CN112575770A - Stratum drilling cast-in-place pile with soft upper part and hard lower part - Google Patents
Stratum drilling cast-in-place pile with soft upper part and hard lower part Download PDFInfo
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- CN112575770A CN112575770A CN202011496969.4A CN202011496969A CN112575770A CN 112575770 A CN112575770 A CN 112575770A CN 202011496969 A CN202011496969 A CN 202011496969A CN 112575770 A CN112575770 A CN 112575770A
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- reinforcement cage
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- sleeve
- concrete
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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
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- 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
- E02D15/06—Placing concrete under water
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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
- E02D5/66—Mould-pipes or other moulds
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a stratum drilling cast-in-place pile with a soft upper part and a hard lower part, which comprises a foundation, a strongly weathered granite layer, coarse sand, silty clay, mucky soil, a pore-forming part, a sleeve, a drill rod, a drilling tooth, a down-the-hole hammer, a reinforcement cage, a vertical reinforcement, a connecting rib and a concrete filling mechanism. The invention has the beneficial effects that: the drilling rod and the outer sleeve are combined to drill, the outer sleeve protects the wall, the drilling rod is convenient to continuously remove soil, the overall rigidity is strong, the drilling force is large, the hole forming precision is high, the drilling rod can deal with the powerful drilling of various complex strata, the construction of multiple construction methods is suitable, the sleeve follows the protecting wall to replace a slurry protecting wall in the drilling rod drilling process, the pollution of slurry to the environment is convenient to reduce, a drilling rod drill bit and the outer sleeve are combined to drill, the hole forming is convenient to realize quickly, less dust and low noise are generated in the hole forming process, the environmental pollution is low, the reinforcement cage is positioned by hanging a threaded steel bar on a steel protecting cylinder, and the reinforcement cage is convenient to prevent from falling or floating in the filling process.
Description
Technical Field
The invention relates to a cast-in-place pile, in particular to a stratum bored cast-in-place pile with a soft upper part and a hard lower part, and belongs to the technical field of building construction.
Background
In subway construction, the construction quality and the construction efficiency of the cast-in-situ bored pile of the enclosure structure are of vital importance, civilized construction is concerned by supervision and management departments such as broad masses, owners and governments in the current society with increasing economy and high-speed development, civilized construction management in the process of strengthening pile foundation construction is also a key point and a difficult point in subway construction, the application of the existing drilling machine cannot fundamentally solve the problems that holes are easy to collapse in upper soil and sand layers and difficult to drill into hard rock layers, and the construction noise is small, the pollution is large, and the civilized construction is not facilitated.
Disclosure of Invention
The invention aims to solve the problems and provide a stratum cast-in-situ bored pile with a soft upper part and a hard lower part.
The invention realizes the purpose through the following technical scheme: a stratum drilling cast-in-place pile with a soft upper part and a hard lower part comprises a foundation, a strongly weathered granite layer, coarse sand, silty clay, mucky soil, a pore-forming part, a sleeve, a drill rod, a drilling tooth, a down-the-hole hammer, a reinforcement cage, a vertical reinforcement, a connecting rib and a concrete filling mechanism; foundation, drilling rod and steel reinforcement cage constitute this bored concrete pile's major structure, the foundation includes strong morals and manners granite stratum, coarse sand, silty clay and mucky soil, strong morals and manners granite stratum is located the bottom, the coarse sand is located the upper strata on strong morals and manners granite stratum, silty clay is located the upper strata of coarse sand, mucky soil is located the upper strata of silty clay, it has the pore-forming to bore through the drilling rod on the foundation, be provided with the brill tooth on the drilling rod, and the lower extreme fixedly connected with down-the-hole hammer of drilling rod, the inside fixed sleeve pipe of having placed of pore-forming, sheathed tube internally mounted has the steel reinforcement cage, the steel reinforcement cage includes vertical reinforcing bar and connecting rib, carry out the rigid coupling through the connecting rib between the vertical reinforcing bar, the concrete filling has the concrete through concrete filling mechanism filling in the steel reinforcement cage.
