CN1238610C - Sleeve pile and designing method - Google Patents
Sleeve pile and designing method Download PDFInfo
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- CN1238610C CN1238610C CN 02121768 CN02121768A CN1238610C CN 1238610 C CN1238610 C CN 1238610C CN 02121768 CN02121768 CN 02121768 CN 02121768 A CN02121768 A CN 02121768A CN 1238610 C CN1238610 C CN 1238610C
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Abstract
The present invention relates to a pile used in the field of geotechnical engineering, particularly to a sleeve pipe which uses a finished pile with high structural load carrying capacity, such as a prestressed pipe pile, or a steel pile, etc. as a pile core and uses mixed gelled materials which have low intensity and are prepared by industrial waste, such as fly ash, etc. to cover the pile core as jackets, so that a pile body in a combined structure is formed. Locating disks are fixedly arranged in two positions or a plurality of positions at the lower part and the upper part of the pile core, wherein pre-kept notches are arranged around each locating disk, and the outer diameter of each locating disk is smaller than the outer diameter of a pile cover. Compared with a pile formed by the existing hole-forming technology, the sleeve pile has the advantages of high load carrying capacity and low manufacturing cost.
Description
Technical field
The present invention is a kind of lag pile that is used for the geotechnical engineering field, pile of special lag pile and preparation method thereof.
Background technology
The stake type that existing pile foundation technology is provided, though the pile-formation process difference, nothing more than the stake of in-site pouring concrete, prefabricated concrete stake, piling bar etc., they have following problem:
1, these types all are to carry out pile body design and calculate by homogeneous materials, for Piles for Friction Piles, and the unmatched problem of bearing capacity of foundation soil that structural bearing capacity and the soil body determined that has material of body of a pile usually and determined.Especially in weak soil for the bearing capacity of foundation soil that improves stake strengthens pile body, caused the waste of more than needed and material of the structural bearing capacity of stake.
2, existing grouting process adopts the gap between the cement paste fitted pile soil, can suitably improve the bearing capacity of stake, but can not increase the driven dimension of pile body effectively.
3, there is different pile defects in existing stake type.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned shortcoming and custom-designed lag pile, this is a kind of novel combined material stake, be characterized in " outer weak interior strong ", be that pile body is formed by the material of two kinds of varying strengths is compound, its core is a high-strength material, pile protection is a low-intensity material, and both binding energy add the bearing capacity of foundation soil of timber pile, and reduces cost of manufacture.
The present invention realizes as follows:
Described lag pile is made up of stake core and pile protection, and the stake core be the prior finished peg of making, is enclosed with pile protection at the periphery of stake core, stake core and pile protection are collectively referred to as pile body, on stake core bottom and top, are set with positioning disk, the periphery of positioning disk is provided with the reservation breach, and the external diameter of positioning disk should be less than the external diameter of pile protection.
Described stake core is shorter than pile protection, or isometric with pile protection, plant stake after, make a core longer by static pressure or vibration etc. than pile protection.
Described stake core is the finished peg of making in advance, and this finished peg is ordinary concrete stake, pile for prestressed pipe, high-strength Prestressed Pipe Pile, steel pipe concrete stake, piling bar; The section form of stake core is solid or hollow rectangle, circle, I-shaped, Y font, T shape; The stake wicking surface is provided with concavo-convex graining; The stake core constitutes the compound pile core by 1-3 root finished peg.
Described pile protection material is cement paste or high flowability concrete; Its intensity is 3～15Mpa.
Described pile protection intensity is 5-10Mpa.
The volume ratio of described pile body and stake core is greater than 1.5.
A kind of method for preparing the described lag pile of claim 1, described lag pile waters at the construction field (site) and makes, the pile-formation process of lag pile is undertaken by three steps: pore-forming, the perfusion slurry, plant a core, the pore-forming mode is auger boring, manually digging hole, high frequency or medium and low frequency vibration shaped steel pore-forming, the perfusion slurry adopts pressure injection or does not have pressure injection, perfusion slurry in pore-forming, or pour into slurry behind the pore-forming, plant a core and adopt one piece to implant, implant behind the perfusion slurry earlier, implant earlier and afterwards pour into slurry, or implant and pour into slurry simultaneously.
