A method for installing a catenary cable stayed sphere structure

Abstract

The application discloses a kind of oblique cable suspension sphere structure's traction hoisting installation method, first sphere structure is assembled on ground, traction tool is set on the anchor point of oblique cable two sides, and lug plate is all perpendicular to earth setting;According to the iterative analysis of form finding and force finding, the design state and initial state of the sphere are determined, and the shape and cable force are determined;Then based on the whole process simulation analysis of traction hoisting, the upper anchor point coordinates of main structure are reversely pre-adjusted, and the upper and lower port coordinates are measured by combining three-dimensional scanning technology, and the zero stress cable length is accurately determined;Finally, by different speed, synchronous oblique traction of several fixed-length cables, the sphere is hoisted and installed to the construction in-place attitude, and after the additional dead load is applied, the sphere structure is deflected to the design state shape.The application can effectively realize the design state shape and cable force of the sphere structure suspended in the air, greatly save the construction measures, reduce the risk of high-altitude operation, and shorten the construction period.

Description

Technical Field

[0001] This invention relates to the field of steel structure building technology, specifically to a traction lifting and installation method for an inclined cable-stayed spherical structure. Background Technology

[0002] With the booming development of the construction market, the rationality of structural engineers and the romance of artists have been perfectly combined, and aerial cable-stayed spherical structures have gradually come into people's view. They define the feeling of space in a unique way to adapt to increasingly rich functional needs.

[0003] The suspended spherical structure is mainly composed of vertical ring beams, horizontal ring beams, diagonal braces, and floor steel beams. It is suspended from the main structure by cables. Its application in irregular-shaped buildings, which deviates from the traditional force-bearing mode, also brings new challenges to construction. The shape and cable force control are very difficult.

[0004] The conventional construction method of erecting temporary support frames and assembling in situ has problems such as high erection height of temporary support frames, large amount of construction measures, high risk of high-altitude operation, poor construction accuracy of spherical structures, and difficulty in ensuring the cable force of the structure in the formed state.

[0005] Therefore, there is an urgent need for an economical, reasonable, safe and efficient construction method for suspended spherical structures to solve the above problems. Summary of the Invention

[0006] To address the technical problems existing in the prior art, this invention provides a traction lifting and installation method for an inclined cable-stayed spherical structure. This method can effectively realize the state and position of the suspended spherical structure and cable force, greatly save construction measures, reduce the risks of high-altitude operations, and shorten the construction period.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a traction lifting and installation method for a spherical structure suspended by inclined cables. First, the spherical structure is assembled on the ground using ground assembly tools, and the traction tools are set on both sides of the anchor points on the inclined cables. Based on the iterative analysis of form finding and force finding, the design state and initial state configuration and cable force of the sphere are determined. Then, based on the simulation analysis of the entire traction lifting process, the coordinates of the anchor points on the main structure are pre-adjusted in reverse, and the coordinates of the upper and lower ends are measured by combining three-dimensional scanning technology to accurately determine the zero-stress cable length. Finally, the sphere is lifted and installed to the construction position by synchronously and obliquely tractioning several fixed-length cables at different speeds. After the additional constant load is applied, the spherical structure deflects to the design state configuration.

[0008] Furthermore, the ground assembly fixture is arranged around the sphere and includes two annular hoops composed of a bottom vertical support, an equatorial ring beam support, and multiple horizontal connecting rods, which respectively bear the vertical force during the sphere assembly process and the horizontal overturning force before the sphere is formed.

[0009] Further, the traction tool includes two traction tool ear plates on both sides, which are provided with cross-shaped insertion plates and three horizontally-strengthened plates for lateral support to improve the load bearing capacity of the ear plates, and the angle of the traction tool ear plates is perpendicular to the ground, and a cable ear plate connected to the lifting device is arranged between the traction tool ear plates.

[0010] Further, the traction tool ear plate and the cable ear plate pin hole are provided with a round hole at the horizontal axis, facilitating the installation of the pin shaft from the side; a traction hole is arranged below the round hole, and the angle of the center line of the two holes is consistent with the angle of the cable in the construction position.

