CN104314008A - Beam bottom longitudinal and horizontal slope self-leveling structure and construction method of beam bottom longitudinal and horizontal slope self-leveling structure - Google Patents
Beam bottom longitudinal and horizontal slope self-leveling structure and construction method of beam bottom longitudinal and horizontal slope self-leveling structure Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
The invention discloses a beam bottom longitudinal and horizontal slope self-leveling structure and a construction method of the beam bottom longitudinal and horizontal slope self-leveling structure. The beam bottom longitudinal and horizontal slope self-leveling structure comprises a base, a pad disc, a support mechanism and a slurry pressing mechanism, wherein the support mechanism comprises a screw stud and a sleeve connected with the screw stud through screw threads, the sleeve is arranged on the base, in addition, a slurry outlet hole is formed in the lower side of the sleeve in advance, the screw stud consists of a screw cap and a screw rod, the top surface of the screw cap is a spherical convex surface, the pad disc is pre-buried at the bottom of a beam plate, the bottom surface of the pad disc is a spherical concave surface and is matched with the screw cap, the slurry pressing mechanism comprises a side mold, a slurry outlet pipe and a slurry injecting pipe, and the base is used a bottom mold of the slurry pressing mechanism. The beam bottom longitudinal and horizontal slope self-leveling structure and the construction method have the advantages that the spherical concave surface and the spherical convex surface with the same curvature are adopted as temporary supports, when longitudinal and horizontal slopes of a beam body change, and the automatic sliding is realized by unbalanced force generated by the initial point contact for reaching the integral support of the spherical surface; the total height of the support mechanism is adjustable, after the whole hole beam plate erection is completed, the dynamic regulation can be realized, the smoothness of beam plate connection is improved, the stress uniformity of a support seat is improved, the structure integrality of a bridge is improved, and the service life of the support seat is prolonged.
Description
Technical field
The invention belongs to technical field of bridge engineering, to be specifically related at the bottom of a kind of beam slope self-level(l)ing structure and construction method thereof in length and breadth.
Background technology
Leveling block at the bottom of pre-cast hollow slab beam is an important construction measure, to ensure that Bearing Seat Force is even, extends bearing application life, and ensures that Installation of beam slab is smooth-going, guarantee that beam slab entirety is stressed.Common type is: concrete correcting wedge.
According to bridge design code requirement, when bridge longitudinal gradient is greater than 1%, take measures at the bottom of Ying Liang, make bearing maintenance level, namely need to arrange fore-and-aft leveling structure; And bridge generally all needs to arrange horizontal wall inscription, for making the horizontal maintenance level of bearing, also need to carry out side leveling simultaneously.Current domestic project practice all adopts concrete correcting wedge structure: namely when beam slab is prefabricated, a support position synchronously cast-in-place wedge protruded at the bottom of beam.The height hi that wedge four angle points protrude soffits determines according to slope in length and breadth, i.e. hi=h0 ± a × i
vertical% ± b × i
horizontal%, wherein h0 is bearing central point protrusion height, and a is that wedge indulges bridge to width, and b is wedge direction across bridge width.Visible when slope changes in length and breadth, the height of wedge four angle points needs corresponding adjustment.And in Practical Project, bridge often across slope in length and breadth all may change, such beam heelpiece tile height need at any time adjustment.
Beam slab is prefabricated on base, because wedge protrudes soffit, needs on base, offer corresponding wedge shape notch, and when wedge change in size, the notch on base also wants corresponding adjustment.And base is generally on cement concrete constructions and lays steel bed die, the workload of frequent adjustment notch is very big, and the precision also more difficult control implemented.So in engineering practice in the past, part engineering does not adjust wedge height in time, and adopt unified wedge, horizontal or longitudinal discrepancy in elevation is there is after result in beam slab erection, thus have impact on the globality of structure, deck paving local thickness is partially thick or partially thin, causes the multiple diseases such as bridge surface mangle.
Therefore, to be necessary to improve at the bottom of existing beam slope leveling structure in length and breadth, exploitation is a kind of can self adaptation slope change in length and breadth, and implement succinct, precision is controlled, guarantees the leveling structure of structure stress.
