CN209703487U - A kind of constructing device filled for composite pile foundation stake top cavity envelope - Google Patents
A kind of constructing device filled for composite pile foundation stake top cavity envelope Download PDFInfo
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- CN209703487U CN209703487U CN201920233053.6U CN201920233053U CN209703487U CN 209703487 U CN209703487 U CN 209703487U CN 201920233053 U CN201920233053 U CN 201920233053U CN 209703487 U CN209703487 U CN 209703487U
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Abstract
The utility model discloses a kind of constructing devices filled for composite pile foundation stake top cavity envelope: when stake top carries out second pouring, by slip casting bottom tube and main reinforcement firm welding and being cast in inside secondary stake top, nozzle is inserted into stake top cavity inside；Slip casting bottom tube outside foundation pile is embedded in foundation soil shallow-layer, and leads to ground by raft plate side.It is compared with traditional grouting method, the utility model can economically realize that work is closed in the slip casting to stake top cavity, it can guarantee that the globality of raft plate is not damaged and the smooth expansion of reinforcing bar binding work, reduction engineering cost improve working efficiency while ensuring slip casting effect.
Description
Technical field
The utility model relates to a kind of construction methods filled for stake top cavity envelope, and elasticity branch is arranged in particular for stake top
The stake top cavity of the composite pile foundation of seat, which seals, to be filled.
Background technique
With carrying forward vigorously for China's infrastructure, this ancient base form of pile foundation obtains unprecedented extensive
Using and development.The pile-raft foundation of one of main forms as pile foundation, equally quickly grows in recent years, stake raft foundation
Plinth has basic good integrity, bending resistance rigid as the term suggests referring to that the base form of superstructure load is born in stake and cushion cap jointly
The advantages that spending big, wide adaptability and being easy to implement pile soil common action.
It is directly rigidly connected between conventional pile-raft foundation stake-raft, overall stiffness is by raft panel stiffness and pile foundation support stiffness
It determines.For example certain reasons need to adjust raft rigidity, then raft panel stiffness can be adjusted by raft thickness, but often cost is higher；Pile foundation
Support stiffness can then be adjusted by changing the methods of long stake, stake diameter and pilespacing, but the side of laying out pile that piles with different diameter, piles with different are long
Formula is affected by upper structure type and geological conditions, and application range is severely limited.The new skill of composite pile foundation
Art, which is directed between stake top and raft plate, is arranged elastic support to adjust, optimize the support stiffness of stake raft, this measure may be implemented economy,
The overall stiffness of pile-raft foundation is effectively adjusted as needed.
Compared with conventional pile-raft foundation, the characteristics of composite pile foundation, is only that be provided in stake top and can artificially set on demand just
The elastic support of degree.Above-mentioned improvement makes one effectively, economically to intervene the overall stiffness of pile-raft foundation and provide possibility, while pole
The earth extends the application field of pile-raft foundation.From the current study, composite pile foundation can be used for following a variety of situations: 1.
Shallow layer foundation soil bearing capacity is higher, has certain Exploitative potential, and pile foundation type is that type area is held at end, need to consider that stake, soil are common
The case where effect.Such situation also known as holds and holds type stake composite pile foundation, is collectively referred to as with the conventional composite pile foundation for being applied to soft clay area
For generalized composite pile foundation；2. to reduce relative settlement and raft plate (cushion cap) internal force as the variable-rate leveling design of target；3. considering
The case where potential bearing capacity of the old pile foundation of building, new, old pile foundation shared superstructure load；4. under special geologic condition
Pile-raft foundation, such as the big rise and fall of building yard bedrock surface or missing and Soil-rock combined ground foundation soil support stiffness are seriously not
Uniform situation；5. the combination of above two or a variety of situations.
Using composite pile foundation form, in order to increase the durability of stake top, need after building settlement is stablized by stake top
Cavity carries out slip casting closing.Slip casting enclosure method traditional at present is mainly " up-drawing method ", i.e., by when elastic support is installed
The aperture on upper cover plate, Grouting Pipe and cover board firm welding simultaneously pass perpendicularly through the extraction of raft plate, and carry out slip casting.
