CN203613536U - Variable cross-section strength prefabricated part - Google Patents
Variable cross-section strength prefabricated part Download PDFInfo
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- CN203613536U CN203613536U CN201320765065.6U CN201320765065U CN203613536U CN 203613536 U CN203613536 U CN 203613536U CN 201320765065 U CN201320765065 U CN 201320765065U CN 203613536 U CN203613536 U CN 203613536U
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- former member
- pile
- dowel
- variable cross
- prefabricated units
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 239000003351 stiffener Substances 0.000 claims description 24
- 238000005728 strengthening Methods 0.000 claims description 21
- 210000003205 muscle Anatomy 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 8
- 229920002748 Basalt fiber Polymers 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 14
- 238000004873 anchoring Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 239000003292 glue Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a variable cross-section strength prefabricated part. The variable cross-section strength prefabricated part comprises an original part and a reinforcing body arranged on the outer side of a strength reinforcing area of the original part, wherein the reinforcing body comprises steel pipes, two sets of reinforcing components and connection ribs; the steel pipes are arranged in the circumferential direction of the original part; the reinforcing components are symmetrically arranged along the cross section of the original part; the connection ribs are connected with the reinforcing components. Local reinforcement is adopted, the specification limit of an anchoring plate at the end is avoided, use is flexible, the application of the pre-stressed prefabricated part to a foundation pit support is widened, and the construction cost of projects is lowered.
Description
Technical field
The utility model belongs to civil construction project field, relates to the variable cross-section intensity prefabricated units for foundation pit supporting project and basement engineering.
Background technology
Adopt in the foundation pit supporting construction of prestressing force prefabricated units at present, conventional member has: oval stake in prestressing force prefabricated tubular pile, the square stake of prestressing force, prestressing force precast hollow square pile, the prefabricated outer rectangle of prestressing force.These common advantage is to have applied prestressing force, and stiffness of structural member is very good, and the distortion of supporting and protection structure is very little, and again because be prefabricated units, batch production is produced, and efficiency is high, reliable in quality.But because the pre-stressed longitudinal reinforced of current this member is all elongated arrangements of reinforcement, uniform section intensity, and in actual support engineering, the distribution of soil pressure changes along foundation depth, universal law is stressed all smaller along member length upper and lower, it is maximum that local pressure in the middle of member reaches, as while adopting inner support or anchor pole, at the strong point or anchor point place, the bending and shearing of soldier pile is all compared with large many of other sections, soldier pile is stressed very inhomogeneous longitudinally, so just bring current this common arrangement of reinforcement, the irrationality of uniform section intensity, in other words for the uniform section strength member of common arrangement of reinforcement, only the partial section intensity in the middle of member is fully used, and at most of section, intensity is not fully used.As by maximum weighted arrangement of reinforcement, cause waste like this, economical not.
In Construction of Basement engineering, uplift pile generally adopts bored pile and Pulling-Resistant Anchor Rod at present, and stand column pile generally adopts bored pile, and bored pile construction operation is many, speed of application is slow, cost is high; The uplift resistance of Pulling-Resistant Anchor Rod is little, and can not use in many soil properties.Because prestressing force preformed pile (pile tube and hollow square pile) can not well be connected with basement bottom board, and being connected between stake and stake do not reach resistance to plucking requirement, thereby to be prohibited use how.
Utility model content
technical problem:the utility model provides a kind of variable cross-section intensity prefabricated units that can change along with the variation of bending and shearing, and the utility model prefabricated units can be widened application and the method for attachment of above-mentioned prestressing force prefabricated units, but also can reduce construction costs.
technical scheme:variable cross-section intensity prefabricated units of the present utility model, comprise former member, are arranged on former component strength and strengthen the intensive aspect in outside, district.
In a kind of preferred version of the present utility model, intensive aspect is the steel pipe circumferentially arranging along former member.
In another kind of preferred version of the present utility model, intensive aspect comprises along the symmetrically arranged two groups of strengthening parts of former member cross section, connects the dowel of described two groups of strengthening parts.
In above-mentioned the second preferred version of the present utility model, every group of strengthening part is at least one the arc stiffener longitudinally arranging along former member, between two adjacent arc stiffeners, connected by the dowel circumferentially arranging along former member.
In above-mentioned preferred version, arc stiffener is curved plate, and dowel is reinforcing bar, between curved plate and former member, is fixedly connected with dowel, and dowel is rivet or reinforcing bar.
In above-mentioned preferred version, arc stiffener is that carbon cloth or basalt fiber cloth are made, and dowel is carbon-fibre strips or basalt fibre bar.
