CN108755419B - Construction platform for hoisting bridge shock-proof steel stop block and installation method - Google Patents
Construction platform for hoisting bridge shock-proof steel stop block and installation method Download PDFInfo
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- CN108755419B CN108755419B CN201810484098.0A CN201810484098A CN108755419B CN 108755419 B CN108755419 B CN 108755419B CN 201810484098 A CN201810484098 A CN 201810484098A CN 108755419 B CN108755419 B CN 108755419B
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention relates to a construction platform for hoisting a bridge shock-proof steel stop block and an installation method, wherein the construction platform is installed on a large automobile crane arm; firstly, moving a construction platform to the ground through a large arm of an automobile crane, and moving a shockproof check block from an opened operation door to a bottom plate of the construction platform; the automobile crane large arm rises to the pier top of the installation shockproof check block, the locating plate is tightly attached to the pier top groove plane to achieve locating, the butt strap is connected to the pier top in a lap joint mode, one end of the construction platform moves upwards through screw rod sleeve structure adjustment, the shockproof check block slides into the pier top groove, the shockproof check block and the embedded steel plate alignment bolt are adjusted, and the installation of the shockproof check block is pressed through the bolt. The invention provides a construction platform for simply and quickly hoisting a bridge shock-proof steel stop block which directly conveys the shock-proof stop block to a pier groove and an installation method.
Description
Technical Field
The invention relates to the field of bridge viaduct erection, in particular to a construction platform for hoisting a bridge shockproof steel stop block and an installation method.
Background
The bridge shock-proof steel stop block is mainly used for limiting the transverse displacement of a bridge superstructure, a transverse stop block (or a shear key) is usually arranged on a bent cap or a bridge abutment, the stop block is divided into an inner stop block and an outer stop block by related specifications, the inner stop block is usually penetrated into the girder body from the abutment or between the girders, the outer stop block is usually arranged on two sides of the superstructure, and a wing wall of the bridge abutment is usually used as the outer stop block. Under the earthquake effect, the dog not only plays the effect of horizontal spacing, preventing the roof beam that falls, can also protect the antidetonation security of support. The existing shockproof steel stop block is an irregular steel member and needs to be installed on an embedded steel plate at the bottom of a erected box girder. During installation, the plane requirement of the anti-falling beam stop block with the bolt hole is accurately aligned with the embedded steel plate bolt hole at the bottom of the box beam, and then the installation work is completed through bolt connection. When the shock-proof steel stop block does not act, the box girder can vibrate freely, and when the shock-proof steel stop block acts, the vibration of the box girder is restrained.
The shock-proof steel stop block is generally installed after the girder erection, if the shock-proof steel stop block is installed before the girder erection, although the shock-proof steel stop block is very convenient, the girder feeding and support grouting during girder erection can be affected by the shock-proof steel stop block installed in advance, and the position of the shock-proof girder stop block coincides with the position of the jack, so that normal girder falling cannot be realized. The vibration-proof steel stop block is mainly hung onto a pier groove by means of manual cooperation of a crane or a lifting platform under the limitation of the space of the bottom of a box girder and the top surface of a pier, for example, after angle steel is pre-buried at the top of the pier, a simple cantilever crane is arranged for installation, 4 operators are arranged at the top of the pier to cooperate to centralize and accurately position the vibration-proof steel stop block, the operators are also required to specially operate the simple cantilever crane and the operation of an electric and manual hoist, the transfer of the simple cantilever crane is required to cooperate with the transfer of the crane and the repeated installation and disassembly, the working procedure is very complicated, and the vibration-proof steel stop block of each bridge with one hole is required to be transferred for 1 time; if the crane is used for manually installing the shock-proof beam stop block, after the crane lifts the shock-proof beam stop block to the height of the bottom of the box girder, the shock-proof beam stop block is manually pulled to the groove of the pier by using a steel wire rope, 8-9 persons (each person pulls 100kg in mid-air) are required to operate by adopting manual completion, if the space can not accommodate constructors, the mechanical push-pull assistance is required to be assisted, the completion is difficult when the shock-proof beam stop block is positioned in a limited space, and special persons are required to be arranged for unified command, so the construction difficulty is great; the shock-proof beam stop blocks with pier heights smaller than 10 meters are installed by using a forklift which is changed by a loader, the pier heights limit flexible application of the shock-proof beam stop blocks, particularly, the platform cannot be lowered to the ground, the shock-proof beam stop blocks are required to be installed in the platform by matching with other equipment, the connection difficulty between the platform and the loader is also high, a certain safety risk exists, and the shaking of the platform in the lifting process generates fear to the psychology of operators; the utility model provides a prevent roof beam dog installing the system that falls that releases in railway bridge construction, be the hoisting accessory of fixed prevent falling the roof beam dog that sets up between frame case roof beam bottom and pier recess, with the accurate counterpoint dolly of prevent falling the roof beam dog between frame case roof beam bottom and the pier top, when striding pier operation, need take corresponding measure to assist, the self-moving hoisting accessory of setting up on frame case roof beam face is got rid of the influence of bridge floor construction, require to leave a construction passageway for it, the operating personnel gets into pier top construction, and when moving, need be equipped with 2-3 people in addition along with its removal inspection line, the clearance traffic line obstacle, the coordinated command etc. that the system reciprocated all need arrange personnel, its velocity of movement is slower.
The installation method of the shockproof steel stop block has larger potential safety hazard, and has high labor intensity and slow installation speed during operation, thereby increasing the construction cost.
Disclosure of Invention
The invention aims to overcome the defects of low installation speed, high labor intensity and high cost of the traditional bridge shock-proof steel stop block and provides a construction platform and an installation method for directly conveying the shock-proof steel stop block to the bridge shock-proof steel stop block of the pier groove in a simple and quick manner.
In order to achieve the above object, the present invention provides the following technical solutions: a construction platform for hoisting a bridge shock-proof steel stop block comprises a bottom plate, a fence and an operation door, wherein a positioning plate perpendicular to the bottom plate is fixedly arranged below the bottom plate on the outer side of the operation door, and a butt strap with the width not less than 10cm is reserved on the bottom plate on the outer side of the positioning plate and used for being lapped with a pier top; one end of the construction platform bottom plate is hinged with one end of the end steel plate at the top end of the automobile crane boom, and the other end of the construction platform bottom plate is connected with the other end of the end steel plate through a screw rod sleeve structure capable of adjusting the horizontal height of the construction platform bottom plate.
The bottom plate is far away from one end of the positioning plate and is provided with two symmetrically arranged first sleeves, the first sleeves penetrate through the bottom plate of the construction platform, the upper end faces of the first sleeves are parallel to the bottom plate, adjustable screw rods with outer threads are respectively inserted into the two first sleeves, the outer diameter of each adjustable screw rod is smaller than the inner diameter of the corresponding first sleeve, the upper end of each adjustable screw rod is provided with an adjusting sleeve which can drive the corresponding adjustable screw rod to rotate only in one direction, each adjusting sleeve is provided with an external thread and an internal thread, the external threads of each adjusting sleeve are matched with the internal threads of the corresponding first sleeve, the internal threads of each adjusting sleeve are buckled with the external threads of the corresponding adjustable screw rod, and the adjusting sleeve is screwed into a gap between the corresponding first sleeve and each adjustable screw rod; the front end and the rear end of the end steel plate of the large arm of the automobile crane are respectively provided with a bolt sleeve penetrating through the end steel plate, each bolt sleeve is internally provided with an internal thread, both ends of each bolt sleeve are screwed into a screw rod, the screw rods are provided with external threads matched with the internal threads of the bolt sleeves at the screwed-in positions, the other ends of the two screw rods screwed into the front ends of the end steel plate are respectively inserted into sleeve supports at the lower ends of the two second sleeves, the adjustable screw rods are screwed into the second sleeves, and the external threads of the adjustable screw rods are matched with tapping holes in the second sleeves to form a screw rod sleeve structure; two symmetrical hinge brackets are welded on two sides of the lower end face of the bottom plate close to the positioning plate, the lower end of each hinge bracket is provided with a third sleeve, and the other ends of two screw rods at the rear end of the end steel plate are respectively inserted into the two third sleeves to form hinge; the bottom plate of the construction platform is hinged with a bolt at one end of the large arm of the automobile crane, the other end of the construction platform is matched with the bottom plate to be connected with the bottom plate through a screw rod sleeve structure, and the adjusting sleeve is rotated to adjust the upper and lower positions of the pier facing side of the bottom plate, so that the horizontal inclination angle of the construction platform is adjusted; the adjusting sleeve is provided with a handle.
The construction platform bottom plate includes bearing structure and steel sheet, and bearing structure manufacturing method is: two square steel with the length of 10cm is adopted as a spandrel girder, the spandrel girder is 200cm long and is arranged according to the interval of 60 cm; the distribution beams are made of 10 cm-10 cm angle steel, the spacing is arranged according to 40cm, and the distribution beams and the spandrel girder are firmly welded to form a bearing structure; the steel plates are welded to the distribution beams of the load-bearing structure.
A method of installing a bridge shock resistant steel chock, the method comprising: (1) Taking an embedded steel plate which is anchored with the shock-proof steel stop block and has the same size and the same bolt hole position as a bottom die, and pouring and embedding along with concrete, wherein the embedded steel plate adopts a double-bolt sleeve structure; (2) The construction platform is arranged on the end steel plate on the big arm of the automobile crane, one end of the bottom plate, which is close to the positioning plate, is hinged with a screw rod screwed in the bolt of the end steel plate, the bottom plate, which is far away from one end of the positioning plate, is connected with the front end of the end steel plate through a screw rod sleeve structure, and the screw rod sleeve is adjusted to adjust the horizontal inclination angle of the bottom plate and the end steel plate; (3) Firstly, moving a construction platform to the ground through a large arm of an automobile crane, manually moving a shock-proof steel stop block from an opened operation door to a bottom plate of the construction platform, and arranging a plurality of rollers at the lower part of the shock-proof steel stop block; (4) Arranging an operation platform for installing an anti-vibration steel stop block on the pier top by an operator, lifting a large arm of an automobile crane to the pier top for installing the anti-vibration steel stop block, enabling a positioning plate of a construction platform to be tightly attached to the plane of a groove of the pier top to realize positioning, enabling the lapping plate to be lapped on the pier top, enabling one end of the construction platform to move upwards through adjustment of a screw rod sleeve structure, enabling a bottom plate of the construction platform to form an inclined angle with the plane of the groove of the pier top, and enabling the anti-vibration steel stop block to conveniently enter the plane of the groove of the pier top by utilizing rolling rod sliding at the lower part of the anti-vibration steel stop block; (5) An operator slowly pulls the shockproof steel stop block into the groove plane of the pier top by utilizing the inclination angle, so that the shockproof steel stop block is ensured to move to the lower part of the embedded bolt sleeve, the directions of the shockproof steel stop block and the embedded steel plate are regulated, and the conveying task of the shockproof steel stop block into the working surface is completed; (6) And adjusting an alignment bolt of the shockproof steel stop block and the embedded steel plate, and compressing and installing the shockproof steel stop block through the bolt.