The construction process of the dual-power multifunctional drilling machine comprises the following steps:
firstly, preparing a field, wherein field hardening of cm-thick plain concrete is required before entering the field or steel plates are paved in a mechanical operation area to ensure safe and stable mechanical operation;
step two, hole forming, namely, the drill rod, the sleeve and the down-the-hole hammer are combined to impact the hole forming, and the sleeve follows the protective wall;
step three, processing and hoisting the reinforcement cage, wherein two-point hoisting is adopted when the reinforcement cage is installed, the framework is always kept vertical in the lengthening and placing processes of the reinforcement cage, the uppermost end of the reinforcement cage is positioned, the length of a positioning rib is required to be calculated by the measured orifice elevation, and in order to prevent the reinforcement cage from falling off or floating in the pouring process, the reinforcement cage is positioned by hanging a threaded reinforcement on a steel casing;
pouring underwater concrete, and pouring the underwater concrete by adopting a vertical conduit method;
and fifthly, pipe drawing to form a pile, after the underwater concrete is poured, pipe drawing operation is carried out before the concrete is initially set, the pipe drawing operation can be implemented by a drilling machine or a crane, and the drawn sleeve can be recycled for repeated utilization. The falling height of the concrete is observed and detected immediately after pipe drawing, and the elevation of the pile top is ensured
Preferably, in order to facilitate continuous dumping of the drill rod, the drill rod has strong integral rigidity, large drilling force and high hole forming precision, can be used for strong drilling of various complex stratums and is suitable for construction of various construction methods, the drill rod and the outer sleeve are dually combined to drill holes, and the outer sleeve protects the wall.
Preferably, in order to reduce the pollution of mud to the environment, the geological collapse can be effectively reduced and avoided by utilizing casing following in the sand stratum, and the casing following retaining wall is utilized to replace the mud retaining wall in the drilling process of the drill pipe.
Preferably, in order to realize pore-forming quickly, the dust is less, the noise is low and the environmental pollution is low in the pore-forming process, and the drill bit of the drill rod and the outer casing pipe are combined to drill.
Preferably, in order to prevent the steel reinforcement cage from falling off the cage or floating the cage in the pouring process, the steel reinforcement cage is positioned by hanging the threaded steel bars on the steel casing.
The invention has the beneficial effects that: the stratum drilling bored concrete pile with the soft upper part and the hard lower part is reasonable in design, drilling rods and outer casing pipes are drilled in a double-combination mode, outer casing pipe retaining walls are formed, continuous dumping of the drilling rods is facilitated, the integral rigidity is high, the drilling force is large, the hole forming precision is high, strong drilling can be achieved for various complex strata, construction of multiple construction methods is applicable, the casing pipe following retaining walls are used for replacing slurry retaining walls in the drilling rod drilling process, pollution of slurry to the environment is facilitated to be reduced, geological collapse can be effectively reduced and avoided by using the casing pipe following in a sand stratum, drilling is achieved by the drill rod drill bits and the outer casing pipes in a double-combination mode, rapid implementation of hole forming is facilitated, dust is few in the hole forming process, noise is low, environmental pollution is low, threaded reinforcing steel bars are hung on steel casings in the positioning of the reinforcing steel cages, and cage falling or cage floating in.
Drawings
FIG. 1 is a schematic diagram of the construction structure of the multifunctional drilling machine of the invention;
FIG. 2 is a schematic view of a drill rod according to the present invention;
FIG. 3 is a schematic view of the reinforcement cage of the present invention;
FIG. 4 is a flow chart of the multifunctional drilling machine construction of the present invention.
In the figure: 1. foundation, 2, strongly weathered granite layer, 3, coarse sand, 4, silty clay, 5, mucky soil, 6, pore-forming, 7, sleeve, 8, drill rod, 9, drill teeth, 10, down-the-hole hammer, 11, reinforcement cage, 12, vertical reinforcement, 13, connecting rib and 14 and concrete filling mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Referring to fig. 1-4, a stratum drilling cast-in-place pile with a soft upper part and a hard lower part comprises a foundation 1, a strongly weathered granite layer 2, coarse sand 3, powdery clay 4, mucky soil 5, a formed hole 6, a sleeve 7, a drill rod 8, drill teeth 9, a down-the-hole hammer 10, a reinforcement cage 11, vertical reinforcements 12, connecting reinforcements 13 and a concrete filling mechanism 14; the foundation 1, the drill rod 8 and the reinforcement cage 11 form a main body structure of the cast-in-place pile, the foundation 1 comprises a strongly weathered granite layer 2, coarse sand 3, silty clay 4 and mucky soil 5, the strongly weathered granite layer 2 is positioned at the bottommost layer, the coarse sand 3 is positioned at the upper layer of the strongly weathered granite layer 2, the silty clay 4 is positioned on the upper layer of the coarse sand 3, the mucky soil 5 is positioned on the upper layer of the silty clay 4, a hole 6 is drilled on the foundation 1 through a drill rod 8, the drill rod 8 is provided with drill teeth 9, and the lower end of the drill rod 8 is fixedly connected with a down-the-hole hammer 10, a sleeve 7 is fixedly arranged inside the formed hole 6, a reinforcement cage 11 is arranged inside the casing 7, the reinforcement cage 11 comprises vertical reinforcements 12 and connecting reinforcements 13, vertical reinforcement 12 carries out the rigid coupling through splice bar 13 between, there is the concrete through the concrete filling mechanism 14 filling in the steel reinforcement cage 11.
