三峡永久船闸闸墩-锚杆-岩基的非线性耦合分析

NONLINEAR COUPLING ANALYSIS OF LOCK WALLS,BOLTS AND THEIR FOUNDATIONS OF THE THREE GORGES SHIP LOCK

建立分析了结构与岩基接触问题的非线性物理方程式，并采用“变增量搜索法”迭代方案求解三峡船闸闸墩-锚杆-岩基的相互作用问题。将三峡船闸在施工及运行过程中，由温度荷载和水压力、渗压力等外荷载共同作用下的复杂空间接触问题，分解为求解温度引起的结构与岩基接触面的张开度和由此作初间隙研究外荷载作用下整个系统的变化规律和应力状况。详细分析了锚杆自由长度对锚杆内力分布的影响。研究结果已得到实际应用，研究方法可用于同类结构的空间多体接触问题的求解。

Nonlinear equations used for the analysis of the contact problem between thestructures and their foundations are established. The iteration method, variable incrementsearching method, is adopted to solve the interaction problem among the lock walls, boltsand their rock foundation. A complicated nonlinear three dimensional contact problemcaused by temperature, water pressure and seepage pressure during or after construction isdivided into two parts for study. The first part is to solve the opening problem betweenthe structures and their foundations caused by temperature. In the second part, theopenings are regarded as initial joint spacings and the laws of the variations and thestresses of the whole system under external loads are studied. And the fact that the freelengthes of the bolts affect the distribution of their internal forces is discussed in detail.The results obtained have been used in practice.