[0011] Further, the reverse pre-adjustment is based on the deformation simulation analysis in the whole construction process, and the upper anchor point is pre-arched to ensure the design attitude of the main structure and the spherical structure.

[0012] Further, the zero-stress cable length is calculated according to the design attitude cable force and cable length.

[0013] Further, the fixed-length cable is measured by three-dimensional scanning of the upper and lower ports during the ground assembly stage, and the cable length is adjusted in the ground state in combination with the forming cable force value to accurately determine the zero-stress cable length.

[0014] Further, the different-speed synchronous oblique traction is used for cables with different angles, and a hydraulic synchronization control system is redeveloped to adjust the traction speed of each traction point according to the cable angle, so as to realize the different-speed, equal-proportion and synchronous oblique traction of cables with different angles.

[0015] The traction lifting installation method of the oblique cable hanging spherical structure includes the following steps:

[0016] Step one: perform simulation analysis of the whole traction lifting process to determine the assembly attitude, trial lifting attitude, construction position attitude and design forming attitude, and calculate the shape and cable force changes in different attitudes during the traction lifting process;

[0017] Step two: design the ground assembly support, main structure hanging node and cable anchoring tool according to the structural characteristics and cable angle changes during the construction process, and perform finite element calculation;

[0018] Step three: perform three-dimensional lofting and collision checking on the traction lifting attitudes, and adjust the secondary structure construction process which affects the traction lifting construction;

[0019] Step four: perform deepening design and processing of the bending-torsion component according to the characteristics of the spherical structure;

[0020] Step five: calculate the zero-stress cable length according to the design forming attitude cable force and cable length, cable elastic modulus and cable cross-sectional area.

[0021] Step six: carry out sphere assembly on the floor directly below the projection, and pre-arch the steel beam connected to the sphere interior floor steel beam and the main structure hanging node;

[0022] Step seven: re-measure the sphere assembly configuration and the main structure hanging node deviation, and accurately adjust the cable length in the ground state;

[0023] Step eight: install the tractor, steel strand, cable anchoring tooling and cable, perform trial lifting work, the sphere reaches the trial lifting posture, and check the traction lifting device, hydraulic synchronism control system, displacement monitoring equipment and tractor counterforce monitoring equipment;

[0024] Step nine: through monitoring the relative height difference of the sphere traction node, controlling the cable force and the tractor counterforce, different speed and synchronous traction of the sphere to the construction in-place posture, re-measure the configuration and cable force, and then install the cable node pin shaft;

[0025] Step ten: grade and synchronously unload the tractor, continuously monitor the sphere deformation and cable force change during the period, confirm the correctness, remove the tractor and cable anchoring tooling, and the traction lifting is completed;

[0026] Step eleven: sphere concrete pouring, curtain wall and decoration construction, after the additional dead load is completely applied, the design forming posture is reached, and the configuration and cable force are consistent with the design state.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] (1) The support frame erection height is reduced, the measure cost is saved, the amount of high-altitude operation is greatly reduced, the welding quality is ensured, and the safety of construction workers is ensured;

[0029] (2) The sphere structure assembly and the main structure construction can be simultaneously performed, the sphere structure traction lifting construction and the main structure decoration construction can be simultaneously performed, and the construction period is saved;

[0030] (3) Through simulation analysis of the whole traction lifting process, the configuration and cable force change in the traction lifting process are calculated, the cable length under the zero stress state is inversely calculated, and the fixed-length cable is tractioned;

[0031] (4) Through displacement monitoring, cable force monitoring and lifter counterforce monitoring, the in-air posture and structure forming posture configuration in the traction lifting process are accurately controlled, and the construction safety and construction quality are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the axial side view of the hanging sphere structure of the embodiment of the present application;

[0033] Figure 2 It is the schematic view of the sphere structure traction lifting process of the embodiment of the present application;

[0034] Figure 3 Figure 2 is a side view of a ground assembling support shaft of an embodiment of the present application;

[0035] Figure 4 Figure 3 is a side view of a traction tool of an embodiment of the present application;

[0036] Figure 5 Figure 4 is a side view of a diagonal traction process of an embodiment of the present application;

[0037] Figure 6 Figure 5 is a top view of a traction in position of an embodiment of the present application. DETAILED DESCRIPTION

[0038] Reference Figures 1 to 6 The traction and lifting installation method of the diagonal cable suspension sphere structure of the present application is further described in detail.

