基于Loganathan &amp; Poulos、Clough修正公式的浅埋超大直径盾构隧道地面沉降预测

张继超, 曾垂刚, 崔乐健, 杨振兴, 孙飞祥, 翟乾智

doi:10.3973/j.issn.2096-4498.2022.S1.032

隧道建设 >

2022 , Vol. 42 >Issue S1: 274 - 280

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.S1.032

研究与探索

基于Loganathan & Poulos、Clough修正公式的浅埋超大直径盾构隧道地面沉降预测

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（1. 盾构及掘进技术国家重点实验室, 河南郑州 450001； 2. 中铁隧道局集团有限公司, 广东广州 510000; 3. 中铁隧道股份有限公司，河南郑州 453000 ）

张继超（1993—），男，河南商丘人，2019年毕业于中国地质大学（武汉），地质工程专业，硕士，工程师，主要从事隧道与地下工程领域科研工作。 Email: 2321089229@qq.com。

网络出版日期: 2022-08-23

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Ground Settlement Prediction of ShallowBuried SuperLargeDiameter Shield Tunnel Based on Loganathan & Poulos and Clough Modified Formulas

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(1. State Key Laboratory of Shield Machine and Boring Technology, Zhengzhou 450001, Henan, China;
2. China Railway Tunnel Group Co., Ltd., Guangzhou 510000, Guangdong, China; 3. China Railway Tunnel Stock Co., Ltd., Zhengzhou 453000, Henan, China)

Online published: 2022-08-23

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摘要

为解决浅埋大直径隧道开挖沉降预测受到开挖隆起效应影响的问题，采用有限元数值模拟手段计算，结果表明开挖隆起效应使得地表沉降量明显偏小。基于现场地表的沉降监测结果数据，引入Clough修正公式计算沉降槽宽度系数i，对Loganathan & Puolos公式、Celestino公式进行修正和非线性拟合分析，得出结论：地层损失率Vl未知，修正Loganathan & Puolos公式拟合度最高，Celestino公式根据地层损失率Vl预测地面沉降拟合度最高。联合公式绘制完整的沉降预测曲线与现场监测数据曲线相关性达到85%，趋势基本一致，说明沉降预测理论的预测结果具有较好的预测准确度。

关键词： 浅埋超大直径盾构隧道; Loganathan &; Puolos、Celestino公式修正; 非线性拟合; 沉降预测

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张继超, 曾垂刚, 崔乐健, 杨振兴, 孙飞祥, 翟乾智 .

基于Loganathan & Poulos、Clough修正公式的浅埋超大直径盾构隧道地面沉降预测

[J]. 隧道建设, 2022 , 42(S1) : 274 -280 . DOI: 10.3973/j.issn.2096-4498.2022.S1.032

Abstract

To investigate the impact of the excavation uplift effect on the settlement prediction of shallowburied largediameter tunnels, finite element numerical simulation method is used to conduct calculations. The results show that the excavation uplift effect results in the ground settlement is significantly smaller. Based on the settlement monitoring data of the onsite ground surface, the Clough modified formula is introduced to calculate the width coefficient 〖WT５《TNR#I》〗i〖WT５《TNR》〗 of the settlement trough. The Loganathan & Puolos and Celestino formulas are modified and nonlinear fitting analysis is carried out. It is concluded that the formation loss rate 〖WT５《TNR#I》〗V〖WT《TNR》〗l is unknown, and the fitting degree of the modified Loganathan & Puolos formula is the highest, and the fitting degree of the Celestino formulas is the highest for land subsidence based on the formation loss rate 〖WT５《TNR#I》〗V〖WT《TNR》〗l. The correlation between the complete settlement prediction curve drawn by the combined formula and the onsite monitoring data curve reaches 85%, and the trend is basically the same, indicating that the prediction method has a good prediction accuracy.

Key words： shallowburied superlargediameter shield tunnel; Loganathan &; Puolos and Celestino formula modification; nonlinear fitting; settlement prediction

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