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    • 7. 发明授权
    • Tunnel boring with foamed composition
    • 隧道用发泡组合物钻孔
    • US06802673B1
    • 2004-10-12
    • US10049367
    • 2002-05-03
    • Peter Ellenberger
    • Peter Ellenberger
    • E21D900
    • E21D9/06C09K8/38E21D9/0685
    • A process of boring a tunnel using an earth-pressure balance shield boring tunnelling machine having a cutting head, an excavation chamber for soil removed by boring and conveying means for removal of said soil from the excavation chamber; wherein there is injected into a stratum being bored at the cutting head a foamed aqueous solution, characterized in that (a) the aqueous solution contains two essential components which are (i) a sulphate- or sulphonate-containing anionic susfactant, and (ii) &bgr;-naphthalene sulphonate-formaldehyde condensate; and in that (b) there is applied to the soil removed by boring in at least one of the excavation chamber and the conveyor a second aqueous solution containing essentially a high molecular weight polyethylene oxide and optionally a sulphate- or sulphonate-containing anionic surfactant. The process allows easy removal of soil from the cutting head to the excavation chamber and from the excavation chamber out of the machine. It is particularly effective for sticky soils with high proportions of clay and high water content.
    • 一种使用具有切割头的土压平衡屏蔽钻孔隧道机进行钻孔的过程,用于通过钻孔除去的土壤的挖掘室和用于从所述挖掘室移除所述土壤的输送装置; 其中注入到在切割头处钻孔的层中的发泡水溶液,其特征在于(a)所述水溶液含有两种必需组分,所述组分是(i)含硫酸盐或磺酸盐的阴离子表面活性剂,和(ii) β-萘磺酸 - 甲醛缩合物; 并且在(b)中,通过在至少一个挖掘室和输送机中的镗孔去除的土壤基本上含有高分子量聚环氧乙烷和任选的含硫酸盐或磺酸盐的阴离子表面活性剂的第二水溶液。 该过程允许从切割头到挖掘室以及从挖掘室离开机器的土壤容易地移除。 对粘土和高含水量的粘土具有特殊的效果。