|
|
|
| Analyses of the Cause for the Fracture of Monolithic Concrete Bed in Tunnel and Treatment Measures |
| CHENG Xue一wu．DONG Jing |
| Beijing Railway Administration，Beijing 100038，China |
|
|
|
|
Abstract Research purposes: With continuous construction of passenger dedicated line，the ballastless track becomes more and more．However，with the increase of the traffic volume and service life，the roadbed default often occurs in tunnel，which disturbs the traffic safety．Especially the fracture of monolithic concrete bed in the tunnel built in 1960s or 1970s becomes common default．This paper analyzes the causes for the fracture and puts forward the treating measures for tile fracture．
Research conclusions: The fracture of monolithic concrete bed in tunnel has t}le characteristics of concealment．Sudden occurrence and continuity．The causes for the fracture are the dissolution and corruption of underground water，defaults of construction and maintenance and shoItage of maintenance．The measures of dredging underground water，adjusting the track gradient partly and mud jacking can be taken for the fracture．The practices show the perfect result has been got by taking these measures．
|
|
Received: 19 December 2008
|
|
|
|
|
|
[1] 铁道部.铁路工务技术手册#隧道[K].北京:中国铁道 出版社, 1997.
[2] 铁道部人才服务中心.铁路工务[M ].成都:西南交通大 学出版社, 1998.
[3] Q /BT 06-0033. 3-1999,铁路隧道路基大修工程作业标 准[S].
[4] 西南交通大学.铁路工程地质[M ].成都:人民铁道出版 社, 1979.
[5] 西南交通大学土木工程学院.既有线提速时速200km /h 线路维护技术(初稿) [R].成都:西南交通大学, 2006.
|
|
|
|
2009, Vol. 26 
