赵晓磊

摘要：本文依托于大连市新监管场所建设项目，对超高加筋挡土墙的质量控制要点进行了简要说明。根据本项目的地质特征，全风化页岩或土质厚度小于4m的，通过开挖后加筋土到底;对于地基土质为粉质粘土或次生红黏土厚度大于4m的，采用CFG桩复合地基处理;对于高度18m的超高挡土墙，采用三阶分级加预制模块设计，并根据不同高度的挡土墙采用不同拉伸强度的土工格栅。对于施工阶段的质量控制要点进行了简要说明。

关键词：加筋挡土墙土工格栅质量控制地基承载力

中图分类号 U417.1+15         文献标识码 A

Quality Control Points of Super High Reinforced Retaining Wall

ZHAO Xiaolei

（Dalian Port Construction Supervision & Consulting Co.， Ltd. ， Dalian， Liaoning Province， 116000 China）

Abstract：Based on the construction project of new supervision site in Dalian， this paper briefly explains the key points of quality control of ultra-high reinforced retaining wall. According to the geological characteristics of the project， if the thickness of completely weathered shale or soil is less than 4m， the reinforced soil shall be excavated to the bottom; if the foundation soil is silty clay or secondary red clay with a thickness of more than 4m， CFG pile composite foundation shall be used; for the ultra-high retaining wall with a height of 18m， the third-order graded and prefabricated module design is adopted， and geogrids with different tensile strength are adopted according to the retaining walls with different heights. The key points of quality control in the construction stage are briefly described.

Key Words： Reinforced soil retaining walls; Geogrid; Quality Control; Foundation bearing capacity

加筋挡土墙，顾名思义，是在土体中加设拉筋，以增加土体间内部摩擦力从而保证土体稳定的复合结构，是挡土墙的一种结构形式，具有结构新颖、造价相对较低、施工简便、适应性强等特点^[1]。一般来说，加筋挡土墙由填料、土工格栅、挡墙砌块三部分组成，根据项目要求及实际情况选取相应等级的材料。超高及特高加筋挡土墙一般应采取分级设计，张飞、贾世林等人^[2]对台阶加筋挡土墙所需加筋力进行了研究，得出了加筋高挡墙稳定所需的加筋力随着台阶宽度和个数的增加而显著减少的结论。张俊腾、杨祁、陈福全等人^[3]对加筋挡土墙的极限高度影响因素进行了研究，得出了墙厚及地基土承载力与挡土墙高度正相关，而地下水位高度与挡土墙高度负相关的结论。徐良杰^[4]对土工格栅侧限蠕变特性进行了研究，其结论对工程实际质量控制具有指导意义。……