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自１９８５年伦敦第一届非开挖技术研讨会暨设备展示会举行以来，非开挖技术已取得长足的发展，现在已有５０多种非开挖或无沟渠技术与工艺，其范围从地下管线的定位到小口径管道的换衬和大口径下水道的安装。 本文拟讨论有关管衬技术、小口径水平定向钻、冲击矛以及下水道光缆
Since the First Trenchless Technology Conference and Equipment Exhibition in London in 1985, trenchless technology has made great strides and now there are over 50 trenchless or trenchless technologies and processes ranging from underground Pipeline positioning to the small-diameter pipe lining and large-diameter sewer installation. This article discusses the pipe lining technology, small diameter horizontal directional drilling, impact spear and sewer fiber optic cable