CN215714705U - Continuous rigid frame hanging basket air back pressure construction device - Google Patents

Abstract

The utility model relates to the technical field of construction, in particular to a continuous rigid frame hanging basket air back pressure construction device which comprises a hanging basket main body and a prepressing mechanism which are respectively arranged on a box girder, and also comprises an anti-overturning mechanism, wherein the hanging basket main body comprises a main truss structure and a bottom basket structure, the main truss structure is arranged at the top of the box girder, the bottom basket structure is arranged at one side of the box girder, the bottom basket structure is connected with the end part of the main truss structure and is positioned below the main truss structure, the prepressing mechanism is arranged on the bottom basket structure, the anti-overturning mechanism comprises a walking safety mechanism, the walking safety mechanism is arranged at the top of the box girder, and the walking safety mechanism is in sliding connection with the bottom of the main truss structure; accomplish the overhead back pressure experiment to hanging the basket main part through increasing the mechanism of prepressing, increase simultaneously and prevent the mechanism of overturning, increase the holistic structural strength of hanging the basket, can test simultaneously when hanging basket back pressure experiment and prevent the structural stability of the mechanism of overturning, guarantee that its structural strength satisfies the demand, guarantee to hang basket overall stability and remove hanging the basket walking in-process.

Description

Continuous rigid frame hanging basket air back pressure construction device

Technical Field

The utility model relates to the technical field of construction, in particular to an air back pressure construction device for a continuous rigid frame hanging basket.

Background

The overhead back pressure of hanging basket is the important process of hanging and watering continuous steel structure hanging basket construction for confirm that the hanging basket bearing satisfies the designing requirement, eliminate inelastic deformation, the conventionality adopts concrete piece or steel to carry out the preloading of surcharge, the implementation time is of a specified duration, and is with high costs, the effect can not reach the expected effect, seriously influence the construction progress, and the hanging basket can dismantle the fixed connecting piece of back anchor before removing, singly can not ensure the stability of hanging basket when removing through the reversing buckle wheel when hanging basket removes this moment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a continuous rigid frame hanging basket air back pressure construction device, which solves the problem that a hanging basket back pressure structure in the prior art meets the experimental requirements but cannot ensure stable movement of a hanging basket.

The technical scheme for achieving the aim comprises the following steps: the utility model provides a continuous rigid frame hangs aerial back pressure construction equipment of basket, is including setting up string basket main part and the mechanism of prepressing on the case roof beam respectively, its characterized in that still including preventing the mechanism of overturning, it includes main truss structure and end basket structure to hang the basket main part, main truss structure sets up at the case roof beam top, end basket structure is established in one side of case roof beam, and end basket structure and the end connection of main truss structure lie in the below of main truss structure, prepressing the mechanism setting is structural at end basket, prevent the mechanism of overturning and include walking safety mechanism, walking safety mechanism sets up at the case roof beam top to walking safety mechanism and the bottom sliding connection of main truss structure.

Further inject, main purlin structure includes the lower tie rod that the bottom level set up, and the below of lower tie rod is provided with the walking track, and lower tie rod and walking track sliding connection, walking safety mechanism cover are established in the outside of tie rod down, and the upper surface and the contact of walking safety mechanism inner wall of lower tie rod, walking safety mechanism and walking track connection.

Further limiting, the prepressing mechanism comprises a telescopic device and a prepressing frame, the prepressing frame is fixedly connected with the side face of the box girder and is positioned between the lower flat rod and the bottom basket structure, the bottom end of the telescopic device is contacted with the bottom basket structure, and the top end of the telescopic device is contacted with the prepressing frame.

Further limiting, the walking safety mechanism comprises an upper counter-pressure beam and a lower counter-pressure beam connected with the upper counter-pressure beam, the upper counter-pressure beam is in contact with the lower flat rod, and the lower counter-pressure beam is connected with the walking track through a connecting piece.

