CN101691753B - Pile mould for PCC pile and construction method for overlong PCC pile - Google Patents
Pile mould for PCC pile and construction method for overlong PCC pile Download PDFInfo
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- CN101691753B CN101691753B CN2009101835267A CN200910183526A CN101691753B CN 101691753 B CN101691753 B CN 101691753B CN 2009101835267 A CN2009101835267 A CN 2009101835267A CN 200910183526 A CN200910183526 A CN 200910183526A CN 101691753 B CN101691753 B CN 101691753B
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Abstract
The invention discloses a pile mould for a PCC pile and a construction method for an overlong PCC pile. The pile mould consists of a feeding section, one or more segments of intermediate sections and a pile tip section which are connected sequentially; the connection among the sections can be disassembled; and inner pipes of the sections at connecting ends are longer than outer pipes, the inner pipes are connected directly at a connecting position, and the outer pipes are connected by outer pipe connecting sections. The construction method for the overlong PCC pile comprises the following steps: firstly, sinking the pile tip section of the pile mould in foundation soil, and then sinking one or more segments of intermediate sections in the foundation soil until the sunk pile mould reaches a designed pile length; and after concrete is poured, pulling out the pile mould in a subsection mode. The construction method overcomes the restriction to the length of the PCC pile, and the pile length of the PCC pile for construction is increased greatly through the connection of the pile mould of each section so as to implement the construction of the overlong PCC pile. The pile mould can adapt to requirements of different pile lengths due to the detachable pile mould, and is convenient to transport; and the sections of the pile mould are simple in connection and convenient in operation.
Description
Technical field
The present invention relates to a kind of pile foundation construction facility and method, the job practices of particularly a kind of PCC stake stake mould and overlong PCC stake.
Background technology
The cast-in-situ concrete large-diameter tubular pile (abbreviates the PCC stake as; the patent No. 02112538.4 and 01273182.X) adopt mode of vibration with steel internal and external double-layer cavity structure under the flap valve shoe protection of closure; sink to the ground projected depth; in this structural cavities, evenly inject concrete by the concrete current divider; this cavity structure is transferred in vibration then; the flap valve shoe separates when this cavity structure is transferred to automatically; concrete injects cavity structure to be transferred in the cannelure of back formation, forms cast-in-place concrete thin-walled pile tube.PCC stake external diameter is generally 1.0～1.5 meters, and wall thickness is 10～15 centimetres, 20～25 meters of the length of heavy mould pipe.The PCC stake obtains bigger bearing capacity with less concrete amount, is the superior stake type of a kind of economical rationality, cost performance therefore, and this technology has been successfully applied in the large tracts of land treatment of soft foundation engineerings such as speedway, high-speed railway.
In actual engineering, can run into the problem of a mould immersed tube greater than 25 meters super long pile.Under situations such as the superstructure load is big, soft layer is comparatively deep, sedimentation and deformation is strict, the short long needs that often can not satisfy design of stake, it is long therefore to need to increase stake, to reach the purpose that increases bearing capacity of pile foundation and reduce pile foundation settlement.
Have PCC pile driving construction facility height now and be generally 23～28m, a stake mould is a whole steel pipe, non junction, because stake mould length can not surpass the height of construction equipment, so the ground processing degree of depth only is 20～25m.This limitation has seriously limited applying of this economical and practical, stake type that cost performance is superior of PCC stake.The stake that increases the PCC stake is long, just must increase the length of stake mould.Consider the stability of construction equipment self, according to existing job practices, can not increase the height of construction equipment again, consider convenient transportation, single stake mould length can not be oversize, and the stake mould must be limited in below 28 meters.The long method of stake that method by spreading stake mould in the prior art increases construction still can't be used for the PCC stake, because there is inside and outside two-layer sleeve pipe in PCC stake stake mould, when connecting, the stake mould must consider that inside and outside two-layer sleeve pipe all will connect, and interior pipe is blocked by outer tube when connecting, do not have exercisable space, therefore traditional method of attachment is not suitable for the connection of overlong PCC stake.
