EP3868979B1 - Method for tensioning prefabricated component employing centroid tracking and seam width control - Google Patents

Method for tensioning prefabricated component employing centroid tracking and seam width control Download PDF

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Publication number
EP3868979B1
EP3868979B1 EP20873341.0A EP20873341A EP3868979B1 EP 3868979 B1 EP3868979 B1 EP 3868979B1 EP 20873341 A EP20873341 A EP 20873341A EP 3868979 B1 EP3868979 B1 EP 3868979B1
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EP
European Patent Office
Prior art keywords
rubber gasket
centroid
tension
jack
prefabricated component
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP20873341.0A
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German (de)
English (en)
French (fr)
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EP3868979A1 (en
EP3868979A4 (en
Inventor
Xiuren YANG
Meiqun Huang
Zhiyong Peng
Fang Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Urban Construction Design And Development Group Co Ltd
Beijing Urban Construction Design and Development Group Co Ltd
Original Assignee
Beijing Urban Construction Design And Development Group Co Ltd
Beijing Urban Construction Design and Development Group Co Ltd
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Publication of EP3868979A1 publication Critical patent/EP3868979A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/121—Construction of stressing jacks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/16—Arrangement or construction of joints in foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0046—Production methods using prestressing techniques

Definitions

  • the invention relates to the technical field of building engineering, in particular to a tensioning method of prefabricated component based on centroid tracking and seam width control such as generally known from CN 107 34 5401 B .
  • Prefabricated assembly technology usually uses rubber gaskets as the key waterproof material for longitudinal and circumferential joints of assembly components when applied in underground structure.
  • This material is usually composed of a non-linear elastic material. Under effect of the tensioning force of the assembly Jack, it can change shape following change of width of seam between the components. It on one hand can ensure waterproof and sealing performance seam between the components, on the other hand can provide cushioning effect for the components in the assembling and completing stages, so as to avoid quality degradation problems such as component cracking due to collision.
  • each component In assembling the components of assembly type, each component is required to be subjected to multi-point tension by using several Jacks.
  • a tensioning method for the prefabricated components of assembly type in which by dynamically tracking relationship between centroid position of the reaction force of the rubber gasket and geometric centroid position of the rubber gasket, tension load of several tension Jacks at the next moment is determined, to gradually approach target tension position of the component of assembly type, and reach a preset seam width and ensure that the seam width is even.
  • gaskets 7 and 6 are symmetrically arranged on contact surface 4 of former group of components B-2 and contact surface 5 of components B-1 to be assembled, and width of seam between two components is affected by magnitudes and positions of tension force of a plurality of Jacks through tension hole 1, elastic reaction force of the gasket and sliding friction force of adjacent components and cushion layer. Under effect of tension forces from multiple groups of Jacks at different positions, gaskets 6 and 7 are compressed to produce elastic reaction forces.
  • centroid of effecting forces from multiple groups of Jack may not coincide with geometric centroid of the gaskets, so that centroid of elastic reaction forces produced by the gaskets does not coincide with their geometric centroid, resulting in inconsistent compression deformation of the gaskets at different positions of the seams.
  • inventor of an embodiment of the invention researched and invented a tensioning method of prefabricated component based on centroid tracking and seam width control, by dedicated researching and designing, and combining experience and achievements of long time in related industries, in order to overcome the above defects.
  • An object of an embodiment of the invention is to provide a tensioning method of prefabricated component based on centroid tracking and seam width control, which can realize that when the prefabricated component is tensioned, the rubber gasket is evenly compressed, and width of seam of which is same at all positions of the seam. so as to improve assembly accuracy of large prefabricated components and construction quality of prefabricated structures of assembly type.
  • the invention discloses a tensioning method of prefabricated component based on centroid tracking and seam width control, as specified in claim 1.
  • any point of the coordinate set ⁇ of center points of micro-segments of centerline of a rubber gasket represents a square micro-segment of the rubber gasket
  • length of each micro-segment of the rubber gasket is equal to width ⁇ of the rubber gasket
  • Coordinates of centroid ( X P ,Y P ) of the tension of the Jack in Step 3 can be calculated by formulae 5 and 6:
  • Required tension distance on tension point 1 of the Jack at different positions is converted into the tension force of the Jack, and oil pressure and oil speed of a hydraulic control center are controlled.
  • the tension forces of each group of Jacks are adjusted, to make the centroid of tension force of the Jack and the centroid of reaction force of the rubber gasket are symmetrical with each other, with the geometric centroid of the rubber gasket as center, so that the centroid of reaction force of the rubber gasket tends to move gradually towards the geometric centroid of the rubber gasket, so that the centroid of tension force of the Jack is adjusted to be symmetrical with the position of the centroid of reaction force of the rubber gasket accordingly.
  • the plane of the component on which the rubber gasket is located is captured by a camera device to obtain the image of the component, which is then subjected to correction of image distortion and tilt distortion, information in the image is corrected by manual guidance, and skeleton contour line of the rubber gasket in the image is recognized by image recognition technology, then a center line of the skeleton contour line in the image of the rubber gasket and a center point of bolt hole position are recognized, and any point in the image is selected as the origin to establish a coordinate system, which is defined as the XOY plane coordinate system.
  • the tensioning method of prefabricated component based on centroid tracking and seam width control of an embodiment of the invention based on centroid tracking and seam width control has at least following advantages:
  • Figs. 1A to 6B shows the tensioning method of prefabricated component based on centroid tracking and seam width control of an embodiment of the invention.
  • Step 5 of performing tensioning on prefabricated components of assembly type based on the centroid tracking positions of tension point of the Jack for the prefabricated component should be as close as possible to the measuring points of seam width, but due to various restrictions, it is hard to ensure that all measuring points of seam width correspond to the positions of tension point of the Jack, thus it is usually necessary to use actually measured data to calculate the seam width of tension point of the Jack, so the tensioning of the prefabricated component based on seam width control may lead to problems on tension quality and efficiency.
  • assembling and tensioning work can be completed by the tensioning method on prefabricated components of assembly type based on the centroid tracking.
  • the centroid 14 of tension force of the Jack does not coincide with the geometric centroid 12 of the rubber gasket, resulting in inconsistence of compression degree of the gasket, then the centroid 11 of reaction force of the rubber gasket does not coincide with the geometric centroid 12 of the rubber gasket.
  • the tension forces of each group of Jacks are adjusted, to make the centroid 14 of tension force of the Jack and the centroid 11 of reaction force of the rubber gasket are symmetrical with each other, with the geometric centroid 12 of the rubber gasket as center, as shown as a and a' in the figure, so that the centroid of reaction force of the rubber gasket tends to move gradually towards the geometric centroid 12 of the rubber gasket along connection line aa' between 11 and 14.
  • the centroid 11 of reaction force of the rubber gasket constantly approaches the position of the geometric centroid 12 of the rubber gasket along a' ⁇ b' ⁇ c' ⁇ d'
  • the centroid 14 of tension force of the Jack also constantly approach the position of the geometric centroid 12 of the rubber gasket along a ⁇ b ⁇ c ⁇ d with changing of the position of the centroid 11 of reaction force of the rubber gasket, and finally realize that all of the centroid 14 of tension force of the Jack, the centroid 11 of reaction force of the gasket and the geometric centroid 12 of the gasket are consistent and compression degree all over the gasket is consistent, thus when assembling of the component is completed, the width all over the seam is equal.
  • the coordinates of geometric centroid 12, centroid 11 of reaction force of the rubber gasket, as well as the centroid 14 of tension force of the Jack are calculated in real time according to step 2 and step 3.
  • the coordinates of the geometric centroid 12, the centroid 11 of reaction force of the rubber gasket, as well as the centroid 14 of tension force of the Jack it is necessary to ensure that the coordinates of the centroid 11 of reaction force and the centroid 14 of tension force of the Jack are distributed on both sides of the geometrical centroid 12 of the gasket.
  • a reminder can be sent automatically by a computer program, and through automatic optimization adjustment by the program or manual adjustment, to ensure that the assembly can be completed accurately and with high quality.
  • advantages of the present invention include:
EP20873341.0A 2019-11-04 2020-10-12 Method for tensioning prefabricated component employing centroid tracking and seam width control Active EP3868979B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911066339.0A CN110924687B (zh) 2019-11-04 2019-11-04 基于形心跟踪和缝宽控制的预制装配式构件张拉方法
PCT/CN2020/120426 WO2021088596A1 (zh) 2019-11-04 2020-10-12 基于形心跟踪和缝宽控制的预制装配式构件张拉方法

Publications (3)

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EP3868979A1 EP3868979A1 (en) 2021-08-25
EP3868979A4 EP3868979A4 (en) 2022-08-03
EP3868979B1 true EP3868979B1 (en) 2024-01-31

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EP20873341.0A Active EP3868979B1 (en) 2019-11-04 2020-10-12 Method for tensioning prefabricated component employing centroid tracking and seam width control

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EP (1) EP3868979B1 (zh)
CN (1) CN110924687B (zh)
WO (1) WO2021088596A1 (zh)

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CN110924687B (zh) * 2019-11-04 2020-12-15 北京城建设计发展集团股份有限公司 基于形心跟踪和缝宽控制的预制装配式构件张拉方法
CN115217156A (zh) * 2022-08-25 2022-10-21 苏州建设(集团)规划建筑设计院有限责任公司 一种新旧混凝土接缝处的防水结构及其施工方法

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JPS6056674B2 (ja) * 1978-09-20 1985-12-11 日立造船株式会社 コンクリ−ト構造物へのプレストレス導入方法
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CN107345401B (zh) * 2017-04-01 2020-02-21 中铁十六局集团地铁工程有限公司 预制装配式车站底板两侧预制构件快速张拉装置及方法
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CN110924687B (zh) * 2019-11-04 2020-12-15 北京城建设计发展集团股份有限公司 基于形心跟踪和缝宽控制的预制装配式构件张拉方法
CN110894727B (zh) * 2019-11-04 2021-04-06 北京城建设计发展集团股份有限公司 预制装配式结构自动拼装控制装备系统及方法

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Publication number Publication date
EP3868979A1 (en) 2021-08-25
WO2021088596A1 (zh) 2021-05-14
CN110924687A (zh) 2020-03-27
CN110924687B (zh) 2020-12-15
EP3868979A4 (en) 2022-08-03

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