CN112301805B - Roadbed freezing injury treatment device with horizontal bidirectional layered decompression - Google Patents
Roadbed freezing injury treatment device with horizontal bidirectional layered decompression Download PDFInfo
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- CN112301805B CN112301805B CN202010465653.2A CN202010465653A CN112301805B CN 112301805 B CN112301805 B CN 112301805B CN 202010465653 A CN202010465653 A CN 202010465653A CN 112301805 B CN112301805 B CN 112301805B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention provides a roadbed freezing injury treatment device with horizontal bidirectional layered decompression, which consists of a reinforced concrete support box body, a plurality of reinforced concrete movable panels, a low-friction coefficient isolation layer, a spring group, a threaded sleeve, a threaded guide rod, an embedded sleeve and a rubber protection layer. When the soil body is gradually frozen, the soil body at each depth generates frost heaving force, the two reinforced concrete movable panels at the corresponding depths of the device are pushed to move inwards, the frost heaving force is released, and meanwhile, the springs store energy, so that the frost heaving amount of the roadbed is reduced or eliminated; when the soil body melts, the spring of energy storage will promote both sides and melt the position and correspond the fly leaf and outwards move and extrude the soil body, increase road bed rigidity, reduce the road bed and melt the heavy volume. The device has the characteristics of uniform layered release of frost heaving force, low price, modularized manufacture, simple and rapid construction, strong adaptability, good waterproof performance, good durability, recycling, convenient maintenance and replacement and the like, and has wide application prospect in the aspect of preventing and treating subgrade frost damages.
Description
Technical Field
The invention relates to the field of railway roadbed freezing injury treatment in seasonal frozen soil areas, in particular to a roadbed freezing injury treatment device with horizontal frost heaving force released in a layered mode.
Background
Depending on the duration of the frozen state of the soil, frozen earth can be divided into seasonal frozen earth and perennial frozen earth. The seasonal frozen soil is soil which is frozen in winter on the surface layer of the ground and completely melted in summer, and the freezing time of the soil cannot exceed one season in one year. The permafrost is frozen soil which lasts for years in a frozen state and is not melted for years. China has vast frozen soil area, wherein seasonal frozen soil accounts for 55 percent of the territory area of China, and perennial frozen soil accounts for 1/5 percent of the territory area of China. The frozen soil is a special soil with a multiphase complex system, the property of the frozen soil is controlled by the ice content, the ice content is directly related to the temperature, the ice content is reduced when the temperature is increased, and the ice content is increased when the temperature is decreased. The change of the soil temperature is caused by the seasonal change of climate and the inevitable activity of human beings, so the property of the frozen soil is changed at any time, the frozen soil has dynamic characteristics, and the frozen soil is a soil body which is very sensitive to the temperature and has unstable property. In a seasonal frozen soil area, a road surface is unevenly bulged and swelled when a frozen soil disaster occurs, and the unevenness of the rail surface is reflected on a rail, so that the driving safety is endangered in a serious case.
