CN103669228B - Self-propelled moveable formwork camber method of adjustment - Google Patents

Self-propelled moveable formwork camber method of adjustment Download PDF

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Publication number
CN103669228B
CN103669228B CN201310716980.0A CN201310716980A CN103669228B CN 103669228 B CN103669228 B CN 103669228B CN 201310716980 A CN201310716980 A CN 201310716980A CN 103669228 B CN103669228 B CN 103669228B
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camber
level
mobile formwork
exterior sheathing
value
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CN103669228A (en
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赵立财
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Third Engineering Co Ltd of China Railway 19th Bureau Group Co Ltd
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Third Engineering Co Ltd of China Railway 19th Bureau Group Co Ltd
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Abstract

The invention discloses a kind of self-propelled moveable formwork camber method of adjustment, solve the problem that the effect of the precompressed correction camber that existing prestressing technology exists is bad.It is included in mobile formwork template external fin framework (2) being provided with rhombus on bridge pier (1), the base plate of mobile formwork template external fin framework (2) of rhombus is provided with adjustable exterior sheathing support post (5) and mobile formwork exterior sheathing (3), mobile formwork template external fin framework (2) is provided with mobile formwork exterior sheathing (3), flange plate in mobile formwork exterior sheathing (3), first order prefabricating load sand pocket (8) it is evenly equipped with on two coxostermums and base plate, first order prefabricating load sand pocket (8) is evenly equipped with second level prefabricating load slag weight concrete block (9), second level prefabricating load slag weight concrete block (9) is evenly equipped with third level precompressed stone flour bag (10).Preloading method precise calibration of the present invention template camber, improves the construction quality of cast-in-situ box girder.

