CN113957758B - Method for reinforcing bridge and road transition section of existing bridge under condition of uninterrupted traffic - Google Patents

Abstract

The invention discloses a method for strengthening the transition section of an existing bridge and road without interrupting traffic. The specific steps are as follows: S1: measuring and setting out; S2: working well construction; S3: receiving well construction; S4: jacking preparation; S5: jacking In the construction, the pipeline that replaces the filler will pass through the subgrade; S6: Reinforcement treatment. The method for strengthening the transition section of an existing bridge, bridge, and road without interruption of traffic according to the present invention can effectively reduce the settlement of the filler in the subgrade by utilizing the good bearing performance and deformation capacity of the pipe replacing the filler, and at the same time, the bridge, bridge and road can be effectively reduced. In the transition section, the filling in part of the roadbed is replaced by the pipeline that replaces the filling, so the self-weight of the filling can be effectively reduced, the load on the foundation and the settlement of the foundation can be reduced, and the above method does not need to excavate all the road surface to replace the filling pipeline. The landfill work can be carried out without interrupting traffic and other problems caused by the excavation of the roadbed can also be avoided.

Description

A Reinforcing Method for Transition Section of Existing Bridges and Roads Without Interrupting Traffic

technical field

The present invention relates to the technical field of bridges, and more particularly, the present invention relates to a method for strengthening the transition sections of existing bridges and roads without interrupting traffic conditions.

Background technique

The bridge-road transition section is the transitional part connecting the road and the bridge (culvert). It is different from the roadbed in terms of strength, stiffness and material. It is a weak part in highway engineering. It causes the bridge head to jump, which seriously affects the driving safety and comfort. Controlling the settlement of the filling and reducing the settlement of the foundation are the main methods to solve the uneven settlement of the bridge-road transition section, but the control of the amount of the filling is only applicable to the new bridge under construction. The amount of fillers can no longer be adjusted for the bridges of the existing bridges. When the filler control is performed on the existing bridges, it is necessary to close the road and conduct a comprehensive transformation of the bridge-road transition section. Therefore, it is necessary to propose a method for strengthening the transition sections of existing bridges and roads without interrupting traffic, so as to at least partially solve the problems existing in the prior art.

SUMMARY OF THE INVENTION

A series of concepts in simplified form have been introduced in the Summary section, which are described in further detail in the Detailed Description section. The Summary of the Invention section of the present invention is not intended to attempt to limit the key features and essential technical features of the claimed technical solution, nor is it intended to attempt to determine the protection scope of the claimed technical solution.

In order to at least partially solve the above problems, the present invention provides a method for strengthening the transition section of existing bridges and roads without interrupting traffic, and the specific steps are as follows:

S1: measurement stakeout;

S2: Work well construction;

S3: receiving well construction;

S4: jacking preparation;

S5: jacking construction, the pipeline that replaces the filler will pass through the subgrade;

S6: Reinforcement processing.

Preferably, step S1 also includes the following steps:

S101: According to the plane layout and spatial position of the existing bridge and bridge-road transition section site, measure and release the position and direction of the working well, the receiving well and the pipeline that replaces the filler;

S102: Set a temporary leveling point, and measure the excavation range and depth of the working well and the receiving well.

Preferably, step S2 also includes the following steps:

S201: According to the geological conditions and site conditions, excavate within the determined position and scope of the working well, and use supporting steel plates for immediate support;

S202: When the excavation reaches the design elevation, use concrete to pour the bottom plate and wall plate, and at the same time determine the thickness of the concrete and steel plate pads to meet the jacking requirements.

Preferably, step S3 also includes the following steps:

S301: According to the geological conditions and site conditions, excavate within the determined location and range of the receiving well, and use supporting steel plates for immediate support;

S302: When the excavation reaches the design elevation, the bottom plate and wall plate shall be poured with concrete to meet the requirements of strength and stability.

Preferably, step S4 also includes the following steps:

S401: Set up pipe jacking machine guide rails and hydraulic jacks in the working well;

S402: Install a roadheader at the front end of the pipeline that replaces the filling, and select and set the driving speed and the jacking speed according to the properties of the filling and the thickness of the covering layer.