Summary of the invention
The object of the present invention is to provide a kind of stake mould of PCC stake and the job practices of overlong PCC stake thereof, the stake mould length that can overcome existing method existence is subjected to construction equipment restriction, ground to handle the defective that the degree of depth has limitation, and the stake that the PCC stake can be constructed is grown up and increased greatly.
PCC stake stake mould of the present invention is by realizing by the following technical solutions:
A kind of PCC stake stake mould adopts the internal and external casing structure, it is characterized in that: the stake mould is made up of the feed zone that connects successively, interlude and stake apical segment, and each intersegmental connection is detachable; Each section link in it pipe range directly connect between pipe in the junction in outer tube, connect by the outer tube linkage section between outer tube.
Among the present invention, described stake mould is made up of feed zone, interlude and stake apical segment, and wherein each section stake mould is formed by inside and outside two-layer sleeve pipe, between inside and outside two-layer sleeve pipe median septum is set, fixedly connected with internal and external casing respectively in the median septum two ends, with the fixing position of internal and external casing.
Can flexibly connect successively between each section, as adopt bolt commonly used to connect.Described interlude can be one or more snippets.Described stake apical segment lower end connects flap valve shoe or prefabricated shoe.
The interior pipe of each section link and outer tube all can be provided with strengthens section, strengthens the section casing wall thickness greater than the non-other parts of strengthening section of this section, is generally its 3～5 times.When each section connects, is connected as feed zone and interlude or a stake apical segment, or interlude is when being connected with an apical segment with feed zone, or each interlude is when connecting, interior pipe is strengthened directly connection of section by the interior pipe of each section, and outer tube is connected with the outer tube linkage section by the reinforcement section of outer tube.
Described outer tube linkage section is made up of two semicircle curved surface steel moulds.Understand easily, form the annulus identical with outer tube diameter after two punching block closures of outer tube linkage section, it highly equals the length difference of junction inner and outer pipes.
Above-mentioned PCC stake stake mould can be used for the construction of overlong PCC stake.Its technical scheme is as follows:
A kind of job practices of overlong PCC stake, the stake mould of employing internal and external casing structure is characterized in that a mould by being made up of the feed zone that flexibly connects successively, one or more snippets interlude and a stake apical segment, may further comprise the steps:
(1) the stake apical segment is hung the stake position, feed zone is connected with the stake apical segment;
(2) open vibrating hammer, the heavy mould of vibration sinks in the ground apical segment;
(3) take apart feed zone and stake being connected of apical segment, feed zone is risen to the facility top;
(4) interlude is hung the stake position, the interlude two ends are connected with the stake apical segment with feed zone respectively;
(5) open vibrating hammer, the heavy mould of vibration sinks in the ground interlude; If interlude is a multistage, repeating step (3)～(5) reach designing pile length up to sinking to a mould;
(6) feed intake by charging aperture, and open pile machine equipment, vibration pipe-drawing;
(7) in the tube drawing process, when feed zone arrives the facility top, removes one section interlude, again with feed zone with after next section stake mould is connected, the continuation vibration pipe-drawing is up to extracting an apical segment.
Technique effect of the present invention is, has overcome the restriction of construction equipment height, connects by each section stake mould, and the stake that the PCC stake can be constructed is grown up and increased greatly, thereby realizes the overlong PCC pile driving construction.Because stake mould interlude is detachable, therefore can adapt to the long needs of piles with different, and convenient transportation.Only connect by bolt between each section of stake mould, technology is simple, and is easy to operate.After increase PCC stake stake is long, the PCC stake stake type range of application that cost performance is superior is wider, the superiority of overlong PCC stake mainly is: the inside and outside frictional resistance of stake side has been given full play in (1) overlong PCC stake, make the PCC stake have higher bearing capacity of single pile, therefore the range of application of PCC stake no longer is confined to the preceding composite foundation commonly used of the present invention, and can be used as independently pile foundation, and directly be connected with superstructure, be used for the pile foundation of highrise building, bridge etc.(2) the overlong PCC pile foundation processing degree of depth is big, has therefore increased the degree of depth in reinforcing soft foundation district greatly, makes the PCC stake can handle deeper soft base, handle the degree of depth and be not limited to 20～30m, so range of application is wider.(3) the overlong PCC stake has increased the modulus of compressibility of stabilization zone soft layer greatly, and the stabilization zone degree of depth is big, has therefore greatly reduced the distortion of stabilization zone.The overlong PCC stake can be punched all soft layers owing to handle the degree of depth and increase greatly, as bearing stratum, and do not have the problem of weak substratum with soil layer preferably, so the substratum sedimentation is also very little.The distortion of stabilization zone and substratum is all very little, and primary surface sedimentation explanatorily is very little, therefore can be widely used in the engineering very high to requirement of settlement control, as high-speed railway etc.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.Protection scope of the present invention is not exceeded with the specific embodiment, but is limited by claim.
Description of drawings
The structural representation of Fig. 1 PCC stake of the present invention stake mould;
The axial section of Fig. 2 PCC stake of the present invention stake mould;
Fig. 3 Figure 1A partial enlarged drawing;
Fig. 4 Fig. 2 B partial enlarged drawing;
The vertical view of Fig. 5 outer tube linkage section.
The specific embodiment
As Fig. 1～shown in Figure 5, PCC stake stake mould is inside and outside two-layer circular casing, outer tube diameter 1m, diameter of inner pipe 0.7m, casing wall thickness 1.5cm.The stake mould is made up of feed zone 3, interlude 11 and stake apical segment 12.Stake mould feed zone 3 long 4m, the upper end directly is connected with vibrating hammer 1, fixes in the work progress and does not dismantle.Active force when increasing pile sinking, vibrating hammer 1 can adopt the vibrating hammer of high frequency fluid pressure type.According to designing pile length, interlude 11 can be one or more snippets, every section interlude 11 long 15m.Stake apical segment 12 hypomeres connect flap valve shoe 13, and stake apical segment 12 length are 15m.Junction, each section stake mould two ends all is provided with outer tube and strengthens section 4 and interior pipe reinforcement section 5, strengthening section thickness is 5cm, strengthens being provided with median septum 10 between the section internal and external casing, with the fixing position of internal and external casing, the thickness of median septum 10 is 1.5cm, width and highly be 15cm.Pipe directly connects by connecting bolt 7 in the junction, each section stake mould two ends, and outer tube adopts connecting bolt 7 to connect by outer tube linkage section 6.Outer tube linkage section 6 is made up of two semi-round ring shape curved surface steel moulds, and last lower section respectively has 16 bolts hole 14, and outer tube linkage section 6 can freely be dismantled.
A kind of job practices of overlong PCC stake, concrete steps are as follows:
(1) wire rope with pile machine equipment hangs the stake position with stake apical segment 12, and fixes by stake machine gantry support.
(2) feed zone 3 that will be connects with high frequency hydraulic vibration driver 1 moves on to directly over the apical segment 12, and both internal and external casing vertical non-alignment make the alignment of two sections pipe bolt hole.
(3) before outer tube linkage section 6 is installed, can connecting bolt 7 be put into the reinforcement section bolt mounting holes 8 that pipe is strengthened section 5 by the space between upper and lower two sections outer tubes, insert the connecting bolt hole, and tighten this bolt.Should need 16 connecting bolts 7 altogether in interior pipe junction.
(4) outer tube that outer tube linkage section 6 is put into feed zone 3 and stake apical segment 12 is strengthened between the section 4, and alignment bolt hole 14.With bolt mounting holes 8 or the outer tube linkage section 6 bolt mounting holes 9 inserting bolt holes 14 of connecting bolt 7, and tighten this bolt by reinforcement section 4.This outer tube junction is upper and lower altogether need 32 connecting bolts 7.
(5) open pile sinking equipment, utilize the deadweight and the vibration pressure of high frequency hydraulic vibration driver, an apical segment 12 is lowered in the ground in the protection of flap valve shoe 13 closures,, stop to sink to when the linkage section of feed zone 3 and stake apical segment 12 during near the face of land.
(6) with the Bolt dismantling of feed zone 3 with the linkage section of stake apical segment 12.The order of dismounting is just in time opposite with erection sequence, removes 32 connecting bolts 7 of outer tube junction earlier, then outer tube linkage section 6 is removed 16 connecting bolts 7 of pipe junction in removing by the space of removing outer tube linkage section 6 formation afterwards again.
(7) open pile machine equipment, stake mould feed zone 3 is brought up to the equipment top.
(8) wire rope with pile machine equipment hangs the stake position with stake mould interlude 11, stake mould interlude 11 upper ends and stake mould feed zone 3 vertical non-alignment, stake mould interlude 11 lower ends and stake mould stake apical segment 12 vertical non-alignment make the alignment of two sections pipe bolt hole, and fix by stake machine gantry support.
(9) interlude 11 upper ends are connected with outer tube linkage section 6 by connecting bolt 7 with feed zone 3, stake mould interlude 11 lower ends also are connected the same step of the specific embodiment of connection (3) and (4) with stake mould stake apical segment 12 with outer tube linkage section 6 by connecting bolt 7.
(10) open pile sinking equipment, utilize the deadweight and the vibration pressure of vibrating hammer 1, the protection of interlude 11 in flap valve shoe 13 closures is lowered in the ground,, stop to sink to when the linkage section of feed zone 3 and stake mould interlude 11 during near the face of land.
(11) according to the designing pile length of PCC stake, interlude 11 can be one or more snippets.If multistage, the bolt of the linkage section of dismounting feed zone 3 and interlude 11, repeating step (7)～(10) are sunk to the degree of depth up to the stake mould and are reached designing pile length then.
(12) by charging aperture 2 concrete perfusions, open pile machine equipment then, the tube drawing while vibrating, flap valve shoe 13 is opened under the concrete gravity effect in the tube drawing process, and concrete drops in the toroidal cavity that forms in the ground thus, forms the PCC stake.
(13) in the tube drawing process, when feed zone 3 arrives the equipment tops, removes one section interlude 11, feed zone 3 is continued with after next section stake mould is connected again, the continuation tube drawing is up to extracting an apical segment 12.The stake mould removes and installs the same step of method (3), (4) and (6).
Through above-mentioned steps, an overlong PCC stake casting complete.
Claims (10)
1. a PCC stake stake mould adopts the internal and external casing structure, it is characterized in that: the stake mould is made up of the feed zone that connects successively, interlude and stake apical segment, and each intersegmental connection is detachable; Each section link in it pipe range directly connect between pipe in the junction in outer tube, connect by the outer tube linkage section between outer tube.
2. PCC stake stake mould according to claim 1 is characterized in that: described interlude is one or more snippets.
3. PCC stake stake mould according to claim 1 is characterized in that: the interior pipe of described each section link and outer tube all are provided with strengthens section, strengthens the section casing wall thickness greater than non-reinforcement section.
4. PCC stake stake mould according to claim 1 is characterized in that: described each intersegmental employing bolt connects.
5. PCC stake stake mould according to claim 1, it is characterized in that: between inside and outside two-layer sleeve pipe median septum being set, fixedlys connected with internal and external casing respectively in the median septum two ends.
6. PCC stake stake mould according to claim 1, it is characterized in that: described outer tube linkage section is made up of two semicircle curved surface steel moulds.
7. the job practices of an overlong PCC stake adopts the stake mould of internal and external casing structure, it is characterized in that a mould is made up of the feed zone that flexibly connects successively, one or more snippets interlude and a stake apical segment, may further comprise the steps:
(1) the stake apical segment is hung the stake position, feed zone is connected with the stake apical segment;
(2) open vibrating hammer, the heavy mould of vibration sinks in the ground apical segment;
(3) take apart feed zone and stake being connected of apical segment, feed zone is risen to the facility top;
(4) interlude is hung the stake position, the interlude two ends are connected with the stake apical segment with feed zone respectively;
(5) open vibrating hammer, the heavy mould of vibration sinks in the ground interlude; If interlude is a multistage, repeating step (3)～(5) reach designing pile length up to sinking to a mould;
(6) feed intake by charging aperture, and open pile machine equipment, vibration pipe-drawing;
(7) in the tube drawing process, when feed zone arrives the facility top, removes one section interlude, again with feed zone with after next section stake mould is connected, the continuation vibration pipe-drawing is up to extracting an apical segment.
