CN220908036U - Novel pile plate structure roadbed for high-speed railway fork area - Google Patents
Novel pile plate structure roadbed for high-speed railway fork area Download PDFInfo
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- CN220908036U CN220908036U CN202322354046.0U CN202322354046U CN220908036U CN 220908036 U CN220908036 U CN 220908036U CN 202322354046 U CN202322354046 U CN 202322354046U CN 220908036 U CN220908036 U CN 220908036U
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- 239000004567 concrete Substances 0.000 claims abstract description 64
- 239000004576 sand Substances 0.000 claims abstract description 60
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- 210000003205 muscle Anatomy 0.000 claims abstract 4
- 230000002787 reinforcement Effects 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract 2
- 206010024796 Logorrhoea Diseases 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 61
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
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- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a novel pile plate structure roadbed for a high-speed railway fork area, belongs to the technical field of railway roadbed structures, and solves the technical problem that the existing high-speed railway roadbed is extremely easy to generate uneven settlement in the fork area. This novel pile plate structure road bed in high-speed railway fork district, including embankment fill, rubble bed course, concrete slab, add muscle sand bed course and precast tubular pile, the garrulous stone bed course has been laid to the upside of concrete slab, and embankment fill has been laid to the upside of rubble bed course, and the downside of concrete slab is provided with a plurality of precast tubular pile, and the reinforcing sand bed course has been laid to the downside of concrete slab, and the bottom of precast tubular pile runs through the reinforcing sand bed course, and the upside evenly distributed of concrete slab has a plurality of lugs that are the pyramid. The utility model has the effects of effectively controlling uneven settlement generated in the transverse direction and the longitudinal direction of the roadbed in the high-speed railway fork area and improving the overall stability of the roadbed.
Description
Technical Field
The utility model belongs to the technical field of railway roadbed structures, and relates to a structural roadbed, in particular to a novel pile plate structural roadbed for a high-speed railway fork area.
Background
Switch is a key track device affecting train running speed, comfort and safety, and plays a very important role in high-speed railway infrastructure. Along with the large-scale operation of high-speed railways in China, under the cyclic impact action of high-speed train load, the traditional high-speed railway subgrade is extremely easy to generate the disease problem of horizontal and longitudinal uneven settlement in a bifurcation area, and light people influence riding comfort and heavy people seriously influence driving safety. The railway service department always plays bad repair work in a cyclic repetition, and therefore a great amount of manpower, material resources and financial resources are consumed.
In order to solve the problem that the traditional high-speed railway roadbed is extremely easy to generate uneven settlement diseases in a fork area, the utility model provides a novel pile plate structure roadbed for the fork area of the high-speed railway.
Disclosure of utility model
The utility model aims to solve the problems in the prior art, and provides a novel pile plate structure roadbed for a high-speed railway fork area, which aims to solve the technical problems that: how to realize the control of the uneven settlement generated in the transverse and longitudinal directions of the roadbed in the high-speed railway fork area effectively and improve the overall stability of the roadbed.
The aim of the utility model can be achieved by the following technical scheme:
The utility model provides a novel stake plate structure road bed in high-speed railway fork district, includes embankment fill, rubble bed course, concrete slab, reinforced sand bed course and precast tubular pile, broken stone bed course has been laid to the upside of concrete slab, and embankment fill has been laid to the upside of rubble bed course, and the downside of concrete slab is provided with a plurality of precast tubular piles, and reinforced sand bed course has been laid to the downside of concrete slab, and reinforced sand bed course is run through to the bottom of precast tubular pile, and the upside evenly distributed of concrete slab has a plurality of lugs that are the pyramid, and two precast tubular piles of front side and rear side extend to inside the foundation perpendicularly in the transition zone, and remaining precast tubular pile extends to inside the foundation in the slope of fork district.
