Structure for preventing and treating salivary flow ice in single and small-area sash beams

Abstract

The utility model relates to the technical field of highway engineering slope protection, in particular to a salivary flow ice prevention and treatment structure in a single or small-area sash beam. Comprising sash beams, seamless steel pipes, vegetation bags, EPS insulation boards, composite geomembranes and the like. The seamless steel pipe is arranged above a top cross beam of the sash beam, the perforated PE pipe is arranged in the side slope and is connected with the blind ditch, the alloy gabion is built in the area of the perforated PE pipe, and the composite geomembrane and the EPS insulation board are sequentially laid on the surface of the alloy gabion. And steps, dry rubbles, cast-in-place C20 concrete side ditches, plain soil backfilling and the like are arranged. According to the structure, through the synergistic effect of all the components, slope catchment water can be effectively discharged, the underground water level is lowered, and salivary flow ice is reduced; the insulation board and the composite geomembrane prevent heat loss and moisture infiltration; the seamless steel pipes and the alloy gabions enhance the slope stability; the vegetation bags achieve slope greening protection, comprehensively solve the problem of salivary flow ice and guarantee highway safety and slope stability.

Description

Technical Field

[0001] This utility model relates to the field of slope protection technology in highway engineering, and in particular to a structure for preventing ice flow inside single and small-area frame beams. Background Technology

[0002] Flowing ice is one of the major hazards encountered in highway engineering in seasonally frozen soil areas. In cold climates, excavated slopes of highways cut off underground aquifers. As temperatures drop, the surface freezes downwards, and the seasonal freeze-thaw cycle changes, transforming the previously unfrozen groundwater into confined water. As the upper frozen layer thickens and the cross-sectional area decreases, the pressure of this confined water gradually increases. It is squeezed out at weak points in the surface cap layer or broken by the water head pressure, causing groundwater to flow out and spread across the road surface. It freezes layer by layer from bottom to top, spreading across the entire road width and forming flowing ice that can reach tens or even hundreds of meters in length. After the flowing ice melts, it causes frost heave, frost heave, and water damage to the roadbed, and deformation and instability of the excavated slopes, leading to slope collapses.

[0003] Traditional measures for preventing ice runoff include infiltration trenches, culverts, ice-collecting trenches, ice-blocking walls, and ice-blocking fences. However, for existing highway subgrades, due to space constraints, it is often impossible to install passive protection structures such as ice-collecting trenches, ice-blocking walls, and ice-blocking fences of a certain size when ice runoff occurs. Active protection measures such as infiltration trenches and culverts require re-excavation of the already excavated and protected roadbed slopes, resulting in a large workload, high costs, and difficulty in ensuring construction quality. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a structure for preventing ice frost formation within single or small-area frame beams. Without compromising the existing frame beam protection, it fundamentally reduces the likelihood and scale of ice frost formation through proactive and comprehensive prevention measures including insulation, water collection, and drainage. The addition of vegetation bags, EPS insulation boards, alloy gabions, perforated PE pipes, and gravel drainage ditches to the slope provides insulation, water collection and drainage, and reduces the frost depth. Simultaneously, the alloy gabions provide some support to the slope, ensuring its stability.

[0005] The specific technical solution of this utility model is as follows:

[0006] A structure for preventing ice flow in single and small-area frame beams includes cast-in-place C30 reinforced concrete frame beams, seamless steel pipes, planting bags, EPS insulation boards, composite geomembranes, alloy gabions, steps, dry-laid rubble, perforated PE pipes, cast-in-place C20 concrete side ditches, plain soil backfill, and blind drains.

[0007] The seamless steel pipe is installed on the vertical slope above the top crossbeam of the cast-in-place C30 reinforced concrete frame beam where the ice flow occurs.

