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The entire mass of the tunnel lining trolley is transmitted to the supporting organization through the steel mold of the trolley, and then to the portal frame. The lining concrete is in a solid-liquid state. Large vertical pressure and lateral pressure are generated on the top and side, and a large buoyancy occurs together. When […]
In the process of tunnel construction, some key construction procedures are often encountered, such as: hole excavation, hollow anchor grouting quick joint, sprayed concrete, overall processing of steel arches, connecting plate processing and installation, secondary lining Rebar installation, waterproofing, secondary lining concrete, lining concrete curing, cable trench and drainage ditch, etc. What should be the […]
The tunnel lining trolley is mainly used in the secondary lining process of the tunnel, and its main function is to help the tunnel achieve the required surface shape and size of the construction. The manufacture of tunnel lining trolleys mainly uses steel. Due to the use of steel, the tunnel lining trolley has certain […]
In the process of constructing the secondary lining of the tunnel, the tunnel lining trolley is a kind of special tunnel lining equipment that must be used. This is to ensure the safety of use after the tunnel is completed. The tunnel lining trolley is very important in the tunnel construction. In order to avoid […]
In the construction of the tunnel, the positioning of the trolley is a very important step. Before the lining trolley is used in the tunnel for the first lining, the positioning of the trolley must be done well, so that the trolley is aligned with the center line of the tunnel. There is no problem […]
With the rapid development of tunnel construction technology, the requirements for railway tunnel construction standards are getting higher and higher, especially the requirements for the waterproof and drainage construction of long and large tunnels and the inverted arch construction are constantly increasing. Generally, the inverted arch is fully constructed and the concrete is poured at […]
In the current tunnel construction practice, considering the construction cost and construction speed, the selection sequence of the construction method is: full-section method→step method→circular excavation method with core soil method→intermediate wall method (CD method)→cross middle wall method ( CRD method)→Double-side pilot pit method; from the perspective of construction safety, the order of selection should be […]
Tunnel lining plays an important role in the support of tunnel engineering. It is a permanent support structure built along the periphery of the tunnel body in order to prevent deformation or collapse of the surrounding rock. In actual construction, the quality control of the following links needs to be done. For details, please go […]
Lining trolley is a large non-standard mechanical equipment used for secondary lining in tunnel construction. Its main structure is a steel structure combined with plate and beam. It is widely used in the construction of railways, highways and water conservancy and hydropower projects. It is difficult to analyze and calculate the strength and rigidity of […]
In order to solve the problem of cracking of tunnel construction joints and the frequently-appearing handover acceptance problem, various construction units have paid a great price to solve this problem. If there is a way to effectively effect the newly poured second lining end during the construction process Protection not only saves a lot of […]
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