Hoisting construction method for top steel structures of towering large-span silos in rows

Abstract

The invention discloses a hoisting construction method for top steel structures of towering large-span silos in rows, which comprises the following steps: S1, numbering the towering large-span silos in sequence, namely the silos 1 # to n # in sequence, and setting the hoisting sequence numbers of to-be-mounted steel structures on the silos 1 # to n # in sequence as QC1 to QCn; s2, the silo top steel structure is placed and assembled at the designated position of a hoisting construction site and is installed and welded; s3, the 200-ton truck-mounted crane enters the yard to be assembled, a counterweight is hung, and the truck-mounted crane enters the yard from one side of the west side and stands for hoisting construction; s4, the truck crane enters the site from the east side of the other side and stands for hoisting construction; according to the invention, the continuity of the hoisting process of the row of towering silo top steel structures is realized, the time of idling of workers and displacement of a crane caused by an improper hoisting sequence is reduced, the construction efficiency is improved, the construction period can be reasonably shortened, and the construction continuity is ensured.

Description

Technical Field

[0001] This invention relates to the technical field of steel structure construction methods, and in particular to a hoisting construction method for a row of tall, large-span steel structures on the roof of silos. Background Technology

[0002] Currently, the installation of steel structures for warehouse roofs (such as steel structures for warehouse vertical silos) mainly adopts methods such as high-altitude assembly, step-by-step hoisting, and slipform towing. Among them, the high-altitude assembly method uses a crane to lift the steel structure to the warehouse roof and fix it in stages; this method has the advantages of small crane footprint and low rental cost. The step-by-step hoisting method first assembles the secondary beams on the ground and then uses a crane to lift the entire steel structure to the warehouse roof position; however, this method requires a large crane footprint, limited space, and high rental cost. The slipform towing method uses slipform jacks to lift the entire steel structure into place; this method also requires a large crane footprint, limited space, and high rental cost.

[0003] However, in actual construction, especially for the steel structure construction of rows of tall, large-span silos, the above methods are inefficient and the work process is relatively complicated due to the large number of silos and the need to install steel structural components on each silo. This will affect the overall construction progress. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned situation by providing a hoisting construction method for the steel structure of rows of tall, large-span silo roofs. This hoisting construction method not only improves construction efficiency but also reasonably shortens the construction period.

[0005] The specific solution of this invention is: a method for hoisting and constructing a row of tall, large-span steel structures for the roof of silos, comprising the following steps:

[0006] S1. Number each tall, large-span silo in sequence, from silo #1 to silo #n. For silo #1 to silo #n, set the hoisting sequence number of the steel structure to be installed on it to QC1 to QCn.

[0007] S2. Place and assemble the steel structure of the silo roof at the designated location on the hoisting construction site and weld it together;

[0008] S3. A 200-ton truck crane was brought in and equipped with a counterweight. The crane entered from the west side and positioned itself between QC1 and QC2, proceeding in the following order: lifting the two main beams in the middle of QC1 → lifting the west side subsidence area of ​​QC1 → lifting the west side chute of QC1 → lifting the side beams of QC1 → lifting the two main beams in the middle of QC2 → lifting the west side subsidence area of ​​QC2 → lifting the west side chute of QC2 → lifting the side beams of QC2 → retracting the crane's footrests and moving the crane. Then, the crane's position was moved from between QC1 and QC2 to between QC3 and QC4: lifting the two main beams in the middle of QC3... Beam → Hoisting QC3 West Side Crusher → Hoisting QC3 West Side Chute → Hoisting QC3 Side Beam → Hoisting QC4 Middle Side Beam → Hoisting QC4 West Side Crusher → Hoisting QC4 West Side Chute → Hoisting QC4 Side Beam → Crane retracts its feet and moves forward; Repeat the above steps until the crane reaches QCn; If n is even, the crane will hoist the steel structure of the silo top on two adjacent tall, large-span silos with each forward movement; If n is odd, the crane will only hoist the steel structure of the silo top on the tall, large-span silo at QCn for the last movement.

