CN110565658A - Double-row bottom-expanding long-short combined anti-slide pile for slope support - Google Patents
Double-row bottom-expanding long-short combined anti-slide pile for slope support Download PDFInfo
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- CN110565658A CN110565658A CN201910800832.4A CN201910800832A CN110565658A CN 110565658 A CN110565658 A CN 110565658A CN 201910800832 A CN201910800832 A CN 201910800832A CN 110565658 A CN110565658 A CN 110565658A
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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
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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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
- E02D5/24—Prefabricated piles
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Abstract
The invention discloses a double-row bottom-expanding long and short combined slide-resistant pile for slope support. The combined anti-slide pile comprises front row expanded-base anti-slide piles, rear row expanded-base anti-slide piles, pile top crown beams and connecting beams, wherein the front row expanded-base anti-slide piles and the rear row expanded-base anti-slide piles are all expanded-base piles, the pile length of the front row expanded-base anti-slide piles is smaller than that of the rear row anti-slide piles, the landslide thrust borne by the combined anti-slide piles is increased through the bottom expanding effect of the front row anti-slide piles and the rear row anti-slide piles, the stress and deformation between the front row piles and the rear row piles are adjusted, the front row piles and the rear row piles can fully exert the anti-slide capability, meanwhile, the arrangement form that the anti-slide piles on two sides of a landslide body can better exert the function, and the landslide treatment cost is reduced.
Description
Technical Field
The invention relates to an anti-slide pile, in particular to a double-row expanded-base long-short combined anti-slide pile for slope support.
Background
At present, geological disasters frequently occur, the slide-resistant piles are one of main support types for treating landslide disasters, however, high and large landslides are more and more in practical engineering, and single-row slide-resistant piles often cannot provide enough sliding resistance. The double-row anti-slide pile has the advantages of larger lateral rigidity, strong anti-slide capability and the like, thereby being applied to a plurality of landslide control projects. In the traditional double row anti-slide pile design, the landslide thrust borne by the front row anti-slide pile and the rear row anti-slide pile is generally considered to be consistent. However, research shows that under the condition of certain landslide thrust, the difference between the internal force and the deformation between the front row pile and the rear row pile is large, most of the landslide thrust is borne by the rear row pile, and the front row pile cannot fully exert the anti-skidding capacity. Therefore, the double-row anti-slide pile capable of fully exerting the anti-slide capability of the front-row anti-slide pile has important engineering and economic values.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a double-row expanded-base long-and-short combined anti-slide pile which can fully exert the anti-slide capability of front and rear rows of anti-slide piles and avoid the internal force non-uniformity of the front and rear rows of piles.
The technical scheme is as follows: the invention provides a double-row expanded-bottom long-short combined slide-resistant pile for slope support, which comprises a front row of expanded-bottom slide-resistant piles, a rear row of expanded-bottom slide-resistant piles, a pile top crown beam and a connecting beam, wherein the front row of expanded-bottom slide-resistant piles are arranged on the front row of expanded-bottom slide-resistant piles; the rear row of bottom-expanded anti-slide piles are positioned at the rear edge of the landslide body, the front row of bottom-expanded anti-slide piles and the rear row of bottom-expanded anti-slide piles are fixed through a plurality of connecting beams and are arranged along the downslide direction of the landslide body, and the surfaces of the connecting beams form a horizontal plane; the front row of expanded-base slide-resistant piles and the rear row of expanded-base slide-resistant piles are respectively composed of a plurality of expanded-base slide-resistant piles, and the expanded-base slide-resistant piles are fixedly connected through pile top crown beams; the pile top crown beam is vertically connected with the connecting beam.
The front row of club-footed anti-slide piles and the rear row of club-footed anti-slide piles refer to the enlargement of the bottom ends of the anti-slide piles, which is beneficial to the stable inlaying and improves the horizontal anti-slide bearing capacity.
The length of the front row of club-footed anti-slide piles is less than that of the rear row of club-footed anti-slide piles.
By reducing the pile length of the front row piles, the internal force and deformation of the front row piles and the rear row piles are effectively adjusted, so that the anti-skidding capacity of the front row piles and the rear row piles can be fully exerted, the material consumption is reduced, and the landslide control cost is reduced.
further, when the front row of club-footed anti-slide piles and the rear row of club-footed anti-slide piles are manually dug piles, the diameter of the pile body is not less than 1.2m, and when the front row of club-footed anti-slide piles and the rear row of club-footed anti-slide piles are drilled piles, the diameter of the pile body is not less than 0.8 m.
