海底隧道,施工,防水,地下工程,风险

岩石力学与工程学报 Vol.26 Supp.2

2007年12月 Chinese Journal of Rock Mechanics and Engineering Dec.，2007

第26卷 增2

厦门翔安海底隧道富水砂层注浆试验

陈铁林，滕红军，张顶立

(北京交通大学 土木建筑工程学院，北京 100044)

摘要：针对我国第一条海底隧道——厦门翔安海底隧道富水砂层段进行注浆试验，采用钻孔取芯和压水的方法对注浆效果进行检验，摸索该条件下的一些注浆规律，提出注浆量、注浆压力、注浆速度、扩散半径等注浆参数。通过试验研究海水对浆液强度的影响。研究结果表明，海水延长初凝时间、减缓浆液强度上升的速度、稀释浆液并加剧不均匀扩散。结合翔安海底隧道施工注浆的经验可以得出，以上几个问题是在海水注浆中值得深入研究的，其研究结果可为厦门海底隧道注浆的设计、施工提供指导，并可为相关工程提供重要的参考。 关键词：隧道工程；海底隧道；注浆；富水砂层

中图分类号：U 45 文献标识码：A 文章编号：1000–6915(2007)增2–3711–07

GROUTING TEST ON WATER-ENRICHED SAND LAYER OF XIAMEN

XIANG′AN SUBSEA TUNNEL

CHEN Tielin，TENG Hongjun，ZHANG Dingli

(School of Civil Engineering and Architecture，Beijing Jiaotong University，Beijing 100044，China)

Abstract：Water-enriched sand layer will bring difficulty for grouting and therein result in failure of grouting. The influence of the seawater increases the difficulty of grouting. This paper presents grouting in water-enriched sand layer of the first subsea tunnel—Xiamen Xiang′an subsea tunnel，China. Drilling and pushing water are used to check the grouting result. Some grouting rules are obtained and some parameters such as grouting amount，grouting pressure，grouting speed and diffusion radius are suggested. This paper also finds the results of an experimental investigation applied to the study of the effects of seawater. The result indicates that the seawater will delay the time of initial setting，slowing down the speed of gain in strength，diluting the density of slurry and aggravating differential pervasion of grouting. Several problems of grouting in seawater are discussed from the test and the construction experiences of Xiamen Xiang′an subsea tunnel. The study can provide instructional advice for both design and construction of grouting of the Xiang′an subsea tunnel. Meanwhile it can also provide important reference to similar project.

Key words：tunnelling engineering；subsea tunnel；grouting；water-enriched sand layer

1 工程概况

厦门翔安隧道是连接厦门岛和陆地翔安区之间的通道，主要穿过陆域、浅滩、全强分化花岗岩和

收稿日期：2007–07–14；修回日期：2007–09–08

基金项目：国家高技术研究发展计划“863”项目(2006AA11Z119)

海底弱、微风化花岗岩中，场区基岩埋藏不深，但全～强风化带厚度相差悬殊，微风化顶面多处于0～－55 m，穿越3条全～强风化基岩深槽和一条风化囊，总长度约360.2 m，个别风化深槽低于100 m，海水最深处为30 m，全水头高度设计采用65 m。设

作者简介：陈铁林(1970–)，男，博士，1993年毕业于淮南矿业学院采矿工程专业，现任副教授，主要从事岩土工程方面的教学与研究工作。E-mail：geotlchen@