[0008] The perforated PE pipe is installed inside the slope, and the outlet of the perforated PE pipe is connected to the middle of the blind ditch;

[0009] The alloy gabions are stacked in the cast-in-place C30 reinforced concrete frame beams where ice flows, and composite geomembrane and EPS insulation board are laid sequentially on the surface of the alloy gabions.

[0010] The steps were excavated on a vertical slope within the frame where icicles were found;

[0011] The dry-laid rubble is used for backfilling the area of ​​the steps and the area beyond 60cm depth below the bottom of the rubble terrace.

[0012] The cast-in-place C20 concrete side ditch is located at the toe of the slope.

[0013] The blind drain is located at the bottom of the cast-in-place C20 concrete side ditch;

[0014] The planting bags are arranged in an array within the frame beam.

[0015] Furthermore, the cast-in-place C30 reinforced concrete frame beams are set on the road cut slope with a slope ratio of 1:0.75 to 1:1, the height of one frame is 2.17 to 2.5m, and the longitudinal spacing is 2.5m.

[0016] Furthermore, the seamless steel pipe is driven vertically into the slope along the longitudinal direction of the road cut, and M10 mortar is filled into the seamless steel pipe.

[0017] Furthermore, a trench is excavated at the location of the shard platform corresponding to the frame containing the saliva ice. The excavation length extends from the inner step area of ​​the frame to the lower seepage ditch of the cast-in-place C20 concrete side ditch, with an excavation slope of 12%. After the trench is excavated, a perforated PE pipe with a slope of 12% is installed at its bottom. The excavation area within 60cm from the top of the shard platform is backfilled with plain soil, and the remaining part of the shard platform excavation within the step area is constructed with dry-laid rubble masonry.

[0018] Furthermore, the perforated PE pipe has perforations distributed axially staggered in the upper semicircular region of the pipe wall, and the pipe wall is wrapped with permeable geotextile.

[0019] Furthermore, the alloy gabion is composed of reinforcing rods, reinforcing hoops, and alloy mesh, and is filled with dry-laid rubble.

[0020] Furthermore, a composite geomembrane is laid on the lower part of the EPS insulation board, the inner longitudinal side of the blind drain along the route, and the lower part.

[0021] Furthermore, the cast-in-place C20 concrete side ditch is a trapezoidal ditch, constructed using C20 concrete precast blocks.

[0022] Furthermore, the debris dump is positioned between the toe of the road cut slope and the outer edge of the cast-in-place C20 concrete ditch.

[0023] Furthermore, the blind drain is a rectangular trench composed of a composite geomembrane, bagged gravel, cast-in-place C20 concrete base, perforated PE pipe and crushed stone. The perforated PE pipe is arranged at the bottom center of the cast-in-place concrete base, and the remaining area of ​​the blind drain is constructed with bagged gravel. The composite geomembrane is laid on the inner side of the blind drain.

[0024] The beneficial effects of this utility model are as follows: 1. Compared with the traditional ice-spraying prevention structure, which is mainly used for ice-spraying treatment of newly built road cut slopes, this utility model patent provides a design method for ice-spraying prevention structure in single and small-area frame beams, which is mainly aimed at solving the problem of ice-spraying on existing road cut slopes.

[0025] 2. Without damaging the existing frame beam protection, this utility model fundamentally reduces the possibility and scale of drooling ice formation through proactive and comprehensive prevention and control measures such as heat preservation, water collection, and drainage.

[0026] 3. Vegetation bags, EPS insulation boards, alloy gabions, perforated PE pipes, and gravel blind drains were added to the slope to provide insulation, water collection and drainage, and reduce the frost depth of the slope. At the same time, the alloy gabions can provide some support to the slope and ensure its stability.

[0027] 4. This utility model has a simple design structure, is easy to construct, causes little damage to existing slopes, and is inexpensive. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure for preventing icing inside a single or small-area frame beam;

[0029] Figure 2 Schematic diagram of cross-section of anti-icing structure for single and small-area frame beams.

