CN210194604U - Stirring grooving insertion type combined prefabricated special-shaped section composite foundation structure - Google Patents
Stirring grooving insertion type combined prefabricated special-shaped section composite foundation structure Download PDFInfo
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- CN210194604U CN210194604U CN201920376488.6U CN201920376488U CN210194604U CN 210194604 U CN210194604 U CN 210194604U CN 201920376488 U CN201920376488 U CN 201920376488U CN 210194604 U CN210194604 U CN 210194604U
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- 238000003756 stirring Methods 0.000 title claims abstract description 58
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000003780 insertion Methods 0.000 title claims description 9
- 230000037431 insertion Effects 0.000 title claims description 8
- 239000002689 soil Substances 0.000 claims abstract description 51
- 238000002156 mixing Methods 0.000 claims abstract description 49
- 239000004568 cement Substances 0.000 claims abstract description 22
- 230000007704 transition Effects 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000011178 precast concrete Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 22
- 239000004567 concrete Substances 0.000 abstract description 7
- 230000006872 improvement Effects 0.000 abstract description 2
- 239000004570 mortar (masonry) Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000011083 cement mortar Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a stirring grooving bayonet combination prefabricated heterotypic cross-section composite foundation structure belongs to ground basis field. The structure comprises a plurality of stirring piles, wherein each stirring pile is embedded into a foundation in a round pile shape; all the stirring piles are arranged on the ground plane according to an H shape, and the adjacent stirring piles are mutually meshed and connected to form an H-shaped stirring tank in a continuous wall form; a precast slab is vertically inserted into each mixing pile, and the precast slabs in all the mixing piles are continuously spliced along the direction of the H-shaped mixing tank; in each mixing pile, cement soil is filled between the two sides of the precast slab and the foundation soil at the boundary of the mixing pile to serve as a transition layer. The utility model discloses the principle is simple reliable, and construction operation is simple and convenient, and suitable operating mode is extensive, receives the site operation condition influence less. The utility model discloses a compound foundation's bearing capacity compares with conventional basis, has improvement by a relatively large margin under the condition of using same volume concrete mortar, has fine application prospect.
Description
Technical Field
The utility model belongs to ground basis field, concretely relates to stirring grooving bayonet combination prefabricated abnormal shape cross-section composite foundation.
Background
The foundation construction is an important link in engineering construction, and has a great influence on the quality and economic benefit of the whole engineering. The precast concrete circular pipe pile has the advantages of high concrete strength of the pile body, good hammering resistance, short construction period, small influence on the environment, low unit bearing capacity cost and the like, and is widely applied to buildings and foundation engineering of the structures.
However, when the deep soft soil foundation is treated, the strength of soil around the pile is low, and the circular pipe pile has the defects of low pile side friction resistance and low single-pile bearing capacity. In order to improve the problem, researchers develop researches on the aspects of the cross section shape of the foundation, the interaction property of soil and a structure and the like, and attempt to develop a novel foundation type, so that the vertical and horizontal bearing capacity of the foundation in a deep soft soil area is improved while materials are saved. At present, most foundation forms have certain limitations when used in deep and soft soil areas, and the problem that the bearing capacity obtained by unit concrete materials is low is particularly important for developing a foundation form suitable for the deep and soft soil areas.
Disclosure of Invention
The utility model aims to solve present most basic forms and have certain limitation when dark weak soil area uses, the lower problem of bearing capacity that the unit concrete material used obtains to a stir the bayonet combination of grooving and prefabricate heterotypic cross-section composite foundation structure has been proposed.
The utility model provides a technical scheme that concrete technical problem adopted is:
a stirring-grooving insertion-type combined prefabricated special-shaped cross section composite foundation structure comprises a plurality of stirring piles, wherein each stirring pile is embedded into a foundation in a round pile shape; all the stirring piles are arranged on the ground plane according to an H shape, and the adjacent stirring piles are mutually meshed and connected to form an H-shaped stirring tank in a continuous wall form; a precast slab is vertically inserted into each mixing pile, and the precast slabs in all the mixing piles are continuously spliced along the direction of the H-shaped mixing tank; in each mixing pile, cement soil is filled between the two sides of the precast slab and the foundation soil at the boundary of the mixing pile to serve as a transition layer.
