Freezing reinforcement simulation test method and freezing reinforcement simulation test device suitable for shield ground butt joint

Abstract

The invention discloses a freezing reinforcement simulation test method suitable for shield ground butt joint. According to the method, a first shield tunneling machine model and a second shield tunneling machine model are arranged, and the method comprises the following steps of: (1) excavating a frozen earth test box underground; (2) respectively arranging a plurality of freezing pipes on shells of the two shield tunneling machine models; (3) respectively arranging a plurality of strain rosettes on the inner surfaces and the outer surfaces of the shells of the two shield tunneling machine models; (4) respectively welding at least one reinforcing steel bar on the shells of the two shield tunneling machine models, and arranging a soil mass pressure box and a temperature sensor on the reinforcing steel bar; (5) filling soil into the frozen earth test box, and carrying out soil consolidation; (6) connecting all the freezing pipes into a freezing pipeline by a freezing device; and (7) starting to freeze and acquiring and analyzing the data. The freezing reinforcement simulation test method is suitable for the freezing method construction simulation test of the shield ground butt joint, can be used for simulating the process of shield ground butt joint freezing method construction, and saves fund, manpower and time compared with the test using physical prototype.

Description

technical field [0001] The present invention relates to a test method, in particular to a freezing reinforcement simulation test method and device suitable for underground docking of shield tunnels. Background technique [0002] The construction methods of subway tunnels mainly include shield tunneling method, open cut method, mining method and so on. Among them, the shield method is a tunnel construction method that relies on the rigid support of the shield itself during the construction process, continuously uses the cutter head to excavate the soil, and performs segment assembly and grouting behind the wall at the tail of the shield. Because the shield method has the advantages of high degree of mechanization, fast construction speed and little disturbance to the surrounding environment, it has become a construction method used more in urban subway construction. [0003] In previous shield tunneling projects in China, each tunnel mostly used a shield tunneling machine, a...

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Problems solved by technology

[0005] Due to the fact that there are few reference cases for the design of shield tunneling in the ground, and the influencing factors involved in the shield tunneling project are also very complicated, there are certain limitations in the study of shield tunneling in the ground by theoretical analysis or numerical simulation.

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