CN210216441U - Deep foundation pit supporting structure for cast-in-situ bored pile - Google Patents
Deep foundation pit supporting structure for cast-in-situ bored pile Download PDFInfo
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- CN210216441U CN210216441U CN201920182900.0U CN201920182900U CN210216441U CN 210216441 U CN210216441 U CN 210216441U CN 201920182900 U CN201920182900 U CN 201920182900U CN 210216441 U CN210216441 U CN 210216441U
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 14
- 238000011065 in-situ storage Methods 0.000 title claims description 12
- 239000004568 cement Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 12
- 230000010354 integration Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 description 15
- 230000037431 insertion Effects 0.000 description 15
- 238000005553 drilling Methods 0.000 description 12
- 239000002689 soil Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 210000002219 extraembryonic membrane Anatomy 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model discloses a reduce time limit for a project, easy to assemble and strut better bored concrete pile deep basal pit supporting construction of effect, its technical scheme main points are: including bored concrete pile, cement mixing pile, concrete pile, crossbeam and foundation ditch bottom plate, the foundation ditch bottom plate outside is equipped with a plurality of bored concrete pile, a plurality of bored concrete pile transversely sets up with vertical correspondence, the bored concrete pile outer end encloses and is equipped with round cement mixing pile, every two opposite bored concrete piles all connect the crossbeam in a plurality of bored concrete pile, the both sides of crossbeam all are equipped with connecting device, a plurality of crossbeam integration sets up, be equipped with on the bored concrete pile and be used for connecting device male inserted hole, the junction of a plurality of concrete pile connection between the crossbeam, the concrete pile is installed on the foundation ditch bottom plate.
Description
Technical Field
The invention relates to the field of deep foundation pit supporting, in particular to a cast-in-situ bored pile deep foundation pit supporting structure.
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.
The foundation pit belongs to temporary engineering and has the function of providing a space, so that the building operation of the foundation can be carried out according to the position designated by the design, in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit, the side wall and the surrounding environment of the foundation pit usually need to adopt a retaining and reinforcing foundation pit supporting measure, but at present, the foundation pit is constructed after the foundation pit is finished, the construction period of constructing the foundation pit and then constructing the basement is too long, and resources are wasted.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a cast-in-situ bored pile deep foundation pit supporting structure which is short in construction period, convenient to install and good in supporting effect.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a bored concrete pile deep basal pit supporting construction, includes bored concrete pile, cement mixing pile, concrete pile, crossbeam and foundation ditch bottom plate, the foundation ditch bottom plate outside is equipped with a plurality of bored concrete pile, a plurality of bored concrete pile transversely sets up with vertical correspondence, the bored concrete pile outer end is enclosed and is equipped with round cement mixing pile, every two opposite bored concrete piles all connect the crossbeam in a plurality of bored concrete pile, the both sides of crossbeam all are equipped with connecting device, a plurality of crossbeam integration sets up, be equipped with on the bored concrete pile and be used for connecting device male inserted hole, the junction of a plurality of concrete pile connection between the crossbeam, the concrete pile is installed on the foundation ditch bottom plate.
Further, connecting device is a plurality of connecting rod, the connecting rod includes cavity flexible head, cavity dead lever, spring and shell, cavity flexible head, cavity dead lever and spring all are located the shell, cavity flexible head bottom is equipped with the flexible mouth, be equipped with the spring between cavity dead lever and the shell, the cavity flexible head is being corresponded to the spring top, and cavity flexible head downstream extrusion spring upwards resets when releasing cavity flexible head, cavity dead lever top is equipped with the top, the top passes the flexible mouth and is located cavity flexible head, and the top diameter is greater than the flexible mouth diameter, the dead lever is fixed with the shell, the shell is fixed on the crossbeam.
Further, the shell bottom is equipped with into notes mouth, it communicates with each other with cavity dead lever is inside to advance the notes mouth, be equipped with a plurality of through-hole and first fixed orifices on the cavity dead lever lateral wall, cavity flexible overhead second fixed orifices and a plurality of export that match with first fixed orifices that are equipped with, cavity flexible head passes first fixed orifices and second fixed orifices through the inserted bar and fixes, the top is equipped with the opening.
