CN113309119A - Construction method for constructing inclined pile by mud retaining wall - Google Patents
Construction method for constructing inclined pile by mud retaining wall Download PDFInfo
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- CN113309119A CN113309119A CN202110761246.0A CN202110761246A CN113309119A CN 113309119 A CN113309119 A CN 113309119A CN 202110761246 A CN202110761246 A CN 202110761246A CN 113309119 A CN113309119 A CN 113309119A
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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
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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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a construction method for constructing an inclined pile by using a slurry retaining wall. The construction method for constructing the inclined pile by using the slurry retaining wall comprises the following steps of S1, site leveling and pile position measuring; s2, embedding a pile casing and rechecking the angle; s3, taking earth and drilling, wherein a drilling machine drills a pile hole, and simultaneously slurry is pumped into the pile hole; s4, cleaning and pore-forming inspection, wherein a pore-cleaning drill is used for cleaning pores for one time, and pore-forming quality inspection is carried out; s5, manufacturing a reinforcement cage, welding stirrups on a main reinforcement, welding a positioning support rib on the main reinforcement, wherein the positioning support rib is positioned on the outer side of the main reinforcement, the positioning support rib is annularly distributed according to a certain interval, then sleeving a roller on a transverse reinforcement, welding the transverse reinforcement on the main reinforcement, and positioning support rib is positioned below the roller when the main reinforcement is horizontally placed; s6, hoisting the reinforcement cage into the hole; s7, installing a guide pipe and cleaning holes for the second time; s8, pouring concrete; and S9, pulling out the steel casing. The construction method for constructing the inclined pile by using the slurry retaining wall can effectively protect the pile hole and avoid the collapse of the pile hole as much as possible.
Description
Technical Field
The invention relates to the technical field of inclined pile construction, in particular to a construction method for constructing an inclined pile by using a mud guard wall.
Background
In the excavation supporting engineering, the inclined pile has better pile body bending moment and better displacement control effect than the straight pile, and can meet the excavation supporting-free supporting of greater depth. The inclined cast-in-place pile can realize construction with larger pile length and pile diameter, can further expand the application range of the inclined pile, and particularly can better realize green and economic construction by adopting the support-free support of the inclined cast-in-place pile under the condition that support cannot be adopted for some integrated assembly type underground structures.
According to the existing construction method, the stability of the hole wall is poor due to poor slurry performance when a drilling machine rotates the hole, and the possibility of pile hole collapse is caused.
Disclosure of Invention
The invention aims to provide a construction method for constructing an inclined pile by using a slurry retaining wall, which is not easy to damage a hole wall.
In order to solve the above problems, the present invention provides a method for constructing a sloped pile by using a slurry retaining wall, wherein the method comprises the following steps:
s1, leveling the ground and compacting, then placing the drilling machine at a construction position, and positioning and setting the mast of the drilling machine;
s2, embedding a pile casing and rechecking the angle, obliquely pressing the pile casing into a soil body for angle and positioning control, wherein the depth of the pile casing pressed into the soil body is 2-12m, and checking whether the center of the pile coincides with the center of a drill bit after the pile casing is embedded;
s3, taking earth and drilling, wherein a drilling machine drills a pile hole, and simultaneously slurry is pumped into the pile hole;
s4, cleaning and pore-forming inspection, wherein a pore-cleaning drill is used for cleaning pores for one time, and pore-forming quality inspection is carried out;
s5, manufacturing a reinforcement cage, welding stirrups on a main reinforcement, welding a positioning support rib on the main reinforcement, wherein the positioning support rib is positioned on the outer side of the main reinforcement, the positioning support rib is annularly distributed according to a certain interval, then sleeving a roller on a transverse reinforcement, welding the transverse reinforcement on the main reinforcement, and positioning support rib is positioned below the roller when the main reinforcement is horizontally placed;
s6, hoisting the reinforcement cage into the hole;
s7, installing a guide pipe and cleaning holes for the second time;
s8, pouring concrete;
and S9, pulling out the steel casing.
Further, in step S3, the slurry contains water: bentonite: cmc: soda ash, wherein, water: bentonite: cmc: the weight ratio of the calcined soda is 100: 10: 0.3: 0.4.
further, the proportioned slurry is stirred at a high speed for not less than 4min, and is kept stand for one day after stirring.
Further, the drilling machine adopts a rotary drilling machine to drill, a drilling bucket of the rotary drilling machine adopts a 1.8m bailing drilling bucket, and a drill rod of the rotary drilling machine adopts a mechanical lock drill rod.
Furthermore, a drill bit of the rotary drilling rig is provided with a circular bulge.
Furthermore, the length of the drill bit is 2.8-3.0 m.
Further, in step S5, the positioning ribs are also spaced apart from each other along the length direction 2m of the main rib.
Further, in step S5, the transverse reinforcing bars have the same diameter as the main reinforcing bars and the length of 500 mm.
Further, in step S5, a steel pipe with a pipe diameter of 48mm and a wall thickness of 3mm and a length of 450mm is used as the roller.
The construction method for constructing the inclined pile by using the slurry retaining wall adopts a new reinforcement cage manufacturing mode, so that the reinforcement cage is provided with the positioning support rib and the roller, the positioning support rib can prevent the main rib from contacting with the wall of the hole, and the pile hole can be protected from being damaged by a cage body; and meanwhile, the roller can ensure that the guide pipe is smoothly put into the hole, so that the phenomenon that the guide pipe is clamped and hung with the cage body is avoided.
Drawings
Fig. 1 is a flow chart of a construction method of a mud dado for constructing a slant pile according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural view of the construction of the drilling machine.
Fig. 3 is a schematic structural view of a reinforcement cage.
Fig. 4 is a structural schematic diagram of the reinforcement cage in the pile hole.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the preferred embodiment of the method for constructing the inclined pile by using the slurry wall protection of the invention comprises the following steps:
and S1, leveling the field and measuring the pile position. Firstly, the ground 4 is leveled and compacted, then the drilling machine 1 is placed at a construction position, and the mast of the drilling machine 1 is positioned. The drilling machine 1 adopts a rotary drilling machine 1, the type of the drilling machine 1 is selected according to the soil taking requirement, and the drilling machine 1 with a larger type is selected in order to accelerate the drilling hole forming speed. A1.8 m sand bailing drilling bucket is adopted by a drilling bucket of the rotary drilling rig 1 so as to reduce disturbance of the drilling rig 1 to the hole wall. The drill rod of the rotary drilling rig 1 is a mechanical locking drill rod, and is buckled with each other through concave key strips on the drill rod to form rigid connection, so that shaft pressure can be transmitted more effectively. The drill bit 11 of the rotary drilling rig 1 is provided with the circular protrusion 111, so that the drill bit 11 can be supported on the hole wall when the hole is drilled and the soil is taken, a fulcrum is formed, the problem that the drill bit 11 of the drill rod bends downwards during the construction of the inclined pile is solved, and the disturbance of the drill bit 11 to the hole wall is reduced. The length of the drill bit 11 is 2.8-3.0 m, so that the hole forming bending caused by the dead weight of the drill bit 11 during the construction of the inclined support pile is further reduced, and the problem that the pile forming central line is curved is avoided.
S2, embedding the pile casing 3 and checking the angle. And (3) obliquely pressing the pile casing 3 into the soil body for angle and positioning control, wherein the pressing depth of the pile casing 3 into the soil body is 2-12m, and whether the center of the pile coincides with the center of the drill bit 11 after the pile casing 3 is buried is checked.
And S3, taking earth and drilling. The drilling machine 1 drills a pile hole while pumping mud 2 into the pile hole. Before the soil taking construction, the hardened ground 4 can be constructed firstly, so that the equipment control is more accurate, the deviation caused by the deformation of the ground 4 is not easy to generate, and the angle control is facilitated. Wherein mud 2 comprises water: bentonite: cmc: soda ash, wherein, water: bentonite: cmc: the weight ratio of the calcined soda is 100: 10: 0.3: 0.4, the specific gravity of the slurry 2 prepared by the proportion is 1.20-1.25, the viscosity is 25-30s, the sand content is less than or equal to 4 percent, and the mud skin can be formed more effectively to achieve the wall protection effect. Stirring the proportioned slurry at a high speed for 2 min to 4min, and standing for one day after stirring; the parameters of the slurry 2 after high-speed stirring are better, and the function of the slurry 2 can be better exerted after the slurry is fully swelled. For different formations, a certain proportion of barite powder can be doped into the mud 2 to enhance the wall protection capability. If the key indexes such as viscosity, specific gravity and the like of the slurry 2 need to be further increased, the OCMA bentonite with higher viscosity than the common bentonite is adopted for slurry making, and when the viscosity is less than 25s, the soda ash with the weight ratio of 6 per thousand is added, so that the filtration loss of the slurry 2 can be further reduced, the viscosity of the slurry 2 is increased, and the formation of the mud skin of the hole wall and the strengthening of the wall protection effect are facilitated.
And S4, cleaning and checking the formed holes. And (4) carrying out primary hole cleaning by using the hole cleaning drill bit 11, and checking the hole forming quality.
And S5, manufacturing a reinforcement cage. Weld stirrup 52 on the main muscle 51, then bend into the reinforcing bar the arc and make the location and hold in the palm muscle 53 to hold in the palm muscle 53 welding to the main muscle 51 with the location on, the location holds in the palm muscle 53 and is located the main muscle 51 outside, and every section leans on pore wall one side welding at the steel reinforcement cage to have 4 location to hold in the palm muscle 53, the location holds in the palm muscle 53 and will be the annular according to a determining deviation and distribute, and the location holds in the palm muscle 53 and still follows main muscle 51 length direction 2m interval distribution. Then sleeving the transverse reinforcing steel bars 54 with rollers 55, welding the transverse reinforcing steel bars 54 on the main reinforcing steel bars 51, and enabling the rollers 55 to rotate on the transverse reinforcing steel bars 54; the diameter of the transverse reinforcing steel bar 54 is equal to that of the main reinforcing steel bar 51, the length of the transverse reinforcing steel bar is 500mm, the roller 55 is a steel pipe with the pipe diameter of 48mm and the wall thickness of 3mm, and the length of the roller is 450 mm. The positioning key 53 is located below the roller 55 when the main rib 51 is horizontally placed. In other embodiments, the positioning ribs 53 may be rollers, and the rotating shafts of the rollers are welded to the main ribs 51.
S6, hoisting the reinforcement cage into the hole;
s7, installing a guide pipe 6 and cleaning holes for the second time;
s8, pouring concrete;
and S9, pulling out the steel casing 3. The steps S2, S4, S6, S7, S8 and S9 are conventional operation modes, and therefore are not described herein again.
The steel reinforcement cage manufactured by the construction method for constructing the inclined pile by using the mud 2 wall protection can ensure that the main reinforcement 51 and the stirrup 52 have a certain distance from the wall of the hole, the positioning support rib 53 can avoid the main reinforcement 51 from contacting the wall of the hole, the pile hole can be protected from being damaged by the main reinforcement 51, and the positioning support rib 53 can facilitate the steel reinforcement cage to be obliquely lowered along the wall of the hole. And meanwhile, the roller 55 can ensure that the guide pipe 6 can be smoothly put into the hole, so that the phenomenon that the guide pipe 6 is clamped and hung with the cage body is avoided. And the stability of the hole wall of the inclined pile is controlled by controlling the parameters of the slurry 2.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields, and are within the scope of the present invention.
Claims (9)
1. A construction method for constructing an inclined pile by using a slurry retaining wall is characterized by comprising the following steps: the method comprises the following steps:
s1, leveling the ground and compacting, then placing the drilling machine at a construction position, and positioning and setting the mast of the drilling machine;
s2, embedding a pile casing and rechecking the angle, obliquely pressing the pile casing into a soil body for angle and positioning control, wherein the depth of the pile casing pressed into the soil body is 2-12m, and checking whether the center of the pile coincides with the center of a drill bit after the pile casing is embedded;
s3, taking earth and drilling, wherein a drilling machine drills a pile hole, and simultaneously slurry is pumped into the pile hole;
s4, cleaning and pore-forming inspection, wherein a pore-cleaning drill is used for cleaning pores for one time, and pore-forming quality inspection is carried out;
s5, manufacturing a reinforcement cage, welding stirrups on a main reinforcement, welding a positioning support rib on the main reinforcement, wherein the positioning support rib is positioned on the outer side of the main reinforcement, the positioning support rib is annularly distributed according to a certain interval, then sleeving a roller on a transverse reinforcement, welding the transverse reinforcement on the main reinforcement, and positioning support rib is positioned below the roller when the main reinforcement is horizontally placed;
s6, hoisting the reinforcement cage into the hole;
s7, installing a guide pipe and cleaning holes for the second time;
s8, pouring concrete;
and S9, pulling out the steel casing.
2. The method for constructing the inclined pile by using the mud retaining wall as claimed in claim 1, wherein: in step S3, the slurry contains water: bentonite: cmc: soda ash, wherein, water: bentonite: cmc: the weight ratio of the calcined soda is 100: 10: 0.3: 0.4.
3. the method for constructing the inclined pile by using the mud retaining wall as claimed in claim 2, wherein: and (4) stirring the proportioned slurry at a high speed for not less than 4min, and standing for one day after stirring.
4. The method for constructing the inclined pile by using the mud retaining wall as claimed in claim 1, wherein: the drilling machine adopts a rotary drilling machine to drill, a drilling bucket of the rotary drilling machine adopts a 1.8m bailing drilling bucket, and a drill rod of the rotary drilling machine adopts a mechanical lock drill rod.
5. The method for constructing the inclined pile by using the mud retaining wall as claimed in claim 4, wherein the method comprises the following steps: and a drill bit of the rotary drilling rig is provided with a circular bulge.
6. The method for constructing the inclined pile by using the mud retaining wall as claimed in claim 5, wherein: the length of the drill bit is 2.8-3.0 m.
7. The method for constructing the inclined pile by using the mud retaining wall as claimed in claim 1, wherein: in step S5, the positioning ribs are also distributed at intervals along the length direction 2m of the main rib.
8. The method for constructing the inclined pile by using the mud retaining wall as claimed in claim 1, wherein: in step S5, the transverse reinforcing bars have the same diameter as the main bars and the length of 500 mm.
9. The method for constructing the inclined pile by using the mud retaining wall as claimed in claim 1, wherein: in step S5, the roller is a steel tube with a diameter of 48mm and a wall thickness of 3mm and a length of 450 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110761246.0A CN113309119A (en) | 2021-07-06 | 2021-07-06 | Construction method for constructing inclined pile by mud retaining wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110761246.0A CN113309119A (en) | 2021-07-06 | 2021-07-06 | Construction method for constructing inclined pile by mud retaining wall |
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| CN202110761246.0A Pending CN113309119A (en) | 2021-07-06 | 2021-07-06 | Construction method for constructing inclined pile by mud retaining wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059560A (en) * | 2021-12-22 | 2022-02-18 | 瑞洲建设集团有限公司 | Inclined pile construction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119189A (en) * | 2020-01-09 | 2020-05-08 | 中铁十局集团第五工程有限公司 | Pile foundation reinforcement cage positioning device and pile foundation reinforcement cage construction method |
| CN112538858A (en) * | 2020-12-02 | 2021-03-23 | 中建三局集团有限公司 | Inclined support pile construction platform structure based on rotary drilling rig and construction method |
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2021
- 2021-07-06 CN CN202110761246.0A patent/CN113309119A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119189A (en) * | 2020-01-09 | 2020-05-08 | 中铁十局集团第五工程有限公司 | Pile foundation reinforcement cage positioning device and pile foundation reinforcement cage construction method |
| CN112538858A (en) * | 2020-12-02 | 2021-03-23 | 中建三局集团有限公司 | Inclined support pile construction platform structure based on rotary drilling rig and construction method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059560A (en) * | 2021-12-22 | 2022-02-18 | 瑞洲建设集团有限公司 | Inclined pile construction method |
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Application publication date: 20210827 |