研究结论:一些抗滑桩在同一深度存在砂浆是抗滑桩分二次混凝土灌注引起，对于同一抗滑桩混凝土灌 注应一次性施工完毕;同时混凝土灌注要连续,且分层不超过1m用振动棒分层振实,并重视护壁施工质量和严格控制混凝土坍落度在180 mm，确保桩底无沉渣,护壁不漏水;若必须实施二次混凝土灌注，则应进行二次桩身完整性检测,确保第一次混凝土灌注抗滑桩顶无砂浆;对于挖方路基应先施工抗滑桩后开挖路基，同一排抗滑桩施工需要采取间隔施工，待第一批间隔抗滑桩的混凝土灌注时间达28 d后，再施工第二批间隔抗滑桩。

Research conclusions: The analysis showed that the mortar existing in this area was caused by casting the concrete to the pile by two times. The concrete could be casted to the one pile by one time. At the same time，the casting of concrete to the pile could be continuous and the stratification of more than Im could be avoided. The vibration rods would be used for the hierarchical compaction. Additionally, more attention would be paid to the construction quality of the remaining wall and the concrete slump would be controlled at 180 mm. It would make sure that there was no sediment on the pile bottom and there was no water leakage of the remaining wall. If it was necessary to cast the concrete for the second time, the second integrity test to the pile would be done to ensure that there was no mortar on the pile top casted by the first time. For the cutting subgrade, the anti-slide piles would be completed before excavation of the subgrade. For the same row of the pile, the interval construction was needed. In the process of the construction, the second batch of the interval piles could not be casted until the 28 days later after the first batch of the piles were casted.