CN209323531U - A kind of double-row type foundation pit supporting construction - Google Patents
A kind of double-row type foundation pit supporting construction Download PDFInfo
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- CN209323531U CN209323531U CN201821974083.4U CN201821974083U CN209323531U CN 209323531 U CN209323531 U CN 209323531U CN 201821974083 U CN201821974083 U CN 201821974083U CN 209323531 U CN209323531 U CN 209323531U
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Abstract
The utility model relates to a kind of double-row type foundation pit supporting constructions, including forward and backward gang drill hole pouring pile, the stake top of the front row cast-in-situ bored pile is lower than heel row cast-in-situ bored pile, the stake top of forward and backward gang drill hole pouring pile is respectively arranged with top beam, is connected with several steel pipe diagonal braces between forward and backward two rows of top beams.The front row cast-in-situ bored pile is biting connecions cast-in-situ bored pile, and the pile body length of occlusion portion is not less than 200mm.Steel purlin is provided on the heel row cast-in-situ bored pile, the steel purlin is consistent with preceding collar depth of beam, and the steel purlin and top beam are connected with steel coupling beam.The bending resistance of the utility model is strong, can efficiently control foundation pit deformation, meets the requirement of Deformation control.For there is the base pit engineering for the requirement that intercepts water to no longer need to separately set water-stop curtain, cost is significantly reduced, the duration is shortened.
Description
Technical field
The utility model relates to double-row type foundation pit supporting constructions, belong to Foundation Pit Support Design and technical field of construction.
Background technique
Double-row pile gantry type supporting construction is common supporting type in base pit engineering.Traditional Retaining Structure with Double-row Piles is logical
It is often that in front two rows stake pile body, crown beam is set, and the sky that one of stake top coupling beam forms similar door frame is only set between front and rear row
Between structure, this can play jointly to a certain extent front and back campshed cooperative bearing effect.But traditional Double-row Piles Support
Structure has following deficiency:
(1) when the complex or stake of geological condition variation is long, connect together since double-row pile is only equipped in stake top
It connects, so that the line of deflection variation between the campshed of front and back may be inconsistent, this will leverage the bending resistance of double-row pile and whole
Body lateral rigidity.If adding anchor the bottom of double-row pile or solving the problems, such as this by way of adding support, need to consider anchor
Bar, anchor cable etc. influence on the underground piping of close to buildings, pipeline etc. or tear open the shadows such as support bring duration, cost and environment
It rings.
(2) for the base pit engineering that intercepts water of needs, since front and back campshed is using separate type deposited reinforced concrete pile,
Water-stop curtain can not be formed, so needing separately to set water-stop curtain.Therefore, this will increase working procedure and project cost, and not
Conducive to the control construction period.
(3) it is connected together since double-row pile is only equipped in stake top, is the actual soil body between the campshed of front and back, thus when stake is long
When the variation of too long or soil property is complex, the discontinuous, unreliable of the stress transmitting between front and rear row pile body will lead to, thus
Influence the safety of supporting construction.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of double-row type foundation pit supporting construction, it is able to ascend double
The overall stiffness and intensity of campshed have good bending resistance.
To solve the above-mentioned problems, the technical solution adopted in the utility model is as follows:
A kind of double-row type foundation pit supporting construction, including front-seat cast-in-situ bored pile and heel row cast-in-situ bored pile, the preceding gang drill
The stake top height of hole pouring pile is lower than heel row cast-in-situ bored pile, and forward and backward gang drill hole pouring pile is provided with top beam in stake top respectively,
Several steel pipe diagonal braces are connected between forward and backward two rows of top beams.
Above structure bending stiffness is big, can satisfy the requirement of Deformation control, since steel pipe diagonal brace is mounted between stake top,
Therefore do not have to earth excavation cross-operation, and facilitate construction, the steel pipe diagonal brace between two campsheds can effectively control heel row
The displacement of cast-in-situ bored pile stake top.
Further, in order to ensure supporting construction has good water-stagnating effect, the front row cast-in-situ bored pile is biting connecions
The pile body length of cast-in-situ bored pile, occlusion portion is greater than or equal to 200mm.
Further, in order to improve water-stagnating effect, the front row cast-in-situ bored pile and heel row cast-in-situ bored pile are biting connecions
The pile body length of cast-in-situ bored pile, occlusion portion is greater than or equal to 200mm.
Further, the biting connecions cast-in-situ bored pile uses the alternate snap-fit arrangement of reinforced concrete pile, or mixed using element
Coagulate soil stake snap-fit arrangement alternate with reinforced concrete pile.
