基于数值模拟的浅埋超大跨连拱隧道开挖工法优选  

The Excavation Method of Shallow Buried Super-large Span Arch Tunnel Based on Numerical Simulation

作　　者：王浩 唐张 余外宾 傅鹤林[4] 易海东 Wang Hao;Tang Zhang;Yu Waibin;Fu Helin;Yi Haidong(Minmetals 23 Metallurgical Construction Group Co.,Ltd.,Changsha 425399,China;Yueyang City Operation Investment Group Co.,Ltd.,Yueyang 414022,Hunan,China;Yueyang Traffic Highway Engineering Construction Co.,Ltd.,Yueyang 414022,Hunan,China;Central South University,Changsha 410075,China)

机构地区：[1]五矿二十三冶建设集团有限公司,长沙425399 [2]岳阳市城市运营投资集团有限公司,湖南岳阳414022 [3]岳阳市交通公路工程建设有限公司,湖南岳阳414022 [4]中南大学,长沙410075

出　　处：《科技通报》2025年第4期86-93,共8页Bulletin of Science and Technology

基　　金：湖南省教育厅重点课题(23A0014)。

摘　　要：以岳阳市畈中路一期赶山路至临湖路来米坡隧道为依托,基于地质勘察报告和施工组织设计,建立数值模型,从拱顶沉降、水平收敛和地表沉降3个方面对比双侧壁导坑法和单侧壁导坑法的施工效果,从安全和经济的角度优选出合适的施工方案。研究结果表明:双侧壁导坑法施工,核心土能有效控制隧道竖向变形,拱顶位移和地表沉降均主要发生在核心土施工阶段,水平位移主要发生在外导坑施工阶段;采用单侧壁导坑法施工也满足隧道施工阶段变形控制要求,能充分发挥支护结构承载能力;2种施工方法均满足施工阶段变形控制要求,来米坡隧道采用单侧壁导坑法施工在工期和成本上具有明显优势。Based on the geological survey report and construction organization design,a numerical model is established to compare the construction effects of double-wall diversion method and single-wall diversion method from three aspects:arch settlement,horizontal convergence and surface settlement,and a suitable construction scheme is given priority from the perspective of safety and economy.The results show that:In the construction of double-sidewall guide pit,the core soil can effectively control the vertical deformation of the tunnel,and the displacement of the vault and the surface settlement mainly occur in the core soil construction stage,and the horizontal displacement mainly occurs in the construction stage of the outer guide pit;The single-side wall guide pit method is used to construct and meet the deformation control requirements of the tunnel construction stage,and the bearing capacity of the supporting structure can be fully exerted;The two construction methods meet the requirements of deformation control in the construction stage,and the single-sidewall guide pit method is used for the construction of the Laimipo tunnel,which has obvious advantages in terms of construction period and cost.

关 键 词：连拱隧道 数值模拟 围岩扰动 双侧壁导坑法 单侧壁导坑法 

分 类 号：U45[建筑科学—桥梁与隧道工程]