CN104480858A - Construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs - Google Patents

Construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs Download PDF

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Publication number
CN104480858A
CN104480858A CN201410555783.XA CN201410555783A CN104480858A CN 104480858 A CN104480858 A CN 104480858A CN 201410555783 A CN201410555783 A CN 201410555783A CN 104480858 A CN104480858 A CN 104480858A
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CN
China
Prior art keywords
girder
concrete
construction
sealing
anchored
Prior art date
Application number
CN201410555783.XA
Other languages
Chinese (zh)
Inventor
刘波
任慧军
杨利民
孙志凌
彭建锋
邓琳
冯艳玲
黎平
于远建
吴先凤
肖攀
赵阳
Original Assignee
中建三局第二建设工程有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 中建三局第二建设工程有限责任公司 filed Critical 中建三局第二建设工程有限责任公司
Priority to CN201410555783.XA priority Critical patent/CN104480858A/en
Publication of CN104480858A publication Critical patent/CN104480858A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/28Concrete reinforced prestressed

Abstract

The invention relates to a construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs; an anchorage sealing system of pre-stress concrete box girder and cross girder anchored troughs mainly consists of lateral die plates, pull rods and discharge ducts; the construction method is implemented according to the following steps: before casting concrete of a box girder, embedding the pull rods in lateral sides of the girder ends, embedding a discharge duct in the top portion of an edge web plate anchored trough, and using the embedded pull rods to fix anchored trough lateral die plates; using the embedded discharge duct to vertically cast concrete of the girder end lateral anchored troughs from the top of the girder. By embedding the discharge duct and oppositely pulling threaded rods, the operability of the girder end anchorage sealing construction is better, thus effectively increasing the concrete casting quality of anchorage sealing of the anchored troughs. The construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs can increase the construction quality of the anchorage sealing concrete, and can also save the concrete; and the operation process is simple, safe and reliable.

Description

A kind of construction method of prestressed concrete box girder crossbeam anchor groove sealing off and covering anchorage

Technical field

The invention belongs to municipal engineering field, relate generally to the construction method of prestressed concrete box girder crossbeam anchor groove sealing off and covering anchorage.

Background technology

Crossbeam anchor groove sealing off and covering anchorage quality is a difficult problem in the urgent need to address in construction always.Conventional method is that first formwork supporting plate adopts chute from tapping outside template to concrete perfusion in anchor groove again, and the method is easy to greatly cause groove inner concrete leakiness due to operation easier of vibrating, and the quality problems such as honeycomb, pitted skin appear in concrete surface.Unit in charge of construction constantly improves construction technology, summing up experience for this reason, such as adopt in construction small-sized vibrating spear, in shake and combine the outer measure such as to shake, but actual effect is often difficult to satisfactory.

Summary of the invention

Object of the present invention is in order to solve the concreting of crossbeam anchor groove sealing off and covering anchorage, difficulty of vibrating, easily there is the common quality defects such as honeycomb, pitted skin, leakiness, and a kind of construction method of prestressed concrete box girder crossbeam anchor groove sealing off and covering anchorage is provided, the present invention is by pre-buried tremie pipe and Screw arbor with nut at both-ends, make beam-ends sealing off and covering anchorage application operability stronger, effectively improve anchor groove sealing off and covering anchorage concrete pouring quality.The present invention both can improve the concrete construction quality of sealing off and covering anchorage, can save concrete again, and operating process is simple, safe and reliable.

The scheme that the technical problem that the present invention solves adopts is:

A kind of construction method of prestressed concrete box girder crossbeam anchor groove sealing off and covering anchorage, prestress box beam crossbeam anchor groove sealing off and covering anchorage system is primarily of side template, pull bar, tremie pipe composition, it is characterized in that carrying out according to the following steps: before box girder webs concrete, at the pre-buried pull bar in beam-ends side, at the pre-buried tremie pipe in web anchor groove top, limit, utilize the side template of pre-buried pull bar mooring anchor groove; Utilize pre-buried tremie pipe, at back vertical casting beams end side surface anchor groove concrete.

