CN102418316A - Direct-reading levelling method for beam bottom support and direct-reading embedded positioning levelling steel plate - Google Patents
Direct-reading levelling method for beam bottom support and direct-reading embedded positioning levelling steel plate Download PDFInfo
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- CN102418316A CN102418316A CN2011103081295A CN201110308129A CN102418316A CN 102418316 A CN102418316 A CN 102418316A CN 2011103081295 A CN2011103081295 A CN 2011103081295A CN 201110308129 A CN201110308129 A CN 201110308129A CN 102418316 A CN102418316 A CN 102418316A
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- leveling
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Abstract
The invention discloses a direct-reading levelling method for a beam bottom support and a direct-reading embedded positioning levelling steel plate. The method comprises the following steps of: (1) manufacturing direct-reading embedded positioning levelling steel plates: making a halfway line mark on a halfway line of a side edge of each direct-reading embedded positioning levelling steel plate, and marking a height scale; (2) manufacturing precast beams: giving a longitudinal slope and a cross slope of a bridge according to a design requirement, and directly reading exposed height values of halfway lines of four side edges of each direct-reading embedded positioning levelling steel plate manufactured in the step (1) to directly position each direct-reading embedded positioning levelling steel plate; (3) embedding each direct-reading embedded positioning levelling steel plate at the bottom of each precast beam according to the exposed height values obtained in the step (2); and (4) directly hoisting the precast beams manufactured in the step (3). The invention overcomes the defects of the prior art, the calculation of the slope of the steel plate and the construction installation positioning are more concise and intuitional, and errors hardly occur.
Description
Technical field
The present invention relates to bearing quadratic method and equipment thereof at the bottom of a kind of beam, be specifically related to the direct reading leveling method of bearing at the bottom of a kind of beam, and the employed equipment of this direct reading leveling method, the pre-buried locate mode leveling of a kind of direct reading steel plate.
Background technology
Bearing is the important structure (see figure 1) that connects pier and superstructure, rises and transmits load, bears the superstructure dilatation, guarantees the stable effect of stress.The leveling steel plate is the important structure (see figure 2) that precast beam is connected with bearing at the bottom of the beam.The normal operating conditions of general bearing all is a horizontal positioned generally, bears Vertical Load.Precast beam is when mounted because the influence of horizontal wall inscription, longitudinal gradient, is not level at the bottom of the beam.Between at the bottom of the bearing of level and the out-of-level beam leveling steel plate must be installed, with the contact surface of bearing, make and bearing can be closely connected with superstructure on horizontal plane at the bottom of the adjustment beam, thereby reach the normal stressed duty of bearing.In addition, the leveling steel plate of bearing is as last pading plate, also play simultaneously load is disperseed more and evenly, effect such as protection bearing.
For cast-in-place beam, the enforcement of leveling steel plate is very simple, and level is laid one and waited steel plate in advance fixing bearing, put up then template cast-in-place after, steel plate embeds in the cast-in-place beam, realization leveling naturally.
Then comparatively complicated for precast beam, general way has two kinds at present:
(1) when prefabricated earlier at the bottom of the beam pre-buried one with beam at the bottom of concordant pre-embedded steel slab, in addition according to longitudinal gradient, wedge-shaped steel plate of horizontal wall inscription making of bridge, the size of wedge-shaped steel plate need be calculated definite then; Need be during construction according to drawing construction; And because the variation on slope in length and breadth, change in size is indefinite, and this just needs to make the wedge-shaped steel plate of various sizes; And number correspondence position one by one, the comparatively loaded down with trivial details and easy error of process.Utilize methods such as welding or epoxy resin stickup that wedge-shaped steel plate is connected with pre-embedded steel slab at the bottom of the beam afterwards again, realize leveling, this method has increased the difficulty of construction of precast beam erection stage greatly.
(2) when prefabricated directly according to longitudinal gradient, the horizontal wall inscription of bridge, with the steel plate of uniform thickness directly according at the bottom of calculating that good angle of inclination is cast-in-place and being embedded in beam.Precast beam is made the back and just can directly be lifted.Same, because each beam coming and go of slope in length and breadth need calculate the leveling angle of steel plate at the bottom of the beam of every beam, position before prefabricated, increased the difficulty of construction in prefabricated stage.Simultaneously each beam must be numbered, and can not exchange, and has improved the execution control difficulty of depositing during the beam.