At present, the main measures for remedying the frost damage of the existing railway subgrade are as follows: filling and changing method, drainage method, water-proof method, heat preservation method, physical chemical method (salt injection method and salt spreading method), squeezing method, rail lifting method, freezing damage base plate down slope method and the like. The replacement method is to replace the frost heaving soil of the existing roadbed with non-frost heaving soil, and the roadbed can be ensured not to frost heaving after replacement, but the method needs to interrupt the driving, has large workload and is rarely adopted in the actual frost damage remediation project. The drainage method is to eliminate or reduce frost heaving of the soil body of the roadbed by draining surface water or reducing dredging underground water and blocking lower-layer water. The water-resisting method is to use water-resisting layers made of various materials to make groundwater impermeable or to block the supply of capillary water, so as to prevent the upward migration of water produced during freezing and reduce or eliminate frost heaving. The heat preservation method is that a heat preservation and insulation layer is arranged on the surface layer (top surface and side slope) of the roadbed, so that the soil layer under the surface layer is not frozen or the freezing depth is reduced, the freezing of the soil body is delayed, the temperature in the soil is increased, and the frost heaving of the roadbed soil body is eliminated or reduced. The physical and chemical method (salt injection method and salt spreading method) is that some substances (such as industrial salt) are added into the roadbed filling to change the interaction between soil particles and water, so that the water migration strength and the freezing point in the soil body are changed to weaken the frost heaving of the soil. The compaction method is that holes are formed on the roadbed at a certain interval, then lime or cement improved soil is filled in the holes, the holes are compacted to form piles, soil bodies around the piles are solidified through material water absorption and ion exchange, and meanwhile, the soil between the piles is compacted in a compaction mode, so that the compaction degree of the soil bodies is improved, and the frost heaving amount of the roadbed is reduced. The application range of the lifting method is mainly a section of a water immersed subgrade and a section with continuous freezing damage under the condition of permission of plane and vertical section conditions. With the application of large-scale road maintenance machinery, the method for treating and controlling roadbed diseases by using the large-scale road maintenance machinery by lifting the road is the best choice for ensuring the driving safety, reducing the construction cost and smoothly implementing the engineering. The method for making frost damage backing plate follow slope is characterized by that when the roadbed is frost-swelled, between the steel rail and sleeper a bamboo plate or rubber backing plate is placed to make the roadbed undergo the process of following slope, and in the frost-swelled period the working principle of following backing must be adhered, and when the frozen soil is ablated, the backing plate can be removed from the roadbed, and in the period of falling freeze damage, the working principle of following falling and removing must be adhered.
The device mainly realizes the improvement of the subgrade frost damage by gradually releasing the horizontal frost heaving force in the frost heaving subgrade layer by layer and self-resetting. The device consists of a concrete supporting box body, a plurality of reinforced concrete movable concrete plates, a tetrafluoro plate (low friction) isolating layer, spring groups with different rigidity, a bolt fixing component and a rubber outer protecting layer. The device is convenient to construct. The device has the advantages of high strength, large vertical rigidity, water resistance, strong weather resistance and strong adaptability, and can meet the requirements of a roadbed on the bearing capacity and deformation of the roadbed. When the subgrade soil body is frozen and expanded in winter, the subgrade soil gradually generates frozen and expanded force from top to bottom, the frozen and expanded force pushes each horizontal movable plate to horizontally displace, the frozen and expanded force in the subgrade is released, the frozen and expanded amount of the subgrade is weakened or eliminated, and meanwhile, the spring group device compresses for energy storage; when the roadbed soil body melts in warm seasons, the rigidity of the surrounding soil body is reduced, and the energy stored by the spring group device pushes the movable plates to extrude the roadbed soil body towards two directions respectively in return, so that the purpose of reducing the melting and sinking amount is achieved. The above steps are repeated, so that frost heaving and thaw collapse hazards of the roadbed can be well weakened or eliminated, and the rubber protective layer on the outer surface can ensure that the device can be normally used in regions with abundant underground water. Compared with other measures, the device can reduce the workload, save the investment, has very important engineering application value and social benefit, and has wide application prospect in the aspect of solving the roadbed freezing injury.
The invention is based on the invention patent of ZL201610293305.5 patent number of the team, namely a device for preventing freezing damage of the existing roadbed capable of realizing bidirectional pressure reduction and self-resetting, and makes great improvement on the original device, so that the freezing damage of the existing roadbed can be more effectively remedied.
Disclosure of Invention
The invention provides a roadbed frost damage treatment device with horizontal bidirectional layered decompression, which is mainly used for realizing the treatment of roadbed frost heaving thaw collapse diseases by layered gradual release and self-resetting of horizontal frost heaving force in a frozen soil roadbed.
The technical problems to be solved by the invention mainly lie in that: overcome the shortcoming that current device can not evenly release the frozen expansive force and can not use in the higher area of moisture content, a road bed frozen injury renovation device of two-way layering decompression of new level is proposed, the device's panel is the design of layering piecemeal, layering quantity can be according to concrete use place and the position is nimble to be confirmed, panel layering design can release the frozen expansive force in the layering at road bed filling freezing in-process, it is more obvious to make the renovation effect, and the whole piece panel slope can not appear and make the device inefficacy and the untimely scheduling situation of frozen expansive force release, the working property and the reliability of device have been improved. In addition, a rubber waterproof layer is arranged on the outer surface of the device, so that the device has stronger adaptability compared with the existing device, and can be used in areas with higher underground water level and larger roadbed moisture content.
