CN212052336U

CN212052336U - Detachable lifting lug for vertical lifting of assembled bridge pier stud and bracket-free mounting of cover beam and bracket-free mounting platform of cover beam

Info

Publication number: CN212052336U
Application number: CN201922434925.8U
Authority: CN
Inventors: 宋琢; 陆文胜; 张迪; 王贤鹏; 张文科
Original assignee: GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD
Current assignee: GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-12-01
Anticipated expiration: 2029-12-30

Abstract

The invention relates to a detachable lifting lug for vertical hoisting of an assembled bridge pier stud and bracket-free mounting of a bent cap, which comprises an embedded part, a main lifting lug member and a high-strength bolt; the embedded part comprises embedded steel bars, an embedded bottom plate and nuts, the embedded steel bars are welded on the rear side surface of the embedded bottom plate, and the nuts are welded on the rear side surface of the embedded bottom plate; the main lifting lug component comprises a detachable top plate, an ear plate and a stiffening plate, the ear plate is welded on the front side surface of the detachable top plate, and the stiffening plate is arranged between the ear plate and the detachable top plate; all be equipped with the mounting hole on pre-buried bottom plate and the detachable roof, the high strength bolt passes the mounting hole and is connected with the nut, and is fixed with pre-buried bottom plate and detachable roof. Still relate to bent cap and exempt from support mounting platform. The invention has convenient assembly and disassembly and safe use, the main lifting lug component can be disassembled for reuse, the energy is saved, the environment is protected, the embedded part is also used as a lightning protection grounding part, and the main lifting lug component is also used as a steel platform mounting fulcrum, belonging to the technical field of bridge engineering assembly.

Description

Detachable lifting lug for vertical lifting of assembled bridge pier stud and bracket-free mounting of cover beam and bracket-free mounting platform of cover beam

Technical Field

The invention relates to the technical field of bridge engineering assembly, in particular to a detachable lifting lug for vertical hoisting of an assembled bridge pier stud and bracket-free mounting of a bent cap, and further relates to a bracket-free mounting platform of the bent cap.

Background

With the development of building construction technology and social economy, the construction field is pursuing green construction, industrialization and industrialization. The prefabricated assembly type construction technology is characterized in that construction structural members are manufactured in a factory and transported to a construction site, and then hoisting and splicing are completed. The prefabricated construction has short construction period, low time cost, small interference to construction sites and low requirements on site construction conditions, and gradually becomes the development trend of building construction at present.

The detachable lifting lug is widely used for hoisting prefabricated parts, is an important connecting part in the transportation, disassembly and hoisting of equipment, large and heavy steel members and is directly related to the safety of the equipment, the members, the human body and the like in the hoisting. Play very important effect in hoist and mount, can dismantle the lug application and mainly consider large-scale steel member, the frequency of the hoist and mount in-process use of equipment, to the destructiveness of steel member self structure, the aspect such as performance of equipment and component, component or equipment itself do not need often to use the lug, or set up the lug at the lifting point and because of the structure and the use that influence the component, need to amputate it after the lug uses, the back chipping, polish, processing such as touch-up paint, not only extravagant manpower, material resources, and there is the influence of certain degree to the integrality and the aesthetic property of component and equipment.

There is detachable lug structure among the prior art, directly installs the lug in the structure through the screw, and the direct screw in structure of screw, this kind of structure has the potential safety hazard because of directly having the screw in structure. Meanwhile, the lifting lug has a single function and can be detached after being used.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention aims to: the detachable lifting lug is simple in structure and safe to use, is used for vertically lifting assembled bridge piers and is used for installing a cover beam without a bracket.

The invention also aims to provide a bracket-free mounting platform for the cover beam by taking the detachable lifting lug as a fulcrum.

In order to achieve the purpose, the invention adopts the following technical scheme:

the detachable lifting lug is used for vertically lifting the assembled bridge pier stud and installing the bent cap without a bracket and comprises an embedded part, a main lifting lug component and a high-strength bolt; the embedded part comprises embedded steel bars, an embedded bottom plate and nuts, the embedded steel bars are welded on the rear side surface of the embedded bottom plate, and the nuts are welded on the rear side surface of the embedded bottom plate; the main lifting lug component comprises a detachable top plate, an ear plate and a stiffening plate, the ear plate is welded on the front side surface of the detachable top plate, and the stiffening plate is arranged between the ear plate and the detachable top plate; mounting holes are formed in the embedded bottom plate and the detachable top plate, and the high-strength bolt penetrates through the mounting holes to be connected with the nut, so that the embedded bottom plate and the detachable top plate are fixed; the length of the nut corresponds to the length of the high-strength bolt matched with the nut.

