Prefabricated GFRP pipe concrete pile and reinforced concrete slab top-mounted subgrade pile-slab structure

A technology of reinforced concrete slabs and concrete piles, applied in the field of foundation engineering, can solve the problems of overall or local settlement of roadbed, high maintenance costs, long construction period, etc., and achieve the effects of high stiffness, high bearing capacity, and small uneven settlement.

Pending Publication Date: 2018-11-16
中铁七局集团第一工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has proved that the current treatment methods generally have a long construction period, and there are also problems with the overall or partial subsidence of the subgrade. It is difficult to meet the requirements for some projects with tight construction schedules and high requirements for foundation deformation.
In order to solve these problems, a

Method used

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  • Prefabricated GFRP pipe concrete pile and reinforced concrete slab top-mounted subgrade pile-slab structure
  • Prefabricated GFRP pipe concrete pile and reinforced concrete slab top-mounted subgrade pile-slab structure
  • Prefabricated GFRP pipe concrete pile and reinforced concrete slab top-mounted subgrade pile-slab structure

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0024] Example 1

[0025] In order to solve the problems existing in the existing technology, such as Figure 1 to Figure 11 As shown, the present invention provides a prefabricated GFRP pipe concrete pile and a reinforced concrete slab top-mounted subgrade pile plate structure, including GFRP pipe concrete pile 1, reinforced concrete slab 2, crushed stone cushion layer 3 and embankment filling layer 4, gravel The cushion layer 3 is arranged under the reinforced concrete slab 2, the top of the GFRP pipe concrete pile 1 is connected to the bottom of the crushed stone cushion layer 3, the bottom of the crushed stone cushion layer 3 is in contact with the ground, and the embankment fill layer 4 is installed Above the reinforced concrete slab 2.

[0026] Specifically, the GFRP pipe concrete pile 1 includes a first GFRP pipe 9 and a concrete 6. The first GFRP pipe 9 is filled with concrete 6, and the first GFRP pipe 9 is used to wrap the concrete 6 therein. On the one hand, the GFRP pi...

Example Embodiment

[0038] Example 2

[0039] The prefabricated GFRP pipe concrete pile and the reinforced concrete slab top-mounted subgrade pile plate structure, other features are the same as the embodiment 1, the difference is: this embodiment discloses another subgrade pile plate structure without pile cap 5, such as figure 2 As shown, the top of the GFRP pipe concrete pile 1 is connected with the bottom of the crushed stone cushion layer 3. There is no pile cap 5 design, the pile body of the GFRP pipe concrete pile 1 is pierced with the gravel cushion layer 3, and the soil between the piles is compacted To bear part of the upper load, reduce the load borne by the pile body, thereby saving pile material, suitable for relatively good soil foundation.

Example Embodiment

[0040] Example 3

[0041] The structure of the precast GFRP pipe concrete pile and the reinforced concrete slab top-mounted subgrade pile plate structure. The other features are the same as the embodiment 1. The difference is that: this embodiment discloses another GFRP pipe concrete pile 1 with the top of the pile body broken The structure of the stone cushion 3, such as image 3 As shown, the top of the pile body of the GFRP pipe concrete pile 1 penetrates the gravel cushion 3 and is connected to the bottom of the reinforced concrete slab 2. The upper load is all borne by the pile body of the GFRP pipe concrete pile 1, avoiding the top of the pile body and the reinforced concrete The settlement caused by the compression of the cushion between the plates 2 improves the stability of the foundation. Used for soft soil foundation with poor soil quality.

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PUM

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Abstract

The invention discloses a prefabricated GFRP pipe concrete pile and a reinforced concrete slab top-mounted subgrade pile-slab structure. The structure comprises the GFRP pipe concrete pile, a reinforced concrete slab, a metalling cushion layer and an embankment filling, the metalling cushion layer is arranged below the reinforced concrete slab, the top of the GFRP pipe concrete pile is in contactwith the bottom of the metalling cushion layer or penetrates through the metalling cushion layer to be connected to the bottom of the reinforced concrete slab, the embankment filling is placed above or below the reinforced concrete slab or wrapped on the outside of the reinforced concrete slab, on the one hand, the reinforced concrete slab is used for homogenizing loads transmitted to a foundationfrom the upper portion, and the GFRP pipe concrete pile is used for transferring the loads to a bearing layer deep in the foundation; on the other hand, a GFRP pipe forms a constraint on concrete, the concrete is placed in a three-direction stress state to improve the ductility of the concrete, thereby improving the bearing capacity and seismic ductility of the GFRP pipe concrete pile, and the GFRP pipe has strong corrosion resistance and excellent protection effect on the internal concrete and steel bars.

Description

technical field [0001] The invention belongs to the field of foundation engineering, and relates to a railway subgrade structure, in particular to a top-mounted subgrade pile-slab structure for high-speed railways. Background technique [0002] Today, with the rapid development of my country's economic construction, railway construction has also produced rapid progress, and the geological conditions for crossing have become complex. The settlement of soft soil subgrade has become one of the major problems faced in railway construction. The conventional soft soil subgrade treatment method requires a long construction period, and cannot fundamentally solve the problem of uneven settlement of the foundation. At present, the treatment methods for soft soil subgrade are mainly divided into shallow and deep treatment methods. The shallow treatment methods mainly include reinforced soil method, dynamic compaction method, replacement method and bagged manhole method, etc. The deep t...

Claims

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Application Information

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IPC IPC(8): E01B2/00E02D5/10
CPCE01B2/006E02D5/10
Inventor 乔彪王连广闫东旭魏福军鹿书剑宋峰利吴阳韩安吕君阳位朝亮刘伟杰赵瑞祥郭东阳张耀升
Owner 中铁七局集团第一工程有限公司
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