CN215211096U - Modular double friction pile retaining structure - Google Patents
Modular double friction pile retaining structure Download PDFInfo
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- CN215211096U CN215211096U CN202121151774.6U CN202121151774U CN215211096U CN 215211096 U CN215211096 U CN 215211096U CN 202121151774 U CN202121151774 U CN 202121151774U CN 215211096 U CN215211096 U CN 215211096U
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Abstract
The utility model provides a modular double friction pile retaining structure, belongs to landslide control engineering field, and this retaining structure includes front row friction pile, back row friction pile, prestressed anchorage cable and linking roof beam, front row friction pile includes many first friction pile that is perpendicular to ground and equidistance distribution buries in the sliding bed, back row friction pile includes many second friction pile that is perpendicular to ground and equidistance distribution buries in the sliding bed, front row friction pile staggers half an interval with back row friction pile, constitutes quincunx plane and arranges, and the pile top of first friction pile and second friction pile links into an organic whole through linking roof beam; one end of the prestressed anchor cable is fixed at the upper end of the anti-slide pile, and the other end of the prestressed anchor cable is driven into the slide bed and is fixed through grouting. The utility model discloses a double friction pile and the anchor rope cooperation of arranging of plum blossom shape constitute integrative retaining structure, administer the landslide, and its cling compound ability is strong, and the atress performance is good, and construction safety can be used to the great landslide of scale and administers engineering and high steep slope support engineering.
Description
Technical Field
The utility model belongs to the landslide improvement engineering field especially relates to a modular double friction pile retaining structure.
Background
Many engineering construction sites in China are located in mountainous and hilly areas, the engineering construction can change formation occurrence conditions, original geological balance of the sites is broken, soil body sliding is easily caused, a landslide phenomenon occurs, and life and property safety of people is threatened, so that corresponding anti-sliding measures are necessary to be adopted, and the landslide phenomenon is reduced.
At present, in landslide control projects, anti-slide piles are widely applied to landslide control projects and high and steep slope support projects due to the advantages of small masonry amount, flexible pile position arrangement, strong adaptability and the like. The anti-slide pile is a pile inserted into the landslide body and deeply inserted into the stable stratum, and the anti-slide pile plays a role in resisting the thrust of the landslide body and maintaining the stability of the landslide by utilizing the anchoring effect of the stable stratum. In the prior art, landslide control is mostly realized by adopting simple arrangement of single-row or double-row anti-slide piles, and for large-scale landslide control engineering, due to the limitation of pile spacing and landslide body width, the requirement of anti-slide force cannot be met by only arranging the single-row anti-slide piles and the double-row anti-slide piles, and other measures are often required to be added on the basis of the anti-slide piles to improve the anti-slide capability of the whole structure.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a modular friction pile retaining structure, this retaining structure adopt the double friction pile and the anchor rope cooperation of plum blossom shape arranging to constitute integrative retaining structure, administer the landslide, and its cling compound ability is strong, and the atress performance is good, and construction safety can be used to the great landslide of scale and administer engineering and high steep side slope support engineering.
In order to achieve the purpose, the utility model discloses a realize by following technical side:
a combined double-row anti-slide pile retaining structure comprises front-row anti-slide piles, rear-row anti-slide piles, pre-stressed anchor cables and connecting beams; the front row of anti-slide piles comprise a plurality of first anti-slide piles which are vertical to the ground and are distributed in the sliding bed at equal intervals, the rear row of anti-slide piles comprise a plurality of second anti-slide piles which are vertical to the ground and are distributed in the sliding bed at equal intervals, and the front row of anti-slide piles and the rear row of anti-slide piles are staggered by half of intervals to form quincunx plane arrangement; the connecting beam is sequentially connected with the pile tops of the first anti-slide pile and the second anti-slide pile to form a continuous Z-shaped structure; one end of the prestressed anchor cable is respectively connected with the upper parts of the first anti-slide pile and the second anti-slide pile, and the other end of the prestressed anchor cable penetrates through the anti-slide piles to be fixedly connected with the sliding bed.