Further inject, prevent structure of toppling still includes the bridging, hang basket main part interval setting at the top of case roof beam, two adjacent main truss structures are connected through the bridging.

Further inject, the walking track below is provided with the case roof beam, and the walking track is with the case roof beam upper surface anchor, the frame is connected with one side of case roof beam in advance, the one end and the case roof beam of end basket structure are connected, the other end and the end connection of main purlin structure of end basket structure.

Further limited, the included angle between the bottom basket structure and the horizontal direction is 0-40 degrees, and the telescopic device is arranged between the bottom basket structure and the pre-pressing frame along the vertical direction.

Further limiting, the front end of the lower flat rod is connected with the walking track in a sliding mode through a front support, and the rear end of the lower flat rod is connected with the walking track in a sliding mode through a reverse buckle wheel.

Further inject, the walking structure still includes drive arrangement, drive arrangement's stiff end and walking track are connected, and drive arrangement's output is connected with preceding support, and, the walking insurance mechanism is located between drive arrangement stiff end and the left-hand thread wheel.

Further, the driving device is a hydraulic oil cylinder.

The utility model has the beneficial effects that:

1. the hanging basket counter-pressure experiment device has the advantages that the pre-pressure mechanism is added to complete the air counter-pressure experiment on the hanging basket main body to obtain required data, the anti-overturning mechanism is added to increase the overall structural strength of the hanging basket, the structural stability of the anti-overturning mechanism can be tested simultaneously during the hanging basket counter-pressure experiment, the structural strength of the anti-overturning mechanism can be guaranteed to meet the use requirement, and the hanging basket can be guaranteed to move stably in the whole traveling process;

2. stability between two adjacent baskets is strengthened through the bridging, can satisfy the demand of setting for pressure through the jack.

Drawings

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of a walking safety mechanism and a lower flat bar according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a cross brace structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a travel safety mechanism according to an embodiment of the present invention;

in the figure: 11-a main truss structure; 111-lower flat bar; 12-bottom basket configuration; 131-a walking track; 21-a pre-pressing frame; 22-a telescopic device; 311-upper counter-pressure beam; 312-lower counter-pressure beam; 32-scissor-bracing.

Detailed Description

Referring to fig. 1 to 4, a continuous rigid frame hanging basket aerial back pressure construction device comprises a hanging basket main body, a pre-pressing mechanism and an anti-overturning mechanism, wherein the hanging basket main body comprises a main truss structure 11 and a bottom basket structure 12, the main truss structure 11 comprises a lower flat rod 111 horizontally arranged at the bottom, a walking track 131 and a driving device are arranged below the main truss structure 11, the pre-pressing mechanism comprises a pre-pressing frame 21 and a telescopic device 22, the anti-overturning mechanism comprises a walking safety mechanism and a shear brace 32, and the walking safety mechanism comprises an upper back pressure beam 311 and a lower back pressure beam 312 connected with the upper back pressure beam 311.

The main truss structures 11 are arranged on two sides of the top of the box girder in a bridging manner, two main truss structures 11 arranged at intervals are arranged on each side of the box girder in a bridging manner, two adjacent main truss structures 11 on the same side are connected through the cross braces 32, the cross braces 32 are connected with the rear pull rods in the main truss structures 11, the overall stability of the main truss structures 11 is improved, and meanwhile, the two main truss structures 11 are further fixed through the existing transverse parallel connection and the existing rear anchor parallel connection;

the bottom basket structure 12 comprises a cross beam and a longitudinal beam, the cross beam comprises a front lower cross beam and a rear lower cross beam which are arranged at intervals, the longitudinal beam comprises a web longitudinal beam and a bottom longitudinal beam which are laid on the front lower cross beam and the rear lower cross beam, the bottom longitudinal beam is laid between the web longitudinal beams, each longitudinal beam is compressed and fixed by 4 longitudinal beam pressing plates through bolts, and meanwhile, a pre-tightening force needs to be exerted, for example, an M20 bolt is selected for use, the pre-tightening force can be 101.5KN, the rear lower cross beam adopts double-spliced H600 type steel, the longitudinal beam adopts H400 type steel, the front lower cross beam is connected with the front upper cross beam on the main truss structure 11 through finish-rolled deformed steel bars and steel hanging strips in the prior art, the rear lower cross beam is connected with one side of the box girder, and the whole bottom basket structure 12 is 0-40 degrees with a horizontal included angle.

