CN107489098B - Concrete prefabricated welding type guardrail and installation construction method - Google Patents
Concrete prefabricated welding type guardrail and installation construction method Download PDFInfo
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- CN107489098B CN107489098B CN201710546775.2A CN201710546775A CN107489098B CN 107489098 B CN107489098 B CN 107489098B CN 201710546775 A CN201710546775 A CN 201710546775A CN 107489098 B CN107489098 B CN 107489098B
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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
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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
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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Abstract
The invention relates to a concrete prefabricated welding type guardrail and an installation construction method, and solves the defects that in the prior art, a bridge guardrail is constructed by adopting a cast-in-place method, a template needs to be installed, the construction period is long, the efficiency is low, and the template running phenomenon is easy to occur. The guardrails are prefabricated in a factory and connected on the bridge, so that the construction period on the bridge is shortened, the efficiency is high, a template does not need to be installed on the bridge, the template is not easy to run, the overhead working time is short, and the danger is reduced; the prefabricated guard bar is matched through the angle part, and the stress is reasonable; the prefabricated guardrail is connected through the welding of the connecting parts, and the guardrail is more convenient to install.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a concrete prefabricated welding type guardrail and an installation construction method.
Background
The bridge guardrail is an important safety protector as an accessory structure of a bridge. Bridge guardrails in the prior art are usually constructed by adopting a cast-in-place method, most of the existing highway bridge guardrails also adopt the cast-in-place guardrail type, and the cast-in-place method reflects the following defects in actual construction and operation:
1) the template installation is complicated, needs supplementary erection equipment, and the period is long, inefficiency, easily takes place the mode phenomenon of running.
2) The thickness change part is insufficiently vibrated and easily generates air bubbles due to upright pouring, and pitted surfaces on the surface of the guardrail are cracked more.
3) The workers on the spot work high above the ground, which has certain danger.
4) The protective layer is difficult to control, and the eaves part leaks thick liquid seriously.
Disclosure of Invention
The invention solves the defects that the bridge guardrail is constructed by adopting a cast-in-place method in the prior art, a template needs to be installed, the construction period is long, the efficiency is low, and the template running phenomenon is easy to occur, and provides the concrete prefabricated welded type guardrail and the installation construction method.
The invention also overcomes the defects that the existing bridge guardrail is constructed by adopting a cast-in-place method, belongs to long-time overhead operation and has certain danger, and provides the concrete prefabricated welded guardrail and the installation construction method.
The invention also solves the defect that the surface of the guardrail is cracked due to the fact that bubbles are easy to appear at the thickness change position caused by the fact that the existing bridge guardrail is constructed by adopting a cast-in-place method and needs to be vertically poured, and provides the concrete prefabricated welding type guardrail and the installation construction method.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a precast concrete welding type guardrail, includes prefabricated guardrail main part, the guardrail main part have with the angular form portion that the flange board in plate girder both sides combined together, the top of angular form portion is provided with the post-cast groove of reservation, the inside cloth of guardrail main part has the framework of steel reinforcement, the guardrail main part is provided with in the position of angular form portion and stretches out post-cast inslot and pre-buried connecting piece welded fastening's in the flange board adapting unit. The guardrail main body is prefabricated in a factory and connected on a bridge, so that the construction period on the bridge is shortened, the efficiency is high, a template does not need to be installed on the bridge, the template is not easy to run, the overhead working time is short, and the danger is reduced; the prefabricated guard bar is combined through the angular parts, so that the stress is reasonable; the prefabricated guardrail is provided with a connecting part which is fixedly welded with the connecting part on the flange plate of the plate girder, and the guardrail is more convenient to install through the welding connection of the connecting part.
Preferably, adapting unit is the structure of falling T, including mutually perpendicular fixed riser and diaphragm, the riser is mutually perpendicular with the length direction of guardrail main part, and the upper end of riser buries in the guardrail main part, and the both sides of the portion of burying of riser are connected with the splice bar, and the splice bar is fixed mutually with the framework of steel reinforcement in the guardrail main part.
