CN103817791A - Machining method for pre-stress concrete solid cylindrical pile - Google Patents
Machining method for pre-stress concrete solid cylindrical pile Download PDFInfo
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- CN103817791A CN103817791A CN201410072499.7A CN201410072499A CN103817791A CN 103817791 A CN103817791 A CN 103817791A CN 201410072499 A CN201410072499 A CN 201410072499A CN 103817791 A CN103817791 A CN 103817791A
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- Prior art keywords
- main muscle
- stretching force
- prestressing force
- concrete
- force
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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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
- B28B21/60—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements
- B28B21/62—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements circumferential laterally tensioned
-
- 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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
- B28B21/14—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material
- B28B21/16—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material one or more mould elements
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a machining method for a pre-stress concrete solid cylindrical pile. The machining method comprises the specific manufacturing steps in sequence: manufacturing a steel reinforcement cage; assembling; tensioning; pouring; finishing; finally, machining to obtain the pre-stress concrete solid cylindrical pile; carrying out surface treatment on the prepared pre-stress concrete solid cylindrical pile. The machining method has the advantages of simple machining process, cost saving, strong bearing capability, long service life and the like; the quality can be guaranteed and the pre-stress concrete solid cylindrical pile can be rapidly machined, so that the pre-stress concrete solid cylindrical pile can be produced and popularized in a large scale.
Description
Technical field
The present invention relates to building field, the processing method of a kind of prestressed concrete filled circles stake is provided especially.
Background technology
At present, China's precast concrete pile manufacture field, mainly contains two kinds of concrete-piles: a kind of is that the vibrate cross section of moulding is polygonal post, and another kind is the stake of cast circle or the cast polygonal pile of centrifugal forming.The method of the cast circle stake traditional fabrication concrete-pile of centrifugal forming is: penetration concrete material in female die, and then the upper mold section that closes applies prestressing force, cause quality and the steel bar quality of concrete-pile to be affected, and all there is complex forming technology in the stake of the cast of above-mentioned centrifugal forming circle, production efficiency is low, the problems such as cost of manufacture is high, and bearing capacity of pile is low.
Therefore, how the processing method of concrete-pile is improved, become people's problem demanding prompt solution.
summary of the invention
Given this, the object of the present invention is to provide the processing method of a kind of prestressed concrete filled circles stake, at least to solve the complex forming technology existing in concrete-pile processing method in the past, the problem such as production efficiency is low, and cost of manufacture is high, and bearing capacity of pile is low.
The processing method that the invention provides the stake of a kind of prestressed concrete filled circles, is characterized in that, concrete making step is as follows:
---fabrication of reinforcing cage: by the some main muscle of isometric prestressing force and spiral bar colligation or be welded into cylindrical reinforcing steel cage;
---assembling: above-mentioned cylindrical reinforcing steel cage mounted is fitted in lower mold half, anchoring locking is carried out in the two ends of the main muscle of prestressing force in cylindrical reinforcing steel cage, again upper mold half be fastened on to the top of lower mold half and upper and lower half mold is fixed to connection, and being provided with sprue gate in described upper mold half;
---stretch-draw: the main muscle of prestressing force in the die assembly assembling is applied to stretching force, and stretch-draw, to 60% ~ 80% of the main muscle tensile strength of prestressing force, is carried out anchoring;
---a cast: toward mould inside cast concrete, carry out maintenance at the sprue gate place of upper mold half after being poured, put after concrete solidifies and the demoulding;
---finishing: the prestressed concrete filled circles stake making is carried out to surface treatment and late maintaining.
Preferably, in described stretch-draw step stretching force for applying stage by stage.
Further preferably, the described detailed process that applies stage by stage stretching force is:
---apply stretching force to 10% ~ 20% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 5 ~ 10 seconds;
---apply again stretching force to 40% ~ 50% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 5 ~ 10 seconds;
---apply again stretching force to 60% ~ 80% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 10 ~ 20 seconds.
Further preferably, in described cast step, in concrete placement, unitary mould assembly inner concrete is shaken and smash, be convenient to accelerate poring rate and air-free concrete.
Further preferably, the main muscle of described prestressing force is steel bar for prestressed concrete.
The processing method of prestressed concrete filled circles provided by the invention stake, mainly contain following improvement: 1, steel reinforcement cage is assembled in lower mold half, after upper mold half and lower mold half are fastened, carry out again concrete unified cast, thereby can avoid female die cast time, the concrete material that occurs exceeding female die in matched moulds process falls down and enters two phenomenons in the joint close between half module, has also avoided the quality problems of the original intrinsic stakes such as the spillage that causes thus.2, before cast concrete, carry out the stretch-draw of the main muscle of prestressing force, can effectively avoid carrying out again the spiral bar generation displacement phenomenon that stretch-draw causes being imbedded in reinforcement in concrete cage after cast, and then guarantee that its position fixes, improve concrete solid pile service life.
