Construction quality detection method of cement-soil walls based on temperature distribution monitoring

Abstract

In order to "quickly evaluate the construction quality of the cement-soil wall at the construction stage", the present invention provides a method for detecting the construction quality of the cement-soil wall based on temperature distribution monitoring. By setting up multi-point temperature measuring devices along the depth direction of each wall section of the cement-soil wall, the temperature distribution information of the cement-soil wall along the depth direction is collected, and the maximum temperature of each measuring point is extracted to form a temperature distribution characteristic curve. Taking advantage of the release of heat of hydration during the cement-soil hardening process, there is a corresponding relationship between the maximum temperature at the measuring point and the degree of cement-soil hardening in this section. Through previous accumulation and establishment of a typical characteristic curve library, using the temperature distribution characteristic curve of the current wall section, the "interval method" and "curve composite method" can be used to visually judge the uniformity, cement content distribution, and local defects of the wall section The key information such as the depth and position of the cement-soil wall can be obtained to obtain the overall level of the construction quality of the cement-soil wall, and provide a basis for the quantitative judgment of the water performance.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering construction, in particular to a method for detecting the construction quality of cement-soil walls based on temperature distribution monitoring. Background technique [0002] In the construction process of rock and earth underground engineering in soft soil and water-rich areas, cement-soil walls are often used as an effective means of waterproofing, water-stopping, and water-proofing. As the depth of underground space development continues to increase, the construction depth of cement-soil walls is also increasing, and at the same time, the difficulty of construction quality control is gradually increasing. Affected by stratum stratification characteristics and multiple factors of local water-rich strata, it is always difficult to guarantee the uniformity of the wall quality of the cement-soil wall along the depth direction of the wall. The actual effective thickness of the wal...

AI Technical Summary

Problems solved by technology

[0003] For the construction quality and waterproof performance evaluation of cement-soil walls, the general method is to evaluate the overall performance through a series of internal / external pumping tests after the construction of the entire wall. Once the waterproof performance fails to meet the standard, only Based on experience and some pumping test data, the area where the water seepage occurs can be roughly determined. In fact, it is impossible to accurately locate the problematic section of the cement-soil wall. To be on the safe side, the cement-soil wall in the suspected area can only be re-constructed on a large scale.

This method is an indirect estimation, which lacks the necessary accuracy for the evaluation of the construction quality and waterproof performance of the cement-soil wall, and because it is impossible to accurately locate the specific location of the actual defect of the cement-soil wall, the large-scale re-construction that has to be adopted eventually leads to Expensive and delayed construction period, lack of economy

At present, there is no direct and effective detection method to reasonably judge the wall quality of ultra-deep cement-soil walls

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