Preferably, step S5 also includes the following steps:

S501: After the preparatory work is completed, start excavation and pipe jacking. When the pipe replacing the filler is jacked, the jacking parameters should be adjusted in time according to the ground monitoring data;

S502: During the excavation process, output the excavated filler to the ground;

S503: After the first section of the pipe with the substitute filler is jacked in, it is assembled with the pipe of the next section of the substitute filler to extend the length of the pipe with the substitute filler, and then the next section is jacked, and the cycle is repeated until the roadheader passes through the working well When the roadbed reaches the receiving well, the roadheader is lifted and recovered;

S504: At the same time, the pipeline of the replacement filler following the roadheader is buried between the working well and the receiving well, and the end of the first section of the pipeline of the replacement filler needs to be pushed out from the roadbed to the receiving well for a certain length. The jacking construction is over, and the pipelines replacing the fillers are all run through.

Preferably, step S6 also includes the following steps:

S601: After the penetration is completed, grouting is performed between the pipe of the substitute filler and the filler of the roadbed to strengthen the coupling between the pipe of the substitute filler and the filler;

S602: Finally, the port of the pipeline for replacing the filler is blocked to restore the road surface.

Preferably, step S501 further includes: the initial jacking speed should be controlled at 10-20 mm/min; during normal jacking, the jacking speed should be controlled at 20-30 mm/min.

Preferably, the pipeline for replacing the filler is a steel corrugated pipe;

Due to the thin thickness of the steel corrugated pipe, it needs to be processed for jacking. Several reinforcing steel pipes are arranged symmetrically in the axial direction inside the steel corrugated pipe to improve the axial rigidity of the steel corrugated pipe, and the reinforcing steel pipe and the steel corrugated pipe can be detachably connected;

The length of each section of steel corrugated pipe is set according to the specific situation, generally can be set to 2 ~ 3m.

Preferably, the steel corrugated pipes are connected by connecting pieces,

The end of the steel bellows is provided with a number of claw buckles, the claw buckles protrude outward along the radial direction of the steel bellows, and a plurality of the claw buckles are formed at the end of the steel bellows to form a a ring buckle adapted to the wave crest of the steel corrugated pipe, and two adjacent steel corrugated pipes are connected to the connecting piece through the ring buckle;

The connecting piece includes a tube body, a damping tube is arranged in the tube body, and the outer wall of the damping tube is connected with the inner wall of the tube body through a reed; the reed includes an elastic leaf with two states of initial and tension , the outer wall of the pipe body is provided with a plug-in chuck and a push-in clamp, the plug-in clamp and one end of the pipe body form an insertion end, and the push-in clamp is arranged at the end of the pipe body At the other end, a press-fit cavity is formed between the plug-in clip and the push-in clip, and the loops of the two steel bellows that are plugged into each other are clamped in the press-fit cavity and Compression deformation, the insertion end is inserted into the end of the steel corrugated pipe that is pushed forward first, and the end of the pipe body is in contact with the reinforced steel pipe, and the end of the steel corrugated pipe that is pushed backward The reinforcing steel pipe is in contact with the jacking chuck.

Compared with the prior art, the present invention at least includes the following beneficial effects:

1. The method for strengthening the transition section of existing bridges and roads under the condition of uninterrupted traffic according to the present invention can effectively reduce the settlement of the fillers in the roadbed by using the good bearing performance and deformation capacity of the pipelines that replace the fillers, and at the same time the bridges In the bridge-road transition section, the filling in part of the roadbed is replaced by the pipe that replaces the filling, so the self-weight of the filling can be effectively reduced, the load on the foundation and the settlement of the foundation can be reduced, and the above method does not need to excavate all the road surface to replace the filling. The landfill work of the pipeline can be carried out without interrupting the traffic, and other problems caused by the excavation of the roadbed can also be avoided.

For the method for strengthening the transition section of existing bridges and roads without interruption of traffic according to the present invention, other advantages, objectives and features of the present invention will be partly reflected in the following description, and partly will also be based on the research and practice of the present invention. understood by those skilled in the art.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

FIG. 1 is a process flow diagram of the reinforcement method according to the present invention.

FIG. 2 is a cross-sectional view of a bridge-bridge-road transition section after the reinforcement method according to the present invention is constructed.

