CN206157718U - Prefabricated pile cover suitable for soil cement lock pin composite pile composite foundation - Google Patents
Prefabricated pile cover suitable for soil cement lock pin composite pile composite foundation Download PDFInfo
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- CN206157718U CN206157718U CN201621179431.XU CN201621179431U CN206157718U CN 206157718 U CN206157718 U CN 206157718U CN 201621179431 U CN201621179431 U CN 201621179431U CN 206157718 U CN206157718 U CN 206157718U
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Abstract
The utility model provides a prefabricated pile cover suitable for soil cement lock pin composite pile composite foundation, includes the concrete top layer of once being pour into cask form by the concrete, the cross -section is fall character cut in bas -relief shape, embeds combined frame physically, characterized by in the concrete top layer the combined frame body includes steel sheet and reinforcing bar net piece, and the terminal surface of steel sheet is circular, and the central part and steel sheet welding, the bottom surface on concrete top layer of reinforcing bar net piece are provided with the central rubber pad mounting groove of direct steel sheet bottom surface, and steel sheet bottom surface and central rubber pad bond, it is provided with the annular rubber pad to encircle central rubber pad mounting groove periphery in the bottom surface on concrete top layer. The utility model discloses a prefabricated pile cover takes the mill prefabricated, has intensity height, simple structure, processing preparation convenient operation, cost low grade advantage, can realize the quick construction of the compound foundation pile cap of soil cement lock pin composite pile, shares soil cement stake and core pile's stress and plays fine regulating action.
Description
Technical field
This programme is related to the pile cover in foundation treatment engineering, and in particular to a kind of compound suitable for cement slotting built pile
The prefabricated pile cover of ground.
Background technology
Cement slotting built pile includes the composite pile of the various lock pins in cement earth pile, such as cement earth pile composite core
Stake, stiffness stake.
Cement slotting composite foundation of composite pile need to make pile cover when constructing at core stake top end, at present in terms of pile cover
Present Research is as follows：
（1）200820230810.6 the utility model is related to a kind of top used in highway engineering Soft foundation treatment
Load including carries steel plate to the composite concrete pile cap of the problem of transmission of bottom pile foundation, arranges at the middle part for carrying steel plate bottom surface
Put more energy into the collar, on steel plate bottom surface is carried, the outer radius of the collar of putting more energy into be provided with stiffened steel plates, in the collar of putting more energy into and stake top
Rubber sheet gasket is pasted with the carrying steel plate bottom surface of face contact, the rubber sheet gasket of the patent mainly solves to carry steel plate bottom surface and stake
The problem of stress concentration that top surface is likely to result in due to processing or construction error.
（2）The Chinese patent of Application No. 200910135359.9 discloses a kind of precast pile cap structure and its connected structure
Joint method, comprising body, beam column combining unit, foundation pile combining unit.The pile cover structure of invention is provided with through hole, this
Through hole also needs to carry out prefabricated pile process of binding after pile cover installation, and this mode causes the ultimate shear capacity of pile cover poor, easily makes
Coming off occurs in pile cover, and cumbersome.
（3）Application No. 201310030674.1 discloses a kind of flexible pile cap for composite foundation, including being laid in reinforcing pile
Horizontal base in stake top, many oblique loading bars being along the circumferential direction laid in above horizontal base and be laid in many it is oblique
Circular cuff on force rod；The Chinese patent of Application No. 201420723764.9 discloses a kind of pile tube pile cover construction, bag
Pile cover and pile tube are included, pile cover is arranged on the periphery on pile tube top, square steel reinforcement cage, the length of side of square steel reinforcement cage are equipped with pile cover
For the twice of pile tube diameter；This two patent pile covers are all that by way of field fabrication, the construction period is compared with prefabricated pile cover
It is longer.
