A continuous foundation pit waist beam and its construction method

Abstract

The application relates to a continuous foundation pit waist beam and its construction method, belonging to the field of foundation pit side wall support, including multi-section steel waist beams anchored on the foundation pit side wall, and the multi-section steel waist beams are along the length direction of the foundation pit side wall Set up in sequence; concrete pouring body, the concrete pouring body is prefabricated on the side wall of the foundation pit, and the concrete pouring body is arranged between two adjacent sections of steel waist beams; connecting pieces, two sets of connecting pieces are set, and the two sets of connecting pieces are respectively detachable Between the concrete pouring body and the steel waist beam, to realize the connection of two adjacent steel waist beams; by setting the concrete pouring body between the two adjacent steel waist beams, and detachable connection between the concrete pouring Between the body and the steel waist beam, improve the integrity between the steel waist beam and improve the support effect of the waist beam; at the same time, it is convenient to remove the steel waist beam in the later stage to achieve the effect of temporary support for the foundation pit, and to ensure that when the waist beam is removed The purpose of improving the support effect of the waist beam on the side wall of the foundation pit under the premise of complete recovery of the waist beam.

Description

technical field [0001] The invention relates to the field of foundation pit side slope support, in particular to a continuous foundation pit waist beam and a construction method thereof. Background technique [0002] After the excavation of the foundation pit, the side slope of the foundation pit is loose due to the loose soil quality, which may easily lead to the collapse of the drawings of the foundation pit slope, and then cause safety accidents. In order to ensure the safety of the underground structure construction and the surrounding of the foundation pit, generally The perimeter is supported or reinforced. In the prior art, there are generally permanent foundation pit support and temporary foundation pit support. Temporary foundation pit support can generally be removed for later backfilling. Temporary foundation pit support generally adopts steel waist beams For support, the steel waist beam is generally drilled with multiple holes on the side wall of the foundation...

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Problems solved by technology

However, in the above drilling process, the construction workers may not be on a straight line due to measurement errors. Since the steel waist beam is a rigid structure, it is necessary to set the steel waist beam into multiple sections at this time, and the multi-section steel waist beam They are not on a straight line, but the integrity of this multi-section waist beam is poor, and its support effect on the side wall of the foundation pit will be greatly reduced

[0003] In order to improve the supporting effect of the steel waist beams, the prior art attempts to use intermediate steel connectors to be welded between multiple steel waist beams. Although this improves the overall support effect of the steel waist beams, when recycling the steel waist beams, It is necessary to cut off the welded parts one by one, which not only makes the steel waist beam a waste part that cannot be used again, but also takes time and effort to cut off the welded parts one by one, which is not conducive to the higher requirements of foundation pit slope support

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