CN209338990U - A kind of prestressing force assembled anti-collision wall - Google Patents
A kind of prestressing force assembled anti-collision wall Download PDFInfo
- Publication number
- CN209338990U CN209338990U CN201822130781.2U CN201822130781U CN209338990U CN 209338990 U CN209338990 U CN 209338990U CN 201822130781 U CN201822130781 U CN 201822130781U CN 209338990 U CN209338990 U CN 209338990U
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- China
- Prior art keywords
- concret block
- shape
- reinforcing bar
- concret
- collision wall
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Abstract
A kind of prestressing force assembled anti-collision wall is made of the L shape concret block that upper and lower two prestressed strands concatenate along longitudinal direction；The asymmetric ∪ shape that concret block is longitudinally evenly spaced on by one group connects reinforcing bar and connect with bridge wing plate, is perfused with epoxy resin adhesive between concret block bottom surface and bridge wing plate upper surface.When constructing the anti-collision wall, the first prefabricated ∪ shape of batch production connects reinforcing bar and concret block, and then pre-buried ∪ shape connects reinforcing bar in bridge wing plate, and last on-site assembly concret block forms anti-collision wall after applying prestressing force and grouting.The anti-collision wall has many advantages, such as that high, the whole continuity of low difficulty of construction, short construction period, construction efficiency is good, surface smoothness is high, bending resistance and tensile property are good.
Description
Technical field
The utility model relates to technical field of bridge engineering, especially a kind of prestressing force assembled anti-collision wall.
Background technique
Accessory structure of the anti-collision wall as bridge, is arranged in the edge on the outside of girder wing plate, is important safety shields that,
With preventing driving vehicle to be driven out to bridge beam action for some reason.
Existing anti-collision wall takes cast-in-place construction to construct usually after the completion of main girder construction on girder.It takes cast-in-place
Construct anti-collision wall, it usually needs then installation inner side template and outboard template pour mixed between inner side template and outboard template
Solidifying soil forms anti-collision wall.This anti-collision wall construction method has the disadvantage in that
1, the fixed installation complex process of template, the auxiliary installing device needed is more, and the duration is longer, and construction efficiency is low.
2, template is not fixed easily, and is easily occurred when casting concrete to run mould phenomenon, is led to the anti-collision wall surface irregularity poured.
3, anti-collision wall is longitudinally connected does not set by a small amount of regular reinforcement or reinforcing bar, poor continuity, and anti-bending strength is low.
4, it is connected, is not connected firmly with cement slurry between anti-collision wall bottom surface and girder wing plate, tensile property is low.
Utility model content
The purpose of the utility model is to provide a kind of prestressing force assembled anti-collision walls, to overcome lacking for above-mentioned existing anti-collision wall
Point.
Prestressing force assembled anti-collision wall provided by the utility model, including by the longitudinal (bridge of upper and lower two prestressed strands
Trend) concatenation L shape concret block；Concret block passes through 3-5 asymmetric ∪ shapes being longitudinally evenly spaced on (i.e.
The left side of ∪ is long, the right is short) connection reinforcing bar connect with bridge wing plate, fills between concret block bottom surface and bridge wing plate upper surface
It is marked with epoxy resin adhesive.
The concret block longitudinal length is 2.0m~4.0m, is highly 1000~1300mm, top transverse width 250
~320mm, bottom surface 800~950mm of lateral length；Longer section of ∪ shape connection reinforcing bar away from the concret block back side 50~
60mm, upper end is apart from 150~160mm of concret block top surface；∪ shape connects the relatively short section of reinforcing bar away from concret block front bottom
100~120mm of edge, upper end is apart from 100~120mm of concret block front；∪ shape connects the flat segments of reinforcing bar apart from the bridge wing
80~100mm of plate upper surface；Two prestressed strands up and down are located at concret block end face center and concrete block
On the vertical line of body bottom surface, top prestressed strand is 700~800mm, lower part prestressing force at a distance from concret block bottom surface
Steel beam is 200~250mm at a distance from concret block bottom surface.
