CN210316492U - Cantilever beam connecting structure - Google Patents
Cantilever beam connecting structure Download PDFInfo
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- CN210316492U CN210316492U CN201920863465.8U CN201920863465U CN210316492U CN 210316492 U CN210316492 U CN 210316492U CN 201920863465 U CN201920863465 U CN 201920863465U CN 210316492 U CN210316492 U CN 210316492U
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Abstract
The utility model provides a cantilever beam connecting structure, which comprises an embedded part, wherein the embedded part comprises at least two embedded sleeves, and the embedded sleeves are fixedly connected through a connecting plate so as to keep a preset distance and an angle between the embedded sleeves; one end of the embedded sleeve is used for being in threaded connection with a fixed welding screw welded with embedded steel bars in concrete, and the other end of the embedded sleeve is used for being in threaded connection with a connecting screw. Through adopting a plurality of pre-buried sleeves, and confirm the scheme of relative position between the pre-buried sleeve, can ensure pre-buried precision of pre-buried sleeve, reduce the degree of difficulty of later stage installation. By adopting the scheme of fixedly connecting the embedded sleeve and the embedded steel bar, the stress reliability of the embedded sleeve is further ensured, and the construction efficiency and the safety are greatly improved.
Description
Technical Field
The utility model relates to a cantilever beam connection structure field for building, especially a cantilever beam connection structure.
Background
When the traditional I-shaped steel of the cantilever frame is installed, the I-shaped steel needs to be laid on a floor through a shear wall, and then is fixed on the floor through reinforcing steel bars, so that the installation is troublesome, time-consuming, and the labor intensity is high. When passing through the shear wall, the cross section of the wall body is damaged, so that the design strength is broken, and the difficulty of the woodworking formwork erection is increased. The I-shaped cantilever beam penetrating through the shear wall can be detached only by two persons in half a day, and great potential safety hazards exist in the construction process. The wall body after demolising produces more hole, influences construction quality, and the hole after repairing also is one of the root cause the seepage, and the I-beam also can cause the seepage in upstairs downstairs later stage after demolising at indoor fixed position, also very big influence the construction progress simultaneously.
Also have among the prior art and adopt pre-buried screw rod to carry out the scheme fixed, but pre-buried screw rod need wear out outside the template, and it is very troublesome to found the mould installation. Chinese patent document CN 105113781B describes a fully embedded installation and erection device for cantilever beam side, in which an i-steel connected with a concrete wall and an embedded device are included, the embedded device includes a main pipe embedded in the concrete wall, a non-rotatable square nut fixed in the bottom of the main pipe, and a plastic protective cover covering the square nut in the main pipe. The problem that this scheme exists is that, the main pipe fitting is pre-buried in the concrete, pours the completion back, and constructor hardly finds the pre-buried position of main pipe fitting. The main pipe is also easily moved during the process of placing concrete. The document states that two bolts are preferably arranged on each cantilever beam connecting structure, but the pre-embedding precision of a main pipe fitting is difficult to ensure, so that subsequent mounting hole positions are difficult to align and difficult to mount, and a proper anti-rust measure is not adopted, so that potential safety hazards exist. Due to construction errors or workpiece flaws, the quality of each cantilever beam connecting structure is difficult to meet the requirements, the bearing capacity and the stability reach expectations, and construction potential safety hazards are caused. How to monitor the state of each cantilever beam connecting structure, especially the deformation state of a bolt, in a reasonable cost range to ensure the safety and reliability of the cantilever beam connecting structure, and no better scheme exists at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cantilever beam connection structure is provided, technological problem among the prior art can ensure pre-buried telescopic pre-buried precision, reduces the degree of difficulty of later stage installation. In the preferred scheme, constructors can conveniently find the embedded position of the embedded sleeve. The deformation of the cantilever beam connecting structure can be monitored at lower cost, and potential safety hazards can be found in time.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a cantilever beam connecting structure comprises embedded parts, wherein the embedded parts are at least two embedded sleeves, and the embedded sleeves are fixedly connected through a connecting plate so as to keep preset intervals and angles between the embedded sleeves;
one end of the embedded sleeve is used for being in threaded connection with a fixed welding screw welded with embedded steel bars in concrete, and the other end of the embedded sleeve is used for being in threaded connection with a connecting screw.
In the preferred scheme, the embedded sleeves are arranged in parallel and fixedly connected through a plurality of parallel connecting plates;
the connecting screw rod penetrates through a hole in a base plate of the cantilever beam connecting structure and the base plate to be connected with the nut, and the base plate is fixedly connected with the beam rod.
In the preferred scheme, the embedded sleeves are vertically overlapped and arranged in a crossed manner, the embedded sleeves are fixedly connected through a plurality of angle connecting plates, and the axes of the holes in the base plate are correspondingly vertically overlapped and arranged in a crossed manner;
the connecting screw rod penetrates through a hole in a base plate of the cantilever beam connecting structure and the base plate to be connected with the nut, and the base plate is fixedly connected with the beam rod.
In the preferred scheme, one end of the embedded sleeve, which is close to the outer side of the concrete, is provided with a conical head, and one end of the embedded sleeve, which is close to the outer side of the concrete, is used for tightly adhering to the inner side surface of the template.
In the preferred scheme, one end of the embedded sleeve, which is close to the outer side of the concrete, is provided with a positioning ring, and the positioning ring is used for temporarily plugging a threaded hole of the embedded sleeve;
the end face of one end of the positioning ring, which is close to the outer side of the concrete, is provided with an indicating groove, and the indicating groove is filled with water-absorbing gel for absorbing water.
In a preferred scheme, a bulge corresponding to the indicating groove is arranged on one surface, close to the concrete, of the base plate.
In the preferred scheme, the end of the beam rod is provided with a hinge seat, a screw sleeve hinge seat is fixedly arranged on the concrete below the beam rod through an embedded part, the hinge seat and the screw sleeve hinge seat are respectively hinged with a screw sleeve, the two screw sleeves are in threaded connection with the double-headed screw, and the thread directions of the two ends of the double-headed screw are opposite;
in the preferred scheme, the end of the beam rod is provided with a connecting seat, a steel wire rope connecting seat is fixedly arranged on the concrete above the beam rod through an embedded part, the steel wire rope connecting seat and the connecting seat are respectively connected with one end of a steel wire rope, the other end of the steel wire rope is fixedly connected with the tensioning screw rods, the two tensioning screw rods are respectively in threaded connection with the two ends of the tensioning screw rod sleeve, and the thread turning directions of the two ends of the tensioning screw rod sleeve are opposite.
In the preferred scheme, still be equipped with deformation monitoring safety device, deformation monitoring safety device and bed plate threaded connection, deformation monitoring safety device's monitoring head passes the bed plate and is connected with the concrete to the distance change between monitoring bed plate and the concrete.
In a preferred scheme, in the deformation monitoring safety device, a monitoring screw is provided with an external thread, an LED lamp is also arranged in the monitoring screw, and the LED lamp is electrically connected with a battery;
the monitoring screw is connected with the monitoring head in a sliding way, and a spring is arranged between the monitoring head and the battery so that the monitoring head extends outwards and forms electric connection;
a fixed contact is arranged in the monitoring screw, the fixed contact is electrically connected with the LED lamp, and an elastic movable contact is arranged on the monitoring head;
the fixed contact is provided with a groove, the movable contact is provided with a bulge, and a gap is arranged between the bulge and the groove.
