Full-prefabricated assembled structure bridge suitable for grassland wetlands and construction method thereof

A technology of prefabricated assembly and construction methods, which is applied in the direction of foundation structure engineering, erection/assembly of bridges, bridges, etc., can solve the problems of small diameter range of pile foundation, weak horizontal shear bearing capacity of pile foundation, and few applications, so as to achieve construction Small safety risk, short construction time, and the effect of avoiding pollution

Pending Publication Date: 2019-09-10
四川省交通勘察设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has shortcomings such as a small range of pile foundation diameters to choose from, and a weak horizontal shear bearing capacity of the pile foundation. At present, it is rarely used in bridge engineering, especially bridge engineering in high-intensity earthquake areas.

Method used

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  • Full-prefabricated assembled structure bridge suitable for grassland wetlands and construction method thereof
  • Full-prefabricated assembled structure bridge suitable for grassland wetlands and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 versus figure 2 A fully prefabricated assembled structure bridge suitable for prairie wetlands is shown, including a plurality of prefabricated cap beams (2), and a plurality of linearly distributed notches (5) are provided on the prefabricated cap beams (2), and each notch (5) are provided with two jacks (6), the axes of the two jacks (6) are inclined from top to bottom to the opposite outer sides of the prefabricated cover beam (2), and each jack (6) is Insert a matching prefabricated pipe pile (1), the top of the prefabricated pipe pile (1) and the corresponding socket (6) are fixed by cast-in-place concrete; the upper part is laid on two adjacent prefabricated cap beams (2) The structure (7), the upper structure (7) is a prefabricated small box beam or a prefabricated composite beam.

[0038] In this embodiment, according to the topography and landform conditions, combined with the route requirements, the wiring location layout plan is determined. Co...

Embodiment 2

[0040] Such as figure 1 versus figure 2 A fully prefabricated assembly structure bridge suitable for prairie wetlands is shown. On the basis of Example 1, the top surface of the prefabricated cap beam 2 is rectangular, and a number of slots 5 on the prefabricated cap beam 2 are along the length of the rectangle. The axis is distributed, and the two insertion holes 6 in each notch 5 are inclined toward the two sides of the long axis of the rectangle. A step 4 is provided in the jack 6, and the prefabricated pipe pile 1 cannot pass through the step 4 from bottom to top. The angle between the axis of the prefabricated pipe pile 1 and the vertical line is 8°. The prefabricated cover beam 2 is integrally prefabricated or split prefabricated; when the prefabricated cover beam 2 is prefabricated separately, two adjacent parts are connected by a wet joint. The prefabricated pipe pile 1 is a mixed-reinforced prefabricated prestressed pipe pile, the prefabricated small box beam is a p...

Embodiment 3

[0052] Prefabricated components such as prestressed pile foundations, prefabricated cover beams, 25-meter small box beams, etc., are prepared by purchasing industrial products or establishing prefabricated yards. Use the repaired road as a transportation channel to transport the components to be assembled to the bridge location. Lay load-bearing boards on the ground to provide driving channels for pile drivers and cranes. The pile driver travels to the pile position and inserts the prefabricated pipe piles. After all the pile foundations of the first and second piers are driven, the crane is used to install the prefabricated cover beams and handle the joints. Cushion stone for cast-in-place bridge pier cap beam support. After the support cushion stone reaches the strength, install the support, use the bridge frame to set up a 25-meter small box girder, bind the beam body and the wet joint steel bar, and choose the machine to cast the wet joint of the beam body. While erecting...

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Abstract

The invention discloses a full-prefabricated assembled structure bridge suitable for grassland wetlands and a construction method thereof; the full-prefabricated assembled structure bridge includes anumber of precast capping beams, wherein a plurality of linearly distributed notches are formed in the precast capping beams, two inserting holes are formed in each notch, the axes of the two inserting holes are respectively inclined towards two opposite outer sides of the precast capping beam from top to bottom, a matched prefabricated pipe pile is inserted into each inserting hole, and the top ends of the prefabricated pipe piles and the corresponding inserting holes are fixed through cast-in-place concrete; an upper structure is laid on every two adjacent precast capping beams and is a small prefabricated box beam or a prefabricated superposed beam. The assembled structure bridge and the construction method are used for solving the problems that in the prior art, an annual effective construction period of an grassland wetland area is short, the seismic intensity is high, the ecology is fragile and the like, and construction of a traffic network is restricted; the purposes of avoiding pollution of a traditional pile hole filling pile foundation to an underground water system and reducing the influence on the grassland wetland ecological environment with a high environmental sensitivity are achieved.

Description

Technical field [0001] The present invention relates to the field of civil engineering, in particular to a fully prefabricated assembled structure bridge suitable for grassland wetlands and a construction method thereof. Background technique [0002] The construction of the transportation network in western China has entered a stage of "overcoming difficulties". For example, the upcoming "(Gansu) Jiuzhi-(Sichuan) Maerkang" expressway and the planned Sichuan-Tibet expressway, etc. have a large number of sections that need to pass through "high cold", "high seismic intensity", "ecologically fragile", and "water system". The snow-capped grassland wetland area of ​​northwest Sichuan with remarkable characteristics such as development. [0003] The soft foundation of the grassland wetland area is thick. If special roadbed treatment is used for road construction, large-depth and high-filled roadbeds will be filled, the cost will be higher, and quality monitoring will be difficult, and u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D18/00E01D19/00E01D21/00E02D5/58
CPCE01D18/00E01D19/00E01D21/00E02D5/58
Inventor 杨华平宋松科刘洋刘伟
Owner 四川省交通勘察设计研究院有限公司
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