CN102277836B - Construction method of tilting concrete tower base - Google Patents

Construction method of tilting concrete tower base Download PDF

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Publication number
CN102277836B
CN102277836B CN 201110158179 CN201110158179A CN102277836B CN 102277836 B CN102277836 B CN 102277836B CN 201110158179 CN201110158179 CN 201110158179 CN 201110158179 A CN201110158179 A CN 201110158179A CN 102277836 B CN102277836 B CN 102277836B
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tower
steel
construction
seat
tilting
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CN102277836A (en
Inventor
王学明
苟祖宽
朱长城
杨俊�
余贵钱
徐亮
石磊
周浩
高晓忠
颜旭旺
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Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
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Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
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Abstract

The invention discloses a construction method of a tilting concrete tower base which is employed in the construction of a cable-stayed bridge. The method comprises three layers of construction. A steel pipe support (2) and a stiff skeleton (6) are arranged inside the tower base to support a tendon (3), a prestressed stranded wire (4) and a steel arch tower embedded section (7). Along-tower profile steels (5) as suspension support structures for a template are embedded on both sides of the external high end of the tower base, and cushion blocks (8) are arranged to reduce the cantilever load-carrying length of the profile steels (5). The construction method disclosed by the invention successfully solves the problems of high expenditure of the preceding support method or creeping formwork construction method and not easy control of the installation accuracy and construction safety risks of the steel arch tower embedded section (7) when the tilting concrete tower base (1) is low in height, long in cantilever, large in tilting angle and high away from the foundation ground, and the steel arch tower embedded section (7) is high in dead weight. Moreover, the construction method disclosed by the invention is suitable for not only the construction of the cable-stayed bridge tower base employing the tilting steel-concrete combined tower base, but also the construction of other tilting steel-concrete combined portions.