Preferably, the embedded steel bars are smooth round steel bars and are bent into a shape like a Chinese character 'ji'; the number of the embedded steel bars is not less than two, and the embedded steel bars are arranged in parallel.

Preferably, the nuts include a set of long nuts and a set of short nuts, and correspondingly, the high-strength bolts include a set of long bolts and a set of short bolts; the long nuts are arranged at four corners of the rectangular embedded bottom plate.

Preferably, the number of the ear plates is two, the ear plates are vertically arranged along the front and back direction, and the two ear plates are arranged left and right and are parallel to each other; the upper edge of the ear plate is a horizontal straight edge.

Preferably, the steel bar is HPB300 steel bar, the diameter is not less than 25 mm; the thickness of the embedded bottom plate and the detachable top plate is not less than 10 mm.

Preferably, after the main lifting lug component is used and removed, the exposed surface of the embedded bottom plate is galvanized, and the embedded bottom plate is used as a lightning protection grounding part.

Preferably, the stiffening plates are triangular, and two stiffening plates are arranged on the outer side of each ear plate.

Preferably, the mounting hole is provided with an internal thread for engagement with the high-strength bolt.

The bent cap bracket-free mounting platform is built between two bridge pier columns which are arranged side by side left and right; the front side and the rear side of each bridge pier are provided with equal-height lifting lugs which are detachable; the steel platform is arranged on the upper edge of the ear plate.

Preferably, the steel platform comprises I-shaped steel, channel steel, steel plates and guardrails; the I-shaped steel extends along the left and right directions, is erected on lifting lugs of the left and right bridge pier columns and is fixed by welding, and the I-shaped steel is arranged on the front side and the rear side of each bridge pier column; the channel steel extends along the front and back direction and is lapped between the front I-steel and the back I-steel, and the channel steel is parallel to each other; the steel plate is laid above the channel steel; the guardrail sets up the top at the steel sheet.

The principle of the invention is as follows:

on the premise of not influencing the strength of the member or equipment, the embedded part is embedded in the bridge pier stud, the detachable main lifting lug member and the embedded part are combined by using a high-strength bolt, the main lifting lug member is detached after the hoisting is finished, and the main lifting lug member is recycled. Meanwhile, the conventional prefabricated bent cap needs to be erected with a support, and a steel platform is erected above the support for construction. This mounting platform can directly set up the steel platform at the otic placode upper edge to this construction platform has reduced construction cost as the required operation space of installation bent cap, is particularly useful for inconveniently setting up the region of support construction.

The invention has the following advantages:

1. the embedded part is adopted, and the embedded part is screwed in or out through the high-strength bolt for assembly and disassembly, so that the operation is convenient, and the safety and the reliability are realized.

2. The embedded steel bars are bent into a shape like a Chinese character ji, so that the connection is firmer, safe and reliable.

3. The upper edge of the ear plate is a horizontal straight edge and is used for being stably connected with the steel platform.

4. The exposed part of the embedded part can be galvanized after the engineering is finished, can be used for lightning protection grounding and can prevent electrochemical corrosion of pier stud reinforcing steel bars.

5. The bent cap support-free mounting platform is mounted through the lifting lugs, is simple in structure and suitable for areas where field conditions are not suitable for building support construction.

6. The embedded part is used as a lifting lug connecting piece and also used as a lightning protection grounding part; the main lifting lug component is used as a lifting lug connecting piece and also used as a steel platform mounting fulcrum; simple structure but the function is various.

7. The main lifting lug component can be detached for reuse, and is energy-saving and environment-friendly.

Drawings

Figure 1 is an exploded view of a removable shackle.

Figure 2 is an assembly view of a removable shackle.

Fig. 3 is a use state diagram of the detachable lifting lug as a lifting lug.

Fig. 4 is a use state diagram of the detachable lifting lug as a steel platform mounting fulcrum.

Wherein, 1 is the built-in fitting, 2 is main lug component, 3 is high strength bolt, 4 is embedded reinforcing bar, 5 is embedded bottom plate, 6 is detachable roof, 7 is the otic placode, 8 is the stiffening plate, 9 is hoist cable or break out, 10 is the bridge pier stud, 11 is the I-steel, 12 is the channel-section steel, 13 is the steel sheet.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

The utility model provides a detachable lug that is used for vertical lifting by crane of assembled bridge pier stud and bent cap to exempt from support mounting, includes built-in fitting 1, main lug component 2, high strength bolt 3.

