CN113430941B - Construction method for prefabricating inclined beam end single-line box beam on standard single-line box beam template - Google Patents
Construction method for prefabricating inclined beam end single-line box beam on standard single-line box beam template Download PDFInfo
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- CN113430941B CN113430941B CN202110711201.2A CN202110711201A CN113430941B CN 113430941 B CN113430941 B CN 113430941B CN 202110711201 A CN202110711201 A CN 202110711201A CN 113430941 B CN113430941 B CN 113430941B
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The invention relates to the technical field of building pouring, in particular to a construction method for prefabricating an inclined beam end single-line box beam on a standard single-line box beam template, which comprises the following steps: s1, finding a line center line A according to the line plane size of a prefabricated box girder, wherein the line center line A is the center line of a bottom plate of the prefabricated box girder; s2, finding a center point B of the center line A in the step S1, wherein the center point B is a centering center point of a standard box girder template, and measuring the distance from the centering center point of the template to the girder end according to the length of the center line A to determine a center point C of the girder end. The invention can avoid the difficulties in the cast-in-situ process, compares the size of the beam end of the inclined box beam with the standard template, slightly reforms the standard template, realizes the purpose of prefabrication on a beam making pedestal, and reduces the manufacturing difficulty in a prefabrication process mode.
Description
Technical Field
The invention relates to the technical field of building pouring, in particular to a construction method for prefabricating an inclined beam end single-line box beam on a standard single-line box beam template.
Background
In a large building, a box girder is often required to be prefabricated in the construction process, the box girder is generally manufactured by steel bars and concrete, the box girder of a reinforced concrete structure is divided into a prefabricated box girder and a cast-in-situ box girder, and the box girder prefabricated in a separate place can be erected after the lower engineering is completed by combining a bridge girder erection machine, so that the engineering progress can be accelerated, and the construction period can be saved; and cast-in-situ box girders are mostly used for large continuous bridges. The steel box girder is also called a steel plate box girder, is a common structural form of a large-span bridge, is generally used on a bridge with a large span, and is like a box in appearance, so that the steel box girder is called a box girder.
The inclined box girder is in the type of box girders and extends obliquely in the building, and the single-line box girder at the inclined girder end in the prior art mostly adopts a cast-in-situ process, but the cast-in-situ process is difficult in quality control, more in working procedures and high in labor intensity in the cast-in-situ manufacturing mode.
Disclosure of Invention
The invention provides a construction method for prefabricating an inclined beam end single-line box beam on a standard single-line box beam template, which can avoid the difficulties in a cast-in-situ process, compare the size of the inclined box beam end with the size of the standard template, slightly reform the standard template, realize the prefabrication on a beam making pedestal, and reduce the manufacturing difficulty through a prefabrication process mode.
The invention provides a construction method for prefabricating an inclined beam end single-line box beam on a standard single-line box beam template, which comprises the following steps:
s1, finding a line center line A according to the line plane size of a prefabricated box girder, wherein the line center line A is the center line of a bottom plate of the prefabricated box girder;
s2, finding a center point B of the center line A in the step S1, wherein the center point B is a centering center point of a standard box girder template, and measuring the distance from the centering center point of the template to the girder end according to the length of the center line A to determine a center point C of the girder end;
s3, extending along the direction perpendicular to the central line A through the central line A midpoint to find the central line D of the lateral baffle of the box girder standard template, and then measuring out a girder end point E of the lateral baffle on the standard template according to the plane size of the prefabricated box girder on the line;
s4, after finding the center point B, the center point C and the beam end point E at the end of a standard box beam template according to the steps S1 to S3, determining a positioning surface F through three points, wherein the positioning surface F is the installation position of an end mould of the prefabricated box beam during prefabrication;
s5, finding the end surfaces at two ends of the mould on the steel bar binding mould according to the method of the steps S1 to S4;
s6, beginning to bind the steel bars;
s7, hoisting the reinforcement cage;
s8, installing an end die, wherein the end die fixing position is fixed according to the center point B, the center point C and the beam end point E which are determined before;
s9, installing an inner mold;
s10, pouring concrete.
According to the construction method for prefabricating the single-line box girder at the inclined girder end on the standard single-line box girder template, in the step S3, the prefabricated girder is the inclined girder end, and the standard side mould has insufficient length, so that the side mould needs to be lengthened.
According to the construction method for prefabricating the single-line box girder at the inclined girder end on the standard single-line box girder template, in the step S5, because the prefabricated girder is the inclined girder end, the standard mould can have a position with insufficient length, so the mould needs to be lengthened.
According to the construction method for prefabricating the single-line box girder at the end of the inclined girder on the standard single-line box girder template, in the step S8, the end mould of the inclined girder is provided with the corresponding anchor hole according to the inclination angle, and the anchor hole is detachably connected with the end mould.
According to the construction method for prefabricating the inclined beam end single-line box beam on the standard single-line box beam template, the anchor holes are connected with the end mould through bolts.
According to the construction method for prefabricating the inclined beam end single-line box beam on the standard single-line box beam template, concrete is mixed in advance before the concrete is poured.
According to the construction method for prefabricating the single-line box girder at the inclined girder end on the standard single-line box girder template, concrete in the box girder is vibrated in the process of pouring the concrete, and leakage vibration and over vibration cannot be caused.
According to the construction method for prefabricating the inclined beam end single-line box beam on the standard single-line box beam template, the auxiliary vibrator is mainly used for vibrating concrete, and the manual vibration is auxiliary.
According to the construction method for prefabricating the single-line box girder at the inclined girder end on the standard single-line box girder template, the girder surface of the box girder is leveled after concrete pouring is completed.
According to the construction method for prefabricating the single-line box girder at the inclined girder end on the standard single-line box girder template, after concrete pouring is completed, geotextile is covered on the girder surface of the box girder in time, and water is sprayed and maintained.
According to the construction method for prefabricating the single-line box girder at the inclined girder end on the standard single-line box girder template, the inclined box girder is prefabricated in a prefabricating mode, and the prefabricating process is modification in two aspects, namely, a steel bar binding mould is correspondingly modified into the same according to the structural size of the single-line box girder at the inclined girder end, so that the steel bar skeleton bound on the mould is ensured to meet the requirement of a girder body; and secondly, a single-line box girder standard template is modified, and the single-line box girder structure size at the inclined girder end is modified to meet the requirement of the structure size. In summary, the size of the beam end of the inclined box beam is compared with the size of the standard template, the standard template is slightly modified, the aim of prefabricating on a beam making pedestal is fulfilled, and the manufacturing difficulty is reduced through a prefabricating process mode.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a construction process flow of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following describes a construction method for prefabricating an inclined beam end single-line box beam on a standard single-line box beam template by combining with fig. 1, and the embodiment comprises the following steps:
s1, finding a line center line A according to the line plane size of a prefabricated box girder, wherein the line center line A is the center line of a bottom plate of the prefabricated box girder;
s2, finding a center point B of the center line A in the step S1, wherein the center point B is a centering center point of a standard box girder template, and measuring the distance from the centering center point of the template to the girder end according to the length of the center line A to determine a center point C of the girder end;
s3, extending along the direction perpendicular to the central line A through the central line A midpoint to find the central line D of the lateral baffle of the box girder standard template, and then measuring out a girder end point E of the lateral baffle on the standard template according to the plane size of the prefabricated box girder on the line;
s4, after finding the center point B, the center point C and the beam end point E at the end of a standard box beam template according to the steps S1 to S3, determining a positioning surface F through three points, wherein the positioning surface F is the installation position of an end mould of the prefabricated box beam during prefabrication;
s5, finding the end surfaces at two ends of the mould on the steel bar binding mould according to the method of the steps S1 to S4;
s6, beginning to bind the steel bars;
s7, hoisting the reinforcement cage;
s8, installing an end die, wherein the end die fixing position is fixed according to the center point B, the center point C and the beam end point E which are determined before;
s9, installing an inner mold;
s10, pouring concrete.
According to the construction method, the inclined box girder is prefabricated in a prefabrication mode, the prefabrication process is modification in two aspects, firstly, the steel bar binding clamping fixture is correspondingly modified to be the same according to the structural size of the single-line box girder at the end of the inclined girder, and the steel bar skeleton bound on the clamping fixture is guaranteed to meet the requirement of a girder body; and secondly, a single-line box girder standard template is modified, and the single-line box girder structure size at the inclined girder end is modified to meet the requirement of the structure size. In summary, the size of the beam end of the inclined box beam is compared with the size of the standard template, the standard template is slightly modified, the aim of prefabricating on a beam making pedestal is fulfilled, and the manufacturing difficulty is reduced through a prefabricating process mode.
Specifically, in step S3, since the precast beam is an inclined beam end, the standard type side mold may have a position of insufficient length, so the side mold needs to be lengthened.
Specifically, in step S5, since the precast beam is an inclined beam end, the standard mold may have a position of insufficient length, so the mold needs to be lengthened.
Specifically, in step S8, the end mold of the inclined beam is installed with a corresponding anchor pocket according to the inclination angle, and the anchor pocket and the end mold are detachably connected.
Specifically, the anchor cavities are connected with the end dies by bolts.
Specifically, before casting the concrete, the concrete is mixed in advance so that the concrete is sufficiently and uniformly stirred.
Specifically, in the process of pouring concrete, the concrete in the box girder is vibrated, vibration leakage and vibration exceeding cannot be caused, the box girder concrete is enabled to be more compact, and the strength of the box girder is ensured.
Specifically, the auxiliary vibrator is mainly used for vibrating the concrete, the manual vibration is auxiliary, the compacting effect of the concrete is further improved, and the strength of the box girder is ensured.
Specifically, the girder surface of the box girder is leveled after concrete pouring is completed, so that the girder surface of the box girder is leveled and is convenient to put into use.
Specifically, after concrete pouring is completed, the beam surface of the box beam is covered with geotextile in time and is subjected to watering maintenance.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The construction method for prefabricating the inclined beam end single-line box beam on the standard single-line box beam template is characterized by comprising the following steps:
s1, finding a line center line A according to the line plane size of a prefabricated box girder, wherein the line center line A is the center line of a bottom plate of the prefabricated box girder;
s2, finding a center point B of the center line A in the step S1, wherein the center point B is a centering center point of a standard box girder template, and measuring the distance from the centering center point of the template to the girder end according to the length of the center line A to determine a center point C of the girder end;
s3, extending along the direction perpendicular to the central line A through the central line A midpoint to find the central line D of the lateral baffle of the box girder standard template, and then measuring out a girder end point E of the lateral baffle on the standard template according to the plane size of the prefabricated box girder on the line;
s4, after finding the center point B, the center point C and the beam end point E at the end of a standard box beam template according to the steps S1 to S3, determining a positioning surface F through three points, wherein the positioning surface F is the installation position of an end mould of the prefabricated box beam during prefabrication;
s5, finding the end surfaces at two ends of the mould on the steel bar binding mould according to the method of the steps S1 to S4;
s6, beginning to bind the steel bars;
s7, hoisting the reinforcement cage;
s8, installing an end die, wherein the end die fixing position is fixed according to the center point B, the center point C and the beam end point E which are determined before;
s9, installing an inner mold;
s10, pouring concrete.
2. The construction method of prefabricating an inclined beam-end single-line box girder on a standard single-line box girder formwork according to claim 1, wherein in the step S3, since the prefabricated girder is an inclined beam end, a standard side form may have a position of insufficient length, so that the side form needs to be lengthened.
3. The construction method for prefabricating the inclined beam-end single-line box girder on the standard single-line box girder formwork according to claim 1, wherein in the step S5, since the prefabricated girder is an inclined beam-end, the standard mould has insufficient length, so the mould needs to be lengthened.
4. The construction method for prefabricating the inclined beam end single-line box girder on the standard single-line box girder template according to claim 1, wherein in the step S8, the end mould of the inclined beam is installed with corresponding anchor cavities according to the inclination angle, and the anchor cavities are detachably connected with the end mould.
5. The construction method for prefabricating the inclined beam end single-line box beam on the standard single-line box beam template according to claim 4, wherein the anchor cavities are connected with the end dies through bolts.
6. The construction method for prefabricating the inclined beam-end single-line box girder on the standard single-line box girder formwork according to claim 1, wherein the concrete is mixed in advance before the concrete is poured.
7. The construction method for prefabricating the inclined beam-end single-line box girder on the standard single-line box girder template according to claim 1, wherein the concrete in the box girder is vibrated in the process of pouring the concrete, and vibration leakage and over vibration cannot be caused.
8. The construction method for prefabricating the inclined beam-end single-line box beam on the standard single-line box beam template according to claim 1, wherein the auxiliary vibrator is mainly used for vibrating concrete and the manual vibrator is auxiliary.
9. The construction method for prefabricating the inclined beam-end single-line box girder on the standard single-line box girder template according to claim 1, wherein the girder surface of the box girder is leveled after the concrete pouring is completed.
10. The construction method for prefabricating the inclined beam-end single-line box beam on the standard single-line box beam template according to claim 1, wherein after concrete pouring is completed, the beam surface of the box beam is covered with geotextile in time and is subjected to watering maintenance.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU715693A1 (en) * | 1977-10-24 | 1980-02-15 | Государственный Всесоюзный Дорожный Научно-Исследовательский Институт "Союздорнии" | Support frame for mounting expansion joint structures |
| CN102744774B (en) * | 2012-06-29 | 2014-12-03 | 浙江工业大学 | Prefabricated small box girder adjustable template for curved bridge |
| CN106677035B (en) * | 2017-03-10 | 2022-06-07 | 中铁十一局集团有限公司 | Creeping type slip form device |
| CN107471428B (en) * | 2017-08-22 | 2019-10-25 | 中铁十七局集团第三工程有限公司 | Manufacturing method in a kind of non-standard box beam field |
| CN109808054A (en) * | 2019-01-31 | 2019-05-28 | 中铁四局集团第二工程有限公司 | A kind of straight line PC track girder precast construction method |
| CN110205943B (en) * | 2019-06-29 | 2021-01-22 | 中国二十二冶集团有限公司 | Construction method for prefabricated simply-supported small box girder end cross beam |
| CN211848969U (en) * | 2020-01-10 | 2020-11-03 | 陕西路桥集团有限公司 | End template structure for pouring cantilever box girder block section |
| CN111360978A (en) * | 2020-04-30 | 2020-07-03 | 中铁十一局集团第一工程有限公司 | Prefabricated box girder end mould that can fix a position fast and demolish |
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