[0009] S4. The truck crane then enters the site from the other east side and positions itself between QC1 and QC2, proceeding in the following order: hoisting the two main beams in the middle of QC1 → hoisting the east side chute of QC1 → hoisting the side beams of QC1 → hoisting the two main beams in the middle of QC2 → hoisting the east side chute of QC2 → hoisting the side beams of QC2 → retracting the crane's foot and moving it out; then the crane position is moved from between QC1 and QC2 to between QC3 and QC4: hoisting the two main beams in the middle of QC3 → hoisting the east side chute of QC3 → hoisting the side beams of QC3. Side-lowering crusher → hoisting the east chute of QC3 → hoisting the side beam of QC3 → hoisting the middle two side beams of QC4 → hoisting the east-lowering crusher of QC4 → hoisting the east chute of QC4 → hoisting the side beam of QC4 → crane retracts its feet and moves forward; repeat the above steps until the crane hoists to QCn; if n is even, the crane will hoist the silo top steel structure of two adjacent tall, large-span silos in each forward movement; if n is odd, the crane will only hoist the silo top steel structure of the tall, large-span silo at QCn in its last movement.

[0010] Furthermore, in this invention, before hoisting, the elevation of the embedded parts on the top of silos #1 to #n is re-measured or re-calibrated; the hoisting points of the main beams on each silo must ensure the planar rigidity of the main beams. When hoisting the main beams, first hoist the main beams 30cm off the ground, align the center of the main beams with the center of the installation position, and then lift the hook to reduce the movement of the crane and the lifting boom after the main beams are hoisted into the air; after the first main beam is installed in place, there is no need to set two guy ropes on each side for temporary fixation and correction. After the second main beam is hoisted in place, do not loosen the hook, use ropes to temporarily fix it to the first main beam, and then install the secondary beams to form a rigid system of spatial structure. Finally, correct and fix the whole. Starting from the third main beam, install the secondary beams on the main beams to fix the main beams, and at the same time, correct the main beams; the main beam correction is checked with a plumb bob, and the bending of the main beams is checked with a taut measuring line. After the main beam is aligned, tighten the bolts at both ends of the temporary fixing support and the bolts at the resting points of the main beam, and weld the connecting parts.

[0011] Furthermore, in this invention, after the first main beam is installed in place, embedded parts are set on both sides of it. The center line of the support of the main beam is aligned with the standard center line on the embedded part. If the center line on the embedded part deviates too much from the standard center line, it is gradually adjusted to avoid affecting the installation of the secondary beam.

[0012] Furthermore, in this invention, when the main beam is finally fixed by electric welding, two welders are used to weld simultaneously on different sides of both ends of the main beam to avoid welding on the same side at the same time; after the first main beam is installed in place, embedded parts are set on both sides of it. When the main beam is connected to the embedded parts, the tightness of the contact between the main beam connecting plate and the embedded parts should be ensured; the bottom plate at the end of the main beam and the embedded parts must be in tight contact.

[0013] The present invention has the following beneficial effects:

[0014] 1. By rationally arranging the crane positions of the truck crane, the lifting process is optimized: Each crane position is located between two silos, and one placement can cover the lifting process of both silos at the same time. This reduces the number of placements required from one side to half, which is sufficient to meet the lifting requirements. At the same time, the lifting process is optimized by improving the lifting sequence. Based on the special characteristics of the silo steel structure, the lifting is carried out according to the placement of the steel structure, the lifting height, and the lifting weight, following the principle of "west first, then east; inside first, then outside; lower the crushed chute first, then the silo top beam".

[0015] 2. The method of this invention is applicable to the hoisting construction of steel structures for the roofs of large-diameter, long-span, tall silos. It adopts the principle of "west first, then east; inside first, then outside; lower the chute first, then the silo roof beam" for hoisting the steel structure of the silo roof, solving the problems of traditional large-diameter silo roof steel structure hoisting due to the large silo radius, limited hoisting equipment, and long construction period. Through scheme comparison, foundation verification, hoisting calculation, and selection of hoisting sequence, the method utilizes the special characteristics of silo steel structures, optimizes crane positioning, and improves the hoisting sequence, achieving continuity in the hoisting process of rows of tall silo roof steel structures. This reduces personnel downtime and crane relocation time caused by improper hoisting sequence, improving construction efficiency, reasonably shortening the construction period, and ensuring construction continuity. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of the first state in an embodiment of the present invention;

[0017] Fig. 2 This is a schematic diagram of the second state in an embodiment of the present invention;

[0018] Fig. 3 This is a schematic diagram of the third state in an embodiment of the present invention;

[0019] Fig. 4 This is a schematic diagram of the three states integrated into one in an embodiment of the present invention.

[0020] In the diagram: 1—Tall, large-span silo; 2—Mobile crane. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] This invention relates to a method for hoisting and constructing a row of tall, large-span steel structures for the roofs of silos, comprising the following steps:

[0024] S1. Number each tall, large-span silo in sequence, from silo #1 to silo #n. For silo #1 to silo #n, set the hoisting sequence number of the steel structure to be installed on it to QC1 to QCn.

