CN103770201B - A kind of forming hole method of precast concrete preformed hole - Google Patents
A kind of forming hole method of precast concrete preformed hole Download PDFInfo
- Publication number
- CN103770201B CN103770201B CN201410043133.7A CN201410043133A CN103770201B CN 103770201 B CN103770201 B CN 103770201B CN 201410043133 A CN201410043133 A CN 201410043133A CN 103770201 B CN103770201 B CN 103770201B
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- concrete
- pore
- water
- preformed hole
- forming
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The present invention relates to the forming hole method of a kind of precast concrete preformed hole, belong to concrete structure technique field；When making precast concrete, it is positioned to orifice in preformed hole position, described pore-forming piece uses water-soluble dry material to make, or described pore-forming piece is made up of the water-soluble dry material of the filling member at center and parcel filling member, then casting concrete, after concrete final set, pore-forming piece water is washed away totally, form preformed hole；Or after concrete final set, reject major part pore-forming piece, with water, remainder is washed away totally, form preformed hole；Or after concrete final set, extract filling member out, with water, water-soluble dry material is washed away totally, form preformed hole.The present invention can be used for making the duct of hollow precast concrete member, it is also possible to is used for making precast concrete junction anchor bar preformed hole.
Description
Technical field
The present invention relates to a kind of forming hole method of reserving hole on precast concrete.
Background technology
In concrete structure engineering, a lot of situations need reserving hole.Such as in precast concrete, need pre-
Stay connecting hole for seam crossing Bar Anchorage；Or in hollow precast concrete member, need reserving hole channel.Existing prefabricated
The forming hole method of concrete component is usually and arranges mould or pore-forming piece in steel pipe in concrete, extracts shape before concrete final set out
Become hole；This method is taken out the hole time and is difficult to hold, and takes out hole time easily collapse hole, damage hole surrounding concrete, pore-forming matter too early
Measure bad；Taking out hole time delay then difficulty big, damage hole wall concrete, hole quality is difficult to ensure that, manufacture difficulty is bigger；And
The preformed hole hole wall formed smooths, and causes preformed hole surrounding concrete and the concrete being filled in preformed hole or the connection of mortar
Poor-performing, the reliability of the building that impact is assembled into by precast concrete.
Summary of the invention
The preformed hole forming hole method providing a kind of precast concrete of the present invention, is remarkably improved preformed hole pore-forming
Quality, hole wall is coarse, can strengthen precast concrete and the concrete being filled in preformed hole or the switching performance of mortar, improve whole
The reliability of body building.
As follows for reaching the scheme of above-mentioned technique effect: when making precast concrete, place in preformed hole position
Pore-forming piece, described pore-forming piece uses water-soluble dry material to make, and then casting concrete, after concrete final set or concrete
Reach predetermined strength and pore-forming piece water is washed away totally, form preformed hole；Or after concrete final set or concrete reaches pre-
Reject major part pore-forming piece after determining intensity, with water, remainder is washed away totally, form preformed hole.In order to reduce rejecting water solublity
The workload of material, increases the strength and stiffness of pore-forming piece, can be at the centrally disposed filling member of pore-forming piece, water-soluble dry material bag
Wrap up in filling member, after concrete final set or concrete reach predetermined strength extract out filling member, with water, water-soluble dry material is rushed
Clean down, form preformed hole.It is loess or collapsible loess etc. for being fabricated to the water-soluble dry material of orifice；Or it is described
Water-soluble dry material is for be formed cemented together for laxity material by water-soluble adhesives.Moisten at water-soluble dry material
It is fabricated to pore-forming piece under state, i.e. can be used for after parching making preformed hole, and can reuse.Described filling member uses steel
Or the material such as fibre reinforced composites (i.e. FRP) or timber makes, or use rubber etc. to make, water-soluble dry can be reduced
The consumption of material, increases the strength and stiffness of pore-forming piece, convenient making preformed hole.Described filling member can be solid, it is possible to
To be hollow tubular；When using hollow tubular filling member, tube wall can be provided with aperture, convenient connection water source, purges into
Orifice material.Extract filling member for convenience out, between the water-soluble dry material of filling member and parcel filling member, one layer can be arranged
Smooth sealing coat is contacted with filling member.
There is one layer of water proof material on described pore-forming piece surface, and when being so possible to prevent casting concrete, pore-forming piece surface softens.
Described pore-forming piece surface parcel thin rubber layers or other elastomeric layers；Or described pore-forming piece surface parcel glass fabric or
Other toughness materials, during to prevent casting concrete, pore-forming piece surface softens, when extracting thin rubber layers or glass fabric out simultaneously,
Matsurface can be formed on preformed hole surface.
Pore-forming piece profile is cylindricality, i.e. length direction cross section is constant；Or pore-forming piece profile be taper, i.e. length direction gradually
Diminish；Or pore-forming piece profile is that spindle, i.e. length direction are small at both ends and big in the middle；Or many waveforms, i.e. length direction are wave
Shape.The cross-sectional profile of pore-forming piece is circular or oval or triangle or square or polygon or fold-line-shaped, or other shapes,
Difform preformed hole can be formed.
Described pore-forming piece outer surface is male and fomale(M&F), described male and fomale(M&F) be corrugated surface or channel-shaped face or helicoid or point-like concavo-convex
Face.The preformed hole surface avoided the formation of smooths.
Pore-forming piece surface is coated with a layer concrete surface retarders, when surrounding concrete is the most hardened and reaches some strength
Time, the concrete contacted with pore-forming piece does not solidifies, more convenient removal pore-forming piece, it is ensured that hole quality；Removal pore-forming is washed away with water
During part, also can be formed and undisguisedly expect concrete surface.
When having two or more preformed holes in precast concrete, in order to after increasing pouring concrete or mortar it
Between connection integrity, regional area between different preformed holes can be made to be connected；By arranging projection on pore-forming piece, allow adjacent
The projection of pore-forming piece fits together, and reaches this technique effect.
Perfusion mortar in preformed hole for convenience, preformed hole connects grout hole or steam vent.
Present invention beneficial effect compared with prior art.
(1) use the forming hole method of the precast concrete preformed hole of the present invention, difform preformed hole can be formed,
Preformed hole rough surface, strengthens preformed hole surrounding concrete and the concrete being filled in preformed hole or the switching performance of mortar.
(2) forming hole method using the precast concrete preformed hole of the present invention can ensure hole quality: at concrete
After final set or concrete reaches to remove after predetermined strength pore-forming piece, hole wall concrete can be avoided damage to, keep the male and fomale(M&F) of hole wall,
Ensure hole quality.
(3) forming hole method of the precast concrete preformed hole of the present invention is dramatically different with prior art.Existing coagulation
Soil hole creating technology is it is generally required to extract pore-forming piece out before concrete final set, and hole quality is difficult to ensure that.The hole creating technology of the present invention,
Removing pore-forming piece after concrete final set, hole quality is good.The forming hole method of the present invention is simple to operate, and need not the machine of complexity
Tool equipment and facility etc..
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 schematic diagram.
Fig. 2 is the embodiment of the present invention 2 schematic diagram.
Fig. 3 is the structural representation of pore-forming piece embodiment 1 in the present invention.
Fig. 4 is the structural representation of pore-forming piece embodiment 2 in the present invention.
Fig. 5 is the structural representation of pore-forming piece embodiment 3 in the present invention.
Fig. 6 is the structural representation of pore-forming piece embodiment 4 in the present invention.
Fig. 7 is the structural representation of pore-forming piece embodiment 5 in the present invention.
Fig. 8 is the structural representation of pore-forming piece embodiment 6 in the present invention.
Fig. 9 is the structural representation of pore-forming piece embodiment 7 in the present invention.
Figure 10 is the structural representation of pore-forming piece embodiment 8 in the present invention.
