CN110939075B - Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam - Google Patents
Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam Download PDFInfo
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- CN110939075B CN110939075B CN201911100187.1A CN201911100187A CN110939075B CN 110939075 B CN110939075 B CN 110939075B CN 201911100187 A CN201911100187 A CN 201911100187A CN 110939075 B CN110939075 B CN 110939075B
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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
- E01D21/10—Cantilevered erection
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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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Abstract
The invention discloses a cast-in-place construction method of a support and hanging basket combination of an equal-span continuous beam edge straight section. According to the invention, the steel pipe support and the hanging basket are combined to carry out segmental and fractional cast-in-place construction on the side straight section, so that the technical problem that the steel pipe support is difficult to directly erect for cast-in-place construction due to the limitation of terrain and geological conditions is solved, the construction of the long and large side straight-line section is safely and smoothly completed, and the construction quality is ensured.
Description
Technical Field
The invention belongs to the field of bridge construction, and particularly relates to a cast-in-place construction method for a combination of a bracket and a hanging basket at a straight section of an equal-span continuous beam edge.
Background
When bridge opening side span construction is carried out in bridge construction, construction is generally divided into a plurality of sections, wherein a side straight section is constructed by adopting a steel pipe bracket in a cast-in-place mode; however, if the construction conditions are not suitable, for example, when the hole crosses the sea area, the geological conditions are complex, the sea bed at the pier position has large fluctuation, the rock face is inclined and exposed, the high-strength boulder is dense, the long straight side section is difficult to erect the steel pipe support for cast-in-place construction, the safety risk exists, and the construction quality and the construction progress are also influenced.
Disclosure of Invention
The invention provides a cast-in-place construction method of a combination of a bracket and a hanging basket at a straight section of an equal-span continuous beam edge, which solves the technical problem that a steel pipe bracket is difficult to directly erect for cast-in-place construction due to the limitation of terrain and geological conditions, and has high safety, high construction speed and high efficiency.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a cast-in-place construction method for a support and hanging basket combination of an equal-span continuous beam side straight section comprises the steps of casting a long and large side straight section in sections, wherein a section close to a pier body is cast-in-place construction in sections by steel pipe supports and relevant temporary cables are stretched, and a section far away from the pier body is cast-in-place construction in sections by hanging baskets.
Further, the step of adopting steel pipe support segmental cast-in-place construction for the side segment close to the pier body comprises the following steps:
s10, erecting a pier position side span cast-in-place steel pipe support on the bearing platform;
s11, pouring a first section of the side span cast-in-place section on the steel pipe support, temporarily locking the first section and the pier by embedding steel bars, and arranging beam seam cushion blocks in beam seams;
s12, after the strength of the first section of concrete reaches the design requirement, adopting a counterweight measure to carry out beam end weight pressing;
and S13, casting the rear section of the side span cast-in-place section on the steel pipe bracket in a cast-in-place mode, and tensioning the related temporary cable.
Further, keep away from pier shaft side segment and adopt the step of hanging basket segmentation cantilever casting construction in grades and include:
s21, installing a hanging basket on the beam surface after the concrete strength of the section close to the pier body side reaches the design requirement;
s22, hanging and pouring a first section far away from the pier body side by using a hanging basket;
and S23, after the strength of the concrete reaches the design requirement, tensioning the temporary cable, and moving the hanging basket forwards to the next section for suspension casting.
Further, pouring near the pier body side section and far away from the pier body side section while constructing other beam sections, and tensioning the prestress of the whole span after the concrete strength reaches the design requirement after the construction is finished.
And furthermore, finally, dismantling the hanging basket, the temporary cable, the weight and the beam gap cushion block.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the steel pipe support and the hanging basket are combined to carry out segmental and fractional cast-in-place construction on the side straight section, so that the technical problem that the steel pipe support is difficult to directly erect for cast-in-place construction due to the limitation of terrain and geological conditions is solved, the construction of the long and large side straight-line section is safely and smoothly completed, and the construction quality is ensured.
