CN111827112B - Construction method of concrete railing upright post in middle of bridge road - Google Patents

Construction method of concrete railing upright post in middle of bridge road Download PDF

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Publication number
CN111827112B
CN111827112B CN202010934578.XA CN202010934578A CN111827112B CN 111827112 B CN111827112 B CN 111827112B CN 202010934578 A CN202010934578 A CN 202010934578A CN 111827112 B CN111827112 B CN 111827112B
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mold
concrete
template
column
panels
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CN111827112A (en
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杨浩
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Chongqing Changsai New Material Technology Co ltd
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Chongqing Changsai New Material Technology Co ltd
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Priority to CN202210024205.8A priority Critical patent/CN114232475B/en
Priority to CN202010934578.XA priority patent/CN111827112B/en
Publication of CN111827112A publication Critical patent/CN111827112A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/348—Moulds, cores, or mandrels of special material, e.g. destructible materials of plastic material or rubber
    • 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
    • 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

Abstract

The invention discloses a construction method of a concrete railing column in the middle of a bridge road, which comprises the following steps: 1) when the bridge pavement is constructed, a plurality of reinforcing steel bars are poured and fixed in advance on the upright post mounting positions on the upper surface of the bridge; 2) prefabricating a panel member and a baffle plate in a factory in advance, wherein the panel member comprises two panels which are oppositely and fixedly arranged at intervals along the front-back direction; 3) when the upright post is constructed on site, covering pre-poured reinforcing steel bars between the two panels, clamping the end parts of the baffle plates on the left side and the right side of the upright post between the two panels and enclosing a pouring space between the two panels; 4) and pouring concrete in the pouring space, forming a concrete inner core after the concrete is solidified, and fixing the two panels and the end parts of the barrier plates on the left side and the right side into a whole by means of the concrete inner core. The invention has the advantages of convenient prefabrication and transportation, improved convenience for site construction, improved construction quality and installed railing strength, etc.

Description

Construction method of concrete railing upright post in middle of bridge road
Technical Field
The invention relates to the technical field of bridge railings, in particular to a construction method of a concrete railing stand column in the middle of a bridge road.
Background
Usually, during bridge construction, sidewalks are arranged on two sides of a bridge, and bridge railings are arranged on the outer edges of the sidewalks to protect pedestrians from falling under the bridge. The bridge railing has usually wooden structure railing, metal structure railing and concrete structure railing. The concrete structure railing is firm in structure, convenient to construct, low in cost and the like, and is wide in application. The railing of concrete structure comprises a plurality of railing posts arranged at intervals and a railing panel connected between the railing posts, wherein the railing posts are basic members used as supports.
The existing bridge road concrete railing column structure generally comprises a column body and a column head at the upper end of the column body, the column body and the column head are of a prefabricated concrete structure, an installation hole is formed in the installation position of the upper surface of a bridge during construction, the lower end of the column body is installed in the installation hole to be fixed, a baffle installation groove is formed in the side face in the left direction and the right direction of the column body, and the end portions of the two ends of the baffle are inserted into the baffle installation groove and fixed.
The structure and the construction mode have the following defects: 1 concrete railing stand is solid construction, and weight is great, and the prefabrication and the transportation of being not convenient for, the site operation installation is also comparatively inconvenient. 2 the railing installation back, between railing stand and the bridge, the structural nature between stand and the sideboard is all relatively poor, and the installation firm degree and railing structural strength are lower, and the potential safety hazard is great.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a concrete railing post construction method in the middle of bridge road that can make things convenient for prefabrication and the transportation of component, improve the convenient degree of site operation, improve construction quality and installation railing intensity. In the scheme, the middle refers to the upright columns at the rest parts of two positions of the end of the non-railing.
In order to solve the technical problems, the invention adopts the following technical scheme:
a construction method of a concrete railing column in the middle of a bridge road is characterized by comprising the following steps:
1) when the bridge pavement is constructed, a plurality of vertically upward reinforcing steel bars for pouring into the upright posts are poured and fixed in advance on the upright post mounting positions on the outer side edges of roads on the two sides of the upper surface of the bridge;
2) prefabricating a panel member and a baffle plate in a factory in advance, wherein the panel member comprises two panels which are oppositely and fixedly arranged at intervals along the front-back direction, the outer side surfaces of the two panels are used for forming the front side surface and the rear side surface of the upright post, and the interval distance between the two panels is matched with the width of the baffle plate;
3) when the upright post is constructed on site, firstly, the panel component is erected on an upright post installation position, the precast reinforcing steel bars are covered at the middle position between the two panels, the end parts of the baffle plates on the left side and the right side of the upright post are clamped between the two panels, and a casting space is defined between the two panels;
4) and pouring concrete in the pouring space, forming a concrete inner core after the concrete is solidified, and fixing the two panels and the end parts of the barrier plates on the left side and the right side into a whole by means of the concrete inner core.