In the step (2), the connection mode of the steel plate at the end of the large arm of the automobile crane and the construction platform is as follows: when the axis direction of the third sleeve is consistent with the axis direction of the bolt sleeve at the front end of the end steel plate, two screws are respectively inserted into the two third sleeves, the other ends of the screws are respectively screwed into the inner holes of the bolt sleeve at the front end of the end steel plate and serve as shafts for hinging the construction platform and the end steel plate, so that two third sleeves welded at the bottom of the construction platform form a hinging mode with the horizontal screws in the bolt sleeve of the end steel plate; two screws are respectively inserted into the two sleeve supports, the other end of each screw is screwed into two holes of a bolt sleeve at the rear end of the end steel plate, then the lower end of the adjustable screw is downwards inserted into the inner screw of the second sleeve from the opening of the first sleeve, the inner diameter of the first sleeve is larger than that of the second sleeve, the outer screw at the lower end of the adjustable screw is matched with the inner screw of the second sleeve, after the position of the adjustable screw is determined, the adjusting sleeve is screwed into a gap between the first sleeve and the adjustable screw, and the adjustable screw only rotates along with the adjusting sleeve in one direction; and when the adjusting sleeve is rotated on the construction platform by taking one hinged end as a fulcrum, the adjustable screw rod moves up and down relative to the first sleeve, so that the horizontal inclination angle between the construction platform and the end steel plate is adjusted, and the maximum horizontal inclination angle between the construction platform and the end steel plate is 15 degrees.
Four corners of the shock-proof steel stop block are fixedly connected with hooks arranged at four corners of the fence of the construction platform by adopting a steel wire rope, so that the shock-proof steel stop block is prevented from sliding on the rolling rod in the conveying and rising process.
One end of the embedded steel plate is embedded into the concrete by adopting a sleeve bolt when the embedded steel plate is fixed by the anti-vibration steel stop block, the other end of the embedded steel plate is exposed to be used for being connected with the anti-vibration steel stop block, and the bolt sleeve on one exposed side of the steel plate is exposed by 2-3cm, so that the concrete pouring of the beam body is finished, the bolt installation of the anti-vibration steel stop block is conveniently fixed after the die is removed, and the accurate alignment of the bolt hole of the anti-vibration steel stop block and the bolt sleeve is also convenient.
The check block is jacked up by using a mechanical jack, when the distance from the check block to the embedded steel plate is 5-10cm, a phi 20 steel pipe with the length of 35cm can be used for aligning the shockproof steel check block with the bolt hole of the embedded part, then all bolts are screwed, so that the level of the shockproof steel check block is ensured as much as possible, and the bolt is prevented from being misplaced; after the bolts are screwed on, the mechanical jack falls down for 3-4mm firstly, after the shockproof steel stop block is self-leveling, the jack is lifted up until the shockproof steel stop block is pushed to intersect with the embedded steel plate, and the bolts are continuously screwed up in the pushing process of the jack.
The gap between the shockproof steel stop block and the embedded steel plate is filled with the steel wedge plate which is used for anti-corrosion treatment after the shockproof steel stop block is installed, and when the thickness and the gap are different, the proper wedge plate is selected according to the size of the gap and is firmly welded with the steel plate.
The specific installation method in the step (6) is as follows: manually aligning the pre-buried bolt sleeve with the bolt hole of the anti-vibration steel stop block, penetrating the bolts, firstly, feeding 2-3 wires on the bolts one by one, withdrawing the rolling rod under the anti-vibration steel stop block, then lifting the anti-vibration steel stop block to the pre-buried steel plate at the beam bottom by using a mechanical jack, closely attaching the anti-vibration steel stop block to the pre-buried steel plate, completing the alignment adjustment of the anti-vibration steel stop block and the pre-buried steel plate bolt, and forcefully pressing the pre-buried steel plate by using the flat head bolt to complete the installation work of the anti-vibration steel stop block until all the bolts reach the designed torsion.
The technical scheme of the invention has the following positive effects:
1. according to the invention, the shock-proof steel stop block is conveyed by the automobile hanging construction platform to directly reach the pier groove, and the lifting process does not need manpower to cooperate; the construction platform can be conveniently placed in the platform by the shockproof steel stop block, and can also be raised to the groove of the bridge pier top, so that the construction platform is more convenient to operate and wider in application range;
2. the constructor and the shockproof steel stop block finish the operation in the construction platform, so that potential safety hazards of construction falling can be prevented, the constructor is safe and controlled, and meanwhile, the approach and evacuation of personnel and operators are solved;
3. in order to ensure the safety of the shockproof steel stop block and the delivery process of operators, the periphery of the movable construction operation platform is provided with a steel bar fence, and one side of the movable construction operation platform, which faces the pier top of the bridge, is provided with a door, so that the operators can conveniently enter and exit from the bridge pier top, and the stop block can be conveniently loaded and unloaded. In the ascending process of the platform, four corners of the stop block are fixed firmly by using steel wire ropes, so that the stop block is prevented from sliding in the ascending process; when the pier top moves the stop block, a safety rope is arranged on the operation platform to prevent the stop block from sliding and falling, and an operator bolts the safety belt to be connected with the platform and the large arm so as to ensure safety.
