CN110847046B - Road bridge steel formwork structure of resistance to compression - Google Patents

Road bridge steel formwork structure of resistance to compression Download PDF

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Publication number
CN110847046B
CN110847046B CN201911143738.2A CN201911143738A CN110847046B CN 110847046 B CN110847046 B CN 110847046B CN 201911143738 A CN201911143738 A CN 201911143738A CN 110847046 B CN110847046 B CN 110847046B
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reinforcing
concrete
steel
pressure
fixedly connected
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CN110847046A (en
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耿立辉
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Song Shimin
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Wuhan Ruijinfeng Road And Bridge Equipment Co ltd
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The invention provides a compression-resistant road and bridge steel template structure, which comprises a steel template body for concrete pouring for road and bridge construction, a plurality of transverse reinforcing ribs for reinforcing the steel template body, a plurality of longitudinal reinforcing ribs for further reinforcing the steel template body and the transverse reinforcing ribs, a movable combined compression-resistant mechanism for improving the compression resistance of the steel template body and a concrete reinforcing mechanism for reinforcing concrete and weakening the pressure of the concrete on the steel template body, and relates to the field of steel templates. This road bridge steel form structure of resistance to compression is through setting up the special resistance to compression mechanism to the column steel form, can control the bearing position and the bearing strength of steel form in a flexible way to effectual general steel form of having solved need often customize according to actual conditions when using, efficiency is lower, and local bearing unbalance phenomenon is comparatively general, and the local influence is whole, influences the holistic biggest life's of steel form problem. Is suitable for road and bridge construction.

Description

Road bridge steel formwork structure of resistance to compression
Technical Field
The invention relates to the technical field of steel templates, in particular to a pressure-resistant road and bridge steel template structure.
Background
The steel form is used for concrete placement fashioned steel form, uses some columnar steel forms to carry out concrete placement in road bridge construction process often, and concrete placement is inside the back at the columnar steel form, because the concrete is the fluid before solidifying, so steel form bottom pressure generally is great, and in the concrete setting process, the bottom setting time is long, bears the top gravity time longer.
At present, to the steel form of different shapes, the mode of its resistance to compression is mainly through establishing the strengthening rib additional, consolidates on steel form pressure-bearing position, and to cylindrical steel form, owing to be the mode of pouring of half surround formula, so simple structure, nevertheless to the not demand of pouring of co-altitude, but need the precision computation bottom pressure-bearing capacity, then confirm the intensity of strengthening rib, customize the steel form of adaptation height again.
Moreover, the pressure bearing capacity of the existing reinforcing rib completely depends on the strength of the reinforcing rib to resist pressure, the direction of the pressure of the reinforcing rib is relatively fixed, and the pressure which is fixed or stronger and stronger is always generated in one direction and one position, so that the pressure bearing of the whole steel template is usually smaller, the local pressure bearing is extremely strong, and the pressure bearing is unbalanced.
General steel form often needs the customization according to actual conditions when using, and efficiency is lower, and the unbalanced phenomenon of local pressure-bearing is comparatively general, and the local influence is whole, influences the holistic maximum life of steel form, so needs the road bridge steel form structure of a resistance to compression.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a pressure-resistant road and bridge steel template structure, which solves the problems that when a common steel template is used, the common steel template is required to be customized according to actual conditions, the efficiency is low, the phenomenon of local pressure bearing imbalance is common, the whole body is locally influenced, and the maximum service life of the whole steel template is influenced.
Second, technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a pressure-resistant road and bridge steel template structure comprises a steel template body for concrete pouring for road and bridge construction, a plurality of transverse reinforcing ribs for reinforcing the steel template body, a plurality of longitudinal reinforcing ribs for further reinforcing the steel template body and the transverse reinforcing ribs, a movable combined pressure-resistant mechanism for improving the pressure-resistant capability of the steel template body and a concrete reinforcing mechanism for reinforcing concrete and weakening the pressure of the concrete on the steel template body, wherein the plurality of transverse reinforcing ribs are fixedly connected on the surface of the steel template body at equal intervals, the longitudinal reinforcing ribs are fixedly connected on the surface of the steel template body, two ends of each longitudinal reinforcing rib are respectively fixedly connected with the surfaces of two adjacent transverse reinforcing ribs, the movable combined pressure-resistant mechanism is arranged outside the steel template body, and the concrete reinforcing mechanism is arranged at the inner bottom of the steel template body, the longitudinal reinforcing ribs and the transverse reinforcing ribs are arranged to reinforce the steel template.
