CN211689710U - Novel ventilation pipe for treating frozen expansion and thawing settlement diseases of existing line roadbed - Google Patents
Novel ventilation pipe for treating frozen expansion and thawing settlement diseases of existing line roadbed Download PDFInfo
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- CN211689710U CN211689710U CN201922222351.8U CN201922222351U CN211689710U CN 211689710 U CN211689710 U CN 211689710U CN 201922222351 U CN201922222351 U CN 201922222351U CN 211689710 U CN211689710 U CN 211689710U
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Abstract
The utility model discloses a novel ventilation pipe for treating frozen swelling and thawing sinking diseases of the existing line road bed, which comprises a ventilation pipe and at least one unpowered fan arranged in the ventilation pipe; the ventilation pipe is provided with two ports with different ventilation calibers at two ends, and the ventilation pipe is densely provided with drying holes for communicating the outside and the inside of the ventilation pipe. The utility model discloses a set up unpowered fan in the ventilation pipe, the port ventilation bore of ventilation pipe both ends is inconsistent simultaneously, has improved the interior air flow speed of ventilation pipe, and the air current that flows at a high speed takes out the unsaturated moisture in the peripheral soil particle of ventilation pipe outer wall, has reduced the moisture content in the soil particle.
Description
Technical Field
The utility model relates to a railway construction and operation maintenance technical field, concretely relates to administer existing line road bed and freeze novel ventilation pipe that rises and melt heavy disease.
Background
In the existing dam type soil railway roadbed, because soil particles contain unsaturated water, when the temperature is reduced to below the freezing point in winter, the water in the soil particles is crystallized, so that the volume of the soil body is increased. When the content of unsaturated water in soil particles reaches a certain level, the road foundation soil body expansion rate caused by crystallization is increased, so that the line type of a road foundation is changed, and the railway operation safety is seriously influenced; meanwhile, in the spring of the next year, the roadbed soil body is frozen, swelled and ablated to form a spring solution due to the rise of the atmospheric temperature, and liquefied and settled, so that the railway operation safety is still influenced.
The soil subgrade frost heaving mechanism is as follows: taking the Subder section of the silver railway as an example, the roadbed is a dam type graded soil roadbed, the height of the embankment is 5 meters, the slope ratio is 1:1.75, the surface layer of the foundation bed is 0.5 meter grade crushed stone and 0.1 meter coarse sand is clamped by two pieces of one-film geotextile, and the bottom layer filler of the foundation bed is fine powder sand.
Due to the fact that water drainage in the subgrade bed is not smooth, in addition, the subgrade is cold in winter, frost-rise diseases and spring-soluble diseases occur in winter. The maximum height of the raised roadbed caused by the frozen expansion in winter in 2017 is 200mm, and the frozen expansion depth is mainly 1.5 m below the surface of the foundation bed (1 m below the geotextile).
The freezing and swelling of the soil in winter mainly have two factors: firstly, the water content in the soil exceeds a freezing critical value, and when the temperature is reduced in winter, the soil is frozen and expanded; secondly, in winter, due to the problem of underground temperature difference, underground water moves upwards, and when the underground water approaches the ground surface, vertical ice crystals are formed under the action of the low temperature of the ground surface, the ice crystals grow rapidly and are connected in parallel to form crystalline lenses, and when the crystalline lenses continue to grow, the crystalline lenses replace soil, so that the soil body is frozen and expanded.
The number of ice crystals (degree of soil frozen expansion) is related to the soil composition, particle size and soil compaction. The clay soil is larger than the gravel soil, the small particle size is larger than the large particle size, and the compacted soil is larger than the loose soil.
According to the structural design and technical requirements of the Taizhongyin railway roadbed, the Taizhongyin railway roadbed belongs to a small-particle-size compacted soil body, and the upper part (0.5 meter position) of a roadbed bed is blocked by two layers of geotextiles and one layer of waterproof membrane, so that the obstruction of underground water evaporation is caused, the water content in the roadbed bed is higher than the soil water content in the local natural landform state, and the probability and degree of freezing in winter are higher.
