CN112523008A - Slurry-water isolation stone ballast track bed and construction method thereof - Google Patents

Abstract

The invention discloses a cement isolation stone ballast track bed and a construction method thereof, relating to the field of railway construction and comprising a stone ballast layer laid on a stratum foundation and a fixed sleeper laid with a steel rail and arranged on the stone ballast layer, wherein a mixture isolation layer is arranged between the stratum foundation and the stone ballast layer; the mixture isolating layer is composed of silicon dioxide, calcium oxide, aluminum oxide, magnesium oxide and other impurity fused mixture particle ingredients with the particle size of less than 6 meshes; the construction method of the slurry isolation stone ballast track bed comprises the following steps: 1. and 2, finishing a stratum foundation, 2, paving a mixture isolation layer, 3, paving a stone ballast layer, 4, paving a fixed sleeper and a steel rail according to the elevation and the gauge of the line technical requirement. The invention can solve the problem that the existing railway ballast bed of the factory railway is easy to cause railway diseases caused by local slurry turning and mud pumping.

Description

Slurry-water isolation stone ballast track bed and construction method thereof

Technical Field

The invention relates to the technical field of railway ballast track beds, in particular to a railway ballast track bed and a construction method thereof, which solve the problem of mud pumping problem of the railway track bed in a factory due to poor drainage system state and prevent the railway track bed from mud pumping due to the slurry pumping.

Background

In a factory railway construction site, due to the limitation of various objective conditions, a track bed foundation cannot be built according to the standards of a railway bureau, a drainage system of the track bed is incomplete, so that water is accumulated at the bottom of a part of railway track bed, the track panel is repeatedly vibrated in the repeated operation of a train on a steel rail to change a mud layer under the stone ballast track bed into slurry, the slurry splashes onto the stone ballast layer under the vibration of the track panel and the stone ballast and splashes out, stone ballast gaps are gradually filled, the stone ballast track bed is hardened and blocked, a vicious circle with continuously deteriorated drainage performance is formed, the mud layer foundation under the track bed is increasingly softened and sunken, the stone ballast bed and the steel rail surface are sunken, and the railway damage of local slurry dumping and mud pumping is formed. Particularly, the vibration caused by mutual dislocation of the ends of the two steel rails when the vehicle wheel pair passes through the steel rail joint is more violent and frequent, and the occurrence rate of the grout-turning and mud-pumping diseases at the steel rail joint is particularly high. On the premise of not being capable of fundamentally improving the drainage condition of the railway ballast bed, the mud pumping disease caused by slurry turning is difficult to be radically treated. There is a need to develop a technical method capable of effectively eliminating local mud pumping diseases on the premise that the drainage conditions near the railway ballast bed are not well improved.

Disclosure of Invention

The invention aims to solve the technical problem of providing a cement isolation stone ballast track bed and a construction method thereof, which can solve the problem that the existing cement isolation stone ballast track bed for the railway of a factory is easy to cause railway diseases caused by local slurry turning and mud pumping.

In order to solve the problems, the technical scheme of the invention is as follows: the cement isolation stone ballast track bed comprises a stone ballast layer laid on a stratum foundation and a fixed sleeper arranged on the stone ballast layer and provided with a steel rail, wherein a mixture isolation layer is arranged between the stratum foundation and the stone ballast layer.

In the above technical solution, a more specific solution is: the mixture isolating layer is composed of fused mixture particle ingredients with the particle size of below 6 meshes: 30-40% of silicon dioxide, 35-45% of calcium oxide, 10-20% of aluminum oxide, 6-10% of magnesium oxide and other impurities.

Further: the mixture isolating layer (2) is composed of fused mixture particles with the particle size of less than 6 meshes, such as 35% of silicon dioxide, 40% of calcium oxide, 15% of aluminum oxide, 8% of magnesium oxide and 2% of other impurities.