The invention mainly comprises the following parts: reinforced concrete supporting box, a plurality of reinforced concrete activity panel, tetrafluoro board isolation layer, spring group device, threaded guide pole, rubber protection layer and other parts, the function of the device essential element is: the reinforced concrete supporting box bears the upper load and holds and protects other components, the reinforced concrete supporting box is prefabricated and molded at one time, the spring groups provide required horizontal force and accumulate energy, the spring stiffness coefficient is selected according to the maximum horizontal frost heaving force in the roadbed measured in local, the number of the reinforced concrete movable panels and the parameters of each spring group are set according to the distribution form and the change rule of the frost heaving force, the stress and the deformation of each reinforced concrete movable panel are ensured to be adaptive to each soil layer, in order to ensure that the reinforced concrete movable panels only generate translational displacement and can not be blocked in the roadbed frost damage treatment device, low friction coefficients are arranged among the reinforced concrete movable panels and between the reinforced concrete movable panels and the reinforced concrete supporting box, the material selection and the thickness of the low friction coefficient isolation layer are determined by the parameters and the change rule of the frozen roadbed measured by indoor test and field test, the effect of the roadbed freezing injury treatment device meets the requirement; the reinforced concrete movable panel bears frost heaving force and acting force of the spring group, and has certain thickness, strength and rigidity, hole sites are reserved according to the positions of the spring devices during prefabrication, the spring devices are convenient to install and fix on site, and the springs are required to have certain initial compression amount during assembly of the device, so that active soil pressure of roadbed filling is offset. In order to protect the spring group and prevent the device from failing or even being damaged after water enters, a rubber protective layer is arranged on the outer surface of the device, and the thickness of the rubber protective layer (8) and the specific performance of rubber are determined by field environment parameters so as to meet the requirements of the roadbed freezing injury treatment device on durability and waterproof performance.
The invention has the technical effects that: when the soil body is frozen, water in the soil freezes and expands, the volume of frozen soil is correspondingly increased, frost heaving force is generated, two reinforced concrete movable panels at the corresponding depth positions in the horizontal direction in the device can be pushed to move inwards, the spring device stores energy, the frost heaving force in the soil body is released, uplift and lifting of a roadbed can be reduced, ice in the soil is melted into water when the soil body is melted, the volume of the soil body is reduced, corresponding rigidity is reduced, the springs in the device can respectively push the movable reinforced concrete plates at the two sides to move outwards to extrude the soil body, the rigidity of the roadbed soil body is increased, and the thaw deformation of the roadbed soil layer is reduced. This device adopts the level two to the decompression, and two directions of device level all have the fly leaf to carry out work promptly, have improved the renovation effect. The rubber protective layer on the outer surface can ensure that the device has stronger adaptability and durability and can be normally used in regions with abundant underground water.
The invention has the advantages that:
(1) high adaptability and reliable performance. The device has the advantages that the defects of the whole panel can be overcome due to the small height and the large number of the movable panels, when the frost heaving process develops along the depth in sequence, the concrete panel at the corresponding depth plays a role, the damage caused by frost heaving-thawing sinking can be reduced to the maximum extent, and the rigidity of each layer of spring group can be respectively set according to indoor and field test data;
(2) the manufacturing is convenient, and the construction is convenient. The device can be produced in a factory in a modularized manner, modules with different parameters are selected according to actual conditions on site, and the modules are assembled by bolts, so that the device is convenient and quick, and can be constructed by maintaining the skylight by using engineering;
(3) good durability and weather resistance, and good waterproof performance. This device has set up the rubber protection layer and can guarantee that the device has stronger adaptability and durability, can be abundant and the higher area normal use of road bed moisture content in groundwater, and the device can not cause the inefficacy because of intaking.
(4) The maintenance and the replacement are convenient and fast, and the investment is saved. When part of the device is damaged or fails in the using process, the efficacy can be recovered by replacing the device in time; good practicability, convenient operation, low price and easy popularization and application. Once the device is buried in place, the device can work for a plurality of freeze thawing periods in a circulating way, thereby saving time and labor; and the maintenance workload of the roadbed is reduced, and the maintenance cost is greatly reduced.