Further, when biting connecions cast-in-situ bored pile snap-fit arrangement alternate with reinforced concrete pile using plain concrete pile,
Since the plain concrete bored concrete pile in preceding campshed is only used as the sealing part in supporting construction, the plain concrete pile and reinforcing bar are mixed
Length, the diameter of solidifying soil stake are identical.
Further, the length of the plain concrete pile, diameter are less than reinforced concrete pile.Occlusion portion meets length in this way
It is required that when, it with saving construction cost and can shorten the construction period.
Further, in order to guarantee to keep between forward and backward campshed effectively and uniformly stress transmitting, the heel row cast-in-situ bored pile
On be provided with steel purlin, the steel purlin is corresponding with the front-seat position of top beam, the steel purlin and front-seat top beam
It is connected with steel coupling beam.
Further, the steel pipe diagonal brace is parallel to each other and moves towards perpendicular with forward and backward two rows of top beams.
Further, the steel pipe diagonal brace is in the shape of the letter V setting between forward and backward two rows of top beams.
Compared with prior art, the utility model has the beneficial effects that:
1, the bending resistance of the utility model is strong, and the whole lateral rigidity of double-row pile greatly improves, and can efficiently control
Foundation pit deformation meets the requirement of Deformation control, and construction technology is simple, will not save the duration with earth excavation cross-operation.
2, it is attached between the campshed of front and back using steel pipe diagonal brace, steel coupling beam and steel purlin, between front and rear row pile body
Uniform force is reliable, ensure that the safety of supporting construction.It can be recycled after construction, not only reduce technical measures
Take, speed up the work, and realizes green construction.
3, preceding campshed uses the form of biting connecions cast-in-situ bored pile, for there is the base pit engineering for the requirement that intercepts water to no longer need to separately set
Water-stop curtain significantly reduces cost, shortens the duration.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of one preferred embodiment of the utility model.7 be the soil body, and 8 be grade.
Fig. 2 is biting connecions cast-in-situ bored pile elevational schematic view in one preferred embodiment of the utility model.
Fig. 3 is the sectional view that the first arrangement of steel pipe diagonal brace is located along Figure 1A-A in the utility model.
Fig. 4 is the sectional view that second of arrangement of steel pipe diagonal brace is located along Figure 1A-A in the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It is said according to following
Bright, the purpose of this utility model, technical solution and advantage will be apparent from.It should be noted that described embodiment is this
The preferred embodiment of utility model, instead of all the embodiments.
As shown in connection with fig. 1, a kind of double-row type foundation pit supporting construction, including front-seat cast-in-situ bored pile 1 and heel row drill-pouring
The stake top height of stake 2, the front row cast-in-situ bored pile 1 is lower than heel row cast-in-situ bored pile 2, and forward and backward gang drill hole pouring pile exists respectively
Stake top is provided with top beam 3, is connected with several steel pipe diagonal braces 4 between forward and backward two rows of top beams, steel pipe diagonal brace 4 is tied in construction
Recoverable after beam.The double-row type foundation pit supporting construction bending stiffness is big, can satisfy the requirement of Deformation control, and conveniently
Construction does not have to effectively control heel row cast-in-situ bored pile with earth excavation cross-operation, the steel pipe diagonal brace 4 between two rows of stake tops
The displacement of 2 stake tops.
In order to ensure supporting construction has good water-stagnating effect, the front row cast-in-situ bored pile 1 is that biting connecions drilling fills
Stake is infused, the pile body length of occlusion portion is greater than or equal to 200mm.Alternatively, the front row cast-in-situ bored pile 1 and rear row hole drilling fill
Note stake 2 is biting connecions cast-in-situ bored pile, and the pile body length of occlusion portion is greater than or equal to 200mm.It is drilled using biting connecions
The form of bored concrete pile significantly reduces cost, shortens for there is the base pit engineering for the requirement that intercepts water to no longer need to separately set water-stop curtain
Duration.
In conjunction with Fig. 2, the biting connecions cast-in-situ bored pile uses the alternate snap-fit arrangement of reinforced concrete pile, or mixed using element
Solidifying soil stake a snap-fit arrangement alternate with reinforced concrete pile b.
When biting connecions cast-in-situ bored pile snap-fit arrangement alternate with reinforced concrete pile using plain concrete pile, due to front row
Plain concrete bored concrete pile a in stake is only used as the sealing part in supporting construction, the plain concrete pile a and reinforced concrete pile
Length, the diameter of b is identical.Certainly, in order to saving construction cost and shorten the construction period, as long as length meets sealing and occlusion is not less than
The requirement of 200mm, the length of the plain concrete pile a, diameter are less than reinforced concrete pile b.
