CN103669386B - Utilize the method that pile group bearing capacity is improved on U-shaped campshed basis - Google Patents
Utilize the method that pile group bearing capacity is improved on U-shaped campshed basis Download PDFInfo
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- CN103669386B CN103669386B CN201310742529.6A CN201310742529A CN103669386B CN 103669386 B CN103669386 B CN 103669386B CN 201310742529 A CN201310742529 A CN 201310742529A CN 103669386 B CN103669386 B CN 103669386B
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Abstract
The invention discloses a kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity, described pile group is made up of multiple rows of described campshed basis, described campshed basis is rearranged by some single piles, it is characterized in that described method to comprise the following steps: in described campshed basis between bottom each adjacent described single pile connecting arranging a crossbeam, to increase the bottom loaded area on described campshed basis, described stake crossbeam is made to be structure as a whole with described single pile.It is an advantage of the invention that, the pile group simple in construction should being made up of U-shaped campshed basis, by setting up the stake crossbeam connecting adjacent single pile in campshed foundation bottom, and by being additionally arranged at the bottom of bar shaped footing or semicircle footing at each single pile, to increase the overall pressure-bearing cross section on campshed basis, being effectively improved overall bearing capacity and the resistance to capsizing of pile group, compared with the conventional pile group basis with equal bearing capacity, single pile length is substantially shorter.
Description
Technical field
The invention belongs to pile foundation technical field, be specifically related to a kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity.
Background technology
Campshed basis is that it is big with bearing capacity, good stability, sedimentation value are little by the building pile basis structure of queue-type layout composition with certain pile-type, adapts to the features such as various geological conditions and load situation and be widely applied in building, the hydraulic engineerings such as skyscraper, large-sized workshop, water conservancy and hydropower hinge, railway engineering, highway engineering, science of bridge building, offshore production platform, nuclear power station.
Campshed basis is specifically collectively constituted by some foundation piles and the cushion cap being connected in stake top, for the bearing capacity enough for building thereon offer；The load of building passes to ground by pile foundation below, the frictional resistance that wherein vertical load is typically produced by the resistance of stake substratum and pile body side and the soil body supports, say, that pile foundation is broadly divided into end-bearing pile and friction pile two kinds by Force principle.
As it is shown in figure 1, end-bearing pile 1 reaches the hardest soil layer of hard formation 3(or rock stratum through Soft Soil Layer 2), the superstructure load of end-bearing pile 1 is mainly born by hard formation 3 resistance；Based on pile penetration during construction, pile top enters bearing stratum depth or pile top absolute altitude can make reference.
As shown in Figure 2, friction pile 4 is then disposed entirely within Soft Soil Layer 2, by its pile body by compacted for Soft Soil Layer 2 reality, to improve degree of compaction and the bearing capacity of soil, the load of its superstructure is born jointly by the frictional resistance between end-resistance and pile body side and Soft Soil Layer 2, to control pile top designed elevation during construction, pile penetration can make reference.
It has a problem in that existing for the pile group being made up of campshed basis at present: 1. in order to ensure it, upper building being provided that enough bearing capacities, the length requirement for pile body is very big, this not only adds the pressure in terms of construction cost, also improves the difficulty of construction；2. generally arranging coupling beam at adjacent foundation pile top to be connected with each other, to increase the stability in the large of pile group, but its effect is extremely limited, and relatively costly, affects the construction of upper building.
Summary of the invention
In place of it is an object of the invention to according to above-mentioned the deficiencies in the prior art, a kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity is provided, the method realizes being interconnected to constitute one by arranging crossbeam bottom each adjacent single pile, to provide the loaded area much larger than conventional campshed basis, improve pile group entirety stress-bearing capability.
The object of the invention realizes being completed by techniques below scheme:
A kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity, described pile group is made up of multiple rows of described campshed basis, described campshed basis is rearranged by some single piles, it is characterized in that described method to comprise the following steps: in described campshed basis between bottom each adjacent described single pile connecting arranging a crossbeam, to increase the bottom loaded area on described campshed basis, described stake crossbeam is made to be structure as a whole with described single pile.
Footing is set bottom described single pile, makes described footing and described single pile axis perpendicular.
The length making described footing is not more than for described single pile length.
Making described footing is strip, and centered by described single pile axis, is symmetrical arranged.
Making described footing is semicircle shape, and centered by described single pile axis, is symmetrical arranged.