Preferably, the precast slab is a precast concrete slab or a precast steel plate.
Preferably, the bottom of the precast slab is sunk to the bottom of the mixing pile.
Preferably, the size of the H-shaped stirring tank is larger than that of the precast slab.
Preferably, the diameter of the mixing pile is 60cm, and the distance between the central lines of the adjacent mixing piles is 50 cm.
Preferably, the H-shaped stirring tank has a size of 960cm × 540 cm.
Preferably, the thickness of the prefabricated plate is 45 cm.
Preferably, the depth of the stirring pile is 1-5 m.
Preferably, the precast slabs are symmetrically distributed in the mixing pile, and the thickness of the cement soil filled at the two sides of the precast slabs is the same.
The utility model has the advantages as follows:
1. in the composite foundation, a cement soil transition layer exists between the precast slabs and the foundation soil, so that the contact relation and interaction property of the soil and the structure are improved, and the bearing capacity of the foundation soil can be better exerted. The combined action of the two causes the novel composite foundation to have larger bearing capacity and easier control of foundation top settlement when used in a weak land area.
2. The soil body in the stirring tank affected zone of the composite foundation is in a semi-closed state, and the drainage condition is extremely poor, so that the post-construction settlement is reduced, and the bearing performance of the composite foundation can be better exerted.
3. The prefabricated slab which is simple to manufacture can be used in the composite foundation, and the overall cost and the construction time are saved. And when the novel composite foundation is used in deep soft soil areas, the concrete amount used by the novel composite foundation is smaller than that of a conventional circular tube pile foundation under the condition of meeting the same bearing requirement, and the novel composite foundation is energy-saving and environment-friendly.
4. The composite foundation is simple in construction, can adopt a popular triaxial mixer for construction, and has low requirement on the verticality of the cement soil stirring tank.
Drawings
FIG. 1 is a schematic view of a stirring tank-forming insertion type combined prefabricated special-shaped section composite foundation structure;
FIG. 2 is a schematic view of a construction site location of a three-axis blender;
FIG. 3 is a schematic view of a stirred tank after construction is completed;
FIG. 4 is a schematic diagram of a stirring tank-forming insertion type combined prefabricated special-shaped section composite foundation.
The reference numbers in the figures are: mixing pile 1, cement soil 2, precast slab 3, and mixing tank affected zone 4.
Detailed Description
The invention will be further explained with reference to the drawings and the implementation steps,
as shown in fig. 1, in the embodiment, the main structure of the stirring tank-forming insertion-type combined prefabricated special-shaped cross section composite foundation structure includes a plurality of stirring piles 1. The mixing pile 1 is formed by mixing and rotating spraying of mixing machines such as a three-axis mixer, each mixing pile 1 is in a round pile shape, and the mixing piles are vertically driven into a foundation. However, in the foundation structure, the mixing pile 1 and the prefabricated plate 3 are combined together to form a composite foundation, so that the verticality requirement of the mixing pile is not required to be too high. However, all the mixing piles 1 need to be arranged in an H shape on the ground level, and the adjacent mixing piles are engaged with each other, so that the pile bodies of the mixing piles are connected with each other to form an underground continuous wall arranged in an H shape on the ground level, which is called as an H-shaped mixing tank. The utility model discloses in, need immerse prefabricated plate 3 in the H type stirred tank to improve the holistic bearing capacity of ground. Specifically, a prefabricated plate 3 is vertically inserted into each mixing pile 1, and the prefabricated plate 3 may be a precast concrete slab or a precast steel plate, which is selected according to actual needs. In order to ensure the bearing reliability of the pile, the bottom of the prefabricated plate 3 should be sunk into the bottom of the mixing pile. Moreover, the prefabricated plates 3 in all the mixing piles 1 need to be continuously spliced along the direction of the H-shaped mixing tank to form the state shown in FIG. 1. It should be noted that, a prefabricated plate can be sunk into each mixing pile, and then the adjacent prefabricated plates are spliced, or the same prefabricated plate with larger size can be sunk into two or more continuous tanks, which is not limited as long as a continuous body of prefabricated plates continuously spliced along the direction of the H-shaped mixing tank can be formed. The connection relation and the connection mode between each precast concrete (steel) plate can be determined according to specific construction requirements, and for example, the precast concrete (steel) plates can be spliced through a mortise and tenon structure or can be spliced through connecting pieces such as bolts.
