CAJ | 학술논문

为研究方形隧道断面衬砌水压力及内力，利用等效周长替代法，将方形隧道断面转变成圆形隧道断面，并运用轴对称解析法与有限差分 FLAC3D分别计算在不同衬砌渗透系数、不同注浆半径和不同衬砌厚度情况下，隧道衬砌水压力、渗透量、内力、偏心距以及安全系数。结果表明：轴对称解析法的渗透量和水压力与有限差分数值计算法的很接近；在不透水情况下，水压力不进行折减；通过控制排水、减小衬砌渗透系数、适当增大围岩注浆或适当增大衬砌厚度可以调节衬砌水压力、偏心距与安全系数；衬砌厚度对边角处安全系数影响大；以设计水荷载为正算，施工监测水压力为反算，在施工过程中，检验并修正水荷载。
위연구방형수도단면츤체수압력급내력，이용등효주장체대법，장방형수도단면전변성원형수도단면，병운용축대칭해석법여유한차분 FLAC3D분별계산재불동츤체삼투계수、불동주장반경화불동츤체후도정황하，수도츤체수압력、삼투량、내력、편심거이급안전계수。결과표명：축대칭해석법적삼투량화수압력여유한차분수치계산법적흔접근；재불투수정황하，수압력불진행절감；통과공제배수、감소츤체삼투계수、괄당증대위암주장혹괄당증대츤체후도가이조절츤체수압력、편심거여안전계수；츤체후도대변각처안전계수영향대；이설계수하재위정산，시공감측수압력위반산，재시공과정중，검험병수정수하재。
In order to study the rectangular tunnel cross -section lining water pressure and internal force,using the method of equivalent perimeter alternative that converts a square tunnel section into a circular tunnel section, and using the axisymmetric analytic method and the finite difference FLAC3D which are adopted respectively in calculating the tunnel lining hole pressure,flow,internal force,eccentricity and safety coefficient under the con-dition of different permeability coefficient,grouting radius and lining radius .The result of flow and pore pressure by axisymmetric analytic method and finite difference numerical calculation method is very close;Under the wa-ter -proof situation there is no reduction of the pore pressure;The water pressure upon lining ,eccentricity,fac-tor of safety can be adjusted by controlling the drainage increasing the grout of surrounding rock and the lining of the radius or decreasing the coefficient of permeability of lining.The lining of the radius has a most effect on fac-tor of safety in the corner.The normal computation was used to design the water load while the construction mo-nitoring water pressure was back calculated,and the water load should be inspected and corrected in the process of construction.