CN114427193B - Anchored UHPC curved surface anti-collision guardrail for splash zone bridge and construction method thereof - Google Patents

Anchored UHPC curved surface anti-collision guardrail for splash zone bridge and construction method thereof Download PDF

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Publication number
CN114427193B
CN114427193B CN202210241511.7A CN202210241511A CN114427193B CN 114427193 B CN114427193 B CN 114427193B CN 202210241511 A CN202210241511 A CN 202210241511A CN 114427193 B CN114427193 B CN 114427193B
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uhpc
guardrail
anchored
zone
main body
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CN114427193A (en
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张阳
余俊杰
张轶
邱俊峰
刘林石水
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Hunan University
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Hunan University
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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
    • E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
    • E01D19/103—Parapets, railings ; Guard barriers or road-bridges
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
    • E01F15/143—Protecting devices located at the ends of barriers

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

The invention discloses an anchored UHPC curved surface anti-collision guardrail of a bridge in a splash zone, which comprises an UHPC guardrail main body and an UHPC pouring belt, wherein an anchoring zone is formed by sinking the edge position of a bridge girder, the UHPC guardrail main body comprises a guardrail base, a stiffening rib, a first fixing part and a second fixing part which are integrally processed and formed by UHPC materials, the guardrail base comprises an impact surface and a back surface, the impact surface is a curved surface sinking towards the direction far away from the splash zone, the stiffening rib is arranged on the back surface, the first fixing part and the side wall of the girder at one side of the splash zone are anchored by a transverse bolt, the second fixing part and the bottom of the anchoring zone are anchored by a vertical bolt, the UHPC guardrail main body and the side wall of the anchoring zone are separated to form a pouring zone, the UHPC pouring belt is poured in the pouring zone, and the UHPC pouring belt completely covers the second fixing part. The invention further provides a construction method of the anchored UHPC curved surface anti-collision guardrail for the bridge in the splash zone. The anchored UHPC curved surface anti-collision guardrail for the bridge in the splash zone has the advantages of short construction period and long service life.

Description

Anchored UHPC curved surface anti-collision guardrail for splash zone bridge and construction method thereof
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of anti-collision guardrails of bridges, in particular to an anchored UHPC curved surface anti-collision guardrail of a bridge in a splash zone and a construction method thereof.
[ background of the invention ]
The anti-collision guardrail of the bridge is an important protection facility for guaranteeing the running safety of vehicles and the property safety of surrounding personnel in the operation stage of the bridge. With the improvement of the national highway construction level and requirements, the application of the bridge in the sea area and the coastal wave splashing area is increasingly and frequently.
In the related technology, the anti-collision guardrail of the bridge is mostly formed by common concrete cast-in-place, and under the long-term wave load and dry-wet cycle action in a coastal splash zone, the phenomena of surface peeling, concrete damage and cracking, internal steel bar corrosion and the like of the anti-collision guardrail can be easily caused by the common concrete, so that the attractive effect of the bridge guardrail can be influenced, the protection capability of the guardrail is seriously reduced, and great threats are brought to personnel and vehicles; adopt cast-in-place mode simultaneously, the construction of anticollision barrier and bridge girder can not go on simultaneously, and new and old concrete handing-over department intensity is not enough, receives the vehicle striking after, appears layering fracture easily, has the potential safety hazard to cast-in-place needs through a series of construction processes such as reinforcing bar processing and ligature, template preparation and installation, concrete placement and maintenance, drawing of patterns, and the construction process many cycles is long. Therefore, it is necessary to provide an anchored UHPC curved crash barrier for a bridge in a splash zone and a construction method thereof to solve the above problems.