Preferably, the movable combined compression-resisting mechanism comprises a stacking reinforcing mechanism and a conduction compression-resisting mechanism, the stacking reinforcing mechanism is composed of a plurality of acute angle reinforcing chains, each acute angle reinforcing chain comprises an upper fixing rod, a pressing fixing rod, an arc-shaped pressing block, a hinge shaft and two connecting rings, the surface of the upper fixing rod is fixedly connected with the arc-shaped pressing block, the surface of the arc-shaped pressing block is in lap joint with the upper surface of a transverse reinforcing rib, one end, away from the arc-shaped pressing block, of the upper fixing rod is hinged to the surface of the hinge shaft, one end of the pressing fixing rod is hinged to the surface of the hinge shaft, the two ends of the hinge shaft are fixedly connected with one connecting ring, the upper fixing rod and the pressing fixing rod are arranged to conveniently generate an acute angle capable of transmitting pressure, and the pressure generated above is changed into the force for reinforcing the steel formwork through the transfer of.
Preferably, adjacent two the one end of the pressure solid pole that lies in on the acute angle reinforcing chain of top between the acute angle reinforcing chain and the surface overlap joint of the last solid pole that lies in on the acute angle reinforcing chain of below, the pressure solid pole is the arc form with the one end of last solid pole contact, each it includes two at least acute angle reinforcing chains to fold and press strengthening mechanism, it is same it is last to fold the one end fixedly connected with arc briquetting of the pressure solid pole that lies in on the acute angle reinforcing chain of below, sets up the arc briquetting and is the height for the fixed acute angle hinge of horizontal strengthening rib of cooperation, sets up two acute angle hinges and can overlap joint each other, is for superpose transmission pressure, produces the power to the bigger resistance to compression in bottom.
Preferably, the conduction compression-resistant mechanism comprises inclined supporting plates and cushion rings, the number of the inclined supporting plates corresponds to that of the overlying reinforcing mechanisms one by one, the inclined supporting plate is fixedly connected with a plurality of supporting bodies which are in one-to-one correspondence with the acute angle reinforcing chains on the same overlying reinforcing mechanism, the surface of the supporting body is provided with a slot, the inner wall of the slot is provided with a movable groove, the surface of the pressing and fixing rod is movably connected with the inner wall of the movable groove, the inner wall of the slot is provided with a plurality of tooth sockets, the surface of the connecting ring is fixedly connected with a plurality of clamping teeth which are in one-to-one correspondence with the tooth sockets, the lower the horizontal height of the supporting body on the same inclined supporting plate is, the longer the transverse length of the pressure-resistant mechanism is, the more the clamping teeth and the clamping grooves are arranged, the purpose that partial inclined force is born by the clamping teeth and the clamping grooves and is converted into circumferential force which is consumed by the clamping teeth and the clamping grooves is achieved, and the pressure of the conduction pressure-resistant mechanism is reduced.
Preferably, a plurality of pad pressure tank has been seted up to the bottom of filling up the clamping ring, the bottom of slope backup pad is pegged graft with the inner wall that fills up the pressure tank, the top of filling up the pressure tank is provided with the screw hole, the inner wall threaded connection fixing bolt of screw hole, the bottom of slope backup pad is through fixing bolt and screw hole and the inner wall fixed connection who fills up the pressure tank, and it is the position for restricting the slope backup pad to set up the pad clamping ring to undertake partial pressure.
Preferably, the concrete reinforcing mechanism includes concrete otter board, a plurality of concrete anchor strut, spring steel wire, goes out the air duct, fixed side rod and friction gas seam, the concrete otter board is located the interior bottom of steel form body, the material of concrete otter board includes the concrete, the fixed surface of concrete otter board is connected with a plurality of concrete anchor strut, a plurality of fixedly connected with spring steel wire between the concrete anchor strut sets up concrete otter board and concrete anchor strut and is for the concrete of restriction and reinforcement bottom, alleviates the pressure of bottom steel form.
