涛源金沙江大桥重力锚碇岩基原位试验研究  

In-situ Test Study on Gravity Anchor Batholith of Taoyuan Jinsha River Bridge

作　　者：宋罡[1] 汤华[1] 袁从华[1] 邓琴[1] 钟明文 SONG Gang;TANG Hua;YUAN Cong-hua;DENG Qin;ZHONG Ming-wen(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rockand Soil Mechanics, Chinese Academy of Sciences,Wuhan430071,China;Yunnan Dayong Expressway Co,Ltd,Dali 671000,China)

机构地区：[1]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 [2]云南大永高速公路有限公司,大理671000

出　　处：《建材世界》2019年第2期23-26,共4页The World of Building Materials

基　　金：云南省交通科技项目[云交科教(2016)140(A)]

摘　　要：在建大永二期涛源金沙江大桥属华丽高速公路大理连接线(丽江段)。桥位区域地质条件极其复杂,位于程海-宾川活动断裂带,曾发生过多次地震活动。需要通过现场原位试验分析锚碇基底的承载性能和摩擦特性,以此验算锚碇的变形和抗稳定性。试验结果表明,锚碇基坑各地层的载荷承载力基本值都远大于勘察设计值,各地层的剪切摩擦系数及粘聚力也都大于或等于勘察设计值,均满足设计要求。Taoyuan Jinsha River Bridge of Dayong Phase II under construction belongs to Dali connecting line of Huali expressway (Lijiang section).Located in the Chenghai-Binchuan active fault zone,geological conditions there are extremely complex,and there have been many seismic activities.It is necessary to analyze the bearing capacity and friction characteristics of anchorage base through in-situ test in order to check the deformation and anti- stability of anchorage.The test results show that the basic value of load carrying capacity of each layer of anchorage foundation pit is far greater than the survey and design value,and the shear friction coefficient and cohesive force of each layer are greater than or equal to the survey and design value,which meet the design requirements.

关 键 词：涛源金沙江悬索桥 重力锚碇 岩基 直剪摩擦 抗剪断 载荷承载力 原位试验 

分 类 号：U442.2[建筑科学—桥梁与隧道工程]