Prefabricated beam erecting method and equipment

Abstract

The invention provides a precast beam erecting method and equipment, and relates to the technical field of hoisting. The method specifically comprises the following steps that under the condition that the precast beam starts to be hoisted, a traction device drags the precast beam to move in the traction direction, and a first crane is cooperatively hoisted to the end, located on a first trestle, of the precast beam so as to balance the precast beam. And under the condition that the precast beam is hoisted between the first trestle and the second trestle, the traction device continues to drag the precast beam to move in the traction direction, and the third crane is cooperatively hoisted in the middle of the precast beam so as to balance the precast beam. And under the condition that the two ends of the precast beam correspond to the two supports correspondingly, the first crane and the second crane are hoisted to the two ends of the precast beam correspondingly, and the first crane and the second crane synchronously lower the precast beam till the two ends of the precast beam are placed on the two supports correspondingly. On the basis, the construction safety risk can be greatly reduced, and it is ensured that the precast beam can be safely and reliably hoisted.

Description

Technical Field

[0001] The present invention relates to the field of hoisting technology, and in particular to a method and equipment for erecting a prefabricated beam. Background Art

[0002] In traditional prefabricated beam construction, dual machines are usually used to lift prefabricated beams. That is, through the collaborative operation of two cranes, the prefabricated steel bridge can be quickly lifted to the designated location.

[0003] However, when the precast beam is long, due to the limitation of crane arm span, using two cranes to lift it may cause the precast beam to shake or tilt during the lifting process. In addition, during the lifting process, the loads borne by the two cranes are inconsistent, which may easily lead to equipment loss of control or damage. Summary of the invention

[0004] The purpose of the present invention includes, for example, providing a method and equipment for erecting prefabricated beams, which can greatly reduce construction safety risks and ensure that prefabricated beams can be hoisted safely and reliably.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a method for erecting a prefabricated beam, comprising the following steps:

[0007] Step S11, constructing a first trestle and a second trestle relatively at preset positions of the prefabricated beams, and constructing two supports between the first trestle and the second trestle, and parking the barge between the two supports;

[0008] Step S12, placing a prefabricated beam and parking a first crane on the first trestle, parking a traction device and a second crane on the second trestle, parking a third crane on the barge, and defining a straight line direction close to the second trestle and away from the first trestle as a traction direction;

[0009] Step S13, when the precast beam is started to be hoisted, the traction device pulls the precast beam to move along the traction direction, and the first crane cooperates with the end of the precast beam located on the first trestle to balance the precast beam;

[0010] Step S14: when the precast beam is hoisted between the first trestle and the second trestle, the traction device continues to pull the precast beam to move along the traction direction, and the third crane is cooperatively hoisted in the middle of the precast beam to balance the precast beam;

[0011] Step S15, when the two ends of the precast beam correspond to the two supports respectively, the first crane and the second crane are hoisted at the two ends of the precast beam respectively, and the first crane and the second crane lower the precast beam synchronously until the two ends of the precast beam are placed on the two supports respectively.

[0012] In an optional implementation, in step S12, a sending device is further provided on the first trestle, and the prefabricated beams are placed in the sending device.

[0013] In an optional embodiment, the sending device includes a plurality of gantries arranged on the first trestle, and the plurality of gantries are arranged at intervals along the traction direction to limit the prefabricated beams.

[0014] In an optional embodiment, the sending device includes a plurality of pulley blocks arranged on the first trestle, and the plurality of pulley blocks are arranged at intervals along the traction direction and are rollingly connected to the prefabricated beams.

[0015] In an optional embodiment, in step S12, the prefabricated beams are assembled and formed in the sending device.

[0016] In an optional embodiment, a plurality of binding ropes, a plurality of Bailey bodies, a plurality of Bailey pins and a plurality of transverse connectors are placed in the sending device; in the length direction, two adjacent Bailey bodies are connected by a Bailey pin to form a Bailey sheet; in the width direction, two adjacent Bailey sheets are connected by a transverse connector to form a Bailey beam; two or three Bailey beams are bundled with binding ropes to form a prefabricated beam.

[0017] In an optional embodiment, the transmitting device is further provided with a plurality of longitudinal connecting members, and in the length direction, two adjacent Bailey sheets are connected by the longitudinal connecting members to form a Bailey beam.

[0018] In an optional embodiment, the prefabricated beam erection method further comprises:

[0019] Step S16: After placing both ends of the prefabricated beam on two supports respectively, the operator fixes the prefabricated beam and removes the binding rope after fixing.

