CN113585277A - Complicated-terrain foundation pit supporting and connecting structure and construction method thereof - Google Patents
Complicated-terrain foundation pit supporting and connecting structure and construction method thereof Download PDFInfo
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- CN113585277A CN113585277A CN202110775105.4A CN202110775105A CN113585277A CN 113585277 A CN113585277 A CN 113585277A CN 202110775105 A CN202110775105 A CN 202110775105A CN 113585277 A CN113585277 A CN 113585277A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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Abstract
The utility model relates to a complicated topography excavation supporting connection structure belongs to excavation supporting's technical field, it includes that a plurality of first digging piles and a plurality of second of digging soon around the foundation ditch dig the stake, a plurality of first digging piles around foundation ditch a week soon, a plurality of second dig the stake soon and also around foundation ditch a week, the second dig the stake soon and be located the first digging a inboard soon, the first is dug soon and is fixed with first guan liang on the stake, first guanliang is dug a plurality of first digging piles soon and is connected, be fixed with second guanliang on the second digging pile, second guanliang is dug a plurality of second and is dug the stake and connect. The foundation pit safety protection device has the effects of improving the stability of the foundation pit and guaranteeing the safety of buildings around the foundation pit.
Description
Technical Field
The application relates to the technical field of foundation pit support, in particular to a complex-terrain foundation pit support connecting structure and a construction method thereof.
Background
The foundation pit support is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.
At present, most of foundation pit supports adopt row pile supports, support piles are uniformly distributed around a foundation pit, reinforcing mesh sheets are arranged on the outer surfaces of the support piles to prevent soil between the support piles from collapsing into the pit, concrete is sprayed on the reinforcing mesh sheets, the top ends of the support piles are connected with crown beams, and the crown beams connect the support piles.
In view of the above-mentioned related art, the inventors consider that there is a defect that when the environment around the foundation pit is complicated, the stability of the foundation pit is lowered, and the safety of the building around the foundation pit is lowered.
Disclosure of Invention
In order to improve the stability of a foundation pit and ensure the safety of buildings around the foundation pit, the application provides a complex-terrain foundation pit supporting and connecting structure and a construction method thereof.
In a first aspect, the application provides a complicated topography underground structure adopts following technical scheme:
the utility model provides a complicated topography excavation supporting connection structure, dig the stake and dig the stake including being located a plurality of first digging soon and a plurality of second around the foundation ditch, a plurality of first digging soon the stake around foundation ditch a week, a plurality of second dig the stake also around foundation ditch a week soon, the second dig the stake soon and be located the first digging a stake inboard soon, the first digging soon is fixed with first guan liang, first guanliang is with a plurality of first digging a connection soon, the second is dig the stake soon and is fixed with second guanliang, second guanliang is with a plurality of second digging a connection soon.
Through adopting above-mentioned technical scheme, the peripheral fixed equipartition of foundation ditch has a plurality of first piles of digging soon, and first guan liang is with a plurality of first piles of digging soon to be connected, and the first inboard of digging the pile soon is provided with the second and digs the pile soon, and the second guanliang is with a plurality of second dig a pile soon fixedly, when the environment of foundation ditch is complicated, dig the pile through first digging soon and dig the second and dig the pile fix all around the foundation ditch, has improved the stability of foundation ditch, guarantees the peripheral building safety of foundation ditch.
Optionally, the first rotary excavating pile corresponds to a second rotary excavating pile, the height of the first rotary excavating pile is higher than that of the second rotary excavating pile, a first embedded steel plate is fixed on one side, close to the second rotary excavating pile, of the first crown beam, a second embedded steel plate is fixed on the top surface of the second crown beam, and a pile top supporting beam which is obliquely arranged is fixed between the first embedded steel plate and the second embedded steel plate.
By adopting the technical scheme, the first pre-buried steel plate is fixed on the first crown beam, the second pre-buried steel plate is fixed on the second crown beam, the pile top supporting beam is fixed between the first pre-buried steel plate and the second pre-buried steel plate, the stability of the first crown beam and the stability of the second crown beam are improved, and therefore the stability of the first rotary excavating pile and the stability of the second rotary excavating pile are improved.
Optionally, a connecting beam is arranged on one side of the second crown beam facing the first rotary excavating pile, and the connecting beam fixes between the first rotary excavating pile and the second crown beam.
By adopting the technical scheme, the connecting beam is fixed between the first rotary excavating pile and the second crown beam, the stability between the second crown beam and the first rotary excavating pile is improved, the connecting beam, the first rotary excavating pile and the pile top supporting beam form a triangle, the stability is improved, and therefore the stability of the whole foundation pit is improved.
