基于Peck公式的双线隧道地面沉降模型及参数研究
师刚1,2袁浩旭3张澄玄1宋建学3
Study on Ground Settlement Model and Parameters of Twin-line Tunnel Based on Peck Formula
SHI GangYUAN HaoxuZHANG ChengxuanSONG Jianxue
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作者信息:1.上海同岩土木工程科技股份有限公司，200092，上海
2.上海地下基础设施安全检测与养护装备工程技术研究中心，200092，上海
3.郑州大学土木工程学院，450003，郑州
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Affiliation:Shanghai Tongyan Civil Engineering Science and Technology Co., Ltd., 200092, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.01.030
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中图分类号/CLCN:U231+.3
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栏目/Col:研究报告
摘要:
双线平行盾构施工中，引起地面沉降的因素有很多，主要包括两隧道间距、隧道埋深、隧道直径、土质条件、施工方案和施工水平等。依托处于郑州地区典型地质单元的双线隧道盾构施工地表沉降监测数据，在Peck公式的基础上，建立起地表沉降分布函数关系；通过对实测数据进行拟合分析，得出沉降槽宽度系数和土体损失率等参数的数值。研究发现：在隧道间距一定的情况下，埋深较小时，地面沉降曲线呈双峰W型，此时可用修正过的二维Peck公式进行拟合；当隧道埋深较大时，地面沉降曲线呈V型，用经典Peck公式进行拟合即可满足工程精度要求。
Abstracts:
In the construction of twin-line parallel shield tunnel, many factors are causing surface settlement, such as the distance between two tunnels, tunnel depth, tunnel diameter, geological condition, construction procedure and level. On the basis of ground settlement monitoring data of twin-line shield excavation of typical geological units in Zhengzhou and Peck formula, ground settlement distribution function relationship is established. Through fitting analysis of field data, values of parameters including width of settlement trough and soil loss rate are obtained. Study founds that, under the condition of fixed distance between tunnels, ground settlement curve demonstrates W shape when the tunnel depth is relatively shallow, which can be fitted by using the revised 2D Peck formula; when the tunnel is relatively deeper, ground settlement curve demonstrates V shape, which can be fitted by using classic Peck formula to meet the engineering accuracy requirement.
引文 / Ref:
师刚,袁浩旭,张澄玄,等.基于Peck公式的双线隧道地面沉降模型及参数研究[J].城市轨道交通研究，2022，25（1）：161.
SHI Gang,YUAN Haoxu,ZHANG Chengxuan,et al.Study on Ground Settlement Model and Parameters of Twin-line Tunnel Based on Peck Formula[J].Urban mass transit，2022，25（1）：161.
SHI Gang,YUAN Haoxu,ZHANG Chengxuan,et al.Study on Ground Settlement Model and Parameters of Twin-line Tunnel Based on Peck Formula[J].Urban mass transit，2022，25（1）：161.
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