The pre-pressing frame 21 is positioned between the bottom basket structure 12 and the main truss structure 11, the pre-pressing frame 21 comprises two bracket inclined rods and two bracket cross rods, one ends of the bracket inclined rods and one ends of the bracket cross rods are fixedly connected, the bracket cross beams are positioned below the bracket inclined rods and the bracket cross rods can be made of HM588x300 section steel, the pre-pressing frame 21 and the box girder form a stable triangular structure, the other ends of the bracket inclined rods and the bracket cross rods are connected with one side of the box girder, and a steel plate can be pre-embedded in advance, when the pre-pressing frame 21 is installed, the pre-pressing frame is connected with the pre-buried steel plate in a welding mode, so that the pre-pressing frame is firm and stable, is convenient to disassemble and assemble, two pre-pressing frames 21 are arranged above each bottom basket structure 12, each pre-pressing frame 21 is positioned above the web longitudinal beam, a telescopic device 22 is arranged between the web longitudinal beam and the bracket cross rod along the vertical direction, the telescopic device 22 can be a jack, transverse pad beams perpendicular to the web longitudinal beams are laid on the web longitudinal beams, and the bottom ends of the telescopic devices 22 are arranged on the upper surfaces of the transverse pad beams.

The walking track 131 and the main truss structure 11 are correspondingly arranged on the upper surface of the box girder, the walking track 131 is anchored with the box girder through a steel bar pre-embedded on the upper surface of the box girder, the walking track 131 is in an I shape welded by a steel plate, the top end of a lower flat bar 111 in the main truss structure 11 is in sliding connection with the walking track 131 through a front support, the tail end of the lower flat bar 111 is in sliding connection with the walking track 131 through a reverse wheel, the reverse buckling wheels are located on two sides of the I-shaped steel plate of the walking track 131, the fixed end of a driving device is connected with the walking track 131, the output end of the driving device is connected with the main truss structure 11 through the front support, the fixed end of the driving device is connected with the walking track 131 through a flange clamping mechanism, and the driving device can select a pushing oil cylinder.

The traveling safety mechanism is located between the flange clamping mechanism and the left-hand thread wheel, when pre-pressing is conducted, the traveling safety mechanism is close to the flange clamping mechanism, the upper back-pressure beam 311 is in contact with the lower flat rod 111 below the upper back-pressure beam, the lower back-pressure beam 312 is in anchoring connection with the traveling rail 131 through a connecting piece, the connecting piece can be made of finish-rolled deformed steel bars, in the traveling stage, existing rear anchoring connection is removed, the traveling safety mechanism is installed close to the flange clamping mechanism, under the pushing of the driving device, the main truss structure 11 slowly moves forwards, the lower flat rod 111 slides forwards under the limiting of the left-hand thread wheel and the traveling safety mechanism until the left-hand thread wheel is close to the traveling safety mechanism, the traveling safety mechanism stops moving immediately, the traveling safety mechanism moves forwards after moving to be close to the flange clamping mechanism, the structure of the whole cradle is guaranteed to be more stable in the moving process, and overturning in the moving process is prevented.

