CN219825203U - Transverse drainage system of railway embankment - Google Patents

Abstract

The utility model relates to the technical field of railway drainage engineering and discloses a transverse drainage system of a railway embankment, which comprises a drainage anti-filtering framework layer, wherein the drainage anti-filtering framework layer is arranged in the railway embankment along the transverse direction of the railway embankment and comprises geocells, coal gangue and composite geomembranes, wherein the coal gangue with different particle sizes is filled in the geocells, and the composite geomembranes are arranged below the geocells. The transverse drainage system of the railway embankment can enable the infiltrated water body to be smoothly drained out of the embankment along the transverse direction through the drainage reverse-filtering framework layer, and can achieve the technical effects of preventing infiltration damage in the embankment, achieving stable operation and improving the strength of the embankment.

Description

Transverse drainage system of railway embankment

Technical Field

The utility model relates to the technical field of railway drainage engineering, in particular to a transverse drainage system of a railway embankment.

Background

The railway embankment is a structure for bearing the self weight of rock and soil of the embankment and transmitting the gravity of a track and the driving load transmitted by a road surface, is a foundation of the track, is an important building for ensuring the running of a train, and is an important component of the whole railway structure. In the railway construction and operation process, external water medium such as rainfall can be inevitably permeated into the embankment from the upper part of the embankment or the slope of the embankment, the water medium permeated into the embankment can move downwards under the action of self weight of the water medium, if the water medium permeated into the embankment can not be timely discharged outwards, the strength and bearing capacity of the railway embankment can be reduced, and potential safety hazards are caused for safe and stable operation of the embankment. A common defect of a railway line embankment is slurry-casting and mud-casting, which is that clay soil of a embankment foundation bed on a railway in a rainy area is diluted into slurry after soaking, and enters a ballast gap under the action of power of a train and turns upwards, so that the ballast bed is dirty, unsmooth in drainage and loses elasticity, and the bearing capacity of the ballast bed and a road base surface is reduced, thereby affecting the safe and smooth running of the train.

At present, a transverse drainage pipeline is arranged in a embankment for draining an external water medium in the existing research.

The Chinese patent document (an induced roadbed transverse drainage construction method) with application number 201810913466.9 discloses an induced roadbed transverse drainage construction method, which comprises the following steps: s1, preparation of construction materials and machinery, S2, excavation of foundation pit, S3, slurry of rubble, S4, installation of pipelines, S5, concrete pouring, S51, formwork erection, S52, concrete stirring, S53, concrete transportation, S54, concrete unloading, S55, concrete pouring, S56, concrete maintenance, S57 and formwork removal. According to the induced roadbed transverse drainage construction method, under the condition that an existing highway roadbed structure is not changed, through the arrangement of the phi 100 water permeable hose and the phi 110HDPE transverse drain pipe, after the rainfall is large in a rainy season and rainwater permeates into the roadbed, water in the roadbed can flow out through the phi 100 water permeable hose and the phi 110HDPE transverse drain pipe.

In the above patent documents, this roadbed lateral drainage construction method causes the following problems:

firstly, the use of hollow drainage pipes reduces the strength and integrity of the embankment; secondly, the water medium above the embankment can infiltrate into the drainage pipeline through the embankment body, which clearly puts higher requirements on the installation and performance of the transverse drainage pipeline; then, if the water medium permeates into the holes of the drainage pipeline to be blocked, the drainage capacity can be greatly reduced, and the replacement of the pipeline is time-consuming and labor-consuming and has poor effect; finally, if the problem of damage occurs to the transverse drainage pipeline in the embankment, normal drainage of the embankment can be affected, embankment settlement can be generated, and further stability of the embankment is affected to be invalid.

In the prior art, there are also technical means for draining water in embankments by adopting other forms of transverse drainage channels.

The chinese patent document (a transverse drainage structure of a common speed rail) with application number 202110232167.0 discloses a transverse drainage structure of a common speed rail, comprising: a body and rail assembly; the main body is provided with a drainage channel extending along the transverse direction of the common speed railway, and the top of the drainage channel is open; the longitudinal beam assembly comprises a first longitudinal beam and a second longitudinal beam, wherein the first longitudinal beam and the second longitudinal beam are respectively erected at the opening position of the top of the drainage channel and are arranged at intervals along the transverse direction of the common speed railway so as to be used for paving sleeper of the common speed railway.

In the above patent document, the top of the drainage channel is open, so that the drainage channel is not protected and filtered, and is open for a long time, and water, soil and sundries enter the drainage channel, so that the drainage channel is blocked. In addition, if the first longitudinal beam fails, the drainage capacity of the drainage channel can be obviously reduced, the drainage effect is affected, and meanwhile, the safety operation of the railway is affected.

