Overall lifting construction method for large-section closure section of stoplog frame cooperative system bridge

Abstract

The invention relates to an integral lifting construction method for a closure section of a large bridge section of a stoplog frame cooperative system. The integral lifting construction method comprises the steps that the closure section is processed and manufactured in a segmented mode under the transportation height limiting condition; temporary steel pier supports are arranged in the transportation process before a high-rigidity stoplog frame is formed, so that the overall linear stability of a beam section is kept; after the closure section is transported to a site, the frame rod pieces are completely assembled in the height direction; intelligent synchronous lifting equipment is adopted, and the closure section is integrally lifted in place. According to the construction method, the roof part, small in rigidity contribution, of the whole lifting section can be reduced, only the stoplog and frame combination body large in rigidity contribution is reserved, reinforcing rods are additionally arranged on the super-long closure section to improve the whole strength, rigidity and stability of the lifting section, the lifting section is transported in a segmented mode, and the whole linear stability of the lifting section is kept in the field splicing and transporting process. The problems that the rigidity of the overall lifting super-long section closure section is poor, and secondary assembly of the super-long section closure section and the line type of the closure section are difficult to guarantee due to limitation of construction conditions such as a channel are solved.

Description

Technical Field

[0001] The invention relates to a construction method of a stacked beam frame cooperative system, in particular to an overall lifting construction method of a large-segment closure section of a stacked beam frame cooperative system bridge. Background Art

[0002] With the rapid development of construction technology and society, the architectural appearance of bridges is more beautiful and the structural stress is more innovative. The existing long segment stiffness of the bridge joint section can meet the stability of the end point lifting structure, and the lifting weight of the overall lifting section will not cause the stress of the bridge structure other than the joint section to exceed the limit. The existing bridge joint section is processed and manufactured into a complete segment and transported to the bridge site for lifting. The height of the bridge joint section will not be limited by the transportation height, so there is no need to splice the overall lifting section on site. This problem has not been solved, and the length of the joint section is generally shortened. This method represents an increase in the hoisting part of the bracket, and the bracket will occupy more waterway width, affecting navigation safety, low construction efficiency, and poor construction safety. Therefore, it is necessary to provide a method for overall lifting construction of the large segment joint section of the bridge with a stacked beam frame collaborative system, reduce the roof part with a small contribution to the overall lifting section, and only retain the stacked beam and frame assembly with a large contribution to the stiffness. The super-long joint section adds reinforcement rods to improve the overall strength, stiffness, and stability of the lifting section. The lifting section is transported in sections and assembled on site, and the overall linear stability of the lifting section is maintained during transportation. Summary of the invention

[0003] The purpose of the present invention is to provide a method for overall lifting construction of a large-segment joint section of a bridge with a stacked beam frame cooperative system, so as to solve the problem of poor stiffness of the overall lifting of the super-long segment joint section, and at the same time solve the problem of difficulty in secondary assembly of the super-long segment joint section and ensuring the linear shape of the joint section caused by restrictions on construction conditions such as waterways.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a method for overall lifting construction of a large-section joint section of a bridge with a stacked beam frame cooperative system, comprising: the large-section joint section is processed and manufactured in sections under the transportation height limit condition; before forming a stacked beam frame with strong rigidity, temporary steel piers are set during transportation to support the overall stability of the beam section line; after the joint section is transported to the site, the frame rods are completely assembled in the height direction; and intelligent synchronous lifting equipment is used to lift the joint section into place as a whole.

[0005] Furthermore, for the processing of the joint section, the joint section is selected in the middle of the span of the bridge and is located above the center of the waterway. The joint section is composed of a combination of a small number of stacked beams and frames, and its height exceeds the navigation limit. During processing, the columns are disconnected at an appropriate position to reduce the transportation height of the joint section. When processing the stacked beams, stiffening plates are pre-installed inside the main longitudinal beams at the location of the lifting ears and welded firmly.

[0006] Furthermore, for the transportation of the joint section, a large flatbed transport ship is used, and temporary steel piers are set at the bottom of the lifting section to maintain the overall stability of the beam section line. The hull below the position where the temporary steel piers are set on the deck of the transport ship is reinforced and the force is diffused to ensure that the line shape of the joint beam section will not be damaged due to the deformation of the transport ship deck.

[0007] Furthermore, the joint section is assembled on site. After the joint section is transported to the site, the upper longitudinal beam assemblies are installed in place respectively, and the columns and upper longitudinal beams are aligned, installed and welded to assemble into a steel structure integral lifting bridge joint section in which the stacked beams and frames cooperate to bear the force.

[0008] Furthermore, before lifting the joint section as a whole, the welding and installation of the lifting reinforcement rods are carried out. The lifting reinforcement rods include the lifting area reinforcement diagonal braces, the lifted area reinforcement diagonal braces, the lifting area transverse reinforcement K-braces, the lifted area transverse reinforcement K-braces, and the connecting distribution beams.

[0009] Furthermore, intelligent synchronous lifting equipment is adopted, and lifting equipment and steel strand guide frames, distribution beams and operating platforms, steel strands, bottoms and lifting ears are set; two symmetrical sets of lifting equipment are set on each upper longitudinal beam, and the lifting equipment is set on the distribution beam above the upper longitudinal beam. A steel strand guide frame is set between the two sets of lifting equipment. The steel strand passes through the lifting equipment and is connected to the bottom anchor through a clip at the bottom. The bottom anchor and the hoisting device set on the bridge deck of the large section joint section are connected through a pin shaft.

[0010] Further, the specific construction steps of the method are:

[0011] Step 1: Complete the installation and welding inspection of the non-jointed stacked beam segments and roof truss members;

[0012] Step 2: After the pre-camber data is measured on the flatbed transport ship and confirmed, the overall lifting closure section is assembled to form an overall lifting section where the stacked beam and the frame are coordinated to bear the force;

[0013] Step 3: Install the lifting area reinforcement diagonal brace and the lifting area transverse reinforcement K brace in the lifting area of ​​the non-joint section structure; install the lifting area reinforcement diagonal brace and the lifting area transverse reinforcement K brace on the overall lifting joint section;

[0014] Step 4: Install the distribution beam, operating platform, lifting equipment, and guide frame in the lifting area, connect the upper end of the steel strand to the lifting equipment, install the bottom anchor at the lower end of the steel strand, and weld and install the lifting device on the overall lifting joint section;

[0015] Step 5: Use laser scanning equipment to measure the joint port data and cut the joint port margin;

[0016] Step 6: With the assistance of the mooring cable and the small boat, the flatbed transport ship moves the large segment joint section to the bridge projection line, and at the same time lowers the bottom anchor and installs the pin connection between the sling; when installing the bottom anchor, the steel strands should be parallel and not entangled;

[0017] Step 7: Start lifting with staged loading until the lifting section is separated from the hull. During the loading process, check the lifting obstacles, measure the elevation of the lifting section and adjust the level, and check the working status of each lifting device;

[0018] Step 8: Before lifting to the position, check the size of the gap at the joint, set the horizontal wire rope and hand chain hoist to correct the longitudinal deviation of the lifting section, and use the jack to correct the transverse deviation of the welding code plate;

[0019] Step nine: After the stacked beam ports and upper longitudinal beams are welded and tested to be qualified, unload and dismantle the lifting equipment and remove the temporary reinforcement structure.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides a method for overall lifting construction of a large-segment joint section of a bridge with a stacked beam-frame cooperative system, which can reduce the roof part with a small contribution to the stiffness of the overall lifting section and only retain the stacked beam and frame combination with a large contribution to the stiffness. The extra-long joint section is reinforced with additional rods to improve the overall strength, stiffness and stability of the lifting section. The lifting section is transported in sections and assembled on site, and the overall linear stability of the lifting section is maintained during the transportation process.

[0022] The present invention solves the problem of poor rigidity of the overall lifting super-long segment closure section itself, and simultaneously solves the problem of difficulty in secondary assembly of the super-long segment closure section and ensuring the linear shape of the closure section caused by restrictions on construction conditions such as waterways. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall lifting construction method of the large segment closure section of the stacked beam frame cooperative system bridge of the present invention;

[0024] Figure 2 It is the drawing of the poles assembled on site of the lifting section;

[0025] Figure 3 It is a schematic diagram of the transportation and support of the overall lifting section;

[0026] Figure 4 It is to lift the upper end anchorage setting;

[0027] Figure 5 It is to enhance the lower end anchor setting. DETAILED DESCRIPTION

[0028] 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 are clearly and completely described below in conjunction with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions. They are only a representative part of the present invention and can demonstrate the characteristics of the present invention.

[0029] like Figures 1 to 5 As shown, the present invention provides a method for overall lifting of the joint section of a large-segment bridge of a stacked beam frame cooperative system, comprising: the joint section is processed and manufactured in sections under transportation height restrictions; before a stacked beam frame with relatively strong rigidity is formed, temporary steel pier supports are set during transportation to maintain the overall stability of the beam section line; after the joint section is transported to the site, the frame rods are completely assembled in the height direction; and intelligent synchronous lifting equipment is used to lift the joint section into place as a whole.