Further: the thickness of the stone ballast layer is more than or equal to 200 mm; the thickness of the mixture isolating layer is larger than or equal to 100 mm.

The construction method of the mud-water isolation stone ballast track bed as claimed in claims 1 to 3, which comprises the following construction steps:

the method comprises the following steps: and (3) finishing the stratum foundation:

1) excavating a ballast bed ditch, wherein the depth of the ditch is 750mm below the designed elevation of the steel rail surface, and the width of the ditch is more than or equal to the length of the rail sleeper plus 600 mm;

2) tamping a ballast bed ditch foundation;

step two: laying the mixture isolation layer, and compacting, wherein the thickness of the mixture isolation layer is 100-150 mm;

step three: paving a clean stone ballast layer on the mixture isolation layer, and ensuring that the thinnest part of the stone ballast layer is more than or equal to 200 mm;

step four: and paving the fixed sleepers and the steel rails on the stone ballast layer according to the elevation and the gauge of the technical line requirement.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the compacted mixture isolation layer which takes the special mixture as the base material is added between the stone ballast layer and the earth foundation of the railway stone ballast track bed, and the physical and chemical characteristics of the special mixture are utilized to ensure that the special mixture forms a layer of bulk solid with integral rigidity and certain elasticity under the comprehensive conditions of compaction, compression and humidity, so that a protective layer with certain rigidity and elasticity, which can penetrate water and can separate slurry from rising is formed, the functions of buffering, permeating water and preventing slurry from rising are achieved, and the railway disease of local slurry dumping and mud bleeding of a railway of a factory is effectively solved.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art factory railway;

FIG. 2 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 is a schematic cross-sectional structure of the present invention;

fig. 4 is a schematic cross-sectional view taken along line D-D of fig. 3.

The reference numbers in the figures denote:

1. a formation foundation; 2. a mixture isolation layer; 3. a stone ballast layer; 4. Fixing the sleeper; 5. Rail, 6, rail fastener assembly and anchor bolt.

Detailed Description

The invention is further illustrated with reference to the following figures and examples:

fig. 1 and fig. 2 are schematic structural diagrams of a conventional plant railway ballast track bed, and the defects of the conventional plant railway ballast track bed are already described in the background art and are not described herein again.

The mud-water isolation ballast track bed shown in fig. 3 and 4 comprises a ballast layer 3 laid on a stratum foundation 1 and a fixed sleeper 4 laid on the ballast layer 3, a steel rail 5 is fixed on the fixed sleeper 4 through a steel rail fastener assembly and an anchoring bolt 5, and a mixture isolation layer 2 is arranged between the stratum foundation 1 and the ballast layer 3.

The mixture isolating layer 2 is composed of the ingredients of the fused mixture particles with the particle size of below 6 meshes: the components are as follows: 30-40% of silicon dioxide, 35-45% of calcium oxide, 10-20% of aluminum oxide, 6-10% of magnesium oxide and other impurities.

In this example, the mix-separated layer 2 consists of particles of a molten mixture of 35% silicon dioxide having a particle size of 6 mesh or less, 40% calcium oxide, 15% aluminum oxide, 8% magnesium oxide and 2% other impurities.

The thickness of the stone ballast layer 3 is more than or equal to 200 mm; the thickness of the mixture isolating layer 2 is more than or equal to 100 mm.

The construction method of the slurry isolation stone ballast track bed comprises the following steps:

the method comprises the following steps: arranging a stratum foundation 1:

1) excavating a ballast bed ditch, wherein the depth of the ditch is 750mm below the designed elevation of the steel rail surface, and the width of the ditch is more than or equal to the length of the rail sleeper plus 600 mm;

2) tamping a ballast bed ditch foundation;

step two: laying a mixture isolating layer 2, compacting, wherein the thickness of the mixture isolating layer 2 is 100 mm-150 mm;

step three: paving a clean stone ballast layer 3 on the mixture isolation layer 2, and ensuring that the thinnest part of the stone ballast layer 3 is more than or equal to 200 mm;

step four: and paving a fixed sleeper 4 and a steel rail 5 on the stone ballast layer 3 according to the elevation and the gauge of the technical requirements of the line.