In order to guarantee to keep effectively and uniformly stress transmitting, with reference to Fig. 1, the heel row drill-pouring between forward and backward campshed
Steel purlin 5 is provided in stake 2, the steel purlin 5 is corresponding with the front-seat position of top beam 3, the steel purlin 5 and front row
Top beam 3 is connected with steel coupling beam 6.Steel purlin 5 can be recycled after construction with steel coupling beam 6, and the technology of reducing is arranged
It applies and takes and speed up the work.
In conjunction with Fig. 3, as two kinds of preferred forms, the steel pipe diagonal brace 4 is parallel to each other and walks with forward and backward two rows of top beams
To perpendicular；Alternatively, the arrangement of the steel pipe diagonal brace 4 ' can also be as shown in Figure 4, the setting that is in the shape of the letter V is on forward and backward two rows of tops
Between collar tie beam.
The above is only the description explanation of the preferred embodiment in the utility model, not to scope of protection of the utility model
Restriction, it is clear that anyone skilled in the art based on the above embodiment, can readily occur in replacement or variation to obtain
Other embodiments, these, which should all cover, is within the protection scope of the utility model.
Claims (9)
1. a kind of double-row type foundation pit supporting construction, including front-seat cast-in-situ bored pile (1) and heel row cast-in-situ bored pile (2), feature
It is:
The stake top height of the front row cast-in-situ bored pile (1) is lower than heel row cast-in-situ bored pile (2), forward and backward gang drill hole pouring pile point
Stake top is not provided with top beam (3), is connected with several steel pipe diagonal braces (4) between forward and backward two rows of top beams.
2. double-row type foundation pit supporting construction according to claim 1, it is characterised in that:
The front row cast-in-situ bored pile (1) is biting connecions cast-in-situ bored pile, and the pile body length of occlusion portion is greater than or equal to
200mm。
3. double-row type foundation pit supporting construction according to claim 1, it is characterised in that:
The front row cast-in-situ bored pile (1) and heel row cast-in-situ bored pile (2) are biting connecions cast-in-situ bored pile, occlusion portion
Pile body length is greater than or equal to 200mm.
4. double-row type foundation pit supporting construction according to claim 2 or 3, it is characterised in that:
The biting connecions cast-in-situ bored pile use the alternate snap-fit arrangement of reinforced concrete pile, or using plain concrete pile (a) with
The alternate snap-fit arrangement of reinforced concrete pile (b).
5. double-row type foundation pit supporting construction according to claim 4, it is characterised in that:
The plain concrete pile (a) is identical as the length of reinforced concrete pile (b), diameter.
6. double-row type foundation pit supporting construction according to claim 4, it is characterised in that:
The length of the plain concrete pile (a), diameter are less than reinforced concrete pile (b).
7. double-row type foundation pit supporting construction according to claim 1, it is characterised in that:
It is provided with steel purlin (5) on the heel row cast-in-situ bored pile (2), the position of the steel purlin (5) and front-seat top beam (3)
Set corresponding, the steel purlin (5) and front-seat top beam (3) are connected with steel coupling beam (6).
8. double-row type foundation pit supporting construction according to claim 1, it is characterised in that:
The steel pipe diagonal brace (4) is parallel to each other and moves towards perpendicular with forward and backward two rows of top beams.
9. double-row type foundation pit supporting construction according to claim 1, it is characterised in that:
The steel pipe diagonal brace (4) is in the shape of the letter V setting between forward and backward two rows of top beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974083.4U CN209323531U (en) | 2018-11-28 | 2018-11-28 | A kind of double-row type foundation pit supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974083.4U CN209323531U (en) | 2018-11-28 | 2018-11-28 | A kind of double-row type foundation pit supporting construction |
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| CN209323531U true CN209323531U (en) | 2019-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821974083.4U Active CN209323531U (en) | 2018-11-28 | 2018-11-28 | A kind of double-row type foundation pit supporting construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197312A (en) * | 2019-12-24 | 2020-05-26 | 上海建工集团股份有限公司 | L-shaped prestress pulling-anchoring engaged double-row pile foundation pit supporting structure and construction method thereof |
| CN111608188A (en) * | 2020-05-25 | 2020-09-01 | 上海建工集团股份有限公司 | Foundation pit supporting structure and construction method thereof |
-
2018
- 2018-11-28 CN CN201821974083.4U patent/CN209323531U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197312A (en) * | 2019-12-24 | 2020-05-26 | 上海建工集团股份有限公司 | L-shaped prestress pulling-anchoring engaged double-row pile foundation pit supporting structure and construction method thereof |
| CN111608188A (en) * | 2020-05-25 | 2020-09-01 | 上海建工集团股份有限公司 | Foundation pit supporting structure and construction method thereof |
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