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Support system and construction method for smoothening-digging partial center island foundation pit

A support system and local center technology, applied in infrastructure engineering, excavation, construction, etc., can solve the problems of increasing the difficulty of excavation, the large amount of steel used for steel trestles, and the impact of construction progress, so as to speed up the excavation speed and construction period The effect of reducing and saving construction time

Active Publication Date: 2008-10-29
SHANGHAI CONSTR NO 5 GRP CO LTD
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Problems solved by technology

[0002] At present, during the construction process in the construction field, foundation pit construction is often carried out in different areas according to the land plot and building characteristics. For the foundation pit support of large foundation pits, two horizontal supports are mainly used, but for deep foundation pits with a large area, two horizontal supports are used. The enclosure method of the first horizontal support increases the difficulty of earthwork excavation under the second support, and a steel trestle must be added. Due to the large area in the middle of the foundation pit, the steel consumption of the steel trestle is very large. Considering the construction period, not only Increase the cost of construction, and the construction schedule will be greatly affected

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  • Support system and construction method for smoothening-digging partial center island foundation pit
  • Support system and construction method for smoothening-digging partial center island foundation pit

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Embodiment Construction

[0017] Further illustrate the present invention below in conjunction with accompanying drawing.

[0018] figure 2 It is a specific embodiment of the present invention. Area B in the figure is the super-large-area deep foundation pit described in the present invention. Areas A and C are completed foundation pits located around Area B. A1 and C1 in the figure are completed foundation pits respectively. The outer walls of Area A and Area C around the foundation pit. Such as Figure 1~2 As shown, the foundation pit support system of the present invention, one level and one throw, includes a horizontal steel support 1, which uses the first reinforced concrete purlin 2 arranged around the foundation pit as a supporting purlin, and also includes a horizontal steel support 1, the throwing brace 3 arranged along the partial periphery of the foundation pit, the lower end of the throwing brace 3 abuts against the foundation pit floor 4 that has been excavated and poured, and the upper...

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Abstract

The invention discloses a system used for supporting a one-horizontal-strut and one-inclined-strut local mid-island foundation pit of a super large excavation, as well as the construction method thereof. The system comprises a horizontal steel strut which takes a first reinforced concrete purlin around the pit as a supporting purlin, and also comprises an inclined strut positioned at the inferior part of the horizontal steel strut and arranged along the local periphery of the foundation pit, the lower end of the inclined strut leans against on a foundation pit base plate which is subjected to excavation and concrete pouring, while the upper end leans against on a second reinforced concrete purlin arranged below the first reinforced concrete purlin, and a construction joint is arranged between the foundation pit base plate which is subjected to excavation and concrete pouring and a foundation pit which is unexcavated. The foundation pit supporting system as well as the construction method thereof provide a novel design idea for supporting the super large excavation, exerts the respective advantages of the support and the mid-island struts, reduces the earthwork construction difficulty under the second support, and also decreases the defects existing in the pure mid-island construction that too many overlong slopes exist.

Description

technical field [0001] The invention belongs to the technical field of building construction, and relates to a support system and a construction method for a foundation pit, in particular to a support system and a construction method for a one-flat-one-throw partial central island foundation pit for a super-large-area deep foundation pit. Background technique [0002] At present, during the construction process in the construction field, foundation pit construction is often carried out in different areas according to the land plot and building characteristics. For the foundation pit support of large foundation pits, two horizontal supports are mainly used, but for deep foundation pits with a large area, two horizontal supports are used. The enclosure method of the first horizontal support increases the difficulty of earthwork excavation under the second support, and a steel trestle must be added. Due to the large area in the middle of the foundation pit, the steel consumption...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D17/02
Inventor 毛子成张翼德丁利峰熊玎玮朱煜
Owner SHANGHAI CONSTR NO 5 GRP CO LTD
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