Measuring method for cross section of base in sinking process of open caisson

Abstract

The invention relates to a measuring method for the cross section of a base in a sinking process of an open caisson. The method comprises the following steps that positioning piles and a mounting frame are fixed at the periphery of the open caisson; disturbance sediment of the open caisson is achieved; equipment erection is analyzed, and testing operation is carried out; an equipment error is measured and calibrated; a sonar probe is connected, and the sonar probe is subjected to direction determination; a hoisting assembly is started to distribute the sonar probe; image information is collected and recorded; sonar images with different heights from the bottom are obtained; and post-processing of sonar data is carried out. According to the measuring method for the cross section of the basein the sinking process of the open caisson, on-site analysis is carried out according to the sonar scanning result at the bottom of the open caisson to obtain the sonar images with different heightsfrom the bottom so that post-processing of the sonar data is facilitated, the sonar image detection implementation is simple in operation, the terrain in the open caisson is presented in an image form, the result resolution is high, the intuitiveness is strong, the operation efficiency is high, the distribution condition of obstacles at the bottom of the open caisson is judged, project construction is effectively guided, well wall collapse and open caisson landform can be conveniently monitored, and the project construction efficiency is improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method for measuring a base cross section during caisson sinking. Background technique [0002] During the construction, some buildings are buried deeply, the water content in the soil is high, and the groundwater level is high. It is difficult to solve the drainage problem after large-scale excavation, and the cost increases a lot; Suitable for large excavation construction. Under the above circumstances, caisson construction is a better construction method. [0003] At present, caisson construction is a mature construction technology, which is widely used in deep pits, basements, pump rooms, deep equipment foundations, bridge piers, wharves and other projects. However, due to the uneven bearing capacity of the foundation soil and the influence of groundwater in caisson construction, During caisson construction, it is more difficult to control the verticality and positio...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned technology has the following defects: it can play a good role in caisson subsidence depth and caisson correction, but it cannot detect the specific landform in the well, and cannot monitor well wall collapse and bottom landform well. Simple

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