How common is the application of rolling mortar wall in subway tunnel engineering?

Rolling mortar wall is a commonly used construction method in subway tunnel engineering, which plays a very important role in the construction of underground tunnel through special technology and equipment. The following will be from the rolling wall principle, characteristics, construction process and in the subway tunnel engineering application in detail, in order to understand the rolling wall in the subway tunnel engineering in general application.

Rolling the mortar wall is a mechanical construction method, which is mainly completed by using a special equipment called a mortar mill. The rolling mill uses the rotating rolling head to crush, disperse and tamp the soil layer while driving underground, so as to enhance the stability and bearing capacity of the tunnel. The mortar mill has the characteristics of flexibility and energy saving, and is often used in the construction of subway tunnels, traffic tunnels, urban pipe corridors and other projects.

In the subway tunnel engineering, rolling mortar wall is widely used in the construction process of regular tunnel and entrance. Its application is mainly reflected in the following aspects:

Tunnel construction: rolling mortar wall can be used for subway tunnel cutting and compaction, it can effectively deal with rock, soil and other geological conditions, improve the efficiency and quality of tunnel construction.

Soil improvement: the rolling mortar wall can improve the physical properties of the underground soil, improve the bearing capacity and stability of the soil, so as to ensure the safe construction of the subway tunnel.

Earth pressure balance shield method: in the application of shield construction of subway tunnel, rolling mortar wall can be used to stabilize the surrounding soil, to prevent the tunnel construction process of ground subsidence and groundwater level decline and other issues.

Tunneling and backfilling: The rolling of the wall allows simultaneous tunneling and backfilling operations, reducing project time and increasing project efficiency. In the construction of subway tunnel, rolling the wall can effectively reduce the impact of vibration and noise on the surrounding environment.

In the subway tunnel project, the construction process of rolling the wall generally includes the following steps:

Section layout: according to the tunnel design requirements and geological conditions, determine the tunnel section size and shape.

Geological survey: conduct geological survey to obtain detailed information on geology and groundwater conditions to provide a basis for subsequent construction decisions.

Equipment preparation: prepare mortar mill and other construction equipment, and carry out equipment inspection and debugging.

Pre-construction preparation: temporary enclosure, soil cleaning and lifting of the construction site.

Construction implementation: according to the design requirements, the use of mortar mill tunneling and backfilling operations.

Ring plate installation: during the construction of the tunnel, the reinforced concrete ring plate is installed as needed to strengthen the tunnel.

Project quality inspection: quality inspection shall be carried out for each link in the construction process to ensure the construction quality is qualified.

Project completion acceptance: after the completion of the construction, the project completion acceptance, to ensure that the construction results meet the design requirements and relevant standards.

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