4. The screw rod sleeve structure is adopted to connect the construction platform and the large arm of the automobile crane, the horizontal inclination angle of the bottom plate of the construction platform can be adjusted by adjusting the screw rod, and then the shock-proof steel stop block can be simply pulled into the pier groove by utilizing the inclination angle, so that the use is convenient and the labor is saved;
5. the shock-proof steel stop block can be delivered to the pier position with any height in the lifting range of the automobile crane, and the construction transfer is flexible.
6. The double-sleeve design concept is adopted, so that the alignment and anchoring operation of the shockproof steel stop block and the embedded steel plate are simpler and more convenient.
7. The invention has reasonable design and simple and convenient use, reduces labor intensity, improves operation efficiency, eliminates potential safety hazard and reduces installation cost.
Drawings
Fig. 1 is a schematic structural view of a construction platform according to the present invention.
Fig. 2 is a schematic structural view of an end steel plate of a large arm of the automobile crane.
Fig. 3 is a schematic diagram of a partial structure of the bottom plate and the steel plate at the end of the large arm of the automobile crane riveted by a steel bar bolt.
Fig. 4 is a schematic structural view of the connection of the bottom plate and the steel plate at the end of the large arm of the automobile crane through the screw sleeve structure.
Fig. 5 is a schematic structural view of a load bearing structure of the present invention.
FIG. 6 is a partial schematic side view of the construction platform and end steel plate of the present invention after placement of the shock resistant steel stop.
The figures are marked as follows: 1. a bottom plate; 2. a fence; 3. an operation door; 4. a positioning plate; 5. a butt strap; 6. end steel plates; 7. a screw; 8. a first sleeve; 9. a sleeve support; 10. an adjustable lead screw; 11. a second sleeve; 12. a third sleeve; 13. a hinge bracket; 14. a load bearing structure; 15. a plug pin sleeve; 16. an adjustment sleeve; 17. a handle; 18. shockproof steel stop blocks; 19. and (5) rolling bars.
Detailed Description
The technical scheme of the invention is further described and illustrated below with reference to the accompanying drawings and specific embodiments.
Examples: installation case of four-ring corrugated steel web box Liang Fangzhen steel stop block for ridge-sea rapid channel engineering canal south road to west
1. Engineering profile:
the steel stop block of the four-ring corrugated steel web box Liang Fangzhen of the Zhengzhou mountain long sea rapid channel engineering canal from the south to the west is formed by welding three types of steel plates of N1×1+N2×2+N3×5, the total weight is 1.039t, and the maximum geometric dimension is length×width×height=1460 mm×1460mm×960mm. The clearance between the transverse bridge direction of the stop block and the two sides of the groove of the bridge pier is 200mm, the clearance between the transverse bridge direction of the stop block and the two sides of the groove of the bridge pier is 100mm, and the width and the height of the operable space of the support cushion stones of the bridge No. 1 and No. 2 are about 1.6m multiplied by 0.8m. If the stop block construction adopts a welding assembly process after single installation, a large number of overhead welding operations need to be completed, and the construction difficulty is very high, the construction quality cannot be ensured, and potential safety hazards exist due to the limitation of installation space. Therefore, the whole assembly of the stop block is completed and then the whole assembly is carried out.
Because the shock-proof steel stop block of the engineering is arranged at the center part of the beam bottom, the shock-proof steel stop block cannot be lifted in place by adopting a simple cantilever crane, and the shock-proof steel stop block is required to be pulled by manpower, and can not be stretched and forced by people in a narrow space, the stop block with the weight of approximately 1t is not realistic to be pulled in place, and the safety risk can be caused to operators or simple equipment due to the swinging of the stop block after the lifting; the forklift platform conveying stop block is changed by adopting a loader, and the bridge pier height is close to 20m, so that the bridge pier cannot be effectively implemented; the anti-falling beam stop block mounting system used in railway bridge construction is adopted to mount the anti-falling beam stop block, although the construction task can be safely and effectively completed, the complex structural design and the combined application of various devices are complex in procedure, the construction scheduling difficulty is high, the weight (1039 kg) of the anti-falling beam stop block is far greater than 150kg of the railway bridge, and the lifting capacity and the structural design of the fixed anti-falling beam stop block lifting device, the anti-falling beam stop block accurate alignment trolley, the self-moving lifting device, the trolley wheels, the frame, the wire rope hooks, the electric hoist and the like are required to be redesigned, calculated and rechecked.
