CN206769200U - First wear formula post stretching vertical prestressing cast-in-place concrete rod structure - Google Patents

First wear formula post stretching vertical prestressing cast-in-place concrete rod structure Download PDF

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Publication number
CN206769200U
CN206769200U CN201720279931.9U CN201720279931U CN206769200U CN 206769200 U CN206769200 U CN 206769200U CN 201720279931 U CN201720279931 U CN 201720279931U CN 206769200 U CN206769200 U CN 206769200U
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steel plate
annular
steel
anchored
interlocking
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吴金兴
吴晓斌
吴晓峰
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SHENZHEN FUTIAN JIANAN CONSTRUCTION GROUP Co Ltd
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SHENZHEN FUTIAN JIANAN CONSTRUCTION GROUP Co Ltd
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Abstract

It the utility model is related to one kind and first wear formula post stretching vertical prestressing cast-in-place concrete rod structure, it is characterised in that mainly including cylinder, separate combination type armored concrete prefabricated section anchored end supporting construction, steel pipe and the presstressed reinforcing steel in steel pipe;Integral annular supporting steel plate, Extrusion anchor ground tackle and integral annular fixation steel plate are sequentially provided with above separate combination type armored concrete prefabricated section anchored end supporting construction, presstressed reinforcing steel bottom is provided with spiral bar at anchored end;Grout hole and standby grout hole are provided with cylinder.The utility model supporting steel plate, fixation steel plate use annular monoblock type steel plate, overall structure is stable, has good security performance, entirety is linked as using upper and lower interlocking-type doughnut-shaped steel plate, so that pre-stressing tendon forms a stress entirety, the stress performance of presstressed reinforcing steel is greatly improved.

Description

First wear formula post stretching vertical prestressing cast-in-place concrete rod structure
Technical field
It the utility model is related to one kind and first wear formula post stretching vertical prestressing cast-in-place concrete rod structure, suitable for post stretching The construction of vertical prestressing cast-in-situ concrete columns.
Background technology
As China started popularization prestressed reinforced concrete construction in 1956.Prestressed structure has stepped on China's architectural history The years of over half a century are spent.Particularly since the 1980s, prestressed reinforced concrete construction starts to be widely used in The modern projects such as large public building, executive information systems, Longspan Bridge and multi storied industrial factory building.By more than 50 years Make great efforts to explore, design theory, computational methods, component series, structural system, stretch-draw anchor body of the China in prestressed concrete System, prestressing techniques, presstressed reinforcing steel and concrete material etc., a set of unique system is formed;In prestressed concrete In terms of construction technology and the construction management of soil, abundant experience is have accumulated, and achieve good economic benefit and society Benefit.
Cast-in-place post stretching bonded prestressed concrete technology is by pre-buried pipeline, wears the processes such as muscle, tensioning, grouting and be Concrete structure establishes prestressing force to meet design requirement.Cast-in-place concrete structure horizontal direction pre-stress construction passes through permanent Practice, has become the construction technology of a comparative maturity, is mainly used in some large-scale large span public buildings.In recent years, With the continuous change of large public building design form, the country has engendered the public affairs that a collection of roofing is super-span steel construction To build together and build, steel construction both ends bearing is typically designed to super-section frame column buttress, and applies to there is cohesive vertical prestressing, from And realize and save space, cost is reduced, shortens the duration, improves the purpose of economic benefit of engineering and social benefit.Fully development With a new problem for using vertical prestressing framework rod structure being building technology research and extension.
In summary, the Research Prospects of prestressed in-situ depositing concrete column are wide, have good economic technology benefit, herein Aspect carries out technical research, it will obtains good innovation achievement.In consideration of it, a kind of bright new super-section frame is sent out at present Trestle post stretching has cohesive vertical prestressing structure construction technique, can be widely applied to be designed with vertical prestressing structural construction In construction.Post stretching is set to have cohesive vertical prestressing to have cohesive vertical prestressing with concrete structure connecting structure and post stretching Construct the cable tensios control of itself, control post stretching has being connected firmly, reliably for cohesive vertical prestressing and frame column, controls post-tensioning Method has a compatible deformation of cohesive vertical prestressing and frame column concrete structure, ensure super-section frame column bear it is horizontal to Post stretching can be made full use of to have cohesive vertical prestressing to be applied to concrete structure level to reaction force during thrust, Make moment of flexure effect caused by super-section frame column overall deformation smaller, avoid ftractureing.
The content of the invention
The purpose of this utility model is that providing one kind first wears formula post stretching vertical prestressing cast-in-place concrete rod structure, can To be widely used in being designed with the construction of vertical prestressing structural construction.
To realize above-mentioned technical purpose, the utility model employs following technical scheme:
One kind first wear formula post stretching vertical prestressing cast-in-place concrete rod structure, it is characterised in that mainly including cylinder, point From Combined reinforced concrete prefabricated section anchored end supporting construction, steel pipe and the presstressed reinforcing steel in steel pipe;Separate combination type Integral annular supporting steel plate, Extrusion anchor ground tackle and entirety are sequentially provided with above armored concrete prefabricated section anchored end supporting construction Formula annular fixation steel plate, presstressed reinforcing steel bottom are provided with spiral bar at anchored end;Grout hole and standby filling are provided with cylinder Starch hole.
Further, the separate combination type armored concrete prefabricated section anchored end supporting construction is by concrete, passage Being formed with integral annular supporting steel plate, integral annular supporting steel plate is fixed on concrete by pre embedded bolt and nut, Passage is located at the middle part of concrete.
Fixed between the steel pipe of separation using upper and lower interlocking-type doughnut-shaped steel plate, upper and lower interlocking-type doughnut-shaped steel plate is interlocked by annular Lower steel plate and annular interlocking upper steel plate composition;Annular interlocking lower steel plate is provided with steel pipe through hole and for connecting cylinder steel The bar dowel of muscle, annular interlocking upper steel plate is provided with rivet through hole, between annular interlocking lower steel plate and annular interlocking upper steel plate It is fixedly connected with rivet.
Post stretching vertical prestressing cast-in-place concrete column construction method, its main construction procedure are as follows:
1)Preparation:Carry out presstressed reinforcing steel, the processing of split heads and the colligation of regular reinforcement;
2)Prefabricated anchored end supporting construction installation:
Bottom concrete post is constructed using first threading method, i.e., installs separate combination type armored concrete prefabricated section anchor in the soleplate Fixed end supporting construction;Separate combination type armored concrete prefabricated section anchored end supporting construction includes concrete, passage and entirety Formula annular brace steel plate, integral annular supporting steel plate is fixed on concrete by pre embedded bolt and nut, in concrete Portion is provided with passage, and bottom, which is provided with, to be used to shelve groove by the reinforcing bar of baseplate reinforcing bar;It is prefabricated in separate combination type armored concrete Be sequentially arranged above integral annular supporting steel plate, Extrusion anchor ground tackle and the integral annular of block anchored end supporting construction fix steel Plate;
Floor gap cylinder is constructed using rear threading method, installs anchored end under prefabricated section first, and steel plate casts anchor installed in prefabricated section The top of fixed end, steel plate are connected by screw rod with cylinder;
3)Lay prestress pipe, presstressed reinforcing steel:
Constructed for first threading method:Steel pipe is installed first, fixed between the steel pipe of separation using upper and lower interlocking-type doughnut-shaped steel plate, The interlocking-type doughnut-shaped steel plate up and down is made up of annular interlocking lower steel plate and annular interlocking upper steel plate;Set on annular interlocking lower steel plate There is steel pipe through hole and for connecting the bar dowel of cylinder reinforcing bar, annular interlocking upper steel plate is provided with rivet through hole, annular It is fixedly connected between interlocking lower steel plate and annular interlocking upper steel plate with rivet;Then presstressed reinforcing steel is laid, and arranges standby grouting Hole and grout hole;
Constructed for rear threading method, steel pipe, spiral bar are installed first, steel pipe is divided into straight tube and bend pipe two using inflection point as boundary Part, then lay presstressed reinforcing steel;
4)Presstressed reinforcing steel is fixed:Presstressed reinforcing steel is fixed at anchored end by spiral bar;
5)Stretching end form for seal:Stretching end pre-sets reserved notch, filling to be tensioned in framework capital using built-in After slurry terminates, reinforcement welding and concrete enclosing are carried out;
6)Concreting:Formwork erection after-pouring column body concrete;
7)Anchorage cable stretching, grouting and sealing off and covering anchorage:It can carry out duct grouting after the completion of tensioning, successively enter from bottom to top during grouting Row mends slurry to ensure the density of grouting, sealing off and covering anchorage after the completion of tensioning until carrying out secondary gravity at the top of frame column, after the completion of grouting.
The utility model has the characteristics of following and beneficial effect:
(1)First wear formula construction and prestressing tendon is penetrated into embedded steel tube before frame column concreting, easy for construction, not shadow Ring the structure duration.
(2)First wear formula Construction Support steel plate, fixation steel plate and use annular monoblock type steel plate, overall structure is stable, has Good security performance.
(3)Interlocking-type doughnut-shaped steel plate is linked as entirety up and down for first threading method positioning steel tube use so that pre-stressing tendon is formed One stress entirety, greatly improve the stress performance of presstressed reinforcing steel.
(4)First threading method bottom uses band hole slot prefabricated section support, compared to Steel bar rack have good globality and by Power performance.
(5)Prefabricated section is provided with passage, reinforcing bar shelves groove, convenient construction, and concrete pouring quality also greatly improves.
Brief description of the drawings
Fig. 1 is first threading method prestressed concrete column structural map;
Fig. 2 is rear threading method prestressed concrete column structural map;
Fig. 3 is separate type interlocking lower steel plate schematic diagram;
Fig. 4 is separate type interlocking upper steel plate schematic diagram;
Fig. 5 is separate type interlocking doughnut-shaped steel plate schematic diagram;
Fig. 6 is separate combination type armored concrete prefabricated section anchored end supporting construction schematic diagram;
Fig. 7 is tensioning end structure schematic diagram;
Fig. 8 is the utility model construction flow chart.
In figure:1- cylinders, the standby grout holes of 2-, 3- grout holes, 4- presstressed reinforcing steels, 5- steel pipes, 6- spiral bars, 7- monoblock types Annular fixation steel plate, 8- Extrusion anchor ground tackles, 9- integral annular supporting steel plates, 10- separate combination type armored concrete prefabricated section anchors Fixed end supporting construction, 11- anchored ends, 12- straight tubes, 13- inflection points, 14- bend pipes, anchored end under 15- prefabricated sections, 16- are mutual up and down Locking-type doughnut-shaped steel plate, 17- annular interlocking lower steel plates, 18- annular interlocking upper steel plates, 19- steel pipe through holes, 20- bar dowels, 21- Rivet through hole, 22- rivets, 23- steel plates, 24- screw rods, 25- pre embedded bolts, 26- nuts, 27- passages, 28- reinforcing bars are shelved Groove, 29- concrete.
Embodiment
The making requirement of prefabricated section, reinforcement welding construction technology, tensioning construction operational procedure in present embodiment Etc. repeating no more, emphasis illustrates the embodiment for the post stretching vertical prestressing cast-in-situ concrete columns that the utility model is related to.
Fig. 1 is first threading method prestressed concrete column structural map;Fig. 2 is rear threading method prestressed concrete column structural map;Fig. 3 is Separate type interlocks lower steel plate schematic diagram;Fig. 4 is separate type interlocking upper steel plate schematic diagram;Fig. 5 is that separate type interlocking doughnut-shaped steel plate shows It is intended to;Fig. 6 is separate combination type armored concrete prefabricated section anchored end supporting construction schematic diagram;Fig. 7 is that tensioning end structure shows It is intended to;
First threading method prestressed concrete column structural map as shown in Figure 1, mainly include cylinder 1, separate combination type reinforcing bar mixes Solidifying native prefabricated section anchored end supporting construction 10, steel pipe 5 and the presstressed reinforcing steel 4 in steel pipe 5;Separate combination type armored concrete The top of prefabricated section anchored end supporting construction 10 is sequentially provided with integral annular supporting steel plate 9, Extrusion anchor ground tackle 8 and integral annular Fixation steel plate 7, the bottom of presstressed reinforcing steel 4 are provided with spiral bar 6 at anchored end 11;Grout hole 3 and standby filling are provided with cylinder 1 Starch hole 2.
Rear threading method prestressed concrete column structural map as shown in Figure 2, mainly include anchored end 15, steel plate under prefabricated section 23rd, steel pipe 5 and the presstressed reinforcing steel 4 in steel pipe 5;Steel plate 23 is arranged on the top of anchored end 15 under prefabricated section, and passes through spiral shell Bar 24 is connected with cylinder;Presstressed reinforcing steel 4 is fixed on anchored end 15 under prefabricated section through steel plate 23, and the bottom of presstressed reinforcing steel 4 is provided with Spiral bar 6.Anchor cable fixing device includes steel pipe 4 and spiral bar 6;Steel pipe is divided into straight tube 12, bend pipe 14, and the two is with inflection point 13 Boundary.
As in Figure 3-5, fixed between the steel pipe 5 of separation using upper and lower interlocking-type doughnut-shaped steel plate 16, upper and lower interlocking-type ring Shape steel plate 16 is made up of annular interlocking lower steel plate 17 and annular interlocking upper steel plate 18;Annular interlocking lower steel plate 17 passes through provided with steel pipe Perforation 19 and for connecting the bar dowel 20 of cylinder reinforcing bar, annular interlocking upper steel plate 18 is provided with rivet through hole 21, annular It is fixedly connected between interlocking lower steel plate 17 and annular interlocking upper steel plate 18 with rivet 22.
Separate combination type armored concrete prefabricated section anchored end supporting construction as shown in Figure 6, including concrete 29, ventilation Hole 27 and integral annular supporting steel plate 9, integral annular supporting steel plate 9 are fixed on coagulation by pre embedded bolt 25 and nut 26 On soil 29, passage is located at the middle part of concrete 29.Separate combination type armored concrete prefabricated section anchored end supporting construction bottom It is provided with for shelving groove 28 by the reinforcing bar of baseplate reinforcing bar.
As shown in figure 8, the construction procedure of post stretching vertical prestressing cast-in-situ concrete columns is as follows:
1)Preparation:Carry out presstressed reinforcing steel 4, the processing of split heads and the colligation of regular reinforcement.
2)Prefabricated anchored end supporting construction installation:
Bottom concrete post is constructed using first threading method, i.e., installs separate combination type armored concrete prefabricated section anchor in the soleplate Fixed end supporting construction 10;Separate combination type armored concrete prefabricated section anchored end supporting construction includes concrete 29, passage 27 With integral annular supporting steel plate 9, integral annular supporting steel plate 9 is fixed on concrete 29 by pre embedded bolt 25 and nut 26 On, the middle part of concrete 29 is provided with passage 27, and bottom, which is provided with, to be used to shelve groove 28 by the reinforcing bar of baseplate reinforcing bar;In separation group Box-like armored concrete prefabricated section anchored end supporting construction 10 is sequentially arranged above integral annular supporting steel plate 9, extruding anchor Tool 8 and integral annular fixation steel plate 7;
Floor gap cylinder is constructed using rear threading method, installs anchored end 15 under prefabricated section first, and steel plate 23 is arranged on prefabricated section The top of lower anchored end 15, steel plate 23 are connected by screw rod 24 with cylinder.
Using tilting notch way, fixing end is anchored using strand tapered anchorage.Set in the side of super-section frame column Triangular notch or rectangular block are put, the embedded steel tube in cylinder, treats to wear presstressed reinforcing steel again after the completion of frame column concreting, When concrete strength reaches design requirement, tensioning and grouting are carried out.In view of the needs attractive in appearance of facade, vee gutter Mouth is arranged in frame column.This way framework post part cage bar needs to disconnect, and grouting to be tensioned carries out recovery processing after terminating.
3)Lay prestress pipe, presstressed reinforcing steel:
Constructed for first threading method, steel pipe 5 is installed first, upper and lower interlocking-type doughnut-shaped steel plate 16 is used between the steel pipe 5 of separation Fixed, upper and lower interlocking-type doughnut-shaped steel plate 16 is made up of annular interlocking lower steel plate 17 and annular interlocking upper steel plate 18.Fastener for connection is adopted With the form of adjunction sleeve pipe, casing length 100mm, connector is wound with mackintosh and sealed using electric welding full weld.Weld seam Need continuously to avoid spillage from causing duct to block.Annular interlocking lower steel plate 17 is provided with steel pipe through hole 19 and for connecting The bar dowel 20 of cylinder reinforcing bar, annular interlocking upper steel plate 18 are provided with rivet through hole 21, annular interlocking lower steel plate 17 and annular It is fixedly connected between interlocking upper steel plate 18 with rivet 22.Then presstressed reinforcing steel 4 is laid, and arranges standby grout hole 2, grout hole 3.
For rear threading method, steel pipe 4, spiral bar 6 are installed, steel pipe is divided into straight tube 12, bend pipe 14, and the two is with inflection point 13 Boundary.
4)Presstressed reinforcing steel is fixed:Presstressed reinforcing steel 4 is fixed at anchored end 11 by spiral bar 6.Fixing end uses extruding anchor Tool, and steel plate is set in favor of the uniform force of presstressed reinforcing steel, the steel plate bottom steel reinforcement cage branch of Ф 32 in the bottom of Extrusion anchor ground tackle Support.Duct uses steel pipe pore-creating, and grout hole uses the steel pipes of Ф 20 and steel-pipe welding firm.Set and be in the milk in prestressing tendon fixing end Hole, or the grout hole using anchor portion, and 2~3 grout holes are set in duct middle section, each grout hole is on flooring Portion about 300mm position.Grout hole is firm using the steel pipes of Φ 20 and steel-pipe welding.The advantages of the method, is to reduce due to height Grouting pressure is lost caused by degree influences, it is ensured that the density in duct.
5)Stretching end form for seal:Stretching end pre-sets reserved 300x300mm grooves in framework capital using built-in Mouthful, groove depth about 150mm is reserved, after grouting to be tensioned terminates, carries out reinforcement welding and concrete enclosing.
6)Concreting:Formwork erection after-pouring column body concrete.
7)Anchorage cable stretching, grouting and sealing off and covering anchorage:Tensioning is high using YCW-400 types and YCW-250 types jack and ZB-800 types Pressure oil pump.Duct grouting can be carried out after the completion of tensioning.Successively carried out from bottom to top until at the top of frame column during grouting.Grouting is adopted With 52.5 ordinary portland cements, filling intensity >=M35.Secondary gravity should be carried out after the completion of grouting and mends slurry to ensure the density of grouting, Sealing off and covering anchorage after the completion of tensioning.

Claims (3)

1. one kind first wears formula post stretching vertical prestressing cast-in-place concrete rod structure, it is characterised in that mainly including cylinder(1), point From Combined reinforced concrete prefabricated section anchored end supporting construction(10), steel pipe(5)With located at steel pipe(5)Interior presstressed reinforcing steel (4);Separate combination type armored concrete prefabricated section anchored end supporting construction(10)Top be sequentially provided with integral annular support Steel plate(9), Extrusion anchor ground tackle(8)With integral annular fixation steel plate(7), presstressed reinforcing steel(4)Bottom is close to anchored end(11)Place's peace Equipped with spiral bar(6);Cylinder(1)It is interior to be provided with grout hole(3)With standby grout hole(2).
2. according to claim 1 first wear formula post stretching vertical prestressing cast-in-place concrete rod structure, it is characterised in that institute State separate combination type armored concrete prefabricated section anchored end supporting construction(10)By concrete(29), passage(27)And monoblock type Annular brace steel plate(9)Composition, integral annular supporting steel plate(9)Pass through pre embedded bolt(25)And nut(26)It is fixed on coagulation Soil(29)On, passage(27)Located at concrete(29)Middle part.
3. according to claim 1 first wear formula post stretching vertical prestressing cast-in-place concrete rod structure, it is characterised in that point From steel pipe(5)Between use upper and lower interlocking-type doughnut-shaped steel plate(16)It is fixed, upper and lower interlocking-type doughnut-shaped steel plate(16)By annular mutual Lock lower steel plate(17)Upper steel plate is interlocked with annular(18)Composition;Annular interlocking lower steel plate(17)It is provided with steel pipe through hole(19)、 And for connecting the bar dowel of cylinder reinforcing bar(20), annular interlocking upper steel plate(18)It is provided with rivet through hole(21), annular Interlock lower steel plate(17)Upper steel plate is interlocked with annular(18)Between use rivet(22)It is fixedly connected.
CN201720279931.9U 2017-03-22 2017-03-22 First wear formula post stretching vertical prestressing cast-in-place concrete rod structure Active CN206769200U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100322A (en) * 2017-03-22 2017-08-29 深圳市福田建安建设集团有限公司 Post stretching vertical prestressing cast-in-place concrete rod structure and construction method
CN110725545A (en) * 2019-09-06 2020-01-24 北京市第三建筑工程有限公司 High-pressure grouting construction structure and construction method for embedded end of precast concrete column

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100322A (en) * 2017-03-22 2017-08-29 深圳市福田建安建设集团有限公司 Post stretching vertical prestressing cast-in-place concrete rod structure and construction method
CN110725545A (en) * 2019-09-06 2020-01-24 北京市第三建筑工程有限公司 High-pressure grouting construction structure and construction method for embedded end of precast concrete column

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