双排钢板桩围堰结构加固优化分析研究

双排钢板桩围堰是上海地区水利工程中普遍使用的围堰形式,通过比较钢板桩典型支护结构的有限元数值计算结果和理论计算结果,验证了有限元模型参数的准确性,并针对围堰两侧堆载、被动区土体加固、拉杆布置等加固措施对围堰受力及变形的影响进行了深入研究,结果发现临土侧设置堆载、被动区土体横向加固及适当降低拉杆位置可以获得有效且经济的围堰内力及变形控制效果。

Analysis and Study on Reinforcement Optimization of Double-row Steel Sheet Pile Cofferdam Structure

Double-row steel sheet pile cofferdam is a form of cofferdam commonly used in water conservancy projects in Shanghai.In this paper,the accuracy of the parameters of the finite element model is verified by comparing the finite element numerical calculation results and the theoretical calculation results of the typical supporting structure of the steel sheet pile.The effects of reinforcement measures such as the stack load on both sides of the cofferdam,the soil reinforcement of the passive zone,and the arrangement of the tie rods on the stress and deformation of the cofferdam are further studied.The results show that the effective and economical control effects of the internal force and deformation of cofferdam can be obtained by setting the stack load on the side of the soil,laterally reinforcing the soil in the passive zone and appropriately reducing the position of the tie rod.