CN110817690B

CN110817690B - Transmission and hoisting method

Info

Publication number: CN110817690B
Application number: CN201810889361.4A
Authority: CN
Inventors: 陶利; 贾尚华; 王琰; 何拥军; 金志新
Original assignee: Shanghai Road and Bridge Group Co Ltd
Current assignee: Shanghai Road and Bridge Group Co Ltd
Priority date: 2018-08-07
Filing date: 2018-08-07
Publication date: 2020-11-03
Anticipated expiration: 2038-08-07
Also published as: CN110817690A

Abstract

The invention provides a transmission and hoisting method, which is used for hoisting a step plate of a prefabricated staircase at an entrance and an exit of a subway station, wherein the step plate is provided with a first hoisting point and a second hoisting point, and the transmission and hoisting method comprises the following steps: step S1: the first hoisting hoist is connected to the first hoisting point, the second hoisting hoist is connected to the second hoisting point, and the first hoisting hoist and the second hoisting hoist are respectively fixed on the inclined top plates of the entrance and the exit; step S2: a third hoisting hoist is connected to the second hoisting point and fixed on the inclined top plate; step S3: loosening the second hoisting hoist to enable the ladder plate to move towards the inside of the entrance, dismounting the second hoisting hoist, connecting the second hoisting hoist to the first hoisting point, and fixing the second hoisting hoist on the inclined top plate; step S4: and loosening and dismounting the first hoisting hoist. The hoisting method provided by the invention can greatly reduce the difficulty of hoisting the stair boards of the prefabricated stairs at the entrance and exit of the subway station, is convenient for the construction of workers, and improves the construction efficiency and the construction effect.

Description

Transmission and hoisting method

Technical Field

The invention relates to the field of subway construction, in particular to a hoisting method.

Background

The prefabricated structure has the excellent characteristics of energy conservation, environmental protection, strong industrialization and standardization and the like, is widely popularized in overground civil buildings, but has the characteristics of high seepage-proofing requirement of large-scale underground engineering, heavy weight of structural members, high construction difficulty of underground engineering and the like, and is difficult to construct in the prefabricated structure for developing underground engineering, so that the subway station mainly adopts a cast-in-place concrete structure form.

In recent years, the prefabricated structure is popularized in large areas in civil engineering, various advantages of the prefabricated structure are fully played, the prefabricated structure is fully developed in the civil engineering, and the development of the prefabricated structure of the subway station is also driven. The subway station stair, the station platform plate and other structures are prefabricated and assembled, and the prefabricated stair and the prefabricated station platform plate have large development space in the subway station along with the development of the technology.

Of course, the engineering geological problems encountered in subway station construction are relatively more, and construction cautions are more than other industrial and civil engineering, so that the construction difficulty of the subway station is increased. In the construction process, various prefabricated structures and components are arranged after the structure is capped, so that the hoisting problem of the prefabricated components is particularly difficult to present.

Disclosure of Invention

The invention aims to overcome the defect that the hoisting construction of a slope section prefabricated staircase at a top-sealed subway station entrance and exit is difficult in the prior art, and provides a hoisting method.

The invention solves the technical problems through the following technical scheme:

a method for lifting a step plate of a prefabricated staircase at an entrance and an exit of a subway station, wherein the step plate is provided with a first lifting point and a second lifting point, and the method for lifting comprises the following steps:

step S1: the first hoisting point is connected with a first hoisting hoist, the second hoisting point is connected with a second hoisting hoist, and the first hoisting hoist and the second hoisting hoist are respectively fixed on the inclined top plates of the entrance and the exit;

step S2: connecting a third hoisting hoist to the second hoisting point, and fixing the third hoisting hoist on the inclined top plate;

step S3: loosening a second hoisting hoist to enable the ladder plate to move towards the inside of the entrance, dismounting the second hoisting hoist, connecting the second hoisting hoist to the first hoisting point, and fixing the second hoisting hoist on the inclined top plate;

step S4: and loosening and unloading the first hoisting hoist.

In the method, the first hoisting hoist, the second hoisting hoist and the third hoisting hoist are used for hoisting the step plate from the outer position to the inner position of the access opening of the subway station, so that the step plate can be transported without depending on hoisting mechanical equipment (such as a crane), the difficulty of hoisting the step plate of the prefabricated staircase at the access opening of the subway station is greatly reduced, the method can be suitable for most occasions with closed spaces, and the efficiency and the effect of site construction are facilitated.

