Light structure for raising roadbed of road in reservoir inundation area and construction method thereof

Abstract

This invention discloses a lightweight structure for raising roadbeds in reservoir-inundated areas and its construction method, belonging to the technical field of roadbed protection structure construction. Three retaining walls are located on both sides and in the middle of the original roadbed, forming two regions. Reinforcing anchor bolt groups are inserted on both sides of the original roadbed. Each region includes: a new roadbed, a pavement structure layer, and several anti-buoyancy anchor bolt groups. The new roadbed is constructed using foamed lightweight concrete and poured onto the upper surface of the original roadbed. Several anti-buoyancy anchor bolt groups are placed between the new and original roadbeds. The pavement structure layer is laid on the upper surface of the new roadbed. Connecting reinforcing bar groups are placed on the new roadbed in both regions and on the retaining wall located in the middle of the original roadbed. A water level sensor is placed on the retaining wall near the reservoir. A ballast water tank is placed between the ground line and the retaining wall. This invention ensures road accessibility during construction and avoids dynamic water pressure caused by changes in water level in the raised structure of the submerged section, thus ensuring the stability of the new roadbed.

Description

Technical Field

[0001] This invention belongs to the field of roadbed protection structure construction technology, specifically relating to a lightweight structure for raising roadbed in reservoir inundation areas and its construction method. Background Technology

[0002] In the construction of water conservancy and hydropower projects, after a hydropower station impounds water and forms a reservoir, the rising water level often submerges parts of the roads passing through the reservoir area (hereinafter referred to as submerged road sections). To restore traffic, these roads need to be reconstructed to restore their original traffic function. The main reconstruction methods currently adopted in these projects are as follows:

[0003] Detour: Take into account topography, geology, project planning and other conditions to bypass the flooded section and pass through other unflooded areas;

[0004] Bridge construction: This method is often used when the water level has submerged a significant portion of the original roadbed;

[0005] In-situ reconstruction: This method is suitable for situations where terrain and geological conditions limit access, making detours or bridges impossible, and where the water level only slightly submerges the roadbed. When using in-situ reconstruction, the conventional approach is to directly construct retaining walls without preserving the original road. This involves demolishing the submerged section of the original roadbed, excavating the foundation, and building the retaining wall structure. However, this method faces the following challenges: some important roads cannot be closed, or the closure period is limited, necessitating maintaining uninterrupted traffic. Removing the roadbed disrupts traffic flow. Furthermore, due to the waterlogging, retaining walls typically have a large cross-section, requiring the excavation of the original roadbed for the foundation. This not only consumes significant manpower and resources but also increases construction costs and reduces efficiency.

[0006] Patent CN203546548U discloses a revetment structure for roadbed elevation and reconstruction. A concrete structure of a certain thickness is installed on the outside of the original roadbed retaining wall, with the concrete tightly adhering to the original retaining wall, thus ensuring the stability of the original roadbed after the power station is completed and impounded. Since the original roadbed has already undergone long-term vehicle compaction, its stability and bearing capacity are relatively high. The widened roadbed (i.e., after the concrete structure is installed) can serve as a foundation upon which a gravity retaining structure with good stability can be built. This allows construction without damaging the original roadbed, ensuring normal traffic flow on the original road and saving on project costs. However, flooded road sections often have high traffic volume and are usually the only access route in the area. Therefore, it is essential to ensure normal traffic flow during construction, which is why maintaining traffic flow in these sections faces significant challenges. Furthermore, low-grade highways account for a large proportion of flooded road sections, and their width is generally narrow. In addition, to ensure the stability of gravity retaining walls, foundations need to be built when constructing them on the original roadbed. This foundation construction inevitably occupies the existing road surface for formwork and pouring, and the backfilling of the raised roadbed and road construction also require the use of the existing road surface, causing traffic disruptions. This phenomenon is even more pronounced on narrow roads. Furthermore, due to the large cross-section of gravity retaining structures and the high bearing capacity requirements of the foundations, construction difficulty and costs increase, leading to longer construction periods and longer periods of traffic flow maintenance.

[0007] Patent CN116411494A discloses a method for rapidly widening a roadbed longitudinal section elevation section. This method divides the road into a construction zone, a median strip, and a traffic maintenance zone, and uses foamed lightweight concrete to form a new roadbed. The construction zone and the traffic maintenance zone are separated by foamed lightweight soil retaining walls, thus reducing space occupation and ensuring road traffic flow. However, submerged road sections are affected by water levels, and the lightweight foamed soil, being relatively light, is prone to overturning when water levels change. Furthermore, water levels in submerged road sections are significantly affected by the seasons, with a substantial difference between low and flood levels. When the new roadbed formed using the foamed lightweight soil described in the second patent experiences water level changes, the water level on the side closer to the reservoir rises rapidly, while the water level on the other side, due to slower infiltration, creates a water level difference between the two areas, generating dynamic water pressure that fails to meet roadbed stability requirements. Simultaneously, during flood intrusion, the new roadbed is prone to floating, causing it to detach from the original roadbed and making it susceptible to collapse.

[0008] Therefore, there is currently a lack of a lightweight structure suitable for raising the roadbed in flooded road sections. This structure should be able to adapt to changes in water level, while having low construction requirements and wide geological adaptability, and also taking into account the needs of traffic flow. Summary of the Invention

[0009] In view of this, the present invention provides a lightweight structure for raising the roadbed in a reservoir-inundated area and its construction method. During construction, it can ensure the road remains passable and avoid the dynamic water pressure caused by changes in the water level in the raised structure of the submerged road section, thereby ensuring the stability of the new roadbed.

[0010] This invention is achieved through the following technical solution:

[0011] A lightweight structure for raising the roadbed in a reservoir-inundated area is installed on the original roadbed and includes: three retaining walls, several sets of reinforcing anchor bolts, several sets of connecting reinforcing bars, a water level sensor, and a ballast water tank.

[0012] The three retaining walls are located on both sides and in the middle of the original roadbed, forming two areas: the construction zone and the traffic maintenance zone.

[0013] The reinforcement anchor bolt groups are inserted on both sides of the original roadbed width direction;

[0014] Each area includes: a new roadbed, a pavement structure layer, and several anti-buoyancy anchor bolt groups;

[0015] The new roadbed is made of foamed lightweight concrete and is cast onto the upper surface of the original roadbed.

[0016] Several of the aforementioned anti-buoyancy anchor bolt groups are installed between the new roadbed and the original roadbed;

[0017] The pavement structure layer is laid on the upper surface of the new roadbed;

[0018] The connecting reinforcement assemblies are installed on the new roadbed in two areas and on the retaining wall located in the middle of the original roadbed;

[0019] The water level sensor is installed on the retaining wall near the reservoir side;

[0020] The ballast water tank is located between the ground line and the retaining wall. The ballast water tank adjusts according to the signal sent by the water level sensor to balance the dynamic water pressure between the two areas.

[0021] Furthermore, the reinforced anchor bolt groups are evenly spaced along the height direction of the retaining wall;

[0022] Each of the aforementioned reinforced anchor bolt groups comprises several reinforced anchor bolts;

[0023] One end of each of the reinforced anchor rods is anchored to the retaining wall, and the other end is anchored to the original roadbed, and they are all arranged obliquely downward towards the original roadbed.

[0024] Furthermore, the upper surface of the original roadbed is machined with a roughened surface;

[0025] A side groove is provided on one side of the roughened surface.

[0026] Furthermore, each region also includes: two or more carbon fiber meshes;

[0027] Two or more of the aforementioned carbon fiber meshes are stacked and fixed on the upper part of the anti-buoyancy anchor group, and located inside the corresponding new roadbed.

[0028] Furthermore, when the original roadbed has a side slope, the retaining walls on both sides of the original roadbed are set on the side slope.

[0029] Anti-slip steps are provided on the slope between the retaining wall and the original roadbed.

[0030] Furthermore, the ballast water tank includes: a tank body, a volume control module, a control module, an inlet passage, and an outlet passage;

[0031] The container is connected to the reservoir through an inlet and an outlet water passage.

[0032] The volume-regulating module includes: a motor, a screw, a pusher housing, and a volume-regulating plate;

[0033] The motor is located on the top of the housing, and its output end is coaxially fixed to the screw. The volume-stabilizing plate is located inside the housing and slides against the inner wall of the housing. The push shell is rotatably connected to the top of the volume-stabilizing plate, and the push shell is threaded to engage with the screw. When the motor drives the screw to rotate, the push shell rotates and rises relative to the screw, and the volume-stabilizing plate moves up and down relative to the housing as the push shell rises and falls.

[0034] The control module is mounted on the housing and is electrically connected to the water level sensor. The control module controls the opening and closing of the inlet and outlet water passages based on the electrical signals emitted by the water level sensor.

[0035] Furthermore, each of the aforementioned retaining walls includes: a panel foundation, a tie rod steel mesh, and two panels;

[0036] The panel base is integrally formed from a horizontal part and a vertical part, with the vertical part being vertically set on the upper end surface of the horizontal part;

[0037] The tie rod steel mesh is set in the vertical part of the panel foundation, and its plane is parallel to the plane of the horizontal part of the panel foundation; a plurality of the tie rod steel meshes are evenly spaced along the height direction of the panel foundation.

[0038] The two panels are respectively installed on both sides of the width direction of the vertical part of the panel base.

[0039] Furthermore, the panel facing the ventilation area of ​​the retaining wall is made of eco-friendly lightweight soil panel, which is a mixture of vegetation concrete and porous foaming agent.

[0040] The exposed side of the protective wall has several openings; each opening contains a culture tube for introducing microorganisms.

[0041] Furthermore, the roadbed raised lightweight structure also includes: an anti-seepage component;

[0042] The seepage prevention components include: wire mesh, geotextile, several ecological bricks, and several drainage pipes;

[0043] Several of the aforementioned eco-bricks are installed on the wall surface facing the raised section of the retaining wall; each eco-brick has a snap-fit ​​groove on one side and a snap-fit ​​component on the opposite side; every two adjacent eco-bricks are connected by the snap-fit ​​groove and the snap-fit ​​component.

[0044] The drainage pipe is inserted into the ecological bricks, connecting the elevated roadbed lightweight structure with the outside;

[0045] The wire mesh is laid on the eco-bricks, and the geotextile is placed on the wire mesh.

[0046] A construction method for a lightweight structure for raising the roadbed in a reservoir-inundated area, based on the aforementioned lightweight structure for raising the roadbed in a reservoir-inundated area, includes the following steps:

[0047] S1: Divide the original roadbed into a traffic maintenance zone and a construction zone;

[0048] S2: Carry out construction in the construction area, the construction method of which includes the following steps:

[0049] S201: Casting to form a retaining wall on one side of the original roadbed;

[0050] S202: Insert reinforcement anchor bolt groups sequentially into the retaining wall and the original roadbed;

[0051] S203: Roughen the original roadbed and install anti-buoyancy anchor bolt groups;

[0052] S204: Pouring to form a retaining wall located at the boundary between the construction area and the traffic control area;

[0053] S205: Layered pouring of foamed lightweight concrete to form a new roadbed;

[0054] S206: Lay the road surface structural layer and carry out maintenance;

[0055] S3: Carry out construction in the traffic maintenance zone. The construction method for the traffic maintenance zone includes the following steps:

[0056] S301: Construct the retaining wall of the maintenance zone in accordance with S201;

[0057] S302: Construct reinforced anchor bolt assemblies in accordance with S202;

[0058] S303: Anti-buoyancy treatment shall be carried out in accordance with S203;

[0059] S304: The new roadbed is formed by layered pouring of foamed lightweight concrete, and connecting reinforcement bars are inserted sequentially with each layer of pouring;

[0060] S4: A water level sensor is installed on the retaining wall near the reservoir side, and a ballast water tank is installed on the side of the retaining wall away from the reservoir side from the ground line.