" up-drawing method " traditional at present is the main slip casting enclosure method of composite pile foundation, has obtained a certain range of answer
With, but there are problems during engineering practice, are broadly divided into the following aspects:
1, Grouting Pipe and cover board weld connection, it is necessary to aperture and welding point are carried out on the cover board, and cover board is one to two
The steel plate of centimetre, rigidity is big, and aperture difficulty is big above it, the production cost greatly increased；The connector of welding on the cover board exists
It is not easy to protect during transport, is easily destroyed deformation, and be not easy to replace, this brings to the connection of later period Grouting Pipe and cover board
Great difficulty.
2, raft intralamellar part reinforcing bar is criss-cross, enormous amount, and " up-drawing method " is that Grouting Pipe is passed through raft plate to lead to ground
Face, therefore bring a great problem: reinforcing bar is not easy to bind！Before reinforcing bar binding, Grouting Pipe has been installed, then
Carry out assembling reinforcement " will obviously fight " with Grouting Pipe, it can be found that such as reinforcing bar is transferred and removed from previous Engineering Projects
The problems such as fortune is difficult, Grouting Pipe is miscued or even severed by reinforcing bar, causes steel bar arrangement uneven Wei Grouting Pipe position is avoided is repeatly
Secondary appearance.
3, it emerges at the top of Grouting Pipe raft plate 20cm or so, due to groundwater effect, the underground water in the front tube of slip casting closing
It continually can up gush, cause basement inside ponding serious, the decoration construction of this later period basement parking garage is brought very
Big inconvenience.
4, large number of Grouting Pipe is distributed in raft plate, although there is slurries filling in later period pipe, filling effect is obtained not
Globality to guarantee, raft plate is destroyed, and building service life is typically greater than 50 years, under long-term load action
With the presence or absence of some potential safety problems.
Summary of the invention
The purpose of the present invention is in view of the above shortcomings of the prior art, provide safe and reliable one kind, technical feasibility, economic conjunction
The envelope filling device for composite pile foundation stake top cavity of reason.
A kind of constructing device filled for composite pile foundation stake top cavity envelope, including one or more slip casting bottom tube, and
Foundation pile, cover board and the raft plate sequentially arranged from the bottom to top；The foundation pile include one-time-concreting pile body and it is secondary pour stake top, it is described
One-time-concreting pile body pours stake top and is connected and fixed by main reinforcement with secondary；It is described secondary to pour the sky formed between stake top and cover board
Chamber is stake top cavity, more than one stake top support built in stake top cavity, the top connecting cover plate of stake top support, bottom connection two
Secondary casting stake top；The cover board top surface is connect with raft board bottom portion, and the side of cover board is wrapped up by foundation soil and concrete cushion, is mixed
Solidifying soil padding, foundation soil from top to bottom stack arrangement, the gap between the side and concrete cushion and foundation soil of cover board
It is tamped by back-up sand at place；The slip casting bottom tube includes pipe shaft, stock inlet and grout outlet positioned at pipe shaft both ends；Stock inlet and outside
Connection, pipe shaft through it is secondary pour stake top after, grout outlet is inserted into stake top cavity, slip casting bottom tube and main reinforcement firm welding.
The present invention has been saved cost, has also ensured lid by the slip casting bottom tube of setting descending type without burrowing on the cover board
The integrality of plate；In addition, the position of slip casting bottom tube changes, will not be rushed with what the bar construction of raft intralamellar part was installed
It is prominent, not only make engineering be easier to promote, also solves the problems, such as that arrangement is uneven；Again, slip casting bottom tube is no longer on raft plate,
Before slip casting closing, can not generate underground water in pipe again continually can up gush, and cause ponding inside basement serious
Problem facilitates subsequent construction；Finally, filling effect is also more stable.The side of cover board is by foundation soil and concrete cushion packet
It wraps up in, also for slip casting bottom tube is easily installed, reduces difficulty of construction, guarantee the quality of construction.The present invention program is built in construction
The base form built uses composite pile foundation, and stake top support is located at cavity inside, and posterior settlement needs to seal cavity after stablizing
It fills.Compared with existing " up-drawing method ", 32% is improved using the stability of mode filling effect of the present invention, and cost reduces
About 50%.
It is described secondary to pour stake preferably, one-time-concreting pile body top surface is located at 20cm-30cm under concrete cushion
Top surface is located at 5cm-10cm under concrete cushion；The slip casting bottom tube pipe shaft pours stake top lower part 5cm-15cm, institute positioned at secondary
State slip casting bottom tube grout outlet insertion cavity inside 5cm-10cm.