A construction method for a cast-in-situ bored pile deep foundation pit support comprises the following steps:
(1) and (3) constructing a waterproof curtain and a cast-in-situ bored pile: according to the foundation pit excavation sideline, the cement mixing pile of outer lane is beaten down at foundation pit sideline outer end and is come to consolidate envelope's foundation pit side soil body, reserve the position of drilling bored concrete pile between cement mixing pile and the foundation pit sideline, squeeze into a plurality of drilling bored concrete piles and reserve the position between cement mixing pile and the basic sideline hole again, a plurality of drilling bored concrete piles horizontal all vertical one-to-one sets up and encloses into the inner circle, form the inserted hole through setting up the brick fetal membrane on the drilling bored concrete pile.
(2) Excavation of a foundation pit and pouring of a foundation pit bottom plate: adopting a central island type slope-raising according to proportion to excavate soil in the foundation pit, installing a foundation pit bottom plate frame at the bottom of the foundation pit after the foundation pit is excavated, installing a concrete pile frame on the foundation pit bottom plate frame, and pouring concrete after the installation is finished.
(3) Assembling the beam: after the foundation pit bottom plate and the concrete pile frame are poured, the cross beam is hoisted to the position of an insertion opening of a drilling pouring brick, the position is adjusted to enable each hollow telescopic head in the cross beam connecting device to be aligned to the corresponding insertion opening, the insertion rod is pulled out, the hollow telescopic heads are reset forwards through the acting force of the spring and inserted into the insertion opening of the drilling pouring pile, and the cross beam is poured after all the hollow telescopic heads are inserted into the insertion opening.
Further, in the step (1), the cast-in-situ bored pile needs to carry out high-pressure grouting on a high-pressure rotary jet pile hole when the strength of surrounding concrete reaches 75%, a test tube is firstly used before grouting to ensure that the material, variety and proportion of grout and various parameters of mechanical operation meet the design and parameter requirements, when the pressure of a nozzle reaches the design requirement, jet grouting is started, and after the jet grouting parameters reach the specified values, the jet tube is lifted according to the technological requirements of high-pressure rotary jet grouting to jet grouting from bottom to top.
Further, in the step (3), the beam pouring direction is sequentially progressed from one end of the beam to the other end of the beam. When approaching the other end, throw the material to opposite direction from one end instead, can avoid the concrete to produce incompact phenomena such as honeycomb, upper concrete must be in the closely knit back of lower floor concrete vibration can pour to guarantee that the concrete has good compactedness.
The invention has the beneficial effects that:
1. adopt the crossbeam to connect between a plurality of drilling bored concrete pile, and a plurality of crossbeams integration sets up, can play reinforced (rfd) effect, can regard as the crossbeam of basement again, shorten construction period.
2. Adopt connecting device between crossbeam and the bored concrete pile, the constructor can insert connecting device's flexible head in the inserted hole that the bored concrete pile reserved through taking off the inserted bar, and the back is consolidated after pouring.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of the structure of the connecting device of the present invention;
fig. 4 is a reference view showing the use of the connecting device of the present invention.
Reference numerals: 1. mixing the cement soil with the pile; 2. drilling a cast-in-place pile; 20. an insertion opening; 3. a cross beam; 30. a connecting device; 300. a hollow telescopic head; 3000. a second fixing hole; 3001. an outlet; 3002. a flexible opening; 301. a hollow fixing rod; 3010. an opening; 3011. ejecting the head; 3012. a first fixing hole; 3013. a through hole; 3014. an inlet for injecting; 302. a spring; 303. a housing; 304. inserting a rod; 4. a foundation pit bottom plate; 5. and (5) concrete piles.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1 to 4, the working principle of the present embodiment is as follows: the cement mixing pile 1 is arranged on the periphery to play the water stopping effect, the bored concrete pile 2 of the inner ring can be used for bearing piles of buildings, the foundation pit bottom plate 4 can ensure that the foundation pit can not collapse due to construction after being dug, the concrete pile 5 is fixed on the foundation pit bottom plate 4 and used for supporting the cross beam 3, the cross beam 3 is more convenient to pour and reinforce in the insertion hole 20 for enabling the telescopic head of the connecting device 30 to reset and to be inserted into the bored concrete pile 2 by taking the insertion rod 304 out through a constructor, and the cross beam 3 can also be used as a basement.