[0020] In an optional embodiment, in step S15, the third crane is hoisted to the middle of the precast beam, and lowers the precast beam synchronously with the first crane and the second crane.

[0021] In a second aspect, the present invention provides a precast beam erection device, which erects precast beams according to the precast beam erection method of any of the aforementioned embodiments, and includes a first crane arranged on a first pier, a second crane and a traction device arranged on a second pier, and a third crane arranged on a barge, wherein the first crane, the second crane and the third crane are used for selectively lifting the precast beams, and the traction device is used for towing the precast beams to move along the traction direction.

[0022] The beneficial effects of the embodiments of the present invention include:

[0023] The present application provides a method and equipment for erecting prefabricated beams, which specifically include the following steps: when the prefabricated beam is started to be hoisted, the traction device pulls the prefabricated beam to move along the traction direction, and the first crane is cooperatively hoisted at one end of the prefabricated beam located on the first trestle to balance the prefabricated beam. When the prefabricated beam is hoisted between the first trestle and the second trestle, the traction device continues to pull the prefabricated beam to move along the traction direction, and the third crane is cooperatively hoisted in the middle of the prefabricated beam to balance the prefabricated beam. When the two ends of the prefabricated beam are respectively corresponding to the two supports, the first crane and the second crane are respectively hoisted at the two ends of the prefabricated beam, and the first crane and the second crane are synchronously lowered until the two ends of the prefabricated beam are respectively placed on the two supports. Based on this, the construction safety risk can be greatly reduced, ensuring that the prefabricated beam can be hoisted safely and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of a process flow of a prefabricated beam erection method provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the hoisting of prefabricated beams provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of a first trestle and a first crane provided in an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of a second trestle and a second crane provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a second trestle and a traction device provided in an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of a barge and a third crane provided in an embodiment of the present invention;

[0031] Figure 7 Another schematic diagram of hoisting the prefabricated beam provided in an embodiment of the present invention;

[0032] Figure 8 Another schematic diagram of hoisting the prefabricated beam provided in the embodiment of the present invention;

[0033] Fig. 9Another schematic diagram of hoisting the prefabricated beam provided in the embodiment of the present invention;

[0034] Fig.10 A schematic diagram of sending settings provided by an embodiment of the present invention;

[0035] Fig.11 Another schematic diagram of a sending setting provided by an embodiment of the present invention;

[0036] Fig.12 A schematic diagram of the connection between a Bailey body and a Bailey pin provided in an embodiment of the present invention;

[0037] Fig.13 A schematic diagram of a connection of a transverse connector provided in an embodiment of the present invention;

[0038] Fig.14 A schematic diagram of the connection of the binding rope provided in an embodiment of the present invention;

[0039] Fig.15 This is a schematic diagram of the connection of the longitudinal connector provided in an embodiment of the present invention.

[0040] Icons: 10-precast beam; 11-binding rope; 13-Bailey body; 15-Bailey pin; 17-transverse connector; 19-longitudinal connector; 21-first pier; 23-second pier; 30-support; 40-barge; 51-first crane; 53-second crane; 55-third crane; 60-traction device; 70-transmitting device; 71-gantry; 73-pulley block. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0046] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0047] As mentioned in the background art, when the length of the precast beam 10 is long, the crane arm span is limited, which may cause the precast beam 10 to shake or tilt during the hoisting process. In addition, during the hoisting process, the loads borne by the cranes at both ends of the precast beam 10 are inconsistent, which may easily cause the equipment to lose control or be damaged.

[0048] In order to improve the above problems, the present application provides a method for erecting a prefabricated beam 10, which can greatly reduce the construction safety risk and ensure that the prefabricated beam 10 can be safely and reliably hoisted. Figure 1 The method for erecting a prefabricated beam 10 provided by the present invention specifically comprises the following steps:

[0049] Step S11 , constructing a first pier 21 and a second pier 23 at preset positions of the prefabricated beam 10 , and constructing two supports 30 between the first pier 21 and the second pier 23 , and parking the barge 40 between the two supports 30 .

[0050] In the above steps, since both ends of the precast beam 10 need to be placed on two supports 30 to complete the installation, the distance between the two supports 30 is determined by the size of the precast beam 10. In the embodiment of the present application, the specific length of the precast beam 10 is 49m, and the distance between the two supports 30 can be set to 45m accordingly, forming a navigation hole with a clear span of 45 meters, meeting the single-hole one-way navigation requirements.

