CN110728045A - Reverse model selection method for fabricated concrete building tower crane - Google Patents
Reverse model selection method for fabricated concrete building tower crane Download PDFInfo
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Abstract
The invention relates to a reverse model selection method for an assembled concrete building tower crane, which comprises the following steps: 1) establishing a tower crane database for providing selectable tower crane models; 2) obtaining the heaviest position of the prefabricated member of the fabricated concrete building and marking the heaviest position; 3) sequentially making n concentric circles by taking the heaviest position of the concrete building prefabricated part as the center of a circle and the sequentially reduced arm length of the tower crane as the radius; 4) acquiring a safety index value according to a geological environment database of a distribution type concrete building construction area; 5) taking the intersection point of the concentric circles and the outer edge of the fabricated concrete building as a primary selection position point, and acquiring the comprehensive performance data value T (T) of the tower crane at all n primary selection position points1，T2，......Tn) (ii) a 6) Using tower crane comprehensive data optimal value ToptThe corresponding initial selection position point is used as the final selection positionAnd determining the final model selection of the tower crane. Compared with the prior art, the method has the advantages of reasonability, accuracy, timeliness and the like.
Description
Technical Field
The invention relates to the field of fabricated building construction, in particular to a reverse model selection method for a fabricated concrete building tower crane.
Background
The assembled concrete building tower crane type selection requires safety, economy and reasonableness. In the conventional BIM-based tower crane plane arrangement, the weight of a hoisting member in a tower crane range is checked mainly by establishing a BIM model and a tower crane model of the hoisting member, so that the hoisting weight is optimized within an allowable arm length range of the tower crane (for example, a steel structure is split again or the original 30 steel bars are adjusted into 25 steel bars in a bundle), and the hoisting weight is reasonably arranged in a tower crane coverage range; the hoisting members of the assembled steel structure and wood structure buildings can be hoisted randomly in sections, blocks and batches, so that the hoisting range of the selected hoisting equipment is met, and the technical safety is ensured; the weight of each prefabricated single component (such as a wall plate) of the fabricated concrete building can reach more than 4 tons, the prefabricated single component can not be split into smaller units, and a high requirement is provided for the hoisting capacity of the tower crane, so that the fabricated concrete building can meet the hoisting requirement of the condition of a large prefabricated component (a concrete prefabricated component) besides the requirements of segmenting, blocking and splitting smaller units in batches of steel structures and wood structures, the fabricated concrete building can not be subjected to decrement optimization design like the traditional tower crane type selection, and a reasonable type selection method of the fabricated concrete building is actually different from the traditional arrangement thought and is a 'reverse' and completely different process, and the type selection arrangement of the tower crane is specially carried out for the special structural form of the fabricated concrete building.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a reverse model selection method of an assembled concrete building tower crane.
The purpose of the invention can be realized by the following technical scheme:
a reverse model selection method for an assembled concrete building tower crane comprises the following steps:
1) establishing a tower crane database for providing selectable tower crane models;
2) obtaining the heaviest position of the prefabricated member of the fabricated concrete building and marking the heaviest position;
3) sequentially making n concentric circles by taking the heaviest position of the concrete building prefabricated part as the center of a circle and the sequentially reduced arm length of the tower crane as the radius;
4) acquiring a safety index value according to a geological environment database of a distribution type concrete building construction area;
5) taking the intersection point of the concentric circles and the outer edge of the fabricated concrete building as a primary selection position point, and acquiring the comprehensive performance data value T (T) of the tower crane at all n primary selection position points1，T2，......Tn)；
6) Using tower crane comprehensive data optimal value ToptAnd taking the corresponding initial selection position point as a final selected position, and determining the final model selection of the tower crane.
In the step 1), the tower crane database is QTZ63, QTZ80 and QTZ125, and the contents of the database comprise lifting capacity, lifting arm long distance, lifting height data and tower crane purchasing and leasing operation data.
And in the step 4), the geological environment data in the geological environment database of the precast concrete construction region comprise geological survey report data, peripheral wind speed and the position of the geological survey report data in a downtown area or an open area.
In the step 5), the comprehensive performance data value
Wherein x is a safety index, and y is an economic index.