Description

The job practices of tilting concrete towers seat
Technical field
The present invention relates to a kind of tilting cantilever steel reinforced concrete in conjunction with the job practices of tower seat.
Background technology
In traditional concrete towers seat construction, generally adopt console or adopt climbing formwork for construction., cantilever less when tilting cantilever concrete towers seat oneself height grown, the angle of inclination is big, higher from basic ground, and when pre-buried section deadweight of steel arch tower is big, adopt traditional job practices, falsework and stiff skeleton expense are too high, and steel encircles pre-buried section installation accuracy of tower and construction safety risk is wayward.
Summary of the invention
The technical problem to be solved in the present invention is: the job practices that a kind of tilting concrete towers seat is provided, solved the cantilever force problem of various members in the construction of tilting concrete towers seat, this method is safe, economical, too high to overcome falsework and stiff skeleton expense that prior art exists, and steel arch pre-buried section installation accuracy of tower and the wayward deficiency that waits of construction safety risk.
Technical scheme of the present invention is as follows: tilting concrete towers seat is divided into tri-level construction, to reduce cantilever formwork erection height, to shorten steel bar stress cantilever installation length.Stiff skeleton bearing bar bundle, steel wire bundle and steel are set in tower seat inside encircle pre-buried section of tower, high-end pre-buried suitable tower is to the suspension holdfast structure of shaped steel as template in tower seat outside.This tri-level construction comprises following process: the first floor construction, and steel pipe support is set in tower seat inside supports first floor cantilever reinforcement bundle and prestress steel twist wire harness, high-end suitable tower is to shaped steel being set, the formwork erection concreting in tower seat outside; Second layer construction, adopt pre-buried shaped steel by pull bar and carry on the back rib as the suspension holdfast structure of template, adopt stiff skeleton as the bracing frame of second layer cantilever reinforcement bundle and prestress steel twist wire harness, the top bracing of stiff skeleton is temporarily fixed on the bottom elevation of pre-buried section of steel arch tower, and the formwork erection concreting is to the following 0.1m of top bracing place; Tri-level construction is accurately adjusted top bracing and fixing pedestal and stopping means as pre-buried section of steel arch tower; And steel is encircleed pre-buried section of tower be installed on the top bracing of stiff skeleton, utilize pre-buried section braced structures as the 3rd layer of template, tendon and steel wire bundle of steel arch tower, the formwork erection concreting.
When construction tower seat first floor, arrange in tower seat inside that stiff skeleton supports 3 * 28 tendons of first floor cantilever and along tower to 4 * 15.2 prestress steel twist wire harness.
Tilt 64 ° ~ 84 ° suitable tower to shaped steel at the high-end pre-buried vertical bridge of tower seat both sides external to tilt 58 ° ~ 78 °, direction across bridge.
When the construction tower seat second layer, between first floor TOC and shaped steel, cushion block is set, to shorten the cantilever force length of shaped steel.
When the 3rd layer of construction tower seat, after accurately adjusting top bracing and fixedly securing pedestal and stopping means as pre-buried section of steel arch tower, steel is encircleed pre-buried section of tower firmly be installed on the top bracing of stiffness support.
The weight that steel arch tower is pre-buried section is 20 tons.
Construction is finished the 3rd layer of tower seat and is treated that concrete strength reaches the template system that tilting concrete towers seat is removed in 100% back.
Tilting concrete towers seat is divided into tri-level construction, to reduce cantilever formwork erection height, to shorten steel bar stress cantilever installation length.
The invention solves the cantilever force problem of various members in the construction of tilting concrete towers seat, saved cost, guaranteed that steel encircles the installation accuracy of pre-buried section of tower, is effectively controlled construction safety risk.
Description of drawings
Fig. 1 is sectional view of the present invention;
Sectional view when Fig. 2 is construction tower seat first floor;
Sectional view when Fig. 3 is the construction tower seat second layer;
The sectional view of Fig. 4 during for the 3rd layer of construction tower seat;
Fig. 5 is the A-A sectional view of Fig. 3
The specific embodiment
Tilting concrete towers seat 1 is divided into tri-level construction.The construction of tower seat first floor, 3 * 28 tendons 3 of steel pipe support 2 supporting cantilever are set in tower seat inside, along tower to 4 * 15.2 prestress steel twist wire harness 4, tilt 64 ° ~ 84 ° suitable tower to shaped steel 5 at the high-end pre-buried vertical bridge of tower seat both sides external to tilt 58 ° ~ 78 °, direction across bridge.The formwork erection concreting.
The construction of the tower seat second layer is adopted pre-buried shaped steel 5 by pull bar and is carried on the back rib as the suspension holdfast structure of template.Adopt stiff skeleton 6 as the bracing frame of cantilever reinforcement bundle 3 and prestress steel twist wire harness 4, the top bracing of stiff skeleton 6 is temporarily fixed on the bottom elevation of pre-buried section 7 in steel arch tower, between first floor TOC and shaped steel 5, cushion block 8 is set, to shorten the cantilever force length of shaped steel.The formwork erection concreting is to the following 0.1m of top bracing place.
Tower seat tri-level construction is accurately adjusted top bracing and is fixedly secured pedestal and stopping means as pre-buried section 7 in steel arch tower.20 tons heavy steel arch tower firmly is installed in for pre-buried section 7 on the top bracing of stiff skeleton 6, utilizes pre-buried section 7 braced structures as template, tendon 3 and steel wire bundle 4 of steel arch tower.The formwork erection concreting.
Construction is finished the 3rd layer of tower seat and is treated that concrete strength reaches the template system that can remove tilting concrete towers seat 1 after 100%, with construction safety and the quality that guarantees each layer.

Claims (6)