[0051] It should also be noted that the specific positional relationship between the first trestle 21, the second trestle 23, and the support 30 is as follows: Figure 2As shown. The first trestle 21 and the second trestle 23 can be formed by connecting a plurality of 321110 Bailey sheets, 20-inch steel and 10mm steel plates, and a plurality of 321110 Bailey sheets are connected to one side of the 20-inch steel at intervals along the length direction of the 20-inch steel, and the 10mm steel plate is relatively arranged on the other side of the 20-inch steel. In addition, the support 30 can be set as a steel pipe pile with a size of φ820*10.

[0052] Step S12, placing the precast beam 10 and parking the first crane 51 on the first pier 21, parking the traction device 60 and the second crane 53 on the second pier 23, parking the third crane 55 on the barge 40, and defining the straight line direction close to the second pier 23 and away from the first pier 21 as the traction direction.

[0053] See also Figures 3 to 6 , wherein the first crane 51 and the second crane 53 can both be set as 75T crawler cranes, and can both hoist the precast beam 10 through a steel wire rope with a specification of 6x19φ20mm. The third crane 55 can be set as a 30T truck crane, and can hoist the precast beam 10 through a steel wire rope with a specification of 6x19φ20mm. The traction device 60 can be specifically set as a 10T winch, which can use a steel wire rope with a specification of 6×37φ16mm to pull the precast beam 10.

[0054] Step S13 , when the precast beam 10 starts to be hoisted, the traction device 60 pulls the precast beam 10 to move along the traction direction, and the first crane 51 cooperates to hoist the precast beam 10 at one end of the first trestle 21 to balance the precast beam 10 .

[0055] like Figure 2 As shown, the hoisting stage is the hoisting start stage, at this time, most of the precast beams 10 are located on the first trestle 21, and the traction device 60 is connected to one end of the precast beam 10 through a steel wire rope, thereby pulling the precast beam 10 to move along the traction direction accordingly. In addition, the first crane 51 is connected to the other end of the precast beam 10, that is, connected to the end of the precast beam 10 located on the first trestle 21, so as to prevent the precast beam 10 from folding downward under the action of gravity, thereby ensuring the hoisting safety at this stage.

[0056] Step S14, when the precast beam 10 is hoisted between the first trestle 21 and the second trestle 23, the traction device 60 continues to pull the precast beam 10 to move along the traction direction, and the third crane 55 is cooperatively hoisted in the middle of the precast beam 10 to balance the precast beam 10.

[0057] like Figure 7As shown, the hoisting stage is the hoisting operation stage, at this time, most of the precast beam 10 is located between the first trestle 21 and the second trestle 23, and the traction device 60 is still connected to one end of the precast beam 10 through the wire rope, and accordingly pulls the precast beam 10 to move along the traction direction. In order to take into account the arm span of the crane and the balance of the precast beam 10, the third crane 55 is used to cooperate with the hoisting in the middle of the precast beam 10 to improve the hoisting safety.

[0058] Step S15, when the two ends of the prefabricated beam 10 correspond to the two supports 30 respectively, the first crane 51 and the second crane 53 are hoisted at the two ends of the prefabricated beam 10 respectively, and the first crane 51 and the second crane 53 lower the prefabricated beam 10 synchronously until the two ends of the prefabricated beam 10 are placed on the two supports 30 respectively.

[0059] like Figure 8 and Fig. 9 As shown, the above hoisting stage is the final hoisting stage. At this time, the precast beam 10 is completely located between the first trestle 21 and the second trestle 23, and its two ends correspond to the two supports 30 respectively, and are respectively located within the arm span range of the first crane 51 and the second crane 53.

[0060] On the basis of the above, the first crane 51 and the second crane 53 are respectively connected to the two ends of the precast beam 10 to ensure the horizontal and vertical balance of the precast beam 10 and prevent the precast beam 10 from tilting or flipping during the hoisting process. Since the first crane 51 and the second crane 53 are lowered synchronously, the shaking of the precast beam 10 in the air can be further reduced, the stability of the hoisting process can be improved, and the load can be evenly distributed on the first crane 51 and the second crane 53 to avoid the risk of structural damage caused by uneven load.

[0061] As an optional embodiment, in step S15, the third crane 55 is hoisted in the middle of the precast beam 10, and lowers the precast beam 10 synchronously with the first crane 51 and the second crane 53. Based on the third crane 55, an additional hoisting point can be provided at the end of the hoisting, so as to disperse the load and reduce the burden of the remaining cranes. In addition, the first crane 51, the second crane 53 and the third crane 55 work synchronously, which can speed up the hoisting speed and improve the working efficiency.

[0062] See also Fig.10 and Fig.11 , Fig.10 A schematic diagram of sending settings provided by an embodiment of the present invention, Fig.11 Another schematic diagram of the sending device provided by the embodiment of the present invention is shown. To facilitate the movement of the precast beam 10 along the traction direction, in step S12 , a sending device 70 is further provided on the first trestle 21 , and the precast beam 10 is placed in the sending device 70 .

[0063] Furthermore, in order to ensure the linearity of the prefabricated beam 10, the sending device 70 includes a plurality of gantries 71 arranged on the first trestle 21, and the plurality of gantries 71 are arranged at intervals along the traction direction to limit the prefabricated beam 10. Among them, the gantries 71 are formed by welding with 75mm×75mm×6mm angle steel. In order to adapt to the size of the preset beam, the width dimension of the preset beam is specifically 2m, the height dimension is specifically 2.5m, and the diagonal brace is specifically 3.55m. In addition, the plurality of the above-mentioned gantries 71 are welded on the first trestle 21 at equal intervals of 10m, and the welding quality meets the requirements of relevant specifications.

[0064] Furthermore, to ensure the smoothness of traction, the sending device 70 includes a plurality of pulley blocks 73 arranged on the first trestle 21, and the plurality of pulley blocks 73 are arranged at intervals along the traction direction and are rollingly connected with the prefabricated beam 10. Among them, the pulley blocks 73 are 10T rolling pulley blocks 73, specifically 5 pulley blocks 73, which are arranged on the first trestle 21 at equal intervals of 18m.

[0065] As an optional embodiment, in order to improve the erection efficiency, in step S12, the prefabricated beam 10 is assembled in the sending device 70. It can be understood that on-site assembly can reduce the adjustment work required after the prefabricated beam 10 is placed in the sending device 70, and can reduce the collision and assembly between the two during transportation, thereby ensuring the structural strength of the prefabricated beam 10 accordingly.

[0066] Specifically, see Figure 12 to Figure 14 In the sending device 70, a plurality of tying ropes 11, a plurality of Bailey bodies 13, a plurality of Bailey pins 15 and a plurality of transverse connectors 17 are placed; in the length direction, two adjacent Bailey bodies 13 are connected by the Bailey pins 15 to form a Bailey sheet; in the width direction, two adjacent Bailey sheets are connected by the transverse connector 17 to form a Bailey beam; two or three Bailey beams are bundled by tying ropes 11 to form a prefabricated beam 10.

[0067] It should be noted that the binding rope 11 is a steel wire rope with a specification of 6x19φ20mm. There are 16 groups of prefabricated beams 10, with a total weight of 10 tons and a length of 49 meters. Considering the load of the crane and the traction device 60, the staff hoisted the prefabricated beams 10 in sequence according to the erection method of the prefabricated beams 10 provided in this application. For further information, please refer to Fig.15 The sending device 70 is also provided with a plurality of longitudinal connectors 19. In the length direction, two adjacent Bailey sheets are connected by the longitudinal connectors 19 to form a Bailey beam, thereby correspondingly improving the longitudinal connection strength. In addition, in the actual application scenario, a counterweight is also provided at one end of the precast beam 10 away from the second trestle 23. The length of the counterweight is specifically 49 meters, so as to prevent the precast beam 10 from tilting or flipping at the end connected to the traction device 60 during the hoisting process.

[0068] On the basis of the above, the present invention also includes a method for erecting a prefabricated beam 10 provided by the present invention, further including step S16, when the two ends of the prefabricated beam 10 are respectively placed on two supports 30, the operator fixes the prefabricated beam 10, and after the fixation is completed, removes the binding rope 11. Based on this, it is convenient to fix the prefabricated beam 10 with the subsequent prefabricated beam 10, so as to assemble a single-layer reinforced high shear truss on the bracket as the longitudinal beam of the navigation hole.

[0069] In summary, the present application provides a method for erecting a prefabricated beam 10, which specifically includes the following steps: when the prefabricated beam 10 is initially hoisted, the traction device 60 pulls the prefabricated beam 10 to move along the traction direction, and the first crane 51 is cooperatively hoisted at one end of the prefabricated beam 10 located at the first trestle 21 to balance the prefabricated beam 10. When the prefabricated beam 10 is hoisted between the first trestle 21 and the second trestle 23, the traction device 60 continues to pull the prefabricated beam 10 to move along the traction direction, and the third crane 55 is cooperatively hoisted at the middle of the prefabricated beam 10 to balance the prefabricated beam 10. When the two ends of the prefabricated beam 10 correspond to the two supports 30 respectively, the first crane 51 and the second crane 53 are respectively hoisted at the two ends of the prefabricated beam 10, and the first crane 51 and the second crane 53 are synchronously lowered to lower the prefabricated beam 10 until the two ends of the prefabricated beam 10 are respectively placed on the two supports 30. Based on this, the construction safety risk can be greatly reduced, ensuring that the prefabricated beam 10 can be hoisted safely and reliably.