3 is a cross-sectional view of the reinforcement method according to the present invention during construction.

FIG. 4 is a schematic structural diagram of a steel corrugated pipe in the reinforcement method according to the present invention.

FIG. 5 is a schematic structural diagram of a reinforced steel pipe in the reinforcement method according to the present invention.

FIG. 6 is a partial cross-sectional view of the connecting piece in the reinforcing method according to the present invention.

FIG. 7 is a schematic structural diagram of the insertion end of the connector and the steel corrugated pipe in the reinforcing method according to the present invention.

FIG. 8 is a cross-sectional view of two steel corrugated pipes being connected in the reinforcement method according to the present invention.

In the picture: 1 pipeline for filling replacement, 2 main beam, 3 support, 4 bridge abutment, 5 subgrade, 6 road surface, 7 side slope, 8 supporting steel plate, 9 soil mass, 10 steel corrugated pipe crest, 11 steel corrugated pipe Valley, 12 reinforced steel pipe, 13 connector, 14 claw buckle, 15 tube body, 16 damping tube, 17 reed, 18 plug-in chuck, 19 push-in chuck, 20 insertion end, 21 press-fit cavity.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement the invention with reference to the description.

It should be understood that terms such as "having", "comprising" and "including" as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

As shown in FIG. 1-FIG. 8, the present invention provides a method for strengthening the transition section of an existing bridge and road without interrupting traffic. The specific steps are as follows:

S1: measurement stakeout;

S2: Work well construction;

S3: receiving well construction;

S4: jacking preparation;

S5: jacking construction, the pipeline 1 that replaces the filler will pass through the road foundation;

S6: Reinforcement processing.

The working principle of the above technical scheme: before construction, it is necessary to sample and measure the soil around the transition section of the bridge, bridge and road to determine the excavation depth and excavation range, and plan the working well and the receiving well; The working well and the receiving well are excavated, and the roadheader, jacking equipment and the pipeline 1 of the substitute filler are set in the work well. After the preparation is complete, the excavation of the roadbed can be started and the pipeline 1 of the substitute filler can be jacked in with the roadheader. Subgrade until the pipe 1 of the substitute filler penetrates the subgrade, and then pouring and reinforcement treatment is performed between the pipe 1 of the substitute filler and the filler of the roadbed, and then the two ends of the pipe 1 of the substitute filler are encapsulated and the road surface can be restored.

The beneficial effects of the above technical solutions: the good bearing performance and deformation capacity of the pipeline 1 that replaces the filler can effectively reduce the settlement of the filler in the roadbed, and at the same time, the transition section of the bridge and bridge is replaced by the pipeline 1 that replaces the filler. Part of the roadbed Therefore, the self-weight of the filler can be effectively reduced, thereby reducing the load on the foundation and reducing the settlement of the foundation, and the above method does not need to excavate all the road surface for the filling of the pipeline 1 to replace the filler, which can be used without interruption of traffic. It can also be carried out under the conditions of excavation, and other problems caused by the excavation of the roadbed can also be avoided.

In one embodiment, step S1 further includes the following steps:

S101: According to the plane layout and spatial position of the existing bridge and bridge transition section site, measure and release the position and direction of the working well, the receiving well and the pipeline 1 for replacing the filler;

S102: Set a temporary leveling point, and measure the excavation range and depth of the working well and the receiving well.

The working principle and beneficial effects of the above technical solutions: when measuring and setting out, firstly, it is necessary to measure and calculate the layout and spatial position of the existing bridge, bridge and road transition section site, and plan the position of the working well and the receiving well. Plan the position, length and direction of the pipeline 1 to replace the filler, then set up temporary benchmarking points, and calculate the excavation range and depth of the working well and the receiving well according to the site environment, soil quality and geology, so that the subsequent construction can be carried out. According to the soil quality and geology, the working well and the receiving well are immediately supported to prevent landslides.

In one embodiment, step S2 also includes the following steps:

S201: According to the geological conditions and site conditions, excavate within the determined position and scope of the working well, and use the support steel plate 8 for immediate support;

S202: When the excavation reaches the design elevation, use concrete to pour the bottom plate and wall plate, and at the same time determine the thickness of the concrete and steel plate pads to meet the jacking requirements.

