Structure and method for controlling bumping at bridge head

Abstract

The invention relates to a structure and method for controlling bumping at a bridgehead, the structure comprises a bridge floor-bridge abutment system and a bridge floor-road surface transition system located on one side of the bridge floor-bridge abutment system, the bridge floor-road surface transition system comprises a road surface structure, and a grouting bin is arranged below the road surface structure; a pile system connected between the pavement structure and the grouting bin is arranged in a soil body between the grouting bin and the pavement structure, a plurality of layers of bin chambers containing consolidation slurry are arranged in the pressure drop bin, each bin chamber is provided with an induction mechanism connected with the control system to induce settlement of the soil body, and a grouting mechanism connected with the control system is arranged in each bin chamber. The grouting mechanism is connected with the grouting pipe, the outlet end of the grouting pipe extends into the soil body between the grouting bin and the pavement layer structure, each bin is communicated with an air inlet pipe and an exhaust pipe, the air inlet pipe is connected with the air supply mechanism, and by means of the structure treatment construction method, the labor intensity is low, and the workload is small.

Description

Technical Field

[0001] The invention relates to the technical field of traffic rock soil foundation treatment, and in particular to a structure and method for controlling vehicle jumping at a bridge head. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The bridgehead vehicle jump is caused by the differential settlement or expansion joint damage at the highway bridgehead and expansion joint (bridgehead approach), which causes the longitudinal slope of the road surface to appear steps, causing the vehicle to jump when passing. The road surface has different degrees of settlement and fracture at the backfill of the platform (the settlement value is generally 10 to 30cm, and some even exceed 60cm), causing the vehicle to jump and impact when passing, thereby causing additional impact loads on the bridge culvert and the road surface, making the driver and passengers feel bumpy and uncomfortable, and even causing the vehicle to slow down significantly. Severe cases can lead to traffic accidents (especially vehicle mechanical accidents). Therefore, the bridgehead vehicle jump problem has become an important factor affecting the engineering quality and cost of high-grade highways.

[0004] Patent application CN116695553A discloses a road-bridge transition structure and construction method for controlling vehicle jumping at a bridge head. When a certain position of the roadbed produces a large settlement, the cover plate of the slurry feed pipe is manually opened and lime milk is poured in. After the tank is slowly filled, the ball valve is opened, and the lime milk in the feed pipe consolidates the foundation at the settlement position to prevent it from settling. The asphalt covering layer at the corresponding position is broken, and the feed port on the top of the feed pipe and the water pipe cover are opened, and expansive cement and water are poured in to reduce the settlement difference caused by the roadbed.

[0005] The above patent requires manual opening of the slurry inlet pipe cover and pouring of lime milk when settlement occurs, and closing the slurry inlet pipe cover after filling. The foundation is consolidated with lime milk, which requires manual participation, high labor intensity, and a large construction workload. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a structure and method for controlling bridge head jumping, which can be automatically controlled without the manual participation of construction personnel, thereby improving efficiency, reducing the labor intensity of treatment, and reducing construction workload.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0008] In the first aspect, an embodiment of the present invention provides a structure for controlling a vehicle jumping at a bridge head, including a bridge deck-abutment system and a bridge deck-pavement transition system located on one side of the bridge deck-abutment system, the bridge deck-pavement transition system including a pavement structure, a grouting bin is provided below the pavement structure, a pile system connected between the pavement structure and the grouting bin is provided in the soil between the grouting bin and the pavement structure, a plurality of chambers containing consolidation slurry are provided in the pressure reduction bin, each chamber is provided with a sensing mechanism connected to a control system to sense the settlement of the soil, each chamber is provided with a grouting mechanism connected to the control system, the grouting mechanism is connected to a grouting pipe, the outlet end of the grouting pipe extends into the soil between the grouting bin and the pavement layer structure, each chamber is connected with an air intake pipe and an exhaust pipe, and the air intake pipe is connected to the air supply mechanism.

[0009] Optionally, the sensing mechanism includes a cylinder body, one end of which is located in the soil body, and the other end is located inside the chamber. A piston is slidably connected in the cylinder body, and the piston is connected to one end of a piston rod. The other end of the piston rod extends into the soil body outside the cylinder body and is connected to a displacement plate. The piston divides the cylinder body into a rod chamber and a rodless chamber. The piston rod is located in the rod chamber, and an air pressure sensor connected to the control system is provided in the rodless chamber.

