CN212688612U

CN212688612U - Large-scale track gallows roof beam of side slope consolidates ground on railway roadbed

Info

Publication number: CN212688612U
Application number: CN202020680548.6U
Authority: CN
Inventors: 马建雷; 王文学; 李善朴
Original assignee: Road and Bridge International Co Ltd; China Communication North Road and Bridge Co Ltd
Current assignee: Road and Bridge International Co Ltd; China Communication North Road and Bridge Co Ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2021-03-12
Anticipated expiration: 2030-04-28

Abstract

The application belongs to the technical field of pressure-bearing reinforced foundations, and particularly relates to a foundation reinforced by a large-scale track hanging bracket beam on a side slope of a railway roadbed. The existing reinforced foundation usually adopts a foundation structure of lower layer reinforced concrete, middle layer sandy or grey soil layer, upper layer concrete and steel plate paving layer, when the existing reinforced foundation is used for coping with a crawler crane with the specification of more than 1000 tons, the foundation is easy to generate deformation and cracks, and the service life is obviously shortened. The utility model provides a large-scale track gallows roof beam consolidates ground on railway roadbed slope, including four-layer structure, do respectively from bottom to top: a steel pipe grouting layer with the thickness of 1.5-4.0m, a pebble soil layer with the thickness of 1-3m, a concrete layer with the thickness of 0.3-0.6m and a steel plate layer with the thickness of 2-4 m. The application has alleviated the influence of huge overdraft betterly, will receive the force uniform release to it is impaired to have protected the difficult deformation of ground when the pressure-bearing, has good steadiness, is favorable to prolonging the life of ground, has improved engineering efficiency of construction.

Description

Large-scale track gallows roof beam of side slope consolidates ground on railway roadbed

Technical Field

The application relates to the technical field of pressure-bearing reinforced foundations, in particular to a foundation reinforced by a large-scale track hanging bracket beam on a side slope of a railway roadbed.

Background

At present, with the rapid development of the traffic infrastructure of China, the existing railway line engineering striding on the road is more and more, and the existing railway line engineering striding on the road is more and more widely applied by adopting a striding railway bridge form. Due to the limitation of time points of railway skylights, the reported construction task needs to be completed in a specific time when the railway is required to be constructed over the railway. How to complete the hoisting of the bridge beam slab quickly and safely under the condition of special terrain is very important.

In order to finish the hoisting of the bridge beam slab, a crawler crane is generally used in engineering, and the crawler crane is commonly known as a crawler crane and is a full-rotation movable arm frame type crane with a crawler traveling device. The lifting capacity is large, the lifting device can lift and walk, and the lifting device has strong lifting capacity. In the hoisting of the bridge beam plate of the railway, huge hoisting gravity is always required to be borne, and in addition, the large crawler crane with the hoisting capacity even reaching 1000 tons also has great weight, so that the test is provided for the foundation bearing the crawler crane.

The existing reinforced foundation usually adopts a foundation structure of lower-layer reinforced concrete, middle-layer sandy or grey soil layer, upper-layer concrete and steel plate paving layer, when the existing reinforced foundation is used for coping with a crawler crane with the specification of more than 1000 tons, the foundation is easy to deform and crack, the service life is obviously shortened, and the requirement of special operation cannot be met.

SUMMERY OF THE UTILITY MODEL

The application provides a large-scale track gallows roof beam of side slope consolidates ground on railway roadbed to solve current ground insecure deformation and crack appear easily, and the short problem of life.

The technical scheme adopted by the application is as follows:

the utility model provides a large-scale track gallows roof beam of side slope consolidates foundation on railway roadbed, includes four-layer structure, is respectively from bottom to top: a steel pipe grouting layer with the thickness of 1.5-4.0m, a pebble soil layer with the thickness of 1-3m, a concrete layer with the thickness of 0.3-0.6m and a steel plate layer with the thickness of 2-4 m.

