CN103215894B - Portable interim prestressed stretch-draw anchor block - Google Patents

Portable interim prestressed stretch-draw anchor block Download PDF

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Publication number
CN103215894B
CN103215894B CN201310149624.5A CN201310149624A CN103215894B CN 103215894 B CN103215894 B CN 103215894B CN 201310149624 A CN201310149624 A CN 201310149624A CN 103215894 B CN103215894 B CN 103215894B
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China
Prior art keywords
anchor
anchor block
base plate
prefabricated subsection
case beam
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CN201310149624.5A
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CN103215894A (en
Inventor
高明昌
曹增华
杨少军
吴延伟
马有强
刘建萍
罗红枝
刘淑丽
沈晓峰
万更新
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China Railway First Survey and Design Institute Group Ltd
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China Railway First Survey and Design Institute Group Ltd
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Abstract

The present invention relates to a kind of portable interim prestressed stretch-draw anchor block.The interim prestressed stretch-draw of the conventional assembled bridge of precast segment adopts concrete anchor block, can not move and repeatedly reuse, and concrete anchor block weight is large, stressed unfavorable to precast segment spliced girder.Anchor block of the present invention is provided with base plate, base plate is fixed on prefabricated subsection case beam by pre-buried firmware, plate upper surface is uprightly welded with two pieces of relative anchor slabs, is welded with two pieces of floors perpendicular to anchor slab, anchor slab is provided with the anchor slab through hole wearing prestressed thick reinforcement between anchor slab; Prestressed thick reinforcement is located in four pieces of anchor slabs of two pieces anchor block on adjacent two joint prefabricated subsection case beams, and termination is anchored on the anchor slab of adjacent two pieces anchor block far-end by prestressed thick reinforcement tied silk.Simple structure of the present invention, rigidity is large, and cost is low, easy construction, and detachable moveable repeatedly reuses, and has good versatility.

Description

Portable interim prestressed stretch-draw anchor block
Technical field
the invention belongs to road traffic construction technique field, be specifically related to a kind of portable interim prestressed stretch-draw anchor block.
Background technology
The construction method of glueing joint the assembled bridge of seam precast segment is divided into some segment unit to carry out factorial praluction beam body along the longitudinal of bridge, be transported to bridge location piecemeal again, traversing carriage bridge fabrication machine or mobile extension basket carry out assembled, between each sections, assembled seam adopts epoxy sealing, by the compacted epoxy resin sealant of the interim prestressing force of stretch-draw between sections, then by the permanent prestressing force of stretch-draw, each prefabricated subsection is connected into as a whole, remove interim stretch-draw prestressing force, complete the construction of a sections or a hole beam, circulation like this, until full-bridge has been constructed.
At present, the interim prestressed stretch-draw of the conventional assembled bridge of precast segment adopts concrete anchor block, can not move and repeatedly reuse, and concrete anchor block weight is large, stressed unfavorable to precast segment spliced girder.In concrete anchor block, also need to bury underground ground tackle, spiral bar reserving hole channel, sequence of construction is complicated, and utilization rate of equipment and installations is low, and economy is not high, and not easily remove after bridge is shaping, aesthetic property is poor, is also unfavorable for environmental protection.
Summary of the invention
The object of this invention is to provide a kind of for the assembled bridge of precast segment, the interim prestressed stretch-draw anchor block of the reusable movable type of detachable moveable.
The technical solution adopted in the present invention is:
A kind of portable interim prestressed stretch-draw anchor block, is characterized in that:
Described anchor block is provided with base plate, base plate is fixed on prefabricated subsection case beam by pre-buried firmware, plate upper surface is uprightly welded with two pieces of relative anchor slabs, is welded with two pieces of floors perpendicular to anchor slab, anchor slab is provided with the anchor slab through hole wearing prestressed thick reinforcement between anchor slab.
Described pre-buried firmware comprises pre-buried leveling steel plate, the pre-embedded bolt of U-shaped and bolt nut;
Pre-buried leveling steel plate is preset in the prefabricated subsection case beam below base plate, base plate and pre-buried leveling steel plate are provided with bolt duct corresponding to position, be preset in pre-embedded bolt in the prefabricated subsection case beam bolt duct through both, and the bolt nut above base plate fixes.
Described floor and base plate are welded and fixed.
Described prestressed thick reinforcement is located in four pieces of anchor slabs of two pieces anchor block on adjacent two joint prefabricated subsection case beams, and the termination of prestressed thick reinforcement is anchored on the anchor slab of adjacent two pieces anchor block far-end by prestressed thick reinforcement tied silk.
The present invention has the following advantages:
The anchor block simple structure that the present invention adopts, rigidity are large, and detachable moveable repeatedly reuses, easy construction, and economy is higher; versatility is good, saves prestressed anchor backing plate and spiral bar, and prestressing force is anchoring on anchor block anchor slab directly; steel using amount is economized, and is more conducive to environmental protection, investment reduction.
Accompanying drawing explanation
Fig. 1 is the cross sectional arrangement figure of anchor block in the anchoring of prefabricated subsection box girder tensioning.
Fig. 2 is the side arrangement figure of anchor block in the anchoring of prefabricated subsection box girder tensioning.
Fig. 3 is anchor block elevation (II-II sectional view).
Fig. 4 is anchor block lateral view (I-I sectional view).
In figure, 1-floor, 2-bolt nut, 3-base plate, the pre-buried leveling steel plate of 4-, 5-pre-embedded bolt, 6-prefabricated subsection case beam, 7-anchor slab, 8-prestressed thick reinforcement tied silk anchor, 9-prestressed thick reinforcement.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be described in detail.
The portable interim prestressed stretch-draw anchor block of one involved in the present invention, be provided with base plate 3, base plate 3 is fixed on prefabricated subsection case beam 6 by pre-buried firmware.Pre-buried firmware comprises pre-buried leveling steel plate 4, the pre-embedded bolt 5 of U-shaped and bolt nut 2, pre-buried leveling steel plate 4 is preset in the prefabricated subsection case beam 6 below base plate 3, base plate 3 and pre-buried leveling steel plate 4 are provided with bolt duct corresponding to position, be preset in the bolt duct of pre-embedded bolt in prefabricated subsection case beam 65 through both, and the bolt nut 2 above base plate 3 fixes.Pre-embedded bolt 5 can arrange many groups, as shown in Figure 2 four groups, the fixed effect of strengthening anchor block on prefabricated subsection case beam 6.
Base plate 3 upper surface is uprightly welded with two pieces of relative anchor slabs 7, is welded with two pieces of floors 1 perpendicular to anchor slab 7 between anchor slab 7, and floor 1 also can be welded and fixed with base plate 3, to strengthen the rigidity of anchor block.Anchor slab 7 is provided with the anchor slab through hole wearing prestressed thick reinforcement 9, and interlaced arrangement, both sides all can the interim prestressing force of stretch-draw, both can be used as stretching end anchor block, and also can be used as fixed end anchor block.As the anchor slab through hole of four in Fig. 3 the rhombus arrangement that adopts.Article two, prestressed thick reinforcement 9 is located in four pieces of anchor slabs 7 of two pieces anchor block on adjacent two joint prefabricated subsection case beams 6, and the termination of prestressed thick reinforcement 9 is fixed on the anchor slab 7 of adjacent two pieces anchor block far-end by prestressed thick reinforcement tied silk anchor 8.As a, b, c tri-saves prefabricated subsection case beam, if a, b two one group of prestressed thick reinforcement 9 saved between prefabricated subsection case beam is vertical direction layout, so b, c two saves the one group of prestressed thick reinforcement 9 between prefabricated subsection case beam 6 is that horizontal direction is arranged.
The construction sequence of movable type involved in the present invention interim prestressed stretch-draw anchor block is as described below:
1, presetting preburied bolt 5 and pre-buried leveling steel plate 6 when box girder segment is prefabricated.
2, on the ready base plate 3 of blanking and anchor slab 7, press design attitude perforate, and base plate 3, floor 1, anchor slab 7 soldering group are combined into an overall anchor block.
3, steel is combined anchor block be arranged on by pre-embedded bolt 5 and bolt nut 2 need stretch-draw prestressing force prefabricated subsection case back plate and base plate on.
4, prefabricated subsection case beam is pre-splicing installs to position, completes after joint face epoxy resin smears, wearing prestressed thick reinforcement 9, being stretched to prestressed thick reinforcement to designing stretching force, prestressed thick reinforcement tied silk anchor 8.
5, whole hole beam is assembled complete after, after the permanent prestressing force of stretch-draw, remove overall anchor block, circulate according to step 2 until, all segment installations complete.
Be fixed on by pre-buried firmware on prefabricated subsection case beam by mobile anchor block when the interim prestressing force of stretch-draw, dismounting after stretch-draw completes also moves to the next one and needs the interim prestressed sections position of stretch-draw.
Content of the present invention is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading manual of the present invention to any equivalence that technical solution of the present invention is taked, is claim of the present invention and contains.

Claims (1)

1. portable interim prestressed stretch-draw anchor block, is characterized in that:
Described anchor block is provided with base plate (3), base plate (3) is fixed on prefabricated subsection case beam (6) by pre-buried firmware, base plate (3) upper surface is uprightly welded with two pieces of relative anchor slabs (7), be welded with two pieces of floors (1) perpendicular to anchor slab (7) between anchor slab (7), anchor slab (7) be provided with the anchor slab through hole wearing prestressed thick reinforcement (9);
Described pre-buried firmware comprises pre-buried leveling steel plate (4), the pre-embedded bolt (5) of U-shaped and bolt nut (2);
Pre-buried leveling steel plate (4) is preset in the prefabricated subsection case beam (6) of base plate (3) below, base plate (3) and pre-buried leveling steel plate (4) are provided with bolt duct corresponding to position, be preset in pre-embedded bolt (5) in prefabricated subsection case beam (6) the bolt duct through both, and the bolt nut (2) of base plate (3) top fixes;
Described floor (1) and base plate (3) are welded and fixed;
Described anchor block is provided with four on single-unit prefabricated subsection case beam (6), and wherein two are positioned at the position of the corresponding web of prefabricated subsection case beam (6) top board, lateral symmetry, and two other is positioned at prefabricated subsection case beam (6) base plate, lateral symmetry;
Be provided with two between the corresponding anchor block of adjacent two joints prefabricated subsection case beam (6) vertically or the prestressed thick reinforcement (9) of horizontal arrangement, the termination of prestressed thick reinforcement (9) is fixed on the anchor slab (7) of corresponding anchor block far-end by prestressed thick reinforcement tied silk anchor (8);
One joint prefabricated subsection case beam (6) be positioned at two prestressed thick reinforcements (9) arranged between the corresponding anchor block of the prefabricated subsection case beam (6) of its side and vertically arrange, then this joint prefabricated subsection case beam (6) be positioned at two prestressed thick reinforcement (9) horizontal arrangement arranged between the corresponding anchor block of the prefabricated subsection case beam (6) of its opposite side;
The termination of the prestressed thick reinforcement (9) of vertical layout is positioned between floor (1), and the termination of the prestressed thick reinforcement (9) of horizontal arrangement is positioned at outside floor (1) two.
CN201310149624.5A 2013-04-26 2013-04-26 Portable interim prestressed stretch-draw anchor block Active CN103215894B (en)

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Application Number Priority Date Filing Date Title
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CN103215894B true CN103215894B (en) 2015-10-28

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110100A (en) * 2013-12-02 2014-10-22 成都绿迪科技有限公司 Steel bar clip pre-stress tensioning anchor block
CN105735134B (en) * 2016-03-17 2017-05-17 中交第二航务工程局有限公司 Temporary tensioning method for stub matching prefabricated box girders
CN110700103B (en) * 2019-10-16 2022-04-08 中铁工程服务有限公司 Construction method of continuous composite beam
CN111155449A (en) * 2020-01-10 2020-05-15 东南大学 Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method
CN111335136B (en) * 2020-03-23 2022-03-25 中国建筑土木建设有限公司 External prestress structure of segment box girder and construction method thereof
CN113789811B (en) * 2021-09-16 2022-04-26 北京科技大学 Temporary fastening connection system for prefabricated large components

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CN101215822A (en) * 2008-01-08 2008-07-09 中交第二公路勘察设计研究院有限公司 Method and device for anchoring changeable prestressing force of suspension bridge
CN201187039Y (en) * 2008-04-25 2009-01-28 中交第二航务工程局有限公司 Self-balance loading temporary anchoring device between main beam and platform
CN101705660A (en) * 2009-11-10 2010-05-12 中铁三局集团有限公司 Reaction frame prestress anchoring system and method for vertical rotating steel pipe arch on concrete bridge
CN102392415A (en) * 2011-10-26 2012-03-28 柳州欧维姆机械股份有限公司 Vertical prestressed anchorage system and construction method thereof
CN203213022U (en) * 2013-04-26 2013-09-25 中铁第一勘察设计院集团有限公司 Mobile temporary prestress tensioning anchor block

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JP4391011B2 (en) * 2000-12-28 2009-12-24 大成建設株式会社 Fixing jig for construction steel material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101215822A (en) * 2008-01-08 2008-07-09 中交第二公路勘察设计研究院有限公司 Method and device for anchoring changeable prestressing force of suspension bridge
CN201187039Y (en) * 2008-04-25 2009-01-28 中交第二航务工程局有限公司 Self-balance loading temporary anchoring device between main beam and platform
CN101705660A (en) * 2009-11-10 2010-05-12 中铁三局集团有限公司 Reaction frame prestress anchoring system and method for vertical rotating steel pipe arch on concrete bridge
CN102392415A (en) * 2011-10-26 2012-03-28 柳州欧维姆机械股份有限公司 Vertical prestressed anchorage system and construction method thereof
CN203213022U (en) * 2013-04-26 2013-09-25 中铁第一勘察设计院集团有限公司 Mobile temporary prestress tensioning anchor block

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