CN104818710A - Precast concrete expanding head pile tip and method for improving foundation pile bearing capacity by using same - Google Patents
Precast concrete expanding head pile tip and method for improving foundation pile bearing capacity by using same Download PDFInfo
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- CN104818710A CN104818710A CN201510147488.5A CN201510147488A CN104818710A CN 104818710 A CN104818710 A CN 104818710A CN 201510147488 A CN201510147488 A CN 201510147488A CN 104818710 A CN104818710 A CN 104818710A
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- pile
- pile top
- precast concrete
- enlarged footing
- hollow square
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Abstract
The invention discloses a precast concrete expanding head pile tip and a method for improving foundation pile bearing capacity by using the same, and belongs to the technical field of construction engineering; a combined use method of the precast concrete expanding head pile tip and a prestressed concrete pipe pile or a prestressed concrete hollow square pile is adopted; the precast concrete expanding head pile tip is arranged at the lower part, and the prestressed concrete pipe pile or the prestressed concrete hollow square pile is arranged at the upper part; the end part of the precast concrete expanding head pile tip is an inverted cone or an inverted quadrangular cone, or an inverted cone with any shape; and the section of the precast concrete expanding head pile tip is greater than the section of the prestressed concrete pipe pile or the prestressed concrete hollow square pile. The characteristics of the expanding head pile tip and a soil mass are used for improving the vertical bearing capacity of a foundation pile, improving the pile forming rate, reducing the pile exploding rate, enabling the pile settling to become easy and effectively preventing the floating phenomenon of the previously constructed foundation pile.
Description
Technical field
The invention belongs to building engineering field, particularly relating to a kind of method by using precast concrete enlarged footing pile top to improve pile bearing capacity.
Background technology
Building prefabrication concrete pile foundation engineering, now widely used is prestressed concrete pipe pile (HPC stake, see national building standard design atlas 10G409 " prestressed concrete pipe pile ") and pre-stressed concrete hollow square stake (08SG360 " pre-stressed concrete hollow square stake " is shown in HPS stake).Its computational methods are shown in " technical code for building pile foundation " (JGJ94-2008) 5.3.8 article.
The foundation pile of above two kinds of building foundation engineerings, because its quality is good, intensity is high, speed of application is fast, low cost and other advantages, is widely used in building foundation engineering.
But when prestressed concrete pipe pile and pre-stressed concrete hollow square stake are applied in Practical Project, still a lot of shortcoming is had, main manifestations is: stake end opening will consider pile-end soil plug effect coefficient, the end resistance of stake end can be lowered, and the supporting capacity of pile body has very large having more than needed, if by opening shutoff, the bearing capacity of pile tip of foundation pile can effectively can be improved; If bearing course at pile end soft rock, the infiltration of stake end opening can cause soft rock to soften, and reduces bearing capacity of pile tip (requiring in practice of construction that concrete perfusion shutoff is difficult to operation); Soil compaction effect can produce pile sinking difficulty, this just must strengthen final pressure value, and strengthens final pressure value and can increase quick-fried stake rate, and soil compaction effect also can cause floating (the gushing stake) phenomenon of previously construction foundation pile simultaneously, reduce the bearing capacity of foundation pile, cause even overall pile foundation engineering to scrap.Therefore, need badly in the middle of prior art and a kind of novel technical scheme will solve this problem.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of precast concrete enlarged footing pile top and utilize it to improve the method for pile bearing capacity, utilize the characteristic of enlarged footing pile top and the soil body, both the vertical bearing capacity of foundation pile had been improved, improve pile rate, reduce quick-fried stake rate, make pile sinking become easy simultaneously, also effectively prevent the rising phenomenon of previously construction foundation pile, reduce pile foundation engineering construction cost.
