CN206693258U - Hold type rigid pile composite foundation structure in a kind of end - Google Patents
Hold type rigid pile composite foundation structure in a kind of end Download PDFInfo
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- CN206693258U CN206693258U CN201720414039.7U CN201720414039U CN206693258U CN 206693258 U CN206693258 U CN 206693258U CN 201720414039 U CN201720414039 U CN 201720414039U CN 206693258 U CN206693258 U CN 206693258U
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Abstract
The utility model discloses a kind of end to hold type rigid pile composite foundation structure, and the structure includes basement rock, and basal surfaces are random fluctuation shape；It is argillic horizon above basement rock；It is mattress layer above argillic horizon, one group of rigid pile is provided with argillic horizon, the bottom of rigid pile, which enters in basement rock, is no less than 100mm；The pile body of rigid pile penetrates argillic horizon and stretches into mattress layer.Main force modes of the present utility model are that stake top is pierced into mattress layer, the deformation of stake end can be ignored, big using pile foundation construction difficulty in the higher strong karst area of level of ground water, easy for construction, the purpose of saving duration and cost can be realized using the composite foundation.
Description
Technical field
It the utility model is related to a kind of end and hold type rigid pile composite foundation structure, belong to foundation technical field.
Background technology
The rigid pile that composite foundation uses at present is generally CFG stakes and plain concrete pile, and mostly friction pile or end holds friction
Stake, in loading process stake be pierced into Rock And Soil downwards, top is pierced into the mattress layer of stake top upwards.But when building is located at strong rock
When molten regional, because level of ground water is higher, bedrock surface rises and falls big and multilayer shaped corroded cave model be present, builds skyscraper and uses stake
Base difficulty of construction and cost are very high, and skyscraper can be built after how such strong Karst Sites carries out basement process, are these
Art personnel's urgent problem to be solved.
Utility model content
The purpose of this utility model is, there is provided type rigid pile composite foundation structure is held at a kind of end, with for handle highland
Strong karsts developing area ground under lower water level conditions, and by the way that skyscraper can be built after processing, while provide construction such is multiple
The construction method of ground is closed, so as to overcome the deficiencies in the prior art.
What the technical solution of the utility model was realized in：
Type rigid pile composite foundation structure, including basement rock are held in a kind of end of the present utility model, and basal surfaces rise to be irregular
Lie prostrate shape；It is argillic horizon above basement rock；It is mattress layer above argillic horizon, one group of rigid pile, the bottom of rigid pile is provided with argillic horizon
100mm is no less than into basement rock；The pile body of rigid pile penetrates argillic horizon and stretches into mattress layer.
Foregoing end is held in type rigid pile composite foundation structure, and the mattress layer thickness is 250-300mm, and mattress layer is grading
Sand stone layer；The ratio of middle sand and rubble in graded sand and stone is 7:3, the maximum particle diameter of rubble is not more than 20mm.
Foregoing end is held in type rigid pile composite foundation structure, and the rigid pile is C25-C35 plain concrete piles, rigid pile
A diameter of 400-600mm.
Foregoing end is held in type rigid pile composite foundation structure, and the rigid pile stretches into the length of mattress layer according to rigid pile
Length determine；When rigid pile stake it is long more than 8m less than 12m when, rigid pile stake top stretches into mattress layer 50mm；When rigid pile stake is long
During more than 12m less than 18m, rigid pile stake top stretches into mattress layer 100mm；When rigid pile stake it is long more than 18m when, rigid pile stake top is stretched
Enter mattress layer 150mm.
Foregoing end is held in type rigid pile composite foundation structure, contains solution cavity in the basement rock, when Upper Plate of Karst Cave is thick in basement rock
When degree is less than 3 times of rigid pile diameters, rigid pile bottom is passed through solution cavity and is supported on solution cavity floor rocks.
By adopting the above-described technical solution, the utility model is compared with prior art, the utility model is to firm first
The application of property pile composite foundation is expanded, the utility model not quite alike with conventional rigid pile composite foundation stress
Adapt in strong karst foundation, bedrock surface big rise and fall, the high complex site of underground water.Conventional rigid stake compare compoundly
Base, this kind of composite foundation deformation adjustment are mainly stake top mattress layer, and single-pile stress pattern is end-bearing pile, and stake bottom deformation very little can be with
Ignore.Some local basement rock exposures, it can excavate to change using mattress layer after 500mm and fill out, for adjusting raft plate foundation settlement
Deformation.
Brief description of the drawings
Hold type rigid pile composite foundation structure structural representation in Fig. 1 the utility model end；
I-I profile in Fig. 2 Fig. 1；
II-II profile in Fig. 3 Fig. 1；
III-III profile in Fig. 4 Fig. 1；
Mark in accompanying drawing for：1- mattress layers, 2- rigid piles, 3- argillic horizons, 4- basement rock, 5- solution cavities.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples, but not as new to this practicality
Any restrictions of type.
Type rigid pile composite foundation structure is held at a kind of end of the present utility model, as Figure 1-4：Including basement rock 4, basement rock 4
Top surface is random fluctuation shape；The top of basement rock 4 is argillic horizon 3；The top of argillic horizon 3 is mattress layer 1, and one group is provided with argillic horizon 3
Rigid pile 2, the bottom of rigid pile 2, which enters in basement rock 4, is no less than 100mm；The pile body of rigid pile 2 penetrates argillic horizon 2 and stretches into mattress
Layer 1.The thickness of mattress layer 1 is 250-300mm, and mattress layer 1 is graded sand rock layers；The ratio of middle sand and rubble in graded sand and stone is
7:3, the maximum particle diameter of rubble is not more than 20mm.Rigid pile 2 is C25-C35 plain concrete piles, 2 a diameter of 400- of rigid pile
600mm.The length that rigid pile 2 stretches into mattress layer 1 determines according to the length of rigid pile 2；When rigid pile is 2 long more than 8m deficiencies
During 12m, the stake top of rigid pile 2 stretches into mattress layer 50mm；When rigid pile it is 2 long more than 12m less than 18m when, the stake top of rigid pile 2 stretches into
Mattress layer 100mm；When rigid pile it is 2 long more than 18m when, the stake top of rigid pile 2 stretches into mattress layer 150mm.Contain solution cavity in basement rock 4
5, when the top plate thickness of solution cavity 5 is less than 3 times of 2 diameters of rigid pile in basement rock 4, the bottom of rigid pile 2 passes through solution cavity 5 and is supported on solution cavity 5
On floor rocks.
A kind of construction method that type rigid pile composite foundation structure is held for above-mentioned end of the present utility model is this method bag
Include following steps：
Step 1: smooth location and determining rigid pile hole position；
Step 2: from top to bottom drilled into basement rock；
Step 3: cleaning eye bottom and carrying out rigid pile concreting；
Step 4: detection rigid pile pile body integrity；
Step 5: place topsoil is removed after detection is qualified to mattress layer bottom absolute altitude, and according to design stake top absolute altitude requirement
Clip the pile crown being higher by；
Step 6: carry out single pile and Pile Composite Foundation bearingtest；
Step 7: laying mattress layer.
During the step 1 smooth location, on the basis of the bottom absolute altitude for designing raft foundation, site elevation is higher by design raft
The bottom absolute altitude 100mm on plate basis, to prevent from causing to disturb to inter-pile soil layer in work progress.The step 2 uses XY-2B types
Engineering driller is drilled；Bottom hole should enter in basement rock, be managed and protected in boring procedure if there is collapse hole with mud off technique, set
Wall or foundation soil consolidation technique Reinforcing hole wall.During the step 3 rigidity pile concreting, stake top should exceed designed elevation
500mm；Clipped beyond part in step 5 according to design stake top absolute altitude requirement.During the step 7 laying mattress layer, use
Static pressure method once-paving.
Embodiment
The core of this example there is provided a kind of end and hold type rigid pile composite foundation structure, have preferably in strong karst area
Applicability.Additionally provide a kind of for building the construction method that type rigid pile composite foundation structure is held at above-mentioned end.
