CN111764289A - Novel cast-in-place suspension bracket with overhanging light structure and use method thereof - Google Patents
Novel cast-in-place suspension bracket with overhanging light structure and use method thereof Download PDFInfo
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- CN111764289A CN111764289A CN202010589284.8A CN202010589284A CN111764289A CN 111764289 A CN111764289 A CN 111764289A CN 202010589284 A CN202010589284 A CN 202010589284A CN 111764289 A CN111764289 A CN 111764289A
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
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Abstract
The invention discloses a novel cast-in-place suspension bracket with a cantilever light structure and a use method thereof, wherein an L-shaped bearing pipe sleeve is designed aiming at the special shape of the top corner of a U beam and is arranged on a tripod to be used as a support system of the whole suspension bracket, the tripod is limited and supported, the vertical and horizontal stress is transmitted to the U beam, the tripod is detachably fixed on the outer side of a U beam web plate to be used for laying a bottom die and pouring a bridge deck plate, after the bridge deck plate is poured, the L-shaped bearing pipe and the tripod can be detached only by unscrewing a limiting bolt and cutting a connecting rib, the investment of integral material equipment is small, meanwhile, a lifting rope is introduced to protect the tripod in the installation process and pull and recover the tripod in the detachment process, the whole construction process is convenient, flexible and efficient, and the legal requirements that countries such as Malaysia and the like do not allow hanging baskets, the method can be suitable for bridge construction in complex and dangerous terrains, and the safety of construction operation is obviously improved.
Description
Technical Field
The invention relates to the technical field of bridge construction. More particularly, the invention relates to a novel cast-in-place suspension bracket with a cantilever light structure and a use method thereof.
Background
The conventional cast-in-place support is mainly formed by using profile steel as an upper bearing beam and a lower bearing beam which are connected through a hanging rod, a distribution beam and a bottom die are paved on the lower bearing beam for cast-in-place, while a tripod is mainly formed by welding flat iron and open steel in the traditional foreign tripod like Malaysia, the tripod is fixed to a U-shaped beam web plate through an expansion bolt, and the distribution beam and the bottom die are paved on the tripod for cast-in-place. The conventional cast-in-place supports are constructed by using an aerial ladder vehicle and a crane in the installation and dismantling processes, the construction efficiency is low, a hanging basket is not allowed to be used for high-altitude operation according to Malaysia law, and part of bridge construction areas are located in mountainous areas and span the existing expressway and MRT due to the limitation of terrain conditions of the mountainous areas, so that the aerial ladder vehicle and crane construction cannot be met. The upper structure of the bridge ramp in Malaysia countries is mainly a prefabricated U-shaped beam with a notch at the top angle, the boundary beam is designed without flange plates, and the bridge deck is cast on the U-shaped beam in situ, so that the construction of a cast-in-situ support is carried out aiming at a specific U-shaped beam structure, the requirements of devices such as hanging baskets, cranes and the like are not used, and the problem is solved.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a novel overhanging light-structure cast-in-place suspension bracket and a using method thereof, and the technical problems of inconvenient installation and removal and low construction efficiency of the existing cast-in-place suspension bracket are solved.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a new cantilevered lightweight construction cast in place suspension bracket comprising:
the L-shaped bearing pipes are respectively arranged at the top corners of the U beams and are uniformly distributed along the length direction of the U beams, notches are formed in the top corners of the U beams outwards along the length direction of the U beams, each L-shaped bearing pipe is provided with a horizontal part and a vertical part, the horizontal part of each L-shaped bearing pipe is perpendicular to the length direction of the U beam, one end, far away from the vertical part, of each L-shaped bearing pipe is located in each notch, each vertical part is provided with a through hole in a vertical direction, the length of each through hole is slightly larger than the thickness of the bridge deck slab poured on the U beam, a bolt hole communicated with the through hole is horizontally formed in the side wall, located above the thickness of the bridge;
the triangular supports are respectively arranged corresponding to one L-shaped bearing pipe and comprise a first supporting rod, a second supporting rod and a third supporting rod which are sequentially and fixedly connected, wherein the second supporting rod is horizontally arranged, the first supporting rod is vertically arranged, the upper end of the first supporting rod extends upwards to the outside of the second supporting rod and then penetrates out of the through hole upwards, the third supporting rod is fixedly connected with the lower end of the first supporting rod, and a bearing block is welded on the side wall of the upper end of the first supporting rod, which is positioned outside the through hole;
the door-shaped embedded ribs are vertically arranged on one end, close to the L-shaped bearing pipe, of the upper surface of the U beam respectively and are uniformly distributed along the length direction of the U beam, two ends of each door-shaped embedded rib are embedded and fixed in the U beam, and the plane direction of each door-shaped embedded rib is the same as the width direction of the U beam;
the connecting ribs are respectively arranged corresponding to one L-shaped bearing pipe, the upper ends of the connecting ribs are first U-shaped bent portions which are horizontally arranged with notch directions facing the U-shaped beam, two ends of each first U-shaped bent portion are bent downwards twice to form second U-shaped bent portions with notch directions back to the U-shaped beam, and each first supporting rod is located at the bottom of a notch of one first U-shaped bent portion;
and the horizontal arrangement and two ends of each tensile steel bar are respectively inserted into the notches of the two second U-shaped bent parts of one connecting rib, and each tensile steel bar is also respectively positioned in the notches of the door-shaped pre-embedded ribs at the corresponding positions on the U-shaped beam.
Preferably, the side wall of the first support rod above the bearing block is further provided with a pair of through holes, and a safety pin is arranged in the pair of through holes.
Preferably, the pre-buried muscle of door type corresponds every splice bar and is provided with 2 at least, with every the tensile reinforcing bar that the splice bar corresponds penetrates simultaneously to 2 in the notch of the pre-buried muscle of door type and the notch of two second U-shaped bends of splice bar.
Preferably, the bottom of the tripod is further provided with a supporting leg, one end of the supporting leg is fixedly connected with the lower end of the first supporting rod, and the other end of the supporting leg is abutted against the surface of the web plate of the U-shaped beam.
Preferably, the tripod is machined and formed by adopting square steel with the length of 50mm 25mm 3mm, the bearing block is flat iron with the length of 50mm 20mm 6mm, the L-shaped bearing pipe is square steel with the length of 65mm 35mm 3mm, and the length of the limiting bolt is 25 mm.
The invention also provides a use method of the novel cast-in-place suspension bracket with the overhanging light structure, which comprises the following steps:
s1, uniformly arranging a plurality of door-shaped embedded ribs on one side, close to a position to be installed, of the upper surface of the U beam along the length direction of the U beam, wherein the door-shaped embedded ribs are vertically arranged and are located in the same plane direction as the width direction of the U beam, a notch formed outwards is formed in the top angle of the U beam, and the notch extends along the length direction of the U beam;
s2, respectively binding a lifting rope on the door-shaped embedded rib corresponding to the position to be installed of each tripod, binding and fixing the other end of the lifting rope and one end of each tripod far away from the U-beam, sleeving an L-shaped bearing pipe on the upper end of each tripod and fixing the L-shaped bearing pipe and the tripod relatively, integrally suspending the L-shaped bearing pipe and the tripod to the outer side of a web plate of the U-beam, and vertically installing the L-shaped bearing pipe at the vertex angle of the U-beam, wherein the horizontal part of the L-shaped bearing pipe is vertical to the length direction of the U-beam, and one end of the horizontal part far away from the vertical part is positioned in the notch and is abutted against the;
s3, hooking the vertical part of the L-shaped bearing pipe by using the first U-shaped bending part of the connecting rib, inserting a tensile steel bar into the second U-shaped bending part of the connecting rib, inserting the tensile steel bar into the notch of the door-shaped embedded rib at the corresponding position, and respectively and tightly contacting the L-shaped bearing pipe with the connecting rib, the tensile steel bar with the door-shaped embedded rib, so as to provide a supporting force in the horizontal direction for the L-shaped bearing pipe;
s4, arranging a row of distribution beams on the second support rods of all the tripods at intervals, wherein the length direction of the distribution beams is consistent with that of the U-shaped beams, then paving bottom moulds on all the distribution beams, starting to pour a bridge deck after the bottom moulds are paved, and arranging a protection area for the L-shaped bearing pipes during pouring to prevent cement slurry from entering the L-shaped bearing pipes;
s5, after the bridge deck slab is poured, sequentially removing the bottom die and the distribution beam, then removing the tripod and the L-shaped bearing pipe from each other, lowering the tripod by using the lifting ropes to enable the tripod to be completely separated from the L-shaped bearing pipe, then drawing the tripod from the outer side of the bridge deck slab, taking back the tripod, cutting all connecting ribs, taking out all the L-shaped bearing pipes, and finally recovering all the lifting ropes.
Preferably, in step S1, when the L-shaped bearing pipe is sleeved on the upper end of the tripod and fixed relatively, the first support rod of the tripod is vertically extended upward through the through hole of the L-shaped bearing pipe until the bearing block is located on the L-shaped bearing pipe, then the position of the tripod is adjusted to make the bearing block fully contact with the top surface of the L-shaped bearing pipe, then the limit bolt is screwed down, when the tripod is released from the L-shaped bearing pipe, the limit bolt is unscrewed, and then the position of the tripod is adjusted to make the first support rod with the bearing block move downward out of the through hole of the L-shaped bearing pipe.
Preferably, a pair of through holes are formed in the side wall of the tripod above the bearing block, a safety pin penetrates through the through holes, and when the tripod and the L-shaped bearing pipe are released from fixing, the safety pin is pulled out first and then the limiting bolt is unscrewed.
Preferably, when the protective area is set for the L-shaped bearing pipe in step S4, a PVC pipe is sleeved on the L-shaped bearing pipe, and then geotextile is filled in the PVC pipe.
Preferably, before the distribution beam is arranged and the bottom die is laid, a lifting lug is welded at each end of each distribution beam, a hole is formed in the outer side of the bottom die, a lifting rope is connected in each lifting lug and the hole in the bottom die, the other end of each lifting rope is fixedly connected with a door-shaped pre-buried rib in the corresponding position, when the bottom die and the distribution beam are dismounted, the bottom die and the distribution beam are sequentially pulled outwards along the width direction of the U-shaped beam until completely leaving the bottom of the bridge deck, and then the bottom die and the distribution beam are pulled to the bridge deck to be recycled.
The invention at least comprises the following beneficial effects: the invention relates to a novel cast-in-place suspension bracket with a cantilever light structure and a using method thereof, wherein an L-shaped bearing pipe is designed aiming at the special shape of the top corner of a U-shaped beam to be used as a supporting system of the whole suspension bracket, the triangular bracket has the functions of limiting and supporting and transmits the stress in the vertical direction and the horizontal direction to the U-shaped beam, a through hole and a limiting bolt are arranged on the L-shaped bearing pipe, the triangular bracket is detachably fixed at the outer side of a web plate of the U-shaped beam to be used for laying a bottom die and pouring a bridge deck plate, after the pouring of the bridge deck plate is finished, the L-shaped bearing pipe and the triangular bracket can be detached only by unscrewing the limiting bolt and cutting a connecting rib, the investment of integral material equipment is small, meanwhile, a lifting rope is introduced in the construction process to prevent the triangular bracket from accidentally falling in the installation process, the, the technical scheme also solves the legal requirement that the country such as Malaysia does not allow the hanging basket to be used for high-altitude operation pertinently, can adapt to bridge construction of complex and dangerous terrains, and obviously improves the safety of construction operation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
FIG. 2 is a side view of the present invention arranged on a U-beam;
FIG. 3 is an enlarged structural view taken at A in FIG. 1 in accordance with the present invention;
FIG. 4 is a top view of the tie bar of the present invention;
FIG. 5 is a side view structural view of the upper end of the first support bar of the present invention;
fig. 6 is a front view structural view of the L-shaped bearing pipe of the present invention.
The specification reference numbers indicate: 1. u roof beam, 2, notch, 3, decking, 4, horizontal part, 5, vertical portion, 6, perforating hole, 7, bolt hole, 8, spacing bolt, 9, the tripod, 10, first bracing piece, 11, second bracing piece, 12, third bracing piece, 13, bearing block, 14, door type pre-buried muscle, 15, splice bar, 16, first U-shaped flexion, 17, second U-shaped flexion, 18, tensile bar, 19, to perforation, 20, safety pin, 21, supporting legs, 22, lifting rope, 23, distribution beam, 24, die block, 25, protection zone, 26, lug.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the present invention provides a novel cast-in-place suspension bracket with a cantilevered light structure, comprising:
the bearing device comprises a plurality of L-shaped bearing pipes, a plurality of L-shaped bearing pipes and a plurality of limiting bolts, wherein the L-shaped bearing pipes are respectively arranged at the top corners of a U beam 1 and are uniformly distributed along the length direction of the U beam 1, notches 2 are formed in the top corners of the U beam 1 outwards along the length direction of the U beam 1, each L-shaped bearing pipe is provided with a horizontal part 4 and a vertical part 5, the horizontal part 4 of each L-shaped bearing pipe is perpendicular to the length direction of the U beam 1, one end, far away from the vertical part 5, is positioned in the notch 2, the vertical part 5 is provided with a through hole 6 in a vertical direction, the length of each vertical part is slightly larger than the thickness of a bridge deck 3 poured on the U beam 1, a bolt hole 7 communicated with the through;
the triangular supports 9 are respectively arranged corresponding to one L-shaped bearing pipe, each triangular support 9 comprises a first supporting rod 10, a second supporting rod 11 and a third supporting rod 12 which are fixedly connected in sequence, wherein the second supporting rod 11 is horizontally arranged, the first supporting rod 10 is vertically arranged, the upper end of the first supporting rod extends upwards to the outside of the second supporting rod 11 and then penetrates out of the through hole 6 upwards, the third supporting rod 12 is fixedly connected with the lower end of the first supporting rod 10, and a bearing block 13 is welded on the side wall of the upper end of the first supporting rod 10, which is positioned outside the through hole 6;
the door-shaped embedded ribs 14 are vertically arranged on one end, close to the L-shaped bearing pipe, of the upper surface of the U beam 1 and are uniformly distributed along the length direction of the U beam 1, two ends of each door-shaped embedded rib 14 are embedded and fixed in the U beam 1, and the plane direction of each door-shaped embedded rib 14 is the same as the width direction of the U beam 1;
the connecting ribs 15 are respectively arranged corresponding to one L-shaped bearing pipe, the upper ends of the connecting ribs 15 are first U-shaped bent portions 16 which face the U-shaped beam 1 in the notch direction and are horizontally arranged, two ends of each first U-shaped bent portion 16 are bent downwards twice to form second U-shaped bent portions 17 with notch directions back to the U-shaped beam 1, and each first supporting rod 10 is located at the bottom of a notch of each first U-shaped bent portion 16;
the tensile steel bars 18 are horizontally arranged, two ends of each tensile steel bar 18 are respectively inserted into the notches of the two second U-shaped bent portions 17 of one connecting rib 15, and each tensile steel bar 18 is also respectively positioned in the notch of the door-shaped embedded rib 14 at the corresponding position on the U-shaped beam 1.
When the novel cast-in-place suspension bracket with the overhanging light structure is used, the concrete steps are as follows:
s1, a plurality of door-shaped embedded ribs are evenly arranged on one side, close to the position to be installed, of the upper surface of the U beam along the length direction of the U beam, the door-shaped embedded ribs are vertically arranged and located in the same plane direction as the width direction of the U beam, a notch formed outwards is formed in the top angle of the U beam, and the notch extends along the length direction of the U beam.
S2, sleeving the L-shaped bearing pipe at the upper end of the tripod and fixing the L-shaped bearing pipe relatively, specifically, vertically and upwards penetrating through a through hole of the L-shaped bearing pipe until the bearing block is located on the L-shaped bearing pipe, then adjusting the position of the tripod to enable the bearing block to be just placed at the top end of the L-shaped bearing pipe, then screwing a limiting bolt to limit the tripod, ensuring that the L-shaped bearing pipe is in full contact with the bearing block on the tripod to play a force transfer role, then integrally suspending the L-shaped bearing pipe and the tripod to the outer side of a web plate of the U-shaped beam, and vertically installing a plurality of L-shaped bearing pipes at the top angle of the U-shaped beam, wherein the horizontal part of the L-shaped bearing pipe is vertical to the length direction of the U-shaped beam, and one end, far away from the vertical part, of.
S3, hooking the vertical part of the L-shaped bearing pipe by the first U-shaped bending part of the connecting rib, inserting a tensile steel bar into the second U-shaped bending part of the connecting rib, inserting the tensile steel bar into the notch of the door-shaped embedded rib at the corresponding position, and respectively and tightly contacting the L-shaped bearing pipe and the connecting rib, the tensile steel bar and the connecting rib, and the tensile steel bar and the door-shaped embedded rib, thereby providing the L-shaped bearing pipe with supporting force in the horizontal direction.
S4, arranging a row of distribution beams on the second support rods of all the tripods at intervals, enabling the length direction of the distribution beams to be consistent with that of the U-shaped beams, then laying bottom molds on all the distribution beams, starting to pour the bridge deck after the bottom molds are laid, and taking protective measures for the L-shaped bearing pipes to prevent cement paste from entering the L-shaped bearing pipes during pouring.
S5, after the bridge deck slab is poured, sequentially removing the bottom die and the distribution beam, then removing the tripod and the L-shaped bearing pipes, recycling the tripod, then cutting all the connecting ribs, and taking out all the L-shaped bearing pipes.
The invention relates to a novel cast-in-situ hanging bracket with an overhanging light structure, which is characterized in that an L-shaped bearing pipe is designed as a supporting system of the whole hanging bracket aiming at the special shape of the top corner of a U-shaped beam, a through hole and a limiting bolt are arranged on the L-shaped bearing pipe, a tripod is detachably fixed on the outer side of a U-shaped web plate for laying a bottom die and pouring a bridge deck plate, the L-shaped bearing pipe plays a limiting and supporting role on the tripod, then the stress in the vertical direction and the horizontal direction is transmitted to the U-shaped beam, a connecting rib, a tensile steel bar and a door-shaped embedded rib are remained in the bridge deck plate after the pouring of the bridge deck plate is finished, so that the internal shearing strength of the bridge deck plate is enhanced, the door-shaped embedded rib is matched with the connecting rib and the tensile steel bar to play a transverse supporting and stabilizing role on the L-shaped bearing pipe and, The tripod has the advantages of small investment of overall material equipment, simple and flexible installation and disassembly and high construction operation efficiency.
