Cement-soil wall construction quality detection method based on temperature distribution monitoring

Abstract

The invention provides a cement-soil wall construction quality detection method based on temperature distribution monitoring in order to rapidly evaluate the construction quality of a cement-soil wallin the construction stage. A multi-point temperature measuring device is arranged on all wall sections of the cement-soil wall in the depth direction, temperature distribution information of the cement-soil wall in the depth direction is collected, the maximum temperature value of all measuring points is extracted, and a temperature distribution characteristic curve is formed. The characteristicof hydration heat release in the cement soil hardening process is utilized, and the maximum temperature value of the measuring point position has a corresponding relation with the cement soil hardening degree of the section. Key information such as uniformity, cement mixing amount distribution, depth positions of local defects and the like of a wall section can be intuitively judged by accumulating and establishing a typical characteristic curve library in the early stage, utilizing a temperature distribution characteristic curve of the current wall section and adopting an interval method anda curve compounding method, so that the overall level of the construction quality of the cement-soil wall is obtained, and a basis is provided for quantitative judgment of the waterstop 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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