CN212129160U - Oblique-pulling foundation pit supporting structure for pile top - Google Patents
Oblique-pulling foundation pit supporting structure for pile top Download PDFInfo
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- CN212129160U CN212129160U CN202020495569.0U CN202020495569U CN212129160U CN 212129160 U CN212129160 U CN 212129160U CN 202020495569 U CN202020495569 U CN 202020495569U CN 212129160 U CN212129160 U CN 212129160U
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Abstract
The utility model discloses a pile bolck draws underground structure to one side relates to geotechnical engineering technical field, and its technical scheme main points are: the device comprises a plurality of support piles arranged in parallel along a foundation pit excavation line and a plurality of pull piles arranged perpendicular to the foundation pit excavation line, wherein the top ends of the support piles are provided with crown beams for connecting the support piles; the top end of each pull pile is provided with a connecting beam for connecting the pull piles; the connecting beam side wall is connected with an oblique-pulling connecting piece, and the end part of the oblique-pulling connecting piece, which is far away from the connecting beam, is connected with the crown beam side wall. The supporting structure is a spatial rigid frame structure which is composed of supporting piles, tension piles, crown beams, connecting beams and oblique-pulling connecting pieces, is suitable for foundation pit engineering with the excavation depth range of 8-12m, has large lateral rigidity, small horizontal displacement and reasonable stress, can effectively limit deformation of the supporting structure, is mature in construction technology, does not need to be provided with a supporting soil-retaining structure and too many places, is convenient to construct and is flexible to arrange.
Description
Technical Field
The utility model relates to a geotechnical engineering technical field, more specifically say, it relates to a pile bolck draws underground structure to one side.
Background
The foundation pit support is a measure for temporarily retaining, reinforcing, protecting and controlling underground water adopted by the foundation pit in order to protect the safety of the construction of an underground main structure and the surrounding environment of the foundation pit. Whether a supporting structure is adopted for foundation pit excavation or not, which supporting structure is adopted, is determined by comprehensive analysis and comparison of economy, technology and environment according to the surrounding environment of the foundation pit, the condition of an underground structure, the excavation depth of the foundation pit, the engineering geological and hydrogeological conditions, the construction season, the regional engineering experience and the like. The foundation pit supporting structure system generally comprises two parts, namely a soil retaining structure and a precipitation and water stopping system. The pile and wall type supporting structure usually adopts steel sheet piles, reinforced concrete sheet piles, column type cast-in-place piles, underground continuous walls and the like, can be designed to be cantilever type, inner support type or anchor pull type according to soil conditions and foundation pit scale, and the gravity type supporting structure mostly adopts cement soil mixing pile retaining walls, soil nailing walls and the like.
At present, a plurality of foundation pit supporting structures are adopted in the prior art, and the supporting structures in the prior art have various application ranges. However, in some fields, due to the limitation of the surrounding conditions of the foundation pit or the reason of the stratum, only pile support can be adopted, and anchor cables cannot be adopted, but if the depth of the foundation pit is deep, the pile support needs to be large in pile diameter, is not economical, and has large deformation.
Therefore, the utility model aims at providing a be applicable to special native area super dark, super large foundation ditch, economic, quick, energy-conserving, material-saving, safe supporting construction and construction method simultaneously to satisfy the urgent need of present market development.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pile top cable-stayed foundation pit supporting structure, which is a spatial rigid frame structure consisting of a supporting pile, a crown beam at the top end of the supporting pile, a pulling pile, a connecting beam at the top end of the pulling pile and cable-stayed connecting pieces, so that the supporting structure has larger lateral rigidity, small horizontal displacement and reasonable stress, and can effectively limit the deformation of the supporting structure; meanwhile, the construction technology of the supporting structure is mature, a supporting soil retaining structure is not needed, too many fields are not needed, the construction is convenient, the arrangement is flexible, and the foundation pit supporting structure is suitable for foundation pit engineering with the excavation depth range of 8-12 m.
The above technical purpose of the present invention can be achieved by the following technical solutions: a pile top cable-stayed foundation pit supporting structure comprises a plurality of supporting piles arranged in parallel along a foundation pit excavation line and a plurality of pull piles arranged perpendicular to the foundation pit excavation line, wherein the top ends of the supporting piles are provided with crown beams for connecting the supporting piles; the top end of each pull pile is provided with a connecting beam for connecting the pull piles; the connecting beam side wall is connected with an oblique-pulling connecting piece, and the end part of the oblique-pulling connecting piece, which is far away from the connecting beam, is connected with the crown beam side wall.
By adopting the technical scheme, when the foundation pit supporting structure is arranged, the supporting piles are arranged in parallel along the foundation pit excavation line, the pull piles are arranged perpendicular to the foundation pit excavation line, and then the top ends of the supporting piles are conveniently connected through the top beams arranged at the top ends of the supporting piles; the top ends of a plurality of pull piles are conveniently connected through the connecting beams arranged at the top ends of the pull piles; the connection between the connecting beam and the crown beam is facilitated through the inclined-pulling connecting piece; the pile top cable-stayed foundation pit supporting structure is a spatial rigid frame structure which is formed by a supporting pile, a crown beam at the top end of the supporting pile, a pull pile, a connecting beam at the top end of the pull pile and cable-stayed connecting pieces, so that the supporting structure has higher lateral rigidity, small horizontal displacement and reasonable stress, and can effectively limit the deformation of the supporting structure; meanwhile, the construction technology of the supporting structure is mature, a supporting soil retaining structure is not needed, too many fields are not needed, the construction is convenient, the arrangement is flexible, and the foundation pit supporting structure is suitable for foundation pit engineering with the excavation depth range of 8-12 m.
The utility model discloses further set up to: the drawing piles are arranged perpendicular to the side of the foundation pit, the number of the drawing piles is not less than 3, and the distance between the drawing piles and the drawing piles is 1.5-2 times of the distance between the supporting piles and the supporting piles.
Through adopting above-mentioned technical scheme, the stake perpendicular to foundation ditch limit is arranged, and the quantity of stake is no less than 3, and the interval between stake and the stake is 1.5 ~ 2 times of the interval between fender pile and the fender pile, is convenient for ensure several and draws the stake combination after, the lateral deformation of the portal structure of strideing more that forms is very little, and can provide better lateral tension.
The utility model discloses further set up to: the distance between each group of the tension piles is 20-30 m, and the distance between each group of the tension piles is 2-3 times of the width of each group of the tension piles.
By adopting the technical scheme, the distance between each group of the tension piles is 20-30 m, and the distance between each group of the tension piles is 2-3 times of the width of each tension pile, so that the lateral rigidity of each tension pile is convenient to ensure, the horizontal displacement of the foundation pit supporting structure is small, the stress is reasonable, and the deformation of the supporting structure can be effectively limited.
The utility model discloses further set up to: the end part of the connecting beam is vertically connected with the side wall of the crown beam.
By adopting the technical scheme, the end part of the connecting beam is vertically connected with the side wall of the crown beam, so that the crown beam and the connecting beam are connected into a whole to form an inverted T-shaped structure, and the stability is better.
The utility model discloses further set up to: the inclined pulling connecting piece is an anchor cable.
Through adopting above-mentioned technical scheme, through the anchor rope, be connected the tie beam with the hat beam, make and draw the stake and can provide horizontal pulling force to the campshed, make the foundation ditch more firm.
The utility model discloses further set up to: the inclined pull connecting piece is a reinforced concrete slab.
Through adopting above-mentioned technical scheme, through reinforced concrete board, be connected the tie beam with the hat beam, make the anchor pile can provide horizontal pulling force to the campshed, make the foundation ditch more firm.
To sum up, the utility model discloses following beneficial effect has: the foundation pit supporting structure adopts a supporting form of combining single-row piles with pull piles, the pull piles are perpendicular to the edge of a foundation pit, and a multi-span portal structure is formed by combining a plurality of pull piles, so that the supporting structure has very small lateral deformation and can provide better lateral tension; the crown beam and the connecting beam are connected into a whole to form an inverted T-shaped structure, so that the stability is good; the connecting beam is connected with the crown beam by adopting an anchor cable, or the connecting beam is connected with the crown beam through a reinforced concrete slab, so that the tension pile can provide horizontal tension for the row pile, and the foundation pit is more stable; meanwhile, the supporting structure only relates to pile and beam construction, and has the advantages of simple structure, single process, small construction difficulty, large operation space in a foundation pit, convenience for quick expansion construction and shortened construction period; the supporting structure is a spatial rigid frame structure formed by supporting piles, crown beams at the top ends of the supporting piles, pull piles, connecting beams at the top ends of the pull piles and cable-stayed connecting pieces, so that the supporting structure has high lateral rigidity, small horizontal displacement and reasonable stress, and can effectively limit the deformation of the supporting structure; meanwhile, the construction technology of the supporting structure is mature, a supporting soil retaining structure is not needed, too many fields are not needed, the construction is convenient, the arrangement is flexible, and the supporting structure is particularly suitable for foundation pit engineering with the excavation depth range of 8-12 m.
