CN102373713A - Construction method and device for preserved hole of equipment foundation bolt - Google Patents

Construction method and device for preserved hole of equipment foundation bolt Download PDF

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Publication number
CN102373713A
CN102373713A CN2011103722400A CN201110372240A CN102373713A CN 102373713 A CN102373713 A CN 102373713A CN 2011103722400 A CN2011103722400 A CN 2011103722400A CN 201110372240 A CN201110372240 A CN 201110372240A CN 102373713 A CN102373713 A CN 102373713A
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prismatoid
rib
length
base plate
steel
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CN2011103722400A
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CN102373713B (en
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刘涛
范开平
王来所
刘六艺
周川明
杨立峰
王晓莉
黎晓开
陈香荣
钱海英
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Sinohydro Bureau 14 Co Ltd
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Sinohydro Bureau 14 Co Ltd
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Abstract

The invention discloses a construction method and device for a preserved hole of an equipment foundation bolt. A construction hole forming device for the preserved hole is designed and manufactured and is a prismatoid shaping steel mould comprising side plates, longitudinal and transverse ribs, a base plate, a nut cap and a fixed frame, wherein the side plates are of an isosceles trapezoid shape; the longitudinal and transverse ribs are respectively welded at the inner sides and the outer sides of the side plates; four side plates are welded to form a prismatoid square port tube; the base plate is square; the outer longitudinal and transverse ribs are welded to be square; the inner longitudinal and transverse ribs are welded to be crossed; the base plate is welded with a large port end of the prismatoid; and the nut cap is welded at the small port end of the prismatoid. The prismatoid shaping steel mould is mounted and positioned; after the prismatoid shaping steel mould is accurately positioned, the steel mould is fixed by using an angle steel or steel bar welded #-shaped frame; a fixed cross bar is arranged on the #-shaped frame and is welded with the outer transverse ribs of the steel mould side plates; and a group of steel mould #-shaped frame is connected integrally. In the process of forming the preserved hole and treating the formed preserved hole, the preserved hole is formed by casting foundation concrete and a vibrating tamper is required to be in no contact with the shaping steel mould and the #-shaped frame; and the nut cap is cut off before the foundation bolt is mounted. After the preserved hole is formed, the template is not needed to be dismantled, hacking on the inner wall is avoided and favorable combined anchoring performance between concrete and the template is achieved.

Description

A kind of foundation bolt preformed hole of equipment foundation job practices and device
One, technical field
The invention belongs to thermoelectricity civil works technical field, be specifically related to a kind of thermal power plant foundation bolt preformed hole of equipment foundation job practices and device.
Two, background technology
In thermal power plant's engineering construction; Often run into the steel concrete large equipment base and need stay the preformed hole construction of establishing the erection equipment stone bolt; Preformed hole is generally prismatoid, and (osculum) suitable for reading is of a size of 18-20 centimetre, end opening (big mouthful) to be of a size of 28-30 centimetre, the degree of depth be 150-200 centimetre.For a long time, in the Equipment Foundations construction, adopt wooden model to install preformed hole, along with the development of society, this traditional prepared screw-bolt hole job practices can not adapt to the needs of thermal power project large equipment base construction always.Often occur the preformed hole wooden model in the construction by concrete crimp or imbibition distortion, and extract untimely after the concreting and situation that can not tear wooden model open, can only use pneumatic pick, electric drill at last, slowly draw out then the wooden model fragmentation.The anchor bolt box that Zhi Mumo is shaped also need be cut a hole hair to the preformed hole inwall after the form removal.Especially the darker prismatoid preformed hole of some degree of depth, form removal is bigger with cutter Maonans degree, and spended time is also longer.Also have a kind of anchor bolt box hole forming method, adopt reinforced concrete prefabricated board (thickness of slab 3cm) to replace wooden model exactly, this method needs first prefabricated reinforced concrete template; And prefabricated reinforced concrete template operation is many; Construction cost is high, and the installing and locating inconvenient operation, and construction speed is slow.
In recent years, some units in charge of construction had quoted advanced foreign technology, i.e. ripple bolt rotation set pipe is produced in mechanization; Be applied to reserve anchor (bolt) hole; Because the specification of the preformed hole of each engineering is many, and the quantity of the preformed hole of every kind of specification is few, thereby not can manufacture; Cause construction cost high, can't apply.
