CN207092110U - A kind of friction pile based on the beam of uniform strength - Google Patents
A kind of friction pile based on the beam of uniform strength Download PDFInfo
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- CN207092110U CN207092110U CN201720623309.5U CN201720623309U CN207092110U CN 207092110 U CN207092110 U CN 207092110U CN 201720623309 U CN201720623309 U CN 201720623309U CN 207092110 U CN207092110 U CN 207092110U
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Abstract
A kind of friction pile based on the beam of uniform strength, including it is embedded in the pile body of gliding mass and basement rock；Pile body is presented variable cross-section form along its length, and maximum through the position Shi Zhuan sections of sliding surface, pile body is entering rock-soil layer from gliding mass position, through sliding surface after in embedded basement rock, the 1/3 of anchorage depth L0 depth >=long L of always stake of pile body；Predeformation packed layer is also filled between pile body and gliding mass.A kind of friction pile based on the beam of uniform strength provided by the utility model, can solve the problems such as operating difficulties, cost are high, anti-skid effect is bad, utilize the theory of the beam of uniform strength, can give full play to after stake and before stake the gravity pressure of Rock And Soil, the anti-pressure ability of good ground and the stake of base expanding and base expanding section anti sliding with load function, it is effectively improved pile body stress intensity, bending resistance and the shear resistance of friction pile are improved, while has the effect of anti-slide mass concurrently.
Description
Technical field
It the utility model is related to field of civil engineering, especially a kind of friction pile based on the beam of uniform strength.
Background technology
The measure of harnessing landslide, side slope mainly has draining, supporting and retaining system, anchoring, loss of weight and back-pressure etc. at present.Wherein friction pile branch
Gear measure is controlled because its own has the advantages that rigidity is big, self-stability energy is preferable, easy for construction, consolidation effect is obvious on landslide
Extensive use is able in reason and slope protection project.Friction pile operation principle is mainly to be used by the embedding making of fixed section Rock And Soil
The Thrust of Landslide of free segment Rock And Soil or side slope soil pressure are balanced with passive resisting force, while by Rock And Soil between stake and stake both sides
Frictional resistance formed soil arching effect, prevent stake between Rock And Soil extruded between stake so that landslide or side slope keep balance or stably.
In the design of existing friction pile single pile, pile body is all generally vertical pile structure, fails to take into full account Rock And Soil before and after stake
The spatial distribution characteristic of comprehensive utilization and bending and shearing.When Thrust of Landslide or larger side slope soil pressure,
The measures such as prestress anchorage cable often are set using increase quantity of reinforcement or in pile body, to improve the anti-skid ability of friction pile itself, reached
To balance Thrust of Landslide or the purpose of side slope soil pressure.Increasing the measures such as quantity of reinforcement, not only quantities is big, treatment cost is high, easily
Engineering is caused to waste, and when by land red-line or existing construction of structures space constraint, site operation difficulty is larger, limitation
Effective use of traditional friction pile；Pile body sets prestress anchorage cable measure, because anchor cable cost is higher, working procedure is cumbersome,
And prestressd anchor cable increase over time easily produce relaxation loss, for it is permanent landslide or Reinforcement Works of Rock Slopes its can
It is substantially insufficient by property.As can be seen here, how to take into full account that the stress of the comprehensive utilization of Rock And Soil and friction pile pile body is special before and after stake
Sign, the section form and build of friction pile are rationally designed, be ten to cost-effective improvement major landslip and high steep vertical side slope
Divide important.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of friction pile based on the beam of uniform strength, can solve to grasp
Make the problems such as difficult, cost is high, anti-skid effect is bad, using the theory of the beam of uniform strength, can give full play to after stake and ground before stake
The anti sliding with load function of the gravity pressure of body, the anti-pressure ability of good ground and the stake of base expanding and base expanding section, it is strong to be effectively improved pile body stress
Degree, improves bending resistance and the shear resistance of friction pile, while has the effect of anti-slide mass concurrently, and engineering throwing is effectively saved by section optimal
Money.
In order to solve the above technical problems, technical scheme is used by the utility model：It is a kind of anti-based on the beam of uniform strength
Sliding pile,
Pile body including being embedded in gliding mass and basement rock；
Pile body is presented variable cross-section form along its length, and maximum through the position Shi Zhuan sections of sliding surface,
Pile body enters rock-soil layer from gliding mass position, through sliding surface after in embedded basement rock, the anchorage depth L0 depth of pile body >=
The 1/3 of the long L of total stake；
Predeformation packed layer is also filled between pile body and gliding mass.
Pile body is the pile body made of armored concrete pours.