The embodiment provided by the utility model comprises the following steps: the upper part of the main bridge adopts a prestressed concrete continuous box girder with a main span of 150m, the section of the box girder is the cross section of a single-box single-chamber straight ventral chamber, the top width of the box girder is 12.75m, the bottom width is 7m, the width of a flange plate is 2.875m, the height of a root beam is 9.5m, the thickness of a web plate is 90-50 cm, the thickness of a bottom plate is 32-120 cm, the thickness of a top plate is 30m, a 0# block of the box girder is constructed on a support (support) frame, the total length of a girder section is 13m, and the length of an edge and middle folding section is 2 m; the method comprises the following steps that a hanging basket cantilever casting box girder 1# to 6# block sections are 3.5m long, a 7# to 12# block section is 4m long, a 10# to 12# block section is 3.5m long, a 13# to 15# block section is 4m long, and a 16# to 17# block section is 4.5m long, diamond hanging baskets are adopted for box girder cantilever casting for construction, the length of a 0# block girder section of the box girder is 1 and 4m, the condition of the initial length of the hanging basket assembly is met, the length of the 1# to 5# block section of the box girder is 2.5m, the length of the 6# to 9# block section is 3m, the length of the 10# to 12# block section is 3.5m, the length of the 13# to 17# block section is 4.5m, the heaviest block section in the box girder of the cantilever casting is 1# block, and the weight is 221.5 t; the longest block is 13# block 4.5m long and has a weight of 155 t.

The weight of a single block is 221.5t (single), 5t is considered in construction load, template weight 12t, and unilateral weight is 238.5t, and according to pre-compaction standard weight not less than 120% of construction load, each unilateral weight is 286.2t, and loading gravity is 2862KN, wherein g is 10kg/N, and the effort of single oil top is: 2862KN/2 is 1431KN, and the degree of the pressure gauge is calculated through the existing oil top regression equation formula to control the loading weight.

During the concrete pouring of the cradle, the load is transmitted to the front and rear joists in the bottom basket structure 12 from the bottom plate template at the bottom plate position, then transmitted to the bridge deck main truss structure 11 and the bottom basket rear anchor by the sling and the distribution beam, and finally acts on the poured 0# block concrete, the pre-pressing load simulates and loads by the weight of the 1# block concrete with the largest weight, the arrangement form of the load is matched with the actual load distribution as far as possible, so that the reliability and the accuracy of the test are ensured, the cradle is loaded and pre-pressed in the span of the 1# block beam bottom plate by adopting the jack, namely, the reaction frame is arranged on the end face of the 0# block web plate, and the required pre-pressing load is applied by transmitting the reverse acting force to the cradle cross beam through the jack and the pre-pressing frame 21 distribution beam.

The working principle is as follows:

(1) the reaction frame construction embedded parts are embedded in the 0# block construction process, the embedded positions are arranged on the end face web plate of the 0# block, and 4 embedded parts are arranged on one side.

(2) And welding the pre-pressing frame 21 to ensure the welding quality.

(3) And arranging HM588x300 steel cross beams, jacks and the conventional I40I steel distribution beams at intervals, debugging the jacks and preparing before prepressing.

(4) And setting a hanging basket prepressing measurement control point, and carrying out measurement work before prepressing. The single side of the measuring control point is provided with 5 measuring control points which are respectively arranged at the corresponding positions of the box girder webs on the two sides of the front section of the 1# bottom plate, the center of the 1# bottom plate and the front hanging strips on the two sides of the hanging basket.

(5) And (3) mounting a jack, and carrying out hanging basket prepressing by loading in 4 stages (prepressing of 40%, 70%, 100% and 120%). After grading loading and holding the load for 5min, measuring a control point; after 120% of the full load, the load is kept for 5min, and control point measurement is carried out. During prepressing, two 1# blocks are simultaneously prepressed, and 2 sets of 500t jacks are used for prepressing.

(6) And carrying out control point measurement after unloading.

(7) And (4) removing the pre-pressing reaction frame of the hanging basket.

(8) And (4) carrying out sorting analysis on the cradle prepressing data to obtain cradle elastic deformation and non-elastic deformation, adjusting the elevation of a cradle bottom plate and guiding cradle construction.

