CN110904829A - Construction method of anti-overturning adjustable support of bridge - Google Patents
Construction method of anti-overturning adjustable support of bridge Download PDFInfo
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- CN110904829A CN110904829A CN201911126202.XA CN201911126202A CN110904829A CN 110904829 A CN110904829 A CN 110904829A CN 201911126202 A CN201911126202 A CN 201911126202A CN 110904829 A CN110904829 A CN 110904829A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/048—Bearings being adjustable once installed; Bearings used in incremental launching
Abstract
The invention relates to a construction method of an anti-overturning adjustable support of a bridge and an adjustable support applied by the same, wherein after a beam bottom screw hole is cleaned and coated with bar planting glue, an upper bolt of the adjustable support is inserted into the screw hole of the beam bottom of the bridge by utilizing movable support lifting equipment to position the adjustable support; the adjustable support is propped by lifting movable support lifting equipment, the support is temporarily supported on a support mounting operation platform by adopting a support frame, and the support lifting equipment is dropped by a forklift after the support is stably supported; implanting steel bar nails into screw holes in the peripheral wall of the pier stud; binding a reinforcing mesh outside the pier stud and fixing the reinforcing mesh and the reinforcing nails together; arranging a steel plate protective layer on the periphery of the steel bar mesh; pouring concrete inside the steel plate protective layer; and jacking the adjustable support by using the support jacking device to enable the jacking force of the adjustable support to the bridge to reach a set value. The invention does not need to replace the original bridge support and lift the existing bridge, thereby not only ensuring the stability of the original support, but also saving the construction time and shortening the construction period.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a construction method of an anti-overturning adjustable support of a bridge.
Background
Along with the occurrence of certain bridge overturning accidents in China, the anti-overturning research of the bridge is more concerned by the society. Due to the structural characteristics that the bridge width of the plane curve bridge supported by the single columns (also called as the independent pier columns) is small, and the transverse distance between the side supports is small, the torsional constraint of the side supports on the main beam is weaker, and meanwhile, because the torsional constraint of the middle pier on the main beam is not strong, under the action of eccentric load, the phenomena of support seat void, over-limit of the support angle of the middle pier, insufficient bearing capacity of the middle pier and the foundation and the like are easily caused, so that the stable supporting system of the main beam structure is changed, and even the whole bridge overturning accident occurs.
In order to ensure the safe operation of the bridge and improve the service condition of the bridge, the original single column of the bridge needs to be reinforced, and an anti-overturning support is newly added to ensure the stability of the bridge.
The existing bridge anti-overturning support construction method is to lift up the existing bridge and then replace or maintain the old bridge support. Therefore, the original bridge is easily disturbed in the jacking process, and potential safety hazards exist.
Disclosure of Invention
The invention aims to overcome the technical problems in the prior art, and provides a construction method of an anti-overturning adjustable support for a bridge, which is suitable for reinforcing an independent pier stud of the bridge.
The purpose of the invention is realized by the following technical scheme:
the invention provides a construction method of an anti-overturning adjustable support of a bridge, which comprises the following steps:
step S101, leveling the bottom of the box girder, and manufacturing a steel plate on the support according to the bottom gradient of the box girder after leveling;
step S102, drilling screw holes from bottom to top at the bottom of a box girder at the position to be provided with an adjustable support outside an original pier stud, and drilling screw holes on the peripheral wall of the pier stud; cleaning a screw hole;
step S104, injecting bar planting glue into a screw hole at the bottom of the box girder, and smearing the bar planting glue on the top of the upper bolt;
step S105, after the bar planting glue is injected, inserting an upper bolt of an adjustable support into a screw hole at the bottom of the bridge beam by utilizing movable support lifting equipment to enable the adjustable support to be in place; the adjustable support is propped by lifting movable support lifting equipment, the support is temporarily supported on a support mounting operation platform by adopting a support frame, and the support lifting equipment is dropped by a forklift after the support is stably supported;
step S106, injecting bar planting glue into screw holes in the peripheral wall of the pier stud, smearing the bar planting glue on the top of the steel bar nail, and implanting the steel bar nail into the screw holes in the peripheral wall of the pier stud; binding a reinforcing mesh outside the pier stud to obtain the reinforcing mesh which is interlaced vertically and horizontally and fixed with a reinforcing steel bar nail implanted into the original pier stud;
step S107, installing a steel plate protective layer on the periphery of the reinforcing mesh;
step S108, pouring concrete inside the steel plate protective layer to form a reinforced concrete layer together with the reinforcing mesh;
and step S109, jacking the adjustable support by using the support jacking device to enable the jacking force of the adjustable support to the bridge to reach a set value.