The utility model provides a pair of cantilever beam connection structure, through adopting a plurality of pre-buried sleeves, and confirm the scheme of relative position between the pre-buried sleeve, can ensure pre-buried precision of pre-buried sleeve, reduce the degree of difficulty of later stage installation. By adopting the scheme of fixedly connecting the embedded sleeve and the embedded steel bar, the stress reliability of the embedded sleeve is further ensured, and the construction efficiency and the safety are greatly improved. Compared with a step type structure in the prior art, the arranged conical head structure can convert tensile stress applied to concrete into compressive stress, and improves the holding strength of the concrete. The position circle that sets up has a plurality of technological effects, and the hydroscopic gel of filling can absorb and snatch the moisture in near concrete, makes near concrete's hydration insufficient, and there is the difference in colour and concrete color around, and intensity also can receive the influence, and the constructor of being convenient for seeks the position. The locating ring also has the effect of preventing concrete from entering the embedded sleeve. The indicating groove on the positioning ring can also assist in positioning the base plate of the cantilever beam connecting structure in the installation process. The deformation monitoring safety device can monitor the deformation of the connecting screw rod, and safety accidents caused by the deformation of the connecting screw rod are avoided.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of a middle embedded part of the present invention.
Fig. 2 is a schematic structural diagram of the embedded part during mold erecting according to the present invention.
Fig. 3 is a schematic structural diagram of the connection structure of the middle embedded part and the cantilever beam of the present invention.
Fig. 4 is the utility model discloses well concrete corner position's cantilever beam connection structure schematic diagram.
Fig. 5 is a side view of the support structure of the middle cantilever beam connection structure of the present invention.
Fig. 6 is a side view of the tension structure of the middle cantilever beam connection structure of the present invention.
Fig. 7 is a top view of a plurality of cantilever beam connection structures of the present invention.
Fig. 8 is a schematic structural view of the middle deformation monitoring safety device of the present invention.
Fig. 9 is the structure diagram of the middle deformation monitoring safety device of the present invention during monitoring.
Fig. 10 is the structural schematic diagram of the middle deformation monitoring safety device of the present invention when monitoring the deformation of the bolt.
Fig. 11 is a schematic structural view of the middle deformation monitoring safety device when it is not activated.
In the figure: the device comprises embedded parts 1, a first embedded sleeve 101, a conical head 102, a positioning ring 103, an indicating groove 104, a parallel connecting plate 105, a second embedded sleeve 106, a corner connecting plate 107, a longitudinal rib 2, a stirrup 3, a fixed welding screw 4, a deformation monitoring safety device 5, a monitoring head 51, a spring 52, a battery 53, an LED lamp 54, a movable contact 55, a fixed contact 56, a monitoring screw 57, a sliding groove 58, a positioning groove 581, a connecting screw 6, a base plate 7, a backing plate 8, a nut 9, a connecting rib 10, a beam rod 11, concrete 12, a connecting piece 13, a vertical rod 14, a hinged seat 15, a screw sleeve 16, a double-headed screw 17, a screw sleeve hinged seat 18, a steel wire rope connecting seat 19, a steel wire rope 20, a tensioning screw 21, a tensioning screw sleeve 22 and a template 23.
Detailed Description
Example 1:
as shown in fig. 1 and 2, the cantilever beam connection structure includes an embedded part 1, where the embedded part 1 includes at least two embedded sleeves, and the two embedded sleeves are fixedly connected with each other through a connection plate, so that a preset distance and an angle are maintained between the embedded sleeves; by the structure, the distance between the embedded sleeves is convenient to keep consistent with the holes in the base plate 7 of the cantilever beam connecting structure. The problem that the embedded sleeve is difficult to install due to displacement is avoided.
The one end of embedded sleeve is used for with 4 threaded connection of embedded steel bar welded fixed weld screw in concrete 12, from this structure, the location of embedded sleeve of being convenient for also avoids embedded sleeve to shift at the in-process of pouring, influences subsequent installation accuracy, and atress structure, embedded sleeve's the other end and connecting screw 6 threaded connection, connecting screw 6 passes hole and backing plate 8 on cantilever beam connection structure's the bed plate 7 and is connected with the nut, bed plate 7 and roof beam 11 fixed connection. According to the scheme, the connecting screw 6 does not need to penetrate through the template, and the difficulty in erecting the mold is greatly reduced. Further preferably, the embedded sleeve can be made of a corrosion-resistant material, such as a chromium-containing material which is not easy to weld, or an aluminizing rust-proof treatment process. The connecting plate is bound and fixed or welded and fixed with the embedded steel bars by steel wires. Preferably, the beam 11 comprises i-steel, channel steel, angle steel or steel pipe.
