CN103452315B - A kind of high-precision section thin-walled concrete hole body structure construction method - Google Patents

A kind of high-precision section thin-walled concrete hole body structure construction method Download PDF

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Publication number
CN103452315B
CN103452315B CN201310371627.3A CN201310371627A CN103452315B CN 103452315 B CN103452315 B CN 103452315B CN 201310371627 A CN201310371627 A CN 201310371627A CN 103452315 B CN103452315 B CN 103452315B
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China
Prior art keywords
hole body
concrete
template
profile
set up
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CN201310371627.3A
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Chinese (zh)
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CN103452315A (en
Inventor
邴光利
李博平
杨辉
白联锋
李乐
徐忠超
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中国人民解放军63926部队
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Priority to CN201310371627.3A priority Critical patent/CN103452315B/en
Publication of CN103452315A publication Critical patent/CN103452315A/en
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Abstract

The invention belongs to exceptional structure concrete hole body structure construction technology, relate to that a kind of complexity is various, precision superelevation and cannot by the special-shaped thin-walled hole body construction control method in normal scaffold building formwork control accuracy situation.A kind of high-precision section thin-walled concrete hole body structure construction method, is characterized in that it comprises following steps: 1) set up axial plane Controling network and high process control; 2) on back fill course, use hardening of concrete terrace, create the support platform of an Equalsettlement, platform is set up full door frame scaffold support system, profile spacing timber truss installa-tion, be fixed on full door frame scaffold; 3) according to design drawing, template is put full pattern, numbering by 1:1, be made into the template of sizing, location truss carries out hole body template check mark and installs, reinforcing is installed; 4) self-compacting concrete is adopted to carry out concreting.

Description

A kind of high-precision section thin-walled concrete hole body structure construction method

Technical field

The invention belongs to exceptional structure concrete hole body structure construction technology, relate to that a kind of complexity is various, precision superelevation and cannot by the special-shaped thin-walled hole body construction control method in normal scaffold building formwork control accuracy situation.

Background technology

General building, the conventionally forms such as scaffold can be set up to realize the foundation of support system, if the method that the special hole body for some planes of bending conveniently sets up full door frame scaffold installs template, then cannot meet construction precision requirement, must technological innovation be carried out, consider other construction method.

Therefore, how to solve the support issues such as the templatespace location reinforcing of high-precision section thin-walled hole phosphor bodies construction, steel bar meter and installation location, ensure concrete pouring quality and guarantee that wind-tunnel main shaft axiality meets one of technological design allowable error key technology difficult problem becoming construction.

Summary of the invention

The object of the present invention is to provide a kind of high-precision section thin-walled concrete hole body structure construction method, the method can guarantee the Forming Quality of special-shaped thin wall structural concrete.

Adopt following technical scheme:

(1) utilize CAD drawing, for hole body each portion section molding surface size, set up BIM by professional software SketchUp, Revit, obtain high-precision section thin-walledthe continuity Accuracy Space coordinate of hole body, and the special-shaped hole body of the 1:100 entity be processed into inside and outside profile model guiding construction process;

(2) axial plane Controling network and vertical control network is set up;

(3) on back fill course, use hardening of concrete terrace, create the support platform of an Equalsettlement, platform is set up full door frame scaffold support system, profile is located truss installa-tion, is fixed on full door frame scaffold;

(4) template, (hereinafter referred to as the location truss) fabrication and installation of profile location truss and reinforcing bar binding are fixed:

According to profile change curvature in special-shaped thin wall concrete hole body in design drawing, the Accuracy Space coordinate of the special-shaped thin wall hole body utilizing step 1) to determine, puts full pattern, numbering by template by 1:1, is made into the template of sizing, checks the number and install during installation;

Location truss on carry out bottom hole body each portion section, inside and outside, top formwork erection install reinforce; By body axis, hole, profile localization examination is carried out to template.

(5) concreting is shaping:, adopt self-compacting concrete, strictly control match ratio, ensure concreting one-shot forming.

Described hardening of concrete terrace is completely laid on below the full door frame scaffold of hole body bed die, one-tenth-value thickness 1/10 is more than or equal to 15cm, terrace concrete class is C20, prevent the uneven subsidence of support system in concreting process, relative settlement appears in the special-shaped thin wall concrete structure caused, coaxial accuracy do not reach designing requirement.

Described location truss is made according to the sizing of the hole build face curvature, ribs, stressed member, rest rod member mainly using the different model lumps of wood as location truss.

The invention has the beneficial effects as follows: working procedure is reasonable, method economical and efficient, support system are stable, easy to operate, safe and reliable, especially efficiently solve the support issues such as templatespace location reinforcing in the phosphor bodies construction of special-shaped thin wall hole, steel bar meter and installation location, ensure concrete pouring quality, guarantee that wind-tunnel main shaft axiality meets technological requirement.

Accompanying drawing explanation

Fig. 1 is hole of the present invention body each portion section sectional plan schematic diagram.

Fig. 2 is profile location truss longitudinal profile schematic diagram in certain hole, contraction section top body of the present invention.

Fig. 3 is profile location truss horizontal section schematic diagram in certain eight hole, corner sections top body of the present invention.

In figure: 1 is hole phosphor bodies structure, 2 is hole body attached factory building I sections, and 3 is hole body attached factory building II sections, and 4 is hole body attached factory building III sections; 5 is 10mm templates, the control panel in build face, hole; 6 is ribs of 50mm × 80mm lumps of wood, profile template; 7 is 50mm × 100mm lumps of wood, the stressed member of location truss; 8 is 90mm × 100mm lumps of wood, is supported on scaffold; 9 is location truss.

Detailed description of the invention

So that below in conjunction with example, accompanying drawing, the present invention is further described.

Certain continous way list backflow wind-tunnel is concrete hole, high accuracy super large special-shaped thin wall gradual change cross section body structure, and each portion section downbeam jump≤2mm, axis coaxle degree≤φ 4mm, indivedual portion section axis coaxle degree≤φ 4mm, required precision is high.Its construction detailed process is as follows:

(1) 3 D stereo artwork and physical model is obtained:

According to construction drawing, utilize professional software SketchUp, Revit to set up BIM, obtain high-precision section thin-walledthe continuity Accuracy Space coordinate of hole body, and the inside and outside profile model of the abnormally-structured tunnel body for wind of the 1:100 be processed into 1, in construction, intuitive expresses effective guiding construction process;

(2) in the terrace base treatment of pile foundation construction backfill, adopt the C20 hardening of concrete ground effects bearing surface of 15cm, build a support platform with full door frame scaffold;

(3) the construction axial plane Controling network and vertical control network that meet design accuracy requirement is set up according to given I and II Controling network pilot measurement, and adopted in the control point of the main shaft control point in horizontal control network and vertical control network, bus control line and spot height the throwing of control extension piling method to be set on foundation platform, sclerosis terrace, full door frame scaffold, throw the control point surveyed totally for three times and mark with red mixed paint.

(4) template, reinforcing bar are fixed, are checked

Location truss 9 fabrication and installation:

According to designing the coordinate value given, offseting the size that its thickness obtains structure, making location truss 9 with this;

According to the Accuracy Space coordinate of the special-shaped thin wall hole body 1 that the change of segment type face, each portion of hole body in design drawing and step (1) are determined, template 5 is put full pattern on the ground by 1:1, be made into the template 5 of sizing, numbering, check the number during installation form 5 and install;

By body axis, hole vertical projection line throw survey in hole body prop up fully support door frame scaffold transverse tube on, installation in position location truss 9, to locate truss 9 center line and body axis, hole vertical projection line centering, error is not more than 1mm, and observing and controlling location truss 9 is in axis vertical plane; Location truss 9 rod member spacing is longitudinally 1.5-2m, is laterally 2-3m.

Location truss 9 carries out bottom, inside and outside, top template 5 installs and install reinforcing; Finally by axis, profile localization examination and fastness inspection are carried out to template 5, realize the accurately assembled of template 5 curved surface with this, prevent its sliding deformation.

After the body bed die installation of hole, want walkthrough colligation order before carrying out hole body reinforcing bar binding, process of binding, the reinforcing bar distribution situation of the good encrypted area of combing, node area, reserves concrete vibrating mouth.Hole, bottom body reinforcing bar binding is complete and by after concealment acceptance, can install hole body inner formword 5, inner formword 5 installation in position size is determined by external mold, the inside and outside intermode size of strict control, and interior external mold ф 14mm Screw arbor with nut at both-ends is fixed; After internal mold installation in position, by body axis, the hole traction string of a musical instrument, check internal mold molding surface size, departure is in wind-tunnel standards of acceptance allowed band; When installing hole, top body internal mold, survey in the wind-tunnel axis of surface, hole, bottom according to throwing, hole body section profile control line, location, height measurement installation in position top truss 9, location truss 9 is supported on the interior full door frame scaffold of hole body, location truss 9 templates 5 support and need encryption, supported rod erecting spacing is not more than 1m, and hole body beam lower support vertical pole ' s span is not more than 0.5m; The all portion Duan Jun of special-shaped hole body construct according to the method.

In construction body section two ends, hole erection bracket, traction steel wire replaces wind-tunnel axis, corrects steel wire position with transit and level gauge, and itself and wind-tunnel theoretical center are coincide, and permission measure error is 1mm.Check hole body inner mould surface size according to traction steel wire line, guarantee that hole body 1 profile accurately controls.

(5) concrete construction is built shaping

In hole body 1 concreting process, use self-compacting concrete, concrete mix of strictly controlling well is selected materials, and carries out concrete construction Mix Ratio Test in advance, guarantees that it has good fluidity, fillibility and water retention.Show that the Gradation Control of aggregate and high efficiency water reducing agent realize concrete high fluidity, high fillibility by independently studying, stirring in reinforcing bar compact districts such as swash plate and top board, top board and upper reversed beam, primary-secondary beam and cant beams vibrates in process, utilize the mobility of self-compacting concrete, follow concreting, vibrate code requirement, what achieve thin wall concrete agent structure builds operation.

Claims (1)

1. a high-precision section thin-walled concrete hole body structure construction method, is characterized in that it comprises the steps:
1) set up hole body BIM by professional software SketchUp, Revit, obtain the continuity Accuracy Space coordinate of high-precision section thin-walled hole body, and the special-shaped hole body of the 1:100 entity be processed into inside and outside profile model guiding construction process;
2) axial plane Controling network and vertical control network is set up;
3) on back fill course, use hardening of concrete terrace, create the support platform of an Equalsettlement, platform is set up full hall scaffold support system, profile is located truss installa-tion, is fixed on full door frame scaffold;
4) template, the truss fabrication installation of profile location and reinforcing bar binding are fixed:
According to profile change curvature in special-shaped thin wall hole body in design drawing, the Accuracy Space coordinate of the special-shaped thin wall hole body utilizing step 1) to determine, puts full pattern, numbering by template by 1:1, is made into the template of sizing, checks the number and install during installation;
Location truss on carry out bottom hole body each portion section, inside and outside, top formwork erection install reinforce; By body axis, hole, profile localization examination is carried out to template;
5) concreting is shaping: adopt self-compacting concrete to carry out hole body concrete and build.
CN201310371627.3A 2013-08-23 2013-08-23 A kind of high-precision section thin-walled concrete hole body structure construction method CN103452315B (en)

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CN201310371627.3A CN103452315B (en) 2013-08-23 2013-08-23 A kind of high-precision section thin-walled concrete hole body structure construction method

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CN106245906A (en) * 2016-08-30 2016-12-21 中国葛洲坝集团三峡建设工程有限公司 The auxiliary abnormal formwork design of a kind of threedimensional model and the method installed

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