In this way, in the construction method, the panels on the front side and the rear side of the upright post are prefabricated into the panel members in a factory, so that the panel members are very convenient to produce and transport. Then, a concrete inner core is generated in a cast-in-place mode in a construction site to connect the panel and the side boards on the left side and the right side into a whole, and the stand columns can improve the connection strength with the bridge pavement by means of pre-poured reinforcing steel bars, so that the convenience degree of site construction is greatly improved, and the construction quality and the strength of installed railings are also improved.
Preferably, the outer surface of the panel is a decorative surface provided with patterns.
The stand appearance is more pleasing to the eye like this, and the panel obtains for the mill prefabrication simultaneously, is favorable to the shaping of decorative cover more.
As optimization, a reinforced connecting piece is further arranged between the two panels, two ends of the reinforced connecting piece are fixedly connected into the panels, and the middle of the reinforced connecting piece is embedded in the concrete inner core.
Therefore, the reinforced connecting piece can be conveniently prefabricated and connected between the two panels in a factory in advance, and the concrete inner core is poured in the field-reproducing construction, so that the bonding strength between the concrete inner core and the panels is better improved.
Furthermore, the reinforcing connecting piece comprises first reinforcing steel bars horizontally embedded in the two panels along the width direction of the panels and second reinforcing steel bars horizontally and fixedly connected between the two first reinforcing steel bars.
Thus, the reinforced connecting piece is simple in structure, beneficial to preparation and capable of providing better structural strength.
Furthermore, the second reinforcing bar is two and bilateral symmetry distributes the setting.
In this way, better structural strength may be provided.
Furthermore, a plurality of reinforcing connecting pieces are arranged between the two panels, and the reinforcing connecting pieces are arranged along the vertical direction at intervals. This can improve the connection strength even more.
Further, the panel is internally provided with a third reinforcing steel bar which is vertically arranged.
Thus, the strength of the panel can be improved.
Furthermore, two third steel bars are arranged in each panel and are arranged at the connecting positions of the first steel bars and the second steel bars.
Thus, the structural strength of the panel can be further improved.
Furthermore, a steel bar which is poured in advance on the upright post mounting position is a fourth steel bar; the fourth reinforcing steel bars are four and are distributed in the middle of the concrete inner core in a rectangular mode. The structural strength can be further improved.
As optimization, four corner positions of the pouring space are provided with plugging strips before pouring, and horizontal supporting rods are arranged between the front and rear opposite plugging strips.
Therefore, the supporting rod props up the blocking strips to block gaps at the edge positions of the front side and the rear side of the end part of the baffle plate, so that the concrete inner core is more convenient to pour and form, and the phenomenon that slurry leaks out of the stand column to influence the appearance during pouring is avoided.
Further, the supporting rod is a plurality of supporting rods which are arranged at intervals along the vertical direction. So as to better realize the support and ensure the sealing effect.
Further, the blocking strip is made of rubber materials or foam materials. The sealing ring has the characteristics of being beneficial to preparation, low in cost and capable of better improving the sealing effect.
Furthermore, chamfers are arranged at the corners of the front side and the rear side of the end part of the baffle plate, and the corresponding plugging strips are provided with extending edges which correspond to the chamfers and extend into the chamfers.
Therefore, the blocking plate can be conveniently assembled in site construction, and the blocking effect of the blocking strip is ensured.
Furthermore, the upper end of the column body is also provided with a column head, and the lower end of the column head is provided with a convex edge which protrudes outwards and covers the column body.
Therefore, the appearance aesthetic feeling of the upright post can be improved, and the effect of better protecting the post body can be achieved.
Furthermore, a downward connecting rib is arranged on the lower end face of the column head, the upper end of the connecting rib is prefabricated and fixedly connected inside the column head, and the lower end of the connecting rib is in a convolution shape and is embedded into the concrete inner core before the concrete inner core is solidified after being poured.
Thus, the reliability of the connection between the column head and the column body can be improved.
Preferably, the column head is a circular carving-shaped concrete column head. The decorative surfaces on the front side and the rear side of the column body are matched, so that the integral attractiveness of the stand column can be better improved.
Further, the circular carving-shaped concrete column head is prepared by adopting the following column head processing mold, the column head processing mold comprises a mold bottom plate, the upper surface of the mold bottom plate is used for forming the lower end face of the column head, an outer mold made of hard material is arranged above the mold bottom plate in a buckling mode, an inner mold made of flexible material is arranged inside the outer mold, a smooth contact surface is arranged between the inner mold and the outer mold in a sticking mode, and a column head cavity which is consistent with the outer surface of the column head in shape is formed inside the inner mold.
Therefore, when the mold is used, the inner mold is placed into the outer mold, the cavity of the column head of the inner mold faces upwards, concrete is poured into the inner mold for pouring, and the mold bottom plate can be buckled to facilitate the forming of the inner mold. And after the column head is formed, taking down the bottom template, taking out the inner mold and the column head from the outer mold, and tearing off the inner mold from the column head by utilizing the flexibility of the inner mold to obtain the circular carving-shaped concrete column head. The device has the advantages of simple structure, convenient and fast operation, high efficiency, good effect of protecting the appearance of the column head during demoulding, and the like. In order to ensure smooth forming and demolding of the circular carving shape, a production mold of the existing circular carving-shaped concrete column cap needs to be divided into multiple pieces in the circumferential direction, the multiple pieces of mold are assembled and fixed by bolts to form an inner cavity of the column cap, then pouring is carried out, and after pouring is finished, bolt fixing needs to be firstly removed, and then demolding can be carried out smoothly. Therefore, the processing mode has the defects of complex mold structure, inconvenient mold closing and demolding operation during pouring, low efficiency, easy damage to the appearance of a column cap and the like.
