CN102277869B - Plug hole type pressure-reducing drainage pipe pile and preparation process thereof - Google Patents
Plug hole type pressure-reducing drainage pipe pile and preparation process thereof Download PDFInfo
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- CN102277869B CN102277869B CN201110123233.7A CN201110123233A CN102277869B CN 102277869 B CN102277869 B CN 102277869B CN 201110123233 A CN201110123233 A CN 201110123233A CN 102277869 B CN102277869 B CN 102277869B
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- 239000004567 concrete Substances 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 208000005189 Embolism Diseases 0.000 claims description 40
- 230000006837 decompression Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 17
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 13
- 239000010985 leather Substances 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000010606 normalization Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract 1
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- 238000010276 construction Methods 0.000 description 8
- 239000011148 porous material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 208000028804 PERCHING syndrome Diseases 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 239000011372 high-strength concrete Substances 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
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Abstract
The plug hole type pressure reducing and draining pipe pile comprises: the tubular pile comprises a tubular pile body and a pile cap, wherein at least one row of plug holes axially distributed along the tubular pile body are formed in the tubular pile body, plugs are arranged in the plug holes, one end of each plug, which is located on the inner wall of the tubular pile body, is connected with a traction cable, and the traction cable extends in the tube of the tubular pile body until the top of the tubular pile body. The preparation process comprises the following steps: reserving through hollow holes serving as plug holes at the periphery of the template, welding steel bars at the periphery of the through hollow holes, and then manufacturing plugs; putting a reinforcement cage into a template, inserting a plug into a reserved hollow hole on the template, abutting against an inner template and exposing the plug out of the template, pulling a traction cable out of the inner template of the tubular pile along a pile body, binding the plug on the template by using a steel wire, pouring concrete, performing prestress tensioning and centrifugal forming after film combination, performing autoclave curing, cutting off the steel wire bound outside the template after strength is achieved, demolding by using a demolding agent, flattening the plug with the exposed pile body along the pile body, and welding a pile cap.
Description
Technical field
This technology relates to a kind ofly considers that the pile tube consent utilizes embolism the reduce pressure pile tube and the preparation technology of draining.
Background technology
In the basic engineering construction, the prefabricated reinforced concrete pile tube has bearing capacity of single pile high, and speed of application is fast, and the duration is short, and workmanship is easy to control and guarantee the low characteristics that wait of cost.Yet the prefabricated reinforced concrete pile tube belongs to crowded soil stake, and in work progress, pile sinking need arrange the soil body with volume; Especially in the saturated soft soil big in compressibilty, that transmission coefficient is less; In pile driving process, will cause high excess pore water pressure, great changes will take place thereby make around it stress field in soil; This possibly cause the displacement of pile peripheral earth protuberance and occurred level direction; Adjacent pile head produces come-up and shift phenomenon, and come-up and side-play amount can increase in time gradually, and this will have influence on next step construction equally.Meanwhile, the bearing capacity of stake because of pile sinking after negative friction effect under the stake side direction of the fixed generation of pile peripheral earth reduce, these are to constructing and environment has all produced great negative effect.
For the above-mentioned negative effect that reduces to cause in the pile tube pile driving process; Must reduce the excess pore water pressure that produces in the piling construction process; Accelerate the dissipation of excess pore water pressure, thereby improve the shear strength of the soil body, improve speed of application; Reduce harm, guarantee the quality of pile tube in construction environment.Therefore, the decompression drainability of pile tube is directly connected to the quality of pile sinking quality, develops a kind of not only simple but also economic decompression draining pile tube and seems particularly urgent.
Summary of the invention
Technical problem to be solved by this invention is the shortcoming to above-mentioned prior art, and a kind of jack decompression draining pile tube and preparation technology thereof of the draining of reducing pressure are provided.
The present invention adopts following technical scheme:
A kind of jack decompression draining pile tube of the present invention; Comprise: pile tube body and pile cover; On the pile tube body, be provided with at least delegation along the consent of pile tube body axial distribution; In consent, be provided with embolism, be connected with drawing rope and drawing rope extends the top until the pile tube body at the pipe of pile tube body at the end that is positioned at the pile tube inner body wall of embolism.
