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A Method for Determining Tensile Strength of Vertical Geogrid of Anti-heave Composite Reinforced Pile

A geogrid and determination method technology, applied in soil protection, infrastructure engineering, computer-aided design, etc., can solve the problem of how to determine the tensile force of vertical geogrid, achieve convenient implementation, adapt to engineering design and Construction needs, the effect of clear process

Active Publication Date: 2022-03-25
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practical application, the structure mainly uses the tensile force of the vertical geogrid to achieve the anti-uplift function, but how to determine the tensile force of the vertical geogrid, there is no reasonable method at present

Method used

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  • A Method for Determining Tensile Strength of Vertical Geogrid of Anti-heave Composite Reinforced Pile
  • A Method for Determining Tensile Strength of Vertical Geogrid of Anti-heave Composite Reinforced Pile
  • A Method for Determining Tensile Strength of Vertical Geogrid of Anti-heave Composite Reinforced Pile

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Embodiment

[0025] refer to figure 1 , the filling height of a ballastless track subgrade M of the Yungui (Kunming-Nanning) railway is 1.90m, the width of the top surface of the subgrade M on the expansive soil subgrade D is 13.4m, and the slope ratio of the subgrade M is 1:1.5. The expansive soil foundation D at the bottom of the subgrade M has a moderate-strong expansion potential, and the uplift and deformation of the base can easily lead to the upward displacement of the top surface of the ballastless track subgrade M, resulting in aggravated line irregularities and affecting the normal operation of high-speed trains.

[0026] In order to control the uplift of the expansive soil foundation D, the composite reinforced pile Z is proposed to be used for anti-uplift reinforcement. The diameter of the composite reinforced pile Z is 0.5m, and the number n of vertical geogrids 1 is 40. The tensile strength of the vertical geogrid 1 of the composite reinforced pile Z is determined, and the sp...

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Abstract

A method for determining the tensile force of a vertical geogrid of an anti-heave composite reinforced pile is used to scientifically and rationally determine the tensile force of a vertical geogrid of a composite reinforced pile under the action of foundation uplift, which meets the needs of engineering design and construction. Including the following steps: (1) Determining the "neutral point" depth l 0 , unit m, determine the upward tangential force f generated on the side surface of the composite reinforced pile after the i-th layer of soil above the "neutral point" is uplifted i (2) Determine the tensile force T of the vertical geogrid of the composite reinforced pile by the following formula d :

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering pile foundations, in particular to a method for determining the tensile strength of a vertical geogrid of an anti-uplift composite reinforced pile. [0002] technical background [0003] In recent years, a new uplift problem has been discovered during the operation of high-speed railways, that is, the uplift deformation of the foundation at the bottom of the geotechnical structure. The uplift and deformation of the foundation is very harmful, and it is easy to cause the cracking of the ballastless track slab of the high-speed railway, causing major ballastless track diseases, and even endangering the safety of high-speed trains, especially the low embankment or cutting bed of the ballastless track. The traditional reinforced concrete pile foundation is one of the effective methods to resist the uplift of the foundation, but its steel consumables are large and the engineering cost i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13E02D3/00
CPCE02D3/00G06F30/13G06F2119/06
Inventor 陈伟志李安洪姚裕春曾永红龚建辉吴沛沛胡会星郭在旭王德军葛学军陈裕刚秦谢宇姚昊宇林东升叶丹朱建辉
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD