Construction method for pouring bearing platform by adopting reverse mounting form boards in narrow space

A construction method and technology in space, applied in construction, infrastructure engineering and other directions, can solve the problems of affecting traffic, large damage to existing roads, large excavation size of foundation pits, etc., to reduce the number of use, save resources, compress Effect of excavation size

Inactive Publication Date: 2020-10-27
CCCC SHEC FIRST HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing road damage range is large and the excavation size of the foundation pit is large, which seriously affects the traffic existing in the traditional platform cap construction method.

Method used

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  • Construction method for pouring bearing platform by adopting reverse mounting form boards in narrow space
  • Construction method for pouring bearing platform by adopting reverse mounting form boards in narrow space
  • Construction method for pouring bearing platform by adopting reverse mounting form boards in narrow space

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Experimental program
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Effect test

Embodiment 1

[0033] In order to solve the problem that the traditional caps construction method has a large damage range to the existing roads and a large excavation size of the foundation pit, which seriously affects the traffic, the present invention provides a construction method of pouring caps using reverse formwork in a narrow space methods such as figure 1 shown, including the following steps:

[0034] Step 101: Excavation of foundation pit

[0035] Such as figure 2 and Figure 4 As shown, the excavation depth, slope and excavation point of the foundation pit 1 are designed according to the size of the cap, and the excavator is used as the main force and the labor is supplemented. 3. Install purlins and supports 4 in the enclosure surrounded by steel sheet piles 3, and the lowest point of the supports is higher than the elevation of the top surface of the cap;

[0036] Excavate the foundation pit 1 to the design elevation, arrange at least one sump at the corner of the foundati...

Embodiment 2

[0050] On the basis of Example 1, concrete is poured into the back-shaped cavity formed by the steel formwork 8 and the steel sheet pile 3 as described in step five, and the poured concrete is plain concrete, and the grade of plain concrete is not higher than that of the cap concrete label.

[0051] Specifically, plain concrete is a structure made of concrete without reinforcement or without reinforced reinforcement. Since the cap is to bear the load transmitted by the pier body, the strength requirements for the concrete are higher than those for the concrete formwork 8 .

Embodiment 3

[0053] In particular, the inner edge of the back-shaped concrete enclosure described in step five is the outer edge of the cap. What needs to be specially explained here is that the back-shaped concrete enclosure surrounded by the concrete formwork 5 is similar to the steel formwork in the traditional platform construction method. The difference is that in this embodiment, the inner edge of the back-shaped concrete enclosure is used as the outer edge of the cap to replace the traditional steel form 8, which avoids the removal of the steel form after the cap is poured , there is no need to reserve the demolition space of the steel formwork, thereby compressing the excavation size of the foundation pit, reducing the scope of damage to the existing roads, thereby reducing the number of steel sheet piles used, saving resources, and having high economic efficiency .

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Abstract

The invention provides a construction method for pouring a bearing platform by adopting reverse mounting form boards in narrow space. Compared with the traditional manner that steel form boards are used as the outer edge of a bearing platform and certain operation space needs to be reserved to be used for mounting and dismounting the steel form boards, in the method, concrete form boards formed through pouring are adopted for replacing the traditional steel form boards to be used as the outer edge of a poured steel reinforcement cage of the bearing platform, due to the fact that the steel formboards are already dismounted before pouring of the steel reinforcement cage of the bearing platform, the dismounting space for the steel form boards does not need to be reserved, then the excavationsize of foundation pits is compressed, the destroy range to existing roads is reduced, and therefore the number of adopted steel plate piles is reduced, resources are saved, and higher efficiency isachieved. In addition, the steel form boards are already dismounted before pouring of the steel reinforcement cage of the bearing platform, compared with the traditional bearing platform constructionmethod, the space for dismounting of the steel form boards is larger and more convenient and rapider to use, and the transfer efficiency of the steel form boards is improved.

Description

technical field [0001] The invention belongs to the technical field of cap construction, and in particular relates to a construction method for pouring a cap in a narrow space using a reverse formwork, in particular to a construction method for pouring a cap in a narrow space using a reverse formwork to form a concrete formwork in conjunction with steel sheet piles method. Background technique [0002] The cap is used to bear and distribute the load transmitted by the pier body, and the reinforced concrete platform set on the top of the foundation pile to connect the pile tops is especially important. The traditional cap construction method mainly adopts the method of determining the position of the steel sheet pile enclosure by the operating space of the cap. This construction method is especially suitable for projects with open sites and less strict requirements on the site, but for narrow sites, especially around foundation pits It is a passable road or building, and at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/14E02D15/02
CPCE02D15/02E02D27/14
Inventor 王鑫祝新顺石山
Owner CCCC SHEC FIRST HIGHWAY ENG
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