CN112523068A - Mounting and fixing structure and construction method of inverted T-shaped bent cap damping chloroprene rubber sheet - Google Patents
Mounting and fixing structure and construction method of inverted T-shaped bent cap damping chloroprene rubber sheet Download PDFInfo
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- CN112523068A CN112523068A CN202011397659.7A CN202011397659A CN112523068A CN 112523068 A CN112523068 A CN 112523068A CN 202011397659 A CN202011397659 A CN 202011397659A CN 112523068 A CN112523068 A CN 112523068A
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- Prior art keywords
- chloroprene rubber
- rubber sheet
- inverted
- nut
- bolt
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Classifications
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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
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a fixing structure and a construction method of an inverted T-shaped bent cap damping chloroprene rubber sheet. Comprises a nut, a bolt and a chloroprene rubber sheet; the chloroprene rubber sheet is provided with a countersunk bolt hole, the nut is embedded in the concrete of the inverted T-shaped capping beam, and the bolt penetrates through the countersunk bolt hole in the chloroprene rubber sheet and is screwed into the nut to anchor the chloroprene rubber sheet on the inverted T-shaped capping beam. The nut is a K plate nut. The chloroprene rubber sheet is not easy to fall off when the K plate bolt is used for mounting the chloroprene rubber sheet, and the chloroprene rubber sheet can be permanently fixed. The pre-embedding of the K plate nut is synchronously carried out along with the installation of the inverted T-shaped bent cap reinforcing steel bars, the total construction period is not occupied, the chloroprene rubber sheets are installed, time is saved, the efficiency is high, and the labor cost is saved.
Description
Technical Field
The invention belongs to the technical field of road and bridge engineering, and particularly relates to an installation and fixation structure and a construction method of an inverted T-shaped bent cap damping chloroprene rubber sheet.
Background
The chloroprene rubber sheet is used as a damping facility of the inverted T-shaped cover beam, and is used for preventing the prefabricated box beam from directly colliding with the back wall of the inverted T-shaped cover beam and reducing energy caused by collision of the prefabricated box beam and the inverted T-shaped cover beam under the action of automobile braking load or earthquake force, so that the installation quality of the chloroprene rubber sheet is very important.
The traditional method for installing the chloroprene rubber sheet comprises an adhering method, a plastic expansion bolt anchoring method and an angle steel framework fixing method. Although the sticking method is simple to operate, the box girder needs to be stuck by special strong glue, is easy to touch and repair during subsequent box girder hoisting operation. In the operation process of the bridge, the chloroprene rubber sheets are easy to drop. The plastic expansion bolt anchoring method has the advantages that the strength of concrete is high, drilling is not easy, the drilling workload is large, time and labor are wasted, the appearance quality of the bent cap is affected, the bent cap is easily touched when a box girder is subsequently hoisted, and a chloroprene rubber sheet is easily dropped in the operation process of a bridge. The fixing method of the angle steel framework has the same defects as the anchoring method of the plastic expansion bolt, and the angle steel framework needs to be subjected to anti-corrosion treatment, so that the workload is increased.
Disclosure of Invention
The invention aims to design an installation and fixation structure and a construction method of an inverted T-shaped bent cap damping chloroprene rubber sheet, which can permanently fix the chloroprene rubber sheet, is simple in construction, time-saving, efficient, accurate in position and capable of ensuring engineering quality.
The technical scheme of the invention is that the fixing structure of the inverted T-shaped bent cap damping chloroprene rubber sheet comprises a nut, a bolt and a chloroprene rubber sheet; the chloroprene rubber sheet is provided with a countersunk bolt hole, the nut is embedded in the concrete of the inverted T-shaped cover beam, the bolt penetrates through the countersunk bolt hole in the chloroprene rubber sheet and is screwed into the nut, the chloroprene rubber sheet is anchored on the inverted T-shaped cover beam, and a compression distance is reserved between the bolt head and the surface of the chloroprene rubber sheet.
