CN115748984A - Reverse operation construction method for large-section fusiform double-inclined column - Google Patents
Reverse operation construction method for large-section fusiform double-inclined column Download PDFInfo
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Abstract
The invention relates to the technical field of construction of building steel structures, and discloses a reverse operation construction method for a large-section fusiform double-inclined column, wherein the fusiform inclined column is divided into two sections which are transported to the site from a manufacturer, the two sections of the fusiform inclined column are respectively a fusiform inclined column upper section column and a fusiform inclined column lower section column, the fusiform inclined column is positioned on the ground for assembly, a gas welding flame heating method is adopted for the welding preheating treatment of the fusiform inclined column, the preheating treatment is carried out in a preheating area which is 150-200mm away from two sides of a welding seam area, and the welding seam part is ground flat and cleaned up after being welded for 24 hours for nondestructive detection. According to the invention, through the reverse construction method of the heavy shuttle-shaped batter post with the large cross section, the phenomenon that the batter post occupies the field after the batter post construction is finished and the ground assembly of the position of the batter post opposite to the roof truss is influenced can be effectively avoided, the roof truss can be conveniently assembled on the ground to complete a whole, the stability of the truss is ensured, and the hoisting work of the roof truss after being lifted can be reduced.
Description
Technical Field
The invention relates to the technical field of construction of building steel structures, in particular to a reverse operation construction method of a large-section fusiform double-inclined column.
Background
Along with the continuous update of the steel structure building concept, the aesthetic requirements and the function diversification of the building cause the change of the construction technology, the change not only stops the simple update on the construction means, for example, the steel structure roof with large span and complex space of large-scale public buildings such as airport buildings, exhibition centers, stadiums, exhibition halls and the like, the supporting system of the steel structure roof also changes variously, the structural form is novel and changeable, the inclined column support is widely applied to the public buildings such as large-scale high-speed railway station houses, exhibition centers and the like due to the elegant shape and simple form of the inclined column support at present. At present, full framing is erected during batter post support construction, so that the construction site is occupied, the construction period is long, the workload is large, the cost is high, and the construction sequence of a roof truss is influenced, so that a large-section fusiform double-batter post reverse operation construction method which is short in construction time, high in installation precision, safe and rapid in construction and mature in process is urgently needed.
Disclosure of Invention
The invention aims to provide a reverse operation construction method for a large-section fusiform double-inclined column, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a reverse operation construction method for a large-section fusiform double-inclined column comprises the following steps:
s1, quality certificates of shuttle-shaped batter posts, V-shaped steel castings and special-shaped steel castings of the steel structure are checked and sent to the site along with a delivery truck;
s2, laying main reinforcements of the inclined column pier at the designed beam column node, after the structural construction is completed, constructing according to the sequence of reinforcement binding of the inclined column pier, installation of an anti-seismic support embedded part of a V-shaped cast steel part, concrete pouring and installation of the anti-seismic support, installing the V-shaped cast steel part on the anti-seismic support, and taking the V-shaped cast steel part as a connecting point of a lower section column of the shuttle-shaped inclined column;
s3, the roof truss is assembled and hoisted on site by using a truck crane, the mounting precision and the construction safety of the roof truss are controlled by a theodolite and a total station in the mounting and construction process, the roof truss and the special-shaped cast steel are hoisted to an appointed position according to the construction process, the roof truss and the special-shaped cast steel are integrally hoisted to a design elevation by using a hydraulic oil cylinder hoisting technology, and the special-shaped cast steel is used as a connecting point of upper studs of the shuttle-shaped oblique posts;