[0030] The processing of the joint section is selected in the middle of the span of the bridge and is located above the center of the waterway. The large-segment joint section is composed of a combination of a small number of stacked beams and frames, and its height exceeds the navigation height limit 1. During processing, the columns are disconnected at an appropriate position to reduce the transportation height of the joint section; when processing the stacked beams, stiffening plates are pre-arranged inside the main longitudinal beam at the position of the lifting ear 5 and welded firmly.

[0031] For the transportation of the joint section, a large flatbed transport ship is used. Temporary steel piers are set at the bottom of the lifting section to maintain the overall stability of the beam section line. The hull below the position where the temporary steel pier support is required on the deck of the transport ship is reinforced and the force is diffused to ensure that the line shape of the joint beam section will not be damaged due to deformation of the transport ship deck.

[0032] On-site assembly of the joint section. After the large section joint section is transported to the site, the upper longitudinal beam assembly 2 is installed in place respectively, the columns and the upper longitudinal beams are aligned, installed and welded, and assembled into a steel structure integral lifting bridge joint section with coordinated force of the stacked beam and the frame.

[0033] The welding and installation of the lifting reinforcement rods, the lifting reinforcement rods include the lifting area reinforcement diagonal brace 7, the lifted area reinforcement diagonal brace 3, the lifting area transverse reinforcement K brace 8, the lifted area transverse reinforcement K brace 4, and the connecting distribution beam 9.

[0034] Intelligent synchronous lifting equipment is adopted, and lifting equipment 10 and steel strand guide frame 11, distribution beam 12 and operating platform, steel strand 6, bottom anchor 13 and lifting lug 5 are set; two symmetrical groups of lifting equipment are set on each upper longitudinal beam, and the lifting equipment is set on the distribution beam above the upper longitudinal beam. A steel strand guide frame is set between the two groups of lifting equipment. The steel strand passes through the lifting equipment and is connected to the bottom anchor through a clip at the bottom. The bottom anchor and the hoisting device set on the bridge deck of the large section joint section are connected through a pin shaft.

[0035] The invention discloses a method for integrally lifting a large segment closure section of a bridge of a stacked beam frame cooperative system, and the specific steps are as follows:

[0036] Step 1: Complete the installation and welding inspection of the non-jointed stacked beam segments and roof truss members;

[0037] Step 2: After the pre-camber data is measured on the flatbed transport ship and confirmed, the overall lifting joint section is assembled to form an overall lifting section where the stacked beam and the frame are coordinated in force;

[0038] Step 3: Install the lifting area reinforcement diagonal brace and the lifting area transverse reinforcement K brace in the lifting area of ​​the non-joint section structure; install the lifting area reinforcement diagonal brace and the lifting area transverse reinforcement K brace on the overall lifting joint section;

[0039] Step 4: Install the distribution beam, operating platform, lifting equipment, and guide frame in the lifting area, connect the upper end of the steel strand to the lifting equipment, install the bottom anchor at the lower end of the steel strand, and weld and install the lifting device on the overall lifting joint section;

[0040] Step 5: Use laser scanning equipment to measure the joint port data and cut the joint port margin;

[0041] Step 6: With the assistance of the mooring cable and the small boat, the flatbed transport ship moves the large segment joint section to the bridge projection line, and at the same time lowers the bottom anchor and installs the pin connection between the sling; when installing the bottom anchor, the steel strands should be parallel and not entangled;

[0042] Step 7: Start lifting with staged loading until the lifting section is separated from the hull. During the loading process, check the lifting obstacles, measure the elevation of the lifting section and adjust the level, and check the working status of each lifting device;

[0043] Step 8: Before lifting to the position, check the size of the gap at the joint, set the horizontal wire rope and hand chain hoist to correct the longitudinal deviation of the lifting section, and use the jack to correct the transverse deviation of the welding code plate;

[0044] Step nine: After the stacked beam ports and upper longitudinal beams are welded and tested to be qualified, unload and dismantle the lifting equipment and remove the temporary reinforcement structure.

Claims

1. A method for overall lifting of a large segment closure section of a bridge of a stacked beam frame cooperative system, characterized in that: include: The large-segment joint section is processed and manufactured in sections under the transportation height limit conditions; before forming a strong and rigid stacked beam frame, temporary steel piers are set up during transportation to support the overall stability of the beam segment line; after the joint section is transported to the site, the frame rods are fully assembled in the height direction; and intelligent synchronous lifting equipment is used to lift the joint section into place as a whole.