[0061] Beneficial effects:

[0062] (1) The present invention provides a lightweight roadbed elevation structure for highways in reservoir inundation areas. This structure is installed on the original roadbed, raising it above the original level. This not only improves the utilization rate of the original roadbed but also significantly reduces the preliminary work required for new highway construction (including geological surveys and route selection). Furthermore, since the elevated roadbed structure is located within the land acquisition area of ​​the original roadbed, no new land is required during construction, effectively solving implementation problems caused by land acquisition. The new roadbed uses foamed lightweight concrete, which has the advantage of reducing structural weight, does not generate earth pressure, eliminates the need for gravity retaining structures and foundations, and has low requirements for foundation bearing capacity. Therefore, it can be used in adverse geological conditions such as poor foundation bearing capacity (e.g., accumulation bodies, soft foundations), making it more widely applicable. Due to the simple materials used, The construction is quick, enabling rapid roadbed elevation and saving time and investment. Three retaining walls divide the submerged section into a construction zone and a traffic maintenance zone, allowing the construction process to simultaneously maintain traffic flow and ensure uninterrupted traffic. Furthermore, several anti-buoyancy anchor bolt groups ensure a stable connection between the original and new roadbeds, improving the new roadbed's anti-buoyancy. Several reinforcement anchor bolt groups ensure a stable connection between the protective structure and the original roadbed, while several connecting reinforcement bar groups ensure that the new roadbeds in both zones form a unified whole. This prevents water level changes caused by heavy rain from causing the new roadbed to float away from the original roadbed, creating dynamic water pressure between the two zones and leading to road collapse, thus ensuring roadbed stability. Ballast water tanks balance the dynamic water pressure between the two zones, further improving the stability of the elevated lightweight structure.

[0063] (2) A lightweight structure for raising the roadbed in a reservoir flooding area is provided by the present invention. Several reinforced anchor bolt groups are evenly spaced along the height direction of the corresponding retaining wall. The reinforced anchor bolts are arranged obliquely downward toward the original roadbed, which can ensure the stable use of the original roadbed while improving the connection stability between the retaining wall and the original roadbed.

[0064] (3) A lightweight structure for raising roadbed in reservoir flooding area of ​​the present invention has a roughened surface on the upper end of the original roadbed, which can form a sufficiently rough surface on the original roadbed, thereby enhancing the bonding force between the original roadbed and the new roadbed and further improving the buoyancy resistance of the new roadbed.

[0065] (4) A lightweight structure for raising roadbed in reservoir flooding area of ​​the present invention comprises two or more carbon fiber meshes stacked and fixed on the upper part of the anti-buoyancy anchor group. The carbon fiber meshes, relying on their high tensile strength and flexible structure, can withstand the tensile force and deformation caused by uneven settlement of the foundation. The combination of carbon fiber meshes and anti-buoyancy anchors can greatly improve the anti-buoyancy capacity of the new roadbed.

[0066] (5) The present invention provides a lightweight structure for raising the roadbed of a highway in a reservoir flooding area. When the original roadbed has a side slope, the retaining walls on both sides of the original roadbed are set on the side slope, which can ensure the stability of the roadbed. In particular, when the side slope is located on the reservoir side, it can effectively prevent the original roadbed and the new roadbed from being impacted by the river water, thereby ensuring the stability of the roadbed. Anti-slip steps are provided on the side slope between the retaining wall and the original roadbed, so that the foamed lightweight concrete and the side slope are closely attached, which can effectively prevent the foamed lightweight concrete from sliding down the slope surface when the new roadbed is poured, thereby improving the integrity of the foamed lightweight concrete and the side slope.

[0067] (6) A lightweight structure for raising the roadbed in a reservoir flooding area according to the present invention, when the motor drives the screw to rotate, the push shell rotates and rises and falls relative to the screw. The constant volume plate moves up and down relative to the box body as the push shell rises and falls, which can adjust the water capacity of the ballast water tank and is beneficial to adjust the dynamic water pressure of the two areas. The water level sensor can monitor the water level in the reservoir in real time. The control module controls the opening and closing of the water inlet and outlet passages through the electrical signal emitted by the water level sensor. When the water level on the left side of the roadbed is high, the water tank on the right side opens, thereby balancing the water level difference between the two areas and preventing the new roadbed on the reservoir side from floating and deviating from the original roadbed due to a sudden rise in water level, which would cause the road surface to collapse.

[0068] (7) A lightweight structure for raising the roadbed in a reservoir flooding area according to the present invention has a tie rod steel mesh set in the vertical part of the panel foundation, which can enhance the stability of the concrete structure; two panels are respectively set on both sides of the vertical part of the panel foundation, thereby improving the compressive strength of the panel foundation.

[0069] (8) The present invention provides a lightweight structure for raising the roadbed of a highway in a reservoir flooding area. The panel facing the traffic control area of ​​the retaining wall is made of ecological lightweight soil panel made of vegetation concrete and porous foaming agent. The vegetation concrete contains vegetation seeds and nutrients, and the vegetation can grow spontaneously. This can avoid the oppressive feeling caused by the tall concrete retaining wall blocking people. The porous foaming agent has high porosity and can absorb noise and be used as a sound insulation wall. Microorganisms can repair the green soil and repair the vegetation, improve the survival rate of vegetation, and improve the erosion resistance of the retaining wall, so that the ecological lightweight soil panel can serve as a support and greening structure for the subsequent new roadbed.

