CN101492921B - Arch bar base and construction method - Google Patents
Arch bar base and construction method Download PDFInfo
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- CN101492921B CN101492921B CN200910037529XA CN200910037529A CN101492921B CN 101492921 B CN101492921 B CN 101492921B CN 200910037529X A CN200910037529X A CN 200910037529XA CN 200910037529 A CN200910037529 A CN 200910037529A CN 101492921 B CN101492921 B CN 101492921B
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- Prior art keywords
- arch bar
- arch
- bar
- foundation
- grade beam
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Links
- 238000010276 construction Methods 0.000 title claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract 3
- 238000000465 moulding Methods 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 11
- 230000002787 reinforcement Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention discloses an arch bar foundation the foundation plate of which comprises a plurality of arch bars with arch sections. As the arch bar shape of the arch bar foundation of the invention has better structural stiffness and better stability than the plate shape of the traditional foundation, capabilities of horizontal force resistance, slippage resistance, differential settlement reduction and the like of the foundation are improved. The invention also provides a construction method of the arch bar foundation, comprising the following steps: 1) leveling the land; 2) producing arch groves; 3) casting and pounding a cushion coat; 4) arranging an arch bar moulding board; 5) arranging a foundation beam moulding board; 6) binding the arch bar and foundation beam steel; 7) casting and pounding arch bar concrete; and 8) casting and pounding foundation beam concrete.
Description
Technical field
The present invention relates to a kind of arch bar base.The job practices that also relates to this arch bar base.
Background technology
Arch Bar Structure is the simple space thin walled construction of form, bears the space force system effect, and the transfer route of power is short, and Arch Bar Structure is mainly used in superstructure at present.Foundation structure commonly used adopts slabbed construction, and the slabbed construction structural shape is simple, but poor with Arch Bar Structure structure compared rigidity.Arch bar base stability is stronger than slabbed construction in addition, can increase basic horizontal force resistant, antiskid moves and reduce abilities such as relative settlement.
Summary of the invention
Technical problem to be solved by this invention provides a kind of arch bar base job practices, and the rigidity of the arch bar base that this method is made is better.
For this reason, the invention provides a kind of job practices of arch bar base, construction sequence comprises:
1) levelling of the land;
2) carry out the arch groove;
3) water and smash bed course;
4) install the arch bar template;
5) install the grade beam template;
6) colligation arch bar and grade beam reinforcing bar;
7) water and smash the arch bar concrete;
8) water and smash the grade beam concrete.
It is characterized in that: the arch bar radius is identical with post distance or load bearing wall spacing.
The arch bar base of the job practices manufacturing of arch bar base provided by the invention has the better rigidity of structure, and stability is better, and horizontal force resistant, the antiskid that therefore can strengthen this kind basis moves and reduce ability such as relative settlement.
Description of drawings
Fig. 1 arch bar base plan view
Fig. 2 arch bar base sectional drawing
Accompanying drawing sign: 1, arch bar, 2, foundation soil, 3, grade beam.
The specific embodiment
As shown in Figure 1 and Figure 2, arch bar base foundation slab provided by the invention is arch arch bar 1 by a plurality of cross sections and constitutes, and the junction of arch bar 1 is provided with arch bar base reinforcing bar extension 2, is cast with grade beam between the adjacent arch bar 1.
The design procedure of arch bar base provided by the invention comprises:
1) determines the arch bar radius.
Determine the arch bar radius according to post distance or load bearing wall spacing.
2) determine that arch bar chooses length.
According to the total load of building and the bearing capacity of foundation soil, try to achieve required foundation ' s bottom area, so that the preliminary outer length of choosing of determining each limit, basis, externally choose part and carry out rigidity checking, adjust according to checking computation results.It is as follows to choose the length computation formula outside minimum:
a＝3K
bR/2E
cλ
2h
3
A is that length is chosen on the basis in the formula; K
bBe the ground coefficient of subgrade reaction; R is the arch bar radius; E
cBe modulus of elasticity of concrete; λ is the rigidity characteristic coefficient of foded plate foundation, gets 0.6～0.7; H is an arch bar thickness.
3) determine the arch bar thickness of slab.
Bending resistance, shear strength according to arch bar require to select suitable thickness of slab.Thickness of slab is got the number of plies and be multiply by 3cm generally speaking, and is not less than 10cm.For the end gable, consider that counter-force is concentrated and influence such as overhanging arch bar loading characteristic, its average counter-pressure be multiply by enhancement coefficient 1.15, guarantee the trouble free service of arch bar.
