CN101762380A - Method for testing vertical ultimate stable bearing capacity of scaffold - Google Patents
Method for testing vertical ultimate stable bearing capacity of scaffold Download PDFInfo
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- CN101762380A CN101762380A CN 200810194692 CN200810194692A CN101762380A CN 101762380 A CN101762380 A CN 101762380A CN 200810194692 CN200810194692 CN 200810194692 CN 200810194692 A CN200810194692 A CN 200810194692A CN 101762380 A CN101762380 A CN 101762380A
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Abstract
The invention discloses a technical scheme to provide a method for testing the vertical ultimate stable bearing capacity of a scaffold, which comprises the following steps: (1) erecting a scaffold tower with a preset height; (2) adjusting the heights of a lower base and an upper support seat; (3) erecting an I-beam and a crossbeam on the top of the scaffold tower; and (4) exerting a load on the crossbeam, controlling the loading level with a calibrated oil pressure gauge, simultaneously using a sensor arranged on the top of a test frame to obtain the actual value of the exerted force, arranging 8 dial indicators to read the displacement of a main pipe under the load of each level, and recording the measured ultimate value when the displacement changes dramatically, indicating the tower is on the edge of being damaged. The invention provides improvement suggestion on the method for testing the vertical ultimate stable bearing capacity of the scaffold based on the actual conditions of existing engineering construction, testing, detection and the like and in combination with the standards of enterprises, and also provides references for quality detection and establishment of industrial standards of other testing laboratories.
Description
Technical field
The present invention relates to a kind of test method of construction equipment, especially a kind of method for testing vertical ultimate stable bearing capacity of scaffold.
Background technology
The plug-in type steel pipe scaffold is the non-fastener type steel pipe scaffold of developing in recent years, mainly comprise vertical rod, cross bar, brace, lower bottom base, upper bracket, its essential structure principle is to form basic pylon unit by latch that is welded on cross bar or brace termination and the dish overlap joint buckled that is welded on the person in charge.Yet, the various structural behaviours of each parts of plug-in type steel pipe scaffold and pylon, except that company standard, the country of Shang Wuke reference, industry or provincial standard are to the evaluation of testing of its quality.
Summary of the invention
The object of the present invention is to provide a kind of simple to operate, reliable method for testing vertical ultimate stable bearing capacity of scaffold.
Technical scheme of the present invention provides a kind of method for testing vertical ultimate stable bearing capacity of scaffold, described framing scaffold comprises the tubulose vertical rod of bracelet dish, cross bar, brace, lower bottom base and upper bracket is characterized in that: described method for testing vertical ultimate stable bearing capacity of scaffold comprises the following steps:
(1) use described vertical rod, cross bar, lower bottom base, upper bracket is built the framing scaffold pylon of predetermined altitude;
(2) regulate lower bottom base, upper bracket height;
(3) set up joist steel and crossbeam at described framing scaffold tower top;
(4) described crossbeam is applied load, utilize and demarcate good oil pressure gauge control loaded grade, the sensor that utilizes test stand to push up simultaneously draws the size of the actual power of applying, arrange that simultaneously 8 dial gauges read the displacement size of being responsible under every grade of load, when sharply changing, displacement represents that support body is about to destroy, record measuring limit value.
The present invention is according to the actual conditions of existing engineering construction, test detection etc., in conjunction with company standard spirit method for testing vertical ultimate stable bearing capacity of scaffold has been proposed improvement idea, provide reference for other detects the foundation etc. that testing laboratory carries out quality testing and industry standard.
Description of drawings
Below in conjunction with accompanying drawing the embodiment of the invention is further elaborated.
Fig. 1 is respectively 450 millimeters for using high 1500mm of step, rise bracket, downward modulation base to insert size, and the synoptic diagram that diagonal brace framing scaffold pylon carries out method for testing vertical ultimate stable bearing capacity is set.
Fig. 2 is respectively 450 millimeters for using high 1500mm of step, rise bracket, downward modulation base to insert size, and no diagonal brace framing scaffold pylon carries out the synoptic diagram of method for testing vertical ultimate stable bearing capacity.
Fig. 3 is for using high 1000mm of step, raising bracket and insert and be of a size of 450 millimeters, downward modulation base and insert and be of a size of 600 millimeters, and no diagonal brace framing scaffold pylon carries out the synoptic diagram of method for testing vertical ultimate stable bearing capacity.
Fig. 4 is for using high 1000mm of step, and rise bracket, downward modulation base insert size and be respectively 450 millimeters, and no diagonal brace framing scaffold pylon carries out the synoptic diagram of method for testing vertical ultimate stable bearing capacity.
Fig. 5 is for using high 500mm of step, and rise bracket, downward modulation base insert size and be respectively 450 millimeters, and no diagonal brace framing scaffold pylon carries out the synoptic diagram of method for testing vertical ultimate stable bearing capacity.
Embodiment
Framing scaffold of the present invention comprises lower bottom base 1, the tubulose vertical rod 2 of bracelet dish 7, and cross bar 3, brace 8, and upper bracket 4 use lower bottom base, vertical rod, cross bar, the upper bracket pylon that scaffolds erecting sets up joist steel 5 and crossbeam 6 at the framing scaffold tower top.Method for testing vertical ultimate stable bearing capacity of scaffold of the present invention uses the step high as 1500mm, 1000mm, 500mm and have or not heteroid pylon such as diagonal brace (as Fig. 1 to shown in Figure 5) to test respectively, and test drawing each ultimate bearing capacity.Utilize and demarcate good oil pressure gauge control loaded grade, the sensor that utilizes test stand to push up simultaneously draws the size of the actual power of applying, arrange that simultaneously 8 dial gauges read the displacement size of being responsible under every grade of load, represent that when displacement sharply changes support body is about to destroy, record measuring limit value.
Test one: go on foot high 1500mm, rise bracket, downward modulation base insertion size H1 and H2 and be respectively 450 millimeters, diagonal brace framing scaffold pylon is set as shown in Figure 1:
As shown in Figure 1, require to set up to test support body, arrange lifting jack, sensor and dial gauge according to structure.In the permissible error scope, can think that every thribble bears the axial pressure of identical size.After at first preload 10kN checks charger, load, read dial gauge reading, sensor reading after every grade of loading in 2-3 minute by every grade of 80kN; Read sensor full-scale reading when support body destroys.
Test findings: load step by step, read the dial gauge reading, till load can not increase, expression test support body is unstable failure.During unstable failure, the support body displacement increases rapidly, and vertical rod produces bending-buckling and destroys, and diagonal brace also can produce flexural deformation simultaneously.
The force-displacement curve that test draws is as shown in table 1, limit stability bearing capacity F=546kN (4 vertical rods)
Table 1F-DIS curve
Test two: go on foot high 1500mm, rise bracket, downward modulation base insertion size H1 and H2 and be respectively 450 millimeters, no diagonal brace framing scaffold pylon as shown in Figure 2.
Process of the test: with test one.
Test findings: load step by step, read the dial gauge reading, till load can not increase, expression test support body is unstable failure.During unstable failure, the support body displacement increases rapidly, and the whole torsional buckling of test support body destroys.Force-displacement curve such as table 2 that test draws, limit stability bearing capacity F=346kN (4 vertical rods)
Table 2F-DIS curve
Test three: go on foot high 1000mm, raise bracket insert size H1 be 450 millimeters, downward modulation base to insert size H2 be 600 millimeters, no diagonal brace framing scaffold pylon is as shown in Figure 3.
Process of the test: with test one.
Test findings: load step by step, read the dial gauge reading, till load can not increase, expression test support body is unstable failure.During unstable failure, the support body displacement increases rapidly, and the whole torsional buckling of test support body destroys.The force-displacement curve that test draws is as shown in table 3, limit stability bearing capacity F=296kN (4 vertical rods).
Table 3F-DIS curve
Test four: go on foot high 1000mm, raise bracket, downward modulation base insertion size H1 and H2 and be respectively 450 millimeters, no diagonal brace framing scaffold pylon as shown in Figure 4.
Process of the test: with test one.
Test findings: load step by step, read the dial gauge reading, till load can not increase, expression test support body is unstable failure.During unstable failure, the support body displacement increases rapidly, and the whole torsional buckling of test support body destroys.Force-displacement curve such as table 4 that test draws, limit stability bearing capacity F=446kN (4 vertical rods).
Table 4F-DIS curve
Test five: go on foot high 500mm, raise bracket, downward modulation base insertion size H1 and H2 and be respectively 450 millimeters, no diagonal brace framing scaffold pylon as shown in Figure 5.
Process of the test: see the AS1 process of the test for details.
Test findings: load step by step, read the dial gauge reading, till load can not increase, expression test support body is unstable failure.During unstable failure, the support body displacement increases rapidly, and the whole torsional buckling of test support body destroys.Force-displacement curve such as table 5 that test draws, limit stability bearing capacity F=546kN (4 vertical rods).
Table 5
Conclusion (of pressure testing):
1. contrast test one and test two are not provided with the diagonal brace bearing capacity and reduce about 36.7%;
2. contrast test three and test four, adjustable base reduces about 33.6% apart from bottom anistree dish 600mm than coiling the 450mm bearing capacity apart from the bottom anise;
3. contrast test two is not provided with under the diagonal brace situation with test four and test five, and it is about 29% that the bearing capacity that the support body bearing capacity ratio that goes on foot high 1000mm goes on foot high 1500mm improves, and the bearing capacity that the support body bearing capacity ratio that goes on foot high 500mm goes on foot high 1500mm improves about 58%
The failure mode that 4. the diagonal brace correspondence is set is a bending-buckling destruction, and what the diagonal brace correspondence was not set is that torsional buckling destroys.
Claims (3)
1. method for testing vertical ultimate stable bearing capacity of scaffold, described framing scaffold comprises the tubulose vertical rod of bracelet dish, cross bar, brace, lower bottom base and upper bracket is characterized in that: described method for testing vertical ultimate stable bearing capacity of scaffold comprises the following steps:
(1) use described vertical rod, cross bar, lower bottom base, upper bracket is built the framing scaffold pylon of predetermined altitude;
(2) regulate lower bottom base, upper bracket height;
(3) set up joist steel and crossbeam at described framing scaffold tower top;
(4) described crossbeam is applied load, utilize and demarcate good oil pressure gauge control loaded grade, the sensor that utilizes test stand to push up simultaneously draws the size of the actual power of applying, arrange that simultaneously 8 dial gauges read the displacement size of being responsible under every grade of load, when sharply changing, displacement represents that support body is about to destroy, record measuring limit value.
2. method for testing vertical ultimate stable bearing capacity of scaffold according to claim 1 is characterized in that: described framing scaffold pylon height is got 500 millimeters respectively, 1000 millimeters and 1500 millimeters.
3. according to the described method for testing vertical ultimate stable bearing capacity of scaffold of claim 1, it is characterized in that: described framing scaffold pylon can also be provided with brace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810194692 CN101762380B (en) | 2008-11-17 | 2008-11-17 | Method for testing vertical ultimate stable bearing capacity of scaffold |
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| CN 200810194692 CN101762380B (en) | 2008-11-17 | 2008-11-17 | Method for testing vertical ultimate stable bearing capacity of scaffold |
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| CN101762380A true CN101762380A (en) | 2010-06-30 |
| CN101762380B CN101762380B (en) | 2013-04-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564754A (en) * | 2011-12-31 | 2012-07-11 | 中联重科股份有限公司 | Structural member stability test device |
| CN113916652A (en) * | 2021-08-31 | 2022-01-11 | 中国建筑第四工程局有限公司 | Test device and test method for detecting cantilever-bearing steel beam of scaffold |
| CN114689438A (en) * | 2022-04-11 | 2022-07-01 | 江苏鑫昇腾科技发展股份有限公司 | Climbing frame state detection device for construction site and method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29715170U1 (en) * | 1997-08-23 | 1997-10-30 | Merkel, Gerald, Nassau, Bahamas | Vertical diagonal bracing for wedge pocket modular scaffolds |
| JP4020894B2 (en) * | 2004-07-08 | 2007-12-12 | アルインコ株式会社 | Aluminum scaffolding and scaffolding equipment |
| CN2831091Y (en) * | 2005-09-22 | 2006-10-25 | 深圳市新三思材料检测有限公司 | Torque rigid performance tester for square fastening |
-
2008
- 2008-11-17 CN CN 200810194692 patent/CN101762380B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564754A (en) * | 2011-12-31 | 2012-07-11 | 中联重科股份有限公司 | Structural member stability test device |
| CN102564754B (en) * | 2011-12-31 | 2013-07-03 | 中联重科股份有限公司 | Structural member stability test device |
| CN113916652A (en) * | 2021-08-31 | 2022-01-11 | 中国建筑第四工程局有限公司 | Test device and test method for detecting cantilever-bearing steel beam of scaffold |
| CN114689438A (en) * | 2022-04-11 | 2022-07-01 | 江苏鑫昇腾科技发展股份有限公司 | Climbing frame state detection device for construction site and method thereof |
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| CN101762380B (en) | 2013-04-03 |
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Address after: 214194 Wuxi, Xishan, tin tin, Beizhen, Hong Kong West Road, No. 107 Patentee after: JIANGSU RAPID SCAFFOLDING (ENGINEERING) Co.,Ltd. Address before: 214194 Wuxi, Jiangsu Province, tin West Road, No. 107 Patentee before: RAPID SCAFFOLDING (ENGINEERING) Co.,Ltd. |
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Effective date of registration: 20190123 Address after: 214192 No. 107 Xigang West Road, Xibei Town, Xishan District, Wuxi City, Jiangsu Province Patentee after: Jiangsu Suichuang Aluminum Industry Co.,Ltd. Address before: 214194 No. 107 Xigang West Road, Xibei Town, Xishan District, Wuxi City, Jiangsu Province Patentee before: JIANGSU RAPID SCAFFOLDING (ENGINEERING) Co.,Ltd. |
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Effective date of registration: 20230828 Address after: 063606 Leting Economic Development Zone, Tangshan, Hebei Patentee after: Hebei Jiangpai Mold Frame Technology Co.,Ltd. Address before: 214192 No. 107 Xigang West Road, Xibei Town, Xishan District, Wuxi City, Jiangsu Province Patentee before: Jiangsu Suichuang Aluminum Industry Co.,Ltd. |
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