s4, the shuttle-shaped batter post is divided into two sections which are transported to the site from a manufacturer, the two sections of the shuttle-shaped batter post are respectively a shuttle-shaped batter post upper sectional post and a shuttle-shaped batter post lower sectional post, and the shuttle-shaped batter post is positioned on the ground for splicing;
s5, marking the position of the fusiform oblique column on the assembling platform by adopting a level gauge and a total station, arranging I-shaped steel according to the butt joint shape of the fusiform oblique column, ensuring that the central line of the fusiform oblique column is positioned on the same horizontal plane, fixing by spot welding after assembling, retesting the plane position and the central line elevation of the component, finely adjusting the position with larger deviation by adopting a jack, and in the welding process, symmetrically welding by adopting double welders to eliminate the component deviation caused by thermal stress in the welding process;
s6, before installing the lifting lug, calculating the weight distribution of the component according to a deepening drawing of the shuttle-shaped inclined column to determine the positions of the upper lifting lug and the lower lifting lug, then installing and welding the upper lifting lug and the lower lifting lug, wherein the upper lifting lug and the lower lifting lug are adopted for installing the shuttle-shaped inclined column, the specification is 30 multiplied by 150mm, and the bearing capacity of the single upper lifting lug and the single lower lifting lug is calculated as follows:
go up lug and lower lug and the full penetration weld bearing capacity of fusiformis batter post: f1=30 × 150 × 300=1350kn;
the anti shear capacity of the pore wall of going up lug and lower lug does: f2=30 × 30 × 180 × 2=324kn;
the pore wall pressure-resistant bearing capacity of the upper lifting lug and the lower lifting lug is as follows: f3=30/2 × 3.14 × 30 × 150= 2120n;
therefore, the lowest bearing capacity of a single upper lifting lug and a single lower lifting lug is 212kN and about 21.2t, the bearing capacity of the two lifting lugs is about 42.4t, the maximum weight of the shuttle-shaped inclined column is 28.4t, the bearing capacity of the upper lifting lug and the bearing capacity of the lower lifting lug meet the requirements, the welding seams of the upper lifting lug and the lower lifting lug are full penetration of double-sided grooves, welding is carried out according to the standard of a first-level welding seam, the welding seam flaw detection is carried out, and the shuttle-shaped inclined column can be hoisted after the flaw detection is qualified;
s7, calculating Q main + Q auxiliary K to be more than or equal to Q1+ Q2 aiming at synchronous lifting of two cranes, taking the self weight Q1=28.4t of the heaviest shuttle-shaped inclined column, considering the weight Q2=2t of a rigging, taking K as the reduction coefficient K =0.8 of the crane, namely Q main + Q auxiliary to be more than or equal to 38t, comprehensively considering the crane lifting calculation reference crane performance parameter table, and selecting an 80t truck crane to lift the upper section column of the shuttle-shaped inclined column to be butted with a special-shaped cast steel piece and a 50t truck crane to lift the lower section column of the shuttle-shaped inclined column;
s8, simultaneously hoisting an 80t truck crane and a 50t truck crane for a shuttle-shaped batter post, hoisting a special-shaped steel casting on a shuttle-shaped batter post upper section column butt joint roof truss by the 80t truck crane, hoisting a V-shaped steel casting installed at a shuttle-shaped batter post lower section column butt joint batter post pier position by the 50t truck crane, simultaneously hoisting two truck cranes to hoist the shuttle-shaped batter post to the horizontal height of the V-shaped steel casting, keeping the 50t truck crane still, lifting the shuttle-shaped batter post upper section column to the special-shaped steel casting interface position of the roof truss by the 80t truck crane, butting the shuttle-shaped batter post upper section column and the special-shaped steel casting and simply fixing the special-shaped batter post, butting the shuttle-shaped batter post lower section column and the V-shaped steel casting, and finely adjusting the upper and lower ports of the shuttle-shaped batter post by a total station after the two ports are butted until the upper and lower ports are installed to the designed elevation;
s9, data are collected at the middle point and four corners of the port butt joint of the upper section column of the shuttle-shaped batter post and the lower section column of the shuttle-shaped batter post, measured deviation adjustment is carried out according to comparison actual measurement values of design values of the shuttle-shaped batter post, the installation is completed, measuring control points are arranged at the outer sides of the butt joint of the upper section column of the shuttle-shaped batter post and the lower section column of the shuttle-shaped batter post, namely the northeast, the southeast, the southwest and the northwest, and each measuring control point is measured from the bottom measuring control point.