(5) The horizontal bidirectional decompression has more obvious treatment effect.
(6) Can be buried by manual digging without large-scale machinery and has short operation time.
(7) The device of the invention can be produced in a factory in a modularized way, and the quality is easy to ensure.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a view of the arrangement of the apparatus of the present invention along the longitudinal direction of a roadbed;
FIG. 2 is a layout of the apparatus of the present invention in a cross-section of a subgrade;
FIG. 3 is a top sectional view of the main structure of the apparatus of the present invention;
FIG. 4 is a front sectional view of the main structure of the apparatus of the present invention;
FIG. 5 is a side sectional view of the main structure of the device of the present invention;
FIG. 6 is a front and top view of the spring member of the device of the present invention;
in the figure: 1. the reinforced concrete supporting box comprises a reinforced concrete supporting box body, 2 a reinforced concrete movable panel, 3 a low-friction-coefficient isolation layer, 4 a spring group, 5 a threaded embedded sleeve, 6 a threaded guide rod, 7 an embedded sleeve, 8 a rubber protection layer and 9 a spring group device.
Detailed Description
The specific steps of the implementation of the device are further described in the following with reference to the attached drawings and the specific implementation steps.
Step zero: and (4) manufacturing the device, prefabricating required components according to design requirements, mounting the components and manufacturing a rubber protective layer.
The method comprises the following steps: construction preparation and device parameter selection. Measuring the road foundation soil parameters of the frozen road section, selecting device modules according to the measured parameters (the difference of different modules is mainly in spring elastic constant and height of the box body), and manufacturing and installing the processing device mainly in warm seasons.
Step two: and (5) excavating a pit. According to the time of skylight points, construction is carried out on an existing railway roadbed, one sleeper is firstly dismantled, railway ballast between the sleepers is excavated, and a pit groove with a corresponding size is excavated between the two sleepers.
Step three: and positioning and installing the device. And (4) placing the box body selected according to the above into the dug pit slot, and fixing.
Step four: and backfilling the roadbed to restore the original appearance of the line. And (5) checking the position and the verticality of the box body of the device, then backfilling the pit slot and compacting, recovering the railway ballast and the sleeper, and finishing construction.
Step five: and (5) monitoring the frost heaving amount and verifying the frost damage treatment effect.
Claims (8)
1. The utility model provides a road bed freeze injury renovation device of two-way layering decompression of level, a serial communication port, the device that provides comprises reinforced concrete supporting box (1), a plurality of reinforced concrete activity panel (2), low coefficient of friction isolation layer (3), spring group (4), threaded embedded sleeve (5), threaded guide rod (6), embedded sleeve (7) and rubber protection layer (8), spring group (4), threaded embedded sleeve (5), threaded guide rod (6) and embedded sleeve (7) constitute spring group device (9) jointly, its characterized in that: the reinforced concrete supporting box body (1) mainly bears vertical force, the reinforced concrete movable panels (2) are connected with the reinforced concrete supporting box body (1) through spring groups (4) and threaded guide rods (6), the plurality of reinforced concrete movable panels (2) are sequentially arranged along the vertical direction of a roadbed or the height direction of the reinforced concrete supporting box body (1), the reinforced concrete supporting box body (1) is provided with openings at two sides and a middle partition plate, and the plurality of reinforced concrete movable panels (2) are arranged at the openings of the reinforced concrete supporting box body (1); the low-friction-coefficient isolation layer (3) is arranged between the interior of the reinforced concrete supporting box body (1) and the reinforced concrete movable panels (2), the low-friction-coefficient isolation layer (3) is arranged between the reinforced concrete movable panels (2), and rubber protection layers (8) are arranged on the exterior of the reinforced concrete movable panels (2) and the exterior of the reinforced concrete supporting box body (1).
2. The device for improving the frost damage of the roadbed by means of horizontal bidirectional layered decompression according to claim 1, wherein the device comprises: the reinforced concrete supporting box body (1) is prefabricated and formed at one time, and a threaded embedded sleeve (5) is embedded in advance.