Precast concrete enlarged footing pile top, is characterized in that: comprise pile top steel end plate, pile top suspension hook, pile top concrete, pile top steel hoop, pile top reinforcing bar, pile top indulge muscle and pile top stirrup, the center of described pile top steel end plate is provided with hollow hole; Described pile top steel hoop is arranged on the concrete skin of pile top; Described pile top suspension hook is arranged in the hollow hole of pile top steel end plate; The bottom that described pile top indulges muscle is connected with pile top reinforcement welding; The end of described precast concrete enlarged footing pile top is back taper.
Utilize precast concrete enlarged footing pile top to improve the method for pile bearing capacity, it is characterized in that comprising the following steps:
Step one, choose prestressed concrete pipe pile or hollow square pile uses as pile body, precast concrete enlarged footing pile top and prestressed concrete pipe pile or hollow square pile are coaxially arranged, precast concrete enlarged footing pile top is in bottom, and prestressed concrete pipe pile or hollow square pile are on top;
Step 2, the pile top steel end plate of precast concrete enlarged footing pile top and the steel end plate of prestressed concrete pipe pile or hollow square pile are welded to connect by weld seam;
Step 3, will the precast concrete enlarged footing pile top and prestressed concrete pipe pile that are welded to connect be completed or hollow square pile carries out pile sinking to having constructed.
The cross section of described precast concrete enlarged footing pile top is greater than the cross section of described step one pile.
Pile body in described step one is the preformed pile that can be connected with precast concrete enlarged footing pile top.
By technique scheme, the present invention can bring following beneficial effect: use precast concrete enlarged footing pile top, expand the sectional area of stake end, improve the vertical bearing capacity of foundation pile; Use precast concrete enlarged footing pile top, the shutoff opening of hollow pile stake end, eliminates the impact that soil plug effect coefficient lowers foundation pile vertical bearing capacity, improves the vertical bearing capacity of foundation pile; Use precast concrete enlarged footing pile top, in the process of pile sinking, the outside of pile body can form temporary transient space, can reduce the side friction of pile body during pile sinking, and pile sinking speed is fast, can reduce final pressure value again, reduce quick-fried stake quantity, improves pile ratio and quality; Use precast concrete enlarged footing pile top, in the process of pile sinking, the outside of pile body can form temporary transient space, when there is soil compaction effect, side friction when foundation soil floats, pile body produced can be reduced, floating (the gushing stake) phenomenon of previously construction foundation pile can be reduced; Use precast concrete enlarged footing pile top, the shutoff opening of hollow pile stake end, if bearing course at pile end soft rock, avoids because the stake end soft rock caused that seeps water softens, thus avoids the reduction of possible foundation pile vertical bearing capacity; Use precast concrete enlarged footing pile top, the shutoff opening of hollow pile stake end, if bearing course at pile end soft rock, can save the operation of concrete perfusion shutoff stake core.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated:
Fig. 1 is the elevational schematic view of precast concrete enlarged footing pile top of the present invention and preformed pile combination;
Fig. 2 is A-A generalized section that the conical precast concrete enlarged footing pile top of the present invention and prestressed concrete pipe pile combine;
Fig. 3 is A-A generalized section that side's taper precast concrete enlarged footing pile top of the present invention and prestressed concrete pipe pile combine;
Fig. 4 is A-A generalized section that side's taper precast concrete enlarged footing pile top of the present invention and pre-stressed concrete hollow square stake are combined;
Fig. 5 is A-A generalized section that the conical precast concrete enlarged footing pile top of the present invention and pre-stressed concrete hollow square stake are combined;
Fig. 6 is the present invention's conical precast concrete enlarged footing pile top top view;
Fig. 7 is side's taper precast concrete enlarged footing pile top top view of the present invention;
Fig. 8 is precast concrete enlarged footing pile top side elevational view of the present invention;
Fig. 9 is precast concrete enlarged footing pile top vertical cross section figure of the present invention;
Figure 10 is the present invention's conical precast concrete enlarged footing pile top horizontal sectional drawing;
Figure 11 is side's taper precast concrete enlarged footing pile top horizontal sectional drawing of the present invention.
