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金属矿山 ›› 2009, Vol. 39 ›› Issue (12): 46-49.

• 采矿工程 • 上一篇    下一篇

公路拓宽工程中复合地基处治技术应用分析

曾学敏1,何礼彪2   

  1. 1.中钢集团马鞍山矿山研究院有限公司;2.中南大学
  • 出版日期:2009-12-15 发布日期:2011-04-24

Application Analysis of Composite Foundation Treatment Technology in Highway Widening Project

Zeng Xuemin1,He Libiao2     

  1. 1.Sinosteel Maanshan Institute of Mining Research Co., Ltd.;2.Central South University
  • Online:2009-12-15 Published:2011-04-24

摘要: 结合某公路拓宽工程,采用了“变形协调与控制”的处治思想,分析了复合地基防止路基不均匀沉降的机理,提出了粉喷桩-土工格栅相结合的路堤拼接处治方案,并对其处治效果进行评价。动态监测结果显示路基横断面的差异沉降为0.2 mm,侧向位移为2 cm,符合规范要求。研究结果表明,复合地基处治后拓宽路基本身变形及新老路基差异变形量达到了路基拓宽的理想效果。  

关键词: 路基拓宽, 复合地基, 变形, 处治, 监测

Abstract: Based on a highway widening project, using a “coordination and control of distortion” treatment thinking, the mechanism of composite foundation to prevent differential settlement are analyzed and a combined subgrade treatment Program of powder injection pile and geo-grid was proposed. Then its treatment results were evaluated. Dynamic monitoring results show that the differential settlement of cross section is 0.2 mm, and lateral displacement is 2 cm, which is in line with regulatory requirements. The results show that the widened roadbed deformation after treatment of composite foundation and the deformation difference between the new and old can reach a desired effect.

Key words: Subgrade widening, Composite foundation, Deformation, Treatment, Monitoring