摘要
结合深基坑工程支护设计,详细介绍了在深厚粉细砂层中放坡开挖的概念性设计,提出了在深厚粉细砂层中基于各种加固措施的放坡开挖的设计概念,加固措施包括在放坡中部和底部设置一定深度的水泥土搅拌桩、坡面插筋和喷射混凝土护坡,结果发现这些措施可以有效地提高基坑开挖时粉细砂层坡面的稳定性。同时指出可以利用连续分布的淤泥质粉质粘土层作为基坑的水平向封底,并提出对旋喷桩的工艺进行改进后,可以有效地提高止水帷幕的可靠性。实践证明,采用该方法可以有效地降低基坑造价,缩短工期,可供同类基坑设计时参考。
The concept design method is applied to excavation in deep silty-fine sand combining with retaining and protection design of a deep foundation pit. The concept design method in excavation is proposed based on several reinforcements. Those reinforcement measurements include setting jet grouting pile in the middle of slope or the slope toe, installing steel bar in the slope and injecting concrete in the surface of slope. It is found that the reinforcement measurements can effectively improve the stability of the slope surface. It is also described that the continuous distributed mucky-silty-clay can be used effectively as the horizontal bedding of the foundation pit to seal the bottom, and that improving by adding some bentonite the jet grouting pile technology can effectively improve the reliability of the curtain for cutting off water at the same time. It has been proved that the proposed method can decrease cost and time and provides reference to similar design.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A02期5438-5442,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩土工程
深厚粉细砂
深基坑
概念性设计
止水帷幕
geotechnical engineering
deep silty-fine sand
deep foundation pit
concept design
curtain forcutting off water