Three, summary of the invention
1. the purpose of inventing: the weak point that overcomes existing anchor bolt box job practices; A kind of easy to operate, construction cost is low, pore-forming is effective anchor bolt box job practices is provided; This job practices can reduce working procedure; Accelerating construction progress reduces construction cost, and reliable construction quality.
2. the technical scheme of inventing: (1) manufactures and designs steel prismatoid typified form and realizes not stripping of anchor bolt box moulding; (2) prismatoid set shaped steel formwork installing and locating; (3) processing behind preformed hole pore-forming and the pore-forming.Specific practice is: (1) has manufactured and designed the prismatoid typified form of a steel; Realize the anchor bolt box moulding, accompanying drawings: steel prismatoid typified form comprises side plate (3), side plate outside rib (4), side plate inboard side rib (8), prismatoid stock mould block (9), fixed transverse rod (10), well word fixed mount (2) in rib (5), base plate (6), plate outer side rib (7), the base plate in length and breadth in length and breadth; According to the size of preformed hole, the side plate of blanking processing prismatoid typing punching block, rib, base plate, block in length and breadth; It is characterized in that: the side plate of each prismatoid set shaped steel formwork is 4, the shape isosceles trapezoid, and last edge lengths 18-20 centimetre, following edge lengths 28-30 centimetre, highly be 150-200 centimetre, side plate is higher 10 centimetres than preformed hole, and foot bolt cuts off block before installing easily; 8 in the vertical outward rib of side plate, length 150-200 centimetre; Vertical rib is 24 in the side plate, and length 25-30 centimetre, cross rib is 56 in the side plate, length 8-12 centimetre; Base plate outward in length and breadth rib each 2,25 centimetres of length; In the base plate in length and breadth rib each 2,15 centimetres of length; Base plate is a square, length of side 28-30 centimetre.The operation of making ladder type body-shaping punching block is: it is the II grade reinforcing steel making of 25mm that prismatoid typified form well word fixed mount adopts ∠ 50 * 5 angle steel or diameter; Side plate, base plate, block adopt the thick steel plate of 6mm to make, inside and outside side plate and the base plate in length and breadth rib to adopt diameter be that the II grade reinforcing steel of 12mm is processed; 2 in the vertical outward rib of every side plate one face down bonding vertically in 6 of the outer cross ribs, another face down bonding helps 6, in horizontally help 14; The interior outside of 4 blocks of side plates is welded into prismatoid square opening pipe with side plate after rib welds in length and breadth; Base plate outward in length and breadth rib weldering be hollow, the interior weldering of rib in length and breadth is for cross, base plate welds with prismatoid steel pipe big opening end after rib welds in length and breadth; At prismatoid steel pipe osculum end welding block.(2) installing and locating of prismatoid typing punching block: before the installation, mark cross centre line at block, the plate outer side of typing punching block, so that carry out installing and locating.After the accurate positioning of prismatoid typing punching block; Adopt angle steel or reinforcing bar welding well cabinet frame fixation prismatoid typing punching block, each prismatoid punching block is provided with a fixedly well cabinet frame, well cabinet frame upper and lower opening equal and opposite in direction; Be square; Fixed ladder body steel form for ease, on the well cabinet frame with the prismatoid steel mould side board outside cross rib level position fixed transverse rod is set, the outer cross rib welding of fixed transverse rod and prismatoid steel mould side board.For guaranteeing the globality of same group of prismatoid punching block, fuse single well cabinet frame usually.(3) processing behind preformed hole pore-forming and the pore-forming: build the Equipment Foundations concrete and make the preformed hole moulding; In the concreting process, the attention vibrator is not run into prismatoid typing punching block and well cabinet frame, after the Equipment Foundations concreting; Concrete and steel prismatoid typified form are become one; Stripping not behind the preformed hole pore-forming, stone bolt is installed before, cut off the block of prismatoid typing punching block.
