【摘要】：研究目的:滬昆客專貴州西段沙坡特大橋4#~10#墩左側(cè)為高陡邊坡,屬典型的緩傾角順層邊坡,勘察階段定性為崩塌落石工點,施工中發(fā)現(xiàn)該工點的崩塌落石規(guī)模和工程危害遠(yuǎn)超過原先的認(rèn)識。本文基于無人機航拍技術(shù),通過綜合勘察和地質(zhì)分析,查明崩塌落石的成因和斜坡變形破壞模式,并制定出切實可行的工程措施。研究結(jié)論:(1)沙坡特大橋4#~10#墩左側(cè)為緩傾角順層高陡邊坡,崩塌落石之所以嚴(yán)重,系因滑移-壓致拉裂變形破壞;(2)該高陡邊坡的整治范圍,重點是距陡崖約35 m的貫通節(jié)理附近至崖壁間,按高度分段設(shè)防,采取清方、錨索(地梁)、噴錨網(wǎng)、主動防護網(wǎng)、錨索樁、防撞墻、截排水溝等措施進行綜合整治是適宜的;(3)線路傍山選線,應(yīng)遠(yuǎn)離高陡岸(邊)坡,對上硬下軟的緩傾角順層高陡邊坡更應(yīng)引起足夠重視,以避免大規(guī)模崩塌落石的危害;(4)無人機具有從上往下拍攝的優(yōu)勢,用于復(fù)雜艱險山區(qū)不良地質(zhì)勘察,可以起到事半功倍的效果;(5)本研究成果用于沙坡特大橋4#~10#墩左側(cè)高陡邊坡的整治,對于鐵路、公路高陡岸坡崩塌落石發(fā)育區(qū)的選線、勘察和設(shè)計具有借鑒意義。
[Abstract]:Research objective: the left side of Shapo Super Bridge No. 4 #Gun 10# is a high and steep slope, which belongs to a typical slope with gentle dip, and the investigation stage is defined as a collapse and falling rock site. It is found that the scale and engineering harm of the site are far greater than the original understanding. Based on aerial photography technology of UAV, through comprehensive investigation and geological analysis, the causes of rock collapse and slope deformation and failure mode are found out in this paper, and practical engineering measures are worked out. The conclusions are as follows: (1) the left side of the pier of Shapo Super Bridge No. 4 #jia10# is a high and steep slope with gentle dip angle, and the collapse and falling stone is serious because of sliding and compression induced tensile crack deformation and failure; (2) the regulation range of the high and steep slope. The emphasis is on the crossing joint from about 35 m away from the cliff to the cliff wall, and shall be fortified in sections according to height, and shall take clear square, anchor cable (ground beam), shotcrete anchor net, active protective net, anchor cable pile, anti-collision wall, It is appropriate to carry out comprehensive regulation by such measures as intercepting drainage ditch and so on. (3) the line selection along the mountain should be far away from the high and steep bank (edge) slope, and the high steep slope with gentle dip angle should be paid more attention to. (4) the UAV has the advantage of shooting from the top down and is used in the bad geological survey in the complex and dangerous mountainous areas. (5) the results of this study can be used to renovate the high and steep slope on the left side of the pier of the 4#y10# pier of Shapo Bridge, which can be used for reference in the route selection, investigation and design of the development area of the collapse and fall of the high and steep bank slope of the railway and highway.
【作者單位】： 中鐵二院工程集團有限責(zé)任公司;
【分類號】：U442.2
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本文編號：2183331