Good effect of the present invention is:
(1) economy, low strong compound adopts the industrial waste preparation, and concrete can be saved cost 30-50% relatively.Usually the 30-50% of lag pile combined material is prefabricated concrete, and 55-70% is low strong compound, and the identical relatively castinplace pile of this stake type will be saved cost 10-25%, and preformed pile will be saved cost more than 60% relatively, and this is a kind of stake type of very economical.
(2) reliability is good, owing to adopt the stake core to implant, does not cause the defective of a core on technology, that is to say the pile body zero defect, and this is that existing any technology is all unapproachable.
(3) value of environmental protection, the pile protection material can consume industrial waste in a large number, as: waste materials such as flyash, slag, slag, consumption will arrive 50-80%, and environment protection significance is very great.
Description of drawings
Fig. 1 is a structure chart of the present invention
Fig. 2 is an A-A view among Fig. 1
Fig. 3 is the stake core sectional view of different shape
Among the figure, 1 core, 2 positioning disks, 3 pile protections.
The specific embodiment
As shown in Figure 1, described lag pile is made up of stake core 1, pile protection 3, positioning disk 2, stake core 1 is the finished peg of making in advance, periphery at stake core 1 is enclosed with pile protection 3, stake core 1 is shorter than pile protection 3 usually, also can be isometric with pile protection 3, can also be after planting stake, make a core 1 longer than pile protection 3 by static pressure or vibration etc., stake core 1 is collectively referred to as pile body with pile protection 3, on two positions on stake core 1 bottom and top, be set with positioning disk 2, the periphery of positioning disk 2 is provided with the reservation breach, guarantees the circulation and the supply of pile protection slurry, and the external diameter of positioning disk 2 should be less than the external diameter of pile protection 3.Shown in Figure 2 is, and the cross section is circular stake core, the stake core of shapes such as shown in Figure 3 the is cross section is Y shape T shape H shape rectangle.
The method for designing of lag pile is: the pile body structural bearing capacity calculates by stake core intensity; The bearing capacity of foundation soil of lag pile, i.e. end resistance and side resistance are calculated by combination pile body size; The sedimentation of lag pile pile foundation according to existing code requirement, is pressed the combination size of lag pile and is calculated.
Describe below in conjunction with a specific embodiment:
Desire to build certain 19 layers of residential building, its pile body structural bearing capacity calculates by the intensity of stake core according to relevant concrete structure standard or norm of steel structure etc., selects φ 400 high-strength Prestressed Pipe Pile for use; The sedimentation of lag pile pile foundation according to existing code requirement, is pressed the combination size of lag pile and is calculated.Above-described calculating is the existing method for normalizing that calculates, and will not describe in detail at this.Below only elaborate with regard to the calculating of the bearing capacity of foundation soil of lag pile.The bearing capacity of foundation soil of described lag pile equals resistance of the suffered side of pile body and end resistance sum, and wherein, the side resistance is decided by underground each layer soil condition, and the end resistance is then decided by the soil condition of the soil layer that touches with the pile body bottom connection, and its geological conditions is as follows:
| The soil layer classification | Mud | Clay | Silty clay | Clay | Clay | Silty clay | Clay |
| Soil layer | 1 | 2.7 | 1.4 | 9.2 | 2.1 | 1.5 | 1.5 |
| I layer side resistance kN/m 2 | 45 | 36 | 60 | 75 | 50 | 78 | |
| End resistance kN/m 2 | 2500 |
By last Biao Kede:
Total bed thickness=1+2.7+1.4+9.2+2.1+1.5+1.5=19.4 (m)
So get effective length H=18m, lag pile diameter D=0.6m, the stake core is selected φ 400 high-strength Prestressed Pipe Pile (PHC) for use.
According to following calculating, can obtain the pile body bearing capacity of foundation soil:
Pile body bearing capacity of foundation soil=total side resistance+total end resistance
=lateral area * ∑ (i layer thickness * i layer side resistance)+floor space * end resistance
By calculating, can draw:
The suffered total side resistance of lag pile is: 2017kN
The suffered total end resistance of lag pile is: 707kN
The lag pile bearing capacity of foundation soil is: 2724kN
The vertical bearing capacity design load of lag pile is: 1600kN.
Claims (7)
1. lag pile, it is characterized in that: described lag pile is made up of stake core and pile protection, the stake core is the finished peg of making in advance, periphery at the stake core is enclosed with pile protection, stake core and pile protection are collectively referred to as pile body, on stake core bottom and top, are set with positioning disk, the periphery of positioning disk is provided with the reservation breach, and the external diameter of positioning disk should be less than the external diameter of pile protection.