The working principle is as follows: the special mixture of appropriate thickness of one deck is spread additional between stone tiny fragments of stone, coal, etc. railway roadbed and earth foundation, because the physics and the chemical characteristic of this kind of special mixture self, special mixture granule pressurized can harden gradually and become the big solid that has good that the water permeability has a large amount of microgaps has whole rigidity and certain elasticity to form the one deck and have certain rigidity and elasticity and the water permeability is fine can separate the protective layer that keeps off the mud and scurry on, play similar for laying down to ooze worry cloth and prevent the effect that emits on the roadbed mud for railway roadbed.

The construction method of the slurry-isolation stone ballast track bed can be used for treating the road section with local slurry-overturning and mud-emitting:

the construction process for treating local slurry pumping comprises the following steps:

hollowing out the slurry turning and rising section line according to the following dimensions: the depth of the sleeper is 300mm to 400mm, if the sleeper is dug to the required size and still has slurry, the slurry needs to be cleaned until the solid soil is exposed, and the outer sides of two ends of the sleeper are 200mm to 250 mm.

And filling the special mixture at the hollowed part and tamping, wherein the surface of the special mixture is 200mm to 250mm away from the bottom of the sleeper, and the thinnest part of the special mixture layer is ensured to be more than or equal to 100 mm.

And after the special mixed material layer is treated, a stone ballast layer is laid completely, and the thinnest part of the stone ballast layer is ensured to be larger than or equal to 200 mm.

And adjusting the elevation and the track gauge of the technical requirement of restoring and renovating the partial line to the section of line.

Claims (5)

1. The utility model provides a stone tiny fragments of stone, coal, etc. railway bed is kept apart to muddy water, includes stone tiny fragments of stone, coal, etc. layer (3) of laying on stratum foundation (1) and establishes fixed sleeper (4) that stone tiny fragments of stone, coal, etc. layer (3) upper berth was equipped with rail (5), its characterized in that: and a mixture isolation layer (2) is arranged between the stratum foundation (1) and the stone ballast layer (3).

2. The mud-water isolation ballast track bed according to claim 1, characterized in that: the mixture isolating layer (2) is composed of fused mixture particle ingredients with the particle size of below 6 meshes: 30-40% of silicon dioxide, 35-45% of calcium oxide, 10-20% of aluminum oxide, 6-10% of magnesium oxide and other impurities.

3. The mud-water isolation ballast track bed according to claim 2, characterized in that: the mixture isolating layer (2) is composed of fused mixture particles with the particle size of less than 6 meshes, such as 35% of silicon dioxide, 40% of calcium oxide, 15% of aluminum oxide, 8% of magnesium oxide and 2% of other impurities.

4. The mud-water isolation ballast track bed according to claim 3, wherein: the thickness of the stone ballast layer (3) is more than or equal to 200 mm; the thickness of the mixture isolating layer (2) is more than or equal to 100 mm.

5. The construction method of the mud-water isolation stone ballast track bed as claimed in claims 1 to 3, which is characterized in that:

the method comprises the following steps: and (3) finishing the stratum foundation:

1) excavating a ballast bed ditch, wherein the depth of the ditch is 750mm below the designed elevation of the steel rail surface, and the width of the ditch is more than or equal to the length of the rail sleeper plus 600 mm;

2) tamping a ballast bed ditch foundation;

step two: laying the mixture isolation layer, and compacting, wherein the thickness of the mixture isolation layer is 100-150 mm;

step three: paving a clean stone ballast layer on the mixture isolation layer, wherein the thinnest part of the stone ballast layer is more than or equal to 200 mm;

step four: and paving the fixed sleepers and the steel rails on the stone ballast layer according to the elevation and the gauge of the technical line requirement.

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