Preferably, the slip casting bottom tube internal diameter is 2.5cm, 3.2cm or 4.0cm.
Preferably, the slip casting bottom tube pipe shaft also extends through foundation soil, and ground and outside are led to by raft plate side
Connection.
The utility model has the advantages that a kind of constructing device filled for composite pile foundation stake top cavity envelope disclosed by the invention, economy are closed
Reason ground, which is realized, closes work to the slip casting of stake top cavity, while ensuring slip casting effect, can guarantee the globality of raft plate not by
It destroys and the smooth expansion of reinforcing bar binding work, reduction engineering cost improves working efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the encapsulating device of traditional " up-drawing method ".
Fig. 2 is a kind of the schematic diagram of the section structure of the envelope filling device for stake top cavity of the present invention.
Fig. 3 is a kind of planar structure schematic diagram of the envelope filling device for stake top cavity of the present invention.
In figure: 1, raft plate, 2, stake top cavity, 3, elastic support, 4, novel slurry filling bottom tube, 5, concrete cushion, 6, ground
Soil, 7, back-up sand, 8, main reinforcement, 9, secondary pour stake top, 10, foundation pile, 11, one-time-concreting pile body.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
As shown in Figure 1, slip casting bottom tube 4 from top to bottom sequentially passes through raft plate 1, lid in the encapsulating device of existing " up-drawing method "
It is protruded into after plate 12 in cover board 12 and the secondary stake top space 2 poured between stake top 9, problem is:
1, slip casting bottom tube 4 will run through cover board 12, it is necessary to aperture and welding point are carried out on cover board 12, and cover board 12 is one
To two centimeters of steel plate, rigidity is big, and aperture difficulty is big above it, the production cost greatly increased；It is welded on cover board 12
Connector is not easy to protect during transportation, is easily destroyed deformation, and is not easy to replace, this gives later period slip casting bottom tube 4 and cover board
12 connection brings great difficulty.
2,1 inside reinforcing bar of raft plate is criss-cross, enormous amount, and " up-drawing method " is that slip casting bottom tube 4 is passed through raft plate 1 to draw
To ground, therefore bring a great problem: reinforcing bar is not easy to bind！Before reinforcing bar binding, slip casting bottom tube 4 has been installed
Finish, then carry out assembling reinforcement " will obviously fight " with slip casting bottom tube 4, it can be found that such as steel from previous Engineering Projects
Muscle decentralization is miscued or even is severed by reinforcing bar, causes reinforcing bar cloth Wei 4 position of slip casting bottom tube is avoided with difficult, slip casting bottom tube 4
Setting the problems such as uneven repeatedly occurs.
3, it emerges at the top of slip casting bottom tube 4 the about 20cm of raft plate 1, due to groundwater effect, the underground in the front tube of slip casting closing
Water continually can up gush, and cause basement inside ponding serious, this brings to the decoration construction of later period basement parking garage
Big inconvenience.
4, large number of slip casting bottom tube 4 is distributed in raft plate 1, although having slurries filling, filling effect in later period pipe
It cannot be guaranteed, the globality of raft plate 1 is destroyed, and building service life is typically greater than 50 years, long-term load
Effect is lower to whether there is some potential safety problems.
It is as Figure 2-3: filling device to be sealed for the present invention, including one or more slip casting bottom tube 4, and from the bottom to top sequentially
Foundation pile 10, cover board 12 and the raft plate 1 of arrangement.
The foundation pile 10 include one-time-concreting pile body 11 and it is secondary pour stake top 9, the one-time-concreting pile body 11 with it is secondary
Stake top 9 is poured to be connected and fixed by main reinforcement 8；The secondary cavity formed between stake top 9 and cover board 12 that pours is stake top cavity
2, more than one stake top support 3 built in stake top cavity 2, the top connecting cover plate 12 of stake top support 3, bottom connects second pouring
Stake top 9；12 top surface of cover board is connect with 1 bottom of raft plate, and the side of cover board 12 is wrapped up by foundation soil 6 and concrete cushion 5,
Concrete cushion 5, foundation soil 6 from top to bottom stack arrangement, the side of cover board 12 and concrete cushion 5 and foundation soil 6 it
Between gap location tamped by back-up sand 7；The slip casting bottom tube 4 includes pipe shaft, stock inlet and grout outlet positioned at pipe shaft both ends；Into
Slurry mouth be connected to external, pipe shaft through it is secondary pour stake top 9 after, in grout outlet insertion stake top cavity 2, slip casting bottom tube 4 and main reinforcement 8
Firm welding.
