The Experimental Study Of Diaphragm Wall Panel Trench By Micro-voltage Method

With the development urban construction of China,there are more and moreHigh-rise building in more and more modern city.Tall building need deep foundation,so the depth of the foundation also increasing with the height of the building.Retaining and protecting for deep foundation excavation requires a lot higher thanbefore, also brought huge challenges to the construction schedule and constructionsafety. With the dewatering of deep foundation pit,the construction quality of theSealing Curtain have a direct impact on the progress of the project and the personalsafety of the construction workers. Current building envelope detection method cannot meet our requirements on high accuracy and low prices,so we need to find a newmethod to find out the weak position on sealing curtain through fast, non-destructivedetection technology. This will greatly enhance the personal and property safety of theconstruction process, and provide greater help to control the entire cost of the project.In this paper we design a test that can easily carried out at the construction sitebased on the detection technology of pit leakage by micro voltage. Take the Soilresistance as the main variable, we make great effort to find a leak detection methodapply to Tian Jin.The content of this article are the following aspects:1.Analyzed with the main methods and principles of underground continuouswall leakage detection technology.2. Make in-depth understanding of the theory of the resistivity of the soil.3. Design field trials, recording the change of the detected voltage in the differentleakage depth case and analysis the regular pattern.4. Make a certain understanding of the database technology and the record the testdata and field leakage.5. Preparation java program, prepare for the query of data stored in the database。The conclusions drawn in this article the following：1. The results of the model test indicate that we can achieve destructive testing ofpit ground wall leakage by analyzing the value of the electrode voltage. 2. By simulate vertical plane leakage points in horizontal plane,.we can getscatter plot curve which represent the detection electrode voltage change with theleakage depth.3. Even if the size of the venue is limited, we can take advantage of the detectiontechnology in leak detection to determine the depth of the leakage point.This paper shows the micro-voltage method detection pit leakage model test havepractical application significance. With the deepening of the trial we will takeadvantage of the non-destructive testing of micro-voltage method to accuratelycomplete the pit leak.