In the second preferred version of the present utility model, every group of strengthening part is at least one steel, angle steel or the stiffener longitudinally arranging along former member, between two adjacent strip steel, angle steel or stiffener, connected by the dowel circumferentially arranging along former member, dowel is reinforcing bar or band steel.
In the utility model, the former member prestressed pile that concrete that vertical muscle, the stirrup arranging around vertical muscle and cast fill forms of serving as reasons, prestressed pile is in pile tube, hollow square pile or outer rectangle oval.
beneficial effect:compared with traditional support unit, the utility model has following advantage:
1) flexibility is large, the scope of application expands: the cross-sectional strength of traditional precast prestressed support unit is the same along whole member length, owing to being subject to the restriction of end plate anchor slab, its specification, kind are not often a lot, bring a lot of difficulties in design selection, the utility model adopts local reinforcement, how much lack, how much mend, be not subject to termination anchor slab specification limits, very flexible, the scope of application is expanded greatly.
2) saving construction cost, reduces investment: because the stressed of support unit changes, maximum and smaller part differ several times, in the time of design, often according to maximum internal force arrangement of reinforcement, this just makes design of its support relatively conservative and unreasonable, therefore, adopt after the utility model, can saving construction cost.
3) increased use function: the utility model member can be used as uplift pile, stand column pile, and soldier pile, intensive aspect of the present utility model not only can be at the cross-sectional strength of local stiffener, but also can solve the connectivity problem between member and member, can well solve the utility model member and basement bottom board, with basement floor, connectivity problem between the members such as basement roof, therefore the utility model member has expanded the application of preformed pile, simultaneously in the time adopting arc stiffener in the utility model and steel pipe as intensive aspect, because it can be welded to connect with the beam slab arrangement of reinforcement of basement structure periphery, thereby can make double uplift pile and the engineering pile that does underground structure periphery of support unit, uplift pile and the engineering pile of basement periphery are saved, further reduce construction costs.
Accompanying drawing explanation
Fig. 1 is the interval schematic diagram that need to strengthen former member section intensity.
Fig. 2 is the schematic cross-section that adopts circular arc steel plate to strengthen annular construction member cross-sectional strength.
Fig. 3 is the schematic cross-section that adopts bar steel to strengthen annular construction member cross-sectional strength.
Fig. 4 is the schematic cross-section that adopts reinforcing bar to strengthen annular construction member cross-sectional strength.
Fig. 5 is the schematic cross-section that adopts reinforcing bar to strengthen annular construction member cross-sectional strength.
Fig. 6 is the schematic cross-section that adopts carbon fiber to strengthen annular construction member cross-sectional strength.
Fig. 7 is the schematic cross-section that adopts steel structure to strengthen hollow square pile cross-sectional strength.
In figure, have: former member 1, intensive aspect 2, vertical muscle 11, stirrup 12, concrete 13, intensity is strengthened district 14, strengthening part 21, dowel 22, dowel 23, structure glue 24.
The specific embodiment
Variable cross-section intensity prefabricated units of the present utility model comprise former member 1, because former member 1 is uniform section intensity, therefore strengthen for stressed larger section, be called intensity and strengthen district 14, definite method that intensity is strengthened district is: first obtain the moment of flexure shearing envelope diagram under various stresses, and drawing the internal force diagram that selected former member can bear, the region that goes out greatly internal force diagram for envelope diagram adds that intensive aspect needs the length of anchoring to be the scope in intensity reinforcement district.In this intensity is strengthened district's 14 scopes, set up intensive aspect 2, this intensive aspect 2 comprises along the symmetrically arranged two groups of strengthening parts 21 of former member 1 cross section, connects the dowel 22 of two groups of strengthening parts 21, and is welded on the dowel 23 of strengthening part 21 inner sides.
Above-mentioned every group of strengthening part 21 is at least one the arc stiffener longitudinally arranging along former member 1, between two adjacent arc stiffeners, connected by the dowel 22 circumferentially arranging along former member 1, dowel 22 can adopt two circular reinforcing bars to be welded on respectively (arc stiffener steel plate) on arc stiffener, also can adopt an annular or oval steel bar welding to be connected on arc stiffener.Dowel 23 is to be connected with concrete in order further to strengthen arc stiffener, can adopt U-shaped reinforcing bar or rivet and the welding of arc stiffener.
In the time that former member has completed, strengthening part 21 is the arc stiffener that carbon cloth or basalt fiber cloth are made, and dowel 22 is carbon-fibre strips or basalt fibre bar.Adopt structure glue that strengthening part 21 and dowel 22 are pasted on former member 1.
Above-mentioned every group of strengthening part 21 is except aforementioned employing curved plate, can also adopt at least one steel, angle steel or the stiffener that longitudinally arrange, between two adjacent strip steel, angle steel or stiffener, be welded to connect by the connecting reinforcement 22 circumferentially arranging along former member 1.
