Abstract: The element birth and death of ANSYS was used to simulate the construction process, while contact elements were set between lock wall and backfill soil and between lock bottom board and ground soil in order to simulate slip characteristics between above mentioned interfaces. D-P model was used to simulate the non-linear characteristics of the soil. The structure of whole-lock bay was simulated by non-linear FEM method, and its mechanical behavior at various construction stages was researched. The proposed method was compared with the calculation method commended by lock design code. The research results indicate that construction method of “lock wall and bottom board pouring separately, and being sealed later” has remarkable effect on the internal force of lock bay structure and displacement. The internal force values of lock bay structure obtained by above two calculation methods have remarkable difference, the calculation method commended by lock design code overrates the tensile stress value of lock bottom board and lock wall, and it is inclined to be conservative. While, the adoption of construction method of “lock wall and bottom board pouring separately, and being sealed later” can effectively reduce the tensile stress value of lock bottom board and lock wall. It is recommended that the design of lock should reserve a surplus width value while the construction method of “lock wall and bottom board pouring separately” is used for the safety of navigation in the lock chamber.

Key words: waterway engineering;construction method, mechanical behavior

摘要： 利用ANSYS的“生死单元”功能模拟施工过程，在闸墙与回填土之间、闸底板与地基土之间设置接触单元模拟接触面滑移特性，采用D-P模型模拟土体的非线性特性，对整体式闸室结构进行非线性有限元分析，研究了各施工步闸室结构的受力特性，并与船闸规范推荐的计算方法进行比较。研究结果表明：整体式闸室 结构采用的“分缝施工”方法对结构内力和位移有较大影响。两种计算方法得出的结构内力有较大的差异，采用“分缝施工”方法能有效减少闸墙与底板的拉应 力，规范法对完建期底板及闸墙的拉应力计算值偏大，取值偏于保守；采用“分缝施工”方法有可能造成闸室有效宽度减小，建议设计中应预留一定闸室宽度富 裕值，以保证船闸安全通航需要。

关键词: 航道工程, 施工方法, 受力特性