[0030] Figure 3 for Figure 2 A three-dimensional diagram of an alloy gabion;

[0031] Figure 4 for Figure 2 Cross-sectional view of the blind drain in the middle;

[0032] Figure 5 for Figure 2 A schematic diagram of a perforated PE pipe.

[0033] The following are shown in the diagram: 1. Cast-in-place C30 reinforced concrete frame beam; 2. Seamless steel pipe; 3. Vegetation bag; 4. Spiral ice; 5. Crushed platform; 6. Perforated PE pipe; 7. Cast-in-place C20 concrete side ditch; 8. Roadbed centerline; 9. EPS insulation board; 10. Composite geomembrane; 11. Alloy gabion; 12. Step; 13. Dry-laid rubble; 14. Plain soil backfill; 15. Blind drain; 16. Reinforcing rod; 17. Reinforcing hoop; 18. Alloy mesh; 19. Bagged gravel; 20. Cast-in-place C20 concrete base; 21. Crushed stone; 22. Pipe wall; 23. Drainage hole; 24. Permeable geotextile. Detailed Implementation

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0035] Example 1

[0036] like Figure 1 and Figure 2 As shown, this utility model provides a structure for preventing ice flow in a single or small-area frame beam, which consists of a cast-in-place C30 reinforced concrete frame beam 1, a seamless steel pipe 2, a planting bag 3, an EPS insulation board 9, a composite geomembrane 10, an alloy gabion 11, a step 12, dry-laid rubble 13, a perforated PE pipe 6, a cast-in-place C20 concrete side ditch 7, plain soil backfill 14, and a blind drain 15.

[0037] like Figure 1 and 2 As shown, the cast-in-place C30 reinforced concrete frame beam 1 serves as the foundation frame of the entire structure, set on the road cut slope with a slope ratio between 1:0.75 and 1:1. The height of a single frame ranges from 2.17 to 2.5 meters, and the longitudinal spacing is 2.5 meters. The frame beam divides the slope into multiple relatively independent areas, which helps to disperse stress, enhance the overall stability of the slope, and provide support for the installation of subsequent components.

[0038] like Figure 2 As shown, seamless steel pipe 2 is vertically arranged on the slope above the top crossbeam of the frame beam 1 where the ice flow occurs. Its specifications are: pipe length 2.5m, pipe diameter 60mm, wall thickness 5mm, and the steel pipe is filled with M10 mortar. The seamless steel pipe plays a crucial role in pre-support during the initial construction phase, effectively preventing slope collapse or deformation during subsequent construction, and creating safe and stable conditions for the implementation of other prevention and control measures.

[0039] like Figure 2 As shown, the perforated PE pipe 6 is carefully buried inside the slope, with its outlet precisely connected to the middle of the blind ditch 15. The perforated PE pipe has a diameter of 200mm, and its pipe wall 22 has 10mm diameter seepage holes 23 staggered along the axial direction on the upper semicircular part. Figure 5As shown, this design ensures efficient collection of water runoff from within the slope under varying water levels and flow conditions. The permeable geotextile 24 wrapped around the pipe wall possesses multiple important properties, with a weight ≥450g / m². 2 With a tensile strength ≥10.5KN / m, thickness ≥3.5mm, CBR puncture strength ≥4KN, and tear strength ≥0.6KN, it can prevent impurities such as mud and sand from entering the perforated PE pipe and causing blockage, while ensuring that water flows smoothly and unobstructed, achieving a good water collection and drainage effect. It is a key component of the entire drainage system.