Because the pile is filled with the cement soil 2 formed by mixing the foundation soil and the cement mortar in the process of forming each mixing pile, the two sides of the precast slab do not directly contact the foundation soil at the boundary of the side wall of the mixing pile after sinking. An interlayer is arranged between the two sides of the precast slab and the foundation soil at the boundary of the mixing pile, and the interlayer is filled with cement soil 2 as a transition layer. The precast slabs and the foundation soil are completely different in material property, the contact relation between the soil and the structure is improved due to the existence of the cement soil transition layer, and the precast slabs, the cement soil around the slabs and the foundation soil can form a whole under the good bonding and curing action of the cement soil to jointly bear the upper load.
In the composite foundation structure, the continuous H-shaped stirring tank, the cement soil and the prefabricated plates inside form a waterproof continuous wall with extremely poor drainage capacity, so that the actual stirring tank influence area 4 is not only limited to the tank body, but also influences the inner area of the H-shaped structure due to the drainage blocking effect, namely the dotted area in figure 1. In the part of the stirring tank affected zone 4, water in the foundation soil is blocked by the continuous wall and cannot smoothly enter other peripheral areas, so that the foundation settlement is also limited. Therefore, when an upper structure is constructed on the composite foundation, all the components including foundation soil in the lower H-shaped area bear upper load as a whole.
In the actual construction process, the sizes of the stirring tank and the single prefabricated plate can be adjusted according to the design requirement, but the size of the prefabricated plate is ensured to be smaller than that of the H-shaped stirring tank as far as possible, so that the prefabricated plate can be smoothly sunk into the tank. In the embodiment, the diameter of the mixing pile is 60cm, and the distance between the central lines of the adjacent mixing piles is 50 cm. The dimensions of the H-shaped stirring tank were 960 cm. times.540 cm. The thickness of the prefabricated plate is 45 cm. The length of the prefabricated plate after continuous splicing is 930cm in the direction of a horizontal wing plate, and the length of a vertical web plate is 430 cm. The depth of the stirring pile can be set according to needs, and is generally 1-5 m.
The precast slabs are distributed in the mixing pile in a mirror symmetry mode as far as possible, namely the thicknesses of the cement soil filled at the two sides of the precast slabs are the same and symmetrical. The top of the precast slab extends out of the ground or is flush with the ground according to construction requirements, and the upper part of the precast slab can form a foundation for supporting a structure through a pouring bearing platform.
The composite foundation structure can be constructed by the following construction method, and the construction steps are as follows (the dimensions are shown in the figure, and the dimensions given in the figure are all suggested dimensions and can be adjusted according to actual engineering):
And 2, in the construction area range, spirally stirring the cement mortar in the soft soil foundation from top to bottom according to the point diagram shown in the figure 2 by using a machine such as a three-axis stirrer, continuously spraying the cement mortar into the foundation soil through a guniting head at the bottom of the auger stem while stirring until the cement mortar is drilled to a specified depth (usually 1-5m), lifting the auger stem to form a stirring pile 1, and filling cement soil 2 into the stirring pile. It should be noted that, because a three-axis stirring machine is adopted, one construction is equivalent to directly forming three mutually meshed and communicated stirring areas.
and 4, pressing a prefabricated plate 3 into each mixing pile before the cement soil is solidified, wherein the prefabricated plate penetrates through the cement soil in the pile body, and the bottom of the prefabricated plate is pressed into the bottom of the mixing pile. The precast slabs 3 of the adjacent mixing piles are continuously spliced to form an H shape with the same layout as the H-shaped mixing tank.
4) And curing until the cement soil is cured, and forming a stirring groove-forming insertion type combined prefabricated special-shaped section composite foundation as shown in figure 4, wherein the prefabricated plates, the cement soil around the plates and the foundation soil share the upper load. And because a cement soil transition layer exists between the precast slab and the foundation soil, the contact relation between the soil and the structure is improved, and the bearing capacity is greatly improved compared with that of a conventional circular tubular pile foundation under the condition of using cement mortar with the same volume. Meanwhile, the soil body in the influence area 4 of the stirring tank is in a semi-closed state, the drainage condition is extremely poor, the post-construction settlement is small, and the bearing performance can be well exerted. The combined action of the two causes the novel composite foundation to have larger bearing capacity and easier control of foundation top settlement when used in a weak land area.