Drawings
Fig. 1 is a schematic structural view in embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional view of embodiment 1 of the present invention;
fig. 3 is a schematic structural view in embodiment 2 of the present invention;
fig. 4 is a schematic cross-sectional view of embodiment 2 of the present invention.
In the figure: 1. supporting piles; 2. pile pulling; 3. a crown beam; 4. a connecting beam; 5. an anchor cable; 6. a reinforced concrete slab.
Detailed Description
The present invention will be described in further detail with reference to the accompanying fig. 1-4.
Example 1: a cable-stayed foundation pit supporting structure for a pile top is shown in figures 1 and 2 and comprises a plurality of supporting piles 1 arranged in parallel along a foundation pit excavation line and a plurality of pull piles 2 arranged perpendicular to the foundation pit excavation line, wherein the top ends of the supporting piles 1 are fixedly provided with crown beams 3 connecting the supporting piles 1. The top end of the pull pile 2 is fixedly provided with a connecting beam 4 for connecting a plurality of pull piles 2. The side wall of the connecting beam 4 is connected with a diagonal connecting piece, and the end part of the diagonal connecting piece far away from the connecting beam 4 is connected with the side wall of the crown beam 3.
In this embodiment, when the arrangement of the foundation pit supporting structure is performed, a plurality of supporting piles 1 are arranged in parallel along the foundation pit excavation line, a plurality of tension piles 2 are arranged perpendicular to the foundation pit excavation line, and then the top ends of the plurality of supporting piles 1 are connected conveniently through the top beams 3 arranged at the top ends of the supporting piles 1. The connection of a plurality of pull piles 2 at the top end is facilitated by the tie beams 4 arranged at the top end of the pull piles 2. The connection between the connecting beam 4 and the crown beam 3 is convenient through the inclined pulling connecting piece. The pile top cable-stayed foundation pit supporting structure is a spatial rigid frame structure which is formed by the supporting pile 1, the top beam 3 at the top end of the supporting pile 1, the pull pile 2, the connecting beam 4 at the top end of the pull pile 2 and cable-stayed connecting pieces together, so that the supporting structure has large lateral rigidity, is small in horizontal displacement and reasonable in stress, and can effectively limit the deformation of the supporting structure. Meanwhile, the construction technology of the supporting structure is mature, a supporting soil retaining structure is not needed, too many fields are not needed, the construction is convenient, the arrangement is flexible, and the foundation pit supporting structure is suitable for foundation pit engineering with the excavation depth range of 8-12 m.
The tension piles 2 are arranged perpendicular to the side of the foundation pit, the number of the tension piles 2 is not less than 3, and the distance between each tension pile 2 and each tension pile 2 is 1.5-2 times the distance between each support pile 1 and each support pile 1.
In this embodiment, 2 perpendicular to foundation ditch limits of anchor pile are arranged, and 3 are no less than to the quantity of anchor pile 2, and the interval between anchor pile 2 and the anchor pile 2 is 1.5 ~ 2 times of the interval between anchor pile 1 and the anchor pile 1, is convenient for ensure several anchor piles 2 combination back, and the lateral deformation of the portal structure of strideing more that forms is very little, and can provide better lateral tension.
The distance between each group of the tension piles 2 is 20-30 m, and the distance between each group of the tension piles 2 and the corresponding tension pile 2 is 2-3 times the width of each group of the tension piles 2.
In this embodiment, the distance between each group of tension piles 2 is 20-30 m, and the distance between each group of tension piles 2 and each group of tension piles 2 is 2-3 times the width of each group of tension piles 2, so that the lateral rigidity of each group of tension piles 2 can be ensured, the foundation pit supporting structure is small in horizontal displacement and reasonable in stress, and the deformation of the supporting structure can be effectively limited.
The end part of the connecting beam 4 is vertically connected with the side wall of the crown beam 3.
In the embodiment, the end part of the connecting beam 4 is vertically connected with the side wall of the crown beam 3, so that the crown beam 3 and the connecting beam 4 are connected into a whole to form an inverted T-shaped structure, and the stability is better.
The inclined pulling connecting piece is an anchor cable 5 made of steel bars or steel strands.
In this embodiment, the tie beam 4 is connected to the crown beam 3 through the anchor cable 5 made of steel bars or steel strands, so that the tension piles 2 can provide horizontal tension to the row piles, and the foundation pit is more stable.
The construction steps of the stay-cable foundation pit supporting structure of the pile top in the embodiment are as follows:
1) and calculating and determining the length and diameter of the pile body (the support pile 1 and the pull pile 2) in the supporting structure and the reinforcement cage arrangement mode according to the excavation depth of the foundation pit, the physical performance index of the soil body and the technical standard.
2) And (3) drilling and piling, namely, calculating the length and the diameter of the determined pile body according to the step 1), and drilling at the corresponding position of the designed pile body arrangement to form a pile hole.
3) And manufacturing a reinforcement cage, and hoisting the manufactured reinforcement cage.
4) And pouring concrete into the pile hole in the step 2).
5) And excavating the crown beam 3 and the connecting beam 4, and manufacturing a reinforcing steel bar.
6) And holes of anchor cables 5 are reserved on the crown beam 3 and the connecting beam 4.
7) And pouring concrete for the crown beam 3 and the connecting beam 4.
8) And penetrating a steel strand into the hole of the anchor cable 5 reserved in the step 6), and connecting the connecting beam 4 with the crown beam 3 through the steel strand.
9) And tensioning the anchor cable 5.
Example 2: as shown in fig. 3 and 4, the difference from embodiment 1 is that: the inclined pull connecting piece is a reinforced concrete slab 6.
In this embodiment, the tie beam 4 is connected with the crown beam 3 through the reinforced concrete slab 6, so that the tension pile 2 can provide horizontal tension for the row piles, and the foundation pit is more stable.
The construction steps of the stay-cable foundation pit supporting structure of the pile top in the embodiment are as follows:
1) and calculating and determining the length and diameter of the pile body (the support pile 1 and the pull pile 2) of the supporting structure and the reinforcement mode of the reinforcement cage according to the excavation depth of the foundation pit amount, the physical performance index of the soil body and the technical standard.
2) And (3) drilling to form a pile, namely drilling at a corresponding position of the designed pile arrangement according to the length and the diameter of the pile determined in the step 1) to form a pile hole.
3) And manufacturing a reinforcement cage, and hoisting the manufactured reinforcement cage.
4) And pouring concrete into the pile hole in the step 2).
5) And excavating the crown beam 3 and the connecting beam 4, and leveling the ground between the crown beam 3 and the connecting beam 4.
6) And manufacturing the crown beam 3, the connecting beam 4 and the reinforcing steel bars between the crown beam 3 and the connecting beam 4.
7) And casting and manufacturing the crown beam 3, the connecting beam 4 and concrete between the crown beam 3 and the connecting beam 4, and connecting the connecting beam 4 and the crown beam 3 through a reinforced concrete plate 6 formed by casting the concrete between the crown beam 3 and the connecting beam 4.
