CN104153589B - A kind of roof system steel truss suspension centre hoisting power detection method - Google Patents

A kind of roof system steel truss suspension centre hoisting power detection method Download PDF

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Publication number
CN104153589B
CN104153589B CN201410427319.2A CN201410427319A CN104153589B CN 104153589 B CN104153589 B CN 104153589B CN 201410427319 A CN201410427319 A CN 201410427319A CN 104153589 B CN104153589 B CN 104153589B
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China
Prior art keywords
suspension centre
detected
steel truss
load
roof
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CN201410427319.2A
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Chinese (zh)
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CN104153589A (en
Inventor
段必海
徐小洋
梁志毅
刘兴军
王伟
刘志红
吕福磊
孙友建
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中国建筑第二工程局有限公司
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Priority to CN201410427319.2A priority Critical patent/CN104153589B/en
Publication of CN104153589A publication Critical patent/CN104153589A/en
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Abstract

The invention discloses a kind of roof system steel truss suspension centre hoisting power detection method, described roof system steel truss will install hanging layer after lifting certain altitude in its underpart, the detection of described suspension centre hoisting power is carried out before described hanging layer is installed, and comprises the following steps: (1) first overall examination promotes; (2) single-point loads test at full capacity; (3) single-point overload test; (4) unload; (5) step (2)-(4) are repeated to all the other suspension centres to be detected.Detection method of the present invention is simple, reliable, effectively can increase safety stock, is applicable to the construction of the building arranging hanging layer under Roof Truss.

Description

A kind of roof system steel truss suspension centre hoisting power detection method

Technical field

The present invention relates to Large Steel trussed roof building, particularly relate to a kind of roof system steel truss suspension centre hoisting power detection method.

Background technology

In the building adopting Large Steel trussed roof, the multilayer floor slab below roof system steel truss can adopt hanging Rotating fields.Hanging Rotating fields can give full play to the carrying effect of roof system steel truss, saves the vertical structure material of inner floor, meets the requirement of building interior large space simultaneously.

Hanging layer is hung on roof system steel truss bottom, comprises the flase floor on hanging beam and hanging beam.Adopt the building of hanging layer when constructing, first spelling completes roof system, after roof system being promoted certain altitude, hanging layer is installed again, although the lifting of roof system just implements after calculating lifting counter-force by software, ensure that the safety of lifting process to a certain extent, but can not determine after installation hanging layer, whether each node of roof system steel truss and rod member also can ensure structural safety, especially for some building, the load weight of roof system steel truss and hanging layer is rare, and be irregular structure, once certain suspension centre hoisting power is not enough, catastrophic effect will be caused, therefore, before hanging layer is installed, each suspension centre hoisting power that roof system steel truss comprises under the full load situation of hanging layer must be detected again.

Summary of the invention

The object of this invention is to provide a kind of roof system steel truss suspension centre hoisting power detection method.

For achieving the above object, present invention employs following technical scheme:

A kind of roof system steel truss suspension centre hoisting power detection method, described roof system steel truss will install hanging layer after lifting certain altitude in its underpart, the detection of described suspension centre hoisting power is carried out before described hanging layer is installed, and comprises the following steps:

(1) overall examination promotes first

Roof system steel truss is promoted 200mm, measure the level of each suspension centre, and finely tuned by lifter and adjust horizontal attitude, guarantee that each hoisting point position steel truss winds up and be in same level, determine the absolute altitude that winds up, measure steel truss downwarp value, and monitor the deformation of each suspension centre place steel truss and reinforcement measure, detected value and design load are compared.

(2) single-point loads test at full capacity

Continue loading to the lifter of the first suspension centre to be detected, the lifter of all the other suspension centres still remains on the state after having promoted for the first time, stops loading when the lifter load application of the first suspension centre to be detected reaches design standard value; Measure the vertical displacement of the first suspension centre to be detected and adjacent suspension centre thereof, and monitor the deformation of the first suspension centre place truss to be detected and reinforcement measure, detected value and design load are compared.

(3) single-point overload test

Continue to load to the first suspension centre to be detected, until reach predetermined overload value, stop loading, measure displacement and the distortion of the first suspension centre to be detected and adjacent suspension centre thereof, and monitor the deformation of the first suspension centre place truss to be detected and reinforcement measure, detected value and design load are compared.

(4) unload

After loading terminates, stop 5-10 minute, the lifter of the first suspension centre to be detected is unloaded, until hoist load be returned to step (1) promoted after load.

(5) above-mentioned steps (2)-(4) are repeated to all the other suspension centres to be detected, until all suspension centres to be detected detect complete;

In step (1)-(5) process, exceed displacement or the distortion of design load if do not occur, then it is qualified to detect; Exceed displacement or the distortion of design load if occur, then detect defective, must consolidation process be carried out, and then detect.

For ensureing safety, below each suspension centre, pading plate between steel truss and ground surface platform, can be added as support after each lifting terminates.

As preferably, lifting process adopts lifter cluster, and computer controls, hydraulic synchronizing lifting, and can to the load fixing quantity of each hoist point; The duty of hydraulic rockshaft, hydraulic pump source system, computer synchronous control system, sensing and detecting system should be kept a close eye in hydraulic pressure lift process.

Described predetermined overload value is determined according to the ratio of hanging layer load and roof system steel truss gravity load.

Beneficial effect of the present invention: roof system steel truss is promoted to a certain locking position by the present invention, control other suspension centre state constant, successively fully loaded, overload is loaded on to the single suspension centre of each suspension centre to be detected, because suspension centre is corresponding with steel truss support point, the condition responsive of each position of steel truss in observation experiment process, just the condition responsive of steel truss each position after installing hanging layer can be estimated, thus judge the safety reservation of steel truss hoisting power, simply, effectively, for work progress provides safety guarantee.

Below in conjunction with embodiment, the present invention will be further described.

Detailed description of the invention

A kind of roof system steel truss suspension centre hoisting power detection method, described roof system steel truss will install hanging layer after lifting certain altitude in its underpart, the detection of described suspension centre hoisting power is carried out before described hanging layer is installed, and comprises the following steps:

(1) overall examination promotes first

Roof system steel truss is promoted 200mm, measure the level of each suspension centre, and finely tuned by lifter and adjust horizontal attitude, guarantee that each hoisting point position steel truss winds up and be in same level, determine the absolute altitude that winds up, measure steel truss downwarp value, and monitor the deformation of each suspension centre place steel truss and reinforcement measure, detected value and design load are compared.

(2) single-point loads test at full capacity

Continue loading to the lifter of the first suspension centre to be detected, the lifter of all the other suspension centres still remains on the state after having promoted for the first time, stops loading when the lifter load application of the first suspension centre to be detected reaches design standard value; Measure the vertical displacement of the first suspension centre to be detected and adjacent suspension centre thereof, and monitor the deformation of the first suspension centre place truss to be detected and reinforcement measure, detected value and design load are compared.

(3) single-point overload test

Continue to load to the first suspension centre to be detected, until reach 1.3 times of design standard value, stop loading, measure displacement and the distortion of the first suspension centre to be detected and adjacent suspension centre thereof, and monitor the deformation of the first suspension centre place truss to be detected and reinforcement measure, detected value and design load are compared.

(4) unload

After loading terminates, stop 5-10 minute, the lifter of the first suspension centre to be detected is unloaded, until hoist load be returned to step (1) promoted after load.

(5) above-mentioned steps (2)-(4) are repeated to all the other suspension centres to be detected, until all suspension centres to be detected detect complete;

In step (1)-(5) process, exceed displacement or the distortion of design load if do not occur, then it is qualified to detect; Exceed displacement or the distortion of design load if occur, then detect defective, must consolidation process be carried out, and then detect.

Below each suspension centre, pading plate between steel truss and ground surface platform, can be added as support after each lifting terminates.

Lifting process adopts lifter cluster, and computer controls, hydraulic synchronizing lifting, and can to the load fixing quantity of each hoist point; The duty of hydraulic rockshaft, hydraulic pump source system, computer synchronous control system, sensing and detecting system should be kept a close eye in hydraulic pressure lift process.

Claims (4)

1. a roof system steel truss suspension centre hoisting power detection method, is characterized in that, described roof system steel truss will install hanging layer after lifting certain altitude in its underpart, and the detection of described suspension centre hoisting power is carried out before described hanging layer is installed, and comprises the following steps:
(1) overall examination promotes first
Roof system steel truss is promoted 200mm, measure the level of each suspension centre, and finely tuned by lifter and adjust level, guarantee that each hoisting point position steel truss winds up and be in same level, determine the absolute altitude that winds up, measure steel truss downwarp value, and monitor the deformation of each suspension centre place steel truss and reinforcement measure, detected value and design load are compared;
(2) single-point loads test at full capacity
Continue loading to the lifter of the first suspension centre to be detected, the lifter of all the other suspension centres still remains on the state after having promoted for the first time, stops loading when the lifter load application of the first suspension centre to be detected reaches design standard value; Measure the vertical displacement of the first suspension centre to be detected and adjacent suspension centre thereof, and monitor the deformation of the first suspension centre place truss to be detected and reinforcement measure, detected value and design load are compared;
(3) single-point overload test
Continue to load to the first suspension centre to be detected, until reach predetermined overload value, stop loading, measure displacement and the distortion of the first suspension centre to be detected and adjacent suspension centre thereof, and monitor the deformation of the first suspension centre place truss to be detected and reinforcement measure, detected value and design load are compared;
(4) unload
After loading terminates, stop 5-10 minute, the lifter of the first suspension centre to be detected is unloaded, until hoist load be returned to step (1) promoted after load;
(5) above-mentioned steps (2)-(4) are repeated to all the other suspension centres to be detected, until all suspension centres to be detected detect complete;
In step (1)-(5) process, exceed displacement or the distortion of design load if do not occur, then it is qualified to detect; Exceed displacement or the distortion of design load if occur, then detect defective, must consolidation process be carried out, and then detect.
2. roof system steel truss suspension centre hoisting power detection method according to claim 1, is characterized in that below each suspension centre, adding pading plate between steel truss and ground surface platform as support after each lifting terminates.
3. roof system steel truss suspension centre hoisting power detection method according to claim 1, it is characterized in that lifting process adopts lifter cluster, computer controls, hydraulic synchronizing lifting, and can to the load fixing quantity of each hoist point; The duty of hydraulic rockshaft, hydraulic pump source system, computer synchronous control system and sensing and detecting system should be kept a close eye in hydraulic pressure lift process.
4. roof system steel truss suspension centre hoisting power detection method according to claim 1, is characterized in that described predetermined overload value is determined according to the ratio of hanging layer load and roof system steel truss gravity load.
CN201410427319.2A 2014-08-27 2014-08-27 A kind of roof system steel truss suspension centre hoisting power detection method CN104153589B (en)

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CN104153589B true CN104153589B (en) 2016-04-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104631839B (en) * 2015-01-29 2016-08-24 浙江勤业建工集团有限公司 Ultra-high overweight large span aerial vestibule construction method for lifting whole

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04111829A (en) * 1990-08-30 1992-04-13 Shimizu Corp Method for constructing large-span roof
CN102071814A (en) * 2010-12-16 2011-05-25 中建二局第三建筑工程有限公司 High-rise long-span door type truss integral lifting device and construction method thereof
CN102505860A (en) * 2011-10-21 2012-06-20 温州建设集团有限公司 Novel Lifting method for irregularly-shaped steel structure member
CN102864875A (en) * 2012-10-11 2013-01-09 北京筑福建设工程有限责任公司 A-shaped roof truss steel rod structure system and construction method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04111829A (en) * 1990-08-30 1992-04-13 Shimizu Corp Method for constructing large-span roof
CN102071814A (en) * 2010-12-16 2011-05-25 中建二局第三建筑工程有限公司 High-rise long-span door type truss integral lifting device and construction method thereof
CN102505860A (en) * 2011-10-21 2012-06-20 温州建设集团有限公司 Novel Lifting method for irregularly-shaped steel structure member
CN102864875A (en) * 2012-10-11 2013-01-09 北京筑福建设工程有限责任公司 A-shaped roof truss steel rod structure system and construction method thereof

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