CN104762961A - Ultra-high performance concrete and common concrete combined pile and construction method thereof - Google Patents
Ultra-high performance concrete and common concrete combined pile and construction method thereof Download PDFInfo
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- CN104762961A CN104762961A CN201510189665.6A CN201510189665A CN104762961A CN 104762961 A CN104762961 A CN 104762961A CN 201510189665 A CN201510189665 A CN 201510189665A CN 104762961 A CN104762961 A CN 104762961A
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Abstract
The invention relates to an ultra-high performance concrete and common concrete combined pile and a construction method thereof. The combined pile comprises an ultra-high performance concrete prefabricated barrel, a plurality of holes are formed in the side wall of the ultra-high performance concrete prefabricated barrel, the ultra-high performance concrete prefabricated barrel is placed in a pile hole, the center line of the ultra-high performance concrete prefabricated barrel coincides with that of the pile hole, common concrete is poured in the ultra-high performance concrete prefabricated barrel to form a common concrete inner core, the common concrete flows out of the holes in the outer wall of the ultra-high performance concrete prefabricated barrel from inside to outside to form a common concrete bonding outer layer, and the common concrete bonding outer layer is located between the outer wall of the ultra-high performance concrete prefabricated barrel and the inner wall of the pile hole. The ultra-high performance concrete and common concrete combined pile is simple in structure construction, novel in material and good in mechanical property, the pile diameter can be reduced, manufacturing cost can be saved, the problems happening to pile foundation construction are effectively solved, the quality and durability of the pile are improved, the good mechanical property and economic benefits are achieved, and the quite wide application prospect is achieved.
Description
Technical field
The present invention relates to technical field of civil, especially a kind of ultra-high performance concrete and ordinary concrete compound pile and construction method thereof.
Background technology
Bored concrete pile foundation, due to the advantage such as bearing capacity is high, settling amount is little and anti-seismic performance is good, is widely used in isostructural basis at highrise building, bridge.Patten bearing capacity is large, general stake cross section is larger, and due to underground environment complexity, to the more high reason of construction process requirement, often occur not solidifying between concrete pile body and basement rock, pile concrete is solidifying, rock slag deposits stratification, there are the broken pile quality problems such as empty body in pile body, pile foundation belongs to concealed work, and quality problems not easily find, check difficulty and also costly.Pile foundation also can be subject to the erosion of soil in acid ground, affects the safety of structure.The main cause of these problems is caused to be complicated hydrogeological conditions in stake holes, construction quality is difficult to control, and common steel concrete (RC) intensity is low, poor toughness, porosity are high, easily occurs damaging under load and environmental activity, reduce application life.
Ultra-high performance concrete (UHPC) take fine sand as aggregate, mix a large amount of silicon ash and wait mineral admixture, high efficiency water reducing agent and micro steel fiber, a kind of high strength, high-durability, high tenacity, the closely knit concrete material that are formed, compared with common concrete, eliminate coarse aggregate (stone), be the high performance concrete that fines dense material and fiber reinforced material are composited, compressive strength and tensile strength all will exceed much than common concrete.Utilize UHPC pressure-bearing can reduce the size of pile foundation, save material and construction workload, can obtain good economic effect, the functional performance that UHPC is good simultaneously can improve the application life of pile foundation greatly.Although UHPC performance is fine, cost is higher than common concrete a lot, if pile foundation all uses UHPC, then very uneconomical.
Summary of the invention
The deficiency that current deposited reinforced concrete pile cross section is comparatively large in order to overcome, construction quality easily goes wrong, the object of the present invention is to provide a kind of structure simple structure, construct easy and convenient, material is novel and mechanical property and the good ultra-high performance concrete of economic benefit and ordinary concrete compound pile and construction method thereof.