As a preferred embodiment of the invention, the welding preheating treatment of the shuttle-shaped inclined column adopts a gas welding flame heating method, the welding is carried out in a preheating area 150-200mm away from both sides of a welding seam area, a welder retests the temperature of a component and the welding seam by using a portable infrared thermometer until the temperature of the welding seam is stabilized between 80-100 ℃ of the welding preheating temperature, a temporary operating platform is erected by using an existing coil buckle frame on the spot, fireproof cloth covers the outer side of the temporary operating platform, and the operating platform is arranged 600-800 mm away from the welding seam on the spot.
As a preferred embodiment of the invention, the weld joint is ground and cleaned 24 hours after welding to carry out nondestructive testing on the weld joint, the ultrasonic testing is carried out in the first class of GB7233-87 standard, the magnetic powder testing is carried out in the first class of GB9444-88 standard, and the weld joint is welded after reaching the standard through the nondestructive testing.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the construction method, the large-section heavy shuttle-shaped inclined column is constructed in a reverse method, the situation that the inclined column occupies a field after the construction of the inclined column is finished and the ground assembly of the position, which is right opposite to the roof truss, of the inclined column is influenced can be effectively avoided, the roof truss can be conveniently assembled on the ground into a whole, the stability of the truss is guaranteed, and the hoisting work of the roof truss after being lifted can be reduced.
2. According to the invention, through the reverse construction method of the large-section heavy shuttle-shaped oblique column, the quantity of supporting materials is reduced, the risk coefficient of high-altitude supporting is reduced, the difficult problem of hoisting the shuttle-shaped oblique column in a narrow space is effectively solved, the construction period is greatly shortened, the cost is saved, and the structure construction precision is ensured.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a construction flow chart of a reverse operation construction method of a large-section fusiform double-inclined column of the invention;
FIG. 2 is a perspective view of a shuttle-shaped oblique column platform crane of the inverse operation construction method of the large-section shuttle-shaped double-oblique column of the present invention;
FIG. 3 is a view of the spindle-shaped oblique column butt joint assembly of the inverse operation construction method of the large-section spindle-shaped double-oblique column of the present invention;
FIG. 4 is a schematic view of installation of a V-shaped steel casting and an anti-seismic support thereof in the reverse operation construction method of the large-section fusiform double-inclined column.
In the figure: 1. a fusiform batter post; 2. a V-shaped steel casting; 21. an anti-seismic support; 22. embedding the anti-seismic support; 23. an oblique column pier; 3. special-shaped steel castings; 4. a roof truss; 5. a spindle-shaped inclined column upper section column; 6. a shuttle-shaped inclined column lower section column; 7. an upper lifting lug; 8. a lower lifting lug; 9. 80t truck crane; 10. a 50t truck crane; 11. and H-shaped steel.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Example 1
Referring to fig. 1-4, the present invention provides a technical solution: a reverse operation construction method for a large-section fusiform double-inclined column comprises the following steps:
s1, steel structure shuttle-shaped batter posts 1, V-shaped steel castings 2 and special-shaped steel castings 3 are qualified through quality inspection of factories when leaving factories, quality pass certificates are issued and sent to the sites along with trucks, and the steel structure shuttle-shaped batter posts 1, the V-shaped steel castings 2 and the special-shaped steel castings 3 need to be inspected on the site in appearance and size, internal structures, pipe diameters and wall thicknesses, primer film thickness and nondestructive flaw detection on welding positions after entering the sites, so that the materials can be used after no quality defects exist;
