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A construction method for small-section shafts without removing formwork

A construction method and form removal-free technology, applied in the direction of vertical pipelines, buildings, building components, etc., can solve the problems of low work efficiency, cumbersome removal of formwork, and large safety hazards, so as to reduce safety hazards, facilitate quality control, The effect of speeding up the construction progress

Active Publication Date: 2020-05-05
SINOHYDRO BUREAU 8 CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this construction method, the dismantling of the support and the installation of the formwork during construction are both limited space operations, and the removal of the formwork after construction is cumbersome, with low work efficiency and great potential safety hazards

Method used

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  • A construction method for small-section shafts without removing formwork
  • A construction method for small-section shafts without removing formwork

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 and figure 2 As shown, the construction method of the small-section vertical shaft without removing formwork of the present embodiment prefabricates a plurality of annular thin-walled concrete inner molds 1 with a certain length, and the construction method of the small-section vertical shaft without removing the formwork includes the following steps:

[0027] S1: When pouring the next layer of mass concrete 2, determine the position of the shaft 3, and pre-embed the internal formwork positioning reinforcement 4;

[0028] S2: According to the pouring thickness of the mass concrete 2 of this layer, select a prefabricated circular thin-walled concrete inner mold 1 of corresponding length, hoist it to the position of the shaft 3, and use the inner mold positioning reinforcement 4 to position and reinforce it;

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Abstract

The invention discloses a construction method for a small-section vertical shaft without form removal. A plurality of annular thin-wall concrete internal molds of the certain length are manufactured in advance, and the construction method for the small-section vertical shaft without form removal comprises the following steps that S1, during next-layer large-size concrete pouring, the position of the vertical shaft is determined, and an internal mold positioning reinforcing piece is pre-embedded; S2, according to the current-layer large-size concrete pouring thickness, the pre-manufactured annular thin wall concrete internal mold of the corresponding length is selected and lifted to the position of the vertical shaft, the internal mold positioning reinforcing piece is used for positioning,and reinforcing is performed; S3, current-layer large-size concrete is poured, and the internal mold positioning reinforcing piece of the vertical shaft of the last layer is pre-embedded; S4, steps S2and S3 are repeatedly executed till vertical shaft construction is completed. The method has the advantages that no mold removal is performed inside the vertical shaft with the small space, the formremoval procedure is omitted, and the construction progress is greatly accelerated.

Description

technical field [0001] The invention relates to a construction method for a shaft in construction engineering, in particular to a construction method for a small-section shaft without removing formwork. Background technique [0002] In the mass concrete structure, various forms of small cross-section shafts are often reserved, and the internal space of the shaft is small. The construction of the existing shaft is mainly to reserve the shaft hole, make the shaft mold according to the size of the inner wall of the shaft hole, and pour Before the mass concrete, put the shaft mold into the shaft hole, and remove it after pouring the mass concrete. In this construction method, the dismantling of the support and the installation of the formwork during construction are limited space operations, and the dismantling of the formwork after construction is cumbersome, with low work efficiency and great potential safety hazards. Contents of the invention [0003] The technical problem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04F17/00
CPCE04F17/00
Inventor 田忠庆张培军卢大文樊传刚彭忠凡梁浩赵成林许长征杨康丁兰周丹纤
Owner SINOHYDRO BUREAU 8 CO LTD
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