


摘 要:福华支线顶管隧道未设置接收井,顶管机无法用常规方法接收,故顶管机壳做弃壳处理,机壳作为隧道支护部分,其余部分拆解为便于运输及吊装的单一部件。拆解部件吊装前要进行吊装能力计算,汽车吊额定起重量均大于吊装计算载荷,满足起吊要求,为无接收井顶管接收提供了可借鉴案例。
关键词:电缆隧道;顶管;接收;拆解
中图分类号:U455.49文献标识码:A文章编号:1003-5168(2021)01-0104-03
Abstract: There is no receiving well in the pipe jacking tunnel of Fuhua branch line, and the pipe jacking machine cannot be received by conventional methods. Therefore, the casing of pipe jacking shall be discarded, and the casing shall be taken as the supporting part of the tunnel. The rest parts shall be disassembled into single parts for easy transportation and hoisting. Before hoisting, the hoisting capacity shall be calculated. The rated lifting capacity of truck crane shall be greater than the calculated lifting load, which meets the lifting requirements, so it is not accepted the case of pipe jacking receiving is provided.
Keywords: cable tunnel;pipe jacking;receiving;dismantling
顶管机洞内拆解技术是将完成施工任务的顶管机拆解为便于运输及吊装的单一部件,其拆解思路与组装思路正好相反。当前,关于洞内拆机的研究取得了较大成果。例如,陶涛针对城市繁华区域施工用地小的问题,对12号线虹梅路站2号出入口极小始发井无接收井矩形顶管法施工的始发、顶进、接收等关键点施工方法进行了论述[1];郭卫社介绍了台山核电站越海盾构机拆卸、吊装出井的顺序、过程及拆机重点控制项目[2];黄金光根据部件質量及吊装高度,研究设计小车式电动葫芦+倒链起重系统加快中天山隧道TBM拆机进度,减小施工难度[3];吕波等介绍了接收井盾构解体吊装,拆装时用千斤顶移动盾构本体部分,避免了竖井空间限制,将解体部件逐一吊出接收井[4]。但是,洞内拆机文献主要是盾构机方面,顶管机洞内拆解尚不多。因此,本文以福华支线顶管法隧道无接收井为例,介绍顶管机洞内拆解技术,通过汽车吊将拆解部件运至地面。
1 工程概况
福华支线顶管法隧道长375 m(SZ2K0+000~SZ2K0+375),顶管由中心七路东侧的SJ7-1竖井始发向东沿福华路南侧顶进,沿线下穿地铁岗厦地下商业街出入口,止于彩田路。……