s2, constructing the concrete structure to a designed elevation, laying main ribs of an oblique column pier 23 at a designed beam column node, constructing according to the sequence of steel bar binding of the oblique column pier 23, installation of a V-shaped steel casting anti-seismic support embedded part 22, concrete pouring and installation of an anti-seismic support 21 after the structural construction is finished, installing a V-shaped steel casting 2 on the anti-seismic support 21, and taking the V-shaped steel casting 2 as a connecting point of a lower section column 6 of the fusiform oblique column;
s3, the roof truss 4 is assembled and hoisted on site by using a truck crane, the mounting precision and the construction safety of the roof truss 4 are controlled by a theodolite and a total station in the mounting construction process, the roof truss 4 and the special-shaped steel castings 3 are hoisted to specified positions according to the construction process, the roof truss 4 and the special-shaped steel castings 3 are integrally hoisted to a designed elevation by using a hydraulic oil cylinder hoisting technology, and the special-shaped steel castings 3 are used as connection points of upper sectional columns 5 of the shuttle-shaped inclined columns;
s4, the shuttle-shaped batter post 1 is 28.4t in maximum weight, 19m in length and 900/1300 x 45mm in specification and is transported to the site from a factory in two sections, the two sections of the shuttle-shaped batter post 1 are respectively a shuttle-shaped batter post upper sectional post 5 and a shuttle-shaped batter post lower sectional post 6, a full penetration butt joint welding seam is adopted between the shuttle-shaped batter post upper sectional post 5 and the shuttle-shaped batter post lower sectional post 6, the quality of the welding seam is one grade, the welding thickness between the shuttle-shaped batter post upper sectional post 5 and the shuttle-shaped batter post lower sectional post 6 is 100mm, the welding thickness is limited by narrow and small site, space limited conditions and large difficulty, and in order to ensure the welding quality and the construction progress, the shuttle-shaped batter post 1 is assembled on the ground on the site;
s5, transporting an upper joint post 5 and a lower joint post 6 of the shuttle-shaped batter post to be installed to the installation position of the shuttle-shaped batter post 1 in a reverse mode by adopting a flat car, marking the position of the shuttle-shaped batter post 1 on an assembling platform by adopting a level gauge and a total station, arranging I-shaped steel 11 according to the butt joint shape of the shuttle-shaped batter post 1, ensuring that the central line of the shuttle-shaped batter post is positioned on the same horizontal plane, fixing the center line by spot welding after assembling, retesting the plane position and the elevation of the central line of the component, finely adjusting the position with larger deviation by adopting a jack, and in the welding process, symmetrically welding by adopting double welders to eliminate the component deviation caused by thermal stress in the welding process;
s6, before installing the lifting lug, calculating the weight distribution of the component according to a deepening drawing of the shuttle-shaped inclined column to determine the positions of the upper lifting lug 7 and the lower lifting lug 8, then installing and welding the upper lifting lug 7 and the lower lifting lug 8, wherein the upper lifting lug 7 and the lower lifting lug 8 are adopted for installing the shuttle-shaped inclined column 1, the specification is 30 multiplied by 150mm, and the bearing capacity of the single upper lifting lug 7 and the single lower lifting lug 8 is calculated as follows:
go up lug 7 and lower lug 8 and 1 full penetration weld bearing capacity of fusiformis batter post: f1=30 × 150 × 300=1350kn;
the hole wall shear-resistant bearing capacity of the upper lifting lug 7 and the lower lifting lug 8 is as follows: f2=30 × 30 × 180 × 2=324kn;
the pore wall pressure-resistant bearing capacity of the upper lifting lug 7 and the lower lifting lug 8 is as follows: f3=30/2 × 3.14 × 30 × 150= 2120;
therefore, the lowest bearing capacity of the single upper lifting lug 7 and the single lower lifting lug 8 is 212kN and about 21.2t, the bearing capacity of the two lifting lugs is about 42.4t, the heaviest shuttle-shaped oblique column 1 is 28.4t, the bearing capacity of the upper lifting lug 7 and the bearing capacity of the lower lifting lug 8 both meet the requirements, the welding seams of the upper lifting lug 7 and the lower lifting lug 8 are double-face groove full penetration, welding is carried out according to the standard of a first-level welding seam, and the welding seam flaw detection is carried out, and the shuttle-shaped oblique column can be hoisted after the flaw detection is qualified;
