柯文柱



摘要:隧道在浅埋、软岩及渗水地段的施工,对于掌子面围岩出现渗水、拱顶掉块、掌子面失稳、塌落甚至坍塌等问题。运用刚性袖阀管后退式注浆技术进行堵水、固结,能够有效的改善掌子面工况,保证隧道安全、高效、快速的施工。本文针刚性袖阀管后退式注浆技术在隧道浅埋、软岩及渗水地段的应用,通过具体的施工过程阐述,以期能够对今后类似的工程施工起到学习借鉴的作用。
Abstract: For tunnel construction in shallow, soft rock and water seepage areas, there are the problems of water seepage, vault loss, tunnel face instability, collapse in the surrounding rock of the tunnel face. The use of rigid sleeve valve tube retreat grouting technology for water blocking and consolidation can effectively improve the working conditions of the tunnel face and ensure the safe, efficient and rapid construction of the tunnel. In this paper, the application of rigid sleeve valve tube retreat grouting technology in the shallow buried, soft rock and water-permeable sections of the tunnel is explained through the specific construction process, in order to learn from similar engineering construction in the future.
關键词:刚性袖阀管;后退式注浆;隧道;技术
Key words: rigid sleeve valve tube;backward grouting;tunnel;technology
中图分类号:U454 文献标识码:A 文章编号:1006-4311(2020)23-0079-03
0 引言
袖阀管注浆施工技术又称索列坦休斯工法,这种注浆方法是由法国Soletanche公司最先提出并应用的,在国内叫做袖阀管注浆工法。由于能有效的控制注浆范围和有效的控制注浆压力,并且可以进行重复注浆,另外在注浆过程中发生冒浆、串浆的可能性较小,所以在国内以及国外都对这个注浆方法比较认可,是一种最可靠的注浆工法。
袖阀管注浆其主要特点是:①在施工中因场地问题而受到限制时,可以采用斜向打孔的方式,对施作段进行斜孔注浆,而且可在洞内进行水平注浆;②结构由外管、内管(双栓塞芯管)、橡皮套、密封圈等组成,注浆时只能通过橡皮套下的注浆孔由管内向管外出浆,管外浆液被橡皮套阻隔,无法向管内返浆的一种单向注浆装置;③可以根据现场地质情况,调整注浆长度,对不同地层定压、定量、定尺,实现可控注浆,而且可对任意一个段落进行重……