A steel plate structure and steel plate pavement structure and construction method thereof

Abstract

The present invention discloses a steel plate structure and a steel plate pavement structure and a construction method thereof, 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 have the same specifications and are parallel to each other, the rib plate is located between the bottom plate and the top plate and is fixedly connected to the bottom plate and the top plate respectively; one end of the lap plate is located below the first wide side end of the top plate and is fixedly connected to the top plate, the other end of the lap plate extends out of the first wide side 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 side direction of the top plate. The steel plate pavement structure comprises a steel plate surface layer, a replacement soil layer and a soil base arranged from top to bottom; the steel plate surface layer is formed by splicing a plurality of steel plate structures. The present invention can be used in a pavement structure with a low embankment or without an embankment to alleviate the adverse effects of the uneven modulus of the underlying layer on the service performance of the upper pavement structure to the greatest extent.

Description

Technical Field

[0001] The invention belongs to the technical field of highway pavement engineering, and in particular relates to a steel plate structure and a steel plate pavement structure and a construction method thereof. Background Art

[0002] At present, due to geographical factors, there is no unified standard for the definition of low embankments. Generally, embankments with a fill height of less than 2.5m are called low embankments. After the height of the embankment fill is reduced, the traffic load will inevitably affect the foundation soil layer within a certain thickness range. Therefore, before building transportation facilities such as roads, railways and even airport runways, some measures are generally taken, such as preloading, vacuum preloading, compound vacuum preloading and drainage consolidation for a long time to eliminate most of the consolidation deformation and consolidation settlement. Despite this, during use, traffic loads will still have a greater impact on the soft clay base of low embankment highways. Due to the reduction in the height of the embankment fill, the ability of the roadbed fill to resist uneven settlement will be reduced, which can easily lead to uneven settlement.

[0003] At present, the roadbed height of some developed countries abroad is generally low, with an average height of about 0.5 to 1.0m. For example, in Germany and France, the roadbed of the highway along the route from Germany to France is almost on the same level as the surrounding ground. The amount of earth and stone in the flat roadbed is small, so there are no soil pits on both sides, which is also convenient for wild animals to pass through the road; for example, in the Netherlands, where transportation is developed and the highway network is dense, rural roads and highways all use low embankments, and their height is generally no more than 1 meter except for the embankments outside the bridge connection. The reason why the Netherlands uses low embankments is that the Netherlands has scarce land resources and low-lying terrain, and the soil used for the roadbed is generally obtained nearby; and in Austria, the linear indicators of its highways are far lower than those of my country. The linear selection is natural and the combination with the environment is very harmonious. The design is adapted to local conditions, and there is no large-scale filling and excavation, which is conducive to reducing damage to the landform.

[0004] At present, many sections of my country have adopted low embankment design schemes, such as the Jiqing Expressway, Shanghai-Nanjing Expressway, Qingdao-Yinchuan Expressway, Subei Ring Expressway and Tongzhou Section of Yantong Expressway in Shandong Province, but the traditional technical schemes for low embankment pavement structures in soft soil areas at home and abroad focus on the modification of subgrade soil or the use of geogrids to enhance the bearing capacity of embankments. From the application effect, these two schemes can ensure that the bearing capacity and deformation of the subgrade meet the requirements in the short term, but because both schemes cannot block the migration of water in the subgrade soil, the long-term effect cannot be guaranteed, and the deformation and strength problems of the special soil foundation of the low embankment are very prominent. The special soil foundation soil will produce uneven deformation or structural damage under different temperature and humidity conditions.

[0005] Special soil foundations mainly include frozen soil, soft soil, expansive soil and other soil foundations. Frozen soil contains abundant underground ice and is a soil medium that is extremely sensitive to temperature. It has the characteristics of long-term strength far lower than instantaneous strength and faces the problems of frost heave and thaw settlement. At the same time, the construction of roads changes the heat exchange relationship between the surface and the atmosphere, which changes the heat absorption of the embankment and thus changes the natural upper limit of the permafrost under the roadbed, exacerbating the damage to the surface structure of the highway caused by uneven deformation at the bottom of the roadbed. In order to reduce the influence of temperature on the permafrost under the roadbed, highways in frozen areas basically adopt high fill embankments and auxiliary facilities with heat dissipation and heat insulation functions such as heat rods, ventilation pipes, XPS insulation boards, etc.; soft soil has the characteristics of high natural water content, high compressibility, low shear strength, high disturbance and high sensitivity. It deforms greatly and unevenly under load, the deformation stability lasts for a long time, and the overall bearing capacity is low. The main treatment methods for improving the compressibility and strength of soft soil foundation include shallow burial of light foundation, pile foundation around the foundation, replacement of shallow soft soil, drainage consolidation, and additives. Expansive soil has obvious swelling and shrinkage, swelling when absorbing water, disintegrating or softening when exposed to water, shrinking when losing water, and poor anti-scouring ability. Long-term repeated swelling and shrinkage will cause the strength of the soil to decay. Seasonal humidity changes often cause deformation, cracking, and even serious damage to roads. The main treatment methods for waterproofing and moisturizing the expansive soil foundation and improving its strength include increasing the foundation burial depth, adding settlement joints, using pier slab foundation or pile foundation, setting up a waterproof layer, and adding additives.