Optionally, the steel pipe grouting layer is formed by performing pressurized grouting on a steel pipe with the diameter of 10-20cm, and through holes are distributed in the side wall of the steel pipe.

Optionally, the diameter of the through holes is 0.5-5.0cm, and the through holes are sequentially distributed on the side wall of the steel pipe at equal intervals from top to bottom.

Optionally, the steel pipe adopts the stake position to arrange: the pile spacing of the pile center is 1.5m, and the pile center is arranged in an equilateral triangle.

Optionally, the steel pipe adopts the stake position to arrange: the pile spacing of the pile arrangement center is 1.5m, and the pile arrangement center is in a honeycomb regular hexagon arrangement.

Optionally, the thickness of the steel pipe grouting layer is 2.5m, the thickness of the pebble soil layer is 2m, the thickness of the concrete layer is 0.5m, and the thickness of the steel plate layer is 3 cm.

Optionally, the concrete layer is made of concrete with the strength grade of C20 or C25.

The technical scheme of the application has the following beneficial effects:

the utility model provides a large-scale track gallows roof beam consolidates ground on railway roadbed slope, including four-layer structure, do respectively from bottom to top: a steel pipe grouting layer with the thickness of 1.5-4.0m, a pebble soil layer with the thickness of 1-3m, a concrete layer with the thickness of 0.3-0.6m and a steel plate layer with the thickness of 2-4 m. The four-layer structure that this application adopted has alleviated the influence of huge overdraft betterly, with the even release of atress to it is impaired to have protected the difficult deformation of ground when the pressure-bearing, has good steadiness, is favorable to prolonging the life of ground. In practical application, the hoisting operation safety and the railway slope stability are ensured, the machinery is prevented from overturning, the bearing capacity of the foundation is ensured, the construction machinery load is met, and the engineering construction efficiency is improved.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an embodiment of the present application;

illustration of the drawings:

wherein, the steel pipe grouting layer is 1, the pebble soil layer is 2, the concrete layer is 3, and the steel plate layer is 4.

In fig. 1, a dotted circle frame indicates a laying position in the embodiment of the present application, and fig. 2 is an enlarged schematic view of the structure in the embodiment of the present application.

Detailed Description

Fig. 1 is a schematic view of an application scenario of the embodiment of the present application. With reference to fig. 2, a schematic structural diagram of an embodiment of the present application is provided to facilitate understanding of technical solutions of the following embodiments.

The application provides a pair of large-scale track gallows roof beam of side slope consolidates ground on railway roadbed, including four-layer structure, do respectively from bottom to top: a steel pipe grouting layer 1 with the thickness of 1.5-4.0m, a pebble soil layer 2 with the thickness of 1-3m, a concrete layer 3 with the thickness of 0.3-0.6m and a steel plate layer 4 with the thickness of 2-4 m.

In the embodiment, a drilling machine is adopted for hole forming in the steel pipe grouting layer 1 during steel pipe grouting construction, and the diameter and the depth of an orifice meet the design requirements; grouting a steel pipe with a perforated floral tube, placing the perforated steel pipe, wherein the distance between the steel pipe and an orifice is about 0.5M, then filling 0.5cm of broken stone outside the pipe wall, finally sealing the orifice by using M10 mortar, placing a PVC (polyvinyl chloride) pipe at the orifice during hole sealing, and preferably, the PVC pipe is 20cm higher than a substrate; mixing cement slurry, adopting a low-pressure grouting mode, controlling the grouting pressure to be 0.4-0.5 MPa, observing at an interval of 30min after grouting is finished, and performing secondary grouting if the slurry level in the PVC pipe is reduced; and after grouting is finished and initial setting is carried out, cleaning the PVC grouting pipe reserved on the pavement, cleaning the pavement pollution and garbage, and preparing for filling pebble soil. Because adopt steel pipe slip casting layer 1, consolidate in the deep of ground, be favorable to strengthening the structural strength of this embodiment. On the steel pipe slip casting layer 1, lay cobble soil layer 2, cobble soil has better bearing capacity than sand bed or lime-soil layer, has improved the stress structure of this embodiment ground simultaneously, is favorable to when bearing super large pressure, evenly conducts the low pressure to steel pipe slip casting layer 1, and then introduces the stratum, has enlarged the bearing capacity scope of the ground of this embodiment.

