CN107524297B - High-altitude positioning construction method for frustum-shaped roof truss - Google Patents
High-altitude positioning construction method for frustum-shaped roof truss Download PDFInfo
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- CN107524297B CN107524297B CN201610454427.8A CN201610454427A CN107524297B CN 107524297 B CN107524297 B CN 107524297B CN 201610454427 A CN201610454427 A CN 201610454427A CN 107524297 B CN107524297 B CN 107524297B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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Abstract
The invention relates to a frustum-shaped roof truss, in particular to a high-altitude construction method of the frustum-shaped roof truss. The method includes the steps of building a bearing support and an operation platform, finding out the circle center of the bearing support on the operation platform of the bearing support, arranging a positioning steel plate and a positioning hole, adjusting a suspension lead cone and the reference point of the circle center of the ground through a cable rope, adopting a steel ring beam sectional hoisting technology, enabling the central line of a connecting plate on an adjusting ring beam to be coincident with the axis led up from the ground, adjusting and positioning the circle center distance according to arcs led out from the operation platform and a column top, adjusting the elevation by matching a jack with a steel tape, installing an oblique beam in a symmetrical mode, enabling the structure to generate load capacity after installation, and dismantling the bearing support and the operation platform. The invention has strong operability, safety, reliability, high positioning precision and remarkable economic benefit.
Description
Technical Field
The invention relates to a frustum-shaped roof truss, in particular to a high-altitude construction method of the frustum-shaped roof truss.
Background
The application of the existing hollow frustum-shaped structure in industrial buildings is very wide, the hollow frustum-shaped structure relates to the industries such as electric power, cement, smelting and the like, the positioning, installation and construction difficulty of a large-span and high-altitude roof truss is high, and the positioning difficulty at high altitude is very high. At present, in order to solve the problem, methods such as erecting full framing scaffolds, integral hoisting and the like are commonly adopted in the industry, but higher measure cost is generated.
Disclosure of Invention
The invention aims to solve the defects and provides a high-altitude positioning construction method for a frustum-shaped roof truss. The invention has strong operability, safety, reliability, high positioning precision and remarkable economic benefit.
A high-altitude positioning construction method for a frustum-shaped roof truss comprises the following steps:
the method comprises the following steps: assembling standard sections of the bearing support with corresponding specifications and quantity to form the bearing support according to the load weight and elevation of the roof truss by taking the ground circle center datum point as the central position of the bearing support;
step two: the four corners of the assembled bearing support are adjusted and fixed by a guy rope, and the verticality is ensured by the measurement of a theodolite;
step three: hoisting the operation platform on the bearing support integrally by using a truck crane, and fastening by using bolts;
step four: finding out the circle center of the bearing support on the operation platform by utilizing the diagonal intersection point of the bearing support, and arranging a positioning steel plate and a positioning hole;
step five: according to the central point of the mounting support of the steel oblique beam of the conical shell roof, two vertical and horizontal crossed axes are discharged and marked; then paying off by using two steel wires according to the marks, and cooperatively paying off a cross line by using a steel tape and a tension meter, and paying off a plumb line from a circle center positioning plate, wherein the intersection point of the two steel wires is intersected with a plumb line at the top end of the bracket, and the distance between the plumb line and the intersection point is not more than 25 mm;
step six: symmetrically guiding a vertical axis to the top of an operation platform by using a theodolite, releasing a positioning arc line on the operation platform by using a central point and a steel tape at a central distance, marking the intersection point of the arc line and the axis, and welding a positioning support outside the mark;
step seven: leading the intersection point of the horizontal arc line and the axis to the top of the support, and welding a positioning baffle at the intersection point to prevent the hoisting ring beam from sliding out of the datum line when in place;
step eight: the sectional hoisting ring beam is placed on the positioning support and is tightly attached to the positioning baffle, the central line of a connecting plate on the adjusting ring beam is superposed with the axis led up from the ground, the elevation of the sectional hoisting ring beam is adjusted by a jack matched with a steel tape, the jack is locked after the sectional hoisting ring beam is adjusted in position, the inclined base plate is wedged tightly, the sectional hoisting ring beam is fixed by spot welding, and the stand columns are welded on the two sides of the ring beam on the platform to fix the ring beam;
step nine: integrally welding the ring beam according to a reserved strain gap, hoisting the oblique beam after checking that the oblique beam is correct, and hoisting the oblique beam according to axial symmetry;
step ten: after the oblique steel beams and the support connecting rod pieces are installed and welded, and the deviation is allowed after the oblique steel beams and the support connecting rod pieces are detected to be in accordance with the standard, the bearing support can be detached for unloading, the unloading is carried out symmetrically at the same time, the oblique base plate is cut off, the jack is loosened, the steel platform is completely suspended, the elevation of the ring beam is measured by a level gauge before and after the unloading, and the elevation difference of the ring beam is in accordance with the design requirement;
step eleven: after the roof is unloaded, the bearing support is dismantled, the BIM technology is applied to carry out stress analysis on the load capacity of the roof truss structure, construction simulation is carried out, construction is carried out after feasibility is ensured, a steel roof ring beam is used as a hanging point, four 5T inverted chains are used for connecting an operation platform beam, a bearing small column is cut off, an operation platform and a bearing support connecting bolt are opened, the operation platform is integrally lifted by the inverted chains, and then the operation platform is integrally dismantled in a layered mode by an automobile crane; and after the lower part is dismantled, the whole operation platform is hoisted to the ground by using a truck crane.
