阅读说明：本技术 异形曲线结构钢混组合塔节段及制造工艺 (Special-shaped curve structure steel-concrete combined tower segment and manufacturing process ) 是由 王晓辉 朱新华 谭敏刚 李艳停 韓欢 杨宝堂 于 2021-08-20 设计创作，主要内容包括：本发明涉及一种异形曲线结构钢混组合塔节段及制造工艺,钢混组合塔截面为异形曲线截面,由R1m、R3m圆弧曲线和过渡直线组成,塔高方向为变截面且呈曲线变化,塔柱节段由箱内壁板、曲线外壁板、分仓板、箱内连接件和横竖向钢筋组成。优点：一是实现了复杂曲线结构放样；二是采用板单元分块、特殊工装约束、基准网监测、合理组拼顺序成功实现了异形曲线钢混组合塔节段组拼精度控制,提升了钢混组合塔加工制造技术水平；三是实现钢混组合塔节段焊接变形控制,是复杂异形曲线结构线形控制技术的突破；四是采用过程监测、成品检测、实体预拼检验等不同检测方法,实现施工过程的质量精度控制,确保了项目最终产品质量。(The invention relates to a special-shaped curve structure steel-concrete combined tower section and a manufacturing process thereof, wherein the section of the steel-concrete combined tower is a special-shaped curve section and consists of R1m, R3m circular arc curves and transition straight lines, the tower height direction is variable section and changes in a curve manner, and the tower column section consists of a box inner wall plate, a curve outer wall plate, a bin dividing plate, a box inner connecting piece and transverse and vertical reinforcing steel bars. The advantages are that: firstly, the lofting of a complex curve structure is realized; secondly, the assembly precision control of the special-shaped curve steel-concrete combined tower section is successfully realized by adopting the plate unit blocking, special tool constraint, reference net monitoring and reasonable assembly sequence, and the processing and manufacturing technical level of the steel-concrete combined tower is improved; thirdly, welding deformation control of the steel-concrete combined tower sections is realized, and the method is a breakthrough of a linear control technology of a complex special-shaped curve structure; and fourthly, different detection methods such as process monitoring, finished product detection, entity pre-assembly inspection and the like are adopted, so that quality precision control in the construction process is realized, and the quality of the final product of the project is ensured.)

1. The utility model provides a special-shaped curved structure reinforced concrete combination tower segment which characterized by: the cross section of the steel-concrete combined tower is a special-shaped curve cross section and consists of R1m, R3m circular arc curves and transition straight lines, the tower height direction is variable cross section and changes in a curve mode, and the tower column segment consists of a box inner wall plate (1), a curve outer wall plate (4), a bin separating plate (5), a box inner connecting piece (2) and transverse and vertical reinforcing steel bars (3).

2. The special-shaped curved-structure steel-concrete combined tower segment as claimed in claim 1, wherein: the box inner wall plate (1) is a plane plate unit.

3. The special-shaped curved-structure steel-concrete combined tower segment as claimed in claim 1, wherein: the curved outer wall plate (4) is a bidirectional curved plate unit or a twisted plate unit.

4. The special-shaped curved-structure steel-concrete combined tower segment as claimed in claim 1, wherein: the bin distribution plate (5) is a plane plate unit.

5. A manufacturing process of a special-shaped curve structure reinforced concrete combined tower section is characterized by comprising the following steps:

the process for machining curve parts comprises the following steps: according to the design structure and the line shape, lofting the curve part by adopting a digital model mode; combining a structure processing technology, and additionally arranging a technology allowance on the curve part; acquiring a two-dimensional outline of the curve part by utilizing a metal plate unfolding function of three-dimensional software; generating a procedural file by using compiling software, and arranging a datum line by adopting numerical control cutting equipment for blanking and laser automatic scribing; machining the periphery of the part, opening a groove and the like by using mechanical equipment; performing curve molding on the part by adopting cold press molding equipment and thermal correction measures;

a manufacturing process of the curve plate unit comprises the following steps: the curve-shaped outer wall plate unit is manufactured by adopting a curve tool, and the tool is designed into an adjustable movable tool so as to be convenient to adapt to the change of the structure size; after the curve outer wall plate is formed on the tool, the curve outer wall plate is fixedly connected with the tool by rigid fastening, and the plate rib is tightly assembled with the curve outer wall plate; the plate unit welding is carried out by adopting a CO2 gas shielded welding process with small linear energy, the welding sequence, the symmetrical welding, the welding parameters and the like are strictly controlled, and the deformation is reduced; after welding, removing the rigid fastener, detecting the plate unit, and finishing local deformation by adopting a thermal correction process until the precision of the plate unit meets the standard requirement; sequentially penetrating steel bars with processed end connecting threads into the steel bar holes of the transverse ribs and the vertical ribs of the plate units, and fixing by adopting a temporary tool;