It is an advantage of the invention that, the pile group simple in construction should being made up of U-shaped campshed basis, by setting up the stake crossbeam connecting adjacent single pile in campshed foundation bottom, and by being additionally arranged at the bottom of bar shaped footing or semicircle footing at each single pile, to increase the overall pressure-bearing cross section on campshed basis, being effectively improved overall bearing capacity and the resistance to capsizing of pile group, compared with the conventional pile group basis with equal bearing capacity, single pile length is substantially shorter.
Accompanying drawing explanation
Fig. 1 is end-bearing pile schematic diagram in prior art；
Fig. 2 is friction pile schematic diagram in prior art；
Fig. 3 is the partial elevation view on U-shaped campshed basis in the embodiment of the present invention one；
Fig. 4 is the partial plan layout on U-shaped campshed basis in the embodiment of the present invention one；
Fig. 5 is the overall elevation on U-shaped campshed basis in the embodiment of the present invention one；
Fig. 6 is the partial elevation view on U-shaped campshed basis in the embodiment of the present invention two；
Fig. 7 is the partial plan layout on U-shaped campshed basis in the embodiment of the present invention two；
Fig. 8 is the partial elevation view on U-shaped campshed basis in the embodiment of the present invention three；
Fig. 9 is the partial plan layout on U-shaped campshed basis in the embodiment of the present invention three.
Detailed description of the invention
Inventive feature and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, in order to the understanding of technical staff of the same trade:
Such as Fig. 1-9, in figure, labelling 1-9 is respectively as follows: end-bearing pile 1, Soft Soil Layer 2, hard formation 3, friction pile 4, single pile 5, stake crossbeam 6, campshed basis 7, bar shaped footing 8, semicircle footing 9.
Embodiment one: being currently used for providing a common problem existing for the pile group basis of enough bearing capacities for superstructure is exactly that bearing capacity is less and pile body length is bigger.As shown in Figure 5, in order to improve this phenomenon, present embodiments provide a kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity, described pile group is made up of multiple rows of campshed basis be arrangeding in parallel, and respectively organize campshed basis and rearranged by several single piles, most of pile body of each single pile is positioned in the soil body, relative to conventional campshed basis, the method of this raising pile group bearing capacity is by arranging a crossbeam 6 so that its interior each single pile 5 is connected bottom campshed basis 7, make it to provide the loaded area much larger than original campshed basis, and improve overall stress-bearing capability and the stability of pile group.
As shown in Fig. 3,4,5, the U-shaped campshed basis 7 in the present embodiment is rearranged by some single piles 5 goed deep in the soil body, and this method utilizing U-shaped campshed basis to improve pile group bearing capacity specifically includes following measures:
A crossbeam 6 is set bottom each adjacent single pile 5 so that being connected with each other between adjacent single pile 5, and is integrated pouring structure between each adjacent single pile 5 and stake crossbeam 6, finally make campshed basis 7 is constituted between each adjacent single pile 5 U-shaped structure；The most each single pile 5 is vertically arranged cylindrical pile body, and stake crossbeam 6 is then horizontally disposed cylindrical pile body, and the diameter of stake crossbeam 6 is identical with the diameter of single pile 5.
As shown in Fig. 3,4,5, for realizing the Specific construction step of the above-mentioned method utilizing U-shaped campshed basis to improve pile group bearing capacity it is:
First at separated by a distance two, ground uses the mode of mechanical hole building or manually digging hole to carry out vertical pore-forming, i.e. adjacent single pile 5 is carried out pore-forming；
2. in vertical hole, transferring cross drilling device after carrying out horizontal pore-forming so that connecting between adjacent vertical hole, i.e. stake crossbeam 6 is carried out pore-forming；
3., after treating pile hole construction, determine whether lower section arranges the specification of steel reinforcement cage and steel reinforcement cage, last casting concrete pile as required；
4. according to above-mentioned steps 1. to step 3. described in, remaining single pile in campshed basis is used same construction method, constitutes U-shaped campshed basis 7, and improve, with this, the bearing capacity that pile group is overall.
The present embodiment utilize the beneficial effect of method of U-shaped campshed basis raising pile group bearing capacity particularly as follows: the method by being additionally arranged at the bottom of the stake crossbeam of both connections at adjacent single pile, each single pile is not only made to be linked to be overall force structure, promote pile group holistic resistant behavior, provide the loaded area much larger than conventional pile group simultaneously, its bearing capacity is made to promote greatly, compared with the conventional pile group with equal bearing capacity, pile group length is substantially shorter.
Embodiment two: as shown in Figure 6,7, relative to the method utilizing U-shaped campshed basis raising pile group bearing capacity described in embodiment one, campshed basis in the present embodiment has been additionally arranged at the bottom of bar shaped footing 8 at each single pile 5, to increase loaded area on the basis of campshed basis described in embodiment one further, and promote the resistance to capsizing of pile group.
