CN207715900U - A kind of steel construction anchor block of the channel steel connection for return water fixed knot - Google Patents
A kind of steel construction anchor block of the channel steel connection for return water fixed knot Download PDFInfo
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- CN207715900U CN207715900U CN201721737229.9U CN201721737229U CN207715900U CN 207715900 U CN207715900 U CN 207715900U CN 201721737229 U CN201721737229 U CN 201721737229U CN 207715900 U CN207715900 U CN 207715900U
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- anchor block
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 97
- 239000010959 steel Substances 0.000 title claims abstract description 97
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 210000002421 cell wall Anatomy 0.000 claims abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 25
- 239000002689 soil Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
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- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Abstract
The utility model is related to a kind of connections of channel steel for the steel construction anchor block of return water fixed knot, including two it is disposed in parallel supply, return water fixed knot, it is described supply, return water fixed knot is that outside center is respectively provided with confession, the water supply connecting tube of return water annular slab and return water connecting tube, it is characterised in that it is described supply, return water fixed knot by it is described supply, return water annular slab along pipeline longitudinal direction both sides respectively across be welded on confession, four channel steels at the top and bottom of return water connecting tube are fixed with one；The tube body set of water supply connecting tube or return water connecting tube that each channel steel with one side cell wall reclines the side of water supply annular slab or return water annular slab and its slot bottom reclines；Across being welded on the rib connected for adding the tube body that reclines between the channel steel at the top and bottom of return water connecting tube.The utility model has the beneficial effects that both simplifying structure, hidden danger of quality is eliminated, and improve construction efficiency, improve anchor block integral strength, to ensure the secured of heat supply pipeline and stablize.
Description
Technical field
The utility model is related to a kind of Direct-Buried Heating Pipeline anchor blocks more particularly to a kind of connection of channel steel to be fixed for return water
The steel construction anchor block of section.
Background technology
Direct-Buried Heating Pipeline is that holding structure is firm, positioning is firm, indeformable in laying, it is separated by a distance will
Anchor block is set.Anchor block generally uses reinforced concrete structure, as shown in Figure 1, armored concrete anchor block A0 is will to distinguish
Connection supplies, return water heat supply pipeline two it is disposed in parallel supply, return water fixed knot is cast in reinforced concrete knoll body and formed.For,
The structural shape that return water fixed knot is embedded in anchor block pier body be supply, return water fixed knot B1, B2 be outer middle side part be respectively provided with confession,
Return water annular slab 21,22 and both ends are crossed respectively stretches out the confessions of anchor block front and back sides, return water connecting tube 11,12, for, return connection
Pipe 11,12 is welded to connect with the water supply line of laying, water return pipeline respectively as its both ends of conduit coupling.
Since anchor block constrains pipe deforming, the prodigious active force of heat supply pipeline is born in practical applications, it is this
Active force is to be transmitted to concrete pier body by fixed knot, then be transmitted to surrounding soil by concrete pier body to bear this work
With.
The major defect of existing fixed pier structure is, since the active force of heat supply pipeline is passed to admittedly by fixed knot completely
Determine pier to be offset by surrounding soil again, therefore the size of anchor block is often very big.In engineering construction, limited by site condition,
It tends not to make satisfactory anchor block by normal size.In addition, the program of common engineering, is to order pipe in advance by drawing
Part can only solve in the construction process so fixed knot can provide use, but the unpredictability of underground site condition in time,
The anchor block of conventional concrete structure is caused to be unable to normal construction；In particular, due to by limitations such as durations, often concrete also reaches
Less than curing period, the performance quality of anchor block is directly affected, eventually leading to influences the secured of heat supply pipeline and stablize.
Fixed pier structure how is improved, volume is further decreased under the premise of completing equivalent effect with existing anchor block,
To solve the problems, such as that size is undesirable in making and curing period is not achieved in concrete, become industry focus of attention.
Utility model content
The main purpose of the utility model is that in view of the above-mentioned problems, providing a kind of steel of the channel steel connection for return water fixed knot
Structure anchor block realizes the anchor block of removal armored concrete by the way that channel steel structure is rationally arranged, and both simplifies structure, eliminates quality
Hidden danger, and construction efficiency is improved, anchor block integral strength is improved, to ensure the secured of heat supply pipeline and stablize.