3. The device for improving the frost damage of the roadbed by horizontal bidirectional layered decompression according to claim 1, wherein: the reinforced concrete movable panel (2) is prefabricated by concrete, embedded sleeves (7) are embedded in the designed positions, and a plurality of reinforced concrete movable panels (2) are selected according to the height of the actual reinforced concrete supporting box body (1) when the roadbed freezing injury treating device is assembled.
4. The device for improving the frost damage of the roadbed by horizontal bidirectional layered decompression according to claim 1, wherein: the inner side of the reinforced concrete supporting box body (1) and four side surfaces of the reinforced concrete movable panel are provided with low-friction-coefficient isolation layers (3) for reducing the mutual friction force.
5. The device for improving the frost damage of the roadbed by horizontal bidirectional layered decompression according to claim 1, wherein: the material selection and the thickness of the low-friction coefficient isolating layer (3) are determined by the parameters and the change rules of the frozen soil roadbed determined by indoor tests and field tests, so that the effect of the roadbed freezing injury treatment device meets the requirements.
6. The device for improving the frost damage of the roadbed by means of horizontal bidirectional layered decompression according to claim 1, wherein the device comprises: the spring group device (9) is composed of a threaded embedded sleeve (5) fixed on a side plate of the reinforced concrete supporting box body (1) during prefabrication, a spring group (4), a threaded guide rod (6) and an embedded sleeve (7) embedded on the reinforced concrete movable panel (2).
7. The device for improving the frost damage of the roadbed by horizontal bidirectional layered decompression according to claim 6, wherein: the elastic coefficient of the spring group (4) is determined by roadbed horizontal frost heaving force and other related parameters measured by indoor and field tests, and the number and the arrangement position of the springs are determined by the number of the reinforced concrete movable panels (2) and related theoretical calculation.
8. The device for improving the frost damage of the roadbed by horizontal bidirectional layered decompression according to claim 1, wherein: the thickness of the rubber protective layer (8) and the specific performance of the rubber are determined by field environment parameters so as to meet the requirements of the roadbed freezing injury remediation device on durability and waterproof performance.
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| CN202010465653.2A CN112301805B (en) | 2020-05-28 | 2020-05-28 | Roadbed freezing injury treatment device with horizontal bidirectional layered decompression |
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| CN202010465653.2A CN112301805B (en) | 2020-05-28 | 2020-05-28 | Roadbed freezing injury treatment device with horizontal bidirectional layered decompression |
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| CN112301805B true CN112301805B (en) | 2022-07-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000129606A (en) * | 1998-10-20 | 2000-05-09 | Kozaburo Hayashi | Base structure |
| WO2010013242A1 (en) * | 2008-07-29 | 2010-02-04 | Alcobra Ltd. | Substituted pyridoxine-lactam carboxylate salts |
| CN102493306B (en) * | 2011-12-29 | 2013-12-04 | 中交第一公路勘察设计研究院有限公司 | Construction method of expressway insulating regulation subgrade in permafrost areas |
| RU2618108C2 (en) * | 2015-07-30 | 2017-05-02 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Дальневосточный государственный университет путей сообщения" (ДВГУПС) | Drainage system on permafrost soils |
| CN105887605B (en) * | 2016-05-06 | 2018-01-05 | 兰州交通大学 | A kind of device based on stress relief method roadbed anti-freeze expansion thaw collapse |
| CN105951553B (en) * | 2016-05-06 | 2018-04-03 | 兰州交通大学 | A kind of existing roadbed frost damage prevention device of achievable bidirectional decompression and Self-resetting |
| CN108193575A (en) * | 2017-12-20 | 2018-06-22 | 张昆 | The anti-freeze expansion structure and its paving method of seasonal frozen soil region roadbed |
| CN208632890U (en) * | 2018-04-29 | 2019-03-22 | 兰州交通大学 | A kind of anti-lifting by frost structure of seasonal frozen ground subgrade stake arch brace |
| CN109781773B (en) * | 2019-03-28 | 2021-07-09 | 凌贤长 | Detection method for realizing layered telescopic type frost heaving detection device |
| CN110284385B (en) * | 2019-07-01 | 2021-12-07 | 四川农业大学 | Anti-freeze soil road |
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