Optionally, a plurality of first reinforcing steel bars are fixed on one side of the first embedded steel plate close to the first crown beam, and the plurality of first reinforcing steel bars are poured in the first crown beam; and a plurality of second reinforcing steel bars are also fixed on one side of the second embedded reinforcing steel bars close to the second crown beam, and are poured in the second crown beam.
Through adopting above-mentioned technical scheme, through pouring first reinforcing bar in first hat roof beam, the second reinforcing bar is poured in second hat roof beam, and the convenience is to the installation of first embedded steel bar and the pre-buried steel sheet of second.
Optionally, a third steel bar is fixed to one side, close to the first rotary excavating pile, of the first embedded steel bar, the third steel bar is located below the first steel bar, and one end, far away from the first embedded steel plate, of the third steel bar is fixed to the first rotary excavating pile.
Through adopting above-mentioned technical scheme, the third reinforcing bar is fixed between first dig the stake soon and first pre-buried steel sheet, has increased the stability of first pre-buried steel sheet to make a pile bolck supporting beam's stability increase.
Optionally, a plain concrete pile is fixed between every two second rotary excavation piles, and an occlusion part exists between the plain concrete pile and the adjacent second rotary excavation pile.
Through adopting above-mentioned technical scheme, be fixed with plain concrete pile between two adjacent second rotary excavating piles, plain concrete pile has increased the second and has dug the intensity of stake soon, makes whole foundation ditch more stable.
Optionally, the width of the first crown beam is greater than the diameter of the first rotary excavating pile, a reinforcing mesh is arranged on one side, close to the second rotary excavating pile, of the first rotary excavating pile, and the reinforcing mesh is fixed between the first crown beam and the connecting beam.
Through adopting above-mentioned technical scheme, be fixed with the reinforcing bar net between first crown beam and the tie-beam, the reinforcing bar net can reduce the soil in the reinforcing bar net outside and drop into the inside possibility of foundation ditch.
In a second aspect, the construction method for the complex terrain foundation pit supporting structure provided by the application adopts the following technical scheme: s1, drilling holes through a rotary digging machine around the foundation pit, uniformly forming pile holes of first rotary digging piles at the periphery of the foundation pit, wherein the distance between each first rotary digging pile is 1.5 m;
s2, placing a reinforcement cage in the first rotary pile hole, and pouring a first rotary pile;
s3, pouring a first crown beam, putting three rows of first steel bars welded on the first embedded steel plate into the first crown beam, and pouring the first steel bars into the first crown beam; implanting a lower row of third steel bars into the first rotary excavating pile in a steel bar implanting construction mode;
s4, digging a plain concrete pile on the inner side of the first rotary digging pile, and pouring the plain concrete pile;
s5, digging a pile hole of the second rotary digging pile, and digging off an occluded part of the plain concrete pile and the second rotary digging pile when digging the hole;
s6, pouring the second rotary excavating pile, pouring the second crown beam and the connecting beam while pouring the second rotary excavating pile, inserting the second steel bars on the second embedded steel plates into the steel bar cage of the second crown beam, and pouring the second steel bars of the second embedded steel plates into the second crown beam;
s7, fixing the connecting beam between the first embedded steel plate and the second embedded steel plate;
and S8, finally, installing a reinforcing mesh, and fixing the reinforcing mesh between the first crown beam and the connecting beam.
By adopting the technical scheme: the connection structure of the foundation pit is firm and reliable in connection, simple in structure and easy to construct, the foundation pit supporting connection structure is stable, and the safety of surrounding buildings is guaranteed.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the connection structure of the foundation pit is firm and reliable in connection, simple in structure and easy to construct, and the supporting and connecting structure of the foundation pit is stable, so that the safety of surrounding buildings is guaranteed;
2. the connecting beam, the first rotary excavating pile and the pile top supporting beam form a triangle, so that the stability is increased, and the stability of the whole foundation pit is increased;
3. and a plain concrete pile is fixed between every two adjacent second rotary excavating piles, and the strength of the second rotary excavating piles is increased by the plain concrete pile, so that the whole foundation pit is more stable.
Drawings
Fig. 1 is a schematic structural diagram of the present application.
Fig. 2 is a schematic representation of a first rebar and a second rebar embodying the present application.
Fig. 3 is a schematic view of a first pre-buried steel plate, a pile top support beam and a second pre-buried steel plate according to the present application.
Fig. 4 is a schematic view of a plain concrete pile embodying the present application.
