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分析半盖挖(部分加盖挖土)地铁基坑施工中,多道支撑梁用立柱桩支承对施工和投资带来的影响。提出了取消立柱桩的设计和施工方法,并通过对支撑梁的验算,对改进方法进行了论证。计算表明,只要对梁的设计方案略加调整,可以确保梁的使用安全可靠。对改进前后的两种方法进行了技术经济比较。结果表明,在一定的条件范围内,取消立柱桩的方法是安全可行的,且综合效益明显。
This paper analyzes the influence on the construction and investment in the construction of the foundation pit with semi-capped digging (partial capped earth digging) and the post support of the multi-legged supporting beam. Proposed to cancel the design and construction method of column piles, and through checking the support beam, the improvement method is demonstrated. Calculations show that as long as the beam design is slightly adjusted, the beam can be used safely and reliably. The two methods before and after the improvement of the technical and economic comparison. The results show that in a certain range of conditions, the method of removing column is safe and feasible, and the overall efficiency is obvious.