CN113957758A - Method for reinforcing bridge and road transition section of existing bridge under condition of uninterrupted traffic - Google Patents
Method for reinforcing bridge and road transition section of existing bridge under condition of uninterrupted traffic Download PDFInfo
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- CN113957758A CN113957758A CN202111209208.0A CN202111209208A CN113957758A CN 113957758 A CN113957758 A CN 113957758A CN 202111209208 A CN202111209208 A CN 202111209208A CN 113957758 A CN113957758 A CN 113957758A
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- filler
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/006—Foundations for pavings made of prefabricated single units
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- Structural Engineering (AREA)
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Abstract
The invention discloses a method for reinforcing the transition section of an existing bridge and road under the condition of not interrupting traffic, which comprises the following 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 for replacing the filler penetrates through the roadbed; s6: and (6) reinforcing. The method for reinforcing the transition section of the existing bridge and the road bridge under the condition of not interrupting traffic can effectively reduce the settlement of the filler in the roadbed by utilizing the good bearing performance and the deformation capacity of the pipeline for replacing the filler, and meanwhile, the bridge and the road bridge transition section replaces part of the filler in the roadbed through the pipeline for replacing the filler, so that the self weight of the filler can be effectively reduced, the load on the foundation is reduced, the settlement of the foundation is further reduced, and the method does not need to completely dig the road surface for the landfill work of the pipeline for replacing the filler, can be carried out under the condition of not interrupting traffic, and can also avoid other problems caused by digging the roadbed.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a method for reinforcing a bridge-road transition section of an existing bridge under the condition of not interrupting traffic.
Background
The bridge-road transition section is a transition part for connecting a road and a bridge (culvert), is different from a roadbed in the aspects of strength, rigidity and material, is a weak part in highway engineering, is mainly damaged by uneven settlement, is easy to cause vehicle jump at the bridge head, seriously influences the driving safety and comfort, controls the settlement of fillers and reduces the settlement of a foundation, is a main method for solving the uneven settlement of the bridge-road transition section, but controls the dosage of the fillers only suitable for a new bridge under construction, cannot adjust the dosage of the fillers for the bridge which is already built, and needs to be completely reformed by closing a road when the existing bridge is subjected to the filler control. Accordingly, there is a need for a method of reinforcing an existing bridge transition without interrupting traffic to at least partially solve the problems of the prior art.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to at least partially solve the problems, the invention provides a method for reinforcing the transition section of the existing bridge and road bridge without interrupting traffic conditions, which comprises the following specific steps:
s1: measuring and lofting;
s2: constructing a working well;
s3: constructing a receiving well;
s4: preparing jacking;
s5: jacking construction, wherein a pipeline for replacing the filler penetrates through the roadbed;
s6: and (6) reinforcing.
Preferably, step S1 further includes the following steps:
s101: measuring the positions of a working well and a receiving well and the positions and the trends of pipelines for replacing fillers according to the on-site plane arrangement and the spatial position of the transition section of the bridge and the road;
s102: and setting a temporary level point, and measuring and setting the excavation range and depth of the working well and the receiving well.
Preferably, step S2 further includes the following steps:
s201: excavating in the determined position and range of the working well according to the geological condition and the field condition, and adopting a supporting steel plate for instant supporting;
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.
Preferably, step S3 further includes the following steps:
s301: excavating in the determined position and range of the receiving well according to the geological condition and the field condition, and adopting a supporting steel plate for instant supporting;
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.
Preferably, step S4 further includes the following steps:
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 for replacing the filler, and selecting and setting the tunneling speed and the jacking speed according to the filling property, the thickness of the covering layer and the like.
Preferably, step S5 further includes 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 replacing the filler is jacked;
s502: during the tunneling process, the excavated filler is output to the ground;
s503: after the first section of pipeline for replacing the filler is jacked, the first section of pipeline is spliced with the next section of pipeline for replacing the filler so as to prolong the length of the pipeline 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, the pipeline 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 pipeline for replacing the filler in the first section needs to be pushed out to the receiving well for a certain length from the roadbed, the whole jacking construction is finished, and the pipeline for replacing the filler is completely communicated.
Preferably, step S6 further includes the following steps:
s601: after the communication is finished, grouting treatment is carried out between the pipeline replacing the filler and the filler of the roadbed so as to strengthen the coupling between the pipeline replacing the filler and the filler;
s602: and finally, plugging the port of the pipeline for replacing the filler to recover the pavement.
Preferably, step S501 further includes: 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.