the segment assembling process comprises the following steps: according to the segment structure characteristics, the assembling sequence of each plate unit is specified, the assembling scheme is simulated through a BIM digital model, the assembling sequence is continuously optimized, and each unit is ensured to be assembled smoothly; designing and manufacturing a special tool according to the size and the line shape of the segment, wherein the deviation of the flatness of the bottom surface of the tool is less than 2mm, arranging an inner plate unit positioning device and an outer plate unit positioning device, and arranging a longitudinal and transverse measuring datum line and an elevation monitoring point outside the tool; on the frock, use peripheral measuring net as the benchmark in proper order from inside to outside the piecing together each piece, the major structure equipment order is: the inner wall plate unit → the bin dividing plate unit → the bidirectional curve plate unit → the torsion plate unit → the in-box connecting piece and the like, and after the assembly and the detection are qualified, the key parts are rigidly fastened by adopting temporary process partition plates, horse plates and the like;

fourth, segment welding technology: preferentially adopting automatic welding equipment to carry out welding according to the groove form, the welding process and the welding material determined by the welding process test; rigid temporary fasteners such as process partition plates, horse plates and the like are additionally arranged at the joint part of the segment, the butt joint part of the plate unit and the T-shaped joint part, so that the deformation resistance and welding shrinkage resistance of the structure are improved, and the dimensional precision of the structure is ensured to be favorable; according to the welding experience of the segment structure and the conventional steel-concrete combined tower and the symmetrical welding principle, a strict welding sequence is specified, so that the stress of the structure is approximately uniformly distributed in the welding process, and the segment is prevented from generating distortion and deformation integrally; in order to reduce the internal stress of structural welding and facilitate welding operation, the segments are structurally welded by a stage method (welding an inner bin structure welding seam formed by inner wall plates and then welding a box body structure welding seam formed by bin dividing plates and outer wall plates);

fifthly, connecting the attached steel bars of the wallboard and installing the accessories: after the segment is assembled and welded, mechanically connecting the attached transverse steel bars on the wall plates by using sleeves, assembling the anchoring ends of the transverse steel bars, and finally assembling the tie steel bars in the box; assembling and welding an elevator preweldment and a stop platform in an elevator shaft bin; installing structures such as an inclined ladder and a platform in the pedestrian ladder passage;

sixthly, a segment detection process: monitoring the datum line of the segment composition plate unit by using a total station by using a laid local detection network, and monitoring the transverse datum line and the segment top elevation of the composition plate unit by using a level gauge to ensure that the assembling precision is controllable; because the integral volume of the segment is large and the line shape is complex, laser three-dimensional scanning measurement equipment is introduced to integrally scan the exposed surface of the segment to obtain an actual manufactured physical model, and the physical model and a theoretical model are matched and compared by adopting a least square method to obtain a comprehensive deviation report of the segment;

the process of the assembly of the segments: according to the section structure and linear characteristics of the steel-concrete combined tower, vertical pre-assembly is adopted for segment entity pre-assembly operation; considering the construction safety and streamlined construction requirements, adopting a mode to perform pre-assembly; pre-assembly ensures the matching precision requirement of the connection interface through datum line alignment and elevation control; and arranging a bridge position alignment line at the interface, installing a bridge position positioning guide device (designed according to the line shape and the characteristics of the reinforced concrete combined tower), checking the interface and checking the alignment precision of the vertical steel bars.

Technical Field

The invention relates to a special-shaped curve structure steel-concrete combined tower segment which can realize variable cross section in the tower height direction and change in a curve manner and a manufacturing process, belonging to the field of manufacturing of super-large steel-concrete bridges.