[ summary of the invention ]
The invention aims to solve the technical problem of providing an anchored UHPC curved surface anti-collision guardrail of a bridge in a splash zone and a construction method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an anchored UHPC curved surface anti-collision guardrail of a bridge in a splash zone comprises an UHPC guardrail main body and an UHPC pouring belt, wherein an anchoring zone is formed in the edge position of a bridge girder in a concave manner, the bottom of the UHPC guardrail main body is correspondingly anchored on the anchoring zone, the UHPC guardrail main body comprises a guardrail base, a stiffening rib, a first fixing part and a second fixing part which are integrally processed and formed by UHPC materials, the guardrail base comprises an impact surface and a back surface, the impact surface is positioned on one side facing the splash zone and used for receiving wave impact, the back surface is arranged opposite to the impact surface, the impact surface is a curved surface concave in the direction far away from the splash zone, the stiffening rib is arranged on the back surface, the first fixing part is arranged at the bottom of the guardrail base and positioned on one side close to the impact surface, and the first fixing part and the side wall of the girder on one side of the splash zone are anchored through a transverse bolt, the second fixing part is arranged at the bottom of the stiffening rib, the second fixing part is anchored with the bottom of the anchoring area through a vertical bolt, a pouring area is formed between the UHPC guardrail main body and the side wall of the anchoring area at intervals, the UHPC pouring belt is poured in the pouring area, and the UHPC pouring belt completely covers the second fixing part.
Preferably, the impact surface comprises a first arc-shaped surface and a second arc-shaped surface, the first arc-shaped surface is located above the second arc-shaped surface, the connection position of the first arc-shaped surface and the second arc-shaped surface is in smooth transition, and the tangent line of the intersection point of the first arc-shaped surface and the second arc-shaped surface is arranged along the vertical direction.
Preferably, the rounded angle α of the first arc-shaped surface 1 Has a value range of 25 to 30 DEG, and a radius R 1 The value range of (a) is 1.8-2.4 m; rounded angle alpha of the second arc-shaped face 2 The value range of (A) is 25-45 degrees, and the radius R is 2 The value range of (A) is 0.45-0.7 m.
Preferably, the impact surface is provided with a plurality of holes of permeating water in a penetrating manner towards the back direction, and the axes of the holes of permeating water are arranged along the horizontal direction.
Preferably, a plurality of vertical steel bars are pre-embedded in the bottom of the UHPC guardrail main body and are arranged at the bottom of the guardrail base or the bottom of the stiffening rib, steel bar holes corresponding to the vertical steel bars are formed in the bottom of the anchoring area in a concave mode, the vertical steel bars are correspondingly inserted into the steel bar holes, and RPC inorganic glue is filled in gaps between the vertical steel bars and the steel bar holes.
Preferably, a plurality of transverse steel bars are pre-embedded in the back of the UHPC guardrail main body, the transverse steel bars are located in the pouring area, transverse reserved steel bars are arranged at positions of the main beam corresponding to the transverse steel bars, the transverse steel bars and the transverse reserved steel bars are welded and fixed, and the UHPC pouring belt completely covers the transverse steel bars and the transverse reserved steel bars.
Preferably, the connection interface between the bottom of the UHPC guardrail body and the anchoring zone is coated with RPC inorganic glue.
Preferably, the bottom of the UHPC guardrail main body and the connection interface of the anchoring area are provided with engaging structures of a boss and a groove to form limiting and limit the UHPC guardrail main body to shake.
The invention also provides a construction method of the anchored UHPC curved surface anti-collision guardrail of the splash zone bridge, which comprises the following steps:
s1: prefabricating the UHPC guardrail main body and transporting to a construction site;
s2: pouring RPC inorganic glue into a steel bar hole of the main beam, coating the RPC inorganic glue at the bottom of the anchoring area, hoisting the UHPC guardrail main body to the position above the anchoring area, aligning and inserting vertical steel bars on the UHPC main body with the steel bar hole of the main beam until the UHPC guardrail main body is attached and bonded with the bottom of the anchoring area, and forming fixation after the RPC inorganic glue is dried;
s3: the first fixing part and the side wall of the main beam on one side of the splash zone are anchored by the transverse bolts, and the second fixing part and the bottom of the anchoring zone are anchored by the vertical bolts;
s4: and welding and fixing the transverse steel bars on the UHPC main body and the transverse reserved steel bars of the girder, pouring UHPC slurry in the pouring area until the top surface of the girder is flush, and forming the UHPC pouring belt after solidification, wherein the UHPC pouring belt completely covers the second fixing part, the transverse steel bars and the transverse reserved steel bars.