Description

Self-propelled moveable formwork camber method of adjustment
Technical field
After the present invention relates to a kind of mobile formwork assembly, camber to outboard template carries out the devices and methods therefor of precompressed adjustment.
Background technology
Mobile formwork is different from each bolt clipping forcee due to gap during assembly, makes the mobile formwork exterior sheathing after assembly there will be the phenomenon that arches upward, have impact on the quality of prefabricated box-beam.Mobile formwork needs to carry out mobile formwork precompressed before the first hole box girder construction, and tradition precompressed mode is to be pressed onto between the base plate of mobile formwork and web by sand pocket heap, is used for eliminating the inelastic deformation of base plate and web, the elastic deformation of flange plate is not carried out precompressed;This precompressed mode carries out precompressed only with the form arbitrarily stacking sand pocket, the effect of precompressed correction camber is bad, also result in the generation of new inelastic deformation, have a strong impact on in-situ beam casting quality, the most existing preloading method be use sand pocket and stone flour bag by the 102% of this hole box beam gross weight load capacity carry out precompressed, it is impossible to the camber deviation of the gradual virtual condition overcoming box beam external mold.
Summary of the invention
The invention provides self-propelled moveable formwork camber adjusting apparatus and method of adjustment thereof, solve what existing prestressing technology existed, the effect of precompressed correction camber is bad, the problem also resulting in the generation of new inelastic deformation.
The present invention is to solve above technical problem by the following technical programs:
nullA kind of self-propelled moveable formwork camber adjusting apparatus,Including bridge pier,Bridge pier is provided with the mobile formwork template external fin framework of rhombus,The base plate of the mobile formwork template external fin framework of rhombus is provided with adjustable exterior sheathing support post,Adjustable exterior sheathing support post is provided with mobile formwork exterior sheathing,The mobile formwork girder of band outrigger it is provided with in the upper end of the mobile formwork template external fin framework of rhombus,It is provided with mobile formwork exterior sheathing in mobile formwork template external fin framework,Flange plate at mobile formwork exterior sheathing、First order prefabricating load sand pocket all it is evenly equipped with on two coxostermums and base plate,Second level prefabricating load slag weight concrete block it is evenly equipped with on first order prefabricating load sand pocket on the base plate of mobile formwork exterior sheathing,Second level prefabricating load slag weight concrete block is evenly equipped with third level precompressed stone flour bag.
Between the mobile formwork girder and the base plate of mobile formwork template external fin framework of band outrigger, it is provided with high-strength deformed steel bar suspension rod, between the web and mobile formwork template external fin framework of mobile formwork exterior sheathing, is provided with diagonal brace pull bar.
A kind of self-propelled moveable formwork camber method of adjustment, comprises the following steps:,
The first step, the mobile formwork template external fin framework of rhombus is set on bridge pier, the base plate of the mobile formwork template external fin framework of rhombus arranges adjustable exterior sheathing support post, outside assembled mobile formwork exterior sheathing on shuttering supporting column;
Second step, the first camber deformation observation point is set in the outermost of the flange plate of mobile formwork exterior sheathing, in flange plate and web junction, the second camber deformation observation point is set, 3rd camber deformation observation point is set at web and base plate binding site, the 4th camber deformation observation point is set in the middle of the base plate of mobile formwork exterior sheathing;
3rd step, the camber value of default first camber deformation observation point are 0.63 centimetre, the camber value presetting the second camber deformation observation point is 1.72 centimetres, the camber value presetting the 3rd camber deformation observation point is 2.81 centimetres, and the camber value presetting the 4th camber deformation observation point is 3.9 centimetres;
4th step, the 50% of the box beam gross weight that will pour as self-propelled moveable formwork determines the gross weight of prefabricating load sand pocket used by the first order, and by determined by the uniform flange plate being placed into mobile formwork exterior sheathing of prefabricating load sand pocket used by the first order, on two coxostermums and base plate, observe by the practical distortion value of determined by second step four camber deformation observation points, and the preset value one_to_one corresponding of default with the 3rd step for the practical distortion value of four camber deformation observation points four camber deformation observation points is compared, if practical distortion value is all close with preset value, keep prefabricating load sand pocket 12 hours used by the precompressed first order, then prefabricating load sand pocket used by the first order is removed;If practical distortion value is respectively less than preset value, carry out the 5th step;
5th step, the 80% of the box beam gross weight that will pour as self-propelled moveable formwork determines the gross weight of prefabricating load slag weight concrete block used by the second level, and above prefabricating load sand pocket used by the first order on the uniform base plate being placed into mobile formwork exterior sheathing of slag weight concrete block used by the second level, observe by the practical distortion value of determined by second step four camber deformation observation points, and the preset value one_to_one corresponding of default with the 3rd step for the practical distortion value of four camber deformation observation points four camber deformation observation points is compared, if practical distortion value is all close with preset value, keep slag weight concrete block 12 hours used by prefabricating load sand pocket used by the precompressed first order and the second level, then slag weight concrete block used by prefabricating load sand pocket used by the first order and the second level is removed;If practical distortion value is respectively less than preset value, carry out the 6th step;
6th step, the 102% of the box beam gross weight that will pour as self-propelled moveable formwork determines the gross weight of precompressed stone flour bag used by the third level, and above slag weight concrete block used by the second level on the uniform base plate being placed into mobile formwork exterior sheathing of stone flour bag used by the third level, observe by the practical distortion value of determined by second step four camber deformation observation points, and the preset value one_to_one corresponding of default with the 3rd step for the practical distortion value of four camber deformation observation points four camber deformation observation points is compared, if practical distortion value is all close with preset value, keep prefabricating load sand pocket used by the precompressed first order, stone flour bag 12 hours used by slag weight concrete block used by the second level and the third level, remove prefabricating load sand pocket used by the first order, stone flour bag used by slag weight concrete block used by the second level and the third level;