（4）The Chinese patent of application number 201520481702.6 discloses a kind of precast concrete pile cover, including concrete
Cap body, card body and reinforcing bar support body, reinforcing bar support body includes steel bar stress mesh sheet and dowel.Can be with concrete cap body
At least one is provided with through whole card body and the location and installation hole of concrete cap body, location and installation hole is arranged on the axial model of card body
In enclosing.
（5）The Chinese patent of Application No. 201521116438.2 discloses a kind of prefabricated pile cover, and pile cover main body is reinforcing bar
Concrete prefabricated circular stake, the pre- round stake arrangement of reinforcement of armored concrete is using circumferential reinforcement and radial direction reinforcing bar cloth muscle；Application No.
201510119140.5 Chinese patent discloses a kind of composite foundation Prefabricated hollow pile pile cover and its fixing means, including by
Reinforced mesh is placed in the pile cover body poured in concrete, and reinforced mesh is a plurality of reinforcing bar cross weld formation with mesh
Network structure；The shoulder hole of insertion pile cover body is offered on pile cover body；This two patents are required for stake inner chamber at the scene to pour
Concrete is simultaneously conserved, and superiority of the prefabricated pile cover on the duration is not played completely.
（6）201610420237.4 this programme are related to a kind of stake and pile cover flexible connecting structure, including top steel plate, elasticity
Sleeve pipe, embedded steel plate and some WELDING STUDSs, can rotate against between pile crown and pile cover, increased the horizontal of top structure
Displacement allowance, meanwhile, the moment of flexure of stake also can be substantially reduced because of lateral displacement.
（7）The Chinese patent of Application No. 201610104685.3 discloses a kind of composite foundation assembled pile cover, it
Including top board and the fixed sleeve part being connected on top board downside, the patent simply carries out reinforcement to contact site, its connection
, easily there is local failure in limited strength.
At present, pile cover construction is mostly by the way of field fabrication, causes inefficiency, difficult quality guarantee, and after
Continuous curing time is long.With regard to prefabricated pile cover, it is insecure that existing related similar research yet suffers from the connection of pile cover structure, still need to into
Row concrete curing, the shortcomings of inconvenience is installed, the share stress of core stake and stake all soil cements is not accounted for.
The content of the invention
The purpose of this programme is to provide a kind of share stress to cement earth pile and core stake to play good adjustment effect,
Have the advantages that intensity height, simple structure, processing and fabricating be easy to operate, low cost, it is possible to achieve the soil cement of rapid construction is inserted
The prefabricated pile cover of core composite foundation of composite pile.
In order to achieve the above object, this programme adopts following technical proposals：It is a kind of multiple suitable for cement slotting built pile
The prefabricated pile cover of ground is closed, including, into barrel-shaped concrete surface layer, section is in undercut shape, mixed by concrete one-time-concreting
Built-in combined frame body in solidifying soil top layer, is characterized in that the combined frame body includes steel plate and reinforced mesh, the top surface of steel plate
It is circle with bottom surface, central part and the steel plate of reinforced mesh are welded, and the bottom surface of concrete surface layer is provided with straight-through steel plate bottom surface
Central rubber pad mounting groove, steel plate bottom surface is bonding with central rubber pad；In the bottom surface of concrete surface layer around central rubber pad
Mounting groove periphery is provided with ring-shaped rubber pad；Central rubber pad and core stake top end in contact, ring-shaped rubber pad is contacted with cement earth pile.
The concrete feature of this programme also has, and the concrete surface layer cavity heights are 50mm ~ 150mm；In concrete surface layer
The diameter in chamber is equal or slightly larger than cement earth pile stake footpath, and the internal diameter of concrete surface layer and the difference of external diameter are 100mm ~ 300mm.
The concrete surface layer also includes suspension ring, and the suspension ring are welded through concrete surface layer with steel plate.
The combined frame body is concentric with concrete surface layer, and the steel plate of the combined frame body is concentric with reinforced mesh, institute
Reinforced mesh external diameter is stated less than concrete surface layer external diameter 50mm ~ 150mm.
The central rubber pad is concentric with the steel plate of combined frame body, its generally circular in shape or annular, the ring-type rubber
Rubber cushion is concentric with concrete surface layer, and it is shaped as annular, and it is straight that annulus outside diameter is equal to or slightly less than concrete surface layer inner chamber
Footpath.
The central rubber pad meets below equation with the thickness of ring-shaped rubber pad：
（E 1 ：The elastic modelling quantity of central rubber pad；E 2 ：The elastic modelling quantity of ring-shaped rubber pad；σ：Cement earth pile stake top is suffered should
Power, no more than soil cement intensity value；n：Stress suffered by core stake stake top and cement earth pile stake top institute ratio stressed；χ：Core stake and water
The pile head settlement of soil stake is poor, according to field data, typically takes 2cm ~ 5cm；H：Central rubber mat thickness；h：Ring-shaped rubber pad is thick
Degree）.
The beneficial effect of this programme is：The pile cover has that intensity height, simple structure, processing and fabricating are easy to operate, construction is fast,
The advantages of low cost, the rapid construction of pile cover can be realized on the premise of construction quality is ensured, to cement earth pile and core stake
Share stress plays good adjustment effect.
Description of the drawings
Fig. 1 applies to the prefabricated pile cap schematic diagram of cement slotting composite foundation of composite pile；Fig. 2 is combined frame
The upward view of body；Fig. 3 is combined frame body A-A profiles；Fig. 4 is pile cover construction and installation schematic diagram.
In figure：1- concrete surface layers；2- combined frame bodies；3- central rubber pads；4- suspension ring；5- ring-shaped rubber pads；6- steel
Plate；7- reinforced mesh；8- core stakes；9- core stake tops end；10- cement earth piles；11- bed courses；12- undisturbed soils.
Specific embodiment
This programme is described further with reference to the accompanying drawings and examples：
As shown in Fig. 1 ~ 3, a kind of prefabricated pile cover suitable for cement slotting composite foundation of composite pile, including by concrete
Into barrel-shaped concrete surface layer 1, section is in undercut shape to one-time-concreting, the built-in combined frame body 2 in concrete surface layer 1,
The combined frame body 2 includes steel plate 6 and reinforced mesh 7, and the top surface of steel plate 6 and bottom surface are circle, the central portion of reinforced mesh 7
Position is welded with steel plate 6, and the bottom surface of concrete surface layer 1 is provided with the mounting groove of central rubber pad 3 of the bottom surface of straight-through steel plate 6, the bottom of steel plate 6
Face is bonding with central rubber pad 3；The mounting groove periphery of central rubber pad 3 is provided with ring-type rubber in the bottom surface of concrete surface layer 1
Rubber cushion 5.
Central rubber pad 3 is contacted with core stake top end 9, and ring-shaped rubber pad 5 is contacted with cement earth pile 10.
The cavity heights of concrete surface layer 1 are 50mm ~ 150mm；The diameter of the inner chamber of concrete surface layer 1 is equal or slightly larger than cement
10 footpaths of native stake, the internal diameter of concrete surface layer 1 and the difference of external diameter are 100mm ~ 300mm.
Concrete surface layer 1 also includes suspension ring 4, and the suspension ring 4 are welded through concrete surface layer 1 with steel plate 6.
Combined frame body 2 is concentric with concrete surface layer 1, and the steel plate 6 of the combined frame body 2 is concentric with reinforced mesh 7, institute
The external diameter of reinforced mesh 7 is stated less than the external diameter 50mm of concrete surface layer 1 ~ 150mm.
Central rubber pad 3 is concentric with the steel plate 6 of combined frame body 2, its generally circular in shape or annular, the ring-shaped rubber
Pad 5 is concentric with concrete surface layer 1, and it is shaped as annular, and it is straight that annulus outside diameter is equal to or slightly less than the inner chamber of concrete surface layer 1
Footpath.