Figure 11 is section B-B schematic diagram in Figure 10.
Figure 12 is C-C schematic cross-section in Figure 10.
Labelling implication in accompanying drawing is: pore-forming piece 2 filling member 3 sealing coat 4 that 1 water-soluble dry material makes becomes
Projection 6 concrete that the projection 5 pore-forming piece surface on orifice surface is oppositely arranged.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the forming hole method of the precast concrete preformed hole of the present invention is described in detail.
Forming hole method such as Fig. 1 of the precast concrete preformed hole of the present invention, when making precast concrete, in advance
Position of boxing out is positioned to orifice 1, and pore-forming piece 1 uses water-soluble dry material to make, then casting concrete 6, at concrete eventually
Solidifying rear or concrete reaches predetermined strength and washes away totally by pore-forming piece 1 water, forms preformed hole；Or after concrete 6 final set
Or concrete reaches rejecting major part pore-forming piece 1 after predetermined strength, with water, remainder is washed away totally, form preformed hole.With
It is loess or collapsible loess etc. in being fabricated to the water-soluble dry material of orifice；Or described water-soluble dry material is by water
Dissolubility cementing agent forms cemented together for laxity material (such as sand).Make under water-soluble dry material moisture state
Become pore-forming piece, i.e. can be used for after parching making preformed hole, and can reuse.
In order to reduce the workload rejecting water-soluble material, increase the strength and stiffness of pore-forming piece 1, can be in pore-forming piece 1
The heart arranges filling member 2, and such as Fig. 2, water-soluble dry material parcel filling member 2, after concrete final set or concrete reaches predetermined
First extract filling member 2 out, then with water, water-soluble dry material is washed away totally, form preformed hole.Described filling member 2 uses steel or fibre
Dimension strengthens the materials such as composite (i.e. FRP) or timber and makes, or uses rubber etc. to make.Described filling member can be solid
, it is also possible to it is hollow tubular；Tube wall can be provided with aperture, connects water source, conveniently purges pore-forming piece.Extract out for convenience
Filling member, can arrange one layer of sealing coat 3, such as Fig. 5, sealing coat between the water-soluble dry material of filling member and parcel filling member
3 is smooth with the contact surface of filling member 2.Separator is made up of the above rigid material of two panels or two panels, convenient extraction.
Described pore-forming piece profile is cylindricality, i.e. length direction cross section is constant, such as Fig. 3, Fig. 4, Fig. 5；Or pore-forming piece profile is
Taper, i.e. length direction taper into, such as Fig. 6；Or pore-forming piece profile is that spindle, i.e. length direction are small at both ends and big in the middle, as
Fig. 7；Or many waveforms, i.e. length direction are wavy, such as Fig. 8.The cross-sectional profile of pore-forming piece is circular or circular arc or ellipse
Circular or polygon or fold-line-shaped, or other shapes, can form difform preformed hole；In Fig. 3 outside the cross section of pore-forming piece
Shape is polygon.
Pore-forming piece outer surface can be male and fomale(M&F), such as corrugated surface or channel-shaped face or helicoid or point-like male and fomale(M&F) or other are non-
Plane, the preformed hole surface so formed avoids even surface, increase with after water the switching performance of concrete in the inner or mortar.
In Fig. 9, pore-forming piece 1 has projection 4.
When having two or more preformed holes in precast concrete, in order to after increasing pouring concrete or mortar it
Between connection integrity, regional area between different preformed holes can be made to be connected；By arranging projection on pore-forming piece, allow adjacent
The projection of pore-forming piece fits together, and reaches this technique effect；Such as Figure 10, Figure 11, Figure 12, two adjacent pore-forming piece 1 tables
Face is oppositely arranged projection 5, and projection 5 fits together, and after casting concrete, Concrete Filled, around pore-forming piece, takes out pore-forming
After part, regional area between adjacent preformed hole can be made to be connected.
Claims (7)
1. the forming hole method of a precast concrete preformed hole, it is characterised in that when making concrete component, at preformed hole
Position is positioned to orifice；Described pore-forming piece uses water-soluble dry material to make, or described pore-forming piece is by the filling member at center
With parcel filling member water-soluble dry material composition, described water-soluble dry material be loess or by water-soluble adhesives by pine
Dissipate the material that property material is cemented together；There are one layer of water proof material or parcel thin rubber layers or parcel in described pore-forming piece surface
Glass fabric；Then casting concrete, washes away totally by pore-forming piece water after concrete final set, forms preformed hole；Or
After concrete final set, reject major part pore-forming piece, with water, remainder is washed away totally, form preformed hole；Or at concrete
Extract filling member after final set out, with water, water-soluble dry material is washed away totally, form preformed hole.
The forming hole method of precast concrete preformed hole the most according to claim 1, it is characterised in that described pore-forming piece
Profile is cylindricality or taper or spindle or many ripples arc, and the cross-sectional profile of described pore-forming piece is circular or circular arc or ellipse
Shape or polygon or fold-line-shaped.
The forming hole method of precast concrete preformed hole the most according to claim 1, it is characterised in that described pore-forming piece
Outer surface is male and fomale(M&F), and described male and fomale(M&F) is corrugated surface or channel-shaped face or helicoid or point-like male and fomale(M&F).
The forming hole method of precast concrete preformed hole the most according to claim 1, it is characterised in that described filling member
Use steel or fibre reinforced composites or timber to make, or use rubber to make.
The forming hole method of precast concrete preformed hole the most according to claim 1, it is characterised in that described filling member
For tubulose, tube wall has aperture.
The forming hole method of precast concrete preformed hole the most according to claim 1, it is characterised in that at described pore-forming
Part surface is coated with a layer concrete surface retarders.
The forming hole method of precast concrete preformed hole the most according to claim 1, it is characterised in that when concrete structure
When having two or more preformed holes and regional area to be connected in part, described pore-forming piece is in the position corresponding with connected region
Projection, the projection of adjacent pore-forming piece is had to fit together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043133.7A CN103770201B (en) | 2014-01-29 | 2014-01-29 | A kind of forming hole method of precast concrete preformed hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043133.7A CN103770201B (en) | 2014-01-29 | 2014-01-29 | A kind of forming hole method of precast concrete preformed hole |
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| Publication Number | Publication Date |
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| CN103770201A CN103770201A (en) | 2014-05-07 |
| CN103770201B true CN103770201B (en) | 2016-09-28 |
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| CN201410043133.7A Active CN103770201B (en) | 2014-01-29 | 2014-01-29 | A kind of forming hole method of precast concrete preformed hole |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328912B (en) * | 2014-10-23 | 2016-07-20 | 苏交科集团股份有限公司 | The preparation method of a kind of steel pipe making concrete hole and using method |
| CN109457617B (en) * | 2018-11-01 | 2024-04-12 | 南京工业大学 | Spiral concrete preformed hole device and preformed hole manufacturing method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2395867Y (en) * | 1999-10-11 | 2000-09-13 | 万程 | Mandrel for producing hole cencrete structural member |
| CN100368654C (en) * | 2004-05-24 | 2008-02-13 | 大连理工大学 | Cast-in-situs hollow board tube bundle extracting method |
| US7727429B2 (en) * | 2005-03-25 | 2010-06-01 | Osram Sylvania Inc. | Core for molding a ceramic discharge vessel |
| DE102006002227A1 (en) * | 2006-01-16 | 2007-07-19 | Bernd Kuhs | Process for producing open-pored components made of metal, plastic or ceramic |
| CN101614078A (en) * | 2008-06-27 | 2009-12-30 | 赵孟杰 | From the concrete that solidifies, take out the method for steel pipe |
| CN201895353U (en) * | 2010-09-17 | 2011-07-13 | 黑龙江宇辉新型建筑材料有限公司 | Pore-forming piece for connecting precast concrete elements |
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