And optimally, the inner mold is made of PU soft foam materials.
Therefore, the inner mold is made of the polyurethane flexible foam material, and has the advantages of low cost, favorable preparation, excellent elasticity, adjustable flexibility and the like. Can more conveniently form and demould the column cap. In practice, the inner mold may be made of other flexible materials such as rubber.
Preferably, the outer mold is made of PU hard foam materials.
Therefore, the outer mold is made of polyurethane rigid foam material, and has the advantages of low cost, easy preparation, adjustable hardness, light weight and the like. The preparation of the external mold is convenient.
Further, the end face of the open end of the inner die is provided with a circle of inner die edge which extends outwards and vertically, and the edge of the inner die is pressed between the end face of the open end of the outer die and the die bottom plate.
Therefore, sealing during pouring can be realized better by depending on the edge of the inner mold, and the inner mold can be torn off by holding the edge of the inner mold during demolding conveniently and demolding conveniently.
Preferably, the outer side of the outer die is provided with a layer of outer template which is in a rectangular box shape and wraps the outer die in the outer template. Thus, the foaming preparation and forming of the outer die can be better facilitated.
Furthermore, the port of the outer template is provided with a buckling edge which extends outwards and vertically, and the buckling edge is buckled on the template bottom plate and fixedly connected by bolts.
Therefore, the outer template and the die bottom plate can be conveniently detachably connected.
Furthermore, the outer template is provided with a first opening, a first connecting pipe is inserted into the first opening, and the inner end of the first connecting pipe is located inside the outer die.
Therefore, the PU hard foam material can be conveniently poured into the outer template through the first connecting pipe for foaming so as to prepare the outer mold.
Furthermore, a second opening is formed in the outer template, a second connecting pipe is inserted in the second opening, and the inner end of the second connecting pipe is connected with the inner mold.
Therefore, the PU soft foam material is conveniently filled into the outer die through the second connecting pipe for foaming so as to prepare the inner die.
Furthermore, second openings are formed in the middle of the bottom end of the outer template and in the periphery of the outer template, the inner ends of second connecting pipes in the second openings in the middle of the bottom end of the outer template are connected to the bottom end of the inner mold, and the inner ends of second connecting pipes in the second openings in the periphery of the outer template are connected to the edge of the inner mold.
Like this, when conveniently preparing the centre form, pour into the soft bubble material of PU through the second connecting pipe at middle part, rely on the second connecting pipe return air of position all around for the soft bubble material of PU who pours into can fill up whole centre form space well. During implementation, the first connecting pipe and the second connecting pipe are preferably made of PVC pipes, so that the cost is low and the implementation is facilitated.
Further, the column head model is further included, and the column head model is consistent with the column head to be processed in shape.
Thus, the preparation of the inner mold and the outer mold can be more convenient.
Furthermore, a plug hole is arranged in the middle of the die base plate in a penetrating mode.
Like this, the spliced eye on the bottom plate of the mould can conveniently pour the vibration as the vibrating rod inserted hole when pouring, improves and pours the quality, and the back of vibrating finishing can insert a splice bar through the trompil and get into and fix to the column cap bottom. So that the produced column cap can be conveniently connected with the column body during construction.
Further, the column cap processing mold is prepared by adopting the following preparation method: firstly, preparing a column head model according to the appearance of a circular-carving-shaped concrete railing column head product, then preparing a flat-plate-shaped mold bottom plate with the area larger than the area of the bottom surface of the column head product, and then preparing an outer template with a rectangular box structure, wherein a first opening and a second opening are correspondingly formed in the outer template, and the port of the outer template is provided with a buckling edge which extends vertically outwards and can be fixed on the mold bottom plate by virtue of a bolt; 2, the mould base plate is laid flat, the column cap model is fixed at a corresponding position in the middle of the mould base plate (the column cap model can be positioned by matching an outer convex structure at the lower end with a plug hole in the middle of the mould base plate), a layer of mud material (such as sculpture mud, soil or gypsum and the like, and the coating thickness is the required thickness of an inner film) is coated on the outer surface of the column body model, the outer surface of the mud material is coated to be round and round, and a circle of edge extends out from the joint of the mud material and the mould base plate in the circumferential direction; 3 after the mud material is hardened, buckling the outer template on the outer side of the column cap model and fixing the outer template on the template by bolts; inserting the prefabricated first connecting pipe into the first opening and fixing the prefabricated first connecting pipe on the outer formwork, inserting the prefabricated second connecting pipe into the corresponding second opening and enabling the inner end of the prefabricated second connecting pipe to be in contact with the mud-shaped material; 4, filling the prepared PU hard foam foaming material for forming the outer mold into the outer mold plate through a first connecting pipe, and forming the outer mold after the PU hard foam foaming material is hardened; 5, taking down the outer template by disassembling the bolts, taking the column cap model out of the outer mold, fixing the column cap model at the corresponding position in the middle of the mold bottom plate again after removing the mud-like materials, and then fastening and fixing the outer template and the outer mold in the outer template on the mold bottom plate again; 6, pouring the prepared PU soft foam foaming material for forming the inner mold from the second connecting pipe at the middle position, and stopping after the PU soft foam foaming material enters the second connecting pipes at the peripheral positions; and forming an inner mold after the PU soft foam foaming material is solidified, detaching the outer template and the outer mold from the mold bottom plate, and respectively detaching the column head model and the inner mold to obtain the integral mold.
Therefore, the die preparation method has the advantages of simplicity, convenience and quickness in preparation, and the prepared inner die has the part extending into the second connecting pipe and can be used for positioning during inner die assembly, so that the assembly precision and efficiency are improved.
When the column cap processing mold is used for pouring the column cap, the column cap processing mold comprises the following steps: a, inverting the outer template and the outer mold to enable the opening ends of the outer template and the outer mold to be upward, and putting the inner mold into the outer mold and fixing the inner mold into the outer mold; b, pouring concrete into the inner cavity of the inner die, covering and fixing the die bottom plate, and inserting the vibrating rod into the inserting hole in the middle of the die bottom plate to finish vibrating the concrete; c, taking out the vibrating rod after vibrating, and inserting and fixing the upper end of the connecting rib into the concrete from the inserting hole in the middle of the die bottom plate; d, demolding after the concrete is hardened to obtain a column cap product, during demolding, firstly disassembling the bolts at the periphery of the outer template, taking the outer template and the outer template together from the template base plate, and then tearing the inner template from the column cap product to obtain the column cap product. Therefore, the operation is very convenient, fast, simple and efficient, and the column head shape precision can be better protected.
In conclusion, the invention has the advantages of convenient prefabrication and transportation, improved convenience for site construction, improved construction quality and installed railing strength, etc.
Drawings
Fig. 1 is a front view of a column made according to the present invention.
Fig. 2 is a top view of the column portion of fig. 1 in horizontal section.
Fig. 3 is a schematic view of two panels of fig. 1, which are prefabricated separately.
Fig. 4 is a schematic structural view of an individual column head.
Fig. 5 is a schematic structural view of a mold for the stud head.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
In the specific implementation: a construction method of a concrete railing column in the middle of a bridge road is characterized by comprising the following steps:
1) when the bridge pavement is constructed, a plurality of vertically upward reinforcing steel bars for pouring into the upright posts are poured and fixed in advance on the upright post mounting positions on the outer side edges of roads on the two sides of the upper surface of the bridge;
2) prefabricating a panel member and a baffle plate in a factory in advance, wherein the panel member comprises two panels which are oppositely and fixedly arranged at intervals along the front-back direction, the outer side surfaces of the two panels are used for forming the front side surface and the rear side surface of the upright post, and the interval distance between the two panels is matched with the width of the baffle plate;
3) when the upright post is constructed on site, firstly, the panel component is erected on an upright post installation position, the precast reinforcing steel bars are covered at the middle position between the two panels, the end parts of the baffle plates on the left side and the right side of the upright post are clamped between the two panels, and a casting space is defined between the two panels;
4) and pouring concrete in the pouring space, forming a concrete inner core after the concrete is solidified, and fixing the two panels and the end parts of the barrier plates on the left side and the right side into a whole by means of the concrete inner core.
In this way, in the construction method, the panels on the front side and the rear side of the upright post are prefabricated into the panel members in a factory, so that the panel members are very convenient to produce and transport. Then, a concrete inner core is generated in a cast-in-place mode in a construction site to connect the panel and the side boards on the left side and the right side into a whole, and the stand columns can improve the connection strength with the bridge pavement by means of pre-poured reinforcing steel bars, so that the convenience degree of site construction is greatly improved, and the construction quality and the strength of installed railings are also improved.
Specifically, the railing post constructed by the construction method has a structure shown in fig. 1-4, and comprises a post body 1, wherein the lower end of the post body 1 is fixed at a post installation position on the outer edges of roads on two sides of the upper surface of a bridge, blocking plates 2 are fixedly arranged on the left side and the right side of the post body, the post body comprises two face plates 3 which are fixedly arranged at intervals along the front-back direction, the end parts of the blocking plates 2 on the left side and the right side of the post body are clamped between the two face plates 3, a pouring space is defined between the two face plates, a concrete inner core 4 is poured in the pouring space, and the two face plates 3 and the end parts of the blocking plates on the left side and the right side are fixed into a whole by virtue of the concrete inner core 4.
Wherein, the outer surface of the panel 3 is a decorative surface provided with patterns.
The stand appearance is more pleasing to the eye like this, and the panel obtains for the mill prefabrication simultaneously, is favorable to the shaping of decorative cover more.
Wherein, still be provided with the reinforcement connecting piece between two panels 3, inside the reinforcement connecting piece both ends rigid coupling income panel, the reinforcement connecting piece middle part is buried underground in the concrete inner core.
Therefore, the reinforced connecting piece can be conveniently prefabricated and connected between the two panels in a factory in advance, and the concrete inner core is poured in the field-reproducing construction, so that the bonding strength between the concrete inner core and the panels is better improved.
The reinforcing connecting piece comprises first reinforcing steel bars 5 embedded in the two panels horizontally along the width direction of the panels and second reinforcing steel bars 6 fixedly connected between the two first reinforcing steel bars 5 horizontally.
Thus, the reinforced connecting piece is simple in structure, beneficial to preparation and capable of providing better structural strength.
Wherein, the second reinforcing bar 6 is two and bilateral symmetry distributes the setting.
In this way, better structural strength may be provided.
Wherein, be provided with a plurality of reinforcement connectors between two panels 3, each reinforcement connector sets up along vertical interval distribution. This can improve the connection strength even more.
Wherein, the panel is internally provided with a third steel bar 7 which is vertically arranged.
Thus, the strength of the panel can be improved.
Wherein, be provided with two third reinforcing bars 7 in every panel and arrange in first reinforcing bar and second reinforcing bar connection position.
Thus, the structural strength of the panel can be further improved.
Wherein, the steel bar which is poured in advance on the column mounting position is a fourth steel bar 8; the fourth reinforcing steel bars 8 are four and are distributed in the middle of the concrete inner core in a rectangular shape. The structural strength can be further improved.
Wherein, four corner positions in the space of pouring still are provided with plugging strip 9 before pouring, still are provided with horizontal bracing piece 10 between the relative plugging strip 9 in front and back.
Therefore, the supporting rod props up the blocking strips to block gaps at the edge positions of the front side and the rear side of the end part of the baffle plate, so that the concrete inner core is more convenient to pour and form, and the phenomenon that slurry leaks out of the stand column to influence the appearance during pouring is avoided.
Wherein, the bracing piece is a plurality ofly along vertical interval arrangement. So as to better realize the support and ensure the sealing effect.
Wherein, the plugging strip 9 is made of rubber material or foam material. The sealing ring has the characteristics of being beneficial to preparation, low in cost and capable of better improving the sealing effect.
Wherein, both sides corner department is provided with the chamfer around the sideboard 2 tip, and the shutoff strip that corresponds is provided with and corresponds with the chamfer and extends into the extension limit in the chamfer clearance.
Therefore, the blocking plate can be conveniently assembled in site construction, and the blocking effect of the blocking strip is ensured.
Wherein, the upper end of the column body is also provided with a column head 11, and the lower end of the column head 11 is provided with a convex edge which is protruded outwards and covers the column body.
Therefore, the appearance aesthetic feeling of the upright post can be improved, and the effect of better protecting the post body can be achieved.
The lower end face of the column head 11 is provided with a downward connecting rib 12 (not shown in the figure), the upper end of the connecting rib is prefabricated and fixedly connected inside the column head, and the lower end of the connecting rib is in a convolution shape and is embedded into the concrete inner core before the concrete inner core is solidified after being poured.
Thus, the reliability of the connection between the column head and the column body can be improved.
In this embodiment, the column head 11 is a concrete column head in a circular carving shape. The decorative surfaces on the front side and the rear side of the column body are matched, so that the integral attractiveness of the stand column can be better improved.
The circular carving-shaped concrete column head is prepared by adopting the following column head processing mold, referring to fig. 5, the column head processing mold comprises a mold bottom plate 21, the upper surface of the mold bottom plate is used for forming the lower end face of the column head, wherein an outer mold 22 made of hard material is arranged above the mold bottom plate 21 in a buckling mode, an inner mold 23 made of flexible material is arranged inside the outer mold 22, a smooth contact surface is arranged between the inner mold 23 and the outer mold 22 in a pasting mode, and a column head cavity which is consistent with the outer surface of the column head in shape is formed inside the inner mold 23.
Therefore, when the mold is used, the inner mold is placed into the outer mold, the cavity of the column head of the inner mold faces upwards, concrete is poured into the inner mold for pouring, and the mold base plate can be buckled to facilitate the forming of the inner mold. And after the column head is formed, taking down the bottom template, taking out the inner mold and the column head from the outer mold, and tearing off the inner mold from the column head by utilizing the flexibility of the inner mold to obtain the circular carving-shaped concrete column head. The device has the advantages of simple structure, convenient and fast operation, high efficiency, good effect of protecting the appearance of the column head during demoulding, and the like. In order to ensure smooth forming and demolding of the circular carving shape, a production mold of the existing circular carving-shaped concrete column cap needs to be divided into multiple pieces in the circumferential direction, the multiple pieces of mold are assembled and fixed by bolts to form an inner cavity of the column cap, then pouring is carried out, and after pouring is finished, bolt fixing needs to be firstly removed, and then demolding can be carried out smoothly. Therefore, the processing mode has the defects of complex mold structure, inconvenient mold closing and demolding operation during pouring, low efficiency, easy damage to the appearance of a column cap and the like.
In the mold, the inner mold 23 is made of a PU soft foam material.
Therefore, the inner mold is made of the polyurethane flexible foam material, and has the advantages of low cost, favorable preparation, excellent elasticity, adjustable flexibility and the like. Can more conveniently form and demould the column cap. In practice, the inner mold may be made of other flexible materials such as rubber.
In the mold, the outer mold 22 is made of PU rigid foam material.
Therefore, the outer mold is made of polyurethane rigid foam material, and has the advantages of low cost, easy preparation, adjustable hardness, light weight and the like. The preparation of the external mold is convenient.
In the mold, the end face of the open end of the inner mold 23 has a ring of inner mold edge 24 extending perpendicularly outward, and the inner mold edge 24 is pressed between the end face of the open end of the outer mold and the mold bottom plate.
Therefore, sealing during pouring can be realized better by depending on the edge of the inner mold, and the inner mold can be torn off by holding the edge of the inner mold during demolding conveniently and demolding conveniently.
In the die, a layer of outer template 25 is arranged on the outer side of the outer die, and the outer template 25 is rectangular box-shaped and wraps the outer die in the outer template. Thus, the foaming preparation and forming of the outer die can be better facilitated.
In the mold, the end opening of the outer mold plate 25 is provided with a fastening edge which extends vertically outwards and is fastened on the mold bottom plate and fixedly connected by bolts 26.
Therefore, the outer template and the die bottom plate can be conveniently detachably connected.
In the die, an outer die plate 25 is provided with a first opening, a first connecting pipe 27 is inserted into the first opening, and the inner end of the first connecting pipe 27 is positioned in the outer die.
Therefore, the PU hard foam material can be conveniently poured into the outer template through the first connecting pipe for foaming so as to prepare the outer mold.
In the mould, the outer template is also provided with a second opening, a second connecting pipe 28 is inserted in the second opening, and the inner end of the second connecting pipe 28 is connected with the inner mould 23.
Therefore, the PU soft foam material is conveniently filled into the outer die through the second connecting pipe for foaming so as to prepare the inner die.
In the die, the middle part and the periphery of the bottom end of the outer die plate are provided with second openings, the inner ends of second connecting pipes in the second openings in the middle part of the bottom end of the outer die plate are connected to the bottom end of the inner die, and the inner ends of the second connecting pipes in the second openings in the periphery of the outer die plate are connected to the edge 24 of the inner die.
Like this, when conveniently preparing the centre form, pour into the soft bubble material of PU through the second connecting pipe at middle part, rely on the second connecting pipe return air of position all around for the soft bubble material of PU who pours into can fill up whole centre form space well. During implementation, the second connecting pipes at the periphery are positioned at four corner positions of the flexible film cavity. Like this, make its specially adapted corner position have the figurative circular carving shape concrete railing stand column cap processing of indent and use, can utilize the return-air effect of the second connecting pipe of position all around for can guide the PU soft bubble material of pouring into better during preparation centre form and flow toward die cavity corner position, make the centre form obtain powerful filling at corner weak position, improve the intensity quality of centre form at the corner position, and then guarantee the centre form better and take shape the back, rely on the corner quality of the product that the centre form made. During implementation, the first connecting pipe and the second connecting pipe are preferably made of PVC pipes, so that the cost is low and the implementation is facilitated.
The die further comprises a column head model 29, and the column head model 29 is consistent with the column head to be processed in shape.
Thus, the preparation of the inner mold and the outer mold can be more convenient.
In the die, a plug hole is arranged in the middle of a die bottom plate 21 in a penetrating mode.
Like this, the spliced eye on the bottom plate of the mould can conveniently pour the vibration as the vibrating rod inserted hole when pouring, improves and pours the quality, and the back of vibrating finishing can insert a splice bar through the trompil and get into and fix to the column cap bottom. So that the produced column cap can be conveniently connected with the column body during construction.
The mold is prepared by the following preparation method: 1, firstly, preparing a column head model according to the appearance of a circular-carving-shaped concrete railing column head product, then preparing a flat-plate-shaped mold bottom plate with the area larger than the area of the bottom surface of the column head product, and then preparing an outer template with a rectangular box structure, wherein a first opening and a second opening are correspondingly formed in the outer template, and the port of the outer template is provided with a buckling edge which extends vertically outwards and can be fixed on the mold bottom plate by virtue of bolts; 2, the mould base plate is laid flat, the column cap model is fixed at a corresponding position in the middle of the mould base plate (the column cap model can be positioned by matching an outer convex structure at the lower end with a plug hole in the middle of the mould base plate), a layer of mud material (such as sculpture mud, soil or gypsum and the like, and the coating thickness is the required thickness of an inner film) is coated on the outer surface of the column body model, the outer surface of the mud material is coated to be round and round, and a circle of edge extends out from the joint of the mud material and the mould base plate in the circumferential direction; 3 after the mud material is hardened, buckling the outer template on the outer side of the column cap model and fixing the outer template on the template by bolts; inserting the prefabricated first connecting pipe into the first opening and fixing the prefabricated first connecting pipe on the outer formwork, inserting the prefabricated second connecting pipe into the corresponding second opening and enabling the inner end of the prefabricated second connecting pipe to be in contact with the mud-shaped material; 4, filling the prepared PU hard foam foaming material for forming the outer mold into the outer mold plate through a first connecting pipe, and forming the outer mold after the PU hard foam foaming material is hardened; 5, taking down the outer template by disassembling the bolts, taking the column cap model out of the outer mold, fixing the column cap model at the corresponding position in the middle of the mold bottom plate again after removing the mud-like materials, and then fastening and fixing the outer template and the outer mold in the outer template on the mold bottom plate again; 6, pouring the prepared PU soft foam foaming material for forming the inner mold from the second connecting pipe at the middle position, and stopping after the PU soft foam foaming material enters the second connecting pipes at the peripheral positions; and forming an inner mold after the PU soft foam foaming material is solidified, detaching the outer template and the outer mold from the mold bottom plate, and respectively detaching the column head model and the inner mold to obtain the integral mold.
Therefore, the method has the advantages of simplicity, convenience and quickness in preparation, and the prepared inner die has the part extending into the second connecting pipe, so that the inner die can be used for positioning during inner die assembly, and the assembly precision and efficiency are improved.
When the column cap processing mold is used for pouring a column cap, the column cap processing mold comprises the following steps that a, an outer template and an outer mold are inverted to enable the opening end of the outer template to be upward, and an inner mold is arranged and fixed in the outer mold; b, pouring concrete into the inner cavity of the inner die, covering and fixing the die bottom plate, and inserting the vibrating rod into the inserting hole in the middle of the die bottom plate to finish vibrating the concrete; c, taking out the vibrating rod after vibrating, and inserting and fixing the upper end of the connecting rib into the concrete from the inserting hole in the middle of the die bottom plate; d, demolding after the concrete is hardened to obtain a column cap product, during demolding, firstly disassembling the bolts at the periphery of the outer template, taking the outer template and the outer template together from the template base plate, and then tearing the inner template from the column cap product to obtain the column cap product.

Claims (10)

1. A construction method of a concrete railing column in the middle of a bridge road is characterized by comprising the following steps:
1) when the bridge pavement is constructed, a plurality of vertically upward reinforcing steel bars for pouring into the upright posts are poured and fixed in advance on the upright post mounting positions on the outer side edges of roads on the two sides of the upper surface of the bridge;
2) prefabricating a panel member and a baffle plate in a factory in advance, wherein the panel member comprises two panels which are oppositely and fixedly arranged at intervals along the front-back direction, the outer side surfaces of the two panels are used for forming the front side surface and the rear side surface of the upright post, and the interval distance between the two panels is matched with the width of the baffle plate; a reinforced connecting piece is also arranged between the two panels, two ends of the reinforced connecting piece are fixedly connected into the panels, and the middle part of the reinforced connecting piece is embedded in the concrete inner core; the reinforcing connecting piece comprises first reinforcing steel bars horizontally embedded in the two panels along the width direction of the panels and also comprises second reinforcing steel bars horizontally and fixedly connected between the two first reinforcing steel bars;
3) when the upright post is constructed on site, firstly, the panel component is erected on an upright post installation position, the precast reinforcing steel bars are covered at the middle position between the two panels, the end parts of the baffle plates on the left side and the right side of the upright post are clamped between the two panels, and a casting space is defined between the two panels; sealing strips are arranged at four corners of the pouring space before pouring, and horizontal support rods are arranged between the front sealing strip and the rear sealing strip; chamfers are arranged at the corners of the front side and the rear side of the end part of the baffle plate, and the corresponding plugging strip is provided with an extending edge which corresponds to the chamfers and extends into the chamfer gap;
4) and pouring concrete in the pouring space, forming a concrete inner core after the concrete is solidified, and fixing the two panels and the end parts of the barrier plates on the left side and the right side into a whole by means of the concrete inner core.
2. The method for constructing the concrete railing post in the middle of a bridge road as claimed in claim 1, wherein the outer surface of the panel is a decorative surface with patterns.
3. The construction method of the bridge road middle concrete railing post according to claim 1, characterized in that the second steel bars are two and are distributed symmetrically;
a plurality of reinforcing connecting pieces are arranged between the two panels, and the reinforcing connecting pieces are arranged along the vertical direction at intervals.
4. The construction method of the bridge road middle concrete railing post according to claim 3, characterized in that a third steel bar is vertically arranged in the panel;
two third reinforcing bars are arranged in each panel and are arranged at the connecting positions of the first reinforcing bars and the second reinforcing bars.
5. The construction method of the middle concrete railing post of the bridge road according to claim 3, wherein the steel bars pre-cast on the post mounting positions are fourth steel bars; the fourth reinforcing steel bars are four and are distributed in the middle of the concrete inner core in a rectangular mode.
6. The construction method of the bridge road middle concrete railing post according to claim 1, characterized in that the supporting rods are arranged vertically at intervals; the plugging strip is made of rubber material or foam material.
7. The method for constructing the concrete railing post in the middle of the bridge road as claimed in claim 1, wherein the upper end of the post body is further provided with a post head, the lower end of the post head is provided with a convex edge which protrudes outwards and covers the post body;
the lower end face of the column cap is provided with a downward connecting rib, the upper end of the connecting rib is prefabricated and fixedly connected inside the column cap, and the lower end of the connecting rib is in a convolution shape and is embedded into the concrete inner core before solidification after the concrete inner core is poured.