Compared with the related art, the invention has the beneficial effects that:
(1) the UHPC guardrail main body and the UHPC pouring belt are both made of UHPC materials, so that the strength is high, cracking is not easy to occur, and the service life is long;
(2) the impact surface adopts a curved surface design, and the water permeable holes are additionally arranged, so that the flow guide and weakening of waves can be realized, the impact force of the waves is reduced, the durability and the stability are better, and the later maintenance is reduced;
(3) the UHPC guardrail main body is prefabricated in a factory, and is assembled on site after maintenance is finished, so that the construction mode is quick and convenient, and the construction period is shortened;
(4) the UHPC pouring belt is used for coating the second fixing part and the transverse steel bar to form a self-locking structure, so that the anti-collision performance of the vehicle can be improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural view of an anchored UHPC curved crash barrier for a splash zone bridge according to the present invention;
FIG. 2 is a schematic perspective view of a UHPC fence body;
FIG. 3 is a schematic view of an installation structure of an anchored UHPC curved crash barrier for a splash zone bridge according to the present invention;
FIG. 4 is a schematic structural diagram of an impact surface at different concavity values;
FIG. 5 is a parametric plot of the strike face;
FIG. 6 is a force analysis diagram of the anchored UHPC curved crash barrier for a bridge in a splash zone when being impacted by a vehicle.
[ detailed description ] embodiments
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features and advantages of the present invention more comprehensible, specific embodiments thereof will be described below with reference to the accompanying drawings of the present application.
Referring to fig. 1-6, the present invention provides an anchored UHPC curved crash barrier 100 for a bridge in a splash zone, which is mounted on a main beam 200 of the bridge. The anchored UHPC curved surface anti-collision guardrail 100 of the splash zone bridge comprises a UHPC guardrail main body 10 and UHPC pouring belts 20, an anchoring zone 210 is formed at the edge position of a main beam 200 in a recessed mode, the UHPC guardrail main body 10 is correspondingly anchored on the anchoring zone 210, pouring zones 220 are formed at intervals between the UHPC guardrail main body 10 and the side walls of the anchoring zone 210, and the UHPC pouring belts 20 are poured in the pouring zones 220.
The UHPC barrier main body 10 includes a barrier base 11, a stiffener 12, a first fixing portion 13, and a second fixing portion 14. Guardrail base 11, stiffening rib 12, first fixed part 13 and second fixed part 14 adopt UHPC material integrated into one piece, stable in structure. The UHPC material has ultrahigh strength performance, is not easy to crack, has long service life and can reduce the maintenance cost. In practical application, the UHPC guardrail main body 10 can be prefabricated in a factory and then transported to a construction site to be installed, compared with a mode of pouring concrete in situ, the method can reduce the pouring process on one hand, and on the other hand, the method does not need to wait for the hardening of the concrete, so that the construction period can be greatly shortened.
Guardrail base 11 including be located towards splash zone one side and be used for accepting the impact face 111 that the wave is assaulted and with the back 112 that the impact face set up relatively, impact face 111 for keeping away from the sunken curved surface of splash zone direction, impact face 111 includes first arcwall face 1111 and second arcwall face 1112, first arcwall face 1111 is located the top of second arcwall face 1112, first arcwall face 1111 with the hookup location smooth transition of second arcwall face 1112, first arcwall face 1111 with the tangent line of second arcwall face 1112 intersection sets up along vertical direction.
When the waves impact the guardrail, the horizontal inertia force of the waves can be decomposed into a component force perpendicular to the direction of the curved surface and a component force along the tangential direction of the curved surface according to the momentum conservation principle, wherein the component force along the tangential direction of the curved surface drives the waves to flow along the curved surface, and finally the effects of backflow and wave opposite impact are achieved; the inertial force in the direction perpendicular to the curved surface will be borne by the guardrail base 11. A stress analysis model is established, and analysis shows that the concave value c of the impact surface 111 has a main influence on the effect of attenuating the impact force of waves, wherein the concave value c of the impact surface 111 refers to the concave depth of the impact surface 111 and can be used for representing the bending degree of the impact surface 111.