[0040] like Figure 2 As shown, 11 stacks of alloy gabions are installed within the cast-in-place C30 reinforced concrete frame beam 1 where ice flow occurs. The alloy gabions consist of reinforcing bars 16, reinforcing hoops 17, and alloy mesh 18, as shown. Figure 3 As shown, the reinforcing bars and hoops are made of 8mm diameter HPB steel bars, while the alloy mesh is welded from 6mm diameter zinc-aluminum alloy wire. The alloy wire has a tensile strength greater than 400MPa, possessing high strength and good durability. The alloy gabion is filled with 13 dry-laid rubble stones, which are weather-resistant hard rock with a compressive strength ≥30MPa, a minimum thickness ≥15cm, one side length ≥30cm, and a volume ≥0.01m³. 3 Alloy gabions not only provide strong support for slopes, enhancing their stability and preventing collapse, but their dry-laid rubble filling also has certain drainage properties. Working together with drainage facilities such as perforated PE pipes, they further optimize drainage.

[0041] like Figure 2 As shown, EPS insulation board 9 is laid on the surface of alloy gabion 11 with a thickness of 10cm. The thermal conductivity of EPS insulation board 9 is no greater than 0.036W (m·K), which can effectively prevent the loss of heat from the slope and maintain a relatively stable slope temperature in the cold season, making it less likely to fall below the freezing point, thus significantly inhibiting the formation of ice floes; the water absorption rate is no greater than 3%, reducing the possibility of water entering the insulation board and affecting the insulation effect; the dimensional stability is no greater than 0.3%, ensuring the stability of the shape and performance of the insulation board under different environmental conditions; the water vapor transmission coefficient is no greater than 8.0ng (Pa·m·s), further blocking the intrusion of external water vapor; the compressive strength is no less than 100kPa and the tensile strength perpendicular to the panel direction is no less than 0.1MPa, ensuring the structural integrity of the insulation board when subjected to external pressure and tension, providing reliable thermal insulation protection for the slope.

[0042] like Figure 2 As shown, the composite geomembrane 10 is laid under the EPS insulation board 9, and along the inner and lower sides of the blind drain 15 along the longitudinal direction of the route. It adopts a one-layer fabric-one-membrane structure, with a unit area mass ≥700g / m². 2The membrane material is 0.5mm thick, with a CBR puncture strength of 2.2kN and a hydrostatic pressure resistance of 0.8MPa, strictly meeting the relevant requirements of GB / T17231-2008 "Geosynthetic Nonwoven Composite Geomembrane". The composite geomembrane plays a crucial role in waterproofing and isolation within the entire slope protection structure. It effectively prevents the infiltration of groundwater and surface water, avoiding moisture entering the slope's interior. Combined with EPS insulation boards, it forms a robust waterproof and thermal insulation system, protecting the slope structure from water erosion and freeze-thaw damage.

[0043] like Figure 2 As shown, step 12 is excavated vertically on the slope within the frame where ice flow occurs, with a width of 50cm and a depth of 1.0m (measured from the bottom of the frame beam). The step provides a safe and stable working space for construction personnel to carry out subsequent operations such as laying perforated PE pipes and assembling alloy gabions, facilitating the smooth progress of construction operations.

[0044] like Figure 2 As shown, dry-laid rubble masonry 13 is used for backfilling the area of ​​step 12 and the area beyond 60cm below the bottom of the rubble terrace 5. The dry-laid rubble masonry is made of weather-resistant hard rock, and its unique stacking method and physical properties make it play an important role in the structure. The evenly stacked dry-laid rubble masonry provides a certain degree of support, enhancing the stability of the slope. At the same time, the gaps between the stones have good drainage performance, allowing water to pass through smoothly, further optimizing the entire drainage system. Working together with other drainage components, it effectively lowers the groundwater level.

[0045] The cast-in-place C20 concrete side ditch 7 is located at the toe of the slope. It is trapezoidal in shape, with an upper base width of 1.2m, a lower base width of 0.4m, and a height of 0.4m. It is carefully constructed using precast C20 concrete blocks. As the main collection and drainage channel for water flowing from the slope surface, the side ditch guides water from various parts of the slope to a suitable drainage system, preventing water accumulation near the toe and thus reducing the risk of ice runoff formation in the toe area. This is crucial for ensuring the overall stability of the slope.