2. The construction platform hoisted by the shock-proof steel stop block is used for installing the shock-proof steel stop block, and as shown in figures 1-6, the construction platform comprises a bottom plate 1, a fence 2 and an operation door 3, a positioning plate 4 perpendicular to the bottom plate is fixedly arranged below the bottom plate outside the operation door, and a butt strap 5 with the width not less than 10cm is reserved on the bottom plate outside the positioning plate and used for being lapped with a pier top; one end of the construction platform bottom plate is hinged with one end of the end steel plate 6 at the top end of the automobile crane boom, and the other end of the construction platform bottom plate is connected with the other end of the end steel plate through a screw rod sleeve structure capable of adjusting the horizontal height of the construction platform bottom plate.
The steel plate at the end of the top end of the large arm of the automobile crane is a steel plate, and square grooves are formed in the middle positions of the front end and the rear end of the large arm, as shown in fig. 2.
The bottom plate is far away from one end of the positioning plate and is provided with two symmetrically arranged first sleeves 8, the first sleeves penetrate through the bottom plate of the construction platform, the upper end faces of the first sleeves are parallel to the bottom plate, adjustable screws 10 with external tapping are respectively inserted into the two first sleeves, the outer diameter of each adjustable screw is smaller than the inner diameter of each first sleeve, the upper end of each adjustable screw is provided with an adjusting sleeve 16 capable of driving the corresponding adjustable screw to rotate in one direction, each adjusting sleeve is provided with an inner thread and an outer thread, the inner threads of each adjusting sleeve are buckled with the outer threads of the corresponding adjustable screw, the corresponding adjustable screw is driven to rotate in one direction, the inner threads of the corresponding first sleeve are arranged in the corresponding first sleeve, the corresponding adjusting sleeve is matched with the corresponding inner threads of the corresponding first sleeve, the corresponding adjusting sleeve can be screwed into a gap between the corresponding first sleeve, and the corresponding adjustable screw can be driven to move upwards relative to the first sleeve; the front end and the rear end of the end steel plate of the large arm of the automobile crane are respectively provided with a bolt sleeve 15 penetrating through the end steel plate, the bolt sleeves are internally provided with internal threads, the two ends of each bolt sleeve are screwed into screw rods 7, the screw rods are provided with external threads matched with the internal threads of the bolt sleeves at the screwed-in positions, the other ends of the two screw rods screwed into the front end of the end steel plate are respectively inserted into two sleeve supports 9, the second sleeve 11 is internally tapped, an adjustable screw rod is screwed into the second sleeve, and the external threads of the adjustable screw rod are matched with the internal threads of the second sleeve to form a screw rod sleeve structure; two symmetrical hinge brackets 13 are welded on two sides of the lower end face of the bottom plate close to the locating plate, the lower end of each hinge bracket is provided with a third sleeve 12, the other ends of two screws at the rear end of the end steel plate are respectively inserted into the two third sleeves to form hinge, the bottom plate of the construction platform is hinged with a bolt at one end of a large arm of the automobile crane, the other ends of the hinge brackets are matched with the bottom plate to be connected with the bottom plate through a screw sleeve structure, an adjustable screw is adjusted, the upper and lower positions of the side of the bottom plate adjacent to the pier are adjusted, and then the horizontal inclination angle of the construction platform is adjusted. The maximum horizontal inclination angle of the construction platform and the end steel plate is 15 degrees.
The adjustment sleeve is provided with a handle 17.
The construction platform bottom plate includes bearing structure 14 and steel sheet, and bearing structure preparation mode is: two square steel with the length of 10cm is adopted as a spandrel girder, the spandrel girder is 200cm long and is arranged according to the interval of 60 cm; the distribution beams are made of 10 cm-10 cm angle steel, the spacing is arranged according to 40cm, and the distribution beams and the spandrel girder are firmly welded to form a bearing structure; the steel plates are welded to the distribution beams of the load-bearing structure.
The installation steps of the shock-proof steel stop block by adopting the construction platform are as follows:
step 1, taking a steel plate which is the same as an anchor steel plate of the shock-proof steel stop block 18 in size and the position of a bolt hole as a bottom die, and embedding the steel plate into concrete along with concrete pouring, wherein the embedded steel plate adopts a double-bolt sleeve structure, one embedded end adopts sleeve bolts to be embedded in the concrete, the exposed length of the other side is 2-3cm for being connected with the shock-proof steel stop block, and the embedded steel plate adopts anchor bars and anchor bolts to be anchored at the cast-in-situ concrete beam end to serve as a connecting plate of the shock-proof steel stop block.
And 2, finishing welding operation of the anti-vibration block by adopting industrial operation, derusting and galvanization to finish anti-corrosion treatment of the anti-vibration steel block, and transporting to the site for standby.
Step 3, manufacturing a construction platform, wherein two square steel with the length of 10cm is adopted as a spandrel girder, the length of the spandrel girder is 200cm, and the spandrel girders are arranged according to the interval of 60 cm; the distribution beams are made of 10 cm-10 cm angle steel, the distribution beams are arranged at intervals of 40cm, and the distribution beams and the spandrel beams are firmly welded to form a bearing structure 14; the steel plates are welded to the distribution beams of the load-bearing structure to form the floor of the construction platform.
And 4, adopting a phi 48mm shelf pipe as a fence on three sides of the construction platform, and manufacturing a folding operation door which is opened towards two sides by using the phi 48mm shelf pipe in the direction of one side close to the bridge pier, so that operators can conveniently load and unload the shock-proof steel stop blocks.
