CAJ | 학술논문

石家庄地铁1号线市招待所段至北国商城段为左右两线，区间隧道上方靠近一既有污水管道，污水管已使用60 a。整条区段上污水管道与隧道呈一定夹角，角度较小。其中靠近地铁车站k10＋928．290～k10＋943．59区间隧道断面尺寸有所扩大，且污水管底板距离左线隧道拱顶仅6．8 m，该区段既有污水管在隧道开挖过程中可能存在安全风险，并且受污水管可能的渗水影响，隧道本身开挖过程中也存在稳定问题。分别分析了隧道开挖过程中既有污水管底板、边墙和拱部横向和纵向应力分布规律，并通过分析纵向不均匀沉降和纵向应力分布的关系，对隧道开挖过程中既有污水管的破坏机制进行了探讨。最后针对工程特点，提出了改进的超前加固方案。石家庄地铁为石家庄市新建工程，对工程后续建设具有一定的借鉴意义。
석가장지철1호선시초대소단지북국상성단위좌우량선，구간수도상방고근일기유오수관도，오수관이사용60 a。정조구단상오수관도여수도정일정협각，각도교소。기중고근지철차참k10＋928．290～k10＋943．59구간수도단면척촌유소확대，차오수관저판거리좌선수도공정부6．8 m，해구단기유오수관재수도개알과정중가능존재안전풍험，병차수오수관가능적삼수영향，수도본신개알과정중야존재은정문제。분별분석료수도개알과정중기유오수관저판、변장화공부횡향화종향응력분포규률，병통과분석종향불균균침강화종향응력분포적관계，대수도개알과정중기유오수관적파배궤제진행료탐토。최후침대공정특점，제출료개진적초전가고방안。석가장지철위석가장시신건공정，대공정후속건설구유일정적차감의의。
Metro Line 1 from City Hostel to North Mall in Shijiazhuang has two lanes , the top of which is close to a sewage pipe that has been used for 60 years.There is a small angle between the sewage pipe and the tunnel.The section size of tunnel segment k 10+928.290~k10+943.59 near a metro station is larger and there is only about 6.8 meters from the base plate of the sewage pipe to the top of the left tunnel .The sewage pipe in this section maybe face risk during tunnel excavation and tunnel excavation will also face stability risk because of possible seepage .This paper mainly analyzes the horizontal and vertical stress distribution of base plate , side wall and arch of the sewage .Through the analysis of the longitudinal uneven settlement and vertical stress distri-bution, this paper discusses the failure mechanism of the existing sewage during tunnel excavation .On this ba-sis, this paper introduces improved forepoling proposals in view of the engineering characteristics , which may be of reference value for other tunnel construction in the city .