Optionally, the steel pipe grouting layer 1 is formed by performing pressurized grouting on a steel pipe with the diameter of 10-20cm, and through holes are distributed in the side wall of the steel pipe.

The quality of steel pipe slip casting layer 1 is directly influenced in the arrangement of stake position, and the stake position that honeycomb regular hexagon set up has better structural characteristic, makes steel pipe slip casting layer 1 more even, and bearing nature is better.

Optionally, the thickness of the steel pipe grouting layer is 2.5m, the thickness of the pebble soil layer is 2m, the thickness of the concrete layer is 3m, and the thickness of the steel plate layer is 4 cm.

Optionally, the concrete layer 3 is made of concrete with strength grade of C20 or C25.

In the embodiment, in consideration of structural strength and economic cost, the concrete with the strength grade of C20 or C25 saves the economic cost under the condition of meeting the structural strength.

The utility model provides a large-scale track gallows roof beam consolidates ground on railway roadbed slope, including four-layer structure, do respectively from bottom to top: a steel pipe grouting layer 1 with the thickness of 1.5-4.0m, a pebble soil layer 2 with the thickness of 1-3m, a concrete layer 3 with the thickness of 0.3-0.6m and a steel plate layer 4 with the thickness of 2-4 m. The four-layer structure that this application adopted has alleviated the influence of huge overdraft betterly, with the even release of atress to it is impaired to have protected the difficult deformation of ground when the pressure-bearing, has good steadiness, is favorable to prolonging the life of ground. In practical application, the hoisting operation safety and the railway slope stability are ensured, the machinery is prevented from overturning, the bearing capacity of the foundation is ensured, the construction machinery load is met, and the engineering construction efficiency is improved.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims

1. The utility model provides a large-scale track gallows roof beam of side slope consolidates foundation on railway roadbed which characterized in that, includes four-layer structure, is respectively from bottom to top: a steel pipe grouting layer with the thickness of 1.5-4.0m, a pebble soil layer with the thickness of 1-3m, a concrete layer with the thickness of 0.3-0.6m and a steel plate layer with the thickness of 2-4 m.

2. The railway roadbed uphill large-scale track hanging bracket beam reinforced foundation as claimed in claim 1, wherein the steel pipe grouting layer adopts steel pipe with diameter of 10-20cm to perform pressurized grouting, and the side wall of the steel pipe is provided with through holes.

3. The railway roadbed upslope large-scale crawler hanger beam reinforced foundation as claimed in claim 2, wherein the diameter of the through holes is 0.5-5.0cm, and the through holes are sequentially distributed on the side wall of the steel pipe at equal intervals from top to bottom.

4. The railway roadbed upslope large-scale crawler hanger beam reinforced foundation of claim 1, wherein the steel pipes are arranged by adopting pile positions: the pile spacing of the pile center is 1.5m, and the pile center is arranged in an equilateral triangle.

5. The railway roadbed upslope large-scale crawler hanger beam reinforced foundation of claim 1, wherein the steel pipes are arranged by adopting pile positions: the pile spacing of the pile arrangement center is 1.5m, and the pile arrangement center is in a honeycomb regular hexagon arrangement.

6. The railway roadbed upslope large-scale crawler hanger beam reinforced foundation according to claim 1, wherein the thickness of the steel pipe grouting layer is 2.5m, the thickness of the pebble soil layer is 2m, the thickness of the concrete layer is 0.5m, and the thickness of the steel plate layer is 3 cm.

7. The railway roadbed uphill large-scale track hanging bracket beam reinforced foundation as claimed in claim 1, wherein the concrete layer is concrete with strength grade of C20 or C25.