[0039] The embodiment of the present project is a dome theater of a science and technology museum in a certain city, which is a suspension sphere structure, mainly composed of vertical ring beams, horizontal ring beams, diagonal rods and floor steel beams, and is suspended on the main structure by cables.

[0040] The specific implementation includes the following steps:

[0041] Step 1: Perform simulation analysis of the entire traction and lifting process to determine the assembling posture 1, the trial lifting posture 2, the construction in position posture 3 and the design forming posture 4, and calculate the shape and cable force changes of different postures in the traction and lifting process;

[0042] Step 2: According to the structural characteristics and the angle change of the cable 6 in the construction process, design the ground assembling support 5, the main structure cable upper anchor point 8 and the cable anchoring tool 11, and perform finite element calculation;

[0043] Step 3: Perform three-dimensional lofting and collision checking on different postures of traction and lifting, and adjust the secondary structure construction process which affects the traction and lifting construction;

[0044] Step 4: According to the characteristics of the sphere structure 10, perform deepening design and processing of the bending and torsion components;

[0045] Step 5: According to the design forming posture cable force and cable length, cable elastic modulus and cable cross-sectional area, calculate the blanking length of the cable 6 under the zero stress state;

[0046] Step 6: Assemble the sphere on the floor directly below the projection, and pre-arch the steel beams connected with the main structure cable upper anchor point 8 inside the sphere;

[0047] Step 7: Re-measure the sphere assembling shape and the deviation of the main structure cable upper anchor point 8, and accurately adjust the cable length on the ground;

[0048] Step eight: install the traction device 12, steel strand 7, cable anchor tool 11 and cable 6, and perform trial lifting work. The ball reaches the trial lifting posture 2, and the traction lifting device, hydraulic synchronization control system, displacement monitoring equipment and traction counterforce monitoring equipment are checked;

[0049] Step nine: through monitoring the relative height difference of the ball traction node, controlling the cable force and the counterforce of the traction device 12, the ball is tractioned at different speeds and synchronously to the construction in-place posture. After the re-measurement of the shape and cable force is correct, the cable node pin shaft 13 is installed;

[0050] Step ten: the traction device 12 is unloaded in stages and synchronously. During the period, the ball deformation and cable force change are continuously monitored. After the confirmation of no error, the traction device 12 and the cable anchor tool 11 are removed, and the traction lifting is completed.

[0051] Step eleven: the ball concrete is poured, the curtain wall and decoration construction are performed, and after the additional dead load is applied, the design forming posture 4 is reached, and the shape and cable force are consistent with the design state.

[0052] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and refinements without departing from the principles of the present application are also considered as the protection scope of the present application.

Claims

1. A method of installing a catenary cable stayed sphere structure by tension lifting, characterised in that: Firstly, the spherical structure is assembled on the ground by using ground assembly tooling, and the traction tooling is arranged on both sides of the anchor point of the inclined cable; according to the iterative analysis of shape finding and force finding, the design forming posture of the sphere, the position and cable force of the construction in-place posture are determined; then, based on the simulation analysis of the whole process of traction lifting, the coordinates of the upper anchor point of the main structure are reversely pre-adjusted, and the upper and lower port coordinates are measured by combining the three-dimensional scanning technology, so as to accurately determine the zero stress cable length; finally, the sphere is lifted and installed to the construction in-place posture by using the different speed synchronous inclined traction of several fixed length cables, and after the additional constant load is applied, the sphere structure is deflected to the design forming posture; The different speed synchronous inclined traction is developed by redeveloping the hydraulic synchronism control system, adjusting the traction speed of each traction point according to the angle of the cable, and realizing the different speed, equal proportion and synchronism of the inclined traction of the cable with different angles.