When the concave value c is smaller, the impact surface 111 is closer to a straight surface, and the effect of weakening the impact force of waves cannot be achieved; referring to FIG. 3, when the inner concave value c is larger, there are two cases (the inner concave value in the standard state is c) 0 )：
(1) The top of the impact surface 111 is inclined to the left, at which point the concavity value c 1 ＞c 0 This situation can result in the center of the guardrail being remote outside the bridge width and thus aligned with the main beam 200Additional bending moment is generated, which increases the load of the main beam 200;
(2) the middle position of the impact surface 111 is convex to the right, the concave value c 2 ＞c 0 The condition can lead to the guardrail wholly to occupy the bridge floor width too big, causes the waste of bridge floor space.
Therefore, in order to avoid the concavity value c being too large or too small, the rounded angle α of the first arc-shaped surface 1111 is 1 The value range of (A) is 25-30 degrees, and the radius R is 1 The value range of (a) is 1.8-2.4 m; rounded angle α of the second arcuate surface 1112 2 Has a value range of 25-45 DEG, and a radius R 2 The value range of (a) is 0.45-0.7 m. The upper part of the impact surface 111 is relatively gentle, so that a larger protection area can be obtained, and the condition that the waves directly impact pedestrians or vehicles on the bridge surface is prevented; the impact surface 112 is relatively steep below it to increase the speed of wave return.
Furthermore, a plurality of water permeable holes 113 are formed through the impact surface 111 in the direction of the rear surface 112, and the axes of the water permeable holes 113 are arranged in the horizontal direction. The arrangement of the water permeable holes 113 can reduce the impact area of waves and reduce the impact load of the waves. And the selection of the concave value c is combined, so that the impact of waves on the guardrail is reduced from two angles of diversion and weakening, the impact load of the waves can be reduced by 18-20%, and the service life of the guardrail is greatly prolonged.
The stiffening ribs 12 are arranged on the back surface 112 and used for enhancing the overall strength of the UHPC guardrail main body 10, the number of the stiffening ribs 12 is multiple, and the stiffening ribs 12 are arranged at equal intervals.
The first fixing portion 13 is disposed at the bottom of the guardrail base 11 and located at a side close to the impact surface 111, and the first fixing portion 13 and the side wall of the main beam 210 located at a side of a splash zone are anchored by a transverse bolt 15.
The second fixing portions 14 are disposed at the bottom of the stiffener 12, and the second fixing portions 14 are anchored to the bottom of the anchoring area 210 by vertical bolts 16.
The bottom of the UHPC guardrail main body 10 is also pre-embedded with a plurality of vertical steel bars 17, and the vertical steel bars 17 may be disposed at the bottom of the guardrail base 11 or at the bottom of the stiffening ribs 12, which is not limited in this embodiment. The sunken with of bottom in anchor district 210 with the corresponding reinforcing bar hole of vertical reinforcing bar 17, vertical reinforcing bar 17 correspond to arrange in the reinforcing bar is downthehole, vertical reinforcing bar 17 with clearance packing between the reinforcing bar hole has the inorganic glue of RPC, the inorganic glue of RPC plays on the one hand and fills fixed action, and on the other hand can also play the effect of separation air and water, makes its inside vertical reinforcing bar 17 difficult corrosion rust.
A plurality of transverse steel bars 18 are embedded in the back surface 112 of the UHPC guardrail main body 10, the transverse steel bars 18 are located in the pouring area 220, transverse reserved steel bars 230 are arranged at positions of the main beam 200 corresponding to the transverse steel bars 18, and the transverse steel bars 18 and the transverse reserved steel bars 230 are welded and fixed to bear force together. After the transverse steel bars 18 and the transverse reserved steel bars 230 are welded, the UHPC pouring belt 20 is poured to form a reinforced concrete structure, so that the UHPC guardrail main body 10 and the main beam 200 are connected into a whole, the stress can be jointly applied, and the anti-collision capacity to vehicles is greatly improved. Referring to fig. 6, when a vehicle collides with the guardrail, an impact force F from a head of the vehicle directly acts on the guardrail base 11, a weight P of the vehicle is loaded on the UHPC casting belt 20 and acts on the UHPC guardrail main body 10 through the transverse steel bars 18 and the second fixing portions 14, and at this time, a maximum shearing force at the guardrail main body 10 is located at a joint position of the reinforcing rib 12 and the second fixing portions 14, and since the guardrail main body 10 is integrally formed by using the UHPC material, the ultra-strong strength provided by the UHPC material can ensure that the position is not broken. Meanwhile, the weight P of the vehicle can be loaded on the UHPC pouring belt 20 to form resistance for the UHPC guardrail main body 10 to be separated from the main beam 200, so that the UHPC guardrail main body 10 is limited to be separated from the main beam 200, a self-locking effect is formed, and the UHPC guardrail main body 10 is prevented from being separated from the main beam 200 after being impacted by the vehicle.
Further, the connection interface between the bottom of the UHPC barrier main body 10 and the anchoring area 210 can be coated with RPC inorganic glue, so as to increase the connection reliability between the UHPC barrier main body 10 and the main beam 200.
Furthermore, the connection interface between the bottom of the UHPC guardrail main body 10 and the anchoring area 210 can be further provided with a boss and groove engaging structure to form a limit position, so as to limit the UHPC guardrail main body 10 from shaking.
The invention also provides a construction method of the anchored UHPC curved surface anti-collision guardrail of the splash zone bridge, which comprises the following steps:
s1: prefabricating a UHPC guardrail main body and transporting to a construction site;
s2: pouring RPC inorganic glue into a steel bar hole of the main beam, coating the RPC inorganic glue at the bottom of the anchoring area, hoisting the UHPC guardrail main body to the position above the anchoring area, aligning and inserting vertical steel bars on the UHPC main body with the steel bar hole of the main beam until the UHPC guardrail main body is attached and bonded with the bottom of the anchoring area, and forming fixation after the RPC inorganic glue is dried;
s3: the first fixing part and the side wall of the main beam, which is positioned on one side of the splash zone, are anchored by the transverse bolt, and the second fixing part and the bottom of the anchoring zone are anchored by the vertical bolt;
s4: and welding and fixing the transverse steel bars on the UHPC main body and the transverse reserved steel bars of the girder, pouring UHPC slurry in the pouring area until the top surface of the girder is flush, and forming the UHPC pouring belt after solidification, wherein the UHPC pouring belt completely covers the second fixing part, the transverse steel bars and the transverse reserved steel bars.
Compared with the related art, the invention has the beneficial effects that:
(1) the UHPC guardrail main body and the UHPC pouring belt are both made of UHPC materials, so that the strength is high, cracking is not easy to occur, and the service life is long;
(2) the impact surface adopts a curved surface design, and the water permeable holes are additionally arranged, so that the flow guide and weakening of waves can be realized, the impact force of the waves is reduced, the durability and the stability are better, and the later maintenance is reduced;
(3) the UHPC guardrail main body is prefabricated in a factory, and is assembled on site after maintenance is finished, so that the construction mode is quick and convenient, and the construction period is shortened;
(4) the UHPC pouring belt is used for coating the second fixing part and the transverse steel bar to form a self-locking structure, so that the anti-collision performance of the vehicle can be improved.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.

Claims (8)

1. An anchored UHPC curved surface anti-collision guardrail of a bridge in a splash zone is characterized by comprising an UHPC guardrail main body and an UHPC pouring belt, wherein an anchoring zone is formed by sinking the edge position of a bridge girder, the bottom of the UHPC guardrail main body is correspondingly anchored on the anchoring zone, the UHPC guardrail main body comprises a guardrail base, a stiffening rib, a first fixing part and a second fixing part which are integrally processed and formed by UHPC materials, the guardrail base comprises an impact surface and a back surface, the impact surface is positioned on one side facing the splash zone and used for receiving wave impact, the back surface is arranged opposite to the impact surface, the impact surface is a curved surface sunk in the direction far away from the splash zone, the impact surface comprises a first arc-shaped surface and a second arc-shaped surface, the first arc-shaped surface is positioned above the second arc-shaped surface, the connecting position of the first arc-shaped surface and the second arc-shaped surface is in smooth transition, the tangent line of the intersection point of the first arc-shaped surface and the second arc-shaped surface is arranged along the vertical direction, the stiffening rib is arranged on the back face, the first fixing portion is arranged at the bottom of the guardrail base and is located on one side close to the impact face, the first fixing portion and the side wall, located on one side of a splash zone, of the main beam are anchored through a transverse bolt, the second fixing portion is arranged at the bottom of the stiffening rib, the second fixing portion and the bottom of the anchoring zone are anchored through a vertical bolt, pouring zones are formed between the UHPC guardrail body and the side wall of the anchoring zone at intervals, the UHPC pouring zone is poured in the pouring zones, and the UHPC pouring zone completely covers the second fixing portion.
