CN101864769A - Cast-in-place X-shaped large-diameter hollow concrete pile and construction method thereof - Google Patents
Cast-in-place X-shaped large-diameter hollow concrete pile and construction method thereof Download PDFInfo
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Abstract
The invention relates to a cast-in-place X-shaped large-diameter hollow concrete pile. The cast-in-place X-shaped large-diameter hollow concrete pile is formed by driving an X-shaped hollow concrete pile die into a foundation till a designed depth in an immersed tube vibrating mode, then casting concrete into a cavity of a pile die immersed tube and vibrating and drawing the tube, wherein the X-shaped hollow concrete pile die comprises the pile die immersed tube with an X-shaped outer profile, the pile die immersed tube consists of inner and outer sleeves, the section of the outer sleeve is X-shaped and the section of the inner sleeve is circular. The invention also relates to a construction method for the concrete pile. The new pile form of the invention can improve the strength and utilization of unit materials and reduce the construction cost on the premise of ensuring the integral performance of the pile body; and the vertical bearing capacity and the horizontal bearing capacity are effectively improved by using the special-shaped effect of the cross section and the improvement effect of the pile core soil on the friction force of the pile side. The construction method for the pile is simple, has strong operability and is convenient for quality control and detection; and the single pile has high bearing capacity.
Description
Technical field
The invention belongs to Soft Ground and pile foundation technical field, relate to a kind of cast-in-place X-shaped large-diameter hollow concrete pile and job practices thereof.
Background technology
The pile foundation vertical bearing capacity is made up of pile side friction and end resistance two parts, and the performance of pile side friction seems particularly important in deep soft soil foundation.In Soft Ground engineering fields such as speedway, high-speed railway, the rigid pile composite foundation treatment technology has obtained using widely.Wherein how improving the unit materials rate of utilization of strength, improve bearing capacity of pile foundation when saving the constructional materials consumption, is one of long-term important topic of paying close attention to of researcher.
Before the present invention, Chinese patent " prefabricated X shaped steel the rib concrete pile " (patent No.: ZL01218447.0) and Chinese patent " cast-in-situ X-shaped concrete pile construction method " (number of patent application: 200710020306.3) disclose and adopt prefabricated and cast-in-place method to form the cross section abnormity stake that shape of cross section is similar English alphabet X-shaped.This type improves a side specific area by changing shape of cross section, improves the side-friction force between stake side surface and the pile peripheral earth, thereby improves bearing capacity of pile foundation under the concrete amount situations such as unit strength on concrete material utilization rate, raising.But at present often because cross section Equivalent Pile footpath, pile spacing are less relatively, the soil compaction effect when making pile foundation construction has bigger influence to the adjacent studs pile quality to this type that adopts; X-shaped open arc radius is too small, the open arc angle is excessive and in cause driving piles native disturbance of process king-pile week and the tube drawing process concave arc place stake week soil zone to go out phenomenon serious, thereby influence its practical application effect.
Chinese patent " the soft foundation composite ground base construction method for field pouring pipe pile with large diameter " (patent No.: ZL02112538.4) disclose and in ground, squeeze into internal and external casing cavity structure and cast-in-situ concrete, thereby formed the method for pouring pipe pile with large diameter in the ring domain between the inner soil body and the outside soil body.This type is the ring section with the improvement of typical circular cross section, increases the Pile Soil contact area to improve the stake side-friction force, partly recharges forms such as concrete simultaneously by pile crown, can effectively bring into play and utilize the effect of a core soil to bearing capacity of pile foundation.But this type does not consider that as yet stake side odd-shaped cross section form is to improving the effect of stake side-friction force; And because wall thickness is thinner, phenomenons such as wall unevenness, concrete casting difficulty appear easily during construction.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, the technological merit of combined cast-in-situ X-shaped concrete pile and cast-in-situ concrete large-diameter tubular pile, consider that simultaneously stake side odd-shaped cross section form and stake core soil to improving the effect of unit concrete material utilization rate and bearing capacity of pile foundation, provide a kind of cast-in-place X-shaped large-diameter hollow concrete pile new stake type and job practices thereof of economical and efficient.