To achieve these goals, a technical scheme of the present invention is: a kind of ultra-high performance concrete and ordinary concrete compound pile, comprise the prefabricated cylinder of ultra-high performance concrete, described ultra-high performance concrete prefabricated cylinder sidewall offers multiple hole, the prefabricated cylinder of described ultra-high performance concrete is positioned in stake holes and the center line of the two coincides, ordinary concrete has been built to form ordinary concrete inner core in the prefabricated cylinder of described ultra-high performance concrete, the prefabricated drum outer wall of described ultra-high performance concrete flows out ordinary concrete to form ordinary concrete bonding skin from inside to outside by its hole, described ordinary concrete bonding is outer between the prefabricated drum outer wall of ultra-high performance concrete and stake holes inwall.
Further, the prefabricated drum outer wall of described ultra-high performance concrete is to the distance 5 ~ 10cm less of the radius of stake holes in the center of circle.
Further, the diameter of described hole is 5 ~ 10cm.
Further, configuration reinforcement or be not configured with reinforcing bar in the prefabricated cylinder sidewall of described ultra-high performance concrete.
Further, the prefabricated cylinder of described ultra-high performance concrete is superposed by multiple prefabricated subsection and forms.
Further, described ordinary concrete inner core does not configure reinforcing cage.
Further, described ordinary concrete bonding skin does not configure reinforcing cage.
To achieve these goals, another technical scheme of the present invention is: the construction method of a kind of ultra-high performance concrete and ordinary concrete compound pile, carries out according to the following steps:
(1) make the prefabricated cylinder of ultra-high performance concrete according to designing requirement, and offer multiple hole on ultra-high performance concrete prefabricated cylinder sidewall;
(2) adopt artificial or mechanical operating type to make stake holes, prefabricated for ultra-high performance concrete cylinder is positioned in stake holes, and the center line of the prefabricated cylinder of ultra-high performance concrete and the center line of stake holes are coincided;
(3) in the prefabricated cylinder of ultra-high performance concrete, perfusion ordinary concrete is to form ordinary concrete inner core, and part ordinary concrete flows to the prefabricated cylinder of ultra-high performance concrete outer to form ordinary concrete bonding from hole in filling process simultaneously;
(4) adopt normal maintenance, form compound pile.
Further, in step (1), the prefabricated drum outer wall of described ultra-high performance concrete is to the distance 5 ~ 10cm less of the design radial of compound pile in the center of circle.
Further, the diameter of described hole is 5 ~ 10cm.
Compared with prior art, the present invention has following beneficial effect: this ultra-high performance concrete and ordinary concrete compound pile simple structure, novel and the good mechanical properties of material, utilize the high strength of UHPC, high tenacity and the advantage such as corrosion-resistant reduce the sectional dimension of pile foundation, concreting in prefabricated cylinder is utilized to ensure the pouring quality of pile foundation, improve the durability of pile foundation, there is cavity in the current ordinary reinforced concrete stake of effective solution, interlayer even broken pile and by the problem such as soil erosion damage, and be combined with ordinary concrete, saving construction cost, obtain good mechanical property and economic benefit, there is application prospect widely.
Accompanying drawing explanation
Fig. 1 is the front view of the embodiment of the present invention.
Fig. 2 is the perforate schematic diagram of the prefabricated cylinder of ultra-high performance concrete.
In figure: the prefabricated cylinder of 1-ultra-high performance concrete, 2-hole, 3-ordinary concrete inner core, 4-ordinary concrete bonding is outer, 5-stake holes inwall, 6-soil.
Detailed description of the invention
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing, be described in detail below.
As shown in Figure 1 and 2, a kind of ultra-high performance concrete and ordinary concrete compound pile, comprise the prefabricated cylinder 1 of ultra-high performance concrete, described ultra-high performance concrete prefabricated cylinder 1 sidewall offers the hole 2 of multiple uniform array distribution, the prefabricated cylinder 1 of described ultra-high performance concrete is positioned in stake holes and the center line of the two coincides, ordinary concrete has been built to form ordinary concrete inner core 3 in the prefabricated cylinder 1 of described ultra-high performance concrete, described ultra-high performance concrete prefabricated cylinder 1 outer wall flows out ordinary concrete to form ordinary concrete bonding outer 4 from inside to outside by its hole 2, described ordinary concrete bonding outer 4 is between ultra-high performance concrete prefabricated cylinder 1 outer wall and stake holes inwall 5.
