洞室地基对拟建建筑地基承载力的影响分析

Analysis of Influence of Foundation with Caverns on Bearing Capacity of Building Foundation

龙桥农贸市场项目位于既有渝怀铁路龙桥隧道、渝涪铁路新龙桥隧道上方,如何确定洞室地基承载力、确保洞室地基稳定是该项目主要的岩土工程问题。本文依托该工程实例,判断隧道深浅埋,划分隧道塌落区范围,确定既有隧道对地上建筑地基承载力的影响程度,计算塌落区范围内洞室地基承载力,并通过Midas数值模拟验算洞室地基稳定性,为后续建筑结构的设计提供技术支撑,也为类似工程的洞室地基承载力计算提供有价值的参考。

How to determine the bearing capacity and ensure the stability of foundation with caverns is the main geotechnical problem of Longqiao agricultural market project, which is located above the existing tunnel of Yuhuai and Yufu railway. Based on this real project of foundation with caverns, this paper determines deep or shallow buried tunnel, divides collapse zones and calculates bearing capacity, determines the influence degree of the existing tunnel on bearing capacity of the building foundation, and checks stability of foundation with cavern by Midas numerical simulation. The conclusion of this paper provides technical support for subsequent structure design of the building and valuable reference for similar projects.