Horizontal stroke, the vertical sectional shape of pile body are rectangle, and the stake top and stake basal cross section width B1 of pile body are identical, the side of pile body
Length H1 keeps constant, and the width B2 through the position Shi Zhuan sections of sliding surface is 1.5-2 times of B1.
Predeformation packed layer is preferably soil layer, or gravelly soil, compaction in layers.
A kind of construction method of the above-mentioned friction pile based on the beam of uniform strength, this method comprise the following steps：
Step 1：Pile body pore-forming：Using artificial vertical digging mode in gliding mass and basement rock pore-forming, often open in pore forming process
Dig one section and pour one section of reinforced concrete core-tube, circulation construction to pile body floor design absolute altitude；
Step 2：Pile body fabrication of reinforcing cage is installed：Pile body steel reinforcement cage is welded using usual manner outside stake holes, pile body
Stirrup 2 meters of scopes above and below the joint through sliding surface are encrypted, after completing using crane by pile body reinforcing bar cage hoisting extremely
It is fixed in the stake holes of excavation；
Step 3：Pile body steel reinforcement cage concreting；
Step 4：Fill predeformation packed layer：After treating that pile body pours completion and maintenance completion, hole before pile body is carried out
Fill compaction, predeformation packed layer is formed, pile body is produced a certain amount of deformation to landslide upper limb, it is anti-to gliding mass pre-add one
Sliding power, while friction pile can be reduced under the effect of later stage stand under load to the deflection of landslide lower edge,
Complete the construction of the friction pile based on the beam of uniform strength.
In step 1, the circulation construction is as follows：Every section of vertical cut is deep-controlled between 0.5 ~ 1 meter, breast wall concrete
Using C25 concrete, thickness is not less than 20 centimetres, and next section of excavation can be carried out after the completion of the preceding paragraph panelling construction.
A kind of friction pile based on the beam of uniform strength provided by the utility model, has the beneficial effect that：
1st, material is saved, improves the utilization rate of material to greatest extent；The bearing capacity of structure is improved, structure is more pacified
Entirely；Space is saved, reduces deadweight, improves the applicability of structure.
2nd, with reference to friction pile force modes and the spatial distribution characteristic of bending and shearing, the theory of the beam of uniform strength is utilized
Given full play to after stake and before stake the gravity pressure of Rock And Soil, the anti-pressure ability of good ground and base expanding and base expanding pile body anti sliding with load work(
Can, pile body stress intensity is effectively improved, improves bending resistance and the shear resistance of friction pile, while has the effect of anti-slide mass concurrently.
3rd, anti-slide pile structure form is simple, anti-skid performance is relatively strong, is easy to construct, and is not only suitable for high gradient slope or pattern foundation pit supporting structure
Engineering, it is also applied for major landslip harnessing project.
4th, citation form uses the construction method of artificial digging pile, the advantages of inheriting it, has bending resistance and shear resistance
Compared with the advantages that strong, construction technology is simple, reliability is high, low cost.
5th, can solve the problems such as operating difficulties, cost are high, anti-skid effect is bad.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the front view of the utility model pile body；
Fig. 3 is the left view of the utility model pile body；
Fig. 4 is the shearing distribution schematic diagram of the utility model pile body；
Fig. 5 is the Bending moment distribution schematic diagram of the utility model pile body；
Fig. 6 is the utility model construction procedure schematic diagram.
In figure：1- pile bodies, 2- stakes bottom, 3- stake tops, 4- gliding masses, 5- sliding surfaces, 6- basement rock, 7- predeformation packed layers, 8- stake holes,
9- pile body steel reinforcement cages.
Embodiment
Embodiment one
As Figure 1-3, a kind of friction pile based on the beam of uniform strength,
Pile body 1 including being embedded in gliding mass 4 and basement rock 6；
Pile body 1 is presented variable cross-section form along its length, and maximum through the position Shi Zhuan sections of sliding surface 5,
Pile body 1 enters rock-soil layer from the position of gliding mass 4, through sliding surface 5 after in embedded basement rock 6, the anchorage depth L0 of pile body 1 is deep
The 1/3 of degree >=long L of total stake；
Predeformation packed layer 7 is also filled between pile body 1 and gliding mass 4.
Pile body 1 is the pile body made of armored concrete pours.
Horizontal stroke, the vertical sectional shape of pile body 1 are rectangle, and the stake top 3 and the cross-sectional width B1 of stake bottom 2 of pile body 1 are identical, pile body 1
Side length H1 keep constant, the width B2 through the position Shi Zhuan sections of sliding surface 5 is 1.5-2 times of B1；
B1 length range is 2 ~ 3 meters, and H1 length range is 2 ~ 3 meters, and B2 length range is 3 ~ 4 meters.
