CN112813852B

CN112813852B - Repairing and reinforcing method for bridge deck subsidence of in-service bridge

Info

Publication number: CN112813852B
Application number: CN202110008531.5A
Authority: CN
Inventors: 李海涛; 宋恒扬; 李本伟; 徐洪彬; 周兴强; 张亚平; 冮大兴; 崔琨; 宋开辉
Original assignee: Sichuan Highway Planning Survey and Design Institute Ltd
Current assignee: Sichuan Highway Planning Survey and Design Institute Ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2022-09-09
Anticipated expiration: 2041-01-05
Also published as: CN112813852A

Abstract

The invention discloses a method for repairing and reinforcing bridge deck subsidence of an in-service bridge, which is particularly suitable for the condition that the bridge deck subsides due to slippage, dislocation and sinking of an upper beam body caused by the inclination of a pier stud, and the method comprises the following steps: building a support bent group; the supporting bent frame group is provided with a jacking jack group for jacking the beam body upwards; the pushing reset device is arranged to push and reset the beam body by using the bent cap; correspondingly mounting a leveling device on the support bent frame group for adaptive leveling support; repairing and reinforcing the damaged bridge pier. The reinforcing method of the invention considers the strong connection between the upper structure and the lower structure of the bridge, firstly carries out deviation rectification and resetting and corresponding leveling on the upper structure and the lower structure of the bridge, and then carries out repair and reinforcement treatment on pier columns at the lower part of the bridge, thereby not only treating the symptoms and root causes, but also repairing the slip tendency, greatly reducing the potential safety hazard, and avoiding the adverse effect on the upper structure of the existing bridge when the reinforcement treatment is carried out on the bridge piers with diseases.

Description

Repairing and reinforcing method for bridge deck subsidence of in-service bridge

Technical Field

The invention relates to the technical field of bridge maintenance and reinforcement, in particular to a method for repairing and reinforcing in-service bridge deck subsidence.

Background

In recent years, with the rapid construction of the traffic in China, some large-span bridges are also produced in order to adapt to the ditches and the gorges and span the large rivers and the large rivers. Based on complex geological conditions, the span and structural form of the bridges exceed the applicable conditions of the existing specifications, after the bridges are constructed, the longitudinal direction and/or the transverse direction of the bridges have slopes, for example, the west climbing K2417+890 paddy bay bridge located at the position of about 1.8 kilometers of the direction outlet of the climbing flowers of the west climbing acidic water bay tunnel is a large bridge with 4% of longitudinal slopes in the longitudinal direction and 2% of slopes in the transverse direction, although the full bridge plane is in a straight line section, the dangerous situations such as inclined breakage of pier columns at the lower part, slippage of bridges at the upper part and the like can occur under the long-term superposition of adverse factors such as earthquake action, heavy-load braking force and the like, so that pile bodies and beam bodies are damaged, and huge potential safety hazards exist. At this time, the offset bridge body needs to be restored and reinforced to treat the bridge pier with the damage.

The prior art provides a method for reinforcing a bridge pier in the existing operation (the patent application number is CN201710317000.8), a spinning full-casing bored pile is adopted to carry out pile foundation to replace an old pile foundation, and a new bearing platform is arranged to be connected with a pier body into a whole and stressed together, so that the reinforcement is realized. However, this strengthening method is inefficient and has a long construction period, and some bridges are on a transportation line and cannot be broken for a long time, so that in order to make a road quickly pass through, the prior art provides a method and a device for quickly strengthening and strengthening a damaged single-column pier (patent application No. CN201810583434.7), in which a rigid framework is wrapped at the receiving position of a pier column and a pile foundation, an auxiliary steel pipe pile is inserted into the soil layer through the rigid framework, the auxiliary steel pipe pile is inserted into a predetermined depth, the auxiliary steel pipe pile is pressed against, and the rigid framework and the auxiliary steel pipe pile are locked by a locking device, so as to quickly strengthen the pier column and the pile foundation, however, this method is only suitable for temporary strengthening, and it is expected that the strengthening and repairing of a lower pier column first can lead to the fixing of a lower form, and further the repairing of an upper bridge can only adopt a mode of continuous connection in a deviated hole, construction obstacles exist, the structural strength is difficult to guarantee, and the original foundation and reinforcing measures must be broken again for subsequent complete repair. Therefore, the two methods only carry out repair and reinforcement on the bridge substructure, do not consider strong connection between the bridge superstructure and the substructure, and do not consider the support problem that the bridge has slopes in the longitudinal direction and/or the transverse direction, so that the temporary solution is not treated, and the reinforced bridge structure still has slip tendency and potential safety hazard.

