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Light soil roadbed structure, roadbed system and design method thereof

A design method and technology for soil roadbed, applied in the field of geotechnical engineering, can solve the problems of difficult to completely eliminate soil uplift, high investment in pile-plate structure engineering, and high bearing requirements of pile structure, so as to dissipate the dynamic stress of trains, reduce ecological environment damage, The effect of reducing slope land

Active Publication Date: 2020-07-10
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is: for existing in the prior art: be used for the excavation of anti-uplift deformation and replace and fill and seriously damage ecological environment; The investment of pile-slab structure engineering is high; It is difficult to completely eliminate the problem that light soil cannot be used directly as a means to reduce the upper load. A light soil subgrade structure, subgrade system and design method are provided, which can not only effectively control the uplift deformation of the subgrade, but also effectively withstand the overall structure Load and control settlement deformation; save construction land and reduce ecological environment damage

Method used

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  • Light soil roadbed structure, roadbed system and design method thereof
  • Light soil roadbed structure, roadbed system and design method thereof
  • Light soil roadbed structure, roadbed system and design method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0088] Such as Figure 1-4 As shown, a light soil subgrade structure includes a reinforcement pile assembly 1, which is connected to the bottom of the support beam 2. The reinforcement pile assembly 1 includes several reinforcement piles 11, and all the reinforcement piles 11 are connected to the bottom of the support beam 2. 2 Arranged at intervals along the length direction, reinforcement piles 11 are arranged in rows at intervals along the longitudinal direction of the line; support beams 2 are arranged on the pile tops of reinforcement piles 11; The plate 4 is arranged above the support beam 2 along the longitudinal section of the line; the U-shaped tank body 5 is arranged on the top of the support plate 4; the soil filler layer 6 is filled in the U-shaped tank body 5; the drainage ditch 7 is arranged on the U-shaped tank body Type groove body 5 both sides.

[0089] In the above scenario:

[0090] The length of the reinforcement piles 11 is not less than 1.2 times the at...

Embodiment 2

[0097] Such as Figure 1-4 As shown, a roadbed system described in this embodiment includes a foundation 9, the reinforcement pile 11 is arranged in the foundation 9, the support beam 2 is arranged on the foundation 9, adjacent to the support beam There is a gap between the support plate 4 between the two and the foundation 9 .

[0098] In the subgrade system described in this application, the support beam 2 is arranged on the foundation 9, which can be used to transfer the load of the U-shaped groove body 5 and the self-weight of the support plate 4 to the foundation 9 and the reinforcement pile 11, and to transfer the The uplift force at the bottom of the support beam 2 is transmitted to the reinforcement pile 11, and there is a gap between the U-shaped groove body 5 between the adjacent support beams 2 and the foundation 9, thereby preventing the uplift force of the foundation 9 from directly Acts on the bottom of the U-shaped groove.

[0099] On the basis of the above, i...

Embodiment 3

[0103] Such as Figure 1-7 As shown, a design method for the subgrade system includes the following steps:

[0104] ① Determine the structural weight Wz of the support beam 2 by the following formula:

[0105] W z =BLHγ c

[0106] where W z is the structural weight of the support beam 2, unit kN; B is the width of the support beam 2, unit m; L is the length of the support beam 2, unit m; H is the height of the support beam 2, unit m; γc is Reinforced concrete weight, unit kN / m 3 ;

[0107] ② Determine the structural weight Wu of the support plate 4 by the following formula:

[0108] W u =bhSγ c

[0109] where W u For the structural weight of the support plate 4, the unit is kN; b is the width of the support plate 4, the unit is m; h is the thickness of the support plate 4, the unit is m; S is the distance between adjacent support beams 2, the unit is m ;

[0110] ③Determine the weight Wt of the structure of the U-shaped tank body 5, the soil filling layer 6 and th...

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Abstract

The invention relates to the technical field of geotechnical engineering, in particular to a light soil roadbed structure, a roadbed system and a design method thereof. The light soil roadbed structure comprises a U-shaped groove body being a structural member made of light soil, a soil filler layer filling the U-shaped groove body, a supporting plate arranged at the bottom of the U-shaped groovebody, a supporting beam arranged at the bottom of the supporting plate, and a reinforcing pile assembly connected to the bottom of the supporting beam. The reinforcing pile assembly comprises a plurality of reinforcing piles. According to the disclosed light soil roadbed structure, the upper load of the reinforcing pile assembly is reduced by combining the light soil material and the vertical characteristic of the U-shaped groove body; most of the rising acting force on the side wall of the reinforcing pile can be transmitted back to the lower foundation through the anchoring effect of the pile body, so that the rise deformation of the roadbed can be effectively controlled, the overall load of the structure can be effectively borne, and the settlement deformation is controlled; moreover, the construction land is greatly saved, and the damage to the ecological environment is reduced.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a light soil subgrade structure, a subgrade system and a design method. Background technique [0002] In the fields of high-speed railway embankment (especially low embankment or cutting bed) and tunnel engineering, the uplift deformation of rock foundation is an emerging geotechnical hotspot problem, such as frost heave of permafrost, expansion of expansive rock (soil), red bed Arching of soft rock, salt expansion of saline soil (rock) and other factors are new problems faced by railway builders. This is related to the extremely strict requirements for deformation control of high-speed ballastless railways. If the deformation of the foundation uplift exceeds the limit, it will easily lead to the cracking of the ballastless track slab of the high-speed railway, causing major ballastless track defects, affecting the smooth and comfortable operation of the train, a...

Claims

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Application Information

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IPC IPC(8): E01B2/00E02D5/22E03F5/04G06F30/13G06F30/20G06F119/14G06F111/04
CPCE01B2/006E02D5/22E03F5/04
Inventor 陈伟志姚裕春蒋关鲁袁胜洋李楚根
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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