CN106836845B - Deformation control method and system for reserved structure after joist column pulling - Google Patents
Deformation control method and system for reserved structure after joist column pulling Download PDFInfo
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- CN106836845B CN106836845B CN201710237119.4A CN201710237119A CN106836845B CN 106836845 B CN106836845 B CN 106836845B CN 201710237119 A CN201710237119 A CN 201710237119A CN 106836845 B CN106836845 B CN 106836845B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000004567 concrete Substances 0.000 claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims description 2
- 238000005336 cracking Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 238000009424 underpinning Methods 0.000 claims description 2
- 238000013519 translation Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a deformation control method and a system for a reserved structure after a joist is pulled out of a column, which solve the more special and stricter use requirements of a joist change structure system, such as large span, small section, large rigidity and small crack. The deformation control method of the reserved structure after the joist column is pulled out comprises the following steps: step one, arranging an enlarged cross-section beam below an original beam, wherein the original beam and the enlarged cross-section beam form a specific beam, the specific beam is positioned between a first upright post and a second upright post and penetrates through a third upright post, and the part of the third upright post positioned at the lower end of the enlarged cross-section beam is a dismantling section; step two, respectively arranging bracket on the first upright post and the second upright post, wherein the bracket is provided with a jack; thirdly, chiseling concrete on two sides of the specific beam on the basis of retaining the reinforcing steel bars; step four, lifting a jack, wherein the jack lifts the specific beam to be equivalent to the upper load of the third upright post, and the dismantling section is dismantled; and fifthly, re-pouring concrete at the joints of the two sides of the specific beam.
Description
Technical Field
The invention relates to the technical field of building structure reinforcement in civil engineering, in particular to a deformation control method and system of a reserved structure after joist column pulling.
Background
At present, the development of the building industry is changed from a large-scale new construction period to new construction, maintenance and reconstruction and a new period, some original buildings face reconstruction and reinforcement problems, and joist column replacement is widely applied as a better technical method for solving the problem of column spacing expansion. The joist column replacement is a general term for a roof truss column pulling, a joist wall removing and a joist column pulling, and is a comprehensive technique for implementing the dismantling, replacement and lengthening of a column under the condition of not dismantling or slightly dismantling an upper structure, and comprises a related structure reinforcing technique, an upper structure jacking technique, a column breaking technique and the like.
Compared with the traditional large cover lifting transformation, the joist column pulling method has the advantages of small influence on production and life, short transformation time, low cost and the like, and has the defects of higher technical requirements and careful safety measures.
Disclosure of Invention
The invention provides a deformation control method and a system for a reserved structure after a joist is pulled out of a column, which solve the more special and stricter use requirements of a joist change structure system, such as large span, small section, large rigidity and small crack.
The deformation control method of the reserved structure after the joist column is pulled out comprises the following steps:
step one, arranging an enlarged cross-section beam below an original beam, wherein the original beam and the enlarged cross-section beam form a specific beam, the specific beam is positioned between a first upright post and a second upright post and penetrates through a third upright post, and the part of the third upright post positioned at the lower end of the enlarged cross-section beam is a dismantling section;
step two, respectively arranging bracket on the first upright post and the second upright post, wherein a jack is arranged on the bracket;
thirdly, chiseling concrete on two sides of the specific beam on the basis of retaining the reinforcing steel bars;
step four, jacking the jack and dismantling the dismantling section;
and fifthly, re-pouring concrete on two sides of the specific beam.
Preferably, the beam with the enlarged cross section is a reinforced concrete beam.
Preferably, the corbels are welded at equal heights of the first upright post and the second upright post.
The invention also provides a deformation control system of the reserved structure after the joist is pulled out of the column, which comprises: the device comprises an original beam, an enlarged cross section beam, a first upright post, a second upright post, a third upright post, a bracket and a jack; wherein,,
the enlarged cross-section beam is positioned below the original beam;
the original beam and the beam with the enlarged cross section are positioned between the first upright post and the second upright post and penetrate through the third upright post, and the part of the third upright post positioned at the lower end of the beam with the enlarged cross section is a dismantling section;
the brackets are respectively positioned on the first upright post and the second upright post, each bracket is provided with a jack, and each jack is positioned below the beam with the enlarged section.
Preferably, the beam with the enlarged cross section is a reinforced concrete beam.
Preferably, the two brackets are respectively located at equal heights of the first upright post and the second upright post.
Preferably, the two brackets are welded to the first upright and the second upright respectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for controlling deformation of a reserved structure after a joist is pulled out of a column;
fig. 2 is a block diagram of a deformation control system of a reserved structure after a joist is pulled out of a column.
Detailed Description
The invention provides a deformation control method and a system for a reserved structure after a joist is pulled out of a column, which solve the more special and stricter use requirements of a joist change structure system, such as large span, small section, large rigidity and small crack.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the technical scheme of the deformation control method of the reserved structure after joist column pulling of the present invention includes:
the method specifically comprises the following steps: the original beam and the beam with the enlarged cross section form a specific beam, the specific beam is positioned between the first upright post and the second upright post and penetrates through the third upright post, and the part of the third upright post positioned at the lower end of the beam with the enlarged cross section is a dismantling section. The enlarged cross-section beam may be a reinforced concrete beam.
102, respectively arranging brackets on the first upright post and the second upright post, wherein jacks are arranged on the brackets;
the method specifically comprises the following steps: the two brackets are welded on the first upright post and the second upright post respectively, and the heights of the two brackets are consistent. A jack is arranged above the bracket and is used for jacking the specific beam.
in this embodiment, concrete is removed from two sides of the specific beam, and two sides of the specific beam are respectively close to the first upright and the second upright.
104, lifting the jack and dismantling the dismantling section;
in this embodiment, the jack lifts the particular beam to a load comparable to the upper load of the third column and then removes the removal section from the third column.
And 105, re-pouring concrete on two sides of the specific beam.
In this embodiment, two sides of the specific beam are respectively close to the first upright and close to the second upright.
The whole process of the joist column pulling construction process is required to be monitored. During the jacking of the broken column, it is necessary to monitor whether the column is translated, tilted or otherwise structurally altered. The construction adopts the method of combining manual and advanced electronic monitoring instruments and computers. When jacking, a staff gauge, a strain gauge and the like are arranged on the beam column, displacement and inclination conditions are monitored through high-precision electronic instruments, such as jacking quantity, structural deformation, the whole construction process and the like, monitoring records of all instruments are input into a computer, influence conditions of construction on the structure are determined through summarization, analysis and manual observation results of the computer, early warning is provided for structural deformation cracking, data support and basis are provided for construction and processing decision, and once problems are found, processing measures are timely taken to ensure safe construction. The electronic monitoring device that adopts includes:
(1) Crack width tester: the method is mainly used for detecting, recording and measuring the quantitative detection of the crack widths of the surface of the structure and the like.
(2) Electronic inclinometer: the instrument is installed at the two horizontal positions of the structure and the top of the supported structure, and the instrument has the functions of directly displaying angle values, measuring the angle range widely and quantitatively measuring the angle deviating from the horizontal plane direction by utilizing the technology of an MEMS acceleration sensor and adopting the technologies of signal acquisition, amplification, compensation and the like, wherein the longitudinal and transverse accuracy is 2 seconds.
(3) Electronic displacement meter: in jacking, it is mainly used for measuring the lifting or sinking amount of the structure during underpinning. The display screen is self-contained and can directly display the measured value. Parameters are modified through the menu in the lower column. The port may print data for a certain period of time directly in-situ with the printer.
(4) Static strain measurement system: the method can automatically, accurately, reliably and quickly measure the static strain stress values of multiple points in stress tests of large structures, models and materials. Force and pressure can be static to multiple points; physical quantities such as torque and displacement are measured.
The invention also provides a deformation control system of the reserved structure after the joist is pulled out of the column, which comprises: the beam comprises an original beam 1, an enlarged cross section beam 2, a first upright post 3, a second upright post 4, a third upright post 5, a bracket 6 and a jack 7; wherein,,
the enlarged cross-section beam 2 is positioned below the original beam 1, and the enlarged cross-section beam 2 can be a reinforced concrete beam;
the original beam 1 and the enlarged cross-section beam 2 are positioned between the first upright 3 and the second upright 4 and penetrate through the third upright 5, and a part 51 of the third upright 5 positioned at the lower end of the enlarged cross-section beam 2 is a dismantling section;
As shown by the thick black part in fig. 2, the concrete at both ends of the original beam 1 and the enlarged cross-section beam 2 is firstly partially chiseled, and the concrete is poured again after the jack 7 is lifted.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. A deformation control method of a reserved structure after joist column pulling is characterized in that,
step one, arranging an enlarged cross-section beam below an original beam, wherein the original beam and the enlarged cross-section beam form a specific beam, the specific beam is positioned between a first upright post and a second upright post and penetrates through a third upright post, and the part of the third upright post positioned at the lower end of the enlarged cross-section beam is a dismantling section;
step two, respectively arranging bracket on the first upright post and the second upright post, wherein a jack is arranged on the bracket;
thirdly, chiseling concrete on two sides of the specific beam on the basis of retaining the reinforcing steel bars;
step four, jacking the jack and dismantling the dismantling section;
fifthly, re-pouring concrete on two sides of the specific beam;
the beam with the enlarged cross section is a reinforced concrete beam;
the corbels are welded at equal heights of the first upright post and the second upright post;
the whole process of the joist column pulling construction must be monitored; in the jacking process of the broken column, whether the column is subjected to translation, inclination and other structural changes is monitored; the construction adopts a method of combining manual and advanced electronic monitoring instruments and computers; when jacking, a staff gauge and a strain gauge are arranged on the beam column, displacement and inclination condition monitoring is carried out on jacking quantity, structural deformation and the whole construction process through high-precision electronic instruments, monitoring records of all instruments are input into a computer, influence conditions of construction on the structure are determined through summarizing, analyzing and comparing manual observation results of the computer, early warning is provided for structural deformation cracking, data support and basis are provided for construction and processing decision, and once problems are found, processing measures are timely taken to ensure safe construction.