Preferably, the fixed limit pole of edge fixedly connected with of concrete otter board, the material of fixed limit pole and concrete anchor strut all includes the concrete, the inside of fixed limit pole and concrete anchor strut all is provided with the reinforcing bar, go out the air slot and set up on the inner wall of steel form body, the surface of fixed limit pole is pegged graft with the inner wall of going out the air slot, be provided with between fixed limit pole and the air slot because of the friction produce tiny and coarse friction gas seam, set up the friction gap and be released in order to make the bubble follow the friction gap and go out, the thick liquid is difficult to pass through the gap.
Third, beneficial effect
(1) According to the invention, the movable combined compression-resisting mechanism is arranged, the laminating and reinforcing mechanism is matched with the conduction compression-resisting mechanism, so that the compression-resisting strength can be reinforced on the columnar steel template with any length, the pressure bearing mode of the laminating and reinforcing mechanism is that the reverse force of the upper compression-resisting mechanism is laminated layer by layer, and the laminated compression-resisting force supports the pressure-bearing structure at the bottom.
(2) According to the invention, the acute angle reinforcing chains are arranged, so that the acute angle reinforcing chains can be independently taken out, the disassembly is convenient, the independence is strong, the compression-resistant reverse force can be transferred by independently utilizing the upper fixing rod and the compression fixing rod, the use is convenient, and on the other hand, a plurality of acute angle reinforcing chains can be overlapped and used and are mutually matched, the pressure-bearing capacity is greatly improved, the positions of the acute angle reinforcing chains can be randomly adjusted, the compression-resistant positions can be conveniently adjusted according to actual conditions, and the limitation of the pressure-bearing of the existing steel formwork is greatly avoided.
(3) According to the invention, the concrete reinforcing mechanism is arranged, the concrete screen plate is used for limiting and reinforcing the concrete at the bottom of the steel template, and the concrete reinforcing rod and the spring steel wire on the concrete screen plate can play a role in limiting and reinforcing the concrete, so that the pressure at the bottom of the steel template is greatly reduced, and simultaneously, the friction gap can release bubbles and water pressure generated by vibration at the bottom of the concrete through the air outlet groove, so that the pressure at the bottom of the steel template is reduced.
(4) According to the invention, the special compression-resistant mechanism aiming at the columnar steel template is arranged, so that the pressure-bearing position and the pressure-bearing strength of the steel template can be flexibly controlled, and the problems that the general steel template is usually customized according to the actual condition when in use, the efficiency is low, the local pressure-bearing imbalance phenomenon is common, the whole is locally influenced, and the maximum service life of the whole steel template is influenced are effectively solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the structure of FIG. 1 at A according to the present invention;
FIG. 3 is a front view of an acute angle reinforcing link structure of the present invention;
FIG. 4 is a top view of a concrete mesh panel structure of the present invention.
The steel formwork comprises a steel formwork body 1, a transverse reinforcing rib 2, a longitudinal reinforcing rib 3, a movable combined compression-resisting mechanism 4, a 41-laminating reinforcing mechanism, a 411 acute angle reinforcing chain, a 4112 upper fixing rod, a 4113 compression-fixing rod, a 4114 arc-shaped pressing block, a 4115 hinged shaft, a 4116 connecting ring, a 42-conduction compression-resisting mechanism, a 421 inclined supporting plate, a 422 cushion pressing ring, a 423 supporting body, a 424 inserting groove, a 425 movable groove, a 426 tooth groove, 427 clamping teeth, a 428 cushion pressing groove, a 429 threaded hole, a 4210 fixing bolt, a 5 concrete reinforcing mechanism, a 51 concrete screen plate, a 52 concrete reinforcing rod, a 53 spring steel wire, a 54 air outlet groove, a 55 fixing side rod and a 56 friction air gap.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-4, an embodiment of the present invention provides a pressure-resistant road and bridge steel formwork structure, which includes a steel formwork body 1 for concrete casting used for road and bridge construction, a plurality of transverse reinforcing ribs 2 for reinforcing the steel formwork body 1, a plurality of longitudinal reinforcing ribs 3 for further reinforcing the steel formwork body 1 and the transverse reinforcing ribs 2, a movable combined pressure-resistant mechanism 4 for improving the pressure-resistant capability of the steel formwork body 1, and a concrete reinforcing mechanism 5 for reinforcing concrete and weakening the pressure of the concrete on the steel formwork body 1, wherein the plurality of transverse reinforcing ribs 2 are fixedly connected to the surface of the steel formwork body 1 at equal intervals, the longitudinal reinforcing ribs 3 are fixedly connected to the surface of the steel formwork body 1, two ends of the longitudinal reinforcing ribs 3 are respectively fixedly connected to the surfaces of two adjacent transverse reinforcing ribs 2, the movable combined pressure-resistant mechanism 4 is arranged outside the steel formwork body 1, the concrete reinforcing mechanism 5 is arranged at the inner bottom of the steel template body 1.