[0070] (9) A lightweight structure for raising the roadbed in a reservoir flooding area is provided by the present invention. Ecological bricks are set on the wall surface facing the raised part of the retaining wall, wire mesh is laid on the ecological bricks, and geotextile is placed on the wire mesh to prevent soil loss and improve the reinforcement effect. The snap-fit ​​grooves and snap-fit ​​parts set on the ecological bricks cooperate with each other to achieve locking and fixing, so that the connection between several ecological bricks is stable and forms a whole, improving the strength of the retaining wall. The drainage pipe can drain the water in the roadbed raised lightweight structure to the outside.

[0071] (10) The present invention provides a construction method for a lightweight structure for raising the roadbed in a reservoir-inundated area. During construction, the road can be kept open, while the stability and bearing capacity of the new roadbed can be effectively improved, and the construction risk can be reduced. This provides an efficient and reliable construction scheme for raising the roadbed in a reservoir-inundated area to ensure the stability of the new roadbed. Attached Figure Description

[0072] Figure 1 This is a schematic cross-sectional view of the roadbed elevation lightweight structure of the present invention;

[0073] Figure 2 This is a schematic diagram of the protective wall structure of the present invention;

[0074] Figure 3 This is a cross-sectional view of the ballast water tank of the present invention;

[0075] Among them, 1-water level, 2-wall protection, 3-new roadbed, 4-reinforced anchor, 5-anti-buoyancy anchor, 6-guardrail, 7-pavement structure layer, 8-design elevation, 9-connecting reinforcing bar, 10-original roadbed, 11-side ditch, 12-ground line, 13-roughened surface, 14-carbon fiber mesh, 15-water level sensor, 16-ballast water tank assembly, 17-panel foundation, 18-tie rod steel mesh, 19-panel, 21-motor, 22-screw, 23-propulsion shell, 24-volume stabilizing plate. Detailed Implementation

[0076] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0077] Example 1:

[0078] This embodiment provides a lightweight structure for raising the roadbed in reservoir inundation areas, such as... Figure 1 As shown, the raised lightweight structure is set on the original roadbed 10 and includes: three retaining walls 2 arranged along the length of the original roadbed 10, several sets of reinforcing anchor bolts, several sets of connecting reinforcing bars and water level adjustment device.

[0079] Three retaining walls 2 are respectively fixed vertically on the original roadbed 10 and are parallel to each other, forming two areas. Two of the retaining walls 2 are located on both sides of the original roadbed 10 in the width direction, and these retaining walls 2 are called the second retaining walls. The remaining retaining wall 2 is set between the two second retaining walls, and this retaining wall 2 is called the first retaining wall.

[0080] like Figure 2 As shown, each retaining wall 2 (i.e., the first retaining wall and the second retaining wall) includes: a panel foundation 17, a tie rod reinforcement mesh 18, and two panels 19; the panel foundation 17 includes: a horizontal part and a vertical part, the vertical part being vertically arranged on the upper end face of the horizontal part; as an example, the panel foundation 17 is cast using C25 concrete; the tie rod reinforcement mesh 18 is used to enhance the stability of the concrete structure and is arranged in the vertical part of the panel foundation 17, its plane being parallel to the plane of the horizontal part of the panel foundation 17; in this embodiment, the tie rod reinforcement mesh 18 is straight A mesh structure is formed by 10mm diameter steel bars, and the center-to-center distance of the mesh units of the tie rod steel bar mesh 18 is 10cm. Several tie rod steel bar meshes 18 are evenly spaced along the vertical height direction of the panel foundation 17. In this embodiment, the distance between every two adjacent tie rod steel bar meshes 18 is two meters, which makes the retaining wall 2 have better crack resistance and self-stabilizing ability. Two panels 19 are respectively installed on both sides of the vertical width direction of the panel foundation 17, thereby improving the compressive strength of the panel foundation 17. The retaining wall 2 can ensure the long-term stable use of the original roadbed 10.

[0081] Several reinforcing anchor bolt groups are installed on both sides of the original roadbed 10 in the width direction to reinforce the original roadbed 10 and prevent it from settling and cracking to varying degrees after long-term use, thereby ensuring the stable use of the original roadbed 10 when the new roadbed 3 is poured; the reinforcing anchor bolt groups can be connected to the second retaining wall or not connected to the second retaining wall; for example Figure 1 As shown, in this embodiment, the reinforcing anchor bolt group is simultaneously inserted into the second retaining wall and the original roadbed 10 (referring to the lower slope of the original roadbed 10), which not only stabilizes the original roadbed 10 but also connects the two; several reinforcing anchor bolt groups are inserted along the height direction of the second retaining wall (i.e., Figure 1 The reinforcing anchors are evenly spaced in the vertical direction. Each group of reinforcing anchors consists of several reinforcing anchors 4 evenly spaced along the length of the second retaining wall. One end of each reinforcing anchor 4 is anchored to the second retaining wall, and the other end is anchored to the original roadbed 10. All anchors are arranged obliquely downwards towards the original roadbed 10, meaning the end of the reinforcing anchor 4 inside the second retaining wall is higher than the end inside the original roadbed 10. The angle between each reinforcing anchor 4 and the horizontal plane is 20°. The size of each reinforcing anchor 4 is determined according to the actual situation. As an example, each reinforcing anchor 4 is preferably a steel bar with a diameter of 25mm and a length of 6-9m. As an example, the reinforcing anchor groups are preferably two groups; the spacing between any two adjacent reinforcing anchors 4 (including those within and between groups) is preferably 2m.