The preparation technology of a kind of jack decompression draining pile tube of the present invention, step is following:
Compared with prior art, the present invention has following advantage:
The present invention is put in drawing rope on the ground.Measure the fixed stake of unwrapping wire position, pile-forming machine perching also lifts by crane prefabricated tubular pile, adopts hammering method or static pressure construction.During pile sinking, the verticality of strict control pile tube, and guarantee pile sinking speed notices preventing that drawing rope from breaking falls or embolism comes off.When treating that pile tube stake end reaches design elevation, stop piling.At this moment; Strain at some and be in the drawing rope that connects embolism on the ground; Make the embolism of filling pile tube sidewall consent come off, formed a series of holes on the pile tube, this just lets the hole suffered extruding force of the soil body on every side be eased; Thereby reduced because the caused excess pore water pressure of pile sinking plays depressurization; And; Hole on the pile tube sidewall is that the discharge of pore water provides passage, and the earth in the hole becomes permeable at this moment, under the excess pore water pressure effect that in pile driving process, causes; The pore water not hole of cracked ends tubular pile body flows in the pile tube; Connect in the pipe that pumping equipment draws water or collection and treatment after make his usefulness in addition, thereby play a role in the drainage, the water content of inter-pile soil is reduced; Quicken dissipation and inter-pile soil body fixed of pore water pressure, improved the native shear strength and the supporting capacity of pile foundation.So the present invention has the effect of decompression and draining.
Description of drawings
Below in conjunction with accompanying drawing and implementation method this technology is further specified.
Fig. 1 is the embolism elevational schematic view of jack decompression draining pile tube of the present invention.
Fig. 2 is the cope match-plate pattern sketch map of jack decompression draining pile tube of the present invention.
Fig. 3 is the lower bolster sketch map of jack decompression draining pile tube of the present invention.
Fig. 4 is the inner and outer template sketch map of jack decompression draining pile tube of the present invention.
Fig. 5 is the template assembling sketch map of jack decompression draining pile tube of the present invention.
Fig. 6 is the front and back template sketch map of jack decompression draining pile tube of the present invention.
Fig. 7 is the A-A sectional drawing of jack decompression draining pile tube of the present invention.
Fig. 8 is the floor map of jack decompression draining pile tube of the present invention.
Fig. 9 is the B-B sectional drawing of jack decompression draining pile tube of the present invention.
Figure 10 is a jack decompression gutter pile constructing process flow chart of the present invention.
Among the figure: 1. siliceous leather sheath; 2. embolism; 3. consent; 4. rod iron; 5. drawing rope 6. pile tube bodies.
The specific embodiment
A kind of jack decompression draining pile tube; Comprise: pile tube body 6 and pile cover; On pile tube body 6, be provided with at least delegation along the consent 3 of pile tube body axial distribution; In consent 3, be provided with embolism 2, be connected with drawing rope 5 and drawing rope 5 extends the top until the pile tube body at the pipe of pile tube body at the end that is positioned at the pile tube inner body wall of embolism 2.In the present embodiment; The central axis of consent 3 intersects or intersects with pile tube body central axis; And an end that is positioned at the pile tube inner body wall of consent 3 is higher than an end that is positioned at pile tube body outer wall of consent 3; In the present embodiment, the central axis of consent 3 and pile tube body central axis angle can be 45 degree, are provided with siliceous leather sheath 1 in the outside of embolism 2.
A kind of preparation technology of jack decompression draining pile tube, step is following:
The template that step 1 is produced pile tube in factory normalization is reserved the perforation hollow hole of oblique 45 ° of holes as consent all around vertically; And on template each weld rod iron around connecting hollow hole, makes on several tether and the outer cover siliceous leather sheath, diameter again and equal to connect on the template hollow hole, length and radially be provided with the embolism that connects straight rod iron greater than template pipe shaft thickness, near the top.
Preparation technology of the present invention and construction technology are described below in more detail:
(1) pile tube production technology
Make the prefabricated reinforced concrete pile tube of diameter 450mm, wall thickness 90mm, the long 10m of stake, percent opening about 5% adopts the pre-tensioned prestressing centrifugal molding process, stream curing.
1. reinforcing bar processing
By necessary requirement reinforcing bar is processed, the PCB rod iron is carried out customized cut-off, heading and roll welding moulding (configuration principal rod and stirrup).
2. the preparation of tubular pile concrete
Tubular pile concrete intensity is selected high-strength concrete C80 for use, adopts a stepwise alr mode, and Mixing Machine is selected double-shaft horizontal for use, and alr mode is selected for use horizontal, accomplishes in short-term, " to stir ", and adopts the water reducing agent latter admixing method, prepares mould after preparation is accomplished.