The construction method of above-mentioned prestressing force assembled anti-collision wall, comprising the following steps:
Step 1, prefabricated ∪ shape connect reinforcing bar
Use diameter for 10mm, model HRB335 reinforcing bar by ∪ shape connect reinforcing bar shape and size it is prefabricated construct it is anti-
∪ shape needed for hitting wall connects reinforcing bar, spare；
Step 2, precast concrete block
Concret block is prefabricated in factory, is poured by the size of concret block using template and builds up bottom periphery with height
Degree is the L-shaped concret block in the enclosing of 20mm, cross section, and being formed in concret block using sebific duct core pulling method can be with
The prestressed strand reserving hole channel that the ∪ shape of ∪ shape connection reinforcing bar grafting connects reinforcing bar reserving hole channel, passes through for prestressed strand
The grouting duct of concret block front and bottom surface is located at a upper and lower opening；Wherein (close to the concret block back side
) the upper end right-angle bending of back segment of ∪ shape connection reinforcing bar reserving hole channel is opened on the back side of concret block, the connection of ∪ shape
The leading portion of reinforcing bar reserving hole channel is blind hole；
Step 3, in the preparation process of bridge main beam, exist in bridge wing plate according to the prefabricated concret block of step 2
Installation site (back side of concret block and the outer rim of bridge wing plate maintain an equal level) prefabricated ∪ shape of pre-buried step 1 in bridge wing plate
Reinforcing bar is connected, makes ∪ shape connection reinforcing bar perpendicular to the upper surface of bridge wing plate, its leading portion and back segment respectively and in concret block
The leading portion and back segment of ∪ shape connection reinforcing bar reserving hole channel correspond to each other one by one, and the ∪ shape being embedded in bridge wing plate is made to connect reinforcing bar
Upper surface of the flat segments away from bridge wing plate be 90mm；
Step 4, assembling concret block form anti-collision wall
The prefabricated concret block of step 2 is connect with the ∪ shape on bridge wing plate one by one by steel reinforcement abutting joints using lift-on/lift-off system；
Then prestressed strand is passed through into the prestressed strand reserving hole channel in concret block, stretch-draw prestressing force steel beam, cable tensios control
Stress takes 0.7 dual intensity standard value, is anchored prestressed strand both ends with prestressed anchor after tensioning, reserved to prestressed strand
Duct carries out cement slurry mud jacking；Then it is in the milk one by one to concret block, takes funnel pressure grouting normal direction concrete block
Grouting duct on body pours into epoxy resin adhesive, when epoxy resin adhesive is full of the enclosing of concret block bottom periphery
The space and ∪ shape formed with bridge wing plate upper surface connect reinforcing bar reserving hole channel, and connects from the ∪ shape on the concret block back side
It connects when reinforcing bar reserving hole channel upper end opening is overflowed and stops grouting, the upper port in duct of being in the milk is blocked；Complete the anticollision of bridge side
Wall is constructed；
After completing the constructing of bridge other side anti-collision wall in the same way, add cement veneers in the outside of anti-collision wall, constitutes
The bilateral anti-collision wall of bridge.
Compared with prior art, the utility model has the beneficial effects that
1, anti-collision wall is made of the prefabricated concret block on-site assembly of batch production, is not required to scene template one-piece casting,
Difficulty of construction greatly is alleviated, construction period is shortened, improves construction efficiency.
2, concret block is closely connected by upper and lower two prestressed strands, can be improved anti-collision wall whole continuity and
The anti-bending strength of surface smoothness, anti-collision wall is good.
3, concret block and bridge wing plate ∪ shape connect reinforcing bar and connect, while with the epoxy resin gluing of thickness 20mm
The contact surface of both agent bondings, can be such that concret block is firmly combined with bridge wing plate, the tensile property of anti-collision wall greatly improves.
4, the control stress for prestressing of prestressed strand takes 0.7 dual intensity standard value, it can be ensured that in the situation that prestressing force is enough
Lower concret block will not rupture.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram (transverse cross) of the utility model anti-collision wall；
Fig. 2 is A-A cross-sectional view (only the drawing two concret blocks of head and the tail) along Fig. 1；
Fig. 3 is the transverse cross of concret block；
Fig. 4 is the top view of Fig. 3.
Symbol description in figure: 1- concret block, 2- bridge wing plate, 3- prestressed strand reserving hole channel, 4- prestress steel
Beam, 5- prestressed anchor, 6- ∪ shape connect reinforcing bar reserving hole channel, and 7- ∪ shape connects reinforcing bar, 8- epoxy resin adhesive, 9- grouting
Duct, 10- (concret block bottom surface) enclosing.
Specific embodiment
The utility model is described further below in conjunction with drawings and examples.
The embodiment is to construct prestressing force assembled anticollision on one 30+40+30 three-span continuous girder bridge of certain upper river
Wall.
The anti-collision wall of the bridge two sides respectively by upper and lower two prestressed strands 4, (walk along longitudinal direction by bridge combined with Figure 1 and Figure 2,
To) 20 pieces of compositions of L shape concret blocks 1 of concatenation；Concret block passes through asymmetric ∪ shape (the i.e. phase of ∪ of three genesis analysis
To both sides are longer on one side, another side is shorter) connection reinforcing bar 7 connect with bridge wing plate 2, concret block bottom surface on bridge wing plate
The epoxy resin adhesive 8 of 20mm is perfused between surface；
The concret block longitudinal length is 2m, is highly 1100mm, and top transverse width is 300mm, and bottom surface is lateral
Length is 800mm, the back side and plane perpendicular, positive lower part be with plane perpendicular, highly be 200mm facade, front upper is
Facade and concret block top surface inner edge are connected into 135 ° of bending side.Longer section of height of ∪ shape connection reinforcing bar be
1100mm, away from concret block back side 60mm, upper end is apart from concret block top surface 160mm；The flat segments of ∪ shape connection reinforcing bar
Length is 540mm, and apart from bridge wing plate upper surface 90mm, the relatively short section height that ∪ shape connects reinforcing bar is 290mm, and upper end distance is mixed
Solidifying soil block body front 110mm, 3 ∪ shape connection reinforcing bar longitudinal direction fore-and-aft clearances are respectively 600mm, and forward and backward connection reinforcing bar is away from coagulation
Distinguish 400mm in soil block body front and rear end.Two prestressed strands up and down are located at concret block end face center and mix
On the vertical line of solidifying soil block body bottom surface, top prestressed strand is 800mm, lower part prestressing force at a distance from concret block bottom surface
Steel beam is 250mm at a distance from concret block bottom surface.
In conjunction with Fig. 1 to Fig. 4, the construction method of the bridge-collision-avoidance wall is sequentially included the following steps:
1, prefabricated ∪ shape connects reinforcing bar
Use diameter for 10mm, model HRB335 reinforcing bar by ∪ shape connect reinforcing bar shape and size it is prefabricated construct it is anti-
The required amount of ∪ shape connection reinforcing bar of wall is hit, it is spare；
2, precast concrete block
Concret block is prefabricated by bridge two sides anti-collision wall requirement in factory, amounts to 40 pieces, every block concrete block
Body utilizes template placement layer by layer with size in shape, and makes the enclosing 10 that its bottom periphery is 20mm with height；It is pouring
In the process using sebific duct core pulling method be respectively formed in concret block can be prefabricated with step 1 ∪ shape connect the ∪ of reinforcing bar grafting
The prestressed strand reserving hole channel 3 and a upper and lower opening that shape connects reinforcing bar reserving hole channel 6, passes through for two prestressed strands
It is located at the skewed grouting duct 9 of concret block front lower part and bottom surface；Wherein ∪ shape connects reinforcing bar reserving hole channel
Aperture is 12mm, and back segment (close to one section of the concret block back side) is away from concret block back side 60mm, upper end right-angle bending
It is opened on the back side of concret block, the leading portion that ∪ shape connects reinforcing bar reserving hole channel is blind hole；The aperture in grouting duct is
20mm, on the inclined-plane of concret block front lower part, lower section is opened at the center of concret block bottom surface upper end opening, with
Concret block bottom surface is at 60 ° of angles；
3, when pouring bridge main beam, in bridge wing plate according to the prefabricated concret block of step 2 in bridge wing plate
Installation site (back side of concret block maintains an equal level with the outer rim of bridge wing plate) prefabricated ∪ shape of pre-buried step 1 connect reinforcing bar, makes
∪ shape connects longer section of reinforcing bar and is each perpendicular to bridge wing plate upper surface compared with short section, and connects respectively with ∪ shape in concret block
The leading portion and back segment for connecing reinforcing bar reserving hole channel correspond, and make the flat segments of ∪ shape connection reinforcing bar away from bridge wing plate upper surface
90mm；
4, assembling concret block forms anti-collision wall
20 prefabricated block concrete blocks of step 2 are connect with the ∪ shape on bridge wing plate one by one by reinforcing bar pair using lift-on/lift-off system
It connects；Then two prestressed strands made of 5 model steel strand wires of 9-7 Φ are used, are each passed through on 20 block concrete blocks
Prestressed strand preformed hole, with centre-hole jack tensioning, the control stress for prestressing of prestressed strand is 1310MPa when tensioning,
It is anchored after tensioning with M15-N prestressed anchor 5, cement slurry mud jacking is carried out to prestressed strand reserving hole channel；
Then it is in the milk one by one to 20 concret blocks, takes the filling on funnel pressure grouting normal direction concret block
Slurry duct pours into epoxy resin adhesive, when enclosing and the bridge wing of the epoxy resin adhesive full of concret block bottom periphery
The space that plate upper surface is formed connects reinforcing bar reserving hole channel with ∪ shape, and pre- from the ∪ shape connection reinforcing bar on the concret block back side
Stop grouting when upper end opening of boxing out is overflowed, the upper port in duct of being in the milk is blocked；Complete constructing for bridge side anti-collision wall；
After completing the constructing of bridge other side anti-collision wall in the same way, add cement veneers in the outside of anti-collision wall, completes
The bridge bilateral anti-collision wall is constructed.
Claims (2)
1. a kind of prestressing force assembled anti-collision wall, which is characterized in that the L concatenated along longitudinal direction by upper and lower two prestressed strands (4)
Shape concret block (1) composition；Concret block passes through the one group of asymmetric ∪ shape being longitudinally evenly spaced on connection reinforcing bar (7)
It is connect with bridge wing plate (2), epoxy resin adhesive (8) is perfused between concret block bottom surface and bridge wing plate upper surface.
2. prestressing force assembled anti-collision wall according to claim 1, which is characterized in that the concret block longitudinal length
It is highly 1000~1300mm for 2.0m~4.0m, top 250~320mm of transverse width, bottom surface lateral length 800~
950mm；Longer section of the ∪ shape connection reinforcing bar is away from 50~60mm of the concret block back side, and upper end is apart from concret block top surface
150~160mm；∪ shape connects the relatively short section of reinforcing bar away from concret block front 100~150mm of root edge, and upper end is apart from concrete
100~120mm of block front；∪ shape connects the flat segments of reinforcing bar apart from bridge wing plate 80~100mm of upper surface；Two above and below described
Root prestressed strand is located on the vertical line of concret block end face center and concret block bottom surface, top prestress steel
Beam is 700~800mm at a distance from concret block bottom surface, and lower part prestressed strand is at a distance from concret block bottom surface
200~250mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822130781.2U CN209338990U (en) | 2018-12-18 | 2018-12-18 | A kind of prestressing force assembled anti-collision wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822130781.2U CN209338990U (en) | 2018-12-18 | 2018-12-18 | A kind of prestressing force assembled anti-collision wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209338990U true CN209338990U (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822130781.2U Expired - Fee Related CN209338990U (en) | 2018-12-18 | 2018-12-18 | A kind of prestressing force assembled anti-collision wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440632A (en) * | 2018-12-18 | 2019-03-08 | 沈阳建筑大学 | A kind of prestressing force assembled anti-collision wall and its construction method |
-
2018
- 2018-12-18 CN CN201822130781.2U patent/CN209338990U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440632A (en) * | 2018-12-18 | 2019-03-08 | 沈阳建筑大学 | A kind of prestressing force assembled anti-collision wall and its construction method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190903 Termination date: 20201218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |