the top plate.

[0025] The existing long and large V-slope tunnels in my country generally use vertical excavation to set up a drainage pump room for collection and drainage at the lowest point, which is used to collect tunnel leakage water, cleaning wastewater and firefighting water and discharge them using water pumps.

[0026] From the perspective of drainage pump room capacity and pollution cleaning, the vertical excavation pump room has limited capacity. For long and large tunnels with large water leakage, the pump room capacity is difficult to meet the requirements. If the excavation depth is increased to expand the capacity, the construction cost will increase sharply and the difficulty of later pollution cleaning and maintenance will increase. In the drainage pump room where the collection and drainage share a room, the sediment and the water pump are in the same room. When there are a lot of sediments, it is very easy to cause the water pump to be blocked, affecting the normal drainage function of the drainage pump room. The present invention solves the technical problems of building a large-capacity drainage pump room with low cost and low difficulty, realizing convenient pollution cleaning, and preventing water pump blockage.

[0027] The present invention provides a method for setting up a drainage pump room in a long tunnel, which satisfies the requirements of low-cost and low-difficulty construction of a large-capacity drainage pump room, and realizes convenient sewage cleaning and prevents water pump clogging.

[0028] An inclined shaft perpendicular to the tunnel is opened at the side wall of tunnel 12. The initial section 1 is short and horizontal, and the subsequent section is longer and has a certain slope. It is used as a water collection inclined shaft 2. Its length can be estimated by capacity requirements (theoretically unlimited), and the slope of the inclined shaft must meet the vehicle driving requirements.

[0029] A vertical shaft is excavated in the area on one side of the center line of the starting section 1 by sinking and expanding, and its lower layer is used as the pump room 3. The pump room 3 is capped with cast-in-place concrete, and a maintenance hole 4 is reserved in the top plate for later personnel to enter the pump room 3 for inspection and maintenance.

[0030] The pump room 3 is connected to the water collection inclined well 2 through an overflow pipe 5 , and a water pump 6 is installed at the bottom of the pump room 3 .

[0031] The water is collected through the transverse drainage pipe 7 and the longitudinal ditch 8 in the tunnel 12 and discharged into the water collection inclined shaft 2 through the transverse pipe 9 above the pump room 3.

[0032] A filter net 10 is installed at the connection between the water collection inclined well 2 and the overflow pipe 5. Floating objects are filtered in the water collection inclined well 2, and solids such as mud and sand are settled at the bottom of the water collection inclined well 2. When the water level in the water collection inclined well 2 reaches the height of the overflow pipe 5, the upper clean water flows into the pump room 3 through the overflow pipe 5.

[0033] When the water in the pump room 3 reaches the control height, it is pumped out through the drainage pipe 11 by the remote control switch.

[0034] After a certain operating time, vehicles can drive in along the starting section 1 and the water collection inclined shaft 2 to clean up the sediment and floating objects.

[0035] If capacity expansion is needed after a certain number of years of operation, it is only necessary to expand and extend the length of the water collection inclined shaft 2. Since the slope of the inclined shaft meets the vehicle driving conditions and does not occupy the tunnel clearance, the capacity expansion is easy to implement and has little impact on operations.

[0036] The present invention can meet the requirements of low-cost and low-difficulty construction of a large-capacity drainage pump room, and realize the functions of convenient sewage cleaning and preventing water pump blockage in the drainage pump room during the tunnel operation period.

[0037] Compared with the existing sunken drainage pump house, the length of the inclined shaft of the above-mentioned inclined shaft drainage pump house is theoretically not limited. When building a large-capacity drainage pump house, the construction difficulty and construction cost of significantly increasing the length of the inclined shaft are much lower than significantly increasing the depth of the vertical shaft. Compared with the existing drainage pump house in which water collection and drainage share the same room, the water collection inclined shaft and the pump room are separated, and the two are connected by an overflow pipe, and combined with a filter net, the function of sedimentation and accumulation of floating objects in the water collection inclined shaft is realized. Therefore, there is no need to clean the pump house, which avoids clogging of the water pump by sediment and floating objects and realizes the function of water-waste separation. Since the slope of the inclined shaft meets the vehicle driving requirements, the vehicle can be driven directly into the water collection inclined shaft for cleaning, which is more convenient than the existing vertical shaft drainage pump house.

[0038] The inclined shaft type tunnel drainage pump house construction method provided by the present invention comprises the following steps:

[0039] S1, a section of inclined shaft perpendicular to the tunnel is opened at the side wall of tunnel 12. The starting section 1 is short and horizontal. The subsequent section (water collection inclined shaft 2) is excavated downward at a certain slope (the slope can meet the requirements of vehicle driving) for water collection. Its length is reasonably set according to the capacity requirements;

[0040] S2, a transverse pipe 9 is set below the starting horizontal section (starting section 1) to connect the longitudinal ditch 8 of the tunnel, and the tunnel leakage water and sewage collected in the ditch are discharged into the water collection inclined shaft 2;

[0041] S3, a vertical shaft is excavated in the area on one side of the center line of the starting horizontal section (starting section 1) by sinking and expanding as the pump room 3, the pump room 3 is capped with cast-in-place concrete, and a manhole 4 is reserved for inspection and maintenance of the pump room, and the other side of the center line of the starting section 1 is used as a passage for sewage cleaning vehicles;

[0042] S4, the pump room 3 is connected to the water collection inclined well 2 through an overflow pipe 5 at a certain height, and a filter screen 10 is installed at the pipe mouth. The sand and gravel in the sewage are precipitated in the water collection inclined well 2, and the floating objects are filtered in the water collection inclined well 2. The upper clear water flows into the pump room 3 through the overflow pipe 5, and the water in the pump room 3 is pumped out through the drainage pipe 11 by the remote control switch;

[0043] S5. After a certain operating time, the vehicle is driven into the water collection inclined well 2 to clean up the sediment and floating debris in the water collection inclined well 2;

[0044] S6. When the capacity needs to be expanded after a certain number of years of operation, the length of the water collection inclined shaft 2 can be extended. Since the slope of the inclined shaft meets the vehicle driving conditions and does not occupy the tunnel clearance, the construction difficulty is low and there is basically no impact on the operation.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An inclined shaft type tunnel drainage pump house, characterized in that: It includes an inclined shaft opened on the outside of the tunnel side wall, the inclined shaft includes a starting section and a water collection inclined shaft arranged obliquely downward, the water collection inclined shaft is connected with the tunnel through the starting section, the starting section is perpendicular to the length direction of the tunnel, a pump room is arranged below the starting section, the transverse drainage pipes and longitudinal ditches in the tunnel are used to collect sewage and leakage water during the tunnel operation period, the longitudinal ditches are arranged along the length direction of the tunnel, the transverse drainage pipes are connected to the longitudinal ditches on both sides of the tunnel, the longitudinal ditches close to the inclined shaft are connected with the water collection inclined shaft through transverse pipes, the pump room is connected with the water collection inclined shaft through an overflow pipe, a water pump is arranged at the bottom of the pump room, and the water pump is connected with the tunnel through a drainage pipeline; the construction method of building an inclined shaft type tunnel drainage pump room includes the following steps: S1, opening a section of inclined shaft perpendicular to the tunnel at the side wall of the tunnel, the starting section is short and horizontal, the subsequent water collection inclined shaft is excavated obliquely downward for use as water collection, and its length is set according to capacity requirements; S2, a transverse The pipeline is connected to the longitudinal ditch of the tunnel, and the tunnel seepage water and sewage collected in the ditch are discharged into the water collection inclined shaft; S3. A vertical shaft is excavated by sinking and expanding in the area on one side of the center line of the starting section as a pump room. The pump room is capped with cast-in-place concrete, and a maintenance hole is reserved for inspection and maintenance of the pump room. The other side of the center line of the starting section is used as a driving channel for sewage cleaning vehicles; S4. The pump room is connected to the water collection inclined shaft through an overflow pipe, and a filter is installed at the pipe mouth. The sand and gravel in the sewage are precipitated in the water collection inclined shaft, and the floating objects are filtered in the water collection inclined shaft. The upper clean water flows into the pump room through the overflow pipe, and the water in the pump room is pumped out through the drainage pipeline by the remote control switch; S5. After a period of operation, the vehicle is driven into the water collection inclined shaft to clean the sediment and floating debris in the water collection inclined shaft; S6. When expansion is required, the length of the water collection inclined shaft is extended by excavation. Since the slope of the inclined shaft meets the vehicle driving conditions and does not occupy the tunnel clearance, the construction difficulty is low and there is no impact on the operation.

2. The inclined shaft type tunnel drainage pump house according to claim 1, characterized in that: The overflow pipe is connected to the middle part of the water collection inclined well.

3. The inclined shaft type tunnel drainage pump house according to claim 1, characterized in that: The lateral pipe is located below the start section and above the overflow pipe.

4. The inclined shaft type tunnel drainage pump house according to claim 1, characterized in that: The pump room is arranged on one side of the starting section along the width direction.

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