3. template construct
Around the template of factory normalization production pile tube, reserve the about 20mm perforation of several oblique 45 ° of diameters hollow hole before the fluid concrete along the stake length direction; About percent opening 5%; And 2 about 10mm rod irons of diameter are welded along the stake length direction in each hole two outside template; Make several tether again and put siliceous leather sheath all around and (prevent embolism and concrete binding; Siliceous leather sheath can be anti-high temperature during stream curing), diameter equals to connect hollow hole on the template, grow up in template pipe shaft thickness and expose to the exterior sheathing place and leave about 5mm and connect the rod iron that the embolism of hollow hole and diameter that fixing plug is used equal to connect on the embolism hollow hole; At first the reinforcing cage that processes is put into the template that has prepared; And the embolism (band rope) that will tightly overlap siliceous leather sheath passes reinforcing cage and is inserted into oblique 45 ° of template and reserves and prop up inner formword (note embolism and reinforcing bar in the pile tube stagger each other and guarantee the protective layer thickness of the interior reinforcing bar of pile tube) in the hollow holes; Pull out along pile body in the pile tube inner formword other end of drawing rope, then with rod iron pass on the embolism consent and with template on welding is good in advance rod iron utilize the colligation of steel wire two that embolism is fixed, and the concrete for preparing of cast; After closing film, prepare next step technology.
4. prestressed stretch-draw and centrifugal forming
Envelope is carried out prestressed stretch-draw and centrifugal forming behind the mould, and the outer stretching mode of prestressed stretch-draw process using is controlled the stretch-draw precision well, and the stretch-draw Displaying Meter selects minimum scale at 0.5Mpa.Centrifuging process adopts the stage moulding, i.e. low speed cloth, and middle low speed refining, middle one-tenth speed shape, high speed is closely knit; Densification pressure is 5～10 N/
(being that centrifugal acceleration is 35～40 g) down at a high speed, and controlling desirable middling speed value is that Vmax/
reaches preferable inside and outside layering; Control value at a slow speed is 30k/
; Abundant refining is so that concrete material evenly distributes in the pile tube mould.Total centrifugation time should not fully take into account the centrifugation time and the speed of middling speed less than 18min when parameter of noncentricity is selected, farthest to reduce interior layering.
Pile tube adopts autoclave curing, makes concrete obtain the Zhang Qiangdu of putting that requires at short notice, adds admixture and make between the quiet stopping time to be controlled in 2 h, notes rational heating curve and temperature lowering curve, constant temperature and pressure, and saturated-steam temperature is controlled under the 1.0MPa.The intensification scope is controlled at 35～40 ℃/h, can not be too fast in order to avoid cause thermal stress cracks.Process about 2～3 h to be arranged during step-down, prevent that instantaneous controlled pressure drop from causing the unexpected evaporation and the concrete explosion of concrete mesopore water.Maintenance 2 days reaches the steel wire of cutting off the outer colligation of template after the intensity, use the release agent demoulding, and the embolism that will expose pile body scabbles along pile body, and the pile cover of burn-oning is transported to the job site through after the assay was approved, the preparation pile sinking.
(2) before pile sinking, the other end of drawing rope is put on the ground.
(3) adopt static pressure construction, measure the fixed stake of unwrapping wire position, pile-forming machine perching also lifts by crane prefabricated tubular pile, and is through pile press clamping oil cylinder that pile holder is tight, makes the piling oil cylinder stretch journey then, and pressure is applied in the stake, and stake is pressed into soil layer; After stretching the journey completion, unclamp the clamping oil cylinder, the backhaul of piling oil cylinder; Repeat above-mentioned action,, in the piling process, should conscientiously observe the relation of an embedded depth and pressure gauge reading, to judge the quality and the bearing capacity of stake until stake being pressed into the predetermined degree of depth.
(4) verticality of strict control pile tube, the perpendicularity deviation of stake must not surpass 0.5%, and guarantees pile sinking speed, notices preventing that drawing rope from breaking falls or embolism comes off; When treating that pile tube stake end reaches design elevation, stop piling, strain at some this moment and be in the drawing rope that connects embolism on the ground, make the embolism of filling pile tube sidewall consent come off;
(5) his usefulness is made in the water collection and treatment that utilizes pumping equipment to extract in the pile tube after a period of time afterwards in addition;
(6) carry out the piling construction of next root canal pile as stated above.
Claims (4)
1. jack decompression draining pile tube; Comprise: pile tube body (6) and pile cover; It is characterized in that; Be provided with on pile tube body (6) at least that delegation is provided with embolism (2) along the consent (3) of pile tube body axial distribution in consent (3), be connected with drawing rope (5) and drawing rope (5) extends the top until the pile tube body at the pipe of pile tube body at the end that is positioned at the pile tube inner body wall of embolism (2).