[0006] The above-mentioned special soil foundation treatment projects all have the disadvantages of long construction period, high cost and difficult maintenance and repair. In recent years, the rapid development of thermal insulation materials and waterproof materials has provided new ideas for the stability of special soils affected by temperature and humidity. It is no longer necessary to use high fill embankments, a large amount of replacement fills, and additional auxiliary facilities for heat dissipation, insulation and drainage to ensure the stability of special soil foundations, thereby reducing the height of the pavement structure, reducing the project cost, and greatly shortening the construction period. However, there is still a lack of low embankment or embankment-free pavement structures suitable for special soil foundations. Summary of the invention

[0007] In view of the above-mentioned deficiencies, the present invention discloses a steel plate structure and a steel plate pavement structure and a construction method thereof. In a pavement structure with a low embankment or without an embankment, the use of the steel plate pavement structure can disperse the uneven settlement and frost heave stress of the foundation over a larger area, thereby alleviating to the greatest extent the adverse effects of the uneven modulus of the underlying layer on the service performance of the upper pavement structure.

[0008] The present invention is achieved by adopting the following technical solutions:

[0009] A steel plate structure, comprising 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 have the same specifications and are parallel to each other, the rib plate is located between the bottom plate and the top plate and is fixedly connected to the bottom plate and the top plate respectively; one end of the lap plate is located below the first wide side end of the top plate and is fixedly connected to the top plate, the other end of the lap plate extends out of the first wide side 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 side direction of the top plate; the second wide side end of the top plate is provided with grooves of the same number as the lap plates, and the bottom surface of the grooves is provided with threaded holes II penetrating the top plate; when two steel plate components are spliced, the second wide side end of the first top plate is placed on the lap plate of the second top plate, the threaded holes II on the first top plate coincide with the threaded holes I on the lap plate of the second top plate and are fixedly connected by bolts.

[0010] Furthermore, the ribs are perpendicular to the bottom plate and the top plate along the wide side direction of the bottom plate, and a plurality of ribs are arranged in parallel at equal intervals along the long side direction of the bottom plate.

[0011] Furthermore, the long side length of the bottom plate is 5000mm to 10000mm, the wide side length is 3500 to 5000mm, and the thickness is 4 to 10mm.

[0012] Furthermore, the long side length of the base plate is 8000 mm, the wide side length is the road width, and the thickness is 6 mm.

[0013] Furthermore, the lap plate has a long side length of 250 mm, a wide side length of 150 to 250 mm, and a thickness of 100 mm.

[0014] Furthermore, the length of the long side and the wide side of the rib is 200 mm, and the thickness is 6 mm. A plurality of ribs are arranged in parallel at a spacing of 250 mm along the long side direction of the bottom plate.

[0015] Furthermore, the steel plate structure also includes a number of hanging parts, each of which is a cubic structure, one end of which is inserted into a rectangular hole surrounded by a top plate, a bottom plate and two rib plates, and the upper surface of the other end of the hanging part is provided with a hanging ear hole plate with hanging ear holes, and the center position of the hanging ear holes is higher than the horizontal position of the top plate.

[0016] Furthermore, any two of the top plate, bottom plate, rib plate and lap plate are fixedly connected by welding.

[0017] A steel plate pavement structure comprises a steel plate surface layer, a replacement soil layer and a soil base arranged from top to bottom; the steel plate surface layer is formed by splicing a plurality of the steel plate structures as described above.

[0018] Furthermore, shoulders are arranged on both sides of the steel plate surface layer, and drainage facilities can be arranged in the shoulders.

[0019] Furthermore, an embankment is arranged between the steel plate surface layer and the replacement soil layer, and the height of the embankment is less than 1000mm; a functional layer is arranged between the replacement soil layer and the soil foundation, and a thermal insulation material or a waterproof material is horizontally laid in the functional layer. The thermal insulation material is arranged to ensure that the underground ice is not melted by heat and the upper limit of the frozen soil is not increased due to the use of the road; the waterproof layer is arranged to prevent the large humidity change of the swelling soil foundation below.