4) grade beam is set.
In order to bear the uneven horizontal force that adjacent arch junction exists, reduce the relative displacement of the adjacent arch seam in stressed back, under cross wall, be provided with and connect horizontal grade beam.Elongated end socket beam should be established in the arch bar base end, strengthens basic longitudinal rigidity, bears the integrally bending effect of building on the weak soil, and bears the uneven horizontal force of handing over the ridge place, restriction arch bar crease place lateral deflection.For grade beam under vertical wall, should look the length of building and the uniformity of ground and get 35～70cm, the grade beam depth of section must satisfy the restrictive condition of section edges maximum tension stress.
5) determine basic arrangement of reinforcement.
The arch bar longitudinal reinforcement is by support moment minimum value control in the moment of flexure and first of the part of encorbelmenting.The grade beam arrangement of reinforcement need be considered the arch bar counter-force.To strengthen the arch bar arrangement of reinforcement at bigger place, aperture of door hole.
Its job practices comprises:
Embodiment 1:
1) levelling of the land.
Levelling of the land rolls with road roller when place soil is smooth back and forth to design elevation, is pressed onto till the no vestige.To carry out yard drain after the levelling of the land.
2) carry out the arch groove.
Do the arch groove on foundation soil 2, check size behind the arch Slot shaping, departure is in 10mm.Arch should reduce open-assembly time after groove finishes as far as possible, is strictly on guard against to expose to the sun and rain and steeped by water logging, avoids encircleing the groove distortion.
3) water and smash bed course.
Bed course adopts the C20 fine-stone concrete, and the fine-stone concrete cushion thickness is 50cm, and native tire scale error is eliminated as far as possible in this bed course.
4) install arch bar 1 template.
According to the total load of building and the bearing capacity of foundation soil, try to achieve required foundation ' s bottom area, so that the preliminary outer length of choosing of determining each limit, basis, externally choose part and carry out rigidity checking, adjust according to checking computation results.
It is as follows that arch bar 1 is chosen the length computation formula:
a＝3K
bR/2E
cλ
2h
3
A is that length is chosen on the basis in the formula; K
bBe the ground coefficient of subgrade reaction; R is the arch bar radius; E
cBe modulus of elasticity of concrete; λ is the rigidity characteristic coefficient of arch bar base, gets 0.6～0.7; H is an arch bar thickness.
For end gable arch bar 1, consider that counter-force is concentrated and influence such as overhanging arch bar 1 loading characteristic, its average counter-pressure be multiply by enhancement coefficient 1.15, guarantee the trouble free service of arch bar 1.
The strict control of arch bar 1 template axis, deviation must not surpass 1mm.
5) install grade beam 3 templates.
Hand over the ridge place that grade beam 3 is set at two arch bars.The friendship ridge place of arch bar 1 must be provided with grade beam 3, and grade beam 3 width are greater than wall thickness, and thickness is 30cm, and grade beam 3 is 50～70cm highly, plays the effect of distribution loading and the brick house of reinforcement globality.
Elongated end socket beam should be established in the arch bar base end, strengthens basic longitudinal rigidity, bears the integrally bending effect of building on the weak soil, and bears the uneven horizontal force of handing over the ridge place, restriction arch bar 1 crease place lateral deflection.
Grade beam 3 template deviations must not surpass 2mm.
6) colligation arch bar base reinforcing bar.
7) water and smash arch bar 1 concrete.
8) water and smash grade beam 3 concrete.
Treat that arch bar 1 solidifies more than the 12h formwork again and builds grade beam 3 concrete.
Embodiment 2:
1) levelling of the land.
Levelling of the land rolls with road roller when place soil is smooth back and forth to design elevation, is pressed onto till the no vestige.To carry out yard drain after the levelling of the land.
2) carry out the arch groove.
Do the arch groove on foundation soil 2, check size behind the arch Slot shaping, departure is in 10mm.Arch should reduce open-assembly time after groove finishes as far as possible, is strictly on guard against to expose to the sun and rain and steeped by water logging, avoids encircleing the groove distortion.
3) water and smash bed course.
Bed course adopts the C20 fine-stone concrete, and the fine-stone concrete cushion thickness is 50cm, and native tire scale error is eliminated as far as possible in this bed course.
4) place prefabricated arch bar 1.
Prefabricated arch bar 1 radius is identical with post distance or load bearing wall spacing.Prefabricated arch bar 1 thickness is got the number of plies and be multiply by 3cm, and is not less than 10cm.
