CN211848680U - Steel plate structure and steel plate pavement structure - Google Patents
Steel plate structure and steel plate pavement structure Download PDFInfo
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- CN211848680U CN211848680U CN201922127604.3U CN201922127604U CN211848680U CN 211848680 U CN211848680 U CN 211848680U CN 201922127604 U CN201922127604 U CN 201922127604U CN 211848680 U CN211848680 U CN 211848680U
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Abstract
The utility model discloses a steel plate structure and a steel plate pavement structure, wherein the steel plate structure comprises a bottom plate, a top plate, a lap plate and a rib plate; the bottom plate and the top plate are consistent in specification and parallel to each other, and the rib plates are positioned between the bottom plate and the top plate and are respectively fixedly connected with the bottom plate and the top plate; one end of the lap plate is positioned below the first wide edge end of the top plate and is fixedly connected with the top plate, and the other end of the lap plate extends out of the first wide edge end of the top plate and is provided with a threaded hole I; a plurality of lap plates are arranged in parallel at equal intervals along the wide edge direction of the top plate. The steel plate pavement structure comprises a steel plate surface layer, a replacement soil layer and a soil foundation which are arranged from top to bottom; the steel plate surface layer is formed by splicing a plurality of steel plate structures. The invention can relieve the adverse effect of uneven modulus of the lower lying layer on the service performance of the upper pavement structure to the maximum extent when being used in a low-embankment or non-embankment pavement structure.
Description
Technical Field
The utility model relates to a steel sheet structure and steel sheet road surface structure belongs to highway road surface engineering technical field.
Background
At present, for the definition of a low embankment, a unified standard is not formed yet due to factors such as regions, and an embankment with a fill height of less than 2.5m is generally called a low embankment. After the embankment filling height is reduced, the traffic load will inevitably influence the foundation soil layer within a certain thickness range. Therefore, before traffic facilities such as roads, railways and even airport runways are built, some measures such as preloading, vacuum preloading, compound vacuum preloading, drainage consolidation and the like are generally adopted to work for a long time so as to eliminate most consolidation deformation and consolidation settlement. However, traffic loads can have a significant impact on the soft clay subgrade of low-embankment highways during use. The reduction in the embankment filling height may reduce the ability of the subgrade filling to resist uneven settlement, which may easily result in uneven settlement.
At present, highway subgrades in developed countries are generally low in height, and the average height is about 0.5-1.0 m. For example, germany, france, along the route of highway roads from germany to france, the roadbed is almost at the same level with the surrounding ground. The land bed has less earth and stone volume, so that soil taking pits can not be seen on two sides, and wild animals can conveniently pass through the road; for example, in the netherlands with developed traffic and dense highway networks, the low embankments are adopted for rural roads and expressways, and the height of the embankments is generally not more than lm except for bridge connections. The reason why the Dutch adopts the low embankment is that the Dutch is lack of land resources and low-lying, and the soil used for the roadbed is generally obtained nearby; in addition, the linear indexes of the expressway are far lower than those of China, the linear selection is natural, the expressway is harmonious with the environment, the design is suitable according to the local conditions, the phenomenon of large filling and large digging is avoided, and the expressway is beneficial to reducing the damage to the landform.
Nowadays, low embankment design schemes are used in a plurality of road sections in China, such as Jinqing highways in Shandong province, Huanning highways, Qingyin highways, Subei city-winding highways in Jiangsu province, and Yangtong high-speed Tongzhou sections, but the traditional technical schemes for low embankment road surface structures in soft soil areas at home and abroad focus on modification of roadbed soil or enhancement of embankment bearing capacity by adopting geogrids. From the application effect, these two kinds of schemes can guarantee the bearing capacity and the deformation of road bed in short term and satisfy the demands, but because two kinds of schemes can't block the migration of moisture in the roadbed soil, long-term effect can not guarantee, and the deformation and the intensity problem of the special soil foundation of low embankment are very outstanding moreover, and the special soil foundation soil body can produce inhomogeneous deformation or structural destruction under the temperature humidity condition of difference.
