水表 - 旋翼式 - 15 - 40 mm - 螺纹

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CJT396-2012 鸭嘴式橡胶止回阀

CJT509-2016 拦污用栅条式格珊

各种单位转换公式

Google SketchUp Pro 8.0 FluidRaySketchUp_demo_1_1_0

This study presents a nonlinear optimization technique (NOT) for conducting the back analyses of geotechnical engineering problems based on the field observations. Additional auxiliary techniques are incorporated to enhance the convergence and stability of the NOT. The developed NOT and additional auxiliary techniques are incorporated into a finite element code and then applied to the back analysis of excavation-induced wall deflection. A number of hypothetical excavation cases with various scenarios of stratigraphy and two quality excavation case histories are used to validate the developed NOT, in which the dominant soil parameters are treated as target parameters. Results show that the wall deflections of all hypothetical and actual excavation cases at each stage can be accurately and efficiently backfigured.