[0070] In addition, the present application also provides a precast beam 10 erection device, which erects the precast beam 10 according to the precast beam 10 erection method of any of the above-mentioned embodiments, and includes a first crane 51 arranged on the first trestle 21, a second crane 53 and a traction device 60 arranged on the second trestle 23, and a third crane 55 arranged on the barge 40, wherein the first crane 51, the second crane 53 and the third crane 55 are used to selectively hoist the precast beam 10, and the traction device 60 is used to traction the precast beam 10 to move along the traction direction. Therefore, the above-mentioned equipment can also greatly reduce the construction safety risk and ensure that the precast beam 10 can be safely and reliably hoisted.

[0071] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for erecting prefabricated beams, characterized in that: The following steps are involved: Step S11, constructing a first trestle and a second trestle relatively at a preset position of the prefabricated beam, and constructing two supports between the first trestle and the second trestle, and parking the barge between the two supports; Step S12, placing a prefabricated beam and parking a first crane on the first trestle, parking a traction device and a second crane on the second trestle, parking a third crane on the barge, and defining a straight line direction close to the second trestle and away from the first trestle as a traction direction; Step S13, when the precast beam starts to be hoisted, the traction device pulls the precast beam to move along the traction direction, and the first crane cooperates with the end of the precast beam located on the first trestle to balance the precast beam; Step S14: when the precast beam is hoisted between the first trestle and the second trestle, the traction device continues to pull the precast beam to move along the traction direction, and the third crane is cooperatively hoisted in the middle of the precast beam to balance the precast beam; Step S15, when the two ends of the prefabricated beam correspond to the two supports respectively, the first crane and the second crane are hoisted at the two ends of the prefabricated beam respectively, and the first crane and the second crane simultaneously lower the prefabricated beam until the two ends of the prefabricated beam are respectively placed on the two supports.

2. The method for erecting prefabricated beams according to claim 1, characterized in that: In step S12, a sending device is further provided on the first trestle, and the prefabricated beam is placed in the sending device.

3. The method for erecting prefabricated beams according to claim 2, characterized in that: The sending device includes a plurality of gantries arranged on the first trestle, and the plurality of gantries are arranged at intervals along the traction direction to limit the prefabricated beams.

4. The method for erecting prefabricated beams according to claim 2, characterized in that: The sending device includes a plurality of pulley blocks arranged on the first trestle, and the plurality of pulley blocks are arranged at intervals along the traction direction and are rollingly connected with the prefabricated beams.

5. The method for erecting prefabricated beams according to claim 2, characterized in that: In step S12, the prefabricated beams are assembled and formed in the sending device.

6. The method for erecting prefabricated beams according to claim 5, characterized in that: A plurality of binding ropes, a plurality of Bailey bodies, a plurality of Bailey pins and a plurality of transverse connectors are placed in the sending device; in the length direction, two adjacent Bailey bodies are connected by the Bailey pins to form a Bailey sheet; in the width direction, two adjacent Bailey sheets are connected by the transverse connector to form a Bailey beam; two or three Bailey beams are bundled together by binding ropes to form the prefabricated beam.

7. The method for erecting prefabricated beams according to claim 6, characterized in that: The transmitting device is also provided with a plurality of longitudinal connecting members, and in the length direction, two adjacent Bailey sheets are connected by the longitudinal connecting members to form a Bailey beam.

8. The method for erecting prefabricated beams according to claim 6 or 7, characterized in that: The prefabricated beam erection method further comprises: Step S16: After placing both ends of the prefabricated beam on the two supports respectively, the operator fixes the prefabricated beam and removes the binding rope after fixing.

9. The method for erecting prefabricated beams according to claim 1, characterized in that: In step S15, the third crane is hoisted to the middle of the precast beam, and lowers the precast beam synchronously with the first crane and the second crane.

10. A prefabricated beam erection device, characterized in that: The precast beam erection equipment erects the precast beam according to the precast beam erection method according to any one of claims 1 to 9, and comprises a first crane arranged on the first pier, a second crane and a traction device arranged on the second pier, and a third crane arranged on the barge, wherein the first crane, the second crane and the third crane are used for selectively lifting the precast beam, and the traction device is used for traction of the precast beam to move along the traction direction.

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