As shown in figure 4, pile cover level mainly passes through the size and engineering Jing of site operation cement earth pile 10 to size
Test determination.By arranging not the central rubber pad 3 of equal thickness and ring-shaped rubber pad 5, cement earth pile 10 and core stake 8 can be adjusted
Share stress；The setting of rubber sheet gasket has taken into full account core stake 8, the compatibility of deformation of cement earth pile 10, stake week undisturbed soil 12, can be with
Preferably play the bearing capacity of cement slotting composite foundation of composite pile.Pile cover after installing will ensure around core stake 8
Below 1, carry out bed course 11 after pile cover installation again and construct, finally in concrete surface layer completely in the vertical direction of cement earth pile 10
Complete the construction of cement slotting composite foundation of composite pile.
The thickness of central rubber pad 3 and ring-shaped rubber pad 5 and cement earth pile 10 and the loading sharing of core stake 8, area of section,
The correlations such as the elasticity modulus of materials of rubber blanket.Central rubber pad 3 meets below equation with the thickness of ring-shaped rubber pad 5：
Wherein：E 1 ：The elastic modelling quantity of central rubber pad 3；E 2 ：The elastic modelling quantity of ring-shaped rubber pad 5；σ：Cement earth pile 10
The suffered stress in top, no more than soil cement intensity value；n：Stress suffered by the stake top of core stake 8 is stressed with the stake top of cement earth pile 10 institute
Than；χ：Core stake 8 is poor with the pile head settlement of cement earth pile 10, takes 2cm ~ 5cm；H：The thickness of central rubber pad 3；h：Ring-shaped rubber pad 5
Thickness.
So that core stake 8 is as pile tube as an example, the cement slotting composite foundation of composite pile of test parameters such as following table one is chosen.Table one
Test pile parameter
1. for 1#Stake：
It is 2cm, stress suffered by the stake top of core stake 8 and cement earth pile 10 that core stake 8 is estimated with the pile head settlement difference of cement earth pile 10
Stake top institute is stressed than being 4, to reach the ratio of above share stress, from the He of central rubber pad 3 that elastic modelling quantity is 10MPa
Ring-shaped rubber pad 5, during from the ring-shaped rubber pad 5 that thickness is 1cm, using the formula：
H=3.58cm is calculated, is 3.5cm from the thickness of central rubber pad.
2. for 2#Stake：
It is 3cm, stress suffered by the stake top of core stake 8 and cement earth pile 10 that core stake 8 is estimated with the pile head settlement difference of cement earth pile 10
Stake top institute is stressed than being 5, to reach the ratio of above share stress, from the He of central rubber pad 3 that elastic modelling quantity is 10MPa
Ring-shaped rubber pad 5, during from the ring-shaped rubber pad 5 that thickness is 1cm, using the formula：
H=4.2cm is calculated, is 4cm from the thickness of central rubber pad.
3. for 3#Stake：
It is 5cm, stress suffered by the stake top of core stake 8 and cement earth pile 10 that core stake 8 is estimated with the pile head settlement difference of cement earth pile 10
Stake top institute is stressed than being 10, to reach the ratio of above share stress, from the central rubber pad 3 that elastic modelling quantity is 20MPa
With ring-shaped rubber pad 5, from thickness for 1cm ring-shaped rubber pad 5 when, using the formula：
H=6.7cm is calculated, is 6.5cm from the thickness of central rubber pad.
Data are calculated according to more than, the thickness of central rubber pad 3 and ring-shaped rubber pad 5 is chosen, using core stake 8 after the pile cover
With the measured stress ratio and differential settlement such as following table two of the stake top of cement earth pile 10.
The measured stress ratio of table two and differential settlement
The Monitoring Datas such as the measured stress ratio and differential settlement by above cement slotting composite foundation of composite pile can be obtained：
By Rational choice central rubber pad 3 and the thickness of ring-shaped rubber pad 5, the prefabricated pile cover of this programme has reached expected load point
Load effect, can play good adjustment effect to the share stress of cement earth pile 10 and core stake 8.
