Filed Test Study Of Cement Mixing Anchor Pipe In Soft Soil Foundation Pit

Cement mixing anchor pipe is a new type of soil nailings and soil anchors, in recent years in Hangzhou, Shaoxing and soft soil areas has been applied and good economic and social benefits. However, cement mixing anchor pipe construction technology is not yet mature, the study on the working mechanism is still blank, designed to mainly depend on experience. The backword research work constraints further development of the cement mixing anchor pipe.Based on the research of the soil nailing, composite soil nailing, soil anchor support technology and the practical of the current cement mixing anchor pipe, construction technology, pull-out characteristics is studied by methods of traditional theoretical research, field testing, Some beneficial results of the mechanism and behaviors of cement mixing anchor pipe are achieved. Main research contents as follows:(1) Describes the soil nailing, composite soil nailing, and soil anchor support technology the emergence and development of the summary of their characteristics and in the soft soil foundation pit of the situation.(2) Summed up the cement mixing anchor pipe stucture, construction technology and on-site monitoring requirements.(3) According to different parameters were carried out on-site construction forming tests and pull-out tests, a study of the various construction parameters on the forming quality and ultimate pullout force of cement mixing anchor pipe.