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Integral hoisting method of multi-layer reinforced concrete inner support beam in deep foundation pit with segmental cutting

A technology of reinforced concrete and supporting beams, which is applied in the direction of excavation, foundation structure engineering, foundation structure test, etc., to achieve the effect of speeding up the construction rhythm, improving cutting ability and labor productivity, and shortening the cleaning time

Active Publication Date: 2014-10-29
何金城
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the demolition of multi-storey internal support beams often uses the constructed underground horizontal structure as a construction platform, which poses a higher challenge to the demolition method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] A method for segmentally cutting and overall hoisting of a multi-layer reinforced concrete inner support beam in a deep foundation pit, characterized in that it includes the following steps:

[0041] (1) Internal force monitoring

[0042] Internal force monitoring is carried out before removing the internal support structure and during the entire demolition process. First, the displacement of the foundation pit and the internal force of the internal support beam are monitored. According to the test results, the internal force distribution is obtained, and the unloading is uniformly unloaded according to the internal force distribution;

[0043] During the demolition process, focus on monitoring the following parts:

[0044] (1) Groundwater level monitoring outside the pit: use a steel ruler water level gauge to monitor in the pre-arranged water level observation well;

[0045] ⑵Land subsidence monitoring: use the level and scale to monitor on the arranged base points, ...

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Abstract

The invention discloses a sectional cutting and overall craning method for a supporting beam in deep foundation pit multilayered reinforced concrete. The method comprises the steps of internal force measurement, cutting and dismantling, transferring in the foundation pit, entirely craning of the supporting beam, off-site crushing of the supporting beam and the like. The method is to construct on an underground horizontal thin slab structure without special requirement on the construction platform. A steel pipe supporting system of the underground thin slab structure is not required to be reinforced, but holes and expansion joint positions are reserved for the underground horizontal thin slab to be locally reinforced. When the supporting beam is cut off and dismantled, the steel pipe stand is not required for the lower part. The single input of the steel pipe stand material is greatly reduced on the site, and the steel pipe stand can be dismantled in advance to improve the turnover rate of the steel pipe stand.

Description

technical field [0001] The invention relates to a method for segmentally cutting and overall hoisting of a multi-layer reinforced concrete inner support beam in a deep foundation pit. Background technique [0002] In recent years, with the rapid development of cities and the growth of population density, urban buildings have been developing towards high and deep. High-rise buildings have become the main theme of urban construction. The engineering is often adjacent to high-rise buildings or underground structures, etc. The complexity of the surrounding environment of the building restricts the use of anchor bolt and cable support systems for foundation pits. It has been widely used, especially in reinforced concrete inner support, which greatly improves the stability of deep foundation pits. And as the underground depth increases, the number of layers of inner support also increases from one-layer support to multi-layer support. [0003] Commonly used concrete support beam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/02E02D33/00
Inventor 何金城
Owner 何金城
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