CN114319323A - Construction method of upright post pile - Google Patents
Construction method of upright post pile Download PDFInfo
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- CN114319323A CN114319323A CN202210029336.5A CN202210029336A CN114319323A CN 114319323 A CN114319323 A CN 114319323A CN 202210029336 A CN202210029336 A CN 202210029336A CN 114319323 A CN114319323 A CN 114319323A
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- reinforcement cage
- suspension arm
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Abstract
The invention relates to the technical field of building construction, and discloses a method for constructing a vertical column pile.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a vertical column pile.
Background
In the field of construction, it is often necessary to provide a stud pile on a foundation as a structural stud for a building, which belongs to a load-bearing column for a building. The vertical column piles are required to be constructed before excavation, support is formed on a top plate of a building during excavation, and the vertical column piles serve as permanent support members of the building after the building is constructed.
The existing construction process is used for hoisting the reinforcement cage into the pile hole, and when the reinforcement cage is long, the connection between the reinforcement cage and a crane is unreasonable, and the operation in the hoisting process is unreasonable, so that the deformation of the reinforcement cage is easily caused, and the construction quality is affected.
Disclosure of Invention
The invention aims to provide a method for constructing a vertical column pile for preventing a reinforcement cage from deforming.
In order to achieve the above object, the present invention provides a method for constructing a stud pile, comprising the steps of:
s1, drilling holes at the pile positions through a drilling machine to form pile holes;
s21, connecting a first suspension arm of a crane with a first position of a reinforcement cage, connecting a second suspension arm of the crane with a second position of the reinforcement cage, connecting a third suspension arm of the crane with a third position of the reinforcement cage, and connecting a fourth suspension arm of the crane with a fourth position of the reinforcement cage;
s22, hoisting the reinforcement cage through the first suspension arm and the second suspension arm until the reinforcement cage leaves the ground, wherein the third suspension arm and the fourth suspension arm are in an unstrained state;
s23, controlling the third suspension arm and the fourth suspension arm to tighten the reinforcement cage, controlling the first suspension arm and the second suspension arm to descend, and enabling the reinforcement cage to overturn until the reinforcement cage is vertical to the horizontal plane;
s24, inserting the reinforcement cage into the pile hole;
s3, inserting the latticed column into the reinforcement cage;
and S4, grouting construction is carried out.
In some embodiments of this application, the first position is the bottom of steel reinforcement cage, the second position is the middle part of steel reinforcement cage and the position between the lower trisection point, the third position is the middle part of steel reinforcement cage and the position between the upper trisection point, the fourth position is the top rings department of steel reinforcement cage.
In some embodiments of the present application, before the step of S1, the following steps are further included:
and S01, lofting the pile position, and arranging pile casings around the pile position.
In some embodiments of the present application, in step S1:
and adjusting the levelness and the verticality of the drill bit every time the drill bit drills for a preset number of times.
In some embodiments of the present application, before the step of S3, the method further includes the following steps:
and S25, mounting the latticed column correcting frame to enable the latticed column correcting frame to be kept horizontal.
In some embodiments of the present application, before the step of S4, the following steps are further included:
and S31, fixing the latticed column at the center of the pile hole through a positioning steel bar.
In some embodiments of the present application, before step S3, the following steps are further included:
and S26, fixing a plurality of reinforcement stirrups on the top of the reinforcement cage.
In some embodiments of the present application, the step of S4 specifically includes the following steps:
s41, hoisting and lowering the grouting pipe;
s42, carrying out a hydrostatic test;
and S43, grouting.
In some embodiments of the present application, in step S43:
the grouting flow does not exceed a preset flow value.
The invention provides a construction method of a vertical column pile, which has the following beneficial effects compared with the prior art:
when the steel reinforcement cage that will transfer the installation is longer, adopt the setting of four hoisting points for lifting by crane of steel reinforcement cage and the position upset is comparatively steady, and the stress point dispersion on steel reinforcement cage for steel reinforcement cage non-deformable buckles, also promptly, the connection of steel reinforcement cage and loop wheel machine sets up comparatively rationally, and whole operation process sets up comparatively rationally, has guaranteed construction quality.
Drawings
Fig. 1 is a schematic flow chart of a method for constructing a stud pile according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that in the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e. a feature defined as "first", "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.
It should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1, an embodiment of the present invention provides a method for constructing a stud pile, including the following steps:
s1, drilling holes at the pile positions through a drilling machine to form pile holes;
s21, connecting a first suspension arm of the crane with a first position of the reinforcement cage, connecting a second suspension arm of the crane with a second position of the reinforcement cage, connecting a third suspension arm of the crane with a third position of the reinforcement cage, and connecting a fourth suspension arm of the crane with a fourth position of the reinforcement cage;
s22, hoisting the reinforcement cage through the first suspension arm and the second suspension arm until the reinforcement cage leaves the ground, wherein the third suspension arm and the fourth suspension arm are in an unstrained state;
s23, controlling the third suspension arm and the fourth suspension arm to tighten the reinforcement cage, and controlling the first suspension arm and the second suspension arm to descend to overturn the reinforcement cage until the reinforcement cage is vertical to the horizontal plane;
s24, inserting the reinforcement cage into the pile hole;
s3, inserting the latticed column into the reinforcement cage;
and S4, grouting construction is carried out.
Based on the method, when the steel reinforcement cage to be placed and installed is long, the four lifting points are arranged, so that the lifting and position overturning of the steel reinforcement cage are stable, the stress points are dispersed on the steel reinforcement cage, the steel reinforcement cage is not prone to deformation and bending, the connection arrangement of the steel reinforcement cage and the crane is reasonable, the arrangement of the whole operation process is reasonable, and the construction quality is guaranteed.
Optionally, in this embodiment, the first position is a bottom of the reinforcement cage, the second position is a position between a middle portion and a lower trisection point of the reinforcement cage, the third position is a position between the middle portion and an upper trisection point of the reinforcement cage, and the fourth position is a top hanging ring of the reinforcement cage. Based on this, the position distribution of four hoisting points is comparatively even for the installation of lifting by crane of steel reinforcement cage is non-deformable.
Optionally, in this embodiment, before the step of S1, the method further includes the following steps:
and S01, lofting at the pile position, and arranging pile casings around the pile position. Preferably, measurement lofting is carried out, pile positions are accurately measured, cross-shaped guard piles are additionally arranged around the central pile position, the guard cylinders are buried and dug to be 0.5-1.0 m below the ground, clay with the optimal water content is symmetrically and uniformly backfilled around the guard cylinders after the burying, the guard cylinders are tamped in layers, and the guard cylinders are pulled out within 24 hours after underwater concrete pouring.
Optionally, in this embodiment, in step S1, after the drilling machine is in place, the mud pump and the drilling machine are started to start drilling. During initial drilling, the slurry pump and the rotary table are started to idle for a preset time, the preset time is 1-10min, and after the slurry is conveyed into the drill rod, drilling can be started. And when the hole is cleaned for the first time after the drill is in place, lifting the drilling tool away from the bottom of the hole by 15-25 cm, and cleaning the hole by adopting high-density, high-viscosity and low-sand-content high-quality slurry.
Optionally, in this embodiment, in step S1:
and adjusting the levelness and the verticality of the drill bit every time the drill bit drills for a preset number of times. Preferably, the predetermined number of times is 3-5 times. So, can effectively guarantee that the straightness that hangs down of pore-forming is less than 1/100 stake length.
Optionally, in this embodiment, the lattice column is manufactured on site, a concrete-hardened terrace is selected for the manufacturing site, blanking is performed strictly according to the designed length, the angle iron needs to be corrected before assembling, the allowable deviation in the blanking length is ± 5 mm, and the allowable deviation of local deformation is ± 2 mm. The lattice column is respectively provided with two water stop steel plates at the positions 100-300mm away from the bottom of the bottom plate and the top of the bottom plate, and the width of the water stop steel plates is 50-150mm, so that water leakage and water seepage are prevented.