And 5, in order to facilitate the positioning of the platform after the crane sends to the pier top, welding a 3mm thick steel plate on the outer side of the operation door as a positioning plate, wherein the positioning plate is perpendicular to the bottom plate, and a steel plate with the width of 10cm is reserved on the outer side of the positioning plate outside the enclosure structure as a lapping plate for the construction platform and the pier top.
Step 6, after the platform is manufactured, the platform is installed on an end steel plate at the top end of a large arm of an automobile crane, a steel plate with the top end thickness of 20mm and the length of 70cm and 60cm is used as a primary platform bearing construction platform, then a bearing beam on the construction platform is hinged with a steel rod bolt at one end of an end plate of the large arm of the crane, the diameter of the steel rod is 60mm, and a steel rod at the other end of the end plate of the large arm of the crane is connected with the bearing beam of the construction platform by adopting a sleeve screw rod for adjusting the level of the construction platform, so that the platform is kept in a level state in the crane conveying process; the connection mode of the end steel plate and the construction platform is as follows:
in the step (2), the connection mode of the steel plate at the end of the large arm of the automobile crane and the construction platform is as follows: when the axis direction of the third sleeve is consistent with the axis direction of the bolt sleeve at the front end of the end steel plate, two screws are respectively inserted into the two third sleeves, the other ends of the screws are respectively screwed into the inner holes of the bolt sleeve at the front end of the end steel plate and serve as shafts for hinging the construction platform and the end steel plate, so that two third sleeves welded at the bottom of the construction platform form a hinging mode with the horizontal screws in the bolt sleeve of the end steel plate; two screws are respectively inserted into two holes of a bolt sleeve at the rear end of an end steel plate at the other end of each screw, then the inner thread of the second sleeve is corresponding to the lower part of the bottom plate, the lower end of the adjustable screw rod downwards penetrates through the first sleeve from the opening of the first sleeve to be screwed into the inner thread of the second sleeve, the inner diameter of the first sleeve is larger than that of the second sleeve, the outer thread at the lower end of the adjustable screw rod is matched with the inner thread of the second sleeve, after the position of the adjustable screw rod is determined, the adjustable screw rod is screwed into a gap between the first sleeve and the adjustable screw rod, and after the adjustable screw rod is screwed in, the adjustable screw rod only rotates along with one direction of the adjustable screw rod, and the adjustable screw rod is reversely rotated to drive the adjustable screw rod to move upwards relative to the first sleeve, so that the horizontal inclination angle of a construction platform and the end steel plate is changed. When the hinged end is used as a fulcrum to rotate the adjusting sleeve on the construction platform, the screw rod is long, only the adjusting sleeve is used for rotating, the screw rod moves up and down, the bottom of the screw rod is tightly connected with the second sleeve, the adjusting sleeve is rotated, the adjustable screw rod can move up and down relative to the first sleeve, and then the horizontal inclination angle between the construction platform and the end steel plate is adjusted. The maximum horizontal inclination angle of the construction platform and the end steel plate is 15 degrees.
And 7, after the construction platform is installed on the primary platform of the large arm of the crane, starting the crane, putting down the construction platform to the ground, adjusting the construction platform to be horizontally connected with the ground by utilizing a screw sleeve structure, manually moving the shock-proof steel stop block to the construction platform by using rollers, arranging a plurality of rollers 19 at the lower end of the shock-proof steel stop block, and fixing four corners of the shock-proof steel stop block with hooks arranged at four corners of a fence of the construction platform by adopting a steel wire rope to prevent the shock-proof steel stop block from sliding on the rollers in the conveying and rising process.
Step 8, arranging 4 operators to enter a construction platform, and lifting the large arm of the automobile crane to the top of the pier provided with the shockproof steel stop block; the locating plate of the construction platform is flush and clung to the groove of the pier top, and the butt plate is lapped on the pier top.
Step 9, arranging a steel pipe on the other side of the bridge pier as an anchor point to fix a manual hoist index, and adjusting the inclination angle of the construction platform through a screw rod sleeve structure to enable a bottom plate far away from one end of the positioning plate to incline upwards so as to facilitate the movement of the shockproof steel stop block into the groove; utilize the roller of shockproof steel dog lower part to slide, slowly drag the recess plane that gets into the pier top with shockproof steel dog, the manual work cooperation is with the crow bar control, guarantees that shockproof steel dog is removed to pre-buried bolt sleeve lower part all the time on the roller, adjusts the direction of shockproof steel dog and pre-buried steel sheet, accomplishes the conveying task that shockproof steel dog got into the working face.
And 10, jacking up the check block by using a mechanical jack, and when the distance from the check block to the embedded steel plate is 5-10cm, aligning the shockproof steel check block with the bolt hole of the embedded part by using a phi 20 steel pipe with the length of 35cm, and then screwing all bolts, so that the level of the shockproof steel check block is ensured as much as possible, and the bolt is prevented from being misplaced.
And 11, after screwing, the mechanical roof falls down for 3-4mm. After the shockproof steel stop block is self-leveling, the jack is lifted upwards until the shockproof steel stop block is pushed to intersect with the embedded steel plate. And in the pushing-up process of the jack, the bolt is continuously screwed.
And 12, tightly attaching the shockproof steel block steel plate and the embedded steel plate, and screwing the bolts by using a spanner.
