岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2014年
9期
2616-2622
,共7页
连续桩键结构%抗滑机制%加固效果%滑坡治理%三峡库区
連續樁鍵結構%抗滑機製%加固效果%滑坡治理%三峽庫區
련속장건결구%항활궤제%가고효과%활파치리%삼협고구
continuous pile-plug structure%anti-slide mechanism%reinforcement effect%landslide control%Three Gorges reservoir
连续桩键是一种新型抗滑结构，结合了阻滑键和抗滑桩结构型式的综合功能。采用二维FLAC程序对连续桩键结构与滑坡的作用效应进行了数值模拟。分析表明，结构的内在抗滑机制主要体现于有效减小滑带区域的剪切变形量、降低塑性区的发展程度、阻滞滑坡体的整体位移、调动滑体区域的岩土体抗力等方面，而其外在抗滑机制则对应于结构能有效加固设置区域岩土体和充分发挥整体抗滑支挡这两种作用。总体上结构处于剪切、弯曲和拉压的复杂受力状态，内力变形连续分布且均衡，相当于整体协调受力的连续刚架体系，其抗滑效果更加明显，并表现出良好的工作状态。连续桩键结构克服了单体结构的应用局限问题，而更充分发挥了对滑坡体的加固阻滑效果，显著提高了滑坡体的整体稳定安全裕度，对滑坡治理工程有更广泛的适用性，已被成功应用于三峡库区最复杂的地质灾害治理项目--猴子石滑坡治理工程，取得了良好的治理效果。
連續樁鍵是一種新型抗滑結構，結閤瞭阻滑鍵和抗滑樁結構型式的綜閤功能。採用二維FLAC程序對連續樁鍵結構與滑坡的作用效應進行瞭數值模擬。分析錶明，結構的內在抗滑機製主要體現于有效減小滑帶區域的剪切變形量、降低塑性區的髮展程度、阻滯滑坡體的整體位移、調動滑體區域的巖土體抗力等方麵，而其外在抗滑機製則對應于結構能有效加固設置區域巖土體和充分髮揮整體抗滑支擋這兩種作用。總體上結構處于剪切、彎麯和拉壓的複雜受力狀態，內力變形連續分佈且均衡，相噹于整體協調受力的連續剛架體繫，其抗滑效果更加明顯，併錶現齣良好的工作狀態。連續樁鍵結構剋服瞭單體結構的應用跼限問題，而更充分髮揮瞭對滑坡體的加固阻滑效果，顯著提高瞭滑坡體的整體穩定安全裕度，對滑坡治理工程有更廣汎的適用性，已被成功應用于三峽庫區最複雜的地質災害治理項目--猴子石滑坡治理工程，取得瞭良好的治理效果。
련속장건시일충신형항활결구，결합료조활건화항활장결구형식적종합공능。채용이유FLAC정서대련속장건결구여활파적작용효응진행료수치모의。분석표명，결구적내재항활궤제주요체현우유효감소활대구역적전절변형량、강저소성구적발전정도、조체활파체적정체위이、조동활체구역적암토체항력등방면，이기외재항활궤제칙대응우결구능유효가고설치구역암토체화충분발휘정체항활지당저량충작용。총체상결구처우전절、만곡화랍압적복잡수력상태，내력변형련속분포차균형，상당우정체협조수력적련속강가체계，기항활효과경가명현，병표현출량호적공작상태。련속장건결구극복료단체결구적응용국한문제，이경충분발휘료대활파체적가고조활효과，현저제고료활파체적정체은정안전유도，대활파치리공정유경엄범적괄용성，이피성공응용우삼협고구최복잡적지질재해치리항목--후자석활파치리공정，취득료량호적치리효과。
Continuous pile-plug structure is a new-type anti-sliding structure, with the combination of function of shear plug and slide-resistant pile. The FLAC2D numerical modeling program is used to model the relationship between continuous pile-plug structure and landslides. The result shows that, the internal anti-sliding mechanism of the structure can decrease shear deformation, reduce plastic zones, block slide displacement, mobilize rock-soil resistance;and the external mechanism is the reinforcement effect and retain function. In general, continuous pile-plug structure works under complex stress state with bending moment, shear force and axial force, and the internal force deformation distributes continuously and balanced corresponding to continuous rigid-frame under balanced force. Continuous pile-plug structure solves the limitation of monomer structure and behaves better in slide resistance and reinforcement of landslides. It improves the safety margin of mass movement stability significantly and has wider applicability in landslides management project. The continuous pile-plug structure is applied in Houzishi landslide control engineering, which is the most complex geological hazard control project in Three George reservoir, and obtains good governance effect.
