Jingzhai 188bet sports betting construction site (photographed by Yao Wei, Chen Chang, Xu Zhangwei)
Construction workers are working on the 188bet sports betting face (photographed by Yao Wei, Chen Chang, Xu Zhangwei)
Construction workers conduct measurement operations on the 188bet sports betting (Photographed by Yao Wei, Chen Chang, and Xu Zhangwei)
A corner of Jingzhai 188bet sports betting (photographed by Yao Wei, Chen Chang and Xu Zhangwei)
June 5，The reporter learned from 188bet sports betting Railway Kunming Bureau Group Co., Ltd.，After more than 4 years of hard work day and night by the builders，188bet sports betting (188bet sports betting) La (Laos) Kun (Ming) Vientiane (Xiang) Railway Jingzhai Tunnel is safely completed，Full transition to inverted arch、Construction of remaining works such as lining and ballastless track。To this point，All 167 tunnels on the 188bet sports betting-Laos Railway have been completed，Laid a solid foundation for the opening of operations at the end of the year。
Jingzhai 188bet sports betting is located in Jinghong City, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province，Full length 9.5 kilometers,It is a single-lane 188bet sports betting with a driving speed of 160 kilometers per hour，After completion and opening, the train will only take 4 minutes to pass，The builders persisted for more than 1,600 days and nights。
188bet sports betting crossing the Lancang River Fault Zone，Travel closely with the Lancang River，Maximum burial depth 711 meters，Complex geological structure，Surrounding rock broken、rich water，Uneven softness and hardness。With layer bias、Big deformation of soft rock、Water and mud bursting、Characteristics such as high ground stress，It is a high-risk 188bet sports betting，The deformation section is up to 2.4 kilometers，Crossing water-rich broken rock 1.5 kilometers。
"Since the start of construction，A total of water and mud bursts occurred in the tunnel、Collapse、Nearly a thousand dangerous situations such as soft rock deformation，The maximum water inflow in the tunnel in a single day reaches 7.50,000 cubic meters，Can fill 30 standard swimming pools。" said Liu Tiecheng, manager of the Yumo 188bet sports betting 19th Bid Project Department of CCCC First Harbor Engineering Company，The construction process has added many difficulties to us，We double our investment in personnel and equipment support，Use global resources to ensure safe and stable progress of tunnel construction。
As understood，Except for water and mud，Large deformation of soft rock in tunnels is rare at home and abroad，Single-lane 188bet sports betting with a span of more than 9 meters，Finally excavated in a day 4、5 meters，The 188bet sports betting will deform and shrink in a few days，Constructors can only dig forward one meter on each side，Turn around and reprocess the deformation。The most serious initial support deformation reached 2.2 meters，Double-layer steel arch twisted into an "S" shape。
"Under the combined action of large deformation of soft rock and bedding bias pressure，Circular cross section of the tunnel，One side continues to squeeze inward，The arc becomes a straight line，So it is very easy to cause the primary steel frame of the arch to be twisted or sheared，If it is not handled in time or reinforced improperly，Easy to cause tunnel collapse。" said Zhou Kuncheng, manager of the Jingzhai Tunnel Incline Shaft Work Area of 188bet sports betting Railway Tunnel Bureau。
Facing the risks of muddy water inrush and large deformation of soft rock that may occur at any time，188bet sports betting Railway Kunming Bureau Group established a joint working group for Jingzhai Tunnel composed of leaders and experts from participating units，Coordinate, coordinate and supervise the promotion of tunnel construction，Technical research has been organized on site、Quality and safety management、Construction Organization Promotion Team and Party Member Commando，Invited experts for consultation many times。CCCCC First Harbor Bureau、188bet sports betting Railway Tunnel Bureau and other participating units have the same goal、Attack all efforts，Using curtain grouting and advanced large pipe shed to reinforce surrounding rock、Double or triple layer support，And the construction technology of three-step reserved core soil，Promote project construction safely and orderly，Ensuring the safe passage of the tunnel。
167 tunnels on the 188bet sports betting-Laos Railway，Total length of more than 590 kilometers，Accounting for 63% of the total length of the entire line，Heavy construction tasks。There are 93 tunnels in the domestic section of 508 kilometers，15 over 10 kilometers，Weak surrounding rock accounts for 87%，Loose and broken rock mass，Groundwater development，Known as "living geological museum"，Extremely difficult to build，Jingzhai Tunnel is its typical representative。
"The last fortress, Jingzhai Tunnel, was successfully conquered，Laid a solid foundation for high-quality launch at the end of the year。" said Ma Youliang, deputy commander of the Southern Yunnan Railway Construction Headquarters，Currently，The 188bet sports betting-Laos railway domestic section project is progressing smoothly，Roadbed、The bridge is fully completed，11 station buildings are fully decorated，More than 95% of the track laying project has been completed，It’s just around the corner from Kunming to Vientiane by train。
The total length of the 188bet sports betting-Laos railway is more than 1,000 kilometers，Starting from Kunming, the capital of Yunnan Province in the north，South to Vientiane, the capital of Laos，By domestic segment、The Laos section consists of two sections，It is a docking project between 188bet sports betting’s “One Belt, One Road” initiative and Laos’ strategy of “changing a land-locked country into a land-linked country”，After completion and opening to traffic，It only takes more than 3 hours from Kunming City, Yunnan Province to Jinghong City, Xishuangbanna Dai Autonomous Prefecture，Direct transportation to Vientiane, Laos is expected、Same day access。(188bet sports betting Daily Yunnan Reporter Station)
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