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Method for removing reinforced concrete support beams in foundation pit support

A reinforced concrete and foundation pit support technology, applied in excavation, infrastructure engineering, construction, etc., can solve the problems of huge impact on the surrounding environment, long construction period, large labor cost, etc., to shorten the construction period, low demolition cost, Fast construction effect

Inactive Publication Date: 2015-03-11
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is a more commonly used method at present. It is demolished by manual combination of pneumatic picks and other machinery. The noise during the construction process has a huge impact on the surrounding environment, the labor cost is large, the construction period is long, and there is a greater safety hazard.

Method used

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  • Method for removing reinforced concrete support beams in foundation pit support
  • Method for removing reinforced concrete support beams in foundation pit support

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 As shown, the reinforced concrete support beam removal method in the foundation pit support includes the following steps:

[0028] 1) Reserve expansion holes

[0029] The pre-buried vertical expansion holes are constructed simultaneously with the pouring of concrete. When pouring the support beam 1 of the foundation pit, the PVC pipe with a hole diameter of 40mm is embedded in the reinforced concrete, and it is 30-50mm higher than the surface of the support beam, and the upper port is filled with silk to prevent the PVC pipe from entering other substance. Each of the PVC pipes is required to be perpendicular to the upper and lower surfaces of the support beams, and pre-embedded PVC pipes need to arrange special personnel to correct the pre-embedded pipes to ensure the verticality of each hole. And each of the PVC pi...

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Abstract

The invention relates to a method for removing reinforced concrete support beams in a foundation pit support. The method is characterized by comprising the following steps: preserving expansion holes in the support beams, cutting two slots in each support beam before removing the support beams, and cutting off stirrups on the upper parts of the support beams; finishing the actions of preparing a blasting agent, stirring uniformly and pouring into each expansion hole within specified time, controlling the temperature of the blasting agent at 10-30 DEG C, standing for 24 hours, performing simple crushing on the support beams, manually cutting off steel bars in the support beams after crushing of the support beams, and cleaning and transporting waste residues left after crushing of the support beams. The method has the characteristics of safety, rapidness in construction, freeness from vibration and flying rocks, low noise, easiness in operation, and the like; the removing construction period of the support beams in the foundation pit support can be effectively shortened, the economic input is reduced greatly, and the method has important significance to engineering construction.

Description

technical field [0001] The invention relates to the construction field, in particular to a method for removing reinforced concrete support beams in foundation pit support. Background technique [0002] At present, underground engineering is involved in civil engineering, especially modern public buildings and residential buildings basically contain basements. The soft soil foundation in coastal areas is generally dominated by silt or silty soil, which has a large liquid index, is in a flow-plastic state, has low shear strength, high compressibility, and low permeability. For this type of foundation, the foundation pit excavation of basement engineering and the construction of the basement structure need to be designed and constructed for the foundation pit support. The support setting usually includes internally supported reinforced concrete beams, which are placed between the basement excavation and the bottom slab. It needs to be demolished after construction is completed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02
CPCE02D17/02
Inventor 马惠彪
Owner ZHEJIANG OCEAN UNIV
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