This kind of bored concrete pile deep basal pit supporting construction, including bored concrete pile 2, cement mixing pile 1, concrete pile 5, crossbeam 3 and foundation ditch bottom plate 4, the 4 outsides of foundation ditch bottom plate are equipped with a plurality of bored concrete pile 2, a plurality of bored concrete pile 2 transversely corresponds the setting with vertical, 2 outer ends of bored concrete pile enclose and are equipped with round cement mixing pile 1, every two opposite bored concrete piles 2 all connect crossbeam 3 among a plurality of bored concrete pile 2, the both sides of crossbeam 3 all are equipped with connecting device 30, the integration of a plurality of crossbeam 3 sets up, be equipped with on the bored concrete pile 2 and be used for connecting device 30 male inserted hole 20, the junction of a plurality of concrete pile 5 connection between crossbeam 3, concrete pile 5 installs on foundation ditch bottom plate 4.
The cement soil mixing pile 1 adopts a triaxial cement soil mixing pile 1, and a plurality of cement soil mixing piles are mutually communicated to form a space for water stopping.
As an improved specific embodiment, the connection device 30 is a plurality of connection rods, each connection rod includes a hollow telescopic head 300, a hollow fixing rod 301, a spring 302 and a housing 303, the hollow telescopic head 300, the hollow fixing rod 301 and the spring 302 are all located in the housing 303, a telescopic opening 3002 is arranged at the bottom of the hollow telescopic head 300, the spring 302 is arranged between the hollow fixing rod 301 and the housing 303, the hollow telescopic head 300 is corresponding to the spring 302, the hollow telescopic head 300 moves downwards to extrude the spring 302, the spring 300 resets upwards when the hollow telescopic head 300 is released, a top 3011 is arranged at the top of the hollow fixing rod 301, the top 3011 penetrates through the telescopic opening 3002 and is located in the hollow telescopic head 300, the diameter of the top 3011 is greater than that of the telescopic opening 3002, the connection rods are fixed to the housing 303, and the housing 303 is fixed to the beam 3.
When the retractable head is pressed inwards along the hollow fixing rod 301, the spring 302 is pressed, if the insertion rod 304 is not inserted into the retractable head, the retractable head is popped out and reset by the spring 302, and the diameter of the retractable opening 3002 at the tail part of the retractable head is smaller than that of the top 3011, so that the retractable head cannot be separated when being popped out.
As an improved specific embodiment, the bottom of the housing 303 is provided with an injection port 3014, the injection port 3014 is communicated with the inside of the hollow fixing rod 301, the side wall of the hollow fixing rod 301 is provided with a plurality of through holes 3013 and a first fixing hole 3012, the hollow telescopic head 300 is provided with a second fixing hole 3000 and a plurality of outlets 3001 matched with the first fixing hole 3012, the hollow telescopic head 300 is fixed by passing through the first fixing hole 3012 and the second fixing hole 3000 through the insertion rod 304, and the top 3011 is provided with an opening 3010.
The constructor passes inserted bar 304 through first fixed orifices 3012 and second fixed orifices 3000, just can fix cavity flexible head 300, when needs cavity flexible head 300 to pop out, take out inserted bar 304, spring 302 drives cavity flexible head 300 outwards to pop out, insert the inserted hole 20 of bored concrete pile 2, can fixed crossbeam 3, when pouring crossbeam 3, concretion thing can get into in cavity fixed lever 301 through entering notes mouth 3014, solidify spring 302 department through a plurality of through-hole 3013, can solidify cavity flexible head 300 and bored concrete pile 2 through export 3001 after filling in cavity flexible head 300, realize the reinforcement.