The traditional method for effectively treating frost heaving and spring dissolution mainly comprises the following steps:
(1) substitution method: replacing more than 70% of the non-frozen swelling material in the frozen swelling soil;
(2) a heat insulation method: paving heat insulation materials in the roadbed bed to block the frozen expansion of the road bridge;
(3) a stabilizing method: and lime and cement are doped into the frozen and expanded roadbed soil body to change the water content of the soil and obtain the stability of the soil body.
The three methods can be adopted on a newly-built railway line, but are obviously not applicable to the existing railway line: firstly, the cost is too high; secondly, the normal operation of the railway is influenced by the open circuit.
(4) Traditional method for treating frost heaving and spring solvent of existing line
According to the principle of convenient construction, low cost and no influence on train operation, the current common method of railway operation departments is to bury a phi 50 punching PVC pipe at the junction surface of a line ballast and a roadbed at a severe frost heaving road section (particularly at the position of a culvert), wherein the punching aperture is phi 10, and the hole spacing is uncertain. The method has the advantages that due to the fact that the aperture is large and the distance is uncertain, and no soil conservation design is adopted, the phenomena of blocking and no water drainage occur; with the constraints of operating process conditions, the buried pipe is shallow in depth and therefore is essentially ineffective.
For a long time, frost heaving of soil subgrade in winter and spring soluble diseases in spring are persistent diseases which always troubles the maintenance department of railway operation, and need to be effectively solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides an administer existing line road bed and freeze novel ventilation pipe that rises and melt heavy disease through set up unpowered fan in the ventilation pipe, the port ventilation bore of ventilation pipe both ends is inconsistent simultaneously, has improved the air flow speed in the ventilation pipe, and the air current that flows at a high speed takes out the unsaturated moisture in the peripheral soil particle of ventilation pipe outer wall, has reduced the moisture content in the soil particle.
In order to achieve the above object, the utility model adopts the following technical scheme:
a novel ventilation pipe for treating the frozen swelling and thawing sinking diseases of the existing line roadbed comprises a ventilation pipe and at least one unpowered fan arranged in the ventilation pipe; the ventilation pipe is provided with two ports with different ventilation calibers at two ends, and the ventilation pipe is densely provided with drying holes for communicating the outside and the inside of the ventilation pipe.
Furthermore, the ventilation pipe comprises a ventilation pipe body, and a reducer union and a grid plug which are respectively arranged at two ends of the ventilation pipe body; the ventilation aperture of reducer union is less than the ventilation aperture of grid end cap, unpowered fan installs in the ventilation pipe body, the dry hole sets up on the ventilation pipe body.
Furthermore, the ventilation pipe body comprises a plurality of ventilation pipe sub-bodies and a plurality of connectors which are sequentially connected with the ventilation pipe sub-bodies; the drying holes are respectively arranged on the plurality of ventilation pipe sub-bodies.
Preferably, the reducer joint is a bayonet type reducer joint.
Preferably, the grid plugs are bayonet type grid plugs.
Preferably, the connector is a clamping tenon type uniform-section connector.
Furthermore, the drying holes are arranged at equal intervals, the interval between every two adjacent drying holes is 20mm, and the aperture of each drying hole is 10 mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the port ventilation calibers at the two ends of the ventilation pipe are not consistent to form a narrow opening, so that natural air at the two ends of the ventilation pipe flows in the pipe, the unpowered fan is arranged in the pipe, and the unpowered fan rotates under the air flow speed in the pipe to improve the air flow speed in the pipe; the ventilation pipes are densely distributed with the drying holes, and the airflow flowing at high speed in the pipes takes unsaturated water out of soil particles around the outer walls of the ventilation pipes, so that the water content in the soil particles is reduced, and the water content in the soil particles is reduced to the frost heaving rate of a soil body without affecting the form of a roadbed;
(2) because the ventilation pipe does not use external power in the working process, the aim of reducing the water content of the soil particles of the roadbed can be achieved through natural wind, and the operation cost is low.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a sectional view taken along line a-a of the embodiment of the present invention.
Fig. 3 is a schematic view of a reducing joint structure according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a grid plug according to an embodiment of the present invention.
Wherein, the names corresponding to the reference numbers are:
the method comprises the following steps of 1-unpowered fan, 2-drying holes, 3-reducer joints, 4-grid plugs, 5-vent pipe bodies and 6-connecting pieces.
Detailed Description
To make the objectives, technical solutions and advantages of the present application more clear, the present invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples.
Examples
As shown in fig. 1 to 4, in the present embodiment, a novel ventilation pipe for managing the frozen swelling and thawing-sinking damage of the existing railway foundation is provided, and it should be noted that the terms of "first", "second", "third", and the like in the present embodiment are only used for distinguishing similar components, and cannot be understood as a specific limitation to the protection range. In addition, the terms of orientation such as "bottom", "top", "side edges", and the like in the present embodiment are explained based on the drawings.
The novel ventilation pipe for treating the frozen swelling and thawing sinking diseases of the existing line roadbed comprises a ventilation pipe and at least one unpowered fan 1 arranged in the ventilation pipe; the two ends of the ventilation pipe are provided with two ports with different ventilation calibers, and the ventilation pipe is densely provided with drying holes 5 for communicating the outside and the inside of the ventilation pipe. The diameters of the vent holes of the two ports are different to form a narrow opening, according to the principle of 'the maximum flow rate of the narrow opening' of the aerodynamic, natural air at the two ends of the vent pipe flows in the pipe, the unpowered fan 1 is additionally arranged in the pipe, and the unpowered fan 1 rotates under the air flow speed in the pipe to improve the air flow speed in the pipe.
The ventilation pipe comprises a ventilation pipe body 5, and a reducer union 3 and a grid plug 4 which are respectively arranged at two ends of the ventilation pipe body 5; grid end cap 4 is used for preventing that worm and bird and debris from getting into in the ventilation pipe, and reducer union 3's ventilation bore is less than grid end cap 4's ventilation bore for form the pipeline throat, unpowered fan 1 installs in ventilation pipe body 5, specifically fixes through the inner wall connection of connecting piece 6 with ventilation pipe body 5, and drying hole 2 sets up on ventilation pipe body 5. Specifically, the drying holes 2 are arranged at equal intervals, the interval between adjacent drying holes 2 is 20mm, and the diameter of each drying hole 2 is 10 mm. The unpowered fans 1 are installed one by one at intervals. The ventilation pipe body 5 comprises a plurality of ventilation pipe sub-bodies and a plurality of connectors (not shown in the figure) which are sequentially connected with the ventilation pipe sub-bodies; the connector is used for connecting each section ventilation pipe daughter, and the length of single ventilation pipe daughter is 1000mm, and dry hole 2 sets up respectively on a plurality of ventilation pipe daughter. The outer side of the vent pipe sub body is tightly wrapped with short-filament geotextile; the outer diameter of the ventilation pipe body is 85mm, the construction can be carried out by adopting a 100mm down-the-hole drill, and the construction is convenient. The short-filament geotextile is used for protecting the soil of the roadbed from loss and protecting the ventilation pipe from blockage.
In order to facilitate the installation and connection, the reducer union 3 is a bayonet type reducer union. Grid end cap 4 is the grating end cap of falcon formula of card. The connector is the equal cross-section of joint of bayonet tenon formula.
The utility model discloses the ventilation pipe is arranged in dykes and dams formula road bed surface below 1.5 meters department during the installation, runs through the embankment section, when consequently drilling installation ventilation pipe, can go on in the road bed both sides, so do not influence line train normal operating, specifically for drilling at a road bed slope side direction opposite side, after drilling, the installation ventilation pipe, the ventilation pipe installation back, both sides terminal surface carry on cement mortar fixed can. The aim of reducing the water content of the soil particles of the roadbed can be achieved by natural wind without using external power in the working process of the ventilating pipe of the unpowered fan; after a ventilation pipe breaks down, the ventilation pipe can be pulled out through a conventional puller, and the ventilation pipe is replaced by another ventilation pipe, so that the maintenance is convenient. Can set up ventilation pipe daughter quantity according to specific length demand, satisfy different construction demands, the practicality is strong.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a administer existing line road bed and freeze novel ventilation pipe that rises and melt and sink disease which rises which characterized in that: the device comprises a ventilation pipe and at least one unpowered fan arranged in the ventilation pipe; the ventilation pipe is provided with two ports with different ventilation calibers at two ends, and the ventilation pipe is densely provided with drying holes for communicating the outside and the inside of the ventilation pipe.
2. The novel ventilation pipe for treating the frozen swelling and thawing sinking disease of the existing line subgrade according to the claim 1, is characterized in that: the ventilation pipe comprises a ventilation pipe body, and reducing joints and grid plugs which are respectively arranged at two ends of the ventilation pipe body; the ventilation aperture of reducer union is less than the ventilation aperture of grid end cap, unpowered fan installs in the ventilation pipe body, the dry hole sets up on the ventilation pipe body.
3. The novel ventilation pipe for treating the frozen swelling and thawing sinking disease of the existing line subgrade according to claim 2, is characterized in that: the ventilation pipe body comprises a plurality of ventilation pipe sub-bodies and a plurality of connectors which are sequentially connected with the ventilation pipe sub-bodies; the drying holes are respectively arranged on the plurality of ventilation pipe sub-bodies.
4. The novel ventilation pipe for treating the frozen swelling and thawing sinking disease of the existing line subgrade according to the claim 3, is characterized in that: the reducer union is a clamping falcon type reducer union.
5. The novel ventilation pipe for treating the frozen swelling and thawing sinking disease of the existing line subgrade according to the claim 3, is characterized in that: the grating plugs are clamping tenon type grating plugs.
6. The novel ventilation pipe for treating the frozen swelling and thawing sinking disease of the existing line subgrade according to the claim 3, is characterized in that: the connector is for calorie falcon formula uniform cross section joint.
7. The novel ventilation pipe for treating frozen swelling and thawing sinking diseases of the existing line subgrade according to any one of claims 1 to 6, is characterized in that: the drying holes are arranged at equal intervals and are adjacent to each other, the interval between the drying holes is 20mm, and the aperture of each drying hole is 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922222351.8U CN211689710U (en) | 2019-12-12 | 2019-12-12 | Novel ventilation pipe for treating frozen expansion and thawing settlement diseases of existing line roadbed |
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| CN201922222351.8U CN211689710U (en) | 2019-12-12 | 2019-12-12 | Novel ventilation pipe for treating frozen expansion and thawing settlement diseases of existing line roadbed |
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| CN211689710U true CN211689710U (en) | 2020-10-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878501A (en) * | 2019-12-12 | 2020-03-13 | 四川浩克山青水绿科技有限责任公司 | Novel ventilation pipe for treating frozen expansion and thawing settlement diseases of existing line roadbed |
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2019
- 2019-12-12 CN CN201922222351.8U patent/CN211689710U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878501A (en) * | 2019-12-12 | 2020-03-13 | 四川浩克山青水绿科技有限责任公司 | Novel ventilation pipe for treating frozen expansion and thawing settlement diseases of existing line roadbed |
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Effective date of registration: 20201228 Address after: No.760 Baiyun Road, Xindu industry east district, Xindu District, Chengdu City, Sichuan Province 610000 Patentee after: Chengdu Shuyu Tongtu New Material Technology Co., Ltd Address before: 610000 no.910, 9 / F, building 7, No.460, Wuke East 2nd Road, Wuhou District, Chengdu City, Sichuan Province 610000 Patentee before: Sichuan Haoke shanqingshuilv Technology Co.,Ltd. |