Ballast bed base prefabricated slab and application thereof

A technology of prefabricated panels and substrates, which is applied in the field of rail transit, can solve the problems of restricting construction progress, many models of vibration reduction products, and complicated construction techniques, and achieves processing accuracy and quality, which are easy to guarantee, good in practicability and applicability, and marketable Apply promising effects

Active Publication Date: 2015-07-22
QINGDAO CREATE ENVIRONMENT CONTROL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the construction method of the base is cast on site. Due to the limitation of the environmental conditions of the construction site, the complex construction process and the high skill requirements of the construction personnel, the surface of the base often has large local errors, which cannot meet the requirements of flatness and elevation. Design requirements, rework and renovations often occur, which greatly restricts the construction speed of the floating slab lot
[0004] In addition, the traditional design of the floating slab track bed adopts the scheme of horizontal base and inclined floating slab in the curve section. During the application of this scheme, some shortcomings are found, mainly in: the reinforcement of each floating slab is different, and the vibration reduction products involve There are many models, the production and installation are very inconvenient, the design and construction period is long, the efficiency is low, and the cost is high.
In order to overcome these deficiencies, setting superelevation on the base has become a standard practice in the design of floating slab track beds in recent years. However, this technical solution has encountered new problems in actual operation. The high value (horizontal along the track) is a linear gradient, and the line itself has a slope (longitudinal along the track), so that the base surface of the transitional curve section is theoretically a curved surface, because the construction base of the site pouring is relatively rough, and the concrete is easy to move when constructing an inclined base. Flowing at low places, these unfavorable factors lead to the fact that the base constructed on-site in the curved section is often difficult to meet the design requirements, or the elevation error exceeds the standard range of 0~-5mm, or the lateral slope does not meet the requirements, and the error is sometimes as high as ±30mm
[0005] According to the existing construction method, the flatness, elevation, and lateral slope of the curve section of the base poured on site often fail to meet the design requirements. Therefore, secondary treatment such as grinding or padding is often required after construction, which not only consumes manpower and material resources but also It restricts the construction progress, and even needs to be chiseled and redone in serious cases, causing a lot of economic waste

Method used

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  • Ballast bed base prefabricated slab and application thereof
  • Ballast bed base prefabricated slab and application thereof
  • Ballast bed base prefabricated slab and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Such as figure 1 and figure 2 The prefabricated slab of the ballast bed base of the present invention includes a slab body 1 prefabricated by reinforced concrete materials. The size of the slab body 1 is smaller than the actual design size of the base in the project. The middle part of the upper surface of the slab body 1 is provided with a drainage ditch 2. The body 1 is also provided with height and inclination adjustment devices 3 on both sides of its longitudinal centerline, wherein, the length of the plate body 1 along its longitudinal direction is 12.5m, and there are 10 height and inclination adjustment devices 3 in total, two of which are one The groups are evenly distributed longitudinally along the plate body. The height and inclination adjustment device 3 includes a steel anchor 5, and the anchor 5 is also provided with a threaded hole and a screw 4 that cooperate with each other, the screw 4 is also made of steel, and the anchor 5 is prefabricated with the...

Embodiment 2

[0089] Such as Figure 8 and Figure 9 The difference between the prefabricated slab of the ballast bed base of the present invention and the first embodiment is that the length of the slab body 1 along its longitudinal direction is 4.15m, and four height and inclination adjustment devices 3 are arranged in total, two of which are divided into two groups. Each set of height and inclination adjustment devices 3 is arranged at 1m from the longitudinal plate end of the plate body 1, and the distance between two adjacent sets of height and inclination adjustment devices 3 is 2m. In addition, the screw rod 4 in the height and inclination adjustment device 3 is built in the anchor piece 5 . In addition, two grouting channels 9 are also arranged in the gutter 2, and the grouting channels 9 are arranged in the middle of the two height and inclination adjusting devices 3 of the same group. The flatness error of the upper surface of the board is controlled at less than 2mm / m 2 .

[...

Embodiment 3

[0102] Such as Figure 13 and Figure 14 The difference between the prefabricated slab of the ballast bed base of the present invention as shown in Embodiment 1 is that a grouting channel 9 is also provided on the slab body 1, and the length of the slab body on the side where the grouting channel is provided is slightly shorter, and the plane profile of the entire slab body 1 is Isosceles trapezoidal, its length along its longitudinal centerline is 1.15m, and four height and inclination adjustment devices 3 are arranged on the board body 1 .

[0103] When applying the prefabricated slabs of the ballast bed base described in this example to construct the base of the floating ballast bed in a shield tunnel, take the transitional curve section as an example, and prefabricate a series of sections described in this example outside the tunnel according to the design size of the transitional curve section. The prefabricated ballast bed base slabs of the ballast bed base are controll...

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Abstract

The invention relates to a ballast bed base prefabricated slab and an application thereof. The ballast bed base prefabricated slab comprises a slab body formed by prefabricating reinforced concrete materials. The size of the slab body is smaller than the design size of a base. At least three height and dip angle adjusting devices are arranged on the slab body. The ballast bed base prefabricated slab is simple in structure, capable of being processed and manufactured in the place outside a tunnel or a factory, and the processing precision and quality are more easily ensured. The ballast bed base constructed by applying the ballast bed base prefabricated slab is small in error and high in precision. The construction method for the ballast bed base constructed by applying the ballast bed base prefabricated slab is easy, convenient and rapid to operate, the flatness, cross fall and other key indexes of the base can be effectively controlled with the help of the ballast bed base prefabricated slab, the site construction difficulty is greatly reduced, the construction efficiency can be greatly improved, waste caused by secondary treating or reworking is reduced, the ballast bed base prefabricated slab is excellent in economical performance, practicability and applicability and can be widely used for base construction inside the tunnel with linear segments and curving segments, and market application prospects are quite wide.

Description

technical field [0001] The invention belongs to the field of rail transit, and in particular relates to a construction method for constructing a ballast bed base by using a novel prefabricated slab technology and a corresponding prefabricated slab. Background technique [0002] Vibration and noise are recognized as the most widely affected public hazards, and they are also a problem that needs to be solved urgently in the development of rail transit in recent years. Among the existing rail transit vibration and noise reduction technologies, the most successful practical application is the floating slab track bed technology, which has high vibration isolation efficiency and stable working performance, which has become a consensus in the industry. [0003] The traditional track bed is integrated with the base. The floating slab ballast bed divides the whole ballast bed into two parts, the base and the floating slab. The floating slab is supported on the base by elastic elemen...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E01B1/00E01B29/00
Inventor白廷辉尹学军刘加华毕湘利宋键范恒秀王建立刘扬董国宪李育朝杨宏伟王建雷湘黔孔祥斐陈高峰黄俊飞王正
OwnerQINGDAO CREATE ENVIRONMENT CONTROL TECH