仙台水库泄洪冲沙闸基础处理设计

Foundation treatment design of flood discharge and sand washing gate for Xiantai reservoir

仙台水库泄洪冲沙闸部分基础为低液限粘土，由于低液限粘土结构松散，承栽力较低，为80～120kPa，不满足应力要求，需进行加固处理。考虑高压旋喷桩复合地基既适用于黏性土地基，也适用于碎石土地基，且具有施工简便、施工占地少、桩体耐久性较好，技术成熟等优点，故地基处理采用高压旋喷柱进行加固，有效地提高了基础的承栽力，对泄洪冲沙闸的安全运行提供了可靠保障。

The partial foundation materials of flood discharge and sand washing gate is the low liquid limit clay for the Xiantai reservoir. Because of the loose structure and low bearing capacity from 80 k Pa to 120 k Pa for the low liquid limit clay, the stress request cannot be satisfied, and then the foundation should reinforcement treatment. The high pressure jet grouting pile composite foundation is suitable for both the clayey foundation and the gravelly soil foundation, which has advantages of the simple construction, less land occupation, better durability of the pile and mature technology. The high pressure jet grouting pile is used in the construction of the foundation reinforcement, which could improve effectively the bearing capacity of the foundation and provide the reliable guarantee for the safe operation of the flood discharge and sand washing gate.