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【工程范例】2003年～2004年施工的北三环(和平东桥—太阳宫西路)热力外线工程,是一个“浅埋暗挖”的典型范例。本段热力隧道的开挖尺寸为宽度4.7米×高度3.9米,马蹄形断面,结构为初支格栅钢架网喷砼+LDPE柔性防水+二衬钢筋抗渗砼结构自防水复合式衬砌,覆土厚度3～7米不等,采用
【Exemplary Project】 The external thermal project of North 3rd Ring Road (Peace East Bridge - Sun Palace West Road) constructed from 2003 to 2004 is a typical example of “deep-buried and undercut”. The excavation dimension of this section of the thermal tunnel is width 4.7 meters x height 3.9 meters, horseshoe-shaped section, structure of the initial support grille steel net sneeze + LDPE flexible waterproof + two lining reinforced anti-seepage structure self-waterproof composite lining, casing Thickness ranging from 3 to 7 meters, using