Technical solution adopted by the utility model to solve its technical problems is：
A kind of connection of channel steel for return water fixed knot steel construction anchor block, including two it is disposed in parallel supply, return water fixed knot,
The confession, return water fixed knot are that outside center is respectively provided with confession, the water supply connecting tube of return water annular slab and return water connecting tube, special
Sign be it is described supply, return water fixed knot by it is described supply, return water annular slab along pipeline longitudinal direction both sides respectively across being welded on
It is fixed with one for four channel steels at the top and bottom of, return water connecting tube；Each channel steel is reclined with one side cell wall for water ring
The side of shape plate or return water annular slab and its slot bottom recline the tube body set of water supply connecting tube or return water connecting tube.
Across being welded on the rib connected for adding the tube body that reclines between the channel steel at the top and bottom of return water connecting tube.
The utility model has the beneficial effects that：A kind of channel steel is provided to connect the steel construction anchor block for return water fixed knot,
It will be linked together for, return water fixed knot due to being additionally arranged steel channel connector, thus convert two pipelines to the effect of concrete
Effect between pipeline.This structure has been acted to anchor block at this when water supply line has reached high temperature, and return pipe
Road is also in normal temperature state, and anchor block stress is that water supply fixed knot longitudinally generates thrust along pipeline at this time, using channel steel as the arm of force,
Reach equilibrium state using return water fixed knot as fulcrum.Same principle, return water fixed knot longitudinally generate thrust along pipeline, are with channel steel
The arm of force, so that hydropexis section is that fulcrum reaches equilibrium state.For different heat supply pipelines, the channel steel of appropriate size is selected, you can
It realizes using the steel construction anchor block of removal armored concrete, directly buries in the soil, it can be complete by the active force of heat supply pipeline
It is mutually transmitted, is realized for the mutual balance of return water heat effect power by steel construction by fixed knot.Not only simplify structure, but also improve and apply
Work efficiency rate avoids the problem that raw steel reinforced concrete size in construction is undesirable and curing period is not achieved in concrete completely,
Hidden danger of quality is eliminated, and improves anchor block integral strength, to ensure the secured of heat supply pipeline and stablize.
Description of the drawings
Fig. 1 is existing Direct-Buried Heating Pipeline anchor block overall structure diagram；
Fig. 2 is the structural schematic diagram of steel construction anchor block provided by the utility model；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the structural schematic diagram of concrete steel structure anchor block with ribbing provided by the utility model；
Fig. 5 is the fixed knot force analysis schematic diagram of the utility model；
Fig. 6 is the structural schematic diagram of channel steel compound cross-section；
Fig. 7 is the pipeline arrangement schematic diagram that the utility model is applied in heat supplying pipeline；
Fig. 8 is the structure size schematic diagram of concrete steel structure anchor block with ribbing provided by the utility model.
In figure：
The existing armored concrete anchor blocks of A0, A1 steel construction anchor blocks, A2 concrete steel structure anchor blocks with ribbing, B1 is for hydropexis
Section, B2 return water fixed knots, C channel steels, C1 ribs, t are supplied for return water annular plate thickness, d for return water connecting tube distance between center lines, G
Water pipe, H return pipes；
11 water supply connecting tubes, 12 return water connecting tubes, 21 water supply annular slabs, 22 return water annular slabs, 3 compensators.
The utility model is described in detail below in conjunction with drawings and examples.
Specific implementation mode
Fig. 2-3 shows a kind of steel construction anchor block A1 of the channel steel connection for return water fixed knot, including two it is disposed in parallel supply,
Return water fixed knot B1, B2, the confession, return water fixed knot are that outside center is respectively provided with confession, the water supply of return water annular slab 21,22 connects
Take over 11 and return water connecting tube 12, the utility model be characterized in that it is described supply, return water fixed knot B1, B2 by it is described supply,
Return water annular slab 21,22 along pipeline longitudinal direction both sides respectively across be welded on confession, four slots at the top and bottom of return water connecting tube
Steel C is fixed with one；Each channel steel C with one side cell wall recline for 21 side of annular slab or 22 side of return water annular slab and its
Slot bottom reclines the tube body set of water supply connecting tube 11 or return water connecting tube 12.
The utility model is further characterized in that across being welded on for increasing between the channel steel C at the top and bottom of return water connecting tube
If the connected rib C1 of the tube body that reclines.Fig. 4 shows that a kind of concrete steel structure anchor block A2 with ribbing, such case are suitable for when four slots
When steel C cannot still meet steel construction anchor block local stability and require, the tube two sides that recline are connected rib.Add rib C1
The globality of steel construction anchor block can be improved.Rib C1 uses channel steel identical with channel steel C in Specific construction.
Compared with the existing fixation pier structure using armored concrete, the utility model is a kind of removal armored concrete
Steel construction anchor block, principle are as follows：
Heat distribution pipeline generally has two pipelines, a feed pipe, a return pipe.Feed pipe coolant-temperature gage is high, and when operation is first
Phase acts anchor block；Return pipe water temperature is low, and feed pipe is passed through in aqueous medium operation, user is arrived, using return pipe.This
When, the effect generated to return pipe anchor block has lagged effect of the water supply line to anchor block, and at this moment, water supply line is fixed at it
Pier position has reached stable state.Therefore, the water temperature height of two pipelines is different, and action time is different, work of the pipeline to anchor block
With also difference.
The utility model utilizes the These characteristics that act on anchor block of two pipelines, with channel steel by the fixed knot of two pipelines
Weld together, pipeline is converted to the effect between pipeline to the effect of concrete.This structure has been reached in water supply line
When high temperature, anchor block at this has been acted；And water return pipeline is also in normal temperature state.Anchor block stress is to supply water at this time
Fixed knot longitudinally generates thrust along pipeline and reaches equilibrium state using return water fixed knot as fulcrum using channel steel as the arm of force.It is same former
Reason, return water fixed knot longitudinally generates thrust along pipeline, using channel steel as the arm of force, so that hydropexis section is that fulcrum reaches equilibrium state.
Conventional thermodynamic pipeline anchor be under certain earthing state, direct-burried in the soil, as hot aqueous medium is continuous
By herein, each pipeline generates thrust to fixed knot.Each fixed knot thrust is added to concrete anchor block herein.Anchor block
Stress balance is reached with surrounding soil.
The steel construction anchor block of the utility model is directed to different heat supply pipelines, is computed the channel steel for selecting appropriate size, i.e.,
It can be achieved, using the steel construction anchor block of removal armored concrete, directly to bury in the soil, it can be complete by the active force of heat supply pipeline
Steel member is passed to offset full by fixed knot, realizes the balance of heat effect power.
Steel construction anchor block provided by the utility model, innovative point is based on the analysis to its mechanics principle.
Conventional concrete anchor block thrust meter at last according to《Urban heating direct-buried hot water pipeline technical regulation》CJJ/T81-
Section 2013 the 6.1st, calculating.Anchor block is calculated integrally by pipeline thrust T, then is checked the resistant slide of anchor block by 6.2 sections and resisted and inclined
Performance is covered, is met《Code for design of concrete structures》Requirement.
The anchor block of our this forms is not just whole T when thrust determines.When water supply line heats up, return water
Pipeline or room temperature, at this time anchor block only exist water supply line T1 thrusts.Nearly half is reduced for the value of thrust.Due to pipeline
It is thermally equivalent, when pipeline is fixed above and below, respectively bears T1/2 thrusts up and down, the 1/ of suitable conventionally calculation anchor block thrust
4。
Referring to Fig. 5-Fig. 6, thrust magnitude at heat distribution pipeline fixed knot is determined, pipeline bearing up-down force part is studied can respectively.
For calculation diagram as shown in figure 5, E points are the pads of channel steel at the fixed knot of water supply line, F points are at the fixed knot of water return pipeline
The pad of channel steel.According to the theory of Statics of Structures, channel steel bears the thrust of the T1/2 in diagram direction in E points, surrounds F
Point produces the moment of flexure of arm of force d.
With reference to specific embodiment, the channel steel specification for being specifically described the steel construction anchor block that the utility model provides calculates
Method.
