冲洪积-海积阶地基坑支护方案实例分析

冲洪积-海积阶地的基坑属于淤泥质基坑。结合一个住宅工程淤泥质基坑支护案例,介绍了排桩支护方案和放坡喷锚支护方案。排桩支护方案安全可靠,但造价较高;放坡喷锚方案要求周边场地较开阔、基坑开挖深度较浅,同时场地岩土特性和水文条件较有利。根据该基坑工程的开挖深度、周边环境以及特定的淤泥质场地的岩土特征和水文条件选择了放坡喷锚方案。介绍了放坡喷锚施工过程的注意事项如分段开挖、及时硬化和排水、水位和位移观测等。该放坡喷锚方案确保了该工程基坑开挖的顺利进行,也取得了良好的经济效果。

An Analysis of suppororting methods of ditch in alluvial-marine terrace

The ditch in alluvial-marine terrace is of sludge ditch.The study introduces the piles supporting scheme and the slope spraying anchor supporting scheme of the residential engineering.The piles supporting scheme is safe and reliable,but the high cost;The slope spraying anchor supporting scheme requires that the surrounding is wide,and the excavation depth is shallow,and rock and soil characteristics and hydrological characteristics is more advantageous.The slope spraying anchor supporting method is selected according to excavation depth,surrounding environment,rock and soil characteristics and hydrological characteristics of sludge foundation in this ditch engineering.The study introduces that the slope spraying anchor construction need attention such as segmentation excavation,timely hardening and drainage,water level and displacement observation.The slope spraying anchor supporting scheme ensures that the excavation is carried out smoothly and achieves a good economic effect.