2. The method for overall lifting of the large segment closure section of a stacked beam frame cooperative system bridge according to claim 1 is characterized in that: The processing of the joint section is selected in the middle of the span of the bridge and is located above the center of the waterway. The joint section is a combination of a small number of stacked beams and frames, and its height exceeds the navigation limit. During processing, the columns are disconnected at an appropriate position to reduce the transportation height of the joint section. When processing the stacked beams, stiffening plates are pre-installed inside the main longitudinal beams at the location of the lifting ears and welded firmly.

3. The overall lifting construction method of the large segment closure section of the stacked beam frame cooperative system bridge according to claim 1 is characterized by: For the transportation of the joint section, a large flatbed transport ship is used for the joint section. Temporary steel piers are set at the bottom of the lifting section to maintain the overall stability of the beam section line. The hull below the position where the temporary steel piers are set on the deck of the transport ship is reinforced and the force is diffused to ensure that the line shape of the joint beam section will not be damaged due to the deformation of the transport ship deck.

4. The overall lifting construction method of the large segment closure section of the stacked beam frame cooperative system bridge according to claim 1 is characterized by: On-site assembly of the joint section. After the joint section is transported to the site, the upper longitudinal beam assemblies are installed in place respectively, the columns and upper longitudinal beams are aligned, installed and welded to assemble into a steel structure integral lifting bridge joint section with coordinated force of stacked beams and frames.

5. The method for overall lifting of a large segment closure section of a stacked beam frame cooperative system bridge according to claim 1 is characterized in that: Before lifting the joint section as a whole, the welding and installation of the lifting reinforcement rods are carried out. The lifting reinforcement rods include the lifting area reinforcement diagonal braces, the lifted area reinforcement diagonal braces, the lifting area transverse reinforcement K-braces, the lifted area transverse reinforcement K-braces, and connecting distribution beams.

6. The method for overall lifting of a large segment closure section of a stacked beam frame cooperative system bridge according to claim 1 is characterized in that: Intelligent synchronous lifting equipment is used, and lifting equipment and steel strand guide frames, distribution beams and operating platforms, steel strands, bottoms and lifting ears are set; two symmetrical sets of lifting equipment are set on each upper longitudinal beam, and the lifting equipment is set on the distribution beam above the upper longitudinal beam. A steel strand guide frame is set between the two sets of lifting equipment. The steel strand passes through the lifting equipment and is connected to the bottom anchor through the clip at the bottom. The bottom anchor and the hoisting device set on the bridge deck of the large section joint section are connected through a pin shaft.

7. The method for overall lifting of a large segment closure section of a stacked beam frame cooperative system bridge according to claim 1 is characterized in that: The specific construction steps are: Step 1: Complete the installation and welding inspection of the non-jointed stacked beam segments and roof truss members; Step 2: After the pre-camber data is measured on the flatbed transport ship and confirmed, the overall lifting closure section is assembled to form an overall lifting section where the stacked beam and the frame are coordinated to bear the force; Step 3: Install the lifting area reinforcement diagonal brace and the lifting area transverse reinforcement K brace in the lifting area of ​​the non-joint section structure; install the lifting area reinforcement diagonal brace and the lifting area transverse reinforcement K brace on the overall lifting joint section; Step 4: Install the distribution beam, operating platform, lifting equipment, and guide frame in the lifting area, connect the upper end of the steel strand to the lifting equipment, install the bottom anchor at the lower end of the steel strand, and weld and install the lifting device on the overall lifting joint section; Step 5: Use laser scanning equipment to measure the joint port data and cut the joint port margin; Step 6: With the assistance of the mooring cable and the small boat, the flatbed transport ship moves the large segment joint section to the bridge projection line, and at the same time lowers the bottom anchor and installs the pin connection between the sling; when installing the bottom anchor, the steel strands should be parallel and not entangled; Step 7: Start lifting with staged loading until the lifting section is separated from the hull. During the loading process, check the lifting obstacles, measure the elevation of the lifting section and adjust the level, and check the working status of each lifting device; Step 8: Before lifting to the position, check the size of the gap at the joint, set the horizontal wire rope and hand chain hoist to correct the longitudinal deviation of the lifting section, and use the jack to correct the transverse deviation of the welding code plate; Step nine: After the stacked beam ports and upper longitudinal beams are welded and tested to be qualified, unload and dismantle the lifting equipment and remove the temporary reinforcement structure.

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