Split type pouring method for bridge guard plate stand column

Abstract

The invention discloses a split type pouring method for a bridge protection plate stand column. A cross beam stand column mold and a protection plate mold which are of a split structure are adopted for two times of pouring; the beam and column mold comprises a base, a beam and column bottom mold, a column side mold, a column end mold, a beam side mold and a beam end mold. The cross beam and stand column bottom die is fixed on the base, the stand column side die, the cross beam side die and the cross beam and stand column bottom die form a pouring groove, the stand column end die and the cross beam end die are arranged at the ends of the stand column and the cross beam respectively, and all templates are connected into a whole through bolts; the guard plate die comprises a base, a guard plate bottom die and a guard plate side die; the protective plate side molds are hinged to the protective plate bottom mold in a turnover manner through rotating shafts to form an opening and closing mold; the guard plate side dies are closed to form a guard plate pouring groove; positioning clamps are arranged on the upper edges of the guard plate side dies. When the method is used for producing the guard plate stand column, the cross beam stand column is firstly poured, then the cross beam stand column is placed on the guard plate mold for guard plate pouring, the quality of the exposed face of the guard plate stand column can be improved, and the size precision is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering construction, and particularly relates to a split casting method for bridge guardrail columns. Background Art

[0002] Bridge guardrail columns mainly consist of crossbeams, columns and guardrail structures. Currently, bridge guardrail columns are usually designed as an integral structure, including horizontal and vertical concrete casting molds. Due to the differences in the appearance dimensions of the columns, crossbeams and guardrails of bridge guardrail columns, on the construction site, because the materials of the guardrails, crossbeams and columns are inconsistent, the vertical mold cannot cast materials separately; while the conventional horizontal mold requires pouring the guardrail first, and then pouring the columns and crossbeams after the guardrail reaches a certain strength. Finally, the front sides of the columns and crossbeams still need to be manually watered and plastered; therefore, the bridge guardrail columns cast by the existing molds and their construction methods have problems such as poor appearance quality, large dimensional deviation and low construction efficiency. Summary of the Invention

[0003] The present invention discloses a split casting method for bridge guardrail columns according to the deficiencies of the prior art. The purpose of the present invention is to solve the technical problems of poor appearance quality, large dimensional deviation and low construction efficiency of the front sides of columns and crossbeams during the production of existing bridge guardrail columns.

[0004] The present invention is achieved through the following technical solutions:

[0005] A split casting method for bridge guardrail columns, characterized in that: a split-structured crossbeam-column mold and a guardrail mold are used for two castings; wherein:

[0006] The crossbeam-column mold includes a base, a crossbeam-column bottom mold, column side molds, column end molds, crossbeam side molds, and crossbeam end molds; the crossbeam-column bottom mold is fixed on the base, and the column side molds and crossbeam side molds are installed on the crossbeam-column bottom mold to form a crossbeam-column casting groove. Column end molds and crossbeam end molds are respectively arranged at the column ends and crossbeam ends, and the templates are connected by bolts to form an integral body;

[0007] The guardrail mold includes a base, a guardrail bottom mold, and guardrail side molds; the guardrail bottom mold is fixed on the base, and multiple groups of guardrail side molds are hinged to the guardrail bottom mold through rotating shafts to form an openable and closable mold; when the guardrail side molds are closed, they are connected and fixed by bolts to form a guardrail casting groove; a positioning card for positioning the crossbeam-column casting is arranged along the upper edge of the guardrail side mold;

[0008] The casting method includes: first pouring crossbeam-column concrete, demolding when the crossbeam-column reaches the demolding strength, rotating the crossbeam-column 180° after demolding and placing it on the guardrail mold, and then pouring guardrail concrete.