More preferably, before the step S104, the method further includes:
and S103, trial installation of the adjustable support by utilizing movable support lifting equipment, and verification of screw hole depth, perpendicularity and hole spacing.
More preferably, the construction method of the bridge anti-overturning adjustable support further comprises the following steps:
and step S110, monitoring the stability of the adjustable support until the adjustable support is in a stable state.
More preferably, the step S105 further includes:
and after the strength of the bar planting glue meets the requirement, removing the temporary support frame.
More preferably, the step S109 includes:
fastening a high-pressure grouting machine, installing an electronic pressure sensor on the high-pressure grouting machine, assembling a high-pressure pipeline and connecting the high-pressure pipeline with the high-pressure grouting machine, and aligning the outlet of a charging barrel with the feeding hole of the high-pressure grouting machine;
checking whether the two ends of the high-pressure pipeline are locked with the support valve and the joint of the discharge port of the high-pressure pipeline and whether the electronic pressure sensor is normal or not, and checking whether screws of all parts are loosened and fall off or not;
adding prepared filler into the charging barrel, starting a high-pressure grouting machine, connecting the high-pressure pipeline with a support valve and leading the filler to a filler filling opening of an adjustable support after confirming that the filler uniformly flows out from the high-pressure pipeline;
and (3) injecting the stirred filler into a cavity in the frame of the adjustable support by using a high-pressure grouting machine, so that the height of the upper sliding block of the adjustable support is continuously increased.
More preferably, the step S109 further includes:
and monitoring the synchronism of the jacking process of adjacent adjustable supports on the periphery of the same pier stud in the process of jacking the upper sliding block of the adjustable support upwards.
More preferably, according to the construction method of the bridge anti-overturning adjustable support, the bridge anti-overturning adjustable support applied thereto comprises:
the support comprises an upper support steel plate, an upper sliding block, a lower groove body and a lower support steel plate;
the upper steel plate of the support is fixed at the bottom of the bridge beam through an upper bolt; the lower steel plate of the support is fixed on the top surface of the pier stud through a lower bolt;
the upper sliding block and the lower groove body jointly form a frame body positioned between the upper steel plate of the support and the lower steel plate of the support, the upper sliding block can slide up and down in the sliding groove of the lower groove body, and a space for accommodating fillers is formed in the sliding groove; the bottom of the frame body is provided with a filler filling channel communicated with the space, the outer side of the filler filling channel is connected with a connector for connecting an external pipeline, and the filler can be filled in the filler filling channel.
More preferably, the bridge anti-overturning adjustable support further comprises
The rubber plate is additionally arranged between the upper steel plate of the support and the bottom of the bridge beam, and/or the rubber plate is additionally arranged between the lower steel plate of the support and the top surface of the pier stud.
The technical scheme of the invention can show that the invention has the following technical effects:
according to the invention, the original bridge support does not need to be replaced and the existing bridge does not need to be jacked, but the cross section of the original pier stud is increased on the premise of not influencing the use function of the existing bridge, the adjustable support is additionally arranged on the outer side of the original support, and after the newly poured pier stud concrete reaches the design strength, the newly added multiple groups of supports are unlocked and jacked in the transverse bridge direction, so that the newly added supports are tightly attached to the existing box girder; therefore, the stability of the original support can be guaranteed, the construction time can be saved, and the construction period is shortened.
The construction method can be carried out under the condition that the bridge clearance is small and a crane is not used, and is convenient to operate.
The invention has reasonable construction flow, is simple and practical, simple and easy adjustable support lifting equipment, universal materials, provides guidance for irrelevant construction and has popularization significance.
Drawings
FIG. 1 is a schematic structural diagram of an anti-overturning adjustable support for a bridge according to the present invention;
FIG. 2 is a schematic diagram of a system for the trial installation of an adjustable support;
FIG. 3 is a flow chart of the construction process of the present invention;
fig. 4 is a schematic view of the working principle of the support jacking device in the invention.
