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The invert is a reverse arch structure set at the bottom of the tunnel to improve the stress conditions of the upper supporting structure. It is one of the important components of the tunnel structure, and it is the foundation of the tunnel structure. On the one hand, it needs to effectively transmit the ground […]
It is understood that the water ditch cable trough is the final project of the tunnel’s preliminary construction, which is responsible for the drainage, the shielding interference of the control cable, and the protection function of the cable in the heavy corrosive environment. The construction process is relatively cumbersome, and the construction pays more attention […]
Tunnel construction can be divided into mountain tunnels, underwater tunnels and urban tunnels according to the location of the tunnel. Therefore, relevant departments must ensure the safety of their construction personnel. At present, with the extensive application of aerial survey, remote sensing technology, geophysical technology, measurement technology, electronic computer technology, etc., the technical level of […]
Due to the large cross-section of the highway tunnel, the quality requirements of the molded concrete lining are high, especially if the highway tunnel cancels the secondary treatment of the fireproof coating and cement paint on the second lining surface, the molded concrete lining will have appearance quality problems. Such as: ring-shaped joints are staggered […]
Today’s tunnel construction requires not only high quality but also fast speed. In order to ensure the quality and construction speed of the tunnel’s lining, a full-section and integral translational trolley is used in the lining construction to ensure the “inside real and outside beauty” of the lining The construction progress of the tunnel. First, […]
During the construction of the tunnel, construction facilities that meet the construction needs should be set up at each driving end, and the construction facilities should be managed in a closed manner. Tunnel construction facilities generally mainly refer to tunnel office and living facilities, jet concrete mixing station, steel bar processing plant (or assembly plant), […]
Now, the degree of mechanization of tunnel construction is relatively high. Generally speaking, in addition to understanding the configuration principles of tunnel construction, the following equipment will be used in the construction process: concrete mixing plant, concrete transport truck, concrete pump, generator set, Large-capacity transformers, high-lift pumps, constant-pressure water supply equipment, large electric air compressors, […]
During the construction of the tunnel lining, the midline, elevation, section and clearance dimensions shall meet the design requirements. The standards, specifications and requirements of the lining materials shall comply with the regulations of the Ministry of Railways’ current “Railway Tunnel Design Regulations”. 1. The lining shall not invade the boundary of the tunnel construction. […]
The mechanized construction of the tunnel has experienced three stages: small equipment drilling and blasting construction, large trackless transportation equipment drilling and blasting construction, and non-drilling and blasting construction. Part of the mechanized operation is gradually embarked on a process of comprehensive mechanized operation. From manual excavation to the use of TBM (tunnel boring machine), […]
In the current tunnel construction practice, considering the construction cost and construction speed, the selection sequence of the construction method is: full-section method one→bench method→circular excavation method with core soil method→intermediate wall method (CD method)→cross middle wall method (CRD method)→Double-side-side pilot pit method is considered from the perspective of construction safety, and the order of […]
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