[0010] Optionally, the grouting mechanism includes a supporting component, which is fixed inside the chamber. A grouting pump is provided on the supporting component. The inlet of the grouting pump is connected to the slurry inlet pipe. The slurry inlet pipe is provided with an electric-controlled valve. The outlet of the grouting pump is connected to the slurry inlet end of the grouting pipe. The grouting pump and the electric-controlled valve are both connected to the control system.

[0011] Optionally, the grouting mechanism in the bottom chamber of the grouting bin is provided with a grouting pipe whose outlet end extends into the foundation below the grouting bin.

[0012] Optionally, the pavement structure includes a hard soil layer, a crushed stone layer and a pavement asphalt layer laid in sequence from bottom to top, and a geotextile is laid between the pavement asphalt layer and the crushed stone layer.

[0013] Optionally, the pile system includes a plurality of pile bodies, the top of the pile body is provided with a pile cap, the pile cap cooperates with the bottom surface of the pavement structure, the bottom end of the pile body is provided with a pile seat, and the pile seat is fixedly connected to the grouting chamber through an anchoring component.

[0014] Optionally, a displacement detection element connected to a control system is provided in the soil between the grouting chamber and the pavement structure.

[0015] Optionally, the grouting chamber adopts a stepped structure, the top surface of the chamber at the top matches the bottom surface of the pavement structure, and a pile system is provided between the top surface of the chamber at the bottom and the bottom surface of the pavement structure.

[0016] In the second aspect, an embodiment of the present invention provides a working method for the structure for placing a bridge head jump vehicle as described in the first aspect: when the soil below the pavement structure settles, the sensing mechanism senses the settlement of the soil and sends a signal to the control system. The control system controls the grouting mechanism to inject the consolidation slurry in the chamber into the soil below the pavement structure through the grouting pipe, and grouting is performed on the soil to reinforce it, thereby consolidating the soft soil.

[0017] Optionally, circulating gas is introduced into the chamber at set intervals using an air inlet pipe and an air supply mechanism connected to the chamber to ensure the flow of the consolidation slurry in the chamber.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The structure for controlling bridge bumping of the present invention has a grouting chamber under the pavement structure, in which consolidation slurry is placed, and each chamber of the grouting chamber is provided with a sensing mechanism and a grouting mechanism. The sensing mechanism can sense the settlement of the soil, thereby triggering the grouting mechanism to use a grouting pipe to perform grouting reinforcement on the soil, thereby achieving consolidation of the soft soil, avoiding further settlement of the soil, and achieving control of the bridge bumping phenomenon. The entire soft soil grouting reinforcement is automatically performed by the sensing mechanism and the grouting mechanism without manual participation, thereby reducing the labor intensity of bridge bumping control treatment, improving construction efficiency, and reducing construction workload.

[0020] 2. The structure for controlling vehicle jumping at the bridge head of the present invention has a pile system whose bottom end is connected to a grouting chamber. The grouting chamber is used to accommodate the consolidation slurry. At the same time, the grouting chamber serves as the bearing layer of the pile system and can receive the traffic load transmitted from the upper part. It can ensure the lateral stability of the pile system and can ensure that it does not undergo excessive lateral displacement when it is subjected to the lateral traffic load from the upper part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0023] Figure 2 Schematic diagram of the sensing mechanism and grouting mechanism of embodiment 1 of the present invention;

[0024] Among them, 1. abutment, 2. bridge deck, 3. induction mechanism, 4. pressure reduction chamber, 5. control system, 6. hard soil layer, 7. crushed stone layer, 8. asphalt pavement layer, 9. geotextile, 10. pile body, 11. pile cap, 12. pile seat, 13. anchoring component, 14. supporting component, 15. grouting pump, 16. grouting pipe, 17. grouting pipe, 18. pneumatic valve, 19. cable, 20. pneumatic valve, 21. main grouting pipe, 22. branch grouting pipe, 23. pneumatic valve, 24. air inlet pipe, 25. displacement detection element;

[0025] 3-1. Cylinder, 3-2. Piston, 3-3. Piston rod, 3-4. Moving plate;

[0026] 4-1. Upper chamber, 4-2. Middle chamber, 4-3. Bottom chamber. DETAILED DESCRIPTION

