摘要
兰州新区位于湿陷性黄土区域,拟建建筑物场地属典型的黄土堆积和侵蚀作用形成的黄土丘陵、梁峁地貌,原地貌已破坏,现为人工回填整平场地,回填土层最大厚度约为28.00 m,黄土状粉土层底埋深最大约为38.70 m。黄土状粉土具有很严重的湿陷性,湿陷等级为Ⅳ级。通过某疾控中心综合楼工程案例,阐述了湿陷性黄土地区超厚回填土内超长钻孔灌注桩施工过程中的施工控制技术要点,为湿陷性黄土地区超长桩基施工提供借鉴经验。
Lanzhou New District is located in the collapsible loess area. The site of the proposed building belongs to the typical loess hilly and ridge landform formed by loess accumulation and erosion. The original landform has been destroyed, and now it is a site for artificial backfilling and leveling. The maximum thickness of the backfilled soil layer is about 28.00 m, and the buried depth of the bottom of the loesslike silty soil layer is about 38.70 m loess-shaped silt has serious collapsibility, and the collapsibility grade is grade Ⅳ.Through the project case of a comprehensive building of CDC, this study expounds the key points of construction control technology in the construction process of super-long bored pile in super-thick backfill soil in collapsible loess area, and provides reference experience for super-long pile foundation construction in collapsible loess area.
作者
连明
LIAN Ming(Gansu Sixth Construction Group Co.,Ltd.,Lanzhou 730000,China)
出处
《河南科技》
2022年第16期67-70,共4页
Henan Science and Technology
关键词
湿陷性黄土
超厚填方区
超长桩
施工技术
collapsible loess
thick fill area
super-long pile
construction technology