The special soil foundation mainly comprises frozen soil, soft soil, expansive soil and the like. The frozen soil contains abundant underground ice, is a soil body medium which is extremely sensitive to temperature, has the characteristic that the long-term strength is far lower than the instantaneous strength, and faces the problems of frost heaving and thaw collapse. Meanwhile, the heat exchange relation between the earth surface and the atmosphere is changed by building the road, so that the heat absorption capacity of the embankment is changed, the natural upper limit of permafrost under the roadbed is changed, and the damage of the pavement structure caused by the uneven deformation of the bottom of the roadbed facing the highway is aggravated. In order to reduce the influence of temperature on permafrost below a roadbed, a highway in a frozen soil area basically adopts a high fill embankment and auxiliary facilities with heat dissipation and heat insulation functions, such as a hot rod, a ventilation pipe, an XPS heat insulation plate and the like; the soft soil has the characteristics of high natural water content, high compressibility, low shear strength, high disturbance and high sensitivity, and has large and uneven deformation under the action of load, long deformation stability and low total bearing capacity. The method for improving the compressibility and strength of the soil foundation and treating the soft soil foundation mainly comprises shallow burying of the light foundation, piling of a sheet pile foundation around the soil foundation, replacement and filling of shallow soft soil, drainage consolidation, additive doping and the like; the expansive soil has the characteristics of obvious expansion and shrinkage, water absorption expansion, disintegration or softening in water, water loss shrinkage and poor scouring resistance, and the strength of the soil body is attenuated by long-term repeated expansion and shrinkage. Seasonal humidity changes often cause deformation cracking and even severe damage to the road. The method for treating the expansive soil foundation by waterproofing and moisturizing and improving strength mainly comprises the steps of increasing foundation burial depth, adding settlement joints, adopting buttress plate foundations or pile foundations, arranging a waterproof layer, doping additives and the like.
The special soil foundation treatment projects all have the defects of long construction period, high construction cost and difficult maintenance and repair. In recent years, rapid development of heat insulation materials and waterproof materials provides a new idea for the stability problem of special soil affected by temperature and humidity, and the stability of a special soil foundation is ensured without a high-fill embankment form, a large amount of replacement and filling and additional heat dissipation, heat insulation and drainage auxiliary facilities, so that the height of a road surface structure is reduced, the construction cost is reduced, the construction period is greatly shortened, and a low embankment or embankment-free road surface structure adaptive to the special soil foundation is still lacked.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a steel sheet structure and steel sheet road surface structure to exist not enough among the prior art, use this steel sheet road surface structure can carry out the dispersion of bigger area to the inhomogeneous settlement of ground and frost heaving stress in the road surface structure of low embankment or no embankment, and the adverse effect to upper portion road surface structure performance of being on active service that the bedding modulus is inhomogeneous is alleviated to the at utmost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a steel plate structure comprises a bottom plate, a top plate, a lap plate and a rib plate; the bottom plate, the top plate, the lap plate and the rib plate are all rectangular steel plates; the bottom plate and the top plate are consistent in specification and parallel to each other, and the rib plates are positioned between the bottom plate and the top plate and are respectively fixedly connected with the bottom plate and the top plate; one end of the lap plate is positioned below the first wide edge end of the top plate and is fixedly connected with the top plate, and the other end of the lap plate extends out of the first wide edge end of the top plate and is provided with a threaded hole I; a plurality of lap plates are arranged in parallel at equal intervals along the wide edge direction of the top plate; the second wide edge end of the top plate is provided with grooves with the same number as the lap joint plates, and the bottom surfaces of the grooves are provided with threaded holes II penetrating through the top plate; when two steel sheet components splice, the second broadside end of first roof is placed on the overlap joint board of second roof, and screw hole II on the first roof coincides mutually and passes through bolt fixed connection with screw hole I on the overlap joint board of second roof.
Furthermore, the ribbed plates are perpendicular to the bottom plate and the top plate along the wide side direction of the bottom plate, and a plurality of ribbed plates are arranged in parallel at equal intervals along the long side direction of the bottom plate.
Furthermore, the length of the long side of the bottom plate is 5000-10000 mm, the length of the wide side is 3500-5000 mm, and the thickness is 4-10 mm.
Further, the length of the long side of the bottom plate is 8000mm, the length of the wide side is the width of the road width, and the thickness is 6 mm.
Furthermore, the length of the long edge of the lapping plate is 250mm, the length of the wide edge is 150-250 mm, and the thickness is 100 mm.
Furthermore, the length of the long edge and the wide edge of each rib plate is 200mm, the thickness of each rib plate is 6mm, and a plurality of rib plates are arranged in parallel along the long edge direction of the bottom plate at intervals of 250 mm.
Further, the steel sheet structure still includes a plurality of hoist and mount piece, hoist and mount piece is the cube structure, the one end of hoist and mount piece is inserted in roof, bottom plate and two rectangular holes that the floor encloses, the upper surface of the other end of hoist and mount piece is equipped with the hoist and mount ear hole board of taking the hoist and mount ear hole, the horizontal position that the centre of a circle position of hoist and mount ear hole is higher than the roof.
Furthermore, any two of the top plate, the bottom plate, the rib plate and the lapping plate are fixedly connected in a welding mode.