In another technical solution, as shown in fig. 1, 2, 3, and 5, a pair of through holes 19 are further formed on a side wall of the first support bar 10 above the bearing block 13, and a safety pin 20 is commonly inserted in the pair of through holes 19.
The safety pin is additionally arranged at the top of the tripod and is used for providing double safety of vertical supporting force for the tripod when the tripod is hung and disassembled during installation, and the hidden danger that the whole tripod leaves a through hole of the L-shaped bearing pipe due to the fact that the limiting bolt is not locked or the bearing block is not completely contacted with the top of the L-shaped bearing pipe to slide is avoided.
In another technical solution, as shown in fig. 1 and 3, at least 2 tensile bars 18 corresponding to each of the connection bars 15 are provided corresponding to the gate-type embedded bars 14, and penetrate into the notches of the 2 gate-type embedded bars 14 and the notches of the two second U-shaped bent portions 17 of the connection bars 15 at the same time. And the stress at two ends of one tensile steel bar is balanced respectively by arranging two door-shaped embedded bars.
In another technical solution, as shown in fig. 1, a supporting leg 21 is further disposed at the bottom of the tripod 9, one end of the supporting leg 21 is fixedly connected to the lower end of the first supporting rod 10, and the other end of the supporting leg abuts against the surface of the web plate of the U-beam 1.
The supporting legs are welded at the bottom of the tripod and used for adjusting the transverse gradient and further stabilizing the tripod.
In another technical scheme, as shown in fig. 1 and 3, the triangular frame 9 is formed by machining a square steel with a length of 50mm × 25mm × 3mm, the bearing block 13 is a flat iron with a length of 50mm × 20mm × 6mm, the L-shaped bearing pipe is a square steel with a length of 65mm × 35mm × 3mm, and the limit bolt 8 is 25mm long.
Utilize the mouth style of calligraphy steel machine-shaping to provide the rigidity holding power, be favorable to realizing the holistic lightweight of the light structure cast-in-place underslung of novel encorbelmenting, be convenient for shift transportation, position adjustment, and mouth style of calligraphy steel, band iron, spacing bolt specification are common, and convenient for material collection is favorable to reduction in production cost, improves the efficiency of construction.
The invention also provides a use method of the novel cast-in-place suspension bracket with the overhanging light structure, which is shown by combining the drawings 1 to 6 and comprises the following steps:
s1, uniformly arranging a plurality of door-shaped embedded ribs 14 along the length direction of the U beam 1 on one side, close to the position to be installed, of the upper surface of the U beam 1, wherein the door-shaped embedded ribs 14 are vertically arranged, the plane direction of the door-shaped embedded ribs 14 is the same as the width direction of the U beam 1, a notch 2 formed outwards is formed in the top angle of the U beam 1, and the notch 2 extends along the length direction of the U beam 1;
s2, respectively binding a lifting rope 22 on the door-shaped embedded rib 14 corresponding to the position to be installed of each tripod 9, binding and fixing the other end of the lifting rope 22 and one end of each tripod 9 far away from the U-shaped beam 1, sleeving an L-shaped bearing pipe on the upper end of each tripod 9 and fixing the L-shaped bearing pipe and the tripod 9 relatively, integrally suspending the L-shaped bearing pipe and the tripod 9 to the outer side of a web plate of the U-shaped beam 1, and vertically installing the L-shaped bearing pipe at the top angle of the U-shaped beam 1, wherein the horizontal part 4 of the L-shaped bearing pipe is vertical to the length direction of the U-shaped beam 1, and one end of the horizontal part 4 far away from the vertical part 5 is positioned in the notch 2;
s3, hooking the vertical part 5 of the L-shaped bearing pipe by using the first U-shaped bending part 16 of the connecting rib 15, inserting a tensile steel bar 18 into the second U-shaped bending part 17 of the connecting rib 15, inserting the tensile steel bar 18 into the notch of the door-shaped embedded rib 14 at the corresponding position, and respectively and tightly contacting the L-shaped bearing pipe and the connecting rib 15, the tensile steel bar 18 and the door-shaped embedded rib 14, so that a supporting force in the horizontal direction is provided for the L-shaped bearing pipe;
s4, arranging a row of distribution beams 23 on the second support rods 11 of all the tripods 9 at intervals, wherein the length direction of the distribution beams 23 is consistent with that of the U-shaped beams 1, then paving bottom moulds 24 on all the distribution beams 23, starting to pour the bridge deck 3 after the bottom moulds 24 are paved, and arranging protection areas 25 on the L-shaped bearing pipes during pouring to prevent cement slurry from entering the L-shaped bearing pipes;
s5, after the bridge deck 3 is poured, the bottom die 24 and the distribution beam 23 are sequentially removed, the triangular support 9 and the L-shaped bearing pipe are released from fixing, the triangular support 9 is placed downwards by the lifting rope 22 to be completely separated from the L-shaped bearing pipe, then the triangular support 9 is pulled and taken back from the outer side of the bridge deck, all the connecting ribs 15 are cut, all the L-shaped bearing pipes are taken out, and finally all the lifting rope 22 is recovered.
