A facility and method for preventing geomembrane damage caused by subsidence around a water inlet tower

Abstract

The invention discloses a facility and method for preventing peripheral settlement of an intake tower from causing geomembrane damage. The facility comprises a grouting device and a settlement amountdetection device. The grouting device comprises a grouting machine, a grouting main pipe and multiple grouting branch pipes. The grouting main pipe is vertically arranged in the intake tower, the topof the grouting main pipe stretches out of the intake tower and is connected with the grouting machine, and the multiple grouting branch pipes are arranged at the bottom of the grouting main pipe in aradial shape. The settlement amount detection device is used for detecting the settlement amount of a reservoir around the intake tower and comprises an ultrasonic transceiver and a reflection plate.By means of the facility and method, the settlement amount detection device monitors differential settlement of a foundation around the intake tower regularly, once it is found that the settlement difference exceeds the allowable value, the grouting device carries out grouting on the settlement area in time, and differential settlement is eliminated; and if it is found that large settlement happens to the foundation again, the settlement area can be subjected to grouting repeatedly, and the problem of pulling destroying caused by too large geomembrane deformation due to foundation differential settlement around the intake tower is thoroughly solved.

Description

technical field [0001] The invention relates to the technical field of prevention and control in water conservancy projects, in particular to a facility and a method for preventing geomembrane damage caused by settlement around a water inlet tower. Background technique [0002] Geomembrane is a kind of flexible waterproof material with excellent anti-seepage performance, and has been widely used in reservoir pan anti-seepage. For example, the upper reservoir of the Liyang Pumped Storage Power Station in Jiangsu Province uses geomembrane to prevent seepage, and has achieved good anti-seepage effects. However, there were two serious leakages during the initial impoundment of the project. After the reservoir was emptied, it was found that the leakage area occurred at the connection between the geomembrane and the concrete water intake tower structure. There was obvious uneven settlement of the foundation where the geomembrane was damaged (section The first maximum settlement i...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a facility for preventing geomembrane damage caused by subsidence around the water inlet tower against the above-mentioned deficiencies in the prior art. The facility for preventing geomembrane damage caused by settlement around the water inlet tower can be regularly monitored The uneven settlement of the foundation around the water tower, when the settlement exceeds the allowable value, the grouting device will grout the settlement area in time to eliminate the uneven settlement and ensure that the cushion under the geomembrane is stable and reliable to meet the safe operation requirements of the geomembrane during the operation period , completely solved the problem of tensile damage caused by excessive deformation of the geomembrane caused by uneven foundation settlement around the water inlet tower

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