Disclosure of Invention

Therefore, in order to solve the above problems, it is necessary to provide a method for repairing and reinforcing a bridge deck depression of an in-service bridge, which can avoid adverse effects on an existing bridge structure when restoration, reinforcement and treatment are performed on a bridge pier with a damaged bridge deck.

The invention is realized by the following technical scheme:

the utility model provides a restoration reinforcement method of bridge floor subsidence in labour bridge, bridge in labour including wait to restore the pier stud, in the integrative bent cap that sets up in the capital of waiting to restore the pier stud and overlap joint first roof beam body and the second roof beam body in the bent cap top, the bent cap has back of the body wall, first roof beam body locates back of the body wall one side, the second roof beam body locates back of the body wall top surface, restoration reinforcement method includes the following step at least:

s1, constructing support bent frame groups corresponding to the first beam body and the second beam body on two sides of the pier column to be repaired along the longitudinal bridge direction of the bridge, wherein each support bent frame group comprises a support bent frame and a cross beam arranged at the top end of the support bent frame;

s2, installing a jacking jack group between the cross beam and the beam body where the cross beam is located, and respectively jacking the first beam body and the second beam body to the bridge deck of the first beam body and the bridge deck of the second beam body to be flush through the jacking jack group;

s3, arranging a pushing reset device at the position of the bent cap, and performing pushing reset operation on the first beam body and the second beam body through the pushing reset device to enable the first beam body, the second beam body and the bent cap to be corrected and reset;

s4, measuring the distance between the cross beam and the beam body in which the cross beam is located in a sectional manner along the transverse bridge direction of the bridge, and designing a plurality of groups of leveling devices with corresponding heights according to the distance;

s5, correspondingly installing leveling devices between the cross beam and the beam body where the cross beam is located, and carrying out leveling supporting operation on the first beam body and the second beam body through the leveling devices to enable the cross beam to be adaptively connected with the beam body where the cross beam is located;

and S6, chiseling the damaged part of the pier column to be repaired, grouting for repair, cleaning, chiseling, planting ribs and erecting a mold of the pier column to be repaired, and pouring concrete to form reinforcement.

In one embodiment, before step S1, the method further includes: the transverse partition plate and the back wall of the first beam body are connected in a penetrating mode through the connecting rod, and fasteners are arranged at two ends of the connecting rod to limit and fix the transverse partition plate and the back wall.

In one embodiment, before step S2, the method further includes: set up at first roof beam body and back wall and prevent sudden change jack, its direction of action both ends respectively with first roof beam body and back wall butt, shorten the stroke of preventing sudden change jack in step or shorten the stroke of preventing sudden change jack slowly after the jacking is ended in order to slowly unload the power.

In one embodiment, the pushing and resetting device comprises a reaction plate and a pushing jack, and the pushing and resetting operation comprises the following steps:

s31, penetrating the first end of the connecting rod through the diaphragm plate of the first beam body, and arranging a fastener for limiting and fixing;

s32, arranging a reaction plate at the second end of the connecting rod in a penetrating manner, and arranging a fastener for limiting and fixing;

and S33, arranging a pushing jack between the reaction plate and the back wall, wherein two ends in the acting direction of the pushing jack are respectively abutted against the reaction plate and the back wall, and pushing by the pushing jack to enable the first beam body and the cover beam to be mutually drawn together and reset.

In one embodiment, the pushing and resetting device further comprises a force transmission seat, wherein the force transmission seat is arranged between the first beam body and the second beam body and is respectively abutted against the beam end of the first beam body and the beam end of the second beam body.

In one embodiment, the leveling device comprises a leveling steel box, a support and a wedge plate, and the leveling support operation comprises the following steps:

s51, hoisting the leveling steel boxes to the top end of the support bent frame group, and installing the leveling steel boxes with corresponding heights above the cross beam corresponding to the distance between the cross beam and the beam body where the cross beam is located, so that the distance between each leveling steel box and the beam body where the leveling steel box is located is equal;

s52, stacking the support and the wedge-shaped plate above the leveling steel box in a mode that the support is arranged below the wedge-shaped plate and the wedge-shaped plate is arranged above the leveling steel box, sealing the wedge-shaped plate and the beam body, reserving a grouting port and a grout outlet at the sealing position, and filling epoxy mortar between the wedge-shaped plate and the beam body through the grouting port to ensure that the wedge-shaped plate and the beam body are full and have no cavity.