Fig. 7 is the pipeline arrangement schematic diagram that steel construction anchor block is applied in heat supplying pipeline.It is the node of Efficiency in Buildings in Tianjin Area direct-burried
1.~a segment pipe 5., 1., 3., 5. node is anchor block, and 2., 4. node is compensator 3, buried depth is 1.5 meters, caliber
2DN600, pipeline center are 1 meter away from d.Distance between anchor block A2 is L1+L2=140 meters, and centre sets compensator 3.For return water temperature
130/70 DEG C of degree, pressure 1.6MPa.G indicates that water supply line, H indicate water return pipeline in figure.For the heat distribution pipeline, steel construction is solid
The computational methods for determining the channel steel specification of pier are as follows：
According to《Urban heating direct-buried hot water pipeline technical regulation》CJJ/T81-2013 is calculated for water return pipeline G, H
Fixed knot thrust；
(1.1) according to 5.1.3-1 formulas, every linear meter(lin.m.) of water supply line G is calculated by frictional force,
In formula：
K0It is soil static pressure force coefficient,
Dc is outer diameter tube；m,
σvIt is soil stress at pipe centerline；Pa,
G is pipeline weight；N/m
ρ is soil density；kg/m3
μ is soil friction coefficient；
According to 5.1.3-2 formulas,In formula：For internal friction angle；
Outer diameter tube Dc=760mm=0.76m；Pipeline weight G=4100N/m；
According to geological conditions soil friction coefficient μ=0.3；Soil internal friction angleSoil density ρ=1800kg/
m3；
K0=1-sin30 °=0.5；
According to 5.1.4-1 formulas, σ v=ρ gD, in formula：G acceleration of gravity, D-pipeline center's depth, m
σv=1800*10* (1.5+0.76/2)=33840Pa；
Each value substitution formula 5.1.3-1
Per linear meter(lin.m.) pipe friction power F=0.3 × ((1+0.5)/2 × π × 0.76 × π/4 × 0.762 33840+4100- ×
1800 × 10)=17KN/m
(1.2) it is saved according to 6.1.1, fixed knot thrusts of the calculating water supply line G in node 3
T1=F (L1-0.7*L2)
In formula：L1, L2 be node 3. fixed knot to the distance of both sides compensator 3, m；
L1≥L2；
L1=L2=70m in this example substitutes into above formula：T1=17* (70-0.7*70)=357KN；
So far, routinely concrete anchor block computational methods, fixed knot A2 thrust T1=s of the water supply line G in node 3
357KN；The fixed knot A2 thrust T2=357KN of water return pipeline H 3. in node are similarly calculated, then the anchor block thrust of node 3.
For T=T1+T2=2*357=714KN.This thrust design concrete anchor block is pressed again.
But the steel construction anchor block of the utility model is different from conventional concrete anchor block, water supply line G in node 3.
Fixed knot A2 thrusts are (2) T1/2 is calculated the B points generation moment of flexure of water return pipeline by step：
(2) the thrust that calculating water supply fixed knot is born in channel steel pad generates return water fixed knot channel steel pad curved
Square；
MB=T1/2*d
MBIt is moment of flexure, KNm；；
T1 is water supply fixed knot thrust, KN
D is for the distance between water return pipeline channel steel jointing soldering points；
T1=357KN, d=1m are substituted into, MB=T1/2*d=357/2*1=178.5KNm
According to《Code for design of steel structures》GB50017-2003 determines channel steel specification；
(3.1) according to《Code for design of steel structures》The requirement that Section 4.1 of GB50017-2003, determines the bearing strength of channel steel
Whether the requirement of bending strength is met,
(3.1.1) calculates W according to formula M/ (γ * w)≤f；
In formula：The bending strength design value of f --- steel, N/mm2；
γ --- plastic ratio of member section；
W --- net section corresponding with moment of flexure direction modulus, mm3；
The moment of flexure that M --- component is born, Nmm；M=MB；
This example γ=1.2, f=210N/mm2, M=MB=178.5KNm,
Calculate W >=M/ (γ * f)=178.5*106/ (1.2*210)=708cm3；
(3.1.2) applies trial and error procedure, and the W values according to step (2.1) determine channel steel specification, according still further to《Steel Structural Design is advised
Model》GB50017-2003 is checked：
Channel cross-section is as shown in fig. 6, be compound cross-section, wherein t=50 is fixed knot confession, return water annular plate thickness, by examination
Algorithm selects 18# channel steels, foundation《Steel Structural Design handbook》Obtain single 18# channel cross-sections characteristic：Cross sectional moment of inertia IX1=
1369.9cm4；Area of section A1=29.29cm2；Depth of section h1=18cm；The wide b of limb1=70mm.Following formula are substituted into again to test
It calculates；
Fig. 6 cross sectional moment of inertias：IX=2 [IX1+A1*(h1/2+50/2)2[the 1369.9+29.29* (9+2.5) of]=22]=
10487cm4；
Radius of gyration ix=ix=(IX/2A1)1/2=(10487/2*29.29)1/2=13.4cm；
Resistance moment WX=IX/ ix=10487/13.4=784cm3>W=708cm3；
Resistance moment WX>W then illustrates that selection channel steel specification is correct, that is, selects 18# or more channel steels that can meet specification to intensitometer
The requirement of calculation.