[0027] Example 1

[0028] This embodiment provides a structure for controlling bridge jumping. Figure 1 As shown, it includes a bridge deck-abutment system and a bridge deck-pavement transition system located on one side of the bridge deck-abutment system. The bridge deck-abutment system includes an abutment 1 and a bridge deck 2. The bridge deck 2 is arranged on the top of the abutment 1, and the abutment 1 supports the bridge deck 2. The bridge deck-abutment system can adopt the existing technology, and its specific details are not described in detail here. The bridge deck-pavement transition system is used to be arranged between the bridge deck-abutment system and the pavement. The bridge deck-pavement transition system includes a pavement structure, and the top surface of the pavement structure is flush with the top surface of the bridge deck. A grouting bin 4 is provided below the pavement structure, and the grouting bin 4 is used to accommodate consolidation slurry. In this embodiment, the grouting bin 4 adopts a reinforced concrete structure, and its shape is stepped, and there are multiple layers distributed up and down inside. A chamber, wherein the top surface of the topmost chamber cooperates with the bottom surface of the pavement structure, a pile system is provided between the top surface of the bottommost chamber and the bottom surface of the pavement structure, each chamber contains consolidation slurry, each chamber is provided with a sensing mechanism 3, the sensing mechanism 3 is used to sense the settlement of the soil, the sensing mechanism 3 is connected to the control system 5, and can send a soil settlement signal to the control system 5, each chamber is provided with a grouting mechanism, the grouting mechanism is connected to the grouting pipe, the grouting pipe extends into the soil, and is used to grout the soil for grouting reinforcement to achieve soft soil consolidation, each chamber is also connected with an air inlet pipe and an exhaust pipe, the air inlet pipe is connected to the air supply mechanism, and the air supply structure can introduce gas into the chamber through the air inlet pipe to prevent the consolidation of the consolidation slurry in the chamber after standing for a long time.

[0029] The pavement structure extends to the end of the bridge deck-abutment system, and includes a hard soil layer 6, a crushed stone layer 7 and an asphalt pavement layer 8 laid in sequence from bottom to top. The laying of the hard soil layer 6, the crushed stone layer 7 and the asphalt pavement layer 8 can be carried out by using existing technology, which will not be described in detail here. A geotextile 9 is laid between the asphalt pavement layer 8 and the crushed stone layer 7. By setting the hard soil layer 6, the crushed stone layer 7 and the asphalt pavement layer 8, the flatness of the pavement structure can be effectively guaranteed, thereby ensuring the comfort and safety of the driver.

[0030] The top surface of the asphalt pavement layer 8 is flush with the top surface of the bridge deck 2 .

[0031] In this embodiment, the grouting chamber adopts a three-level stepped structure, each level has a chamber, which is divided into three chambers, namely the upper chamber 4-1, the middle chamber 4-2 and the bottom chamber 4-3, wherein the inner end of the lowest bottom chamber 4-3 extends to the bridge deck-abutment system, the top surface of the upper chamber 4-1 cooperates with the bottom surface of the pavement structure, and a pile system is provided in the soil between the top surface of the lower chamber 4-3 and the bottom surface of the pavement structure.

[0032] The pile system includes a plurality of vertically arranged pile bodies 10, a pile cap 11 is provided on the top of the pile body 10, the top surface of the pile cap 11 cooperates with the bottom surface of the pavement structure, a pile seat 12 is provided at the bottom end of the pile body 10, and the pile seat 12 is fixedly connected to the top of the bottom chamber 4-3 through an anchoring component 13.

[0033] In this embodiment, the anchoring component 13 may be a plurality of anchoring bolts, which will not be described in detail herein.

[0034] In this embodiment, the bottom end of the pile system is connected to the grouting chamber 4. The grouting chamber 4 is used to accommodate the consolidation slurry. At the same time, the grouting chamber serves as the bearing layer of the pile system and can receive the traffic load transmitted from the upper part. It can ensure the lateral stability of the pile system. When it bears the lateral traffic load from the upper part, it can ensure that it does not undergo excessive lateral displacement.

[0035] The walls of the upper chamber 4-1 and the middle chamber 4-2 close to the bridge deck-abutment system are both provided with a sensing mechanism 3, and the top wall of the bottom chamber 4-3 is provided with a sensing mechanism 3.

[0036] like Figure 2 As shown, the sensing mechanism 3 includes a cylinder body 3-1, which is fixedly connected to the warehouse wall of the warehouse chamber, wherein the warehouse walls of the upper warehouse chamber 4-1 and the middle warehouse chamber 4-2 for installing the sensing mechanism are inclined so that the cylinder body 3-1 can be vertically arranged, and one end of the cylinder body 3-1 is located in the soil outside the warehouse, and the other end is located inside the warehouse.