Preferably, in the method for conveying and hoisting according to the present invention, before the step S1, the method further includes the step S0: the step is transported to the doorway by a crane.

In the method, the step is firstly conveyed by the crane, so that manpower and material resources are saved.

Preferably, in the hoisting method of the present invention, the step S0 includes:

step S01: the first hoisting point is connected with a sling of the crane, the second hoisting point is connected with the first hoisting hoist, and the first hoisting hoist is fixed on the sling of the crane;

step S02: the second hoisting hoist is connected to the second hoisting point and fixed to the inclined top plate;

step S03: loosening the first hoisting hoist to enable the ladder board to move towards the inside of the entrance, dismounting the first hoisting hoist, connecting the first hoisting hoist to the first hoisting point, and fixing the first hoisting hoist on the inclined top plate;

step S04: the sling is loosened and taken off.

In the method, the first hoisting hoist and the second hoisting hoist are firstly utilized and matched with the sling to hoist the ladder plate to the entrance and exit in advance, so that the steps of putting down and hoisting the ladder plate again are omitted, manpower and material resources are saved, the construction efficiency is improved, the position can be directly calibrated, the position deviation of the ladder plate after putting down and hoisting again is avoided, and the construction effect is improved.

Preferably, in the method for conveying and hoisting according to the present invention, after the step S4, the method for conveying and hoisting further includes the step S5: repeating the steps S2 to S4 until the stair tread reaches above two adjacent stair posts arranged below the inclined top plate.

In the method, the step is repeated from the step of 2 to the step of S4, the step is transferred from the entrance to the inside of the entrance of the subway station, thereby being conveniently hoisted between the deepest stairway columns of the entrance of the subway station.

Preferably, in the method for conveying and hoisting according to the present invention, after the step S5, the method for conveying and hoisting further includes the step S6: and loosening the second hoisting hoist and the third hoisting hoist to enable the stair boards to be erected between the two adjacent stair columns, and dismounting the second hoisting hoist and the third hoisting hoist.

In the method, the second hoisting hoist and the third hoisting hoist are utilized to slowly put down the step boards with larger mass between two adjacent step posts at a constant speed, so that the step boards are protected from being damaged, constructors are protected from being hit by the step boards, and personal safety is guaranteed.

Preferably, in the method for transferring crane of the present invention, the step S6 includes adjusting the relative position between the step plate and the two stair posts.

In the method, the position of the stair plates is adjusted to align the central axes of the stair plates with the connecting line of the central axes of the two stair posts.

Preferably, in the hoisting method of the present invention, the inclined top plate is provided with a plurality of fixing points, and the first hoisting hoist, the second hoisting hoist and the third hoisting hoist are respectively fixed to two adjacent fixing points.

In the method, a plurality of fixed points are arranged, so that a worker can conveniently hang the first hoisting hoist, the second hoisting hoist and the third hoisting hoist, and the step can be accurately erected between the two stair posts.

Preferably, in the method for transporting and hanging the present invention, the space between two adjacent stair posts arranged below the inclined ceiling plate has two fixing points.

In the method, the stair plates are favorably and accurately conveyed to be directly over the two stair posts, and the construction effect of workers is improved.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

the hoisting method provided by the invention can greatly reduce the difficulty of hoisting the stair boards of the prefabricated stairs at the entrance and exit of the subway station, is convenient for the construction of workers, and improves the construction efficiency and the construction effect.

Drawings

Fig. 1 is a flowchart illustrating steps of a method for hoisting according to an embodiment of the present invention.

Fig. 2 is a detailed flowchart of step S0 in the hoisting method according to an embodiment of the present invention.

Fig. 3(a) to 3(k) are schematic views illustrating a construction process of hoisting a step plate of a prefabricated staircase at an entrance and an exit of a subway station by using a transfer hoisting method according to an embodiment of the present invention.

Description of reference numerals:

step 10

First lifting point 11

Second lifting point 12

Sling 20

First hoist block 30

Second hoist 40

Third hoist 50

Inclined top plate 60

First hook 70

Second hook 80

Stair railing 90

Detailed Description

The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1 and fig. 2 and fig. 3(a) to fig. 3(k), the embodiment of the present invention discloses a flow chart of steps and a construction process diagram of a method for transferring and hoisting.