In one embodiment, the hoisting mode of the leveling steel box is as follows:

s511, building a passing platform towards the cross beam side along the bridge cross bridge, wherein the passing platform is provided with a transverse moving rail parallel to the cross beam, one end of the transverse moving rail exceeds the transverse side of the in-service bridge, and the other end of the transverse moving rail is flush with the transverse side of the in-service bridge or exceeds the transverse side of the in-service bridge;

s512, arranging a horizontal pushing trolley capable of moving along the transverse moving rail on the transverse moving rail, wherein the horizontal pushing trolley is slightly higher than the cross beam in height, hanging the leveling steel box on the horizontal pushing trolley, transversely moving the horizontal pushing trolley to an installation position, and longitudinally and manually positioning the leveling steel box on the cross beam by using a chain block in a matching manner to complete accurate installation.

In one embodiment, the support bent group is constructed in the following manner: correspondingly constructing bearing platforms on two sides of the pier stud to be repaired along the longitudinal bridge direction of the bridge, and fixedly connecting a support bent frame on the bearing platforms, wherein the support bent frame comprises a plurality of steel pipe columns which are distributed along the transverse bridge direction of the bridge, and the adjacent steel pipe columns are connected and supported through a plurality of support rods; and then hoisting the cross beam to the top of the support bent frame and fixedly connecting the cross beam with the top of the support bent frame.

In one embodiment, the steel pipe columns of the two support bent frames are distributed in a one-to-one correspondence mode, and the steel pipe columns corresponding to the two support bent frames are connected and supported through a plurality of support rods in a zigzag end-to-end connection mode.

In one embodiment, the bottom end and the top end of the steel pipe column are respectively provided with a first flange plate and a second flange plate, a bearing platform is correspondingly embedded with a bearing platform flange, and the steel pipe column is connected with the bearing platform flange through the first flange plate; the steel pipe column is connected with the cross beam through a second flange plate.

Compared with the prior art, the technical scheme of the invention at least has the following advantages and beneficial effects:

in consideration of strong connection between the upper part structure and the lower part structure of the bridge, the upper part structure of the bridge is supported and transferred, the upper part structure and the lower part structure of the bridge are subjected to deviation rectifying and resetting and are correspondingly leveled, and then the lower part pier stud of the bridge is subjected to repairing and reinforcing treatment, so that the invention not only treats the symptoms and root causes, but also repairs the slippage tendency, greatly reduces the potential safety hazard, and can avoid the adverse effect on the upper part structure of the existing bridge when the damaged pier is recovered and reinforced and treated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an application scenario diagram of the repair reinforcement method provided in an embodiment of the present invention;

FIG. 2 is a schematic side structure diagram of the method for repairing and reinforcing provided by the embodiment of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is an enlarged schematic view at B of FIG. 2;

FIG. 5 is a schematic diagram of the process at C of FIG. 2;

fig. 6 is a schematic elevation structure diagram after the leveling and supporting operation is performed on the second beam side according to the embodiment of the present invention.

Icon: 11-pier column to be repaired, 12-capping beam, 121-back wall, 13-first beam body, 131-diaphragm plate, 14-second beam body, 2-support bent frame group, 21-bearing platform, 211-bearing platform flange, 22-support bent frame, 221-steel pipe column, 222-supporting rod, 223-first flange plate, 224-second flange plate, 23-cross beam, 3-jacking jack group, 31-anti-mutation jack, 4-jacking reset device, 41-connecting rod, 411-first end, 412-second end, 42-fastener, 43-reaction plate, 44-jacking jack, 45-force transmission seat, 5-leveling device, 51-leveling steel box, 52-support, 53-wedge plate, 6-passing platform, 61-transverse moving track, 62-horizontal pushing trolley.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, a method for repairing and reinforcing a bridge deck depression of an in-service bridge will be described more clearly and completely with reference to the drawings in the embodiments of the present invention. The preferred embodiments of the repair and reinforcement method for in-service bridge deck sinkage are shown in the drawings, however, the repair and reinforcement method for in-service bridge deck sinkage may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete in the context of a repair reinforcement method for in-service bridge deck settlement.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, when used in reference to an orientation or positional relationship indicated in the drawings, or as otherwise customary for use in the practice of the invention, are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

In the description of the present invention, it should be further noted that the terms "disposed," "mounted," "connected," and "connected" used herein should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