The preferable scheme is as shown in fig. 1-3, the embedded sleeves are arranged in parallel, for example, the axes between the first embedded sleeve 101 and the second embedded sleeve 106 are parallel, and the embedded sleeves are fixedly connected through a plurality of parallel connecting plates 105.
In a preferred scheme, as shown in fig. 4, the embedded sleeves are overlapped and crossed up and down, the embedded sleeves are fixedly connected through a plurality of corner connecting plates 107, and the axes of the holes in the base plate 7 are correspondingly overlapped and crossed up and down. By the structure, the distance and the angle between the embedded sleeves are ensured to be consistent with those of the through holes on the base plate 7. Facilitating subsequent installation. The structure is used for supporting the concrete corner position.
Preferably, as shown in fig. 2 and 3, a tapered head 102 is disposed at one end of the embedded sleeve close to the outer side of the concrete 12, and one end of the embedded sleeve close to the outer side of the concrete 12 is used for clinging to the inner side surface of the formwork 23. The structure of the conical head 102 is arranged, when the concrete is stressed, the inclined surface is used for extruding the nearby concrete, compared with a step structure, the tensile stress is converted into the compressive stress, the compressive stress of the concrete is greatly higher than the tensile stress, and the stress strength of the embedded part 1 is improved by the structure.
In the preferable scheme, as shown in fig. 1-3, a positioning ring 103 is arranged at one end of the embedded sleeve close to the outer side of the concrete 12, and the positioning ring is used for temporarily plugging a threaded hole of the embedded sleeve in the pouring process;
an indication groove 104 is formed in the end face of one end, close to the outer side of the concrete 12, of the positioning ring 103, and the indication groove 104 is filled with water absorption gel for absorbing water; the water-absorbing gel is used for absorbing water in the pouring process, occupies the position of concrete after being expanded, and is convenient for finding the position of the embedded sleeve after demolding. The water absorption gel can also influence the strength of concrete in a smaller range after absorbing water, and is convenient for later stripping. The preferred plastics material that adopts of position circle 103 is equipped with the corresponding easy tear line with pre-buried sleeve screw hole in the one side of the pre-buried sleeve screw hole of interim shutoff to break when later stage erection joint screw 6.
Preferably, a protrusion corresponding to the indication groove 104 is provided on a side of the base plate 7 adjacent to the concrete 12. In the installation, earlier clear up the absorbent gel in the instruction groove 104, then place the arch in the instruction groove 104, then the through-hole on the bed plate 7 corresponds with the screw of pre-buried sleeve accuracy this moment, is convenient for install backing plate 8 and nut 9.
In a preferable scheme, the end of the beam rod 11 is provided with a hinge seat 15, a screw sleeve hinge seat 18 is fixedly arranged on the concrete 12 below the beam rod 11 through an embedded part 1, the hinge seat 15 and the screw sleeve hinge seat 18 are respectively hinged with a screw sleeve 16, the two screw sleeves 16 are in threaded connection with a double-head screw 17, and the threads at two ends of the double-head screw 17 are opposite in rotating direction; by the structure, the bearing capacity of the cantilever beam connecting structure is improved.
Or, the end of the beam rod 11 is provided with a connecting seat, in this example, the connecting seat preferably adopts an ear plate, a steel wire rope connecting seat 19 is fixedly arranged on the concrete 12 above the beam rod 11 through an embedded part 1, the steel wire rope connecting seat 19 and the connecting seat are respectively connected with one end of a steel wire rope 20, the other end of the steel wire rope 20 is fixedly connected with a tensioning screw rod 21, two tensioning screw rods 21 are respectively in threaded connection with two ends of a tensioning screw rod sleeve 22, and the thread directions of the two ends of the tensioning screw rod sleeve 22 are opposite. Preferably, a ring protection is arranged at the connection position of the steel wire rope 20 and the connecting seat and the steel wire rope connecting seat 19, so that the steel wire rope is prevented from being damaged due to an overlarge bending angle.