A steel plate pavement structure comprises a steel plate surface layer, a replacement soil layer and a soil foundation which are arranged from top to bottom; the steel plate surface layer is formed by splicing a plurality of steel plate structures.
Furthermore, road shoulders are distributed on two sides of the steel plate surface layer. Drainage facilities can be arranged in the road shoulder.
Furthermore, an embankment is arranged between the steel plate surface layer and the replacement filling layer, and the height of the embankment is less than 1000 mm; and a functional layer is arranged between the soil replacement and filling layer and the soil foundation, and a heat insulation material or a waterproof material is horizontally laid in the functional layer. The arrangement of the heat insulation material ensures that the underground ice is not melted by heat and the upper limit of the frozen soil is not raised due to the use of roads; and a waterproof layer is arranged to prevent the larger humidity change of the lower expansive soil foundation.
The construction method of the steel plate pavement structure comprises the following steps:
(1) carrying out soil foundation construction according to the conventional technical specification, laying a thermal insulation material or a waterproof material on the soil foundation according to the type of the soil foundation to serve as a functional layer, and then carrying out soil layer replacement construction on the functional layer, specifically backfilling with soil and stones with good stability in the roadbed range, compacting or tamping, and simultaneously carrying out embankment construction if necessary;
(2) the steel plate surface construction is carried out on a filling layer or an embankment, specifically, a plurality of steel plate structures are prefabricated firstly, then a plurality of hoisting pieces are respectively arranged on two sides of the steel plate structures in equal quantity and equal distance, then the hoisting pieces are inserted into a rectangular hole formed by a top plate, a bottom plate and two rib plates of the steel plate structures, hoisting ropes are used for connecting hoisting lug holes of the hoisting pieces, the steel plate structures are hoisted to a designed position on a road surface to be spliced with adjacent steel plate structures, a second wide edge end of the top plate of one steel plate structure is overlapped with a lap plate of the other steel plate structure up and down, a threaded hole II of the second wide edge end of the top plate of one steel plate structure is aligned with a threaded hole I of the lap plate of the other steel plate structure, a bolt is screwed into the threaded hole II and the threaded hole I from top to bottom, and the upper end of, then taking out the hoisting piece for hoisting and splicing the subsequent steel plate structure until the whole steel plate surface layer is laid;
(3) and constructing road shoulders and drainage facilities on two sides of the paved steel plate surface layer according to the conventional technical specifications.
Compared with the prior art, the technical scheme has the following beneficial effects:
1. the utility model provides a steel plate pavement structure, which can not only disperse the uneven settlement and frost heaving stress of the foundation in a larger area in the low embankment pavement structure, and furthest relieve the adverse effect of uneven modulus of the lower lying layer on the service performance of the upper pavement structure; and the existence of the steel plate layer can completely prevent the roadbed water from migrating to the upper structure, and surface water seeped downwards by the pavement structure can also be transversely discharged out of the pavement structure through the steel plate layer, so that the water stability of the low-embankment pavement structure is effectively guaranteed, and the arrangement of the steel plate surface low-embankment pavement structure has a very wide application prospect.
2. The utility model discloses utilize the high strength of steel sheet surface course, guaranteed to have better roughness and durability under the uneven deformation of special soil foundation wantonly, the deformation and the intensity of special soil foundation all accord with the standard requirement are ensured in the design of overall structure layer.
3. The novel steel plate surface layer is prefabricated and assembled, so that the surface layer construction efficiency is improved; the hoisting piece can be flexibly inserted into the two sides of the steel plate assembly according to hoisting requirements, the steel plate assembly is fixed by the hidden bolts, the flatness of a surface layer is guaranteed, the hoisting piece is easy to detach and install, and convenience is brought to maintenance and repair of a road in a use stage. The steel plate pavement structure does not need to be provided with a high fill embankment under the condition of meeting the safety and pavement use requirements, so that the height of the pavement structure on the traditional special soil foundation and the construction cost are reduced; the prefabricated assembled steel plate surface layer optimizes the construction scheme, shortens the construction period and is convenient for later maintenance and repair; in addition, the hoisting piece and the damaged steel plate assembly can be recycled, inconvenience and material waste caused by traditional welding and assembling are avoided, and the environment-friendly and energy-saving concept is met.
Drawings
Fig. 1 is a schematic view of the splice between two steel plate members as described in example 1.
Fig. 2 is a schematic structural diagram of the steel plate pavement structure in the embodiment 1.
Fig. 3 is a schematic structural view of the steel plate member according to example 1.
Figure 4 is a schematic structural view of the sling according to example 1.
Figure 5 is a schematic representation of the use of the sling according to example 1.