Description of reference numerals: 1. a first rotary digging pile; 2. a second rotary digging pile; 3. the first crown beam 31 and the first embedded steel plate; 311. a first reinforcing bar; 312. a third reinforcing bar; 4. a second crown beam; 41. a second pre-buried steel plate; 411. a second reinforcing bar; 5. a pile top support beam; 6. a connecting beam; 7. plain concrete piles; 8. and (4) reinforcing mesh.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses complicated topography underground structure, refer to fig. 1, connection structure includes that the first pile 1 and the second of digging soon digs a stake 2 soon, and a plurality of first digging soon stake 1 evenly distributed around the foundation ditch, the first top of digging a stake 1 soon is fixed with first guan liang, and first guanliang 3 is with a plurality of first digging a stake 1 soon fixed. The diameter of the first rotary digging pile 1 is phi 1000mm, the pile length is 20000mm, and the distance between the two first rotary digging piles 1 is 1500 mm.
The second rotary excavating pile 2 is located on the inner side of the second rotary excavating pile 2, the second rotary excavating piles 2 are evenly distributed in the foundation pit, the second rotary excavating piles 2 correspond to the first rotary excavating piles 1 one by one, a second crown beam 4 is fixed on the second rotary excavating pile 2, and the second crown beams 4 are connected together. The diameter of the second rotary digging pile 2 is phi 1000mm, the pile length is 16400mm, and the distance between the two second rotary digging piles 2 is 1500 mm. The distance between the corresponding first rotary digging pile 1 and the second rotary digging pile 2 is 2000 mm.
Referring to fig. 1 and 2, a first embedded steel plate 31 is fixed on one side of the first crown beam 3 close to the second rotary excavating pile 2, the size of the first embedded steel plate 31 is 1800 × 800mm, and the thickness of the first embedded steel plate 31 is 20 mm. And a second embedded steel plate 41 is fixed on the top surface of the second crown beam 4, the size of the second embedded steel plate 41 is 1000mm by 800mm, and the thickness of the second embedded steel plate is 20 mm. A pile top supporting beam 5 is fixed between the first embedded steel plate 31 and the second embedded steel plate 41, and the diameter of the supporting beam is phi 620 mm. The first crown beam 3 and the second crown beam 4 are fixed through the pile top support beam 5, so that the corresponding first rotary excavating pile 1 and the corresponding second rotary excavating pile 2 are fixed.
And a connecting beam 6 is fixed on the side surface of the second crown beam 4 close to the corresponding first rotary excavating pile 1, and the size of the connecting beam 6 is 1000 x 1000 mm. And one side of the connecting beam 6, which is far away from the second crown beam 4, is fixed with the first rotary excavating pile 1. The connecting beam 6 is formed by casting simultaneously with the second crown beam 4 when casting the second crown beam 4. The connecting beam 6 increases the connecting strength between the first rotary digging pile 1 and the second rotary digging pile 2, so that the whole structure of the foundation pit is more stable. The first rotary digging pile 1, the connecting beam 6 and the pile top supporting beam 5 form a triangle structure, and the triangle has stability, so that the whole structure is firm and stable.
Referring to fig. 2 and 3, three rows of first reinforcing steel bars 311 are fixed on one side of the first embedded steel plate 31 away from the pile top supporting beam 5, the three rows of first reinforcing steel bars 311 are fixed with the first embedded steel plate 31 through welding, and the welding mode is through-hole plug welding. Three rows of first reinforcing steel bars 311 are arranged, and the three rows of first reinforcing steel bars 311 are all 600mm long C22 reinforcing steel bars. Three rows of first reinforcing bars 311 are cast in the first crown beam 3. A row of third steel bars 312 is arranged below the first steel bars 311, and the third steel bars 312 are implanted into the first rotary excavating pile 1 in a steel bar planting construction mode, so that the stability of the first embedded steel plate 31 is improved.
One side of the second embedded steel plate 41 close to the top surface of the second rotary excavating pile 2 is welded with three rows of 600 long C22 second steel bars 411 in a perforation plug welding mode. A row of the second reinforcing bars 411 is provided in three, and when the second crown beam 4 is cast, the second reinforcing bars 411 are cast in the second crown beam 4.
Referring to fig. 4, a plain concrete pile 7 is arranged between every two second rotary excavation piles 2, and an occlusion part exists between the plain concrete pile 7 and each of the two second rotary excavation piles 2, and the length of the occlusion part is 250 mm. The height of the plain concrete piles 7 is the same as that of the second rotary digging pile 2, the height of the plain concrete piles is 16400mm, the diameter of the plain concrete piles is phi 1000mm, and the distance between the two plain concrete piles 7 is 1500 mm. The two second rotary excavating piles 2 are connected through the plain concrete piles 7, and the strength between the second rotary excavating piles 2 is increased. When the second rotary excavating pile 2 is poured, the plain concrete pile 7 is poured firstly, then the pile hole of the second rotary excavating pile 2 is dug, the occluded part of the plain concrete pile 7 and the second rotary excavating pile 2 is dug out, and finally the second rotary excavating pile 2 is poured.
