Monitoring method for leakage of underground space waterproof curtain

Abstract

The invention discloses a monitoring method for leakage of an underground space waterproof curtain. The monitoring method comprises the following steps that: step 1, a monitoring area is established on the outer side of the underground space waterproof curtain; step 2, when the waterproof curtain leaks, an expansion object naturally expands after meeting water, so that a cantilever beam is bent upwards, and the capacitance value of an upper polar plate and the capacitance value of a lower polar plate are changed; and water on the outer side of the waterproof curtain flows to a leakage point, so that micro pressure is applied to an optical fiber, and the conduction characteristic of light in the optical fiber is changed; step 3, the capacitance value and the strain value collected by a single-chip microcomputer are sent to a data terminal through a wireless communication module; and a micro-motion pressure field signal is detected by a micro-motion sensing optical fiber; and step 4, theacquired signal is comprehensively analyzed to locate the position of a leakage point and evaluate the leakage intensity. According to the method, tiny leakage points of the waterproof curtain can beeffectively and accurately monitored, the leakage degree can be effectively and accurately evaluated, and dangerous events are avoided.

Description

technical field [0001] The invention relates to the technical field of leakage monitoring of water-stop curtains for underground space structures, in particular to a method for monitoring leakage of water-stop curtains for underground spaces. Background technique [0002] The water-stop curtain as an underground space structure often suffers from different degrees of leakage due to construction techniques or construction problems. When there is a difference in water head inside and outside the foundation pit, there will be different degrees of water leakage. The leakage of the water-stop curtain will have a great impact on the foundation pit itself and its surrounding environment. If the leakage is serious, it may also cause quicksand , Piping phenomena, leading to ground subsidence, pipeline rupture, building cracking, etc., and even life-threatening, so the leakage monitoring of the water-stop curtain in the underground space is particularly important, especially the preci...

AI Technical Summary

Problems solved by technology

[0005] However, in the actual application of the above-mentioned prior art, there are subtle leakage points that are missed. When there is a slight leakage, the monitored data does not change significantly, and there are potential safety hazards.

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