Urban undercrossing tunnel prefabricating construction method and prefabricating assembling and tunneling machine

Abstract

The invention provides an urban undercrossing tunnel prefabricating construction method and a prefabricated and assembled tunneling machine. The urban undercrossing tunnel prefabricating constructionmethod comprises the steps that a whole undercrossing tunnel is divided into a first half-width part and a second half-width part, wherein a frame section middle wall is located at the firstly constructed half-width part; after a shallow ship groove section of the first half-width part is constructed, a deep ship groove section, a frame section and a deep ship groove section at the other end are sequentially constructed by the prefabricated and assembled tunneling machine; after the first half-width part of the undercrossing tunnel is constructed, the second half-width part of the undercrossing tunnel is constructed by the prefabricated and assembled tunneling machine; and through the steps, urban undercrossing tunnel prefabricating construction is achieved. The prefabricated and assembledtunneling machine comprises a first half-width part tunneling machine body and a second half-width part tunneling machine body; a tunneling bin is arranged on the front portion of the prefabricated and assembled tunneling machine, and an assembling bin is arranged on the rear portion of the prefabricated and assembled tunneling machine; and a soil retaining plate is arranged on one side of a pushing box girder of the second half-width part tunneling machine body, and a truncated soil retaining plate is arranged on the other side of the pushing box girder of the second half-width part tunneling machine body. According to the width-dividing construction scheme, pavement occupation can be reduced, traffic congestion is reduced, construction refining is achieved through the optimized movableprefabricated and assembled tunneling machine, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the construction field of prefabricated and assembled structures, in particular to a prefabricated and assembled construction method for urban underpass tunnels and a prefabricated and assembled tunnel boring machine. Background technique [0002] With the development of the economy, the number of urban vehicles is increasing explosively. In a certain period of time and in a certain area, the existing traffic environment network cannot meet the needs of urban development, resulting in traffic congestion. In order to solve this problem, more and more three-dimensional traffic forms are adopted on the nodes of urban arterial roads, and the space of different levels of the city is rationally used, and viaducts or tunnels under the city are set up more. Compared with viaducts or other methods, underpass tunnels have the advantages of undisturbed motor vehicles, fast passage, the ground retains the original function of traffic trans...

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Problems solved by technology

Chinese patent document CN 107653890 A records a mobile support structure for passing through tunnels, which can be used for excavation construction of passing through tunnels, and has short construction time and narrow road occupation, but the control of the guide plate device of this structure is relatively difficult. The main performance is that the transmission structure of the guide plate makes it difficult to maintain the angle

In the actual construction process, there is still the problem that the retaining board interferes with the assembly of prefabricated components, which affects the assembly construction on site

When there is an uneven soil layer under the ground, such as the geological conditions where the original soil layer, hard rock and backfill concrete coexist, the excavation accuracy and efficiency are low

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