The working principle of the utility model is as follows: digging a foundation trench, driving a precast tubular pile into a foundation, paving a layer of 10cm thick sand on the bottom surface of the foundation trench, paving a geogrid on the surface layer of the sand, paving 10cm thick sand on the upper part of the geogrid, completing construction of a reinforced sand cushion layer, manually chiseling bare concrete of a pile head of the precast tubular pile, erecting a template above the reinforced sand cushion layer, manufacturing a reinforced concrete slab, welding the reinforced concrete of the precast tubular pile with a reinforced skeleton of the concrete slab, pouring concrete slab, paving a 20-30cm thick gravel cushion layer on the surface of the precast tubular pile after the hardening strength of the precast tubular pile meets the requirement, paving embankment filling soil in layers, and tamping the layers in layers until the filling soil reaches the design elevation of the embankment; through the principle, the transverse differential settlement of the roadbed in the bifurcation area can be controlled within the allowable range, and the longitudinal differential settlement of the roadbed in the bifurcation area can be controlled within the allowable range.
The crushed stone cushion layer is made of strong crushed stone with good grading, and the thickness of the crushed stone cushion layer is 0.2-0.3m.
By adopting the structure, the total void ratio of the crushed stone with good grading is small, so that the crushed stone cushion layer has good strength, and the stability of the roadbed structure can be effectively improved.
The concrete slab is a cast-in-situ slab, and a steel reinforcement framework is arranged in the concrete slab.
By adopting the structure, the reinforced skeleton is arranged in the concrete slab and is matched with the cast concrete, so that the reinforced skeleton has high hardness, and the longitudinal uneven settlement of the roadbed can be effectively reduced.
The reinforced sand cushion is made of medium coarse sand with good grading and hard texture and the geogrid, and the reinforced sand cushion is formed by paving sand with the thickness of 0.1m, the geogrid and sand with the thickness of 0.1m from top to bottom in sequence.
By adopting the structure, the geogrid adopted by the reinforced sand cushion layer can not only improve the bearing capacity of the roadbed, but also effectively prevent the pavement from cracking or collapsing, thereby prolonging the service life of the roadbed.
And the concrete slab is welded and connected with the top end of the precast tubular pile through the steel reinforcement framework.
By adopting the structure, the exposed reinforced bars are welded with the reinforcement cage in the concrete slab, so that the stability of connection between the precast tubular pile and the concrete slab can be improved, and the stability of the roadbed structure is improved.
The bottom end of the precast tubular pile penetrates through the reinforced sand cushion layer and extends downwards to the bearing layer.
By adopting the structure, the precast tubular pile extends to the bearing layer, so that the precast tubular pile can support the concrete slab more stably.
The two precast tubular piles at the front side and the two precast tubular piles at the rear side are in vertical states, the rest precast tubular piles are in inclined states, and the inclination deviation of the rest precast tubular piles is not more than 15% of the tangent value of the inclination angle.
By adopting the structure, the deviation of the inclination of the precast tubular pile after being driven into the foundation is not more than 15% of the tangent value of the inclination angle, the stress of the precast tubular pile can be reduced by the angle setting, and under the interaction force between the precast tubular pile and the foundation, the anti-overturning stability of the foundation is increased jointly, the integral deformation resistance of the foundation is improved, and the uneven settlement of the roadbed is reduced.
The longitudinal pile spacing of the prefabricated pipe piles is 3-4m, and the pile diameter is not less than 0.5m.
By adopting the structure, the longitudinal pile spacing of the precast tubular piles is 3-4m, so that the mutual influence among the precast tubular piles can be effectively reduced, and the influence of the pile group effect on the reduction of the bearing capacity of the precast tubular piles is reduced.
Compared with the prior art, the novel pile plate structure roadbed for the high-speed railway fork area has the following advantages:
1. Digging a foundation trench, driving a precast tubular pile into a foundation, paving a layer of 10cm thick sand on the bottom surface of the foundation trench, paving a geogrid on the surface layer of the sand, paving 10cm thick sand on the upper part of the geogrid, completing construction of a reinforced sand cushion layer, manually chiseling bare concrete of a pile head of the precast tubular pile, erecting a template above the reinforced sand cushion layer, manufacturing a reinforced concrete slab, welding the reinforced concrete of the precast tubular pile with the reinforced concrete slab, pouring concrete slab, paving a 20-30cm thick gravel cushion layer on the surface of the precast tubular pile after the hardening strength of the precast tubular pile meets the requirement, paving embankment filling soil in layers, and tamping in layers until the embankment filling soil reaches the design elevation of the embankment; through the principle, the transverse differential settlement of the roadbed in the bifurcation area can be controlled within the allowable range, and the longitudinal differential settlement of the roadbed in the bifurcation area can be controlled within the allowable range.
