CN106120721B - Multi-layer bottom-expanding manual hole digging cast-in-place pile and construction method - Google Patents
Multi-layer bottom-expanding manual hole digging cast-in-place pile and construction method Download PDFInfo
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- CN106120721B CN106120721B CN201610698114.7A CN201610698114A CN106120721B CN 106120721 B CN106120721 B CN 106120721B CN 201610698114 A CN201610698114 A CN 201610698114A CN 106120721 B CN106120721 B CN 106120721B
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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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
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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
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a multi-layer expanded-base manual hole-digging cast-in-place pile, wherein a pile body of the cast-in-place pile comprises at least two pile-end holding layers, a reinforcement cage penetrating and inserted into the pile-end holding layers and an annular reinforcement framework, each holding layer comprises a frustum-shaped inner cavity, a concrete protective wall is poured on the inner cavity wall, the bottom of an expanded head of each holding layer is annular and is provided with the reinforcement framework, and the reinforcement cage penetrates through the reinforcement framework and is fixedly connected with the reinforcement framework through a connecting rib. The beneficial effects are that: the vertical bearing capacity of the single pile can be improved, and the horizontal bearing capacity and the uplift bearing capacity of the pile are greatly improved. The pile has the advantages of high construction efficiency, short construction period, good pile body quality, low construction cost, higher economy, innovativeness and social benefit.
Description
Technical field
The invention belongs to geotechnical engineering field more particularly to a kind of multilayer base expanding and base expanding manually digging hole filling pile and construction methods.
Background technique
There are when multilayer bearing course at pile end in pile body length range, only an expansion is arranged at stake bottom in traditional club-footed pile
Major part, vertical bearing capacity of single pile are low.Traditional artificial club-footed pile, expanded head part position usually not arrangement of reinforcement, stake horizontal bearing capacity and anti-
It is lower to pull out bearing capacity ratio.The advantage that traditional artificial digging pile increases bearing capacity of single pile without playing multilayer supporting course well,
The bearing capacity of single pile that unit concrete provides is less, and sexual valence is relatively low.Project cost is at high cost.
Summary of the invention
In view of the above shortcomings of the prior art, the invention proposes a kind of multilayer base expanding and base expanding manually digging hole filling pile and construction parties
Method is specifically implemented by following scheme:
The pile body of the multilayer base expanding and base expanding manually digging hole filling pile, the bored concrete pile includes at least two bearing course at pile end, wears
The steel reinforcement cage of the bearing course at pile end and the framework of steel reinforcement of annular are inserted in, contains pyramidal inner cavity in each supporting course, and
Pouring concrete guard wall on internal chamber wall, the bottom of the enlarged footing of each supporting course in a ring and is equipped with the framework of steel reinforcement,
The steel reinforcement cage is across framework of steel reinforcement and affixed by dowel and framework of steel reinforcement.
The further design of the multilayer base expanding and base expanding manually digging hole filling pile is that the framework of steel reinforcement is divided into upper and lower two layers,
The lower layer of the framework of steel reinforcement is located on corresponding bearing course at pile end enlarged footing bottom, framework of steel reinforcement by several sectors framework of steel reinforcement
Block composition, framework of steel reinforcement block are made of block main reinforcement, and it is same to be in steel hoop skeleton along the radial distribution of framework of steel reinforcement block for block main reinforcement
It one radial position and is located at bilevel piece of main reinforcement of framework of steel reinforcement and forms a chunking main reinforcement group, each piece of main reinforcement group difference
It is correspondingly connected with by a main reinforcement of two dowels and steel reinforcement cage.
The further design of the multilayer base expanding and base expanding manually digging hole filling pile is that the framework of steel reinforcement block is by least two groups block
Main reinforcement group composition, the short muscle of connection that the neighboring edge muscle of adjacent framework of steel reinforcement block is equipped with crotch by several both ends, which is realized, to be connected
It connects, the edge muscle passes through metal binding wire realization fixation with short muscle is connect.
The further design of the multilayer base expanding and base expanding manually digging hole filling pile is that the both ends of described piece of main reinforcement are respectively welded
Nut.
The further design of the multilayer base expanding and base expanding manually digging hole filling pile is that described dowel one end is with crotch
Connecting pin, the other end are fixing end.
The further design of the multilayer base expanding and base expanding manually digging hole filling pile is that the main reinforcement of the steel reinforcement cage corresponds respectively to
Two stiffening rings are respectively welded in the enlarged footing bottom of each bearing course at pile end, corresponding framework of steel reinforcement upper layer horizontal line.
The further design of the multilayer base expanding and base expanding manually digging hole filling pile is that the dowel is connected to corresponding blocks main reinforcement
Two nuts, and fixing end and dowel weld, and the crotch of connecting pin is connected in the stiffening ring, and solid by metal binding wire
It is fixed.
The further design of the multilayer base expanding and base expanding manually digging hole filling pile is, the lower layer of the framework of steel reinforcement and corresponding stake
Hold the concrete cushion that annular is equipped between supporting course enlarged footing bottom.
The construction method of the multilayer base expanding and base expanding manually digging hole filling pile, includes the following steps:
1) measuring of stake position, then hand excavation's stake holes, and pouring reinforcement concrete retaining wall are carried out；
2) piecemeal double steel bar skeleton and steel reinforcement cage are made；
3) breast wall concrete intensity continues to excavate stake holes after reaching setting intensity；
4) step 1), step 3) are repeated, carries out current bearing course at pile end base expanding and base expanding by design size；
5) base expanding and base expanding end ring shape concrete cushion is poured, and places double steel bar skeleton block and adjacent framework of steel reinforcement block is adjacent
Close edge muscle forms the double steel bar skeleton of annular by steel wire lashing, completes the building of current bearing course at pile end；
6) step 3), step 4), step 5) are repeated, the building of all bearing course at pile end is completed；
7) steel reinforcement cage is placed, simultaneously metal binding wire will connect with steel reinforcement cage main reinforcement installation dowel by double steel bar skeleton main reinforcement
Muscle is fixed with stiffening ring on fixed steel bars cage；
8) downcomer, casting concrete pile.
The further design of the construction method of the multilayer base expanding and base expanding manually digging hole filling pile is, described in the step 3)
Intensity is set as 70%.
Beneficial effects of the present invention
Multilayer base expanding and base expanding manually digging hole filling pile of the invention, making full use of in the long range of stake has the preferable stake of multilayer to support power
Layer advantage, greatly improves pile bearing capacity.The stake solves traditional club-footed pile expanded head part position not arrangement of reinforcement problem, pacifies at multilayer reaming
Steel loading tendons skeleton simultaneously securely connect with steel reinforcement cage, vertical bearing capacity of single pile not only can be improved but also substantially increases the horizontal bearing capacity of stake
With anti-pulling capacity.The pile driving construction is high-efficient, short construction period, and pile quality is good, and project cost is low, have higher economy,
Innovative and social benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multilayer base expanding and base expanding manually digging hole filling pile of the invention.
Fig. 2 is the top view of multilayer base expanding and base expanding manually digging hole filling pile.
Fig. 3 is enlarged diagram at the A of the top view of Fig. 2 multilayer base expanding and base expanding manually digging hole filling pile.
Fig. 4 is the BB cross-sectional view of the top view of Fig. 2 multilayer base expanding and base expanding manually digging hole filling pile.
Fig. 5 is the schematic diagram of multilayer base expanding and base expanding construction of manual-excavation cast-in-place pile method and step one.
Fig. 6 is the schematic diagram of multilayer base expanding and base expanding construction of manual-excavation cast-in-place pile method and step three.
Fig. 7 is the schematic diagram of multilayer base expanding and base expanding construction of manual-excavation cast-in-place pile method and step four.
Fig. 8 is the schematic diagram of multilayer base expanding and base expanding construction of manual-excavation cast-in-place pile method and step five.
Fig. 9 is the schematic diagram of multilayer base expanding and base expanding construction of manual-excavation cast-in-place pile method and step six.
Figure 10 is the schematic diagram of multilayer base expanding and base expanding construction of manual-excavation cast-in-place pile method and step seven.