Therefore, how to ensure that the water medium permeated into the embankment can be discharged under the condition of safe and stable operation of the railway is a problem to be solved.

Disclosure of Invention

The utility model aims to solve the technical problems of poor operation stability and reduced railway embankment strength of a drainage device in the prior art, and provides a transverse drainage system of the railway embankment, which can stably operate without potential safety hazard and improve the railway embankment strength.

In order to achieve the above-mentioned purpose, the present utility model provides a lateral drainage system for a railway embankment, which comprises a drainage back-filtering skeleton layer, wherein the drainage back-filtering skeleton layer is arranged in the railway embankment along the lateral direction of the railway embankment, and comprises geocells, coal gangue and a composite geomembrane, wherein the coal gangue with different particle sizes is filled in the geocells, and the composite geomembrane is arranged below the geocells.

Preferably, the geocell is provided with strips made of high-density polyethylene, the height of the geocell is not more than 100mm, the thickness of the strips is not less than 1.2mm, and the type of nodes of the strips is welding type.

Preferably, the surface of the strip of the geocell is provided with holes and textures, the area ratio of the holes is not more than 60% of the area of the strip, and the concave thickness of the textures is not more than 0.5mm.

Preferably, the maximum particle size of the gangue is not more than 1/3 of the height of the geocell, the non-uniformity coefficient of the gangue is not less than 5, and the curvature coefficient is within 1-3.

Preferably, the mass per unit area of the composite geomembrane is not less than 800g/m ² And the breaking strength is not less than 14kN/m.

Preferably, both sides of the central axis of the cross section of the railway embankment are provided with drainage anti-filtering framework layers, and the drainage anti-filtering framework layers on each side are obliquely arranged along the cross section of the railway embankment respectively.

Preferably, the transverse drainage system further comprises a reinforced protection layer arranged above the drainage anti-filtering framework layer and a reinforced reinforcing layer arranged below the drainage anti-filtering framework layer, wherein the reinforced protection layer comprises a first geogrid and first U-shaped nails for fixing the first geogrid; the reinforced reinforcing layer comprises a second geogrid and second staples for fixing the second geogrid.

Preferably, the first geogrid is a unidirectional stretching plastic geogrid, the material is high-density polyethylene, the mesh length of the first geogrid is not more than 500mm, the mesh width is not more than 30mm, and the thickness is not less than 2.0mm; the arrangement space between every two adjacent first staples is not more than 2.0m.

Preferably, the second geogrid is a biaxially oriented plastic geogrid, the material is polypropylene, the mesh length and the width of the second geogrid are not more than 500mm, and the thickness is not less than 2.0mm; the arrangement space of the adjacent second staples is not more than 2.0m.

Preferably, the first staple and the second staple are arranged in a staggered manner in the vertical direction.

In the transverse drainage system of the railway embankment, disclosed by the utility model, the coal gangue with different particle sizes is filled in the geocell to form the reverse filtering layer, so that smooth drainage of permeated water can be ensured, and meanwhile, the soil body in the embankment is prevented from being drained along with the water body permeated into the embankment, so that the embankment is prevented from being permeated and damaged; and, unlike hollow drain pipe, the reverse filtering layer that forms in geotechnique's check room through gangue filling is difficult to damage, has the technical effect that the operation is stable and promotes railway embankment intensity. Meanwhile, the composite geomembrane is arranged below the geocell, so that the infiltrated water body can be prevented from further infiltration, and the infiltrated water body is transversely discharged out of the embankment through the drainage reverse-filtering framework layer. Therefore, the transverse drainage system of the railway embankment can enable the infiltrated water body to smoothly drain out of the embankment along the transverse direction through the drainage reverse-filtering framework layer, and can achieve the technical effects of preventing infiltration damage in the embankment, running stably and improving the strength of the embankment.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

fig. 2 is a schematic structural view of the drainage back-filtering skeleton layer in fig. 1.

Description of the reference numerals

1-a railway embankment; 2-a reinforced protective layer; 21-a first geogrid; 22-first staple; 3-draining the water and reversely filtering the framework layer; 31-geocell; 32-gangue; 33-composite geomembrane; 4-a reinforced reinforcing layer; 41-a second geogrid; 42-second staple.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the utility model and are not intended to limit the scope of the utility model, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.

These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

It should be noted that, in the description of the present utility model, unless otherwise indicated, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The "plumb" is not strictly plumb, but is within an allowable error range. The meaning of "plural" is two or more. The orientation or positional relationship indicated by the terms "longitudinal", "transverse", etc. are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or elements in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly. The word "comprising" and the like means that elements preceding the word encompass the listed elements following the word, and does not exclude the possibility of also encompassing other elements.