As shown in fig. 1, when a bridge has a slope, the difference in slope is usually adjusted by using upper beam structures with different heights at the position of the connecting pier, and then the capping beam 12 with the back wall 121 is used for joint bearing, so that the in-service bridge comprises the pier stud 11 to be repaired, the capping beam 12 integrally arranged at the top of the pier stud 11 to be repaired, and the first beam 13 and the second beam 14 overlapped above the capping beam 12, the capping beam 12 has the back wall 121, the first beam 13 is arranged at one side of the back wall 121, and the second beam 14 is arranged at the top of the back wall 121, therefore, as shown in fig. 1-6, the invention provides a method for repairing and reinforcing the in-service bridge deck sinking, which is used for repairing and reinforcing the in-service bridge structure, and comprises at least the following steps:

s0, as shown in fig. 1, the diaphragm 131 of the first beam 13 is connected to the back wall 121 through the connecting rod 41, and the fastening members 42 are disposed at the opposite outer sides of the two ends of the connecting rod 41 for limiting and fixing, so as to limit the first beam 13 and the back wall 121 from moving back to back. Through setting up connecting rod 41 in advance and concreteing first roof beam body 13 and back wall 121, can avoid taking place risk such as roof beam that falls in the follow-up work progress, still can regard as later stage top to push away the basic instrument that resets simultaneously, practical and easy installation are dismantled to reduce the operation process, the cost is reduced.

Specifically, the through holes formed in the diaphragm plate 131 and the back wall 121 may be oval holes, so that the connecting rod 41 has a certain range of motion in the vertical direction, and thus adaptive height adjustment is performed in subsequent jacking and pushing processes, and bending caused by excessive rigidity of connection is avoided. The connecting rod 41 can be made of a steel bar which is easy to implement, threads are arranged at two ends of the steel bar, the fastening piece 42 can be a nut, a rubber cushion block and a steel plate are arranged between the nut and the transverse partition plate 131 and between the nut and the back wall 121 in a penetrating mode, the acting area of the fastening piece 42 is enlarged through the steel plate, and stress concentration is avoided.

S1, as shown in fig. 2 and fig. 3, constructing a support bent frame set 2 on two sides of the pier 11 to be repaired corresponding to the first beam 13 and the second beam 14 along the longitudinal bridge direction of the bridge.

Specifically, each group of support bent frame groups 2 comprises a support bent frame 22 and a cross beam 23 arranged at the top end of the support bent frame 22, when the support bent frame groups 2 are built, bearing platforms 21 are correspondingly built on two sides of a pier column 11 to be repaired along the longitudinal direction of a bridge, an integral foundation is constructed below the bearing platforms 21 in a steel pipe cast-in-place pile mode, when a foundation platform is difficult to excavate, a step-shaped foundation can be arranged, but the bearing range of the foundation corresponding to each upright steel pipe is not smaller than the minimum size of the bearing platforms 21, a side slope is protected according to the terrain in the foundation excavation process, the slope is prevented from collapsing, cushion concrete is poured in time after the foundation platform is excavated in place, and the foundation soil is prevented from being exposed for a long time; then a plurality of steel pipe columns 221 are fixedly connected to the bearing platform 21, the plurality of steel pipe columns 221 are distributed along the transverse bridge direction of the bridge, adjacent steel pipe columns 221 are connected and supported through a plurality of support rods 222 to form a support bent frame 22, the cross beam 23 is hoisted to the top of the support bent frame 22 to form a support bent frame group 2, the steel pipe columns 221 of the two support bent frame groups 2 are distributed in a one-to-one correspondence mode, and the support rods 222 which are connected end to end in a zigzag mode are connected and supported between the corresponding steel pipe columns 221 to form a stable new support.

In the embodiment, the fixed connection between the bearing platform 21 and the steel pipe column 221 is realized by connecting the first flange 223 and the bearing platform flange 211, the first flange 223 is arranged at the bottom end of the steel pipe column 221, and the bearing platform flange 211 is embedded in the top surface of the bearing platform 21 when the bearing platform 21 is constructed; the steel pipe column 221 is connected with the beam 23 through the second flange 224, and the beam 23 may be directly placed on the plurality of second flanges 224 of the supporting bent frame 22, or may be further fastened and connected by bolts or welding.

In addition, due to the limitation of clearance below the bridge and the limitation of the hoisting height and distance of the crane, the steel pipe column 221 cannot be accurately positioned, and in order to realize the multipoint accurate positioning of the steel pipe column 221, the steel pipe column 221 can be hoisted in a carrying pole beam hoisting mode; for convenient construction, the steel pipe column 221 can be assembled by steel pipes in sections, and comprises a lower section, an upper section and a plurality of middle sections, wherein the sections are fixedly connected with one another in a carbon dioxide arc welding manner; in order to ensure the structural appearance integrity, lifting lugs can be arranged on the inner sides of the lower segment and the middle segment, the lifting lugs are vertically placed in a lifting mode, and then adjacent segments are welded and fixed after being butted; the lifting eyes of the upper section are arranged outside the upper section, since the existing bridge structure existing at the top interferes with the installation position.

