Multistage filtering and drainage system for deep-long water-rich tunnel underground water and construction method thereof

Abstract

The invention belongs to a multistage filtering and drainage system for deep-long water-rich tunnel underground water and a construction method thereof; the multistage filtering and drainage system for deep-long water-rich tunnel underground water comprises: a tunnel drainage precipitating system that includes a tunnel drainage ditch, a drainage ditch precipitating tank and a stagewise water-stirring pump; a shaft horizontal passage drainage system that includes a horizontal passage water ditch, a shaft precipitating tank and a lifting water pump; an underground sediment removal system; a small excavator for excavating a working face; a gantry crane and a lifting residue bucket for transferring excavation soil residue and removal precipitate in the drainage ditch precipitating tank and the shaft precipitating tank to a ground; a ground multistage filtering and precipitating system that includes a primary precipitating tank, a secondary precipitating tank, a tertiary precipitating tank and a quaternary precipitating tank; and an automatic sediment remover. The multistage filtering and drainage system for deep-long water-rich tunnel underground water and the construction method thereof have the advantages that water produced in the construction of a water-rich karst tunnel can be effectively discharged, a good construction environment is provided, the method is good in simplicity and practicality, the drainage and filtering effects are good, pollution treatment cost is low, sewage is recycled for in-situ reuse, and the service effect is good.

Description

technical field [0001] The invention belongs to a deep and long-distance water-rich tunnel groundwater multi-stage filtration and drainage system and a construction method. Background technique [0002] At present, with the implementation of the country’s policy of vigorously developing infrastructure, the construction of urban rail transit is in the ascendant, and the construction technology of subway tunnels has also been vigorously developed, especially in the construction of water-rich karst tunnels in complex environments with high buried depths and long distances. Whether the discharge of groundwater can be guaranteed is related to the safety and progress of the entire tunnel construction. At the same time, the filtration and sedimentation treatment of underground water in subway tunnel construction is also an important process and link in the tunnel construction process. [0003] Now the drainage of the water-rich karst tunnel construction under the complex environme...

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Problems solved by technology

[0004] First, the underground drainage distance of the tunnel is long. The maximum drainage distance of the small mileage is 326.85 meters, and the maximum drainage distance of the long mileage is 490m. The conventional underground water drainage system of the tunnel cannot meet the requirements, and the drainage effect is poor. , the ground is muddy, which has a great impact on construction, time-consuming and laborious drainage, and high cost of pollution control

[0005] Second, in the construction of tunnels in water-rich strata, the groundwater flow is large, and the conventional drainage system cannot meet the tunnel construction requirements of timely drainage and waterless operations

[0006] Thirdly, construction in karst strata, karst caves are developed, and the filling materials are mostly clay and gravel, and the groundwater contains a lot of sediment. Water brings inconvenience to surrounding residents

[0008] Fifth, in the construction of water-rich karst tunnels, the content of underground cement and sand is large, and the conventional groundwater drainage system cannot meet the requirements of sedimentation and filtration, and the filtered groundwater still cannot meet the requirements of direct discharge

[0009] Sixth, the sediment content is large, and the sediment dredging work is difficult, and the conventional groundwater drainage system cannot meet the requirements of sediment dredging

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