Figure 11 is the schematic diagram of multilayer base expanding and base expanding construction of manual-excavation cast-in-place pile method and step eight.
Specific embodiment
Technical solution of the present invention is further illustrated with reference to the accompanying drawing.
Such as Fig. 1, the multilayer base expanding and base expanding manually digging hole filling pile of the present embodiment, the pile body master of bored concrete pile is three bearing course at pile end
6 designs, using there is the preferable bearing course at pile end advantage of multilayer in the long range of stake, greatly improve pile bearing capacity.In order to improve list
Pile vertical carrying capacity, horizontal bearing capacity and anti-pulling capacity, reinforcing bar of the present embodiment in each bearing course at pile end setting annular
Skeleton 1.The steel reinforcement cage 2 for being interspersed in bearing course at pile end is passed through into framework of steel reinforcement 1.Containing pyramidal in each bearing course at pile end 6
Inner cavity 4, and concrete guard wall 5 has been poured on internal chamber wall.The bottom of the enlarged footing of each supporting course is in a ring and equipped with reinforcing bar
Skeleton 1.The main reinforcement of steel reinforcement cage be distributed vertically and by dowel and framework of steel reinforcement it is affixed.Steel reinforcement cage 2 is in cylinder.
Such as Fig. 2, framework of steel reinforcement is divided into upper and lower two layers.The lower layer of framework of steel reinforcement 1 is located at corresponding bearing course at pile end enlarged footing bottom
In portion.For the ease of the installation and carrying of framework of steel reinforcement, the present embodiment framework of steel reinforcement 1 by six fan-shaped framework of steel reinforcement blocks 11 according to
The case where secondary connection composition, distribution is bright to be not limited to six pieces, other can be with equivalent replacement, this embodiment is not repeated.Framework of steel reinforcement block
It is made of block main reinforcement, radial distribution of the block main reinforcement along framework of steel reinforcement block.In the same radial position of steel hoop skeleton and difference
Block main reinforcement positioned at framework of steel reinforcement upper layer and lower layer end face forms a chunking main reinforcement group 15, referring to fig. 4.Each piece of main reinforcement group 15 is distinguished
It is correspondingly connected with by a main reinforcement 21 of two dowels 3 and steel reinforcement cage 2.The block main reinforcement quantity and steel reinforcement cage of framework of steel reinforcement single layer
Main reinforcement quantity it is identical.
Further, such as Fig. 3, framework of steel reinforcement block 11 is made of three chunking main reinforcements 15, distribute it is bright is not limited to three groups, other can
The case where with equivalent replacement, this embodiment is not repeated.The neighboring edge muscle 14 of adjacent framework of steel reinforcement block 11 passes through several both ends
The short muscle 13 of connection equipped with crotch realizes connection, and edge muscle 14 passes through with short muscle 13 is connect in the crotch and edge for connecting short muscle 13
Metal binding wire, which is realized, on muscle 14 fixes.
Such as Fig. 4, the both ends of block main reinforcement 15 are respectively welded nut 121.One end of dowel 3 is the connection with crotch 31
End 32, the other end are fixing end 33.The main reinforcement 21 of steel reinforcement cage 2 corresponds respectively to the enlarged footing bottom, right of each bearing course at pile end 6
Answer framework of steel reinforcement upper layer horizontal line that two stiffening rings 211 are respectively welded.Dowel 3 is connected to two nuts of corresponding blocks main reinforcement 12
In 121, and fixing end 33 and dowel 3 weld.The crotch 31 of connecting pin 32 is connected in stiffening ring 211, and passes through binding steel
Silk is fixed.
The concrete cushion of annular is equipped between the lower layer of framework of steel reinforcement and corresponding bearing course at pile end enlarged footing bottom.Annular
The difference of the width of concrete cushion, that is, enlarged footing radius and stake radius is 100mm.The diameter of annular concrete bed course inner ring is under
The identical diameter slightly larger than 2 cross section of steel reinforcement cage of the bore of one layer of bearing course at pile end.
The present embodiment provides a kind of corresponding construction method according to above-mentioned multilayer base expanding and base expanding manually digging hole filling pile, including
Following steps:
1) measuring of stake position, then hand excavation's stake holes, and pouring reinforcement concrete retaining wall, such as Fig. 5 are carried out.
2) piecemeal double steel bar skeleton and steel reinforcement cage are made.
3) breast wall concrete intensity continues to excavate stake holes, such as Fig. 6 after reaching setting intensity.
4) step 1), step 3) are repeated, carries out current bearing course at pile end base expanding and base expanding, such as Fig. 7 by design size.
5) base expanding and base expanding end ring shape concrete cushion is poured, and places double steel bar skeleton block and adjacent framework of steel reinforcement block is adjacent
Close edge muscle forms the double steel bar skeleton of annular by steel wire lashing, completes the building of current bearing course at pile end, such as Fig. 8.
6) step 3), step 4), step 5) are repeated, the building of all bearing course at pile end, such as Fig. 9 are completed.
7) steel reinforcement cage is placed, simultaneously metal binding wire will connect with steel reinforcement cage main reinforcement installation dowel by double steel bar skeleton main reinforcement
Muscle is fixed with stiffening ring on fixed steel bars cage, and the base expanding and base expanding bottom of the bottom is arc surface, referring to Figure 10.
8) downcomer, casting concrete pile, referring to Figure 11.
More preferably scheme are as follows: set intensity as 70% in step 3).
The multilayer base expanding and base expanding manually digging hole filling pile of the present embodiment, making full use of in the long range of stake has the preferable stake of multilayer to support
Power layer advantage, greatly improves pile bearing capacity.The stake solves traditional club-footed pile expanded head part position not arrangement of reinforcement problem, at multilayer reaming
Installation framework of steel reinforcement simultaneously securely connect with steel reinforcement cage, vertical bearing capacity of single pile not only can be improved but also substantially increases the horizontal bearing of stake
Power and anti-pulling capacity.The pile driving construction is high-efficient, short construction period, and pile quality is good, and project cost is low, has higher economy
Property, novelty and social benefit.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention it is not limited to this, appoint
What those familiar with the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its this
Inventive concept is subject to equivalent substitution or change, is all included within the scope of the present invention.
Claims (7)
1. a kind of multilayer base expanding and base expanding manually digging hole filling pile, it is characterised in that the pile body of the bored concrete pile includes at least two and supports
The framework of steel reinforcement of power layer, the steel reinforcement cage for being interspersed in the bearing course at pile end and annular, containing pyramidal in each supporting course
Inner cavity, and concrete guard wall has been poured on internal chamber wall, the bottom of the enlarged footing of each supporting course is in a ring and equipped with the steel
Tendons skeleton, the steel reinforcement cage are across framework of steel reinforcement and affixed by dowel and framework of steel reinforcement；The framework of steel reinforcement is divided into above and below
Two layers, the lower layer of the framework of steel reinforcement is located on corresponding bearing course at pile end enlarged footing bottom, framework of steel reinforcement by several sectors steel
Tendons skeleton block composition, framework of steel reinforcement block are made of block main reinforcement, and block main reinforcement is in steel hoop along the radial distribution of framework of steel reinforcement block
It the same radial position of skeleton and is located at bilevel piece of main reinforcement of framework of steel reinforcement and forms a chunking main reinforcement group, each piece of main reinforcement
Group is correspondingly connected with by a main reinforcement of two dowels and steel reinforcement cage respectively；The framework of steel reinforcement block is by least two groups block main reinforcement
Group composition, the short muscle of connection that the neighboring edge muscle of adjacent framework of steel reinforcement block is equipped with crotch by several both ends realize connection, institute
It states edge muscle and passes through metal binding wire realization fixation with short muscle is connect；The both ends of described piece of main reinforcement are respectively welded nut.
2. multilayer base expanding and base expanding manually digging hole filling pile according to claim 1, it is characterised in that described dowel one end is with curved
The connecting pin of hook, the other end are fixing end.
3. multilayer base expanding and base expanding manually digging hole filling pile according to claim 2, it is characterised in that the main reinforcement of the steel reinforcement cage is right respectively
Two stiffening rings should be respectively welded in the enlarged footing bottom of each bearing course at pile end, corresponding framework of steel reinforcement upper layer horizontal line.
4. multilayer base expanding and base expanding manually digging hole filling pile according to claim 3, it is characterised in that the dowel is connected to corresponding blocks
Two nuts of main reinforcement, the crotch of connecting pin are connected in the stiffening ring, and are fixed by metal binding wire.
5. multilayer base expanding and base expanding manually digging hole filling pile according to claim 1, it is characterised in that the lower layer of the framework of steel reinforcement with it is right
Answer the concrete cushion that annular is equipped between bearing course at pile end enlarged footing bottom.
6. the construction method of multilayer base expanding and base expanding manually digging hole filling pile according to claim 1-5, it is characterised in that
Include the following steps:
1) stake position measuring, hand excavation's stake holes, pouring reinforcement concrete form retaining wall；
2) piecemeal double steel bar skeleton and steel reinforcement cage are made；
3) breast wall concrete intensity continues to excavate stake holes after reaching design strength；
4) step 1), step 3) are repeated, carries out current bearing course at pile end base expanding and base expanding by design size；
5) enlarged footing annular concrete bed course is poured, and places double steel bar skeleton block and adjacent framework of steel reinforcement block is adjoining
Edge muscle forms the double steel bar skeleton of annular by steel wire lashing, completes the building of current bearing course at pile end；
6) step 3), step 4), step 5) are repeated, the building of all bearing course at pile end is completed；
7) steel reinforcement cage is placed, block main reinforcement, steel reinforcement cage main reinforcement are installed into dowel, and metal binding wire will be on dowel and steel reinforcement cage
Stiffening ring fix；
8) downcomer, casting concrete pile.
7. the construction method of multilayer base expanding and base expanding manually digging hole filling pile according to claim 6, it is characterised in that in the step 3)
The design strength is 70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610698114.7A CN106120721B (en) | 2016-08-19 | 2016-08-19 | Multi-layer bottom-expanding manual hole digging cast-in-place pile and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610698114.7A CN106120721B (en) | 2016-08-19 | 2016-08-19 | Multi-layer bottom-expanding manual hole digging cast-in-place pile and construction method |
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| Publication Number | Publication Date |
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| CN106120721A CN106120721A (en) | 2016-11-16 |
| CN106120721B true CN106120721B (en) | 2018-12-25 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487270A (en) * | 2018-06-15 | 2018-09-04 | 华东交通大学 | A kind of friction pile and construction method |
| CN112081102A (en) * | 2020-07-29 | 2020-12-15 | 浙江中正岩土技术有限公司 | Large-diameter cast-in-situ bored pile and construction method thereof |
| CN114482022A (en) * | 2021-12-06 | 2022-05-13 | 中铁二院北方勘察设计有限责任公司 | Construction method of prestressed manual hole digging pile |
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| CN105507340A (en) * | 2015-12-10 | 2016-04-20 | 南阳理工学院 | Construction method of bridge pile foundation in mountainous area |
| CN205917692U (en) * | 2016-08-19 | 2017-02-01 | 化学工业岩土工程有限公司 | Multilayer expands end manual work and digs hole bored concrete pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07102556A (en) * | 1993-10-05 | 1995-04-18 | Taisei Corp | Reinforcing structure of cast-in-place concrete pile |
| CN2247195Y (en) * | 1996-01-12 | 1997-02-12 | 刘瑞祺 | Bottle gourd pile |
| CN201062358Y (en) * | 2007-07-23 | 2008-05-21 | 安蓉建设总公司 | Reinforcement cage for end oversized grout pile |
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Address after: 210031 building 4, Yangzi science and technology innovation headquarters base, No.5, Pudong North Road, Jiangbei new district, Nanjing City, Jiangsu Province Patentee after: China Chemical Civil Engineering Co.,Ltd. Address before: Liuhe Dachang District of Nanjing City, Jiangsu province 210044 Yang Road No. 357 Patentee before: CHEMICAL INDUSTRY GEOTECHNICAL ENGINEERING Co.,Ltd. |