[0020] The construction method of the steel plate pavement structure comprises the following steps:

[0021] (1) Carry out soil foundation construction in accordance with conventional technical specifications, then lay insulation materials or waterproof materials as functional layers on the soil foundation according to the type of soil foundation, and then carry out soil replacement construction on the functional layer. Specifically, fill the roadbed with stable soil and stone and compact or tamp it. If necessary, carry out embankment construction at the same time;

[0022] (2) Carry out steel plate surface construction on the replacement soil layer or embankment, specifically, first prefabricate a number of steel plate structures, then place a number of lifting parts at equal numbers and distances on both sides of the steel plate structure, then insert the lifting parts into the rectangular hole surrounded by the top plate, bottom plate and two rib plates of the steel plate structure, and then connect the lifting ear holes of the lifting parts with lifting ropes, lift the steel plate structure to the designed position of the pavement and splice it with the adjacent steel plate structure, overlap the second wide side end of the top plate of one steel plate structure with the lap plate of another steel plate structure, and then align the threaded hole II of the second wide side end of the top plate of one steel plate structure with the threaded hole I of the lap plate of another steel plate structure, screw the bolts into the threaded holes II and I from top to bottom, and the upper ends of the bolts are completely embedded in the grooves above the threaded holes II, and then take out the lifting parts for subsequent lifting and splicing of the steel plate structures until the entire steel plate surface layer is laid;

[0023] (3) On both sides of the laid steel plate surface, the shoulders and drainage facilities shall be constructed in accordance with conventional technical specifications.

[0024] Compared with the prior art, this technical solution has the following beneficial effects:

[0025] 1. The present invention proposes a steel plate pavement structure, which is used in a pavement structure with a low embankment or no embankment. It can not only disperse the uneven settlement and frost heave stress of the foundation over a larger area, but also alleviate the adverse effect of the uneven modulus of the underlying layer on the service performance of the upper pavement structure to the greatest extent; and the presence of the steel plate surface layer can completely block the migration of moisture from the roadbed to the upper structure, and the surface water infiltrating from the pavement structure can also be laterally discharged from the pavement structure through the steel plate surface layer, effectively ensuring the water stability of the low embankment pavement structure. It can be seen that the low embankment pavement structure with a steel plate surface has a very broad application prospect.

[0026] 2. The present invention utilizes the high strength of the steel plate surface layer to ensure good flatness and durability under the uneven deformation of the special soil foundation. The design of the overall structural layer ensures that the deformation and strength of the special soil foundation meet the specification requirements.

[0027] 3. The steel plate surface layer of the present invention is assembled with a prefabricated steel plate structure, which improves the efficiency of the surface layer construction; the lifting parts can be flexibly inserted on both sides of the steel plate structure according to the lifting requirements, and the steel plate structures are fixed with hidden bolts to prevent the bolts from protruding from the surface of the top plate, thereby ensuring the flatness of the steel plate surface layer, and easy to disassemble and install, which provides convenience for maintenance and repair during the road use stage. The steel plate pavement structure does not need to set up a high fill embankment while meeting the safety and pavement use requirements, reducing the height of the road structure on the traditional special land foundation and the project cost; the prefabricated and assembled steel plate surface layer optimizes the construction plan, shortens the construction period and facilitates later maintenance and repair; in addition, the lifting parts and damaged steel plate structures can be recycled, avoiding the inconvenience and material waste caused by traditional welding and assembly, which is in line with the concept of green energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the splicing between the two steel plate structures described in Example 1.

[0029] Figure 2 It is a structural schematic diagram of the steel plate pavement structure described in Example 1.

[0030] Figure 3 It is a structural schematic diagram of the steel plate structure described in Example 1.

[0031] Figure 4 It is a schematic diagram of the structure of the lifting component described in Example 1.

[0032] Figure 5 This is a schematic diagram of the use of the lifting parts described in Example 1.

[0033] Figure 6It is a daily temperature variation diagram of the steel plate pavement structure at different depths described in Example 1, wherein curve 1 represents a depth of 0 to 20 cm, curve 2 represents a depth of 30 cm, curve 3 represents a depth of 40 cm, and curve 4 represents a depth of 50 cm.

[0034] Figure numerals: 1-steel plate surface layer, 2-shoulder, 3-replacement soil layer, 4-functional layer, 5-soil base, 11-top plate, 12-bottom plate, 13-rib plate, 14-threaded hole II, 15-lap plate, 16-bolt, 17-lifting part, 18-lifting ear hole plate, 19-first wide side end, 20-second wide side end, 21-threaded hole I. DETAILED DESCRIPTION

[0035] The present invention is further described by the following examples, but is not intended to be limiting of the present invention. Specific experimental conditions and methods not specified in the following examples are conventional methods commonly known to those skilled in the art.

