土工基础

›› 2014, Vol. 28 ›› Issue (1): 30-33.

• 工程实录 • 上一篇    下一篇

土工格栅加筋碎石土在神农架机场高陡边坡的应用

邢晓毅1，朱长歧2，罗红兵3,阎 钶2   

  1. （1.中国石油天然气华东勘察设计研究院岩土工程处，山东 青岛 266000；2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071;3.中机三勘岩土工程有限公司，武汉 430030）
  • 收稿日期:2013-10-22 出版日期:2014-02-20 发布日期:2014-02-27
  • 作者简介:邢晓毅（1987-），助理工程师，硕士，研究方向为岩土工程勘察、地基加固的设计、监测及施工。

Application of Reinforced Soil Slope for a High Fill Slope for the Shennongjia Airport

XING Xiaoyi1, ZHU Changqi2, LUO Hongbing3， YAN Ke2   

  1. （1.Geotechnical Branchs of East China Investigation,Design&Research Institute of CNPC ，Qingdao， 2660002.State Key Laboratory of Rock and Soil Mechanics and Engineering, Wuhan Institute of Rock and Soil Mechanics, Wuhan, 430071；3.The third Academy of Survey,Ministry of Mechanical Industry，Wuhan， 430030）
  • Received:2013-10-22 Online:2014-02-20 Published:2014-02-27

摘要： 以神农架机场一处边坡工程为例，开展边坡的原位监测，获得了格栅加筋高陡边坡体内部的土压力、坡体内部位移、坡体表面位移及加筋格栅变形的分布规律。监测结果发现，最大竖向土压力值不是出现在最底部，随着远离挡墙而向下部迁移；坡体内部水平位移沿高度上呈非线性变化，呈现多个极值，最大值出现在距离坡顶22 m高度处，位移值仅为20 mm；而边坡的整体位移规律呈渐进发展的“鼓胀”式，底部位移最小，中部位移最大；坡体内部加筋格栅变形的量级为mm，最大变形值发生在挡墙1/2高度处，变形量2.32 mm，应变仅为6.65%，说明格栅的潜力还未得到充分的发挥。

关键词: 高陡边坡, 土工格栅, 原位监测, 神农架机场

Abstract: The performance of geogrid in the high reinforced soil slope (RSS) is a very important and practical topic in the geotechnical engineering. This paper presents a case history of a 65 m high RSS slope with a slope angle of  degree. The earth pressures, deflections inside the slope and the surface movement of the slope as well as the strain in the grogrid are monitored during the construction. The results show that, the maximum vertical earth pressure is not located at the bottom of the fills. With the location that far away from the slope surface, the maximum vertical earth pressures are gradually moving downward. The lateral deflection of the slope are not linear with a maximum lateral deflection of 20 mm is recorded at 22 m below the crest. Deformations at the top as well as the bottom of the RSS are small. The maximum strain within the geogrid is at the half height of the retaining wall at bottom with a magnitude of 2.32 mm or 6.65% of strain. This indicates that the maximum tension stress has not been reached.

Key words: reinforced soil slopes, geogrid, construction monitoring, shennongjia airport