[0082] The space between the two second retaining walls is divided into two areas by the first retaining wall, one area serving as the construction area and the other as the traffic maintenance area, thereby ensuring road traffic flow.

[0083] like Figure 1 As shown, each area includes: new roadbed 3, guardrail 6, pavement structure layer 7, and several anti-buoyancy anchor bolt groups;

[0084] The new roadbed 3 is set on the upper surface of the original roadbed 10, located between the first retaining wall and a second retaining wall. The new roadbed 3 is made of foamed lightweight concrete. Because the foamed lightweight concrete is lightweight, it will not generate additional soil pressure on the retaining walls 2 on both sides during the pouring process. The new roadbed 3 is fixed to the original roadbed 10 by a number of anti-buoyancy anchor bolt groups. The foamed lightweight concrete is composed of cement-based materials, foaming agents and other additives. In addition to reducing weight, it also has the advantages of heat insulation and sound insulation, so it can be used as a roadbed for foundations with poor bearing capacity and adverse geological conditions.

[0085] The anti-buoyancy anchor bolt group serves two purposes: firstly, it ensures the stability of the new roadbed 3 after water impoundment; secondly, it strengthens the connection between the new roadbed 3 and the original roadbed 10, thereby improving the anti-buoyancy of the new roadbed 3. Several anti-buoyancy anchor bolt groups are evenly spaced along the length of the original roadbed 10. Each anti-buoyancy anchor bolt group contains several anti-buoyancy anchor bolts 5. One end of each anti-buoyancy anchor bolt 5 is anchored within the original roadbed 10, and the other end is anchored within the new roadbed 3. The anti-buoyancy anchor bolts 5 in each anti-buoyancy anchor bolt group are evenly spaced along the width of the original roadbed 10. As an example, the anti-buoyancy anchor bolt 5 is preferably a steel bar with a diameter of 25mm and a length of 4.5–6m. The spacing between any two adjacent anti-buoyancy anchor bolts 5 is preferably 1.0m. The upper part of each anti-buoyancy anchor bolt 5 extends 2m above the road surface of the original roadbed 10.

[0086] The pavement structure layer 7 is laid on the upper surface of the new roadbed 3, and the upper surface of the pavement structure layer 7 serves as the design elevation 8.

[0087] Guardrail 6 is installed on the side of the corresponding new roadbed 3 near the second retaining wall; guardrail 6 can effectively protect the safety of vehicle driving and reduce the risk of vehicles running off the lane; as an example, guardrail 6 is made of C25 concrete; as an example, the retaining wall 2 is provided with several mounting holes for installing guardrail 6, and guardrail 6 is fixed to the second retaining wall and the original roadbed 10 by steel bars; guardrail 6 is a corrugated guardrail; as an example, the vertical height of the upper end of guardrail 6 is 20cm higher than the upper end of the new roadbed 3.

[0088] The upper surface of the original roadbed 10 is processed with a roughened surface 13; the roughening depth of the roughened surface 13 is preferably 10 mm, and the spacing between adjacent roughening points is preferably 30 mm; through the roughening process, a sufficiently rough surface can be formed on the original roadbed 10, thereby enhancing the adhesion between the original roadbed 10 and the new roadbed 3.

[0089] The new roadbed 3 in the two areas is connected by several connecting bar groups; the connecting bar groups are used to fix the new roadbed 3 in the two areas; the several connecting bar groups are vertically set on the first retaining wall and spaced apart along the height direction of the first retaining wall; each connecting bar group includes several connecting bars 9, which are spaced apart along the length direction of the first retaining wall; one end of each connecting bar 9 is anchored to the new roadbed 3 in one area and the other end is anchored to the new roadbed 3 in the other area, thereby improving the integrity of the new roadbed 3 in the two areas;

[0090] The water level regulating device includes: a water level sensor 15 and a ballast water tank 16;

[0091] The water level sensor 15 is installed on the second retaining wall on the side of the reservoir. It can monitor the changes in the water level in the reservoir and convert the monitored changes in the water level into electrical signals.

[0092] like Figure 1 As shown, the ballast water tank 16 is positioned between the ground line 12 away from the reservoir and the second retaining wall on that side; as Figure 3 As shown, the ballast water tank 16 includes: a tank body, a volume control module, a control module, an inlet water passage, and an outlet water passage;

[0093] The volume control module includes: a motor 21, a screw 22, a pusher housing 23, and a volume control plate 24;

[0094] The tank is used to store water and is a hollow concrete structure. It is connected to the reservoir through water inlet and outlet channels. In this embodiment, the dimensions of the tank shell are 2×1×1m. After the tank capacity is released, the water level in area B is raised by 6m.

[0095] The motor 21 is located on the top of the housing, and its output end is coaxially fixed to the screw 22. The volume-regulating plate 24 is located inside the housing and slides against the inner wall of the housing. The push shell 23 is rotatably connected to the top of the volume-regulating plate 24. The push shell 23 is threaded and threaded with the screw 22. The motor 21 drives the screw 22 to rotate, causing the push shell 23 to rotate and rise relative to the screw 22. The volume-regulating plate 24 moves up and down relative to the housing as the push shell 23 rises and falls, thereby indirectly adjusting the water capacity inside the housing.

