Variable cross-section combined rotary excavating slide-resistant pile supporting structure

Abstract

The utility model discloses a variable cross-section combined type rotary excavating anti-slide pile supporting structure, an underground part of an anti-slide pile in the structure forms a pile group system by four round piles, the variable cross-section of the part exposed out of the ground is a large-diameter square pile, and the variable cross-section of the round pile group pile is the large-diameter square pile which is realized by a specially designed reinforcement method. The slide-resistant piles are connected into a whole through the top beams and the waist beams at the variable cross sections; the four round piles of the underground part are arranged in a square shape at equal intervals, the large-diameter square piles exposed out of the ground are constructed through manual formwork erecting and pouring, and soil retaining plates are arranged on the inner sides of the square piles to support and retain surface soil. Mechanical construction of underground anti-slide piles is achieved through the rotary excavating technology and the pile group combination mode, the variable cross-section function of the anti-slide piles is achieved through the pile body reinforcement distribution design, compared with a traditional manual hole digging anti-slide pile supporting structure, the link of manual hole digging is omitted, the construction efficiency is improved, and meanwhile the construction cost is reduced. And the operation safety risk of constructors is also reduced.

Description

Technical Field

[0001] The utility model belongs to the field of slope engineering, in particular to a variable-section combined rotary drilling anti-slide pile supporting structure. Background Art

[0002] Traditional anti-slip piles are manually dug piles with rectangular cross-sections. They have high requirements for the site working environment, limited scope of application, and safety risks for workers. They have long construction periods and high project costs. Therefore, research on an anti-slip pile that can be constructed by mechanical operation can not only avoid the safety risks of manual operations, but also speed up the construction progress, improve environmental applicability, and expand the scope of application, which has great engineering practical value. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model proposes a variable-section combined rotary drilling anti-slide pile support structure to solve the limitations of manually excavated anti-slide piles.

[0004] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0005] A variable-section combined rotary drilling anti-slide pile support structure, comprising a retaining plate, a plurality of anti-slide piles, and a crown beam located at the top of the plurality of anti-slide piles and a waist beam located at the variable section, wherein the crown beam and the waist beam connect the plurality of anti-slide piles into a whole; the retaining plate is located at the inner side of the plurality of anti-slide piles, and is used to support the surface soil;

[0006] The anti-slip piles include a pile group consisting of four round piles located underground, and a square pile exposed above the ground; the four round piles of the anti-slip piles are arranged in a "square" at equal intervals on a plane, the cross-section of the square pile is a square, and the cross-section centerline of the square pile coincides with the cross-section centerline of the pile group consisting of four round piles; the reinforcement of the round piles includes ordinary main reinforcement of round piles and extended main reinforcement of round piles, and the reinforcement of the square piles includes ordinary main reinforcement of square piles and extended main reinforcement of square piles. The top of the ordinary main reinforcement of the round piles penetrates into the waist beam and is connected to the waist beam main reinforcement; the top of the extended main reinforcement of the round piles passes through the waist beam and penetrates into the square piles for a certain length; the bottom of the ordinary main reinforcement of the square piles penetrates into the waist beam and is connected to the waist beam main reinforcement; the tops of the ordinary main reinforcement of the square piles and the extended main reinforcement of the square piles both extend into the crown beam and are connected to the crown beam main reinforcement.

[0007] Furthermore, the reinforcement of the round pile also includes round pile stirrups and transverse reinforcement bars, and the round pile stirrups are spirally distributed; the transverse reinforcement bars are arranged at regular intervals along the longitudinal direction of the round pile.

[0008] Furthermore, the reinforcement of the square piles also includes square pile stirrups distributed in parallel at equal intervals.

[0009] Furthermore, the cross-section of the crown beam is rectangular, the main reinforcements of the crown beam are distributed at equal intervals in a rectangular shape, and the stirrups of the crown beam are distributed in parallel at equal intervals.