Furthermore, the embedded sections of the front row of club-footed anti-slide piles and the rear row of club-footed anti-slide piles are arranged in the slide bed; for a soil layer or a weak rock stratum, the length of the embedded section of the front row of bottom-expanded slide-resistant piles is 1/5-1/4 of the total pile length, and the length of the embedded section of the rear row of bottom-expanded slide-resistant piles is 1/3-1/2 of the total pile length; for a complete or hard rock stratum, the length of the embedded section of the front row of bottom-expanded slide-resistant piles is 1/6-1/5 of the total pile length, and the length of the embedded section of the rear row of bottom-expanded slide-resistant piles is 1/4-1/3 of the total pile length. The front row of club-footed anti-slide piles and the rear row of club-footed anti-slide piles should ensure enough length of the embedded section, so that the anti-slide piles transmit the gliding force of the slope body to the rock and soil mass around the embedded section at the lower part of the club-footed piles, and the lateral bearing force of the rock and soil mass of the embedded section is relied on to resist the gliding force of the slope body, thereby ensuring the balance and stability of the slope body.
Furthermore, the front row of club-footed anti-slide piles and the rear row of club-footed anti-slide piles are tightly distributed at the positions close to the central line of the landslide and loose at the two sides; the closely distributed pile spacing is 2-3 times of pile body diameter, and the loosely distributed pile spacing is 3-4 times of pile body diameter. The landslide thrust near the center line of the landslide is larger, and the landslide thrust on the two sides is relatively smaller, so the anti-skidding pile has the anti-skidding function as far as possible by adopting the mode that the center line of the landslide is close and the two sides are sparse. For reducing the mutual influence between the adjacent stake of one row of when being under construction, 2 times pile body diameters are got to minimum closely distributed pile interval, and 3 times pile body diameters are got to minimum loose distributed pile interval, and for preventing the landslide from the roll-off between two stakes, 3 times pile body diameters are got to the biggest closely distributed pile interval simultaneously, and 4 times pile body diameters are got to the biggest loose distributed pile interval.
Further, the distance between the front row of club-footed slide-resistant piles and the rear row of club-footed slide-resistant piles is 2-4 times of the diameter of the pile body. When the row spacing of the front row and the rear row of the bottom-expanding anti-slide piles is too small, the front row and the rear row of the bottom-expanding anti-slide piles can mutually influence and are unreasonably stressed, the rigid frame effect formed by the front row and the rear row of the bottom-expanding anti-slide piles can be weakened when the row spacing is too large, and the reasonable range of the row spacing is 2-4 times of the diameter of a pile.
Furthermore, the bottom expanding ends of the front row of bottom expanding slide-resistant piles and the rear row of bottom expanding slide-resistant piles are both circular, and the ratio of the diameter of the bottom expanding end to the diameter of the pile body is not more than 3. When the numerical value is not more than 3, the safety and the difficulty of the pedestal pile construction and the stress uniformity of the pedestal section are good.
Furthermore, the rise of the bottom expanding ends of the front row of bottom expanding slide-resistant piles and the rear row of bottom expanding slide-resistant piles is 0.3-0.35 times of the diameter of the bottom expanding ends. When the rise of the bottom expanding section is within the range, the stress distribution of the pile end of the bottom expanding pile is uniform, the stress is reasonable, and the property of the bearing capacity of the pile end is better.
Furthermore, the slope of the expanded bottom end side faces of the front row of expanded bottom slide-resistant piles and the rear row of expanded bottom slide-resistant piles is not more than 1/3 of the material quality of silt or cohesive soil; the material of the weathered rock or pebble layer is not more than 1/2. The specific numerical value of the slope of the side surface of the bottom expanding section is determined according to the actual hole forming and the self-supporting condition of the rock-soil body on the side surface of the bottom expanding section.
Further, the width of the pile top crown beam is larger than the diameter of the pile body, and the height of the pile top crown beam is 0.8 times of the diameter of the pile body. The width of the pile top crown beam is slightly larger than the diameter of the expanded-base pile, and the longitudinal steel bar inserted into the expanded-base pile is arranged in the steel bar cage of the pile top crown beam so as to ensure that the pile top crown beam and the expanded-base pile are firmly pulled and connected.
Furthermore, the width of the connecting beam is larger than the diameter of the pile body, the height of the connecting beam is not smaller than 0.8 time of the diameter of the pile body, and the ratio of the height of the connecting beam to the distance between the front row of bottom-expanded slide-resistant piles and the rear row of bottom-expanded slide-resistant piles is 1/6-1/3. The displacement of the top of the combined slide-resistant pile is reduced along with the increase of the height of the connecting beam, but when the height of the connecting beam is larger than the diameter of the pile body and then the height of the connecting beam is increased, the displacement of the pile top of the combined slide-resistant pile is basically unchanged, so that the height of the connecting beam is not less than 0.8 time of the diameter of the pile body, and the ratio of the height of the connecting beam to the distance between the front row of bottom-expanded slide-resistant piles and the rear row of bottom-expanded slide-resistant piles is 1/6-1/3.
Has the advantages that: the invention improves the anti-sliding force of the double-row piles to a greater extent by arranging the expanded bottom ends of the front row piles and the rear row piles, simultaneously leads the stress and the deformation of the front row piles and the rear row piles to be more uniform by reducing the pile length of the front row piles, reduces the material consumption and greatly reduces the side slope treatment cost. Compared with a single-row anti-slide pile, the anti-slide pile has larger lateral rigidity and can resist larger landslide thrust.
Drawings
FIG. 1 is a schematic view of the burying of the present invention in landslide control;
FIG. 2 is a schematic view of the overall structure of the present invention;
Figure 3 is a top view of the slide pile according to the invention.
Detailed Description
in the following examples, 6 is a sliding surface, which is an interface between the sliding mass 5 and the sliding bed 7, and 8 is a center line of the sliding mass.
d is the diameter of the pile body of the club-footed pile; d is the diameter of the expanded bottom end; h iscIs the rise of the bottom expanding end; b/ha is the slope of the flank of the enlarged base.
Example 1
As shown in fig. 1-3, the embodiment is a double-row expanded-bottom long-short combined slide-resistant pile for slope support, and the main components include a front row of expanded-bottom slide-resistant piles 1, a rear row of expanded-bottom slide-resistant piles 2, a pile top crown beam 3 and a connecting beam 4; the rear row of bottom-expanded slide-resistant piles 2 are positioned at the rear edge of the slide mass 5, the front row of bottom-expanded slide-resistant piles 1 and the rear row of bottom-expanded slide-resistant piles 2 are fixed through 9 connecting beams 4 and are arranged along the downward sliding direction of the slide mass 5, and the surfaces of the 9 connecting beams 4 form a horizontal plane; the front row of expanded-base slide-resistant piles 1 and the rear row of expanded-base slide-resistant piles 2 are respectively composed of 9 expanded-base slide-resistant piles, and the expanded-base slide-resistant piles are fixedly connected with each other through pile top crown beams 3 which are sleeved (three characters are recommended to be removed); the pile top crown beam 3 is vertically connected with the connecting beam 4; the length of the front row of club-footed anti-slide piles 1 is less than that of the rear row of club-footed anti-slide piles 2. When the front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are manually drilled piles, the diameter of the pile body is 1.2m, and when the pile bodies are drilled piles, the diameter of the pile body is 0.8 m. The embedded sections of the front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are arranged on the slide bed 7; for a soil layer or a weak rock stratum, the length of the embedded section of the front row of bottom-expanded slide-resistant piles 1 is 1/5 of the total pile length, and the length of the embedded section of the rear row of bottom-expanded slide-resistant piles 2 is 1/3 of the total pile length; for complete or hard rock strata, the length of the embedded section of the front row of the bottom-expanded slide-resistant piles 1 is 1/6 of the total pile length, and the length of the embedded section of the rear row of the bottom-expanded slide-resistant piles 2 is 1/4 of the total pile length. The front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are tightly distributed at the positions close to the central line of the landslide and loose at the two sides; the distance between the closely distributed piles is 2 times of the diameter of the pile body, and the distance between the loosely distributed piles is 3 times of the diameter of the pile body. The distance between the front row of club-footed slide-resistant piles 1 and the rear row of club-footed slide-resistant piles 2 is 2 times of the diameter of the pile body. The bottom expanding ends of the front row of bottom expanding slide-resistant piles 1 and the rear row of bottom expanding slide-resistant piles 2 are both circular, and the ratio of the diameter of the bottom expanding end to the diameter of the pile body is not more than 3. The rise of the expanded bottom ends of the front row of expanded-bottom slide-resistant piles 1 and the rear row of expanded-bottom slide-resistant piles 2 is 0.3 time of the diameter of the expanded bottom ends. The slope of the expanded bottom end side faces of the front row of expanded bottom slide-resistant piles 1 and the rear row of expanded bottom slide-resistant piles 2 is not more than 1/3 of the material quality of silt or cohesive soil; the material of the weathered rock or pebble layer is not more than 1/2. The width of the pile top crown beam 3 is larger than the diameter of the pile body, and the height is 0.8 d. The width of the connecting beam 4 is larger than the diameter of the pile body, the height of the connecting beam 4 is not smaller than 0.8d, and the distance ratio of the connecting beam to the front row of bottom-expanded slide piles 1 to the rear row of bottom-expanded slide piles 2 is 1/6.
Example 2
As shown in fig. 1-3, the embodiment is a double-row expanded-bottom long-short combined slide-resistant pile for slope support, and the main components include a front row of expanded-bottom slide-resistant piles 1, a rear row of expanded-bottom slide-resistant piles 2, a pile top crown beam 3 and a connecting beam 4; the rear row of bottom-expanded slide-resistant piles 2 are positioned at the rear edge of the slide mass 5, the front row of bottom-expanded slide-resistant piles 1 and the rear row of bottom-expanded slide-resistant piles 2 are fixed through 9 connecting beams 4 and are arranged along the downward sliding direction of the slide mass 5, and the surfaces of the 9 connecting beams 4 form a horizontal plane; the front row of expanded-base slide-resistant piles 1 and the rear row of expanded-base slide-resistant piles 2 are respectively composed of 9 expanded-base slide-resistant piles, and the expanded-base slide-resistant piles are fixedly connected with each other through pile top crown beams 3 which are sleeved (three characters are recommended to be removed); the pile top crown beam 3 is vertically connected with the connecting beam 4; the length of the front row of club-footed anti-slide piles 1 is less than that of the rear row of club-footed anti-slide piles 2. When the front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are manually drilled piles, the diameter of the pile body is 1.4m, and when the pile bodies are drilled piles, the diameter of the pile body is 0.9 m. The embedded sections of the front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are arranged on the slide bed 7; for a soil layer or a weak rock stratum, the length of the embedded section of the front row of bottom-expanded slide-resistant piles 1 is 1/4 of the total pile length, and the length of the embedded section of the rear row of bottom-expanded slide-resistant piles 2 is 1/2 of the total pile length; for complete or hard rock strata, the length of the embedded section of the front row of the bottom-expanded slide-resistant piles 1 is 1/5 of the total pile length, and the length of the embedded section of the rear row of the bottom-expanded slide-resistant piles 2 is 1/3 of the total pile length. The front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are tightly distributed at the positions close to the central line of the landslide and loose at the two sides; the distance between the closely distributed piles is 3 times of the diameter of the pile body, and the distance between the loosely distributed piles is 4 times of the diameter of the pile body. The distance between the front row of club-footed slide-resistant piles 1 and the rear row of club-footed slide-resistant piles 2 is 4 times of the diameter of the pile body. The bottom expanding ends of the front row of bottom expanding anti-slide piles 1 and the rear row of bottom expanding anti-slide piles 2 are both circular, and the ratio of the diameter of the bottom expanding end to the diameter of the pile body is 2. The rise of the expanded bottom ends of the front row of expanded-bottom slide-resistant piles 1 and the rear row of expanded-bottom slide-resistant piles 2 is 0.35 times of the diameter of the expanded bottom ends. The slope of the expanded bottom end side faces of the front row of expanded bottom slide-resistant piles 1 and the rear row of expanded bottom slide-resistant piles 2 is not more than 1/3 of the material quality of silt or cohesive soil; the material of the weathered rock or pebble layer is not more than 1/2. The width of the pile top crown beam 3 is larger than the diameter of the pile body, and the height is 0.8 d. The width of the connecting beam 4 is larger than the diameter of the pile body, the height is not smaller than 0.8d, and the ratio of the height of the connecting beam 4 to the distance between the front row of club-footed slide-resistant piles 1 and the rear row of club-footed slide-resistant piles 2 is 1/3.
Example 3
As shown in fig. 1-3, the embodiment is a double-row expanded-bottom long-short combined slide-resistant pile for slope support, and the main components include a front row of expanded-bottom slide-resistant piles 1, a rear row of expanded-bottom slide-resistant piles 2, a pile top crown beam 3 and a connecting beam 4; the rear row of bottom-expanded slide-resistant piles 2 are positioned at the rear edge of the slide mass 5, the front row of bottom-expanded slide-resistant piles 1 and the rear row of bottom-expanded slide-resistant piles 2 are fixed through 9 connecting beams 4 and are arranged along the downward sliding direction of the slide mass 5, and the surfaces of the 9 connecting beams 4 form a horizontal plane; the front row of expanded-base slide-resistant piles 1 and the rear row of expanded-base slide-resistant piles 2 are respectively composed of 9 expanded-base slide-resistant piles, and the expanded-base slide-resistant piles are fixedly connected with each other through pile top crown beams 3 which are sleeved (three characters are recommended to be removed); the pile top crown beam 3 is vertically connected with the connecting beam 4; the length of the front row of club-footed anti-slide piles 1 is less than that of the rear row of club-footed anti-slide piles 2. When the front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are manually drilled piles, the diameter of the pile body is 1.4m, and when the pile bodies are drilled piles, the diameter of the pile body is 0.9 m. The embedded sections of the front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are arranged on the slide bed 7; for a soil layer or a weak rock stratum, the length of the embedded section of the front row of bottom-expanded slide-resistant piles 1 is 1/4 of the total pile length, and the length of the embedded section of the rear row of bottom-expanded slide-resistant piles 2 is 1/3 of the total pile length; for complete or hard rock strata, the length of the embedded section of the front row of the bottom-expanded slide-resistant piles 1 is 1/5 of the total pile length, and the length of the embedded section of the rear row of the bottom-expanded slide-resistant piles 2 is 1/4 of the total pile length. The front row of club-footed anti-slide piles 1 and the rear row of club-footed anti-slide piles 2 are tightly distributed at the positions close to the central line of the landslide and loose at the two sides; the distance between the closely distributed piles is 3 times of the diameter of the pile body, and the distance between the loosely distributed piles is 4 times of the diameter of the pile body. The distance between the front row of club-footed slide-resistant piles 1 and the rear row of club-footed slide-resistant piles 2 is 3 times of the diameter of the pile body. The bottom expanding ends of the front row of bottom expanding anti-slide piles 1 and the rear row of bottom expanding anti-slide piles 2 are both circular, and the ratio of the diameter of the bottom expanding end to the diameter of the pile body is 2. The rise of the expanded bottom ends of the front row of expanded-bottom slide-resistant piles 1 and the rear row of expanded-bottom slide-resistant piles 2 is 0.33 times of the diameter of the expanded bottom ends. The slope of the expanded bottom end side faces of the front row of expanded bottom slide-resistant piles 1 and the rear row of expanded bottom slide-resistant piles 2 is not more than 1/3 of the material quality of silt or cohesive soil; the material of the weathered rock or pebble layer is not more than 1/2. The width of the pile top crown beam 3 is larger than the diameter of the pile body, and the height is 0.8 d. The width of the connecting beam 4 is larger than the diameter of the pile body, the height is not smaller than 0.8d, and the ratio of the height of the connecting beam 4 to the distance between the front row of club-footed slide-resistant piles 1 and the rear row of club-footed slide-resistant piles 2 is 1/3.
Claims (10)
1. The utility model provides a slope support is with double length combination friction pile that expands end which characterized in that: comprises front row expanded-base slide-resistant piles (1), rear row expanded-base slide-resistant piles (2), pile top crown beams (3) and connecting beams (4); the rear row of bottom-expanded anti-slide piles (2) are positioned at the rear edge of the landslide body (5), the front row of bottom-expanded anti-slide piles (1) and the rear row of bottom-expanded anti-slide piles (2) are fixed through a plurality of connecting beams (4) and are arranged along the gliding direction of the landslide body (5), and the surfaces of the connecting beams (4) form a horizontal plane; the front row of club-footed slide-resistant piles (1) and the rear row of club-footed slide-resistant piles (2) are respectively composed of a plurality of club-footed slide-resistant piles, and the club-footed slide-resistant piles are fixedly connected by pile top crown beams (3); the pile top crown beam (3) is vertically connected with the connecting beam (4); the length of the front row of club-footed anti-slide piles (1) is less than that of the rear row of club-footed anti-slide piles (2).
2. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: when the front row of club-footed anti-slide piles (1) and the rear row of club-footed anti-slide piles (2) are manual hole digging piles, the diameter of the pile body is not less than 1.2m, and when the pile bodies are drilling piles, the diameter of the pile body is not less than 0.8 m.
3. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: the embedded sections of the front row of club-footed anti-slide piles (1) and the rear row of club-footed anti-slide piles (2) are arranged in the slide bed (7); for a soil layer or a soft rock stratum, the length of an embedded section of the front row of bottom-expanded slide-resistant piles (1) is 1/5-1/4 of the total pile length, and the length of an embedded section of the rear row of bottom-expanded slide-resistant piles (2) is 1/3-1/2 of the total pile length; for a complete or hard rock stratum, the length of the embedded section of the front row of bottom-expanded slide-resistant piles (1) is 1/6-1/5 of the total pile length, and the length of the embedded section of the rear row of bottom-expanded slide-resistant piles (2) is 1/4-1/3 of the total pile length.
4. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: the front row of club-footed anti-slide piles (1) and the rear row of club-footed anti-slide piles (2) are tightly distributed at the positions close to the central line of the landslide, and the two sides of the club-footed anti-slide piles are loose; the closely distributed pile spacing is 2-3 times of pile body diameter, and the loosely distributed pile spacing is 3-4 times of pile body diameter.
5. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: the distance between the front row of club-footed anti-slide piles (1) and the rear row of club-footed anti-slide piles (2) is 2-4 times of the diameter of the pile body.
6. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: the expanded bottom ends of the front row of expanded bottom slide-resistant piles (1) and the rear row of expanded bottom slide-resistant piles (2) are both circular, and the ratio of the diameter of the expanded bottom end to the diameter of the pile body is not more than 3.
7. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 6, characterized in that: the rise of the bottom expanding ends of the front row of bottom expanding anti-slide piles (1) and the rear row of bottom expanding anti-slide piles (2) is 0.3-0.35 times of the diameter of the bottom expanding ends.
8. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: the slope of the side faces of the bottom expanding end of the front row of bottom expanding anti-slide piles (1) and the rear row of bottom expanding anti-slide piles (2) is not more than 1/3 of the material of silt or cohesive soil; the material of the weathered rock or pebble layer is not more than 1/2.
9. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: the width of the pile top crown beam (3) is larger than the diameter of the pile body, and the height of the pile top crown beam is 0.8 time of the diameter of the pile body.
10. The double-row bottom-expanding long-short combined slide-resistant pile for slope support according to claim 1, characterized in that: the width of the connecting beam (4) is larger than the diameter of the pile body, the height of the connecting beam is not smaller than 0.8 time of the diameter of the pile body, and the ratio of the height of the connecting beam (4) to the distance between the front row of bottom-expanded slide piles (1) and the rear row of bottom-expanded slide piles (2) is 1/6-1/3.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684841A (en) * | 2021-08-10 | 2021-11-23 | 广西大学 | Yielding anti-sliding double-row pile supporting structure |
| CN114457815A (en) * | 2022-01-26 | 2022-05-10 | 江苏科技大学 | Double-row bottom-expanding long-and-short combined anti-slide pile |
| CN115949076A (en) * | 2022-11-01 | 2023-04-11 | 广州市市政工程设计研究总院有限公司 | Double-row bottom-expanding long-short combined anti-slide pile for slope special protection |
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| CN113684841A (en) * | 2021-08-10 | 2021-11-23 | 广西大学 | Yielding anti-sliding double-row pile supporting structure |
| CN114457815A (en) * | 2022-01-26 | 2022-05-10 | 江苏科技大学 | Double-row bottom-expanding long-and-short combined anti-slide pile |
| CN115949076A (en) * | 2022-11-01 | 2023-04-11 | 广州市市政工程设计研究总院有限公司 | Double-row bottom-expanding long-short combined anti-slide pile for slope special protection |
| CN115949076B (en) * | 2022-11-01 | 2023-10-13 | 广州市市政工程设计研究总院有限公司 | Double-row bottom-enlarging long-short combined slide-resistant pile special for slope protection |
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Application publication date: 20191213 |