[0036] Embodiment 1:

[0037] As attached Figure 3As shown, a steel plate structure comprises 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 lap plate 15 and the rib plate 13 are all rectangular steel plates; the bottom plate 12 and the top plate 11 have the same specifications and are parallel to each other, the rib plate 13 is located between the bottom plate 12 and the top plate 11 and is fixedly connected to the bottom plate 12 and the top plate 11 respectively; one end of the lap plate 15 is located below the first wide side end 19 of the top plate 11 and is fixedly connected to the top plate 11, and the other end of the lap plate 15 extends out of the first wide side end 19 of the top plate 11 and is provided with a threaded hole Ⅰ21; a plurality of lap plates 15 are arranged in parallel at equal intervals along the wide side direction of the top plate 11; a groove having the same number as the lap plate 15 is provided on the second wide side end 20 of the top plate 11, and a threaded hole Ⅱ14 penetrating the top plate 11 is provided on the bottom surface of the groove; when two steel plate components are spliced, the first piece The second wide side end 20 of the top plate 11 is placed on the lap plate 15 of the second top plate 11, and the threaded hole II 14 on the first top plate 11 coincides with the threaded hole I 21 on the lap plate 15 of the second top plate 11 and is fixedly connected by bolts 16; the rib plate 13 is perpendicular to the bottom plate 12 and the top plate 11 along the wide side 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; the long side length of the bottom plate 12 is 8000mm, the wide side length is the road width, and the thickness is 6mm; the long side length of the lap plate 15 is 250mm, the wide side length is 200mm, and the thickness is 100mm; the long side and wide side length of the rib plate 13 are 200mm, the thickness is 6mm, and a plurality of rib plates 13 are arranged in parallel at intervals of 250mm along the long side direction of the bottom plate 12; the steel plate structure also includes a plurality of hoisting parts 17, as shown in the attached Figure 4 As shown, the hanging member 17 is a cubic structure, one end of the hanging member 17 is inserted into a rectangular hole surrounded by the top plate 11, the bottom plate 12 and two ribs 13, and the upper surface of the other end of the hanging member 17 is provided with a hanging ear hole plate 18 with a hanging ear hole, and the center position of the hanging ear hole is higher than the horizontal position of the top plate 11; any two of the top plate 11, the bottom plate 12, the rib 13 and the lap plate 15 are fixedly connected by welding.

[0038] As attached Figure 2 As shown, a steel plate pavement structure comprises a 20 cm thick steel plate surface layer 1, a 30 cm thick replacement soil layer 3, and a soil base 5 arranged from top to bottom; the steel plate surface layer 1 is formed by splicing a number of steel plate structures as described in this embodiment; shoulders 2 are also arranged on both sides of the steel plate surface layer 1; a 200 cm thick embankment is also arranged between the steel plate surface layer 1 and the replacement soil layer 3; a 10 cm thick functional layer 4 is also arranged between the replacement soil layer 3 and the soil base 5, and thermal insulation material is horizontally laid in the functional layer 4.

[0039] The construction method of the steel plate pavement structure described in this embodiment comprises the following steps:

[0040] (1) The soil foundation 5 is constructed according to conventional technical specifications, and then a thermal insulation material or a waterproof material is laid on the soil foundation 5 as a functional layer 4 according to the type of the soil foundation 5. Then, a replacement soil layer 3 is constructed on the functional layer 4. Specifically, the soil and stone with good stability are backfilled and compacted or tamped within the roadbed range, and the embankment is constructed at the same time;

[0041] (2) The steel plate surface layer 1 is constructed on the embankment. Specifically, a plurality of steel plate structures are prefabricated first, and then a plurality of lifting parts 17 are placed on both sides of the steel plate structure in equal numbers and at equal distances. Figure 5 As shown, the hoisting member 17 is inserted into the rectangular hole surrounded by the top plate 11, the bottom plate 12 and the two ribs 13 of the steel plate structure, and then the hoisting ear holes of the hoisting member 17 are connected with the hoisting rope, and the steel plate structure is hoisted to the designed position of the pavement to be spliced ​​with the adjacent steel plate structure, as shown in FIG. Figure 1 As shown, the second wide side end 20 of the top plate 11 of a steel plate structure is stacked up and down with the lap plate 15 of another steel plate structure, and then the threaded hole II14 of the second wide side end 20 of the top plate 11 of the steel plate structure is aligned with the threaded hole I21 of the lap plate 15 of the other steel plate structure, and the bolt 16 is screwed into the threaded hole II14 and the threaded hole I21 from top to bottom, and the upper end of the bolt 16 is completely embedded in the groove above the threaded hole II14, and then the hoisting piece 17 is taken out for subsequent hoisting and splicing of the steel plate structure until the entire steel plate surface layer 1 is laid;

[0042] (3) On both sides of the laid steel plate surface layer 1, the shoulders 2 and drainage facilities are constructed in accordance with conventional technical specifications.

