Introduction of tunnel lining trolley

Introduction of tunnel lining trolley

Tunnel lining refers to a permanent support structure built with reinforced concrete and other materials along the periphery of the tunnel body to prevent the deformation or collapse of surrounding rock. The lining is a lesson that must be learned in the design of tunnel structures. Tunnel lining trolley tooling is very important tooling in construction. The design of the tunnel lining trolley is very special, so let me introduce it to you in detail!

Here is the content list:

l Two designs of integral steel support for tunnel lining trolley

l Demoulding design of tunnel lining trolley

l Tunnel lining trolley seat design

l Walking design of tunnel lining trolley

Two designs of integral steel support for tunnel lining trolley

Gantry type, heavyweight, with a column height of about 2.3 meters and a gantry beam of 2.6 meters, the overall support is more reasonable. It can better transmit the compressive stress of the formwork to the column, which is suitable for the needs of fast filling of the transfer pump. The truss type is lightweight, the column is about 2.9 meters, the gantry beam is a truss structure, and the overall support is more reasonable. It can better transmit the compressive stress of the formwork. When pouring concrete, pay attention to the rhythm of the transfer pump. Now, with the advancement of construction tooling, the letter A-type structure has appeared in the theme structure of the tunnel lining trolley, which has a simple structure, reasonable overall force, and can transmit the lateral pressure of concrete to the ground.

Demoulding design of tunnel lining trolley

Tunnel lining trolleys are available in two demold designs. The first is that the jacking mechanism is located at the upper end of the gantry. This method has a simple structure, and the lifting capacity is only the weight of a single-side formwork. In the second type, the jacking mechanism is located below the bottom beam. In this method, the entire cart is lifted into place by the jacking cylinder, and the weight of the cart is transferred to the ground by the cylinder. The second is more than twice the lifting force of the first.

Tunnel lining trolley seat design

The centerline of the tunnel lining trolley formwork should coincide with the tunnel centerline. After the trolley is in place, the center position of the template needs to be adjusted. Now there are two general adjustment methods, generally up and down. Both the gantry type and the truss type adopt the upward adjustment. The upper adjustment is to install four translation cylinders on the top of the gantry, so that the template moves left and right, only the template is moved, and the gantry is not moved. Therefore, the tunnel centerline coincides with the formwork centerline. The lower position is to design a saddle device at the bottom of the walking beam, lift the mast with eight oil cylinders, and then translate the entire trolley. In this way, the center line of the tunnel coincides with the center line of the trolley formwork, and the trolley is in place.

Walking design of tunnel lining trolley

The walking design of tunnel lining trolleys is divided into two types: wheel-rail type and walking type. For the wheel-rail type, before the trolley travels, the rails are laid according to the center of the tunnel and the cross-section of the trolley, generally 43 or 50 rails. This way of laying requires manual cooperation, but it is quickly in place. Walking on foot, the trolley has its walking device, which is driven by hydraulic pressure to realize walking. This method does not require manual work, but it is relatively slow in place.

Through my introduction, did you know more about the tunnel lining trolley? Hope this article is helpful to you!