All terms used herein have the same meaning as understood by one of ordinary skill in the art to which the present utility model pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

Referring to fig. 1-2, in some embodiments, the transverse drainage system comprises a drainage back-filtering framework layer 3, wherein the drainage back-filtering framework layer 3 is arranged in the railway embankment 1 along the transverse direction of the railway embankment 1 and comprises a geocell 31, coal gangue 32 and a composite geomembrane 33, wherein the geocell 31 is filled with the coal gangue 32 with different particle sizes, and the composite geomembrane 33 is arranged below the geocell 31.

It should be appreciated that the gangue 32 with different particle sizes may be any material capable of forming a reverse filtering layer and having a supporting function, for example, crushed stone with different particle sizes or an aggregate layer composed of coarse aggregate and fine aggregate may be used. Because the gangue is used as slag in the coal mining process, not only a large amount of land space resources are occupied, but also serious environmental pollution is caused by spontaneous combustion. Meanwhile, the composite geomembrane 33 may be any water impermeable membrane.

Specifically, the non-uniformity coefficient of the gangue 32 is not less than 5, and the curvature coefficient is between 1 and 3, so that good grading can be formed by simultaneously meeting the two conditions of the gangue 32, and a better reverse filtering effect can be achieved. Further, the maximum particle size of the gangue 32 is not more than 1/3 of the height of the geocell 31.

In addition, in order to ensure that the composite geomembrane 33 meets the engineering design requirements, the mass per unit area of the composite geomembrane 33 is not less than 400g/m ² And the breaking strength is not less than 5kN/m, preferably not less than 800g/m per unit area mass ² And the breaking strength is not less than 14kN/m.

Preferably, the geocell 31 has strips made of high density polyethylene, the height of the geocell 31 is not more than 100mm, the thickness of the strips is not less than 1.2mm, and the type of nodes of the strips are welded.

Further, in order to ensure that the geocell 31 can drain smoothly and can be attached to the ground in the embankment, holes and textures are provided on the surface of the strips of the geocell 31. Meanwhile, in order to ensure the strength of the geocell, the area ratio of the holes is not more than 60% of the area of the strip, and the concave thickness of the texture is not more than 0.5mm.

Preferably, in order to improve drainage efficiency of the lateral drainage system, referring to fig. 2, drainage back-filtering skeleton layers 3 are provided at both sides of a central axis of a cross section of the railway embankment 1, further, a plurality of drainage back-filtering skeleton layers 3 are provided in a longitudinal direction of the cross section of the railway embankment 1, and each drainage back-filtering skeleton layer 3 is provided obliquely along the cross section of the railway embankment 1, respectively.

Wherein, it should be noted that, in order to guarantee the drainage efficiency of the drainage back-filtering skeleton layer 3, the outer drainage gradient of the drainage back-filtering skeleton layer 3 along the cross section of the railway embankment is greater than or equal to 3 degrees, and in order to guarantee the normal construction and operation of the drainage back-filtering skeleton layer 3 adjacent in the longitudinal direction, the outer drainage gradient of the drainage back-filtering skeleton layer 3 along the cross section of the railway embankment is less than or equal to 6 degrees. Therefore, the outer drainage slope of the drainage back-filtering skeleton layer 3 along the cross section of the railway embankment is preferably 3 ° to 6 °.

In addition, in order to further protect the drainage anti-filtering skeleton layer 3, the transverse drainage system of the utility model further comprises a reinforced protection layer 2 arranged above the drainage anti-filtering skeleton layer 3 and a reinforced reinforcing layer 4 arranged below the drainage anti-filtering skeleton layer 3.

Specifically, the reinforced protective layer 2 includes a first geogrid 21 and first staples 22 for fixing the first geogrid 21. Preferably, the first geogrid 21 is a unidirectional stretching plastic geogrid, the material is high-density polyethylene, the mesh length of the first geogrid 21 is not more than 500mm, the mesh width is not more than 30mm, and the thickness is not less than 2.0mm; the arrangement pitch of the adjacent first staples 22 is not more than 2.0m.

Specifically, the reinforced reinforcing layer 4 includes a second geogrid 41 and second staples 42 for fixing the second geogrid 41. Preferably, the second geogrid 42 is a biaxially oriented plastic geogrid, the material is polypropylene, the mesh length and width of the second geogrid 42 are not more than 500mm, and the thickness is not less than 2.0mm; the arrangement pitch of the adjacent second staples 42 is not more than 2.0m.

Preferably, in order not to deteriorate the integrity of the embankment, first staples 22, second staples 42 are arranged in a staggered manner in the vertical direction.

The utility model has the beneficial effects that:

(1) According to the utility model, coal gangue with different particle sizes is filled in the geocell to form the reverse filtering layer, so that the water is discharged, meanwhile, the soil body in the embankment can be prevented from being damaged by permeation, and the water discharge reverse filtering framework layer is different from the existing hollow water discharge pipe, and can also improve the bearing capacity of the railway embankment.