Preferably, the connecting piece in the flange plate comprises a steel plate and an embedded rib fixed on the bottom surface of the steel plate, the embedded rib is embedded in the flange plate, part of the steel plate is positioned on the upper surface of the flange plate, and the embedded rib is U-shaped or L-shaped.
Preferably, the connecting part is connecting steel bars extending out of the post-pouring groove from the steel bar framework inside the guardrail main body, the number of the connecting steel bars extending out of the post-pouring groove is four, and the extending end parts of the four connecting steel bars are linear.
Preferably, the connecting piece in the flange plate is a U-shaped steel bar embedded in the flange plate, and two ends of the U-shaped steel bar extend out of the upper surface of the flange plate and are fixedly connected with the connecting steel bar in the post-cast groove in a lap-welding mode.
Preferably, the guardrail body is poured in an inverted mode, the guardrail body is provided with hanging holes, the hanging holes are formed in the two end face portions of the guardrail body, one guardrail body is provided with four hanging holes, and the four hanging holes are respectively formed in the upper portion and the lower portion of the end face portions of the two sides of the guardrail body.
As the preferred, prefabricated guardrail is prefabricated for the segmental structure, and during the installation, the relative side coating foamed rubber of adjacent guardrail is used for waterproof, is connected through steel pipe and the bolt to inserting between the two adjacent segmental type guardrails.
A mounting and construction method of a concrete prefabricated welding type guardrail comprises the following steps: (1) constructing a pre-embedded connecting piece of a plate girder flange plate, and prefabricating a guardrail in a factory;
(2) hoisting a section of guardrail on site and sitting on the flange plate;
(3) hoisting the next section of guardrail on site and connecting the next section of guardrail with the previous section of guardrail;
(4) after the hoisting of the first guardrail is finished, post-cast groove concrete pouring is carried out;
(5) and (5) repeating the steps (2) to (4) to complete the installation of the subsequent prefabricated guardrails.
Preferably, the guardrail factory prefabrication comprises: the method comprises the following steps of a installing a guardrail steel reinforcement framework, b installing an inner side template and an outer side template of a guardrail, c installing a lifting hole embedded part, d installing an end enclosure template, e checking and accepting, f pouring concrete in a layering mode, g detaching and repairing, h cleaning and maintaining.
Preferably, before hoisting on site, the elevation needs to be measured at the position of the guardrail resting point on the top surface of the beam slab, the beam slab is placed at the side line position of the prefabricated guardrail, and the mark is made; when the guardrail is installed, the contact position of the guardrail and the upper surface of the flange plate is connected by adopting mortar, and the connecting part and the connecting piece are welded and fixed after the prefabricated guardrail is positioned; and the post-cast groove pouring adopts a twice pouring method, the first post-cast groove concrete and the bridge deck pavement concrete are synchronously poured and enough allowance is reserved, and the second post-cast groove concrete is poured after the bridge deck concrete is poured, the rest post-cast groove part of concrete is poured on the top edge of the bridge deck by adopting a grouting method and the rest post-cast groove opening is sealed.
The invention has the beneficial effects that: the guardrails are prefabricated in a factory and connected on the bridge, so that the construction period on the bridge is shortened, the efficiency is high, a template does not need to be installed on the bridge, the template is not easy to run, the overhead working time is short, and the danger is reduced; the prefabricated guard bar is matched through the angle part, and the stress is reasonable; the prefabricated guardrail is provided with connecting parts which are connected and fixed with the connecting parts on the flange plates of the plate girder, and the guardrail is more convenient to install through the connection of the connecting parts.
