CN1619065A - Composite ground and composite stake base of stake top setting full flexible stake pad and its construction method - Google Patents
Composite ground and composite stake base of stake top setting full flexible stake pad and its construction method Download PDFInfo
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- CN1619065A CN1619065A CN 200410093878 CN200410093878A CN1619065A CN 1619065 A CN1619065 A CN 1619065A CN 200410093878 CN200410093878 CN 200410093878 CN 200410093878 A CN200410093878 A CN 200410093878A CN 1619065 A CN1619065 A CN 1619065A
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Abstract
The present invention discloses a composite foundation whose file butt is equipped with flexible dolly and a composite pile foundation and its construction method. It includes interpile soil and pile set in said interpile soil, the upper end of pile is equipped with pile butt flexible dolly, and on the pile butt flexible dolly a plain concrete cushion is set, and on the upper end of said plain concrete cushion a building foundation is set. The material of said dolly is complete flexible material of foamed plastics, etc. Said invention also provides the steps of said construction method.
Description
Technical field
The present invention relates to composite foundation and composite pile foundation and job practices thereof, especially a kind of top is provided with complete flexible pile pad composite foundation and composite pile foundation, is applicable to civil engineering-foundation field.
Background technology
Immediate with the present invention is to utilize stake soil jointly to share composite foundation and the composite pile foundation of building vertical load.
Conventional composite foundation arranges the graded broken stone mattress layer of a layer thickness 100 ~ 300mm between stake top and basis, see Fig. 2; Its operation principle is to bring into play the inter-pile soil bearing capacity by stake top thrusting in the mattress layer, and mattress layer has again and reduces that a top stress is concentrated and the ability of horizontal loading is shared on the stake top.Such composite foundation is finished the construction of mattress layer because the existence of mattress layer is arranged, and the one, the certain economic expenditure should be arranged, take the construction period again; The 2nd, building buries darker place at underground water after being completed, in case there is water to infiltrate ground, water will be stretched everywhere along mattress layer, soak ground, causes composite foundation intensity to descend, and easily produces the ground accident.
Conventional composite pile foundation is that the stake top embeds in the building foundation, and the vertical load of stake and inter-pile soil shared building is seen Fig. 3.Its loading characteristic is by stake and inter-pile soil deform in same pace, for the superstructure of building provides bearing capacity.Its shortcoming is that the bearing capacity of bearing capacity and the stake of inter-pile soil is not easy synchronous performance, it is generally acknowledged that stake brings into play earlier its ultimate bearing capacity, and stake is worked under ultimate bearing capacity, and inter-pile soil could effectively be brought into play the effect of sharing then.
Utilize stake soil jointly to share composite foundation or the composite pile foundation of building vertical load, its related data all can be found in the paper of current specifications, rules and relevant composite foundation and composite pile foundation content.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency that prior art exists, and provides a kind of stake top of at first bearing load by inter-pile soil that the composite foundation and the composite pile foundation of complete flexible pile pad is set.Another technical problem to be solved by this invention is, provides a kind of stake top of at first bearing load by inter-pile soil that the composite foundation and the compound pile base construction method of complete flexible pile pad is set.For solving the problems of the technologies described above, stake of the present invention top is provided with flexible dolly composite foundation and composite pile foundation, comprise inter-pile soil and the stake that is arranged in the inter-pile soil, it is characterized in that, the upper end of described stake is provided with the flexible dolly in stake top, the flexible dolly in stake top is provided with plain concrete cushion layer, and the plain concrete cushion layer upper end is provided with the building foundation.
Described plain concrete cushion layer thickness is 100mm.
The material of the flexible dolly in described stake top is the full flexible material.Described full flexible material is a flexible cellular plastic.
For solving the problems of the technologies described above, stake of the present invention top arranges flexible dolly composite foundation and compound pile base construction method, comprises with step, finishes the pile body of stake by the pile facility and make in subsoil; Cleaning pile crown and inter-pile soil are reserved the space that flexible dolly is pushed up in stake on the stake top; Place the full flexible dolly on the stake top; The construction plain concrete cushion layer will guarantee the intact of the flexible dolly in upper stake top, stake top after the plain concrete cushion layer construction is complete; Finish at last the construction of building foundation 1.
Described plain concrete cushion layer thickness is 100mm.
The material of the flexible dolly in described stake top is the full flexible material.Described full flexible material is a flexible cellular plastic.
Compared with prior art, the present invention has following beneficial effect: (1) soil can clearly at first be born load, removes designer's misgivings, helps the disseminate technology advanced person, has composite foundation and composite pile foundation than the large economy benefit concurrently again; (2) at first bear load because inter-pile soil is clear and definite, and applying of the whole loads of building often needs the long period, therefore, inter-pile soil has been equivalent to the load precompressed, has realized preconsolidation; The composite foundation of composite foundation and composite pile foundation bearing capacity ratio routine and composite pile foundation bearing capacity height, settling amount are little; (3) saved composite foundation mattress layer expense; With the thick mattress layer of 300mm is example, and the Tianjin market price is 150 yuan/m
3, 45 yuan of every square metre of mattress layer costs.As promoting, will produce distinct economic, and can save a large amount of raw material in composite foundation field large tracts of land; (4) save the mattress layer construction period.
Description of drawings
Fig. 1 stake of the present invention top arranges flexible dolly composite foundation and composite pile foundation schematic diagram;
Conventional composite foundation schematic diagram in Fig. 2 prior art;
Conventional composite pile foundation schematic diagram in Fig. 3 prior art;
Reference numeral: 3 flexible dollys in top of the thick plain concrete cushion layer of 1 building foundation, 2 100mm
45 inter-pile soil 6 composite foundation mattress layers
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in detail.
Fig. 1 the figure shows out the characteristics of the flexible dolly in stake top for the stake top arranges flexible dolly composite foundation and composite pile foundation, has reflected that king-pile of the present invention top arranges the design philosophy of flexible dolly composite foundation and composite pile foundation.Fig. 2 is conventional composite foundation, has reflected the composite foundation design philosophy that mattress layer is arranged that generally adopts in the present prior art.Fig. 3 is conventional composite pile foundation, has reflected the composite pile foundation design philosophy that generally adopts in the present prior art.
Shown in Figure 1, stake of the present invention top arranges flexible dolly composite foundation and composite pile foundation, comprises inter-pile soil 5 and the stake 4 that is arranged in the inter-pile soil.The upper end of stake 4 is provided with the flexible dolly 3 in stake top, is provided with the plain concrete cushion layer 2 that thickness is 100mm on the flexible dolly 3 in stake top, and plain concrete cushion layer 2 upper ends are provided with building foundation 1.The material of the flexible dolly 3 in stake top is the full flexible materials such as flexible cellular plastic.
Stake of the present invention top arranges flexible dolly composite foundation and compound pile base construction method, comprises with step, finishes the pile body of stake by the pile facility and make in subsoil; Cleaning pile crown and inter-pile soil are reserved the space that flexible dolly is pushed up in stake on the stake top; Place the full flexible dolly on the stake top; The construction plain concrete cushion layer will guarantee the intact of the flexible dolly in upper stake top, stake top after the plain concrete cushion layer construction is complete; Finish at last the construction of building foundation 1.Plain concrete cushion layer thickness is 100mm.The material of the flexible dolly in stake top is the full flexible material, such as flexible cellular plastic etc.
The present invention has realized that with a kind of brand-new composite foundation and composite pile foundation design concept the stake top is provided with the design of complete flexible pile pad composite foundation or composite pile foundation, has cancelled the mattress layer that conventional composite foundation adopted.Compare with conventional composite foundation and composite pile foundation, its design concept is at first clearly to bring into play to principle take the subsoil soil bearing capacity, when the stake top is mainly born the load of increase and controlled sedimentation with having after basis (cushion cap) contacts again.The settlement of foundation computational methods of stipulating in available national regulation or the local rules are finished the calculating that full flexible dolly (being that its elastic modelling quantity can be similar to think to be zero) height is reserved on the stake top, calculate composite foundation and Composite Pile Foundation with composite foundation and Composite Pile Foundation formula in national regulation or the local rules; The construction process of this composite foundation and composite pile foundation is pile, cleaning pile crown and inter-pile soil, finishes a reservation headroom of pushing up flexible dolly, the flexible dolly of stake top top placement, pours into a mould the thick plain concrete cushion layer of 100mm, cast concrete basis.The present invention has realized the preconsolidation of inter-pile soil, has improved the intensity of inter-pile soil; Simultaneously, because inter-pile soil bearing load and can increase substantially the side resistance of stake at the normal pressure that the stake side produces at first, thereby the ultimate bearing capacity of stake improved.The stake top of using this method to finish arranges flexible dolly composite foundation and composite pile foundation design, and the stressed size of inter-pile soil is clear and definite; Solve stake and pushed up the design and construction that flexible dolly composite foundation and composite pile foundation are set; Reduced the horizontal force that stake top stress is concentrated and stake is born responsibility and carried on a shoulder pole; Provide stake and pushed up the detection method that flexible dolly composite foundation and composite pile foundation are set.
Determining of flexible pile bed hedgehopping degree reserved on stake of the present invention top:
According to geotechnical investigation data, national regulation or the local rules of project site, that determines composite foundation and composite pile foundation when design bearing capacity of foundation slab sends out the value of waving f
As, be worth as the substrate additonal pressure p in the natural ground settlement calculation under the building with this
0, calculating the settling amount s of natural ground under this additonal pressure, the s value is the height H that flexible dolly is reserved on the stake top.
Composite foundation of the present invention and composite pile foundation Design of Bearing Capacity and settlement calculation:
Composite foundation and Composite Pile Foundation calculate composite foundation and the Composite Pile Foundation computing formula that adopts in national regulation or the local rules.
The settlement calculation of composite foundation and composite pile foundation adopts composite foundation and composite pile foundation settlement formula in national regulation or the local rules; If composite foundation is rigid pile composite foundation, Composite Foundation Settlement also calculates and can calculate by the settlement formula of low cushion cap stake in national regulation or the local rules king-pile basis settlement calculation, and pile top load is the load that the composite foundation king-pile is born.
Composite foundation of the present invention and composite pile foundation detect:
Composite foundation is identical with existing national regulation or local rules with the composite pile foundation detection method, difference is when carrying out the composite foundation static load test, want to load precompressed in load plate earlier, when the deflection of precompressed after load plate reaches the height of the flexible dolly of stake top reservation, with the jack off-load, detect by normal detection of compound foundation method again.
The present invention reduces the horizontal force that a top stress is concentrated and stake is born:
Because the stressed front inter-pile soil of stake can clearly be born a part of load, in addition, can produce certain negative friction at the stake upper lateral part, the greatest axis power that makes pile body is positioned at stake pushes up certain depth, these two factors all can reduce the stress on stake top and concentrate.
When composite foundation and composite pile foundation suffer horizontal loads, produce frictional force between composite foundation and composite pile foundation end face and the bottom of foundation, because inter-pile soil shared area on composite foundation and composite pile foundation top planes is bigger, and there is the antifriction function of flexible dolly to exist on the stake top, therefore, the stake horizontal loading that is subjected to of bearing responsibility can reduce.
Beneficial effect of the present invention:
(1) soil can clearly at first be born load, removes designer's misgivings, is conducive to the disseminate technology advanced person, has concurrently than big warp again Composite foundation and the composite pile foundation of Ji benefit.
(2) at first bear load because inter-pile soil is clear and definite, and applying of building whole load often needs the long period, therefore, Inter-pile soil has been equivalent to the load precompressed, has realized preconsolidation; Composite foundation and Composite Pile Foundation than conventional composite foundation and Composite Pile Foundation height, settling amount are little.
(3) saved composite foundation mattress layer expense. Take the thick mattress layer of 300mm as example, the Tianjin market price is 150 yuan/m3, every 45 yuan of square metre mattress layer costs. As at composite foundation field spread, will produce distinct economic, and can save big The amount raw material.
(4) save the mattress layer construction period.
Claims (8)
1. a stake top is provided with flexible dolly composite foundation and composite pile foundation, comprise inter-pile soil and the stake that is arranged in the inter-pile soil, it is characterized in that the upper end of described stake is provided with the flexible dolly in stake top, the flexible dolly in stake top is provided with plain concrete cushion layer, and the plain concrete cushion layer upper end is provided with the building foundation.
2. stake according to claim 1 is pushed up flexible dolly composite foundation and composite pile foundation is set, and it is characterized in that described plain concrete cushion layer thickness is 100mm.
3. stake according to claim 1 is pushed up flexible dolly composite foundation and composite pile foundation is set, and it is characterized in that, the material of the flexible dolly in described stake top is the full flexible material.
4. stake according to claim 3 is pushed up flexible dolly composite foundation and composite pile foundation is set, and it is characterized in that described full flexible material is flexible cellular plastic.
5. a stake top arranges flexible dolly composite foundation and compound pile base construction method, it is characterized in that, may further comprise the steps,
(a) pile body of finishing stake by the pile facility in natural ground is made;
(b) cleaning pile crown and inter-pile soil are reserved the space that flexible dolly is pushed up in stake on the stake top;
(c) place the full flexible dolly on the stake top;
(the d plain concrete cushion layer of constructing will guarantee that a pile jacking pushes up the intact of flexible dolly after the plain concrete cushion layer construction is complete;
(e) finish the construction of building foundation 1 at last.
6. stake according to claim 5 is pushed up flexible dolly composite foundation and composite pile foundation is set, and it is characterized in that described plain concrete cushion layer thickness is 100mm.
7. stake according to claim 5 is pushed up flexible dolly composite foundation and composite pile foundation is set, and it is characterized in that, the material of the flexible dolly in described stake top is the full flexible material.
8. stake according to claim 7 is pushed up flexible dolly composite foundation and composite pile foundation is set, and it is characterized in that described full flexible material is flexible cellular plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410093878 CN1619065A (en) | 2004-12-09 | 2004-12-09 | Composite ground and composite stake base of stake top setting full flexible stake pad and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410093878 CN1619065A (en) | 2004-12-09 | 2004-12-09 | Composite ground and composite stake base of stake top setting full flexible stake pad and its construction method |
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| CN1619065A true CN1619065A (en) | 2005-05-25 |
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| CN 200410093878 Pending CN1619065A (en) | 2004-12-09 | 2004-12-09 | Composite ground and composite stake base of stake top setting full flexible stake pad and its construction method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371532C (en) * | 2005-08-16 | 2008-02-27 | 南京工业大学 | Pile foundation settlement adjustable bearing pile |
| CN1952921B (en) * | 2006-05-22 | 2010-08-11 | 黄广军 | A determination method of anticipated settlement in ground base |
| CN102535456A (en) * | 2011-12-27 | 2012-07-04 | 南京林业大学 | Back-anchored uplift pile with flexible pile top |
| CN102587355A (en) * | 2012-01-13 | 2012-07-18 | 佛山市顺德电力设计院有限公司 | Octagonal pile and foundation structure applying octagonal pile |
| CN103388342A (en) * | 2013-07-30 | 2013-11-13 | 大连市建筑设计研究院有限公司 | Composite foundation and design method thereof |
| CN103711139A (en) * | 2012-09-29 | 2014-04-09 | 上海中技桩业股份有限公司 | Semi-rigid connection structure between pile foundation and bearing platform |
| CN105976695A (en) * | 2016-06-15 | 2016-09-28 | 中国地质大学（武汉） | Teaching aid for calculating bearing capacity of pile group foundation according to physical deep foundation method |
| CN106703062A (en) * | 2017-01-18 | 2017-05-24 | 江苏卓典钻掘科技有限公司 | Non-continuous cushion layer composite foundation and construction method thereof |
| CN108775006A (en) * | 2018-06-09 | 2018-11-09 | 广东博意建筑设计院有限公司 | Pipe pile composite foundation |
-
2004
- 2004-12-09 CN CN 200410093878 patent/CN1619065A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371532C (en) * | 2005-08-16 | 2008-02-27 | 南京工业大学 | Pile foundation settlement adjustable bearing pile |
| CN1952921B (en) * | 2006-05-22 | 2010-08-11 | 黄广军 | A determination method of anticipated settlement in ground base |
| CN102535456A (en) * | 2011-12-27 | 2012-07-04 | 南京林业大学 | Back-anchored uplift pile with flexible pile top |
| CN102587355A (en) * | 2012-01-13 | 2012-07-18 | 佛山市顺德电力设计院有限公司 | Octagonal pile and foundation structure applying octagonal pile |
| CN102587355B (en) * | 2012-01-13 | 2015-07-15 | 广东顺德电力设计院有限公司 | Octagonal pile and foundation structure applying octagonal pile |
| CN103711139A (en) * | 2012-09-29 | 2014-04-09 | 上海中技桩业股份有限公司 | Semi-rigid connection structure between pile foundation and bearing platform |
| CN103388342A (en) * | 2013-07-30 | 2013-11-13 | 大连市建筑设计研究院有限公司 | Composite foundation and design method thereof |
| CN103388342B (en) * | 2013-07-30 | 2015-05-20 | 大连市建筑设计研究院有限公司 | Composite foundation and design method thereof |
| CN105976695A (en) * | 2016-06-15 | 2016-09-28 | 中国地质大学（武汉） | Teaching aid for calculating bearing capacity of pile group foundation according to physical deep foundation method |
| CN105976695B (en) * | 2016-06-15 | 2019-01-01 | 中国地质大学（武汉） | A kind of deep massive foundation method calculates the teaching aid of multi-column pier foundation bearing capacity |
| CN106703062A (en) * | 2017-01-18 | 2017-05-24 | 江苏卓典钻掘科技有限公司 | Non-continuous cushion layer composite foundation and construction method thereof |
| CN108775006A (en) * | 2018-06-09 | 2018-11-09 | 广东博意建筑设计院有限公司 | Pipe pile composite foundation |
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