In the step 6), the optimal value T of the comprehensive data of the tower craneopt＝Max(T1，T2，......Tn)。
The step 6) further comprises the following steps:
and finely adjusting the final selected position according to the tower crane wall attachment length z, wherein the value range of the tower crane wall attachment length z is 1-2 m.
In the step 3), the range of the arm length of the tower crane is 5-65 m.
And if the heaviest positions of the concrete building prefabricated parts are multiple, acquiring the final selected position of the corresponding tower crane through multiple concentric circles.
Compared with the prior art, the invention has the following advantages:
the method aims at the key factor that the assembled concrete building member is the heaviest hoisting weight, and combines the safety and economic parameters to reversely select the actual arrangement of the tower crane, and the method can reasonably, accurately and timely determine the model selection scheme of the assembled concrete building tower crane.
Drawings
Figure 1 is a flow chart of the method of the present invention,
FIG. 2 is a schematic diagram of an alternative embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
As shown in fig. 1, the invention provides a reverse model selection method for an assembled concrete building tower crane, which specifically comprises the following steps:
step 1, establishing an intra-industry tower crane database, such as QTZ63, QTZ80 and QTZ125, wherein parameters in the database comprise a tower crane database including lifting capacity, lifting arm long distance, lifting height data and tower crane purchasing and leasing operation data, and determining optional models of tower cranes;
step 2, determining the heaviest position of the prefabricated part of the fabricated concrete building; if the heaviest structural member is a superposed shear wall plate with the length of 4.5t and is positioned on the standard layer, displaying the plane position of any standard layer such as the 6 th layer, and marking the position of the superposed shear wall plate which is positioned on the southwest corner of the 6 th layer;
step 3, taking the heaviest member in the plane arrangement of the fabricated concrete building as a center (for example, four centers of O1, O2, O3 and O4 in fig. 2, the prefabricated member with the heaviest general fabricated concrete project is distributed at four corners of the floor plane), taking the initially selected crane lifting radius length as a radius (for example, R is 50m), drawing an initial circle and four corners, wherein at least 4N concentric circles are formed on each floor, and the intersection point of the concentric circles and the outer edge of the building is taken as the initial position of the crane, specifically:
the crane arm length is gradually reduced (from long to short along the arm length), and in this example, at least 3 other circles (only one circle is drawn in the figure) can be drawn according to the arm length R which is 45m, 40m and 35m. Because the hoisting radius of the tower crane is also changed, if the crane is selected between 5-65m of arm length, N concentric circles can be drawn at each of four corner points (R is any one value of 5-65m, and N1, N2 and N3 concentric circles corresponding to different radii are drawn in the figure and marked by red);
step 4, establishing a geological environment database of the precast concrete building construction area for calculating a comprehensive performance data value T corresponding to the initial position of the tower crane if the project is located in the Shanghai with spacious periphery and 4m/s wind speed;
step 5, calculating a comprehensive performance data value T (T) corresponding to the initial position of each tower crane1，T2，......Tn) For the first tower crane comprehensive performance data value T1When x is a safety index of 1.1 and y is an economic index of 1.3, T is1＝1.1/1.3≈0.85。
Step 6, reversely determining the possible position of the tower crane and the comprehensive performance data value T of the tower crane corresponding to the positionnIn this example, T2＝1.1/1.25≈0.88，T3＝1.3/1.3＝1，T4＝1.2/1.25＝0.96；
Step 7, determining the optimal value T of comprehensive data of the tower craneopt＝Max(T1,T2,T3,T4) Determining the final position and model of the tower crane;
and 8, accurately fine-adjusting according to the wall-attached length z of the tower crane, wherein the value range of the wall-attached length z of the tower crane is 1-2 m, and the final position of the tower crane in the embodiment is a position where z is 1 m.
Claims (8)
1. The reverse model selection method for the fabricated concrete building tower crane is characterized by comprising the following steps of:
1) establishing a tower crane database for providing selectable tower crane models;
2) obtaining the heaviest position of the prefabricated member of the fabricated concrete building and marking the heaviest position;
3) sequentially making n concentric circles by taking the heaviest position of the concrete building prefabricated part as the center of a circle and the sequentially reduced arm length of the tower crane as the radius;
4) acquiring a safety index value according to a geological environment database of a distribution type concrete building construction area;
5) taking the intersection point of the concentric circle and the outer edge of the fabricated concrete building as a primary selection position point, and obtainingTower crane comprehensive performance data values T (T) at all n primary selection position points1，T2，......Tn)；
6) Using tower crane comprehensive data optimal value ToptAnd taking the corresponding initial selection position point as a final selected position, and determining the final model selection of the tower crane.
2. The method for reverse model selection of the fabricated concrete building tower crane according to claim 1, wherein in the step 1), the tower crane databases are QTZ63, QTZ80 and QTZ125, and the contents of the tower crane databases comprise lifting capacity, lifting arm long distance, lifting height data and tower crane purchase and lease operation data.
3. The method for reverse model selection of the fabricated concrete building tower crane according to claim 1, wherein in the step 4), the geological environment data in the geological environment database of the construction area of the precast concrete building comprise geological survey report data, peripheral wind speed, and positions of the prefabricated concrete building tower crane in downtown areas and open areas.
4. The reverse model selection method for the fabricated concrete building tower crane according to claim 1, wherein in the step 5), the comprehensive performance data value
Wherein x is a safety index, and y is an economic index.
5. The reverse model selection method for the fabricated concrete building tower crane according to claim 4, wherein in the step 6), the optimal value T of the comprehensive data of the tower crane isopt＝Max(T1，T2，......Tn)。
6. The reverse model selection method for the fabricated concrete building tower crane according to claim 4, wherein the step 6) further comprises the following steps:
and finely adjusting the final selected position according to the tower crane wall attachment length z, wherein the value range of the tower crane wall attachment length z is 1-2 m.
7. The reverse model selection method for the fabricated concrete building tower crane according to claim 1, wherein in the step 3), the range of the arm length of the tower crane is 5-65 m.
8. The reverse shape selection method of the fabricated concrete building tower crane according to claim 1, wherein if a plurality of heaviest positions of the concrete building prefabricated parts exist, the corresponding final selected position of the tower crane is obtained through a plurality of concentric circles.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112507537A (en) * | 2020-11-26 | 2021-03-16 | 筑友智造科技投资有限公司 | Tower crane arrangement method, device and system |
| CN113378271A (en) * | 2021-06-10 | 2021-09-10 | 广联达科技股份有限公司 | Method for calculating installation height of group tower and computer readable storage medium |
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| CN106986275A (en) * | 2017-03-13 | 2017-07-28 | 同济大学 | A kind of assembled architecture plane layout of tower crane and selection method based on BIM |
| CN107386660A (en) * | 2017-08-02 | 2017-11-24 | 中国十七冶集团有限公司 | Tower crane system in prefabricated concrete structure construction based on BIM technology |
| CN109086490A (en) * | 2018-07-04 | 2018-12-25 | 中国二十冶集团有限公司 | A kind of tower crane type selecting method for arranging of the assembled engineering based on BIM technology |
| CN109241612A (en) * | 2018-08-31 | 2019-01-18 | 中国二十冶集团有限公司 | The method that assembled architecture tower crane model and position determine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986275A (en) * | 2017-03-13 | 2017-07-28 | 同济大学 | A kind of assembled architecture plane layout of tower crane and selection method based on BIM |
| CN107386660A (en) * | 2017-08-02 | 2017-11-24 | 中国十七冶集团有限公司 | Tower crane system in prefabricated concrete structure construction based on BIM technology |
| CN109086490A (en) * | 2018-07-04 | 2018-12-25 | 中国二十冶集团有限公司 | A kind of tower crane type selecting method for arranging of the assembled engineering based on BIM technology |
| CN109241612A (en) * | 2018-08-31 | 2019-01-18 | 中国二十冶集团有限公司 | The method that assembled architecture tower crane model and position determine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112507537A (en) * | 2020-11-26 | 2021-03-16 | 筑友智造科技投资有限公司 | Tower crane arrangement method, device and system |
| CN113378271A (en) * | 2021-06-10 | 2021-09-10 | 广联达科技股份有限公司 | Method for calculating installation height of group tower and computer readable storage medium |
| CN113378271B (en) * | 2021-06-10 | 2024-04-12 | 广联达科技股份有限公司 | Method for calculating installation height of group tower and computer readable storage medium |
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Application publication date: 20200124 |