The support and hanging basket combined cast-in-place construction method has the advantages of high safety, high construction speed, high efficiency, safety, stability, great popularization value and good social benefit, and accumulates valuable experience for the construction of bridge and other continuous cross beams.
Drawings
FIG. 1 is a schematic view of a steel pipe and hanging basket combined cast-in-place arrangement in an embodiment of the invention.
Wherein:
1. a steel pipe bracket; 2. reinforcing steel bars; 3. beam gap cushion blocks; 4. a counterweight; 5. a temporary cable;
6. pouring a beam section; 7. a first segment; 8. a second segment; 9. a third segment; 10. a fourth segment;
11. a straight section; 12. other segments; 13. beam seams; 14. a pier body; 15. a bearing platform.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In order to make the objects and features of the present invention more comprehensible, embodiments accompanying the present invention are further described below. It is noted that the drawings are in greatly simplified form and employ non-precise ratios for the purpose of facilitating and distinctly aiding in the description of the patented embodiments of the invention.
The construction of the quan-pond strait highway-railway dual-purpose bridge is taken as an embodiment, holes B42-B43 of the quan-pond strait highway-railway dual-purpose bridge are 64m side spans, the original design is divided into 11 sections according to T structure balance for construction, wherein a pier top section 0# is constructed by adopting a triangular bracket, a section 1# to 10# is constructed by hanging basket suspension casting, and a straight section 11# with the length of 20.9m is constructed by adopting a steel pipe support cast-in-place section. As the hole spans the sea area, the geological conditions of large fluctuation of the pier position seabed, inclined and exposed rock surface, dense high-strength boulders and the like are complicated, and the depth of water of the B42 pier position is 42m, the height of the pier is 45.3m, the total depth is 87.3m, and the side straight section 11 with the length of 20.9m is difficult to erect the steel pipe support for cast-in-situ construction.
The construction method is characterized in that the site construction conditions are comprehensively considered, the hole span is divided into 13 sections for cast-in-place construction, the side straight section 11 which is adjacent to the poured beam section 6 and is 20.9m long is divided into 4 sections for construction, two sections are constructed by using the steel pipe support 1, the other two sections are constructed by using the hanging basket suspension casting construction, and the construction method is a combined cast-in-place construction method of the side straight section support with the hanging basket at the equal span.
The method comprises the following steps: erecting a pier position side span cast-in-place steel pipe bracket 1 on a bearing platform 15;
step two: pouring a first section 7 of the side span cast-in-place section on the steel pipe bracket 1, temporarily locking the first section 7 and the pier body 14 by embedding a steel bar 2, and arranging a beam gap cushion block 3 in a beam gap 13;
step three: after the strength of the concrete of the first section 7 reaches the design requirement, carrying out beam end (first section) weight pressing by using a counterweight 4 such as a water tank or a sand bag;
step four: a second section 8 of the side span cast-in-place section is cast in place on the steel pipe bracket 1, and a related temporary cable 5 is stretched; after the strength of the second section 8 concrete reaches the design requirement, a hanging basket is installed on the beam surface;
step five: hanging and casting the third section 9 by using a hanging basket;
step six: after the concrete strength of the third section 9 reaches the design requirement, tensioning the temporary cable 5, and moving the hanging basket forwards to the fourth section 10 to perform hanging casting on the fourth section;
step seven: the other sections 12 are constructed while the first section to the fourth section are poured, and after the construction is finished, the prestress of the whole hole span is tensioned after the concrete strength meets the design requirement;
step eight: and finally, removing the hanging basket, the temporary cable 5, the counterweight 4, the beam gap cushion block 3 and the like to complete the side straight section cast-in-place construction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A cast-in-place construction method of a support and hanging basket combination of an edge straight section of an equal-span continuous beam is characterized in that a long and large edge straight section is poured in sections and times, wherein a section close to a pier body is constructed in a cast-in-place mode by steel pipe supports in sections and times, related temporary cables are stretched, and a section far away from the pier body is constructed in a hanging basket in a cast-in-place mode in sections and times;
the step of adopting steel pipe support subsection cast-in-place construction in grades near pier body side subsection includes:
s10, erecting a pier position side span cast-in-place steel pipe support on the bearing platform;
s11, pouring a first section of the side span cast-in-place section on the steel pipe support, temporarily locking the first section and the pier by embedding steel bars, and arranging beam seam cushion blocks in beam seams;
s12, after the strength of the first section of concrete reaches the design requirement, adopting a counterweight measure to carry out beam end weight pressing;
s13, casting the rear section of the side span cast-in-place section on the steel pipe bracket in a cast-in-place mode, and stretching a related temporary cable;
keep away from pier shaft side segment and adopt the step of hanging basket segmentation cantilever casting construction in grades and include:
s21, installing a hanging basket on the beam surface after the concrete strength of the section close to the pier body side reaches the design requirement;
s22, hanging and pouring a first section far away from the pier body side by using a hanging basket;
and S23, after the strength of the concrete reaches the design requirement, tensioning the temporary cable, and moving the hanging basket forwards to the next section for suspension casting.
2. The cast-in-place construction method of the combination of the bracket and the hanging basket of the straight section of the edge of the uniform-span continuous beam according to claim 1, characterized in that the rest beam sections are constructed while the sections close to the pier body side and the sections far away from the pier body side are poured, and after the construction is finished, the prestress of the whole span is tensioned after the concrete strength reaches the design requirement.
3. The cast-in-place construction method of the combination of the bracket and the hanging basket of the straight section of the side of the equal-span continuous beam as claimed in claim 2, characterized in that the hanging basket, the temporary cable, the weight and the beam gap cushion block are finally removed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911100187.1A CN110939075B (en) | 2019-11-12 | 2019-11-12 | Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam |
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| CN201911100187.1A CN110939075B (en) | 2019-11-12 | 2019-11-12 | Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam |
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| CN110939075A CN110939075A (en) | 2020-03-31 |
| CN110939075B true CN110939075B (en) | 2021-09-17 |
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| CN1580413A (en) * | 2003-08-08 | 2005-02-16 | 北京建达道桥咨询有限公司 | Ground-support-free continous rigid frame bridge sidespan closure method |
| JP2010059748A (en) * | 2008-09-08 | 2010-03-18 | Sumitomo Mitsui Construction Co Ltd | Apparatus and method for constructing bridge girder |
| CN202658536U (en) * | 2012-04-11 | 2013-01-09 | 中铁三局集团有限公司 | Device for synchronous construction of continuous girder bridge cantilever side span cast-in-situ section and folding section |
| CN103556578A (en) * | 2013-10-14 | 2014-02-05 | 中铁十九局集团有限公司 | Casting mold system for straight line section and side span closure section of continuous beam and building method thereof |
| CN204080650U (en) * | 2014-10-29 | 2015-01-07 | 中铁建大桥工程局集团第五工程有限公司 | A kind of end bay for road and bridge construction closes up suspension bracket |
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
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2019
- 2019-11-12 CN CN201911100187.1A patent/CN110939075B/en active Active
Patent Citations (6)
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| CN1580413A (en) * | 2003-08-08 | 2005-02-16 | 北京建达道桥咨询有限公司 | Ground-support-free continous rigid frame bridge sidespan closure method |
| JP2010059748A (en) * | 2008-09-08 | 2010-03-18 | Sumitomo Mitsui Construction Co Ltd | Apparatus and method for constructing bridge girder |
| CN202658536U (en) * | 2012-04-11 | 2013-01-09 | 中铁三局集团有限公司 | Device for synchronous construction of continuous girder bridge cantilever side span cast-in-situ section and folding section |
| CN103556578A (en) * | 2013-10-14 | 2014-02-05 | 中铁十九局集团有限公司 | Casting mold system for straight line section and side span closure section of continuous beam and building method thereof |
| CN204080650U (en) * | 2014-10-29 | 2015-01-07 | 中铁建大桥工程局集团第五工程有限公司 | A kind of end bay for road and bridge construction closes up suspension bracket |
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
Non-Patent Citations (2)
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| 单侧悬臂挂篮法在桥梁施工中的应用;陈成叠等;《四川工业学院学报》;20031231;第74-76页 * |
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