If the large diameter bored pile is adopted in foundation, the current leakproof system of municipal refuse landfill must be damaged, as a result, groundwater will be polluted by the leachate.

• 采用大直径钻孔灌注桩时,施工时会破坏现有垃圾填埋场的防渗体系,且渗滤液将对地下水造成一定程度的污染。