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Standardized and extensible fabricated foundation pit inner supporting system

A support system and prefabricated technology, applied in infrastructure engineering, excavation, construction, etc., can solve the problems of inconvenient disassembly of concrete foundation pit supports, inconvenient reuse of H-beams, poor expansion of round steel pipe supports, etc., and achieve good application prospects, The effect of high excavation efficiency and large vertical support spacing

Pending Publication Date: 2020-05-19
SHENZHEN YJY BUILDING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a standardized and expandable prefabricated support system in the foundation pit to solve the problems of inconvenient disassembly of concrete foundation pit support, long construction period, poor expandability of round steel pipe support, inconvenient reuse or H-shaped steel in the prior art. Support technical problems such as low bearing capacity

Method used

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  • Standardized and extensible fabricated foundation pit inner supporting system
  • Standardized and extensible fabricated foundation pit inner supporting system
  • Standardized and extensible fabricated foundation pit inner supporting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Such as Figure 1-2 As shown, this embodiment provides a standardized and expandable prefabricated support system in the foundation pit, including several support columns 100; adjacent support columns 100 are directly connected or connected through intermediate connectors;

[0070] The support column 100 is composed of one or several cross-shaped column sections 110;

[0071] The cross-shaped column section 110 includes: a pipe body 120, a T-shaped steel 130, an upper end plate 150 and a lower end plate 140;

[0072] Four T-shaped steels 130 are evenly arranged in the circumferential direction of the pipe body 120 in a cross shape;

[0073] The T-shaped steel 130 includes a web 131 and a flange 132 ; both ends of the web 131 are fixedly connected to the flange 132 and the outer wall of the pipe body 120 respectively; the flange 132 is provided with a plurality of connection holes.

[0074] The upper end plate 150 and the lower end plate 140 are respectively arranged o...

Embodiment 2

[0088] This embodiment is basically the same as Embodiment 1, the difference is:

[0089] The intermediate connector is a restraint support, such as Figure 13 As shown, both ends of the constraining support member 60 are respectively fixedly connected to the outer flanges of two adjacent support columns 100 .

[0090] Such as Figure 14 As shown, the constraining support 60 includes an outer constraining sleeve 61 and an inner core 62 , a constraining ring 63 and a constraining rod 64 all disposed in the outer constraining sleeve.

[0091] The restraint rod 64 and the inner core 62 are all arranged along the length direction of the outer restraint sleeve, and the restraint ring 63 is fixed to the outer restraint sleeve, and is sleeved outside the inner core 62 and the restraint rod 64 to fix the inner core 62 and the restraint rod 64 .

[0092] As shown in 14, the inner core 62 is in the shape of a strip; both sides of the inner core 62 are provided with restraining rods 6...

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Abstract

The invention provides a standardized and extensible fabricated foundation pit inner supporting system. The supporting system comprises multiple supporting columns. Each supporting column is composedof one or more cross column joints. Each cross column joint comprises a pipe body, T type steel, an upper end plate and a lower end plate, wherein the four pieces of T type steel are evenly arranged on the circumference of the pipe body in a cross manner. The T type steel comprises webs and flanges. The two ends of the webs are fixedly connected with the flanges and the outer walls of the pipe bodies correspondingly. Multiple connecting holes are formed in the flanges. The fabricated foundation pit inner supporting system has the beneficial effects of being high in standardization degree, easyand convenient to machine, extensible, high in adaptability, capable of being detached and reused, good in force bearing performance, high in strength and rigidity, small in steel consumption, high in supporting rigidity, large in vertical supporting interval, high in soil excavating efficiency, high in construction speed and the like, and has good application prospects in a foundation pit supporting structure.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a standardized and expandable assembled foundation pit internal support system. Background technique [0002] With the development of my country's urbanization process, the scale of urban underground space development is increasing. For example, in the Qianhai area of ​​Shenzhen, the underground space development area has reached 6.3 million square meters, and the excavation depth of foundation pits has reached 32.5 meters. Due to the characteristics of excavation scale and excavation depth becoming larger and deeper, the surrounding environment is complex and sensitive, and underground pipelines are complicated, the consequences of excessive deformation and damage of foundation pits are becoming more and more serious. The requirements for pit safety construction are getting higher and higher, and the construction support technology of foundation pit engineering ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 龚超侯兆新梁伟桥吴旭君曹文昭
Owner SHENZHEN YJY BUILDING TECH