The nut is a K plate nut.
The construction method of the fixing structure of the inverted T-shaped bent cap damping chloroprene rubber sheet comprises the following construction steps:
(1) the bolt stress is calculated, and the shear resistance bearing capacity calculation formula is as follows:
in the formula: n is a radical ofvDesign value of shear resistance (N)
n-number of shear bolts
d-diameter of bolt (mm)
fvShear strength design value (MPa) of the bolt
The weight of the chloroprene rubber sheet is as follows:
N＝m×g
in the formula: n-weight of chloroprene rubber sheet (N)
m-mass (kg) of chloroprene rubber sheet
g-acceleration of gravity (N/kg)
Calculation result requirement Nv＞N；
(2) Pre-buried K board nut
Firstly, in the process of installing the reinforcing steel bars of the inverted T-shaped cover beam, firstly, releasing lines to determine the position of a chloroprene rubber sheet, then embedding K plate nuts in the corresponding positions of four corners of the chloroprene rubber sheet, fixing the outer surface of the K plate nut by using well-shaped reinforcing steel bars in order to ensure the stability of the K plate nuts, and then fixing the well-shaped reinforcing steel bars and the reinforcing steel bars of the cover beam in a spot welding manner;
installing an inverted T-shaped bent cap template; pouring the inverted T-shaped cover beam concrete twice, forming holes at positions of the K plate nuts corresponding to the templates, screwing in bolts, and enabling the K plate nuts to be tightly attached to the bolts so as to ensure that slurry does not leak in the concrete pouring process;
pouring inverted T-shaped cover beam concrete; in the concrete pouring process, the ash point is far away from the embedded position of the K plate nut, the vibrating rod is strictly prohibited to touch the K plate nut, and when the K plate nut is not in a horizontal state, adjustment is performed in time;
fourthly, removing the mold and preserving health; removing the template, and watering to cure the concrete, wherein the curing time is not less than 14 d;
(3) installation chloroprene rubber sheet
The position of the K plate nut on the inverted T-shaped cover beam is rechecked, then the bolt penetrates through the chloroprene rubber sheet and is screwed into the K plate nut, and a compression distance is reserved between the bolt head and the surface of the chloroprene rubber sheet.
The fixing structure and the construction method of the inverted T-shaped bent cap damping chloroprene rubber sheet have the following advantages:
1. the chloroprene rubber sheet is installed by using a K plate bolt, is not easy to fall off, and can be permanently fixed.
And 2, embedding the K plate nut in advance, so that the accurate installation position of the chloroprene rubber sheet can be ensured.
3. The construction process is simple, the embedding of the K plate nut is synchronously carried out along with the installation of the inverted T-shaped bent cap reinforcing steel bars, the total construction period is not occupied, the installation of the chloroprene rubber sheets is time-saving and efficient, and the labor cost is saved.
4. When the K plate nut is pre-buried, the K plate nut is fixed on the template by using the bolt, so that the slurry feeding of the K plate nut hole is avoided, and the engineering quality can be ensured.
Drawings
Fig. 1 is a schematic view of a fixing structure of an inverted T-shaped cover beam damping chloroprene rubber sheet (the thickness of the chloroprene rubber sheet and a K-plate bolt are partially enlarged in the figure).
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Description of reference numerals:
1, K plate nut, 2 bolts, 3 neoprene sheets, 4 countersunk bolt holes, 5 inverted T-shaped bent cap
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Examples
The fixing structure of the inverted-T-shaped bent cap damping chloroprene rubber sheet in the embodiment is shown in figures 1 and 2.
The fixing structure of the inverted T-shaped bent cap damping chloroprene rubber sheet comprises a nut, a bolt 2 and a chloroprene rubber sheet 3; the chloroprene rubber sheet 3 is provided with a countersunk bolt hole 4, the nut is embedded in concrete of the inverted T-shaped bent cap 5, the bolt 2 penetrates through the countersunk bolt hole 4 in the chloroprene rubber sheet 4 and is screwed into the nut, the chloroprene rubber sheet 3 is anchored on the inverted T-shaped bent cap 5, and a compression distance of 5mm is reserved between the bolt head and the surface of the chloroprene rubber sheet 3. The nut used in this embodiment is a K-plate nut 1.
In this embodiment, the construction method of the fixing structure of the inverted T-shaped bent cap damping chloroprene rubber sheet includes the following construction steps:
(1) the stress of the bolt 2 is calculated, and the shear resistance bearing capacity calculation formula is as follows:
in the formula: n is a radical ofvDesign value of shear resistance (N)
n-number of shear bolts
d-diameter of bolt (mm)
fvShear strength design value (MPa) of the bolt
In this embodiment, an M16 type K plate bolt is used, the diameter d of the bolt shank is 16mm, the design value of the shear strength of a 4.8-class ordinary bolt is fv 140MPa, and the number of bolts used for installing neoprene sheets is n 4, so the design value of the shear resistance of the bolt is:
the weight of the chloroprene rubber sheet 3 is as follows:
N＝m×g
in the formula: n-weight of chloroprene rubber sheet (N)
m-mass (kg) of chloroprene rubber sheet
g-acceleration of gravity (N/kg)
The size of the chloroprene rubber sheet used in this example was 50X 2cm, and the density of the chloroprene rubber sheet was 1.5g/cm3Then, the weight of each chloroprene rubber sheet is 7.5kg, and the gravity is as follows:
N＝m×g＝7.5×10＝75N
calculation result NvN is greater than the requirement;
(2) embedded K plate nut 1
Firstly, in the process of installing the reinforcing steel bars of the inverted T-shaped bent cap 5, firstly, releasing lines to determine the position of the chloroprene rubber sheet 3, then embedding K plate nuts 1 at the corresponding positions of four corners of the chloroprene rubber sheet 3, fixing the outer surface of the K plate nut 1 by using well-shaped reinforcing steel bars in order to ensure the stability of the K plate nut 1, and then fixing the well-shaped reinforcing steel bars and the reinforcing steel bars of the inverted T-shaped bent cap 5 in a spot welding manner; in this embodiment, four K plate nuts 1 required for one chloroprene rubber sheet 3 are fixed on one well-shaped steel bar in advance, and after the well-shaped steel bar is well positioned in the construction, the well-shaped steel bar is fixed with the inverted T-shaped bent cap 5 by spot welding.
Installing a template of an inverted T-shaped bent cap 5; pouring the inverted T-shaped cover beam concrete twice, forming holes at positions of the K plate nuts corresponding to the templates, screwing in bolts, and enabling the K plate nuts to be tightly attached to the bolts so as to ensure that slurry does not leak in the concrete pouring process;
pouring inverted T-shaped cover beam concrete; in the concrete pouring process, the ash point is far away from the pre-embedded position of the K plate nut 1, the vibrating rod is strictly prohibited to touch the K plate nut 1, and when the K plate nut 1 is not in a horizontal state, adjustment is carried out in time;
fourthly, removing the mold and preserving health; removing the template, and watering to cure the concrete, wherein the curing time is not less than 14 d;
(3) installation of chloroprene rubber sheet 3
The position of the K plate nut on the inverted T-shaped bent cap 5 is rechecked, then the bolt 2 penetrates through the chloroprene rubber sheet 3 and is screwed into the K plate nut 1, and a compression distance of 5mm is reserved between the bolt head and the surface of the chloroprene rubber sheet 3.
The key points of the construction are as follows:
firstly, when the bolt 2 is in model selection, the shearing strength is calculated, and a proper bolt 2 and a matched K plate nut 1 are selected.
And secondly, fixing the periphery of the K plate nut 1 by using a well-shaped steel bar and a main bar of the inverted T-shaped bent cap 5.
And thirdly, a hole is formed in the template of the inverted T-shaped bent cap 5, and after the template is installed, the K plate nut 1 is tightly attached and fixed with the template through a matched M16 bolt, so that slurry is prevented from entering.
And fourthly, strictly prohibiting the vibrating rod from touching the K plate nut 1 in the concrete pouring process.
Before the chloroprene rubber sheet 3 is installed, detecting the distance between the K plate nuts 1, then installing the chloroprene rubber sheet 3, and after the bolt 2 is screwed into the chloroprene rubber sheet 3, keeping a compression distance of 3-10mm between the bolt head and the surface of the chloroprene rubber sheet 3.
When the prefabricated box girder is constructed, in the girder falling process, in order to prevent collision between the prefabricated box girder and the inverted T-shaped bent cap 5, the chloroprene rubber sheet 3 falls off, a girder hanging person prepares a wood wedge of 8.5 multiplied by 8.5cm, and when the box girder moves towards the inverted T-shaped bent cap 5, the impact of the prefabricated box girder on the inverted T-shaped bent cap 5 is buffered by the wood wedge.
In the method for mounting the chloroprene rubber sheet 3 on the inverted T-shaped bent cap 5, the permanent property of the chloroprene rubber sheet 3 is difficultly ensured by a sticking method, and holes are drilled on the inverted T-shaped bent cap 5 at the later stage by a plastic expansion bolt anchoring method and an angle steel framework fixing method. Now, a plastic expansion bolt anchoring method is compared with the fixing structure of the inverted-T-shaped bent cap damping chloroprene rubber sheet, namely a K-plate bolt anchoring method for short. If 120 chloroprene rubber sheets 3 are installed, 480 holes are needed to be drilled in total according to the calculation that 4 holes are needed to be drilled in each chloroprene rubber sheet 3. The process economics analysis is shown in table 1:
TABLE 1 summary of economic benefit analysis of plastic expansion bolt anchoring method and K-plate bolt anchoring method
From the analysis, the cost of the plastic expansion bolt anchoring method is 3620 yuan, and the construction period is 5 days; the cost of the K plate bolt anchoring method is 2096 yuan, and the required construction period is 2 days. Through comparative analysis of the two methods, the cost of constructing 120 chloroprene rubber sheets by the K plate bolt anchoring method is saved by 1524 yuan, and the construction period is saved by 3 days.
The K plate bolt anchoring method is simple in process, time-saving and efficient, labor cost is saved, and installation quality is guaranteed.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. The utility model provides a fixed knot of type of falling T bent cap shock attenuation chloroprene rubber piece constructs, characterized by: comprises a nut, a bolt and a chloroprene rubber sheet; the chloroprene rubber sheet is provided with a countersunk bolt hole, the nut is embedded in the concrete of the inverted T-shaped cover beam, the bolt penetrates through the countersunk bolt hole in the chloroprene rubber sheet and is screwed into the nut, the chloroprene rubber sheet is anchored on the inverted T-shaped cover beam, and a compression distance is reserved between the bolt head and the surface of the chloroprene rubber sheet.
2. The fixing structure of the inverted-T-shaped bent cap shock-absorbing chloroprene rubber sheet as claimed in claim 1, wherein: the nut is a K plate nut.
