Bagged concrete foundation structure with limit device for immersed tube tunnel

Abstract

The invention relates to a module concrete limit basic structure applied in the pipe-sink tunnel project, which mainly comprises the steel plates on the basic top surface, and the module bags on the side and bottom surfaces. It is characterized in that: it also comprises concrete irrigating hole, checking holes, module bag anti-turn device, and limit device. Wherein, the limit device is welded on two sides of said top steel plates; the module bag is made by high-strength cloth and fixed on the top steel plate via bolt; the whole integrated elements can control the plane position and height of top steel plates via special device to fill underwater concrete in the module bag to form base, while the module bags of basic bottom can naturally adhere with the dig surface; when the base has reached preset strength, the pipe is directly laid on the base to fix the pipe via limit device. The invention has the advantage that the pipe is directly laid on the basic top surface to avoid the process of sticking the pipe bottom with the basic top surface and the limit device can improve its stability.

Description

technical field [0001] The invention relates to a bagged concrete limiting foundation structure of an immersed tube tunnel, in particular to a bagged concrete limiting foundation structure applied in immersed tunnel engineering. Background technique [0002] In the current immersed tunnel engineering, in order to closely connect the bottom of the pipe to the top of the pile, the main methods used are adjustable pile top method, pile cap method and grouting bag method. The Köhven Tunnel and Zeberg Tunnel in the Netherlands and the Rotterdam Metro Tunnel in the Netherlands all adopt the adjustable pile top method. This method is to set a small section of prefabricated concrete movable pile top on the top of all foundation piles. , pour cement mortar into the cavity between the top of the movable pile and the pile body until the top of the movable pile is raised to be in close contact with the bottom of the pipe. The above method requires divers to carry out the grouting const...

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Problems solved by technology

[0003] In the above method, in order to realize the force transmission between the bottom of the pipe and the top of the pile, the construction is divided into two steps. The pile sinking construction is carried out before the pipe section is laid down, and the pile top is processed. The grout realizes the close contact between the bottom of the pipe and the top of the pile, and the construction process is relatively complicated; at the same time, it is difficult to accurately control the grouting pressure during the grouting construction, so that the pressure can ensure that the gap is filled densely without lifting the pipe section

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