工程地质学报
工程地質學報
공정지질학보
2010年
1期
66-71
,共6页
西藏樟木%古滑坡%变形监测
西藏樟木%古滑坡%變形鑑測
서장장목%고활파%변형감측
Zhangmu Tibet%Ancient landslide%Deformation monitoring
樟木口岸古滑坡位于喜马拉雅山脉南麓,地形陡峻,构造运动强烈,地震活动频繁,雨量丰沛,基底为前震旦系达莱玛桥组黑云斜长片麻岩、片岩,上覆第四系残坡积、崩坡积物.本文采取地表裂缝监测、地表位移监测和深部位移监测3种方法,对古滑坡的变形特征与规律进行了较系统研究分析.监测结果表明两个古滑坡未发生变形,处于稳定状态,福利院古滑坡体中部发生复活,即消防队次级滑坡,目前该滑坡处于蠕动挤压阶段,变形呈缓慢增长趋势,降雨和人为开挖坡体是滑坡复活的诱发因素.
樟木口岸古滑坡位于喜馬拉雅山脈南麓,地形陡峻,構造運動彊烈,地震活動頻繁,雨量豐沛,基底為前震旦繫達萊瑪橋組黑雲斜長片痳巖、片巖,上覆第四繫殘坡積、崩坡積物.本文採取地錶裂縫鑑測、地錶位移鑑測和深部位移鑑測3種方法,對古滑坡的變形特徵與規律進行瞭較繫統研究分析.鑑測結果錶明兩箇古滑坡未髮生變形,處于穩定狀態,福利院古滑坡體中部髮生複活,即消防隊次級滑坡,目前該滑坡處于蠕動擠壓階段,變形呈緩慢增長趨勢,降雨和人為開挖坡體是滑坡複活的誘髮因素.
장목구안고활파위우희마랍아산맥남록,지형두준,구조운동강렬,지진활동빈번,우량봉패,기저위전진단계체래마교조흑운사장편마암、편암,상복제사계잔파적、붕파적물.본문채취지표렬봉감측、지표위이감측화심부위이감측3충방법,대고활파적변형특정여규률진행료교계통연구분석.감측결과표명량개고활파미발생변형,처우은정상태,복리원고활파체중부발생복활,즉소방대차급활파,목전해활파처우연동제압계단,변형정완만증장추세,강우화인위개알파체시활파복활적유발인소.
A group of huge ancient landslides locates at Zhangmu port to the south of Himalayas. The slope terrain of the landslides is steep. The regional tectonic movement is strong. Seismic activity is frequent. Rainfall is very abundant. The lower of stratum forming the landslides is biotite plagiogneiss & schist of Sinian period. The upper is eluvial deposits, colluvial deposits and deluvial materials of Quaternary period. In recent years, some of the ancient landslides moves acutely as a result of rapid town construction and development. The ground movement has caused damage of many town buildings. It is estimated that properties of about 8 hundred million RMB and 8000 local people are being threatened by the landslides. The systematic deformation characters and patterns of the landslides are examined with the superficial crack monitoring, superficial displacement monitoring and deep borehole displacement monitoring. The results of the monitoring indicate that two ancient landslides may be stable. Rainfall and human activities triggered the revival of Xiaofangdui landslide. This Xiaofangdni landslide is at the stage of creep and extrusion. Its landslide deformation has a slowly rising tendency.