FIG. 6 is a graph of the daily change of the different depths of the steel plate pavement structure in the embodiment 1, wherein a curve 1 represents a depth of 0-20 cm, a curve 2 represents a depth of 30cm, a curve 3 represents a depth of 40cm, and a curve 4 represents a depth of 50 cm.
Reference numerals: the steel plate comprises a steel plate surface layer 1, a road shoulder 2, a backfill layer 3, a functional layer 4, a soil foundation 5, a top plate 11, a bottom plate 12, a rib plate 13, threaded holes II 14, threaded holes II 15, lap plates 16, bolts 17, a hoisting piece 18, a hoisting ear hole plate 19, a first wide edge end 20, a second wide edge end 21 and threaded holes I.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, but the present invention is not limited to the examples. The specific experimental conditions and methods not indicated in the following examples are generally conventional means well known to those skilled in the art.
Example 1:
as shown in fig. 3, a steel plate structure includes a bottom plate 12, a top plate 11, a lap plate 15, and a rib plate 13; the bottom plate 12, the top plate 11, the lapping plates 15 and the rib plates 13 are all rectangular steel plate elements; the bottom plate 12 and the top plate 11 have the same specification and are parallel to each other, and the rib plate 13 is positioned between the bottom plate 12 and the top plate 11 and is fixedly connected with the bottom plate 12 and the top plate 11 respectively; one end of the bridging plate 15 is positioned below the first wide edge 19 of the top plate 11 and is fixedly connected with the top plate 11, and the other end of the bridging plate 15 extends out of the first wide edge 19 of the top plate 11 and is provided with a threaded hole I21; a plurality of lapping plates 15 are arranged in parallel at equal intervals along the width direction of the top plate 11; the second wide edge end 20 of the top plate 11 is provided with grooves with the same number as the lapping plates 15, and the bottom surfaces of the grooves are provided with threaded holes II 14 penetrating through the top plate 11; when two steel plate components are spliced, the second wide edge end 20 of the first top plate 11 is placed on the lapping plate 15 of the second top plate 11, and the threaded hole II 14 in the first top plate 11 is overlapped with the threaded hole I21 in the lapping plate 15 of the second top plate 11 and fixedly connected through the bolt 16; the ribbed plate 13 is perpendicular to the bottom plate 12 and the top plate 11 along the width direction of the bottom plate 12, and a plurality of ribbed plates 13 are arranged in parallel at equal intervals along the long side direction of the bottom plate 12; the length of the long side of the bottom plate 12 is 8000mm, the length of the wide side is the width of the road width, and the thickness is 6 mm; the length of the long side of the lapping plate 15 is 250mm, the length of the wide side is 200mm, and the thickness is 100 mm; the length of the long side and the wide side of the ribbed plate 13 is 200mm, the thickness is 6mm, and a plurality of ribbed plates 13 are arranged in parallel along the long side direction of the bottom plate 12 at intervals of 250 mm; the steel plate structure further comprises a plurality of hoisting pieces 17, as shown in figure 4, each hoisting piece 17 is of a cubic structure, one end of each hoisting piece 17 is inserted into a rectangular hole formed by the top plate 11, the bottom plate 12 and the two rib plates 13, a hoisting lug hole plate 18 with a hoisting lug hole is arranged on the upper surface of the other end of each hoisting piece 17, and the circle center position of each hoisting lug hole is higher than the horizontal position of the top plate 11; and any two of the top plate 11, the bottom plate 12, the rib plate 13 and the lapping plate 15 are fixedly connected by adopting a welding mode.
As shown in the attached figure 2, the steel plate pavement structure comprises a steel plate surface layer 1 with the thickness of 20cm, a replacement soil layer 3 with the thickness of 30cm and a soil foundation 5 which are arranged from top to bottom; the steel plate surface layer 1 is formed by splicing a plurality of steel plate structures according to the embodiment; both sides of the steel plate surface layer 1 are also provided with road shoulders 2; an embankment with the thickness of 200cm is further arranged between the steel plate surface layer 1 and the replacement and filling soil layer 3; and a functional layer 4 with the thickness of 10cm is further arranged between the soil replacement and filling layer 3 and the soil foundation 5, and heat insulation materials are horizontally laid in the functional layer 4.