To above two kinds of methods, comprehensive, second kind is superior to first kind.Reason have following some: first method has been used two block plates; Steel using amount increases greatly, for the more precast plate beam bridge of bearing, has increased cost greatly; The operation of two block plates connection simultaneously often becomes the weakness that influences the bearing installation quality, and problem of quality.Two kinds of methods all need be calculated steel plate to different slopes in length and breadth and make the gradient; All must make concrete design; First method only is that complicated problems has been postponed till the erection stage solution; And second method is just to solve complicated leveling gradient problem in the prefabricated stage, and a block plate solves the leveling problem, and quality is more guaranteed.
Look to exchange at present the method for plain plate gradient location again.Generally be to adopt the height of four angle points of control to position.Because the height of four angle points is measured the most easily and control.But the height of each angle point all simultaneously has relation with longitudinal gradient, horizontal wall inscription, so important affair calculates earlier, because four direction is easy to do anti-or obscures, carries out mark so also tackle the direction of steel plate when constructing again.
Summary of the invention
The direct reading leveling method that the purpose of this invention is to provide bearing at the bottom of a kind of beam, and the employed equipment of this direct reading leveling method, the pre-buried locate mode leveling of a kind of direct reading steel plate.The present invention will improve existing leveling steel plate, make its can through fixation mark and fixedly scale carry out reading, location, installation.The present invention be directed to the above-mentioned deficiency of prior art, particularly to two of prior art leveling steel plate method, hope can have method more intuitively succinct and that be difficult for makeing mistakes at calculating steel plate gradient and aspect, construction and installation location.
The scheme of accomplishing the foregoing invention task is the direct reading leveling method of bearing at the bottom of a kind of beam, it is characterized in that step is following:
⑴. make the pre-buried locate mode leveling of direct reading steel plate: the midline at the every pre-buried locate mode leveling of direct reading steel plate side is made center line markings, and puts on altitude scale;
. make precast beam: when prefabricated according to the longitudinal gradient that provides bridge in the designing requirement, horizontal wall inscription; On the pre-buried locate mode leveling of the direct reading steel plate of step ⑴ made, directly read the height value that exposes of four side center lines respectively, can be directly with the every pre-buried locate mode leveling of direct reading steel plate location;
. exposed height value according to what step ⑵ did, the pre-buried locate mode leveling of each direct reading steel plate is embedded in the beam of every precast beam respectively at the bottom of;
⑷. the precast beam that step ⑷ is made directly lifts.
In the prioritization scheme of above method, when step ⑴ made the pre-buried locate mode leveling of direct reading steel plate, increasing had following steps:
⑴-, the cross direction sign is set 1. at the upper surface of the pre-buried locate mode leveling of described direct reading steel plate.
The scheme of accomplishing the 2nd invention of the application task is; The employed equipment of above-mentioned direct reading leveling method: the pre-buried locate mode leveling of a kind of direct reading steel plate; Adopt the steel plate of uniform thickness, it is characterized in that, according to the scope of the longitudinal gradient that provides in the designing requirement, horizontal wall inscription value; Midline at the side of the steel plate of every said uniform thickness is made center line markings respectively, and puts on altitude scale.
More than directly the prioritization scheme of the pre-buried locate mode leveling of reading steel plate be that the upper surface of the pre-buried locate mode leveling of described direct reading steel plate is provided with the cross direction sign.
In other words, the present invention is through exchanging discovering of plain plate, for the pre-buried leveling steel plate of uniform thickness type, is the adjustment of slope in length and breadth that realizes through the difference that exposes height.Though the location is the height that exposes of four angle points of steel plate the most easily; But exposing of four angle points highly be and longitudinal gradient, the related two-dimentional variable of two gradients of horizontal wall inscription, but the midline on every limit of steel plate expose highly then be only with longitudinal gradient, one dimension variate-value that one of them gradient of horizontal wall inscription is relevant.Unique shortcoming is that the center line on this limit is difficult to accurately location in construction.
This condition has been arranged, and we just can make a center line markings in steel plate side midline, and put on altitude scale, and each is highly all corresponding with a gradient so.We just can be according to the correlation that exposes the height and the gradient, Direct Mark value of slope.Because longitudinal gradient, horizontal wall inscription are easy to calculate, also usually directly provide longitudinal gradient, horizontal wall inscription value in the design document.We utilize the known gradient, directly read the height that exposes of four side center lines in the steel plate side, can realize exempting from the design-calculated function directly with the steel plate location.
The plane length of side of leveling steel plate is not limited to length-specific, and leveling steel plate plane generally should be rectangle, but is not limited to rectangle, can be other polygons of reducing out through rectangle.The distance of side display scale is relevant with the plane length of side.For example: vertical bridge is the leveling steel plate of 80cm to the length of side, and advance side or 1% graduation range of retreating side are 80/2 * 1%=0.4cm; The direction across bridge length of side is the leveling steel plate of 60cm, and 1% graduation range on left side or right side is 60/2 * 1%=0.3cm.
Gradient sign regulation: the gradient has the branch of ascents and descents, according to custom, goes up a slope to just from retreating the side direction advance side, and descending is for negative, goes up a slope to the right side from the left side to just, and descending is to bear.
If we set exposing of steel plate center as usual highly is the half the of steel plate thickness; So every side scale is 0% between two parties, be respectively up or down ± 1%, ± 2% ... Like scale spacing big (greater than 1.5cm); But scale division in the mark also, i.e. 0.5%, 1.5% scale is to improve precision.
From the positive and negative relation of the gradient, we can know, are retreating side and left side, and the positive gradient is below 0 scale, and negative slope is above 0 scale; On advance side and right side, the positive gradient is above 0 scale, and negative slope is below 0 scale.
If with horizontal wall inscription is i, longitudinal gradient is j, and then retreating side is only relevant with the j height that exposes with advance side, and the left side with the right side is and only relevant the exposing highly of i.
Please concern that be convenient to install, above the leveling steel plate, but mark cross direction sign is labeled as direction of advance, direction of retreat, left side, right side for further li.Facilitate the identification of direction like this, can not make mistakes.Behind precast beam (plate) casting complete, the cross direction sign is embedded in the beam body, does not influence bearing and uses.
Description of drawings
Fig. 1 is the seat structure sketch map that connects pier and superstructure in the prior art;
Fig. 2-1, Fig. 2-2 are prior art bearing leveling method sketch map commonly used;
Fig. 3 is the bearing drawing (vertically) that leveling steel plate of the present invention is housed;
Fig. 4 is a leveling steel plate side scale drawing (vertically);
Fig. 5-1, Fig. 5-2 are patented invention bearing leveling method sketch map; Wherein, Fig. 5-1 is a precast plate beam construction sketch map; Fig. 5-2 is a precast plate beam support scheme of installation;
Fig. 6 is the bearing drawing (laterally) that leveling steel plate of the present invention is housed;
Fig. 7 is a leveling steel plate side scale drawing (laterally);
Fig. 8 is for directly reading the high-level schematic that exposes of four side center lines in the steel plate side;
Fig. 9 is for being provided with the sketch map of cross direction sign at the upper surface of leveling steel plate.
The specific embodiment
Among the figure, precast beam or plate 1; Abutment or bridge pier 2; Bearing 3; (the present invention) leveling steel plate 4; Bearing 5; Bearing pad stone 6; Leveling steel plate side scale 7; Side center line graduation mark 8; The orientation and the corresponding gradient indicate 9; Leveling steel plate end face 12; Leveling steel plate side 13; Leveling steel plate end face direction, the gradient indicate 14.
Claims (6)
1. the direct reading leveling method of bearing at the bottom of the beam is characterized in that step is following:
⑴. make the pre-buried locate mode leveling of direct reading steel plate: the midline at the every pre-buried locate mode leveling of direct reading steel plate side is made center line markings, and puts on altitude scale;
. make precast beam: when prefabricated according to the longitudinal gradient that provides bridge in the designing requirement, horizontal wall inscription; On the pre-buried locate mode leveling of the direct reading steel plate of step ⑴ made, directly read the height value that exposes of four side center lines respectively, can be directly with the every pre-buried locate mode leveling of direct reading steel plate location;
. exposed height value according to what step ⑵ did, the pre-buried locate mode leveling of each direct reading steel plate is embedded in the beam of every precast beam respectively at the bottom of;
⑷. the precast beam that step ⑷ is made directly lifts.