7th step, one by one fine setting exterior sheathing support post top lifting height make the measured value of four camber deformation observation points be equal to preset value determined by the 3rd step.
Apparatus of the present invention load precompressed by three grades and well eliminate the camber of moving die plate exterior sheathing, correct template bed die absolute altitude, and material is saved in precompressed, and prepressing materials loading and unloading is convenient, improves the construction quality of cast-in-situ box girder.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
nullA kind of self-propelled moveable formwork camber adjusting apparatus,Including bridge pier 1,Bridge pier 1 is provided with the mobile formwork template external fin framework 2 of rhombus,The base plate of the mobile formwork template external fin framework 2 of rhombus is provided with adjustable exterior sheathing support post 5,Adjustable exterior sheathing support post 5 is provided with mobile formwork exterior sheathing 3,The mobile formwork girder 6 of band outrigger it is provided with in the upper end of the mobile formwork template external fin framework 2 of rhombus,It is provided with mobile formwork exterior sheathing 3 in mobile formwork template external fin framework 2,Flange plate at mobile formwork exterior sheathing 3、First order prefabricating load sand pocket 8 all it is evenly equipped with on two coxostermums and base plate,Second level prefabricating load slag weight concrete block 9 it is evenly equipped with on first order prefabricating load sand pocket 8 on the base plate of mobile formwork exterior sheathing 3,Second level prefabricating load slag weight concrete block 9 is evenly equipped with third level precompressed stone flour bag 10.
Between the mobile formwork girder 6 and the base plate of mobile formwork template external fin framework 2 of band outrigger, it is provided with high-strength deformed steel bar suspension rod 7, between the web and mobile formwork template external fin framework 2 of mobile formwork exterior sheathing 3, is provided with diagonal brace pull bar 4.
A kind of self-propelled moveable formwork camber method of adjustment, comprises the following steps:
The first step, the mobile formwork template external fin framework 2 of rhombus is set on bridge pier 1, the base plate of the mobile formwork template external fin framework 2 of rhombus arranges adjustable exterior sheathing support post 5, outside assembled mobile formwork exterior sheathing 3 on shuttering supporting column 5;
Second step, the first camber deformation observation point is set in the outermost of the flange plate of mobile formwork exterior sheathing 3, in flange plate and web junction, the second camber deformation observation point is set, 3rd camber deformation observation point is set at web and base plate binding site, the 4th camber deformation observation point is set in the middle of the base plate of mobile formwork exterior sheathing 3;
3rd step, the camber value of default first camber deformation observation point are 0.63 centimetre, the camber value presetting the second camber deformation observation point is 1.72 centimetres, the camber value presetting the 3rd camber deformation observation point is 2.81 centimetres, and the camber value presetting the 4th camber deformation observation point is 3.9 centimetres;
4th step, the 50% of the box beam gross weight that will pour as self-propelled moveable formwork determines the gross weight of prefabricating load sand pocket 8 used by the first order, and by determined by the uniform flange plate being placed into mobile formwork exterior sheathing 3 of prefabricating load sand pocket 8 used by the first order, on two coxostermums and base plate, observe by the practical distortion value of determined by second step four camber deformation observation points, and the preset value one_to_one corresponding of default with the 3rd step for the practical distortion value of four camber deformation observation points four camber deformation observation points is compared, if practical distortion value is all close with preset value, keep prefabricating load sand pocket 12 hours used by the precompressed first order, then prefabricating load sand pocket used by the first order is removed;If practical distortion value is respectively less than preset value, carry out the 5th step;
5th step, the 80% of the box beam gross weight that will pour as self-propelled moveable formwork determines the gross weight of prefabricating load slag weight concrete block 9 used by the second level, and above prefabricating load sand pocket 8 used by the first order on the uniform base plate being placed into mobile formwork exterior sheathing 3 of slag weight concrete block 9 used by the second level, observe by the practical distortion value of determined by second step four camber deformation observation points, and the preset value one_to_one corresponding of default with the 3rd step for the practical distortion value of four camber deformation observation points four camber deformation observation points is compared, if practical distortion value is all close with preset value, keep slag weight concrete block 12 hours used by prefabricating load sand pocket used by the precompressed first order and the second level, then slag weight concrete block 9 used by prefabricating load sand pocket used by the first order and the second level is removed;If practical distortion value is respectively less than preset value, carry out the 6th step;
null6th step、The 102% of the box beam gross weight that will pour as self-propelled moveable formwork determines the gross weight of precompressed stone flour bag 10 used by the third level,And above slag weight concrete block 9 used by the second level on the uniform base plate being placed into mobile formwork exterior sheathing 3 of stone flour bag 10 used by the third level,Observe by the practical distortion value of determined by second step four camber deformation observation points,And the preset value one_to_one corresponding of default with the 3rd step for the practical distortion value of four camber deformation observation points four camber deformation observation points is compared,If practical distortion value is all close with preset value,Keep prefabricating load sand pocket used by the precompressed first order、Stone flour bag 12 hours used by slag weight concrete block 9 used by the second level and the third level,Remove prefabricating load sand pocket used by the first order、Stone flour bag 10 used by slag weight concrete block 9 used by the second level and the third level;
7th step, one by one fine setting exterior sheathing support post 5 top lifting height make the measured value of four camber deformation observation points be equal to preset value determined by the 3rd step.

