双壁钢套箱锁口围堰拼装施工技术

Double Wall Steel Boxed Locking Assembly Cofferdam Construction Technology

采用基底应力附件固结法计算孔隙率方法与土力学中孔隙率,得到一种高效、高精度的有限元单元分析钢管混凝土柱在扭矩作用下的非线性弹塑性行为方法,实现对强振动下的钢管混凝土结构断裂预测,并分析钢管混凝土柱在往复扭矩荷载作用下的受力行为。对围堰水模型进行冲击模型构建,采用Sierpinski地毯和Menger海绵分形模型设计,采用网格划分方法保证精度的同时显著减少单元数量,提高建筑强度。试验得出,该施工模型能使得基底应力消散时间约为5~7 d,能有效满足基底的排水固结处理时间,从而使得各层土的水平位移基本维持在50 mm以内,地基承载力特征值可达160k Pa,满足设计要求的120 k Pa,提高承压能力。

Allocation model design is obtained. Porosity by substrate stress attachment consolidation method to calculate porosity method and soil mechanics, get the finite element analysis of unit of a high efficiency, high precision of steel pipe concrete column under the torque nonlinear elastic plastic behavior method, realize the fracture prediction of concrete filled steel tubular structure under strong vibration, and force analysis in reciprocating the torque load of concrete filled steel tu- bular column. The cofferdam of water model impact model, using Sierpinski and Menger sponge carpet fractal model design, using the method of grid division accuracy while significantly reducing the number of units, improve the construction strength. The test results show that the model can make the construction base stress dissipation time is about 5-7 D, can effectively meet the drainage consolidation treatment time of the substrate, so that the horizontal displacement of each layer soil basically maintained within 50 mm value of up to 160 kPa of foundation bearing capacity characteristics, to meet the design requirements of 120 kPa, increases the bearing ability.