The construction method of the steel plate pavement structure comprises the following steps:
(1) constructing a soil foundation 5 according to the conventional technical specification, paving a thermal insulation material or a waterproof material on the soil foundation 5 according to the type of the soil foundation 5 to serve as a functional layer 4, then performing construction of replacing a soil filling layer 3 on the functional layer 4, and particularly backfilling with soil and stones with good stability and compacting or tamping in the roadbed range, and simultaneously performing construction of a road embankment;
(2) the construction of the steel plate surface layer 1 is carried out on the embankment, specifically, a plurality of steel plate structures are prefabricated firstly, then a plurality of hoisting pieces 17 are respectively arranged on two sides of the steel plate structures in equal quantity and equal distance, as shown in figure 5, the hoisting pieces 17 are inserted into a rectangular hole formed by a top plate 11, a bottom plate 12 and two rib plates 13 of the steel plate structures, hoisting lug holes of the hoisting pieces 17 are connected by hoisting ropes, the steel plate structures are hoisted to a designed position on a road surface to be spliced with adjacent steel plate structures, as shown in figure 1, a second wide side end 20 of the top plate 11 of one steel plate structure is overlapped with a lap plate 15 of the other steel plate structure up and down, a threaded hole II 14 of the second wide side end 20 of the top plate 11 of one steel plate structure is aligned with a threaded hole I21 of the lap plate 15 of the other steel plate structure, a bolt 16 is screwed into the threaded hole II 14 and, the upper end of the bolt 16 is completely embedded into the groove above the threaded hole II 14, and then the hoisting piece 17 is taken out for hoisting and splicing of a subsequent steel plate structure until the whole steel plate surface layer 1 is laid;
(3) and (3) constructing a road shoulder 2 and a drainage facility on two sides of the laid steel plate surface layer 1 according to the conventional technical specification.
Building a steel plate road surface in a frozen soil area according to the method of the embodiment, wherein a traffic load adopts a standard axle load BZZ-100, environmental parameters adopt the daily temperature and radiation data of a Qinghai Yushu area, and thermal parameters of used main materials are shown in a table 1; the temperature field distribution characteristics of the pavement are calculated through finite elements, the temperature field distribution of the steel plate pavement structure is shown in figure 6, the influence depth of the temperature field from the top surface of the soil foundation is 44cm, the high-temperature area is located in the filling layer, and 4cm below the heat insulation layer is not influenced by surface temperature radiation. The steel plate pavement structure disperses load stress through a surface steel plate structure and shallow layer replacement and filling stabilized soil, and reduces the compressive strain of traffic load on the top surface of the soil foundation; the permafrost is enabled to generate frost heaving and thawing sinking diseases through the soil-based internal insulation layer, and the stability of the pavement structure in frozen soil areas is guaranteed.
TABLE 1 Steel plate pavement materials thermal parameters
Example 2:
a steel plate structure comprises a bottom plate 12, a top plate 11, a lapping plate 15 and a rib plate 13; the bottom plate 12, the top plate 11, the lapping plates 15 and the rib plates 13 are all rectangular steel plate elements; the bottom plate 12 and the top plate 11 have the same specification and are parallel to each other, and the rib plate 13 is positioned between the bottom plate 12 and the top plate 11 and is fixedly connected with the bottom plate 12 and the top plate 11 respectively; one end of the bridging plate 15 is positioned below the first wide edge 19 of the top plate 11 and is fixedly connected with the top plate 11, and the other end of the bridging plate 15 extends out of the first wide edge 19 of the top plate 11 and is provided with a threaded hole I21; a plurality of lapping plates 15 are arranged in parallel at equal intervals along the width direction of the top plate 11; the second wide edge end 20 of the top plate 11 is provided with grooves with the same number as the lapping plates 15, and the bottom surfaces of the grooves are provided with threaded holes II 14 penetrating through the top plate 11; when two steel plate components are spliced, the second wide edge end 20 of the first top plate 11 is placed on the lapping plate 15 of the second top plate 11, and the threaded hole II 14 in the first top plate 11 is overlapped with the threaded hole I21 in the lapping plate 15 of the second top plate 11 and fixedly connected through the bolt 16; the ribbed plate 13 is perpendicular to the bottom plate 12 and the top plate 11 along the width direction of the bottom plate 12, and a plurality of ribbed plates 13 are arranged in parallel at equal intervals along the long side direction of the bottom plate 12; the length of the long side of the bottom plate 12 is 5000mm, the length of the wide side is 3500mm, and the thickness is 4 mm; the length of the long side of the lapping plate 15 is 250mm, the length of the wide side is 150mm, and the thickness is 100 mm; the length of the long side and the wide side of the ribbed plate 13 is 200mm, the thickness is 6mm, and a plurality of ribbed plates 13 are arranged in parallel along the long side direction of the bottom plate 12 at intervals of 250 mm; the steel plate structure further comprises a plurality of hoisting pieces 17, each hoisting piece 17 is of a cubic structure, one end of each hoisting piece 17 is inserted into a rectangular hole formed by the top plate 11, the bottom plate 12 and the two rib plates 13, a hoisting ear hole plate 18 with a hoisting ear hole is arranged on the upper surface of the other end of each hoisting piece 17, and the circle center position of each hoisting ear hole is higher than the horizontal position of the top plate 11; and any two of the top plate 11, the bottom plate 12, the rib plate 13 and the lapping plate 15 are fixedly connected by adopting a welding mode.