According to the preferable scheme, as shown in fig. 8-11, the deformation monitoring safety device 5 is further arranged, the deformation monitoring safety device 5 is in threaded connection with the base plate 7, and a monitoring head 51 of the deformation monitoring safety device 5 penetrates through the base plate 7 to be connected with the concrete 12 so as to monitor the distance change between the base plate 7 and the concrete 12. The deformation monitoring safety device 5 can adopt a pressure sensor or a displacement sensor, an LED lamp and the like.
In the preferred scheme as shown in fig. 8-11, in the deformation monitoring safety device 5, a monitoring screw 57 is provided with an external thread, a through hole is formed in the middle of the monitoring screw 57, an LED lamp 54 is further arranged in the monitoring screw 57, and the LED lamp 54 is electrically connected with a battery 53; the light emitted from the LED lamp 54 can be observed from the outer end of the monitoring screw 57.
The monitoring screw 57 is connected with the monitoring head 51 in a sliding way, and a spring 52 is arranged between the monitoring head 51 and the battery 53, so that the monitoring head 51 extends outwards and forms electric connection;
a fixed contact 56 is arranged in the monitoring screw 57, the fixed contact 56 is electrically connected with the LED lamp 54, and an elastic movable contact 55 is arranged on the monitoring head 51;
the fixed contact 56 is provided with a groove, the movable contact 55 is provided with a protrusion, and a gap is provided between the protrusion and the groove. Further preferably, a sliding groove 58 is provided on a sidewall of the through hole of the monitoring screw 57, the movable contact 55 is of an elastic cantilever structure, the sliding groove 58 is insulating, and a positioning groove 581 is further provided on a sidewall of the sliding groove 58. Before not using, monitoring head 51 stretches out more, and movable contact 55 is located positioning groove 581, is unused state this moment, adopts this scheme to avoid used deformation monitoring safety device 5 battery power not enough, causes the potential safety hazard. When the monitoring device is used, the monitoring screw 57 is screwed into the monitoring screw hole of the base plate 7, so that the monitoring head 51 is contacted with the concrete 12 and gradually retracts until the movable contact 55 is contacted with the fixed contact 56, and the LED lamp 54 is turned on to emit light. The monitoring screw 57 is continuously screwed, and since a gap exists between the fixed contact 56 and the movable contact 55, which corresponds to the preset deformation amount of the connecting screw 6, when a gap exists between the fixed contact 56 and the movable contact 55, the LED lamp 54 is turned off. For the operating personnel, the monitoring screw 57 is screwed down to enable the LED lamp 54 to be turned on and then turned off, namely, the LED lamp 54 is installed in place, after the connecting screw rod 6 deforms, the gap between the base plate 7 and the concrete 12 is enlarged, at the moment, the fixed contact 56 is in contact with the movable contact 55, the LED lamp 54 is constantly turned on, and the operating personnel is reminded that the deformation of the cantilever beam connecting structure at the position exceeds a preset value and needs to be processed.
Example 2:
a construction method adopting the cantilever beam connecting structure comprises the following steps:
s1, connecting the embedded part 1 with the fixed welding screw 4 in a threaded manner, enabling the end face of an embedded sleeve in the embedded part 1 to be tightly attached to the template 23, welding the fixed welding screw 4 with the embedded steel bar, and binding or welding the embedded part 1 with the embedded steel bar through a steel wire;
s2, pouring concrete, finding the position of the end of the embedded sleeve after the template is removed in the setting stage, and screwing the connecting screw 6 into the embedded sleeve by a preset depth;
s3, sleeving the base plate 7 on the connecting screw rod 6, and installing the backing plate 8 and the nut 9;
the construction of the cantilever beam connecting structure is realized through the steps.
In a preferred embodiment, in step S1, a step of filling the positioning groove 581 with a water-absorbent gel is further provided;
in step s3, there is further provided a step of positioning the base plate 7 using the positioning grooves 581;
after step s3, there is a step of installing the deformation monitoring safety device 5, screwing the monitoring screw 57 into the screw hole of the base plate 7 until the monitoring head 51 abuts against the surface of the concrete 12 and there is no contact between the movable contact 55 and the fixed contact 56.
Example 3:
during the use, in arranging built-in fitting 1 in the ligature reinforcing bar before the reinforcing bar ligature in concrete 12, the preset position is put, and first pre-buried sleeve 101 and second pre-buried sleeve 106 and fixed welding screw 4 threaded connection will be earlier tentatively banded between fixed welding screw 4 and the pre-buried reinforcing bar, and first pre-buried sleeve 101, second pre-buried sleeve 106, parallel connection board 105 or angle connecting plate 107 select suitable position to pass through transition reinforcing bar and pre-buried reinforcing bar ligature. And (5) erecting the mold after the binding is finished, and finely adjusting the position of the embedded part 1 again after the mold erecting is finished so that the end head of the embedded part props against the inner side surface of the template 23. And welding and connecting the fixed welding screw rod 4 with the embedded steel bars. Found the correct back of mould inspection, concreting pours the position that vibrates the in-process and avoids built-in fitting 1 as far as possible, avoids leading to built-in fitting 1 to shift, needs the explanation, the utility model discloses a structure has higher anti ability of shifting. Even if there is a displacement, since the relative position between the first insert sleeve 101 and the second insert sleeve 106 is fixed, the connection with the base plate 7 is not affected. The concrete pouring construction should be completed in 2H as much as possible. After the initial set, demolish the template, continue to water or the maintenance of moisturizing the concrete, because the utility model discloses in set up the structure of instruction groove 104 to filled absorbent gel in instructing groove 104, can make concrete surface color different with other positions because of the change of the water absorption rate, because hydration is insufficient moreover, the concrete that shelters from of position circle 103 terminal surface position is got rid of very easily, consequently does not have high expectations to the demolition time, surpasss the initial set time and demolish the mould also. After final setting, the strength of the concrete reaches 80% of the preset strength, the embedded part 1 can be searched according to the surface color difference change and the relative installation position of the concrete, the shielded concrete is cleaned, the end face of the positioning ring 103 is broken, the connecting screw 6 is screwed into the embedded sleeve to a preset depth, and the inspection is carried out. And lays a foundation for the subsequent installation of the base plate 7. Full welding is carried out between the beam rod 11 and the base plate 7 along the connecting position, no cold joint is detected, the connecting rib 10 is welded between the beam rod 11 and the base plate 7, and the welding requirement ensures that the connecting strength between the beam rod 11 and the base plate 7 is higher than the strength of the beam rod 11 per se. During installation, the through hole in the base plate 7 is sleeved on the connecting screw 6, the base plate 8 is installed, the nut 9 is screwed by a torque wrench, and a spring washer and double nuts are preferably installed for looseness prevention. The preferable connecting screw 6 is a hot-dip galvanized double-thread screw or a chromium alloy double-thread screw. Monitoring screw holes are arranged near the through holes of the base plate 7, and monitoring screws 57 are screwed into the monitoring screw holes until the monitoring heads 51 are tightly abutted against the surface of the concrete. And the LED lamp 54 is turned on, and then the monitor screw 57 is continuously tightened for about a half turn, so that the LED lamp 54 is turned off. I.e. the deformation monitoring safety device 5 is installed. When the connecting screw rod 6 is loosened or the base plate 7 is deformed, the LED lamp 54 is lightened to remind constructors of eliminating potential safety hazards.