[0043] According to the method described in this embodiment, a steel plate pavement is constructed in a frozen soil area. The traffic load adopts the standard axle load BZZ-100. The environmental parameters are the daily temperature and radiation data of Yushu, Qinghai. The thermal parameters of the main materials used are shown in Table 1. The temperature field distribution characteristics of the pavement are calculated by finite element method. The temperature field distribution diagram of the steel plate pavement structure is shown in Figure 6 As shown in the figure, the temperature field influence depth from the top of the soil foundation is 44cm, the high temperature area is in the replacement layer, and the 4cm below the insulation layer is not affected by the surface temperature radiation. The steel plate pavement structure disperses the load stress through the surface steel plate structure and the shallow replacement stable soil, reducing the compressive strain caused by the traffic load on the top of the soil foundation; the permafrost produces frost heave and thaw settlement diseases through the insulation layer in the soil foundation, ensuring the stability of the pavement structure in the frozen soil area.

[0044] Table 1 Thermal parameters of steel plate pavement materials

[0045]

[0046] Embodiment 2:

[0047] A steel plate structure, comprising 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 lap plate 15, and the rib plate 13 are all rectangular steel plates; the bottom plate 12 and the top plate 11 have the same specifications and are parallel to each other, the rib plate 13 is located between the bottom plate 12 and the top plate 11 and is fixedly connected to the bottom plate 12 and the top plate 11 respectively; one end of the lap plate 15 is located below the first wide side end 19 of the top plate 11 and is fixedly connected to the top plate 11, and the other end of the lap plate 15 extends out of the first wide side end 19 of the top plate 11 19 and has a threaded hole Ⅰ21; a plurality of overlapping plates 15 are arranged in parallel at equal intervals along the wide side direction of the top plate 11; a groove equal to the number of overlapping plates 15 is opened on the second wide side end 20 of the top plate 11, and a threaded hole Ⅱ14 penetrating the top plate 11 is opened on the bottom surface of the groove; when two steel plate components are spliced, the second wide side end 20 of the first top plate 11 is placed on the overlapping plate 15 of the second top plate 11, and the threaded hole Ⅱ14 on the first top plate 11 coincides with the threaded hole Ⅰ21 on the overlapping plate 15 of the second top plate 11 and is screwed. The ribs 13 are perpendicular to the bottom plate 12 and the top plate 11 along the wide side direction of the bottom plate 12, and a plurality of ribs 13 are arranged in parallel at equal intervals along the long side direction of the bottom plate 12; the long side length of the bottom plate 12 is 5000mm, the wide side length is 3500mm, and the thickness is 4mm; the long side length of the lap plate 15 is 250mm, the wide side length is 150mm, and the thickness is 100mm; the long side and wide side length of the ribs 13 are 200mm, the thickness is 6mm, and the ribs 13 are arranged in parallel along the long side direction of the bottom plate 12 according to the ribs 13 of the top plate 11; the ribs 13 are perpendicular to the bottom plate 12 and the top plate 11 along the wide side direction of the bottom plate 12; the long side length of the bottom plate 12 is 5000mm, the wide side length is 3500mm, and the thickness is 4mm; the long side length of the lap plate 15 is 250mm, the wide side length is 150mm, and the thickness is 100mm; the long side and wide side length of the ribs 13 are 200mm, the thickness is 6mm, and the ribs 13 are arranged in parallel along the long side direction of the bottom plate 12 according to the ribs 13 of the top plate 11; ... A plurality of ribs 13 are arranged in parallel at a spacing of 250 mm; the steel plate structure also includes a plurality of hanging parts 17, which are cubic structures, one end of which is inserted into a rectangular hole surrounded by the top plate 11, the bottom plate 12 and the two ribs 13, and the upper surface of the other end of the hanging part 17 is provided with a hanging ear hole plate 18 with hanging ear holes, and the center position of the hanging ear holes is higher than the horizontal position of the top plate 11; any two of the top plate 11, the bottom plate 12, the ribs 13 and the lap plate 15 are fixedly connected by welding.

[0048] A steel plate pavement structure comprises a 20 cm thick steel plate surface layer 1, a 30 cm thick replacement soil layer 3, and a soil base 5 arranged from top to bottom; the steel plate surface layer 1 is formed by splicing a plurality of steel plate structures as described in this embodiment; shoulders 2 are also arranged on both sides of the steel plate surface layer 1; a 150 cm thick embankment is also arranged between the steel plate surface layer 1 and the replacement soil layer 3; the soil base 5 is treated according to conventional methods.