A steel plate pavement structure comprises a steel plate surface layer 1 with the thickness of 20cm, a replacement soil layer 3 with the thickness of 30cm and a soil foundation 5 which are arranged from top to bottom; the steel plate surface layer 1 is formed by splicing a plurality of steel plate structures according to the embodiment; both sides of the steel plate surface layer 1 are also provided with road shoulders 2; an embankment with the thickness of 150cm is further arranged between the steel plate surface layer 1 and the replacement and filling soil layer 3; and treating the soil foundation 5 according to a conventional method.
The construction method of the steel plate pavement structure comprises the following steps:
(1) constructing a soil foundation 5 according to the conventional technical specification, then performing construction of a soil replacement and filling layer 3 on the soil foundation 5, particularly backfilling with soil and stones with good stability in the roadbed range, compacting or tamping, and simultaneously performing construction of an embankment;
(2) the construction method comprises the steps of prefabricating a plurality of steel plate structures on an embankment, placing a plurality of hoisting pieces 17 on two sides of each steel plate structure in equal quantity and equal distance, inserting the hoisting pieces 17 into a rectangular hole formed by a top plate 11, a bottom plate 12 and two rib plates 13 of each steel plate structure, connecting hoisting lug holes of the hoisting pieces 17 by using hoisting ropes, hoisting the steel plate structures to a road surface design position to be spliced with the adjacent steel plate structures, overlapping a second wide side end 20 of the top plate 11 of one steel plate structure and an overlapping plate 15 of the other steel plate structure up and down, aligning a threaded hole II 14 of the second wide side end 20 of the top plate 11 of one steel plate structure with a threaded hole I21 of the overlapping plate 15 of the other steel plate structure, screwing a bolt 16 into a threaded hole II 14 and the threaded hole I21 from top to bottom, and completely embedding the upper end of the bolt 16 into a groove above the threaded hole II 14, then taking out the hoisting piece 17 for hoisting and splicing the subsequent steel plate structure until the whole steel plate surface layer 1 is laid;
(3) and (3) constructing a road shoulder 2 and a drainage facility on two sides of the laid steel plate surface layer 1 according to the conventional technical specification.
According to the method of the embodiment, the steel plate pavement is built in the soft soil area, because the soft soil is greatly and unevenly deformed under the load effect, the structural design takes the structural deformation as an important index, the traffic load adopts the standard axle load BZZ-100, the steel plate pavement structure is changed and filled with stabilized soil through the surface layer steel plate structure and the shallow layer to disperse the load stress, and the compressive strain of the traffic load on the top surface of the soil foundation is reduced; the strength of the soil body is improved through soil foundation treatment, and the bearing capacity of the pavement structure in the soft soil area is guaranteed.
Example 3:
a steel plate structure comprises a bottom plate 12, a top plate 11, a lapping plate 15 and a rib plate 13; the bottom plate 12, the top plate 11, the lapping plates 15 and the rib plates 13 are all rectangular steel plate elements; the bottom plate 12 and the top plate 11 have the same specification and are parallel to each other, and the rib plate 13 is positioned between the bottom plate 12 and the top plate 11 and is fixedly connected with the bottom plate 12 and the top plate 11 respectively; one end of the bridging plate 15 is positioned below the first wide edge 19 of the top plate 11 and is fixedly connected with the top plate 11, and the other end of the bridging plate 15 extends out of the first wide edge 19 of the top plate 11 and is provided with a threaded hole I21; a plurality of lapping plates 15 are arranged in parallel at equal intervals along the width direction of the top plate 11; the second wide edge end 20 of the top plate 11 is provided with grooves with the same number as the lapping plates 15, and the bottom surfaces of the grooves are provided with threaded holes II 14 penetrating through the top plate 11; when two steel plate components are spliced, the second wide edge end 20 of the first top plate 11 is placed on the lapping plate 15 of the second top plate 11, and the threaded hole II 14 in the first top plate 11 is overlapped with the threaded hole I21 in the lapping plate 15 of the second top plate 11 and fixedly connected through the bolt 16; the ribbed plate 13 is perpendicular to the bottom plate 12 and the top plate 11 along the width direction of the bottom plate 12, and a plurality of ribbed plates 13 are arranged in parallel at equal intervals along the long side direction of the bottom plate 12; the length of the long side of the bottom plate 12 is 10000mm, the length of the wide side is 5000mm, and the thickness is 10 mm; the length of the long side of the lapping plate 15 is 250mm, the length of the wide side is 250mm, and the thickness is 100 mm; the length of the long side and the wide side of the ribbed plate 13 is 200mm, the thickness is 6mm, and a plurality of ribbed plates 13 are arranged in parallel along the long side direction of the bottom plate 12 at intervals of 250 mm; the steel plate structure further comprises a plurality of hoisting pieces 17, each hoisting piece 17 is of a cubic structure, one end of each hoisting piece 17 is inserted into a rectangular hole formed by the top plate 11, the bottom plate 12 and the two rib plates 13, a hoisting ear hole plate 18 with a hoisting ear hole is arranged on the upper surface of the other end of each hoisting piece 17, and the circle center position of each hoisting ear hole is higher than the horizontal position of the top plate 11; and any two of the top plate 11, the bottom plate 12, the rib plate 13 and the lapping plate 15 are fixedly connected by adopting a welding mode.