Summary of the invention
For the above-mentioned technical problem existing for prior art, to the invention provides at the bottom of a kind of beam slope self-level(l)ing structure and construction method thereof in length and breadth, it adopts rational combination to optimize structure structure, improves efficiency of construction and construction precision, thus improves bridge application life.
Slope self-level(l)ing structure in length and breadth at the bottom of a kind of beam, comprising: base, disc, supporting mechanism and mud jacking mechanism; The sleeve pipe that described supporting mechanism comprises stud and is threaded with it, described sleeve pipe to be located on base and to be had slurry outlet in advance on the downside of sleeve pipe, and described stud is connected to form by nut and screw rod, and nut end face is spherical convex surface;
Described disc is embedded in bottom beam slab in advance, and its end face is horizontal plane, and bottom surface is spherical concave surface and coordinates with nut; Due to slope impact in length and breadth, and the error effect of location, the center of two spheres not on a plumb line, therefore when beam heelpiece dribbling shape concave surface just contacts with the spherical convex surface of nut, is a point cantact on off-centered sphere; Point cantact on sphere produces horizontal and vertical horizontal force, make supporting mechanism respect thereto generation slippage, it is final when nut convex surface and the spherical concave surface of disc fit like a glove, supporting mechanism is in self-balancing stable state, realize the self-level(l)ing on beam body slope in length and breadth, and contact owing to being that sphere is overall, therefore beam body and screw rod uniform force can be ensured, can ensure that Bearing Seat Force is even.
Described mud jacking mechanism comprises side form, outlet pipe and Grouting Pipe, and described base forms tubular structure as the bed die of mud jacking mechanism and side form, makes described supporting mechanism be positioned at this tubular structure; Described outlet pipe and Grouting Pipe are opened in the upper side and lower side of side form respectively.
Preferably, described nut end face is pasted with rubber pad; Sphere can be improved stressed.
Described disc and supporting mechanism all adopt steel matter, can in factory batch micro operations.
Preferably, described disc end face is welded with reinforcing bar; Its local pressure can be disperseed, strengthen it and be connected with concrete.
Preferably, be adhesive with one deck tetrafluoro slide plate between described sleeve pipe and base, tetrafluoro slide plate has slurry outlet in advance; Ensure planar can slide arbitrarily between supporting mechanism.
Preferably, described side form adopts bellows-like structure; Height adjustable, can be self-enclosed with beam body under pressure effect.
The end face of described base and side all have slurry outlet and two place's slurry outlets are communicated with, and wherein the slurry outlet of side is aimed at described Grouting Pipe.
The overall height of described supporting mechanism is by executing stubborn stud or sleeve pipe realizes dynamic conditioning.
Agent structure of the present invention (base, supporting mechanism and mud jacking mechanism) is installed on the bearing of pier, and disc is embedded in beam slab inside in advance, has no effect to prefabrication of beam; By mud jacking, can realize by the transformation of steel beam column temporary support to buckling compute steel-concrete composite structure permanent support.
The construction method of slope self-level(l)ing structure in length and breadth at the bottom of above-mentioned beam, concrete steps are as follows:
(1) when beam slab is prefabricated, described disc is embedded in bottom beam slab in advance;
(2) erection support on pier, and then described base and supporting mechanism are installed on bearing, and by executing stubborn stud or sleeve pipe adjustment support overall height;
(3) set up beam slab, position beam slab being embedded into disc is aimed at support position, by disc concave surface and nut convex surface self-adaptative adjustment to realize spherical support;
(4) the mud jacking mechanism described in installation, and inject slurries by Grouting Pipe, overflow from outlet pipe after the confined space surrounded by side form fills up by slurries, after grout cures, namely define the permanent support structure of steel-concrete combination.
The present invention has following Advantageous Effects:
(1) the present invention adopts with the spherical concave surface of curvature and convex surface as temporary support, beam body in length and breadth slope change time, the out-of-balance force produced by initial point cantact realizes automatic sliding, to reach the integrated support of sphere.
(2) overall height of supporting mechanism of the present invention is adjustable, after whole hole beam slab has set up, can realize dynamic conditioning, improves the smooth degree that beam slab connects, improves the uniformity of Bearing Seat Force, improves the application life of bridge construction globality and bearing.
(3) the present invention is for the identical beam slab across footpath, no matter how slope changes in length and breadth, all steel beam column are all applicable, can realize factory's mass production.
Accompanying drawing explanation
Fig. 1 is the structural representation of self-level(l)ing structure of the present invention.
Fig. 2 is the structural representation of disc.
Fig. 3 is the structural representation of supporting mechanism.
Fig. 4 is the structural representation of base.
Fig. 5 is the structural representation of mud jacking mechanism.
Detailed description of the invention
In order to more specifically describe the present invention, below in conjunction with the drawings and the specific embodiments, technical scheme of the present invention is described in detail.
As shown in Figure 1, slope self-level(l)ing structure in length and breadth at the bottom of a kind of beam, comprises disc 1, supporting mechanism 2, base 3 and mud jacking mechanism 4; Wherein:
As shown in Figure 2, disc 1 batch machining in factory, its end face is horizontal plane, and bottom surface is spherical concave surface, and curvature is ρ 1, end face welds embedded bar 5 and strengthens the connection with beam body concrete; Disc 1 is direct load-carrying member, needs bearing capacity to pass to beam body, therefore arranges some layers of reinforced mesh in the concrete of its end face, to disperse its local pressure; When beam slab is prefabricated, setting-out goes out support position, and disc 1 is placed in correspondence position, and carries out colligation with other reinforcing bar in beam body and be connected, casting beams board concrete.
As shown in Figure 3, supporting mechanism 2 batch machining in factory, supporting mechanism 2 is made up of screw rod 22, nut 23 and sleeve pipe 21.Be connected by internal and external threads between screw rod 22 with sleeve pipe 21, by executing stubborn screw rod 22 or sleeve pipe 21 can adjust arbitrarily support overall height, but its maximum height should meet the requirement of stressed minimum effective thread tooth number; Nut 23 end face is spherical convex surface, supposes that its curvature is ρ 2, equal with the spherical female face curvature ρ 1 of disc 1, and disc 1 concave ball surfaces center of circle angle should be greater than nut 23 convex spherical central angle; Sleeve pipe 21 sidepiece arranges some slurry outlets 6, to guarantee to form mud jacking passage, utilizes slurry outlet 6 can execute stubborn sleeve pipe 21 simultaneously; Stressed for improving sphere further, paste rubber pad 24 at nut 23 end face.Due to the error effect of the impact of slope in length and breadth and location, the center of two spheres not on a plumb line, therefore when disc 1 concave surface just contacts with the spherical convex surface of nut 23, is a point cantact on off-centered sphere.Point cantact on sphere produces horizontal and vertical horizontal force, makes supporting mechanism 2 respect thereto 3 that slippage occur, and final when nut 23 convex surface and disc 1 concave surface fit like a glove, supporting mechanism 2 is in self-balancing stable state, realizes the self-level(l)ing on beam body slope in length and breadth; And contact owing to being that sphere is overall, therefore beam body and screw rod uniform force can be ensured, can ensure that Bearing Seat Force is even.
As shown in Figure 4, base 3 adopts elastomeric material, and pastes one deck tetrafluoro slide plate 7 (having slurry outlet 6 in advance) as slide plane at its end face, ensures planar can slide arbitrarily between supporting mechanism 2; The end face of base 3 and side all have slurry outlet 6 and two place's slurry outlets 6 are communicated with.
As shown in Figure 5, mud jacking mechanism 4 is made up of side form 41, Grouting Pipe 42 and outlet pipe 43, and side form 41 adopts bellows-like structure, height adjustable, under pressure can be self-enclosed with beam body; Base 3 forms tubular structure as the bed die of mud jacking mechanism 4 and side form 41, makes supporting mechanism 2 be positioned at this tubular structure, seamless link between side form 41 and bed die; The slurry outlet 6 of base 3 side is aimed at Grouting Pipe 42.Because disc 1, supporting mechanism 2 are steel beam column, be exposed in air perishable for a long time; Be saving construction cost in addition, the planar dimension of supporting mechanism 2 is less than supporting stand size, unfavorable to bearing under long-time or excessive load action.So after beam slab erection and after adjust to the right place in slope in length and breadth, mud jacking mechanism 4 is installed and carries out mud jacking, supporting steel member integrated wraps up and forms a concrete sphenoid by slurry, realizes by the transformation of the temporary support of steel beam column to buckling compute steel-concrete composite structure permanent support.
Present embodiment is in actual design process, first according to the weight of precast beam, meet externally threaded combined stress under beam slab Gravitative Loads be no more than steel permissible stress require under, determine that (D is major diameter of thread to screw rod 22 external screw thread dimension D × Z, Z is ridge height), and combine requirement determination ridge number N and the screw rod height H of vertical adjustment height.Then by the size of screw rod 22 size determination convex nut 23 and disc 1, disc 1 concave ball surfaces center of circle angle should be greater than nut 23 convex spherical central angle; The size of disc 1 should meet the requirement of Liang Di partial pressing in addition, improves local pressure by arranging multistory reinforced mesh sheet.Base 3 planar dimension requires to be not less than bearing plane.The spheric curvature of disc 1 and nut 23 is determined relative to the horizontal force required for base 3 slippage according to supporting mechanism 2.
The Specific construction process of present embodiment is as follows: disc 1 and supporting mechanism 2, and steel work completes according to normal process steps such as blanking, cutting, fine finishining, welding, assemblings; Disc 1 is installed when beam slab is prefabricated as the built-in fitting of beam slab, and namely first on beam slab base, setting-out goes out beam slab support position, installs disc 1, and be connected and fixed with the reinforcing bar in beam slab, then monobloc cast beam body concrete in this position; Pier is installed the permanent bearing of beam slab; Mounting seat 3 and supporting mechanism 2 on bearing, and support overall height is adjusted to design theory value; Adopt mobile crane or Bridge Erector erection beam slab, slope in length and breadth after now the elevation of each strong point of beam slab has determined i.e. Installation of beam slab all is determined, be there is Relative sliding in the slope in length and breadth according to reality between supporting mechanism 2 and base 3, make nut 23 and disc 1 be adjusted to spherical support voluntarily; The slope in length and breadth of the actual formation of beam slab can be checked further after the equal installation of the beam slab in, for the beam slab that there is deviation, still can be finely tuned by the overall height adjusting supporting mechanism 2; After in one, Installation of beam slab all reaches the smooth-going requirement designing slope in length and breadth, mud jacking mechanism 4 is installed, itself and beam slab bottom surface, base 3 define a confined space, then reserved from bottom Grouting Pipe 42 carries out mud jacking, confined space fills up by slurries, and emerge from the outlet pipe 43 of top board, form until slurries the permanent support namely defining buckling compute steel-concrete composite structure after intensity.
Present embodiment self-level(l)ing structure can improve the smooth degree that beam slab connects, improve the uniformity of Bearing Seat Force, improve the application life of bridge construction globality and bearing, and simplify construction, realize the dynamically controlled and adjustable of construction, be applicable to hollow slab beam or other beam and slab structure.
Above-mentioned is can understand and apply the invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art are according to announcement of the present invention, and the improvement made for the present invention and amendment all should within protection scope of the present invention.
Claims (8)
1. a slope self-level(l)ing structure in length and breadth at the bottom of beam, is characterized in that: comprise base, disc, supporting mechanism and mud jacking mechanism; The sleeve pipe that described supporting mechanism comprises stud and is threaded with it, described sleeve pipe to be located on base and to be had slurry outlet in advance on the downside of sleeve pipe, and described stud is connected to form by nut and screw rod, and nut end face is spherical convex surface;
Described disc is embedded in bottom beam slab in advance, and its end face is horizontal plane, and bottom surface is spherical concave surface and coordinates with nut; Described mud jacking mechanism comprises side form, outlet pipe and Grouting Pipe, and described base forms tubular structure as the bed die of mud jacking mechanism and side form, makes described supporting mechanism be positioned at this tubular structure; Described outlet pipe and Grouting Pipe are opened in the upper side and lower side of side form respectively.