The movably combined pressure-resisting mechanism 4 comprises a pressure-superposed reinforcing mechanism 41 and a conduction pressure-resisting mechanism 42, the pressure-superposed reinforcing mechanism 41 is composed of a plurality of acute angle reinforcing chains 411, each acute angle reinforcing chain 411 comprises an upper fixing rod 4112, a pressure-fixed rod 4113, an arc-shaped pressing block 4114, a hinge shaft 4115 and two connecting rings 4116, the surface of the upper fixing rod 4112 is fixedly connected with the arc-shaped pressing block 4114, the surface of the arc-shaped pressing block 4114 is overlapped with the upper surface of the transverse reinforcing rib 2, one end of the upper fixing rod 4112, far away from the arc-shaped pressing block 4114, is hinged with the surface of the hinge shaft 4115, one end of the pressure-fixed rod 4113 is hinged with the surface of the hinge shaft 4115, two ends of the hinge shaft 4115 are both fixedly connected with one connecting ring 4116, one end of the pressure-fixed rod 4113, positioned on the upper acute angle reinforcing chain 411, between two adjacent acute angle reinforcing chains 411, is overlapped with the surface of the upper fixing rod, each pressure-superposed reinforcing mechanism 41 comprises at least two acute angle reinforcing chains 411, one end of a pressure-fixing rod 4113 on the acute angle reinforcing chain 411 at the lowest position on the same pressure-superposed reinforcing mechanism 41 is fixedly connected with an arc-shaped pressure block 4114, the conduction pressure-resisting mechanism 42 comprises an inclined supporting plate 421 and a cushion pressing ring 422, the number of the inclined supporting plates 421 corresponds to that of the pressure-superposed reinforcing mechanisms 41 one by one, a plurality of supporting bodies 423 corresponding to the acute angle reinforcing chains 411 on the same pressure-superposed reinforcing mechanism 41 one by one are fixedly connected on the inclined supporting plate 421, a slot 424 is formed in the surface of the supporting body 423, a movable slot 425 is formed in the inner wall of the slot 424, the surface of the pressure-fixing rod 4113 is movably connected with the inner wall of the movable slot 425, a plurality of tooth grooves 426 are formed in the inner wall of the slot 424, a plurality of clamping teeth 427 corresponding to the tooth grooves 426 one, the longer the transverse length of the inclined support plate is, the bottom of the cushion pressing ring 422 is provided with a plurality of cushion pressing grooves 428, the bottom of the inclined support plate is inserted into the inner walls of the cushion pressing grooves 428, threaded holes 429 are formed above the cushion pressing grooves 428, the inner walls of the threaded holes 429 are in threaded connection with fixing bolts 4210, and the bottom of the inclined support plate is fixedly connected with the inner walls of the cushion pressing grooves 428 through the fixing bolts 4210 and the threaded holes 429.
The concrete reinforcing mechanism 5 comprises a concrete screen 51, a plurality of concrete reinforcing rods 52 and spring steel wires 53, air outlet groove 54, fixed side rod 55 and friction air gap 56, concrete otter board 51 is located the interior bottom of steel form body 1, concrete otter board 51's material includes the concrete, concrete otter board 51's fixed surface is connected with a plurality of concrete anchor strut 52, fixedly connected with spring wire 53 between a plurality of concrete anchor strut 52, concrete otter board 51's fixed side rod 55 of edge fixedly connected with, the material of fixed side rod 55 and concrete anchor strut 52 all includes the concrete, the inside of fixed side rod 55 and concrete anchor strut 52 all is provided with the reinforcing bar, air outlet groove 54 sets up on the inner wall of steel form body 1, the surface of fixed side rod 55 is pegged graft with the inner wall of air outlet groove 54, be provided with because of the friction between fixed side rod 55 and the air outlet groove 54 and produce tiny and coarse friction air gap 56.
When the concrete screen plate is used, in the first step, the concrete screen plate 51 is placed at a position where concrete is poured, and the cushion ring 422 is sleeved outside the concrete screen plate 51, so that the concrete screen plate 51 and the cushion ring 422 are concentric; secondly, hoisting the steel formwork body 1 to align the steel formwork body 1 below the concrete screen plate 51, so that the steel formwork body 1 surrounds the concrete screen plate 51, and the air outlet groove 54 is aligned with the fixed side rod 55; thirdly, sliding the inclined support plate 421 into the corresponding proper slot 424, and fixing the inclined support plate 421 through the fixing bolt 4210 and the threaded hole 429; fourthly, taking out the acute angle reinforcing chain 411, attaching the arc-shaped pressing block 4114 above the transverse reinforcing rib 2, reducing the included angle between the upper fixing rod 4112 and the pressing rod 4113, sliding the connecting ring 4116 into the slot 424 opposite to the slot 424, and sliding the latch 427 into the slot 426 opposite to the slot 426; fifthly, rotating the pressing and fixing rod 4113, enabling the pressing and fixing rod 4113 to be in lap joint with an upper fixing rod 4112 on the acute angle reinforcing chain 411 below, transmitting pressure generated by the upper layer in the steel formwork body 1 to the upper fixing rod 4112 on the upper layer, transmitting the pressure to the pressing and fixing rod 4113 by the upper fixing rod 4112 through a support body 423, a hinge shaft 4115 and a connecting ring 4116, and transmitting the pressure to the upper fixing rod 4112 below through the pressing and fixing rod 4113 to generate compressive resistance to the lower part of the steel formwork body 1; and sixthly, selecting the number of the acute angle reinforcing chains 411 according to actual conditions, and reinforcing the concrete at the bottom in the steel template body 1 by the concrete mesh plate 51, the concrete reinforcing rods 52 and the spring steel wires 53. Like this, the air in the concrete of bottom can be along following friction gas seam 56 and get into the inside release of air outlet groove 54 when migrating to the inner wall border of steel form body 1 to the use of whole resistance to compression road bridge steel form structure has been accomplished.

Claims (3)

1. The utility model provides a road bridge steel template structure of resistance to compression which characterized in that: the concrete reinforcing and pressure resisting device comprises a steel template body (1) for concrete pouring for road and bridge construction, a plurality of transverse reinforcing ribs (2) for reinforcing the steel template body (1), a plurality of longitudinal reinforcing ribs (3) for further reinforcing the steel template body (1) and the transverse reinforcing ribs (2), a movable combined pressure resisting mechanism (4) for improving the pressure resisting capability of the steel template body (1) and a concrete reinforcing mechanism (5) for reinforcing concrete and weakening the pressure of the concrete on the steel template body (1), wherein the transverse reinforcing ribs (2) are fixedly connected on the surface of the steel template body (1) at equal intervals, the longitudinal reinforcing ribs (3) are fixedly connected on the surface of the steel template body (1), two ends of each longitudinal reinforcing rib (3) are respectively fixedly connected with the surfaces of two adjacent transverse reinforcing ribs (2), and the movable combined pressure resisting mechanism (4) is arranged outside the steel template body (1), the concrete reinforcing mechanism (5) is arranged at the inner bottom of the steel formwork body (1);
the movable combined compression-resistant mechanism (4) comprises a laminating reinforcing mechanism (41) and a conduction compression-resistant mechanism (42), the laminating reinforcing mechanism (41) consists of a plurality of acute angle reinforcing chains (411), each acute angle reinforcing chain (411) comprises an upper fixing rod (4112), a pressing rod (4113), an arc-shaped pressing block (4114), a hinge shaft (4115) and two connecting rings (4116), the surface of the upper fixing rod (4112) is fixedly connected with the arc-shaped pressing block (4114), the surface of the arc-shaped pressing block (4114) is overlapped with the upper surface of a transverse reinforcing rib (2), one end, far away from the arc-shaped pressing block (4114), of the upper fixing rod (4112) is hinged to the surface of the hinge shaft (4115), one end of the pressing rod (4113) is hinged to the surface of the hinge shaft (4115), and one connecting ring (4116) is fixedly connected to both ends of the hinge shaft (4115);
the concrete reinforcing mechanism (5) comprises a concrete screen plate (51), a plurality of concrete reinforcing rods (52), spring steel wires (53), an air outlet groove (54), a fixed side rod (55) and a friction air seam (56), wherein the concrete screen plate (51) is positioned at the inner bottom of the steel template body (1), the concrete screen plate (51) is made of concrete, the surface of the concrete screen plate (51) is fixedly connected with the plurality of concrete reinforcing rods (52), and the spring steel wires (53) are fixedly connected among the plurality of concrete reinforcing rods (52);
the conduction pressure-resistant mechanism (42) comprises an inclined supporting plate (421) and a cushion ring (422), the inclined supporting plate (421) corresponds to the laminating reinforcing mechanism (41) one by one, a plurality of supporting bodies (423) which correspond to the acute angle reinforcing chain (411) on the same laminating reinforcing mechanism (41) one by one are fixedly connected to the inclined supporting plate (421), a slot (424) is formed in the surface of each supporting body (423), a movable groove (425) is formed in the inner wall of each slot (424), the surface of each pressing rod (4113) is movably connected with the inner wall of each movable groove (425), a plurality of tooth grooves (426) are formed in the inner wall of each slot (424), a plurality of clamping teeth (427) which correspond to the tooth grooves (426) one by one are fixedly connected to the surface of the connecting ring (4116), and the same level of the supporting bodies (423) on the inclined supporting plate is lower, the longer its transverse length;
the edge fixedly connected with fixed side rod (55) of concrete otter board (51), the material of fixed side rod (55) and concrete anchor strut (52) all includes the concrete, the inside of fixed side rod (55) and concrete anchor strut (52) all is provided with the reinforcing bar, go out gas groove (54) and set up on the inner wall of steel form body (1), the surface of fixed side rod (55) is pegged graft with the inner wall of going out gas groove (54), be provided with between fixed side rod (55) and the play gas groove (54) because of the friction produced tiny and coarse friction gas seam (56).
2. The pressure-resistant road bridge steel formwork structure according to claim 1, wherein: adjacent two the one end of the firm pole of pressure (4113) on the acute angle reinforcing chain (411) that is located the top between acute angle reinforcing chain (411) and the surperficial overlap joint of the firm pole of going up (4112) on the acute angle reinforcing chain (411) that is located the below, press firm pole (4113) and the one end of the firm pole of going up (4112) contact and be the arc form, each it includes two at least acute angle reinforcing chains (411) to fold and press reinforcing mechanism (41), it is same it has arc briquetting (4114) to fold the one end fixedly connected with of the firm pole of pressure (4113) that lies in on the acute angle reinforcing chain (411) of below on reinforcing mechanism (41).
3. The pressure-resistant road bridge steel formwork structure according to claim 2, wherein: pad pressure tank (428) have been seted up to a plurality of bottom of backing up clamping ring (422), the bottom of slope backup pad is pegged graft with the inner wall that fills up pressure tank (428), the top of filling up pressure tank (428) is provided with screw hole (429), the inner wall threaded connection fixing bolt (4210) of screw hole (429), the bottom of slope backup pad is through fixing bolt (4210) and screw hole (429) and the inner wall fixed connection who fills up pressure tank (428).
CN201911143738.2A 2019-11-20 2019-11-20 Road bridge steel formwork structure of resistance to compression Active CN110847046B (en)

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CN112610018A (en) * 2020-12-22 2021-04-06 魏如雪 A reinforcement assembly for square steel column that building engineering used

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