Middle-high-position connecting bridge hoisting method

Abstract

The invention discloses a middle and high position connecting bridge hoisting method. The method comprises the following steps that S1, low, middle and high position connecting bridge installation points are preset between buildings; s2, a connecting bridge assembling jig frame is installed between the building body connecting flat layers, and a connecting bridge is assembled on the connecting bridge assembling jig frame; s3, lifting mechanisms are arranged above the low-position connecting bridge installation point, the middle-position connecting bridge installation point and the high-position connecting bridge installation point; and S4, a lifting mechanism above the low-position connecting bridge installation point lifts the connecting bridge to the low-position connecting bridge installation point, and the connecting bridge is connected and fixed through temporary measures. According to the invention, a sectional type hoisting mode is adopted, the device can be used in the middle and high position connecting bridge hoisting process, long-mileage hoisting is divided into multi-section type hoisting, and after the device is lifted to a low position installation point, the device can be fixed through temporary measures, so that additional structural rod pieces can be conveniently subjected to supplementary welding at the position so as to adapt to a subsequent middle and high position installation point; or the lifting point is adjusted to solve the potential safety hazard in the subsequent lifting process.

Description

Technical Field

[0001] The invention relates to the technical field of bridge hoisting, and in particular to a method for hoisting a middle-high level bridge. Background Art

[0002] Floor bridges, also known as sky corridors or cross-layer bridges, refer to bridge structures used to connect different floors or buildings in buildings. In large buildings or complexes consisting of multiple buildings, floor bridges can effectively connect various parts, improve the efficiency of space utilization and the convenience of personnel passage. In commercial complexes, office buildings and other buildings, floor bridges can be used to connect different functional areas.

[0003] There are various construction methods for floor bridges in the prior art. However, in the construction method in which the entire bridge is prefabricated in a factory and then hoisted as a whole using equipment such as a crane, there are problems such as the heavy weight of the bridge, the high positioning height, and the high requirements for docking precision control. There is room for improvement, so a medium-high position bridge hoisting method is proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a method for hoisting a medium-high-position bridge in view of the above-mentioned shortcomings.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a method for hoisting a middle-high bridge, comprising the following steps:

[0006] S1. Preset low, middle and high bridge installation points between buildings;

[0007] S2, installing a connecting bridge assembly frame between the connecting floors of the building, and assembling the connecting bridge on the connecting bridge assembly frame;

[0008] S3, arranging a lifting mechanism above the lower, middle and upper bridge installation points;

[0009] S4, the lifting mechanism above the low-position connecting bridge installation point lifts the connecting bridge to the low-position connecting bridge installation point, and connects and fixes it through temporary measures;

[0010] S5, the lifting mechanism above the middle connecting bridge installation point lifts the connecting bridge at the low connecting bridge installation point to the middle connecting bridge installation point;

[0011] S6, the lifting mechanism above the high-position connecting bridge installation point lifts the connecting bridge at the middle-position connecting bridge installation point to the high-position connecting bridge installation point, and connects and fixes the connecting bridge through temporary measures;

[0012] S7. Measure and correct the position of the connecting bridge, install the remaining rods and weld them, and fix the connecting bridge to the corresponding connecting bridge installation point.

[0013] Furthermore, the method further comprises the following steps:

[0014] S8. The lifting mechanism hoists the cantilever beams and edge beams of the remaining trusses of the connecting bridge to the connecting bridge and completes the overall welding with the connecting bridge;

[0015] S9. After the construction of the cantilever structure inside the building is completed, the truss floor deck is laid and concrete is poured.

[0016] Furthermore, the bridge assembly step in step S2 further includes:

[0017] Setting a bridge truss, wherein the bridge truss does not include the outer cantilever beams and edge beams of the bridge facade truss;

[0018] The bridge truss is coated with fire retardant paint, and steel bars are laid and bolts are welded inside the bridge truss;

[0019] Temporary reinforcement rods are welded inside the connecting bridge trusses to form the connecting bridge.

[0020] Furthermore, the step of installing the remaining rods in step S6 includes:

[0021] The tower crane hoists the outer cantilever beams and edge beams of the bridge facade truss onto the bridge and welds them;

[0022] Lay the truss floor deck and pour concrete.

[0023] Furthermore, pre-installed sections are provided on the lower, middle and upper connecting bridge installation points, and the pre-installed sections are used to connect with the connecting bridge.

[0024] Furthermore, the step S4 also includes the following steps:

[0025] The lifting mechanism above the low-position connecting bridge installation point pre-lifts the connecting bridge before formal lifting, so as to drive the connecting bridge to separate from the connecting bridge assembly frame and leave it still for 12 hours, and monitor the deformation of the connecting bridge during the lifting process in real time.

[0026] Furthermore, step S4 and step S5 also include a monitoring step for monitoring the entire lifting process.

[0027] Furthermore, the monitoring step includes a computer system measurement step and a measurement tool measurement step.

[0028] Furthermore, the computer system measurement step includes:

[0029] a1. Set monitoring points on the lifting mechanism and the connecting bridge, and deploy sensors. The sensors at each point will feed back data to the computer for centralized processing. Through data feedback and control command transmission, various information during the connecting bridge lifting process is monitored;

[0030] a2. The operator remotely observes the hydraulic pushing process of the lifting mechanism and related data and issues control instructions through the computer control system;

[0031] a3. After lifting into place, the surveyors use measuring tools to measure the accurate displacement values ​​of each monitoring point.

[0032] Furthermore, the measuring tool measuring step includes:

[0033] b1. When the structure is just off the ground and before it is officially lifted, the initial position of each lifting point needs to be measured. Based on the measurement results, the height of each lifting rope of the lifting mechanism is adjusted to ensure that the structural posture meets the design requirements.

[0034] b2. During the formal lifting stage, as the lifting height increases, measurement is performed every 5 meters. After each measurement is completed, the height of each lifting point is adjusted according to the measurement result until all lifting points are at the same height.

[0035] b3. During the lifting and positioning phase, when the structure is lifted to the specified distance, each lifting point position needs to be measured. During this phase, the lifting frequency of the lifting mechanism needs to be lowered, and the measurement must be carried out in cooperation with the surveying personnel to ensure accurate alignment of the structural members.

[0036] The beneficial effects of the present invention are embodied in:

[0037] The present invention adopts a segmented lifting method, which can be used in the lifting process of medium and high-position continuous bridges, and divides the long-distance lifting into multi-stage lifting. After lifting to the low-position installation point, it can be fixed by temporary measures to facilitate the supplementary welding of additional structural rods at this position to adapt to the subsequent medium and high-position installation points, or adjust the lifting points to solve the safety hazards in the subsequent lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0039] 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 only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 The present invention discloses a method for hoisting a middle-high-position bridge, comprising the following steps:

[0041] S1. Preset low, middle and high bridge installation points between buildings;

[0042] S2, installing a connecting bridge assembly frame between the connecting floors of the building, and assembling the connecting bridge on the connecting bridge assembly frame;

[0043] S3, arranging a lifting mechanism above the lower, middle and upper bridge installation points;

[0044] S4, the lifting mechanism above the low-position connecting bridge installation point lifts the connecting bridge to the low-position connecting bridge installation point, and connects and fixes it through temporary measures;

[0045] S5, the lifting mechanism above the middle connecting bridge installation point lifts the connecting bridge at the low connecting bridge installation point to the middle connecting bridge installation point;

[0046] S6, the lifting mechanism above the high-position connecting bridge installation point lifts the connecting bridge at the middle-position connecting bridge installation point to the high-position connecting bridge installation point, and connects and fixes the connecting bridge through temporary measures;

[0047] S7. Measure and correct the position of the connecting bridge, install the remaining rods and weld them, and fix the connecting bridge to the corresponding connecting bridge installation point.

[0048] In this application, a segmented lifting method is adopted, which can be used in the lifting process of medium and high-position continuous bridges. The long-distance lifting is divided into multi-stage lifting. After lifting to the low-position installation point, it can be fixed through temporary measures to facilitate the supplementary welding of additional structural rods at this position to adapt to the subsequent medium and high-position installation points, or adjust the lifting points to solve the safety hazards in the subsequent lifting process.

[0049] It should be added that the following steps are also included:

[0050] S8. The lifting mechanism hoists the cantilever beams and edge beams of the remaining trusses of the connecting bridge to the connecting bridge and completes the overall welding with the connecting bridge;

[0051] S9. After the construction of the cantilever structure inside the building is completed, the truss floor deck is laid and concrete is poured.

[0052] After each connecting bridge arrives at the designated position and is temporarily fixed, the remaining truss outer cantilever beams and edge beams of the connecting bridge can be lifted to the connecting bridge through the lifting mechanism, and then the overall welding with the connecting bridge is completed to further improve the structural strength of the connecting bridge. After that, after the construction of the cantilever structure inside the building is completed, the truss floor deck is laid inside the connecting bridge, and the inner side of the building and the inside of the connecting bridge are cast as a whole.

[0053] Specifically, the bridge assembly step in step S2 further includes:

[0054] Setting a bridge truss, wherein the bridge truss does not include the outer cantilever beams and edge beams of the bridge facade truss;

[0055] The bridge truss is coated with fire retardant paint, and steel bars are laid and studs are welded inside the bridge truss;

[0056] Temporary reinforcement rods are welded inside the connecting bridge trusses to form the connecting bridge.