The frustum-shaped roof truss high-altitude positioning construction method is characterized by further comprising the step four of hanging a lead cone in the middle of the positioning hole, adjusting the lead cone through a guy cable and a ground circle center reference point, and enabling the circle center positioning plate and the operation platform to be firmly welded in a spot mode.
According to the invention, a bearing support and an operation platform are built, the circle center of the operation platform of the bearing support is found out, a positioning steel plate and a positioning hole are arranged, a hanging lead cone and the reference point of the circle center of the ground are adjusted through a cable rope, a steel ring beam subsection hoisting technology is adopted, the central line of a connecting plate on an adjusting ring beam is superposed with the axis led up from the ground, the distance between the circle centers of the connecting plate and the axis led up from the ground is adjusted and positioned according to the arcs discharged on the operation platform and the top of a column, a jack is adopted to match a steel tape to adjust the elevation, then an oblique beam is installed in a symmetrical mode, the structure generates load capacity after the installation is finished, and.
Compared with the traditional construction method, the frustum-shaped roof truss high-altitude positioning construction method has the characteristics of strong operability, safety, reliability, high positioning precision, remarkable economic benefit and the like.
Detailed Description
The construction method mainly comprises a bearing support, an operation platform and a positioning support system.
1. The bearing support mainly plays a temporary supporting role for the upper circular truncated cone-shaped roof truss. Stress calculation and BIM simulation are carried out by adopting computer stress analysis software according to load bearing, the load bearing support structure is ensured to meet the upper load requirement, the load bearing support is formed by assembling standard joints welded by circular steel tubes, the standard joints are connected by bolts, and the assembling height is determined according to the elevation of the roof truss.
2. The operation platform is connected to the upper portion of the bearing support through bolts, mainly provides an adjusting and positioning platform of a roof truss structure and an operation platform of constructors, is made of welded section steel, the shape and size of the operation platform can be determined according to the size of the roof truss structure, the specification of the section steel is determined according to the number of the constructors and the dead weight of the roof truss structure, and a checkered plate of 6mm is laid on the surface of the platform.
3. The positioning support is welded on the operating platform and used for marking the spatial position and the elevation of the ring beam of the positioning roof truss, the horizontal position of the ring beam is marked on the operating platform, the positioning support is arranged at the marked position and used as a control basis for the horizontal position of the ring beam, and a jack is arranged on the support and used for adjusting the elevation of the ring beam.