[0009] Specifically, it includes the following steps:

[0010] S1, Concrete pouring for crossbeam and column:

[0011] S11. Clean all formworks, embedded parts, etc. After pushing the side formworks of the crossbeam and column to the formwork closing position, tighten all bolts on the side formworks of the crossbeam and column, and install the end formworks of the crossbeam and column in place;

[0012] S12. Spray release agent and install the steel reinforcement cage and embedded parts;

[0013] S13. Carry out concrete pouring and curing;

[0014] S14. When the concrete meets the demoulding requirements, carry out demoulding and demoulding of the crossbeam and column. When demoulding, install a lifting tool in the sleeve as the lifting point;

[0015] S15. Flip the guard plate column integrally by 180°;

[0016] S2, Concrete pouring for guard plate:

[0017] S21. Clean all formworks. After rotating the side formwork of the guard plate in sequence around the rotating shaft to the in-place position, tighten all bolts on the side formwork of the guard plate and spray release agent;

[0018] S22. Roughcast the contact surface between the crossbeam and column that has been poured and consolidated and the guard plate, and connect the guard plate steel bars with the crossbeam and column steel bars;

[0019] S23. Lift the crossbeam and column onto the guard plate mold, and use the limit card and bolts installed in the sleeve of the crossbeam and column to accurately position the crossbeam and column, and carry out concrete pouring and curing of the guard plate;

[0020] Or, first carry out concrete pouring of the guard plate on the guard plate mold, and then immediately lift the crossbeam and column onto the guard plate mold for accurate positioning, and carry out concrete pouring and curing of the guard plate;

[0021] S24. When the concrete meets the demoulding requirements, carry out demoulding and demoulding.

[0022] Furthermore, the bases of the crossbeam and column mold and the guard plate mold both include multiple support beams fixedly arranged on the ground.

[0023] Furthermore, the side formworks of the crossbeam, the side formworks of the column are fixedly connected by bolts with the bottom formwork of the crossbeam and column. The bottom formwork of the crossbeam and column is provided with a limit groove with a long hole structure for connecting with the side formwork of the crossbeam. The bolt passes through the connection hole provided on the side formwork of the crossbeam and is adjustably connected and fixed with the limit groove of the long hole structure within the limit groove; the bottom formwork of the crossbeam and column is also provided with a limit groove with a dovetail groove structure for connecting with the side formwork of the column. The bolt passes through the connection hole provided on the side formwork of the column and is adjustably connected and fixed with the limit groove of the dovetail groove structure within the limit groove.

[0024] Furthermore, a nut limit card is provided at the end of the limit groove on the back of the bottom mold of the crossbeam column. The nut limit card has a limit chute arranged in the same direction as the limit groove, and the opening end gradually expands to form a dovetail groove structure.

[0025] Furthermore, the side mold of the crossbeam includes an integral side mold of the crossbeam column mold at the bottom end and a segmented side mold of the crossbeam on the column side. The segmented side mold of the crossbeam and the side mold of the column are of an integral fixed structure. The connection part of the two segmented side molds of the crossbeam is arranged in the middle and is set as an inclined interface structure.

[0026] Furthermore, bolt hole embedded part installation holes and grouting hole embedded part installation holes are provided on the side mold of the crossbeam; sleeve installation holes are provided on the end mold of the column and the end mold of the crossbeam.

[0027] Furthermore, a clamping groove structure is provided on the positioning card. The limit card includes two positioning cards for positioning the end of the crossbeam during pouring consolidation and two positioning cards for positioning the end of the column during pouring consolidation.

[0028] Furthermore, support rib plates are provided on the outer sides of the templates of the side mold of the crossbeam, the side mold of the column, and the side mold of the guard plate;

[0029] Furthermore, a water stop strip is provided at the combined part of each template during mold closing to prevent slurry leakage during concrete pouring.

[0030] Compared with the prior art, the present invention has the following beneficial effects: When using the present invention to produce the guard plate column, first pour the crossbeam and the column, and then rotate the crossbeam column 180° and place it on the guard plate mold for pouring the guard plate concrete, which can greatly improve the quality of the exposed surface of the guard plate column and ensure the dimensional accuracy of the guard plate column. At the same time, by providing a nut limit card on the bottom mold of the crossbeam column, the installation and removal efficiency of the side mold of the crossbeam and the side mold of the column can be greatly improved, and the production efficiency can be improved. Brief Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the crossbeam column pouring mold of the present invention;

[0032] Figure 2 It is a schematic diagram of the bottom surface of the crossbeam column pouring mold of the present invention

[0033] Figure 3 It is a partial schematic diagram of the nut limit card of the crossbeam column pouring mold of the present invention;

[0034] Figure 4 It is a schematic diagram of the guard plate mold of the present invention;

[0035] Figure 5 It is a schematic diagram of the guard plate pouring of the present invention.

[0036] Description of the reference numerals in the figures: 1 - base, 2 - side form of cross beam, 201 - rib plate, 3 - side form of column, 301 - installation hole for bolt hole embedded part, 302 - installation hole for grouting hole embedded part, 303 - inclined interface, 4 - bottom form of cross beam and column, 5 - end form of column, 501 - reserved bolt hole, 6 - end form of cross beam, 601 - installation hole for sleeve, 7 - limit groove, 71 - dovetail groove, 8 - bolt, 9 - bottom form of guard plate, 10 - side form of guard plate, 11 - positioning card, 12 - rotating shaft, 13 - nut limit card. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the detailed implementation manners. The detailed implementation manners are further explanations of the principles of the present invention and do not limit the present invention in any way. The technologies identical or similar to the present invention are all within the protection scope of the present invention.

[0038] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the ratio relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0039] The terms such as "front", "rear", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration and do not limit the implementation scope of the present invention. The change or adjustment of their relative relationships, without substantial change of the technical content, should also be regarded as the implementable scope of the present invention.

[0040] As shown in the figure, the split-casting mold for the bridge guard plate column of the present invention is composed of two split molds, including a cross beam and column mold and a guard plate mold.

[0041] The cross beam and column mold includes a base 1, a bottom form of cross beam and column 4, a side form of column 3, an end form of column 5, a side form of cross beam 2, an end form of cross beam 6, a bolt 8, etc. The bottom form of cross beam and column 4 is fixed on the base 1. The size of the bottom form of cross beam and column 4 is enlarged in the width of the column and the width of the cross beam. The side form of column 3 and the side form of cross beam 2 are installed on the bottom form of cross beam and column 4. The end form of column 5 and the end form of cross beam 6 are respectively arranged at the ends of the column and the cross beam. The templates are connected by bolts 8 to form an integral body.

[0042] The guard plate mold includes a base 1, a bottom form of guard plate 9, and a side form of guard plate 10. The bottom form of guard plate 9 and the side form of guard plate 10 are both fixed on the base 1. The opening and closing of the side form of guard plate 10 are realized through a rotating shaft 12 and a bolt 8. A limit card 11 is arranged along the side form of guard plate 10.

[0043] As shown in the figure, the side formwork 2 of the crossbeam, the side formwork 3 of the column and the bottom formwork 4 of the crossbeam and column are fixed by bolts 8. A limiting groove 7 with a long hole structure is arranged at the position of the side formwork 2 of the crossbeam on the bottom formwork 4 of the crossbeam and column. After the bolts are loosened, they can slide in the limiting groove 7, avoiding the need to completely remove the bolts every time the mold is opened, and improving the efficiency of mold disassembly and assembly; a limiting groove with a dovetail groove 71 structure is arranged at the position of the side formwork 3 of the column on the bottom formwork 4 of the crossbeam and column. The limiting groove with the dovetail groove 71 structure expands away from the crossbeam at a certain angle, which can meet the requirement that the side formwork 3 of the column moves along a certain angle when the mold is disassembled. A nut limiting clamp 13 is arranged at the end position of the limiting groove 7 on the back of the bottom formwork 4 of the crossbeam and column. When the bolts 8 are tightened or loosened, the nuts can be fixed by themselves, which can greatly improve the efficiency of mold disassembly and assembly. At the same time, the front part of the nut limiting clamp 13 is set to have an enlarged opening, which is convenient for the nuts to be quickly installed in place during mold closing.

[0044] The side formwork 2 of the crossbeam close to the column side and the side formwork 3 of the column are designed as an integral structure. The side formwork 2 of the crossbeam between the columns is disconnected at the middle position, and the connecting part is set as an inclined interface 303, which is convenient for the side formwork 3 of the column and the connected side formwork 2 of the crossbeam to be smoothly removed during mold disassembly.

[0045] Bolt hole embedded part installation holes 301 and grouting hole embedded part installation holes 302 are arranged on the side formwork 2 of the crossbeam. Sleeve installation holes 601 are arranged on the end formwork 5 of the column and the end formwork 6 of the crossbeam, and bolt holes 501 are reserved on the end formwork of the column.

[0046] Slots are arranged on the positioning clamps 11, and there are no less than two positioning clamps 11 at each place, ensuring the precise positioning of the crossbeam and column when pouring the concrete of the protective plate. The side formwork 10 of the protective plate adopts a hinged mold opening method through a rotating shaft 12.

[0047] The crossbeam and column mold and the protective plate mold will be specifically described below:

[0048] Crossbeam and column mold:

[0049] The bottom formwork 4 of the crossbeam and column is installed on the base 1 to ensure the overall flatness. The side formwork 2 of the crossbeam and the side formwork 3 of the column are both installed on the bottom formwork 4 of the crossbeam and column; the side formwork 2 of the crossbeam close to the column side and the side formwork 3 of the column are integrally designed. The side formwork 2 of the crossbeam between the columns is disconnected at the middle part, and the mold closing part is set as an inclined interface 303, which is convenient for mold disassembly;

[0050] The side formwork 2 of the crossbeam, the side formwork 3 of the column and the bottom formwork 4 of the crossbeam and column are fixed by bolts 8. A limit groove 7 is provided on the bottom formwork 4 of the crossbeam and column. After the bolts 8 are loosened, they can slide in the limit groove 7, avoiding the need to completely remove the bolts 8 every time the formwork is opened, and improving the efficiency of formwork removal and assembly; the limit groove below the side formwork 3 of the column expands away from the crossbeam at a certain angle to form a structure similar to a dovetail groove 71, which can meet the requirement that the side formwork 3 of the column moves along a certain angle when the formwork is removed; a nut limit clamp 13 is provided at the end position of the limit groove 7 on the back of the bottom formwork 4 of the crossbeam and column. The nut can be fixed by itself when the bolt 8 is tightened or loosened, which can greatly improve the efficiency of formwork removal and assembly. At the same time, the front part of the nut limit clamp 13 is set to have an enlarged opening, which is convenient for the nut to be quickly installed in place during formwork closing.

[0051] On the side formwork 2 of the crossbeam, there are bolt hole embedded part installation holes 301 and grouting hole embedded part installation holes 302; the end formwork 5 of the column is fixed to the side formwork 3 of the column and the bottom formwork 4 of the crossbeam and column by bolts 8; the end formwork 6 of the crossbeam is fixed to the side formwork 2 of the crossbeam and the bottom formwork 4 of the crossbeam and column by bolts 8; sleeve installation holes 601 are provided on the end formwork 5 of the column and the end formwork 6 of the crossbeam, and reserved bolt holes 501 are also provided on the end formwork 5 of the column.

[0052] Guard plate mold:

[0053] The bottom formwork 9 of the guard plate is installed on the base 1 to ensure the overall flatness. The side formwork 10 of the guard plate is fixed to the base 1 by a rotating shaft 12. The side formwork 10 of the guard plate adopts a hinged formwork opening and closing method and is fixed by bolts 8 during formwork closing; positioning cards 11 are installed along the side formwork 10 of the guard plate. Grooves are provided on the positioning cards 11. Each positioning card 11 has no less than two pieces to ensure the precise positioning of the crossbeam and column during the concrete pouring of the guard plate.

[0054] In order to ensure the overall flatness of the side formwork 2 of the crossbeam, the side formwork 3 of the column and the side formwork 10 of the guard plate and avoid deformation during use, rib plates 201 are provided on the outer sides of the side formwork 2 of the crossbeam, the side formwork 3 of the column and the side formwork 10 of the guard plate.

[0055] Waterstop strips are provided at the formwork closing parts to prevent slurry leakage during concrete pouring.

[0056] The working principle of the split-casting mold for the bridge guard plate column of the present invention is as follows: First, pour the concrete of the crossbeam and column. After the crossbeam and column reach the demolding strength, demold them. After demolding, rotate the crossbeam and column by 180° and place them on the guard plate mold, and then pour the concrete of the guard plate.

[0057] The specific pouring method steps are as follows:

[0058] Concrete pouring of the crossbeam and column:

[0059] S11. Clean all templates, embedded parts, etc. After pushing the side formwork 2 of the crossbeam and the side formwork 3 of the column to the mold closing position, tighten all bolts 8 on the side formwork 2 of the crossbeam and the side formwork 3 of the column, and then install the end formwork 6 of the crossbeam and the end formwork 5 of the column in place;

[0060] S12. Spray release agent and install the steel bar cage, embedded parts, etc.;

[0061] S13. Carry out concrete pouring and curing;

[0062] S14. When the concrete specimens cured under the same conditions meet the demolding requirements, carry out demolding and demolding of the crossbeam and column. When demolding, install a lifting tool in the sleeve 601 as the lifting point;

[0063] S15. Turn the guard plate column integrally by 180°;

[0064] Guard plate concrete pouring:

[0065] S21. Clean all templates. After turning the side formwork 10 of the guard plate in place around the rotating shaft in sequence, tighten all bolts 8 on the side formwork 10 of the guard plate and spray release agent;

[0066] S22. Chip the contact surface between the crossbeam and column that has been poured and consolidated with the guard plate, and connect the guard plate steel bars with the crossbeam and column steel bars;

[0067] S23. Lift the crossbeam and column onto the guard plate mold, and use the limit card 11 and the bolts 8 installed in the sleeve of the crossbeam and column to accurately position the crossbeam and column, and carry out guard plate concrete pouring and curing;

[0068] Or, first carry out guard plate concrete pouring on the guard plate mold, and then immediately lift the crossbeam and column onto the guard plate mold for accurate positioning, and carry out guard plate concrete pouring and curing;

[0069] S24. Carry out demolding and demolding when the concrete meets the demolding requirements.

Claims

1. A split casting method for bridge guard plate columns, characterized in that: The split structure of the beam column mold and the guard plate mold is used for two pourings; among which: The beam column mold includes a base, a beam column bottom mold, a column side mold, a column end mold, a beam side mold, and a beam end mold; the beam column bottom mold is fixed on the base, the column side mold and the beam side mold are installed on the beam column bottom mold to form a beam column casting groove, the column end mold and the beam end mold are respectively provided at the column end and the beam end, and the molds are connected by bolts to form a whole; The guard plate mold includes a base, a guard plate bottom mold, and a guard plate side mold; the guard plate bottom mold is fixed on the base, and the guard plate side molds are multiple groups, and each group of guard plate side molds can be flipped and hinged with the guard plate bottom mold through a rotating shaft to form an open and close mold; when the guard plate side molds are closed, they are connected and fixed by bolts to form a guard plate casting groove; a positioning card for positioning the beam and column casting parts is set on the upper edge of the guard plate side mold; The casting method includes: first casting the beam column concrete, demoulding when the beam column reaches the demoulding strength, rotating the beam column 180 degrees after demoulding and placing it on the guard plate mold, and then casting the guard plate concrete.

