Study On Numerical Simulation And Application Of Cement Soil Wall And Cement Soil Anchors Support In Deep Excavation

The traditional cables (pole) need to be pre-hole, when pre-hole it is easy to whole collapse or shrinkage if the soil is saturated silt, saturated sand and soft soil, in this case it would take more time-consuming, costly wall protection measures. The cement wall and cement anchor retaining structure is an effective technology of soil support and reinforcement. It is characterized the drilling, grouting, stirring, and reinforcing at once. It applies to the support of excavation and soil reinforcement in sand, clay, silt, miscellaneous fill, loess, silt, silt soil and other soil. The role of cement wall and cement anchor in the mechanism and characteristics to the theoretical research are still far behind in engineering practice. In this paper we use the finite difference analysis method to cement wall and cement anchor support technology research. The study includes:(1)We starting from the Constitutive relations of soil, use FLAC3D finite difference software, establish the two-dimensional finite difference model of the cement walls, cement soil anchor body and contact surface of cement walls and Pit soil(2)In the area of Handan city east part, one commercial square as an example of deep foundation pit engineering, we simulate and analyze the cement soil wall-cement soil anchor support structure; we get the displacement simulation results to foundation pit of the retaining structure. We compare the simulation results with the monitoring data, to verify the simulation is correct and reasonable.(3)Analysis of construction process and the application environment of cement soil wall-cement soil anchor, combined with the simulation results and actual engineering monitoring data, validated in Handan east and northeast region using the supporting structure of cement soil wall-cement soil anchor is reasonable and economical.It showed that the cement wall and cement anchor retaining structure has a good ability to control for Pit deformation, and the structure itself has a higher over all stability with the numerical results.With the result of this paper, it has a good reference to the further understanding the mechanism of the cement wall and cement anchor and guiding its application in practical engineering.