Study On Smart Soil-cement Continuous Wall

SMW engineering method is a new construction technology. Due to the limitation of many factors, the method has not been widely used in engineering in China. In order to study the deformation law of steel in the excavation process, the author did a series of studies on the deformation of the H-pile. which were based on the renovation project of Wuhan.In this paper, it will make the H-pile intelligent based on the optical fiber sensing technology. The fiber optic laying on the surface of structure can get the strain and temperature in the excavation process. After data processing and analysis, the measurement results can be converted into physical quantities which can reflect the structure health. And finally, through the network, reports, text messages and some other ways tell users the results at the first time. Use the smart soil-cement continuous wall monitoring system, can achieve data-aware, measurement, processing, release, warning automation.Based on the renovation project of Wuhan, the study can get enough measurement results of strain during the excavation process. As the study completed successfully, it consummate ways that how to lay the optical fiber on the H-pile and computational theory, solving the problem that it is difficult to determine the neutral axis’ location while it is moving; achieving temperature self-compensation which can avoid lay the optical fiber on the H-pile; getting the deformation data the pit excavation support system of successfully, and able to analyze.Analyzing the deformation coordination between multi-rows of H-pile in the excavation process while the road was still open to traffic. Around the soil-cement continuous wall, the first row of H-pile will most soil pressure. With the displacement of the pile top which are8m long and18m long, can draw many conclusions:the displacement of the H-pile will change while the number of support increased and excavation depth changes. However, due to the long pile embedded in the soil body part more, the pile bottom can be fixed more stable, but the short pile have the opposite results, so the displacement of the short pile can be influenced easy. But early in the excavation, regardless of long pile or short pile, the first row displacement is smaller than the second or third row due to the support.In addition, using the finite element software ABAQUS to simulate field experiments. Then did the same analysis of the deformation data, and obtained the similar deformation law with field experiments, demonstrated the reliability of the experiment.