[0046] like Figure 2 As shown, blind drain 15 is located below the cast-in-place C20 concrete side ditch 7. It is a rectangular trench with a height between 1.0 and 1.5 m and a width between 1.2 and 1.5 m. The blind drain is composed of a composite geomembrane 10, bagged gravel 19, a cast-in-place C20 concrete base 20, a 200 mm diameter perforated PE pipe 6, and crushed stone 21. Figure 4As shown, a 200mm diameter perforated PE pipe 6 is precisely positioned at the center of the bottom of the cast-in-place concrete base 20. Crushed stone is used for backfilling within a 75cm height and 90cm width area of ​​the perforated PE pipe. This backfilling method ensures the stability of the perforated PE pipe and utilizes the good permeability of the crushed stone to further promote drainage. The remaining area of ​​the blind drain is constructed using bagged gravel 19. The bagged gravel has a certain degree of permeability and stability, ensuring drainage while preventing the drain wall from collapsing. A composite geomembrane 10 is tightly installed inside the blind drain 15, effectively preventing external moisture from seeping into the blind drain, ensuring the normal operation of the internal drainage system of the blind drain, further lowering the groundwater level, and reducing the possibility of ice formation.

[0047] Vegetation bags 3 are neatly stacked in an array within the frame beam 1. The vegetation bags are typically filled with soil and fertilizer suitable for plant growth. After the construction of the slope protection structure is completed, grass, shrub, and seed are planted in the vegetation bags. As the grass, shrub, and seed grow and develop, vegetation gradually covers the slope, forming a green protective layer. The root system of the vegetation can penetrate deep into the soil, enhancing the cohesion of the slope soil, effectively preventing soil erosion, and improving the slope's resistance to erosion. Simultaneously, the transpiration of the vegetation can regulate slope humidity, reduce surface water runoff, and, in conjunction with other prevention and control measures, jointly enhance the overall protective performance of the slope, achieving an organic combination of ecological protection and engineering prevention and control.

[0048] Working principle of each component

[0049] The drainage system works in tandem: the perforated PE pipe 6 serves as the primary water collection component, collecting runoff from the slope through seepage holes 23 on its pipe wall, and then guiding the water to the blind ditch 15. The backfill structure of gravel 21 and bagged sand 19 within the blind ditch provides excellent infiltration and flow channels for water, ensuring rapid drainage. The cast-in-place C20 concrete side ditch 7 collects runoff from the slope surface, integrating it into the entire drainage system, ultimately draining the water from the slope area, effectively lowering the groundwater level and reducing the water source conditions for ice formation at the source.

[0050] Synergistic effect of thermal insulation and waterproofing: EPS insulation board 9, with its low thermal conductivity and other properties, prevents heat loss from the slope, maintains a relatively stable slope temperature, and inhibits the formation of ice runoff. The composite geomembrane 10 forms a waterproof barrier under the insulation board and inside the drainage ditch, preventing external moisture from entering the slope, and together with the insulation board, constructs a waterproof and thermal insulation system. In cold seasons, this synergistic effect effectively reduces slope temperature fluctuations and lowers the likelihood of ice runoff formation; in warm seasons, it prevents rainwater and other moisture from seeping into the slope, keeping the slope dry and stable.

[0051] Synergistic Support and Protection: Seamless steel pipes 2 provide pre-support for the slope during the initial construction phase, while alloy gabions 11 provide support for the slope during later construction, both enhancing the slope's stability. Dry-laid rubble masonry 13 provides support and assists in drainage when backfilling the steps 12 and parts of the rubble terraces 5. After vegetation grows in the vegetation bags 3, its root system reinforces the slope soil, working together with other support structures to prevent slope collapse. Simultaneously, vegetation cover reduces surface water runoff and soil erosion, further protecting the slope structure.

