进入二十世纪以来，城市建设规模的不断升级，地面空间越来越不能满足人们的

Since the beginning of the twentieth century, the construction scale of urban escalating, more and more floor space can not meet people's needs, people began to look to the ground, looking for space for urban development, namely the development and utilization of urban underground space. The underground space development and construction of the first is the excavation. With the vigorous development of underground space, regardless of excavation depth and breadth of scale become more and more, construction technical requirements are also increasing, especially in complex geological and hydrological conditions of the environment, how reasonable excavation solve the problem is the main problem faced by the construction pit. Systematically set forth herein TRD construction method, i.e., stirred tank in the saw guard applied to the foundation pit underground continuous wall method.

Since the beginning of the 20th century, the scale of urban construction has been continuously upgraded, the ground space is becoming more and more unable to meet people's needs, people began to turn to the underground, looking for urban development space, that is, the development and utilization of urban underground space. And the development and construction of underground space is the first to be the foundation pit project. With the vigorous development of underground space, the scale of the foundation pit project from the depth and breadth is becoming larger and larger, and the construction technology is more and more demanding, especially in various complex geological conditions and hydrological environment, how to solve the foundation pit support problem reasonably is the main problem facing the current pit construction. This paper expounds the TRD work method, that is, the method of using saw grooves to stir into underground continuous walls in the base pit support.

Since the 20th century, with the continuous upgrading of urban construction scale, the ground space can not meet the needs of people more and more. People began to turn their eyes to the underground to seek the space for urban development, that is, the development and utilization of urban underground space. And the development and construction of underground space is the foundation pit project. With the rapid development of underground space, the scale of foundation pit engineering from depth and breadth becomes larger and larger, and the construction technology requirements are higher and higher. Especially in various complex geological conditions and hydrological environment, how to reasonably solve the problem of foundation pit support is the main problem that foundation pit construction is facing at present. In this paper, TRD method is systematically described, that is, the method of using saw slot to mix into diaphragm wall in foundation pit support.<br>