The preferably soil layer, or gravelly soil of predeformation packed layer 7, compaction in layers.
As Figure 1-5, operation principle is：According to the theory of the beam of uniform strength, i.e.,：In order that the bending stress in each section
It is identical, then it should correspondingly change sectional dimension with the size of moment of flexure, to keep the beam of same intensity.Antiskid as shown in Figure 5
The bending moment diagram of stake pile body is visible, and moment of flexure of the friction pile at sliding surface is maximum, and male type is presented in shape, therefore the utility model will
Friction pile section increase at sliding surface, the effect of Thrust of Landslide is reasonably resistant to this.Meanwhile this patent has anti-slide mass concurrently
Effect, i.e.,：With the relatively weak landslide slip of concrete material displacement character, the shearing strength of sliding surface is improved, it is anti-skid so as to play
Effect, ensure the stable security that landslide is slided along geology slide strips.And poured in friction pile pile concrete and conserve completion
Afterwards, fill compaction is carried out to hole before stake, pile body is produced a certain amount of deformation to landslide upper limb, it is anti-to gliding mass pre-add one
Sliding power, while friction pile can be reduced under the effect of later stage stand under load to the deflection of landslide lower edge.
Embodiment two
As shown in fig. 6, a kind of construction method of the above-mentioned friction pile based on the beam of uniform strength, this method comprise the following steps：
Step 1：The pore-forming of pile body 1：Using artificial vertical digging mode in gliding mass 4 and basement rock 6 pore-forming, it is every in pore forming process
Excavate one section and pour one section of reinforced concrete core-tube, circulation construction to pile body floor design absolute altitude；
Step 2：The fabrication and installation of pile body steel reinforcement cage 9：Pile body steel reinforcement cage 9 is welded using usual manner outside stake holes 8, stake
Body stirrup 2 meters of scopes above and below the joint through sliding surface are encrypted, and are lifted pile body steel reinforcement cage 9 using crane after completing
It is fixed in the stake holes 8 of excavation；
Step 3：The concreting of pile body steel reinforcement cage 9；Friction pile pile body 1 is poured using pump concrete, in casting process
Per 0.5~0.7 meter of continuous pouring, using immersion vibrator vibration compacting 1 time, under immersion vibrator tumbling barrel or conduit mouth with
The distance in concreting face is preferably controlled between 1~3 meter
Step 4：Fill predeformation packed layer 7：After treating that pile body 1 pours completion and maintenance completion, hole before pile body 1 is entered
Row fill compaction, predeformation packed layer 7 is formed, pile body 1 is produced a certain amount of deformation to landslide upper limb, to the pre-add of gliding mass 4
One skid resistance, at the same can reduce friction pile later stage stand under load effect under to landslide lower edge deflection,
Complete the construction of the friction pile based on the beam of uniform strength.
In step 1, the circulation construction is as follows：Every section of vertical cut is deep-controlled between 0.5 ~ 1 meter, breast wall concrete
Using C25 concrete, thickness is not less than 20 centimetres, and next section of excavation can be carried out after the completion of the preceding paragraph panelling construction.
Refer to before the pile body 1 referred in embodiment two close to the side of landslide free face.
It may cause stress concentration in view of right angle base expanding and base expanding, chamfered can be carried out in construction.
Claims (2)
- A kind of 1. friction pile based on the beam of uniform strength, it is characterised in that：Including being embedded in gliding mass（4）And basement rock（6）Pile body（1）；Pile body（1）Cross-sectional width along its length changes from small to big and diminished again, and through sliding surface（5）Position Shi Zhuan sections most Greatly,Pile body（1）With gliding mass（4）Between be also filled with predeformation packed layer（7）.
- A kind of 2. friction pile based on the beam of uniform strength according to claim 1, it is characterised in that：Pile body（1）For by reinforcing bar Pile body made of concreting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720623309.5U CN207092110U (en) | 2017-06-01 | 2017-06-01 | A kind of friction pile based on the beam of uniform strength |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720623309.5U CN207092110U (en) | 2017-06-01 | 2017-06-01 | A kind of friction pile based on the beam of uniform strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439011A (en) * | 2019-09-04 | 2019-11-12 | 中国电建集团中南勘测设计研究院有限公司 | A kind of side slope antiskid supporting construction and its construction method |
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- 2017-06-01 CN CN201720623309.5U patent/CN207092110U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439011A (en) * | 2019-09-04 | 2019-11-12 | 中国电建集团中南勘测设计研究院有限公司 | A kind of side slope antiskid supporting construction and its construction method |
| CN110439011B (en) * | 2019-09-04 | 2024-01-30 | 中国电建集团中南勘测设计研究院有限公司 | Side slope anti-slip supporting structure and construction method thereof |
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