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Titlebook: An Introduction to Trenchless Technology; Steven R. Kramer,William J. McDonald,James C. Thom Book 1992 Van Nostrand Reinhold 1992 Horizont

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樓主: Falter
11#
發(fā)表于 2025-3-23 12:11:25 | 只看該作者
https://doi.org/10.1007/978-3-642-92240-4was not adapted for more common utility and construction applications for another two decades because of the cost of hardware; lack of small, easy-to-use equipment and instrumentation; and lack of a broad set of economic incentives. Small-diameter steerable horizontal boring was still more of a conc
12#
發(fā)表于 2025-3-23 14:31:39 | 只看該作者
13#
發(fā)表于 2025-3-23 18:06:59 | 只看該作者
https://doi.org/10.1007/978-3-642-48444-5tool location, even though it is out of sight of the operator. Instrumentation is required to locate, track, and steer a guided system. In this chapter we discuss a number of different types of systems that have been used for directional drilling and boring that may be adaptable to trenchless techno
14#
發(fā)表于 2025-3-24 00:36:57 | 只看該作者
https://doi.org/10.1007/978-3-642-48444-5(3) job implementation. The operator or contractor will have to evaluate the economic, technical, and often legal aspects of each of these tasks. In many projects, three parties will be involved: the client, the contractor, and the design firm. The design firm may be appointed by the client before i
15#
發(fā)表于 2025-3-24 04:09:50 | 只看該作者
https://doi.org/10.1007/978-3-642-48444-5pter to provide a cross section of the wide variety of equipment and applications encountered. The cases, illustrating successful and cost-effective applications, are taken from different operating environments and require a different approach to a variety of jobs.
16#
發(fā)表于 2025-3-24 09:38:18 | 只看該作者
https://doi.org/10.1007/978-3-663-06788-7ew installations with a 100-year working life. Fortunately, engineers working in the nineteenth century also held this view, and their utility systems still serve us. If utilities are to accept new ideas, they must be assured of the long-term performance and durability of what is being proposed.
17#
發(fā)表于 2025-3-24 14:02:43 | 只看該作者
18#
發(fā)表于 2025-3-24 17:45:25 | 只看該作者
Instrumentation Systems for Guided Boring,tool location, even though it is out of sight of the operator. Instrumentation is required to locate, track, and steer a guided system. In this chapter we discuss a number of different types of systems that have been used for directional drilling and boring that may be adaptable to trenchless technology.
19#
發(fā)表于 2025-3-24 22:40:52 | 只看該作者
20#
發(fā)表于 2025-3-25 02:43:08 | 只看該作者
Future Needs,ew installations with a 100-year working life. Fortunately, engineers working in the nineteenth century also held this view, and their utility systems still serve us. If utilities are to accept new ideas, they must be assured of the long-term performance and durability of what is being proposed.
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