S2, as shown in fig. 2 and 5, installing the jacking jack group 3 between the cross beam 23 and the beam body where the cross beam is located, and respectively jacking the first beam body 13 and the second beam body 14 to make the bridge deck of the first beam body 13 and the bridge deck of the second beam body 14 flush (for example, making the expansion joint between the two beam bodies flush).

It is understood that the cross beam 23 and the beam on which it is located refer to the cross beam 23 supporting the bent frame group 2 and the corresponding first beam 13 or second beam 14 on the side of the cross beam 23 (the term "cross beam 23 and the beam on which it is located" is subsequently referred to, and is also referred to in this sense as the arrangement mode with respect to the leveling device 5), i.e. on the side of the first beam 13, the set of jacking jacks 3 is correspondingly arranged between the first beam 13 and the cross beam 23 supporting the bent frame group 2 on the side of the first beam 13, and likewise on the side of the second beam 14, the set of jacking jacks 3 is correspondingly arranged between the second beam 14 and the cross beam supporting the bent frame group 2 on the side of the second beam 14. Because the bridge width is great, need lay a plurality of jacking jacks at homonymy crossbeam 23 and carry out synchronous jacking to avoid the application of force inequality to cause the destruction to the roof beam body. Taking the first beam body 13 as a T-beam and the second beam body 14 as a hollow slab beam as an example, a jacking jack can be respectively arranged at the longitudinal mileage of each horseshoe at the first beam body 13, a jacking jack can be respectively arranged at the mileage of each rabbet at the second beam body 14, and the load transfer and the initial flush homing can be realized by synchronously pushing upwards.

In addition, as shown in fig. 1, since the gravity of the beam body is gradually transferred to the support bent frame group 2 in stages during the jacking process and slowly rises, at this time, the pier 11 to be repaired and the cap beam 12 thereof are automatically restored to a part in the opposite direction to the offset direction, and may have a sudden nature, in order to prevent the pier 11 to be repaired and the cap beam 12 thereof from suddenly rebounding, before step S2, the first beam body 13 and the back wall 121 may be provided with the anti-collision jacks 31, both ends of which in the acting direction abut against the first beam body 13 and the back wall 121, respectively, so that the stroke of the anti-collision jacks 31 is synchronously shortened during the jacking process or the stroke of the anti-collision jacks 31 is slowly shortened after the jacking process is completed to slowly release the force, and the anti-collision jacks 31 can be removed after the jacking process is completed.

S3, as shown in fig. 1, 2 and 4, a pushing and resetting device 4 is disposed at the capping beam 12, and the pushing and resetting device 4 performs pushing and resetting operations on the first beam 13 and the second beam 14, so as to correct the positions of the first beam 13, the second beam 14 and the capping beam 12. Similarly, because the width of the bridge is large, a plurality of pushing and resetting devices 4 need to be arranged on the same side of the bent cap 12 for synchronous pushing, so as to avoid damage to the beam body caused by uneven force application.

Specifically, the pushing resetting device 4 includes a reaction plate 43 and a pushing jack 44, and the pushing resetting operation includes:

s31, the first end 411 of the connecting rod 41 penetrates through the diaphragm 131 of the first beam body 13, and a fastener 42 is arranged at the first end 411 for limiting and fixing, so as to limit the displacement of the first beam body 13 in the direction away from the back wall 121;

s32, arranging the reaction plate 43 at the second end 412 of the connecting rod 41 in a penetrating manner, arranging a fastener 42 for limiting and fixing, and limiting the displacement of the reaction plate 43 in the direction away from the back wall 121;

s33, the pushing jack 44 is disposed between the reaction plate 43 and the back wall 121, and both ends of the pushing jack in the acting direction are respectively abutted against the reaction plate 43 and the back wall 121, at this time, the pushing jack 44 disposed between the reaction plate 43 and the back wall 121 pushes the back wall 121 and the reaction plate 43 in reverse direction, the reverse thrust force applied to the reaction plate 43 is transmitted from the second end 412 of the connecting rod 41 to the first end 411 of the connecting rod 41, and then transmitted to the diaphragm plate 131 through the fastener 42 at the first end 411, so that the first beam 13 on which the diaphragm plate 131 is disposed and the back wall 121 are pressed against each other to correct the inclined pier stud 11 to be repaired, thereby achieving the deviation-correcting and resetting of the first beam 13 and the back wall 121.