1. tilting concrete towers seat job practices, it is characterized in that: tilting concrete towers seat (1) is divided into tri-level construction, comprise following process: the first floor construction, steel pipe support (2) is set in tower seat inside supports first floor cantilever reinforcement bundle (3) and prestress steel twist wire harness (4), to shaped steel (5) is set, build the first floor concrete at the outside high-end suitable tower of tower seat; Second layer construction, adopt pre-buried shaped steel (5) by pull bar and carry on the back rib as the suspension holdfast structure of template, stiff skeleton (6) is set as the bracing frame of second layer cantilever reinforcement bundle (3) and prestress steel twist wire harness (4), the top bracing of stiff skeleton (6) is temporarily fixed on the bottom elevation of steel arch tower pre-buried section (7), and concreting is to the following 0.1m of top bracing place; Tri-level construction is accurately adjusted top bracing and fixing pedestal and stopping means as steel arch tower pre-buried section (7); And steel is encircleed tower pre-buried section (7) be installed on the top bracing of stiff skeleton (6), utilize steel arch tower pre-buried section (7) as the braced structures of the 3rd layer of template, tendon and steel wire bundle, build the 3rd layer concrete.
2. the job practices of tilting concrete towers seat according to claim 1, it is characterized in that: when construction tower seat first floor, arrange in tower seat inside that steel pipe support (2) supports 3 * 28 tendons of first floor cantilever and along tower to 4 * 15.2 prestress steel twist wire harness, tower seat both sides external high-end pre-buried along tower to shaped steel (5), the angle of inclination of shaped steel (5) and tower seat angle of inclination differ ± 10 °.
3. the job practices of tilting concrete towers seat according to claim 2 is characterized in that: tilt 64 ° ~ 84 ° suitable tower to shaped steel (5) at the high-end pre-buried vertical bridge of tower seat both sides external to tilt 58 ° ~ 78 °, direction across bridge.
4. the job practices of tilting concrete towers seat according to claim 1 is characterized in that: when the construction tower seat second layer, between first floor TOC and shaped steel (5) cushion block (8) is set, to shorten the cantilever force length of shaped steel (5).
5. the job practices of tilting concrete towers seat according to claim 1, it is characterized in that: when the 3rd layer of construction tower seat, after accurately adjusting top bracing and fixedly securing pedestal and stopping means as steel arch tower pre-buried section (7), steel is encircleed tower pre-buried section (7) firmly be installed on the top bracing of stiffness support.
6. the job practices of tilting concrete towers seat according to claim 1 is characterized in that: construction is finished the 3rd layer of tower seat and is treated that concrete strength reaches the template system that tilting concrete towers seat (1) is removed in 100% back.
CN 201110158179 2011-06-14 2011-06-14 Construction method of tilting concrete tower base Active CN102277836B (en)

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Publication number Priority date Publication date Assignee Title
CN103790115B (en) * 2014-02-20 2015-12-09 中铁十局集团第三建设有限公司 Cable stayed bridge head tower adapter section installation accessory
CN105332342B (en) * 2015-10-30 2017-01-11 中交第二航务工程局有限公司 Bridge tower cantilever gradient concrete synchronous construction method
CN105821770B (en) * 2016-04-01 2017-05-24 上海城建市政工程(集团)有限公司 Connecting and locating method for multiple tower roots and large-size concrete bearing platform foundation of steel structure main tower
CN110387824B (en) * 2019-07-12 2021-07-06 中交第二航务工程局有限公司 Cable tower creeping formwork aerial rail transfer construction method

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CN100503977C (en) * 2007-03-21 2009-06-24 浙江省舟山连岛工程建设指挥部 Tower column of stayed-cable bridge and its construction method
CN101122114A (en) * 2007-09-14 2008-02-13 中铁大桥局集团第五工程有限公司 Back-cable-free cable-stayed bridge steel tower vertical turn construction method
JP2010048060A (en) * 2008-08-25 2010-03-04 Shimizu Corp Construction method of structure
CN101476293B (en) * 2009-01-16 2010-10-27 广东省长大公路工程有限公司 Non-stand construction method for large bridge arch rib
KR101127923B1 (en) * 2009-07-01 2012-03-21 주식회사 포스코건설 Pylon of cable-stayed bridge having composite combination structure and construction method thereof
CN101649604B (en) * 2009-08-28 2011-04-13 中铁八局集团第一工程有限公司 Construction bracket of 1# block of inclined pull bridge and constructing method thereof
KR100962575B1 (en) * 2009-10-05 2010-06-11 (주)대우건설 Pendulum type vibration damping device for cable-stayed bridge of main tower
CN101781879B (en) * 2010-01-21 2011-09-07 中铁二十局集团有限公司 Construction method of single-pylon cable-stayed bridge without dorsal cables
CN201770940U (en) * 2010-07-30 2011-03-23 中铁四局集团第六工程有限公司 Mounting structure for lower load bearing plate of steel box tower with spatial variable cross section

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