And 13, filling gaps between the shockproof steel stop block and the pre-buried steel plate by using the steel wedge plate subjected to anti-corrosion treatment after the stop block is installed, and selecting a proper wedge plate according to the size of the gaps and welding the wedge plate with the steel plate firmly when the thickness and the gaps are different.
Claims (8)
1. The utility model provides a construction platform of bridge shock-proof steel dog hoist and mount which characterized in that: the construction platform comprises a bottom plate, a fence and an operation door, wherein a positioning plate vertical to the bottom plate is fixedly arranged below the bottom plate outside the operation door, and a butt strap with the width not less than 10cm is reserved on the bottom plate outside the positioning plate and used for being lapped with a pier top; one end of the construction platform bottom plate is hinged with one end of the end steel plate at the top end of the automobile crane boom, and the other end of the construction platform bottom plate is connected with the other end of the end steel plate through a screw rod sleeve structure capable of adjusting the horizontal height of the construction platform bottom plate;
the bottom plate is far away from one end of the positioning plate and is provided with two symmetrically arranged first sleeves, the first sleeves penetrate through the bottom plate of the construction platform, the upper end faces of the first sleeves are parallel to the bottom plate, adjustable screw rods with outer threads are respectively inserted into the two first sleeves, the outer diameter of each adjustable screw rod is smaller than the inner diameter of the corresponding first sleeve, the upper end of each adjustable screw rod is provided with an adjusting sleeve which can drive the corresponding adjustable screw rod to rotate only in one direction, each adjusting sleeve is provided with an external thread and an internal thread, the external threads of each adjusting sleeve are matched with the internal threads of the corresponding first sleeve, the internal threads of each adjusting sleeve are buckled with the external threads of the corresponding adjustable screw rod, and the adjusting sleeve is screwed into a gap between the corresponding first sleeve and each adjustable screw rod; the front end and the rear end of the end steel plate of the large arm of the automobile crane are respectively provided with a bolt sleeve penetrating through the end steel plate, each bolt sleeve is internally provided with an internal thread, both ends of each bolt sleeve are screwed into a screw rod, the screw rods are provided with external threads matched with the internal threads of the bolt sleeves at the screwed-in positions, the other ends of the two screw rods screwed into the front ends of the end steel plate are respectively inserted into sleeve supports at the lower ends of the two second sleeves, the adjustable screw rods are screwed into the second sleeves, and the external threads of the adjustable screw rods are matched with tapping holes in the second sleeves to form a screw rod sleeve structure; two symmetrical hinge brackets are welded on two sides of the lower end face of the bottom plate close to the positioning plate, the lower end of each hinge bracket is provided with a third sleeve, and the other ends of two screw rods at the rear end of the end steel plate are respectively inserted into the two third sleeves to form hinge; the bottom plate of the construction platform is hinged with a bolt at one end of the large arm of the automobile crane, the other end of the construction platform is matched with the bottom plate to be connected with the bottom plate through a screw rod sleeve structure, and the adjusting sleeve is rotated to adjust the upper and lower positions of the pier facing side of the bottom plate, so that the horizontal inclination angle of the construction platform is adjusted; the adjusting sleeve is provided with a handle;
the construction platform bottom plate includes bearing structure and steel sheet, and bearing structure manufacturing method is: two square steel with the length of 10cm is adopted as a spandrel girder, the spandrel girder is 200cm long and is arranged according to the interval of 60 cm; the distribution beams are made of 10 cm-10 cm angle steel, the spacing is arranged according to 40cm, and the distribution beams and the spandrel girder are firmly welded to form a bearing structure; the steel plates are welded to the distribution beams of the load-bearing structure.
2. A method for installing a bridge vibration-proof steel block by using the construction platform for hoisting the bridge vibration-proof steel block according to claim 1, which is characterized in that: the method comprises the following steps: (1) Taking an embedded steel plate which is anchored with the shock-proof steel stop block and has the same size and the same bolt hole position as a bottom die, and pouring and embedding along with concrete, wherein the embedded steel plate adopts a double-bolt sleeve structure; (2) The construction platform is arranged on the end steel plate on the big arm of the automobile crane, one end of the bottom plate, which is close to the positioning plate, is hinged with a screw rod screwed in the bolt of the end steel plate, the bottom plate, which is far away from one end of the positioning plate, is connected with the front end of the end steel plate through a screw rod sleeve structure, and the screw rod sleeve is adjusted to adjust the horizontal inclination angle of the bottom plate and the end steel plate; (3) Firstly, moving a construction platform to the ground through a large arm of an automobile crane, manually moving a shock-proof steel stop block from an opened operation door to a bottom plate of the construction platform, and arranging a plurality of rollers at the lower part of the shock-proof steel stop block; (4) Arranging an operation platform for installing an anti-vibration steel stop block on the pier top by an operator, lifting a large arm of an automobile crane to the pier top for installing the anti-vibration steel stop block, enabling a positioning plate of a construction platform to be tightly attached to the plane of a groove of the pier top to realize positioning, enabling the lapping plate to be lapped on the pier top, enabling one end of the construction platform to move upwards through adjustment of a screw rod sleeve structure, enabling a bottom plate of the construction platform to form an inclined angle with the plane of the groove of the pier top, and enabling the anti-vibration steel stop block to conveniently enter the plane of the groove of the pier top by utilizing rolling rod sliding at the lower part of the anti-vibration steel stop block; (5) An operator slowly pulls the shockproof steel stop block into the groove plane of the pier top by utilizing the inclination angle, so that the shockproof steel stop block is ensured to move to the lower part of the embedded bolt sleeve, the directions of the shockproof steel stop block and the embedded steel plate are regulated, and the conveying task of the shockproof steel stop block into the working surface is completed; (6) And adjusting an alignment bolt of the shockproof steel stop block and the embedded steel plate, and compressing and installing the shockproof steel stop block through the bolt.
3. The method for installing the bridge vibration-proof steel stop block according to claim 2, wherein the method comprises the following steps: in the step (2), the connection mode of the steel plate at the end of the large arm of the automobile crane and the construction platform is as follows: when the axis direction of the third sleeve is consistent with the axis direction of the bolt sleeve at the front end of the end steel plate, two screws are respectively inserted into the two third sleeves, the other ends of the screws are respectively screwed into the inner holes of the bolt sleeve at the front end of the end steel plate and serve as shafts for hinging the construction platform and the end steel plate, so that two third sleeves welded at the bottom of the construction platform form a hinging mode with the horizontal screws in the bolt sleeve of the end steel plate; two screws are respectively inserted into the two sleeve supports, the other end of each screw is screwed into two holes of a bolt sleeve at the rear end of the end steel plate, then the lower end of the adjustable screw is downwards inserted into the inner screw of the second sleeve from the opening of the first sleeve, the inner diameter of the first sleeve is larger than that of the second sleeve, the outer screw at the lower end of the adjustable screw is matched with the inner screw of the second sleeve, after the position of the adjustable screw is determined, the adjusting sleeve is screwed into a gap between the first sleeve and the adjustable screw, and the adjustable screw only rotates along with the adjusting sleeve in one direction; and when the adjusting sleeve is rotated on the construction platform by taking one hinged end as a fulcrum, the adjustable screw rod moves up and down relative to the first sleeve, so that the horizontal inclination angle between the construction platform and the end steel plate is adjusted, and the maximum horizontal inclination angle between the construction platform and the end steel plate is 15 degrees.
4. The method for installing the bridge vibration-proof steel stop block according to claim 2, wherein the method comprises the following steps: four corners of the shock-proof steel stop block are fixedly connected with hooks arranged at four corners of the fence of the construction platform by adopting a steel wire rope, so that the shock-proof steel stop block is prevented from sliding on the rolling rod in the conveying and rising process.
5. The method for installing the bridge vibration-proof steel stop block according to claim 2, wherein the method comprises the following steps: one end of the embedded steel plate is embedded into the concrete by adopting a sleeve bolt when the embedded steel plate is fixed by the anti-vibration steel stop block, the other end of the embedded steel plate is exposed to be used for being connected with the anti-vibration steel stop block, and the bolt sleeve on one exposed side of the steel plate is exposed by 2-3cm, so that the concrete pouring of the beam body is finished, the bolt installation of the anti-vibration steel stop block is conveniently fixed after the die is removed, and the accurate alignment of the bolt hole of the anti-vibration steel stop block and the bolt sleeve is also convenient.
6. The method for installing the bridge vibration-proof steel stop block according to claim 2, wherein the method comprises the following steps: the check block is jacked up by using a mechanical jack, when the distance from the check block to the embedded steel plate is 5-10cm, a phi 20 steel pipe with the length of 35cm can be used for aligning the shockproof steel check block with the bolt hole of the embedded part, then all bolts are screwed, so that the level of the shockproof steel check block is ensured as much as possible, and the bolt is prevented from being misplaced; after the bolts are screwed on, the mechanical jack falls down for 3-4mm firstly, after the shockproof steel stop block is self-leveling, the jack is lifted up until the shockproof steel stop block is pushed to intersect with the embedded steel plate, and the bolts are continuously screwed up in the pushing process of the jack.
7. The method for installing the bridge vibration-proof steel stop block according to claim 2, wherein the method comprises the following steps: the gap between the shockproof steel stop block and the embedded steel plate is filled with the steel wedge plate which is used for anti-corrosion treatment after the shockproof steel stop block is installed, and when the thickness and the gap are different, the proper wedge plate is selected according to the size of the gap and is firmly welded with the steel plate.
8. The method for installing the bridge vibration-proof steel stop block according to claim 2, wherein the method comprises the following steps: the specific installation method in the step (6) is as follows: manually aligning the pre-buried bolt sleeve with the bolt hole of the anti-vibration steel stop block, penetrating the bolts, firstly, feeding 2-3 wires on the bolts one by one, withdrawing the rolling rod under the anti-vibration steel stop block, then lifting the anti-vibration steel stop block to the pre-buried steel plate at the beam bottom by using a mechanical jack, closely attaching the anti-vibration steel stop block to the pre-buried steel plate, completing the alignment adjustment of the anti-vibration steel stop block and the pre-buried steel plate bolt, and forcefully pressing the pre-buried steel plate by using the flat head bolt to complete the installation work of the anti-vibration steel stop block until all the bolts reach the designed torsion.
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| JPS53599A (en) * | 1976-06-24 | 1978-01-06 | Ishikawajima Harima Heavy Ind Co Ltd | Construction vehicle |
| JPH0940381A (en) * | 1995-07-28 | 1997-02-10 | Toyota Autom Loom Works Ltd | Bucket for vehicle for high lift work |
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