In addition, it can be understood that when the pier stud is inclined, the two beams (the first beam 13 or the second beam 14) can slide in the same direction along the longitudinal direction of the bridge, so that the two beams are dislocated with the bridge cap 12 at the same time, therefore, as shown in fig. 2, the pushing and resetting device 4 further comprises a force transmission seat 45, the force transmission seat 45 is arranged between the first beam 13 and the second beam 14 and is respectively abutted against the beam end of the first beam 13 and the beam end of the second beam 14, and when the deviation rectification and resetting is performed on the first beam 13, the force can be transmitted to the second beam 14 through the force transmission seat 45 in a coordinated manner, so that the synchronous deviation rectification and resetting of the first beam 13 and the second beam 14 is realized. Similarly, because the width of the bridge is large, a plurality of force transmission seats 45 need to be arranged in the expansion joint between the first beam body 13 and the second beam body 14 along the transverse direction of the bridge for synchronous pushing, so as to avoid the damage to the beam bodies caused by uneven force application.

S4, as shown in FIGS. 2, 5 and 6, measuring the distance between the cross beam 23 and the beam body (the first beam body 13 or the second beam body 14) in the cross bridge direction in a subsection manner, and designing a plurality of groups of leveling devices 5 with corresponding heights according to the distance to adapt to the transverse gradient of the bridge; the leveling device 5 comprises leveling steel boxes 51, supports 52 and wedge-shaped plates 53, the corresponding height of the leveling device 5 is set, the height design is mainly carried out on each leveling steel box 51, the height of each support 52 and the height of each wedge-shaped plate 53 are respectively unified, so that each leveling steel box 51 can have the same distance with a beam body after being correspondingly installed, and the leveling steel boxes and the wedge-shaped plates 53 are manufactured in a standard installation mode. In addition, since each leveling steel tank 51 has a different height, it can be marked by a serial number for installation.

S5, as shown in fig. 2, 5 and 6, a leveling device 5 is correspondingly installed between the cross beam 23 and the beam body (the first beam body 13 or the second beam body 14) where the cross beam is located, and the leveling device 5 performs leveling support operation on the first beam body 13 and the second beam body 14, so that the cross beam 23 and the beam body where the cross beam is located are connected adaptively.

Specifically, the leveling support operation includes:

s51, hoisting the leveling steel boxes 51 to the top end of the support bent frame group 2, and installing the leveling steel boxes 51 with corresponding heights above the cross beam 23 corresponding to the distance between the cross beam 23 and the beam body where the cross beam 23 is located, so that the distance between each leveling steel box 51 and the beam body where the leveling steel box is located is equal;

more specifically, since the leveling steel boxes 51 are main load-bearing structures, are direct supporting platforms of the supporting seats 52, and are also tools for adjusting the cross slope of the bridge deck, the weight of the leveling steel boxes 51 is heavy due to the requirement of high structural strength, the weight of a single leveling steel box 51 can reach 300kg, and it is extremely difficult to manually carry and place the leveling steel boxes 51 weighing about 300kg, while in the embodiment, the space between the beam (the first beam 13 or the second beam 14) and the beam 23 (the corresponding beam 23 on the first beam 13 side or the corresponding beam 23 on the second beam 14 side) is relatively large, and the crane cannot be put in place, so that the leveling steel boxes 51 can be hoisted in the following manner:

s511, a passing platform 6 is built on one side of the cross beam 23, which is arranged towards the second beam body 14 side along the bridge cross bridge, the passing platform 6 is provided with a transverse rail 61 which is parallel to the cross beam 23, one end of the transverse rail 61 exceeds the transverse side of the in-service bridge, and the other end of the transverse rail 61 is flush with the transverse side of the in-service bridge or exceeds the transverse side of the in-service bridge;

s512, arranging a horizontal pushing trolley 62 capable of moving along the transverse moving rail 61 on the transverse moving rail 61, wherein the height of the horizontal pushing trolley 62 is slightly higher than that of the cross beam 23, hanging the leveling steel box 51 on the horizontal pushing trolley 62, transversely moving the horizontal pushing trolley 62 to an installation position, and longitudinally and manually positioning the leveling steel box 51 on the cross beam 23 by using a chain hoist to match with a manual work to finish accurate installation;

s52, stacking the support 52 and the wedge-shaped plate 53 above the leveling steel box 51 in a mode that the support 52 is arranged below and the wedge-shaped plate 53 is arranged above, sealing between the wedge-shaped plate 53 and the second beam body 14, reserving a grouting port and a grout outlet at the sealing position, and filling epoxy mortar between the wedge-shaped plate 53 and the beam body through the grouting port to ensure that the wedge-shaped plate 53 and the beam body are full and have no cavity.