(3.2) it is described to determine whether selection channel steel meets《Code for design of steel structures》The monolithic stability requirement of 4.2 sections, calculates
Ratio l1/b1If the ratio is less than specification given value, that is, meet the requirements；The ratio is then added if more than specification given value
Rib.
Wherein：l1Be compression flange drift=for water return pipeline centre-to-centre spacing d=1000mm；
b1Be compression flange width=channel steel limb it is wide=70mm；
l1/b1=14.3, it is more than above-mentioned specification gives 13, therefore, in the present embodiment, as shown in figure 4, between channel steel C
It is additionally arranged the connected rib C1 of tube body that reclines；
To meet requirement of the specification to monolithic stability.
(3.3) it is described to determine whether selection channel steel meets《Code for design of steel structures》The local stability requirement of 4.3 sections, due to
Channel steel genotype steel, meets local stability requirement；
(3.4) length for selecting channel steel is determined；
According to for water return pipeline diameter, centre-to-centre spacing and convenient for the both ends development length of construction, the length of channel steel is determined.
As shown in figure 8, pipeline diameter of phi=630mm, centre-to-centre spacing d=1m in figure, extend according to construction requirement channel steel both ends
Length d1=200mm.This example channel steel length is L=1+0.63+2*0.2=2.03m.
The above is only the preferred embodiment of the utility model, is not made to the structure of the utility model any
Formal limitation.It is every according to the technical essence of the utility model to above example make simply change, equivalent variations and
Modification, is still within the scope of the technical solutions of the present invention.
Claims (2)
1. a kind of connection of channel steel is for the steel construction anchor block of return water fixed knot, including two it is disposed in parallel supply, return water fixed knot, institute
State confession, return water fixed knot is that outside center is respectively provided with confession, the water supply connecting tube of return water annular slab and return water connecting tube, feature
Be it is described supply, return water fixed knot by it is described supply, return water annular slab along pipeline longitudinal direction both sides respectively across be welded on confession,
Four channel steels at the top and bottom of return water connecting tube are fixed with one；Each channel steel is reclined water supply annular slab with one side cell wall
Or return water annular slab side and its slot bottom recline the tube body set of water supply connecting tube or return water connecting tube.
2. a kind of channel steel connection according to claim 1 is for the steel construction anchor block of return water fixed knot, it is characterised in that
Across being welded on the rib connected for adding the tube body that reclines between the channel steel at the top and bottom of return water connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721737229.9U CN207715900U (en) | 2017-12-14 | 2017-12-14 | A kind of steel construction anchor block of the channel steel connection for return water fixed knot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721737229.9U CN207715900U (en) | 2017-12-14 | 2017-12-14 | A kind of steel construction anchor block of the channel steel connection for return water fixed knot |
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| Publication Number | Publication Date |
|---|---|
| CN207715900U true CN207715900U (en) | 2018-08-10 |
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| CN201721737229.9U Withdrawn - After Issue CN207715900U (en) | 2017-12-14 | 2017-12-14 | A kind of steel construction anchor block of the channel steel connection for return water fixed knot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940105A (en) * | 2017-12-14 | 2018-04-20 | 天津市热电设计院有限公司 | Steel construction anchor block and channel steel computational methods of the channel steel connection for backwater fixed knot |
-
2017
- 2017-12-14 CN CN201721737229.9U patent/CN207715900U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940105A (en) * | 2017-12-14 | 2018-04-20 | 天津市热电设计院有限公司 | Steel construction anchor block and channel steel computational methods of the channel steel connection for backwater fixed knot |
| CN107940105B (en) * | 2017-12-14 | 2024-01-09 | 天津市热电设计院有限公司 | Steel structure fixed pier with channel steel connected with water supply and return fixed joint and channel steel calculation method |
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