复杂地质条件下输水隧洞断面比选研究  

Study on cross section selection of water conveyance tunnel under complicated geological conditions

作　　者：李建 LI Jian

机构地区：[1]盘锦海陆土木工程有限公司,辽宁盘锦124000

出　　处：《东北水利水电》2020年第7期4-8,71,共6页Water Resources & Hydropower of Northeast China

摘　　要：为研究隧洞在遇复杂地质条件下出现的拱顶及边墙坍塌、涌水等不良地质问题,本文将城门洞型改为马蹄形断面,在同等条件下初步分析两种断面的开挖断面、净空比等水力条件,并采用边值法计算方法,引进专用水工隧洞结构计算软件SDCAD4.0,对两种断面输水隧洞在3种工况、不同荷载组合下的内力及变形情况进行计算,并进行受力分析比较,最后对两种断面主要工程量对应的工程投资进行比较,得出用马蹄形断面的代替原城门洞型设计断面,较好地解决了拱顶及边墙坍塌问题,能够较好的适应复杂地质情况下开挖及支护情况,加快施工进度,节省投资。因此,马蹄形断面能够较好的适应不良地质条件,在水力断面、结构受力及经济上均优于城门洞型,在以后设计中应更好地推广马蹄形断面形式隧洞。To study tunnel in under the complicated geological conditions in the vault and sidewall collapse and adverse geological problems such as water,this article changes arched section to horseshoe section,under the same conditions using the method of boundary value calculation method,the introduction of special hydraulic tunnel SDCAD4.0 structure calculation software,the two section of the water conveyance tunnel in three kinds of working condition,internal force and deformation under different load combination is calculated,and the two sections mainly quantities corresponding engineering investment comparison,it is concluded that use of horseshoe section instead of the original arched model the design section,horseshoe section is better than the arched,it was the conclusion.

关 键 词：不良地质、边值法 水利条件 内力计算 马蹄形 SDCAD4.0 不同工况 投资对比 

分 类 号：TV672.1[水利工程—水利水电工程]