In the drawings:
the device comprises a support upper steel plate 1, an upper sliding block 2, a lower groove body 3, a rubber plate 4 and a support lower steel plate 5; the channel 31 is perfused.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present application, the present invention will be further described in detail below with reference to the accompanying drawings.
The terms of orientation such as up, down, left, right, front, and rear in the present specification are established based on the positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.
In the present invention, the terms "mounting," "connecting," "fixing," and the like are to be understood in a broad sense, and may be, for example, a fixed connection, a detachable connection, an integrated connection, or a mechanical connection. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
the invention provides an anti-overturning adjustable support for a bridge, which has a structure shown in figure 1 and comprises an upper support steel plate 1, an upper sliding block 2, a lower groove body 3, a rubber plate 4 and a lower support steel plate 5.
The upper steel plate 1 of the support is fixed at the bottom of the bridge beam through an upper bolt; the lower steel plate 5 of the support is fixed on the top surface of the pier stud through a lower bolt; the upper slide block 2 and the lower groove body 3 jointly form a frame body positioned between the support upper steel plate 1 and the support lower steel plate 5, the upper slide block 2 can slide up and down in a sliding groove of the lower groove body 3, and a space for accommodating fillers is formed in the sliding groove; the filler may be polyurethane or the like. The bottom of the frame body is provided with a filler filling channel 31 which leads to the space, the outer side of the filler filling channel 31 is connected with a joint for an external pipeline, and fillers such as polyurethane and the like can be filled in the filler filling channel 31.
In order to enable the adjustable support to be attached to the bottom of the bridge beam and the pier stud more tightly, a rubber plate 4 is additionally arranged between the steel plate on the support and the bottom of the bridge beam, and/or the rubber plate 4 is additionally arranged between the steel plate under the support and the top surface of the pier stud.
Example two:
the invention provides a construction method of an anti-overturning adjustable support of a bridge, which needs to do the following work before implementing the method:
the adjustable support of setting up tries the installation system, as shown in fig. 2, this adjustable support tries the installation system and includes: the device comprises a support mounting operation platform erected around an original pier stud and an assembled movable support lifting device. The movable support lifting equipment consists of a forklift and a support mounting support assembled by steel pipe supports, wherein the support mounting support is fixed on fork teeth of the forklift, and the height of the support mounting support is controlled along with the lifting and falling of the fork teeth of the forklift.
After the adjustable support test installation system is built, the adjustable support test installation system is utilized to start to implement the adjustable support construction method, and the specific implementation flow comprises the following steps as shown in fig. 3:
and S101, leveling the bottom of the box girder, and manufacturing a steel plate on the support according to the gradient of the leveled bottom of the box girder.
Leveling the uneven position of the bottom of the box girder in the prior art, such as leveling a bulge. And measuring the gradient of the beam bottom within the installation range of the adjustable support, and feeding the gradient back to a processing factory to manufacture the steel plate on the support.
Step S102, drilling screw holes from bottom to top at the bottom of a box girder at the position to be provided with an adjustable support outside an original pier stud, and drilling screw holes on the peripheral wall of the pier stud; and cleaning the screw holes, such as blowing impurities in the screw holes.
In this step, make drilling template according to the steel sheet on the support of adjustable support to according to drilling template and holing in the case roof beam bottom, be used for installing the steel sheet on the support of adjustable support, this screw requires the position accuracy, guarantees straightness that hangs down, hole depth and hole interval.
And step S103, trial installation of the adjustable support.
Fixing an upper bolt on a support upper steel plate, assembling a frame body, a rubber plate and the support upper steel plate together, carrying out trial installation on the adjustable support of the part by utilizing movable support lifting equipment, carrying out trial installation on the adjustable support to the bottom of a bridge beam by utilizing the support lifting equipment, measuring the levelness of the adjustable support by utilizing a horizontal ruler, and checking the depth, the verticality and the hole spacing of a screw hole.
And step S104, injecting bar planting glue into the screw hole at the bottom of the box girder, and smearing the bar planting glue on the top of the upper bolt.
