Height-adjustable prefabricated box culvert and adjustment method thereof

Abstract

The invention provides a height-adjustable prefabricated box culvert and an adjustment method thereof. The height-adjustable prefabricated box culvert comprises a height-adjusting rod disposed on theside wall of the prefabricated box culvert, at least one embedded nut arranged in a row and disposed on the side wall surface of the prefabricated box culvert and bolts penetrating first threaded rodsto be fastened in the embedded nuts, wherein the height-adjusting rod is provided with the at least two first threaded holes arranged in a row; and the embedded nuts are matched with the first threaded holes. By causing the bolts to penetrate the first threaded holes at different positions and be fastened to the embedded nuts, the goal of adjusting the height of the prefabricated box culvert is achieved, and thus the influence of a cumulative construction error of to-be-installed prefabricated box culvert position on the top surface height of the prefabricated box culvert is reduced. The goalof accurately controlling the distance between the top surface of the prefabricated box culvert and a designed road surface / track surface is achieved, so that the inner diameter of a shield tunnel isoptimized, to achieve the goal of saving investment and reducing the construction difficulty.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a height-adjustable prefabricated box culvert and an adjustment method thereof. Background technique [0002] Box culverts refer to culverts built with reinforced concrete box-shaped pipe joints. Box culverts consist of one or more square or rectangular sections, generally made of reinforced concrete or masonry, but reinforced concrete is widely used. When the span is less than 4m, box culverts are used. For pipe culverts, reinforced concrete box culverts are An inexpensive alternative, the piers, upper and lower slabs are all poured in unison. General box culverts include cast-in-place side box culverts and intermediate prefabricated box culverts, the intermediate prefabricated box culverts are composed of a flat top plate 41, a flat plate side wall 42 and a standard curved bottom plate 43, such as figure 1 shown. [0003] At present, in the construction process of l...

AI Technical Summary

Problems solved by technology

[0004] However, if the prefabricated box culvert 4 is directly placed on the segment lining 1, the axis deviation of the shield excavation, the staggered assembly of the segment, and the deviation caused by the force deformation at the bottom of the segment will be directly transmitted to the prefabricated box culvert 4 The top surface 41 of the prefabricated box culvert thus causes the distance H (H=h1+h2) between the top surface 41 of the prefabricated box culvert and the designed road surface / rail surface 3 to decrease or increase

Therefore, in order to meet the requirement that the height of the structural layer of the road surface or rail surface 3 is not less than the design value h2, an additional thickness h1 must be reserved.

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