CN102061746B - Steel structure assembled embedded part and construction method thereof - Google Patents
Steel structure assembled embedded part and construction method thereof Download PDFInfo
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- CN102061746B CN102061746B CN2010105656926A CN201010565692A CN102061746B CN 102061746 B CN102061746 B CN 102061746B CN 2010105656926 A CN2010105656926 A CN 2010105656926A CN 201010565692 A CN201010565692 A CN 201010565692A CN 102061746 B CN102061746 B CN 102061746B
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Abstract
The invention relates to a steel structure assembled embedded part and a construction method thereof, belonging to the technical field of building installation. The steel structure assembled embedded part comprises a plurality of embedded screws, the upper threaded parts of the embedded screws are jointly provided with a top template; the embedded screws are fixedly connected with the top template through clamping nuts 1 respectively positioned above the top template and packing nuts 1 positioned below the top template; the lower threaded parts of the embedded screws are jointly provided with a bottom template; the embedded screws are fixedly connected with the bottom template through clamping nuts 2 respectively positioned above the bottom template and packing nuts 2 positioned below the bottom template; the tail ends of the lower threaded parts of the embedded screws are provided with regulating bases, and the bottoms of the regulating bases are respectively fixed with embedded irons. The invention can decrease the work types of foundation construction, lower the technical requirements for construction, shorten the construction period and enable the foundation construction to have stable quality.
Description
Technical field
The present invention relates to a kind of steel work combination built-in fitting and job practices thereof, belong to the technical field of construction and installation.
Background technology
Conventional steel structure built-in fitting is two kinds on the built-in fitting group structure that constitutes of simple root pre embedded bolt structure and site welding technology fixing rack structure.The simple root pre embedded bolt is installed in reinforcement foundation construction back, and pre embedded bolt is connected on the basic main reinforcement through the auxiliary reinforcement overlap welding, and this fixed form at first can be destroyed basic main reinforcement structure; Secondly the screw thread of pre embedded bolt receives sweating heat, can influence the material material of pre embedded bolt; Moreover pre embedded bolt interference each other between meeting and the reinforcement foundation when installing, influence installation progress; Pre embedded bolt after also having the overlap joint welding fixing, its verticality and level height can not be adjusted arbitrarily; Last because the top of single lever-type pre embedded bolt is fixing not firm, poor stability produces distortion or displacement easily in template or concrete pouring construction, and installation accuracy is uncontrollable all the time.
Site welding technology fixing branch posture built-in fitting group, fixed support master material is an angle steel, construction is carried out before reinforcement installation; Be welded into angle steel the fixed support of certain size earlier, pre embedded bolt is fixed on the support then, forms rock-steady structure; This built-in fitting mode is significantly improved with preceding a kind of construction quality of comparing; But the support mode of this site welding technology: at first site welding technology support workload is big and complicated, poor stability, and the fixing back adjustment of support welding difficulty; Secondly welding is fixing between assembly welding support and the pre embedded bolt, makes pre embedded bolt not adjust surplus; Form complicacy by the assembly welding supporting structure again, member is more, has had a strong impact on the construction of follow-up reinforcement foundation and foundation forms, makes installation accuracy to guarantee.More than be two kinds of deficiency and drawbacks that steel work built-in fitting mode exists of tradition.Foundation construction plays crucial effects as the starting operation of steel building construction to follow-up construction.How to make that basic built-in fitting is quick for installation, precision is high, becomes the major issue of present steel building foundation construction.
Summary of the invention
The objective of the invention is to avoid the mutual crossed construction of inter process, improve the quality and the progress of mass-type foundation construction through improving the form of structure and the form of construction work of traditional steel work built-in fitting.A kind of steel work of the present invention combination built-in fitting and job practices thereof can reduce the foundation construction work post, reduce construction technical requirement, the reduction of erection time, and make the foundation construction steady quality.
For realizing above-mentioned purpose, the technical scheme that the present invention adopted is:
A kind of steel work combination built-in fitting comprises several pre embedded bolts; A top template is installed on the threaded portion, upper end of each pre embedded bolt jointly, is fixedly connected through the binding nut one that lays respectively at template top, top, the packing nut one that is positioned at template below, top between each pre embedded bolt and the top template; A bottom template is installed on the threaded portion, lower end of each pre embedded bolt jointly, and the binding nut two through laying respectively at template top, bottom between each pre embedded bolt and the bottom template, the packing nut two that is positioned at below the template of bottom are fixedly connected; Threaded portion, the lower end end of pre embedded bolt is equipped with the adjustment base, and each bottom of adjusting base is fixed with an embedded iron respectively.Embedded iron is a prior art, is made up of steel plate and anchor fluke.