3. the good effect of inventing: the technical scheme of being invented is adopted in (1), and dark type prismatoid preformed hole template does not need to remove, and the preformed hole inwall need not cut a hole hair, has reduced working procedure, has accelerated construction speed, has reduced construction cost.(2) after the concreting of Equipment Foundations finishes, the anchor bolt box of Equipment Foundations carried out measuring checked, all in the deviation range that standard allows, the feature dimension of all preformed holes all adheres to specification the preformed hole axis shift.(3) adopt foundation bolt preformed hole of equipment foundation (the dark type prismatoid) hole quality of this method construction good, not yielding, displacement, cleaning in the hole.Concrete combines anchoring property good with casement.
Four, description of drawings
Fig. 1 is the foundation bolt preformed hole of equipment foundation construction plan; Fig. 2 is a foundation bolt preformed hole of equipment foundation typified form expanded view; Fig. 3 is foundation bolt preformed hole of equipment foundation stock mould block drawing, and Fig. 4 is a foundation bolt preformed hole of equipment foundation stock mould base plate drawing.1 is base concrete, and 2 is well word fixed mount, and 3 is side plate, and 4 is side plate outside rib in length and breadth, and 5 is side plate inboard rib in length and breadth, and 6 is base plate, and 7 is the plate outer side rib, and 8 is side rib in the base plate, and 9 are prismatoid stock mould block, and 10 is fixed transverse rod.
Five, the specific embodiment
1, manufactured and designed the prismatoid typified form of steel; Realize the anchor bolt box moulding, accompanying drawings: steel prismatoid typified form comprises side plate (3), side plate outside rib (4), side plate inboard side rib (8), prismatoid stock mould block (9), fixed transverse rod (10), well word fixed mount (2) in rib (5), base plate (6), plate outer side rib (7), the base plate in length and breadth in length and breadth; According to the size of preformed hole, the side plate of blanking processing prismatoid typing punching block, rib, base plate, block in length and breadth; It is characterized in that: the side plate of each prismatoid typing punching block is 4, shape isosceles trapezoid, last edge lengths 18-20 centimetre, following edge lengths 28-30 centimetre; Highly be 150-200 centimetre, higher 10 centimetres than preformed hole, so that stone bolt cuts off block before installing; 8 in the vertical outward rib of side plate, length 150-200 centimetre, vertical rib is 24 in the side plate; Length 25-30 centimetre, cross rib is 56 in the side plate, length 8-12 centimetre; Base plate outward in length and breadth rib each 2,25 centimetres of length; In the base plate in length and breadth rib each 2,15 centimetres of length; Base plate is a square, length of side 28-30 centimetre.The operation that is made as ladder type body-shaping steel form is: 1. prismatoid typified form well word fixed mount employing ∠ 50 * 5 angle steel or diameter are the II grade reinforcing steel making of 25mm; Side plate, base plate, block adopt the thick steel plate of 6mm to make, inside and outside side plate and the base plate in length and breadth rib to adopt diameter be that the II grade reinforcing steel of 12mm is processed; 2 in the vertical outward rib of every side plate one face down bonding, vertical rib is 6 in 6 of the outer cross ribs, another face down bonding, in horizontally help 14; The interior outside of 4 blocks of side plates is welded into prismatoid square opening pipe with side plate after rib welds in length and breadth; Base plate outward in length and breadth rib weldering be hollow, the interior weldering of rib in length and breadth is for cross, base plate welds with prismatoid steel pipe big opening end after rib welds in length and breadth; At prismatoid steel pipe osculum end welding block; 2. the installing and locating of prismatoid typing punching block: before the installation, mark cross centre line at block, the plate outer side of typing punching block, so that carry out installing and locating; After the accurate positioning of prismatoid typing punching block; Adopting ∠ 50 * 5 angle steel or diameter is the II grade reinforcing steel welding well cabinet frame fixation prismatoid typing punching block of 25mm, and each prismatoid punching block is provided with a fixedly well cabinet frame, well cabinet frame upper and lower opening equal and opposite in direction; Be square; Fixed ladder body steel form for ease, on the well cabinet frame with the prismatoid steel mould side board outside cross rib level position fixed transverse rod is set, the outer cross rib welding of fixed transverse rod and prismatoid steel mould side board.In order to guarantee the globality of same group of prismatoid punching block, fuse single well cabinet frame usually.3. the processing behind preformed hole pore-forming and the pore-forming: build the Equipment Foundations concrete and make the preformed hole moulding; In the concreting process, the attention vibrator is not run into prismatoid typing punching block and well cabinet frame, after the Equipment Foundations concreting; Concrete and steel prismatoid typified form are become one; Stripping not behind the preformed hole pore-forming, stone bolt is installed before, cut off the block of prismatoid typing punching block.
Adopt the technical scheme of being invented; The preformed hole inwall need not cut a hole hair, has reduced working procedure, and the preformed hole axis shift is all in standard allowable variation scope; The preformed hole feature dimension all adheres to specification; The preformed hole hole quality is good, not yielding, displacement, and concrete combines anchoring property good with casement.

Claims (1)

1. a foundation bolt preformed hole of equipment foundation job practices comprises manufacturing and designing steel prismatoid typified form, prismatoid typified form installing and locating, and preformed hole pore-forming and pore-forming postprocessing working procedures is characterized in that:
1.1 make the prismatoid typified form; The prismatoid typified form; By side plate (3), the side plate outside in length and breadth rib (4), side plate inboard in length and breadth in rib (5), base plate (6), plate outer side rib (7), the base plate side rib (8), block (9), fixed transverse rod (10), well word fixed mount (2) form; According to the preformed hole size, decision side plate, rib, base plate, block size in length and breadth; (1) composition of prismatoid typified form and size, the side plate of each prismatoid typing punching block is 4, the shape isosceles trapezoid; Last edge lengths 18-20 centimetre, following edge lengths 28-30 centimetre, 150-200 centimetre of height; Higher 10 centimetres than preformed hole, so that stone bolt cuts off block before installing; 8 in the vertical outward rib of side plate, length 150-200 centimetre; Vertical rib is 24 in the side plate, and length 25-30 centimetre, cross rib is 56 in the side plate, length 8-12 centimetre; Base plate outward in length and breadth rib each 2,25 centimetres of length; In the base plate in length and breadth rib each 2,15 centimetres of length; Base plate is a square, length of side 28-30 centimetre; (2) operation of making prismatoid typified form is: it is the II grade reinforcing steel making of 25mm that prismatoid typified form well word fixed mount adopts ∠ 50 * 5 angle steel or diameter; Side plate, base plate, block adopt the thick steel plate of 6mm to make, inside and outside side plate and the base plate in length and breadth rib to adopt diameter be that the II grade reinforcing steel of 12mm is processed; 2 in the vertical outward rib of every side plate one face down bonding vertically in 6 of the outer cross ribs, another face down bonding helps 6, in horizontally help 14; The interior outside of 4 blocks of side plates is welded into prismatoid square opening pipe with side plate after rib welds in length and breadth; Base plate outward in length and breadth rib weldering be hollow, the interior weldering of rib in length and breadth is for cross, base plate welds with prismatoid steel pipe big opening end after rib welds in length and breadth; At prismatoid steel pipe osculum end welding block;
1.2 the installing and locating of prismatoid typing punching block: after the prismatoid typified form is made, be transported to the job site and install, before the installation; Block, plate outer side at the typing punching block mark cross centre line, so that carry out installing and locating, after the accurate positioning of prismatoid typing punching block; Adopting ∠ 50 * 5 angle steel or diameter is the II grade reinforcing steel welding well cabinet frame fixation prismatoid typing punching block of 25mm, and each prismatoid punching block is provided with a fixedly well cabinet frame, well cabinet frame upper and lower opening equal and opposite in direction; Be square; Fixed ladder body steel form for ease, on the well cabinet frame with the prismatoid steel mould side board outside cross rib level position fixed transverse rod is set, the outer cross rib welding of fixed transverse rod and prismatoid steel mould side board; In order to guarantee the globality of same group of prismatoid punching block, fuse single well cabinet frame;
1.3 the processing behind preformed hole pore-forming and the pore-forming: build the Equipment Foundations concrete and make the preformed hole moulding, in the concreting process, the attention vibrator is not run into prismatoid typing punching block and well cabinet frame; After building, concrete and steel prismatoid typified form are become one, stripping not behind the preformed hole pore-forming; Before stone bolt is installed, cut off the block of prismatoid typing punching block; The preformed hole inwall need not cut a hole hair, and feature dimension adheres to specification, and hole quality is good, not yielding, displacement, and the preformed hole axis shift is in standard allowable variation scope, and concrete combines anchoring property good with casement.
CN2011103722400A 2011-11-22 2011-11-22 Construction method and device for preserved hole of equipment foundation bolt Active CN102373713B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102660960A (en) * 2012-05-18 2012-09-12 中国水利水电第十四工程局有限公司 Detachment-free foundation bolt hole device of stator foundation and grouting method
CN102912813A (en) * 2012-11-22 2013-02-06 中国水利水电第十四工程局有限公司 Measurement method for mounting and positioning of basic direct-buried foundation bolts of large-scale equipment
CN104234073A (en) * 2014-08-21 2014-12-24 中国十七冶集团有限公司 Deep preformed hole molding construction method
CN105672345A (en) * 2016-02-02 2016-06-15 中国船舶重工集团公司第七一二研究所青岛研究所 Installation method and device for embedded bolt holes of large generator cast iron platform foundation
CN105401591B (en) * 2014-09-03 2017-11-28 五冶集团上海有限公司 Pre-embedded bolt corrugated sleeve installation method
CN110241845A (en) * 2019-07-12 2019-09-17 中国化学工程第十一建设有限公司 A kind of Equipment Foundations preformed hole fuse and its construction method easy to dismantle
CN114934413A (en) * 2022-06-29 2022-08-23 中核华辰建筑工程有限公司 Group ground steel rail construction method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61106828A (en) * 1984-10-31 1986-05-24 Hitachi Ltd Method of burying foundation bolt and forms therefor
CN2094580U (en) * 1991-06-24 1992-01-29 马大地 Hole forming device for prismatic preset hole
JPH06248769A (en) * 1993-03-01 1994-09-06 Misawa Homes Co Ltd Construction method of ventilating ridge for square roof
CN201367595Y (en) * 2009-03-03 2009-12-23 南通建工集团股份有限公司 Device for reserving hole of anchor bolt
CN201512949U (en) * 2009-09-15 2010-06-23 中国石油化工集团公司 Reversed conical prepared hole forming device for foundation of concrete device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61106828A (en) * 1984-10-31 1986-05-24 Hitachi Ltd Method of burying foundation bolt and forms therefor
CN2094580U (en) * 1991-06-24 1992-01-29 马大地 Hole forming device for prismatic preset hole
JPH06248769A (en) * 1993-03-01 1994-09-06 Misawa Homes Co Ltd Construction method of ventilating ridge for square roof
CN201367595Y (en) * 2009-03-03 2009-12-23 南通建工集团股份有限公司 Device for reserving hole of anchor bolt
CN201512949U (en) * 2009-09-15 2010-06-23 中国石油化工集团公司 Reversed conical prepared hole forming device for foundation of concrete device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘巍然等: "聚合釜基础地脚螺栓预留孔的不拆模施工", 《化工科技》 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102660960A (en) * 2012-05-18 2012-09-12 中国水利水电第十四工程局有限公司 Detachment-free foundation bolt hole device of stator foundation and grouting method
CN102912813A (en) * 2012-11-22 2013-02-06 中国水利水电第十四工程局有限公司 Measurement method for mounting and positioning of basic direct-buried foundation bolts of large-scale equipment
CN104234073A (en) * 2014-08-21 2014-12-24 中国十七冶集团有限公司 Deep preformed hole molding construction method
CN104234073B (en) * 2014-08-21 2016-10-05 中国十七冶集团有限公司 One deeper reserving hole molding construction method
CN105401591B (en) * 2014-09-03 2017-11-28 五冶集团上海有限公司 Pre-embedded bolt corrugated sleeve installation method
CN105672345A (en) * 2016-02-02 2016-06-15 中国船舶重工集团公司第七一二研究所青岛研究所 Installation method and device for embedded bolt holes of large generator cast iron platform foundation
CN110241845A (en) * 2019-07-12 2019-09-17 中国化学工程第十一建设有限公司 A kind of Equipment Foundations preformed hole fuse and its construction method easy to dismantle
CN114934413A (en) * 2022-06-29 2022-08-23 中核华辰建筑工程有限公司 Group ground steel rail construction method
CN114934413B (en) * 2022-06-29 2024-07-12 中核华辰建筑工程有限公司 Group ground steel rail construction method

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