2. lag pile according to claim 1 is characterized in that: the stake core is shorter than pile protection, and is or isometric with pile protection, plant stake after, make a core longer by static pressure or vibration etc. than pile protection.
3. lag pile according to claim 1 is characterized in that: the finished peg of stake core for making in advance, and this finished peg is ordinary concrete stake, pile for prestressed pipe, high-strength Prestressed Pipe Pile, steel pipe concrete stake, piling bar; The section form of stake core is solid or hollow rectangle, circle, I-shaped, Y font, T shape; The stake wicking surface is provided with concavo-convex graining; The stake core constitutes the compound pile core by 1-3 root finished peg.
4. lag pile according to claim 1 is characterized in that: the pile protection material is cement paste or high flowability concrete; Its intensity is 3～15Mpa.
5. lag pile according to claim 4 is characterized in that: pile protection intensity is 5-10Mpa.
6. according to any one described lag pile of claim 1-5, it is characterized in that: the volume ratio of pile body and stake core is greater than 1.5.
7. method for preparing the described lag pile of claim 1, it is characterized in that: described lag pile waters at the construction field (site) and makes, the pile-formation process of lag pile is undertaken by three steps: pore-forming, the perfusion slurry, plant a core, the pore-forming mode is auger boring, manually digging hole, high frequency or medium and low frequency vibration shaped steel pore-forming, the perfusion slurry adopts pressure injection or does not have pressure injection, perfusion slurry in pore-forming, or pour into slurry behind the pore-forming, plant a core and adopt one piece to implant, implant behind the perfusion slurry earlier, implant earlier and afterwards pour into slurry, or implant and pour into slurry simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121768 CN1238610C (en) | 2002-05-10 | 2002-05-10 | Sleeve pile and designing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121768 CN1238610C (en) | 2002-05-10 | 2002-05-10 | Sleeve pile and designing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414186A CN1414186A (en) | 2003-04-30 |
| CN1238610C true CN1238610C (en) | 2006-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02121768 Expired - Fee Related CN1238610C (en) | 2002-05-10 | 2002-05-10 | Sleeve pile and designing method |
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| Country | Link |
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| CN (1) | CN1238610C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493452A (en) * | 2011-11-30 | 2012-06-13 | 蔡嘉明 | Grouting pile-grafting construction method and equipment |
| CN102660945B (en) * | 2012-05-31 | 2014-09-10 | 福州市第三建筑工程公司 | Spiral steel strip and cement diameter-increasing pipe pile and construction method thereof |
| CN102733380A (en) * | 2012-06-17 | 2012-10-17 | 张永忠 | Lag pile and construction method thereof |
| CN102733376B (en) * | 2012-07-02 | 2019-09-17 | 朱建新 | Composite pile and its construction method |
| CN103541353B (en) * | 2012-07-17 | 2016-12-21 | 德翰智慧科技有限公司 | Foundation pile |
| CN103437346B (en) * | 2013-07-18 | 2016-01-20 | 浙江中隧桥波形钢腹板有限公司 | Steel pipe pile with the burr and construction method |
| CN103485333B (en) * | 2013-07-18 | 2016-02-24 | 浙江中隧桥波形钢腹板有限公司 | Waveform hollow steel pipe friction pile and construction method |
| CN103397644B (en) * | 2013-07-30 | 2015-05-27 | 江苏翔森建设工程有限公司 | Combined special-shape steel plate stiffened-core cement foundation pit support structure and construction method thereof |
| CN103590393A (en) * | 2013-11-21 | 2014-02-19 | 朱建新 | Construction method of composite pile |
| CN106480877A (en) * | 2015-08-28 | 2017-03-08 | 毕建东 | The pile making method of pipe sinking pressure grouting composite pile |
| FR3093118B1 (en) * | 2019-02-21 | 2021-02-19 | C H A B | Sheath formed by at least one circular knit for the realization of a reinforced concrete pile |
| CN112921958A (en) * | 2021-01-29 | 2021-06-08 | 徐州八方建筑工程有限公司 | High-pressure jet grouting hole-leading static pressure pile construction method |
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2002
- 2002-05-10 CN CN 02121768 patent/CN1238610C/en not_active Expired - Fee Related
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| CN1414186A (en) | 2003-04-30 |
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Granted publication date: 20060125 Termination date: 20120510 |