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Construction method for lower storey adding of existing building

A construction method and a technology of existing buildings, which are applied in construction, earthwork drilling, underground chambers, etc., can solve problems such as easy downward settlement, reduce the probability of downward settlement, improve safety, and ensure stability Effect

Pending Publication Date: 2021-07-13
CHINA RAILWAY SHISIJU GROUP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a construction method for adding floors under existing buildings, so as to solve the problem that existing buildings in the prior art are easy to settle downwards

Method used

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  • Construction method for lower storey adding of existing building
  • Construction method for lower storey adding of existing building
  • Construction method for lower storey adding of existing building

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Embodiment Construction

[0047] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0048] Such as Figure 1 to Figure 4 As shown, a kind of construction method of adding floors under the existing building of the present embodiment comprises:

[0049] Step S10: Form a plurality of first pilot tunnels 10 under the existing building, set side pilot tunnel initial support 50 in the side pilot tunnels 11 of the multiple first pilot tunnels 10, and set up side pilot tunnel initial support 50 in the side pilot tunnel initial support Dig the side pile holes downward within 50, and install the side pile reinforcement cages in the side pile holes;

[0050] Step S20: installing the first embedded part 30 above the side pile reinforcement cage, the first embedded part 30 includes a con...

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Abstract

The invention provides a construction method for lower storey adding of an existing building. The construction method comprises the steps that S10, a plurality of first pilot tunnels are formed below the existing building; S20, a first embedded part is installed above a side pile reinforcement cage; S30, the side pile reinforcement cage and the connecting section of the first embedded part are poured to form a side pile, and the mounting section of the first embedded part is exposed out of the side pile; S40, a first lead screw is mounted on the mounting section of each first embedded part; S50, leveling treatment is conducted on the inner surface of the top wall of a side pilot tunnel primary support; S60, a first supporting beam is installed on the top wall of the side pilot tunnel primary support; S70, a first axial force meter is arranged between the first supporting beam and the first lead screw; and S80, the first lead screw is adjusted so that the numerical value of the first axial force meter can be kept within the first preset range. According to the construction method, the problem that in the prior art, an existing building is prone to settling downwards can be effectively solved.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a construction method for adding floors under an existing building. Background technique [0002] At present, in the process of tunnel excavation, the situation that the tunnel needs to pass through the existing buildings will be encountered, especially in the process of subway tunnel excavation, it is often encountered that it is necessary to dig a new tunnel under the already dug tunnel, so as to This forms the hub station of the transfer line. At this time, the tunnel that has been dug is the existing building, and the tunnel that needs to be newly excavated becomes the lower layer of the existing building. During the construction of the lower storey, the settlement of the existing building needs to be strictly controlled. At present, advance grouting is generally carried out before the excavation of the pilot tunnel of the lower storey, and the initial support is carried o...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/14E21D11/00E21D11/15E02D5/34
CPCE21D9/00E21D9/14E21D11/003E21D11/15E21D9/003E02D5/34
Inventor 雷升祥王志康丁正全王华伟李秀东张志伟郑凯梁华华郗吉庆刘国龙
Owner CHINA RAILWAY SHISIJU GROUP CORP
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