[0010] Furthermore, the cross-section of the waist beam is rectangular, the main bars of the waist beam are distributed at equal intervals in a rectangular pattern, and the stirrups of the waist beam are distributed in parallel at equal intervals; some of the main bars of the waist beam are spot-welded to the ordinary main bars of the round piles and the ordinary main bars of the square piles extending into the waist beam.

[0011] Furthermore, the retaining plate is composed of a plurality of prefabricated reinforced concrete slabs, a vertical expansion joint is arranged at the joint of two adjacent prefabricated reinforced concrete slabs, and each prefabricated reinforced concrete slab is provided with a plurality of drainage holes.

[0012] Furthermore, the vertical expansion joint is filled with asphalt hemp tendons.

[0013] Furthermore, a plastic PVC tube is built into the drain hole.

[0014] Furthermore, the ordinary main reinforcement of the round pile and the lengthened main reinforcement of the round pile are distributed at equal intervals.

[0015] Furthermore, the ordinary main reinforcement of the square pile and the extended main reinforcement of the square pile are distributed at equal intervals.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The utility model optimizes the cross-sectional form and distribution form of the anti-slide pile, saves the amount of concrete, and is more environmentally friendly.

[0018] 2. The variable-section combined rotary drilling anti-slip pile support structure of the utility model can adopt mechanical operations for the underground part, and the mechanical construction of the anti-slip piles in the underground part is realized through the rotary drilling process and the combination of pile groups. Compared with traditional manually dug piles, it has better environmental adaptability, expands the scope of application, and improves the construction progress, shortens the construction period, and thus saves engineering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the support structure section and reinforcement diagram.

[0020] Figure 2 This is the plan view of the supporting structure.

[0021] Figure 3 This is the elevation drawing of the supporting structure.

[0022] Figure 4 This is a top view of the anti-slide pile.

[0023] Figure 5 This is a side view of the anti-slide pile.

[0024] Figure 6 This is the reinforcement diagram of the middle pile in the anti-sliding pile.

[0025] Figure 7 This is the reinforcement diagram of the circular pile in the anti-sliding pile.

[0026] Figure 8 This is the reinforcement diagram of the crown beam section.

[0027] Fig. 9 This is the reinforcement diagram of the waist beam section.

[0028] Illustration: 1-anti-slide piles, 2-crown beam, 3-waist beam, 4-retaining board, 5-soil, 6-slope surface, 7-ground, 8-round piles, 9-square piles, 10-ordinary main reinforcement of round piles, 11-lengthened main reinforcement of round piles, 12-ordinary main reinforcement of square piles, 13-lengthened main reinforcement of square piles, 14-connecting reinforcement, 15-round pile stirrups, 16-square pile stirrups, 17-transverse reinforcement, 18-expansion joint, 19-drainage hole, 20-crown beam main reinforcement, 21-crown beam stirrups, 22-waist beam main reinforcement, 23-waist beam stirrups. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below based on the accompanying drawings and preferred embodiments, and the purpose and effects of the present invention will become more clear. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Refer to the attached Figures 1 to 9 As shown, the variable cross-section combined rotary drilling anti-slide pile support structure of this embodiment includes a retaining plate 4, a plurality of anti-slide piles 1, a crown beam 2 located at the top of the plurality of anti-slide piles 1, and a waist beam 3 located at the variable cross-section, wherein the crown beam 2 and the waist beam 3 connect the plurality of anti-slide piles 1 into a whole. The retaining plate 4 is located on the inner side of the plurality of anti-slide piles 1 exposed above the ground, and is used to support the surface soil 5.

[0031] The anti-slide piles 1, the crown beam 2 and the waist beam 3 are all cast-in-place reinforced concrete structures; the retaining plate 4 can be a cast-in-place reinforced concrete structure or a prefabricated reinforced concrete structure. In this embodiment, the retaining plate 4 is a prefabricated reinforced concrete structure.