The prestressed pile that the concrete 13 that the stirrup 12 that former member 1 arranges for vertical muscle 11, around vertical muscle 11 and cast are filled forms, the shape of prestressed pile, at present conventional have in annular (pile tube), rectangle (square pile), hollow square pile or outer rectangle oval.
In another kind of preferred embodiment of the present utility model, intensive aspect 2 is the steel pipe circumferentially arranging along former member 1.
Variable cross-section intensity prefabricated units of the present utility model, make in accordance with the following methods:
Method one, prefabrication making step:
1) make vertical muscle 11, stirrup 12, the two is fixing by design arrangement, form reinforcing cage;
2) make intensive aspect 2: process respectively strengthening part 21 and dowel 22 by designing requirement, and both are welded together to form to intensive aspect 2;
3) by step 2) intensive aspect 2 the made intensity that is enclosed within the reinforcing cage periphery that step 1) forms strengthens in district, being welded with dowel 23, and intensive aspect 2 and reinforcing cage is fixed together;
4) assembly step 3) being formed is put into mould, to carrying out the cloth of concrete 13, closed die upper cover in mould;
5) reinforcing cage is carried out to prestressed stretch-draw and fixing, to fix reinforcing cage and form prestressing force;
6) carry out centrifugal process production and maintenance, thereby form variable cross-section intensity prefabricated units.
Method two, rear note method making step:
1) make former member 1; To indulge muscle 11 and stirrup 12 and arrange and fix by design, form reinforcing cage, put into mould, to carrying out the cloth of concrete 13 in mould, after maintenance, form former member 1;
2) be longitudinally coated with structure glue 24 by designing requirement width range in 14 outsides, reinforcement district of former member 1, then in the structure glue being coated with, paste intensive aspect 21;
3) strengthen 14 outsides, district in intensity and be coated with structure glue 24 along hoop by the width of designing requirement and spacing, and the hoop along former member 1 is pasted intensive aspect 22 in the structure glue being coated with.
Embodiment 1:(adopts curved plate to reinforce pile tube as soldier pile application example) to select diameter be 800 C class pile tube to former member, model is PHC800C130, former member moment of flexure design load is 1051kN.m, adopt two curved plates as strengthening part 21, the arc length of curved plate is 300mm, thickness is 10mm, length is 12m, dowel adopts the oval reinforcing bar of diameter 16mm, firmly weld with curved plate, dowel adopts the U-shaped reinforcing bar that diameter is 18mm, the anchorage length of U-shaped muscle is 110mm, grade length of opening of U-shaped muscle is 80mm, firmly weld (as shown in Figure 2) with curved plate.After adopting said method to strengthen, the moment of flexure design load of new structural member is 1470kN.m, has improved 40%, obtains fine economic benefit.
Embodiment 2:(adopts steel structure to reinforce hollow square pile as soldier pile application example) former member selects hollow square pile, model is HKFZ600B-400, former member moment of flexure design load is 624kN.m, adopt angle steel that 4 length are 10m as strengthening part 21, be placed in respectively 4 bights of hollow square pile, the specification of angle steel is L63x6 equal leg angle, 1459 square millimeters of two angle steel areas, dowel adopts 30x5 band iron, after angle steel welding forming, be enclosed within the peripheral and fixing of prestressed reinforcement cage, put into mould, tensioned prestressing bar, placing of concrete, start the pre-stress hollow square pile (as shown in Figure 7) that centrifuge is made into variable cross-section intensity.
Embodiment 3:(adopts steel pipe to reinforce pile tube as the application example of soldier pile, uplift pile and engineering pile) to select diameter be 800 category-B pile tube to former member, model is PHC800B130, former member moment of flexure design load is 827kN.m, adopt the steel pipe that one section of external diameter is 800 to strengthen (as shown in Figure 5), steel plate thickness is 10mm, the moment of flexure design load of strengthening district after strengthening is 1422kN.m, and moment of flexure design load has improved 70%.Steel pipe starts to arrange from pile tube upper flanges below, length is 13m, steel pipe has not only been reinforced the intensity of former member, but also can play with basement bottom board, negative one deck floor and and basement roof between connection function (adopting welding to be connected), make this play three effects of soldier pile, uplift pile and engineering pile, accomplish a multipurpose, saved along the uplift pile of basement surrounding and the engineering pile of surrounding, further save cost.