[0096] The control module is mounted on the housing and is electrically connected to the water level sensor 15. It receives electrical signals from the sensor and controls the opening and closing of the inlet and outlet channels based on these signals, thus enabling water intake and discharge operations. This ensures that the water level 1 in the reservoir remains within a set range, preventing changes in the water level 1 from altering the counterweight of the new roadbed 3. As an example, the control module includes a judgment module with a warning value. When the control module detects that the water level 1 measured by the water level sensor 15 exceeds the warning value, it opens the inlet channel, allowing water from the reservoir to flow into the housing. Water from the housing then flows into another area (the area away from the reservoir), quickly balancing the dynamic water pressure of the new roadbed 3 in both areas. When the water level 1 remains at a constant elevation, the water levels of the new roadbed 3 in both areas are essentially the same, preventing dynamic water pressure.

[0097] As an example, photovoltaic panels are integrated on the outer surface of the ballast tank 16 to power the control module and the calibrated module.

[0098] Example 2:

[0099] Based on Example 1, this example provides a lightweight structure for raising the roadbed in a reservoir-inundated area. When the original roadbed 10 has a side slope, the second retaining wall is set on the slope; when the original roadbed 10 does not have a side slope, the second retaining wall is directly set on the original roadbed 10. The second retaining wall is set on the slope (especially the slope near the reservoir), which can effectively prevent the original roadbed 10 and the new roadbed 3 from being impacted by river water, thereby ensuring the stability of the roadbed.

[0100] As an example, anti-slip steps are installed on the slope between the second retaining wall and the original roadbed 10; the anti-slip steps can prevent the foamed lightweight concrete from sliding down the slope when the new roadbed 3 is poured, ensuring that the foamed lightweight concrete is in close contact with the slope, thereby improving the integrity of the foamed lightweight concrete and the slope; as an example, the horizontal width of a single step of the anti-slip step (i.e. Figure 1 The transverse width (in the direction of the original roadbed 10) shall not be less than 0.75m, and the inward slope (i.e., the ratio of the vertical height to the horizontal width of a single step) shall be 2%.

[0101] As an example, each retaining wall 2 is an f-type concrete structure. A shotcrete layer is provided at the toe of the original roadbed 10 to reinforce the f-type concrete structure. A concrete cushion layer is provided on one side of the original roadbed 10, and the retaining wall 2 is installed on the concrete cushion layer.

[0102] The side ditch 11 on one side of the original roadbed 10 serves as the side ditch of the new roadbed 3; the new roadbed 3 is also equipped with drainage ditches, which can increase the road width.

[0103] Example 3:

[0104] Based on Example 1, this example provides a lightweight structure for raising the roadbed in reservoir flooding areas, and each area further includes: two or more carbon fiber meshes 14;

[0105] Two or more carbon fiber meshes 14 are stacked together.

[0106] The stacked carbon fiber mesh 14 is placed on the upper part of the anti-buoyancy anchor 5 and located inside the new roadbed 3. The carbon fiber mesh 14 can enhance the connection strength between the anti-buoyancy anchor 5 and the new roadbed 3, and further improve the anti-buoyancy capability of the new roadbed 3. When the tensile strength of the carbon fiber mesh 14 is 4.8 GPa, the overall anti-buoyancy capability of the new roadbed 3 can be increased by 1.5 times. As an example, two carbon fiber meshes 14 are preferred. The anti-buoyancy anchor 5 and the carbon fiber mesh 14 are connected by steel wire. As an example, the upper part of the anti-buoyancy anchor 5 is hooked to hook the stacked carbon fiber mesh 14 and then connected by steel wire.

[0107] Example 4:

[0108] Based on Example 1, this example provides a lightweight structure for raising the roadbed in a reservoir-inundated area, wherein the retaining wall 2 is an eco-friendly structure; the panel 19 of the retaining wall 2 facing the traffic protection zone is an eco-friendly lightweight soil panel made of vegetation concrete and porous foaming agent; the vegetation concrete contains vegetation seeds and nutrients, and the vegetation can grow spontaneously, avoiding the oppressive feeling caused by tall concrete blocks; the porous foaming agent increases the porosity to 65%, which can absorb noise and be used as a sound barrier; the exposed side of the retaining wall 2 (i.e., the side of the retaining wall 2 facing the traffic protection zone and the side facing the reservoir) is provided with several openings; each opening is provided with a culture tube for introducing microorganisms, which can repair the green soil and vegetation, improve the survival rate of vegetation, and improve the erosion resistance of the retaining wall 2; as an example, the diameter of each opening is preferably 1 cm; the eco-friendly lightweight soil panel can serve as a support and greening structure for the subsequent new roadbed 3;

[0109] In this embodiment, an anti-seepage component is provided between the original roadbed 10 and the retaining wall 2 near the reservoir to prevent soil loss and thus improve the reinforcement effect; the anti-seepage component includes: wire mesh, geotextile, several ecological bricks and several drainage pipes;

[0110] Several eco-bricks are set on the wall surface of the retaining wall 2 facing the raised part; each eco-brick has a snap-fit ​​groove on one side and a snap-fit ​​piece on the opposite side; each pair of adjacent eco-bricks is locked and fixed by the snap-fit ​​groove and snap-fit ​​piece.

[0111] Drainage pipes are installed on the eco-bricks to connect the elevated roadbed structure with the outside, thereby draining water from the elevated roadbed structure to the outside.

[0112] The wire mesh is laid on the eco-bricks, and the geotextile is placed on the wire mesh.

[0113] Example 5:

[0114] This embodiment provides a construction method for a lightweight roadbed elevation structure in a reservoir inundation area, used to fabricate the lightweight roadbed elevation structure in Embodiment 3. The construction method includes the following steps:

[0115] S1: Regional Division:

[0116] Two areas are divided on the original roadbed 10: a traffic maintenance area and a construction area. Personnel are assigned to direct traffic before and after the submerged section to be raised (and before and after the original roadbed 10), and the road conditions are adjusted according to the actual traffic volume so that vehicles can pass through the traffic maintenance area. In this embodiment, the area near the reservoir is designated as the construction area.