After the adjustable support is qualified in test installation and verification, the adjustable support part to be installed is taken down by utilizing movable support lifting equipment; the steel bar planting glue is injected into a screw hole reserved for the steel plate on the support at the bottom of the box girder, the steel bar planting glue is smeared at the top of the upper bolt, and the steel bar planting glue is ensured to be full. The bar-planting glue adopts quick-drying type A-level bar-planting glue, and adopts a finished product special modified epoxy adhesive.
Step S105, mounting of the adjustable support
After the bar planting glue is injected, the upper bolt of the adjustable support is inserted into the screw hole at the bottom of the bridge beam by utilizing movable support lifting equipment, so that the adjustable support is in place.
After the adjustable support is in place, the adjustable support is propped by lifting movable support lifting equipment, the adjustable support is temporarily supported by a support frame (such as a plurality of frame pipes) on a support mounting operation platform, and the support lifting equipment is dropped by a forklift after the support is stably supported, so that the adjustable support is mounted and fixed. And after the strength of the bar planting glue meets the requirement, removing the temporary support frame.
Step S106, binding the reinforcing mesh at the periphery of the original pier stud
After the adjustable support is installed, injecting bar planting glue into screw holes in the peripheral wall of the pier stud, smearing the bar planting glue on the top of the steel bar nail, and implanting the steel bar nail into the screw holes in the peripheral wall of the pier stud; the bar-planting adhesive adopts a modified epoxy adhesive.
And binding a reinforcing mesh outside the pier stud after the bar planting glue for anchoring the reinforcing nails is determined to be stable, obtaining the reinforcing mesh which is interlaced together in a criss-cross manner, and fixing the reinforcing mesh and the reinforcing nails implanted into the original pier stud together.
Step S107, installing a steel plate protective layer on the periphery of the reinforcing mesh
The steel plate protective layer of each pier stud is formed by assembling a plurality of steel plates, wherein the steel plate positioned at the lowest part is welded with a flange plate on the top surface of the bearing platform. And each steel plate is firstly manually subjected to interface correction by using a chain block and a crowbar and is installed by matching with a forklift.
And S108, pouring concrete inside the steel plate protective layer to form a reinforced concrete layer with the steel bar net.
And pouring the top surface of the reinforced concrete layer to be attached to the bottom surface of the lower steel plate of the support.
The concrete is transported by adopting a tank truck, the concrete tank truck is positioned above the bridge, the concrete is filled into a mould by utilizing a funnel and a guide pipe, and the attached vibrator is adopted for vibrating.
And step S109, jacking the adjustable support by using the support jacking device to enable the jacking force of the adjustable support to the bridge to reach a set value.
And when the strength of the reinforced concrete layer of the pier column reaches 90% of the design strength, jacking the adjustable support by using the support jacking device shown in figure 4. The jacking of the adjustable support is the key of the construction method, and the following steps are required to be executed:
(1) installing a support jacking device and other auxiliary parts: the support jacking device consists of a high-pressure grouting machine, an electronic pressure sensor, a high-pressure pipeline, a support valve and a charging barrel. For the convenience of operation, the support valve adopts a handle switch valve. The steps for assembling the support jacking device are as follows: firstly, fastening a high-pressure grouting machine; then, mounting the electronic pressure sensor on a high-pressure grouting machine; next, assembling a high-pressure pipeline and connecting the high-pressure pipeline with a high-pressure grouting machine, and aligning the outlet of the charging barrel with the feeding hole of the high-pressure grouting machine; and finally, connecting the high-pressure pipeline and the support valve and leading to a filler filling port of the adjustable support. Therefore, the support jacking device is installed. Other auxiliary parts include a pressure gauge for detecting the pressure on the high-pressure pipeline, a dial gauge for measuring the height of the adjustable support, a bypass valve installed on the high-pressure pipeline, and the like.
The joints of all parts of the support jacking device must be locked, and a sealing ring and a sealing adhesive tape are additionally arranged, particularly, nuts at two ends of a high-pressure pipe must be locked, so that filler slurry is not sprayed out when filler is filled.
(2) Before the step of connecting the high-pressure line with the seat valve and leading to the filler filling opening of the adjustable seat, the following steps are carried out:
before debugging and starting up, whether the two ends of the high-pressure pipeline are locked with the joints of the support valve and the discharge port of the high-pressure pipeline or not and whether the electronic pressure sensor is normal or not are checked, and whether screws of all parts are loosened and fall off or not is checked.
Adding prepared filler (such as polyurethane) into the charging barrel, starting the high-pressure grouting machine, confirming that the filler uniformly flows out of the high-pressure pipeline, indicating that all air in the high-pressure pipeline is discharged, and connecting the connector of the discharge port of the high-pressure pipeline with the connector of the filler filling port of the adjustable support. By doing so, it is possible to avoid injecting air into the frame of the adjustable support.
And (3) injecting the stirred filler into a cavity in the frame of the adjustable support by using a high-pressure grouting machine, so that the height of the upper sliding block of the adjustable support is continuously increased. In the process of upward jacking of the upper sliding block of the adjustable support, the synchronicity of the jacking process of adjacent adjustable supports on the periphery of the same pier column is checked at any time so as to avoid generating overlarge height difference (generally not exceeding 2 mm). At the same time, the height adjustment condition can be known at any time through the measuring device.
Because the support jacking device adopts good rubber plate sealing measures and is provided with the filler filling channel 31, the filler can be filled into the cavity of the adjustable support frame body by utilizing the characteristics of the support jacking device. In the process of heightening the adjustable support, the adjustable support can apply a certain jacking force to the bridge body at the same time.
The load stress of the adjustable support is measured, and the load stress can also be measured simultaneously in the height adjustment process of the adjustable support. And after confirming that the elevation of the box girder body and the required jacking force reach set values, closing the support valve and the high-pressure grouting machine to prevent the polyurethane from extruding or refluxing from the interior of the frame body of the adjustable support.
And step S110, monitoring the stability of the adjustable support until the adjustable support is in a stable state.
After the height-adjusting construction of the adjustable support is finished, the stability of the use condition of the adjustable support is monitored within set time. The setting time is determined according to the final curing time period of the polyurethane colloid injected in the support, for example, the continuous monitoring time is 2 to 3 days. And confirming that the adjustable support is in a stable state until the final residual jacking force (or displacement) of the adjustable support is not lower than 80% of the jacking force (or displacement) after the height-adjusting construction and the variation amplitude of the residual jacking force (or displacement) is not more than 5% within 12 hours.
The construction process is reasonable, simple and practical, the structure of the support lifting equipment for installing the adjustable support is simple and easy, the materials are general, guidance is provided for irrelevant construction, and the construction method has popularization significance.
Although the present invention has been described in terms of the preferred embodiment, it is not intended that the invention be limited to the embodiment. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. The scope of the invention should therefore be determined with reference to the appended claims.
Claims (8)
1. The construction method of the bridge anti-overturning adjustable support is characterized by comprising the following steps:
step S101, leveling the bottom of the box girder, and manufacturing a steel plate on the support according to the bottom gradient of the box girder after leveling;
step S102, drilling screw holes from bottom to top at the bottom of a box girder at the position to be provided with an adjustable support outside an original pier stud, and drilling screw holes on the peripheral wall of the pier stud; cleaning a screw hole;
step S104, injecting bar planting glue into a screw hole at the bottom of the box girder, and smearing the bar planting glue on the top of the upper bolt;
step S105, after the bar planting glue is injected, inserting an upper bolt of an adjustable support into a screw hole at the bottom of the bridge beam by utilizing movable support lifting equipment to enable the adjustable support to be in place; the adjustable support is propped by lifting movable support lifting equipment, the support is temporarily supported on a support mounting operation platform by adopting a support frame, and the support lifting equipment is dropped by a forklift after the support is stably supported;
step S106, injecting bar planting glue into screw holes in the peripheral wall of the pier stud, smearing the bar planting glue on the top of the steel bar nail, and implanting the steel bar nail into the screw holes in the peripheral wall of the pier stud; binding a reinforcing mesh outside the pier stud to obtain the reinforcing mesh which is interlaced vertically and horizontally and fixed with a reinforcing steel bar nail implanted into the original pier stud;
step S107, installing a steel plate protective layer on the periphery of the reinforcing mesh;
step S108, pouring concrete inside the steel plate protective layer to form a reinforced concrete layer together with the reinforcing mesh;
and step S109, jacking the adjustable support by using the support jacking device to enable the jacking force of the adjustable support to the bridge to reach a set value.
2. The construction method of the bridge anti-overturning adjustable support according to claim 1, further comprising before the step S104:
and S103, trial installation of the adjustable support by utilizing movable support lifting equipment, and verification of screw hole depth, perpendicularity and hole spacing.
3. The construction method of the bridge anti-overturning adjustable support according to claim 1, characterized in that the construction method of the bridge anti-overturning adjustable support further comprises:
and step S110, monitoring the stability of the adjustable support until the adjustable support is in a stable state.
4. The construction method of the bridge anti-overturning adjustable support according to claim 1, wherein the step S105 further comprises:
and after the strength of the bar planting glue meets the requirement, removing the temporary support frame.
5. The construction method of the bridge anti-overturning adjustable support according to claim 1, wherein the step S109 comprises:
fastening a high-pressure grouting machine, installing an electronic pressure sensor on the high-pressure grouting machine, assembling a high-pressure pipeline and connecting the high-pressure pipeline with the high-pressure grouting machine, and aligning the outlet of a charging barrel with the feeding hole of the high-pressure grouting machine;
checking whether the two ends of the high-pressure pipeline are locked with the support valve and the joint of the discharge port of the high-pressure pipeline and whether the electronic pressure sensor is normal or not, and checking whether screws of all parts are loosened and fall off or not;
adding prepared filler into the charging barrel, starting a high-pressure grouting machine, connecting the high-pressure pipeline with a support valve and leading the filler to a filler filling opening of an adjustable support after confirming that the filler uniformly flows out from the high-pressure pipeline;
and (3) injecting the stirred filler into a cavity in the frame of the adjustable support by using a high-pressure grouting machine, so that the height of the upper sliding block of the adjustable support is continuously increased.
6. The construction method of the bridge anti-overturning adjustable support according to claim 5, wherein the step S109 further comprises:
and monitoring the synchronism of the jacking process of adjacent adjustable supports on the periphery of the same pier stud in the process of jacking the upper sliding block of the adjustable support upwards.
7. The construction method of the bridge anti-overturning adjustable support according to any one of claims 1 to 6, wherein the bridge anti-overturning adjustable support applied by the construction method of the bridge anti-overturning adjustable support comprises the following steps:
the support comprises an upper support steel plate (1), an upper sliding block (2), a lower groove body (3) and a lower support steel plate (5);
the upper steel plate (1) of the support is fixed at the bottom of the bridge beam through an upper bolt; the lower steel plate (5) of the support is fixed on the top surface of the pier stud through a lower bolt;
the upper sliding block (2) and the lower groove body (3) jointly form a frame body positioned between the upper steel plate (1) of the support and the lower steel plate (5) of the support, the upper sliding block (2) can slide up and down in a sliding groove of the lower groove body (3), and a space for accommodating fillers is formed in the sliding groove; the bottom of the frame body is provided with a filler filling channel (31) communicated with the space, the outer side of the filler filling channel (31) is connected with a joint for an external pipeline, and the filler can be filled in the filler filling channel (31).
8. The method for constructing the bridge anti-overturning adjustable support saddle according to claim 7, wherein the bridge anti-overturning adjustable support saddle further comprises
Rubber slab (4) of installing additional between steel sheet (1) and the bridge beam bottom on the support, and/or, rubber slab (4) of installing additional under the support between steel sheet (5) and pier column top surface.
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| CN111519522A (en) * | 2020-06-05 | 2020-08-11 | 招商局重庆交通科研设计院有限公司 | Bridge beam supports adjusting device |
| CN112854025A (en) * | 2021-01-13 | 2021-05-28 | 中铁九局集团有限公司 | Construction method for treating corner overrun defect of high-speed railway bridge support |
| CN113152262A (en) * | 2021-03-24 | 2021-07-23 | 北京首发公路养护工程有限公司 | Bridge single-column pier reinforcement construction method |
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| CN111473983A (en) * | 2020-04-09 | 2020-07-31 | 中铁十四局集团第一工程发展有限公司 | Bottom die of assembled precast beam pedestal |
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| CN112854025A (en) * | 2021-01-13 | 2021-05-28 | 中铁九局集团有限公司 | Construction method for treating corner overrun defect of high-speed railway bridge support |
| CN113152262A (en) * | 2021-03-24 | 2021-07-23 | 北京首发公路养护工程有限公司 | Bridge single-column pier reinforcement construction method |
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