BEARING PLATFORM EXCAVATION TECHNOLOGY OF SOUTH TOWER FOR YANGLUO RIVER BRIDGE

机译：阳逻河大桥南塔承台开挖技术。

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Bearing platform excavation is an important part of the bridge construction. Supported by Yangluo Yangtze River Highway Bridge Engineering, this paper introduced pile cap, cap structure, geological and hydrological conditions of South Tower. Through the analysis of Cone Penetration Tests (CPT), groundwater level and permeability coefficient of sub-clay, play-lock insert sheet pile cofferdam is compared to fenderless excavation technique, and based on comprehensive consideration of cost, time, risk and other factors, large excavation construction program is determined with the risk of the project and a detailed scheme accompanied with construction techniques is put forward. Furthermore, the methods and sequence of earth excavation pit are presented in this paper, and optimal control is dynamically operated during construction process besides orderly organization. Several construction problems are solved, the difficulties of bottom unearthed are solved through the ultra-dug excavation pit bottom technology, the high cost and low progress of original two slope spray anchor is solved by the way of direct placement of C20 concrete and mixed into the early strength agent .The successful excavation technology not only provided a guarantee to following Yangluo Bridge construction period of, but also provide a reference for other similar projects.

机译：支座平台开挖是桥梁建设的重要组成部分。在阳逻长江公路大桥工程的支持下，介绍了南塔的桩帽，帽盖结构，地质水文条件。通过对锥形渗透试验（CPT）的分析，子土的地下水位和渗透系数，将防锁嵌板桩围堰与无挡泥板开挖技术进行比较，并在综合考虑成本，时间，风险和其他因素的基础上，根据项目的风险确定大型的开挖施工方案，并提出详细的施工方案和施工技术。此外，本文还介绍了土方开挖坑的方法和顺序，除了有序组织外，还可以在施工过程中动态地进行最佳控制。解决了几个施工问题，通过超挖基坑技术解决了底土的难题，通过直接浇筑C20混凝土并掺入混凝土中的方法解决了原有的两个边坡喷锚的高成本和低进度。成功的开挖技术不仅为阳逻大桥的后续建设提供了保证，也为其他类似工程提供了参考。

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《International conference on transportation engineering;ICTE 2011》|2012年|p.1761-1766|共6页
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ZHU Guohua;
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中图分类交通运输经济;
关键词
bearing platform; sloped excavation; cone penetration test; construction optimization;

机译：轴承平台;斜坡开挖锥形渗透测试;施工优化;

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BEARING PLATFORM EXCAVATION TECHNOLOGY OF SOUTH TOWER FOR YANGLUO RIVER BRIDGE

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