Optionally, in this embodiment, before the step of S3, the method further includes the following steps:
and S25, mounting the latticed column correcting frame to enable the latticed column correcting frame to be kept horizontal. Specifically, the latticed column correcting frame is firmly connected with the two running track plates or the steel plates, and the correcting frame is adjusted to ensure the level.
Optionally, in this embodiment, before the step of S4, the method further includes the following steps:
and S31, fixing the latticed column at the center of the pile hole through the positioning steel bar. Specifically, a lattice column is placed downwards, the lattice column is inserted into a position 1-3m below the designed top elevation of the drilled pile, each side face of the lattice column is firmly welded with two main reinforcements of a reinforcement cage, double-face welding is adopted, the length of a welding line is not less than 5d, and the lattice column is fixed at the center of a pile hole through a positioning reinforcement.
Optionally, in this embodiment, before step S3, the method further includes the following steps:
and S26, fixing a plurality of reinforcement stirrups at the top of the reinforcement cage. Therefore, the reinforcement cage can be ensured not to deform in the lowering process.
Optionally, in this embodiment, the step S4 specifically includes the following steps:
s41, hoisting and lowering the grouting pipe; specifically, after the guide pipe is well arranged, the grouting pipe is symmetrically and vertically inserted into the holes from the inner side of the lattice column and is inserted into the position 0.1m above the pile bottom, and the grouting range is 1.5m below the pile and is 1.5m in diameter. The grouting pipe is adjusted, installed and lowered section by section through the upper opening of the lattice column and connected, and the perpendicularity of the grouting pipe must be guaranteed during lowering.
S42, carrying out a hydrostatic test; specifically, the hydraulic test has the functions of pre-pressing and dredging the grouting channel so as to check the grouting performance and the performance of the grouting pipe and prepare for grouting. The concrete steps are that high-pressure water is used for injecting into a grouting channel 2-7 days after pile forming, namely, pressure water is pressed into a grouting pipe through a grouting pump, and the plug opening pressure is 2-10 MPa generally. When the pressure of the pressed water is suddenly reduced, the nozzle of the grouting pipe is opened, water injection is kept for 3-5 minutes, and the water inlet pressure is uniformly reduced, so that the situation that the high-pressure water flows back and is carried with impurities to block a grouting hole is avoided. The water pressing amount is generally controlled to be 0.2-0.6 m3And the water pressing time is 3-5 minutes.
And S43, grouting. Specifically, the distance between the grouting operation and a hole forming operation point is not less than 8-10 m; the pile end grouting is to sequentially implement equivalent grouting on each grouting guide pipe of the same pile; after the cement slurry is stirred, the cement slurry can enter a grouting pump after being filtered; when grouting, firstly, cement paste with a water-cement ratio of about 0.6 is pressed in, and then cement paste with a water-cement ratio of 0.4-0.5 is gradually adopted. When the grouting pressure is lower than a normal value for a long time, or grout is blown out from the ground or pile holes around the ground are strung, grouting is changed into interval grouting, the interval time is 30-60 min, or the water-cement ratio of the grout is reduced.
Optionally, in this embodiment, in step S43:
the grouting flow does not exceed a preset flow value. Preferably, the predetermined flow value is 75L/min. Based on this, the grouting unevenness can be prevented.
In summary, the embodiment of the invention provides a method for constructing a column pile, and compared with the prior art, the method for constructing the column pile has the advantages of preventing a reinforcement cage from deforming and the like.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A construction method of a vertical column pile is characterized by comprising the following steps:
s1, drilling holes at the pile positions through a drilling machine to form pile holes;
s21, connecting a first suspension arm of a crane with a first position of a reinforcement cage, connecting a second suspension arm of the crane with a second position of the reinforcement cage, connecting a third suspension arm of the crane with a third position of the reinforcement cage, and connecting a fourth suspension arm of the crane with a fourth position of the reinforcement cage;
s22, hoisting the reinforcement cage through the first suspension arm and the second suspension arm until the reinforcement cage leaves the ground, wherein the third suspension arm and the fourth suspension arm are in an unstrained state;
s23, controlling the third suspension arm and the fourth suspension arm to tighten the reinforcement cage, controlling the first suspension arm and the second suspension arm to descend, and enabling the reinforcement cage to overturn until the reinforcement cage is vertical to the horizontal plane;
s24, inserting the reinforcement cage into the pile hole;
s3, inserting the latticed column into the reinforcement cage;
and S4, grouting construction is carried out.
2. The method of constructing a post pile according to claim 1, wherein:
the first position is the bottom of the steel reinforcement cage, the second position is the position between the middle of the steel reinforcement cage and the lower trisection point, the third position is the position between the middle of the steel reinforcement cage and the upper trisection point, and the fourth position is the top hanging ring of the steel reinforcement cage.
3. The method of constructing a post pile according to claim 1, further comprising, before the step of S1, the steps of:
and S01, lofting the pile position, and arranging pile casings around the pile position.
4. The method of constructing a post pile according to claim 1, wherein in the step S1:
and adjusting the levelness and the verticality of the drill bit every time the drill bit drills for a preset number of times.
5. The method of constructing a post pile according to claim 1, further comprising, before the step of S3, the steps of:
and S25, mounting the latticed column correcting frame to enable the latticed column correcting frame to be kept horizontal.
6. The method of constructing a post pile according to claim 1, further comprising, before the step of S4, the steps of:
and S31, fixing the latticed column at the center of the pile hole through a positioning steel bar.
7. The method of constructing a post pile according to claim 1, further comprising, before step S3, the steps of:
and S26, fixing a plurality of reinforcement stirrups on the top of the reinforcement cage.
8. The method for constructing a vertical column pile according to claim 1, wherein the step S4 specifically includes the steps of:
s41, hoisting and lowering the grouting pipe;
s42, carrying out a hydrostatic test;
and S43, grouting.
9. The method of constructing a post pile according to claim 8, wherein in the step S43:
the grouting flow does not exceed a preset flow value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210029336.5A CN114319323A (en) | 2022-01-11 | 2022-01-11 | Construction method of upright post pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210029336.5A CN114319323A (en) | 2022-01-11 | 2022-01-11 | Construction method of upright post pile |
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| CN114319323A true CN114319323A (en) | 2022-04-12 |
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| CN202210029336.5A Pending CN114319323A (en) | 2022-01-11 | 2022-01-11 | Construction method of upright post pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703834A (en) * | 2022-05-06 | 2022-07-05 | 江苏南通二建集团有限公司 | Lattice column hoisting precision control construction method |
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| CN111622227A (en) * | 2020-06-05 | 2020-09-04 | 成都建工集团有限公司 | Hoisting construction method for anti-slide pile reinforcement cage |
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2022
- 2022-01-11 CN CN202210029336.5A patent/CN114319323A/en active Pending
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| JP2002097718A (en) * | 2000-09-25 | 2002-04-05 | Konoike Constr Ltd | Erection method for steel-pipe column |
| CN102070071A (en) * | 2011-01-17 | 2011-05-25 | 化学工业岩土工程有限公司 | Steel reinforcement cage hoisting method |
| CN102328881A (en) * | 2011-08-31 | 2012-01-25 | 中国建筑第二工程局有限公司 | Device and method for hoisting entire oversized steel reinforcement cage in one step |
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Non-Patent Citations (1)
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Cited By (1)
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| CN114703834A (en) * | 2022-05-06 | 2022-07-05 | 江苏南通二建集团有限公司 | Lattice column hoisting precision control construction method |
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