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Reinforcing structure for high-speed railway, roadbed assembly, roadbed system and construction method

A technology for strengthening structures and high-speed railways, which is applied in the field of roadbed components, roadbed systems and construction, and high-speed railway reinforcement structures. It can solve the problems of insufficient overall stability of the reinforced structure and instability of the roadbed, so as to improve the anti-sliding damage ability and reduce the foundation. Weakness, the effect of reducing bending and tensile stress

Pending Publication Date: 2020-05-15
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: aim at the problems existing in the prior art that even if high-strength piles are used to reinforce low-strength soft soil foundations, sometimes the subgrade instability is caused by weak foundations and insufficient overall stability of the reinforced structure. It is used in high-speed railway reinforcement structures, subgrade components, subgrade systems and construction methods to improve the anti-slip damage ability of piles near slopes, thereby increasing the overall stability of low-strength soft soil foundation subgrades, and reducing low-strength soft soil foundations. Probability of subgrade instability caused by insufficient overall stability of reinforced structure

Method used

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  • Reinforcing structure for high-speed railway, roadbed assembly, roadbed system and construction method
  • Reinforcing structure for high-speed railway, roadbed assembly, roadbed system and construction method
  • Reinforcing structure for high-speed railway, roadbed assembly, roadbed system and construction method

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Effect test

Embodiment 1

[0053] Such as figure 1 , 2 As shown in and 4, a reinforcement structure for high-speed railways includes a first reinforcement pile foundation assembly 2, and a second reinforcement pile foundation assembly 3 is respectively arranged on both sides of the first reinforcement pile foundation assembly 2. The second reinforcement pile foundation assembly 3 includes a first support pile part 31 and a support frame 32 rigidly connected with the first support pile part 31, the support frame 32 is arranged on the top of the first support pile part 31, and the support The frame 32 is an integral structure.

[0054] The first support pile 311 is preferably a CFG pile or a concrete pile or a reinforced concrete pile, and the compressive strength of the pile body test block is not less than 15MPa; the reinforced beam 322 is a reinforced concrete beam, and the concrete strength is not lower than C30; The beam 322 is rigidly connected to the adjacent reinforcement pile 3a.

[0055] The ...

Embodiment 2

[0066] Such as Figure 1-3 As shown, the reinforcement structure for high-speed railway described in this embodiment is different from Embodiment 1 in that the first reinforcement pile foundation assembly 2 includes several second support piles 21 arranged vertically at intervals , the top of the first reinforced pile foundation assembly 2 is rigidly connected with a pile cap 22, and the outer edge of the pile cap 22 protrudes from the side wall of the second support pile 21, at the top of the first reinforced pile foundation assembly 2 Rigidly connecting the pile cap 22 increases the load-bearing area of ​​the first reinforced pile foundation assembly 2, fully exerts the load-bearing performance of the first reinforced pile foundation assembly 2, coordinates the proportion of the pile-soil bearing load, and improves the bearing capacity of the foundation.

[0067] On the basis of the above, in a further preferred manner, the second support piles 21 are arranged in a grid.

...

Embodiment 3

[0072] Such as figure 1 and 2 As shown, this embodiment discloses a subgrade assembly for high-speed railways, including a subgrade 1 with slopes 11 on both sides of the subgrade 1, and a reinforcing structure as described in embodiment 1 or 2 is arranged under the subgrade 1, The first reinforced pile foundation assembly 2 is arranged along the length direction of the roadbed 1, the second reinforced pile foundation assembly 3 is located on both sides of the first reinforced pile foundation assembly 2, at least a part of the second reinforced pile foundation The component 3 is located below the slope 11 .

[0073] Specifically, the thickness H of the reinforced cushion layer 2 is 400-600mm; the first tie bars in the cushion layer 5 can be arranged in one or more layers, and the ultimate tensile strength of the tie bars 2-a Greater than or equal to 80kN / m.

[0074] On the basis of the above, in a further preferred manner, a cushion layer 5 is also provided between the roadb...

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Abstract

The invention relates to the field of high-speed railway roadbed engineering. The invention relates to a roadbed, in particular to a high-speed railway reinforcing structure, a roadbed assembly, a roadbed system and a construction method. The reinforcing structure comprises a first reinforcing pile foundation assembly, second reinforcing pile foundation assemblies are arranged on the two sides ofthe first reinforcing pile foundation assembly respectively, each second reinforcing pile foundation assembly comprises a first supporting pile component and a supporting frame in rigid connection with the first supporting pile component, the supporting frames are arranged at the tops of the first supporting pile components, and the supporting frames are of an integrated structure. According to the reinforcing structure for the high-speed railway, the nonuniformity of anti-sliding stress of the first supporting pile parts in foundations within the coverage range of side slopes on the two sidesof a roadbed is effectively reduced, the anti-sliding damage capacity of the low-strength soft soil foundation is remarkably improved, and therefore the overall stability of the low-strength soft soil foundation roadbed is improved, and the probability of roadbed instability is reduced.

Description

technical field [0001] The invention relates to the field of high-speed railway roadbed engineering, in particular to a high-speed railway reinforcement structure, roadbed components, roadbed system and construction method. Background technique [0002] At present, due to the complex and diverse geological conditions in our country, roadbeds are sometimes built on soft soil foundations when building railways. Large settlement deformation has always been a difficult problem in the construction of high-speed railways in this area. Therefore, effective engineering measures must be taken to reinforce the low-strength soft soil foundation. [0003] Because high-speed railways have very high requirements for settlement control after subgrade construction, the traditional method of drainage consolidation, surcharge preloading method, and the composite foundation reinforcement method of bulk material piles mainly composed of gravel piles and compacted sand piles have been difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B2/00
CPCE01B2/00E01B2/006
Inventor 薛元张东卿刘菀茹罗强张良姜浩马宏飞曾锐牟迪周文洋封志军张硕肖朝乾周波张建文王智猛张涛姜瑞雪
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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