填方路基上跨越既有浅埋矩形隧道的理论分析

Theoretical analysis on crossing existing shallow buried rectangular tunnels on fill roadbed

随着城市地下空间开发的不断深入,地铁、地下商场、地下通道等地下建、构筑物的数量急剧增长,新建道路路基跨越既有地下建、构筑物的工程项目日益增多。以昆明滇池高原湖相软土地区某一新建道路路基跨越既有浅埋钢筋混凝土矩形隧道项目为研究背景,对新建道路工程跨越既有浅埋钢筋混凝土矩形隧道所造成的安全性影响进行分析,提出了一种基于理论计算的评价方法,重点分析了道路施工和运营引起的既有隧道结构内力及位移的变化规律,并给出了是否对既有隧道结构安全性造成影响的评价标准,可为类似的工程项目提供较高的参考价值。

With the continuous development of urban underground space,the number of underground structures and structures such as subways,underground shopping malls and underground passageways increases sharply,and the number of new road subgrade projects that span the existing underground structures and structures is increasing day by day.A new road subgrade crossing the existing shallow buried reinforced concrete rectangular tunnel in lacustrine soft soil area of Dianchi Plateau in Kunming is taken as the research background,the safety impact of new road engineering crossing the existing shallow buried reinforced concrete rectangular tunnel is analyzed,an evaluation method based on theoretical calculation is proposed,the internal force and displacement of the existing tunnel structure caused by road construction and operation are analyzed,and the evaluation criteria of whether the influence on the safety of the existing tunnel structure is given,can provide higher reference value for similar engineering projects.