（1 湖南中大建设工程检测技术有限公司, 长沙 410205； 2 湖南大学土木工程学院，  长沙 410012； 3 湖南中加土木工程加固技术有限公司,  长沙 410205）

［摘要］某城市防洪土建工程衡重式挡土墙上墙身与衡台连接处出现裂缝，通过现场检测以及FLAC3D有限差分软件建模计算，分析了墙身开裂的主要原因，为确保其安全性提出了加固措施。结果表明：1) 挡土墙上墙身与衡台连接处存在拉应力区，当墙后土侧压力过大或者墙身结构强度不足时，墙身易产生开裂，进而影响挡土墙整体的稳定性。设计时，应考虑在上墙身与衡台连接处增设混凝土加强体。2) 挡土墙基础前端下设单排抗滑桩的结构形式不合理，会加大挡墙基础两端的不均匀沉降，增加挡土墙上墙身与衡台连接处的拉应力。3) 施工时，应确保浆砌石墙体内部的密实度和饱满度，保证浆砌石的抗拉和抗剪强度，并保持墙体排水系统的疏通。4) 对病害墙体的加固以加强墙体的整体性能为主，局部强度不足的部位应采取补强措施。

［关键词］衡重式挡土墙； 病害； 检测； 加固

中图分类号：TU399文献标识码：A文章编号：1002-848X(2017)23-0103-06

Damage analysis and reinforcement of balance weight retaining wall for a city flood control and civil engineering

Li Gang1, Tan Zhongkun1,2,3, Yi Xin1, Wang Youlin1, Liang Bo1

(1 Hunan Zhongda Construction Engineering Testing Technology Co., Ltd., Changsha 410205, China; 2 School of Civil Engineering, Hunan University, Changsha 410012, China; 3 Hunan Zhongjia Civil Engineering Strengthening Technology Co., Ltd., Changsha 410205, China)

Abstract:Some cracks had appeared at the joints between upper wall and weight desk in a balance retaining wall for a city flood control and civil engineering. The main reasons of the cracks were analyzed through testing on the spot and finite element model simulation by finite difference software of FLAC. Some reinforcement measures were put forward to ensure the security of the wall. Conclusions are summarized as follows. 1) There is a tensile stress zone at the joints between upper wall and weight desk, to generate the cracks in the wall if lateral earth pressure behind the wall has exceeded the bearing capacity of wall. This influences stability of overall retaining wall. Consequently,  concrete reinforcement should be applied at the connecting part. 2) It is unreasonable to install anti-slide pile in a single row at the front of retaining wall foundation, to increase the uneven foundation settlement at ends of retaining wall foundation and increase tensile stress at the joints between upper wall and weight desk. 3) In construction, the compactness and plumpness inside the masonry wall shall be ensured to make sure the tensile and shear resistance of the masonry stone, and the dredging of the drainage system of the wall shall be maintained. 4) Overall stability of damaged wall should be strengthened emphatically, and parts with lack of strength should be reinforced.

Keywords:balance weight retaining wall; damage; testing; reinforcement

作者简介：李刚，硕士，工程师，Email：303857385@qq.com。