Method and device for monitoring seepage of underground diaphragm wall of foundation ditch of building

Abstract

The invention relates to a method and device for monitoring the seepage of an underground diaphragm wall of a foundation ditch of a building. The method comprises the following steps of: (1) constructing a borehole at the center of the foundation ditch, arranging a power supply electrode A at the bottom of the borehole, and arranging another power supply electrode B at a place 7-10 times of the length of the foundation ditch away from the center of the foundation ditch; (2) arranging detection points on the ground surface along the underground diaphragm wall in a manner of surrounding the foundation ditch, and arranging a measuring electrode M and a measuring electrode N at each detection point along the direction vertical to the underground diaphragm wall; (3) marking out planar positions with abnormal formula (shown in a drawing); (4) marking out vertical elevations with the abnormal formula (shown in the drawing); and (5) obtaining positions corresponding to the planar positions with the abnormal formula obtained in the step (3) and the vertical elevations with the abnormal formula obtained in the step (4), thereby obtaining positions in seepage. The invention further relates to a device for monitoring the seepage of the underground diaphragm wall of the foundation ditch of the building. By using the method and device for monitoring the underground diaphragm wall of the foundation ditch of the building, the damage to an underground diaphragm wall body can be avoided, and the operation is very simple and convenient.

Description

technical field [0001] The invention relates to a method and a device for monitoring leakage of an underground continuous wall of a building foundation pit. Background technique [0002] High-rise buildings, subways, bridges, tunnels, etc. often use deep foundations, and deep foundation pits must be excavated. In order to ensure the normal construction of the foundation pit and prevent the surrounding buildings (structures) from being affected by the excavation of the foundation pit from uneven settlement, displacement or even collapse, the supporting retaining piles and underground diaphragm walls are often designed and constructed around the foundation pit, so as to Support the lateral pressure from the surrounding area and cut off the hydraulic connection between the foundation pit and the surrounding area. The underground diaphragm wall is a concealed project. The pouring of its concrete body often has quality problems due to complex underground conditions or unpredicta...

AI Technical Summary

Problems solved by technology

Both of these two methods have certain damage to the underground continuous wall, and both can only be sampled and tested in a certain proportion, and it is impossible to pull cores or bury pipes everywhere.

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