Referring to fig. 1, the method for lifting a step 10 of a prefabricated staircase at an entrance of a subway station includes:

step S0: the riser 10 is transported to the doorway by a crane.

Step S1: a first hoisting hoist 30 is connected to the first hoisting point 11, a second hoisting hoist 40 is connected to the second hoisting point 12, and the first hoisting hoist 30 and the second hoisting hoist 40 are respectively fixed on the inclined top plate 60 of the entrance;

step S2: a third hoisting hoist 50 is connected to the second hoisting point 12, and the third hoisting hoist 50 is fixed on the inclined top plate 60;

step S3: loosening the second hoisting hoist 40 to enable the ladder board 10 to move towards the inside of the entrance, dismounting the second hoisting hoist 40, connecting the second hoisting hoist 40 to the first hoisting point 11, and fixing the second hoisting hoist 40 on the inclined top plate 60;

step S4: the first hoist 30 is released and unloaded.

Step S5: steps S2 to S4 are repeated until the flight 10 reaches above two adjacent stair posts 90 provided below the slanted top plate 60.

Step S6: and (3) loosening the second hoisting hoist 40 and the third hoisting hoist 50 to enable the stair boards 10 to be erected between two adjacent stair columns 90, and dismounting the second hoisting hoist 40 and the third hoisting hoist 50.

In the method, the step boards 10 are firstly conveyed by using the crane, so that manpower and material resources are saved. The step plates 10 are lifted from the outer position of the entrance and the exit of the subway station to the inner position of the entrance and the exit of the subway station without depending on lifting mechanical equipment (such as a crane), the step plates 10 can be carried, the difficulty of lifting the step plates 10 of the prefabricated staircase at the entrance and the exit of the subway station is greatly reduced, the prefabricated staircase can adapt to the occasions of most closed spaces, and the efficiency and the effect of site construction are facilitated. Then, by repeating the steps S2 to S4, the step floors 10 are transferred from the entrance to the inside of the entrance of the subway station, thereby being conveniently hoisted between the stair posts 90 deepest in the entrance of the subway station. Finally, the second hoisting hoist 40 and the third hoisting hoist 50 are used for slowly lowering the stair treads 10 with large mass between the two adjacent stair posts 90 at a constant speed, so that the stair treads 10 are protected from being damaged, constructors are protected from being hit by the stair treads 10, and personal safety is guaranteed.

Referring to fig. 2, step S0 includes:

step S01: a sling 20 of a crane is connected to the first lifting point 11, a first hoisting hoist 30 is connected to the second lifting point 12, and the first hoisting hoist 30 is fixed to the sling 20 of the crane;

step S02: a second hoisting hoist 40 is connected to the second hoisting point 12, and the second hoisting hoist 40 is fixed on the inclined top plate 60;

step S03: loosening the first hoisting hoist 30 to enable the ladder board 10 to move towards the inside of the entrance, dismounting the first hoisting hoist 30, connecting the first hoisting hoist 30 to the first lifting point 11, and fixing the first hoisting hoist 30 on the inclined top plate 60;

step S04: the sling 20 is loosened and removed.

In the method, the first hoisting hoist 30 and the second hoisting hoist 40 are firstly utilized and matched with the sling 20 to hoist the ladder board 10 to the entrance and exit, so that the steps of putting down and hoisting the ladder board 10 again are omitted, manpower and material resources are saved, the construction efficiency is improved, the position can be directly calibrated, the position deviation of the ladder board 10 after putting down and hoisting again is avoided, and the construction effect is improved.

Step S6 includes adjusting the relative position between the step 10 and the two stair posts 90 so that the central axis of the step 10 is aligned with the line connecting the central axes of the two stair posts 90.

The inclined top plate 60 is provided with a plurality of fixing points, and the first hoisting hoist 30, the second hoisting hoist 40 and the third hoisting hoist 50 are respectively fixed on two adjacent fixing points. The lifting hooks are respectively arranged on the fixed points, and a plurality of fixed points provided with the lifting hooks are arranged, so that a worker can conveniently hang the first lifting hoist 30, the second lifting hoist 40 and the third lifting hoist 50, and the ladder plate 10 can be accurately erected between the two stair posts 90.

Further, two fixing points are provided in the space between two adjacent stair posts 90 provided below the slanted ceiling plate 60. Therefore, the stair plates 10 can be accurately conveyed to the positions right above the two stair posts 90, and the construction effect of workers is improved.

Referring to fig. 3(a) to 3(k), in an actual construction process, a worker hoists the step 10 to a target position according to the following procedures:

the first step is as follows: as shown in fig. 3(a), firstly, the step board 10 of the prefabricated staircase is hoisted to the exit position of the entrance by using a crane, wherein the first hoisting point 11 of the step board 10 is connected with the hoist rope 20 of the crane, the second hoisting point 12 of the step board 10 is connected with the first hoisting block 30, and the other end of the first hoisting block 30 is fixed on the hoist rope 20 of the crane.

The second step is that: as shown in fig. 3(b), the second hoist 40 is added and gradually tightened at the second lifting point 12 of the ladder board 10, and the second hoist 40 is connected to the first hook 70 mounted on the sloping roof panel 60 near the exit of the doorway.

The third step: as shown in fig. 3(c), the first hoist 30 is released to gradually adjust the position of the step 10.

The fourth step: as shown in fig. 3(d), the first hoist 30 is detached, and the first hoist 30 is connected to the first lifting point 11 of the step 10 and the first hook 70.

The fifth step: as shown in fig. 3(e), the first hoist 30 is tightened again, and the hoist rope 20 of the hoist is loosened, and finally the hoist rope 20 of the hoist is discharged.

And a sixth step: as shown in fig. 3(f), the third hoist 50 is connected to the second lifting point 12 and the second hook 80 mounted on the sloping roof plate 60 closer to the inside of the doorway adjacent to the first hook 70, and the third hoist 50 is tightened.

The seventh step: as shown in fig. 3(g), the second hoist 40 is released to adjust the position of the step 10, so that the step 10 further enters the inside of the doorway.

Eighth step: as shown in fig. 3(h), the second hoist 40 is continuously released and finally the second hoist 40 is unloaded, and then the second hoist 40 is connected to the first lifting point 11 and the second lifting hook 80 of the step 10.

The ninth step: as shown in fig. 3(i), the first hoist 30 is released, and finally the first hoist 30 is unloaded.

The tenth step: as shown in fig. 3(j), the sixth step to the ninth step are repeated, and the step boards 10 are respectively hoisted by the first hoisting hoist 30, the second hoisting hoist 40 and the third hoisting hoist 50 through the lifting hooks closer to the interior of the doorway until the step boards 10 reach the upper parts of the two stair posts 90 at the target position.

The eleventh step: as shown in fig. 3(k), each hoist is adjusted to lower the step 10 onto two stair posts 90, all hoists are removed, and the step 10 is reinforced, and finally the hoisting construction is completed.

According to the transmission hoisting method disclosed by the embodiment, the problem of how to hoist the stair slabs 10 into the entrances and exits of the subway station under the field condition without the mechanical equipment hoisting condition is solved by transmitting and hoisting the stair slabs 10 of the prefabricated stairs, the operation is simple, the steps are clear, and the hoisting is safe.

The hoisting method provided by the invention can greatly reduce the difficulty of hoisting the stair treads 10 of the prefabricated stairs at the entrance and exit of the subway station, is convenient for the construction of workers, and improves the construction efficiency and the construction effect.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A method for lifting a stair tread of a prefabricated staircase at an entrance and an exit of a subway station is characterized in that the stair tread is provided with a first lifting point and a second lifting point, and the method for lifting the stair tread comprises the following steps:

step S4: and loosening and unloading the first hoisting hoist.

2. A method as claimed in claim 1, wherein before step S1, the method further comprises step S0: the step is transported to the doorway by a crane.

3. A conveying and hoisting method as claimed in claim 2, wherein the step S0 includes:

step S04: the sling is loosened and taken off.

4. A method as claimed in claim 1, wherein after the step S4, the method further comprises the step S5: repeating the steps S2 to S4 until the stair tread reaches above two adjacent stair posts arranged below the inclined top plate.

5. A method as claimed in claim 4, wherein after the step S5, the method further comprises the step S6: and loosening the second hoisting hoist and the third hoisting hoist to enable the stair boards to be erected between the two adjacent stair columns, and dismounting the second hoisting hoist and the third hoisting hoist.

6. A method as claimed in claim 5, wherein step S6 includes adjusting the relative position between the tread and the two landing pillars.