Preferably, the pipe 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 are symmetrically arranged in the steel corrugated pipe along the axial direction so as to improve the axial rigidity of the steel corrugated pipe, and the reinforcing steel pipes are detachably connected with the steel corrugated pipe;
the length of each section of corrugated steel pipe is set according to specific conditions and can be generally set to be 2-3 m.
Preferably, the corrugated steel pipes are connected through connecting pieces,
the end part of the corrugated steel pipe is provided with a plurality of claw buckles, the claw buckles are outwards protruded along the radial direction of the corrugated steel pipe, a plurality of claw buckles form ring 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 through the ring buckles;
the connecting piece comprises a pipe body, a damping pipe is arranged in the pipe body, and the outer wall of the damping pipe is connected with the inner wall of the pipe body through a reed; the reed comprises elastic sheets in an initial state and a stretching state, a plug-in chuck and a jacking chuck are arranged on the outer wall of the pipe body, the plug-in chuck and one end of the pipe body form an insertion end, the jacking chuck is arranged at the other end of the pipe body, a pressing cavity is formed between the plug-in chuck and the jacking chuck, the buckles of the two corrugated steel pipes which are mutually plugged are all clamped in the pressing cavity and are in compression deformation, the insertion end is inserted into the tail end of the corrugated steel pipe which is firstly jacked, the end of the pipe body is abutted to the reinforced steel pipe, and the reinforced steel pipe in the corrugated steel pipe which is jacked later is abutted to the jacking chuck.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. the method for reinforcing the transition section of the existing bridge and the road bridge under the condition of not interrupting traffic can effectively reduce the settlement of the filler in the roadbed by utilizing the good bearing performance and the deformation capacity of the pipeline for replacing the filler, and meanwhile, the bridge and the road bridge transition section replaces part of the filler in the roadbed through the pipeline for replacing the filler, so that the self weight of the filler can be effectively reduced, the load on the foundation is reduced, the settlement of the foundation is further reduced, and the method does not need to completely dig the road surface for the landfill work of the pipeline for replacing the filler, can be carried out under the condition of not interrupting traffic, and can also avoid other problems caused by digging the roadbed.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
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 transition section constructed by the reinforcement method of the present invention.
Fig. 3 is a cross-sectional view illustrating a reinforcing method according to the present invention.
Fig. 4 is a schematic structural diagram of a corrugated steel pipe in the reinforcing method according to the present invention.
Fig. 5 is a schematic structural view of a reinforced steel pipe in the reinforcement method according to the present invention.
Fig. 6 is a partial sectional view of a connector in the reinforcement method according to the present invention.
Fig. 7 is a schematic structural diagram of the insertion end of the connector and the corrugated steel pipe in the reinforcing method according to the present invention.
Fig. 8 is a sectional view of two corrugated steel pipes connected in the reinforcing method according to the present invention.
In the figure: 1 pipeline replacing filler, 2 main beam, 3 support, 4 bridge abutment, 5 roadbed, 6 road surface, 7 side slope, 8 supporting steel plate, 9 soil body, 10 corrugated steel pipe wave crest, 11 corrugated steel pipe wave trough, 12 reinforced steel pipe, 13 connecting piece, 14 claw buckle, 15 pipe body, 16 damping pipe, 17 reed, 18 plug-in chuck, 19 jacking chuck, 20 plug-in end and 21 pressing cavity.
Detailed Description
The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1-8, the present invention provides a method for reinforcing a bridge transition section of an existing bridge without interrupting traffic, which comprises the following steps:
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: and (6) reinforcing.
The working principle of the technical scheme is as follows: before construction, firstly, sampling and measuring soil around a bridge and road transition section of a bridge, determining the excavation depth and the excavation range, and performing lofting planning on a working well and a receiving well; and then, constructing and excavating the working well and the receiving well according to the plan, arranging the tunneling machine, the jacking equipment and the pipeline 1 for replacing the filler in the working well, after the preparation is complete, excavating the roadbed, jacking the pipeline 1 for replacing the filler into the roadbed along with the tunneling machine until the pipeline 1 for replacing the filler penetrates through the roadbed, then pouring and reinforcing the space between the pipeline 1 for replacing the filler and the filler of the roadbed, packaging two ends of the pipeline 1 for replacing the filler and restoring the pavement.