The concrete structure is as follows:

as shown in fig. 1 and 2, the embedded part 1 includes embedded bars 4, an embedded base plate 5, and nuts, the embedded bars are welded on the rear side of the embedded base plate, and the nuts are welded on the rear side of the embedded base plate. Smooth round steel bar is the model and is HPB300 reinforcing bar, and the diameter should be not less than 25mm, and 2 should be no less than to reinforcing bar quantity to guarantee that sufficient shear strength when pier stud lifts by crane. The smooth round steel bar is shaped like a Chinese character 'ji', and the contact part of the Chinese character 'ji' and the embedded bottom plate is welded on two sides. The smooth round steel bar is shaped like a Chinese character 'ji', so that the mechanical engaging force of the smooth round steel bar and concrete can be increased. The plain steel bars can be welded with the pier stud reinforcement cage according to the situation. The matched nuts are welded on the embedded bottom plate in a surrounding mode or in an electric welding mode.

The main lifting lug component 2 comprises a detachable top plate 6, an ear plate 7 and a stiffening plate 8, wherein the ear plate is welded on the front side surface of the detachable top plate, and the stiffening plate is arranged between the ear plate and the detachable top plate. The lower edge of each lug plate is arc-shaped, the upper edge of each lug plate is horizontal, the number of the lug plates is two, and the thickness of each lug plate is determined according to the hoisting weight and the mounting load of the cover beam. A steel platform can be erected at the horizontal position of the upper edge of the lug plate, and an operation space is provided for upper structure construction. The ear holes of the ear plates should meet the requirement of the sling to pass through, and the diameter of the ear holes should be larger than the diameter of the pin shaft of the shackle 9 or larger than the diameter of the sling 9. The stiffening plates are triangular, 2 stiffening plates are arranged on the outer side of each ear plate, and enough hoisting space is reserved for the size and the position of each stiffening plate. The main lifting lug component is welded and connected by fillet welds, single V-shaped grooves are formed in the main lifting lug component, and the thickness and the length of the weld are determined according to the hoisting weight and the installation load of the cover beam.

The high-strength bolts are full-thread outer hexagon bolts and are arranged around the embedded bottom plate and the detachable top plate, the total number of the high-strength bolts is 8, the bolts at four corners are properly lengthened, and the nuts are also properly lengthened along with the lengthening of the screw rods, so that the bonding force between the embedded part and the concrete can be increased. The matched nuts are welded around or spot-welded on the embedded bottom plate, and when the diameter of the bolt is small, the steel gasket can be used as required.

The embedded bottom plate and the detachable top plate are drilled and punched at the positions of 8 bolts and are turned to form mounting holes, the thread specifications of the positions of 8 hole positions are the same as those of nuts, so that the anchoring strength of the bolts can be increased, and the embedded parts and the detachable main lifting lug component are ensured to be sufficiently fixed.

The installation mode is as follows:

the embedded part is formed by welding a reversed U-shaped smooth round steel bar and an embedded bottom plate, and the two sides of the embedded part are welded with fillet without beveling. And the nut is welded on the rear side surface of the embedded bottom plate in a spot welding or girdling manner. The main lifting lug component is formed by welding a detachable top plate, an ear plate and a stiffening plate, and is welded in a surrounding way and provided with a single V-shaped groove. And carrying out penetration detection on the welding seam after welding. And the other welding connections are fillet weld connections, single V-shaped grooves are formed, and the thickness and the length of the weld are determined according to the hoisting weight and the mounting load of the cover beam.

The number of the plain steel bars is at least two, the plain steel bars are welded with the pier stud reinforcement cage when the embedded parts are embedded, and the embedded bottom plate is welded with the pier stud reinforcement cage. After the embedded part is installed, the mounting holes of the nuts and the embedded bottom plate are plugged by adhesive tapes, and concrete is prevented from entering the screw holes when the pier stud is poured.

And (4) maintaining the pier stud after pouring is finished, taking out the adhesive tape after the lifting strength is reached, and connecting the embedded part and the main lifting lug component by using a high-strength bolt.

As shown in fig. 3, the detachable lifting lug is applied to the vertical lifting of the fabricated bridge pier stud, a sling or a shackle pin penetrates through an ear hole of an ear plate, and the lifting equipment is started to lift the assembled bridge pier stud.

As shown in fig. 4, in the application of the detachable lifting lug in the installation of the bent cap of the fabricated bridge, i-beams 11 are erected at the upper edges of the ear plates of the pier studs on the left and right sides along the transverse bridging direction, the front and the rear i-beams are totally two i-beams, the i-beams and the ear plates of the main lifting lug component are welded, channel steel 12 is laid above the i-beams along the bridging direction, steel plates 13 are laid above the channel steel, guardrails are arranged around the platform, and the erection of the bent cap installation platform is completed. The mounting platform does not need to additionally erect the bent cap support, and is particularly suitable for areas where field conditions are not suitable for erecting the construction of the support.

