CN220579702U - Multiple drainage system and waterproof system of ditch section railway embankment - Google Patents

Abstract

The utility model relates to the field of railway roadbed engineering, and discloses a multiple drainage system and a waterproof system of a railway embankment at a gully section. Through the scheme, the multiple drainage system can cope with different rainfall conditions to drain water: when the rainfall is small, the rainwater in the gully section can be discharged through the water passing culvert; when rainfall increases, rainwater level in the gully section will be higher than the embankment waterproof layer, accessible embankment drainage layer and water culvert carry out the drainage jointly this moment for drainage efficiency to reduce the osmotic pressure of embankment both sides, uninstall upstream water pressure fast, avoid the erosion of rainfall ponding to the railway embankment, and then ensured the safety and stability of railway line operation.

Description

Multiple drainage system and waterproof system of ditch section railway embankment

Technical Field

The utility model relates to the technical field of railway embankment drainage engineering, in particular to a multiple drainage system of a railway embankment at a gully section. On the basis, the utility model also relates to a multiple waterproof system for the railway embankment of the gully section.

Background

The railway embankment is a structure for bearing own rock-soil self weight and transmitting track gravity and driving load transmitted from road surface, is a foundation of a track, is an important building for ensuring train operation, and is an important component of the whole railway structure. Complicated natural geological and geomorphic conditions are inevitably encountered in the construction process of the railway embankment, a gully section is one of the conditions, and the gully is a narrow channel which is naturally formed for years and collects upstream rainwater and drains downstream.

At present, the railway embankment formed by filling the gully section in the prior art mainly comprises a drainage culvert for passing and draining rainwater.

Patent document (gully section prevention of seepage embankment structure) of application number 201920633394.2 discloses a gully section prevention of seepage embankment structure, specifically, includes embankment, water culvert and sets up in the waterproof composite structure layer of water culvert windward side, and the road bed below the embankment is run through to the water culvert, and the rivers direction of water culvert is unanimous with the gully rivers direction, and waterproof composite structure layer lays on water culvert windward side slope and on the gully inner wall.

In the above patent document, the waterproof composite structure layer is arranged on the water-facing side of the water passing culvert, although the water passing culvert can be protected from rainwater infiltration, the upstream water medium can only pass through the water passing culvert, so that the drainage requirement can be met for the general rainfall condition fashion, the condition that drainage cannot be met possibly occurs when the rainfall is increased, and accordingly, the water head pressure on the two sides of the upstream and the downstream of the water passing culvert is rapidly increased in a short time, and the stability of the water passing culvert is greatly influenced. In addition, this embankment structure has mainly carried out waterproofly above ground, and does not set up relevant waterproof measure to the subsurface, still can produce the potential safety hazard to the embankment after the rainwater oozes, if produce the normal operation of harm circuit such as inhomogeneous subsidence.

Disclosure of Invention

An aspect of the present utility model is to provide a multiple drainage system for a railroad embankment in a gully section, which has a plurality of drainage channels, in order to overcome the problem of single drainage channel in the prior art;

on the other hand, in order to solve the problems that water body permeates into the ground of the railway embankment and further influences the stability of the railway embankment in the prior art, the multi-waterproof system of the railway embankment in the gully section is provided, and the multi-waterproof system of the railway embankment is built in the gully section from multiple aspects.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a multiple drainage system for a railway embankment in a gully section, comprising a railway embankment and a water passing culvert penetrating through the railway embankment, wherein an embankment waterproof layer and an embankment drainage layer capable of allowing water to pass through is arranged in the railway embankment, and the water passing culvert is higher than the embankment waterproof layer.

In some embodiments, the embankment drainage layer comprises a plurality of layers of reinforced cage drainage layers, wherein the reinforced cage drainage layers comprise metal cages orderly stacked in sequence in a horizontal direction, coal gangue preloaded in the metal cages, and unidirectional geogrids for wrapping the reinforced metal cages.

In some embodiments, the unidirectional geogrid tensile strength is not less than 120kN/m.

In some embodiments, the ribbed cage drainage layer further comprises staples, the metal cages being staggered in the vertical direction, adjacent ribbed cage drainage layers being fixedly connected by the staples.

In some embodiments, the height of the embankment waterproof layer is 1/2-2/3 of the height of the water passing culvert.