The beneficial effects of the above technical scheme are that: the settlement of the filler in the roadbed can be effectively reduced by utilizing the good bearing performance and the deformation capacity of the pipeline 1 for replacing the filler, and meanwhile, the bridge transition section replaces part of the filler in the roadbed through the pipeline 1 for replacing the filler, so that the self weight of the filler can be effectively reduced, the load on the roadbed is reduced, the settlement of the roadbed is further reduced, the method does not need to completely dig the road surface for the landfill work of the pipeline 1 for replacing the filler, the method can be carried out under the condition of not interrupting traffic, and other problems caused by the fact that the roadbed is dug can be avoided.
In one embodiment, step S1 further includes the following steps:
s101: measuring the positions of a working well and a receiving well and the position and the trend of the pipeline 1 for replacing the filler according to the on-site plane arrangement and the spatial position of the transition section of the bridge and the road of the existing bridge;
s102: and setting a temporary level point, and measuring and setting the excavation range and depth of the working well and the receiving well.
The working principle and the beneficial effects of the technical scheme are as follows: when the measurement lofting is carried out, firstly, the plane layout and the space position of the existing bridge and road transition section on site are measured and calculated, the lofting planning is carried out on the positions of a working well and a receiving well, meanwhile, the position, the length and the trend of a pipeline 1 for replacing fillers are planned, then a temporary leveling point is set, the excavation range and the depth of the working well and the receiving well are calculated according to the environment, the soil property and the geology of the site, and therefore the working well and the receiving well can be immediately supported and prevented from collapse according to the soil property and the geology in the subsequent construction.
In one embodiment, step S2 further includes the following steps:
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.
The step S3 further includes the following steps:
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.
The working principle and the beneficial effects of the technical scheme are as follows: the working well and the receiving well are excavated according to the lofting and planning range, meanwhile, a soil body 9 of the side wall is supported through a supporting steel plate 8, casualties and equipment damage caused by collapse in the excavating process are avoided, when the working well is excavated to the designed elevation, a bottom plate and a wall plate are poured by concrete, collapse is avoided, because related equipment needs to be erected in the working well, a steel plate cushion block needs to be laid at the bottom, the thickness of the steel plate cushion block can meet the requirement of the equipment, the receiving well is only used for receiving the equipment, and the pouring strength and stability can meet the requirements of related geological conditions and field conditions.
In one embodiment, step S4 further includes the following steps:
s401: arranging a pipe jacking machine guide rail and a hydraulic jack in the working well;
s402: a heading machine is installed at the foremost end of the pipeline 1 for replacing the filler, and the heading speed and the jacking speed are selected and set according to the filling property, the thickness of the covering layer and the like.
The working principle and the beneficial effects of the technical scheme are as follows: when the preparation work is carried out, a pipe jacking machine guide rail and a hydraulic jack are required to be installed in a working well in advance, then the front end of the first section of pipeline 1 for replacing the filler is installed on the tunneling machine, and the tunneling speed and the jacking speed are measured and calculated according to the filling property, the thickness of the covering layer and the like.
In one embodiment, step S5 further includes 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; 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;
s502: during the tunneling process, the excavated 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 1 for replacing the filler 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 1 is jacked, and the process is repeated until the development machine passes through the roadbed from the working well to the receiving well, and the development machine is hoisted and recovered;
s504: meanwhile, the 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 pipeline 1 for replacing the filler in the first section needs to be pushed out to the receiving well for a certain length from the roadbed, the whole jacking construction is finished, and the pipeline 1 for replacing the filler is completely penetrated.
The working principle and the beneficial effects of the technical scheme are as follows: the pipeline 1 for replacing the filler penetrating through the roadbed is formed by connecting a plurality of pipelines 1 which are used for replacing the filler in pairs, so that the pipeline 1 for replacing the filler is not limited by the total length, the area of a working well can be reduced as much as possible, thereby reducing the occupation of nearby roads or fields, avoiding the collapse of the bridge body caused by overlarge tunneling force during tunneling, ensuring that the jacking speed is not too high, when the heading machine is completely inserted into the roadbed of the bridge body, the jacking speed can be properly increased, and when the heading machine is taken out from the receiving well, it is necessary to continue jacking the tube 1 of replacement packing until a portion of the first section of tube 1 of replacement packing extends into the receiving well, therefore, the pipeline 1 for replacing the filler can ensure that the roadbed is completely penetrated, and the phenomenon that the roadbed collapses due to lack of support or uneven stress caused by the fact that the pipeline 1 for replacing the filler does not completely penetrate the roadbed is avoided.
In one embodiment, step S6 further includes 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: and finally, plugging the port of the pipeline 1 for replacing the filler to restore the pavement.