Described side template adopts BWPC bamboo to mould plate, and it is multiple elements design plate that BWPC bamboo moulds plate.

Described tremie pipe is metal bellows.

The pull bar mooring anchor groove BWPC bamboo that the present invention utilizes beam body pre-buried moulds plate side template, pea gravel concreten is adopted to build anchor groove side concrete by the vertical blanking of built-in metal bellows, adopt small-sized vibrating spear to be vibrated from tremie pipe simultaneously, reach the effect of concrete compaction.The present invention both can improve the concrete construction quality of sealing off and covering anchorage, can save concrete again, and operating process is simple, safe and reliable.

Accompanying drawing explanation

Fig. 1 is construction schematic diagram of the present invention.

Fig. 2 is tremie pipe layout schematic diagram of the present invention.

Detailed description of the invention

The present invention will be described in detail by reference to the accompanying drawings:

1, anchor groove sealing off and covering anchorage design

As shown in Figure 1, anchor groove sealing off and covering anchorage designs: directly over anchor groove, pre-buried diameter is that 100mm metal bellows 1 is as filling concrete hole, metal bellows 1 is laterally put by spacing 50cm along crossbeam, as shown in Figure 2, checks that whether fill orifice is unobstructed after beam-ends concreting; After anchor head sealing off and covering anchorage and reinforced mesh 6 have been constructed, vertical side template 2, the pre-buried pull bar 5 of fixed form, pull bar 5 adopts diameter Ф 12 full pull bars to join double nut, and vertical horizontal spacing is respectively 20cm, 40cm; Cross bar 4 adopts two Ф 48 × 3 steel pipe, longitudinal pitch 20cm; Side template adopts 8mmBWPC bamboo to mould plate, and periphery double sided foam glue sealing, prevents because spillage causes voids and pits phenomenon.Sealing off and covering anchorage concrete adopts C50 microdilatancy pea gravel concreten 3, the slump 180 ~ 220mm.

2, C50 slightly expanded concrete is built

Adopt hand-push trolley that C50 microdilatancy pea gravel concreten is transported to beam-ends anchor groove preformed hole place, the instrument such as spade and vibrating spear is utilized to be poured into by concrete in anchor groove, insert concrete with 30 type vibrating spears from built-in pipe, continue about 10s, build thickness for every layer and be no more than 30cm, the extravasating hole arranged by side checks whether anchor groove concrete has built full, and finally concrete is filled up built-in pipe, concrete surface slightly exceeds beam face 1 ~ 2cm.

3, form removal, maintenance

I.e. collapsible die after 48 hours, in the winter time or summer, notes after form removal carrying out concrete insulation or moisturizing work.

4, inspect for acceptance

After form removal concrete whether closely knit, have no color differnece, whether flat smooth checks on surface.

Claims (3)

1. the construction method of a prestressed concrete box girder crossbeam anchor groove sealing off and covering anchorage, prestress box beam crossbeam anchor groove sealing off and covering anchorage system is primarily of side template, pull bar, tremie pipe composition, it is characterized in that carrying out according to the following steps: before box girder webs concrete, at the pre-buried pull bar in beam-ends side, at the pre-buried tremie pipe in web anchor groove top, limit, utilize the side template of pre-buried pull bar mooring anchor groove; Utilize pre-buried tremie pipe, at back vertical casting beams end side surface anchor groove concrete.
2. the construction method of described prestressed concrete box girder crossbeam anchor groove sealing off and covering anchorage according to claim 1, is characterized in that: described side template adopts BWPC bamboo to mould plate.
3. the construction method of described prestressed concrete box girder crossbeam anchor groove sealing off and covering anchorage according to claim 1, is characterized in that: described tremie pipe is metal bellows.
CN201410555783.XA 2014-10-20 2014-10-20 Construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs CN104480858A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410555783.XA CN104480858A (en) 2014-10-20 2014-10-20 Construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410555783.XA CN104480858A (en) 2014-10-20 2014-10-20 Construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs

Publications (1)

Publication Number Publication Date
CN104480858A true CN104480858A (en) 2015-04-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107237263A (en) * 2017-06-15 2017-10-10 中交航局第工程有限公司 Mining under railways sealing off and covering anchorage skin hammers method of vibrating into shape
CN108505444A (en) * 2018-04-03 2018-09-07 中交路桥华东工程有限公司 A kind of T beams pier top continuous segment hogging moment tooth block sealing end mold

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799279A (en) * 1985-12-02 1989-01-24 Figg And Muller Engineers, Inc. Method of constructing the approach and main spans of a cable stayed segmental bridge
JP2002004224A (en) * 2000-06-08 2002-01-09 Min Se Koo Construction method of single span and multi span composite girder bridge
CN101745981A (en) * 2010-01-26 2010-06-23 王丹 Anchor sealing method of prestressed anchor recess
CN101838998A (en) * 2010-04-27 2010-09-22 中国科学院武汉岩土力学研究所 Prestressed anchor cable pile sliding wall along river road shoulder and construction method thereof
US8387941B2 (en) * 2008-08-06 2013-03-05 China Major Bridge Engineering Co., Ltd. Upper-bearing movable formwork for constructing continuous box girder for bridge superstructure
CN202766970U (en) * 2012-09-12 2013-03-06 中国建筑土木建设有限公司路桥分公司 Cast-in-place outer vertical face seamless seal anchor structure
CN103174095A (en) * 2013-03-18 2013-06-26 中国建筑第八工程局有限公司 Box girder concrete pouring structure with rear-expanding flanges and construction method thereof
CN203867179U (en) * 2014-05-20 2014-10-08 北京建工国际建设工程有限责任公司 Template assembly at joint of transverse component and longitudinal component

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* Cited by examiner, † Cited by third party
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US4799279A (en) * 1985-12-02 1989-01-24 Figg And Muller Engineers, Inc. Method of constructing the approach and main spans of a cable stayed segmental bridge
JP2002004224A (en) * 2000-06-08 2002-01-09 Min Se Koo Construction method of single span and multi span composite girder bridge
US8387941B2 (en) * 2008-08-06 2013-03-05 China Major Bridge Engineering Co., Ltd. Upper-bearing movable formwork for constructing continuous box girder for bridge superstructure
CN101745981A (en) * 2010-01-26 2010-06-23 王丹 Anchor sealing method of prestressed anchor recess
CN101838998A (en) * 2010-04-27 2010-09-22 中国科学院武汉岩土力学研究所 Prestressed anchor cable pile sliding wall along river road shoulder and construction method thereof
CN202766970U (en) * 2012-09-12 2013-03-06 中国建筑土木建设有限公司路桥分公司 Cast-in-place outer vertical face seamless seal anchor structure
CN103174095A (en) * 2013-03-18 2013-06-26 中国建筑第八工程局有限公司 Box girder concrete pouring structure with rear-expanding flanges and construction method thereof
CN203867179U (en) * 2014-05-20 2014-10-08 北京建工国际建设工程有限责任公司 Template assembly at joint of transverse component and longitudinal component

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杜鸣川: "新型节能材料的应用使模板技术获得新突破 用BWPC板实现的弧形桥梁模架系统", 《中国建材报》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107237263A (en) * 2017-06-15 2017-10-10 中交航局第工程有限公司 Mining under railways sealing off and covering anchorage skin hammers method of vibrating into shape
CN107237263B (en) * 2017-06-15 2019-04-16 中交一航局第一工程有限公司 Mining under railways sealing off and covering anchorage skin hammers method of vibrating into shape
CN108505444A (en) * 2018-04-03 2018-09-07 中交路桥华东工程有限公司 A kind of T beams pier top continuous segment hogging moment tooth block sealing end mold
CN108505444B (en) * 2018-04-03 2019-09-24 中交路桥华东工程有限公司 A kind of T beam pier top continuous segment hogging moment tooth block sealing end mold

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Application publication date: 20150401

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