As shown in Figure 6,7, the U-shaped campshed basis 7 in the present embodiment is rearranged by some single piles 5 goed deep in the soil body, and this method utilizing U-shaped campshed basis to improve pile group bearing capacity specifically includes following measures:
(1) crossbeam 6 is set bottom each adjacent single pile 5 so that being connected with each other between adjacent single pile 5, and is integrated pouring structure between each adjacent single pile 5 and stake crossbeam 6, finally make campshed basis is constituted between each adjacent single pile 5 U-shaped structure；
(2) bottom each single pile 5, two perpendicular with stake crossbeam 6 bar shaped footing 8 it is respectively provided with, the both sides of 8 points of row stake crossbeams 6 of the two bar shaped footing, and the axis perpendicular of bar shaped footing 8 and single pile 5；Bar shaped footing 8 is cylindrical pile body, it is also possible to being barrette, the length of this bar shaped footing 8 is not more than the length of single pile 5, certainly suitably lengthens also dependent on soil property and requirement for bearing capacity.
As shown in Figure 6,7, the Specific construction step being used for realizing the above-mentioned method utilizing U-shaped campshed basis to improve pile group bearing capacity is:
First at separated by a distance two, ground uses the mode of mechanical hole building or manually digging hole to carry out vertical pore-forming, i.e. adjacent single pile 5 is carried out pore-forming,
2. in vertical hole, transferring cross drilling device after carrying out horizontal pore-forming so that connecting between adjacent vertical hole, i.e. stake crossbeam 6 is carried out pore-forming；
Carry out pore-forming by this cross drilling device in the direction perpendicular with stake crossbeam 6 hole the most again, i.e. bar shaped footing 8 is carried out pore-forming；
4., after treating pile hole construction, determine whether lower section arranges the specification of steel reinforcement cage and steel reinforcement cage, last casting concrete pile as required；
5. according to above-mentioned steps 1. to step 4. described in, remaining single pile in campshed basis is used same construction method, constitutes U-shaped campshed basis 7, and improve, with this, the bearing capacity that pile group is overall.
The present embodiment utilizes U-shaped campshed basis improve pile group bearing capacity method beneficial effect particularly as follows:
The method, by being additionally arranged at the bottom of the stake crossbeam of both connections at adjacent single pile, not only makes each single pile be linked to be overall force structure, promotes pile group holistic resistant behavior, provide the loaded area much larger than conventional pile group so that it is bearing capacity promotes greatly simultaneously；
In addition further increase the loaded area on campshed basis by the bar shaped footing that is additionally arranged at the bottom of at single pile, and by means of the interaction force between bar shaped footing and the soil body, can effectively promote its resistance to capsizing；
This pile group is compared with the conventional campshed basis with equal bearing value, and single pile length is substantially shorter.
Embodiment three: as shown in Figure 8,9, relative to the method utilizing U-shaped campshed basis raising pile group bearing capacity described in embodiment one, campshed basis in the present embodiment has been additionally arranged at the bottom of semicircle footing 9 at each single pile 5, to increase loaded area on the basis of campshed basis described in embodiment one further, and promote the resistance to capsizing that pile group is overall.
As shown in Figure 8,9, the U-shaped campshed basis 7 in the present embodiment is rearranged by some single piles 5 goed deep in the soil body, and this method utilizing U-shaped campshed basis to improve pile group bearing capacity specifically includes following measures:
(1) crossbeam 6 is set bottom each adjacent single pile 5 so that being connected with each other between adjacent single pile 5, and is integrated pouring structure between each adjacent single pile 5 and stake crossbeam 6, finally make campshed basis is constituted between each adjacent single pile 5 U-shaped structure；
(2) semicircle footing 9, the both sides of 9 points of row stake crossbeams 6 of the two semicircle footing are widened for two that level is set bottom each single pile 5；Semicircle footing 9 is structure as a whole with single pile 5, its semicircular radius is not more than the length of single pile 5, certainly its radius suitably lengthens also dependent on soil property and requirement for bearing capacity, obviously, the semicircle footing 9 in the present embodiment provides the pressure-bearing cross section bigger than bar shaped footing in embodiment two and stability against overturning energy.
As shown in Figure 8,9, the Specific construction step being used for realizing the above-mentioned method utilizing U-shaped campshed basis to improve pile group bearing capacity is:
First at separated by a distance two, ground uses the mode of mechanical hole building or manually digging hole to carry out vertical pore-forming, i.e. adjacent single pile 5 is carried out pore-forming；
2. in vertical hole, transferring cross drilling device after carrying out horizontal pore-forming so that connecting between adjacent vertical hole, i.e. stake crossbeam 6 is carried out pore-forming；
Carry out swinging reaming by this cross drilling device in the direction perpendicular with stake crossbeam 6 hole the most again and formed semicircle interval, i.e. semicircle footing 9 is carried out pore-forming；
4., after treating pile hole construction, determine whether lower section arranges the specification of steel reinforcement cage and steel reinforcement cage, last casting concrete pile as required；
5. according to above-mentioned steps 1. to step 4. described in, remaining single pile in campshed basis is used same construction method, constitutes U-shaped campshed basis 7, and improve, with this, the bearing capacity that pile group is overall.
It should be noted that the semicircle footing 9 in the present embodiment is not limited to the semicircle in 180 °, also include in the fan shape less than 180 °.
The present embodiment utilizes U-shaped campshed basis improve pile group bearing capacity method beneficial effect particularly as follows:
Should not only make each single pile be linked to be overall force structure, promote pile group holistic resistant behavior by being additionally arranged at the bottom of the stake crossbeam of both connections at adjacent single pile, provide the loaded area much larger than conventional pile group so that it is bearing capacity promotes greatly simultaneously；
In addition increase the pressure-bearing cross section on campshed basis further by the semicircle footing 9 that is additionally arranged at the bottom of at single pile 5, and by means of the interaction force between semicircle footing 9 and the soil body, can effectively promote the overall resistance to capsizing of pile group and stability；
This pile group is compared with the conventional pile group with equal bearing capacity, and pile group length is substantially shorter.
Claims (4)
1. one kind utilizes the method that pile group bearing capacity is improved on U-shaped campshed basis, described pile group is made up of multiple rows of described campshed basis, described campshed basis is rearranged by some single piles, it is characterized in that described method to comprise the following steps: in described campshed basis between bottom each adjacent described single pile connecting arranging a crossbeam, to increase the bottom loaded area on described campshed basis, described stake crossbeam is made to be structure as a whole with described single pile, footing is set bottom described single pile, makes described footing and described single pile axis perpendicular.
A kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity the most according to claim 1, it is characterised in that make the length of described footing be not more than for described single pile length.
A kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity the most according to claim 1, it is characterised in that making described footing is strip, and centered by described single pile axis, is symmetrical arranged.
A kind of method utilizing U-shaped campshed basis to improve pile group bearing capacity the most according to claim 1, it is characterised in that making described footing is semicircle shape, and centered by described single pile axis, is symmetrical arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310742529.6A CN103669386B (en) | 2013-12-30 | 2013-12-30 | Utilize the method that pile group bearing capacity is improved on U-shaped campshed basis |
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| CN201310742529.6A CN103669386B (en) | 2013-12-30 | 2013-12-30 | Utilize the method that pile group bearing capacity is improved on U-shaped campshed basis |
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| CN103669386B true CN103669386B (en) | 2016-08-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114376A (en) * | 1994-09-07 | 1996-01-03 | 张国梁 | Underground continuous wall and construction method thereof |
| CN1441124A (en) * | 2003-04-18 | 2003-09-10 | 雷玉华 | High-pressure rotary spraying and core inserting process to form pedestal pile |
| CN202007413U (en) * | 2011-03-30 | 2011-10-12 | 四川省电力公司眉山公司 | Cross-based electric pile |
| WO2011155619A1 (en) * | 2010-06-07 | 2011-12-15 | Ｊｆｅスチール株式会社 | Foundation pile group |
| CN102493475A (en) * | 2011-12-06 | 2012-06-13 | 牛伟民 | Lattice pile foundation and construction method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1519436A (en) * | 2003-01-22 | 2004-08-11 | 敏 黄 | Grouting base slab burdening pile with its pile tip and design method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114376A (en) * | 1994-09-07 | 1996-01-03 | 张国梁 | Underground continuous wall and construction method thereof |
| CN1441124A (en) * | 2003-04-18 | 2003-09-10 | 雷玉华 | High-pressure rotary spraying and core inserting process to form pedestal pile |
| WO2011155619A1 (en) * | 2010-06-07 | 2011-12-15 | Ｊｆｅスチール株式会社 | Foundation pile group |
| CN202007413U (en) * | 2011-03-30 | 2011-10-12 | 四川省电力公司眉山公司 | Cross-based electric pile |
| CN102493475A (en) * | 2011-12-06 | 2012-06-13 | 牛伟民 | Lattice pile foundation and construction method thereof |
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