The processing method of prestressed concrete filled circles provided by the invention stake, there is processing technology simple, cost-saving, bearing capacity is high, the advantages such as long service life, can fast and ensure the quality of products and process the stake of prestressed concrete filled circles, be conducive to the stake of prestressed concrete filled circles and realize large-scale production and popularization.
Accompanying drawing explanation
Fig. 1 is the structural representation of steel reinforcement cage;
Fig. 2 is the structural representation of upper and lower half mold.
The specific embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.Describe the present invention in detail below in conjunction with embodiment.
Processing method according to the stake of prestressed concrete filled circles is carried out the processing of concrete-pile, its whole process-cycle is: steel reinforcement cage processing 10 ~ 30 minutes, steel reinforcement cage, die assembly assembling 5 ~ 20 minutes, stretch-draw 3 ~ 10 minutes, pour into a mould 5 ~ 30 minutes, first maintenance 3 ~ 7 hours, puts a demoulding 5 ~ 20 minutes, finishing, later stage autoclave curing 5 ~ 12 hours, concrete steps are as follows:
First, as shown in Figure 1, by the some main muscle 1 of isometric prestressing force and spiral bar 2 colligations or be welded into cylindrical reinforcing steel cage; Again above-mentioned cylindrical reinforcing steel cage mounted is fitted in lower mold half 3, anchoring locking is carried out in the two ends of the main muscle of prestressing force in cylindrical reinforcing steel cage, again upper mold half 4 is fastened on to the top of lower mold half 3 and upper and lower half mold is fixed to connection, and in described upper mold half 4, be provided with sprue gate 41, the concrete structure of upper and lower half mold as shown in Figure 2; Then the main muscle of prestressing force in the die assembly assembling is applied to stretching force, stretch-draw, to 60% ~ 80% of the main muscle tensile strength of prestressing force, is carried out anchoring; Again by concrete from the sprue gate of upper mold half toward mould inside cast concrete, after being poured, carry out maintenance, after concrete is cured to sufficient intensity, put and the demoulding; Finally, the prestressed concrete filled circles stake making is carried out to surface treatment and late maintaining, make finished product.
Wherein, the main muscle tensile strength of prestressing force refers to the intensity level that the main muscle material of this prestressing force of national regulation should reach.
In order to improve stretch-draw effect, as the improvement of technical scheme, in stretch-draw step, stretching force, for applying stage by stage, is specially:
---apply stretching force to 10% ~ 20% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 5 ~ 10 seconds;
---apply again stretching force to 40% ~ 50% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 5 ~ 10 seconds;
---apply again stretching force to 60% ~ 80% of the main muscle tensile strength of prestressing force, stablize that stretching force is constant to be continued for 10 ~ 20 seconds and lock anchoring piece again.
By the above-mentioned tension force that applies stage by stage, can reduce to greatest extent loss of prestress.
In order to make concrete-pile quality everywhere even, in concrete placement, can unitary mould assembly inner concrete be shaken and be smash, smash and make the concrete of cast more closely knit by shake, improve the quality of concrete-pile.
Wherein, the main muscle of prestressing force can be selected steel bar for prestressed concrete, and this rod iron material is 30MnSi, and intensity is to be more than or equal to 1420MPa, far above common iron.
PHC500A100 prestressed concrete pipe pile prepared by the A type prestressed concrete filled circles stake that is 500mm by the diameter that uses method provided by the invention to be made and conventional method carries out multiple comparison test and obtains following data, in table 1.Wherein the method for test is carried out according to GB13476-2009.
Table 1 performance comparison data
| Stake type | The present invention (500A) | Prestressed concrete pipe pile (PHC500A100) | GB requirement |
| Cracking resistance moment of flexure (kN.m) | 140~170 | 120~150 | 103 |
| Ultimate bending moment (kN.m) | 220~250 | 190~220 | 155 |
| Cracking Shear Force (kN) | 390~410 | 250~260 | 239 |
| Bearing capacity (kN) | ≥4934 | ≥3158 | —— |
| Construction breakage rate (%) | 0~0.2 | 0.3~1 | —— |
Claims (5)
1. a processing method for prestressed concrete filled circles stake, is characterized in that, concrete making step is as follows:
---fabrication of reinforcing cage: by the some main muscle of isometric prestressing force and spiral bar colligation or be welded into cylindrical reinforcing steel cage;
---assembling: above-mentioned cylindrical reinforcing steel cage mounted is fitted in lower mold half, anchoring locking is carried out in the two ends of the main muscle of prestressing force in cylindrical reinforcing steel cage, again upper mold half be fastened on to the top of lower mold half and upper and lower half mold is fixed to connection, and being provided with sprue gate in described upper mold half;
---stretch-draw: the main muscle of prestressing force in the die assembly assembling is applied to stretching force, and stretch-draw, to 60% ~ 80% of the main muscle tensile strength of prestressing force, is carried out anchoring;
---cast: toward mould inside cast concrete, carry out maintenance at the sprue gate place of upper mold half after being poured, put after the complete solidifying and setting of concrete and the demoulding;
---finishing: the prestressed concrete filled circles stake making is carried out to surface treatment and late maintaining.
