超大直径超深嵌岩旋挖分级成孔技术  

Graded hole forming technology of super-large diameter and super deep rock socketed pile by rotary drilling rig

作　　者：许谷星 孙言 Xu Guxing;Sun Yan(Jiangxi Geological Engineering Group Company,Nanchang 330029,China;Basic Geological Survey Institute of Jiangxi Geological Survey Institute,Nanchang 330025,China)

机构地区：[1]江西省地质工程(集团)公司,江西南昌330029 [2]江西省地质调查勘察院基础地质调查所,江西南昌330025

出　　处：《山西建筑》2022年第22期78-80,共3页Shanxi Architecture

摘　　要：针对钻孔灌注桩工程中,超大直径,孔深超过50 m,且存在较厚中微风化残留体的情况下,选择正确的施工技术方案对工程实施具有十分重要的意义。结合深圳上沙某工程的实际,从施工设备选型、钻头(具)选择、施工方案确定提供了思路,并对旋挖分级成孔技术的关键点进行详细的介绍。In bored cast-in-place pile engineering, it is of great significance to select the correct construction technology scheme under the conditions of super-large pile diameter, super deep pile depth of deeper than 50 m, and the existence of thick medium-breeze relicts. In this paper, based on the practice of a certain project in Shangsha, Shenzhen, the selection and determination of construction scheme and equipment, drill bit and tools, as well as the key points of graded hole forming technology by rotary drilling rig are introduced in detail.

关 键 词：超大直径 残留体 硬质岩 旋挖钻机 

分 类 号：TU753[建筑科学—建筑技术科学]