The construction is carried out according to the specification of the steel pipe scaffold, the maximum building height of the scaffold is 18m and the number of railings is 19.5m, the distance between the inner vertical rod 17 and the outer wall surface of the building structure 15 is 0.3m, the transverse distance between the inner vertical rod 17 and the outer vertical rod 16 is 0.9m, the longitudinal distance is 1.5m, and the step distance is 1.8 m. And a transverse sweeping rod and a longitudinal sweeping rod are arranged at the top surface of the cantilever beam connecting structure at the height of 200 mm. The transverse floor sweeping rod is fixed at the bottom of the vertical rod through the fastener, and then the longitudinal floor sweeping rod is fixed at the bottom of the vertical rod through the fastener on the transverse floor sweeping rod, so that the overall stability of the fastener steel pipe scaffold is ensured. The outside facade of fastener steel pipe scaffold is full of 4 spans 6 m's bridging to between the outer pole setting and the interior pole setting of every bridging side, set up a horizontal outer brace that the interval is 6m, horizontal outer brace is the zigzag at same internode by bottom to top layer and arranges in succession. The embedded part 1 adopts an embedded part with double embedded sleeves as shown in figures 1-4, and adopts 2 steps and 3 spans with a vertical interval of 3.6m and a horizontal interval of 3-4.5 m. The 3m distance is the cantilever beam connecting structure adopting a round pipe, and the 4.5m distance is the cantilever beam connecting structure adopting I-steel. Two through holes of 22mm are reserved at the position, close to the top, on the base plate 7, and the base plate 7 is connected with the embedded part 1 through two connecting screw rods 6 of 20 mm. The total length of the beam 11 is 1300mm, seamless steel pipes with the diameter of 100-120 mm, the wall thickness of 4mm, the length of 1300mm can be used, and I-shaped steel with the height of 160mm, the width of 90mm and the length of 1300mm can also be used. Taking an I-steel as an example, under the supporting and tensioning structure shown in fig. 5 and 6, calculating that the left section of the supporting point position of the I-steel bears the axial tension of 5.34KN, the section of the I-steel bears the shearing force of 12.81N, the bending moment is 2.56KN m, and the shearing force is-6.40 KN; the right section bending moment is 2.56KN m, the shearing force is 12.81KN, and the stretch bending resistance of the I-steel is calculated according to the formula 5.6.3 of the steel pipe scaffold safety technical specification:
21N/mm2<f=205N/mm2and the tensile bending strength of the I-steel meets the requirement. The shear strength of the solid-web member bent in the main plane is calculated according to the formula 4.1.2 of the design Specification of Steel Structure, and the design value of the shear strength is 16N/mm2<f=125N/mm2And the shear bending strength of the I-shaped steel meets the requirement. Calculated according to the formula 5.6.4 of the specification of the steel pipe scaffold to obtain the design value of the bending strength of the I-steel, namely 19.98N/mm2<f=215N/mm2And the integral stability of the I-shaped steel meets the requirement. The displacement is calculated by the structural mechanics diagram multiplication, and the vertical displacement of the outer end part of the I-shaped steel beam is 0.76mm<L/250=1300/250=5.2mm, which meets the requirements. Without a supporting structure, the bearing capacity of the I-shaped steel can meet the requirement of theoretically applying force of about 2.6 tons.
The above-mentioned embodiments are only preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention, and features in the embodiments and embodiments in the present application may be arbitrarily combined with each other without conflict, for example, a combination of a structure of the magnetorheological fluid and a structure of the multi-disc damping fin 1. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (10)
1. The utility model provides a cantilever beam connection structure which characterized by: the embedded part comprises embedded parts (1), wherein the embedded parts (1) are at least two embedded sleeves which are fixedly connected through a connecting plate so as to keep preset intervals and angles between the embedded sleeves;
one end of the embedded sleeve is used for being in threaded connection with a fixed welding screw rod (4) welded with embedded steel bars in the concrete (12), and the other end of the embedded sleeve is used for being in threaded connection with a connecting screw rod (6).
2. The cantilever beam connection structure according to claim 1, wherein: the embedded sleeves are arranged in parallel and fixedly connected through a plurality of parallel connecting plates (105);
the connecting screw rod (6) penetrates through a hole in a base plate (7) of the cantilever beam connecting structure and a base plate (8) to be connected with a nut, and the base plate (7) is fixedly connected with a beam rod (11).