Step S3 also includes the following steps:

S301: According to the geological conditions and site conditions, excavate within the determined location and range of the receiving well, and use the support steel plate 8 for immediate support;

S302: When the excavation reaches the design elevation, the bottom plate and wall plate shall be poured with concrete to meet the requirements of strength and stability.

The working principle and beneficial effects of the above technical solutions: according to the scope of stakeout and planning, the working well and the receiving well are excavated, and the soil body 9 of the side wall is supported by the supporting steel plate 8 at the same time, so as to avoid landslides during the excavation process. In case of casualties and equipment damage, when digging to the design level, pour concrete for the bottom plate and wall plate to avoid collapse. Because related equipment needs to be erected in the working well, it is necessary to lay steel plate pads at the bottom and ensure the thickness of the steel plate pads. It can meet the equipment requirements, and the receiving well is only used for receiving equipment, so the strength and stability of the pouring can meet the requirements of the relevant geological conditions and site conditions.

In one embodiment, step S4 also includes the following steps:

S401: Set up pipe jacking machine guide rails and hydraulic jacks in the working well;

S402: Install a roadheader at the foremost end of the pipeline 1 that replaces the filling, and select and set the driving speed and the jacking speed according to the properties of the filling and the thickness of the covering layer.

The working principle and beneficial effects of the above technical solutions: during the preparation work, it is necessary to install the guide rail of the pipe jacking machine and the hydraulic jack in the working well in advance, and then install the front end of the first section of the pipeline 1 that replaces the filler on the roadheader, and According to the properties of the filling and the thickness of the covering layer, the excavation speed and jacking speed are calculated.

In one embodiment, step S5 also includes the following steps:

S501: After the preparatory work is completed, start excavation and pipe jacking. When the pipe 1 replacing the filler is jacked, the jacking parameters should be adjusted in time according to the ground monitoring data; the initial jacking speed should be controlled at 10-20mm/min; during normal jacking , the jacking speed should be controlled at 20 ~ 30mm/min;

S502: During the excavation process, output the excavated filler to the ground;

S503: After the first section of the pipeline 1 for filling replacement is jacked, it is assembled with the pipeline 1 for replacing the filling in the next section to extend the length of the pipeline 1 for replacing the filling, and then the next section is jacked. The well goes through the roadbed to the receiving well, and the roadheader is hoisted and recovered;

S504: At the same time, the pipeline 1 of the substitute filler following the roadheader is buried between the working well and the receiving well, and the end of the pipeline 1 of the first section of substitute filler needs to be pushed out from the roadbed to the receiving well for a certain length , the entire jacking construction is over, and the pipeline 1 replacing the filler is fully connected.

The working principle and beneficial effects of the above technical solutions: the pipelines 1 of the substitute fillers running through the roadbed are formed by connecting several pipes in twos, so that the pipelines 1 of the substitute fillers will not be limited by the total length, and the work can be reduced as much as possible. The area of the well can reduce the occupation of nearby roads or sites. In order to avoid the collapse of the bridge due to excessive driving force, the jacking speed should not be too fast. When all the roadheaders enter the subgrade of the bridge, it can be appropriately accelerated. The jacking speed. After the roadheader is taken out of the receiving well, it is necessary to continue to jack up the pipeline 1 of the substitute filler until a part of the pipeline 1 of the substitute filler of the first section extends into the receiving well, thus ensuring the pipeline 1 of the substitute filler. The roadbed shall be penetrated all the way to avoid that the subgrade is not fully penetrated by the pipeline 1 of the substitute filler, resulting in the collapse of the roadbed due to lack of support or uneven force.

In one embodiment, step S6 also includes the following steps:

S601: After the penetration is completed, grouting is performed between the pipeline 1 of the substitute filler and the filler of the roadbed, so as to strengthen the coupling between the pipeline 1 of the substitute filler and the filler;

S602: Finally, plug the port of the pipeline 1 for replacing the filler, and restore the road surface.