The working process is as follows:
the method comprises the following steps: assembling the standard sections of the bearing support with corresponding specifications and quantity according to the load weight and elevation of the roof truss by taking the ground circle center datum point as the central position of the bearing support;
step two: the four corners of the assembled bearing support are adjusted and fixed by a guy rope, and the verticality is ensured by the measurement of a theodolite;
step three: hoisting the operation platform on the bearing support integrally by using a truck crane, and fastening by using bolts;
step four: and finding out the circle center of the bearing support on the operating platform by utilizing the intersection point of the diagonals of the bearing support, and arranging a positioning steel plate and a positioning hole. A lead cone is hung in the middle of the positioning hole, the lead cone is adjusted through a cable wind rope and a ground circle center reference point, and the circle center positioning plate and the operation platform are firmly subjected to spot welding;
step five: and (4) according to the central point of the mounting support of the steel oblique beam of the conical shell roof, emitting two vertically and horizontally crossed axes, and marking. Then, according to the mark, two phi 1.2 paying-off steel wires, a 100.0m standard steel tape and a 100N tension meter are matched to pay out a cross intersection line, a plumb line is paid out from a circle center positioning plate, the intersection point of two newly arranged steel wires is intersected with a plumb line at the top end of the bracket, and the distance between the plumb line and the intersection point is not more than 25 mm;
step six: symmetrically guiding a vertical axis to the top of an operation platform by using a theodolite, releasing a positioning arc line on the operation platform by using a central point and a standard steel tape of 10.0m at a central distance, marking the intersection point of the arc line and the axis, and welding a positioning support outside the mark;
step seven: leading the intersection point of the horizontal arc line and the axis to the top of the support, and welding a positioning baffle at the intersection point to prevent the hoisting ring beam from sliding out of the datum line when in place;
step eight: the sectional hoisting ring beam is placed on the positioning support and is tightly attached to the positioning baffle, the central line of a connecting plate on the adjusting ring beam is superposed with the axis led up from the ground, a jack is adopted to be matched with a 50m steel tape to adjust the elevation of the ring beam, the jack is locked after the ring beam is adjusted in position, an inclined base plate is wedged tightly, the ring beam is fixed by spot welding, and then the stand columns are welded on the two sides of the ring beam on the platform to fix the ring beam;
step nine: the ring beam is integrally welded according to the reserved strain gap, the oblique beam is hoisted after the ring beam is checked to be correct, and the oblique beam is hoisted according to 1800 symmetry, so that the condition that a large unbalance load is generated on the steel ring beam in the hoisting process is avoided, and the verticality of the bearing support is timely detected and adjusted by using a theodolite in the process;
step ten: after the oblique steel beams and the support connecting rod pieces are installed and welded, and the deviation is allowed after the oblique steel beams and the support connecting rod pieces are detected to be in accordance with the standard, the bearing support can be detached for unloading, the unloading is carried out simultaneously and symmetrically, the oblique base plate is cut off, the jack is loosened, the steel platform is completely suspended, the elevation of the ring beam is measured by a level gauge before and after the unloading, and the elevation difference of the ring beam is in accordance with the design requirement.
Step eleven: after the roof is unloaded, the bearing support is dismantled, the BIM technology is applied to carry out stress analysis on the load capacity of the roof truss structure, construction simulation is carried out, construction is carried out after feasibility is ensured, a steel roof ring beam is used as a lifting point, four 5T inverted chains are connected with an operation platform beam, bearing small columns are cut off, an operation platform and a bearing support connecting bolt are opened, the inverted chains are used for integrally lifting the operation platform, and then the truck crane is used for integrally dismantling the roof truss structure in a layered mode. And after the lower part is dismantled, the whole operation platform is hoisted to the ground by using a truck crane.