And after the bent cap is installed, the operation platform is dismantled, the high-strength bolt is unscrewed, and the main lifting lug component is dismantled. And recycling the main lifting lug component. The exposed surface of the embedded part is galvanized, the embedded part can be used for lightning protection grounding, and the galvanizing can prevent the reinforcement cage from electrochemical corrosion.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. A detachable lug for assembled bridge pier stud is vertically lifted by crane and bent cap exempts from support mounting, its characterized in that: the high-strength lifting lug structure comprises an embedded part, a main lifting lug member and a high-strength bolt; the embedded part comprises embedded steel bars, an embedded bottom plate and nuts, the embedded steel bars are welded on the rear side surface of the embedded bottom plate, and the nuts are welded on the rear side surface of the embedded bottom plate; the main lifting lug component comprises a detachable top plate, an ear plate and a stiffening plate, the ear plate is welded on the front side surface of the detachable top plate, and the stiffening plate is arranged between the ear plate and the detachable top plate; mounting holes are formed in the embedded bottom plate and the detachable top plate, and the high-strength bolt penetrates through the mounting holes to be connected with the nut, so that the embedded bottom plate and the detachable top plate are fixed; the length of the nut corresponds to the length of the high-strength bolt matched with the nut.

2. The detachable lifting lug for vertical hoisting of assembled bridge pier stud and bracket-free mounting of cap beam according to claim 1, characterized in that: the embedded steel bars are smooth round steel bars and are bent into a shape like a Chinese character 'ji'; the number of the embedded steel bars is not less than two, and the embedded steel bars are arranged in parallel.

3. The detachable lifting lug for vertical hoisting of assembled bridge pier stud and bracket-free mounting of cap beam according to claim 1, characterized in that: the nuts comprise a group of long nuts and a group of short nuts, and the corresponding high-strength bolts comprise a group of long bolts and a group of short bolts; the long nuts are arranged at four corners of the rectangular embedded bottom plate.

4. The detachable lifting lug for vertical hoisting of assembled bridge pier stud and bracket-free mounting of cap beam according to claim 1, characterized in that: the number of the ear plates is two, the ear plates are vertically arranged along the front and back direction, and the two ear plates are arranged left and right and are parallel to each other; the upper edge of the ear plate is a horizontal straight edge.

5. The detachable lifting lug for vertical hoisting of assembled bridge pier stud and bracket-free mounting of cap beam according to claim 2, characterized in that: the steel bars are HPB300 steel bars, and the diameter of the steel bars is not less than 25 mm; the thickness of the embedded bottom plate and the detachable top plate is not less than 10 mm.

6. The detachable lifting lug for vertical hoisting of assembled bridge pier stud and bracket-free mounting of cap beam according to claim 1, characterized in that: after the main lifting lug component is used and removed, the exposed surface of the embedded bottom plate is galvanized, and the embedded bottom plate is used as a lightning protection grounding part.

7. The detachable lifting lug for vertical hoisting of assembled bridge pier stud and bracket-free mounting of cap beam according to claim 1, characterized in that: the stiffening plates are triangular, and two stiffening plates are arranged on the outer side of each ear plate.

8. The detachable lifting lug for vertical hoisting of assembled bridge pier stud and bracket-free mounting of cap beam according to claim 1, characterized in that: the mounting hole is provided with an internal thread matched with the high-strength bolt.

9. The utility model discloses a bracket mounting platform is exempted from to bent cap, its characterized in that: the bridge pier is built between two bridge pier columns which are arranged side by side left and right; lifting lugs with the same height are arranged on the front side and the rear side of the bridge pier stud, and the lifting lugs are detachable lifting lugs according to any one of claims 1 to 8; the steel platform is arranged on the upper edge of the ear plate.

10. The capping beam bracket-free mounting platform of claim 9, wherein: the steel platform comprises I-shaped steel, channel steel, steel plates and guardrails; the I-shaped steel extends along the left and right directions, is erected on lifting lugs of the left and right bridge pier columns and is fixed by welding, and the I-shaped steel is arranged on the front side and the rear side of each bridge pier column; the channel steel extends along the front and back direction and is lapped between the front I-steel and the back I-steel, and the channel steel is parallel to each other; the steel plate is laid above the channel steel; the guardrail sets up the top at the steel sheet.