[0057] In the above steps, in order to avoid the overall weight of the connecting bridge being too heavy during the lifting process, only the connecting bridge truss is set for lifting. In order to avoid the deformation of the connecting bridge due to stress during the lifting process, reinforcing rods are welded in the connecting bridge truss to improve the overall strength of the connecting bridge, so as to cope with the deformation of the connecting bridge caused by uneven stress distribution inside the connecting bridge during the lifting process.

[0058] It should be noted that the step of installing the remaining rods in step S6 includes:

[0059] The tower crane hoists the outer cantilever beams and edge beams of the bridge facade truss onto the bridge and welds them;

[0060] Lay the truss floor deck and pour concrete.

[0061] After the connecting bridge is hoisted to the designated installation point, the lifting mechanism provided in step S2 can be removed, and then the remaining components required for the connecting bridge can be hoisted by the tower crane, and the subsequent welding and assembly can be completed.

[0062] It should be noted that pre-installed sections are provided on the low, middle and high connecting bridge installation points, and the pre-installed sections are used to dock with the connecting bridge and temporarily carry the lifted connecting bridge to facilitate subsequent adjustment and temporary fixation of the connecting bridge.

[0063] In this application, the step S4 also includes the following steps:

[0064] The lifting mechanism above the low-position connecting bridge installation point pre-lifts the connecting bridge before formal lifting, so as to drive the connecting bridge to separate from the connecting bridge assembly frame and leave it still for 12 hours, and monitor the deformation of the connecting bridge during the lifting process in real time.

[0065] Through the above steps, after the assembly of the connecting bridge in the connecting bridge assembly frame is completed, it is lifted off the ground and the connecting bridge off the ground is inspected to predict the stress ratio of all rods under different lifting conditions during the subsequent lifting process, and to judge whether the position of the connecting bridge lifting point is appropriate based on the stress distribution.

[0066] Furthermore, the step S4 and the step S5 also include a monitoring step for monitoring the entire lifting process.

[0067] In a preferred embodiment, the monitoring step includes a computer system measurement step and a measurement tool measurement step.

[0068] It should be noted that the computer system measurement step includes:

[0069] a1. Set monitoring points on the lifting mechanism and the connecting bridge, and deploy sensors. The sensors at each point will feed back data to the computer for centralized processing. Through data feedback and control command transmission, various information during the connecting bridge lifting process is monitored;

[0070] a2. The operator remotely observes the hydraulic pushing process of the lifting mechanism and related data and issues control instructions through the computer control system;

[0071] a3. After lifting into place, the surveyors use measuring tools to measure the accurate displacement values ​​of each monitoring point.

[0072] In the above steps, the "hydraulic synchronous lifting construction technology" was adopted. This technology adopts sensor detection and computer centralized control. Through data feedback and control command transmission, it can realize multiple functions such as synchronous action, load balancing, posture correction, stress control, operation locking, process display and fault alarm. Through the operation of the computer human-machine interface, automatic control, sequential control (single-stroke action), manual control and inching operation of a single lifter can be realized, so as to achieve the special requirements of synchronous displacement, installation displacement adjustment, single-point fine-tuning, etc. required in the overall lifting and installation process of the steel truss. The overall lifting is carried out strictly in accordance with the special construction plan. During the lifting process, professional and technical personnel comprehensively check the working status of the hydraulic equipment. If any problems are found, they must be reported immediately and a treatment plan will be formulated to keep the entire lifting process safe and controllable.

[0073] It should be further explained that the measuring step of the measuring tool includes:

[0074] b1. When the structure is just off the ground and before it is officially lifted, the initial position of each lifting point needs to be measured. Based on the measurement results, the height of each lifting rope of the lifting mechanism is adjusted so that each lifting point is at the same height to ensure that the structural posture meets the design requirements.

[0075] b2. During the formal lifting stage, as the lifting height increases, measurement is performed every 5 meters. After each measurement is completed, the height of each lifting point is adjusted according to the measurement result until all lifting points are at the same height.

[0076] b3. During the lifting and positioning stage, when the structure is lifted to about 20 cm from the designed height, each lifting point position needs to be measured. In this stage, the lifting frequency of the lifting mechanism needs to be lowered, and the measurement should be carried out in cooperation with the surveying personnel to ensure accurate alignment of the structural rods.

[0077] In the above steps, it is necessary to add that a corresponding reflector is provided on the bridge body, and a measuring instrument is used for measurement. The specific measuring instrument may be a total station.

[0078] Specifically, in step b1, since the top of the bridge is not flat and there is a corresponding height difference between the lifting points on the bridge, the height of the sling needs to be adjusted to match the height difference and ensure the stability of the overall posture of the bridge during the lifting process to meet the safety requirements of lifting.