Referring to fig. 2, a reinforcing mesh 8 is fixed on one side of each first crown beam 3 close to the first rotary drilled pile 1, the bottom ends of the reinforcing meshes 8 are fixed on the top surface of each connecting beam 6, one reinforcing mesh 8 is arranged between every two first crown beams 3, the reinforcing mesh 8 can prevent soil outside the first rotary drilled pile 1 from entering a foundation pit, and concrete is sprayed on one side of each reinforcing mesh 8 far away from the first rotary drilled pile 1.
The embodiment of the application also discloses a construction method of the complex terrain foundation pit supporting and connecting structure, which comprises the following steps,
s1, drilling holes through a rotary digging machine around the foundation pit, uniformly forming pile holes of first rotary digging piles 1 on the periphery of the foundation pit, wherein the distance between each first rotary digging pile 1 is 1.5 m;
s2, placing a reinforcement cage in the hole of the first rotary drilled pile 1, and pouring the first rotary drilled pile 1;
s3, pouring the first crown beam 3, placing the three rows of first steel bars 311 welded to the first embedded steel plate 31 into the first crown beam 3, and pouring the first steel bars 311 into the first crown beam 3; the lower row of third steel bars 312 are implanted into the first rotary excavating pile 1 in a steel bar implanting construction mode;
s4, digging a plain concrete pile 7 on the inner side of the first rotary digging pile 1, and pouring the plain concrete pile 7;
s5, digging a pile hole of the second rotary digging pile 2, and digging an occluded part of the plain concrete pile 7 and the second rotary digging pile 2 when digging the hole;
s6, pouring the second rotary pile 2, pouring the second crown beam 4 and the connecting beam 6 while pouring the second rotary pile 2, inserting the second steel bars 411 on the second embedded steel plates 41 into the steel bar cage of the second crown beam 4 to pour the second steel bars 411 of the second embedded steel plates 41 into the second crown beam 4;
s7, fixing the connecting beam 6 between the first embedded steel plate 31 and the second embedded steel plate 41;
s8, finally, installing the reinforcing mesh 8, and fixing the reinforcing mesh 8 between the first crown beam 3 and the connecting beam 6.
This application firm in connection is reliable, simple structure, and easy construction is applicable to foundation ditch all ring edge border and is complicated, has improved the stability of foundation ditch, has guaranteed foundation ditch peripheral building safety.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a complicated topography excavation supporting connection structure which characterized in that: the pile (2) are dug including a plurality of first dug piles (1) and a plurality of second of digging soon around the foundation ditch, a plurality of first dig piles (1) of digging soon around foundation ditch a week, a plurality of second dig piles (2) also around foundation ditch a week soon, the second dig pile (2) soon and be located first dig pile (1) inboard, first dig pile (1) soon and be fixed with first guan liang (3), first guanliang (3) are dug a plurality of first digging piles (1) and are connected, the second is dug and is fixed with second guanliang (4) on the pile (2), second guanliang (4) are dug a plurality of second and are dug pile (2) and are connected.
2. The complex terrain foundation pit supporting and connecting structure of claim 1, wherein: the pile (2) is dug soon to first second that corresponds of digging soon to stake (1), and the height that the stake (2) was dug soon to first height of digging soon (1) is higher than the second height of digging soon, and one side that first crown beam (3) are close to the second and dig stake (2) is fixed with first pre-buried steel sheet (31), is fixed with pre-buried steel sheet of second (41) on the top surface of second crown beam (4), is fixed with the stake top of a river supporting beam (5) that the slope set up between first pre-buried steel sheet (31) and the pre-buried steel sheet of second (41).
3. The complex-terrain foundation pit supporting and connecting structure as claimed in claim 2, wherein: and a connecting beam (6) is arranged on one side, facing the first rotary excavating pile (1), of the second crown beam (4), and the connecting beam (6) is fixed between the first rotary excavating pile (1) and the second crown beam (4).
4. The complex-terrain foundation pit supporting and connecting structure as claimed in claim 2, wherein: a plurality of first reinforcing steel bars (311) are fixed on one side, close to the first crown beam (3), of the first embedded steel plate (31), and the plurality of first reinforcing steel bars (311) are poured in the first crown beam (3); one side of the second embedded steel bars, which is close to the second crown beam (4), is also fixed with a plurality of second steel bars (411), and the plurality of second steel bars (411) are poured in the second crown beam (4).