2. according to the processing method of prestressed concrete filled circles stake described in claim 1, it is characterized in that: in described stretch-draw step, stretching force is for applying stage by stage.
3. according to the processing method of prestressed concrete filled circles stake described in claim 2, it is characterized in that, the described detailed process that applies stage by stage stretching force is:
---apply stretching force to 10% ~ 20% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 5 ~ 10 seconds;
---apply again stretching force to 40% ~ 50% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 5 ~ 10 seconds;
---apply again stretching force to 60% ~ 80% of the main muscle tensile strength of prestressing force, stablize stretching force constant continue 10 ~ 20 seconds.
4. according to the processing method of prestressed concrete filled circles stake described in claim 1, it is characterized in that: in described cast step, in concrete placement, unitary mould assembly inner concrete is shaken and smash.
5. according to the processing method of prestressed concrete filled circles stake described in claim 1, it is characterized in that: the main muscle of described prestressing force is steel bar for prestressed concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410072499.7A CN103817791A (en) | 2014-02-28 | 2014-02-28 | Machining method for pre-stress concrete solid cylindrical pile |
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| CN201410072499.7A CN103817791A (en) | 2014-02-28 | 2014-02-28 | Machining method for pre-stress concrete solid cylindrical pile |
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| CN103817791A true CN103817791A (en) | 2014-05-28 |
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| CN201410072499.7A Pending CN103817791A (en) | 2014-02-28 | 2014-02-28 | Machining method for pre-stress concrete solid cylindrical pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058572A (en) * | 2015-08-31 | 2015-11-18 | 刘浩然 | Flue machine |
| CN113119296A (en) * | 2021-04-13 | 2021-07-16 | 内蒙古利元管涵工程有限责任公司 | Preparation method and system of partially prestressed concrete pile foundation for power transmission line tower |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0598638A (en) * | 1991-10-09 | 1993-04-20 | Times Eng:Kk | Ultra-high-bending tenacity pc pile |
| CN102373702A (en) * | 2011-08-26 | 2012-03-14 | 江苏固丰管桩集团有限公司 | Concrete circular pile and processing method thereof |
| CN102392441A (en) * | 2011-07-26 | 2012-03-28 | 杭州固华复合材料科技有限公司 | Composite crack control prestressed concrete big tube pile and manufacturing method thereof |
| CN202492836U (en) * | 2012-02-06 | 2012-10-17 | 天津建城基业集团有限公司 | Soil-retaining duplex-type reinforced tube pile |
| JP2013067024A (en) * | 2011-09-20 | 2013-04-18 | Taisei Corp | Formwork formation |
-
2014
- 2014-02-28 CN CN201410072499.7A patent/CN103817791A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0598638A (en) * | 1991-10-09 | 1993-04-20 | Times Eng:Kk | Ultra-high-bending tenacity pc pile |
| CN102392441A (en) * | 2011-07-26 | 2012-03-28 | 杭州固华复合材料科技有限公司 | Composite crack control prestressed concrete big tube pile and manufacturing method thereof |
| CN102373702A (en) * | 2011-08-26 | 2012-03-14 | 江苏固丰管桩集团有限公司 | Concrete circular pile and processing method thereof |
| JP2013067024A (en) * | 2011-09-20 | 2013-04-18 | Taisei Corp | Formwork formation |
| CN202492836U (en) * | 2012-02-06 | 2012-10-17 | 天津建城基业集团有限公司 | Soil-retaining duplex-type reinforced tube pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058572A (en) * | 2015-08-31 | 2015-11-18 | 刘浩然 | Flue machine |
| CN105058572B (en) * | 2015-08-31 | 2017-03-08 | 刘浩然 | A kind of smoke flue machine |
| CN113119296A (en) * | 2021-04-13 | 2021-07-16 | 内蒙古利元管涵工程有限责任公司 | Preparation method and system of partially prestressed concrete pile foundation for power transmission line tower |
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Application publication date: 20140528 |