Specifically, the wedge-shaped plate 53 has an inclination angle designed corresponding to the longitudinal gradient of the bridge, when the wedge-shaped plate 53 is correspondingly embedded between the support 52 and the second beam 14, the upper end surface of the wedge-shaped plate 53 is fitted with the lower end surface of the second beam 14, then the gap between the wedge-shaped plate 53 and the second beam 14 is sealed by welding, caulking and the like on the upper end surface of the wedge-shaped plate 53, and a grouting port and a grout outlet are reserved at the highest point of the wedge-shaped plate 53 to inject epoxy mortar to fill the gap between the beam bottom of the second beam 14 and the wedge, so that no void is left between the beam bottom of the second beam 14 and the wedge, the epoxy mortar has strong compression resistance, shock resistance, high wear resistance and high weather resistance after being solidified, and the epoxy mortar reaches the expected strength after being solidified, so that the second beam 14 can be adaptively supported. In addition, the support 52 should be replaced correspondingly at the position of the capping beam 12, and leveling is performed through the wedge-shaped plate 53 in the above manner, so that the capping beam 12 is adaptively connected with the beam body where the capping beam is located.

For convenience of illustration, the above-mentioned method is described as an example of the arrangement of the leveling device 5 at the cross beam 23 on the second beam 14 side, and it is understood that the arrangement of the leveling device 5 at the cross beam 23 on the first beam 13 side can also be performed in the above-mentioned manner.

And S6, chiseling the damaged part of the pier column 11 to be repaired, grouting and repairing, cleaning, chiseling, planting bars and erecting a mold of the pier column 11 to be repaired, wherein the template can adopt a steel casing as a permanent reinforcement measure, and pouring concrete to form reinforcement. The reinforced concrete is externally provided with the steel casing to reinforce the pier stud, so that the rigidity of the original pier stud is improved, and after the strength meets the requirement, the fasteners 42 at the two ends of the connecting rod 41 are unscrewed according to the situation, and the T beam is kept to stretch freely.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for repairing and reinforcing in-service bridge deck subsidence, wherein the in-service bridge comprises the following steps: pier stud (11), with wait to restore bent cap (12) and first roof beam body (13) and the second roof beam body (14) of overlap joint in the roof beam (12) top that pier stud (11) set up of restoreing, bent cap (12) have back of the body wall (121), first roof beam body (13) are located back of the body wall (121) one side, second roof beam body (14) are located back of the body wall (121) top surface, its characterized in that, restore the reinforcement method and include following step at least:

s0: the diaphragm plate (131) of the first beam body (13) is connected with the back wall (121) in a penetrating way through a connecting rod (41), and fasteners (42) are arranged at two ends of the connecting rod (41) for limiting and fixing;

s1: constructing a support bent frame group (2) on the first beam body (13) and the second beam body (14) corresponding to two sides of the pier stud (11) to be repaired along the longitudinal direction of the bridge, wherein the support bent frame group (2) comprises a support bent frame (22) and a cross beam (23) arranged at the top end of the support bent frame (22);

arranging sudden change prevention jacks (31) on the first beam body (13) and the back wall (121), wherein two ends in the acting direction of the sudden change prevention jacks are respectively abutted against the first beam body (13) and the back wall (121), and the stroke of the sudden change prevention jacks (31) is synchronously shortened in the jacking process or the stroke of the sudden change prevention jacks (31) is slowly shortened after the jacking is finished so as to slowly unload the force;

s2: a jacking jack group (3) is arranged between the cross beam (23) and the beam body where the cross beam is located, and the first beam body (13) and the second beam body (14) are respectively jacked to be flush with the bridge deck of the first beam body (13) and the bridge deck of the second beam body (14) through the jacking jack group (3);

s3: arranging a pushing resetting device (4) at the capping beam (12), and performing pushing resetting operation on the first beam body (13) and the second beam body (14) through the pushing resetting device (4) to correct the deviation and return of the first beam body (13), the second beam body (14) and the capping beam (12); the pushing resetting device (4) comprises a reaction plate (43) and a pushing jack (44), and the pushing resetting operation comprises the following steps:

s31: the first end of the connecting rod (41) penetrates through the diaphragm plate (131) of the first beam body (13), and the fastener (42) is arranged for limiting and fixing;

s32: the reaction plate (43) is arranged at the second end of the connecting rod (41) in a penetrating manner, and the fastening piece (42) is arranged for limiting and fixing;

s33: the pushing jack (44) is arranged between the reaction plate (43) and the back wall (121), two ends in the acting direction of the pushing jack are respectively abutted against the reaction plate (43) and the back wall (121), and the pushing jack (44) is used for pushing so that the first beam body (13) and the cover beam (12) are mutually drawn together and reset;