2. slope self-level(l)ing structure in length and breadth at the bottom of beam according to claim 1, is characterized in that: described nut end face is pasted with rubber pad.
3. slope self-level(l)ing structure in length and breadth at the bottom of beam according to claim 1, is characterized in that: described disc and supporting mechanism all adopt steel matter.
4. slope self-level(l)ing structure in length and breadth at the bottom of beam according to claim 1, is characterized in that: described disc end face is welded with reinforcing bar.
5. slope self-level(l)ing structure in length and breadth at the bottom of beam according to claim 1, is characterized in that: be adhesive with one deck tetrafluoro slide plate between described sleeve pipe and base, tetrafluoro slide plate has slurry outlet in advance.
6. slope self-level(l)ing structure in length and breadth at the bottom of beam according to claim 1, is characterized in that: described side form adopts bellows-like structure.
7. slope self-level(l)ing structure in length and breadth at the bottom of beam according to claim 1, is characterized in that: the end face of described base and side all have slurry outlet and two places' slurry outlets are communicated with, and wherein the slurry outlet of side is aimed at described Grouting Pipe.
8. a construction method for slope self-level(l)ing structure in length and breadth at the bottom of the beam as described in claim as arbitrary in claim 1 ~ 7, concrete steps are as follows:
(1) when beam slab is prefabricated, described disc is embedded in bottom beam slab in advance;
(2) erection support on pier, and then described base and supporting mechanism are installed on bearing, and by executing stubborn stud or sleeve pipe adjustment support overall height;
(3) set up beam slab, position beam slab being embedded into disc is aimed at support position, by disc concave surface and nut convex surface self-adaptative adjustment to realize spherical support;
(4) the mud jacking mechanism described in installation, and inject slurries by Grouting Pipe, overflow from outlet pipe after the confined space surrounded by side form fills up by slurries, after grout cures, namely define the permanent support structure of steel-concrete combination.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106626008A (en) * | 2016-10-08 | 2017-05-10 | 霍尔果斯新国金新能源科技有限公司 | Mold for wind driven generator concrete tower drum duct piece |
| CN109235662A (en) * | 2018-09-12 | 2019-01-18 | 安徽省交通规划设计研究总院股份有限公司 | A kind of column board connecting equipment comprising multiple shear connector |
| CN113481823A (en) * | 2021-07-09 | 2021-10-08 | 南京博瑞吉工程技术有限公司 | Adjustable beam bottom wedge-shaped device and beam body installation process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109235662A (en) * | 2018-09-12 | 2019-01-18 | 安徽省交通规划设计研究总院股份有限公司 | A kind of column board connecting equipment comprising multiple shear connector |
| CN113481823A (en) * | 2021-07-09 | 2021-10-08 | 南京博瑞吉工程技术有限公司 | Adjustable beam bottom wedge-shaped device and beam body installation process |
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| CN104314008B (en) | 2016-01-06 |
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Address after: No. 89 round City West Road, Xihu District, Hangzhou, Zhejiang Patentee after: Zhejiang transportation planning and Design Research Institute Co., Ltd. Address before: No. 89 round City West Road, Xihu District, Hangzhou, Zhejiang Patentee before: Zhejiang Provincial Plan Design&Research Institute of Communications |
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Address after: No. 928, yuhangtang Road, Xihu District, Hangzhou City, Zhejiang Province 310011 Patentee after: Zhejiang shuzhijiaoyuan Technology Co.,Ltd. Address before: 310006 No. 89 West Ring Road, Hangzhou, Zhejiang, Xihu District Patentee before: ZHEJIANG PROVINCIAL INSTITUTE OF COMMUNICATIONS PLANNING DESIGN & RESEARCH Co.,Ltd. |