The working principle is as follows: when the foundation pit supporting structure is arranged, a plurality of supporting piles 1 are arranged in parallel along a foundation pit excavation line, a plurality of pull piles 2 are arranged perpendicular to the foundation pit excavation line, and then the top ends of the supporting piles 1 are connected conveniently through crown beams 3 arranged at the top ends of the supporting piles 1. The connection of a plurality of pull piles 2 at the top end is facilitated by the tie beams 4 arranged at the top end of the pull piles 2. The connection between the connecting beam 4 and the crown beam 3 is convenient through the inclined pulling connecting piece. The pile top cable-stayed foundation pit supporting structure is a spatial rigid frame structure which is formed by the supporting pile 1, the top beam 3 at the top end of the supporting pile 1, the pull pile 2, the connecting beam 4 at the top end of the pull pile 2 and cable-stayed connecting pieces together, so that the supporting structure has large lateral rigidity, is small in horizontal displacement and reasonable in stress, and can effectively limit the deformation of the supporting structure. Meanwhile, the construction technology of the supporting structure is mature, a supporting soil retaining structure is not needed, too many fields are not needed, the construction is convenient, the arrangement is flexible, and the foundation pit supporting structure is suitable for foundation pit engineering with the excavation depth range of 8-12 m. This supporting construction of foundation ditch adopts the support form that single row of stake combines the stub 2, and the stub 2 perpendicular to foundation ditch limit forms many strides portal structure through several stub 2 combinations for supporting construction's lateral deformation is very little, can provide better lateral tension. The crown beam 3 and the connecting beam 4 are connected into a whole to form an inverted T-shaped structure, and the stability is good. The connecting beam 4 is connected with the crown beam 3 through the anchor cable 5, or the connecting beam 4 is connected with the crown beam 3 through the reinforced concrete slab 6, so that the anchor piles 2 can provide horizontal tension for the row piles, and the foundation pit is more stable. Meanwhile, the supporting structure only relates to pile and beam construction, and is simple in structure, single in process, small in construction difficulty, large in operation space in a foundation pit, convenient to rapidly expand and construct and capable of shortening the construction period.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a pile bolck draws underground structure to one side, characterized by: the foundation pit supporting structure comprises a plurality of supporting piles (1) arranged in parallel along a foundation pit excavation line and a plurality of pull piles (2) arranged perpendicular to the foundation pit excavation line, wherein top ends of the supporting piles (1) are provided with crown beams (3) for connecting the supporting piles (1); the top end of each pull pile (2) is provided with a connecting beam (4) for connecting the pull piles (2); the side wall of the connecting beam (4) is connected with an oblique-pulling connecting piece, and the end part of the oblique-pulling connecting piece far away from the connecting beam (4) is connected with the side wall of the crown beam (3).
2. The pile top cable-stayed foundation pit supporting structure as claimed in claim 1, wherein: draw stake (2) perpendicular to foundation ditch limit to arrange, the quantity of drawing stake (2) is no less than 3, draw stake (2) and draw the interval between stake (2) for prop up 1.5 ~ 2 times of the interval between stake (1) and prop up stake (1).
3. The pile top cable-stayed foundation pit supporting structure as claimed in claim 1, wherein: the distance between each group of the pull piles (2) is 20-30 m, and the distance between each group of the pull piles (2) and the corresponding pull pile (2) is 2-3 times of the width of each group of the pull piles (2).
4. The pile top cable-stayed foundation pit supporting structure as claimed in claim 1, wherein: the end part of the connecting beam (4) is vertically connected with the side wall of the crown beam (3).
5. The pile top cable-stayed foundation pit supporting structure as claimed in claim 1, wherein: the inclined pulling connecting piece is an anchor cable (5).
6. The pile top cable-stayed foundation pit supporting structure as claimed in claim 1, wherein: the inclined pull connecting piece is a reinforced concrete slab (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020495569.0U CN212129160U (en) | 2020-04-08 | 2020-04-08 | Oblique-pulling foundation pit supporting structure for pile top |
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| CN202020495569.0U CN212129160U (en) | 2020-04-08 | 2020-04-08 | Oblique-pulling foundation pit supporting structure for pile top |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136873A (en) * | 2021-04-16 | 2021-07-20 | 南通大学 | Out-pit diagonal-pulling type supporting structure system and construction method thereof |
| CN113529744A (en) * | 2021-08-24 | 2021-10-22 | 南通大学 | Large-span truss-like bearing structure outside pit of excavation supporting |
-
2020
- 2020-04-08 CN CN202020495569.0U patent/CN212129160U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136873A (en) * | 2021-04-16 | 2021-07-20 | 南通大学 | Out-pit diagonal-pulling type supporting structure system and construction method thereof |
| CN113529744A (en) * | 2021-08-24 | 2021-10-22 | 南通大学 | Large-span truss-like bearing structure outside pit of excavation supporting |
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