Utilize L type bearing pipe detachably installation fixed suspension before pouring the decking, and set up the protection zone to L type bearing pipe, predetermine the lifting rope for the tripod in the installation and prevent that the tripod in the installation from accidentally dropping in the installation, the lifting rope can select the nylon rope, cut the splice bar after the decking is pour, unscrew spacing bolt and remove the fixed to the tripod, it pulls the tripod to leave the bottom of decking to promote the recovery again to launch the lifting rope, whole work progress is convenient, it is nimble, high-efficient, the legal requirement that countries such as malaysia do not allow to use the hanging flower basket to carry out high altitude construction has been solved pertinently, can adapt to the bridge construction of complicated, dangerous topography, the security that is showing and is improving construction operation.
In another technical solution, as shown in fig. 1, 2, and 3, in step S1, when the L-shaped bearing pipe is sleeved on the upper end of the tripod 9 and fixed relatively, the first support rod 10 of the tripod 9 is vertically extended upward through the through hole 6 of the L-shaped bearing pipe until the bearing block 13 is located on the L-shaped bearing pipe, then the position of the tripod 9 is adjusted so that the bearing block 13 is in full contact with the top surface of the L-shaped bearing pipe, then the limit bolt 8 is tightened, and when the tripod 9 and the L-shaped bearing pipe are released from being fixed, the limit bolt 8 is firstly unscrewed, and then the position of the tripod 9 is adjusted so that the first support rod 10 with the bearing block 13 is moved downward out of the through hole 6 of the L-shaped bearing pipe.
Spacing bolt is before screwing up, and bearing block and first bracing piece can walk smoothly in the thru hole, sets up bearing block cooperation spacing bolt on horizontal through first bracing piece surface, make the bearing block can transmit the atress of tripod to L type bearing pipe completely, just can adjust the horizontal displacement of tripod according to spacing bolt's the degree of screwing up, and bolt structure installation dismantlement is convenient.
In another technical scheme, as shown in fig. 1, 2, 3 and 5, a pair of through holes 19 are formed in the side wall of the tripod 9 above the bearing block 13, a safety pin 20 is inserted into the through holes 19, and when the tripod 9 and the L-shaped bearing pipe are released from being fixed, the safety pin 20 is pulled out and then the limit bolt 8 is unscrewed.
The safety pin is additionally arranged at the top of the tripod and is used for double safety of stress when the tripod is hung and detached in the mounting stage, the hidden danger that the whole tripod falls due to the fact that the limit bolt is not locked and the bearing block is not completely contacted with the top of the L-shaped bearing pipe to slide is avoided, and if the tripod moves downwards in advance, the two ends of the safety pin just abut against the top surface of the L-shaped bearing pipe to bear the gravity of the tripod.
In another technical solution, as shown in fig. 1 and 3, when the protection area 25 is provided for the L-shaped load-bearing pipe in step S4, a PVC pipe is sleeved on the L-shaped load-bearing pipe, and then geotextile is filled in the PVC pipe.
Set up the PVC pipe and keep apart sealed around L type bearing pipe when pouring the decking, avoid grout contact L type bearing pipe, influence follow-up dismantlement work, set up the PVC pipe simultaneously and make and upwards take out L type bearing pipe from the PVC intraductal when dismantling L type bearing pipe, construction convenience is swift.
In another technical scheme, as shown in fig. 1 and 2, before the distribution beams 23 are arranged and the bottom die 24 is laid, two lifting lugs 26 are welded at two ends of each distribution beam 23, holes are formed in the outer side of the bottom die 24, a lifting rope 22 is connected in each lifting lug 26 and the hole in the bottom die 24, the other end of each lifting rope 22 is fixedly connected with a corresponding gate-shaped embedded rib 14, when the bottom die 24 and the distribution beams 23 are disassembled, the bottom die 24 and the distribution beams 23 are sequentially pulled outwards along the width direction of the U-shaped beam 1 by the lifting ropes 22 until completely leaving the bottom of the bridge deck 3, and then pulled onto the bridge deck 3 to recover the bottom die 24 and the distribution beams 23.