The working principle and the beneficial effects of the technical scheme are as follows: 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 that the coupling between the pipeline 1 for replacing the filler and the filler can be increased, the pipeline 1 for replacing the filler is prevented from displacing, meanwhile, the stress can be more uniform by connecting the grouting and the filler into a whole, and finally, the port of the pipeline 1 for replacing the filler is closed and the pavement is recovered.
In one embodiment, the filler-substituted pipe 1 is a corrugated steel 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 so as 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 length of each section of corrugated steel pipe is set according to specific conditions and can be generally set to be 2-3 m.
The working principle and the beneficial effects of the technical scheme are as follows: the pipeline 1 replacing the filler adopts a corrugated steel pipe, and the corrugated steel pipe is thin, so that the reinforced steel pipe 12 is required to be arranged in the corrugated steel pipe to improve the axial rigidity of the corrugated steel pipe in the jacking process so as to avoid the corrugated steel pipe from cracking in the jacking process, the reinforced steel pipe 12 is removed after the corrugated steel pipe is communicated, the corrugated steel pipe has better bearing performance and deformation capacity, the acting force of an automobile on a roadbed can be applied to the effect of dispersing stress through the radial deformation of the corrugated steel pipe when the automobile passes through the transition section, and the corrugated steel pipe disperses the axial stress through the extrusion deformation between wave crests and wave troughs when a plurality of automobiles pass through the transition section, so that the settlement of a foundation is reduced, and the quality of the filler is also reduced.
In one embodiment, the corrugated steel pipes are connected by a connecting piece 13,
a plurality of claw buckles 14 are arranged at the end part of the corrugated steel pipe, the claw buckles 14 protrude outwards along the radial direction of the corrugated steel pipe, a plurality of claw buckles 14 form ring buckles which are 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 ring 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 is including the shell fragment that has initial and tensile two kinds of states, be provided with grafting dop 18 and jacking dop 19 on the outer wall of body 15, grafting dop 18 with the one end of body 15 forms and inserts end 20, jacking dop 19 sets up the other end of body 15, grafting dop 18 with form pressfitting chamber 21 between the jacking dop 19, two corrugated steel pipes of pegging graft each other the equal joint of latch closure is in pressfitting chamber 21 and compression deformation, insert end 20 and insert earlier jacking the end of corrugated steel pipe, and the tip of body 15 with strengthen steel pipe 12 butt, later jacking in the corrugated steel pipe strengthen steel pipe 12 with jacking dop 19 butt.
The working principle of the technical scheme is as follows: when two corrugated steel pipes are connected, the inserting end 20 of the connecting piece 13 is inserted into the previous corrugated steel pipe, at this time, the buckle of the previous corrugated steel pipe is clamped with the pipe body 15 through the inserting chuck 18, because the claw buckle 14 is provided with the bulge and the buckle is matched with the wave crest of the corrugated steel pipe, the outer wall of the inserting chuck 18 is clamped on the inner wall of the buckle, then the buckle of the next corrugated steel pipe is clamped through the jacking chuck 19, at this time, the buckles of the two corrugated steel pipes are both positioned in the pressing cavity 21, under the action of the hydraulic jack, the reinforced steel pipe 12 in the next corrugated steel pipe is abutted against the jacking chuck 19, the pipe body 15 is pushed by pushing the jacking chuck 19 to push the inserting end 20 to be deeper into the previous corrugated steel pipe, and the end of the pipe body 15 at the inserting end 20 is abutted against the tail end of the reinforced steel pipe 12 in the previous corrugated steel pipe to push the previous corrugated steel pipe to move, when the connecting piece 13 moves into a tunnel excavated by the heading machine, the inner wall of the tunnel extrudes and deforms the claw buckle 14 protruding from the pressing cavity 21, so that the ring buckles of the two steel corrugated pipes are fixed in the pressing cavity 21 due to extrusion and deformation, and the two steel corrugated pipes are connected.
