桩基塌孔区混凝土回灌护壁法施工研究及应用

RESEARCH AND APPLICATION OF CONSTRUCTION TECHNOLOGY OF CONCRETE REFILLING WALL PROTECTION METHOD IN COLLAPSED AREA OF PILE FOUNDATION

针对复杂地质条件下桩基施工易出现扩孔、超方、沉渣层过厚以及桩孔坍塌等问题,综合了多种桩基成孔施工工艺的优点,研究了深丘地区泥浆护壁法+混凝土回灌法组合施工工艺,并将其成功应用于四川白酒学院(二期)工程浅丘–沟谷区域的桩基施工。工程桩基施工结果表明,该施工工艺的实施取得了良好的经济效益,同时具有一定的社会效益。

Aiming at solving the problems of pile foundation construction prone to expansion,oversquareness,thick sediment layer and pile hole collapse under complex geological conditions,by combining the advantages of various pile foundation hole construction techniques,construction technology which combines concrete refilling and wall protection with mud method in deep hilly areas was studied,and was successfully applied to the pile foundation construction in the deep hill-gully area of the Sichuan Baijiu University(Phase II)project.The construction results of the engineering pile foundation suggest that the implementation of the construction technology has achieved good economic and social benefits.