2. The utility model provides a deformation control system of reserved structure behind joist pulls out post which characterized in that includes: the device comprises an original beam, an enlarged cross section beam, a first upright post, a second upright post, a third upright post, a bracket and a jack; wherein,,
the enlarged cross-section beam is positioned below the original beam;
the original beam and the beam with the enlarged cross section are positioned between the first upright post and the second upright post and penetrate through the third upright post, and the part of the third upright post positioned at the lower end of the beam with the enlarged cross section is a dismantling section;
the brackets are respectively positioned on the first upright post and the second upright post, each bracket is provided with a jack, and each jack is positioned below the beam with the enlarged section;
the beam with the enlarged cross section is a reinforced concrete beam;
the two brackets are respectively positioned at equal heights of the first upright post and the second upright post;
the two brackets are welded on the first upright post and the second upright post respectively;
the deformation control system further includes: an electronic monitoring device;
the electronic monitoring equipment is used for monitoring the joist column pulling construction process;
the electronic monitoring device includes:
the crack width tester is used for detecting, recording and measuring quantitative detection of crack widths of the surface of the structure and the like;
the electronic inclinometer is used for installing the instrument at two horizontal positions of the structure and the top of the supported structure, and has the functions of directly displaying angle values, measuring the angle range widely and quantitatively measuring the angle deviating from the horizontal plane direction by utilizing the technology of an MEMS acceleration sensor and adopting the technology of signal acquisition, amplification and compensation, wherein the longitudinal and transverse precision is 2 seconds;
the electronic displacement meter is used for measuring the lifting or settlement of the structure during underpinning in jacking; the display screen is self-contained and can directly display the measured value; modifying parameters through a menu of a lower column; the port can directly connect with a printer to print data in a certain time period on site;
the static strain measurement system is used for automatically, accurately, reliably and rapidly measuring the static strain stress values of multiple points in stress tests of large structures, models and materials; the physical quantity of force, pressure, torque and displacement of the multi-point static state is measured.
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| CN201710237119.4A CN106836845B (en) | 2017-04-12 | 2017-04-12 | Deformation control method and system for reserved structure after joist column pulling |
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| CN201710237119.4A CN106836845B (en) | 2017-04-12 | 2017-04-12 | Deformation control method and system for reserved structure after joist column pulling |
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| CN106836845B true CN106836845B (en) | 2023-06-20 |
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| CN108678411B (en) * | 2018-06-06 | 2020-10-16 | 新兴铸管股份有限公司 | Method for replacing columns of supporting beams without dismantling factory building |
| CN109403654B (en) * | 2018-11-05 | 2021-03-26 | 广东赛力克建筑技术工程有限公司 | Underpinning and reinforcing method for existing building structure |
| CN109610881A (en) * | 2018-12-19 | 2019-04-12 | 中建三局第建设工程有限责任公司 | Prestressed girder underpins disconnected column construction method in a kind of existing tier building transformation |
| CN110259184B (en) * | 2019-07-02 | 2021-04-27 | 浙江众安建设集团有限公司 | Column pulling construction method based on joist and column pulling combined supporting and jacking system |
| CN112942885B (en) * | 2021-02-03 | 2022-08-30 | 浙江大陆建筑特种工程有限公司 | Building reinforcing structure and reinforcing method thereof |
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| JP4202892B2 (en) * | 2003-11-06 | 2008-12-24 | 住友林業株式会社 | Column removal beam reinforcement method and beam reinforcement structure in partition |
| CN103015743B (en) * | 2012-12-01 | 2015-11-04 | 中国建筑第七工程局有限公司 | A kind of steel work Removing Columns construction method |
| CN105781142B (en) * | 2016-04-26 | 2017-10-17 | 中南大学 | The ruggedized construction and reinforcement means of post are taken out for building structure top layer |
| CN206888561U (en) * | 2017-04-12 | 2018-01-16 | 广州市胜特建筑科技开发有限公司 | The Deformation control system of structure is reserved after Removing Columns |
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