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Monitoring method for leakage of underground space waterproof curtain

A water-stop curtain and underground space technology, which can be used in liquid-tightness measurement using liquid/vacuum degree, fluid-tightness test, machine/structural component test, etc. It can solve potential safety hazards and inconspicuous data changes, etc. problem, to achieve the effect of accurate real-time monitoring

Inactive Publication Date: 2021-03-05
李金芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Monitoring method for leakage of underground space waterproof curtain
  • Monitoring method for leakage of underground space waterproof curtain
  • Monitoring method for leakage of underground space waterproof curtain

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as Figure 6 As shown, the present invention discloses a monitoring method for monitoring leakage of water-stop curtains in underground spaces, comprising the following steps:

[0038] Step 1: Establish a monitoring area on the outside of the water-stop curtain in the underground space, divide the monitoring area into n rectangular sub-areas of the same size, place an inner sensor module and number it in each rectangular sub-area, and place a micro sensor module on the outside of the water-stop curtain. Motion sensing fiber.

[0039]Step 2: When the water-stop curtain leaks, the expander 10 expands naturally after encountering water, causing the cantilever beam 8 to bend upwards, which in turn causes the strain gauge 6 to bend, causing the resistance value of the strain gauge 6 to change. The expansion material 10 absorbs moisture, and causes the medium and distance between the upper pole plate 9 and the lower pole plate 11 to change at the same time, so that the ...

Embodiment 2

[0043] Such as Figure 3-5 As shown, a water-stop curtain leakage monitoring device for underground space, the water-stop curtain leakage monitoring device includes an inner sensing system composed of a plurality of inner sensing modules, an outer optical fiber system and a data terminal 4; The sensing module includes a composite wet pressure sensor 2, a micro-motion sensing optical fiber, a single-chip microcomputer 1, and a wireless communication module 3; the composite wet-pressure sensor 2, the wireless communication module 3 are connected to the single-chip microcomputer 1; The optical fiber and the optical time domain reflectometer arrange the micro-motion sensing optical fiber along different monitoring areas, and connect the optical time domain reflectometer; the optical time domain reflectometer and the inner sensing system are connected to the data terminal 4 .

[0044] The composite wet pressure sensor 2 comprises a strain gauge 6, a cantilever beam 8, an upper pole...

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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...

Claims

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Application Information

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IPC IPC(8): G01M3/04G01D21/02E02D19/18E02D33/00
CPCE02D19/18E02D33/00G01D21/02G01M3/045G01M3/047
Inventor 李金芳
Owner 李金芳
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