A steel plate pavement structure comprises a steel plate surface layer 1 with the thickness of 20cm, a replacement soil layer 3 with the thickness of 30cm and a soil foundation 5 which are arranged from top to bottom; the steel plate surface layer 1 is formed by splicing a plurality of steel plate structures according to the embodiment; both sides of the steel plate surface layer 1 are also provided with road shoulders 2; and a functional layer 4 with the thickness of 10cm is further arranged between the soil replacement and filling layer 3 and the soil foundation 5, and waterproof materials are flatly laid in the functional layer 4.
The construction method of the steel plate pavement structure comprises the following steps:
(1) constructing a soil foundation 5 according to the conventional technical specification, laying a waterproof material on the soil foundation 5 according to the type of the soil foundation 5 to serve as a functional layer 4, and then performing construction of a soil replacement and filling layer 3 on the functional layer 4, specifically backfilling with soil and stones with good stability in the roadbed range and compacting or tamping;
(2) the construction of the steel plate surface layer 1 is carried out on the filling layer 3, specifically, a plurality of steel plate structures are prefabricated firstly, then a plurality of hoisting pieces 17 are respectively arranged on two sides of the steel plate structures in equal quantity and equal distance, then the hoisting pieces 17 are inserted into a rectangular hole surrounded by a top plate 11, a bottom plate 12 and two rib plates 13 of the steel plate structures, hoisting ear holes of the hoisting pieces 17 are connected by hoisting ropes, the steel plate structures are hoisted to a road surface design position to be spliced with the adjacent steel plate structures, a second wide side end 20 of the top plate 11 of one steel plate structure is overlapped with a lapping plate 15 of the other steel plate structure up and down, then a threaded hole II 14 of the second wide side end 20 of the top plate 11 of one steel plate structure is aligned with a threaded hole I21 of the lapping plate 15 of the other steel plate structure, a bolt 16 is screwed into the threaded hole II 14 and the threaded hole I21 from top to bottom, and the upper end of the bolt 16 is, then taking out the hoisting piece 17 for hoisting and splicing the subsequent steel plate structure until the whole steel plate surface layer 1 is laid;
(3) and (3) constructing a road shoulder 2 and a drainage facility on two sides of the laid steel plate surface layer 1 according to the conventional technical specification.
Building a steel plate pavement in the expansive soil area according to the method in the embodiment, because the volume of the expansive soil can generate huge volume deformation due to the change of internal humidity, the structural design takes the influence of humidity as an important index, the traffic load adopts standard axle load BZZ-100, and the steel plate pavement structure is filled with stabilized soil through a surface layer steel plate structure and a shallow layer to disperse load stress, so that the compressive strain of the traffic load on the top surface of the soil foundation is reduced; the moisture in the soil body is not greatly changed through the waterproof layer in the soil foundation, and the volume stability of the pavement structure in the expansive soil area is guaranteed.
Experimental example:
the method comprises the steps of designing 5 different steel plate surface layer structure schemes, calculating the maximum stress, the strain and the vertical displacement of each structure scheme under the action of standard axle load BZZ-100 through finite element software, and comparing the maximum stress, the strain and the vertical displacement with the stress performance of a single-layer steel plate with equivalent thickness, wherein the 5 design schemes and the analysis result thereof are shown in Table 1.
TABLE 1 Steel plate Sandwich Structure mechanical analysis and calculation results
According to above data analysis, the stress strain average of each scheme is far less than the atress limit of steel, and the key index of scheme selection is the vertical displacement of structure under standard axle load, the utility model discloses the structure of the double-deck board of chooseing for use with the diaphragm rib board is optimal scheme, and its structure is inside to have reduced 25% the biggest vertical deformation, and main atress component is the diaphragm rib board, and the stress maximum value is located the floor middle part, and the requirement of design intensity can be satisfied according to the traffic conditions adjustment diaphragm rib board thickness of difference.
