设计、施工、监测

超深异型排插式刚性接头地连墙工艺试验研究

  • 夏欢 ,
  • 曾旭涛 ,
  • 付金磊 ,
  • 朱俊涛 ,
  • 屈成
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  • 1.中交第二航务工程局有限公司,武汉 430014;
    2.中交二航局第四工程有限公司,安徽 芜湖 241001;
    3.长大桥梁建设施工技术交通行业重点实验室,武汉 430014
夏欢(1989—),男,湖南武冈人,硕士生,高级工程师,主要从事大跨桥梁施工技术管理方面的研究。E-mail:724882647@qq.com

收稿日期: 2024-03-04

  网络出版日期: 2025-01-03

基金资助

2022年度交通运输行业重点科技项目(2022-ZD4-060)

Test Research of Ultra Deep Special-Shaped Diaphragm Wall with Rigid Joint of Row Inserted Mesh Reinforcement

  • Xia Huan ,
  • Zeng Xutao ,
  • Fu Jinlei ,
  • Zhu Juntao ,
  • Qu Cheng
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  • 1. CCCC Second Harbour Engineering Co., Ltd., Wuhan 430014, P. R. China;
    2. The 4th Engineering Company, CCCC Second Harbor Engineering Co., Ltd., Wuhu, Anhui 241001, P. R. China;
    3. Key Laboratory of Construction Technology of Long Span Bridges, Transportation Industry, Wuhan 430014, P. R. China

Received date: 2024-03-04

  Online published: 2025-01-03

摘要

以张靖皋长江大桥南锚碇基础现场工艺试验为依托,对超深异型排插式网片刚性接头地连墙施工过程中的关键工艺进行了创新及验证,结果表明:在采用双轮铣及液压抓斗联合施工工艺的基础上,通过合理设置施工顺序、引入基于复合检测手段的槽段虚拟碰撞检测技术和加长型孔口导向架以及加强泥浆性能管控等控制措施,可以确保超深异型槽段的成槽垂直度和槽壁稳定性;应用倾角仪和三维液压千斤顶调整刚性接头姿态,通过导向装置辅助入槽,实现了刚性接头安装过程中精度的可测可控,利用智能化同步焊接技术可有效控制焊接变形,优化焊接质量;在钢筋笼匹配制作的基础上,辅以垂直度监测手段可有效控制刚性接头和钢筋笼的相对位置关系;采用专用的刷壁装置清理排插钢筋处的泥渣,并使用同步浇筑平台实现刚性接头各隔舱的同步浇筑,有利于保证浇筑质量以及接头的结构安全控制,同时,引入防绕流水带封堵混凝土绕流通道,可以有效避免混凝土污染接头处的钢筋,确保地连墙墙体的强度和完整性。后期的开挖及抗弯承载力试验验证了本文所提出的地连墙施工控制措施可有效保证地连墙的成墙质量以及接头处承载力。

本文引用格式

夏欢 , 曾旭涛 , 付金磊 , 朱俊涛 , 屈成 . 超深异型排插式刚性接头地连墙工艺试验研究[J]. 地下空间与工程学报, 2024 , 20(6) : 2020 -2033 . DOI: 10.20174/j.JUSE.2024.06.28

Abstract

Based on the field process test of the south anchorage foundation of Zhangjinggao Yangtze River Bridge, the key technology in the construction of ultra deep special-shaped grid joint diaphragm wall was innovated and verified. The results show that: The combined construction process of trench cutter and hydraulic grab can ensure the verticality of the ultrasonic irregular groove section and the stability of the groove wall by reasonable setting construction sequence, introducing virtual collision detection technology for slot segments based on composite detection methods and extended guide frame and strengthening mud performance control and other control measures, the verticality and stability of ultra deep special-shaped panel trench can be ensured. The inclinometer and three-dimensional hydraulic jack are used to adjust the posture of the rigid joint, and the guide device is used to assist the rigid joint to enter the trench, so that the precision can be measured and controlled during the installation of the rigid joint. Intelligent synchronous welding technology can effectively control welding deformation and optimize welding quality. The relative position relationship between rigid joints and reinforcement cages can be effectively controlled on the basis of matching fabrication of reinforcement cages, supplemented by verticality monitoring means. The special wall brushing device is used to clean up the sludge at the row inserted reinforcement, and the synchronous pouring platform is used to realize the synchronous pouring of each compartment of the rigid joint, which is conducive to the improvement of the pouring quality and the structural safety control of the joint. The concrete bypass channel can be blocked with anti flowing water tape, which can effectively prevent the concrete from polluting the rebar at the joint and ensure the strength and integrity of the diaphragm wall. Later excavation tests have verified that the construction control measures proposed in this article can effectively ensure the quality of the diaphragm wall and the bearing capacity of the joints.

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