Embodiment 4:(steel pipe is reinforced as uplift pile application example at pipe pile end portion), design uplift pile length 22m, select the long pile for prestressed pipe of two joint 11m, diameter is 400, and model is PHC400B110, adopt at pipe pile end portion and set up steel pipe that one section of external diameter is 400 as the body that reinforces the connection (as shown in Figure 5), steel pipe length 0.8m, wall thickness 12mm, steel pipe is arranged on the inner side of pile for prestressed pipe end plate, and weld together with end plate, steel duct is welded with dowel and is anchored in tubular pile concrete.Between double section tube stake except two flanges directly must being welded, the another reinforcing bar that is 16 at 18 diameters of two steel pipe external applications is tied up weldering, and the method for attachment between pile tube and basement bottom board is on steel pipe surrounding sidewall, to tie up the anchor rib that 16 diameters of weldering are 20 to anchor into base plate.
Claims (8)
1. variable cross-section intensity prefabricated units, it is characterized in that, these prefabricated units comprise former member (1), are arranged on the intensive aspect (2) in outside, described former member (1) intensity reinforcement district (14), and described intensive aspect (2) is the steel pipe circumferentially arranging along former member (1).
2. variable cross-section intensity prefabricated units according to claim 1, it is characterized in that, the prestressed pile that the concrete (13) that described former member (1) is served as reasons vertical muscle (11), the stirrup (12) arranging around described vertical muscle (11) and poured into a mould filling forms, described prestressed pile is interior oval of pile tube, hollow square pile or outer rectangle.
3. variable cross-section intensity prefabricated units, it is characterized in that, these prefabricated units comprise former member (1), be arranged on described former member (1) intensity strengthens the intensive aspect (2) in outside, district (14), and described intensive aspect (2) comprises along former member (1) the symmetrically arranged two groups of strengthening parts of cross section (21), connects the dowel (22) of described two groups of strengthening parts (21).
4. variable cross-section intensity prefabricated units according to claim 3, it is characterized in that, described every group of strengthening part (21) is at least one the arc stiffener longitudinally arranging along former member (1), between two adjacent arc stiffeners, connected by the dowel (22) circumferentially arranging along former member (1).
5. variable cross-section intensity prefabricated units according to claim 4, it is characterized in that, described arc stiffener is curved plate, and dowel (22) is reinforcing bar, between described curved plate and former member (1), be fixedly connected with dowel (23), described dowel (23) is rivet or reinforcing bar.
6. variable cross-section intensity prefabricated units according to claim 4, is characterized in that, described arc stiffener is that carbon cloth or basalt fiber cloth are made, and dowel (22) is carbon-fibre strips or basalt fibre bar.
7. variable cross-section intensity prefabricated units according to claim 3, it is characterized in that, described every group of strengthening part (21) is at least one steel, angle steel or the stiffener longitudinally arranging along former member (1), between two adjacent strip steel, angle steel or stiffener, connected by the dowel (22) circumferentially arranging along former member (1), dowel (22) is reinforcing bar or band steel.
8. according to the variable cross-section intensity prefabricated units described in the arbitrary claim of claim 3 to 7, it is characterized in that, the prestressed pile that the concrete (13) that described former member (1) is served as reasons vertical muscle (11), the stirrup (12) arranging around described vertical muscle (11) and poured into a mould filling forms, described prestressed pile is interior oval of pile tube, hollow square pile or outer rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320765065.6U CN203613536U (en) | 2013-11-29 | 2013-11-29 | Variable cross-section strength prefabricated part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320765065.6U CN203613536U (en) | 2013-11-29 | 2013-11-29 | Variable cross-section strength prefabricated part |
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| Publication Number | Publication Date |
|---|---|
| CN203613536U true CN203613536U (en) | 2014-05-28 |
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| CN201320765065.6U Expired - Lifetime CN203613536U (en) | 2013-11-29 | 2013-11-29 | Variable cross-section strength prefabricated part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628476A (en) * | 2013-11-29 | 2014-03-12 | 南京东大鸿基新技术发展有限公司 | Prefabricated part with variable section strength and manufacturing method thereof |
| CN106351463A (en) * | 2016-10-21 | 2017-01-25 | 中以高新材料（深圳）有限公司 | Carbon fiber preformed reinforcement structure of existing net rack components |
-
2013
- 2013-11-29 CN CN201320765065.6U patent/CN203613536U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628476A (en) * | 2013-11-29 | 2014-03-12 | 南京东大鸿基新技术发展有限公司 | Prefabricated part with variable section strength and manufacturing method thereof |
| CN103628476B (en) * | 2013-11-29 | 2016-08-03 | 南京东大鸿基新技术发展有限公司 | A kind of variable cross-section intensity prefabricated components and preparation method thereof |
| CN106351463A (en) * | 2016-10-21 | 2017-01-25 | 中以高新材料（深圳）有限公司 | Carbon fiber preformed reinforcement structure of existing net rack components |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |