Subway interval separation type wastewater pump room structure and construction method thereof

Abstract

The invention discloses a subway interval separation type wastewater pump room structure. The subway interval separation type wastewater pump room structure comprises a steel pipe sheet lining at thelowest point of a tunnel, grouting reinforcement is conducted on a soil body on the periphery of a steel pipe sheet, and a jacking hole is reserved in the lower portion of the steel pipe sheet; a steel support is detachably installed in the steel pipe sheet, wherein a jacking structure is arranged on the steel support; the jacking structure comprises a jacking pipe arranged at the jacking hole ina matched mode and a driving mechanism for driving the jacking pipe to enter the lower portion of the steel pipe sheet from the jacking hole; and pipe joints are further arranged between the driving mechanism and the jacking pipe, and the driving mechanism is contracted to splice the pipe joints. According to the subway interval separation type wastewater pump room structure and a construction method thereof, a wastewater pump room is arranged at the bottom of the steel pipe sheet at the lowest point of each interval tunnel, the space is small, and the defects that in the prior art, the wastewater pump room is large in size and that the risks of water gushing, sand gushing and foundation instability are likely to happen during manual excavation can be overcome.

Description

technical field [0001] The invention relates to the technical field of subway section tunnel engineering, in particular to a subway section separated wastewater pumping room structure and a construction method thereof. Background technique [0002] In order to collect the seepage water and fire-fighting wastewater of the subway section tunnels, it is necessary to set up a wastewater pumping station at the lowest point of the section tunnels. The wastewater pump station is mainly composed of sump, drainage pump and pressure drainage pipeline. Since the height of the track in the shield section of the subway is about 760mm, and a reinforced concrete integral track bed is used, the space and height under the rail are limited, and it is difficult to arrange a wastewater pump room in the shield tunnel section. In the prior art, the waste water pump room in the ordinary subway section adopts the joint construction method with the communication channel, that is, excavates and arra...

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Problems solved by technology

For this kind of wastewater pump room in the subway section, since the wastewater from the two tunnels in the subway section is discharged into the wastewater pump room, the volume requirement of the wastewater pump room is relatively large, and the corresponding excavation range and depth are also relatively large. During the construction process Risks of water gushing, sand gushing, and foundation instability are prone to occur; in addition, the drainage pipe of the wastewater pump room is usually set outside the communication channel structure, and the drainage pipe needs to pass through the ground from the steel pipe sheet to enter the pump room, and the risk of water gushing and sand gushing is prone to occur during drainage pipe construction ; In addition, in the prior art, the waste water pump room used to collect the waste water in the interval is built together with the communication channel used for the evacuation of the area. Because the waste water pump room must be set at the lowest point of the interval, it also greatly limits the location of the communication channel. selection, and sometimes even set up more communication channels to meet the evacuation requirements of the section, resulting in project waste

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