At last this paper discusses the status in quo of trenchless technology.
对我国非开挖技术的现状进行了论述。
Trenchless construction faces significant risks as underground uncertainty, especially in a congested city.
由于地下的不确定性，特别是在拥挤的城市，非开挖施工常面临极大的风险。
Trenchless construction faces significant risks due to uncertainty underground, especially in a congested city.
由于地下的不确定性，特别是在拥挤的城市，非开挖施工常面临极大的风险。
As one of important methods of trenchless technology, impacting mole has been widely used because of some of its special advantages.
冲击矛技术作为非开挖技术的一个重要手段，由于其自身所具有的一些优势而被广泛采用。
Nanjing LOOK engineering tech co., Ltd is the high science and technology corporation that is the earliest research trenchless technology.
南京路可工程技术有限公司是国内较早从事非开挖技术研究开发的高科技企业。
This paper describes the construction, utilization, advantage and disadvantage of three kinds of trenchless techniques of lay polyethylene pipe.
论述了三种不挖沟敷设聚乙烯管技术的施工、应用和优缺点。
The trenchless pneumatic hammers which don t rotate themselves during drilling include impact moles, pipe ramming hammers and pipe bursting hammers.
穿孔过程中自身不回转的非开挖气动锤包括冲击矛、夯管锤和爆管锤。
As a trenchless technology for laying pipeline, pipe-jacking tunnel technology is increasingly displaying the enormous superiority in pipeline reconstruction.
微型顶管隧道作为一种非开挖地下管线敷设技术，在城市地下管线改造中日益显示出巨大的优越性。
Calculation for pipelaying resistance in current construction conditions to choose correct pipelaying method is the key for project success in trenchless technology.
在非开挖工程中，计算出当前工艺条件下的铺管阻力、选择正确的铺管方法是整个工程成败的关键。
The dropping buckle usually occurs when reverse pulling is used for expanding the bore in the trenchless construction, thus causing the fall-off of the drilling tools.
非开挖反向回拉扩孔施工过程中时常出现钻杆正转而发生退扣，造成钻具孔内脱落事故的反常现象。
Complicated formation condition and underground pipe network condition are the important factors that influence the quality of guided drilling of trenchless technology.
地层和地下管网条件复杂是影响非开挖导向钻进质量的重要因素。
This paper describes the characteristics of cable-laying-manners, and compares technical economy of trenchless technology in urban electric network engineering construction.
介绍了城市电网建设工程中各种电力电缆的敷设方式及其特点，对非开挖电力电缆敷设方式进行技术经济比较。
PE gas pipe laying is faster and efficiency, especially on trenchless technology. Application technology of PE gas pipeline engineering is advanced, efficient and in low fare.
聚乙烯燃气管道的施工速度快，效率高，特别是在非开挖施工技术上，聚乙烯管道的施工技术较钢管更先进，效率更高，费用更低。
The paper discussed the requirement and significance of engineering investigation for the application of trenchless technology in the diversion of rain and sewage of urban drainage system.
论文论述在城镇雨污分流工程中采用非开挖技术需要工程勘察的内容和要求。
At present, the most popular trenchless pipeline installation method is guided boring, but in the guided boring cave-in of the borehole wall eternally are encountered in quicksand formation.
目前最流行的非开挖铺管技术为导向钻进法，但这种施工法在流砂地层施工时容易发生塌孔。
At present, the most popular trenchless pipeline installation method is guided boring, but in the guided boring cave-in of the borehole wall eternally are encountered in quicksand formation.
目前最流行的非开挖铺管技术为导向钻进法，但这种施工法在流砂地层施工时容易发生塌孔。
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