[0025] S2. Place and assemble the steel structure of the silo roof at the designated location on the hoisting construction site and weld it together;

[0026] S3. A 200-ton truck crane was brought in and equipped with a counterweight. The crane entered from the west side and positioned itself between QC1 and QC2, proceeding in the following order: lifting the two main beams in the middle of QC1 → lifting the west side subsidence area of ​​QC1 → lifting the west side chute of QC1 → lifting the side beams of QC1 → lifting the two main beams in the middle of QC2 → lifting the west side subsidence area of ​​QC2 → lifting the west side chute of QC2 → lifting the side beams of QC2 → retracting the crane's footrests and moving the crane. Then, the crane's position was moved from between QC1 and QC2 to between QC3 and QC4: lifting the two main beams in the middle of QC3... Beam → Hoisting QC3 West Side Crusher → Hoisting QC3 West Side Chute → Hoisting QC3 Side Beam → Hoisting QC4 Middle Side Beam → Hoisting QC4 West Side Crusher → Hoisting QC4 West Side Chute → Hoisting QC4 Side Beam → Crane retracts its feet and moves forward; Repeat the above steps until the crane reaches QCn; If n is even, the crane will hoist the steel structure of the silo top on two adjacent tall, large-span silos with each forward movement; If n is odd, the crane will only hoist the steel structure of the silo top on the tall, large-span silo at QCn for the last movement.

[0027] S4. The truck crane then enters the site from the other east side and positions itself between QC1 and QC2, proceeding in the following order: hoisting the two main beams in the middle of QC1 → hoisting the east side chute of QC1 → hoisting the side beams of QC1 → hoisting the two main beams in the middle of QC2 → hoisting the east side chute of QC2 → hoisting the side beams of QC2 → retracting the crane's foot and moving it out; then the crane position is moved from between QC1 and QC2 to between QC3 and QC4: hoisting the two main beams in the middle of QC3 → hoisting the east side chute of QC3 → hoisting the side beams of QC3. Side-lowering crusher → hoisting the east chute of QC3 → hoisting the side beam of QC3 → hoisting the middle two side beams of QC4 → hoisting the east-lowering crusher of QC4 → hoisting the east chute of QC4 → hoisting the side beam of QC4 → crane retracts its feet and moves forward; repeat the above steps until the crane hoists to QCn; if n is even, the crane will hoist the silo top steel structure of two adjacent tall, large-span silos in each forward movement; if n is odd, the crane will only hoist the silo top steel structure of the tall, large-span silo at QCn in its last movement.

[0028] Furthermore, in this invention, before hoisting, the elevation of the embedded parts on the top of silos #1 to #n is re-measured or re-calibrated; the hoisting points of the main beams on each silo must ensure the planar rigidity of the main beams. When hoisting the main beams, first hoist the main beams 30cm off the ground, align the center of the main beams with the center of the installation position, and then lift the hook to reduce the movement of the crane and the lifting boom after the main beams are hoisted into the air; after the first main beam is installed in place, there is no need to set two guy ropes on each side for temporary fixation and correction. After the second main beam is hoisted in place, do not loosen the hook, use ropes to temporarily fix it to the first main beam, and then install the secondary beams to form a rigid system of spatial structure. Finally, correct and fix the whole. Starting from the third main beam, install the secondary beams on the main beams to fix the main beams, and at the same time, correct the main beams; the main beam correction is checked with a plumb bob, and the bending of the main beams is checked with a taut measuring line. After the main beam is aligned, tighten the bolts at both ends of the temporary fixing support and the bolts at the supports at both ends of the main beam, and weld the connecting parts. Furthermore, in this invention, after the first main beam is installed, embedded parts are installed on both sides. The centerline of the main beam support is aligned with the standard centerline on the embedded part. If the centerline on the embedded part deviates too much from the standard centerline, it is gradually adjusted to avoid affecting the installation of the secondary beams. Furthermore, in this invention, when the main beam is finally fixed by electric welding, two welders simultaneously weld on different sides of both ends of the main beam to avoid welding on the same side at the same time. After the first main beam is installed, embedded parts are installed on both sides. When the main beam is connected to the embedded parts, the tightness of the contact between the main beam connecting plate and the embedded parts must be ensured. The bottom plate at the end of the main beam must also ensure tight contact with the embedded parts.

[0029] By rationally arranging the crane positions of the truck cranes, the lifting process is optimized: each crane position is located between two silos, and one placement can cover the lifting process of both silos simultaneously. This reduces the number of placements required from one side to half, which was originally required on one side. Furthermore, the lifting process is optimized by taking into account the special characteristics of the silo steel structure. Based on the placement of the steel structure, the lifting height, and the lifting weight, the principle of "west first, then east; inside first, then outside; lower the chute first, then the silo top beam" is followed during construction.

[0030] This invention provides a method applicable to the hoisting and construction of steel structures for the roofs of large-diameter, long-span, and towering silos. It employs the principle of "west first, then east; inside first, then outside; lower the chute first, then the silo roof beam" for the hoisting of the steel structure, solving problems associated with traditional large-diameter silo roof steel structure hoisting due to the large silo radius, limited hoisting equipment, and long construction periods. Through scheme comparison, foundation verification, hoisting calculations, and selection of the hoisting sequence, the invention leverages the unique characteristics of silo steel structures, optimizing crane positioning and improving the hoisting sequence. This achieves continuity in the hoisting process of rows of towering silo roof steel structures, reducing personnel downtime and crane relocation time caused by improper hoisting sequences. This improves construction efficiency, reasonably shortens the construction period, and ensures construction continuity.

[0031] The following is in conjunction with the appendix Figs. 1-4 The specific embodiments of the present invention will be described in detail below.

[0032] Taking a row of six tall, large-span silos as an example, numbered 1#-6#, the placement of the steel structure on the silo roofs took into account crane positioning, travel, and the clearing of counterweights, as well as the overlapping work of on-site steel structure assembly and other processes. The final hoisting sequence for the silo roof steel structures was determined to be QC1-QC6. The steel structures were placed and welded according to the designated positions, and a Sany SYM5551JQZ200C truck crane was used in conjunction with the hoisting process.

[0033] Based on the steel structure placement, hoisting height, and hoisting weight, the hoisting process followed the principle of "west first, then east; inside first, then outside; lower the chute first, then the silo top beam." The entire hoisting process involved one entry and one exit of the 200-ton truck crane. During the hoisting process, the crane was positioned between adjacent silos (e.g.,...). Figs. 1-4 ).

[0034] The specific hoisting sequence is as follows (e.g.) Figs. 1-3 ):

[0035] Arrival of the crane (with counterweight) → Lifting of the middle two side beams of QC1 → Lifting of the west side crusher of QC1 → Lifting of the west side chute of QC1 → Lifting of the side beams of QC1 → Lifting of the middle two side beams of QC2 → Lifting of the west side crusher of QC2 → Lifting of the west side chute of QC2 → Lifting of the side beams of QC2 → Crane retraction and movement (positioning from between QC1 and QC2 to between QC3 and QC4) → Lifting of the middle beam of QC3 → Lifting of the west side crusher of QC3 → Lifting of the west side chute of QC3 → Lifting of the QC2 side beam C3 side beam → hoisting QC4 middle beam → hoisting QC4 west side crusher → hoisting QC4 west side chute → hoisting QC4 side beam → crane retracts and moves (station position moves from between QC3-QC4 to between QC5-QC6) → hoisting QC5 middle beam → hoisting QC5 west side crusher → hoisting QC5 west side chute → hoisting QC5 side beam → hoisting QC6 middle beam → hoisting QC6 west side crusher → hoisting QC6 west side chute → hoisting QC6 side beam.

[0036] The hoisting sequence and crane positioning for the steel structure on the top of the silo on the east side are similar to those on the west side, proceeding in sequence.

[0037] The hoisting operation implemented using the above method involves the crane station located between adjacent silos, with one placement simultaneously covering the hoisting process of two silos. This reduces the original requirement of 6 placements per side to only 3 placements to meet the hoisting requirements. Furthermore, the hoisting process has been optimized by altering the hoisting sequence. Based on the special characteristics of the silo steel structure, the hoisting is carried out according to the placement of the steel structure, hoisting height, and hoisting weight, following the principle of "west first, then east; inside first, then outside; lower the chute first, then the silo top beam."

Claims

1. A method for hoisting and constructing a row of tall, large-span steel structures for the roofs of silos, characterized in that, Includes the following steps: S1. Number each tall, large-span silo in sequence, from silo #1 to silo #n. For silo #1 to silo #n, set the hoisting sequence number of the steel structure to be installed on it to QC1 to QCn. S2. Place and assemble the steel structure of the silo roof at the designated location on the hoisting construction site and weld it together; S3. A 200-ton truck crane was brought in and equipped with a counterweight. The crane entered from the west side and positioned itself between QC1 and QC2, proceeding in the following order: lifting the two main beams in the middle of QC1 → lifting the west side subsidence area of ​​QC1 → lifting the west side chute of QC1 → lifting the side beams of QC1 → lifting the two main beams in the middle of QC2 → lifting the west side subsidence area of ​​QC2 → lifting the west side chute of QC2 → lifting the side beams of QC2 → retracting the crane's footrests and moving the crane. Then, the crane's position was moved from between QC1 and QC2 to between QC3 and QC4: lifting the two main beams in the middle of QC3... Beam → Hoisting QC3 West Side Crusher → Hoisting QC3 West Side Chute → Hoisting QC3 Side Beam → Hoisting QC4 Middle Side Beam → Hoisting QC4 West Side Crusher → Hoisting QC4 West Side Chute → Hoisting QC4 Side Beam → Crane retracts its feet and moves forward; Repeat the above steps until the crane reaches QCn; If n is even, the crane will hoist the steel structure of the silo top on two adjacent tall, large-span silos with each forward movement; If n is odd, the crane will only hoist the steel structure of the silo top on the tall, large-span silo at QCn for the last movement. S4. The truck crane then enters the site from the other east side and positions itself between QC1 and QC2, proceeding in the following order: hoisting the two main beams in the middle of QC1 → hoisting the east side chute of QC1 → hoisting the side beams of QC1 → hoisting the two main beams in the middle of QC2 → hoisting the east side chute of QC2 → hoisting the side beams of QC2 → retracting the crane's foot and moving it out; then the crane position is moved from between QC1 and QC2 to between QC3 and QC4: hoisting the two main beams in the middle of QC3 → hoisting the east side chute of QC3 → hoisting the side beams of QC3. Side-lowering crusher → hoisting the east chute of QC3 → hoisting the side beam of QC3 → hoisting the middle two side beams of QC4 → hoisting the east-lowering crusher of QC4 → hoisting the east chute of QC4 → hoisting the side beam of QC4 → crane retracts its feet and moves forward; repeat the above steps until the crane hoists to QCn; if n is even, the crane will hoist the silo top steel structure of two adjacent tall, large-span silos in each forward movement; if n is odd, the crane will only hoist the silo top steel structure of the tall, large-span silo at QCn in its last movement.

2. The method for hoisting and constructing a row of tall, large-span silo roof steel structures according to claim 1, characterized in that, Before hoisting, the elevation of the embedded parts on the top of silos #1 to #n should be re-measured or re-calibrated. The hoisting points of the main beams on each silo must ensure the planar rigidity of the beams. When hoisting the main beams, first lift them 30cm off the ground, align the center of the beam with the center of the installation position, and then lift the hook to reduce the movement of the crane's boom and lifting arm after the beams are lifted into the air. After the first main beam is installed, there is no need to set two guy ropes on each side for temporary fixing and correction. Similarly, after the second main beam is hoisted, do not release the hook; use ropes to temporarily fix it to the first main beam before installing the secondary beams to form a rigid spatial structure system. Finally, correct and fix the entire structure. Starting from the third main beam, install the secondary beams on top of the main beams to fix them, and simultaneously correct the main beams. The main beam correction is checked using a plumb bob, and the bending of the main beams is checked using a taut measuring line. After the main beams are corrected, tighten the bolts at both ends of the temporary fixing supports and the bolts at the supports at both ends of the main beam, and weld the connecting parts.

3. The method for hoisting and constructing a row of tall, large-span silo roof steel structures according to claim 2, characterized in that, After the first main beam is installed in place, embedded parts are set on both sides. The center line of the main beam support is aligned with the standard center line on the embedded part. If the center line on the embedded part deviates too much from the standard center line, it is gradually adjusted to avoid affecting the installation of the secondary beam.

4. The method for hoisting and constructing a row of tall, large-span silo roof steel structures according to claim 2, characterized in that, When the main beam is finally fixed by electric welding, two welders should weld simultaneously on different sides of both ends of the main beam to avoid welding on the same side at the same time. After the first main beam is installed in place, embedded parts are set on both sides. When the main beam is connected to the embedded parts, the tightness of the contact between the main beam connecting plate and the embedded parts should be ensured. The bottom plate at the end of the main beam must be in tight contact with the embedded parts.

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