The base form of building preferably uses composite pile foundation, and stake top support 3 is elastic support, and posterior settlement needs pair after stablizing
Stake top cavity 2 carries out envelope filling.
11 top surface of one-time-concreting pile body is located at 20cm-30cm under the face of the concrete cushion 5, described secondary to pour
The top surface face of stake top 9 is located at 5cm-10cm under the face of the concrete cushion 5.
4 pipe shaft of slip casting bottom tube pours 5cm-15cm under 9 face of stake top, the grout outlet insertion of slip casting bottom tube 4 positioned at secondary
2 inside 5cm-10cm of stake top cavity.
The internal diameter of the slip casting bottom tube 4 is 2.5cm, 3.2cm or 4.0cm, and the slip casting bottom tube outside the foundation pile 10 is located at
6 shallow-layer of foundation soil, and ground is led to by the side of raft plate 1.
It should be pointed out that for those skilled in the art, before not departing from the utility model principle
It puts, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.The present embodiment
In the available prior art of each component part that is not known realized.
Claims (4)
1. a kind of constructing device filled for composite pile foundation stake top cavity envelope, it is characterised in that: including one or more slip casting
Bottom tube, and foundation pile, cover board and the raft plate sequentially arranged from the bottom to top；
The foundation pile include one-time-concreting pile body and it is secondary pour stake top, the one-time-concreting pile body passes through with the secondary stake top that pours
Main reinforcement is connected and fixed；
The secondary cavity formed between stake top and cover board that pours is stake top cavity, more than one stake top built in stake top cavity
Support, the top connecting cover plate of stake top support, bottom connect second pouring stake top；
The cover board top surface is connect with raft board bottom portion, and the side of cover board is wrapped up by foundation soil and concrete cushion, concrete mats
Layer, foundation soil from top to bottom stack arrangement, and the gap location between the side and concrete cushion and foundation soil of cover board passes through
Back-up sand is tamped；
The slip casting bottom tube includes pipe shaft, stock inlet and grout outlet positioned at pipe shaft both ends；Stock inlet is connected to outside, and pipe shaft passes through
Wear it is secondary pour stake top after, grout outlet is inserted into stake top cavity, slip casting bottom tube and main reinforcement firm welding.
2. a kind of constructing device filled for composite pile foundation stake top cavity envelope according to claim 1, it is characterised in that:
One-time-concreting pile body top surface is located at 20cm-30cm under concrete cushion, and the secondary stake top face that pours is located at concrete mats
The lower 5cm-10cm of layer；The slip casting bottom tube pipe shaft pours stake top lower part 5cm-15cm, the slip casting bottom tube grout outlet positioned at secondary
It is inserted into cavity inside 5cm-10cm.
3. a kind of constructing device filled for composite pile foundation stake top cavity envelope according to claim 1, it is characterised in that:
The slip casting bottom tube internal diameter is 2.5cm, 3.2cm or 4.0cm.
4. a kind of constructing device filled for composite pile foundation stake top cavity envelope according to claim 1, it is characterised in that:
The slip casting bottom tube pipe shaft also extends through foundation soil, and leads to ground by raft plate side and be connected to outside.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820526355 | 2018-04-13 | ||
| CN2018205263558 | 2018-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209703487U true CN209703487U (en) | 2019-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920233053.6U Active CN209703487U (en) | 2018-04-13 | 2019-02-25 | A kind of constructing device filled for composite pile foundation stake top cavity envelope |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577317A (en) * | 2018-04-13 | 2019-04-05 | 常熟理工学院 | A kind of constructing device filled for composite pile foundation stake top cavity envelope |
| CN112252105A (en) * | 2020-10-10 | 2021-01-22 | 中铁四院集团工程建设有限责任公司 | Method for treating void at bottom of raft plate of roadbed pile raft structure |
-
2019
- 2019-02-25 CN CN201920233053.6U patent/CN209703487U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577317A (en) * | 2018-04-13 | 2019-04-05 | 常熟理工学院 | A kind of constructing device filled for composite pile foundation stake top cavity envelope |
| CN112252105A (en) * | 2020-10-10 | 2021-01-22 | 中铁四院集团工程建设有限责任公司 | Method for treating void at bottom of raft plate of roadbed pile raft structure |
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