Steel sleeve wall protecting device and construction method of cast-in-place pile in sandy gravel rock area

• Main Authors: LIU CHUNMEI, LI XIAN, QIAN YELIN, JIANG NAN, ZHANG HUI, YUAN HAIPING, ZHONG JIAN, SU YING, ZUO XIAOHAN, WANG YIXIAN
• Format: Patent
• Language: Chinese; English
• Published: 24.12.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention relates to the field of karst area pile foundation construction, in particular to a steel sleeve wall protecting device and a construction method of a cast-in-place pile in a sandy gravel rock area. The steel sleeve wall protecting device comprises an outer sleeve mechanism, an inner sleeve mechanism, an inner sleeve connector and an outer sleeve connector, the outer sleeve mechanism comprises more than two sections of outer steel sleeves which are fixedly connected in sequence, and the inner sleeve mechanism comprises more than two sections of inner steel sleeves which are fixedly connected in sequence; axial long-strip-shaped plates are evenly distributed on the outer wall of each section of inner steel sleeve, axial long grooves are evenly distributed in the inner wall of each section of outer steel sleeve, the long-strip-shaped plates are arranged in the long grooves in a sliding fit mode, so that the inner sleeve mechanism coaxially slides in an outer steel sleeve mechanism; holes are unifo