Compared with the prior art, the utility model discloses a linking beam and prestressed anchorage cable combine double anti-slide pile and the stable soil layer of slide bed to form the atress system, resist the gliding thrust of slider, and on one hand, the front and back row anti-slide pile adopts the plum blossom shape plane arrangement form, the pile group effect of the double anti-slide pile of better performance, and the restriction soil body warp realizes the antiskid; on the other hand, the pile tops of the first row of anti-slide piles and the second row of anti-slide piles are connected with the connecting beam, and the pre-stressed anchor cables are further arranged to connect the slide bed with each anti-slide pile, so that the retaining structure formed by the front row of anti-slide piles and the rear row of anti-slide piles is more stable, the stress is more reasonable, the anti-slide piles can cooperatively deform in the stress process, and meanwhile, part of gliding thrust is dispersed to the deep soil body of the slide bed by utilizing the anchor cables, the deformation of the pile tops of the double rows of piles is effectively limited, the stress of the double rows of piles is reduced, and the economic cost is reduced.
Further, a sleeve penetrating through the anti-slide pile is arranged inside the first anti-slide pile and the second anti-slide pile, and the sleeve is arranged at the upper end of the anti-slide pile at an angle inclined to a landslide. The prestressed anchor cable penetrates through the sleeve, one end of the prestressed anchor cable is connected with the upper end of the slide-resistant pile, and the other end of the prestressed anchor cable is driven into a stable soil layer of the sliding bed to connect the slide-resistant pile and the stable soil layer together, so that the stress of the double-row pile is reduced.
Furthermore, the prestressed anchor cable comprises an anchor head, an anchor cable free section and an anchor cable anchoring section which are sequentially connected, the prestressed anchor cable penetrates through the sleeve, one end of the prestressed anchor cable is fixed on the pile wall at the upper end of the slide-resistant pile through the anchor head, the anchor cable free section penetrates through the slide-resistant pile and the sliding body to enter the slide bed and is connected with the anchor head and the anchor cable anchoring section, and the anchor cable anchoring section at the other end penetrates into the slide bed and is fixed in the slide bed through grouting. The anchor cable anchoring section is a foundation for anchoring the anchor cable in a rock body to provide prestress, and the anchor cable anchoring section is fixed in the slide bed through grouting to provide the prestress, so that the tensile stress of the double-row anti-slide pile is reduced or offset; the anchor head is an anchor cable for providing tension tonnage and a locking position, penetrates through the anti-slide pile and is fixed on one side of the anti-slide pile, which is back to the slide bed, so that the anti-slide pile and the slide bed are connected into a whole; the anchor cable free section is connected with the anchor head and the anchor cable anchoring section, and is tensioned to provide prestress, so that the stress state of the slide-resistant pile is changed finally.
Furthermore, the included angle between the sleeve and the horizontal plane is 15-35 degrees, and the sleeve is inclined towards the direction of the slide bed in the slide-resistant pile. The sleeve is fixed in the anti-slide pile at a specific inclination angle, so that the inclination angle of the pre-stressed anchor cable is limited, and the construction requirement is met.
Further, the retaining structure further comprises a pile front landslide prevention slope, wherein the pile front landslide prevention slope is formed by piling landslide prevention soil in front of the front row of anti-skidding piles, and the pile front landslide prevention slope is jointed with the ground to form a slide surface. The anti-slip soil in front of the pile can provide the anti-slip pile with front resistance and reduce displacement caused by gliding thrust.
Preferably, the first slide-resistant pile and the second slide-resistant pile are cylindrical cast-in-place concrete piles, the pile diameter is larger than 1.0m, and the grade of the concrete strength of a pile body is not lower than C25.
Further, the pile center distance between adjacent first anti-slide piles in the front row of anti-slide piles is equal to the pile center distance between adjacent second anti-slide piles in the rear row of anti-slide piles, the pile center distances are 3-5 times of the diameters of the anti-slide piles, and the pile row distance between the front row of anti-slide piles and the rear row of anti-slide piles is 3-5 times of the diameters of the anti-slide piles. In the double-row anti-slide piles, the difference between the pile center distance and the pile row distance influences the retaining effect of the double-row anti-slide piles, the pile distance is set according to the effective influence area of the double-row anti-slide piles, and the double-row anti-slide piles are matched with each other under the arrangement of the reasonable pile center distance and the pile row distance, so that the pile group effect and the soil arch effect are better exerted, the landslide resistance is commonly born, and the optimal anti-slide effect is realized.