The present invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (9)
1. A steel plate structure characterized in that: comprises a bottom plate (12), a top plate (11), a lapping plate (15) and a ribbed plate (13); the bottom plate (12), the top plate (11), the lapping plate (15) and the rib plate (13) are all rectangular steel plates; the bottom plate (12) and the top plate (11) are consistent in specification and parallel to each other, and the rib plate (13) is positioned between the bottom plate (12) and the top plate (11) and is fixedly connected with the bottom plate (12) and the top plate (11) respectively; one end of the bridging plate (15) is positioned below the first wide edge end (19) of the top plate (11) and is fixedly connected with the top plate (11), and the other end of the bridging plate (15) extends out of the first wide edge end (19) of the top plate (11) and is provided with a threaded hole I (21); a plurality of lapping plates (15) are arranged in parallel at equal intervals along the width direction of the top plate (11); grooves with the same number as the lap plates (15) are formed in the second wide edge end (20) of the top plate (11), and threaded holes II (14) penetrating through the top plate (11) are formed in the bottom surfaces of the grooves; when the two steel plate components are spliced, the second wide side end (20) of the first top plate (11) is placed on the lapping plate (15) of the second top plate (11), and the threaded hole II (14) in the first top plate (11) is overlapped with the threaded hole I (21) in the lapping plate (15) of the second top plate (11) and fixedly connected through the bolt (16).
2. The steel plate structure of claim 1, wherein: the rib plates (13) are perpendicular to the bottom plate (12) and the top plate (11) along the width direction of the bottom plate (12), and a plurality of rib plates (13) are arranged in parallel at equal intervals along the long side direction of the bottom plate (12).
3. The steel plate structure of claim 2, wherein: the length of the long side of the bottom plate (12) is 5000-10000 mm, the length of the wide side is 3500-5000 mm, and the thickness is 4-10 mm; the length of the long edge of the lapping plate (15) is 250mm, the length of the wide edge is 150-250 mm, and the thickness is 100 mm.
4. The steel plate structure according to claim 2 or 3, wherein: the length of the long side and the wide side of the ribbed plate (13) is 200mm, the thickness of the ribbed plate is 6mm, and a plurality of ribbed plates (13) are arranged in parallel along the long side direction of the bottom plate (12) at intervals of 250 mm.
5. The steel plate structure of claim 4, wherein: the steel sheet structure still includes a plurality of hoist and mount piece (17), hoist and mount piece (17) are the cube structure, the one end of hoist and mount piece (17) is inserted in roof (11), bottom plate (12) and two floor (13) rectangular holes that enclose, the upper surface of the other end of hoist and mount piece (17) is equipped with hoist and mount ear hole board (18) of taking hoist and mount ear hole, the horizontal position that hoist and mount ear hole centre of a circle position is higher than roof (11).
6. The steel sheet structure of claim 1, 2, 3 or 5, wherein: the top plate (11), the bottom plate (12), the rib plate (13) and the lap plate (15) are fixedly connected in a welding mode.
7. A steel sheet road surface structure which characterized in that: comprises a steel plate surface layer (1), a replacement soil layer (3) and a soil foundation (5) which are arranged from top to bottom; the steel plate surface layer (1) is formed by splicing a plurality of steel plate structures according to claims 1-6.
8. The steel plate pavement structure of claim 7, wherein: and road shoulders (2) are further arranged on two sides of the steel plate surface layer (1).
9. The steel plate pavement structure of claim 8, wherein: an embankment is further arranged between the steel plate surface layer (1) and the replacement filling layer (3), and the height of the embankment is less than 1000 mm; functional layer (4) are still laid between soil matrix (5) and the soil replacement layer (3), functional layer (4) water tiling is equipped with thermal insulation material or waterproof material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846963A (en) * | 2019-12-03 | 2020-02-28 | 交通运输部公路科学研究所 | Steel plate structure, steel plate pavement structure and construction method thereof |
| CN113358315A (en) * | 2021-06-03 | 2021-09-07 | 中国建筑一局(集团)有限公司 | Large-scale drop test platform and installation and construction method |
| CN113804384A (en) * | 2021-08-10 | 2021-12-17 | 中国核电工程有限公司 | Rigid platform for heavy impact load test |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846963A (en) * | 2019-12-03 | 2020-02-28 | 交通运输部公路科学研究所 | Steel plate structure, steel plate pavement structure and construction method thereof |
| CN113358315A (en) * | 2021-06-03 | 2021-09-07 | 中国建筑一局(集团)有限公司 | Large-scale drop test platform and installation and construction method |
| CN113804384A (en) * | 2021-08-10 | 2021-12-17 | 中国核电工程有限公司 | Rigid platform for heavy impact load test |
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