2. The deviation of the inclination of the precast tubular pile after being driven into the foundation is not more than 15% of the tangent value of the inclination angle, the stress of the precast tubular pile can be reduced by the angle setting, and under the interaction force between the precast tubular pile and the foundation, the anti-overturning stability of the foundation is increased jointly, the integral deformation resistance of the foundation is improved, and uneven settlement of the roadbed is reduced.
Drawings
FIG. 1 is an overall schematic of the present utility model;
FIG. 2 is a schematic diagram of a cross-section of a roadbed in a bifurcation area according to the present utility model;
FIG. 3 is a schematic cross-sectional view of a transition zone subgrade according to the present utility model;
FIG. 4 is a schematic view of a concrete slab structure according to the present utility model;
fig. 5 is a schematic view showing the longitudinal distribution of the prefabricated pipe piles according to the present utility model.
In the figure: 1. embankment filling, 2, broken stone bedding layers, 3, concrete plates, 4, reinforced sand bedding layers, 5, prefabricated pipe piles, 6, transition areas, 7 and branch areas.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
As shown in figures 1-5, the novel pile plate structure roadbed for the high-speed railway fork area comprises embankment filling soil 1, a broken stone cushion layer 2, a concrete slab 3, a reinforced sand cushion layer 4 and precast tubular piles 5, wherein the broken stone cushion layer 2 is paved on the upper side of the concrete slab 3, the embankment filling soil 1 is paved on the upper side of the broken stone cushion layer 2, a plurality of precast tubular piles 5 are arranged on the lower side of the concrete slab 3, the reinforced sand cushion layer 4 is paved on the lower side of the concrete slab 3, the bottom ends of the precast tubular piles 5 penetrate through the reinforced sand cushion layer 4, a plurality of quadrangular cone-shaped projections are uniformly distributed on the upper side of the concrete slab 3, two precast tubular piles 5 on the front side and two precast tubular piles 5 on the rear side vertically extend into the foundation in a transition area 6, the rest precast tubular piles 5 obliquely extend into the foundation in a fork area 7, in the embodiment, a foundation trench is excavated, a precast tubular pile 5 is driven into a foundation, a layer of sand with the thickness of 10cm is paved on the bottom surface of the foundation trench, then a geogrid is paved on the surface layer of the sand, then sand with the thickness of 10cm is paved on the upper part of the geogrid, the construction of a reinforced sand cushion layer 4 is completed, exposed concrete of the pile head of the precast tubular pile 5 is manually chiseled, a template is erected above the reinforced sand cushion layer 4, the reinforcing steel bars of a concrete slab 3 are manufactured, the reinforcing steel bars of the precast tubular pile 5 are welded with the reinforcing steel bar framework of the concrete slab 3, the concrete is poured, after the hardening strength of the concrete slab 3 reaches the requirement, a 20-30cm thick gravel cushion layer 2 is paved on the surface of the concrete slab, a embankment filling 1 is paved in layers, and the layers are filled and tamped until the embankment reaches the design elevation of the embankment; through the principle, the transverse differential settlement of the roadbed in the bifurcation area can be controlled within the allowable range, and the longitudinal differential settlement of the roadbed in the bifurcation area can be controlled within the allowable range.
The crushed stone cushion layer 2 is made of well-graded and firm crushed stone, the thickness of the crushed stone cushion layer 2 is 0.2-0.3m, and in the embodiment, the total void ratio of the well-graded crushed stone is small, so that the crushed stone cushion layer 2 has good strength, and the stability of a roadbed structure can be effectively improved.
The concrete slab 3 is a cast-in-situ slab, and a reinforcement cage is arranged in the concrete slab 3, in the embodiment, the reinforcement cage is arranged in the concrete slab 3 and is matched with the cast concrete, so that the concrete slab has high hardness, and the longitudinal differential settlement of the roadbed can be effectively reduced.