The method has the advantages of simple and reliable principle, simple and convenient operation, wide applicable working conditions, small influence by field construction conditions, capability of improving the utilization rate of materials, great improvement of the bearing capacity of the method compared with the bearing capacity of a conventional foundation under the condition of using the same volume of concrete mortar, and good application prospect.
The above-mentioned embodiments are merely a preferred embodiment of the present invention, but it is not intended to limit the present invention. Various changes and modifications can be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, all the technical schemes obtained by adopting the mode of equivalent replacement or equivalent transformation fall within the protection scope of the utility model.
Claims (9)
1. A stirring grooving insertion type combined prefabricated special-shaped section composite foundation structure is characterized by comprising a plurality of stirring piles (1), wherein each stirring pile (1) is embedded into a foundation in a round pile shape; all the stirring piles (1) are arranged on the ground plane according to an H shape, and the adjacent stirring piles (1) are mutually meshed and connected to form an H-shaped stirring tank in a continuous wall form; a precast slab (3) is vertically inserted into each mixing pile (1), and the precast slabs (3) in all the mixing piles (1) are continuously spliced along the direction of the H-shaped mixing tank; in each mixing pile (1), cement soil (2) is filled between two sides of the precast slab (3) and foundation soil at the boundary of the mixing pile (1) to serve as a transition layer.
2. The prefabricated profiled-section composite foundation structure of the stirred-tank plug-in type combination as claimed in claim 1, wherein said prefabricated slab (3) is a precast concrete slab or a precast steel plate.
3. The prefabricated profiled-section composite foundation structure of stirring tank insertion type as claimed in claim 1, wherein the bottom of said prefabricated slab (3) is sunk into the bottom of the stirring pile.
4. The prefabricated profiled-section composite foundation structure of stirring tank-insertion type as claimed in claim 1, wherein the size of said H-shaped stirring tank is larger than that of said prefabricated slab (3).
5. The stirring-tank-forming plug-in type combined prefabricated special-shaped section composite foundation structure as claimed in claim 1, wherein the diameter of the stirring piles (1) is 60cm, and the distance between the central lines of the adjacent stirring piles (1) is 50 cm.
6. The prefabricated profiled composite foundation structure of claim 1 wherein said H-shaped stirred tank has dimensions of 960cm x 540 cm.
7. Prefabricated profiled-section composite foundation structure of the stirred tank plug-in type combination according to claim 1, characterized in that the thickness of said prefabricated slab (3) is 45 cm.
8. The stirring-tank-forming insertion-type combined prefabricated special-shaped section composite foundation structure as claimed in claim 1, wherein the depth of the stirring pile (1) is 1-5 m.
9. The prefabricated special-shaped section composite foundation structure with the insertion type combination of the stirring tank as claimed in claim 1, wherein the prefabricated plates (3) are symmetrically distributed in the stirring pile (1), and the thickness of the cement soil (2) filled at the two sides of the prefabricated plates (3) is the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920376488.6U CN210194604U (en) | 2019-03-22 | 2019-03-22 | Stirring grooving insertion type combined prefabricated special-shaped section composite foundation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920376488.6U CN210194604U (en) | 2019-03-22 | 2019-03-22 | Stirring grooving insertion type combined prefabricated special-shaped section composite foundation structure |
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| CN210194604U true CN210194604U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920376488.6U Withdrawn - After Issue CN210194604U (en) | 2019-03-22 | 2019-03-22 | Stirring grooving insertion type combined prefabricated special-shaped section composite foundation structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109898507A (en) * | 2019-03-22 | 2019-06-18 | 浙江大学 | It stirs grooving plug-in type and combines prefabricated profiled-cross-section composite base structure and construction method |
-
2019
- 2019-03-22 CN CN201920376488.6U patent/CN210194604U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109898507A (en) * | 2019-03-22 | 2019-06-18 | 浙江大学 | It stirs grooving plug-in type and combines prefabricated profiled-cross-section composite base structure and construction method |
| CN109898507B (en) * | 2019-03-22 | 2024-06-11 | 浙江大学 | Stirring grooving insertion type combined prefabricated special-shaped section composite foundation structure and construction method |
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