[0037] The cylinder body 3-1 is slidably connected with a piston 3-2, and the piston 3-2 can move along the axial direction of the cylinder body 3-1.

[0038] The piston 3-2 is connected to one end of the piston rod 3-3, and the other end of the piston rod 3-3 extends into the soil outside the cylinder body 3-1 and is connected to the movable plate 3-4. The piston 3-2 divides the internal space of the cylinder body 3-1 into a rodless chamber and a rod chamber, wherein the piston rod is located in the rod chamber, and the rodless chamber is filled with gas of set pressure so that the movable plate 3-4 can bear the pressure generated before the soil settles. An air pressure sensor is provided in the rodless chamber, and the air pressure sensor is connected to the control system for detecting the air pressure in the rodless chamber.

[0039] The grouting mechanism includes a supporting component 14, which is fixed inside the chamber. In this embodiment, the supporting component 14 is fixed at the bottom of the cylinder body 3-1. A grouting pump 15 is provided in the supporting component 14. The inlet of the grouting pump 15 is connected to a grouting pipe 16, and the outlet of the grouting pump 15 is connected to a grouting pipe 17. The grouting end of the grouting pipe 17 passes through the piston and the cylinder body and extends into the soil.

[0040] A seal is provided between the piston 3-2, the cylinder body 3-1 and the grouting pipe 17 to maintain sealing.

[0041] The grouting pump 15 is connected to the control system and can receive instructions from the control system to work. An electric control valve is installed on the slurry inlet pipe 16. Preferably, the electric control valve adopts a pneumatic valve 18, which is connected to the control system through a cable 19, and its operation is controlled by the control system.

[0042] Furthermore, an electric valve is also installed on the grouting pipe 17 . The electric-controlled valve adopts a pneumatic valve 20 . The pneumatic valve 20 is connected to the control system 5 via a cable, and its operation is controlled by the control system 5 .

[0043] Among them, a main grouting pipe 21 buried in the soil is provided below the bottom chamber, the main grouting pipe 21 is connected to multiple branch grouting pipes 22, the branch grouting pipes 22 are provided with electric control valves, and the electric control valves use pneumatic valves 23 connected to the control system through cables 19.

[0044] The branch grouting pipe 22 is connected to the outlet of the corresponding grouting pump 15 .

[0045] Each chamber is connected to an air intake pipe 24 and an exhaust pipe, and the air intake pipe 24 and the exhaust pipe extend above the road surface, wherein the air intake pipe 24 is connected to an air supply mechanism. In this embodiment, the air supply mechanism can adopt an existing air pump or air compressor, which will not be described in detail here. Gas can be injected into the consolidation slurry through the air intake pipe 24 to ensure the flow of the consolidation slurry in the chamber and prevent the consolidation slurry from standing still for a long time and solidifying.

[0046] Furthermore, a plurality of displacement detection elements 25 are buried in the soil between the bottom chamber 4-3 and the bottom surface of the pavement structure. The displacement detection element 25 uses an existing settlement monitoring sensor. Existing equipment can be used and will not be described in detail here. The settlement monitoring sensor is connected to the control system and can transmit the detected soil settlement value to the control system.

[0047] Preferably, since the soil settlement value near the abutment 1 is relatively large, the settlement monitoring sensor is buried in the soil near the abutment 1.

[0048] Example 2

[0049] The present embodiment provides a working method of the structure for controlling the bridge head jump-off described in Embodiment 1. When the soil body settles unevenly, the movable plate 3-4 moves downward under the pressure of the soil body, the piston 3-2 moves downward, and the air pressure in the rodless chamber of the cylinder body increases. When the air pressure sensor detects that the air pressure value is greater than the set threshold, a signal is sent to the control system 5. The control system 5 controls the grouting pump 15 to work, and the electric control valves of the grouting pipe 17 and the grouting pipe 16 are opened. The grouting pump 15 sprays consolidation slurry to the soft soil below the pavement structure and below the grouting chamber 4 through the grouting pipe 17, and grouts and reinforces the soft soil, so that the soft soil is consolidated, thereby avoiding further settlement of the soil body and realizing the control of the bridge head jump-off.

[0050] In this embodiment, when settlement occurs, the settlement amount of the soil is obtained through the settlement monitoring sensor, the injection amount of the consolidation slurry is obtained according to the settlement amount of the soil, and the working time of the grouting pump 15 is obtained according to the obtained injection amount.

[0051] Under normal conditions, the air supply mechanism is started at set intervals to inject air into the consolidation slurry in the chamber to make the consolidation slurry flow and prevent the consolidation slurry from standing still for a long time and solidifying.

[0052] In this embodiment, the consolidation of soft soil is automatically achieved through the grouting mechanism and the sensing mechanism, thereby achieving the control of bridge head jumping without human intervention, reducing labor intensity, improving treatment efficiency, and reducing the workload of treatment construction.

[0053] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A structure for controlling a vehicle jumping at a bridge head, characterized in that: It includes a bridge deck-abutment system and a bridge deck-pavement transition system located on one side of the bridge deck-abutment system. The bridge deck-pavement transition system includes a pavement structure. A grouting bin is provided below the pavement structure. A pile system connected between the pavement structure and the grouting bin is provided in the soil between the grouting bin and the pavement structure. A plurality of chambers containing consolidation slurry are provided in the pressure reduction bin. Each chamber is provided with a sensing mechanism connected to a control system to sense the settlement of the soil. A grouting mechanism connected to the control system is provided in each chamber. The grouting mechanism is connected to a grouting pipe. The outlet end of the grouting pipe extends into the soil between the grouting bin and the pavement layer structure. Each chamber is connected with an air intake pipe and an exhaust pipe. The air intake pipe is connected to the air supply mechanism.

2. A structure for controlling a bridge jump as claimed in claim 1, characterized in that: The sensing mechanism includes a cylinder body, one end of which is located in the soil body, and the other end is located inside the chamber. A piston is slidably connected to the cylinder body, and the piston is connected to one end of a piston rod. The other end of the piston rod extends into the soil body outside the cylinder body and is connected to a displacement plate. The piston divides the cylinder body into a rod chamber and a rodless chamber. The piston rod is located in the rod chamber, and an air pressure sensor connected to the control system is provided in the rodless chamber.

3. A structure for controlling a bridge jump as claimed in claim 1, characterized in that: The grouting mechanism includes a supporting component, which is fixed inside the chamber. A grouting pump is provided on the supporting component. The inlet of the grouting pump is connected to a grouting pipe. An electric control valve is provided on the grouting pipe. The outlet of the grouting pump is connected to the grouting end of the grouting pipe. The grouting pump and the electric control valve are both connected to a control system.

4. A structure for controlling a bridge jump as claimed in claim 1, characterized in that: The grouting mechanism in the chamber of the lowest layer of the grouting bin is provided with a grouting pipe whose grouting outlet end extends into the foundation below the grouting bin.

5. A structure for controlling a bridge jump as claimed in claim 1, characterized in that: The pavement structure comprises a hard soil layer, a crushed stone layer and a pavement asphalt layer which are laid in sequence from bottom to top, and a geotextile is laid between the pavement asphalt layer and the crushed stone layer.

6. A structure for controlling a bridge jump as claimed in claim 1, characterized in that: The pile system comprises a plurality of pile bodies, the top of the pile body is provided with a pile cap, the pile cap cooperates with the bottom surface of the pavement structure, the bottom end of the pile body is provided with a pile seat, and the pile seat is fixedly connected with the grouting chamber through an anchoring component.

7. A structure for controlling a bridge jump as claimed in claim 1, characterized in that: A displacement detection element connected to the control system is provided in the soil between the grouting chamber and the pavement structure.

8. The structure for controlling a bridge jump as claimed in claim 1, characterized in that: The grouting chamber adopts a stepped structure, the top surface of the chamber at the top matches the bottom surface of the pavement structure, and a pile system is provided between the top surface of the chamber at the bottom and the bottom surface of the pavement structure.

9. A working method of a structure for controlling a bridge jump according to any one of claims 1 to 8, characterized in that: When the soil under the pavement structure settles, the sensing mechanism senses the settlement of the soil and sends a signal to the control system. The control system controls the grouting mechanism to inject the consolidation slurry in the chamber into the soil under the pavement structure through the grouting pipe, and grouting is performed to reinforce the soil to achieve consolidation of the soft soil.

10. The working method of the structure for controlling a bridge jump as claimed in claim 9, characterized in that: At set intervals, circulating gas is introduced into the chamber through an air inlet pipe and an air supply mechanism connected to the chamber to ensure the flow of the consolidation slurry in the chamber.

Images