2. the direct reading leveling method of bearing is characterized in that at the bottom of the beam according to claim 1, and in step ⑴, increasing has following steps:
⑴-, the cross direction sign is set 1. at the upper surface of the pre-buried locate mode leveling of described direct reading steel plate.
3. the employed equipment of direct reading leveling method of bearing at the bottom of the said beam of claim 1: the pre-buried locate mode leveling of a kind of direct reading steel plate; Adopt the steel plate of uniform thickness; It is characterized in that; According to the scope of the longitudinal gradient that provides in the designing requirement, horizontal wall inscription value, make center line markings respectively in the midline of the side of the steel plate of every said uniform thickness, and put on altitude scale.
4. the pre-buried locate mode leveling of direct reading according to claim 3 steel plate is characterized in that, the upper surface of the pre-buried locate mode leveling of described direct reading steel plate is provided with the cross direction sign.
5. according to claim 3 or the pre-buried locate mode leveling of 4 described direct readings steel plate, it is characterized in that the midline of described side is made respectively on the center line markings, also is provided with sign symbol.
6. according to claim 3 or the pre-buried locate mode leveling of 4 described direct readings steel plate, it is characterized in that the midline of described side is made respectively on the center line markings, also is provided with the sign of horizontal wall inscription and longitudinal gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110308129 CN102418316B (en) | 2011-06-28 | 2011-10-12 | Direct-reading levelling method for beam bottom support and direct-reading embedded positioning levelling steel plate |
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| CN201110176944.0 | 2011-06-28 | ||
| CN201110176944 | 2011-06-28 | ||
| CN 201110308129 CN102418316B (en) | 2011-06-28 | 2011-10-12 | Direct-reading levelling method for beam bottom support and direct-reading embedded positioning levelling steel plate |
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| CN102418316A true CN102418316A (en) | 2012-04-18 |
| CN102418316B CN102418316B (en) | 2013-10-23 |
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Citations (5)
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| KR100897060B1 (en) * | 2007-07-03 | 2009-05-14 | 연세대학교 산학협력단 | The continuous bridge structure including a prestressing plate and it's building method |
| KR20100069840A (en) * | 2008-12-17 | 2010-06-25 | 재단법인 포항산업과학연구원 | Construction method of continuous bridge using precast panel and steel box girder |
| CN101775809A (en) * | 2010-01-15 | 2010-07-14 | 中铁大桥局集团第五工程有限公司 | Construction method of marine self-floating type steel soleplate single-wall suspension box cofferdam and single-wall suspension box cofferdam |
| CN101824802A (en) * | 2010-02-08 | 2010-09-08 | 铁道第三勘测设计院集团有限公司 | Site installation and debugging method of adjustable bridge steel support and matched steel support |
| CN201671063U (en) * | 2010-05-25 | 2010-12-15 | 中铁十七局集团第三工程有限公司 | Movable steel base for construction precast beams and standard knot thereof |
-
2011
- 2011-10-12 CN CN 201110308129 patent/CN102418316B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100897060B1 (en) * | 2007-07-03 | 2009-05-14 | 연세대학교 산학협력단 | The continuous bridge structure including a prestressing plate and it's building method |
| KR20100069840A (en) * | 2008-12-17 | 2010-06-25 | 재단법인 포항산업과학연구원 | Construction method of continuous bridge using precast panel and steel box girder |
| CN101775809A (en) * | 2010-01-15 | 2010-07-14 | 中铁大桥局集团第五工程有限公司 | Construction method of marine self-floating type steel soleplate single-wall suspension box cofferdam and single-wall suspension box cofferdam |
| CN101824802A (en) * | 2010-02-08 | 2010-09-08 | 铁道第三勘测设计院集团有限公司 | Site installation and debugging method of adjustable bridge steel support and matched steel support |
| CN201671063U (en) * | 2010-05-25 | 2010-12-15 | 中铁十七局集团第三工程有限公司 | Movable steel base for construction precast beams and standard knot thereof |
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Address after: 210017 Jiangsu, Nanjing, West Gate Street, No. 223 Patentee after: JSTI GROUP Co.,Ltd. Address before: 210017 Jiangsu, Nanjing, West Gate Street, No. 223 Patentee before: JIANGSU TRANSPORTATION RESEARCH INSTITUTE Co.,Ltd. |
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