Drawings
FIG. 1 is a schematic diagram of one configuration of the present invention;
FIG. 2 is a schematic view of an installation of the present invention;
FIG. 3 is a schematic view of the installation of a second configuration of the present invention;
FIG. 4 is a schematic view of the connection of adjacent segment prefabricated guard rails according to the present invention;
FIG. 5 is a side view of a connection of the present invention;
in the figure: 1. the guardrail comprises a guardrail main body, 2, lifting holes, 3, connecting ribs, 4, vertical plates, 5, transverse plates, 6, post-cast grooves, 7, angular parts, 8, a bridge deck, 9, T-shaped beams, 10, flange plates, 11, steel plates, 12, embedded ribs, 13, diagonal ribs, 14, connecting steel bars, 15, U-shaped steel bars, 16, a steel bar framework, 17, foamed glue, 18, mortar, 19, steel pipes, 20 and bolts.
Detailed Description
The technical solution of the present invention is further specifically described below by using specific embodiments and with reference to the accompanying drawings.
Example (b): the utility model provides a precast concrete welded type guardrail (refer to fig. 1), includes precast concrete welded type guardrail main part 1, and the guardrail main part has the angular form portion 7 that combines together with T roof beam both sides flange board, and the top of angular form portion is provided with the empty post-cast groove 6 of reserving, and the inside cloth of guardrail main part has framework of steel reinforcement 16, and the guardrail main part is provided with the adapting unit who stretches out in post-cast groove and pre-buried connecting piece welded fastening in the flange board in the position of angular form portion.
Adapting unit is for falling T shape structure, including mutually perpendicular fixed riser 4 and diaphragm 5, the riser is mutually perpendicular with the length direction of guardrail main part, and in the guardrail main part was buried to the upper end of riser, the both sides of the portion of burying of riser were connected with splice bar 3, and the splice bar is fixed mutually with the framework of steel reinforcement in the guardrail main part.
The connecting piece (see figure 2) in the flange plate comprises a steel plate 11 and an embedded rib 12 fixed on the bottom surface of the steel plate, the embedded rib is embedded in the flange plate, part of the steel plate is positioned on the upper surface of the flange plate, and the embedded rib is U-shaped. The U-shaped embedded ribs are fixedly connected with the reinforcing steel bars in the flange plates, and the U-shaped embedded ribs are fixed with the reinforcing steel bars before the flange plates are poured.
The guardrail main part adopts the inversion formula to pour, and the guardrail main part is provided with lewis hole 2, and lewis hole is in the both ends face position of guardrail main part, and a guardrail main part has four lewis holes, and four lewis holes are in the upper portion and the lower part of guardrail main part both sides terminal surface position respectively, and wherein have inserted steel pipe 19 in the lewis hole on guardrail main part upper portion. The prefabricated guardrail is prefabricated for the segmental structure.
A method for installing and constructing a precast concrete welded guardrail (see fig. 2, 4 and 5), comprising the following steps:
(1) the method comprises the following steps of constructing a pre-embedded connecting piece of a T-shaped beam flange plate, prefabricating a guardrail in a factory, pre-embedding U-shaped embedded ribs at a position 15cm away from the edge of the flange plate when prefabricating the T-shaped beam flange plate, wherein the distance between the U-shaped embedded ribs is 10cm, the embedded ribs are exposed on the upper surface of the flange plate by 20cm, the types of the U-shaped embedded ribs are No. 16 deformed steels, and the embedded ribs are fixed by adopting stay wires in a positioning mode, so that the embedded ribs are ensured to be at the; prefabricated guardrail standard segment is controlled according to 5 meters festival, and the guardrail template also adopts the typical forms, earlier with guardrail framework of steel reinforcement according to regulation size and position requirement install at the typical forms shelf location, then install skeleton integral hoisting on pouring the pedestal, assemble the guardrail template, carry out the construction of pouring of concrete, during the erection template, notice guardrail embedded steel bar or lead to the embedded position of long embedded steel plate to need pre-buried accuracy, prefabricated guardrail process flow is as follows: a, installing a guardrail steel reinforcement framework, b, installing an inner side template and an outer side template of the guardrail, c, installing a lifting hole embedded part, d, installing an end socket template, e, checking and accepting, f, pouring concrete in a layering manner, g, removing the template, refitting, h, cleaning and maintaining; after the form of the guardrail is removed, temporary supporting is carried out by adopting a temporary supporting rod piece, watering maintenance is carried out, after the concrete reaches the strength of 7 days, the guardrail is turned over by adopting a gantry crane and is stacked in a centralized way;
(2) hoisting a section of guardrail on site and sitting on the flange plate; the guardrail is transported to a hole position to be installed on a bridge from a prefabrication field through a trestle bridge by adopting a special transport vehicle for the prefabricated guardrail with 10 tons of vehicle-mounted cranes (the weight of a single guardrail is about 5.8 tons), the guardrail is installed on the bridge floor by adopting a vehicle-mounted crane on the transport vehicle, lifting holes 2 on the guardrail main body are lifted simultaneously, so that the guardrail is upwards located on a temporary support of the bridge floor, and then the guardrail is sleeved and lifted by adopting a guardrail installation sling, so that the guardrail is stably located on a flange plate of a beam plate; the thickness of the steel plate is adjusted by inserting the gap between the transverse plate of the guardrail main body and the steel plate on the flange plate, and 2 automatic electric welding machines are adopted for welding at the same time, so that full welding of welding seams is ensured; before installation, the elevation needs to be measured at the position of a resting point on the top surface of the beam slab, the beam slab is placed at the side line position of the prefabricated guardrail, and the mark is made; if the elevation at the resting point is out of limit or uneven, the elevation needs to be processed in advance; after the prefabricated guardrail is lifted, only the bottom 10cm of the prefabricated guardrail is placed at the edge of the flange plate, and at the moment, a crane is adopted for preliminary positioning, and the lifting hook is always in a lifting state; after the primary positioning is finished, in order to ensure that the guardrail main body and the positioning line are completely overlapped in parallel so as to ensure the linearity and smoothness of the anti-collision guardrail, a telescopic adjusting rod is adopted between the guardrail main body and the T-shaped beam for adjustment, support and fixation;
(3) hoisting the next section of guardrail on site and connecting the next section of guardrail with the previous section of guardrail; when the next section of guardrail is hoisted, foam rubber with the thickness of 0.5cm is coated on the contact surfaces of the two sections of guardrails to prevent the water leakage of the abutted seams of the guardrails, bolts 20 pre-embedded in hoisting holes at the tops of the guardrails are aligned to steel pipes 19 pre-embedded in the hoisting holes of the upper sections, the bolts are inserted into the steel pipes to be connected into a whole, and after the connection, the outer surfaces of the connection parts are subjected to pointing joint by mortar 18;
(4) after the hoisting of the first guardrail is finished, post-cast groove concrete pouring is carried out; the post-cast groove concrete has the same mark number as that of the bridge deck 8 pavement concrete, the post-cast groove pouring adopts a twice pouring method, the first post-cast groove concrete and the bridge deck pavement concrete are synchronously poured and enough allowance is reserved, and the second post-cast groove concrete is poured by adopting a grouting method on the top edge of the bridge deck to pour the remaining post-cast groove part of concrete and close the remaining post-cast groove opening after the bridge deck concrete pouring is finished;
(5) and (5) repeating the steps (2) to (4) to complete the installation of the subsequent prefabricated guardrails.
Example 2: a precast concrete welded type guard rail (see fig. 3) is different from embodiment 1 in that: adapting unit waters the connecting reinforcement 14 that extends in the inslot for following the inside steel reinforcement framework of guardrail main part backward, and connecting reinforcement has the oblique stay 13 that runs through the guardrail main part from the inboard slope of guardrail main part to the guardrail main part outside, waters the connecting reinforcement that stretches out in the inslot after one totally four, and four connecting reinforcement's the tip of stretching out is the straight line shape. Connecting piece in the flange board is for burying the U-shaped reinforcing bar 15 in the flange board, and the both ends of U-shaped reinforcing bar are stretched out flange board upper surface and are sharply restrainted, and relative connecting reinforcement and U-shaped reinforcing bar stretch out the section and water the straight line overlap joint and welded fastening in the groove after, adjust the straight line lapped length of reinforcing bar according to guardrail level and vertical linear needs. The rest of the structure is referred to example 1.
The embodiments described above are merely two preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A concrete precast welding type guardrail is characterized by comprising a precast guardrail main body, wherein the guardrail main body is provided with an angular part combined with flange plates on two sides of a plate girder, a reserved post-cast groove is arranged above the angular part, a steel reinforcement framework is arranged in the guardrail main body, and a connecting part which extends into the post-cast groove and is welded and fixed with a connecting piece pre-embedded in the flange plate is arranged at the position of the angular part of the guardrail main body; the connecting part is of an inverted T-shaped structure and comprises a vertical plate and a transverse plate which are vertically fixed with each other, the vertical plate is vertical to the length direction of the guardrail main body, the upper end part of the vertical plate is embedded into the guardrail main body, two sides of the embedded part of the vertical plate are connected with connecting ribs, and the connecting ribs are fixed with a steel bar framework in the guardrail main body; the connecting piece in the flange plate comprises a steel plate and an embedded rib fixed on the bottom surface of the steel plate, the embedded rib is embedded into the flange plate, the steel plate is partially positioned on the upper surface of the flange plate, and the embedded rib is U-shaped or L-shaped.
2. The precast concrete welded guardrail according to claim 1, wherein the connecting members are connecting bars extending from a reinforcement cage inside the guardrail body into the post-cast grooves, and the number of the connecting bars extending from one post-cast groove is four, and the extending ends of the four connecting bars are linear.
3. The precast concrete welded type guard rail according to claim 2, wherein the connectors in the flange plate are U-shaped reinforcing bars embedded in the flange plate, and both ends of the U-shaped reinforcing bars are protruded to the upper surface of the flange plate and fixed to the coupling reinforcing bars in the post-cast groove by lap welding.
4. The precast concrete welded type guardrail according to claim 1, 2 or 3, wherein the guardrail body is formed by inverted pouring, the guardrail body is provided with hanging holes at both end surface portions of the guardrail body, and one guardrail body is provided with four hanging holes at upper and lower portions of both side end surface portions of the guardrail body.
5. The precast concrete welded type guardrail according to claim 1, 2 or 3, wherein the precast guardrails are precast in segmented structures, when being installed, the opposite side edges of the adjacent guardrails are coated with foam rubber for water prevention, and the adjacent two segmented guardrails are connected through oppositely inserted steel pipes and bolts.
6. A method for installing and constructing a precast concrete welded type guard rail according to any one of claims 1 to 5, comprising the steps of: (1) constructing a pre-embedded connecting piece of a plate girder flange plate, and prefabricating a guardrail in a factory;
(2) hoisting a section of guardrail on site and sitting on the flange plate;
(3) hoisting the next section of guardrail on site and connecting the next section of guardrail with the previous section of guardrail;
(4) after the hoisting of the first guardrail is finished, post-cast groove concrete pouring is carried out;
(5) and (5) repeating the steps (2) to (4) to complete the installation of the subsequent prefabricated guardrails.
7. The installation and construction method of the precast concrete welded type guard rail according to claim 6, wherein the factory prefabrication of the guard rail includes: the method comprises the following steps of a installing a guardrail steel reinforcement framework, b installing an inner side template and an outer side template of a guardrail, c installing a lifting hole embedded part, d installing an end enclosure template, e checking and accepting, f pouring concrete in a layering mode, g detaching and repairing, h cleaning and maintaining.
8. The installation and construction method of the precast concrete welded guardrail according to claim 6, characterized in that before on-site hoisting, the elevation is measured at the resting point of the guardrail on the top surface of the beam slab, and the elevation is placed at the side line position of the precast guardrail and marked; when the guardrail is installed, the contact position of the guardrail and the upper surface of the flange plate is connected by adopting mortar, and the connecting part and the connecting piece are welded and fixed after the prefabricated guardrail is positioned; and the post-cast groove pouring adopts a twice pouring method, the first post-cast groove concrete and the bridge deck pavement concrete are synchronously poured and enough allowance is reserved, and the second post-cast groove concrete is poured after the bridge deck concrete is poured, the rest post-cast groove part of concrete is poured on the top edge of the bridge deck by adopting a grouting method and the rest post-cast groove opening is sealed.
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| CN201710546775.2A CN107489098B (en) | 2017-07-06 | 2017-07-06 | Concrete prefabricated welding type guardrail and installation construction method |
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| CN107489098B true CN107489098B (en) | 2020-04-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108677712A (en) * | 2018-06-27 | 2018-10-19 | 上海市政工程设计研究总院（集团）有限公司 | A kind of connecting structure and its construction method of Steel Bridge Deck concrete anti-collision guard bar |
| CN108867480B (en) * | 2018-07-16 | 2024-01-23 | 广州市市政工程设计研究总院有限公司 | Steel plate connection prefabricated FRP rib concrete side anti-collision guardrail |
| CN109162202A (en) * | 2018-10-30 | 2019-01-08 | 湖南大学 | A kind of light-duty assembled anticollision barrier component and installation method |
| CN110205929A (en) * | 2019-05-20 | 2019-09-06 | 浙江交工宏途交通建设有限公司 | A kind of precast concrete assembly guardrail and installation method |
| CN110453600B (en) * | 2019-07-26 | 2024-05-17 | 中交公路规划设计院有限公司 | Bridge guardrail prefabricated unit, bridge guardrail construction method and bridge |
| CN113737651A (en) * | 2021-07-30 | 2021-12-03 | 中铁十九局集团第五工程有限公司 | Assembled anti-collision guardrail and mounting method thereof |
| CN113502753A (en) * | 2021-08-13 | 2021-10-15 | 成都建工路桥建设有限公司 | Bridge assembly type prefabricated guardrail installation construction method |
| CN113832837A (en) * | 2021-09-29 | 2021-12-24 | 广州机施建设集团有限公司 | Fabricated anti-collision wall, welding device and construction method of fabricated anti-collision wall |
| CN115110402B (en) * | 2022-07-25 | 2024-05-14 | 东南大学 | Structure for rapid connection of prefabricated guardrail and bridge deck and rapid connection method |
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| JP3197235B2 (en) * | 1997-07-22 | 2001-08-13 | 川田建設株式会社 | Construction method of concrete structure using precast embedded formwork |
| JP5030838B2 (en) * | 2008-03-31 | 2012-09-19 | 株式会社Ｉｈｉインフラシステム | Construction method of bridge wall rails, residual formwork, and bridge wall rails |
| CN201411635Y (en) * | 2009-06-17 | 2010-02-24 | 广东省第二建筑工程公司 | Construction trolley of safety barrier template |
| CN101858057B (en) * | 2010-06-11 | 2011-08-10 | 天津二十冶建设有限公司 | Method for rapidly mounting reinforced concrete crash barrier steel form |
| CN205934713U (en) * | 2016-07-07 | 2017-02-08 | 上海公路桥梁（集团）有限公司 | Prefabricated pin -connected panel anticollision wall |
| CN106245526A (en) * | 2016-09-30 | 2016-12-21 | 中铁上海工程局集团有限公司 | The splicing structure of mining under railways protecting wall, straight wall and shield and construction method |
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