s7, calculating (Q main + Q auxiliary) K is more than or equal to Q1+ Q2 aiming at synchronous lifting of two cranes, taking the dead weight Q1=28.4t of the heaviest shuttle-shaped batter post, considering the weight Q2=2t of the rigging, taking K as the reduction coefficient K =0.8 of the crane, namely Q main + Q auxiliary is more than or equal to 38t, comprehensively considering the crane lifting calculation reference crane performance parameter table, and selecting an 80t truck crane 9 to lift the upper section column 5 of the shuttle-shaped batter post to be in butt joint with the special-shaped cast steel part 3 and a 50t truck crane 10 to lift the lower section column 6 of the shuttle-shaped batter post;
s8, simultaneously hoisting an 80t truck crane 9 and a 50t truck crane 10 for the shuttle-shaped batter post 1, hoisting an upper joint post 5 of the shuttle-shaped batter post by the 80t truck crane 9 to be butted with a special-shaped steel casting 3 on a roof truss 4, hoisting a V-shaped steel casting 2 installed at a lower joint post 6 of the shuttle-shaped batter post to be butted with a batter post pier 23 by the 50t truck crane 10, simultaneously hoisting the shuttle-shaped batter post 1 by the two truck cranes to be hoisted to the horizontal height of the V-shaped steel casting 2, keeping the 50t truck crane 10 static, hoisting the upper joint post 5 of the shuttle-shaped batter post to be hoisted to the interface position of the special-shaped steel casting 3 of the roof truss 4 by the 80t truck crane 9, butting the upper joint post 5 of the shuttle-shaped batter post with the special-shaped steel casting 3 and simply fixing, butting the lower joint post 6 of the shuttle-shaped batter post with the V-shaped steel casting 2, and finely adjusting the measurement elevation of the upper and the lower joint post of the shuttle-shaped batter post 1 by a total station until the upper joint port and the upper and the lower joint post are installed to the designed position;
s9, data are collected at the middle point and four corners of the port butt joint of the shuttle-shaped batter post upper section post 5 and the shuttle-shaped batter post lower section post 6, measured deviation adjustment is carried out according to comparison of actual measured values of design values of the shuttle-shaped batter post 1, installation is completed, measuring control points are arranged at the positions, right north east, right south west and right north outside the butt joint of the shuttle-shaped batter post upper section post 5 and the shuttle-shaped batter post lower section post 6, each measuring control point is measured from a bottom layer measuring control point, and batter post installation precision measurement is arranged in the morning and evening with good vision and small temperature difference.
In the embodiment 2, a welding preheating treatment of the shuttle-shaped inclined column 1 adopts a gas welding flame heating method, baking is carried out in a preheating area 150-200mm away from two sides of a welding seam area, a welder retests the temperature of a component and the welding seam by using a portable infrared thermometer until the temperature of the welding seam is stabilized between 80-100 ℃, a temporary operating platform is erected by using an existing coil buckle frame on the spot, fireproof cloth covers the temporary operating platform, the operating platform is arranged 600-800 mm away from the welding seam on the spot, two welders are adopted to simultaneously operate at two ends of the welding seam of a steel casting during welding of the welding seam, so that the welding speed can be increased during welding, the positioning deviation caused by welding deformation can be reduced, multiple layers of welding are required during welding, wide-path welding is forbidden, multiple times of welding are required because the welding cannot be completed in one-time welding, the welding seam is tightly wrapped by heat-preserving cotton after the welding is completed in one day, the welding seam is slowly cooled, the preheating temperature is correspondingly increased when the welding is carried out again on the second day, the welding seam is ground and cleaned after 24 hours, the welding seam is subjected to GB 7288-class I ultrasonic testing, and GB94 testing is carried out.
When the inverse operation construction method of the large-section fusiform double-inclined column is used, the inverse operation construction method of the large-section fusiform double-inclined column needs to be explained, and the inverse operation construction method comprises the following steps of 1, fusiform inclined columns; 2. a V-shaped steel casting; 21. an anti-seismic support; 22. embedding the anti-seismic support; 23. an oblique column pier; 3. special-shaped steel castings; 4. a roof truss; 5. a spindle-shaped inclined column upper section column; 6. a shuttle-shaped inclined column lower section column; 7. an upper lifting lug; 8. a lower lifting lug; 9. 80t truck crane; 10. a 50t truck crane; 11. the i-steel, the components are all common standard parts or parts known to those skilled in the art, and the structure and principle thereof are known to those skilled in the art through technical manuals or through routine experimental methods.
While there have been shown and described what are at present considered to be the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (3)
1. A reverse operation construction method for a large-section fusiform double-inclined column is characterized by comprising the following steps: the method comprises the following steps:
s1, quality certificates of a steel structure shuttle-shaped inclined column (1), a V-shaped steel casting (2) and a special-shaped steel casting (3) are checked and sent to the site along with a delivery truck;
s2, laying main reinforcements of an oblique column pier (23) at a designed beam column node, constructing according to the sequence of reinforcement binding of the oblique column pier (23), installation of an anti-seismic support embedded part (22) of the V-shaped cast steel part (2), concrete pouring and installation of the anti-seismic support (21) after structural construction is finished, installing the V-shaped cast steel part (2) on the anti-seismic support (21), and taking the V-shaped cast steel part (2) as a connection point of a lower section column (6) of the fusiform oblique column;
s3, the roof truss (4) is assembled and hoisted on site by using a truck crane, the mounting precision and the construction safety of the roof truss (4) are controlled by a theodolite and a total station in the mounting and construction process, the roof truss (4) and the special-shaped steel casting (3) are hoisted to an appointed position according to the construction process, the roof truss (4) and the special-shaped steel casting (3) are integrally hoisted to a designed elevation by using a hydraulic oil cylinder hoisting technology, and the special-shaped steel casting (3) is used as a connection point of a shuttle-shaped inclined column upper section column (5);
s4, the shuttle-shaped batter post (1) is divided into two sections and transported to the site from a manufacturer, the two sections of the shuttle-shaped batter post (1) are respectively a shuttle-shaped batter post upper section post (5) and a shuttle-shaped batter post lower section post (6), and the shuttle-shaped batter post (1) is positioned on the ground for splicing;
s5, marking the position of the fusiform oblique column (1) on the assembly platform by adopting a level gauge and a total station, arranging I-shaped steel (11) according to the butt joint shape of the fusiform oblique column (1), ensuring that the central line of the fusiform oblique column (1) is positioned on the same horizontal plane, fixing by spot welding after assembly, retesting the plane position and the central line elevation of the component, finely adjusting the position with larger deviation by adopting a jack, and in the welding process, symmetrically welding by adopting a double welder to eliminate the component deviation caused by thermal stress in the welding process;
s6, before installing the lifting lugs, calculating the weight distribution of the component according to a deepening drawing of the shuttle-shaped inclined column to determine the positions of the upper lifting lug (7) and the lower lifting lug (8), then installing and welding the upper lifting lug (7) and the lower lifting lug (8), wherein the upper lifting lug (7) and the lower lifting lug (8) are adopted for installing the shuttle-shaped inclined column (1), the specification is 30 x 150mm, and the bearing capacity of the single upper lifting lug (7) and the single lower lifting lug (8) is calculated as follows:
go up lug (7) and lower lug (8) and fusiformis batter post (1) full penetration weld bearing capacity: f1=30 × 150 × 300=1350kn;
the hole wall shear-resistant bearing capacity of the upper lifting lug (7) and the lower lifting lug (8) is as follows: f2=30 × 30 × 180 × 2=324kn;
the pore wall pressure-resistant bearing capacity of the upper lifting lug (7) and the lower lifting lug (8) is as follows: f3=30/2 × 3.14 × 30 × 150= 2120n;
therefore, the lowest bearing capacity of a single upper lifting lug (7) and a single lower lifting lug (8) is 212kN and about 21.2t, the bearing capacity of the two lifting lugs is about 42.4t, the shuttle-shaped inclined column (1) is 28.4t heaviest, the bearing capacity of the upper lifting lug (7) and the bearing capacity of the lower lifting lug (8) meet the requirements, the welding seams of the upper lifting lug (7) and the lower lifting lug (8) are full penetration of double-sided grooves, welding is carried out according to the standard of a primary welding seam, flaw detection of the welding seam is carried out, and the shuttle-shaped inclined column can be hoisted after the flaw detection is qualified;
s7, selecting an 80t truck crane (9) to hoist the upper section column (5) of the shuttle-shaped inclined column to be in butt joint with the special-shaped steel casting (3) and a 50t truck crane (10) to hoist the lower section column (6) of the shuttle-shaped inclined column;
s8, simultaneously hoisting an 80t truck crane (9) and a 50t truck crane (10) for the shuttle-shaped batter post (1), hoisting a shuttle-shaped batter post upper section post (5) by the 80t truck crane (9) to be in butt joint with a special-shaped steel casting (3) on a roof truss (4), hoisting a shuttle-shaped batter post lower section post (6) by the 50t truck crane (10) to be in butt joint with a V-shaped steel casting (2) arranged at a batter post pier (23), simultaneously hoisting two truck cranes to hoist the shuttle-shaped batter post (1) to be in a horizontal height of the V-shaped steel casting (2), keeping the 50t truck crane (10) stationary, lifting a shuttle-shaped batter post upper section post (5) to be in a special-shaped steel casting (3) interface position of the roof truss (4) by the 80t truck crane (9), butting and fixing the shuttle-shaped batter post upper section post (5) and the steel casting (3) simply, well butting and carrying out fine adjustment on elevation of the shuttle-shaped batter post upper section post (6) and the special-shaped steel casting (2) until two ends of the special-shaped batter post (1) are in butt joint, and the whole station is designed and the whole station is finished;
s9, data are collected at the middle point and four corners of the port butt joint port of the shuttle-shaped batter post upper section post (5) and the port butt joint port of the shuttle-shaped batter post lower section post (6), measurement deviation adjustment is carried out according to the design value comparison measured value of the shuttle-shaped batter post (1), installation is completed, measurement control points are arranged at the outer sides of the butt joint port of the shuttle-shaped batter post upper section post (5) and the shuttle-shaped batter post lower section post (6) and are located at the northeast, the southeast, the southwest and the northwest, and each measurement control point is led from the bottom layer measurement control point.
2. The reverse operation construction method of the large-section fusiform double-inclined column as claimed in claim 1, wherein: and in the step S9, the welding preheating treatment of the shuttle-shaped inclined column (1) adopts a gas welding flame heating method, the welding preheating treatment is carried out in a preheating area 150-200mm away from two sides of a welding seam area, a welder retests the temperature of the component and the welding seam by using a portable infrared thermometer until the temperature of the welding seam is stabilized at the welding preheating temperature of 80-100 ℃, a temporary operation platform is erected by using an existing coil buckle frame on the spot, fireproof cloth covers the outer side of the temporary operation platform, and the operation platform is arranged at a position 600-800 mm away from the welding seam on the spot.
3. The reverse operation construction method of the large-section fusiform double-inclined column as claimed in claim 2, wherein: and the weld joint is ground flat and cleaned up after being welded for 24 hours, nondestructive testing is carried out on the weld joint, the GB7233-87 standard first grade is executed in ultrasonic testing, the GB9444-88 standard first grade is executed in magnetic powder testing, and the weld joint is qualified after reaching the standard through nondestructive testing.
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