8. the job practices of overlong PCC stake according to claim 7 is characterized in that: pipe range is in outer tube in it at link for each section of described stake mould, and directly connection between pipe is connected by the outer tube linkage section between outer tube in the junction.
9. the job practices of overlong PCC stake according to claim 8 is characterized in that: described outer tube linkage section is made up of two semicircle curved surface steel moulds.
10. the job practices of overlong PCC stake according to claim 7 is characterized in that: the interior pipe of described each section link and outer tube all are provided with strengthens section, strengthens the section casing wall thickness greater than non-reinforcement section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101835267A CN101691753B (en) | 2009-09-14 | 2009-09-14 | Pile mould for PCC pile and construction method for overlong PCC pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101835267A CN101691753B (en) | 2009-09-14 | 2009-09-14 | Pile mould for PCC pile and construction method for overlong PCC pile |
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| CN101691753A CN101691753A (en) | 2010-04-07 |
| CN101691753B true CN101691753B (en) | 2011-01-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102248591B (en) * | 2011-05-23 | 2012-09-05 | 大连大金马基础建设有限公司 | Prestressing pile tip prefabrication pouring mold |
| CN102296602B (en) * | 2011-06-08 | 2013-06-05 | 河海大学 | Dual-layer casing connecting section of overlong PCC (cast-in-place concrete large-diameter pipe) pile mould and dip mould connecting method |
| CN107989026A (en) * | 2017-11-24 | 2018-05-04 | 上海市机械施工集团有限公司 | A kind of prefabricated ground walls and its construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4137541A1 (en) * | 1991-11-14 | 1993-05-27 | Schorr Claus Peter | Method of on site production of concrete piles - by implement which forms hole in the ground and directs concrete into hole |
| CN2246575Y (en) * | 1995-09-27 | 1997-02-05 | 马培龙 | Flexible pipe pile steel mould without packing |
| CN1367296A (en) * | 2002-01-14 | 2002-09-04 | 河海大学 | Soft foundation composite ground base construction method for field pouring pipe pile with large diameter |
| CN2515246Y (en) * | 2001-12-31 | 2002-10-09 | 河海大学 | Double pipe mould forming large diameter field pouring tubular pile machine used for soft ground |
| CN2712587Y (en) * | 2003-11-28 | 2005-07-27 | 邹宗煊 | Bamboo ring shaped pre-stressed pipe pile steel mould |
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2009
- 2009-09-14 CN CN2009101835267A patent/CN101691753B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4137541A1 (en) * | 1991-11-14 | 1993-05-27 | Schorr Claus Peter | Method of on site production of concrete piles - by implement which forms hole in the ground and directs concrete into hole |
| CN2246575Y (en) * | 1995-09-27 | 1997-02-05 | 马培龙 | Flexible pipe pile steel mould without packing |
| CN2515246Y (en) * | 2001-12-31 | 2002-10-09 | 河海大学 | Double pipe mould forming large diameter field pouring tubular pile machine used for soft ground |
| CN1367296A (en) * | 2002-01-14 | 2002-09-04 | 河海大学 | Soft foundation composite ground base construction method for field pouring pipe pile with large diameter |
| CN2712587Y (en) * | 2003-11-28 | 2005-07-27 | 邹宗煊 | Bamboo ring shaped pre-stressed pipe pile steel mould |
Non-Patent Citations (1)
| Title |
|---|
| 刘汉龙等.振动沉模大直径现浇薄壁管桩技术及其应用（I）：开发研制与设计.《岩土力学》.2003,第24卷(第2期),全文. * |
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