Background

The application of the domestic steel-concrete combined tower technology is started from the fifth bridge of Yangtze river in Nanjing, and a new structural system of the bridge tower column is created. The steel-concrete combined tower has flexible structural design and is suitable for special structural modeling; the steel shell is used as a template for pouring concrete, so that the usage amount of the template of the concrete-steel-concrete combined tower is reduced; the steel consumption of the pure steel-concrete combined tower is large, and the cost is between that of a concrete tower and that of a steel-concrete combined tower; the advantages of steel and concrete are exerted, and the structural durability is facilitated. But the section of the steel-concrete combined tower section formed by the combined tower cannot realize special shape and vertical curve structure, and cannot meet the requirement that the tower height direction is variable in section and changes in a curve. Because the tower height direction is variable cross section and the manufacturing has the following technical difficulties in the curved change: the segment line shape is complex, and the difficulty of segment line shape manufacturing and precision control is high; the structure has a plurality of components and is mainly special-shaped, and the assembly and the dimensional accuracy of the segment structure are difficult to control; the section has the main structure of a medium-thick plate (16 mm to 24 mm), a plurality of structural connecting welding seams are provided, and the welding deformation has great influence on the structure; the segment structure is large in size and complex in linear shape, and assembly detection and finished product precision control of the segment structure are difficult.

Disclosure of Invention

The design purpose is as follows: the special-shaped curve structure steel-concrete combined tower segment which can realize variable cross section in the tower height direction and changes in a curve and the manufacturing process are designed.

The design scheme is as follows: in order to achieve the above design objectives. The invention adopts the following coping technical scheme on the scheme design:

1. the technical scheme of segment linear construction control is as follows: the method comprises the steps of lofting a complex curve part through a digital model, ensuring the curve line shape of the part by adopting an equipment and tooling method, manufacturing a curve plate unit on a special tool, manufacturing a splicing tooling according to the segment line shape, splicing segments, and enabling the integral line shape of the segments to meet the design requirement through the part, the plate unit and the segment staged line shape control.

2. The technical scheme for segment assembly precision control is as follows: the method is characterized in that a digital model is adopted for lofting parts, process allowance is added, high-precision numerical control flame cutting equipment is used for blanking, the plate unit assembly welding precision is strictly controlled, each part is accurately positioned on a special tool through a measuring net, and 2-4 mm welding shrinkage is reserved on the section size.

3. The technical scheme of segment welding deformation control is as follows: determining the welding groove form and the welding process through tests according to the thickness of the segment-forming plate and the joint form; according to the structural characteristics of the segments, the welding sequence and the welding principle of each welding line are specified; welding the parts with large welding quantity and weak structural rigidity after temporary support and reinforcement; and (5) correcting the deformation after welding.

4. The technical scheme for detecting the segment manufacturing precision is as follows: monitoring the segments through a measuring reference network and a high-range control point which are independent of a tool in the assembling process; detecting the segment finished product by adopting laser three-dimensional scanning measuring equipment, and comprehensively judging the accuracy deviation of the segment; and the connection relation between the segments is subjected to interface matching precision inspection through vertical entity pre-assembly.

The structure scheme is as follows: according to the structural characteristics of the special-shaped curve structure steel-concrete combined tower section, in combination with a steel structure manufacturing process and a construction technology, considering the characteristics of multiple component parts, dense welding lines, easy deformation and the like of the steel-concrete combined tower section, dividing the steel-concrete combined tower section into a plurality of plate units for manufacturing, and then assembling and welding the plate units into an integral section. The key process scheme for manufacturing the segment is as follows:

the technical scheme includes: the plane type part can be implemented according to the prior steel bridge construction technology; for the curve part, the precision and the line shape of the curve part are ensured through digital modeling lofting, intelligent numerical control blanking and marking and mechanical processing.

A manufacturing scheme of the plate unit is as follows: the manufacturing technology of the planar template unit is mature and is applied to the fifth bridge project of Yangtze river of Nanjing; for the manufacture of curve type plate units, different types of assembly tools are designed and manufactured according to the linear characteristics of each plate unit, and the control requirement of the manufacturing linear of the plate units is ensured; on the special tool, the plate units are assembled, welded, deformed and corrected, and finally the transverse and vertical reinforcing steel bars are assembled.

The segment assembling scheme comprises: according to the structural characteristics of the segments, carrying out scheme simulation through a BIM digital model, and formulating a reasonable assembling sequence of the segments; designing a special assembling tool according to the size and the line shape of the segment, and assembling the component units under the constraint of the tool; in the assembling process of each component unit, a total station and a level gauge are adopted for on-site monitoring, and the assembly accuracy of each component is ensured.

