CN107964958A - A kind of deep foundation pit precast overlaps pile construction method - Google Patents
A kind of deep foundation pit precast overlaps pile construction method Download PDFInfo
- Publication number
- CN107964958A CN107964958A CN201711247810.7A CN201711247810A CN107964958A CN 107964958 A CN107964958 A CN 107964958A CN 201711247810 A CN201711247810 A CN 201711247810A CN 107964958 A CN107964958 A CN 107964958A
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- pile
- foundation pit
- prefabricated
- construction method
- overlaps
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to the realm of building construction, and in particular to a kind of deep foundation pit precast overlaps pile construction method.This construction method comprises the following steps：A. drill at stake position；B. it is prefabricated pile is mounted in the bore；C. the priming petock soil between prefabricated pile and hole；D. repeat step a, step b and step c, install multiple prefabricated piles and priming petock soil around default foundation pit position, multiple prefabricated piles is formed building enclosure；E. the excavation pit in the region that building enclosure surrounds；F. prefabricated pile and agent structure side wall are connected.Deep foundation pit precast overlapping pile construction method provided by the invention can improve construction efficiency, reduce building waste, reduce project cost, have preferable market prospects.
Description
Technical field
The present invention relates to a kind of construction techniques, particularly a kind of deep foundation pit precast overlapping pile construction method.
Background technology
In the construction of existing deep foundation pit of construction, periphery building enclosure of typically first constructing, then from top to bottom earth excavation,
Cut stake top laitance and apply Guan Liang and concrete support, dig to the bottom of hole, then agent structure of from bottom to top constructing, and by certain suitable
Sequence removes support.This construction method has the disadvantages that：
In building enclosure work progress, the convergence time between each operation is longer, makes overall claim for eot, works together, and mixes
Solidifying soil scene perfusion, adds communication and logistics tissue, there is also hidden danger of quality in itself for pile body；
When applying Guan Liang support, stake top laitance need to be cut, a large amount of building wastes can be produced, except increasing working procedure
Outside, environment can also be adversely affected；
In later stage main structure construction, piling wall separation, is unfavorable for reducing project cost.
The content of the invention
The goal of the invention of the present invention is：In view of the problems of the existing technology, there is provided a kind of deep foundation pit precast congruent pile
Construction method.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of deep foundation pit precast overlaps pile construction method, comprises the following steps：
A. drill at stake position；
B. it is prefabricated pile is mounted in the bore；
C. priming petock soil in the gap between the prefabricated pile and the hole.
D. repeat step a, step b and step c, install multiple prefabricated piles and irrigate around default foundation pit position
Soil cement, makes multiple prefabricated piles form building enclosure；
E. the excavation pit in the region that the building enclosure surrounds；
F. the prefabricated pile and agent structure side wall are connected.
Deep foundation pit precast provided by the invention overlapping pile construction method in the construction process, prefabricated pile as building enclosure,
Phase after construction, prefabricated pile can be connected to form permanent structure with agent structure side wall again, without removing, so as to greatly
Reduce building waste.In addition, using prefabricated pilework replace it is cast-in-place, the quality of prefabricated pile can be enable to be effectively controlled,
So that pile body disclosure satisfy that the requirement of permanent structure, in addition, the mud contamination at the prefabricated pile scene of can effectively reducing, to environment
Influence smaller.
It is further comprising the steps of before the step b as the preferred solution of the present invention：
G. according to site operation arrangement, prefabricated pile is customized.
Before stake is installed, prefabricated pile is customized according to the actual conditions at scene, when helping to reduce the linking between process
Between, while prefabricated pile is made using customization mode, prefabricated pile can be made to can adapt to the demand of Different field situation.
As the preferred solution of the present invention, connector is embedded with the prefabricated pile, in the step f, passes through connection
Reinforcing bar and the connector in the agent structure side wall, realize the connection of the prefabricated pile and the agent structure side wall.
The connector is arranged at the stake top of the prefabricated pile and at pile body.
