Construction method of middle partition of urban underground comprehensive pipe gallery

Abstract

The invention relates to the field of tunnels and underground engineering, in particular to a construction method of a middle partition of an urban underground comprehensive pipe gallery. The construction method of the middle partition of the urban underground comprehensive pipe gallery includes the following steps that S1, side beam brackets are constructed; and S2, the middle partition is transported and mounted. S1 includes the steps of S1.1, a movable working platform is arranged; S1.2, concrete formworks are arranged; S1.3, a concrete tank car is refit; S1.4, the side beam brackets are cast in place; and S1.5, concrete curing is carried out. S2 includes the steps that S2.1, a temporary bridge is built, wherein the temporary bridge is a steel structure component; S2.2, the middle partition is transported; and S2.3, the middle partition is mounted in place. The construction method is pertinently designed as for various problems in the mounting process of the middle partition of a shield tunnel, construction manners of a single equipment device are integrated and optimized into a set of continuous construction procedures, it is guaranteed that all the procedures are smoothly carried out, all the procedures in construction of the shield tunnel have the possibility of simultaneous execution, the construction total period is shortened while the construction quality is guaranteed, and the operation potential safety hazards are overcome.

Description

technical field [0001] The invention relates to the field of tunnels and underground engineering, in particular to a method for constructing partitions in urban underground comprehensive utility corridors. Background technique [0002] The construction of shield prefabricated assembled segment tunnel is a relatively advanced construction method in the field of tunnel and underground engineering. The existing shield prefabricated assembled segment tunnel has an outer diameter of 6m and an inner diameter of 5.4m. A middle partition needs to be installed at a height of about 2.7m in the middle of the end face, and is constructed by using cast-in-place edge beams and laying a prefabricated middle partition. The middle partition divides the tunnel into an upper cabin and a lower cabin, and each middle partition weighs about 3.8 tons , it needs to be transported from the outside of the pipe gallery to the tunnel for installation through the working hole. [0003] However, since t...

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Problems solved by technology

[0003] However, since there is no perfect and unified construction method for the installation of the prefabricated partition in the shield assembled segment tunnel, many difficulties have been encountered in the installation process of the existing partition, mainly including: (1) due to the The internal space of the ring segment is narrow, and the inner base of the tunnel is only 1.82m wide. It is extremely inconvenient to transport the heavy and bulky prefabricated middle partition, and it is easy to cause a large pressure on the ring segment due to the wheels of the transport mechanism. , damage the internal segment of the pipe gallery; (2) There is a height difference of about 1m between the foundation pit at the bottom of the working well and the bottom of the tunnel. , making it very difficult to transport related materials and equipment from the working shaft to the tunnel; (3) Before laying the middle partition, it is necessary to carry out the construction of side beams, corbels, foundations, etc., and the construction site is about 2.7 meters away from the bottom of the tunnel. m, belongs to high-altitude operations, and requires the construction of a working platform. The construction process is complicated, and after the working platform is built, it will directly block the normal transportation of other tunnel construction process-related equipment in the tunnel, affecting the smooth movement of operators and affecting other processes. (4) The long-distance pumping of concrete for side beam cast-in-place makes it difficult to guarantee the quality of the concrete; these difficulties lead to the installation of the existing prefabricated partition in the shield segment segment tunnel. The process is complicated, the construction is difficult, and it cannot be completed in cooperation with other processes, which not only prolongs the overall construction period of the project, cannot meet the requirements of the existing construction period, but also easily causes certain hidden dangers to operational safety

[0004] To sum up, there is an urgent need for a technical solution to solve the problem that there is still no perfect and unified construction method for the installation of the existing prefabricated central partition in the shield assembled segment tunnel, and many difficulties are encountered during the installation process, which cannot meet the requirements The requirements of the existing construction period, and the technical problems that are likely to cause certain hidden safety hazards

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