A structure for dredging the barrier effect of underground engineering on groundwater

Abstract

The invention discloses a structure for dredging barrier of underground engineering on a seepage field. The structure is characterized by comprising a guide subsystem and a water level automatic monitoring subsystem, wherein the guide subsystem comprises a water leaking hole, a guide pipe, a conservation hole and filter screens; the water level automatic monitoring subsystem comprises a probe, a data sensor and a dial plate; a submersible pump is arranged in the guide pipe; one end of the guide pipe is the water leaking hole, and the other end is the conservation hole; and the filter screens are arranged outside the water leaking hole and the conservation hole. The structure is suitable for current national construction technology level of underground engineering, can adjust the water stop characteristics of various underground structural objects to protect the underwater seepage environment, and is suitable for the installation of open excavation and underground excavation construction underground engineering.

Description

technical field [0001] The invention relates to a structural measure for dredging underground structures to block seepage fields, which is suitable for all underground projects of open and hidden excavation construction, and has wide application prospects in the fields of water conservancy, transportation, construction, municipal administration, underground rails and the like. Background technique [0002] When a large-scale underground structure project passes through some relatively thin aquifers, and the direction of the underground structure intersects with the direction of groundwater flow at a large angle, it may hinder the flow of groundwater and cause changes in the seepage field within a certain area, mainly manifested as underground structure The high water level on the upstream surface, the decrease in the groundwater level on the back surface, and the reduction in the total amount of lateral runoff within the affected area can eventually induce a series of seconda...

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Problems solved by technology

[0002] When a large-scale underground structure project passes through some relatively thin aquifers, and the direction of the underground structure intersects with the direction of groundwater flow at a large angle, it may hinder the flow of groundwater and cause changes in the seepage field within a certain area, mainly manifested as underground structure The high water level on the upstream surface, the decrease in the groundwater level on the back surface, and the reduction in the total amount of lateral runoff within the affected area can eventually induce a series of secondary engineering and environmental problems, such as: (1) Upstream water level obstruction If the water level is too high, it will have adverse effects on the nearby projects that have not considered the anti-floating structure well. The lower water level in the downstream will cause the effective stress in the soil to increase, which will cause the problem of surface settlement; (2) The increase of the local hydraulic gradient near the underground structure will cause the problem of soil seepage damage (3) Due to the reduction of lateral runoff and groundwater flow velocity, it will also cause the deterioration of upstream water quality and the depletion of downstream water resources, which will cause water supply problems for residents, ecological problems, and groundwater pollution problems, etc.

[0003] Japan's "Groundwater Flow Preservation Measures" is an earlier and more comprehensive diversion measure in the world for the barrier effect of underground engineering on seepage fields, and it has been widely used in Japan. There are certain difficulties, and at the same time, there is a lack of corresponding convenient monitoring and maintenance measures, which is not convenient for summarizing relevant experience and improving the technical level, and there are also deficiencies in the determination methods of some technical parameters (such as the spacing and size of the diversion subsystem, etc.), which is not convenient for practical application

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