The beneficial effects of the above technical scheme are that: through the design of the structure, the reinforcing steel pipe 12 in the prior corrugated steel pipe is extruded and jacked by the hydraulic jack, so that the reinforcing steel pipe is perfectly attached to the inner wall of the corrugated steel pipe and is not easy to deform, the reinforcing steel pipe can be pushed only by the end part of the pipe body 15, the reinforcing steel pipe 12 in the subsequent corrugated steel pipe cannot ensure that all end surfaces are flush and all the reinforcing steel pipes 12 are in a position parallel to the central axis of the corrugated steel pipe when being installed, so that the reinforcing steel pipe and the subsequent corrugated steel pipe move relatively when being extruded and jacked, the front end of the reinforcing steel pipe 12 in the subsequent corrugated steel pipe is required to have a large enough contact area to prevent the reinforcing steel pipe and the connecting piece 13 from being separated, the laminating cavity 21 can fully fill the laminating cavity 21 through deformation under the extrusion of a tunnel by utilizing the property of the ring fastener, so as to realize the connection of the two corrugated steel pipes, when a vehicle runs on the road surface, the car can be to the packing production pressure in the roadbed, pressure is through leading to reach corrugated steel pipe can be through its self annular and crest, the trough will radial and axial stress divergence, connecting piece 13 then can transmit the stress that receives to damping tube 16 on via reed 17, the swing through damping tube 16 is dispersed the stress that receives, thereby make connecting piece 13 also can disperse and then increase connecting piece 13's life to the stress that receives, avoid long-time repeated atress appearance fatigue damage's the condition.
In one embodiment, when the pipeline 1 for replacing the filler is selected, the maximum radial bending strain value δ of the filler on the pipe wall of the pipeline 1 for replacing the filler is measured according to the geographical environment of the transition section, and then the diameter R of the pipeline 1 for replacing the filler is calculated by the following formula
R＝±(C/δ)((3ΔY/R)/1-(2ΔY/R))
Wherein R is the diameter of the tube 1 in place of the packing; c is the thickness of the tube 1 in place of the filler; delta is the maximum strain value of the pipe wall due to radial bending; delta Y is the radial reduction of the pipe diameter of the pipeline 1 for replacing the filler;
the corresponding thickness can be calculated according to the required diameter or calculated through the required thickness by the formula.
The working principle and the beneficial effects of the technical scheme are as follows: the corresponding diameter or thickness can be selected according to the construction requirement through the formula, so that the pipeline 1 replacing the filler can have a sufficient radial bending strain value, and the phenomenon that the pipeline 1 replacing the filler cannot bear the weight of the filler in the foundation and collapse due to the fact that the requirement of the strain value cannot be met by selecting the thickness and the diameter is avoided.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A method for reinforcing the transition section of the bridge and the road of the existing 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: and (6) reinforcing.
2. The method for reinforcing the transition section of an existing bridge and road bridge without interrupting traffic of 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 level point, and measuring and setting the excavation range and depth of the working well and the receiving well.
3. The method for reinforcing the transition section of an existing bridge and road bridge without interrupting traffic 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 the transition section of an existing bridge and road bridge without interrupting traffic of 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 an existing bridge and road bridge without interrupting traffic 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: a heading machine is arranged at the most front end of the pipeline (1) for replacing the filler, and the heading speed and the jacking speed are selected and set according to the filling property, the thickness of the covering layer and the like.
6. The method for reinforcing the transition section of an existing bridge and road bridge without interrupting traffic of claim 1, wherein the step S5 further comprises the steps of:
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 excavated 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, the 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 to the receiving well for a certain length from the roadbed, the whole jacking construction is finished, and the pipeline (1) for replacing the filler is completely communicated.
7. The method for reinforcing the transition section of an existing bridge and road bridge without interrupting traffic of claim 1, wherein the step S6 further comprises the steps of:
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: and finally, plugging the port of the pipeline (1) for replacing the filler to restore the pavement.
8. The method for reinforcing the transition section of an existing bridge and road bridge without interrupting traffic of claim 6, 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.
9. The method for strengthening the transition section of an existing bridge and road bridge without interrupting traffic according to any one of claims 1 to 8, wherein the filler-substituted pipe (1) is a corrugated steel 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 length of each section of corrugated steel pipe is set according to specific conditions and can be generally set to be 2-3 m.
10. The method for strengthening the transition section of an existing bridge and road bridge without interrupting traffic according to claim 9, wherein said corrugated steel pipes are connected by a connecting member (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 an initial state and a stretching state, the outer wall of the pipe body (15) is provided with a plug-in chuck (18) and a jacking chuck (19), an insertion end (20) is formed by the plug-in chuck (18) and one end of the pipe body (15), the jacking chuck (19) is arranged at the other end of the pipe body (15), a pressing cavity (21) is formed between the splicing chuck (18) and the jacking chuck (19), the buckles of the two corrugated steel pipes which are mutually spliced are clamped in the pressing cavity (21) and are compressed and deformed, the insertion end (20) is inserted into the tail end of the corrugated steel pipe which is advanced in advance, and the end of the pipe body (15) is abutted against the reinforced steel pipe (12), the reinforced steel pipe (12) in the steel corrugated pipe which is pushed back is abutted against the pushing chuck (19).
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