5. The complex-terrain foundation pit supporting and connecting structure as claimed in claim 4, wherein: and a third steel bar (312) is fixed on one side of the first embedded steel bar close to the first rotary excavating pile (1), the third steel bar (312) is positioned below the first steel bar (311), and one end, far away from the first embedded steel plate (31), of the third steel bar (312) is fixed with the first rotary excavating pile (1).
6. A complex-terrain excavation supporting and connecting structure as claimed in any one of claims 1 to 5, wherein: plain concrete piles (7) are fixed between every two second rotary digging piles (2), and an occlusion part exists between each plain concrete pile (7) and the adjacent second rotary digging pile (2).
7. The complex-terrain foundation pit supporting and connecting structure as claimed in claim 6, wherein: the width of the first crown beam (3) is larger than the diameter of the first rotary digging pile (1), a reinforcing mesh (8) is arranged on one side, close to the second rotary digging pile (2), of the first rotary digging pile (1), and the reinforcing mesh (8) is fixed between the first crown beam (3) and the connecting beam (6).
8. A construction method of a complex terrain foundation pit supporting structure is characterized by comprising the following steps: the method comprises the following steps:
s1, drilling holes through a rotary digging machine around the foundation pit, uniformly forming pile holes of first rotary digging piles (1) on the periphery of the foundation pit, wherein the distance between each first rotary digging pile (1) is 1.5 m;
s2, placing a reinforcement cage in the hole of the first rotary digging pile (1), and pouring the first rotary digging pile (1);
s3, pouring the first crown beam (3), placing three rows of first reinforcing steel bars (311) welded to the first embedded steel plate (31) into the first crown beam (3), and pouring the first reinforcing steel bars (311) into the first crown beam (3); a lower row of third steel bars (312) are implanted into the first rotary digging pile (1) in a steel bar implanting construction mode;
s4, digging a plain concrete pile (7) on the inner side of the first rotary digging pile (1), and pouring the plain concrete pile (7);
s5, digging a pile hole of the second rotary digging pile (2), and digging an occlusion part of the plain concrete pile (7) and the second rotary digging pile (2) when digging the hole;
s6, pouring the second rotary excavating pile (2), pouring the second crown beam (4) and the connecting beam (6) while pouring the second rotary excavating pile (2), inserting the second steel bars (411) on the second embedded steel plates (41) into the steel bar cage of the second crown beam (4) to pour the second steel bars (411) of the second embedded steel plates (41) into the second crown beam (4) during pouring;
s7, fixing the connecting beam (6) between the first embedded steel plate (31) and the second embedded steel plate (41);
s8, finally, installing the reinforcing mesh (8), and fixing the reinforcing mesh (8) between the first crown beam (3) and the connecting beam (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110775105.4A CN113585277A (en) | 2021-07-08 | 2021-07-08 | Complicated-terrain foundation pit supporting and connecting structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110775105.4A CN113585277A (en) | 2021-07-08 | 2021-07-08 | Complicated-terrain foundation pit supporting and connecting structure and construction method thereof |
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| CN113585277A true CN113585277A (en) | 2021-11-02 |
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| CN210140832U (en) * | 2019-05-20 | 2020-03-13 | 上海建工集团股份有限公司 | Prestressed occlusion type double-row pile foundation pit supporting structure |
| CN111395354A (en) * | 2020-03-20 | 2020-07-10 | 中国建筑西南勘察设计研究院有限公司 | Multi-stage large-row-spacing pile combined supporting structure and foundation pit excavation method thereof |
| CN112942377A (en) * | 2021-03-22 | 2021-06-11 | 深圳市工勘岩土集团有限公司 | Novel support shear-resistant structure and construction method thereof |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110142550A1 (en) * | 2008-08-14 | 2011-06-16 | Jae Ho Lee | Method for constructing a chair-type, self-supported earth retaining wall |
| CN103758134A (en) * | 2014-01-24 | 2014-04-30 | 中国建筑股份有限公司 | Combined double-row pile supporting system and construction method thereof |
| CN204023578U (en) * | 2014-08-21 | 2014-12-17 | 云南工程建设总承包公司 | Retaining Structure with Double-row Piles |
| CN107299635A (en) * | 2016-04-15 | 2017-10-27 | 中天建设集团有限公司 | A kind of soft soil foundation slope collapse support reinforcement method |
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| CN210140832U (en) * | 2019-05-20 | 2020-03-13 | 上海建工集团股份有限公司 | Prestressed occlusion type double-row pile foundation pit supporting structure |
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Application publication date: 20211102 |