CN113635435A - Method for prefabricating non-fixed-end die matching of section beam - Google Patents
Method for prefabricating non-fixed-end die matching of section beam Download PDFInfo
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- CN113635435A CN113635435A CN202110954932.XA CN202110954932A CN113635435A CN 113635435 A CN113635435 A CN 113635435A CN 202110954932 A CN202110954932 A CN 202110954932A CN 113635435 A CN113635435 A CN 113635435A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 16
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 8
- 238000009417 prefabrication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
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- 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
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
-
- 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
- B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a method for prefabricating a segmental beam without fixed end die matching, which comprises the steps of pouring a first segmental beam body on a prefabricating pedestal, arranging a characteristic plane and a height measuring point on the top surface of the beam body, performing completion measurement, moving the beam body to a matching position, roughly adjusting and then fixing to form a matched beam body; accurately adjusting the spatial position of the end template of the beam to be cast according to the characteristic measuring points of the top surface of the matched beam body and the target geometric relation characteristic between the matched beam and the beam to be cast, and controlling the adjustment deviation within 2 mm; in the matching process, the matching beam is kept still, the end template, the bottom die and the side die of the beam to be cast are reversely adjusted to realize and ensure the geometric linear relationship of adjacent sections of beam bodies, the beam sections do not need to be finely adjusted, the requirements on a beam moving trolley and beam adjusting equipment are reduced, the equipment and construction measure cost can be saved, and the construction efficiency is improved; because the movable end die is light in weight and flexible and quick in die adjustment, time and labor are saved when the section beam is adjusted, the work efficiency can be improved, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of bridge section beam prefabrication, in particular to a method for prefabricating a section beam without a fixed end mold in a matching manner.
Background
The conventional short-line prefabrication principle:
the matched prefabrication by a short line method is characterized in that a large-span continuous beam is divided into a plurality of sections according to a certain principle, 6 control points are arranged on the top surface of each section, and the space position of each section can be determined according to the three-dimensional coordinates of the control points under a whole coordinate system.
Geodetic coordinates (X) through 6 control points of the segment top surface0，Y0) And elevation Z0Its approximation is taken as a space coordinate (X)0、Y0、Z0) The space position (X) of the segment in the prefabricated pedestal can be obtained by translating and rotating the segment to the local coordinate system of the fixed end diei，Yi，Zi) During the transformation, the default length is not deformed, and the position of any point in the three-dimensional space is considered to be formed by combining the translation with the vector characteristic and the rotation with the 3 × 3 rotation matrix characteristic, and the formula is as follows:
measuring and lofting each segment on the prefabricated pedestal by using a total station and a level gauge and referring to the fixed end die datum; after the segment is poured, completion measurement is carried out in time, local coordinates and elevations of control points on the top surface of the segment are collected, and then the local coordinates are converted into overall coordinates through reverse conversion, namely the completion line type of the segment. And obtaining target matching data of the segment to be poured in the local coordinate system through the completion coordinate of the previous segment and the theoretical coordinate of the segment to be poured in the global coordinate system. According to the target matching data, the matching beam is accurately measured and positioned, after the pouring of the beam to be poured is completed, completion measurement is carried out on the beam to be poured and the matching beam, and the local coordinates and elevations of the control points on the top surfaces of the two segments are collected at the same time (see figure 1); and then the completion coordinates of the beam to be cast can be calculated according to the overall completion coordinates and the local completion coordinates of the control points of the matched beam sections, and the matched casting of each section is completed by circulating the process. Under the condition of matching of a traditional segmental beam, one side of a beam section to be cast is a fixed end template, the other side of the beam section to be cast is a beam end of the matched beam section, the fixed end template is locked after being in place, and the geometric relation between the beam section to be cast and the matched beam is obtained by adjusting the space posture of the matched beam; it is necessary to provide a completely new method for matching and prefabricating the section beam.
Disclosure of Invention
The invention aims to provide a method for prefabricating a segmental beam without a fixed end die in a matching way.
The invention is realized by the following technical scheme:
a method for prefabricating a segmental beam without a fixed end mould in a matching mode comprises the following steps:
s1, pouring a first beam body on the prefabricated pedestal, and laying a characteristic plane and an elevation measurement point on the top surface of the beam body for completion measurement;
s2, moving the beam body to a matching position, roughly adjusting and then fixing to form a matching beam body;
step S3, accurately adjusting the spatial position of the end template of the beam to be cast according to the characteristic measuring points of the top surface of the matching beam body and the target geometric relation characteristic between the matching beam and the beam to be cast, adjusting the deviation to be controlled within 2mm, and locking the end template;
step S4, closing the bottom die and the side die between the end template and the matching beam;
step S5, after the end template, the bottom die and the side die of the beam to be cast are closed, measuring and checking the spatial position of the beam to be cast again and the relative relation between the spatial position and the characteristic measuring point of the matched beam, wherein the deviation is controlled within 2mm, otherwise, continuously adjusting the spatial position to be cast to the deviation range;
s6, after the bottom die and the side die of the beam to be cast are reinforced, hoisting the reinforcing steel bars of the beam body into the die, adjusting the position of the prestressed pipeline, installing the inner die and the embedded part, and rechecking the relative geometric relationship between the template and the matched beam;
step S7, pouring concrete to the beam to be cast, burying measuring characteristic points in the top surface of the beam to be cast after the concrete is solidified, and performing completion measurement;
and S8, repeating the steps S2-S7, and pouring the beam body section by section until all the beam sections are finished.
Further, in the step S1, the number of feature planes and elevation measurement points arranged on the top surface of the beam body is 6.
The invention has the beneficial effects that:
in the matching process, the matching beam is kept still, the end template, the bottom die and the side die of the beam to be cast are reversely adjusted to realize and ensure the geometric linear relationship of adjacent sections of beam bodies, the beam sections do not need to be finely adjusted, the requirements on a beam moving trolley and beam adjusting equipment are reduced, the equipment and construction measure cost can be saved, and the construction efficiency is improved; because the movable end die is light in weight and flexible and quick in die adjustment, time and labor are saved when the section beam is adjusted, the work efficiency can be improved, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of the layout and measurement of feature points under matched conditions;
FIG. 2 is a schematic diagram of two working conditions under a conventional segmental beam matching prefabrication scheme;
FIG. 3 is a schematic diagram of two working conditions under the matching prefabrication scheme of the invention.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
It should be noted that the descriptions referring to "first" and "second" in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the present invention, unless expressly stated or limited otherwise, the term "coupled" is to be interpreted broadly, e.g., "coupled" may be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 3, and also to fig. 2, a method for formless matched prefabrication of a section beam without a fixed end comprises the following steps:
s1, pouring a first beam body on the prefabricated pedestal, and laying a characteristic plane and an elevation measurement point on the top surface of the beam body for completion measurement;
s2, moving the beam body to a matching position, roughly adjusting and then fixing to form a matching beam body; it should be noted that the beam section does not need to be finely adjusted, the requirements on the beam moving trolley and the beam adjusting equipment are reduced, the equipment and construction measure cost can be saved, and the construction efficiency is improved.
Step S3, accurately adjusting the spatial position of the end template of the beam to be cast according to the characteristic measuring points of the top surface of the matching beam body and the target geometric relation characteristic between the matching beam and the beam to be cast, adjusting the deviation to be controlled within 2mm, and locking the end template; it should be noted that, because the movable end die is light in weight and flexible and rapid in die adjustment, time and labor are saved when the section beam is adjusted, work efficiency can be improved, and cost is saved.
Step S4, closing the bottom die and the side die between the end template and the matching beam;
step S5, after the end template, the bottom die and the side die of the beam to be cast are closed, measuring and checking the spatial position of the beam to be cast again and the relative relation between the spatial position and the characteristic measuring point of the matched beam, wherein the deviation is controlled within 2mm, otherwise, continuously adjusting the spatial position to be cast to the deviation range;
s6, after the bottom die and the side die of the beam to be cast are reinforced, hoisting the reinforcing steel bars of the beam body into the die, adjusting the position of the prestressed pipeline, installing the inner die and the embedded part, and rechecking the relative geometric relationship between the template and the matched beam;
step S7, pouring concrete to the beam to be cast, burying measuring characteristic points in the top surface of the beam to be cast after the concrete is solidified, and performing completion measurement;
and S8, repeating the steps S2-S7, and pouring the beam body section by section until all the beam sections are finished.