3. The cantilever beam connection structure according to claim 1, wherein: the embedded sleeves are vertically overlapped and arranged in a crossed manner, the embedded sleeves are fixedly connected through a plurality of angle connecting plates (107), and the axes of the holes in the base plate (7) are correspondingly vertically overlapped and arranged in a crossed manner;
the connecting screw rod (6) penetrates through a hole in a base plate (7) of the cantilever beam connecting structure and a base plate (8) to be connected with a nut, and the base plate (7) is fixedly connected with a beam rod (11).
4. The cantilever beam connection structure according to any one of claims 1 to 3, wherein: one end of the embedded sleeve, which is close to the outer side of the concrete (12), is provided with a conical head (102), and one end of the embedded sleeve, which is close to the outer side of the concrete (12), is used for clinging to the inner side surface of the template (23).
5. The cantilever beam connection structure according to claim 4, wherein: one end of the embedded sleeve, which is close to the outer side of the concrete (12), is provided with a positioning ring (103), and the positioning ring is used for temporarily plugging a threaded hole of the embedded sleeve;
an indicating groove (104) is formed in the end face of one end, close to the outer side of the concrete (12), of the positioning ring (103), and the indicating groove (104) is filled with water-absorbing gel for absorbing water.
6. The cantilever beam connection structure according to claim 5, wherein: a bulge corresponding to the indication groove (104) is arranged on one surface of the base plate (7) close to the concrete (12).
7. The cantilever beam connection structure according to claim 3, wherein: the end of beam pole (11) be equipped with articulated seat (15), set firmly screw rod sleeve articulated seat (18) through built-in fitting (1) on concrete (12) of beam pole (11) below, articulated seat (15) and screw rod sleeve articulated seat (18) are articulated with a screw rod sleeve (16) respectively, two screw rod sleeves (16) and double-end screw (17) threaded connection, the screw thread of double-end screw (17) both ends is revolved to opposite direction.
8. The cantilever beam connection structure according to claim 3, wherein: the end of the beam rod (11) is provided with a connecting seat, a steel wire rope connecting seat (19) is fixedly arranged on concrete (12) above the beam rod (11) through an embedded part (1), the steel wire rope connecting seat (19) and the connecting seat are respectively connected with one end of a steel wire rope (20), the other end of the steel wire rope (20) is fixedly connected with a tensioning screw rod (21), the two tensioning screw rods (21) are respectively in threaded connection with two ends of a tensioning screw rod sleeve (22), and the thread turning directions of the two ends of the tensioning screw rod sleeve (22) are opposite.
9. The cantilever beam connection structure according to any one of claims 1 to 3 or 5 to 8, wherein: still be equipped with deformation monitoring safety device (5), deformation monitoring safety device (5) and bed plate (7) threaded connection, monitoring head (51) of deformation monitoring safety device (5) pass bed plate (7) and are connected with concrete (12) to monitor the distance change between bed plate (7) and concrete (12).
10. The cantilever beam connection structure according to claim 9, wherein: in the deformation monitoring safety device (5), a monitoring screw (57) is provided with an external thread, an LED lamp (54) is also arranged in the monitoring screw (57), and the LED lamp (54) is electrically connected with a battery (53);
the monitoring screw (57) is connected with the monitoring head (51) in a sliding way, and a spring (52) is arranged between the monitoring head (51) and the battery (53) so that the monitoring head (51) extends outwards and forms electric connection;
a fixed contact (56) is arranged in the monitoring screw (57), the fixed contact (56) is electrically connected with the LED lamp (54), and an elastic movable contact (55) is arranged on the monitoring head (51);
the fixed contact (56) is provided with a groove, the movable contact (55) is provided with a bulge, and a gap is arranged between the bulge and the groove.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114197251A (en) * | 2021-12-17 | 2022-03-18 | 中建八局第二建设有限公司 | Precast beam for rail transit and preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114197251A (en) * | 2021-12-17 | 2022-03-18 | 中建八局第二建设有限公司 | Precast beam for rail transit and preparation method |
| CN114197251B (en) * | 2021-12-17 | 2023-09-26 | 中建八局第二建设有限公司 | Precast beam for rail transit and preparation method |
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