Drawings
Fig. 1 is a schematic view of the anti-slip structure of a combined double-row anti-slip pile retaining structure of the present invention;
fig. 2 is a schematic structural view of a combined double-row anti-slide pile retaining structure of the present invention;
fig. 3 is a top view of a combined double-row anti-slide pile retaining structure of the present invention;
fig. 4 is a schematic view of a first anti-slide pile in a combined double-row anti-slide pile retaining structure of the present invention.
Wherein, the attached figures are marked, 1-sliding bed; 2-a sliding body; 3-bottom surface; 4-a first slide-resistant pile; 41-a cannula; 5-a second slide-resistant peg; 6-prestressed anchorage cable; 61-anchor head; 62-anchor cable free section; 63-anchor cable anchoring section; 7-a tie beam; 8-pile front landslide resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specification, but the described embodiments are only some embodiments of the present invention, not all embodiments, and the scope of the present invention is not limited thereto.
Referring to fig. 1-2, an embodiment of the present invention provides a combined double-row anti-slide pile retaining structure for reinforcing and treating a landslide, the landslide includes a slide bed 1 and a slide body 2 located above the slide bed 1 and having a certain slope, the slide body 2 is fixed above a sliding surface of the slide bed 1; the retaining structure comprises front row anti-slide piles, rear row anti-slide piles, pre-stressed anchor cables 6 and connecting beams 7, wherein the front row anti-slide piles comprise a plurality of first anti-slide piles 4 which are vertical to the ground 9 and embedded in a slide bed, the rear row anti-slide piles comprise a plurality of second anti-slide piles 5 which are vertical to the ground 9 and embedded in the slide bed, the first anti-slide piles 4 and the second anti-slide piles 5 are arranged in proper positions of the slide bed 1 in a quincunx plane, pile tops of the first anti-slide piles 4 and pile tops of the second anti-slide piles 5 are connected into a whole through the connecting beams 7, and the connecting beams 7 form a continuous Z-shaped structure; one end of a prestressed anchor cable 6 is connected with the upper end of the first anti-slide pile 4 or the second anti-slide pile 5, and the other end of the prestressed anchor cable is anchored with a stable soil layer of the slide bed 1 by grouting. The supporting structure combines the double-row slide-resistant piles and the stable soil layer of the sliding bed 1 to form a stress system by adopting the connecting beams 7 and the prestressed anchor cables 6 to resist the downward sliding thrust, and the front-row slide piles and the rear-row slide piles are arranged in a quincunx shape, so that the pile group effect of the double-row pile group is effectively exerted, and the deformation of the soil body is limited.
Specifically, referring to fig. 2 and 3, a plurality of first anti-slide piles 4 are distributed at equal intervals to form front row anti-slide piles, a plurality of second anti-slide piles 5 are distributed at equal intervals to form rear row anti-slide piles, and the front row anti-slide piles and the rear row anti-slide piles are staggered by half an interval, so that the first anti-slide piles 4 and the second anti-slide piles 5 form quincunx plane arrangement; meanwhile, the connecting beam 7 is sequentially connected with the first anti-slide pile 4 and the second anti-slide pile 5, and the connecting beam 7 is respectively anchored and fixed with the main ribs of the pile top of the first anti-slide pile 1 and the pile top of the second anti-slide pile 5 to form an integrated retaining structure, so that greater anti-slide capacity is provided, and the bending rigidity of the combined double-row anti-slide pile is improved.
The first slide-resistant pile 4 and the second slide-resistant pile 5 are cylindrical cast-in-place concrete piles, the diameter of each cast-in-place concrete pile is larger than 1m, and the concrete strength grade of a pile body is not lower than C25; and the pile center distance between the adjacent first anti-slide piles 4 is equal to the pile center distance between the adjacent second anti-slide piles 5, the pile center distances are 3-5 times of the pile diameter, and the pile row distance of the front row of anti-slide piles and the pile row distance of the rear row of anti-slide piles are 3-5 times of the pile diameter.