According to the total load of building and the bearing capacity of foundation soil, try to achieve required foundation ' s bottom area, so that the preliminary outer length of choosing of determining each limit, basis, externally choose part and carry out rigidity checking, adjust according to checking computation results.
It is as follows that prefabricated arch bar 1 is chosen the length computation formula:
a＝3K
bR/2E
cλ
2h
3
A is that length is chosen on the basis in the formula; K
bBe the ground coefficient of subgrade reaction; R is the arch bar radius; E
cBe modulus of elasticity of concrete; λ is the rigidity characteristic coefficient of arch bar base, gets 0.6～0.7; H is an arch bar thickness.
For the prefabricated arch bar 11 of end gable, consider that counter-force is concentrated and influence such as overhanging prefabricated arch bar 11 loading characteristics, its average counter-pressure be multiply by enhancement coefficient 1.15, guarantee the trouble free service of prefabricated arch bar 1.
Prefabricated arch bar 1 termination is provided with U-shaped Φ 8 reinforcing bars, and U-shaped reinforcing bar Φ 8 length are 50cm, and the contiguous prefabricated arch bar of U-shaped reinforcing bar effectively connects by the welding of U-shaped reinforcing bar.
5) install grade beam 3 templates.
Hand over the ridge place that grade beam 3 is set at two arch bars.The friendship ridge place of arch bar 1 must be provided with grade beam 3, and grade beam 3 width are greater than wall thickness, and thickness is 30cm, and grade beam 3 is 50～70cm highly, plays the effect of distribution loading and the brick house of reinforcement globality.
Elongated end socket beam should be established in the arch bar base end, strengthens basic longitudinal rigidity, bears the integrally bending effect of building on the weak soil, and bears the uneven horizontal force of handing over the ridge place, restriction arch bar 1 crease place lateral deflection.
Grade beam 3 template deviations must not surpass 2mm.
6) water and smash grade beam 3 concrete.
Claims (4)
1. the job practices of an arch bar base, construction sequence comprises:
1) levelling of the land;
2) carry out the arch groove;
3) water and smash bed course;
4) install the arch bar template;
5) install the grade beam template;
6) colligation arch bar and grade beam reinforcing bar;
7) water and smash the arch bar concrete;
8) water and smash the grade beam concrete.
It is characterized in that: the arch bar radius is identical with post distance or load bearing wall spacing.
2. arch bar base job practices according to claim 1 is characterized in that: the grade beam height is 50～70cm, and thickness is 30cm.
3. arch bar base job practices according to claim 1 is characterized in that: at the arch bar concrete L shaped Φ 6 reinforcing bars are set, L shaped reinforcing bar Φ 6 length are 30cm, and spacing is 400cm.
4. arch bar base job practices according to claim 1 is characterized in that: prefabricated arch bar termination is provided with U-shaped Φ 8 reinforcing bars, and U-shaped reinforcing bar Φ 8 length are 50cm, and the contiguous prefabricated arch bar of U-shaped reinforcing bar effectively connects by the welding of U-shaped reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910037529XA CN101492921B (en) | 2009-02-25 | 2009-02-25 | Arch bar base and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910037529XA CN101492921B (en) | 2009-02-25 | 2009-02-25 | Arch bar base and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101492921A CN101492921A (en) | 2009-07-29 |
| CN101492921B true CN101492921B (en) | 2011-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910037529XA Expired - Fee Related CN101492921B (en) | 2009-02-25 | 2009-02-25 | Arch bar base and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101492921B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499497B (en) * | 2014-11-21 | 2017-01-18 | 朱奎 | Concrete brick-sandwiched folded plate foundation |
| CN106087944B (en) * | 2016-08-23 | 2018-08-28 | 福州市第三建筑工程公司 | A kind of construction method of ground structure applied to soft soil foundation |
-
2009
- 2009-02-25 CN CN200910037529XA patent/CN101492921B/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| 张庆辉，李继业.薄壳反拱基础在工程上的应用.中外建筑 2000年第2期.2000,(2000年第2期),第76-77页. |
| 张庆辉,李继业.薄壳反拱基础在工程上的应用.中外建筑 2000年第2期.2000,(2000年第2期),第76-77页. * |
| 贺炳庆.在软弱地基上采用筏式倒圆筒壳基础.《建筑结构学报》.1983,78-79. * |
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| Publication number | Publication date |
|---|---|
| CN101492921A (en) | 2009-07-29 |
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