2. The method for casting the bridge guard plate column separately according to claim 1 is characterized in that The specific steps include: S1. Concrete pouring of beams and columns: S11. Clean all templates, embedded parts, etc., push the beam side mold and column side mold to the mold closing position, tighten all bolts on the beam side mold and column side mold, and install the beam end mold and column end mold in place; S12, spray release agent, install steel frame and embedded parts; S13, pouring and curing concrete; S14. When the concrete reaches the demoulding requirements, the molds are removed and the beams and columns are demoulded. During demoulding, a hoisting device is installed in the sleeve as a hoisting point; S15, turning the guard plate column 180 degrees as a whole; S2. Casting of guard plate concrete: S21. Clean all the templates, rotate the side templates of the guard plate around the rotation axis in order, tighten all the bolts on the side templates of the guard plate, and spray the release agent; S22, roughening the contact surface between the poured and consolidated beam column and the guard plate, and connecting the guard plate reinforcement with the beam column reinforcement; S23, hoisting the beam column onto the guard plate mold, accurately positioning the beam column using the limit card and the bolts installed in the sleeve of the beam column, and pouring and curing the guard plate concrete; Or, first pour the guard plate concrete on the guard plate mold, then immediately hoist the beam column onto the guard plate mold for precise positioning, and then pour and maintain the guard plate concrete; S24. When the concrete meets the demoulding requirements, the formwork is removed and demoulding is carried out.

3. The split casting method for bridge guard plate columns according to claim 2 is characterized in that: The base of the beam column mold and the base of the guard plate mold both include a plurality of support beams fixedly arranged on the ground.

4. The split casting method for bridge guard plate columns according to claim 2 is characterized in that: The crossbeam side mold, column side mold and crossbeam column bottom mold are connected and fixed by bolts. The crossbeam column bottom mold is provided with a limiting groove of a long hole structure for connecting with the crossbeam side mold. The bolts pass through the connecting holes provided in the crossbeam side mold and the limiting groove of the long hole structure and can be adjusted and connected and fixed in the limiting groove; the crossbeam column bottom mold is also provided with a limiting groove of a dovetail groove structure for connecting with the column side mold. The bolts pass through the connecting holes provided in the column side mold and the limiting groove of the dovetail groove structure and can be adjusted and connected and fixed in the limiting groove.

5. The split casting method for bridge guard plate columns according to claim 4 is characterized in that: A nut limiting card is arranged at the end of the limiting groove on the back side of the bottom mold of the beam column. The nut limiting card has a limiting sliding groove arranged in the same direction as the limiting groove, and the opening end gradually expands to form a dovetail groove structure.

6. The split casting method for bridge guard plate columns according to claim 2 is characterized in that: The crossbeam side mold comprises an integral crossbeam side mold at the bottom end of the crossbeam column mold and a segmented crossbeam side mold on the column side. The segmented crossbeam side mold and the column side mold are an integrated fixed structure. The connecting part of the two segmented crossbeam side molds is arranged in the middle and is arranged as an oblique interface structure.

7. The split casting method for bridge guard plate columns according to claim 2 is characterized in that: The beam side mold is provided with bolt hole embedded part installation holes and grouting hole embedded part installation holes; the column end mold and the beam end mold are provided with sleeve installation holes.

8. The split casting method for bridge guard plate columns according to claim 2 is characterized in that: The positioning card is provided with a card slot with a groove structure, and the limit card includes two positioning cards for positioning the end of the casting and consolidation beam, and two positioning cards for positioning the end of the casting and consolidation column.

9. The split casting method for bridge guard plate columns according to claim 2 is characterized in that: Support ribs are arranged on the outer sides of the templates of the beam side formwork, the column side formwork and the guard plate side formwork.

10. The split casting method of bridge guard plate column according to claim 2 is characterized in that: Waterstop strips are provided at each formwork joint to prevent leakage during concrete pouring.

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