Fourth, segment welding scheme: determining the groove form and welding process of each joint through process tests according to the design requirements of the structural weld joint; in order to reduce the welding deformation, a temporary process clapboard and a support are adopted for rigid reinforcement; in order to avoid different deformation, according to the characteristic of symmetrical structure, the welding seam of the segment structure adopts a symmetrical welding principle; for construction operability, a step-by-step stage method is adopted for structural welding.

Fifthly, connecting the attached steel bars and installing accessories: and after the assembly welding of the sections is completed, connecting transverse steel bar joints between the plate units, tying steel bars in the installation box, and installing auxiliary structures such as a platform, a ladder stand and the like in the sections.

Sixthly, a detection scheme of a segment finished product: after the segment assembly welding is completed, the local deformation of the structure is subjected to thermal correction treatment, and the accuracy of the whole segment is detected by adopting laser three-dimensional scanning measuring equipment.

Segmentation-wise pre-assembly: according to the structural characteristics of the reinforced concrete combined tower sections, vertical entity pre-assembly is adopted, the installation state of bridge positions is simulated, and interface matching precision inspection is carried out.

The working principle is as follows: according to the key process scheme for manufacturing the steel-concrete combined tower segment, the key points and the principle of the manufacturing process of each procedure are as follows:

the processing method comprises the following key points of a curve part processing process: according to the design structure and the line shape, lofting the curve part by adopting a digital model mode; combining a structure processing technology, and additionally arranging a technology allowance on the curve part; acquiring a two-dimensional outline of the curve part by utilizing a metal plate unfolding function of three-dimensional software; generating a procedural file by using compiling software, and arranging a datum line by adopting numerical control cutting equipment for blanking and laser automatic scribing; machining the periphery of the part, opening a groove and the like by using mechanical equipment; and (3) performing curve forming on the part by adopting cold press forming equipment and thermal correction measures.

The manufacturing process of the curve plate unit is characterized in that: the curve-shaped outer wall plate unit is manufactured by adopting a curve tool, and the tool is designed into an adjustable movable tool so as to be convenient to adapt to the change of the structure size; after the curve outer wall plate is formed on a special tool, the curve outer wall plate is fixedly connected with the tool by rigid fastening, and the plate rib is tightly assembled with the curve outer wall plate; using CO with low linear energy₂The gas shielded welding process carries out plate unit welding, strictly controls welding sequence, symmetric welding, welding parameters and the like, and reduces deformation; after welding, removing the rigid fastener, detecting the plate unit, and finishing local deformation by adopting a thermal correction process until the precision of the plate unit meets the standard requirement; and sequentially penetrating the steel bars with processed end connecting threads into the steel bar holes of the transverse and vertical ribs of the plate unit, and fixing by adopting a temporary tool.

The key points of the segment assembling process are as follows: according to the segment structure characteristics, the assembling sequence of each plate unit is specified, the assembling scheme is simulated through a BIM digital model, the assembling sequence is continuously optimized, and each unit is ensured to be assembled smoothly; designing and manufacturing a special tool according to the size and the line shape of the segment, wherein the deviation of the flatness of the bottom surface of the tool is less than 2mm, arranging an inner plate unit positioning device and an outer plate unit positioning device, and arranging a longitudinal and transverse measuring datum line and an elevation monitoring point outside the tool; on the frock, use peripheral measuring net as the benchmark in proper order from inside to outside the piecing together each piece, the major structure equipment order is: the device comprises an inner wall plate unit → a bin dividing plate unit → a bidirectional curve plate unit → a torsion plate unit → a connecting piece in a box, and the like, wherein after the assembly and the detection are qualified, a temporary process partition plate, a horse board and the like are adopted to carry out rigid erection on key parts.

Fourth, segment welding process key points: preferentially adopting automatic welding equipment to carry out welding according to the groove form, the welding process and the welding material determined by the welding process test; rigid temporary fasteners such as process partition plates, horse plates and the like are additionally arranged at the joint part of the segment, the butt joint part of the plate unit and the T-shaped joint part, so that the deformation resistance and welding shrinkage resistance of the structure are improved, and the dimensional precision of the structure is ensured to be favorable; according to the welding experience of the segment structure and the conventional steel-concrete combined tower and the symmetrical welding principle, a strict welding sequence is specified, so that the stress of the structure is approximately uniformly distributed in the welding process, and the segment is prevented from generating distortion and deformation integrally; in order to reduce the internal stress of structural welding and facilitate welding operation, the segments are structurally welded by a stage method (welding an inner bin structure welding seam formed by inner wall plates and then welding a box body structure welding seam formed by bin dividing plates and outer wall plates).

The wallboard adheres to the reinforcing bar and connects and annex installation main points: after the segment is assembled and welded, mechanically connecting the attached transverse steel bars on the wall plates by using sleeves, assembling the anchoring ends of the transverse steel bars, and finally assembling the tie steel bars in the box; assembling and welding an elevator preweldment and a stop platform in an elevator shaft bin; the pedestrian ladder passage is provided with structures such as an inclined ladder and a platform.

Sixthly, detecting technological key points of a segment: monitoring the datum line of the segment composition plate unit by using a total station by using a laid local detection network, and monitoring the transverse datum line and the segment top elevation of the composition plate unit by using a level gauge to ensure that the assembling precision is controllable; due to the fact that the whole volume of the segment is large and the line shape is complex, laser three-dimensional scanning measuring equipment is introduced, the exposed surface of the segment is integrally swept, an actually manufactured physical model is obtained, the physical model and a theoretical model are matched and compared through a least square method, and a comprehensive deviation report of the segment is obtained.

The process of the assembly of the segments is more important: according to the section structure and linear characteristics of the steel-concrete combined tower, vertical pre-assembly is adopted for segment entity pre-assembly operation; considering the construction safety and streamlined construction requirements, adopting a mode to perform pre-assembly; pre-assembly ensures the matching precision requirement of the connection interface through datum line alignment and elevation control; and arranging a bridge position alignment line at the interface, installing a bridge position positioning guide device (designed according to the line shape and the characteristics of the reinforced concrete combined tower), checking the interface and checking the alignment precision of the vertical steel bars.

The technical scheme 1: the steel-concrete combined tower section with the special-shaped curve structure is characterized in that the section of the steel-concrete combined tower section is a special-shaped curve section and consists of R1m, R3m circular arc curves and transition straight lines, the tower height direction is variable in section and changes in a curve mode, and the tower column section consists of a box inner wall plate, a curve outer wall plate, a bin dividing plate, a box inner connecting piece and transverse and vertical reinforcing steel bars.

The technical scheme 2 is as follows: a manufacturing process of a special-shaped curved-structure reinforced concrete combined tower section,

the process for machining curve parts comprises the following steps: according to the design structure and the line shape, lofting the curve part by adopting a digital model mode; combining a structure processing technology, and additionally arranging a technology allowance on the curve part; acquiring a two-dimensional outline of the curve part by utilizing a metal plate unfolding function of three-dimensional software; generating a procedural file by using compiling software, and arranging a datum line by adopting numerical control cutting equipment for blanking and laser automatic scribing; machining the periphery of the part, opening a groove and the like by using mechanical equipment; performing curve molding on the part by adopting cold press molding equipment and thermal correction measures;

a manufacturing process of the curve plate unit comprises the following steps: the curve-shaped outer wall plate unit is manufactured by adopting a curve tool, and the tool is designed into an adjustable movable tool so as to be convenient to adapt to the change of the structure size; after the curve outer wall plate is formed on a special tool, the curve outer wall plate is fixedly connected with the tool by rigid fastening, and the plate rib is tightly assembled with the curve outer wall plate; the plate unit welding is carried out by adopting a CO2 gas shielded welding process with small linear energy, the welding sequence, the symmetrical welding, the welding parameters and the like are strictly controlled, and the deformation is reduced; after welding, removing the rigid fastener, detecting the plate unit, and finishing local deformation by adopting a thermal correction process until the precision of the plate unit meets the standard requirement; sequentially penetrating steel bars with processed end connecting threads into the steel bar holes of the transverse ribs and the vertical ribs of the plate units, and fixing by adopting a temporary tool;

the segment assembling process comprises the following steps: according to the segment structure characteristics, the assembling sequence of each plate unit is specified, the assembling scheme is simulated through a BIM digital model, the assembling sequence is continuously optimized, and each unit is ensured to be assembled smoothly; designing and manufacturing a special tool according to the size and the line shape of the segment, wherein the deviation of the flatness of the bottom surface of the tool is less than 2mm, arranging an inner plate unit positioning device and an outer plate unit positioning device, and arranging a longitudinal and transverse measuring datum line and an elevation monitoring point outside the tool; on the frock, use peripheral measuring net as the benchmark in proper order from inside to outside the piecing together each piece, the major structure equipment order is: the inner wall plate unit → the bin dividing plate unit → the bidirectional curve plate unit → the torsion plate unit → the in-box connecting piece and the like, and after the assembly and the detection are qualified, the key parts are rigidly fastened by adopting temporary process partition plates, horse plates and the like;