Claims (6)
1. a kind of prefabricated pile cover suitable for cement slotting composite foundation of composite pile, including by concrete one-time-concreting into drum
The concrete surface layer of shape, section is in undercut shape, and the built-in combined frame body in concrete surface layer is characterized in that the combination bone
Support body includes steel plate and reinforced mesh, and the top surface of steel plate and bottom surface are circle, and central part and the steel plate of reinforced mesh are welded, mixed
The bottom surface on solidifying soil top layer is provided with the central rubber pad mounting groove of straight-through steel plate bottom surface, and steel plate bottom surface is bonding with central rubber pad；
Central rubber pad mounting groove periphery is provided with ring-shaped rubber pad in the bottom surface of concrete surface layer；Central rubber pad and core stake top
End in contact, ring-shaped rubber pad is contacted with cement earth pile.
2. the prefabricated pile cover suitable for cement slotting composite foundation of composite pile according to claim 1, is characterized in that institute
Concrete surface layer cavity heights are stated for 50mm ~ 150mm；The diameter of concrete surface layer inner chamber is equal or slightly larger than cement earth pile stake
Footpath, the internal diameter of concrete surface layer and the difference of external diameter are 100mm ~ 300mm.
3. the prefabricated pile cover suitable for cement slotting composite foundation of composite pile according to claim 1, is characterized in that institute
Stating concrete surface layer also includes suspension ring, and the suspension ring are welded through concrete surface layer with steel plate.
4. the prefabricated pile cover suitable for cement slotting composite foundation of composite pile according to claim 1, is characterized in that institute
State that combined frame body is concentric with concrete surface layer, the steel plate of the combined frame body is concentric with reinforced mesh, the reinforced mesh
External diameter is less than concrete surface layer external diameter 50mm ~ 150mm.
5. the prefabricated pile cover suitable for cement slotting composite foundation of composite pile according to claim 1, is characterized in that institute
State central rubber pad concentric with the steel plate of combined frame body, its generally circular in shape or annular, the ring-shaped rubber pad and coagulation
With one heart, it is shaped as annular on native top layer, and annulus outside diameter is equal to or slightly less than concrete surface layer intracavity diameter.
6. the prefabricated pile cover suitable for cement slotting composite foundation of composite pile according to claim 1, is characterized in that institute
State central rubber pad and meet below equation with the thickness of ring-shaped rubber pad：。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621179431.XU CN206157718U (en) | 2016-11-03 | 2016-11-03 | Prefabricated pile cover suitable for soil cement lock pin composite pile composite foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621179431.XU CN206157718U (en) | 2016-11-03 | 2016-11-03 | Prefabricated pile cover suitable for soil cement lock pin composite pile composite foundation |
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| CN206157718U true CN206157718U (en) | 2017-05-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436694A (en) * | 2016-11-03 | 2017-02-22 | 山东省建筑科学研究院 | Precast pile cap applicable to jet grouting soil-cement-pile strengthened pile composite foundation |
-
2016
- 2016-11-03 CN CN201621179431.XU patent/CN206157718U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436694A (en) * | 2016-11-03 | 2017-02-22 | 山东省建筑科学研究院 | Precast pile cap applicable to jet grouting soil-cement-pile strengthened pile composite foundation |
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Effective date of registration: 20200515 Address after: 250031 Shandong Province Flyover District of Ji'nan City Road 29. Co-patentee after: THE FIRST CONSTRUCTION CO., LTD. OF CHINA CONSTRUCTION EIGHTH ENGINEERING BUREAU Patentee after: Shandong Academy of Building Science Co., Ltd Address before: 250031 Shandong Province Flyover District of Ji'nan City Road 29. Co-patentee before: THE FIRST CONSTRUCTION CO., LTD. OF CHINA CONSTRUCTION EIGHTH ENGINEERING BUREAU Patentee before: SHANDONG PROVINCIAL ACADEMY OF BUILDING RESEARCH |