Below in conjunction with the accompanying drawing in this example, the technical scheme in this example is clearly and completely described, it is clear that institute
The embodiment of description is only part of the embodiment of the present utility model, rather than whole embodiments.Based on this example this area
All other embodiment that those of ordinary skill is obtained on the premise of creative work is not made, it is new to belong to this practicality
The scope of type protection.
Fig. 1~Fig. 4 is refer to, Fig. 1 is a kind of rigid pile composite foundation schematic diagram that the utility model embodiment provides；Figure
2 be that the profile of type rigid pile composite foundation structure I-I is held at the present embodiment end.Fig. 3 is that type rigid pile is held compoundly in the present embodiment end
The profile of based structures II-II.Fig. 4 is that the profile of type rigid pile composite foundation structure III-III is held at the present embodiment end.
Type rigid pile composite foundation structure, including mattress layer 1 and rigid pile 2 are held this example provides a kind of end, argillic horizon 3,
Horizon d 4 and solution cavity 5.Mattress layer 1 is layed in the top of rigid pile 2；Rigid pile 2 enters horizon d 4, base after penetrating argillic horizon 3
Solution cavity 5 in rock stratum 4 be present.Different according to field geology conditions, rigid pile 2, argillic horizon 3, horizon d 4 and solution cavity 5 can be present
Change.Specific stake is long and whether wears Upper Plate of Karst Cave depending on geological condition, and the utility model is not specifically limited.
The stake top above thickness of mattress layer 1 is 250~300mm in this example, and its main function is for adjusting rigid pile 2 and gluing
The stress deformation of soil layer 3, reach rigid pile and inter-pile soil and bear the upper load that raft foundation transmits, mattress layer material jointly
To be rolled using static(al), being the depth for entering mattress layer 1 by the stake top of rigid pile 2 for ease of construction stake top mattress layer thickness
Come what is realized.The gross thickness of mattress layer 1 is 300mm, when rigid pile it is 2 long more than 8m when, stake top enters bed course 50mm.Exceed
Stake end enters bed course 100mm during 12m.Stake top enters bed course 150mm during more than 18m.Mattress layer material uses graded sand and stone, in
Sand：Rubble is 7:3, the maximum particle of crushed stone is not more than 20mm.
A diameter of 400mm~600mm of rigid pile 2 in the present embodiment, pile shaft material are C25~C35 plain concrete, when
CFG can also so be used（CFG stakes）, pile strength not preferably less than C25.Stake end should enter in basement rock 4, and
It is not less than 100mm away from minimum side surface of bedrock.The mechanical characteristic of rigid pile 2 is end-bearing pile.
Argillic horizon 3 is the soil layer of this rigid pile composite foundation emphasis processing, because level of ground water is high, usual bearing capacity compared with
It is low, soft modeling even liquid-plastic state is presented, the surface undulation face of basement rock 4 is larger in addition, requires that rigid pile 2 penetrates this in processing procedure
Layer.When the local location break loses, it is not necessary to rigid pile 2 is set, bedrock surface directly is backbreak into 200mm using thickening mattress layer
Processing, meets deformation compatibility condition.
Basement rock 4 is the supporting course of rigid pile, is the necessary condition of the embodiment, and solution cavity 5 is developed in some positions, and rigid pile is
The no solution cavity that penetrates is determined by the superiors' Upper Plate of Karst Cave, and stake can be placed in top plate by Upper Plate of Karst Cave thickness when being not less than 3 times of stake footpaths
On.
The utility model embodiment provides a kind of for building the construction that type rigid pile composite foundation structure is held at above-mentioned end
Method, comprise the following steps：
1st, levelling of the land is to raft foundation bottom absolute altitude above 100mm is designed, and stake position unwrapping wire, it is anti-that site elevation, which reserves height,
Only inter-pile soil layer is disturbed in work progress.
2nd, it is drilled into using XY~2B type engineering drillers in basement rock 4, rig there must be embedding ability, when preventing that bedrock surface from rising and falling
There is drift stake, use mud off technique or sleeve pipe the retaining wall even work such as foundation soil consolidation in boring procedure if there is collapse hole
Skill.