In figure, 1-precast concrete enlarged footing pile top, 2-prestressed concrete pipe pile or hollow square pile, 3-weld seam, 4-pile top steel end plate, 5-pile top suspension hook, 6-pile top concrete, 7-pile top steel hoop, 8-pile top reinforcing bar, 9-pile top indulge muscle, 10-pile top stirrup.
Detailed description of the invention
Precast concrete enlarged footing pile top and utilize it to improve the method for pile bearing capacity, as shown in Figure 1, adopt the method that precast concrete enlarged footing pile top 1 and prestressed concrete pipe pile or hollow square pile 2 combinationally use, precast concrete enlarged footing pile top 1 is in bottom, prestressed concrete pipe pile or hollow square pile 2, on top, are implemented to be welded to connect by weld seam 3.
As shown in Fig. 6 to Figure 11, described precast concrete enlarged footing pile top 1, indulged muscle 9, colligation pile top stirrup 10 and pile top suspension hook 5 by formwork, colligation pile top reinforcing bar 8, colligation pile top, place pile top steel end plate 4, place pile top steel hoop 7, built pile top concrete 6, after maintenance, form removal completes making; The center of described pile top steel end plate 4 is provided with hollow hole; Described pile top steel hoop 7 is arranged on the skin of pile top concrete 6; Described pile top suspension hook 5 is arranged in the hollow hole of pile top steel end plate 4; Described pile top indulges the bottom of muscle 9 and pile top reinforcing bar 8 is welded to connect; The end of described precast concrete enlarged footing pile top 1 is back taper.
Utilize precast concrete enlarged footing pile top to improve the method for pile bearing capacity, comprise the following steps,
Step one, choose prestressed concrete pipe pile or hollow square pile 2 uses as pile body, precast concrete enlarged footing pile top 1 and prestressed concrete pipe pile or hollow square pile 2 are coaxially arranged, precast concrete enlarged footing pile top 1 is in bottom, and prestressed concrete pipe pile or hollow square pile 2 are on top;
The pile top steel end plate 4 of step 2, precast concrete enlarged footing pile top 1 is welded to connect by weld seam 3 with the steel end plate of prestressed concrete pipe pile or hollow square pile 2;
Step 3, will the precast concrete enlarged footing pile top 1 and prestressed concrete pipe pile that are welded to connect be completed or hollow square pile 2 carries out pile sinking to having constructed.
As depicted in figs. 1 and 2, be the combination of conical precast concrete enlarged footing pile top 1 and prestressed concrete pipe pile 2;
As shown in figures 1 and 3, be the precast concrete enlarged footing pile top 1 of square taper and the combination of prestressed concrete pipe pile 2;
As shown in Figure 1 and Figure 4, be the precast concrete enlarged footing pile top 1 of square taper and the combination of pre-stressed concrete hollow square stake 2;
As shown in Figure 1 and Figure 5, be the combination of conical precast concrete enlarged footing pile top 1 and pre-stressed concrete hollow square stake 2.
Claims (4)
1. precast concrete enlarged footing pile top, it is characterized in that: comprise pile top steel end plate (4), pile top suspension hook (5), pile top concrete (6), pile top steel hoop (7), pile top reinforcing bar (8), pile top indulge muscle (9) and pile top stirrup (10), the center of described pile top steel end plate (4) is provided with hollow hole; Described pile top steel hoop (7) is arranged on the skin of pile top concrete (6); Described pile top suspension hook (5) is arranged in the hollow hole of pile top steel end plate (4); Described pile top indulges the bottom of muscle (9) and pile top reinforcing bar (8) is welded to connect; The end of described precast concrete enlarged footing pile top (1) is back taper.
2. utilize precast concrete enlarged footing pile top to improve the method for pile bearing capacity, it is characterized in that comprising the following steps:
Step one, choose prestressed concrete pipe pile or hollow square pile (2) uses as pile body, precast concrete enlarged footing pile top (1) and prestressed concrete pipe pile or hollow square pile (2) are coaxially arranged, precast concrete enlarged footing pile top (1) is in bottom, and prestressed concrete pipe pile or hollow square pile (2) are on top;
The pile top steel end plate (4) of step 2, precast concrete enlarged footing pile top (1) is welded to connect by weld seam (3) with the steel end plate of prestressed concrete pipe pile or hollow square pile (2);
Step 3, will the precast concrete enlarged footing pile top (1) and prestressed concrete pipe pile that are welded to connect be completed or hollow square pile (2) carries out pile sinking to having constructed.
3. the method utilizing precast concrete enlarged footing pile top to improve pile bearing capacity according to claim 2, is characterized in that: the cross section of described precast concrete enlarged footing pile top (1) is greater than the cross section of described step one pile.
4. the method utilizing precast concrete enlarged footing pile top to improve pile bearing capacity according to claim 2, is characterized in that: the pile body in described step one is the preformed pile that can be connected with precast concrete enlarged footing pile top (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510147488.5A CN104818710A (en) | 2015-03-31 | 2015-03-31 | Precast concrete expanding head pile tip and method for improving foundation pile bearing capacity by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510147488.5A CN104818710A (en) | 2015-03-31 | 2015-03-31 | Precast concrete expanding head pile tip and method for improving foundation pile bearing capacity by using same |
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| Publication Number | Publication Date |
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| CN104818710A true CN104818710A (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510147488.5A Pending CN104818710A (en) | 2015-03-31 | 2015-03-31 | Precast concrete expanding head pile tip and method for improving foundation pile bearing capacity by using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024566A (en) * | 2018-08-28 | 2018-12-18 | 毕建宏 | Interior piling and its construction method and device |
| CN112323777A (en) * | 2020-10-16 | 2021-02-05 | 中冶集团武汉勘察研究院有限公司 | Hollow precast pile for rock embedding and rock embedding construction method using precast pile |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060093081A (en) * | 2006-03-03 | 2006-08-23 | 차재선 | Pile toe shoe and hammer soil compaction method under pile toe in drilled hole to upgrade pile end bearing capacity |
| CN1970892A (en) * | 2006-12-08 | 2007-05-30 | 叶长生 | Prefabricated reinforced concrete under-reamed pile |
| CN103103977A (en) * | 2013-02-07 | 2013-05-15 | 江苏固丰管桩集团有限公司 | Partially-prestressed reinforced concrete solid square pile lower segment and manufacturing method thereof |
| CN103590399A (en) * | 2013-10-24 | 2014-02-19 | 叶香雄 | Expanded pile construction method |
| CN104196023A (en) * | 2014-09-10 | 2014-12-10 | 林基 | Precast concrete tubular pile tip with mechanical connection device and using method of precast concrete tubular pile tip |
-
2015
- 2015-03-31 CN CN201510147488.5A patent/CN104818710A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060093081A (en) * | 2006-03-03 | 2006-08-23 | 차재선 | Pile toe shoe and hammer soil compaction method under pile toe in drilled hole to upgrade pile end bearing capacity |
| CN1970892A (en) * | 2006-12-08 | 2007-05-30 | 叶长生 | Prefabricated reinforced concrete under-reamed pile |
| CN103103977A (en) * | 2013-02-07 | 2013-05-15 | 江苏固丰管桩集团有限公司 | Partially-prestressed reinforced concrete solid square pile lower segment and manufacturing method thereof |
| CN103590399A (en) * | 2013-10-24 | 2014-02-19 | 叶香雄 | Expanded pile construction method |
| CN104196023A (en) * | 2014-09-10 | 2014-12-10 | 林基 | Precast concrete tubular pile tip with mechanical connection device and using method of precast concrete tubular pile tip |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024566A (en) * | 2018-08-28 | 2018-12-18 | 毕建宏 | Interior piling and its construction method and device |
| CN112323777A (en) * | 2020-10-16 | 2021-02-05 | 中冶集团武汉勘察研究院有限公司 | Hollow precast pile for rock embedding and rock embedding construction method using precast pile |
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Application publication date: 20150805 |
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