Connector is set in the pile body of prefabricated pile, prefabricated pile is realized by the reinforcing bar in connector and agent structure side wall
With being connected for side wall, easy to connect in constructing, it can ensure the intensity of connection.
Further, connector can also be set at the stake top position in prefabricated pile, so that during Guan Liang is applied,
Being connected for stake and Guan Liang is realized by stake top connector, so can be in order to avoid stake top laitance be cut, so as to reduce building waste.
As the preferred solution of the present invention, in the step c, pass through device for casting priming petock soil；
The device for casting includes storage slurry portion and conduit part, and the storage slurry portion is used to store soil cement, and the conduit part connects
The lower section with the storage slurry portion is connect, is used to be arranged in the hole below the conduit part.
By setting the size of conduit part, the speed of priming petock soil can be controlled.Device for casting is conducive to cement injection
The process of soil can be carried out at the uniform velocity, avoid quick filling from disturbing hole wall.At the same time cement is facilitated look at by customizing device for casting
Soil perfusion absolute altitude, avoids superfilled causing waste of material and environmental pollution.
As the preferred solution of the present invention, in step a, the fullness coefficient in hole is not less than 0.5, fullness coefficient for pore volume with
The difference of prefabricated pile volume and the ratio of pore volume.
Fullness coefficient is not less than 0.5, to ensure soil cement pouring quality.
It is further comprising the steps of after the step e as the preferred solution of the present invention：
H. the soil cement between foundation pit side wall and prefabricated pile is cut, exposes the pre-buried connector in prefabricated pile.
Further, in step h, by artificial chisel except the soil cement around connector, damage connector is avoided.Cut more
After remaining soil cement, connector can be exposed, be connected easy to connector with the reinforcing bar in agent structure side wall.
As the preferred solution of the present invention, in step b, pile extension platform is first installed, prefabricated pile is installed by pile extension platform
Into hole.
Pile extension platform includes levelling device, horizontal platform and pile extension mouth, and pile extension mouth is arranged on horizontal platform, pile extension mouth be used for it is pre-
Stake processed coordinates, and levelling device one end is connected with horizontal platform.
Using pile extension stage+module prefabricated pile, levelness and position by levelling device adjusting pile extension platform, Jin Erke
To adjust the verticality of prefabricated pile and position so that the installation accuracy of prefabricated pile can be guaranteed, while pacify installation process
It is complete reliable, security risk can be reduced.Specifically, levelling device can include multiple hydraulic cylinders, the length of hydraulic cylinder, energy are adjusted
Enough adjust the levelness of horizontal platform.
It is further comprising the steps of after the step f as the preferred solution of the present invention：
I. agent structure side wall concrete is constructed.
After the completion of foundation pit operation, concrete construction is carried out to agent structure side wall, makes agent structure side wall and prefabricated pile
Connection forms permanent structure, the water proof anti-seepage ability of enhancing structure.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
Deep foundation pit precast provided by the invention overlapping pile construction method in the construction process, prefabricated pile as building enclosure,
Phase after construction, prefabricated pile can be connected to form permanent structure with agent structure side wall again, without removing, so as to greatly
Reduce building waste.In addition, using prefabricated pilework replace it is cast-in-place, the quality of prefabricated pile can be enable to be effectively controlled,
So that pile body disclosure satisfy that the requirement of permanent structure.
Brief description of the drawings
Fig. 1 is the flow chart of deep foundation pit precast overlapping pile construction method provided by the invention.
Fig. 2 is the structure diagram of device for casting provided by the invention.
Fig. 3 is schematic diagram of the device for casting provided by the invention in priming petock soil.
Fig. 4 is schematic diagram when prefabricated pile provided by the invention is connected with side wall.