(2) The gangue is used as slag in the coal exploitation process, not only occupies a large amount of land space resources, but also causes serious environmental pollution due to spontaneous combustion, and the gangue is used as the raw material of the drainage back-filtering framework layer, so that the method has economy and environmental protection.

(3) The composite geomembrane is arranged below the geocell, so that the infiltrated water body can be prevented from further infiltration, the railway embankment is damaged, and the infiltrated water body can be transversely discharged out of the embankment through the drainage reverse-filtering framework layer.

(4) Through all being provided with drainage and straining the skeleton layer in the axis both sides of railway embankment cross section to and set up a plurality of drainage and straining the skeleton layer in the longitudinal direction of cross section, and the drainage of each side straining the skeleton layer and set up along the cross section slope of railway embankment respectively, promoted drainage ability and drainage effect greatly.

(5) The reinforced protection layer is arranged above the drainage anti-filtration framework layer, so that the vertical stress of the soil body on the upper part of the drainage anti-filtration framework layer can be effectively diffused, and the drainage anti-filtration framework layer is further protected.

(6) The reinforced reinforcing layer is arranged below the drainage anti-filtration framework layer, so that the sedimentation deformation of soil at the lower part of the drainage anti-filtration framework layer can be prevented, and the outer drainage gradient of the transverse drainage anti-filtration framework layer is effectively maintained.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a plurality of simple variants of the technical proposal of the utility model can be carried out, comprising that each specific technical feature is combined in any suitable way, and in order to avoid unnecessary repetition, the utility model does not need to be additionally described for various possible combinations. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.

Claims (10)

1. The utility model provides a railway embankment's horizontal drainage system, its characterized in that, horizontal drainage system includes drainage anti-skeleton layer (3) that strains, drainage anti-skeleton layer (3) set up in railway embankment (1) along the horizontal direction of railway embankment (1) to including geotechnique's check room (31), gangue (32) and compound geomembrane (33), wherein, different particle diameters gangue (32) fill in geotechnique's check room (31), compound geomembrane (33) set up in geotechnique's check room (31) below.

2. The lateral drainage system of a railway embankment according to claim 1, characterized in that said geocell (31) has strips of high density polyethylene, and the height of said geocell (31) is not greater than 100mm, the thickness of said strips is not less than 1.2mm, the type of junction of said strips is welded.

3. A railway embankment lateral drainage system according to claim 2, characterized in that the surface of the strips of geocells (31) is provided with holes and textures, the area ratio of the holes being not more than 60% of the area of the strips, the concave thickness of the textures being not more than 0.5mm.

4. The lateral drainage system of a railway embankment according to claim 1, characterized in that the maximum particle size of said gangue (32) is not more than 1/3 of the height of said geocell (31), the non-uniformity coefficient of said gangue (32) is not less than 5, and the curvature coefficient is within 1-3.

5. The lateral drainage system of a railway embankment according to claim 1, characterized in that the mass per unit area of the composite geomembrane (33) is not less than 800g/m ² And the breaking strength is not less than 14kN/m.

6. The transverse drainage system of a railway embankment according to claim 1, characterized in that the drainage back-filtering skeleton layer (3) is arranged on both sides of the central axis of the cross section of the railway embankment (1), and the drainage back-filtering skeleton layers (3) on each side are respectively arranged obliquely along the cross section of the railway embankment (1).

7. The lateral drainage system of a railway embankment according to claim 1, characterized in that it further comprises a reinforced protection layer (2) arranged above the drainage back-filtering skeleton layer (3) and a reinforced reinforcement layer (4) arranged below the drainage back-filtering skeleton layer (3), wherein the reinforced protection layer (2) comprises a first geogrid (21) and first staples (22) for fixing the first geogrid (21); the reinforced reinforcing layer (4) comprises a second geogrid (41) and second staples (42) for fixing the second geogrid (41).

8. The transverse drainage system of a railway embankment according to claim 7, characterized in that the first geogrid (21) is a unidirectional stretching plastic geogrid, the material is high-density polyethylene, the mesh length of the first geogrid (21) is not more than 500mm, the mesh width is not more than 30mm, and the thickness is not less than 2.0mm; the arrangement pitch of the adjacent first staples (22) is not more than 2.0m.

9. The transverse drainage system of a railway embankment according to claim 7, wherein the second geogrid (41) is a biaxially oriented plastic geogrid, the material is polypropylene, the mesh length and the width of the second geogrid (41) are not more than 500mm, and the thickness is not less than 2.0mm; the arrangement pitch of the adjacent second staples (42) is not more than 2.0m.

10. The railway embankment lateral drainage system according to claim 7, characterized in that said first staples (22), second staples (42) are staggered in the vertical direction.