Claims (1)

1. a self-propelled moveable formwork camber method of adjustment, comprises the following steps:
The first step, mobile formwork template external fin framework (2) of rhombus is set on bridge pier (1), The base plate of mobile formwork template external fin framework (2) of rhombus arranges adjustable exterior sheathing Support post (5), the outside upper assembled mobile formwork exterior sheathing (3) of shuttering supporting column (5);
Second step, to arrange first in the outermost of the flange plate of mobile formwork exterior sheathing (3) pre- Camber deformation observation point, arranges the second camber deformation observation in flange plate and web junction Point, the base plate binding site at web Yu mobile formwork exterior sheathing (3) arranges the 3rd camber and becomes Shape observation station, arranges the 4th camber deformation in the middle of the base plate of mobile formwork exterior sheathing (3) Observation station;
3rd step, the camber value of default first camber deformation observation point are 0.63 centimetre, The camber value presetting the second camber deformation observation point is 1.72 centimetres, presets the 3rd and encircles in advance The camber value of degree deformation observation point is 2.81 centimetres, presets the 4th camber deformation observation point Camber value be 3.9 centimetres;
4th step, the 50% of the box beam gross weight that will pour by self-propelled moveable formwork determine first The gross weight of level prefabricating load sand pocket (8) used, and precompressed used by the first order determined by general Load sand pocket (8) is uniform is placed into the flange plate of mobile formwork exterior sheathing (3), two coxostermums With on base plate, observe by the practical distortion of determined by second step four camber deformation observation points Value, and by the practical distortion value of four camber deformation observation points and default four of the 3rd step The preset value one_to_one corresponding of camber deformation observation point compares, if practical distortion value is equal and preset value Close, keep prefabricating load sand pocket 12 hours used by the precompressed first order, then remove first Level prefabricating load sand pocket used;If practical distortion value is respectively less than preset value, carry out the 5th step;
5th step, the 80% of the box beam gross weight that will pour by self-propelled moveable formwork determine second The gross weight of level prefabricating load slag weight concrete block (9) used, and used by the second level Prefabricating load slag weight concrete block (9) is uniform is placed into mobile formwork exterior sheathing (3) Above, observation is determined prefabricating load sand pocket (8) used by the first order on base plate by second step The practical distortion value of four camber deformation observation points, and by four camber deformation observation points The preset value one of practical distortion value and default four the camber deformation observation points of the 3rd step One correspondence compares, if practical distortion value is all close with preset value, keeps pre-used by the precompressed first order Prefabricating load slag weight concrete block (9) 12 hours used by pressure load sand pocket and the second level, Then prefabricating load slag counterweight used by prefabricating load sand pocket used by the first order and the second level is removed Concrete block (9);If practical distortion value is respectively less than preset value, carry out the 6th step;
6th step, the 102% of the box beam gross weight that will pour by self-propelled moveable formwork determine The gross weight of precompressed stone flour bag (10) used by three grades, and precompressed stone flour bag (10) used by the third level Prefabricating load steel used by the second level on the uniform base plate being placed into mobile formwork exterior sheathing (3) Slag weight concrete block (9) above, is observed by determined by second step four camber deformation The practical distortion value of observation station, and by the practical distortion value of four camber deformation observation points and the The preset value one_to_one corresponding of default four the camber deformation observation points of three steps compares, if actual Deformation values is all close with preset value, keeps prefabricating load sand pocket, the second level used by the precompressed first order Precompressed stone flour bag (10) used by prefabricating load slag weight concrete block (9) used and the third level 12 hours, remove prefabricating load slag used by prefabricating load sand pocket, the second level used by the first order Precompressed stone flour bag (10) used by weight concrete block (9) and the third level;
7th step, one by one fine setting exterior sheathing support post (5) top lifting height make four cambers The measured value of deformation observation point is equal to preset value determined by the 3rd step.
CN201310716980.0A 2013-12-24 2013-12-24 Self-propelled moveable formwork camber method of adjustment Active CN103669228B (en)

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CN105887689B (en) * 2016-04-29 2018-02-06 浙江省建设工程质量检验站有限公司 Bridge pouring construction device and its construction method
CN108425323B (en) * 2018-03-23 2019-08-23 中铁建大桥工程局集团第四工程有限公司 A kind of cast-in-place box beam assembled moving template
CN109338894B (en) * 2018-11-22 2020-05-12 中铁十二局集团第一工程有限公司 Construction method for pouring wide and narrow box girder by movable formwork

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