TOUGH TUNNELING THROUGH BUSY CITY IS EASED BY MODIFIED MACHINES, METHODS.

被引：0

作者：

Ingersoll, Robert

机构：

来源：

Construction Methods and Equipment | 1975年 / 57卷 / 07期

关键词：

TUNNELING MACHINES;

D O I：

暂无

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学科分类号：

摘要：

A three-pronged attack on tough soil included a specially designed steel shield, a modified tunneling machine, and a unique placement of intermediate jacks to ram a 3/4-mi section of large diameter pipe into position in West Germany.

引用

页码：62 / 63