fourth, segment welding technology: preferentially adopting automatic welding equipment to carry out welding according to the groove form, the welding process and the welding material determined by the welding process test; rigid temporary fasteners such as process partition plates, horse plates and the like are additionally arranged at the joint part of the segment, the butt joint part of the plate unit and the T-shaped joint part, so that the deformation resistance and welding shrinkage resistance of the structure are improved, and the dimensional precision of the structure is ensured to be favorable; according to the welding experience of the segment structure and the conventional steel-concrete combined tower and the symmetrical welding principle, a strict welding sequence is specified, so that the stress of the structure is approximately uniformly distributed in the welding process, and the segment is prevented from generating distortion and deformation integrally; in order to reduce the internal stress of structural welding and facilitate welding operation, the segments are structurally welded by a stage method (welding an inner bin structure welding seam formed by inner wall plates and then welding a box body structure welding seam formed by bin dividing plates and outer wall plates);

fifthly, connecting the attached steel bars of the wallboard and installing the accessories: after the segment is assembled and welded, mechanically connecting the attached transverse steel bars on the wall plates by using sleeves, assembling the anchoring ends of the transverse steel bars, and finally assembling the tie steel bars in the box; assembling and welding an elevator preweldment and a stop platform in an elevator shaft bin; installing structures such as an inclined ladder and a platform in the pedestrian ladder passage;

sixthly, a segment detection process: monitoring the datum line of the segment composition plate unit by using a total station by using a laid local detection network, and monitoring the transverse datum line and the segment top elevation of the composition plate unit by using a level gauge to ensure that the assembling precision is controllable; because the integral volume of the segment is large and the line shape is complex, laser three-dimensional scanning measurement equipment is introduced to integrally scan the exposed surface of the segment to obtain an actual manufactured physical model, and the physical model and a theoretical model are matched and compared by adopting a least square method to obtain a comprehensive deviation report of the segment;

the process of the assembly of the segments: according to the section structure and linear characteristics of the steel-concrete combined tower, vertical pre-assembly is adopted for segment entity pre-assembly operation; considering the construction safety and streamlined construction requirements, adopting a mode to perform pre-assembly; pre-assembly ensures the matching precision requirement of the connection interface through datum line alignment and elevation control; and arranging a bridge position alignment line at the interface, installing a bridge position positioning guide device (designed according to the line shape and the characteristics of the reinforced concrete combined tower), checking the interface and checking the alignment precision of the vertical steel bars.

Compared with the background technology, the invention combines the BIM modeling technology with the parts processing, the plate unit manufacturing and the segment assembling technology, realizes the layout of a complex curve structure, can be used for the construction technology guidance of each stage, and is beneficial to the quality precision control; secondly, the assembly precision control of the special-shaped curve steel-concrete combined tower section is successfully realized by adopting the plate unit blocking, special tool constraint, reference net monitoring and reasonable assembly sequence, and the processing and manufacturing technical level of the steel-concrete combined tower is improved; thirdly, the welding deformation control of the steel-concrete combined tower section is realized by determining a proper welding process, specifying a reasonable welding sequence and adopting various rigid constraint mechanisms, and the method is a breakthrough of a linear control technology of a complex special-shaped curve structure; and fourthly, different detection methods such as process monitoring, finished product detection, entity pre-assembly inspection and the like are adopted, so that quality precision control in the construction process is realized, and the quality of the final product of the project is ensured.

Drawings

FIG. 1 is a schematic view of a section of a bridge reinforced concrete combined tower.

FIG. 2 is a schematic elevation of a manufacturing tool for a special-shaped curve steel-concrete combined tower section.

Fig. 3 is a schematic plan view of fig. 2.

FIG. 4 is a schematic view of a vertical assembling sequence of the special-shaped curve steel-concrete combined tower sections.

FIG. 5 is a vertical welding sequence diagram of the special-shaped curve steel-concrete combined tower section.

FIG. 6 is a schematic diagram of vertical pre-assembly of special-shaped curve reinforced concrete combined tower sections.