The reinforced sand cushion 4 is made of medium coarse sand with good grading and hard texture and geogrid, the reinforced sand cushion 4 is formed by paving sand with the thickness of 0.1m, geogrid and sand with the thickness of 0.1m from top to bottom in sequence, in the embodiment, the geogrid adopted by the reinforced sand cushion 4 can not only improve the bearing capacity of a roadbed, but also effectively prevent pavement from cracking or collapsing, and further prolong the service life of the roadbed.
The concrete slab 3 passes through the welded connection of the top of framework of steel reinforcement and precast tubular pile 5, in this embodiment, welds the exposed steel reinforcement with the framework of steel reinforcement in the concrete slab 3 together, can improve precast tubular pile 5 and concrete slab 3 connection's stability to improve roadbed structure's stability.
The bottom end of the precast tubular pile 5 penetrates the reinforced sand cushion 4 and extends downward to the bearing layer, and in this embodiment, the precast tubular pile 5 extends to the bearing layer, so that the precast tubular pile 5 can support the concrete slab 3 more firmly.
The two precast tubular piles 5 of front side and two precast tubular piles 5 of rear side all are vertical state, and remaining precast tubular piles 5 all are the inclination state, and the deviation of the gradient of remaining precast tubular piles 5 must not be greater than 15% of inclination tangent value, in this embodiment, the deviation of gradient after precast tubular piles 5 are driven into the ground must not be greater than 15% of inclination tangent value, and such angle setting not only can reduce precast tubular piles 5 self atress, and under the interact force between precast tubular piles 5 and ground, increase the anti-overturning stability of ground jointly, improve the holistic anti-deformation ability of ground, and then reduce the uneven subsidence of road bed.
The longitudinal pile spacing of the precast tubular piles 5 is 3-4m, the pile diameter is not less than 0.5m, in the embodiment, the longitudinal pile spacing of the precast tubular piles 5 is 3-4m, the mutual influence among the precast tubular piles 5 can be effectively reduced, and the influence of the reduction of the bearing capacity of the precast tubular piles 5 caused by pile group effect is reduced.
The construction flow of the novel pile plate structure roadbed in the high-speed railway forked area of the embodiment is as follows:
And firstly, excavating a foundation trench to a designed elevation.
And secondly, driving the precast tubular pile 5 into the foundation, wherein the pile head is about 50cm higher than the bottom surface of the excavated foundation trench.
Thirdly, paving a layer of sand with the thickness of 10cm on the bottom surface of the foundation trench, paving a geogrid on the surface layer of the sand, and paving sand with the thickness of 10cm on the upper part of the geogrid to finish the construction of the reinforced sand cushion layer 4.
And fourthly, manually chiseling the exposed concrete of the pile head of the prefabricated pipe pile 5.
And fifthly, erecting a template above the reinforced sand cushion, manufacturing the steel bars of the concrete slab 3, welding the steel bars chiseled by the precast tubular piles 5 with the steel bars of the concrete slab 3, and pouring concrete to the designed elevation.
And sixthly, pouring the concrete slab 3, and paving a 20-30cm thick broken stone cushion layer on the surface of the concrete slab after the hardening strength of the concrete slab reaches the requirement.
Seventh, paving the embankment filling 1 in layers, and tamping in layers until the filling reaches the embankment design elevation.
The foundation trench is excavated, the precast tubular pile 5 is driven into the foundation, the deviation of the inclination of the precast tubular pile 5 after being driven into the foundation is not more than 15% of the tangent value of the inclination angle, the angle setting can reduce the stress of the precast tubular pile 5, under the interaction force between the precast tubular pile 5 and the foundation, the anti-overturning stability of the foundation is increased jointly, the integral anti-deformation capacity of the foundation is improved, uneven settlement of the foundation is further reduced, a layer of 10cm thick sand is paved on the bottom surface of the foundation trench, then a geogrid is paved on the surface layer of the sand, then the sand with the thickness of 10cm is paved on the upper portion of the geogrid, the construction of a reinforced sand cushion layer 4 is completed, the geogrid adopted by the reinforced sand cushion layer 4 can not only improve the bearing capacity of the foundation, but also can effectively prevent the pavement from cracking or collapsing, further prolong the service life of the foundation, the exposed concrete of the pile head of the precast tubular pile 5 is manually chiseled, a template is built above the reinforced sand cushion layer, the concrete slab 3 is manufactured, the open of the tubular pile 5 is welded with the concrete slab 3, the exposed reinforced pile 3 is paved on the bottom surface of the foundation is paved, the layer is paved with the reinforced pile 3, the reinforcement cushion layer is hardened, the reinforcement structure is filled with the layer is 2 cm, the reinforcement layer is paved, the reinforcement layer is filled with the layer is 3, the layer is paved, the stability is the reinforcement layer is filled, the layer is 20, the stability is paved, the layer is the stability is paved, the stability is 20 is filled, and the layer is 20, and the stability is paved, and the layer is 20 is filled with the layer.