[0049] The construction method of the steel plate pavement structure described in this embodiment comprises the following steps:

[0050] (1) The soil foundation 5 is constructed according to conventional technical specifications, and then the soil replacement layer 3 is constructed on the soil foundation 5. Specifically, the soil and stone with good stability are backfilled and compacted or tamped within the roadbed range, and the embankment is constructed at the same time;

[0051] (2) The steel plate surface layer 1 is constructed on the embankment. Specifically, a plurality of steel plate structures are prefabricated first, and then a plurality of lifting parts 17 are placed on both sides of the steel plate structure at equal numbers and distances. The lifting parts 17 are then inserted into the rectangular hole surrounded by the top plate 11, the bottom plate 12 and the two ribs 13 of the steel plate structure. The lifting ears of the lifting parts 17 are connected with lifting ropes, and the steel plate structure is lifted to the designed position of the pavement and spliced ​​with the adjacent steel plate structure. The second wide side of the top plate 11 of a steel plate structure is connected to the second wide side of the top plate 11 of a steel plate structure. The end 20 of the steel plate structure is stacked up and down with the lap plate 15 of another steel plate structure, and then the threaded hole II14 of the second wide side end 20 of the top plate 11 of one steel plate structure is aligned with the threaded hole I21 of the lap plate 15 of another steel plate structure, and the bolt 16 is screwed into the threaded hole II14 and the threaded hole I21 from top to bottom, and the upper end of the bolt 16 is completely embedded in the groove above the threaded hole II14, and then the hoisting piece 17 is taken out for subsequent hoisting and splicing of the steel plate structure until the laying of the entire steel plate surface layer 1 is completed;

[0052] (3) On both sides of the laid steel plate surface layer 1, the shoulders 2 and drainage facilities are constructed in accordance with conventional technical specifications.

[0053] According to the method described in this embodiment, a steel plate pavement is constructed in a soft soil area. Since soft soil deforms greatly and unevenly under load, structural design should take structural deformation as an important indicator. The traffic load adopts the standard axle load BZZ-100. The steel plate pavement structure disperses the load stress through the surface steel plate structure and shallow replacement stabilized soil, reducing the compressive strain on the top surface of the soil base caused by the traffic load; the strength of the soil is improved through soil base treatment to ensure the bearing capacity of the pavement structure in soft soil areas.

[0054] Embodiment 3:

[0055] A steel plate structure, comprising 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 lap plate 15, and the rib plate 13 are all rectangular steel plates; the bottom plate 12 and the top plate 11 have the same specifications and are parallel to each other, the rib plate 13 is located between the bottom plate 12 and the top plate 11 and is fixedly connected to the bottom plate 12 and the top plate 11 respectively; one end of the lap plate 15 is located below the first wide side end 19 of the top plate 11 and is fixedly connected to the top plate 11, and the other end of the lap plate 15 extends out of the first wide side end 19 of the top plate 11 9 and has threaded holes Ⅰ21; a plurality of overlapping plates 15 are arranged in parallel at equal intervals along the wide side direction of the top plate 11; a groove equal to the number of overlapping plates 15 is opened on the second wide side end 20 of the top plate 11, and a threaded hole Ⅱ14 penetrating the top plate 11 is opened on the bottom surface of the groove; when two steel plate components are spliced, the second wide side end 20 of the first top plate 11 is placed on the overlapping plate 15 of the second top plate 11, and the threaded hole Ⅱ14 on the first top plate 11 coincides with the threaded hole Ⅰ21 on the overlapping plate 15 of the second top plate 11 and is fastened by bolts 16 is fixedly connected; the ribs 13 are perpendicular to the bottom plate 12 and the top plate 11 along the wide side direction of the bottom plate 12, and a plurality of ribs 13 are arranged in parallel at equal intervals along the long side direction of the bottom plate 12; the long side length of the bottom plate 12 is 10000mm, the wide side length is 5000mm, and the thickness is 10mm; the long side length of the lap plate 15 is 250mm, the wide side length is 250mm, and the thickness is 100mm; the long side and wide side length of the ribs 13 are 200mm, the thickness is 6mm, and the ribs 13 are arranged in parallel along the long side direction of the bottom plate 12 A plurality of ribs 13 are arranged in parallel at a spacing of 250 mm; the steel plate structure also includes a plurality of hanging parts 17, which are cubic structures, one end of which is inserted into a rectangular hole surrounded by the top plate 11, the bottom plate 12 and the two ribs 13, and the upper surface of the other end of the hanging part 17 is provided with a hanging ear hole plate 18 with hanging ear holes, and the center position of the hanging ear holes is higher than the horizontal position of the top plate 11; any two of the top plate 11, the bottom plate 12, the ribs 13 and the lap plate 15 are fixedly connected by welding.