Specifically, in the embodiment of the present invention, in step S1, the number of feature planes and elevation measurement points arranged on the top surface of the beam body is 6.
In the matching process, the matching beam is kept still, the end template, the bottom die and the side die of the beam to be cast are reversely adjusted to realize and ensure the geometric linear relationship of adjacent sections of beam bodies, the beam sections do not need to be finely adjusted, the requirements on a beam moving trolley and beam adjusting equipment are reduced, the equipment and construction measure cost can be saved, and the construction efficiency is improved; because the movable end die is light in weight and flexible and quick in die adjustment, time and labor are saved when the section beam is adjusted, the work efficiency can be improved, and the cost is saved.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (2)
1. A method for prefabricating a segmental beam without a fixed end die in a matching manner is characterized by comprising the following steps:
s1, pouring a first beam body on the prefabricated pedestal, and laying a characteristic plane and an elevation measurement point on the top surface of the beam body for completion measurement;
s2, moving the beam body to a matching position, roughly adjusting and then fixing to form a matching beam body;
step S3, accurately adjusting the spatial position of the end template of the beam to be cast according to the characteristic measuring points of the top surface of the matching beam body and the target geometric relation characteristic between the matching beam and the beam to be cast, adjusting the deviation to be controlled within 2mm, and locking the end template;
step S4, closing the bottom die and the side die between the end template and the matching beam;
step S5, after the end template, the bottom die and the side die of the beam to be cast are closed, measuring and checking the spatial position of the beam to be cast again and the relative relation between the spatial position and the characteristic measuring point of the matched beam, wherein the deviation is controlled within 2mm, otherwise, continuously adjusting the spatial position to be cast to the deviation range;
s6, after the bottom die and the side die of the beam to be cast are reinforced, hoisting the reinforcing steel bars of the beam body into the die, adjusting the position of the prestressed pipeline, installing the inner die and the embedded part, and rechecking the relative geometric relationship between the template and the matched beam;
step S7, pouring concrete to the beam to be cast, burying measuring characteristic points in the top surface of the beam to be cast after the concrete is solidified, and performing completion measurement;
and S8, repeating the steps S2-S7, and pouring the beam body section by section until all the beam sections are finished.
2. The method for prefabricating the non-fixed-end mode matching of the section beam according to claim 1, wherein the method comprises the following steps of: in step S1, the number of feature planes and elevation measurement points arranged on the top surface of the beam body is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110954932.XA CN113635435A (en) | 2021-08-19 | 2021-08-19 | Method for prefabricating non-fixed-end die matching of section beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110954932.XA CN113635435A (en) | 2021-08-19 | 2021-08-19 | Method for prefabricating non-fixed-end die matching of section beam |
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| CN113635435A true CN113635435A (en) | 2021-11-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114603683A (en) * | 2022-01-14 | 2022-06-10 | 中交第二航务工程局有限公司 | Method for quickly prefabricating concrete segment box girder |
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| CN112339077A (en) * | 2020-10-30 | 2021-02-09 | 中铁大桥局第九工程有限公司 | Side mould for curve beam prefabricated segment and construction method of prefabricated segment |
| CN112936524A (en) * | 2021-04-10 | 2021-06-11 | 山东博远重工有限公司 | Novel movable end die fixing structure |
| CN113246272A (en) * | 2021-06-18 | 2021-08-13 | 中交第二航务工程局有限公司 | Section beam prefabricating template system based on non-matching beam and prefabricating method |
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2021
- 2021-08-19 CN CN202110954932.XA patent/CN113635435A/en active Pending
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| WO2017166160A1 (en) * | 2016-03-31 | 2017-10-05 | 中交第二航务工程局有限公司 | Short-line match-casting-based precast template system for girder bridge having composite structure and corrugated steel webs |
| CN205741872U (en) * | 2016-06-13 | 2016-11-30 | 中交第二航务工程局有限公司 | A kind of Novel box beam-ends modular system |
| CN108385527A (en) * | 2018-02-07 | 2018-08-10 | 中交公局第二工程有限公司 | A kind of superelevation runoff section segment girder precast measures and monitoring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114603683A (en) * | 2022-01-14 | 2022-06-10 | 中交第二航务工程局有限公司 | Method for quickly prefabricating concrete segment box girder |
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Application publication date: 20211112 |