2. The method of claim 1, wherein: The ground assembly tooling is arranged around the sphere and includes two annular hoops composed of bottom vertical supports, equatorial ring beam supports and multiple horizontal connecting rods, which bear the vertical force in the sphere assembly process and the horizontal overturning force before the sphere is formed, respectively.

3. The method of claim 1, wherein: The traction tooling ear plate is provided with a cross-shaped plug-in plate for improving the bearing capacity of the ear plate and three lateral supporting horizontal stiffening plates, and the angle of the traction tooling ear plate is perpendicular to the ground.

4. The method of claim 3, wherein: The traction tooling ear plate and the cable ear plate are provided with round holes at the same horizontal axis of the pin shaft hole, so that the pin shaft can be installed from the side; a traction hole is formed below the round hole, and the angle of the center line connecting the two holes of the round hole and the traction hole is consistent with the angle of the cable in the construction in-place posture.

5. The method of installing a stay cable hung spherical structure by tensioning and lifting as claimed in claim 1, wherein: The reverse pre-adjustment is to pre-arch the upper anchor point according to the simulation analysis of the whole construction process, so as to ensure that the main structure and the sphere structure reach the design forming posture.

6. The method of installing a stay cable hung spherical structure by tensioning and lifting as claimed in claim 1, wherein: The zero stress cable length is calculated according to the design forming posture cable force and cable length.

7. The method of installing a stay cable hung spherical structure by tensioning and lifting according to claim 1, wherein: The fixed length cable is measured by three-dimensional scanning of the upper and lower ports during the ground assembly stage, and the cable length is adjusted in the ground state by combining the forming state cable force value, so as to accurately determine the zero stress cable length.

8. The method of claim 1, wherein the method further comprises: Specifically, the following steps are included: Step one: perform simulation analysis of the whole process of traction lifting, determine the assembly posture, trial lifting posture, construction in-place posture and design forming posture, and calculate the position and cable force changes in different postures during the traction lifting process; Step two: according to the structural characteristics and the angle change of the cable during the construction process, design the ground assembly support, main structure hanging node and cable anchoring tooling, and perform finite element calculation; Step three: perform three-dimensional lofting and collision checking on the traction lifting in different postures, and adjust the local construction process of the secondary structure which affects the traction lifting construction; Step four: perform deepening design and processing of the bending and torsion components according to the characteristics of the sphere structure; Step five: calculate the zero stress state cable length according to the design forming posture cable force and cable length, cable elastic modulus and cable cross-sectional area; Step six: assemble the sphere on the projection directly below the floor, and pre-arch the steel beams in the sphere and the steel beams connected with the main structure hanging node; Step seven: re-measure the sphere assembly position and the deviation of the main structure hanging node, and accurately adjust the cable length in the ground state. Step eight: install the tractor, steel strand, cable anchor tooling and cable, and perform a trial lifting work. The ball reaches the trial lifting posture, and the traction lifting device, hydraulic synchronization control system, displacement monitoring equipment and tractor reaction force monitoring equipment are checked; Step nine: through the monitoring of the relative height difference of the ball traction node, the control of the cable force and the traction force, the ball is tractioned to the construction position at different speeds and synchronously. After the re-measurement of the shape and cable force is correct, the cable node pin shaft is installed; Step ten: the tractor is unloaded in stages and synchronously. During this period, the ball deformation and cable force change are continuously monitored. After confirmation, the tractor and cable anchor tooling are removed, and the traction lifting is completed; Step eleven: the ball concrete is poured, the curtain wall and decoration construction are carried out, and the additional dead load is fully applied. After that, the design shaping posture is reached, and the shape and cable force are consistent with the design state.

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