Icon：1- device for casting；12- liquid storing parts；14- conduit parts；2- prefabricated piles；22- connectors；4- agent structures side
Wall.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Embodiment
An embodiment of the present invention provides a kind of deep foundation pit precast to overlap pile construction method, and this deep foundation pit precast congruent pile is applied
Work method comprises the following steps：
J. prepare before construction；
A. drill at stake position；
B. it is prefabricated pile 2 is mounted in the bore；
C. priming petock soil in the gap between prefabricated pile 2 and hole；
D., multiple prefabricated piles 2, and concrete perfusion are installed around default foundation pit, multiple prefabricated piles 2 is formed and goes along with sb. to guard him
Structure；
E. the excavation pit in the region that building enclosure surrounds；
H. the soil cement between foundation pit side wall and prefabricated pile 2 is cut, exposes the connector 22 on prefabricated pile 2；
F. prefabricated pile 2 and agent structure side wall 4 are connected；
I. 4 concrete construction of agent structure side wall.
Specifically, in step j, prepare to include levelling of the land and surveying setting-out before constructing.Levelling of the land and surveying setting-out
Afterwards, it should be ensured that stake position it is accurate, and carry out the correction of deviation.
In step a, after drilling machine for drilling is in place, it can drill after should being checked to stake site.After drilling, need
Casing to be installed in hole, it is ensured that shield-tube embedment is accurate, horizontal, vertical, firm, and the surrounding backfill clay of casing is simultaneously tamped.
The fullness coefficient in hole is not less than 0.5, it is ensured that soil cement pouring quality.Fullness coefficient is hole and the volume of prefabricated pile 2
Difference and pore volume ratio.
Before step b, it is also necessary to carry out step g:According to site operation arrangement, prefabricated pile 2 is customized.
Pre-buried connector 22 is needed in the prefabricated pile 2 of customization.Connector 22 can be embedded at pile body, in order to prefabricated pile
2 are connected to form permanent structure with agent structure side wall 4；It can also be embedded at stake top, in order to which prefabricated pile 2 is connected with Guan Liang,
Stake top laitance process is cut so as to remove from.
In stepb, it is by pile extension platform that prefabricated pile 2 is mounted in the bore.
Specifically, pile extension platform includes levelling device, horizontal platform and pile extension mouth, pile extension mouth is arranged on horizontal platform, pile extension mouth
For coordinating with prefabricated pile 2, levelling device one end is connected with horizontal platform.Specifically, levelling device can include multiple hydraulic cylinders,
The length of hydraulic cylinder is adjusted, the levelness of horizontal platform can be adjusted.
Before prefabricated pile 2 is installed, first by pile extension stage+module around hole.Make pile extension mouth corresponding with hole, it is flat to pass through
Levelling device adjusts the levelness of horizontal platform, it is ensured that the levelness of horizontal platform.
In step c, pass through 1 priming petock soil of device for casting.
Device for casting 1 includes storage slurry portion 12 and conduit part 14, and storage slurry portion 12 is used to storing soil cement, the connection of conduit part 14 with
The lower section in slurry portion 12 is stored up, the lower section of conduit part 14 is used to be arranged in hole.
By setting the size of conduit part 14, the speed of priming petock soil can be controlled.Device for casting 1 is conducive to priming petock
The process of soil can be carried out at the uniform velocity, avoided quick filling disturbance hole wall and caused hole wall collapse.Pass through the perfusion of customization at the same time
1 priming petock soil of device, facilitates look at soil cement perfusion absolute altitude, avoids superfilled causing waste of material and environmental pollution.
In step d, step a, step b and step c is repeated several times, so that multiple prefabricated piles 2 are installed, and cement injection
Soil so that multiple prefabricated piles 2 form the building enclosure of foundation pit.
In step e, when being excavated to the outside of prefabricated pile 2 about 1m scopes, it is necessary to which special messenger is commanded, touched to avoid machine
Touch 2 pile body of prefabricated pile and destroy pile body structure.
In step h, the filling concrete soil of foundation pit side-wall and prefabricated pile 2 is using manually being cut, to avoid destruction
The pre-buried connector 22 of pile body.
In step f, by 4 main reinforcement of measurement and positioning mounting body structure side wall, to ensure that it meets design requirement；Reinforcing bar
Arrangement spacing and processing length are constructed in strict accordance with design.The pre-buried connector 22 of pile body must be by manually carrying out peeling off simultaneously really
Guarantor can be attached after cleaning out with the reinforcing bar in agent structure side wall 4.By connecting 22 He of connector on prefabricated pile
Reinforcing bar in agent structure side wall 4, realizes the connection of prefabricated pile 2 and agent structure side wall 4.
In step i, after the concrete construction of agent structure, prefabricated pile 2 is built up forever with agent structure side wall 4
Long structure.
The beneficial effect of deep foundation pit precast overlapping pile construction method provided by the invention is：
During excavation of foundation pit, building enclosure of the prefabricated pile 2 as foundation pit, after the completion of foundation pit construction, prefabricated pile 2 is again
Permanent structure can be built up with agent structure side wall 4, side wall thicknesses are thinned, can greatly reduce waste of material, lowered
Project cost, moreover it is possible to reduce building waste；
Prefabricated pile 2 produces prefabricated in advance in producer, reduces communication and logistics tissue, reduces on-site construction processes, accelerates
Construction speed, construction site only needs to carry out the installation of prefabricated pile 2, so as to be conducive to reduce the convergence time between process；
Prefabricated pile 2 is produced in batches by factory's industrialization, mud-less pollution and effectively controls pile quality, according to existing
The method stake poured, if the quality of stake is unable to meet demand, can cause security risk to foundation pit enclosure.And use institute of the present invention
The prefabricated pile 2 of offer, can descend stake again so that pile quality can be guaranteed after the quality meet demand of stake is confirmed；
At the scene by pile extension platform location and installation prefabricated pile 2, securely and reliably, security risk is reduced；
By construction method provided by the invention, can be floated by setting stake top connector instead of traditional stake top that cuts
Slurry, so as to not produce building waste, is more advantageous to environmental protection；
By 1 priming petock soil of device for casting, the perfusion of soil cement is symmetrically at the uniform velocity carried out, avoid producing hole wall
Excessive disturbance, and then ensure that soil cement irrigates compactness.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of deep foundation pit precast overlaps pile construction method, it is characterised in that comprises the following steps：
A. drill at stake position；
B. it is prefabricated pile is mounted in the bore；
C. priming petock soil in the gap between the prefabricated pile and the hole；
D. repeat step a, step b and step c, install multiple prefabricated piles and cement injection around default foundation pit position
Soil, makes multiple prefabricated piles form building enclosure；
E. the excavation pit in the region that the building enclosure surrounds；
F. the prefabricated pile and agent structure side wall are connected.
2. deep foundation pit precast according to claim 1 overlaps pile construction method, it is characterised in that before the step b,
It is further comprising the steps of：
G. according to site operation arrangement, prefabricated pile is customized.
3. deep foundation pit precast according to claim 1 overlaps pile construction method, it is characterised in that pre-buried in the prefabricated pile
There is connector, in the step f, by connecting reinforcing bar and the connector in the agent structure side wall, described in realization
The connection of prefabricated pile and the agent structure side wall.
4. deep foundation pit precast according to claim 3 overlaps pile construction method, it is characterised in that the connector is arranged on institute
State at the stake top of prefabricated pile and at pile body.
5. deep foundation pit precast according to claim 1 overlaps pile construction method, it is characterised in that in the step c, leads to
Cross device for casting priming petock soil；
The device for casting includes storage slurry portion and conduit part, and the storage slurry portion is used to storing soil cement, the conduit part connection with
The lower section in the storage slurry portion, the conduit part lower section are used to be arranged in the hole.
6. deep foundation pit precast according to claim 5 overlaps pile construction method, it is characterised in that in the step a, hole
Fullness coefficient be not less than 0.5, fullness coefficient for hole and prefabricated pile the difference of volume and the ratio of pore volume.
7. deep foundation pit precast according to claim 1 overlaps pile construction method, it is characterised in that after the step e,
It is further comprising the steps of：
H. the soil cement between foundation pit side wall and prefabricated pile is cut, exposes the pre-buried connector in prefabricated pile.
8. deep foundation pit precast according to claim 1 overlaps pile construction method, it is characterised in that in the step b, first pacifies
The prefabricated pile, is installed in the hole by attaching stake platform by the pile extension platform.
9. deep foundation pit precast according to claim 8 overlaps pile construction method, it is characterised in that the pile extension platform includes
Levelling device, horizontal platform and pile extension mouth, the pile extension mouth are arranged on the horizontal platform, and the pile extension mouth is used for and the prefabricated pile
Coordinate, described levelling device one end is connected with the horizontal platform.
10. deep foundation pit precast according to claim 1 overlaps pile construction method, it is characterised in that the step f it
Afterwards, it is further comprising the steps of：
I. agent structure side wall concrete is constructed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247810.7A CN107964958A (en) | 2017-11-27 | 2017-11-27 | A kind of deep foundation pit precast overlaps pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247810.7A CN107964958A (en) | 2017-11-27 | 2017-11-27 | A kind of deep foundation pit precast overlaps pile construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107964958A true CN107964958A (en) | 2018-04-27 |
Family
ID=61998698
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711247810.7A Pending CN107964958A (en) | 2017-11-27 | 2017-11-27 | A kind of deep foundation pit precast overlaps pile construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980063A (en) * | 2020-08-17 | 2020-11-24 | 济南轨道交通集团有限公司 | Subway open cut interval prefabricated box culvert laminated structure and construction method thereof |
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| CN201089893Y (en) * | 2007-09-06 | 2008-07-23 | 铁道第四勘察设计院 | Foundation pit circle shield prefabricated driven pile |
| CN101319498A (en) * | 2008-07-17 | 2008-12-10 | 万勇 | Lattice type prefabricated prestressed underground continuous wall and its construction method |
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| CN103590428A (en) * | 2013-11-28 | 2014-02-19 | 华东建筑设计研究院有限公司 | Connection method for basic raft and 'two-in-one' underground diaphragm wall |
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2017
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Patent Citations (4)
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|---|---|---|---|---|
| CN201089893Y (en) * | 2007-09-06 | 2008-07-23 | 铁道第四勘察设计院 | Foundation pit circle shield prefabricated driven pile |
| KR100912574B1 (en) * | 2008-04-25 | 2009-08-19 | 주식회사 씨에스구조엔지니어링 | Retaining wall system using strut assembly and excavating method using the same |
| CN101319498A (en) * | 2008-07-17 | 2008-12-10 | 万勇 | Lattice type prefabricated prestressed underground continuous wall and its construction method |
| CN103590428A (en) * | 2013-11-28 | 2014-02-19 | 华东建筑设计研究院有限公司 | Connection method for basic raft and 'two-in-one' underground diaphragm wall |
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| 周晓军等: "《城市地下铁道与轻轨交通》", 31 October 2016 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980063A (en) * | 2020-08-17 | 2020-11-24 | 济南轨道交通集团有限公司 | Subway open cut interval prefabricated box culvert laminated structure and construction method thereof |
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Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Applicant after: China Railway Second Bureau Construction Co.,Ltd. Applicant after: CHINA RAILWAY ERJU 1ST ENGINEERING Co.,Ltd. Address before: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Applicant before: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Applicant before: CHINA RAILWAY ERJU 1ST ENGINEERING Co.,Ltd. |
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Effective date of registration: 20190813 Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Applicant after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Applicant after: CHINA RAILWAY ERJU 1ST ENGINEERING Co.,Ltd. Address before: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Applicant before: China Railway Second Bureau Construction Co.,Ltd. Applicant before: CHINA RAILWAY ERJU 1ST ENGINEERING Co.,Ltd. |
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Application publication date: 20180427 |