Slidable inverted arch formwork and construction method thereof

Abstract

The invention discloses a slidable inverted arch formwork. The slidable inverted arch formwork comprises a middle formwork, side formworks located on the two sides of the middle formwork and a jackingframe used for jacking the middle formwork firstly and then jacking the side formworks, wherein the jacking frame is provided with a longitudinal rail arranged in the depth direction of an inverted arch; and the middle formwork can be slidably arranged on the longitudinal rail in a reciprocating mode along the longitudinal rail. The invention further discloses a construction method of the slidable inverted arch formwork. The construction method comprises the following steps that S1, the side formworks are fixed; S2, the middle formwork is hung; S3, the position of the middle formwork is adjusted; S4, pouring and moving of the middle formwork are conducted; S5, jacking of the middle formwork and surface treatment of the middle inverted arch are conducted; S6, jacking of the side formworksis conducted; and S7, overall moving is conducted. The slidable inverted arch formwork and the construction method thereof have the advantages that construction is convenient, the construction cost can be reduced, and the construction convenience and efficiency can be improved.

Description

technical field [0001] The invention relates to tunnel construction equipment, in particular to a slidable inverted arch template and a construction method thereof. Background technique [0002] In recent years, with the continuous development of tunnel construction technology in our country, in order to effectively improve the stability and durability of the inverted arch structure, a new understanding of the requirements for inverted arch construction has been obtained. The formwork for inverted arch construction is first optimized from a simple single block formwork to an integral low side wall inverted arch formwork driven by a trestle bridge, and then to a full-width inverted arch formwork with a full inverted arch section formwork. The tunnel invert layer is constructed with a full-width invert formwork, which increases the cost of the formwork and further reduces the construction space of the invert. During pouring construction, the invert layer is below the formwork ...

AI Technical Summary

Problems solved by technology

The tunnel invert layer is constructed with a full-width invert formwork, which increases the cost of the formwork and further reduces the construction space of the invert. During pouring construction, the invert layer is below the formwork and can only be poured and vibrated through the working window. Can't fully vibrate

In actual construction applications, air bubbles are likely to form on the surface of the final inverted arch concrete, and the layout of the full-width inverted arch formwork cannot be used for puree plastering and timely secondary cleaning on the surface of the inverted arch layer. The air bubbles affect the appearance of the inverted arch layer. , but also with certain security risks

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