•  
  •  
 

Abstract

The calculation of the bearing capacity of traditional gravity anchor foundation instructed by Code for Design of Ground Base and Foundation of Highway Bridges and Culverts (JTG D 63—2007 ) only considers the friction effects of the basement and neglects the rock socketed effect of bottom plate,which is simply regarded as a safety margin,on the improvement of bearing capacity.To study the influence of rock socketed effect on the bearing capacity of gravity anchor,this paper designed two groups of indoor scale model tests on non-rock-socketed and rock-socketed gravity anchors with a scale of 1∶50 to discuss the bearing capacity and load distribution of different models under a combination of vertical loads and horizontal loads,finally obtaining the effectiveness of rock socketed effect.The test results show that the gravity anchor considering rock socketed effect exhibits smaller displacement under the same horizontal cable force,with the horizontal ultimate failure load increased by 16.7%.Moreover,after the bottom plate is embedded in the moderately weathered layer,higher resistance generated by the bonding between the rock layer and anchor can reduce the stress level of the bottom plate and transform the ultimate failure mode of the gravity anchor from “sliding friction failure mode ” to “overturning failure mode ”.The above results provide technical support for the design and construction of the gravity anchor foundation.

Publication Date

2-22-2025

DOI

10.14048/j.issn.1671-2579.2025.01.021

First Page

174

Last Page

180

Submission Date

March 2025

Reference

[1]夏才初,程鸿鑫,李荣强.广东虎门大桥东锚碇现场结构模型试验研究 [J].岩石力学与工程学报,1997,16(6):571-576.XIA Caichu,CHENG Hongxin,LI Rongqiang.Testing study on field structure model of the east anchorage of Guangdong Humen Bridge [J].Chinese Journal of Rock Mechanics and Engineering,1997,16(6):571-576.
[2]崖岗,韩冬冬,石海洋,等.虎门二桥坭洲水道桥重力式锚碇基础稳定性研究 [J].公路,2017,62(4):129-135.YA Gang,HAN Dongdong,SHI Haiyang,et al.Study on stability of gravity anchorage foundation of Nizhou Waterway Bridge of Humen Second Bridge [J].Highway,2017,62(4):129-135.
[3]李永盛.江阴长江公路大桥北锚碇模型试验研究 [J].同济大学学报 (自然科学版 ),1995,23(2):134-140.LI Yongsheng.Experimental study on north anchorage model of Jiangyin Yangtze River Highway Bridge [J].Journal of Tongji University (Natural Science ),1995,23(2):134-140.
[4]王超，周志兴.强透水砂卵石层重力式锚碇基坑支护方案研究 [J].中外公路，2022,42（1）：169-172.WANG Chao,ZHOU Zhixing.Study on supporting scheme for gravity anchoage foundation pit of in strong permeable sand pebble layer [J].Journal of China & Foreign Highway,2022，42(1):169-172.
[5]余美万,张奇华,高利萍,等.金东大桥隧道锚现场模型试验 及 承 载 能 力 分 析 [J].岩 土 工 程 学 报,2021,43(2):338-346.YU Meiwan,ZHANG Qihua,GAO Liping,et al.Field model tests and bearing capacity analysis of tunnel anchorage of Jindong Bridge [J].Chinese Journal of Geotechnical Engineering,2021,43(2):338-346.
[6]林荣安.悬索桥重力式锚碇系统受力分析及其优化 [D].西安:长安大学,2008.LIN Rong ’an.Analyzing and optimizing the bearing behaviors of gravity anchorage system for suspension bridge [D].Xi’an:Chang’an University,2008.
[7]段坚堤,王海林.双圆形超深基坑受力与变形特性研究[J].中外公路,2014,34(3):193-196.DUAN Jiandi,WANG Hailin.Study on stress and deformation characteristics of double circular ultra-deep foundation pit [J].Journal of China & Foreign Highway,2014,34(3):193-196.
[8]朱晓文,赵启林,朱凯,等.润扬大桥北锚碇基础三维数值仿真分析 [J].东南大学学报 (自然科学版 ),2005,35(2):293-297.ZHU Xiaowen,ZHAO Qilin,ZHU Kai,et al.3-D simulation analysis of Runyang Suspended Bridge ’s north anchorage[J].Journal of Southeast University (Natural Science Edition ),2005,35(2):293-297.
[9]邹恩杰,田斌,徐江,等.马普托大桥 Katembe 侧锚碇基底半成岩原位试验研究 [J].施工技术,2018,47(7):31-34.ZOU Enjie,TIAN Bin,XU Jiang,et al.In-situ test study on semi-diagenetic rock located anchorage foundation excavation of Maputo Bridge Katembe side [J].Construction Technology,2018,47(7):31-34.
[10]谭新,徐厚庆,彭伟.悬索桥重力式锚碇摩阻系数试验及取值方法 [J].地下空间与工程学报,2015,11(增刊 2):549-552,584.TAN Xin,XU Houqing,PENG Wei.The test and caiculating method for gravity anchorage ’s frictional coefficient of suspension bridge [J].Chinese Journal of Underground Space and Engineering,2015,11(sup 2):549-552,584.
[11]罗林阁,崔立川,石海洋,等.地连墙 -重力式复合锚碇基础承载性能试验研究 [J].岩土力学,2019,40(3):1049 -1058.LUO Linge,CUI Lichuan,SHI Haiyang,et al.Experimental study of bearing capacity of underground diaphragm wall-gravity anchorage composite foundation [J].Rock and Soil Mechanics,2019,40(3):1049 -1058.
[12]陈维,张海太,杨小兵.基于抗滑安全的悬索桥重力式锚碇优化 [J].中外公路,2019,39(2):120-124.CHEN Wei,ZHANG Haitai,YANG Xiaobing.Optimization of suspension bridge gravity anchor block based on anti-sliding safety [J].Journal of China & Foreign Highway,2019,39(2):120-124.
[13]李家平,张子新,黄宏伟,等.宁波庆丰大桥锚碇室内相似模型试验研究 [J].同济大学学报 (自然科学版 ),2005,33(8):1011 -1016.LI Jiaping,ZHANG Zixin,HUANG Hongwei,et al.Research on similarity model test of anchorage of Qingfeng Suspension Bridge in Ningbo [J].Journal of Tongji University (Natural Science ),2005,33(8):1011 -1016.
[14]李薇,杨华,尹小涛,等.基于模型试验的重力式锚碇极限承载性能研究 [J].公路交通科技,2021,38(6):97-103.LI Wei,YANG Hua,YIN Xiaotao,et al.Study on limit bearing feature of gravity anchorage based on model test[J].Journal of Highway and Transportation Research and Development,2021,38(6):97-103.

Download

Plum Print visual indicator of research metrics
PlumX Metrics
  • Usage
    • Downloads: 10
    • Abstract Views: 2
see details

Share

COinS