[0052] The specific construction steps are as follows:

[0053] First, carefully remove the plant bag 3 from the frame where icy condensation has occurred and place it properly for future use.

[0054] Above the top beam of the frame where the ice flows, seamless steel pipe piles (i.e. seamless steel pipe 2) are manually driven in using piling equipment. The steel pipe piles have a diameter of 60mm, a wall thickness of 5mm, and a length of 2.5m. They are laid out along the longitudinal slope of the road cut at a spacing of 50cm to provide pre-support and prevent excessive disturbance to the slope during subsequent construction.

[0055] M10 mortar is injected into the driven steel pipe piles to improve their shear strength, ensure the stability of the steel pipe piles in the slope, and provide a safety guarantee for subsequent construction.

[0056] The soil on the vertical slope of the frame containing the ice floes was manually excavated to a depth of 1.0m from the bottom of the frame beam, and a 50cm wide step was excavated. During the excavation process, care was taken to control the excavation dimensions and slope to ensure the flatness and stability of the step, creating favorable conditions for subsequent construction.

[0057] At the location of the break-off platform 5 corresponding to the icy grid, excavate a trench 80cm wide and at least 1m deep according to design requirements. The excavation length extends from the inner step 12 of the grid to the lower blind drain 15 of the cast-in-place C20 concrete side ditch 7, with a slope of 12%. During excavation, the width, depth, and slope of the trench must be strictly controlled to ensure that the trench meets design standards and provides a suitable foundation for the subsequent laying of the perforated PE pipe 6.

[0058] A 200mm diameter perforated PE pipe 6 with a slope of 12% is laid at the bottom of the trench excavated on the rubble bed. The perforated PE pipe is placed at the bottom of the trench according to the designed slope, ensuring its accurate positioning. Then, a layer of permeable geotextile 24 is wrapped around the PE pipe. When wrapping, it is important to ensure that the geotextile fits tightly against the pipe wall to prevent mud, sand, and other debris from entering the pipe and affecting the drainage effect.

[0059] Use 13 dry-laid rubble masonry to backfill the excavated steps and the area beyond 60cm below the rubble terraces on the slope. During backfilling, the dry-laid rubble masonry should be stacked evenly to ensure stability and drainage. The rubble masonry should interlock to form a stable structure. At the same time, care should be taken to control the backfill height and slope to harmonize with the surrounding terrain.

[0060] The area within 60cm below the rubble bed should be backfilled with plain soil. The plain soil backfill should be carried out in layers, and the thickness of each layer should not be too large. During the backfilling process, it should be compacted to ensure that the density of the plain soil backfill meets the design requirements and to prevent settlement and other problems.

[0061] Within a 90cm depth area vertically excavated on the slope, construct alloy gabions 11 and fill them with dry-laid rubble 13. When constructing the alloy gabions, ensure accurate and stable positioning. Reinforcing bars 16 and reinforcing hoops 17 should be installed according to design requirements, and the alloy mesh 18 should be securely welded. When filling with dry-laid rubble, ensure the filling is dense to allow the alloy gabions to fully exert their supporting function.

[0062] A layer of composite geomembrane 10 is laid on the surface of the alloy gabion 11. During laying, it is important to ensure that the geomembrane is flat and wrinkle-free, and that the connections between the membranes are firm to prevent leakage. The geomembrane should cover the surface of the alloy gabion to provide waterproofing and isolation.

[0063] A 10cm thick EPS insulation board 9 is laid on top of the composite geomembrane 10 on the surface of the alloy gabion. During laying, ensure the insulation board is tightly fitted to the geomembrane, and that the joints between the insulation boards are tight to prevent heat loss. The insulation board should cover the entire surface of the alloy gabion to effectively perform its thermal insulation function.

[0064] Finally, the previously removed vegetation bags 3 are re-stacked within the frame beam 1, and grass and shrub seeds are planted in the vegetation bags. When planting grass and shrub seeds, suitable varieties should be selected according to local climate and soil conditions to ensure that the vegetation can grow well and restore the greening and protective functions of the slope.

