渝怀铁路路基抗滑桩裂缝成因分析及整治措施

Study on Causes of Cracks on Anti-slide Piles for Subgrade of Chongqing-Huaihua Railway

渝怀铁路K562+739^+805路基左侧分布12根抗滑桩,其中10根抗滑桩桩身出现不同宽度及深度的裂缝。经现场调查并采用低应变反射波法、地质雷达法对桩身裂缝及桩体完整性检测分析,裂缝原因主要是由于抗滑桩外挂式挡土板与桩体连接不牢固,导致桩体的锁口参与受力,锁口部位受力过大所致,应采用在每个抗滑桩中对应各自每块挡板位置补打锚索的处理措施。

There are 12 anti-slide piles distributed along the left side of subgrade for K562＋739～＋805 section of Chongqing-Huaihua Railway, wherein the 10 piles have cracks in different width and depth on the body. By means of field investigation, low-strain reflection wave and GPR, these cracks were detected and the pile integrity analyzed. It was found that the outboard retaining plate and the pile have so insecure connection that the pile lock is under stress to a great extent; and this was the reason. The treatment measure was to add anchor cable at the position of each retaining plate for every pile.