A construction method for a cast-in-situ bored pile deep foundation pit support comprises the following steps:
(1) and (3) constructing a waterproof curtain and a cast-in-situ bored pile 2: according to the foundation pit excavation sideline, the soil body of foundation pit side of envelope is consolidated by the cement mixing pile 1 of outer lane is beaten down at foundation pit sideline outer end, reserve out the position of drilling bored concrete pile 2 between cement mixing pile 1 and the foundation pit sideline, squeeze into the position of reserving between cement mixing pile 1 and the foundation pit with a plurality of drilling bored concrete piles 2 again, the horizontal all vertical one-to-one setting of a plurality of drilling bored concrete piles 2 encloses into the inner circle, forms inserted hole 20 through setting up the brick fetal membrane on the drilling bored concrete pile 2.
(2) Excavation of a foundation pit and pouring of a foundation pit bottom plate 4: adopting a central island type slope-laying according to proportion to excavate soil in the foundation pit, installing a foundation pit bottom plate 4 frame at the bottom of the foundation pit after the foundation pit is excavated, installing a concrete pile 5 frame on the foundation pit bottom plate 4 frame, and pouring concrete after the installation is finished.
(3) Assembling the cross beam 3: after the foundation pit bottom plate 4 and the concrete pile 5 frame are poured, the cross beam 3 is hoisted to the position of the insertion hole 20 of the cast-in-place brick, the position is adjusted to enable each hollow telescopic head 300 in the cross beam 3 connecting device 30 to be aligned to the corresponding insertion hole 20, the insertion rod 304 is pulled out, the hollow telescopic heads 300 are reset forwards through the acting force of the springs 302 and are inserted into the insertion holes 20 of the cast-in-place pile 2, and the cross beam 3 is poured after all the hollow telescopic heads 300 are inserted into the insertion holes 20.
As an improved specific implementation manner, in the step (1), the cast-in-situ bored pile 2 is cast, high-pressure grouting is performed on a high-pressure jet grouting pile hole when the strength of surrounding concrete reaches 75, a test tube is firstly used before grouting, various parameters of materials, types, proportions and mechanical operation of grout meet the design and parameter requirements, jet grouting is started when the pressure of a nozzle reaches the design requirement, and after jet grouting parameters reach specified values, a jet pipe is lifted according to the process requirements of high-pressure jet grouting immediately, and jet grouting is performed from bottom to top.
In a modified specific embodiment, in the step (3), the beam 3 casting direction is sequentially progressed from one end of the beam 3 to the other end. When approaching the other end, throw the material to opposite direction from one end instead, can avoid the concrete to produce incompact phenomena such as honeycomb, upper concrete must be in the closely knit back of lower floor concrete vibration can pour to guarantee that the concrete has good compactedness.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (3)
1. The utility model provides a bored concrete pile deep basal pit supporting construction, includes bored concrete pile (2), cement mixing pile (1), concrete pile (5), crossbeam (3) and foundation ditch bottom plate (4), its characterized in that: foundation ditch bottom plate (4) outside is equipped with a plurality of bored concrete pile (2), a plurality of bored concrete pile (2) transversely and vertical corresponding setting, bored concrete pile (2) outer end is enclosed and is equipped with round cement mixing pile (1), every two opposite bored concrete pile (2) all connect crossbeam (3) in a plurality of bored concrete pile (2), the both sides of crossbeam (3) all are equipped with connecting device (30), a plurality of crossbeam (3) integration sets up, be equipped with on bored concrete pile (2) and be used for connecting device (30) male inserted hole (20), the junction between crossbeam (3) is connected in a plurality of concrete pile (5), install on foundation ditch bottom plate (4) concrete pile (5).
2. The cast-in-situ bored pile deep foundation pit supporting structure according to claim 1, wherein: the connecting device (30) is a plurality of connecting rods, each connecting rod comprises a hollow telescopic head (300), a hollow fixing rod (301), a spring (302) and a shell (303), the hollow telescopic head (300), the hollow fixing rod (301) and the spring (302) are all located in the shell (303), a telescopic opening (3002) is formed in the bottom of the hollow telescopic head (300), the spring (302) is arranged between the hollow fixing rod (301) and the shell (303), the upper portion of the spring (302) corresponds to the hollow telescopic head (300), the hollow telescopic head (300) moves downwards to extrude the spring (302), the spring (302) is reset upwards when the hollow telescopic head (300) is released, a jacking head (3011) is arranged at the top of the hollow fixing rod (301), the jacking head (3011) penetrates through the telescopic opening (3002) and is located in the hollow telescopic head (300), and the diameter of the jacking head (3011) is larger than that of the telescopic opening (3002), the fixed rod is fixed with the shell (303), and the shell (303) is fixed on the cross beam (3).
3. The cast-in-situ bored pile deep foundation pit supporting structure according to claim 2, wherein: the utility model discloses a cavity telescopic head, including shell (303), first fixed orifices (3012) and cavity fixed rod (301), shell (303) bottom is equipped with into notes mouth (3014), it communicates with each other to advance notes mouth (3014) and cavity fixed rod (301) inside, be equipped with a plurality of through-hole (3013) and first fixed orifices (3012) on cavity fixed rod (301) lateral wall, be equipped with second fixed orifices (3000) and a plurality of export (3001) that match with first fixed orifices (3012) on cavity telescopic head (300), cavity telescopic head (300) are fixed through inserted bar (304) pass first fixed orifices (3012) and second fixed orifices (3000), top (3011) are equipped with opening (3010).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920182900.0U CN210216441U (en) | 2019-02-01 | 2019-02-01 | Deep foundation pit supporting structure for cast-in-situ bored pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920182900.0U CN210216441U (en) | 2019-02-01 | 2019-02-01 | Deep foundation pit supporting structure for cast-in-situ bored pile |
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| CN210216441U true CN210216441U (en) | 2020-03-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778872A (en) * | 2019-02-01 | 2019-05-21 | 百盛联合集团有限公司 | A kind of cast-in-situ bored pile deep foundation pit supporting structure and its construction method |
| CN112323788A (en) * | 2020-12-18 | 2021-02-05 | 中交三公局第三工程有限公司 | Anti-seismic cement mixing pile and construction method |
| CN115506362A (en) * | 2022-09-02 | 2022-12-23 | 中国建筑第二工程局有限公司 | Muddy soil body deep and shallow foundation pit supporting structure and construction method thereof |
-
2019
- 2019-02-01 CN CN201920182900.0U patent/CN210216441U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778872A (en) * | 2019-02-01 | 2019-05-21 | 百盛联合集团有限公司 | A kind of cast-in-situ bored pile deep foundation pit supporting structure and its construction method |
| CN109778872B (en) * | 2019-02-01 | 2024-09-06 | 百盛联合集团有限公司 | Deep foundation pit supporting structure of bored pile and construction method thereof |
| CN112323788A (en) * | 2020-12-18 | 2021-02-05 | 中交三公局第三工程有限公司 | Anti-seismic cement mixing pile and construction method |
| CN112323788B (en) * | 2020-12-18 | 2022-04-19 | 中交三公局第三工程有限公司 | Anti-seismic cement mixing pile and construction method |
| CN115506362A (en) * | 2022-09-02 | 2022-12-23 | 中国建筑第二工程局有限公司 | Muddy soil body deep and shallow foundation pit supporting structure and construction method thereof |
| CN115506362B (en) * | 2022-09-02 | 2023-07-25 | 中国建筑第二工程局有限公司 | Mucky soil deep and shallow foundation pit supporting structure and construction method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A type of deep foundation pit support structure using drilled cast-in-place piles Effective date of registration: 20231226 Granted publication date: 20200331 Pledgee: Industrial Bank Co.,Ltd. Wenzhou Branch Pledgor: BLOOMS GROUP CO.,LTD. Registration number: Y2023330003103 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |