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Section steel support composite splayed system for deep foundation pit

A technology of compound eight-character and deep foundation pits, which is applied in basic structure engineering, excavation, construction, etc., can solve the problems of small construction space under the support, difficult to deploy construction equipment, and narrow construction work surface, etc., to achieve multiple operating radius and save labor , the effect of multi-steel usage

Pending Publication Date: 2020-08-18
DONGTONG ROCK SOIL SCI & TECH HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in narrow foundation pits such as subway station foundation pits, the construction space is narrow. If column piles are installed, the construction space under the support will be narrower, making it difficult for construction machines to deploy.
The arrangement of too many columns will cause the construction work area to be narrow and narrow, which will cause obstacles for larger construction auxiliary equipment.

Method used

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  • Section steel support composite splayed system for deep foundation pit
  • Section steel support composite splayed system for deep foundation pit
  • Section steel support composite splayed system for deep foundation pit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] like Figure 1 to Figure 7 As shown in the figure, the deep foundation pit is supported with a composite eight-character system by a profiled steel, including a central profiled steel inner support girder 1 and an outer purlin beam 2, and both ends of the profiled steel inner support main beam 1 are provided with multi-triangular joint members 3. The outer side of the multi-triangular joint member 3 is provided with a composite figure-eight inclined support structure 4 , and the outer side of the composite figure-eight inclined support structure 4 is provided with the surrounding purlin beam 2 .

[0049] The section steel inner supporting main beam 1 in the middle is mainly formed by connecting I-shaped steel or H-shaped steel. Through the deep foundation pit support composite eight-shaped system designed by this application, the number of section steels that can be accommodated by one section steel inner supporting main beam 1, There can be up to 16 sections of steel, ...

Embodiment 2

[0056] see Image 6 , or the inner sleeve slanted beam 431 is pressed against both sides of the middle auxiliary support sub-beam 422 through the inner sleeve auxiliary triangular piece 432 to form an inner sleeve triangular support, and the outer end of the inner sleeve slanted beam 431 passes through the inner sleeve The auxiliary triangular piece 432 is fixedly connected to the inner side surface of the purlin beam 2 .

Embodiment 3

[0058] see Figure 7 , the inner sleeve slanted beam 431 is pressed against the two sides of the middle auxiliary supporting main beam 421 through the inner sleeve auxiliary triangular piece 432 to form an inner sleeve triangular support, and the outer end of the inner sleeve slanted beam 431 is supported by the inner sleeve. The triangular piece 432 is fixedly connected to the inner surface of the purlin beam 2 .

[0059] In order to adapt to various scenarios of foundation pit operations, according to the width of the foundation pit, the inner sleeve slanted beam assemblies 43 of the above three embodiments can be implemented.

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Abstract

The invention discloses a section steel support composite splayed system for a deep foundation pit. The section steel support composite splayed system comprises a section steel inner support main beaminside and a surrounding purlin beam at the outer side, multi-triangular combined members are arranged at the two ends of the section steel inner support main beam, a composite octagonal inclined support structure is arranged on the outer side of each multi-triangular combined member; and surrounding purlin beams are arranged outside the composite octagonal inclined support structure; a compositesplayed system can expand the net space between supports and bring more operation radius to earthwork operation and main structure construction operation. The net space provided by the system is twoto three times that of the traditional splayed support; and in controlling the soil pressure with the same horizontal distance, because the axial calculation length of the counter support of the composite splayed support system is shorter, the stability is higher, and more steel use amount can be saved.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a profiled steel supporting composite eight-character system for deep foundation pits. Background technique [0002] In order to ensure the safety of the underground structure and the surrounding environment of the foundation pit, it is necessary to adopt protective measures such as support and reinforcement on and around the sidewall of the foundation pit. Existing foundation pit support systems generally include foundation pit enclosure piles arranged around the edge of the foundation pit, enclosure beams located inside the foundation pit enclosure piles, and support in the foundation pit arranged between the enclosure beams. The inner support of the foundation pit usually includes a triangular piece fixed on the inner side of the enclosing beam and a section steel inner support beam supported between the enclosing beams through the triangle piece. Between the purlin beams, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 胡琦朱海娣竹相邓以亮徐晓斌黄星迪黄天明
Owner DONGTONG ROCK SOIL SCI & TECH HANGZHOU
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