CN104005420B - Stand alone type fixed pipe support RC T shape fin-plate type basis - Google Patents
Stand alone type fixed pipe support RC T shape fin-plate type basis Download PDFInfo
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- CN104005420B CN104005420B CN201410256450.7A CN201410256450A CN104005420B CN 104005420 B CN104005420 B CN 104005420B CN 201410256450 A CN201410256450 A CN 201410256450A CN 104005420 B CN104005420 B CN 104005420B
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Abstract
The present invention relates to a kind of free-standing fixed pipe support RC T shape fin-plate type basis, mainly solve the armored concrete flat isolated footing antiskid that in prior art, in free-standing fixed pipe support basic engineering, floor space is rectangle and move the problem lower with resistance to capsizing. the present invention is by adopting a kind of free-standing fixed pipe support RC T shape fin-plate type basis, mainly comprise reinforced concrete independent foundation (4), RC T type floor (5), length direction thickness of slab one side of T-shaped floor (5) is along width and reinforced concrete independent foundation (4) bottom connection of reinforced concrete independent foundation (4), the section of the depth direction of T-shaped floor (5) and reinforced concrete independent foundation (4) length direction is that T-shaped technical scheme has solved the problems referred to above preferably, can be used in chemical industry and the design of field of petrochemical industry pipe support.
Description
Technical field
The present invention relates to a kind of free-standing fixed pipe support RC T shape fin-plate type basis.
Background technology
Pipeline support structure, is called for short pipe frame structure, is the extraordinary structures of one of chemical industry and petrochemical industry extensive use,And free-standing fixed pipe support is the most frequently used one in various pipe support forms. Stand alone type fixed pipe support and free-standing movable pipe supportOn common support, put pipeline together, and form a complete pipe support system. Stand alone type fixed pipe support is in whole pipe support systemBe subject to the primary structure strong point of temperature action unit, thereby the internal force Main Function of system is on fixed pipe support, it is mainly stressedBe characterized as and pipeline pipe support end face vertical equity thrust (frictional force that pipeline rest contacts with pipe support end face), level in the same wayThe combination of moment of flexure (consider the moment that rest height produces, conventionally can ignore) and the vertical loading of pipeline, and major control power isThe moment of flexure that the horizontal thrust (being usually said pipe support longitudinal horizontal force) of pipe support end face and this thrust produce basis. Due toThis horizontal thrust is the whole levels in pipe temperature effect section to out-of-balance force, so the number of its horizontal thrustBe worth often greatlyr, and it is also larger to cause acting on moment of flexure on basis.
CN102535536A discloses a kind of reinforcement means that improves isolated footing and be subject to bending shear bearing capacity, belongs to structural strengthening skillArt field. Key step is: by the concrete surface dabbing of contact beam and isolated footing; In the upper surface perforate of isolated footingAnd implant the inverted U-shaped reinforcing bar around contact beam, in the perforate of post surface and implant horizontal shear reinforcement, assembling reinforcement; In dabbingConcrete surface brushing interfacial agents, formwork casting concrete, complete the reinforcing of isolated footing. Reinforcement means of the present inventionUtilize less armored concrete by former isolated footing and contact beam to be linked as entirety, form new isolated footing, improved independenceThe cutting-bearing capacity on basis, has increased reinforcement to the concrete compression district distance of dot center of making a concerted effort, and then has improved solelyVertical basic anti-bending bearing capacity.
In stand alone type fixed pipe support basic engineering, key is to need to solve the anti-of basis under horizontal thrust and Moment to inclineCover, antiskid moves this two problems. The most general way in engineering is at present to adopt the armored concrete that floor space is rectangle flatBase plinth, i.e. common isolated footing in industry and civil buildings, its cardinal principle is: by flat basis and native rubbingThe passive earth pressure composition level opposing skid force of wiping power and side of the base plate soil, both resist the level that horizontal thrust produces jointlySlippage; By the counterclockwise opposing that run-on point produces of toppling around basis of basis and the deadweight of upper overburden layer thereof and passive earth pressureMoment of flexure is resisted the clockwise overturning moment that horizontal thrust produces jointly. In this method, when horizontal thrust one timing, raising is supportedAnti-skid force and counterclockwise opposing moment of flexure are mainly decided by rectangular foundation floor space and buried depth. This has just formed current levelThrust is larger, darker this common way of larger or buried depth that do on basis, and obviously, this is that the very uneconomic engineering of one is establishedMeter base case. And if can create a kind of improved base form, by a kind of simple structure is set, directly carryThe drag of higher baseline has very positive Practical significance in engineering.
Summary of the invention
Technical problem to be solved by this invention be in prior art in free-standing fixed pipe support basic engineering floor space be rectangleArmored concrete flat isolated footing antiskid move the problem lower with resistance to capsizing, a kind of new free-standing stationary pipes is providedFrame RC T shape fin-plate type basis. This basis, for chemical industry and the design of field of petrochemical industry pipe support, has independenceThe basis antiskid of formula fixed pipe support moves the advantage higher with resistance to capsizing.
For addressing the above problem, the technical solution used in the present invention is as follows: a kind of free-standing fixed pipe support RC T shapeFin-plate type basis, mainly comprises reinforced concrete independent foundation (4), RC T type floor (5), T-shaped floor(5) length direction thickness of slab one side is along width and the reinforced concrete independent foundation of reinforced concrete independent foundation (4)(4) bottom connection, the section of the depth direction of T-shaped floor (5) and reinforced concrete independent foundation (4) length directionFor T-shaped.
In technique scheme, preferably, it is mixed that length direction thickness of slab one side of described T-shaped floor (5) is centered close to reinforcing barThe bottom centre of solidifying native isolated footing (4).
In technique scheme, preferably, length direction thickness of slab one side length and the reinforced concrete of described T-shaped floor (5)The width of soil isolated footing (4) is identical.
In technique scheme, preferably, the degree of depth of described T-shaped floor (5), thickness need be fixed according to described stand alone typeThe size of the horizontal thrust that bear on pipe support RC T shape fin-plate type basis is by calculative determination.
In technique scheme, preferably, described reinforced concrete independent foundation (4), RC T type floor (5)As a whole, when construction, integrated poured or separately cast, while separately building, ensures RC T type floor (5)In reinforcing bar anchor in reinforced concrete independent foundation (4).
In technique scheme, preferably, described T-shaped floor (5) is cuboid plate, and the thickness of plate is uniform thickness, also canThickening, need be along depth direction gradual change attenuation.
In technique scheme, preferably, the base plane of described reinforced concrete independent foundation (4) is rectangle.
The present invention, on free-standing fixed pipe support isolated footing, adopts and sets up one armored concrete floor on basis in the middle of the endStructure way, the passive earth pressure acting on floor can effectively stop basic slippage and rotation, has greatly improved single shapeThe basic antiskid of the isolated footing of formula under the flat thrust of free-standing fixed pipe support flood moves, the structure stress of antidumpingCan, armored concrete floor and the isolated footing of setting are as a whole, and whole watering together when construction, also can separately build,That establish on a kind of reasonable basis of giving full play to the technical and economy that foundation soil passive earth pressure is used for improving basic engineeringMeter scheme, floor change in size can adapt to different pipe support horizontal thrusts, conventionally in the floor degree of depth and isolated footing buried depth phaseIn same situation, its antiskid moves with resistance to capsizing and at least improves more than 1 times than single isolated footing, has obtained preferablyTechnique effect.
Brief description of the drawings
Fig. 1 is the structural representation on free-standing fixed pipe support RC T shape fin-plate type of the present invention basis;
Fig. 2 is the top view on free-standing fixed pipe support RC T shape fin-plate type of the present invention basis.
In Fig. 1, Fig. 2,1 is pipe support pillar; 2 is backfill soil; 3 is length direction thickness of slab one lateral projection of T-shaped floor 5;4 is reinforced concrete independent foundation; 5 is T-shaped floor.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Detailed description of the invention
[embodiment 1]
Free-standing fixed pipe support RC T shape fin-plate type basis institute as shown in Figure 1, Figure 2 under the support of pipelines in certain chemical plantShow, free-standing fixed pipe support RC T shape fin-plate type basis, mainly comprises reinforced concrete independent foundation 4, reinforcing barConcrete T type floor 5, length direction thickness of slab one side of T-shaped floor 5 is along the width of reinforced concrete independent foundation 4With reinforced concrete independent foundation 4 bottom connections, the depth direction of T-shaped floor 5 and reinforced concrete independent foundation 4 lengthThe section of direction is T-shaped. The base plane of reinforced concrete independent foundation 4 is rectangle, basic average thickness 1.0m. TLength direction thickness of slab one side of type floor 5 is centered close to the bottom centre of reinforced concrete independent foundation 4, and armored concrete is onlyThe buried depth on vertical basis 4 is 2.5 meters, and length is 4 meters, and width is 2.0 meters, the length of T-shaped floor 5 and armored concreteThe width of isolated footing 4 is identical, is 2.0 meters, and the web of T-shaped floor 5 is cuboid plate, and length is 2.0 meters, wide darkDegree is 2.0 meters, and the thickness of T-shaped floor 5 is 0.3 meter, reinforced concrete independent foundation 4, RC T type floor5 is as a whole, integrated poured when construction.