The construction process of the dual-power multifunctional drilling machine comprises the following steps:
firstly, preparing a field, wherein the field is hardened to 20cm thick plain concrete or a steel plate is paved in a mechanical operation area before entering the field to ensure the safety and stability of mechanical operation;
step two, hole forming, namely, the drill rod 8, the sleeve 7 and the down-the-hole hammer 10 are combined to impact and form a hole, and meanwhile, the sleeve 7 follows the protective wall;
step three, processing and hoisting the reinforcement cage 11, wherein two-point hoisting is adopted when the reinforcement cage 11 is installed, the framework is always kept vertical in the lengthening and placing processes of the reinforcement cage 11, the uppermost end of the reinforcement cage 11 is positioned, the length of a positioning rib is calculated by the measured orifice elevation, and in order to prevent the reinforcement cage 11 from falling off or floating in the pouring process, the reinforcement cage 11 is positioned by hanging a threaded reinforcement on a steel casing;
pouring underwater concrete, and pouring the underwater concrete by adopting a vertical conduit method;
and fifthly, pipe drawing to form a pile, after the underwater concrete is poured, pipe drawing operation is carried out before the concrete is initially set, the pipe drawing operation can be implemented by a drilling machine or a crane, and the drawn sleeve 7 can be recycled for repeated utilization. And immediately observing and detecting the falling height of the concrete after pipe drawing to ensure the elevation of the pile top.
The drilling rod 8 and the two-piece combined drilling of outside sleeve pipe 7, the 7 dado of outside sleeve pipe are convenient for the continuous dumping of drilling rod 8, and whole rigidity is strong, drilling force is big, the pore-forming precision is high, can deal with the powerful drilling of various complicated stratum, is suitable for the construction of multiple worker's method, 8 drilling in-process of drilling rod utilize sleeve pipe 7 to follow up the dado and replace the mud dado, are convenient for reduce the pollution of mud to the environment, utilize sleeve pipe 7 to follow up in the sand bed stratum and can effectively reduce and avoid geological collapse, 8 drill bits of drilling rod and the two-piece combined drilling of outside sleeve pipe 7 are convenient for realize the pore-forming fast, and the dust is few, the noise is little at the pore-forming in-process, and environmental pollution is little, the location of steel reinforcement cage 11 adopts the twisted steel to hang on the steel pile casing, is convenient for prevent.
The working principle is as follows: when the stratum bored pile with soft top and hard bottom is used, firstly, site preparation is carried out, site hardening 20cm thick plain concrete is carried out before entering a field or a steel plate is laid in a mechanical operation area to ensure safe and stable mechanical operation, then, a drill rod 8, a sleeve 7 and a down-the-hole hammer 10 are combined to impact and form a hole, the sleeve 7 follows a protective wall, after the hole is formed, the processed reinforcement cage 11 is processed and hoisted, when the reinforcement cage 11 is installed, two-point hoisting is adopted, in the processes of lengthening and placing the reinforcement cage 11, a framework is always kept vertical, the uppermost end of the reinforcement cage 11 is positioned, the length of a positioning rib is required to be calculated by the measured orifice elevation, in order to prevent the reinforcement cage 11 from falling off or floating in the process of pouring, a threaded steel bar is adopted to suspend on the reinforcement cage 11, then, underwater concrete is poured into the reinforcement cage 11, and after the concrete pouring is finished, the pipe drawing operation is carried out before the initial setting of the concrete, the pipe drawing operation can be implemented by a drilling machine or a crane, and the drawn sleeve 7 can be recycled and reused. And immediately observing and detecting the falling height of the concrete after pipe drawing to ensure the elevation of the pile top.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a stratum drilling bored concrete pile that upper soft is hard down which characterized in that: the device comprises a foundation (1), a strongly weathered granite layer (2), coarse sand (3), powdery clay (4), mucky soil (5), a pore-forming hole (6), a sleeve (7), a drill rod (8), drill teeth (9), a down-the-hole hammer (10), a reinforcement cage (11), vertical reinforcements (12), connecting ribs (13) and a concrete filling mechanism (14);
the foundation (1), the drill rod (8) and the reinforcement cage (11) form a main body structure of the cast-in-place pile, the foundation (1) comprises a strongly weathered granite layer (2), coarse sand (3), silty clay (4) and mucky soil (5), the strongly weathered granite layer (2) is located at the bottommost layer, the coarse sand (3) is located at the upper layer of the strongly weathered granite layer (2), the silty clay (4) is located at the upper layer of the coarse sand (3), and the mucky soil (5) is located at the upper layer of the silty clay (4);
be bored through drilling rod (8) on ground (1) and have pore-forming (6), be provided with on drilling rod (8) and bore tooth (9), and lower extreme fixedly connected with down-the-hole hammer (10) of drilling rod (8), sleeve pipe (7) have been placed to the inside fixed of pore-forming (6), the internally mounted of sleeve pipe (7) has steel reinforcement cage (11), steel reinforcement cage (11) include vertical reinforcing bar (12) and splice bar (13), carry out the rigid coupling through splice bar (13) between vertical reinforcing bar (12), there is the concrete through concrete filling mechanism (14) filling in steel reinforcement cage (11).
2. The bored pile for the stratum with the soft upper part and the hard lower part as claimed in claim 1, wherein: the drill rod (8) and the outer side sleeve (7) are dually combined to drill a hole, and the outer side sleeve (7) protects the wall.
3. The bored pile for the stratum with the soft upper part and the hard lower part as claimed in claim 1, wherein: and the casing (7) is used for following the retaining wall to replace the slurry retaining wall in the drilling process of the drill rod (8).
4. The bored pile for the stratum with the soft upper part and the hard lower part as claimed in claim 1, wherein: the drill bit of the drill rod (8) and the outer casing (7) are combined in a double-combined mode to drill.
5. The bored pile for the stratum with the soft upper part and the hard lower part as claimed in claim 1, wherein: and the steel reinforcement cage (11) is positioned and suspended on the steel casing by adopting a threaded steel bar.
6. The bored pile for the stratum with the soft upper part and the hard lower part as claimed in claim 1, wherein: the construction process of the dual-power multifunctional drilling machine comprises the following steps:
firstly, preparing a field, wherein the field needs to be hardened before entering the field or a steel plate needs to be laid in a mechanical operation area to ensure the safety and stability of mechanical operation;
step two, hole forming is carried out, wherein a drill rod (8), a sleeve (7) and a down-the-hole hammer (10) are combined to impact and form a hole, and the sleeve (7) follows the protective wall;
step three, processing and hoisting the reinforcement cage (11), wherein two-point hoisting is adopted when the reinforcement cage (11) is installed, the framework is always kept vertical in the lengthening and placing processes of the reinforcement cage (11), the length of a positioning rib is required to be calculated according to the measured orifice elevation for positioning the uppermost end of the reinforcement cage (11), and in order to prevent the reinforcement cage (11) from falling off or floating in the pouring process, a threaded reinforcement is adopted for positioning the reinforcement cage (11) and is hung on a steel casing;
pouring underwater concrete, and pouring the underwater concrete by adopting a vertical conduit method;
fifthly, pipe drawing and pile forming are carried out, after the underwater concrete is poured, pipe drawing operation is carried out before the concrete is initially set, the pipe drawing operation can be implemented through a drilling machine or a crane, and the drawn sleeve (7) can be recycled and repeatedly used; and immediately observing and detecting the falling height of the concrete after pipe drawing to ensure the elevation of the pile top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011496969.4A CN112575770A (en) | 2020-12-17 | 2020-12-17 | Stratum drilling cast-in-place pile with soft upper part and hard lower part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011496969.4A CN112575770A (en) | 2020-12-17 | 2020-12-17 | Stratum drilling cast-in-place pile with soft upper part and hard lower part |
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| Publication Number | Publication Date |
|---|---|
| CN112575770A true CN112575770A (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011496969.4A Pending CN112575770A (en) | 2020-12-17 | 2020-12-17 | Stratum drilling cast-in-place pile with soft upper part and hard lower part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585254A (en) * | 2021-07-28 | 2021-11-02 | 安徽水安建设集团股份有限公司 | Construction method of cast-in-situ bored pile with upper soft and lower hard inclined boundary stratum |
-
2020
- 2020-12-17 CN CN202011496969.4A patent/CN112575770A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585254A (en) * | 2021-07-28 | 2021-11-02 | 安徽水安建设集团股份有限公司 | Construction method of cast-in-situ bored pile with upper soft and lower hard inclined boundary stratum |
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