[0117] S2: Carry out construction in the construction area:

[0118] S201: Construction of the second retaining wall (retaining wall 2 located on one side of the original roadbed 10):

[0119] The panel foundation 17 is poured to form the second protective wall, and a panel 19 is set on each side of the panel foundation 17; the second protective wall forms a retaining wall, which can block the impact of water flow in the reservoir, and at the same time ensure the subsequent pouring of lightweight concrete.

[0120] When there is a slope on the side of the original roadbed 10, the anti-slip steps are constructed first; the anti-slip steps are excavated in sequence along the slope direction; anti-slip steps are set within 2m of the slope of the original roadbed 10 (this step is only carried out when there is a slope on the original roadbed 10);

[0121] S202: Construction of reinforced anchor bolt assembly:

[0122] Reinforcing anchor bolt groups are inserted sequentially on the second retaining wall and the original roadbed 10, thereby increasing the stability of the original roadbed 10;

[0123] S203: Anti-buoyancy treatment:

[0124] S2031: The original roadbed 10 is roughened to form a roughened surface 13;

[0125] S2032: Install anti-buoyancy anchor bolt assembly, with carbon fiber mesh 14 installed on the upper part of the anti-buoyancy anchor bolt assembly;

[0126] S204: Construction of the first retaining wall:

[0127] A panel foundation 17 is poured at the boundary between the construction area and the traffic maintenance area of ​​the original roadbed 10 to form the first retaining wall; a panel 19 is set on each side of the panel foundation 17. The first retaining wall can provide support and protection for the pouring of the new roadbed 3 during the subsequent construction of the traffic maintenance area; at this time, the second retaining wall and the first retaining wall form the pouring area of ​​the construction area (the height of the original roadbed 10 in the submerged section is lower than the height of the original roadbed in other sections); the first retaining wall of the retaining wall 2 faces the traffic maintenance area (i.e., Figure 1 Panel 19 on the right side of the first retaining wall is an eco-friendly lightweight soil panel, which reduces the discomfort caused to drivers by the tall concrete and the noise to surrounding residents.

[0128] S205: Construction of New Roadbed 3:

[0129] Foamed lightweight concrete is poured in the pouring area of ​​the construction zone to form a new roadbed 3; the pouring method adopts layered pouring, so that the thickness of each layer is controlled within a reasonable range (the thickness of each layer is preferably 30-50cm), and each layer is vibrated in time to eliminate air bubbles and voids.

[0130] S206: Construction of pavement structure layer 7 and guardrail 6:

[0131] S2061: Guardrail 6 is installed on the upper surface of new roadbed 3 and retaining wall 2; pavement structure layer 7 is installed on the upper surface of new roadbed 3, and the upper surface of pavement structure layer 7 is flush with the design elevation 8 of the pavement.

[0132] S2062: Perform maintenance on guardrail 6 and road structure layer 7;

[0133] After the maintenance was completed, the construction in the construction area was finished.

[0134] At this time, the road surface in the construction area is open to traffic.

[0135] S3: Carry out construction in the traffic control zone:

[0136] Once the road surface in the construction zone is ready for traffic, preparations will be made for the construction of the maintenance zone.

[0137] S301: Construct the second retaining wall in accordance with S201;

[0138] S302: Construct reinforced anchor bolt assemblies in accordance with S202;

[0139] S303: Anti-buoyancy treatment shall be carried out in accordance with S203;

[0140] S304: Construction of New Roadbed 3:

[0141] Foamed lightweight concrete is poured in the pouring area of ​​the maintenance zone to form the new roadbed 3 of the maintenance zone; the new roadbed 3 is still poured in layers; the connecting dowel group is inserted as each layer is poured, and one end of each connecting dowel 9 of the connecting dowel group is horizontally inserted into the new roadbed 3 from the maintenance zone to the construction zone, thereby improving the connectivity between the new roadbed 3 in the construction zone and the new roadbed 3 in the maintenance zone;

[0142] S305: Construct the road structure layer 7 and guardrail 6 in accordance with S206 to complete the construction of the traffic maintenance zone.

[0143] S4: Install water level regulating device:

[0144] A water level sensor 15 is installed on the panel 19 of the retaining wall 2 near the reservoir side, and a ballast water tank 16 is installed on the side of the retaining wall 2 away from the reservoir side and the ground line 12.

[0145] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A lightweight structure for raising the roadbed in reservoir-inundated areas, characterized in that, Set on the original roadbed (10), including: three retaining walls (2), several sets of reinforcing anchor bolts, several sets of connecting reinforcing bars, water level sensor (15) and ballast water tank (16). The three retaining walls (2) are located on both sides and in the middle of the original roadbed (10), forming two areas: the construction area and the traffic maintenance area. The reinforced anchor bolt groups are inserted on both sides of the original roadbed (10) in the width direction; Each area includes: a new roadbed (3), a pavement structure layer (7), and several anti-buoyancy anchor bolt groups; The new roadbed (3) is made of foamed lightweight concrete and is set on the upper surface of the original roadbed (10) by pouring. Several of the aforementioned anti-buoyancy anchor bolt groups are installed between the new roadbed (3) and the original roadbed (10); The road surface structure layer (7) is laid on the upper surface of the new roadbed (3); The connecting reinforcement group is set on the new roadbed (3) in the two areas and the retaining wall (2) located in the middle of the original roadbed (10); The water level sensor (15) is installed on the retaining wall (2) near the reservoir side; The ballast water tank (16) is located between the ground line (12) on the side away from the reservoir and the corresponding retaining wall (2). The ballast water tank (16) adjusts the internal water output according to the signal sent by the water level sensor (15) to balance the dynamic water pressure between the two areas.

2. The lightweight structure for raising the roadbed in a reservoir-inundated area as described in claim 1, characterized in that, The reinforced anchor bolt groups are evenly spaced along the height direction of the retaining wall (2); Each of the aforementioned reinforced anchor bolt groups contains several reinforced anchor bolts (4); Each of the reinforced anchor rods (4) is anchored at one end to the retaining wall (2) and at the other end to the original roadbed (10), and is arranged obliquely downward toward the original roadbed (10).

3. The lightweight structure for raising the roadbed in a reservoir-inundated area as described in claim 1, characterized in that, The upper surface of the original roadbed (10) is processed with a roughened surface (13). A side groove (11) is provided on one side of the roughened surface (13).

4. The lightweight structure for raising the roadbed in a reservoir-inundated area as described in claim 1, characterized in that, Each region also includes: two or more carbon fiber meshes (14). Two or more of the aforementioned carbon fiber meshes (14) are stacked and fixed on the upper part of the anti-buoyancy anchor group and located inside the corresponding new roadbed (3).

5. The lightweight structure for raising the roadbed in a reservoir-inundated area as described in claim 1, characterized in that, When the original roadbed (10) is provided with a slope on the side, the retaining walls (2) located on both sides of the original roadbed (10) are set on the slope; Anti-slip steps are provided on the slope between the retaining wall (2) and the original roadbed (10).

6. The lightweight structure for raising the roadbed in a reservoir-inundated area as described in claim 1, characterized in that, The ballast water tank (16) includes: a tank body, a volume control module, a control module, an inlet passage, and an outlet passage; The container is connected to the reservoir through an inlet and an outlet water passage. The volume control module includes: a motor (21), a screw (22), a pusher shell (23), and a volume control plate (24); The motor (21) is located on the top of the housing, and its output end is coaxially fixed to the screw (22); the sizing plate (24) is located inside the housing and slides with the inner wall of the housing; the push shell (23) is rotatably connected to the top of the sizing plate (24), and the push shell (23) is threaded and threaded with the screw (22); when the motor (21) drives the screw (22) to rotate, the push shell (23) rotates and rises relative to the screw (22), and the sizing plate (24) moves up and down relative to the housing as the push shell (23) rises and falls. The control module is installed on the housing and is electrically connected to the water level sensor (15). The control module controls the opening and closing of the water inlet and outlet passages according to the electrical signal emitted by the water level sensor (15).

7. The lightweight structure for raising the roadbed in a reservoir-inundated area as described in claim 6, characterized in that, Each of the aforementioned retaining walls (2) includes: a panel foundation (17), a tie rod steel mesh (18), and two panels (19). The panel base (17) is integrally formed from a horizontal part and a vertical part, with the vertical part being vertically set on the upper end face of the horizontal part; The tie rod steel mesh (18) is set in the vertical part of the panel foundation (17), and its plane is parallel to the plane of the horizontal part of the panel foundation (17); a plurality of the tie rod steel meshes (18) are evenly spaced along the height direction of the panel foundation (17). The two panels (19) are respectively installed on both sides of the width direction of the vertical part of the panel base (17).

8. A lightweight structure for raising the roadbed in a reservoir-inundated area as described in any one of claims 1-7, characterized in that, The retaining wall (2) facing the channel protection area panel (19) is made of ecological lightweight soil panel made of vegetation concrete and porous foaming agent; The exposed side of the protective wall (2) is provided with several openings; each opening is provided with a culture tube for introducing microorganisms.

9. The lightweight structure for raising the roadbed in a reservoir-inundated area as described in claim 8, characterized in that, Also includes: Waterproof components (25); The seepage prevention component (25) includes: wire mesh, geotextile, several ecological bricks and several drainage pipes; Several of the ecological bricks are set on the wall surface of the retaining wall (2) facing the raised part; each ecological brick has a snap-fit ​​groove on one side and a snap-fit ​​piece on the opposite side; every two adjacent ecological bricks are connected by the snap-fit ​​groove and the snap-fit ​​piece. The drainage pipe is inserted into the ecological bricks, connecting the elevated roadbed lightweight structure with the outside; The wire mesh is laid on the eco-bricks, and the geotextile is placed on the wire mesh.

10. A construction method for a lightweight structure for raising the roadbed in a reservoir-inundated area, characterized in that, The lightweight structure for raising the roadbed in reservoir inundation areas according to any one of claims 1-9 includes the following steps: S1: Divide the roadbed (10) into a traffic maintenance zone and a construction zone; S2: Carry out construction in the construction area, the construction method of which includes the following steps: S201: Casting to form a retaining wall (2) on one side of the original roadbed (10); S202: Reinforced anchor bolt groups are inserted sequentially on the retaining wall (2) and the original roadbed (10); S203: Roughen the original roadbed (10) and install anti-buoyancy anchor bolts; S204: Casting to form a retaining wall located at the boundary between the construction area and the traffic control area (2); S205: Layered pouring of foamed lightweight concrete to form a new roadbed (3); S206: Lay the road surface structural layer and carry out maintenance; S3: Carry out construction in the traffic maintenance zone. The construction method for the traffic maintenance zone includes the following steps: S301: Construct the retaining wall (2) of the maintenance zone in accordance with S201; S302: Construct reinforced anchor bolt assemblies in accordance with S202; S303: Anti-buoyancy treatment shall be carried out in accordance with S203; S304: Layered pouring of foamed lightweight concrete to form a new roadbed (3), and sequential insertion of connecting dowel groups as each layer is poured; S4: A water level sensor (15) is installed on the retaining wall (2) near the reservoir side, and a ballast water tank (16) is installed on the side of the retaining wall (2) away from the reservoir side and the ground line (12).

Images