Claims (2)
1. A high-altitude positioning construction method for a frustum-shaped roof truss is characterized by comprising the following steps:
the method comprises the following steps: assembling standard sections of the bearing support with corresponding specifications and quantity to form the bearing support according to the load weight and elevation of the roof truss by taking the ground circle center datum point as the central position of the bearing support;
step two: the four corners of the assembled bearing support are adjusted and fixed by a guy rope, and the verticality is ensured by the measurement of a theodolite;
step three: hoisting the operation platform on the bearing support integrally by using a truck crane, and fastening by using bolts;
step four: finding out the circle center of the bearing support on the operation platform by utilizing the diagonal intersection point of the bearing support, and arranging a positioning steel plate and a positioning hole;
step five: according to the central point of the mounting support of the steel oblique beam of the conical shell roof, two vertical and horizontal crossed axes are discharged and marked; then paying off by using two steel wires according to the marks, and cooperatively paying off a cross line by using a steel tape and a tension meter, and paying off a plumb line from a circle center positioning plate, wherein the intersection point of the two steel wires is intersected with a plumb line at the top end of the bracket, and the distance between the plumb line and the intersection point is not more than 25 mm;
step six: symmetrically guiding a vertical axis to the top of an operation platform by using a theodolite, releasing a positioning arc line on the operation platform by using a central point and a steel tape at a central distance, marking the intersection point of the arc line and the axis, and welding a positioning support outside the mark;
step seven: leading the intersection point of the horizontal arc line and the axis to the top of the support, and welding a positioning baffle at the intersection point to prevent the hoisting ring beam from sliding out of the datum line when in place;
step eight: the sectional hoisting ring beam is placed on the positioning support and is tightly attached to the positioning baffle, the central line of a connecting plate on the adjusting ring beam is superposed with the axis led up from the ground, the elevation of the sectional hoisting ring beam is adjusted by a jack matched with a steel tape, the jack is locked after the sectional hoisting ring beam is adjusted in position, the inclined base plate is wedged tightly, the sectional hoisting ring beam is fixed by spot welding, and the stand columns are welded on the two sides of the ring beam on the platform to fix the ring beam;
step nine: integrally welding the ring beam according to a reserved strain gap, hoisting the oblique beam after checking that the oblique beam is correct, and hoisting the oblique beam according to axial symmetry;
step ten: after the oblique steel beams and the support connecting rod pieces are installed and welded, and the deviation is allowed after the oblique steel beams and the support connecting rod pieces are detected to be in accordance with the standard, the bearing support can be detached for unloading, the unloading is carried out symmetrically at the same time, the oblique base plate is cut off, the jack is loosened, the steel platform is completely suspended, the elevation of the ring beam is measured by a level gauge before and after the unloading, and the elevation difference of the ring beam is in accordance with the design requirement;
step eleven: after the roof is unloaded, the bearing support is dismantled, the BIM technology is applied to carry out stress analysis on the load capacity of the roof truss structure, construction simulation is carried out, construction is carried out after feasibility is ensured, a steel roof ring beam is used as a hanging point, four 5T inverted chains are used for connecting an operation platform beam, a bearing small column is cut off, an operation platform and a bearing support connecting bolt are opened, the operation platform is integrally lifted by the inverted chains, and then the operation platform is integrally dismantled in a layered mode by an automobile crane; and after the lower part is dismantled, the whole operation platform is hoisted to the ground by using a truck crane.
2. The high altitude positioning construction method for frustum-shaped roof trusses according to claim 1, wherein the fourth step further comprises hanging a lead cone in the middle of the positioning hole, adjusting the lead cone through a guy cable and a ground circle center reference point, and firmly welding the circle center positioning plate and the operation platform by spot welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610454427.8A CN107524297B (en) | 2016-06-22 | 2016-06-22 | High-altitude positioning construction method for frustum-shaped roof truss |
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| CN201610454427.8A CN107524297B (en) | 2016-06-22 | 2016-06-22 | High-altitude positioning construction method for frustum-shaped roof truss |
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| CN107524297B true CN107524297B (en) | 2020-04-28 |
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| CN108915263B (en) * | 2018-06-29 | 2021-08-31 | 成都金玉雄辉建筑工程有限公司 | Method for building reference line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201223653Y (en) * | 2008-06-19 | 2009-04-22 | 江苏中兴建设有限公司 | Bight for safety operation of conical roof |
| CN101666163A (en) * | 2009-09-15 | 2010-03-10 | 中冶建工有限公司 | High-altitude long-span roofing pipe truss installation method |
-
2016
- 2016-06-22 CN CN201610454427.8A patent/CN107524297B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201223653Y (en) * | 2008-06-19 | 2009-04-22 | 江苏中兴建设有限公司 | Bight for safety operation of conical roof |
| CN101666163A (en) * | 2009-09-15 | 2010-03-10 | 中冶建工有限公司 | High-altitude long-span roofing pipe truss installation method |
Non-Patent Citations (3)
| Title |
|---|
| 北京奥林匹克篮球馆屋面工程施工技术;周辉，朱立芳;《建筑技术》;20080630;第39卷(第6期);全文 * |
| 圆形煤场球壳钢网架高空散装法施工技术;柳松等;《施工技术》;20141231;全文 * |
| 大跨度钢网架安装工艺和质量关键点防控;张学刚，韩志永;《电力建设》;20111130;第32卷(第11期);全文 * |
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