In conclusion, through the cooperation of structures such as embankment filling, rubble bed course, concrete slab, reinforced sand bed course and prefabricated tubular pile, realize effectively controlling the horizontal and vertical inhomogeneous subsidence that produces of high-speed railway fork district road bed, improve the holistic stability of road bed.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (8)
1. The utility model provides a novel stake plate structure road bed in high-speed railway fork district, includes embankment fill (1), rubble bed course (2), concrete slab (3), adds muscle sand bed course (4) and precast tubular pile (5), a serial communication port, rubble bed course (2) have been laid to the upside of concrete slab (3), embankment fill (1) have been laid to the upside of rubble bed course (2), the downside of concrete slab (3) is provided with a plurality of precast tubular piles (5), the downside of concrete slab (3) has been laid and has added muscle sand bed course (4), the bottom of precast tubular pile (5) runs through and adds muscle sand bed course (4), the upside evenly distributed of concrete slab (3) has a plurality of lugs that are the quadrangular taper, two precast tubular piles (5) of front side and rear side extend to inside the foundation perpendicularly in transition zone (6), other precast tubular pile (5) incline and extend to inside the foundation in fork district (7).
2. The novel pile plate structure roadbed for the high-speed railway turnout area according to claim 1, wherein the crushed stone cushion layer (2) is made of well-graded and firm crushed stone, and the thickness of the crushed stone cushion layer (2) is 0.2-0.3m.
3. The novel pile plate structure roadbed for the high-speed railway forked area according to claim 1, wherein the concrete slab (3) is a cast-in-situ slab, and a reinforcement cage is arranged inside the concrete slab (3).
4. The novel pile plate structure roadbed for the high-speed railway fork area according to claim 1, wherein the reinforced sand cushion layer (4) is made of medium coarse sand with good grading and hard texture and a geogrid, and the reinforced sand cushion layer (4) is formed by paving sand with the thickness of 0.1m, the geogrid and sand with the thickness of 0.1m from top to bottom in sequence.
5. A novel pile plate structure roadbed for a high-speed railway fork area according to claim 3, wherein the concrete slab (3) is welded and connected with the top end of the precast tubular pile (5) through a reinforcement cage.
6. The roadbed with the novel pile plate structure for the high-speed railway forked area according to claim 5 is characterized in that the bottom end of the precast tubular pile (5) penetrates through the reinforced sand cushion layer (4) and extends downwards to the bearing layer.
7. The roadbed of a novel pile structure for a high-speed railway fork area according to claim 5, wherein two precast tubular piles (5) at the front side and two precast tubular piles (5) at the rear side are all in a vertical state, the rest precast tubular piles (5) are all in an inclined state, and the inclination deviation of the rest precast tubular piles (5) is not more than 15% of the tangent value of the inclination angle.
8. The novel pile plate structure roadbed for the high-speed railway forked area according to claim 7, wherein the longitudinal pile spacing of the prefabricated pipe piles (5) is 3-4m, and the pile diameter is not less than 0.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322354046.0U CN220908036U (en) | 2023-08-31 | 2023-08-31 | Novel pile plate structure roadbed for high-speed railway fork area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322354046.0U CN220908036U (en) | 2023-08-31 | 2023-08-31 | Novel pile plate structure roadbed for high-speed railway fork area |
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| CN220908036U true CN220908036U (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322354046.0U Active CN220908036U (en) | 2023-08-31 | 2023-08-31 | Novel pile plate structure roadbed for high-speed railway fork area |
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| CN (1) | CN220908036U (en) |
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2023
- 2023-08-31 CN CN202322354046.0U patent/CN220908036U/en active Active
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