基于TJS工法的盾构隧道运营变形控制

doi:10.3785/j.issn.1008-973X.2024.07.012

浙江大学学报(工学版)

2024, Vol. 58

Issue (7): 1427-1435 DOI: 10.3785/j.issn.1008-973X.2024.07.012

交通工程、土木工程

基于TJS工法的盾构隧道运营变形控制

周思剑1,2(

),张迪3,周建1,2,*(

),李瑛4,龚晓南1,2

1. 浙江大学滨海和城市岩土工程研究中心，浙江杭州 310058
2. 浙江大学城市地下空间开发工程技术研究中心，浙江杭州 310058
3. 中铁第四勘察设计院集团有限公司，湖北武汉 430063
4. 浙江省建筑设计研究院，浙江杭州 310006

Deformation control of shield tunnel operation based on tunnel jet system method

Sijian ZHOU1,2(

),Di ZHANG3,Jian ZHOU1,2,*(

),Ying LI4,Xiaonan GONG1,2

1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
2. Engineering Research Center of Urban Underground Development, Zhejiang University, Hangzhou 310058, China
3. China Railway Siyuan Survey and Design Group Limited Company, Wuhan 430063, China
4. Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China

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摘要：

开展隧道洞内全方位微扰动高压喷射注浆（TJS）工法对运营隧道变形控制的研究. 基于典型区间运营隧道实测数据，采用Plaxis 3D有限元数值模拟软件分析TJS工法横断面布置中桩长、打设角度、桩径对隧道加固效果的影响，通过在隧道底部打设局部垫层的方法优化TJS工法. 结果表明，桩长越长、角度越接近40°、桩径越大，对隧道沉降的控制效果越明显. TJS工法加固后的隧道地表沉降减少16.38 mm，水平收敛变形为未加固时的42.87%. 局部垫层能够显著提升TJS桩的加固效果，“两侧短中间长”的布置能够兼顾加固效果和降低施工成本.

关键词： TJS工法; 洞内加固; 盾构隧道; 运营变形控制; 数值模拟

Abstract:

A study was carried out on the deformation control of operational tunnels using the tunnel jet system (TJS) method. Based on measured data from a typical operating tunnel section, a finite element numerical simulation software Plaxis 3D was used to analyze the influence of pile length, pile angle and pile diameter on the tunnel reinforcement effect in the cross-section arrangement of the TJS method. A method for optimizing the TJS method was proposed by placing a partial cushion layer at the bottom of the tunnel. Results showed that a longer pile length, an angle closer to 40 degrees, and a larger pile diameter led to a more pronounced ability to control tunnel settlement. The ground settlement of the tunnel reinforced by the TJS method was reduced by 16.38 mm, and the horizontal convergence deformation was 42.87% of that of the unreinforced tunnel. A partial cushion layer greatly enhanced the reinforcement effect of TJS piles, the layout of “short on both sides and long in the middle” reduced construction costs while taking into account the reinforcement effect.

Key words: tunnel jet system method in-tunnel reinforcement shield tunnel deformation control of operation period numerical simulation

收稿日期: 2023-06-16 出版日期: 2024-07-01

CLC:

TU 74

基金资助: 国家自然科学基金资助项目（51778575）；铁四院横向课题资助项目（2022K119-W01）.

通讯作者: 周建 E-mail: 22112172@zju.edu.cn;zjelim@zju.edu.cn

作者简介: 周思剑（1999—），男，硕士生，从事隧道工程研究工作. orcid.org/0009-0006-8801-386X. E-mail：22112172@zju.edu.cn

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引用本文:

周思剑,张迪,周建,李瑛,龚晓南. 基于TJS工法的盾构隧道运营变形控制[J]. 浙江大学学报(工学版), 2024, 58(7): 1427-1435.

Sijian ZHOU,Di ZHANG,Jian ZHOU,Ying LI,Xiaonan GONG. Deformation control of shield tunnel operation based on tunnel jet system method. Journal of ZheJiang University (Engineering Science), 2024, 58(7): 1427-1435.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2024.07.012 或 https://www.zjujournals.com/eng/CN/Y2024/V58/I7/1427

图 1 TJS工法

表 1 模型结构计算参数

表 2 土体计算参数

图 2 典型工况的土层剖面图

图 3 典型工况的网格划分图

图 4 典型工况的模拟数据验证

表 3 桩体布置分组

图 5 桩长对加固效果的影响

图 6 打设角度对加固效果的影响

图 7 桩径对加固效果的影响

图 8 地表沉降加固效果

图 9 衬砌水平变形云图

图 10 局部垫层优化TJS工法

图 11 优化TJS工法加固效果

图 12 优化TJS工法衬砌应力云图

表 4 TJS长短桩组合分组

图 13 优化TJS工法组合的沉降对比

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