Detailed Description

Example 1: see figures 1-6. The steel-concrete combined tower section with the special-shaped curve structure is characterized in that the section of the steel-concrete combined tower section is a special-shaped curve section and consists of R1m, R3m circular arc curves and transition straight lines, the tower height direction is variable in section and changes in a curve mode, and the tower column section consists of a box inner wall plate 1, a curve outer wall plate 4, a bin dividing plate 5, a box inner connecting piece 2 and transverse and vertical reinforcing steel bars 3. The box inner wall plate 1 is a plane plate unit. The curve outer wall plate 4 is a bidirectional curved plate unit or a twisted plate unit. The bin distribution plate 5 is a plane plate unit.

The special-shaped curve steel-concrete combined tower segment structure is implemented according to the following process flow:

(1) construction preparation: reviewing a design drawing, optimizing a structure and welding an unreasonable part; formulating a manufacturing scheme of the steel-concrete combined tower section and reasonably dividing manufacturing units; determining a manufacturing process and control measures of the reinforced concrete combined tower section; and (5) compiling a construction drawing and related files of the steel-concrete combined tower segment.

(2) Designing and manufacturing a tool: according to the characteristics of the segment structure and the line shape of the reinforced concrete combined tower, a special assembly tool suitable for shape and line shape control is designed, longitudinal and transverse datum and elevation control points are established, and the tool precision is higher than the requirement of segment manufacturing precision.

(3) Segment assembling construction: firstly, all plate units forming the segment are manufactured, particularly the manufacturing precision of the curved dense rib plates needs to be strictly controlled, and the sizes and the line shapes of all the plate units participating in assembly meet the requirements; the method comprises the following steps of monitoring segment assembly by using a reference net on a special tool, sequentially positioning according to a specified sequence, and temporarily fixing by adopting temporary supports, rigid horse boards and the like to ensure construction safety and stable structure assembly size; monitoring the assembling process, adjusting assembling deviation in time, and adding welding process allowance by considering later welding shrinkage factors; and after the assembly size, the line shape and the process allowance are monitored to be qualified, the welding operation can be carried out.

(4) Segment welding construction: after the segments are assembled to be qualified, segment welding operation is carried out according to the specified welding sequence and welding process; segment assembling and welding are carried out in two stages: assembling and welding the inner wall plate of the box at the first stage, and assembling and welding the outer wall plate of the box and the inner structure of the box at the second stage; and (5) after welding, detecting and correcting local welding deformation.

(5) Segment detection and pre-assembly inspection: the method comprises the steps that high-precision three-dimensional scanning measurement equipment is used for overall scanning of outer wall plates of the periphery of a steel-concrete combined tower section, data collection can be completed through 4 stations of the periphery, data processing is conducted through software, collected data are subjected to deviation comparison with a theoretical model, and a deviation analysis report is formed; according to the segment structure, a pre-assembly tool is erected, the fact that the tool is stable in support and meets the requirements for precision is guaranteed, the first segment is located on the tool through a measuring reference, after the first segment is detected to be qualified, the last segment is located through the first segment reference, the structure matching precision of the adjacent segments is checked, unqualified parts are corrected, and the positioning guide device for the bridge site and the monitoring reference line are installed and laid.

The manufacturing process of the special-shaped curve structure steel-concrete combined tower segment is suitable for manufacturing special-shaped curve vertical type tailor-welded steel-concrete combined towers and steel tower segments; the method can accurately control the structural size of the segment through a tool, effectively ensure the complex linear precision through a staged linear control measure, ensure the structural precision and the weld quality by adopting a welding process measure, and carry out deviation analysis on the structural precision by adopting various measures such as process detection, finished product detection, entity simulation inspection and the like; in the implementation of a supporting project, the comprehensive quality of constructors is improved, the control of the quality precision of working procedures is enhanced and the quality of the sections of the reinforced concrete combined tower is ensured by continuously refining a process method.

The manufacturing process of the special-shaped curve structure steel-concrete combined tower segment has the advantages of effective control of the manufacturing quality of the steel-concrete combined tower segment, strong process performability, mature and stable method, capability of solving the problem that the steel-concrete combined tower and the steel tower segment need to be manufactured vertically, new breakthrough of the manufacturing technology of the domestic bridge steel-concrete combined tower, worth of reference of similar projects and popularization value.

It is to be understood that: although the above embodiments have described the design idea of the present invention in more detail, these descriptions are only simple descriptions of the design idea of the present invention, and are not limitations of the design idea of the present invention, and any combination, addition, or modification without departing from the design idea of the present invention falls within the scope of the present invention.