3. The construction method of the fixing structure of the inverted T-shaped capping beam damping chloroprene rubber sheet as claimed in claim 1, comprises the following construction steps:
(1) the bolt stress is calculated, and the shear resistance bearing capacity calculation formula is as follows:
in the formula: n is a radical ofvDesign value of shear resistance (N)
n-number of shear bolts
d-diameter of bolt (mm)
fvShear strength design value (MPa) of the bolt
The weight of the chloroprene rubber sheet is as follows:
N＝m×g
in the formula: n-weight of chloroprene rubber sheet (N)
m-mass (kg) of chloroprene rubber sheet
g-acceleration of gravity (N/kg)
Calculation result requirement Nv＞N；
(2) Pre-buried K board nut
Firstly, in the process of installing the reinforcing steel bars of the inverted T-shaped cover beam, firstly, releasing lines to determine the position of a chloroprene rubber sheet, then embedding K plate nuts in the corresponding positions of four corners of the chloroprene rubber sheet, fixing the outer surface of the K plate nut by using well-shaped reinforcing steel bars in order to ensure the stability of the K plate nuts, and then fixing the well-shaped reinforcing steel bars and the reinforcing steel bars of the cover beam in a spot welding manner;
installing an inverted T-shaped bent cap template; pouring the inverted T-shaped cover beam concrete twice, forming holes at positions of the K plate nuts corresponding to the templates, screwing in bolts, and enabling the K plate nuts to be tightly attached to the bolts so as to ensure that slurry does not leak in the concrete pouring process;
pouring inverted T-shaped cover beam concrete; in the concrete pouring process, the ash point is far away from the embedded position of the K plate nut, the vibrating rod is strictly prohibited to touch the K plate nut, and when the K plate nut is not in a horizontal state, adjustment is performed in time;
fourthly, removing the mold and preserving health; removing the template, and watering to cure the concrete, wherein the curing time is not less than 14 d;
(3) installation chloroprene rubber sheet
The position of the K plate nut on the inverted T-shaped cover beam is rechecked, then the bolt penetrates through the chloroprene rubber sheet and is screwed into the K plate nut, and a compression distance is reserved between the bolt head and the surface of the chloroprene rubber sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011397659.7A CN112523068A (en) | 2020-12-04 | 2020-12-04 | Mounting and fixing structure and construction method of inverted T-shaped bent cap damping chloroprene rubber sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011397659.7A CN112523068A (en) | 2020-12-04 | 2020-12-04 | Mounting and fixing structure and construction method of inverted T-shaped bent cap damping chloroprene rubber sheet |
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| CN112523068A true CN112523068A (en) | 2021-03-19 |
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|---|---|---|---|---|
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| CN1804339A (en) * | 2005-12-16 | 2006-07-19 | 贵阳铝镁设计研究院 | Method for fixing connection steel plate on concrete column surface |
| DE102005018027A1 (en) * | 2005-04-14 | 2006-10-19 | Gerb Schwingungsisolierungen Gmbh & Co Kg | Vehicle bridge with vibration and structure-borne sound damping |
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| CN206887780U (en) * | 2017-06-16 | 2018-01-16 | 中铁六局集团天津铁路建设有限公司 | A kind of pre-buried hanging basket connection component of pier shaft |
| CN107964868A (en) * | 2017-12-06 | 2018-04-27 | 南昌大学 | A kind of Self-resetting spring retainer buffers the anti-fall girder construction of Antivibration block |
| CN110630035A (en) * | 2019-09-10 | 2019-12-31 | 西南交通大学 | Steel column supporting structure for bottom of reinforced concrete floor beam |
| CN111764260A (en) * | 2020-08-04 | 2020-10-13 | 四川省公路规划勘察设计研究院有限公司 | Bridge buffer and antidetonation bridge that takes precautions against earthquakes |
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2020
- 2020-12-04 CN CN202011397659.7A patent/CN112523068A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0889179A1 (en) * | 1997-06-30 | 1999-01-07 | Japan Highway Public Corporation | Bridge of shock-absorbing construction |
| DE102005018027A1 (en) * | 2005-04-14 | 2006-10-19 | Gerb Schwingungsisolierungen Gmbh & Co Kg | Vehicle bridge with vibration and structure-borne sound damping |
| CN1804339A (en) * | 2005-12-16 | 2006-07-19 | 贵阳铝镁设计研究院 | Method for fixing connection steel plate on concrete column surface |
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| CN203530832U (en) * | 2013-11-04 | 2014-04-09 | 中铁第一勘察设计院集团有限公司 | Main beam end structure sharing horizontal seismic force |
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Application publication date: 20210319 |