Testing method and apparatus of breast wall slurry pressure in underground continuous wall trench construction

Abstract

The invention provides a testing method of wall-protection slurry pressure during the trough-forming construction of the underground continuous wall and a device thereof, belonging to the technical field of building engineering. The invention is characterized in that a hook of a sleeving ring is tied with a measuring rope having graduations; a pressure sensor is arranged in the sleeving ring; the data transmission lead of the pressure sensor and the measuring rope which is tied on the sleeving ring are led out of the trough hole of the sleeving ring together and connected on a lifting frame; the pressure sensor is slid into the trough section by the lifting frame so as to carry out the measuring and reading operation of the pressure sensor; the pressure sensor is lifted upwards subsequently and the measuring and reading of the pressure sensor are carried out repeatedly; the slurry pressure results measured in the same depth are averaged; scattered data of the relationship between depth and slurry pressure is drawn; the scatter data is fitted so as to gain the slurry pressure distribution in different depths in the trough section. The testing method and the device of the invention can exactly measure the wall-protection slurry pressure during the trough-forming construction process of the underground continuous wall, with exact and reliable measuring results.

Description

technical field [0001] The invention relates to a testing method and a device in the technical field of construction engineering, in particular to a testing method and a device for protecting wall mud pressure in groove-forming construction of an underground diaphragm wall. Background technique [0002] The so-called underground diaphragm wall construction method is to use a special groove-forming machine in advance, along the deep foundation or the periphery of the underground structure, use bentonite thixotropic mud to protect the wall, excavate a groove section with a certain depth and section, and then place it in the groove section. into a prefabricated steel cage, and use underwater pouring concrete to form wall sections, such continuous construction, so that the wall sections are connected to each other to form a complete underground continuous wall with soil retaining and waterproof functions, and can also be used as the main underground structure or part thereof. B...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the deficiencies in the above-mentioned prior art, and proposes a method and device for testing the mud pressure of the retaining wall in the groove-forming construction of the underground diaphragm wall, which overcomes the poor accuracy of the test results and the poor accuracy of the obtained test results in the conventional mud hydrometer method. The disadvantage of the limited number of sampling points has the advantages of high monitoring accuracy and a large number of monitoring data points, which greatly improves the data accuracy and test efficiency of on-site testing, and has strong practicability

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