The bottom die and the distribution beam are also dismantled by the lifting ropes, so that the operation is convenient, the construction cost is low, and the method is particularly suitable for bridge construction engineering of countries such as Malaysia and the like with laws that use of cranes and hanging baskets is forbidden.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. Novel cast-in-place outrigger of light structure encorbelments, a serial communication port, include:
the L-shaped bearing pipes are respectively arranged at the top corners of the U beams and are uniformly distributed along the length direction of the U beams, notches are formed in the top corners of the U beams outwards along the length direction of the U beams, each L-shaped bearing pipe is provided with a horizontal part and a vertical part, the horizontal part of each L-shaped bearing pipe is perpendicular to the length direction of the U beam, one end, far away from the vertical part, of each L-shaped bearing pipe is located in each notch, each vertical part is provided with a through hole in a vertical direction, the length of each through hole is slightly larger than the thickness of the bridge deck slab poured on the U beam, a bolt hole communicated with the through hole is horizontally formed in the side wall, located above the thickness of the bridge;
the triangular supports are respectively arranged corresponding to one L-shaped bearing pipe and comprise a first supporting rod, a second supporting rod and a third supporting rod which are sequentially and fixedly connected, wherein the second supporting rod is horizontally arranged, the first supporting rod is vertically arranged, the upper end of the first supporting rod extends upwards to the outside of the second supporting rod and then penetrates out of the through hole upwards, the third supporting rod is fixedly connected with the lower end of the first supporting rod, and a bearing block is welded on the side wall of the upper end of the first supporting rod, which is positioned outside the through hole;
the door-shaped embedded ribs are vertically arranged on one end, close to the L-shaped bearing pipe, of the upper surface of the U beam respectively and are uniformly distributed along the length direction of the U beam, two ends of each door-shaped embedded rib are embedded and fixed in the U beam, and the plane direction of each door-shaped embedded rib is the same as the width direction of the U beam;
the connecting ribs are respectively arranged corresponding to one L-shaped bearing pipe, the upper ends of the connecting ribs are first U-shaped bent portions which are horizontally arranged with notch directions facing the U-shaped beam, two ends of each first U-shaped bent portion are bent downwards twice to form second U-shaped bent portions with notch directions back to the U-shaped beam, and each first supporting rod is located at the bottom of a notch of one first U-shaped bent portion;
and the horizontal arrangement and two ends of each tensile steel bar are respectively inserted into the notches of the two second U-shaped bent parts of one connecting rib, and each tensile steel bar is also respectively positioned in the notches of the door-shaped pre-embedded ribs at the corresponding positions on the U-shaped beam.
2. The cast-in-place hanging bracket with the novel overhanging light structure as claimed in claim 1, wherein the side wall of the first supporting rod above the bearing block is further provided with a pair of through holes, and a safety pin is arranged in the pair of through holes.
3. The cast-in-place hanging bracket with the novel overhanging light structure as claimed in claim 1, wherein the number of the gate-type embedded ribs is at least 2 for each connecting rib, and the tensile steel bar corresponding to each connecting rib simultaneously penetrates into the notches of the 2 gate-type embedded ribs and the notches of the two second U-shaped bending parts of the connecting rib.
4. The cast-in-place suspension bracket with the novel overhanging light structure as claimed in claim 1, wherein the bottom of the tripod is further provided with a supporting leg, one end of the supporting leg is fixedly connected with the lower end of the first supporting rod, and the other end of the supporting leg is abutted against the surface of the web plate of the U-shaped beam.
5. The new cast-in-place cantilever light structure suspension frame as claimed in claim 1, wherein the tripod is formed by machining steel with a square shape of 50mm x 25mm x 3mm, the bearing block is a flat iron with a square shape of 50mm x 20mm x 6mm, the L-shaped bearing pipe is steel with a square shape of 65mm x 35mm x 3mm, and the limit bolt is 25mm long.
6. The use method of the novel cast-in-situ suspension bracket with the overhanging light structure is characterized by comprising the following steps:
s1, uniformly arranging a plurality of door-shaped embedded ribs on one side, close to a position to be installed, of the upper surface of the U beam along the length direction of the U beam, wherein the door-shaped embedded ribs are vertically arranged and are located in the same plane direction as the width direction of the U beam, a notch formed outwards is formed in the top angle of the U beam, and the notch extends along the length direction of the U beam;
s2, respectively binding a lifting rope on the door-shaped embedded rib corresponding to the position to be installed of each tripod, binding and fixing the other end of the lifting rope and one end of each tripod far away from the U-beam, sleeving an L-shaped bearing pipe on the upper end of each tripod and fixing the L-shaped bearing pipe and the tripod relatively, integrally suspending the L-shaped bearing pipe and the tripod to the outer side of a web plate of the U-beam, and vertically installing the L-shaped bearing pipe at the vertex angle of the U-beam, wherein the horizontal part of the L-shaped bearing pipe is vertical to the length direction of the U-beam, and one end of the horizontal part far away from the vertical part is positioned in the notch and is abutted against the;
s3, hooking the vertical part of the L-shaped bearing pipe by using the first U-shaped bending part of the connecting rib, inserting a tensile steel bar into the second U-shaped bending part of the connecting rib, inserting the tensile steel bar into the notch of the door-shaped embedded rib at the corresponding position, and respectively and tightly contacting the L-shaped bearing pipe with the connecting rib, the tensile steel bar with the door-shaped embedded rib, so as to provide a supporting force in the horizontal direction for the L-shaped bearing pipe;
s4, arranging a row of distribution beams on the second support rods of all the tripods at intervals, wherein the length direction of the distribution beams is consistent with that of the U-shaped beams, then paving bottom moulds on all the distribution beams, starting to pour a bridge deck after the bottom moulds are paved, and arranging a protection area for the L-shaped bearing pipes during pouring to prevent cement slurry from entering the L-shaped bearing pipes;
s5, after the bridge deck slab is poured, sequentially removing the bottom die and the distribution beam, then removing the tripod and the L-shaped bearing pipe from each other, lowering the tripod by using the lifting ropes to enable the tripod to be completely separated from the L-shaped bearing pipe, then drawing the tripod from the outer side of the bridge deck slab, taking back the tripod, cutting all connecting ribs, taking out all the L-shaped bearing pipes, and finally recovering all the lifting ropes.
7. The method of claim 6, wherein in step S1, when the L-shaped support tube is sleeved on the upper end of the tripod and fixed relatively, the first support rod of the tripod is vertically extended upward through the through hole of the L-shaped support tube until the support block is located above the L-shaped support tube, then the position of the tripod is adjusted to make the top surface of the L-shaped support tube contact with the support block sufficiently, then the limit bolt is tightened to release the fixation between the tripod and the L-shaped support tube, the limit bolt is firstly unscrewed, and then the position of the tripod is adjusted to make the first support rod with the support block move downward out of the through hole of the L-shaped support tube.
8. The method of claim 7, wherein a pair of through holes are formed in the side wall of the tripod above the bearing block, a safety pin is inserted into the through holes, and when the tripod and the L-shaped bearing pipe are released from the fixation, the safety pin is pulled out and then the limit bolt is unscrewed.
9. The method of using the novel cast-in-place hanging bracket with the overhanging light structure as claimed in claim 6, wherein when the protective area is set for the L-shaped bearing pipe in step S4, a PVC pipe is sleeved on the L-shaped bearing pipe, and then geotextile is filled in the PVC pipe.
10. The use method of the novel overhanging light-structure cast-in-place hanging bracket as claimed in claim 6, wherein before the distribution beam is arranged and the bottom die is laid, a lifting lug is welded at each end of each distribution beam, a hole is formed in the outer side of the bottom die, a lifting rope is connected in each lifting lug and the hole in the bottom die, the other end of each lifting rope is fixedly connected with a door-shaped pre-buried rib at the corresponding position, when the bottom die and the distribution beam are removed, the bottom die and the distribution beam are sequentially pulled outwards along the width direction of the U-shaped beam by the lifting ropes until completely leaving the bottom of the bridge deck, and then the bottom die and the distribution beam are pulled onto the bridge deck to be recovered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010589284.8A CN111764289A (en) | 2020-06-24 | 2020-06-24 | Novel cast-in-place suspension bracket with overhanging light structure and use method thereof |
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| CN202010589284.8A CN111764289A (en) | 2020-06-24 | 2020-06-24 | Novel cast-in-place suspension bracket with overhanging light structure and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808759A (en) * | 2022-05-27 | 2022-07-29 | 中建八局第三建设有限公司 | Cantilever concrete formwork support structure of steel-concrete composite beam bridge and cantilever concrete construction method |
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2020
- 2020-06-24 CN CN202010589284.8A patent/CN111764289A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808759A (en) * | 2022-05-27 | 2022-07-29 | 中建八局第三建设有限公司 | Cantilever concrete formwork support structure of steel-concrete composite beam bridge and cantilever concrete construction method |
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