s4: measuring the distance between the cross beam (23) and a beam body where the cross beam is located in a sectional manner along the transverse bridge direction of the bridge, and designing a plurality of groups of leveling devices (5) with corresponding heights according to the distance;

s5: correspondingly installing the leveling devices (5) between the cross beam (23) and the first beam body (13) where the cross beam is located, and carrying out leveling supporting operation on the first beam body (13) and the second beam body (14) through the leveling devices (5) so as to enable the cross beam (23) to be adaptively connected with the beam body where the cross beam is located;

s6: chiseling the damaged part of the pier stud (11) to be repaired, grouting and repairing, then cleaning, chiseling, planting bars and erecting a mold of the pier stud (11) to be repaired, and pouring concrete to form reinforcement.

2. The method for repairing and reinforcing the bridge deck depression of an in-service bridge according to claim 1, wherein the pushing and resetting device (4) further comprises a force transmission seat (45), and the force transmission seat (45) is arranged between the first beam body (13) and the second beam body (14) and is respectively abutted against the beam end of the first beam body (13) and the beam end of the second beam body (14).

3. The method for repairing and reinforcing the bridge deck depression of an in-service bridge according to claim 1, wherein the levelling means (5) comprise levelling steel boxes (51), supports (52) and wedge plates (53), the levelling support operation comprising:

s51: hoisting the leveling steel box (51) to the top end of the support bent frame group (2) and corresponding to the distance between the cross beam (23) and the beam body where the cross beam is located; the leveling steel boxes (51) with corresponding heights are arranged above the cross beam (23), so that the distances between the leveling steel boxes (51) and the beam body where the leveling steel boxes are located are equal;

s52: will support (52) with wedge plate (53) with support (52) are under, wedge plate (53) are in the mode stack of going up in the top of leveling steel case (51), and be in seal between wedge plate (53) and the roof beam body, reserve grouting opening and grout outlet in sealed department, through the grouting opening to fill epoxy mortar between wedge plate (53) and the roof beam body, guarantee full no cavity between wedge plate (53) and the roof beam body.

4. The method for repairing and reinforcing the settlement of the bridge deck of the in-service bridge according to claim 3, wherein the leveling steel boxes (51) are hoisted in a mode that:

s511, a passing platform (6) is built towards the cross beam (23) side along the bridge cross bridge, the passing platform (6) is provided with a transverse moving rail (61) parallel to the cross beam (23), one end of the transverse moving rail (61) exceeds the transverse side of the in-service bridge, and the other end of the transverse moving rail (61) is flush with the transverse side of the in-service bridge or exceeds the transverse side of the in-service bridge;

s512, a horizontal pushing trolley (62) capable of moving along the transverse moving rail is arranged on the transverse moving rail (61), the horizontal pushing trolley (62) is slightly higher than the cross beam (23), the leveling steel box (51) is hung and placed on the horizontal pushing trolley (62), and after the horizontal pushing trolley (62) is moved to a mounting position transversely, the leveling steel box (51) is vertically placed on the cross beam (23) in position by matching with a chain hoist to finish accurate mounting.

5. The method for repairing and reinforcing a bridge deck depression of an in-service bridge according to any one of claims 1 to 4, wherein the support bent group (2) is constructed in a manner that: correspondingly constructing bearing platforms (21) on two sides of the pier column (11) to be repaired along the longitudinal bridge direction of the bridge, fixedly connecting the support bent frames (22) on the bearing platforms (21), wherein each support bent frame (22) comprises a plurality of steel pipe columns (221), the plurality of steel pipe columns (221) are distributed along the transverse bridge direction of the bridge, and the adjacent steel pipe columns (221) are connected and supported through a plurality of support rods (222); and then hoisting the cross beam (23) to the top of the support bent frame (22) and fixedly connecting.

6. The method for repairing and reinforcing the bridge deck subsidence of an in-service bridge according to claim 5, wherein the steel pipe columns (221) of the two support bent frames (22) are distributed in a one-to-one correspondence manner, and the steel pipe columns (221) corresponding to the two support bent frames (22) are connected and supported through a plurality of support rods (222) which are connected end to end in a zigzag manner.

7. The in-service bridge deck settlement repairing and reinforcing method as claimed in claim 5, wherein a first flange (223) and a second flange (224) are respectively arranged at the bottom end and the top end of the steel pipe column (221), a bearing platform flange (211) is correspondingly embedded in the bearing platform (21), and the steel pipe column (221) is connected with the bearing platform flange (211) through the first flange (223); the steel pipe column (221) is connected with the cross beam (23) through the second flange plate (224).