The working principle and beneficial effects of the above technical solutions: after the completion of the penetration, grouting is performed between the pipeline 1 of the substitute filler and the filler of the roadbed, which can increase the coupling between the pipeline 1 of the substitute filler and the filler, prevent its displacement and pass the grouting at the same time. Connecting with the filler as a whole can make the force more uniform, and finally close the port of the pipe 1 that replaces the filler and restore the road surface.

In one embodiment, the pipeline 1 for replacing the filler is a steel corrugated pipe;

Due to the thin thickness of the steel bellows, it needs to be processed for jacking. Several reinforcing steel pipes 12 are arranged symmetrically in the axial direction inside the steel bellows to improve the axial rigidity of the steel bellows. The reinforced steel pipes 12 and the steel bellows can be disassembled. connect;

The length of each section of steel corrugated pipe is set according to the specific situation, generally can be set to 2 ~ 3m.

The working principle and beneficial effects of the above technical solutions: the pipe 1 that replaces the filler adopts the steel corrugated pipe. Since the thickness of the steel corrugated pipe is relatively thin, it is necessary to set a reinforcing steel pipe 12 inside it during the jacking process to improve the strength of the steel corrugated pipe. Axial stiffness prevents the steel corrugated pipe from breaking during the jacking process. After the penetration, the reinforcing steel pipe 12 can be removed. The steel corrugated pipe has good bearing performance and deformation ability, and can be used when the car passes through the transition section. The force of the car on the roadbed is used to disperse the stress through the radial deformation of the steel bellows. When multiple cars pass through the transition section, the steel bellows will axially disperse through the extrusion deformation between the wave crest and the wave trough. The stress is dispersed, thereby reducing the settlement of the foundation, and also reducing the quality of the filler.

In one embodiment, the steel corrugated pipes are connected by connecting pieces 13,

The end of the steel bellows is provided with a plurality of claw buckles 14, the claw buckles 14 protrude outward along the radial direction of the steel bellows, and a plurality of the claw buckles 14 are located at the ends of the steel bellows. A ring is formed in the part that is adapted to the crest of the steel corrugated pipe, and two adjacent steel corrugated pipes are connected to the connecting piece 13 through the ring;

The connecting piece 13 includes a tube body 15, and the tube body 15 is provided with a damping tube 16. The outer wall of the damping tube 16 is connected with the inner wall of the tube body 15 through a reed 17; For the elastic pieces in the initial and stretched states, the outer wall of the tube body 15 is provided with a plug-in clip 18 and a push-in clip 19, and the plug-in clip 18 and one end of the tube body 15 form an insertion end 20. The push-in chuck 19 is disposed at the other end of the pipe body 15, a pressing cavity 21 is formed between the plug-in chuck 18 and the push-in chuck 19, and the two mutually inserted The buckles of each steel bellows are snapped into the pressing cavity 21 and compressively deformed. The end portion is in contact with the reinforced steel pipe 12 , and the reinforced steel pipe 12 in the steel corrugated pipe that is pushed back in contact with the jacking chuck 19 .

The working principle of the above technical solution: when two steel corrugated pipes are connected, first insert the insertion end 20 of the connecting piece 13 into the previous steel corrugated pipe, at this time, the ring buckle of the previous steel corrugated pipe will be inserted through the plug connection. The clamp head 18 is clamped with the pipe body 15, because the claw buckle 14 is provided with a protrusion and the ring buckle is adapted to the wave crest of the steel corrugated pipe, so the outer wall of the plug-in clamp head 18 will be clamped on the inner wall of the ring buckle, Then, the loops of the steel bellows at the back are clamped through the jacking head 19. At this time, the loops of the two steel bellows are located in the pressing cavity 21. Under the action of the hydraulic jack, the steel bellows behind The reinforced steel pipe 12 inside the corrugated pipe will abut on the jacking head 19, push the jacking head 19 to push the pipe body 15 and then push the insertion end 20 to go deeper into the previous steel corrugated pipe, and make the insertion end 20 move further. The end of the pipe body 15 is in contact with the end of the reinforcing steel pipe 12 in the preceding steel corrugated pipe and pushes the preceding steel corrugated pipe to move. The claw buckle 14 protruding from the pressing cavity 21 is squeezed and deformed, so that the loops of the two steel bellows are fixed in the pressing cavity 21 due to the squeeze deformation, thereby realizing the connection of the two steel bellows.