[0056] A steel plate pavement structure comprises a 20 cm thick steel plate surface layer 1, a 30 cm thick replacement soil layer 3, and a soil base 5 arranged from top to bottom; the steel plate surface layer 1 is formed by splicing a plurality of steel plate structures as described in this embodiment; shoulders 2 are also arranged on both sides of the steel plate surface layer 1; a 10 cm thick functional layer 4 is also arranged between the replacement soil layer 3 and the soil base 5, and waterproof material is horizontally laid in the functional layer 4.

[0057] The construction method of the steel plate pavement structure described in this embodiment comprises the following steps:

[0058] (1) The soil foundation 5 is constructed according to conventional technical specifications, and then a waterproof material is laid on the soil foundation 5 as a functional layer 4 according to the type of the soil foundation 5, and then a replacement soil layer 3 is constructed on the functional layer 4, specifically, the soil and stone with good stability are backfilled within the roadbed range and compacted or rammed;

[0059] (2) The steel plate surface layer 1 is constructed on the replacement soil layer 3. Specifically, a plurality of steel plate structures are prefabricated first, and then a plurality of lifting parts 17 are placed on both sides of the steel plate structure in equal numbers and at equal distances. The lifting parts 17 are then inserted into the rectangular hole formed by the top plate 11, the bottom plate 12 and the two ribs 13 of the steel plate structure. The lifting ears of the lifting parts 17 are connected with lifting ropes, and the steel plate structure is lifted to the designed position of the pavement and spliced ​​with the adjacent steel plate structure. The second width of the top plate 11 of a steel plate structure is connected to the second width of the top plate 11 of a steel plate structure. The side end 20 is stacked with the lap plate 15 of another steel plate structure, and then the threaded hole II14 of the second wide side end 20 of the top plate 11 of one steel plate structure is aligned with the threaded hole I21 of the lap plate 15 of another steel plate structure, and the bolt 16 is screwed into the threaded hole II14 and the threaded hole I21 from top to bottom, and the upper end of the bolt 16 is completely embedded in the groove above the threaded hole II14, and then the hoisting piece 17 is taken out for subsequent hoisting and splicing of the steel plate structure until the entire steel plate surface layer 1 is laid;

[0060] (3) On both sides of the laid steel plate surface layer 1, the shoulders 2 and drainage facilities are constructed in accordance with conventional technical specifications.

[0061] According to the method described in this embodiment, a steel plate pavement is constructed in an expansive soil area. Since the volume of the expansive soil will produce huge volume deformation due to changes in internal humidity, the structural design should take the influence of humidity as an important indicator. The traffic load adopts the standard axle load BZZ-100. The steel plate pavement structure disperses the load stress through the surface steel plate structure and the shallow replacement stabilized soil, thereby reducing the compressive strain caused by the traffic load on the top surface of the soil base. The waterproof layer in the soil base is used to ensure that the internal humidity of the soil does not change significantly, thereby ensuring the volume stability of the pavement structure in the expansive soil area.

[0062] Experimental example:

[0063] Five different steel plate surface structure schemes were designed, and then the maximum stress, strain and vertical displacement of each structural scheme under the standard axial load BZZ-100 were calculated by finite element software, and compared with the mechanical properties of a single-layer steel plate of equivalent thickness. The five design schemes and their analysis results are shown in Table 2.

[0064] Serial number type Vertical displacement(mm) Maximum shear stress (Mpa) Maximum principal stress (Mpa) <![CDATA[Maximum shear strain E 12 > <![CDATA[Maximum principal strain E max > 1 Single layer board 1.545 0.01905 0.04726 2.38E-07 1.85E-07 2 Double layer board + steel pipe 10.23 20.85 36.22 2.61E-04 1.69E-04 3 Double-layer board + transverse rib board 0.3172 7.471 72.29 9.34E-05 4.29E-04 4 Double-layer board + grid rib board 0.3728 5.705 49.41 7.13E-05 2.08E-04 5 Double layer board + honeycomb rib board 0.4192 6.757 107.9 8.45E-05 4.68E-04

[0065] According to the above data analysis, the stress-strain levels of each scheme are far less than the stress limit of steel. The key indicator for scheme selection is the vertical displacement of the structure under the standard axle load. The double-layer plate plus transverse rib plate structure selected by the present invention is the optimal scheme. The maximum vertical deformation inside the structure is reduced by 25%. The main load-bearing component is the transverse rib plate, and the maximum stress is located in the middle of the rib plate. The thickness of the transverse rib plate can be adjusted according to different traffic conditions to meet the design strength requirements.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A construction method for a steel plate pavement structure, characterized in that: The steel plate pavement structure comprises a steel plate surface layer (1), a replacement soil layer (3), and a soil base (5) arranged from top to bottom; the steel plate surface layer (1) is formed by splicing a plurality of steel plate structures; shoulders (2) are arranged on both sides of the steel plate surface layer (1); an embankment is arranged between the steel plate surface layer (1) and the replacement soil layer (3), and the height of the embankment is less than 1000 mm; a functional layer (4) is arranged between the replacement soil layer (3) and the soil base (5), and a thermal insulation material or a waterproof material is horizontally laid in the functional layer (4); The steel plate structure comprises 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 lap plate (15), and the rib plate (13) are all rectangular steel plates; the bottom plate (12) and the top plate (11) have the same specifications and are parallel to each other; the rib plate (13) is located between the bottom plate (12) and the top plate (11) and is fixedly connected to the bottom plate (12) and the top plate (11) respectively; one end of the lap plate (15) is located below the first wide side end (19) of the top plate (11) and is fixedly connected to the top plate (11), and the other end of the lap plate (15) extends out of the first wide side end (19) of the top plate (11) and is provided with a threaded hole I (21); a plurality of lap plates (15) are arranged in parallel at equal intervals along the wide side direction of the top plate (11); ) is provided with a groove having the same number as the overlap plate (15), and a threaded hole II (14) penetrating the top plate (11) is provided on the bottom surface of the groove; when the two steel plate structures are spliced, the second wide side end (20) of the first top plate is placed on the overlap plate (15) of the second top plate, and the threaded hole II (14) on the first top plate coincides with the threaded hole I (21) on the overlap plate (15) of the second top plate and is fixedly connected by bolts (16); the rib plate (13) is perpendicular to the bottom plate (12) and the top plate (11) along the wide side 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); the thickness of the rib plate (13) is 6 mm, and a plurality of rib plates (13) are arranged in parallel at intervals of 250 mm along the long side direction of the bottom plate (12); The steel plate structure further comprises a plurality of hanging parts (17), each of which is a cubic structure, one end of each of which is inserted into a rectangular hole formed by the top plate (11), the bottom plate (12) and the two rib plates (13), and the upper surface of the other end of each of which is provided with a hanging ear hole plate (18) with hanging ear holes, wherein the center position of the hanging ear hole is higher than the horizontal position of the top plate (11); The construction method of the steel plate pavement structure comprises the following steps: S1. constructing the soil foundation (5) according to conventional technical specifications, then laying a thermal insulation material or a waterproof material as a functional layer (4) on the soil foundation (5) according to the type of the soil foundation (5), and then constructing a replacement soil layer (3) on the functional layer (4), specifically, backfilling and compacting or tamping the roadbed with soil and stone with good stability, and simultaneously constructing the embankment; S2. The steel plate surface layer (1) is constructed on the embankment. Specifically, a plurality of steel plate structures are prefabricated first, and then a plurality of lifting parts (17) are placed at equal numbers and distances on both sides of the steel plate structure. The lifting parts (17) are then inserted into a rectangular hole formed by a top plate (11), a bottom plate (12) and two ribs (13) of the steel plate structure. The lifting ears of the lifting parts (17) are connected with a lifting rope, and the steel plate structure is lifted to the designed position of the road surface and spliced ​​with the adjacent steel plate structure. The second wide side end (20) of the top plate (11) of one steel plate structure is connected to the second wide side end (20) of the top plate (11) of the steel plate structure. The lap plate (15) of another steel plate structure is stacked up and down, and then the threaded hole II (14) of the second wide side end (20) of the top plate (11) of one steel plate structure is aligned with the threaded hole I (21) of the lap plate (15) of the other steel plate structure, and the bolt (16) is screwed into the threaded hole II (14) and the threaded hole I (21) from top to bottom, and the upper end of the bolt (16) is completely embedded in the groove above the threaded hole II (14), and then the lifting piece (17) is taken out for subsequent lifting and splicing of the steel plate structure until the entire steel plate surface layer (1) is laid; S3. On both sides of the laid steel plate surface layer (1), the road shoulder (2) and drainage facilities are constructed in accordance with conventional technical specifications.

2. The construction method of the steel plate pavement structure according to claim 1, characterized in that: The base plate (12) has a long side length of 5000 mm to 10000 mm, a wide side length of 3500 mm to 5000 mm, and a thickness of 4 mm to 10 mm; the lap plate (15) has a long side length of 250 mm, a wide side length of 150 mm to 250 mm, and a thickness of 100 mm.

3. The construction method of the steel plate pavement structure according to claim 1 or 2, characterized in that: Any two of the top plate (11), the bottom plate (12), the rib plate (13), and the lap plate (15) are fixedly connected by welding.

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