2. The anchored UHPC curved crash barrier of claim 1, wherein the first arcuate surface has a central angle α 1 Has a value range of 25 to 30 DEG, and a radius R 1 The value range of (A) is 1.8-2.4 m; central angle alpha of the second arc-shaped surface 2 Has a value range of 25-45 DEG, and a radius R 2 The value range of (A) is 0.45-0.7 m.
3. The anchored UHPC curved crash barrier of claim 2, wherein the impact surface is perforated with a plurality of water permeable holes in the direction of the back surface, and the axes of the water permeable holes are arranged along the horizontal direction.
4. The anchored UHPC curved crash barrier for the bridge in the splash zone as claimed in claim 3, wherein a plurality of vertical steel bars are pre-embedded in the bottom of the UHPC barrier main body, the vertical steel bars are arranged at the bottom of the barrier base or the bottom of the stiffening rib, a steel bar hole corresponding to the vertical steel bar is formed in the bottom of the anchoring zone in a concave manner, the vertical steel bar is correspondingly inserted into the steel bar hole, and RPC inorganic glue is filled in the gap between the vertical steel bar and the steel bar hole.
5. The anchored UHPC curved crash barrier of claim 4, wherein a plurality of transverse steel bars are pre-embedded in the back of the UHPC barrier main body, the transverse steel bars are located in the casting area, transverse reserved steel bars are arranged at positions of the main beam corresponding to the transverse steel bars, the transverse steel bars and the transverse reserved steel bars are welded and fixed, and the UHPC casting belt completely covers the transverse steel bars and the transverse reserved steel bars.
6. The anchored UHPC curved crash barrier of claim 5, wherein the connecting interface between the bottom of the UHPC barrier body and the anchoring zone is coated with RPC inorganic glue.
7. The anchored UHPC curved anti-collision guardrail for the bridge in the splash zone as claimed in claim 6, wherein a connecting interface between the bottom of the UHPC guardrail main body and the anchoring zone is provided with a boss and groove meshing structure to form a limiting position and limit the UHPC guardrail main body to swing.
8. The construction method of the anchored UHPC curved crash barrier of the splash zone bridge, which is characterized by comprising the following steps:
s1: prefabricating a UHPC guardrail main body and transporting to a construction site;
s2: pouring RPC inorganic glue into a steel bar hole of the main beam, coating the RPC inorganic glue at the bottom of the anchoring area, hoisting the UHPC guardrail main body to the position above the anchoring area, aligning and inserting vertical steel bars on the UHPC guardrail main body with the steel bar hole of the main beam until the UHPC guardrail main body is attached and bonded with the bottom of the anchoring area, and forming fixation after the RPC inorganic glue is dried;
s3: the first fixing part and the side wall of the main beam, which is positioned on one side of the splash zone, are anchored by the transverse bolt, and the second fixing part and the bottom of the anchoring zone are anchored by the vertical bolt;
s4: and welding and fixing the transverse steel bars on the UHPC guardrail main body and the transverse reserved steel bars of the main beam, pouring UHPC slurry in the pouring area until the top surface of the main beam is level, and forming the UHPC pouring belt after solidification, wherein the UHPC pouring belt completely covers the second fixing part, the transverse steel bars and the transverse reserved steel bars.
CN202210241511.7A 2022-03-11 2022-03-11 Anchored UHPC curved surface anti-collision guardrail for splash zone bridge and construction method thereof Active CN114427193B (en)

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