The beneficial effects of the above technical solutions: through the design of the above structure, the reinforced steel pipe 12 in the previous steel bellows has been squeezed and pushed by the hydraulic jack, so it will perfectly fit on the inner wall of the steel bellows and is not easily deformed. , so only the end of the pipe body 15 can be pushed, and the reinforcing steel pipes 12 in the steel bellows after installation cannot ensure that all the end faces are flush and all the reinforcing steel pipes 12 are in the center axis of the steel bellows. In the parallel position, there will be relative movement between the steel bellows and the steel bellows after extrusion, so the front end of the reinforcing steel pipe 12 in the steel bellows needs to have a large enough contact area to prevent contact with the connecting piece. 13. Disengaged, the pressing cavity 21 can use the properties of the buckle itself to fill the pressing cavity 21 through deformation under the extrusion of the tunnel to realize the connection of the two steel bellows. The packing inside generates pressure, and the pressure is transmitted to the steel bellows, which can dissipate the radial and axial stress through its own ring and wave peaks and troughs, and the connecting piece 13 can transmit the stress to the damping tube through the reed 17 16, through the oscillation of the damping tube 16 to dissipate the stress, so that the connector 13 can also diffuse the stress to increase the service life of the connector 13, to avoid fatigue damage caused by repeated stress for a long time. Happening.

In one embodiment, when selecting the pipeline 1 with the replacement filler, it is necessary to first calculate the maximum radial bending strain value δ that the filler can produce on the pipe wall of the pipeline 1 with the replacement filler according to the geographical environment of the transition section, and then use the following formula Calculate the diameter R of the pipe 1 that replaces the packing

R=±(C/δ)((3ΔY/R)/1-(2ΔY/R))

where R is the diameter of the pipe 1 that replaces the filler; C is the thickness of the pipe 1 that replaces the filler; δ is the maximum strain value of the pipe wall due to radial bending; ΔY is the radial decrease of the pipe diameter of the pipe 1 that replaces the filler ;

Through the above formula, the corresponding thickness can be calculated according to the required diameter or the corresponding diameter can be calculated according to the required thickness.

The working principle and beneficial effects of the above technical solutions: through the above formula, the corresponding diameter or thickness can be selected according to the needs of the construction, so as to ensure that the pipe 1 that replaces the filler can have sufficient radial bending strain value, and avoid the inability to select the thickness and diameter. Meeting the requirements of the strain value causes the pipe 1 to replace the filler to collapse due to the inability to bear the weight of the filler in the foundation.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, and it can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (7)

1. A method for reinforcing the transition section of an existing bridge and a bridge under the condition of not interrupting traffic is characterized by comprising the following specific steps of:

s1: measuring and lofting;

s2: constructing a working well;

s3: constructing a receiving well;

s4: preparing jacking;

s5: jacking construction, wherein a pipeline (1) for replacing the filler penetrates through the roadbed;

s6: reinforcement treatment;

the step S5 also comprises the following steps:

s501: after the preparation work is finished, starting tunneling and jacking, and adjusting jacking parameters in time according to ground monitoring data when the pipeline (1) replacing the filler is jacked;

s502: during the tunneling process, the dug filler is output to the ground;

s503: after the first section of pipeline (1) for replacing the filler is jacked, the first section of pipeline is spliced with the next section of pipeline (1) for replacing the filler so as to prolong the length of the pipeline (1) for replacing the filler, then the next section of pipeline is jacked, and the process is repeated until the heading machine passes through the roadbed from the working well to the receiving well, and the heading machine is hoisted and recovered;

s504: meanwhile, a pipeline (1) for replacing the filler, which is arranged behind the heading machine, is buried between the working well and the receiving well, the end part of the first section of pipeline (1) for replacing the filler needs to be pushed out from the roadbed to the receiving well for a certain length, the whole jacking construction is finished, and the pipeline (1) for replacing the filler is completely communicated;

the pipeline (1) for replacing the filler is a steel corrugated pipe;

because the thickness of the steel corrugated pipe is thin, the steel corrugated pipe needs to be processed for jacking, a plurality of reinforcing steel pipes (12) are symmetrically arranged in the steel corrugated pipe along the axial direction to improve the axial rigidity of the steel corrugated pipe, and the reinforcing steel pipes (12) are detachably connected with the steel corrugated pipe;

the corrugated steel pipes are connected through a connecting piece (13),

the end part of the corrugated steel pipe is provided with a plurality of claws (14), the claws (14) are outwards protruded along the radial direction of the corrugated steel pipe, the claws (14) form buckles matched with wave crests of the corrugated steel pipe at the end part of the corrugated steel pipe, and two adjacent corrugated steel pipes are connected with the connecting piece (13) through the buckles;

the connecting piece (13) comprises a pipe body (15), a damping pipe (16) is arranged in the pipe body (15), and the outer wall of the damping pipe (16) is connected with the inner wall of the pipe body (15) through a reed (17); the reed (17) comprises elastic sheets in an initial state and a stretching state, a plug-in chuck (18) and a jacking chuck (19) are arranged on the outer wall of the pipe body (15), the plug-in chuck (18) and one end of the pipe body (15) form a plug-in end (20), the jacking chuck (19) is arranged at the other end of the pipe body (15), a pressing cavity (21) is formed between the plug-in chuck (18) and the jacking chuck (19), the buckles of the two steel corrugated pipes which are mutually plugged are clamped in the pressing cavity (21) and are compressed and deformed, the plug-in end (20) is inserted into the tail end of the steel corrugated pipe which is firstly jacked, the end of the pipe body (15) is abutted to the reinforced steel pipe (12), and the reinforced steel pipe (12) in the steel corrugated pipe which is secondly jacked is abutted to the jacking chuck (19).

2. The method for reinforcing the transition section of the existing bridge and road bridge under the condition of not interrupting traffic as claimed in claim 1, wherein the step S1 further comprises the steps of:

s101: measuring the positions of a working well and a receiving well and the position and the trend of a pipeline (1) for replacing fillers according to the on-site plane arrangement and the space position of the transition section of the bridge and the road of the existing bridge;

s102: and setting a temporary leveling point, and measuring the excavation range and depth of the working well and the receiving well.

3. The method for reinforcing the transition section of the existing bridge and road bridge without traffic interruption of claim 1, wherein the step S2 further comprises the steps of:

s201: excavating in the determined position and range of the working well according to the geological condition and the field condition, and carrying out instant supporting by adopting a supporting steel plate (8);

s202: when the designed elevation is to be excavated, the bottom plate and the wall plate are poured by concrete, and the thickness of the concrete and the steel plate cushion block is determined to meet the jacking requirement.

4. The method for reinforcing a bridge transition section of an existing bridge without interrupting traffic as set forth in claim 1, wherein the step S3 further comprises the steps of:

s301: excavating in the determined position and range of the receiving well according to the geological condition and the field condition, and carrying out instant supporting by adopting a supporting steel plate (8);

s302: when the designed elevation is excavated, the bottom plate and the wall plate are poured by concrete, and the requirements on strength and stability are met.

5. The method for reinforcing the transition section of the existing bridge and road bridge without traffic interruption of claim 1, wherein the step S4 further comprises the steps of:

s401: arranging a pipe jacking machine guide rail and a hydraulic jack in the working well;

s402: and installing a tunneling machine at the foremost end of the pipeline (1) for replacing the filler, and selecting and setting the tunneling speed and the jacking speed according to the filling property and the thickness of the covering layer.

6. The method for reinforcing a bridge transition section of an existing bridge without interrupting traffic as claimed in claim 1, wherein the step S501 further comprises: the initial jacking speed is preferably controlled to be 10-20 mm/min; during the normal jacking period, the jacking speed is preferably controlled to be 20-30 mm/min.

7. The method for reinforcing a bridge transition section of an existing bridge without interrupting traffic of claim 1,

the step S6 also comprises the following steps:

s601: after the penetration is finished, grouting treatment is carried out between the pipeline (1) for replacing the filler and the filler of the roadbed so as to strengthen the coupling between the pipeline (1) for replacing the filler and the filler;

s602: finally, plugging the port of the pipeline (1) for replacing the filler, and recovering the pavement; the length of each section of the steel corrugated pipe is set according to specific conditions.

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