交通科学与工程
交通科學與工程
교통과학여공정
JOURNAL OF CHANGSHA COMMUNICATIONS UNIVERSRTY
2014年
2期
46-50
,共5页
柳厚祥%郑智雄%胡勇军%赵明纲
柳厚祥%鄭智雄%鬍勇軍%趙明綱
류후상%정지웅%호용군%조명강
岩层倾角%高地应力隧道%数值模拟%锚杆优化
巖層傾角%高地應力隧道%數值模擬%錨桿優化
암층경각%고지응력수도%수치모의%묘간우화
rocks dip%high geostress tunnel%numerical simulation%anchor optimization
以层状岩体高地应力隧道为工程背景,采用数值模拟的方法,分析层状岩体的不同倾角对高地应力隧道稳定性的影响。研究结果表明:高地应力隧道相对于普通地应力隧道,其支护结构承受的荷载更大,隧道的稳定性问题更加突出;在25°~65°范围内,锚杆轴力随岩层倾角增大而增大的趋势明显。结合分析结果,通过将锚杆与岩层大角度相交,使多层岩体串联,从而增大了岩体层间阻力,减小了层间剪切错动的可能性,使锚杆充分发挥销钉的作用,减小了支护结构受力,增强了隧道围岩的稳定性。
以層狀巖體高地應力隧道為工程揹景,採用數值模擬的方法,分析層狀巖體的不同傾角對高地應力隧道穩定性的影響。研究結果錶明:高地應力隧道相對于普通地應力隧道,其支護結構承受的荷載更大,隧道的穩定性問題更加突齣;在25°~65°範圍內,錨桿軸力隨巖層傾角增大而增大的趨勢明顯。結閤分析結果,通過將錨桿與巖層大角度相交,使多層巖體串聯,從而增大瞭巖體層間阻力,減小瞭層間剪切錯動的可能性,使錨桿充分髮揮銷釘的作用,減小瞭支護結構受力,增彊瞭隧道圍巖的穩定性。
이층상암체고지응력수도위공정배경,채용수치모의적방법,분석층상암체적불동경각대고지응력수도은정성적영향。연구결과표명:고지응력수도상대우보통지응력수도,기지호결구승수적하재경대,수도적은정성문제경가돌출;재25°~65°범위내,묘간축력수암층경각증대이증대적추세명현。결합분석결과,통과장묘간여암층대각도상교,사다층암체천련,종이증대료암체층간조력,감소료층간전절착동적가능성,사묘간충분발휘소정적작용,감소료지호결구수력,증강료수도위암적은정성。
Based on the high geostress layered rocks tunnel,the impact on high geostress tunnels stability with layered-rock dips have been analyzed by the numerical simulation method.The results are shown as follows:Compared with the normal geostress tunnel, high geostress tunnel’s support structure was under bigger load,the tunnel’s stability issues will be more prominent;with the rock dip’s rise in 25°~65°scope,the anchors’ axial force was increased obviously.Combined with the analysis results,the anchor is in-tersected with layered rocks in large angle,which can be linked up with more layers,the resistance between layers of rock mass will be increased,and the possibility of the inter-laminar shear rupture is reduced,the role of pin bolt was fully played,the supporting structure’s load is reduced and the stability of the surrounding rock is enhanced.