3rd, clear bottom is clean after being drilled into designed elevation, and using conduit concrete placed under water, stake top should exceed design when pouring
Absolute altitude 500mm.
4th, after the completion of rigid pile 2 is constructed, detect pile body integrity, defect it is slight can select to verify for test pile, lack
Sunken serious should do over again.
5th, place topsoil is removed to mattress layer bottom absolute altitude after detection is qualified, and required according to design stake top absolute altitude by stake
Head is clipped, and is grown the interception different length of pile crown according to construction stake, should be marked and stake is cut after understanding, to prevent pile body to be damaged.
6th, the inspection of single pile and Pile Composite Foundation bearing capacity is carried out.
7th, the mattress layer at the top of rigid pile 2 is laid, using static pressure method once-paving.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (5)
1. type rigid pile composite foundation structure, including basement rock are held in a kind of end（4）, it is characterised in that：Basement rock（4）Top surface is irregular
It is undulated；Basement rock（4）Top is argillic horizon（3）；Argillic horizon（3）Top is mattress layer（1）, argillic horizon（3）Inside be provided with one group it is firm
Property stake (2), rigid pile（2）Bottom enter basement rock（4）In be no less than 100mm；Rigid pile（2）Pile body penetrate argillic horizon（2）
Stretch into mattress layer（1）.
2. type rigid pile composite foundation structure is held at end according to claim 1, it is characterised in that：The mattress layer（1）It is thick
Spend for 250-300mm, mattress layer（1）For graded sand rock layers；The ratio of middle sand and rubble in graded sand and stone is 7:3, rubble
Maximum particle diameter is not more than 20mm.
3. type rigid pile composite foundation structure is held at end according to claim 1, it is characterised in that：The rigid pile（2）For
C25-C35 plain concrete piles, rigid pile（2）A diameter of 400-600mm.
4. type rigid pile composite foundation structure is held at end according to claim 1, it is characterised in that the rigid pile（2）Stretch
Enter the length of mattress layer (1) according to rigid pile（2）Length determine；Work as rigid pile（2）Stake it is long more than 8m less than 12m when, rigidly
Stake（2）Stake top stretches into mattress layer 50mm；Work as rigid pile（2）Stake it is long more than 12m less than 18m when, rigid pile（2）Stake top stretches into mattress
Layer 100mm；Work as rigid pile（2）Stake it is long more than 18m when, rigid pile（2）Stake top stretches into mattress layer 150mm.
5. type rigid pile composite foundation structure is held at end according to claim 1, it is characterised in that：The basement rock（4）Include
There is solution cavity（5）, work as basement rock（4）Interior solution cavity（5）Top plate thickness is less than 3 times of rigid piles（2）During diameter, rigid pile（2）Bottom is passed through
Solution cavity（5）It is supported on solution cavity（5）On floor rocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414039.7U CN206693258U (en) | 2017-04-19 | 2017-04-19 | Hold type rigid pile composite foundation structure in a kind of end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414039.7U CN206693258U (en) | 2017-04-19 | 2017-04-19 | Hold type rigid pile composite foundation structure in a kind of end |
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| CN206693258U true CN206693258U (en) | 2017-12-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939611A (en) * | 2017-04-19 | 2017-07-11 | 贵州中建建筑科研设计院有限公司 | Hold type rigid pile composite foundation and its construction method in a kind of end |
| CN111827243A (en) * | 2020-06-10 | 2020-10-27 | 湖北文理学院 | A method for determining the thickness of a composite foundation mattress |
-
2017
- 2017-04-19 CN CN201720414039.7U patent/CN206693258U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939611A (en) * | 2017-04-19 | 2017-07-11 | 贵州中建建筑科研设计院有限公司 | Hold type rigid pile composite foundation and its construction method in a kind of end |
| CN111827243A (en) * | 2020-06-10 | 2020-10-27 | 湖北文理学院 | A method for determining the thickness of a composite foundation mattress |
| CN111827243B (en) * | 2020-06-10 | 2021-10-22 | 湖北文理学院 | A method for determining the thickness of a composite foundation mattress |
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