Through the scheme, the multiple drainage system of the ditch section railway embankment can cope with different rainfall conditions to drain water: when the rainfall is small, rainwater in the gully section can be discharged through the water passing culvert, and the height of the water passing culvert is higher than that of the waterproof layer of the embankment, so that when the water level of the rainwater accumulated in the gully section is not higher than that of the waterproof layer of the embankment, the rainwater in the water passing culvert can be ensured to have free water surfaces on the whole length of the water passing culvert, and the pressure of water heads at the upstream and downstream of the embankment is prevented from rising too fast; more importantly, the multiple drainage system is provided with the embankment drainage layer on the upper side of the embankment waterproof layer, and the rain water level in the gully section is higher than that of the embankment waterproof layer due to high rainfall, and meanwhile, the drainage can be carried out jointly through the embankment drainage layer and the water culvert, so that the drainage efficiency is improved, the osmotic pressure on the two sides of the embankment is reduced, the upstream water pressure is rapidly unloaded, the erosion of rainfall ponding to the railway embankment is avoided, and the safety and stability of railway line operation are further ensured.

The utility model further provides a multiple waterproof system of the railway embankment at the ditch section, which comprises the multiple drainage system of the railway embankment at the ditch section, ditch wing walls arranged at two sides of the railway embankment, an underground waterproof structure for preventing underground water from penetrating into underground soil of the railway embankment, a ground first waterproof layer for preventing ground water from penetrating into the underground soil of the railway embankment, and a ground second waterproof layer for preventing water in a drainage layer of the embankment from penetrating into the waterproof layer of the embankment.

In some embodiments, the underground waterproof structure comprises a waterproof isolation underground wall respectively arranged below the ground of the upstream section of the water culvert and the downstream section of the water culvert, and the surface layer of the waterproof isolation underground wall is paved with a mass per unit area of not less than 800g/m ² A first composite geomembrane having a thickness of not less than 0.5mm.

In some embodiments, the waterproof isolation underground wall extends to a height of not less than 1m below the ground surface, has a thickness of not less than 0.1m, has a length of not less than the ground width of the gully, and has a distance of not less than 1m from the entrance of the water culvert.

In some embodiments, the ground first waterproof layer comprises a second composite geomembrane laid on the surface layer of the embankment waterproof layer, the upstream section of the water passing culvert, the gully wing wall, the downstream section of the water passing culvert and the inner wall of the water passing culvert; wherein the unit area mass of the second composite geomembrane is not less than 800g/m ² The thickness is not less than 0.5mm.

In some embodiments, the ground second waterproof layer comprises a third composite geomembrane laid on the bottom and both sides of the embankment drainage layer, wherein the third composite geomembrane has a mass per unit area of not less than 600g/m ² The thickness is not less than 0.3mm.

Through the technical scheme, the multiple waterproof system of the ditch section railway embankment can be used for constructing the waterproof system from multiple aspects: firstly, arranging an underground waterproof structure, wherein the underground waterproof structure can prevent underground water from penetrating into underground soil of a railway embankment to damage soil of the railway embankment, thereby affecting the running stability of the railway embankment; secondly, a first waterproof layer on the ground is arranged, so that the ground water body can be prevented from penetrating into the railway embankment, the safe operation of the railway embankment is further affected, and the flowing direction of the water body can be unified and can be discharged through a water passing culvert; and finally, the ground second waterproof layer is arranged in the embankment drainage layer, so that the water can be prevented from penetrating into the embankment waterproof layer downwards when passing through the embankment drainage layer, thereby causing railway embankment disasters and affecting railway safe driving. From the above, the multiple waterproof system of the railway embankment at the gully section of the utility model constructs a waterproof system from three aspects, prevents water from entering the railway embankment in multiple directions, and further ensures the safety and stability of railway line operation.

Drawings

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

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic illustration of the laying of a second composite geomembrane in accordance with one embodiment of the utility model;

fig. 4 is a schematic structural view of a ribbed cage drainage layer of one embodiment of the present utility model.

Description of the reference numerals

1-a railway embankment; 11-a embankment waterproof layer; 12-embankment drainage layers; 13-a third composite geomembrane; 14-a ribbed cage drainage layer; 141-staple; 142-unidirectional geogrid; 143-a metal cage; 144-gangue; 2-passing through a culvert; 3-an upstream section of the water passing culvert; 4-waterproof isolation underground wall; 5-a gully wing wall; 6-a downstream section of the water passing culvert.

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 the terms "first," "second," "third," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. "multilayer" means two or more layers. The "plumb" is not strictly plumb, but is within an allowable error range. The "horizontal" is not strictly parallel but is within the allowable error range. "comprising" means that elements preceding the word encompass the listed elements after the word, and 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.

In one aspect, the present utility model discloses a multiple drainage system for a railway embankment in a gully section, referring to fig. 1, in some embodiments, the multiple drainage system comprises a railway embankment 1 and a water passing culvert 2 penetrating through the railway embankment 1, an embankment waterproof layer 11 and an embankment drainage layer 12 which is arranged on the upper side of the embankment waterproof layer 11 and can allow water to pass through are arranged in the railway embankment 1, and the height of the water passing culvert 2 is higher than that of the embankment waterproof layer 11.

The height of the water passing culvert 2 is higher than the height of the embankment waterproof layer 11, and when the height of the water level of the rainwater accumulated in the gully section is not higher than the height of the embankment waterproof layer, the rainwater in the water passing culvert can be ensured to have free water surfaces on the whole length of the water passing culvert, so that the pressure of the upstream water head and the downstream water head of the embankment is prevented from rising too fast; the embankment drainage layer 12 is arranged on the upper side of the embankment waterproof layer 11, and the embankment drainage layer 12 can allow water to pass along the flowing direction, so that when the height of the rainwater level accumulated in a gully section exceeds the height of the embankment waterproof layer, the embankment drainage layer 12 and the water culvert 2 can drain water simultaneously, the drainage efficiency is quickened, the osmotic pressure on the two sides of the embankment is reduced, the upstream water pressure is rapidly unloaded, the erosion of rainfall ponding to the railway embankment is avoided, and the safety and stability of railway line operation are further guaranteed.

Further, referring to fig. 1 and 4, the embankment drainage layer 12 includes a plurality of reinforced cage drainage layers 14, wherein the reinforced cage drainage layers 14 include metal cages 143 sequentially stacked in order in a horizontal direction, coal gangue 144 preloaded in the metal cages 143, and unidirectional geogrids 142 for re-packing the reinforced metal cages 143.

Wherein, can be through filling the gangue 144 of different particle diameters in metal box with a net 143, and then form the reverse filtering layer, realize discharging the water in the embankment drainage layer 12 and prevent the technical effect that the soil body in the railway embankment 1 runs off simultaneously, but also can play the effect of supporting railway embankment 1, further promote the bearing capacity of railway embankment 1. Specifically, in order to ensure a good reverse filtering effect, the non-uniformity coefficient of the gangue 144 is made not less than 5, and the curvature coefficient is between 1 and 3.

Of course, the coal refuse 144 may be replaced with other materials, for example, crushed stone satisfying the above-described conditions of the non-uniformity coefficient and curvature coefficient, or an aggregate layer composed of coarse aggregate and fine aggregate. However, since 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, the utility model is based on the purposes of waste utilization and environmental protection, and the gangue is preferably used as the raw material of the ribbed cage drainage layer 14.

In addition, the metal net cage 143 may be any geotechnical material having a receiving space and supporting function, for example, a geotechnical cell having a surface with a certain hole area may be used.

Preferably, the unidirectional geogrid 142 has a tensile strength of not less than 120kN/m.

In addition, the ribbed cage drainage layer 14 further includes staples 141, and the metal cages 143 are stacked in staggered relation in the vertical direction, and adjacent ribbed cage drainage layers 14 are fixedly connected by the staples 141. It should be appreciated that the staggered stacking of the metal cages 143 in the vertical direction can ensure the integrity of the embankment drainage layer 12, thereby improving the bearing capacity of the railway embankment 1.

Preferably, the height of the embankment waterproof layer 11 is 1/2-2/3 of the height of the water passing culvert 2 so as to prevent the osmotic pressure at two sides of the railway embankment 1 from rising too fast and ensure the safe and stable operation of the railway embankment 1.

In another aspect, the present utility model discloses a multiple waterproof system for a railway embankment at a gully section, referring to fig. 1, which comprises the above-mentioned multiple drainage system, gully wing walls 5 provided at both sides of the railway embankment 1, an underground waterproof structure for preventing an underground water body from penetrating into an underground soil body of the railway embankment 1, a ground first waterproof layer for preventing a ground water body from penetrating into an underground soil body of the railway embankment 1, and a ground second waterproof layer for preventing a water body in an embankment drainage layer 12 from penetrating into an embankment waterproof layer 11.

Specifically, referring to fig. 2, the underground waterproof structure includes waterproof isolation underground walls 4 disposed below the ground of the upstream section 3 and the downstream section 6 of the water culvert, respectively, and the surface layer of the waterproof isolation underground walls 4 is laid with a mass per unit area of not less than 800g/m ² A first composite geomembrane having a thickness of not less than 0.5mm.

It can be understood that the waterproof isolation underground wall 4 and the first composite geomembrane laid on the surface thereof can prevent the underground water bodies of the upstream section 3 of the water culvert and the downstream section 6 of the water culvert from directly penetrating into the underground part of the railway embankment 1, so that the drainage path of the underground water bodies is prolonged, the hydraulic potential energy is reduced, and the influence of the underwater infiltration of rain on the stability of the railway embankment is weakened.

Preferably, the waterproof isolation underground wall 4 extends to a height not less than 1m below the ground surface, has a thickness not less than 0.1m, has a length not less than the width of the ground surface of the ditch where the ditch is located, and has a distance not less than 1m from the opening of the water culvert 2.

Preferably, the ground first waterproof layer comprises a second composite geomembrane paved on the surface layer of the embankment waterproof layer 11, the upstream section 3 of the water passing culvert, the gully wing wall 5, the downstream section 6 of the water passing culvert and the inner wall of the water passing culvert 2; wherein the unit area mass of the second composite geomembrane is not less than 800g/m ² The thickness is not less than 0.5mm.

Wherein, through ground first waterproof layer, can prevent the rainfall or the flow direction infiltration of rainwater from the gully upstream in the inside of railway embankment 1 to can make the flow direction of water unified and discharge through the water culvert 2.

Preferably, referring to fig. 1 and 3, the ground second waterproof layer includes a third composite geomembrane 13 laid on the bottom and both sides of the embankment drainage layer 12, wherein the mass per unit area of the third composite geomembrane 13 is not less than 600g/m ² The thickness is not less than 0.3mm.

The second waterproof layer is arranged on the ground, so that water can be prevented from penetrating into the waterproof layer of the embankment downwards when passing through the drainage layer of the embankment, and then disasters of the embankment of the railway are caused, and safe driving of the railway is affected.

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 multiple drainage system of ditch district railway embankment, its characterized in that includes railway embankment (1) and runs through water culvert (2) of this railway embankment (1), be provided with embankment waterproof layer (11) in railway embankment (1) and arrange in embankment drainage layer (12) that can allow the water to pass through of this embankment waterproof layer (11) upside, the height of water culvert (2) is higher than the height of embankment waterproof layer (11).

2. The multiple drainage system of a gully-section railway embankment according to claim 1, characterized in that the embankment drainage layer (12) comprises a plurality of layers of reinforced cage drainage layers (14), wherein the reinforced cage drainage layers (14) comprise metal cages (143) orderly stacked in order in the horizontal direction, gangue (144) pre-loaded in the metal cages (143) and unidirectional geogrids (142) for re-packing the reinforced metal cages (143).

3. The multiple drainage system of a gully-section railway embankment according to claim 2, characterized in that the unidirectional geogrid (142) has a tensile strength not less than 120kN/m.

4. The multiple drainage system of a gully-section railway embankment according to claim 2, characterized in that the ribbed cage drainage layer (14) further comprises a U-shaped nail (141), the metal cages (143) are stacked in a staggered manner in the vertical direction, and adjacent ribbed cage drainage layers (14) are fixedly connected by the U-shaped nail (141).

5. The multiple drainage system of a gully-section railway embankment according to claim 1, characterized in that the height of the embankment waterproof layer (11) is 1/2-2/3 of the height of the water passing culvert (2).

6. A multiple waterproof system for a railway embankment in a gully section, characterized by comprising the multiple drainage system for a railway embankment in a gully section according to any one of claims 1 to 5, gully wing walls (5) arranged on both sides of the railway embankment (1), an underground waterproof structure for preventing underground water from penetrating into an underground soil body of the railway embankment (1), a ground first waterproof layer for preventing ground water from penetrating into an underground soil body of the railway embankment (1), and a ground second waterproof layer for preventing water in a drainage layer (12) of the embankment from penetrating into the waterproof layer (11) of the embankment.

7. The multiple waterproof system of a gully-section railway embankment according to claim 6, characterized in that the underground waterproof structure comprises waterproof isolation underground walls (4) respectively arranged below the ground of the upstream section (3) and the downstream section (6) of the water culvert, and the waterproof isolation underground walls (4) are laid on the surface layer with a mass per unit area of not less than 800g/m ² A first composite geomembrane having a thickness of not less than 0.5mm.

8. The multiple waterproof system of a gully-section railway embankment according to claim 7, characterized in that the waterproof isolation underground wall (4) extends to a height of not less than 1m below the ground surface, a thickness of not less than 0.1m, a length of not less than the ground width of the gully where it is located, and a distance of not less than 1m from the entrance of the water culvert (2).

9. The multiple waterproof system of a gully section railway embankment according to claim 7, wherein the ground first waterproof layer comprises a second composite geomembrane laid on the waterproof layer of the embankment (11), the upstream section of the water culvert (3), the gully wing wall (5), the surface layer of the downstream section of the water culvert (6) and the inner wall of the water culvert (2); wherein the unit area mass of the second composite geomembrane is not less than 800g/m ² The thickness is not less than 0.5mm.

10. The multiple waterproof system of a gully-section railway embankment according to claim 6, characterized in that the ground second waterproof layer comprises a third composite geomembrane (13) laid on the bottom and both sides of the embankment drainage layer (12), wherein the mass per unit area of the third composite geomembrane (13) is not less than 600g/m ² The thickness is not less than 0.3mm.