When the whole hanging basket moves forwards after pre-pressing, the rear anchor connection at the rear end of the main truss structure 11 is detached, the walking safety mechanism is installed close to the flange clamping mechanism, the main truss structure 11 slowly moves forwards under the pushing of the driving device, the lower flat rod 111 slides forwards under the limiting of the reverse buckle wheel and the walking safety mechanism until the reverse buckle wheel is close to the walking safety mechanism, the movement is stopped immediately, the walking safety mechanism is moved to be close to the flange clamping mechanism and then continuously moves forwards, the structure of the whole hanging basket is ensured to be more stable in the moving process, and the hanging basket is prevented from overturning in the moving process.

Claims (10)

1. The utility model provides a continuous rigid frame hangs aerial back pressure construction equipment of basket, is including setting up string basket main part and the mechanism of prepressing on the case roof beam respectively, its characterized in that still including preventing the mechanism of overturning, it includes main purlin structure (11) and end basket structure (12) to hang the basket main part, main purlin structure (11) set up at the case roof beam top, end basket structure (12) are established in one side of case roof beam, and end basket structure (12) and the end connection of main purlin structure (11) are located the below of main purlin structure (11), the mechanism of prepressing sets up on end basket structure (12), prevent overturning the mechanism and include walking safety mechanism, walking safety mechanism sets up at the case roof beam top to the bottom sliding connection of walking safety mechanism and main purlin structure (11).

2. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 1, wherein the main truss structure (11) comprises a lower flat bar (111) with a horizontally arranged bottom, a walking track (131) is arranged below the lower flat bar (111), the lower flat bar (111) is connected with the walking track (131) in a sliding mode, a walking safety mechanism is sleeved on the outer side of the lower flat bar (111), the upper surface of the lower flat bar (111) is in contact with the inner wall of the walking safety mechanism, and the walking safety mechanism is connected with the walking track (131).

3. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 2, wherein the pre-pressing mechanism comprises a telescopic device (22) and a pre-pressing frame (21), the pre-pressing frame (21) is fixedly connected with the side face of the box girder, the pre-pressing frame (21) is located between the lower flat rod (111) and the bottom basket structure (12), the bottom end of the telescopic device (22) is in contact with the bottom basket structure (12), and the top end of the telescopic device (22) is in contact with the pre-pressing frame (21).

4. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 2, wherein the walking safety mechanism comprises an upper back pressure beam (311) and a lower back pressure beam (312) connected with the upper back pressure beam (311), the upper back pressure beam (311) is in contact with the lower flat rod (111), and the lower back pressure beam (312) is connected with the walking track (131) through a connecting piece.

5. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 3 or 4, characterized in that the overturn preventing structure further comprises cross braces (32), the hanging basket main bodies are arranged at intervals at the tops of the box girders, and two adjacent main truss structures (11) are connected through the cross braces (32).

6. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 5, characterized in that a box girder is arranged below the walking rail (131), the walking rail (131) is anchored with the upper surface of the box girder, the pre-pressing frame (21) is connected with one side of the box girder, one end of the bottom basket structure (12) is connected with the box girder, and the other end of the bottom basket structure (12) is connected with the end of the main truss structure (11).

7. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 6, characterized in that the included angle between the bottom basket structure (12) and the horizontal direction is 0-40 degrees, and the telescopic device (22) is arranged between the bottom basket structure (12) and the pre-pressing frame (21) along the vertical direction.

8. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 7, wherein the front end of the lower flat rod (111) is connected with the walking track (131) in a sliding mode through a front support, and the rear end of the lower flat rod (111) is connected with the walking track (131) in a sliding mode through a back-buckling wheel.

9. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 8, characterized in that a driving device is arranged on the walking track (131), the fixed end of the driving device is connected with the walking track (131), the output end of the driving device is connected with the front support, and the walking safety mechanism is positioned between the fixed end of the driving device and the back-buckling wheel.

10. The continuous rigid frame hanging basket aerial back pressure construction device according to claim 9, wherein the driving device is a hydraulic oil cylinder.

Images