[0065] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A structure for preventing icing in single and small-area frame beams, characterized in that, Including cast-in-place C30 reinforced concrete frame beams (1), seamless steel pipes (2), planting bags (3), EPS insulation boards (9), composite geomembranes (10), alloy gabions (11), steps (12), dry-laid rubble (13), perforated PE pipes (6), cast-in-place C20 concrete side ditches (7), plain soil backfill (14), and blind drains (15); The seamless steel pipe (2) is set on the vertical slope above the top crossbeam of the cast-in-place C30 reinforced concrete frame beam (1) where the ice flow occurs; The perforated PE pipe (6) is installed inside the slope, and the outlet of the perforated PE pipe (6) is connected to the middle of the blind ditch (15); The alloy gabion (11) is stacked in the cast-in-place C30 reinforced concrete frame beam (1) where the ice flow occurs, and the surface of the alloy gabion (11) is sequentially covered with composite geomembrane (10) and EPS insulation board (9); The steps (12) are excavated on a vertical slope within the frame where icicles appear; The dry-laid rubble (13) is used to backfill the area of ​​the steps (12) and the area beyond 60cm below the bottom of the rubble terrace (5); The cast-in-place C20 concrete side ditch (7) is set at the toe of the slope; The blind drain (15) is located at the bottom of the cast-in-place C20 concrete side ditch (7); The planting bags (3) are arrayed and stacked inside the cast-in-place C30 reinforced concrete frame beam (1).

2. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, The cast-in-place C30 reinforced concrete frame beam (1) is set on the road cut slope with a slope ratio of 1:0.75 to 1:1, the height of one frame is 2.17 to 2.5m, and the longitudinal spacing is 2.5m.

3. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, The seamless steel pipe (2) is driven vertically into the slope along the longitudinal direction of the road cut, and M10 mortar is filled into the seamless steel pipe.

4. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, Excavate a trench at the location of the shard platform (5) corresponding to the frame where the ice shard (4) is located. The excavation length is from the range of the inner steps (12) of the frame to the location of the blind ditch (15) under the cast-in-place C20 concrete side ditch (7). The excavation slope is 12%. After the trench is excavated, a perforated PE pipe (6) with a slope of 12% is installed at its bottom. The excavation range is backfilled with plain soil (14) within 60cm from the top of the shard platform. The remaining part of the excavation range of the steps (12) and the shard platform (5) is laid with dry-laid rubble (13).

5. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, The perforated PE pipe (6) has perforated holes (23) distributed axially staggered in the upper semicircular range of the pipe wall (22), and the pipe wall (22) is wrapped with a permeable geotextile (24).

6. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, The alloy gabion (11) is composed of reinforcing rods (16), reinforcing hoops (17), and alloy mesh (18), and is filled with dry-laid rubble (13).

7. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, Composite geomembrane (10) is laid on the lower part of the EPS insulation board (9), the inner side of the blind drain (15) along the longitudinal direction and the lower part.

8. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, The cast-in-place C20 concrete side ditch (7) is a trapezoidal ditch, constructed using C20 concrete precast blocks.

9. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, The breakwater (5) is located between the toe of the road cut slope and the outer edge of the cast-in-place C20 concrete side ditch (7).

10. The anti-icing structure for single and small-area frame beams according to claim 1, characterized in that, The blind drain (15) is a rectangular trench, consisting of a composite geomembrane (10), bagged gravel (19), cast-in-place C20 concrete base (20), perforated PE pipe (6) and crushed stone (21). The perforated PE pipe (6) is arranged at the bottom center of the cast-in-place C20 concrete base (20). The remaining area of ​​the blind drain (15) is constructed with bagged gravel (19), and the composite geomembrane (10) is laid inside the blind drain (15).

Images