8. The method for constructing the concrete railing post in the middle of the bridge and road according to claim 7, wherein the post head is a circular carved concrete post head;
the circular carving-shaped concrete column head is prepared by adopting the following column head processing mold, the column head processing mold comprises a mold bottom plate, the upper surface of the mold bottom plate is used for forming the lower end face of the column head, wherein an outer mold made of hard material is arranged above the mold bottom plate in a buckling manner, an inner mold made of flexible material is arranged inside the outer mold, a smooth contact surface is arranged between the inner mold and the outer mold in a sticking manner, and a column head cavity with the same shape as the outer surface of the column head is formed inside the inner mold;
the inner mold is made of PU soft foam material;
the outer mold is made of PU hard foam material;
the end surface of the open end of the inner mold is provided with a circle of inner mold edge which extends outwards and vertically, and the edge of the inner mold is pressed between the end surface of the open end of the outer mold and the mold bottom plate;
the outer side of the outer die is provided with an outer template which is in a rectangular box shape and wraps the outer die;
the end opening of the outer template is provided with a fastening edge which extends vertically outwards and is fastened on the template bottom plate and fixedly connected by bolts;
the outer template is provided with a first opening, a first connecting pipe is inserted into the first opening, and the inner end of the first connecting pipe is positioned in the outer mold;
the outer template is also provided with a second opening, a second connecting pipe is inserted in the second opening, and the inner end of the second connecting pipe is connected with the inner mold;
second openings are formed in the middle and the periphery of the bottom end of the outer template, the inner ends of second connecting pipes in the second openings in the middle of the bottom end of the outer template are connected to the bottom end of the inner template, and the inner ends of the second connecting pipes in the second openings in the periphery of the outer template are connected to the edge of the inner template;
the column head model is consistent with the column head to be processed in shape;
the middle part of the die bottom plate is provided with a plug hole in a penetrating way.
9. The bridge road middle concrete railing post construction method according to claim 8, characterized in that the post head processing mold is prepared by the following preparation method: firstly, preparing a column head model according to the appearance of a circular-carving-shaped concrete railing column head product, then preparing a flat-plate-shaped mold bottom plate with the area larger than the area of the bottom surface of the column head product, and then preparing an outer template with a rectangular box structure, wherein a first opening and a second opening are correspondingly formed in the outer template, and the port of the outer template is provided with a buckling edge which extends vertically outwards and can be fixed on the mold bottom plate by virtue of a bolt; 2, flatly placing the mold base plate, fixing the column cap model at a corresponding position in the middle of the mold base plate, coating a layer of mud-like material on the outer surface of the column body model, coating the mud-like material to be round and extending a circle of edge to the circumferential direction at the joint of the mud-like material and the mold base plate; 3 after the mud material is hardened, buckling the outer template on the outer side of the column cap model and fixing the outer template on the template by bolts; inserting the prefabricated first connecting pipe into the first opening and fixing the prefabricated first connecting pipe on the outer formwork, inserting the prefabricated second connecting pipe into the corresponding second opening and enabling the inner end of the prefabricated second connecting pipe to be in contact with the mud-shaped material; 4, filling the prepared PU hard foam foaming material for forming the outer mold into the outer mold plate through a first connecting pipe, and forming the outer mold after the PU hard foam foaming material is hardened; 5, taking down the outer template by disassembling the bolts, taking the column cap model out of the outer mold, fixing the column cap model at the corresponding position in the middle of the mold bottom plate again after removing the mud-like materials, and then fastening and fixing the outer template and the outer mold in the outer template on the mold bottom plate again; 6, pouring the prepared PU soft foam foaming material for forming the inner mold from the second connecting pipe at the middle position, and stopping after the PU soft foam foaming material enters the second connecting pipes at the peripheral positions; and forming an inner mold after the PU soft foam foaming material is solidified, detaching the outer template and the outer mold from the mold bottom plate, and respectively detaching the column head model and the inner mold to obtain the integral mold.
10. The construction method of the bridge road middle concrete railing post column according to claim 8, wherein when the post head processing mold is used for pouring the post head, the method comprises the following steps: a, inverting the outer template and the outer mold to enable the opening ends of the outer template and the outer mold to be upward, and putting the inner mold into the outer mold and fixing the inner mold into the outer mold; b, pouring concrete into the inner cavity of the inner die, covering and fixing the die bottom plate, and inserting the vibrating rod into the inserting hole in the middle of the die bottom plate to finish vibrating the concrete; c, taking out the vibrating rod after vibrating, and inserting and fixing the upper end of the connecting rib into the concrete from the inserting hole in the middle of the die bottom plate; d, demolding after the concrete is hardened to obtain a column cap product, during demolding, firstly disassembling the bolts at the periphery of the outer template, taking the outer template and the outer template together from the template base plate, and then tearing the inner template from the column cap product to obtain the column cap product.
CN202010934578.XA 2020-09-08 2020-09-08 Construction method of concrete railing upright post in middle of bridge road Active CN111827112B (en)

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