[0079] In step b2, since the various lifting mechanisms cannot be fully synchronized during operation during the lifting process, it is inevitable that there will be deviations in the moving distances between the various lifting cables. To ensure stability, it is necessary to readjust after lifting a certain distance to ensure the stability of the connecting bridge during the lifting process.

[0080] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0081] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0082] In addition, "plurality" means two or more.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for hoisting a mid-high level bridge, characterized in that: The following steps are involved: S1. Preset low, middle and high bridge installation points between buildings; S2, installing a connecting bridge assembly frame between the connecting floors of the building, and assembling the connecting bridge on the connecting bridge assembly frame; S3, arranging a lifting mechanism above the lower, middle and upper bridge installation points; S4, the lifting mechanism above the low-position connecting bridge installation point lifts the connecting bridge to the low-position connecting bridge installation point; S5, the lifting mechanism above the middle connecting bridge installation point lifts the connecting bridge at the low connecting bridge installation point to the middle connecting bridge installation point; S6, the lifting mechanism above the high-position connecting bridge installation point lifts the connecting bridge at the middle-position connecting bridge installation point to the high-position connecting bridge installation point, and connects and fixes the connecting bridge through temporary measures; S7. Measure and correct the position of the connecting bridge, install the remaining rods and weld them, and fix the connecting bridge to the corresponding connecting bridge installation point.

2. According to claim 1, a method for hoisting a mid-high bridge is characterized in that: The following steps are also included: S8. The lifting mechanism hoists the cantilever beams and edge beams of the remaining trusses of the connecting bridge to the connecting bridge and completes the overall welding with the connecting bridge; S9. After the construction of the cantilever structure inside the building is completed, the truss floor deck is laid and concrete is poured.

3. A method for hoisting a mid-high level bridge according to claim 1, characterized in that: The bridge assembly step in step S2 further includes: Setting a bridge truss, wherein the bridge truss does not include the outer cantilever beams and edge beams of the bridge facade truss; The bridge truss is coated with fire retardant paint, and steel bars are laid and studs are welded inside the bridge truss; Temporary reinforcement rods are welded inside the connecting bridge trusses to form the connecting bridge.

4. A method for hoisting a mid-high level bridge according to claim 3, characterized in that: The step of installing the remaining rods in step S6 includes: The tower crane hoists the outer cantilever beams and edge beams of the bridge facade truss onto the bridge and welds them; Lay the truss floor deck and pour concrete.

5. According to claim 1, a method for hoisting a mid-high level bridge is characterized in that: Pre-installed sections are arranged on the lower, middle and upper connecting bridge installation points, and the pre-installed sections are used for connecting with the connecting bridge.

6. A method for hoisting a mid-high level bridge according to claim 1, characterized in that: The step S4 also includes the following steps: The lifting mechanism above the low-position connecting bridge installation point pre-lifts the connecting bridge before formal lifting, so as to drive the connecting bridge to separate from the connecting bridge assembly frame and leave it still for 12 hours, and monitor the deformation of the connecting bridge during the lifting process in real time.

7. A method for hoisting a mid-high level bridge according to claim 6, characterized in that: The steps S4 and S5 also include a monitoring step for monitoring the entire lifting process.

8. A method for hoisting a mid-high level bridge according to claim 7, characterized in that: The monitoring step includes a computer system measurement step and a measurement tool measurement step.

9. A method for hoisting a mid-high level bridge according to claim 8, characterized in that: The computer system measurement step comprises: a1. Set monitoring points on the lifting mechanism and the connecting bridge, and deploy sensors. The sensors at each point will feed back data to the computer for centralized processing. Through data feedback and control command transmission, various information during the connecting bridge lifting process is monitored; a2. The operator remotely observes the hydraulic pushing process of the lifting mechanism and related data and issues control instructions through the computer control system; a3. After lifting into place, the surveyors use measuring tools to measure the accurate displacement values ​​of each monitoring point.

10. A method for hoisting a mid-high level bridge according to claim 9, characterized in that: The measuring tool measuring step comprises: b1. When the structure is just off the ground and before it is officially lifted, the initial position of each lifting point needs to be measured. Based on the measurement results, the height of each lifting rope of the lifting mechanism is adjusted to ensure that the structural posture meets the design requirements. b2. During the formal lifting stage, as the lifting height increases, measurement is performed every 5 meters. After each measurement is completed, the height of each lifting point is adjusted according to the measurement result. b3. During the lifting and positioning phase, when the structure is lifted to the specified distance, each lifting point position needs to be measured. During this phase, the lifting frequency of the lifting mechanism needs to be lowered, and the measurement must be carried out in cooperation with the surveying personnel to ensure accurate alignment of the structural members.

Images