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Freezing method used in mountain tunnel cave filled the initial high water level of

Strength influenced by external factors, to the implementation of this ground freezing method, consider a direct-style (with depleting refrigerant systems), and its features are: frozen pipes placed after the implementation of the freeze, freeze wall may be in a few hours formation, freeze fast, easy, frozen wall, high strength, but higher cost. Science and Technology Communication \\Share kitchen Jing Ye Qian Star 【},-c.1 provision of a mattress a jump myeloid It Ting Li] at {1 Ting Ic. a clever cross-*- 1 cake of Kyushu started the longest land tunnel hole is shod Figure 9 surface (23K875m nearby) granite geology is very complex, in the shallow section of the strongly weathered, weathered granite. particularly in parts of clay where water inflow occurred, will produce local compression, which included the need for auxiliary methods including initial support. As high water table,[link widoczny dla zalogowanych], the line of the nearby residents are using well water,[link widoczny dla zalogowanych], so to consider the impact of the tunnel gushing. in particular, to consider the good of the emergency water supply measures, and then to construction. 5 Conclusion mountain is not only back vibration Naka tunnel in which the town of the city of water and bird habitat,[link widoczny dla zalogowanych], but also near the largest city in Kyushu, Fukuoka City, Spring City and the City and other cities Chikushino the main source of water. in particular, Fukuoka City, in the past rainfall is low, a serious shortage of water is often distressed. including in some places around, have also recognized that \technical issues related to tunnel and the tunnel water inflow problems caused by surface water balance in question, and the corresponding problem is also very important. One way to solve such problems is to set up a \\after Hakata, a new eight-generation of the project completion, the complete project management, at the same time, or to pursue the project economy. to reasonable advance Chikushi tunnel construction,[link widoczny dla zalogowanych], but also all levels of support and guidance, and relevant departments of the strong assistance. text contained''/ L, 11 - G '1 / 2004. P7 ~ 14 (in Japanese) by: Miura is declared positions Chi Chuan Zhe Chong Wa Tin Bucket (Continued from page 26) ② Press the search data, applied for under the regular fine sand layer is easy to form in the frozen permafrost layer or mesh, freeze low intensity, and thawing permafrost layer sharp drop in intensity, sandy soil into a thixotropic flow state, while the mesh can occur when the permafrost thawed largest settlement (collapses). how to take measures to protect the fine sand layer (sand moving water) and freeze effect? ③ freezing excavation, lining process should closely follow the excavation process, the use of FORM LINING, how to solve the lining Freezing of concrete problems, maintenance problems and intensity of the problem? and how to weaken when the heat of hydration of concrete gel on the impact of frozen wall? ④ because in this formation into the hole more difficult to freeze the pipe rupture will cause the whole procedure more big impact, so how to ensure that frozen pipes in the hole and the safety of the freezing process, when the inclinometer hole and the correction is an important issue. ⑤ how to frost heave and thaw weakening the structure of the lining? 3 Conclusion Based on the a tunnel work site under construction, the horizontal hole section of geological defects in the preliminary design of the freezing solution, to clarify this particular mountain tunnel construction method used in the feasibility of, and personal experience through the design, raised some technical issues with our colleagues in the common exploration. Although a variety of reasons Yuanliangshan Yuhuai Railway tunnel cave section of high pressure water filling did not use this program, but may encounter similar problems in future, the level of research is still freezing holes is very important. Here, in good faith I hope my colleagues on the queries raised by this article for guidance and help and strive to make this method complicated geological conditions in the mountain tunnel in the building become a mature technology, to solve the corresponding engineering problems.
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