A kind of cast-in-place X-shaped large-diameter hollow concrete pile, make by following method: adopt the vibration sinking tube mode that X-shaped hollow concrete pile stake mould is squeezed into ground to projected depth, fluid concrete in the cavity of stake mould immersed tube then, vibration pipe-drawing forms cast-in-place X-shaped large-diameter hollow concrete pile; Described X-shaped hollow concrete pile stake mould comprises that outline is the stake mould immersed tube of X-shaped, and stake mould immersed tube is made up of inside and outside two-layer sleeve pipe, and the outer tube cross sectional shape is an X-shaped, and the inner sleeve cross sectional shape is circular.
Vibro driver used in the present invention top is provided with vibration head, by flange screw riveted joint vibration head and X-shaped hollow concrete pile stake mould, the vibration head bottom of vibro driver is connected with the upper end of flange removably, and the flange lower end is connected with X-shaped hollow concrete pile stake mould.
Described X-shaped hollow concrete pile stake mould is by stake mould immersed tube and be connected a flap valve shoe or a precast pile tip of mould immersed tube bottom and form.
Form cavity between the described X-shaped hollow concrete pile stake mould immersed tube internal and external casing, fixedly connected between the inside and outside sleeve pipe of stake mould immersed tube, as weld short steel bar and connect into integral body; The bottom of stake mould immersed tube connects flap valve shoe or precast pile tip.
Described stake mould immersed tube is welded by the thick seamless steel pipe of 1.2～1.5cm, satisfies rigidity and requirement of strength; Outer upper is provided with the concrete charging aperture, and the outside can be provided with the sign of the observation pile sinking degree of depth.
Described flap valve shoe or precast pile tip have and the identical X-shaped of stake mould immersed tube outer contour shape.The flap valve shoe is made up of lock shaft and flap valve.
The stake internal diameter of described X-shaped large-diameter hollow concrete pile is 0.5～0.8m, outsourcing circular diameter 1.5～2.0m.Long can the reaching about 25m of whole stake.
Described X-shaped large-diameter hollow concrete pile can also form the thick concrete cover of 0.3～0.5m at pile body top pouring concrete, or in the concrete pile body of cast reinforcing cage is set, and forms cast-in-place X-shaped large-diameter hollow reinforced concrete pile.
The invention still further relates to a kind of job practices of described cast-in-place X-shaped large-diameter hollow concrete pile, its major technique step is:
(1) unwrapping wire is measured in levelling of the land, and the stake position is determined;
(2) a stake mould and a stake machine are moved on to this position after precast pile tip being put into stake position, perhaps will be in place in the pile driving position of appointment with the immersed tube of flapper pile tip, guarantee that crane gear is steady, leading truck drift angle perpendicular to the ground is not more than 1.5%, the pore-forming center is not more than 60mm with the design pile position deviation;
(3) Vibration on Start-up machine sinks to immersed tube in the soil behind 3.0～5.0m, injects a certain amount of concrete in the immersed tube cavity, is beneficial to immersed tube and prevents that underground water from charging in the immersed tube cavity;
(4) continue the Vibration on Start-up machine, and immersed tube is sink to projected depth, and every sinking 2.0m stays the 1min that shakes;
(5) in the immersed tube cavity, inject a certain amount of concrete by charging aperture;
(6) Vibration on Start-up tube drawing, on to pull out speed be 0.6-1.5m/min, and every tube drawing 1m stays the 1min that shakes, and guarantees during tube drawing that a stake mould inner concrete surface is higher than a mould bottom level 2m;
(7) ground is upwards extracted until immersed tube in repeating step (5) and (6), forms cast-in-place X-shaped large-diameter hollow concrete pile.
Further, treat cast-in-place X-shaped large-diameter hollow concrete pile pile after 24 hours, can foundation surface excavate 0.3～0.5m stake core soil and stake week soil, the excavation back at pile body top pouring concrete to form X-shaped large-diameter hollow concrete pile cover plate.
Advantage of the present invention is with effect: compare with rigid pile such as common in situ concrete pile, this new stake type can improve the unit materials rate of utilization of strength under the prerequisite of guaranteeing the pile body overall performance, reduce construction costs; Owing to the cross section outline is X-shaped, compare with traditional circular cross-section to have bigger girth, therefore have higher outer side friction; Because have stake core soil, therefore the stake inwall also has the effect of inner frictional resistance, this type utilizes the raising effect to the stake side-friction force of cross section abnormity effect and stake core soil simultaneously, improves vertical bearing capacity and level effectively to supporting capacity etc.Cast-in-place X-shaped large-diameter hollow concrete pile quality examination means are various, except can adopting traditional static load test method, low stress drive detection method, core boring sampling method, can also be by excavation stake core soil, directly the workman being transferred to an in-core and carry out quality examination, is a kind of non-concealed stake type; And this type construction technology is simple, workable, is convenient to quality control, the bearing capacity of single pile height.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a work progress schematic diagram of the present invention;
Wherein (1) is the pile vibrosinking mould, and finish for stake mould immersed tube (2), and (3) are the fluid concrete filler, vibration, tube drawing form the X-shaped large-diameter hollow concrete pile, (4) finish the pile body cast for vibration pipe-drawing, (5) excavation part pile crown stake core soil, (6) cast cover plate.
Fig. 3 is a pile body cross sectional representation of the present invention;
Fig. 4 is a precast pile tip schematic diagram of the present invention.
The specific embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Protection scope of the present invention is not limited only to the description of present embodiment.
As depicted in figs. 1 and 2, vibro driver 1 top is provided with vibration head 2, the stake mould immersed tube 5 of flange 3 screws riveted joint vibration head 2 and band scale, immersed tube 5 has rigidity and the intensity that satisfies the vibropiling requirement, and in the middle of the doughnut-shaped steel plate of outer wall X-shaped inwall circle is cavity, and immersed tube 5 bottoms connect flap valve shoe 6; Immersed tube 5 upper outside are provided with charging aperture 4.Immersed tube 5 bottoms also can connect precast pile tip 7, and as shown in Figure 4, precast pile tip 7 tops are for being connector 13, and the bottom is a bite 12.
During enforcement, shown in Fig. 2 (1), smooth place and vibro driver 1 is in place guarantees that crane gear is steady, leading truck drift angle perpendicular to the ground is not more than 1.5% earlier, and the pore-forming center is not more than 60mm with the design pile position deviation; When immersed tube is squeezed into 3.0～5.0m left and right sides, in immersed tube, inject a certain amount of concrete fill, be beneficial to immersed tube and prevent phreatic infiltration; Shown in Fig. 2 (2), the bottom is connected the pile driving position location of the band scale immersed tube 5 of flap valve shoe 6 or precast pile tip 7 in appointment, Vibration on Start-up 2 vibration downwards, make to be attached thereto flange 3, immersed tube 5 and the flap valve shoe 6 or the precast pile tip 7 that connect and to sink to together in the foundation soil and, and every sinking 2.0m stays the 1min that shakes to projected depth; Shown in Fig. 2 (3), in immersed tube 5 cavitys, annotate a certain amount of concrete fill by the charging aperture 4 of immersed tube 5 upper outside; Shown in Fig. 2 (4), a Vibration on Start-up tube drawing, on to pull out speed be 0.6-1.5m/min, and every tube drawing 1.0m stays the 1min that shakes, and upwards extracts ground until immersed tube 5, forms X-shaped large-diameter hollow concrete pile body 9 in foundation soil 11, be a core soil 10 in the pile body 9; Shown in Fig. 2 (5), cast-in-place X-shaped large-diameter hollow concrete pile pile is after 24 hours, and is in time native in a core soil and the stake week of foundation surface excavation 0.3～0.5m; Shown in Fig. 2 (6), the excavation back forms cover plate at pile body 9 top pouring concrete, finally finishes cast-in-place X-shaped large-diameter hollow concrete pile.
When as the building pile foundation scheme, generally need higher strength of the mixing pile relatively, therefore also can reinforcing cage be set and form cast-in-place X-shaped large-diameter hollow reinforced concrete pile at the concrete spouting pile body.
Claims (10)
1. cast-in-place X-shaped large-diameter hollow concrete pile, adopt the vibration sinking tube mode that X-shaped hollow concrete pile stake mould is squeezed into ground to projected depth, fluid concrete in the cavity of stake mould immersed tube then, vibration pipe-drawing forms cast-in-place X-shaped large-diameter hollow concrete pile; Described X-shaped hollow concrete pile stake mould comprises that outline is the stake mould immersed tube of X-shaped, and stake mould immersed tube is made up of inside and outside two-layer sleeve pipe, and the outer tube cross sectional shape is an X-shaped, and the inner sleeve cross sectional shape is circular.
2. cast-in-place X-shaped large-diameter hollow concrete pile according to claim 1 is characterized in that: fixedly connected between the inside and outside sleeve pipe of described stake mould immersed tube.
3. cast-in-place X-shaped large-diameter hollow concrete pile according to claim 1 is characterized in that: described stake mould immersed tube outer upper is provided with the concrete charging aperture, the sign of the arranged outside pile sinking degree of depth.
4. cast-in-place X-shaped large-diameter hollow concrete pile according to claim 1 is characterized in that: described X-shaped hollow concrete pile stake mould is by stake mould immersed tube and be connected a flap valve shoe or a precast pile tip of mould immersed tube bottom and form.
5. cast-in-place X-shaped large-diameter hollow concrete pile according to claim 4 is characterized in that: described flap valve shoe or precast pile tip have and the identical X-shaped of stake mould immersed tube outer contour shape.
6. cast-in-place X-shaped large-diameter hollow concrete pile according to claim 1 is characterized in that: the stake internal diameter of described X-shaped large-diameter hollow concrete pile is 0.5～0.8m, outsourcing circular diameter 1.5～2.0m.
7. cast-in-place X-shaped large-diameter hollow concrete pile according to claim 1 is characterized in that: form the thick concrete cover of 0.3～0.5m at pile body top pouring concrete.
8. cast-in-place X-shaped large-diameter hollow concrete pile according to claim 1 is characterized in that: in the concrete pile body of cast reinforcing cage is set.
9. the job practices of a cast-in-place X-shaped large-diameter hollow concrete pile comprises the steps:
(1) unwrapping wire is measured in levelling of the land, and the stake position is determined;
(2) precast pile tip is put into behind the stake position stake mould is in place, immersed tube that perhaps will the band flapper pile tip will be in place in the stake position of appointment, guarantee that crane gear is steady, leading truck drift angle perpendicular to the ground is not more than 1.5%, the pore-forming center with design pile position deviation and be not more than 60mm;
(3) Vibration on Start-up machine sinks to immersed tube in the soil behind 3.0～5.0m, injects a certain amount of concrete in the immersed tube cavity, is beneficial to immersed tube and prevents that underground water from charging in the immersed tube cavity;
(4) continue the Vibration on Start-up machine, and immersed tube is sink to projected depth, and every sinking 2.0m stays the 1min that shakes;
(5) in the immersed tube cavity, inject a certain amount of concrete by charging aperture;
(6) Vibration on Start-up tube drawing, on to pull out speed be 0.6-1.5m/min, and every tube drawing 1m stays the 1min that shakes, and guarantees during tube drawing that a stake mould inner concrete surface is higher than a mould bottom level 2m;
(7) ground is upwards extracted until immersed tube in repeating step (5) and (6), forms cast-in-place X-shaped large-diameter hollow concrete pile.
10. method according to claim 9 is characterized in that: described method also comprises the following steps: behind completing steps (1)～(7)
(8) treat cast-in-place X-shaped large-diameter hollow concrete pile pile after 24 hours, at foundation surface excavation 0.3～0.5m stake core soil and all soil of stake, the excavation back forms X-shaped large-diameter hollow concrete pile cover plate at pile body top pouring concrete.
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| CN2010102159654A CN101864769B (en) | 2010-07-02 | 2010-07-02 | Cast-in-place X-shaped large-diameter hollow concrete pile and construction method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102182178A (en) * | 2010-12-17 | 2011-09-14 | 陈东曙 | Solid and hollow integrated pile, pile forming device and pile forming method |
| CN102296598A (en) * | 2011-06-20 | 2011-12-28 | 河海大学 | Construction method of PCC (cast-in-place concrete large-diameter pipe) pile |
| CN102304917A (en) * | 2011-07-25 | 2012-01-04 | 山东电力工程咨询院有限公司 | Construction process of pressing-and-embedding special-shaped cast-in-place pile and equipment thereof |
| CN102400459A (en) * | 2011-11-09 | 2012-04-04 | 河南理工大学 | Cast-in-place concrete hollow five-star shaped pile with large diameter and construction method and special device thereof |
| CN102444121A (en) * | 2011-10-24 | 2012-05-09 | 河南理工大学 | Starlike in-situ concrete pile construction method |
| CN102677657A (en) * | 2011-03-11 | 2012-09-19 | 常雷 | Construction method of row cast thin-walled concrete compound pile wall and special hole forming device thereof |
| CN102979088A (en) * | 2011-09-05 | 2013-03-20 | 邹宗煊 | Bored pile for disposing foundation and construction method of bored pile |
| CN103485334A (en) * | 2013-09-18 | 2014-01-01 | 上海嘉实（集团）有限公司 | Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method |
| CN104314072A (en) * | 2014-10-28 | 2015-01-28 | 中国化学工程第一岩土工程有限公司 | Construction method of special-shaped cast-in-situ concrete pile |
| CN104790390A (en) * | 2015-05-06 | 2015-07-22 | 河海大学 | Pile mould of cast-in-place X-shaped large-diameter hollow orientated steel fiber reinforced concrete and construction method |
| CN105350555A (en) * | 2015-11-27 | 2016-02-24 | 上海长凯岩土工程有限公司 | Fast construction method of precipitation well |
| CN106836201A (en) * | 2017-01-23 | 2017-06-13 | 河海大学 | Immersed tube is into mould draining cast-in-situ steel reinforced concrete stake machine and soft soil foundation reinforcing method |
| CN109680679A (en) * | 2019-01-09 | 2019-04-26 | 河海大学 | Plain concrete pile and its construction appliance and construction method |
| CN113338271A (en) * | 2021-05-12 | 2021-09-03 | 西安理工大学 | Concrete hollow pile pouring method and device |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102182178A (en) * | 2010-12-17 | 2011-09-14 | 陈东曙 | Solid and hollow integrated pile, pile forming device and pile forming method |
| CN102677657B (en) * | 2011-03-11 | 2015-12-09 | 常雷 | Townhouse waters the construction treating methods of knot thin-walled concrete composite pile wall |
| CN102677657A (en) * | 2011-03-11 | 2012-09-19 | 常雷 | Construction method of row cast thin-walled concrete compound pile wall and special hole forming device thereof |
| CN102296598A (en) * | 2011-06-20 | 2011-12-28 | 河海大学 | Construction method of PCC (cast-in-place concrete large-diameter pipe) pile |
| CN102296598B (en) * | 2011-06-20 | 2013-05-15 | 河海大学 | Construction method of PCC (cast-in-place concrete large-diameter pipe) pile |
| CN102304917A (en) * | 2011-07-25 | 2012-01-04 | 山东电力工程咨询院有限公司 | Construction process of pressing-and-embedding special-shaped cast-in-place pile and equipment thereof |
| CN102304917B (en) * | 2011-07-25 | 2013-05-29 | 山东电力工程咨询院有限公司 | Construction process of pressing-and-embedding special-shaped cast-in-place pile and equipment thereof |
| CN102979088A (en) * | 2011-09-05 | 2013-03-20 | 邹宗煊 | Bored pile for disposing foundation and construction method of bored pile |
| CN102444121A (en) * | 2011-10-24 | 2012-05-09 | 河南理工大学 | Starlike in-situ concrete pile construction method |
| CN102400459A (en) * | 2011-11-09 | 2012-04-04 | 河南理工大学 | Cast-in-place concrete hollow five-star shaped pile with large diameter and construction method and special device thereof |
| CN103485334A (en) * | 2013-09-18 | 2014-01-01 | 上海嘉实（集团）有限公司 | Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method |
| CN103485334B (en) * | 2013-09-18 | 2015-07-15 | 上海嘉实（集团）有限公司 | Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method |
| CN104314072A (en) * | 2014-10-28 | 2015-01-28 | 中国化学工程第一岩土工程有限公司 | Construction method of special-shaped cast-in-situ concrete pile |
| CN104314072B (en) * | 2014-10-28 | 2016-08-24 | 中国化学工程第一岩土工程有限公司 | A kind of construction method of special-shaped in situ concrete pile |
| CN104790390A (en) * | 2015-05-06 | 2015-07-22 | 河海大学 | Pile mould of cast-in-place X-shaped large-diameter hollow orientated steel fiber reinforced concrete and construction method |
| CN104790390B (en) * | 2015-05-06 | 2016-08-17 | 河海大学 | The stake mould of a kind of cast-in-place X-shaped large-diameter hollow orientation steel fiber reinforced concrete stake and construction method |
| CN105350555A (en) * | 2015-11-27 | 2016-02-24 | 上海长凯岩土工程有限公司 | Fast construction method of precipitation well |
| CN106836201A (en) * | 2017-01-23 | 2017-06-13 | 河海大学 | Immersed tube is into mould draining cast-in-situ steel reinforced concrete stake machine and soft soil foundation reinforcing method |
| CN109680679A (en) * | 2019-01-09 | 2019-04-26 | 河海大学 | Plain concrete pile and its construction appliance and construction method |
| CN113338271A (en) * | 2021-05-12 | 2021-09-03 | 西安理工大学 | Concrete hollow pile pouring method and device |
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