As the further setting of such scheme, said adjustment base is provided with four, and is installed in respectively on the pre embedded bolt that is positioned at pin place, four limits.
Said adjustment base comprises the dull and stereotyped iron plate that is positioned at the bottom, is installed with a lengths of steel pipes with built-in screw thread on the upper surface of this flat board iron plate, and threaded portion, the lower end end of pre embedded bolt is screwed in the lengths of steel pipes.
Said pre embedded bolt bottom is in vacant state, and leaves the distance of 30-40mm between the steel plate upper surface of embedded iron.
A kind of job practices of steel work combination built-in fitting comprises the steps:
(1) smooth, the cleaning of foundation excavation, check and accept;
(2) foundation pad construction;
(3) embedded iron is installed: embedded iron is inserted in the blinding concrete, makes the steel plate upper surface of embedded iron concordant with the blinding concrete surface;
(4) line location;
(5) will adjust earlier on the steel plate that base is placed into embedded iron; Threaded portion, lower end end with corresponding pre embedded bolt is screwed in the lengths of steel pipes of adjustment base again; And the pre embedded bolt bottom is in vacant state, and leaves the distance of 30-40mm between the steel plate upper surface of embedded iron; On pre embedded bolt, be screwed into packing nut two then; Adjustment packing nut two makes the packing nut two on the pre embedded bolt be in unified level height; Then the bottom template is inserted in the pre embedded bolt; The bottom surface of template contacts with packing nut two fully up to the bottom; Binding nut two is installed is again clamped the bottom template with packing nut two; And then other pre embedded bolt is installed, adopt binding nut two and packing nut two to clamp the bottom template equally; Next packing nut one is installed; Packing nut one is positioned on the threaded portion, upper end of pre embedded bolt; Adjustment packing nut one makes the packing nut one on the pre embedded bolt be in unified level height; Then the top die sleeve-board is gone in the pre embedded bolt and contact fully, binding nut one is installed is again clamped the top template with packing nut one with packing nut one;
(6) reinforcement foundation is installed;
(7) foundation forms is installed;
(8) check adjustment built-in fitting group;
(9) base concrete is built;
(10) steel column base plate construction;
(11) basis completion maintenance.
Further setting as such scheme; Adopted steel column base plate adjustment built-in fitting in the said steel column base plate construction sequence; This steel column base plate adjustment built-in fitting comprises the cylinder of a band internal thread through hole; The bottom of this cylinder is equipped with balance plate, cooperates in the internal thread through hole of cylinder ball screw is installed.
Before the steel column base plate is installed, earlier with binding nut one, packing nut one, top form removable, again before base concrete does not solidify; The steel column base plate is adjusted the center that built-in fitting is inserted into the steel column base plate, also can be the center of combination built-in fitting usually, and the horizontal error that steel column base plate adjustment built-in fitting is installed is ± 20mm; Axis based error also is ± 20mm; This quality precision is less demanding, just can accomplish under the situation about estimating basically when therefore installing, and will protect the internal thread through hole of cylinder after the installation; Prevent the concrete construction pollution, cause screw thread to stop up or damage.
Ball screw is installed after the base concrete maintenance is intact again.Ball screw removes the sphere position, and other is the full thread rod member; The top is a hemispherical; The ball screw bottom is screwed in the internal thread through hole; Simultaneously through methods such as backguy or level measurements, the level height of adjustment ball screw makes the horizontal error of top and steel column base plate bottom surface of sphere in ± 2mm.The level height difference adjusting range of ball screw is ± 25mm.Then comprise going along with sb. to guard him with concrete of ball screw all around at steel column base plate adjustment built-in fitting, form the coagulation earth bastion, the sphere top of ball screw is a peak simultaneously; The steel column base plate is installed again, the steel column base plate is penetrated in the corresponding pre embedded bolt and descends gradually contacts with the end face of ball screw up to the bottom surface of steel column base plate and bear the steel column Bottom Pressure by balance plate; The suspension column nut all around of steel column base plate is installed at last.
The support of combination built-in fitting and ball screw has been arranged, and after steel column was basicly stable, the axial location of steel column and level height were confirmed; And can not adjust, but the verticality of steel column then can be accomplished through the degree of tightness of regulating steel column base plate suspension column nut all around; Because the centre-height of steel column base plate is constant during adjustment, in conjunction with instruments such as level gauges, adjustment work is very convenient; Avoided the conventional steel structural steel columns when the adjustment verticality; To the influence of steel column floor level height, this node mode has not only improved the disposable installation quality of steel column, and has improved the adjustment efficient of steel column especially.
A kind of steel work combination of the present invention built-in fitting is made up of a plurality of parts, and embedded iron is installed in the blinding concrete, divides with the combination built-in fitting and installs, but be inalienable part.The adjustment base of combination built-in fitting bottom, be weldingly fixed on the embedded iron during installation, form rock-steady structure (annotate: fixing must the inspecting for acceptance at whole combination built-in fittings of formal welding carried out after qualified).The adjustment base is made up of special component, and adjustment base bottom is an one flat plate iron plate, and dull and stereotyped iron plate is simultaneously welded one section (50-60mm) lengths of steel pipes with built-in screw thread.The adjustment position base is in four jiaos pre embedded bolt bottom in the combination built-in fitting, and connects with it, is inserted in the bottom template then from top, fixes bottom template and screw position with the nut group.The bottom template is that steel plate or other composite high-strength material are processed, and main effect is the bottom position and the spacing of fixing many preparatory screw rods.Then be inserted in the top template and also fix, so just formed complete novel combination built-in fitting group with the nut group.Top template and bottom template belong to same material and specification, and different is that the bottom template pours in construction in the concrete foundation, and the top template then disassembles after concreting, can reuse.After combination built-in fitting group installation and the acceptance(check), can carry out the construction of follow-up reinforcement foundation and foundation forms, then in the base concrete construction, wherein base plate adjustment base is installed at the top in the base concrete construction.
The composition material of whole combination built-in fitting is simpler, mainly by embedded iron, pre embedded bolt, adjustment base, nut group and up and down fixed form form, wherein steel column base plate adjustment base is a selectable unit (SU).Combination built-in fitting group can be assembled in factory in advance, also can arrive the job site and assemble, and assembly working is simple and convenient, and disposable especially completion is installed.Different with traditional simple root built-in fitting form of construction work, the combination built-in fitting is installed after the foundation pad construction, when blinding concrete is constructed; The bed course embedded iron is set; This construction can not produce with the construction of reinforcement foundation and foundation forms to be interfered, and measures and adjust very convenient, and this form of construction work is less demanding to the construction precision of blinding concrete; Basic controlling is in ± 20mm, and the adjusting range of combination built-in fitting itself is in ± 30mm.
A kind of steel work combination of the present invention built-in fitting is used for the foundation construction of steel building, has mainly solved the difficult problem of conventional steel structure built-in fitting in several broad aspect such as installing, adjust, fix.The present invention is fixed on many single lever-type pre embedded bolts of same steel column on the template through the bolt group, forms fixed structure, and this combination is Stability Analysis of Structures at first, and screw rod and template can not rocked arbitrarily; Secondly screw rod spacing is guaranteed by fixed form up and down, but level height can also be adjusted before concrete is not built; Have the combination built-in fitting directly to be fixed on the embedded iron of foundation pad again, fixing firmly simple, work progress is not interfered with reinforcement foundation and foundation forms each other; Make up the base concrete top pre-buried steel column base plate guiding mechanism of built-in fitting in addition, installation of being convenient to install and adjustment improve the installation quality and the installation effectiveness of steel column greatly.
In a word, a kind of steel work combination built-in fitting of the present invention and job practices thereof are carried out the monolithic assembling to steel work basis built-in fitting; Install and fix then, operation is independent, and is quick; And the effect steady quality, and efficient is high, and the combination built-in fitting can be in factory-assembled; Also can assemble at the construction field (site), assembly working is simple.Combined type built-in fitting and basis are connected firmly, and easy to adjust, have effectively improved steel work foundation construction efficient, and combination built-in fitting steady quality, have also improved the installation effectiveness of steel column.
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further.
Description of drawings
Fig. 1 is the elevational schematic view of a kind of steel work combination built-in fitting of the present invention in concrete;
Fig. 2 is the assembling sketch map of a kind of steel work combination of the present invention built-in fitting;
Fig. 3 is the schematic top plan view of top template among Fig. 2;
Fig. 4 is the elevational schematic view that is positioned at the embedded iron on the left side among Fig. 2;
Fig. 5 be among Fig. 2 four embedded irons distribution schematic diagram;
Fig. 6 is the structural representation of steel column base plate adjustment built-in fitting;
Fig. 7 is the structural representation of steel column base plate adjustment built-in fitting when being in the construction state;
Fig. 8 is a construction flow chart of the present invention.
The specific embodiment
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Figure 7ly be the structural representation of preferred embodiment of the present invention, a kind of steel work combination of the present invention built-in fitting comprises several pre embedded bolts 1; A top template 2 is installed on the threaded portion, upper end of each pre embedded bolt 1 jointly, is fixedly connected through binding nut one 2a that lays respectively at top template 2 tops, packing nut one 2b that is positioned at top template 2 belows between each pre embedded bolt 1 and the top template 2; A bottom template 3 is installed on the threaded portion, lower end of each pre embedded bolt 1 jointly, binding nut two 3a through laying respectively at template 3 tops, bottom between each pre embedded bolt 1 and the bottom template 3, be positioned at bottom packing nut two 3b of template 3 belows be fixedly connected; Threaded portion, the lower end end of pre embedded bolt 1 is equipped with adjustment base 4, and each bottom of adjusting base 4 is fixed with an embedded iron 5 respectively.Embedded iron 5 is made up of steel plate 51 and anchor fluke 52.
As the further setting of such scheme, adjustment base 4 is provided with four, and is installed in respectively on the pre embedded bolt 1 that is positioned at pin place, four limits.Adjustment base 4 comprises the dull and stereotyped iron plate 41 that is positioned at the bottom, is installed with a lengths of steel pipes 42 with built-in screw thread on the upper surface of this flat board iron plate 41, and threaded portion, the lower end end of pre embedded bolt 1 is screwed in the lengths of steel pipes 42.Pre embedded bolt 1 bottom is in vacant state, and leaves the distance of 30-40mm between steel plate 51 upper surfaces of embedded iron 5.
In conjunction with shown in Figure 8, a kind of job practices of steel work combination built-in fitting comprises the steps:
(1) smooth, the cleaning of foundation excavation, check and accept;
(2) foundation pad construction;
(3) embedded iron 5 is installed: embedded iron 5 is inserted in the blinding concrete 6, makes steel plate 51 upper surfaces of embedded iron 5 concordant with blinding concrete 6 surfaces;
(4) line location;
(5) will adjust earlier on the steel plate 51 that base 4 is placed into embedded iron 5; Threaded portion, lower end end with corresponding pre embedded bolt 1 is screwed in the lengths of steel pipes 42 of adjustment base 4 again; And pre embedded bolt 1 bottom is in vacant state, and leaves the distance of 30-40mm between steel plate 51 upper surfaces of embedded iron 5; On pre embedded bolt 1, be screwed into packing nut two 3b then; Adjustment packing nut two 3b make packing nut two 3b on the pre embedded bolt 1 be in unified level height; Then be inserted in bottom template 3 in the pre embedded bolt 1, the bottom surface of template 3 contacts with packing nut two 3b fully up to the bottom, binding nut two 3a is installed again clamps bottom template 3 with packing nut two 3b; And then other pre embedded bolt 1 is installed, adopt binding nut two 3a and packing nut two 3b to clamp bottom template 3 equally; Next packing nut one 2b is installed; Packing nut one 2b is positioned on the threaded portion, upper end of pre embedded bolt 1; Adjustment packing nut one 2b makes packing nut one 2b on the pre embedded bolt 1 be in unified level height; Be inserted in top template 2 in the pre embedded bolt 1 then and contact fully, binding nut one 2a is installed again clamps top template 2 with packing nut one 2b with packing nut one 2b;
(6) reinforcement foundation 7 is installed;
(7) foundation forms is installed;
(8) check adjustment built-in fitting group;
(9) base concrete 9 is built;
(10) steel column base plate 10 constructions;
(11) basis completion maintenance.
Wherein, Adopted steel column base plate adjustment built-in fitting in steel column base plate 10 construction sequences; This steel column base plate adjustment built-in fitting comprises the cylinder 12 of a band internal thread through hole 11, and the bottom of this cylinder 12 is equipped with balance plate 13, cooperates in the internal thread through hole 11 of cylinder 12 ball screw 14 is installed.
Before steel column base plate 10 is installed; Earlier binding nut one 2a, packing nut one 2b, top template 2 are removed, before base concrete 9 does not solidify, steel column base plate adjustment built-in fitting is inserted into the center of steel column base plate 10 again; Ball screw 14 is installed after base concrete 9 maintenances are intact again; Adjust the level height of ball screw 14 then, make the horizontal error of top and steel column base plate 10 bottom surfaces of sphere in ± 2mm, then steel column base plate adjustment built-in fitting comprise ball screw 14 around go along with sb. to guard him with concrete; Form the coagulation earth bastion, the sphere top of ball screw 14 is a peak simultaneously; Steel column base plate 10 is installed again, steel column base plate 10 is penetrated in the corresponding pre embedded bolt 1 and descends gradually contacts with the end face of ball screw 14 up to the bottom surface of steel column base plate 10 and bear steel column base plate 10 pressure by balance plate 13; The suspension column nut 15 all around of steel column base plate 10 is installed at last.The level height difference adjusting range of ball screw 14 is ± 25mm.
The present invention is for the steel column structure of different size and model, and the shape of steel column base plate, size etc. are also different, therefore makes up screw rod specification, quantity and fixed form specification, the shape of built-in fitting and also can correspondingly adjust.
The foregoing description only is used to the inventive concept of the present invention of explaining, but not to the qualification of rights protection of the present invention, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should fall into protection scope of the present invention.
Claims (7)
1. a steel work combination built-in fitting is characterized in that: comprise several pre embedded bolts; A top template is installed on the threaded portion, upper end of each pre embedded bolt jointly, is fixedly connected through the binding nut one that lays respectively at template top, top, the packing nut one that is positioned at template below, top between each pre embedded bolt and the top template; A bottom template is installed on the threaded portion, lower end of each pre embedded bolt jointly, and the binding nut two through laying respectively at template top, bottom between each pre embedded bolt and the bottom template, the packing nut two that is positioned at below the template of bottom are fixedly connected; Threaded portion, the lower end end of pre embedded bolt is equipped with the adjustment base, and each bottom of adjusting base is fixed with an embedded iron respectively.
2. a kind of steel work combination built-in fitting as claimed in claim 1, it is characterized in that: said adjustment base is provided with four, and is installed in respectively on the pre embedded bolt that is positioned at pin place, four limits.
3. according to claim 1 or claim 2 a kind of steel work combination built-in fitting; It is characterized in that: said adjustment base comprises the dull and stereotyped iron plate that is positioned at the bottom; Be installed with a lengths of steel pipes with built-in screw thread on the upper surface of this flat board iron plate, threaded portion, the lower end end of pre embedded bolt is screwed in the lengths of steel pipes.
4. a kind of steel work combination built-in fitting as claimed in claim 3, it is characterized in that: said pre embedded bolt bottom is in vacant state, and leaves the distance of 30-40mm between the steel plate upper surface of embedded iron.
5. the job practices of a steel work combination built-in fitting is characterized in that comprising the steps:
(1) smooth, the cleaning of foundation excavation, check and accept;
(2) foundation pad construction;
(3) embedded iron is installed: embedded iron is inserted in the blinding concrete, makes the steel plate upper surface of embedded iron concordant with the blinding concrete surface;
(4) line location;
(5) will adjust earlier on the steel plate that base is placed into embedded iron; Threaded portion, lower end end with corresponding pre embedded bolt is screwed in the lengths of steel pipes of adjustment base again; And the pre embedded bolt bottom is in vacant state, and leaves the distance of 30-40mm between the steel plate upper surface of embedded iron; On pre embedded bolt, be screwed into packing nut two then; Adjustment packing nut two makes the packing nut two on the pre embedded bolt be in unified level height; Then the bottom template is inserted in the pre embedded bolt; The bottom surface of template contacts with packing nut two fully up to the bottom; Binding nut two is installed is again clamped the bottom template with packing nut two; And then other pre embedded bolt is installed, adopt binding nut two and packing nut two to clamp the bottom template equally; Next packing nut one is installed; Packing nut one is positioned on the threaded portion, upper end of pre embedded bolt; Adjustment packing nut one makes the packing nut one on the pre embedded bolt be in unified level height; Then the top die sleeve-board is gone in the pre embedded bolt and contact fully, binding nut one is installed is again clamped the top template with packing nut one with packing nut one;
(6) reinforcement foundation is installed;
(7) foundation forms is installed;
(8) check adjustment built-in fitting group;
(9) base concrete is built;
(10) steel column base plate construction;
(11) basis completion maintenance.
6. the job practices of a kind of steel work combination built-in fitting as claimed in claim 5; It is characterized in that: adopted steel column base plate adjustment built-in fitting in the said steel column base plate construction sequence; This steel column base plate adjustment built-in fitting comprises the cylinder of a band internal thread through hole; The bottom of this cylinder is equipped with balance plate, cooperates in the internal thread through hole of cylinder ball screw is installed;
Before the steel column base plate is installed; With binding nut one, packing nut one, top form removable, before base concrete does not solidify, steel column base plate adjustment built-in fitting is inserted into the center of steel column base plate more earlier; Ball screw is installed after the base concrete maintenance is intact again; Adjust the level height of ball screw then, make the horizontal error of top and steel column base plate bottom surface of sphere in ± 2mm, then steel column base plate adjustment built-in fitting comprise ball screw around go along with sb. to guard him with concrete; Form the coagulation earth bastion, the sphere top of ball screw is a peak simultaneously; The steel column base plate is installed again, the steel column base plate is penetrated in the corresponding pre embedded bolt and descends gradually contacts with the end face of ball screw up to the bottom surface of steel column base plate and bear the steel column Bottom Pressure by balance plate; The suspension column nut all around of steel column base plate is installed at last.
7. the job practices of a kind of steel work combination built-in fitting as claimed in claim 6, it is characterized in that: the level height difference adjusting range of said ball screw is ± 25mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105656926A CN102061746B (en) | 2010-11-26 | 2010-11-26 | Steel structure assembled embedded part and construction method thereof |
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| CN2010105656926A CN102061746B (en) | 2010-11-26 | 2010-11-26 | Steel structure assembled embedded part and construction method thereof |
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| CN102061746A CN102061746A (en) | 2011-05-18 |
| CN102061746B true CN102061746B (en) | 2012-06-27 |
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| CN103362222B (en) * | 2013-07-05 | 2016-01-27 | 北京东方福霖大型楼板有限公司 | A kind of SP prestressed cored slab with bolt embedded part |
| CN104234070B (en) * | 2014-07-23 | 2016-08-17 | 杭州江润科技有限公司 | A kind of steel construction and the pre-buried attachment structure in basis and construction method |
| CN105986623A (en) * | 2015-03-02 | 2016-10-05 | 任丘市永基建筑安装工程有限公司 | Construction method for concrete embedded parts |
| CN105937267A (en) * | 2015-03-06 | 2016-09-14 | 蔡克铨 | Pre-buried module |
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| CN105525625A (en) * | 2016-01-19 | 2016-04-27 | 中建八局第三建设有限公司 | Construction method and device of pre-embedded bolts of fixed steel column base |
| CN107420689A (en) * | 2016-05-24 | 2017-12-01 | 江苏宜安建设有限公司 | A kind of integral combined column bolt fixture |
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| CN110939830A (en) * | 2019-10-25 | 2020-03-31 | 上海宝冶冶金工程有限公司 | Device and method for quickly prefabricating and fixing embedded bolt |
| CN111155549A (en) * | 2019-12-27 | 2020-05-15 | 绍兴宝城建筑工业化制造有限公司 | Construction method of steel structure combined embedded part |
| CN111081174B (en) * | 2020-03-03 | 2021-09-24 | 山东理工职业学院 | Steel structure billboard and construction method |
| CN111379272B (en) * | 2020-04-21 | 2024-06-18 | 上海电力设计院有限公司 | Control device and control method for elevation and levelness of embedded part |
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| CN112523536A (en) * | 2020-11-19 | 2021-03-19 | 浙江二十冶建设有限公司 | Method for rebuilding and planting reinforcement for existing building |
| CN114293664A (en) * | 2022-01-21 | 2022-04-08 | 中国建筑第八工程局有限公司 | Quick installation process for ultrahigh-precision embedded part group |
| CN115012436B (en) * | 2022-04-28 | 2023-03-24 | 浙江中天恒筑钢构有限公司 | Reverse-sequence construction method for raft foundation with steel structure embedded column base |
| CN114960733A (en) * | 2022-06-09 | 2022-08-30 | 兖矿东华建设有限公司三十七处 | Double-layer combined positioning template capable of accurately positioning in centering manner for embedded bolt and use method of double-layer combined positioning template |
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