[comparative example]
According to the condition described in embodiment 1, free-standing fixed pipe support reinforced concrete foundation does not arrange T-shaped floor 5, independentFormula fixed pipe support reinforced concrete foundation is common isolated footing. The external force acting on basis is: T=300KN,M＝1500KNm，P＝20KN。
The antiskid ability of moving on basis is:
Fk＝Fs+Fp
Fs＝(4×2×2.5×γa+P)×μ
Fp＝2×0.5×γs×(2.52-1.52) × Kp (coefficient of passive earth pressure)
After arrangement: Fk=Fs+Fp=(20 γ a+P) × μ+4 × γ s × Kp
The resistance to capsizing on basis is:
Mk＝Ms+Mp
Ms＝(4×2×2.5×γa+P)×4÷2
Mp＝Fp×1.0÷3＝1.33×γs×Kp
After arrangement: Mk=Ms+Mp=(20 γ a+P) × 2.0+1.33 × γ s × Kp
Get constant: μ=0.30, γ a=22KN/m3，γs＝18KN/m3, Kp=1.8, various above substitution:
Fk＝267.6KN<T＝300KN
Mk＝963.1KNm<M＝1500KNm
In above formula:
T: horizontal thrust, KN;
M: overturning moment, KNm;
P: vertical load, KN;
Fs: flat isolated footing and native frictional force, KN;
Fp: the passive earth pressure of side of the base plate soil, KN;
γ a: basis and the average severe of soil), KN/m3；
μ: substrate coefficient of friction;
γ s: native severe, KN/m3；
Kp: coefficient of passive earth pressure;
Ms: the opposing moment of flexure that basic and upper overburden layer deadweight produces, KNm;
Mp: the opposing moment of flexure that passive earth pressure produces, KNm.
Can find out from above-mentioned result of calculation, adopt isolated footing without in T shape floor situation, described basis will occur significantlySlippage and toppling.
Adopt after method of the present invention:
The improvement value Δ Fk that the antiskid on basis moves ability is:
ΔFk＝2.0×0.5×γs×(4.52-2.52)×Kp＝453.6KN
The improvement value Δ Mk of the resistance to capsizing on basis is:
ΔMk＝453.6KN×2.0×2.0÷3＝907.2KNm
:
Fk’＝Fk+ΔFk＝721.2KN>T＝300KN
Mk’＝Mk+ΔMk＝1870.2KNm>M＝1500KNm
Result of calculation shows, isolated footing adds after T shape floor, and basis there will not be slippage and topples.
The basic ability having added after T shape floor improves amplitude:
Antiskid moves: Fk '/Fk=721.2/267.6=2.7 (doubly)
Antidumping: Mk '/Mk=1870.2/963.1=1.94 (doubly)
Obviously, adopt method of the present invention, in reinforced concrete independent foundation, set up floor, can significantly improve basisAntiskid moves and resistance to capsizing, has obtained good technique effect, can establish for the pipe support of chemical industry and field of petrochemical industryIn meter.
Claims (5)
1. a free-standing fixed pipe support RC T shape fin-plate type basis, mainly comprise reinforced concrete independent foundation (4),Armored concrete floor (5), length direction thickness of slab one side of floor (5) is wide along reinforced concrete independent foundation (4)Degree direction and reinforced concrete independent foundation (4) bottom connection, the depth direction of floor (5) and armored concrete independence baseThe section of plinth (4) length direction is T-shaped; Described reinforced concrete independent foundation (4), armored concrete floor (5)As a whole, when construction, integrated poured or separately cast, while separately building, ensures in armored concrete floor (5)Reinforcing bar anchors in reinforced concrete independent foundation (4); Described floor (5) is cuboid plate, and the thickness of plate is uniform thickness or edgeDepth direction gradual change attenuation.
2. free-standing fixed pipe support RC T shape fin-plate type basis according to claim 1, is characterized in that described ribLength direction thickness of slab one side of plate (5) is centered close to the bottom centre of reinforced concrete independent foundation (4).
3. free-standing fixed pipe support RC T shape fin-plate type basis according to claim 1, is characterized in that described ribThe length of plate (5) is identical with the width of reinforced concrete independent foundation (4).
4. free-standing fixed pipe support RC T shape fin-plate type basis according to claim 1, is characterized in that described ribThe degree of depth of plate (5), the water that thickness need bear according to described free-standing fixed pipe support RC T shape fin-plate type basisThe size of horizontal sliding power is by calculative determination.
5. free-standing fixed pipe support RC T shape fin-plate type basis according to claim 1, is characterized in that described steelThe base plane of reinforced concrete isolated footing (4) is rectangle.
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| CN104005420B true CN104005420B (en) | 2016-05-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191333A (en) * | 2006-11-28 | 2008-06-04 | 贵阳铝镁设计研究院 | Overturn-resisting slipping-proof foundation |
| CN101191331A (en) * | 2006-11-28 | 2008-06-04 | 贵阳铝镁设计研究院 | Slipping resisting foundation |
| KR20120030493A (en) * | 2012-02-06 | 2012-03-28 | 김정인 | Method of reinforcing existing concrete footing structure using micropile and structure thereof |
| CN102966115A (en) * | 2012-12-18 | 2013-03-13 | 湘电风能有限公司 | Foundation of wind-driven generator unit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191333A (en) * | 2006-11-28 | 2008-06-04 | 贵阳铝镁设计研究院 | Overturn-resisting slipping-proof foundation |
| CN101191331A (en) * | 2006-11-28 | 2008-06-04 | 贵阳铝镁设计研究院 | Slipping resisting foundation |
| KR20120030493A (en) * | 2012-02-06 | 2012-03-28 | 김정인 | Method of reinforcing existing concrete footing structure using micropile and structure thereof |
| CN102966115A (en) * | 2012-12-18 | 2013-03-13 | 湘电风能有限公司 | Foundation of wind-driven generator unit |
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