Referring to fig. 1-3, the prestressed anchor cable 6 includes an anchor head 61, an anchor cable free section 62 and an anchor cable anchoring section 63, and a sleeve 41 with a certain downward inclination angle is embedded in the upper end of the first anti-slide pile, and other anti-slide piles are also of the same structure; an anchor head 61 penetrates through the slide-resistant pile and is fixed on the other side, opposite to the slide bed 1, of the first slide-resistant pile 4, an anchor rope free section 62 penetrates through the slide-resistant pile and enters the slide bed 1 to connect the anchor head 61 and the anchor rope anchoring section 63, a prestressed anchor rope 6 is driven into the slide bed 1 along the inclined direction of a sleeve 41, grouting fixing is carried out on the anchor rope anchoring section 63, prestress is provided by tensioning the anchor rope free section 62, and finally the stress state of each slide-resistant pile is changed.
As shown in fig. 4, when a reinforcement cage of a concrete cast-in-place pile is manufactured, a sleeve 41 is welded at a preset position on the upper portion of the reinforcement cage, an included angle between the sleeve 41 and a horizontal plane is 15-35 degrees, the sleeve is inclined towards a slide bed direction in an anti-slide pile, a prestressed anchor cable can conveniently pass through the sleeve, and the inclination angle of the prestressed anchor cable is limited; the two ends of the casing 41 are closed, and compacted clay is filled in the casing to prevent cement paste from entering the casing 41; meanwhile, a part of the main reinforcement at the top of the reinforcement cage of the cast-in-place concrete pile properly extends out, is bound with the reinforcement of the connecting beam 7 and is integrally cast, so that an integrated retaining structure is formed.
In order to reduce the displacement of the anti-slide pile, a pile front slide resisting slope 8 is arranged in front of the double rows of anti-slide piles, as shown in fig. 1, the pile front slide resisting slope 8 is formed by filling anti-slide soil in front of the anti-slide pile, and is jointed with the ground 3 to form a slide surface, so that resistance is provided for the anti-slide pile, and the displacement caused by the gliding thrust is reduced.
Based on the scheme, the construction process of the retaining structure comprises the following steps:
the method comprises the following steps: selecting a proper position according to the geological conditions and the surrounding environmental conditions of the landslide or the side slope, adopting a mechanical rotary drilling to form a hole, lowering a reinforcement cage pre-embedded with a sleeve 41, and pouring concrete;
step two: after the pile body strength of the front row of slide-resistant piles reaches 80% of the design strength of the concrete for 28 days, starting the construction of the rear row of slide-resistant piles, wherein the drilling positions of the rear row of slide-resistant piles and the front row of slide-resistant piles form quincunx plane arrangement, and the construction steps are the same as the first step;
step three: after the second step is completed, binding the main reinforcement of the connecting beam 7 with the main reinforcement of the anti-slide pile, and performing integral casting;
step four: opening the embedded sleeve 41 at the upper part of the concrete cast-in-place pile, and removing internal clay;
step five: the prestressed anchor cable 6 penetrates through the sleeve 41, the anchor head 61 is fixed on one side of the slide-resistant pile, which is opposite to the slide bed 1, the prestressed anchor cable 6 is driven into the slide bed 1 along the inclined direction of the sleeve, grouting is performed on the anchor cable anchoring section 63 for fixing, and after the strength of grouting body reaches the design strength, the prestressed anchor cable 6 is properly tensioned according to the design prestress requirement.
To sum up, the utility model provides a pair of modular double friction pile retaining structure adopts even tie beam 7 to link the double friction pile that the plum blossom shape was arranged as an organic whole to constitute retaining structure through 6 cooperation sliding beds of prestressed anchorage cable 1, administer the landslide, its cling compound ability is strong, and the atress performance is good, and construction safety can be used to the great landslide of scale and administers engineering and high steep side slope support engineering.
The present invention is not limited to the above embodiment, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology if they do not depart from the spirit and scope of the present invention.
Claims (7)
1. A combined double-row anti-slide pile retaining structure is characterized by comprising a front row of anti-slide piles, a rear row of anti-slide piles, a prestressed anchor cable and a connecting beam, wherein the front row of anti-slide piles comprise a plurality of first anti-slide piles which are vertical to the ground and are distributed at equal intervals and embedded in a slide bed, the rear row of anti-slide piles comprise a plurality of second anti-slide piles which are vertical to the ground and are distributed at equal intervals and embedded in the slide bed, and the front row of anti-slide piles and the rear row of anti-slide piles are staggered by half of a distance to form quincunx plane arrangement; the connecting beam is sequentially connected with the pile tops of the first anti-slide pile and the second anti-slide pile to form a continuous Z-shaped structure; one end of the prestressed anchor cable is respectively connected with the upper parts of the first anti-slide pile and the second anti-slide pile, and the other end of the prestressed anchor cable penetrates through the anti-slide piles to be fixedly connected with the sliding bed.
2. The combined double row anti-slide pile retaining structure as claimed in claim 1, wherein a sleeve penetrating through the anti-slide pile is arranged inside each of the first anti-slide pile and the second anti-slide pile, and the sleeve is arranged at the upper end of the anti-slide pile at an angle inclined to the landslide.
3. The combined double-row anti-slide pile retaining structure as claimed in claim 2, wherein the pre-stressed anchor cable comprises an anchor head, an anchor cable free section and an anchor cable anchoring section which are connected in sequence, the pre-stressed anchor cable penetrates through the sleeve, one end of the pre-stressed anchor cable is fixed on the pile wall at the upper end of the anti-slide pile through the anchor head, the anchor cable free section penetrates through the anti-slide pile and the sliding body to enter the slide bed and is connected with the anchor head and the anchor cable anchoring section, and the anchor cable anchoring section at the other end penetrates into the slide bed and is fixed in the slide bed through grouting.
4. The combined double-row anti-slide pile retaining structure as claimed in claim 2, wherein the included angle between the sleeve and the horizontal plane is 15-35 degrees, and the sleeve is inclined towards the direction of a sliding bed in the anti-slide pile.
5. The combined double-row anti-slide pile retaining structure as claimed in claim 1, further comprising a pile front landslide, wherein the pile front landslide is formed by piling landslide in front of the front row of anti-slide piles, and the landslide is engaged with the ground to form a slide surface.
6. The combined double-row anti-slide pile retaining structure as claimed in claim 1, wherein the first anti-slide pile and the second anti-slide pile are both cylindrical cast-in-place concrete piles, the pile diameter is greater than 1.0m, and the grade of the concrete strength of the pile body is not lower than C25.
7. The combined double-row anti-slide pile retaining structure as claimed in claim 6, wherein the distance between the centers of the adjacent first anti-slide piles in the front row of anti-slide piles and the adjacent second anti-slide piles in the rear row of anti-slide piles is 3-5 times of the diameter of the anti-slide piles, and the distance between the rows of the anti-slide piles in the front row and the rear row is 3-5 times of the diameter of the anti-slide piles.
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| CN202121151774.6U CN215211096U (en) | 2021-05-26 | 2021-05-26 | Modular double friction pile retaining structure |
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| CN202121151774.6U CN215211096U (en) | 2021-05-26 | 2021-05-26 | Modular double friction pile retaining structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114991178A (en) * | 2022-05-31 | 2022-09-02 | 中国地质大学（武汉） | Arc-shaped arranged 'product' -shaped combined type anti-slide pile with multi-arch structure |
| CN115478548A (en) * | 2022-11-04 | 2022-12-16 | 中铁九局集团第一建设有限公司 | Expansive soil cutting slope expansion-reduction earthquake-resistant disaster-prevention combined retaining structure and construction method |
-
2021
- 2021-05-26 CN CN202121151774.6U patent/CN215211096U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114991178A (en) * | 2022-05-31 | 2022-09-02 | 中国地质大学（武汉） | Arc-shaped arranged 'product' -shaped combined type anti-slide pile with multi-arch structure |
| CN115478548A (en) * | 2022-11-04 | 2022-12-16 | 中铁九局集团第一建设有限公司 | Expansive soil cutting slope expansion-reduction earthquake-resistant disaster-prevention combined retaining structure and construction method |
| CN115478548B (en) * | 2022-11-04 | 2024-05-10 | 中铁九局集团第一建设有限公司 | Expansion soil cutting side slope expansion-reducing anti-seismic disaster-preventing combined retaining structure and construction method |
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