2. jack decompression draining pile tube according to claim 1; It is characterized in that; The central axis of consent (3) intersects or intersects with pile tube body central axis, and an end that is positioned at the pile tube inner body wall of consent (3) is higher than an end that is positioned at pile tube body outer wall of consent (3).
3. jack decompression draining pile tube according to claim 1 and 2 is characterized in that, is provided with siliceous leather sheath (1) in the outside of embolism (2).
4. the preparation technology of the said jack decompression of a claim 1 draining pile tube is characterized in that step is following:
Step 1: produce in factory normalization around the template of pile tube along the pile tube body shaft to reserving the perforation hollow hole of oblique 45 ° of holes as consent; And on template each weld rod iron (4) around connecting hollow hole, makes on several tether and the outer cover siliceous leather sheath, diameter again and equal to connect on the template hollow hole, length and radially leave the embolism that connects straight rod iron greater than template pipe shaft thickness, near the top;
Step 2: the reinforcing cage that processes is put into the template that has prepared, and the embolism that will tightly overlap siliceous leather sheath passes reinforcing cage and be inserted in the reservation hollow hole on the template, prop up inner formword and make embolism expose to template, drawing rope is pulled out along pile body in the pile tube inner formword; Then utilize rod iron (4) with embolism with steel wire lashing on template, and the concrete for preparing of cast carries out prestressed stretch-draw and centrifugal forming behind the matched moulds; After this carry out autoclave curing; Maintenance 2 days reaches the steel wire of cutting off the outer colligation of template after the intensity, uses the release agent demoulding; And the embolism that will expose pile body scabbles the pile cover of burn-oning along pile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110123233.7A CN102277869B (en) | 2011-05-13 | 2011-05-13 | Plug hole type pressure-reducing drainage pipe pile and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110123233.7A CN102277869B (en) | 2011-05-13 | 2011-05-13 | Plug hole type pressure-reducing drainage pipe pile and preparation process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102277869A CN102277869A (en) | 2011-12-14 |
| CN102277869B true CN102277869B (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110123233.7A Active CN102277869B (en) | 2011-05-13 | 2011-05-13 | Plug hole type pressure-reducing drainage pipe pile and preparation process thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103302743B (en) * | 2013-05-30 | 2016-03-30 | 福建建华建材有限公司 | A kind of centrifuging process improving inner wall strength of pipe pile |
| CN109914384A (en) * | 2019-03-05 | 2019-06-21 | 天津城建大学 | A kind of Novel pressure-reducing draining precast pile and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2816130Y (en) * | 2005-06-08 | 2006-09-13 | 曹析风 | Hollow drainage prefabricated pile capable of largely increasing single-pile bearing capacity |
| CN101440619A (en) * | 2008-07-02 | 2009-05-27 | 中冶交通工程技术有限公司 | Seismic ecological bearing pile |
| CN201588206U (en) * | 2009-11-12 | 2010-09-22 | 任再永 | Water discharge pile pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2692193B2 (en) * | 1988-11-11 | 1997-12-17 | 住友金属工業株式会社 | Liquefaction control pile |
| JPH11310917A (en) * | 1998-04-28 | 1999-11-09 | Nippon Steel Corp | Steel pile sheet or steel pipe pile with drainage function |
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2011
- 2011-05-13 CN CN201110123233.7A patent/CN102277869B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2816130Y (en) * | 2005-06-08 | 2006-09-13 | 曹析风 | Hollow drainage prefabricated pile capable of largely increasing single-pile bearing capacity |
| CN101440619A (en) * | 2008-07-02 | 2009-05-27 | 中冶交通工程技术有限公司 | Seismic ecological bearing pile |
| CN201588206U (en) * | 2009-11-12 | 2010-09-22 | 任再永 | Water discharge pile pipe |
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| CN102277869A (en) | 2011-12-14 |
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Owner name: HONGSHENG CONSTRUCTION INVEST GROUP CO., LTD. Free format text: FORMER OWNER: NANJING UNIVERSITY OF TECHNOLOGY Effective date: 20140804 |
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Free format text: CORRECT: ADDRESS; FROM: 210009 NANJING, JIANGSU PROVINCE TO: 330038 NANCHANG, JIANGXI PROVINCE |
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Effective date of registration: 20140804 Address after: Zhonghang Plaza No. 330038 Jiangxi 1 Nanchang province Honggutan North Avenue 15 floor of Ganjiang River Patentee after: HONGSHENG CONSTRUCTION INVESTMENT GROUP Co.,Ltd. Address before: 210009 Zhongshan North Road, Jiangsu, No. 200, Patentee before: Nanjing Tech University |