In the present embodiment, the ultra-high performance concrete (Ultra-High Performance Concrete, UHPC) for making the prefabricated cylinder of ultra-high performance concrete 1 refers to high strength, high-durability, high tenacity, closely knit concrete material.Can configuration reinforcement in described ultra-high performance concrete prefabricated cylinder 1 sidewall, also can not be configured with reinforcing bar.
In the present embodiment, described ultra-high performance concrete prefabricated cylinder 1 outer wall is to the distance 5 ~ 10cm less of the radius of stake holes (or compound pile) in the center of circle, and namely the thickness of ordinary concrete bonding outer 4 is 5 ~ 10cm.The wall thickness of the prefabricated cylinder 1 of described ultra-high performance concrete is determined according to designing and calculating, and the diameter of described hole 2 is 5 ~ 10cm.
In the present embodiment, the prefabricated cylinder of described ultra-high performance concrete 1 can be segmented prefabricated, and namely the prefabricated cylinder of ultra-high performance concrete 1 is superposed by multiple prefabricated subsection and forms.
In the present embodiment, described ordinary concrete inner core 3 and ordinary concrete bonding outer 4 all do not configure reinforcing cage.
As shown in Figure 1 and 2, the construction method of a kind of ultra-high performance concrete and ordinary concrete compound pile, carry out according to the following steps:
(1) at the construction field (site), make the prefabricated cylinder 1 of ultra-high performance concrete in advance according to designing requirement, and offer multiple equally distributed hole 2 on ultra-high performance concrete prefabricated cylinder 1 sidewall;
(2) soil 6 at the construction field (site), adopts artificial or mechanical operating type to make stake holes, prefabricated for ultra-high performance concrete cylinder 1 is positioned over the tram in stake holes, and the prefabricated center line of cylinder 1 of ultra-high performance concrete and the center line of stake holes are coincided;
(3) in the prefabricated cylinder 1 of ultra-high performance concrete, pour into ordinary concrete to form ordinary concrete inner core 3, part ordinary concrete flows to the prefabricated cylinder 1 of ultra-high performance concrete from hole 2 to form ordinary concrete bonding outer 4 in filling process simultaneously;
(4) adopt normal maintenance, form compound pile.
In the present embodiment, in step (1), described ultra-high performance concrete prefabricated cylinder 1 outer wall is to the distance in the center of circle than design radial (the i.e. stake holes radius) little 5 ~ 10cm of compound pile, and the diameter of described hole 2 is 5 ~ 10cm.
The present invention is not limited to above-mentioned preferred forms, and anyone can draw other various forms of ultra-high performance concretes and ordinary concrete compound pile and construction method thereof under enlightenment of the present invention.All equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. a ultra-high performance concrete and ordinary concrete compound pile, it is characterized in that: comprise the prefabricated cylinder of ultra-high performance concrete, described ultra-high performance concrete prefabricated cylinder sidewall offers multiple hole, the prefabricated cylinder of described ultra-high performance concrete is positioned in stake holes and the center line of the two coincides, ordinary concrete has been built to form ordinary concrete inner core in the prefabricated cylinder of described ultra-high performance concrete, the prefabricated drum outer wall of described ultra-high performance concrete flows out ordinary concrete to form ordinary concrete bonding skin from inside to outside by its hole, described ordinary concrete bonding is outer between the prefabricated drum outer wall of ultra-high performance concrete and stake holes inwall.
2. ultra-high performance concrete according to claim 1 and ordinary concrete compound pile, is characterized in that: the prefabricated drum outer wall of described ultra-high performance concrete is to the distance 5 ~ 10cm less of the radius of stake holes in the center of circle.
3. ultra-high performance concrete according to claim 1 and 2 and ordinary concrete compound pile, is characterized in that: the diameter of described hole is 5 ~ 10cm.
4. ultra-high performance concrete according to claim 1 and ordinary concrete compound pile, is characterized in that: configuration reinforcement or be not configured with reinforcing bar in the prefabricated cylinder sidewall of described ultra-high performance concrete.
5. the ultra-high performance concrete according to claim 1 or 4 and ordinary concrete compound pile, is characterized in that: the prefabricated cylinder of described ultra-high performance concrete is superposed by multiple prefabricated subsection and forms.
6. ultra-high performance concrete according to claim 1 and ordinary concrete compound pile, is characterized in that: described ordinary concrete inner core does not configure reinforcing cage.
7. the ultra-high performance concrete according to claim 1 or 6 and ordinary concrete compound pile, is characterized in that: described ordinary concrete bonding skin does not configure reinforcing cage.
8. a construction method for ultra-high performance concrete and ordinary concrete compound pile, is characterized in that, carries out according to the following steps:
(1) make the prefabricated cylinder of ultra-high performance concrete according to designing requirement, and offer multiple hole on ultra-high performance concrete prefabricated cylinder sidewall;
(2) adopt artificial or mechanical operating type to make stake holes, prefabricated for ultra-high performance concrete cylinder is positioned in stake holes, and the center line of the prefabricated cylinder of ultra-high performance concrete and the center line of stake holes are coincided;
(3) in the prefabricated cylinder of ultra-high performance concrete, perfusion ordinary concrete is to form ordinary concrete inner core, and part ordinary concrete flows to the prefabricated cylinder of ultra-high performance concrete outer to form ordinary concrete bonding from hole in filling process simultaneously;
(4) adopt normal maintenance, form compound pile.
9. the construction method of ultra-high performance concrete according to claim 8 and ordinary concrete compound pile, is characterized in that: in step (1), and the prefabricated drum outer wall of described ultra-high performance concrete is to the distance 5 ~ 10cm less of the design radial of compound pile in the center of circle.
10. the construction method of ultra-high performance concrete according to claim 8 or claim 9 and ordinary concrete compound pile, is characterized in that: the diameter of described hole is 5 ~ 10cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510189665.6A CN104762961B (en) | 2015-04-21 | 2015-04-21 | A kind of ultra-high performance concrete and ordinary concrete compound pile and construction method thereof |
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| CN201510189665.6A CN104762961B (en) | 2015-04-21 | 2015-04-21 | A kind of ultra-high performance concrete and ordinary concrete compound pile and construction method thereof |
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| CN104762961A true CN104762961A (en) | 2015-07-08 |
| CN104762961B CN104762961B (en) | 2016-03-30 |
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| CN107268609A (en) * | 2017-06-06 | 2017-10-20 | 哈尔滨工业大学深圳研究生院 | A kind of double-decker damping stake and its construction method |
| CN110924424A (en) * | 2019-10-29 | 2020-03-27 | 国家电网有限公司 | UHPC-NC combined pile foundation for power transmission tower in saline-alkali area and construction method |
| CN111519642A (en) * | 2020-04-22 | 2020-08-11 | 广东裕基建筑工程有限公司 | Pile foundation structure and construction method thereof |
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| CN110924424A (en) * | 2019-10-29 | 2020-03-27 | 国家电网有限公司 | UHPC-NC combined pile foundation for power transmission tower in saline-alkali area and construction method |
| CN111519642A (en) * | 2020-04-22 | 2020-08-11 | 广东裕基建筑工程有限公司 | Pile foundation structure and construction method thereof |
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| CN104762961B (en) | 2016-03-30 |
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