[0032] like Figure 1 As shown, the anti-sliding pile 1 includes a pile group consisting of four round piles 8 located underground, and a square pile 9 exposed above the ground. The cross section of the intersection of the pile group consisting of four round piles 8 and the square pile 9 changes, and the cross section of the intersection of the round pile group and the large-diameter square pile 9 is strengthened by the waist beam 3. At the same time, the waist beam 3, like the crown beam 2, plays a role in connecting the anti-sliding piles 1 into a whole, as shown in FIG. Figure 3 shown.

[0033] like Figure 2As shown, the four round piles 8 of the anti-sliding pile 1 are arranged in a "square" at equal intervals on the plane, and the mechanical construction is realized by rotary drilling technology; the reinforcement of the round pile 8 includes ordinary main reinforcement 10 of the round pile, extended main reinforcement 11 of the round pile, stirrups 15 of the round pile and transverse reinforcement 17. The ordinary main reinforcement 10 of the round pile and the extended main reinforcement 11 of the round pile are distributed at equal intervals in a circle, the top of the ordinary main reinforcement 10 of the round pile extends into the waist beam 3 and is spot welded with the main reinforcement 22 of the waist beam, and the top of the extended main reinforcement 11 of the round pile passes through the waist beam 3 and further extends into the square pile 9 for a certain length. The stirrups 15 of the round pile are distributed in a spiral manner, and the transverse reinforcement 17 is set at a certain distance along the longitudinal direction of the round pile 8.

[0034] In this embodiment, the diameter of the round pile 8 is 1.0m, and the center spacing of each round pile 8 is 1.5m; the ordinary main reinforcement 10 of the round pile and the lengthened main reinforcement 11 of the round pile are both made of 32mm diameter grade 3 threaded steel bars, a total of 16 bars, which are distributed in a ring shape with equal spacing; the round pile stirrups 15 are made of 12mm diameter grade 3 threaded steel bars, which are distributed spirally with equal spacing, and the distribution spacing is 0.2m; the round pile reinforcement bars 17 are made of 18mm diameter grade 3 threaded steel bars, which are distributed in parallel with equal spacing, and the distribution spacing is 2.0m.

[0035] The cross section of the square pile 9 is a square, and the cross section centerline of the square pile 9 coincides with the cross section centerline of the pile group composed of four round piles 8; the reinforcement of the square pile 9 includes the square pile common main reinforcement 12, the square pile lengthened main reinforcement 13 and the square pile stirrups 16. Among them, the square pile common main reinforcement 12 and the square pile lengthened main reinforcement 13 are distributed at equal intervals in a square, the bottom of the square pile common main reinforcement 12 extends into the waist beam 3 and is spot welded to the waist beam main reinforcement 22; the bottom of the square pile lengthened main reinforcement 13 passes through the waist beam 3 and further extends into the round pile 8 for a certain length; the tops of the square pile common main reinforcement 12 and the square pile lengthened main reinforcement 13 both extend into the crown beam 2 and are spot welded to the crown beam main reinforcement 20. The square pile stirrups 16 are distributed in parallel at equal intervals.

[0036] In this embodiment, the side length of the square pile 9 is 1.6m, and the positions of the square pile lengthened main reinforcement 13 at the four corners of the square pile 9 basically coincide with the cross-sectional center line of the round pile 8; the square pile ordinary main reinforcement 12 and the square pile lengthened main reinforcement 13 are both made of grade 3 threaded steel with a diameter of 32mm, and the distribution spacing is 0.25m; the square pile stirrups 16 are made of grade 3 threaded steel with a diameter of 12mm, and the distribution spacing is 0.2m.

[0037] The round pile 8 of the anti-sliding pile 1 is reasonably distributed and spaced, and the pile body reinforcement distribution is reasonably designed, so that the lengthened main reinforcement 11 of the round pile and the ordinary main reinforcement 12 of the large-diameter square pile 9 can be fully welded together through the connecting reinforcement 14, thereby realizing the variable cross-section function.

[0038] In this embodiment, the connecting rib 14 is made of grade 3 threaded steel bar with a diameter of 32 mm.

[0039] (6) The cross section of the crown beam 2 is rectangular, the crown beam main reinforcements 20 are distributed at equal intervals in a rectangular shape, and the crown beam stirrups 21 are distributed in parallel at equal intervals.

[0040] In this embodiment, the crown beam main reinforcement 20 is made of grade 3 threaded steel with a diameter of 25 mm and a distribution interval of 0.2 m; the crown beam stirrups 21 are made of grade 3 threaded steel with a diameter of 12 mm and a distribution interval of 0.2 m.

[0041] (7) The cross section of the waist beam 3 is rectangular, the waist beam main reinforcement 22 is distributed in equal intervals according to the rectangle, and the waist beam stirrups 23 are distributed in parallel with equal intervals; part of the waist beam main reinforcement 22 is spot welded to the round pile common main reinforcement 10 and the square pile common main reinforcement 12 extending into the waist beam 3.

[0042] In this embodiment, the main reinforcement 22 of the waist beam is made of third-grade threaded steel with a diameter of 25 mm and a distribution spacing of 0.2 m; the waist beam stirrups 23 are made of third-grade threaded steel with a diameter of 12 mm and a distribution spacing of 0.2 m.

[0043] (8) A vertical expansion joint 18 is provided on the retaining plate 4 at a certain interval, and a plurality of drainage holes 19 are provided on each retaining plate 4.

[0044] In this embodiment, the retaining plate 4 is a prefabricated reinforced concrete plate with the size of length×width×thickness=6.0m×4.0m×0.45m, so the vertical expansion joint 18 is set at the joint of the two retaining plates 4, with a spacing of 6.0m; the expansion joint 18 is filled with asphalt hemp tendons. The drainage hole 19 has a diameter of 0.1m, lined with plastic PVC pipes, and the horizontal and vertical distribution spacings are both 2.0m, and are distributed in a rectangular shape.

[0045] The principle of the utility model is as follows: the utility model replaces the manually dug piles with a pile group system composed of round piles using a rotary drilling process, and maximizes the soil arch effect by optimizing the distribution of the round piles, so that the soil retaining effect is close to that of the manually dug piles; on this basis, the cross-section of the pile body above the ground is changed to a square pile, so as to facilitate formwork casting and the setting of retaining plates, while optimizing the cross-sectional size to the maximum extent and saving materials. The cross-section of the round pile group is changed to a large-diameter square pile, and the reasonable distribution spacing design and the reasonable design of the pile body reinforcement distribution make it possible to connect the lengthened main reinforcement of the round pile and the ordinary main reinforcement of the large-diameter square pile into one by full welding of the connecting reinforcement, thereby achieving this. A waist beam is set at the place where the pile body changes its cross-section, so as to better improve the integrity of the anti-sliding pile group.

[0046] Those skilled in the art can understand that the above are only preferred examples of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A variable-section combined rotary drilling anti-slide pile support structure, characterized in that: The invention comprises a retaining plate (4), a plurality of anti-sliding piles (1), a crown beam (2) located at the top of the plurality of anti-sliding piles (1) and a waist beam (3) located at a variable cross-section, wherein the crown beam (2) and the waist beam (3) connect the plurality of anti-sliding piles (1) into a whole; the retaining plate (4) is located on the inner side of the plurality of anti-sliding piles (1) and is used to support the surface soil (5); The anti-sliding pile (1) comprises a pile group consisting of four round piles (8) located underground, and a square pile (9) exposed above the ground; the four round piles (8) of the anti-sliding pile (1) are arranged in a "square" shape at equal intervals on a plane, the cross section of the square pile (9) is a square, and the cross section center line of the square pile (9) coincides with the cross section center line of the pile group consisting of the four round piles (8); the reinforcement of the round pile (8) comprises a round pile ordinary main reinforcement (10) and a round pile extended main reinforcement (11), and the reinforcement of the square pile (9) comprises a square pile ordinary main reinforcement (12 ) and the square pile lengthened main reinforcement (13), the top of the round pile ordinary main reinforcement (10) penetrates into the waist beam (3) and is connected to the waist beam main reinforcement (22); the top of the round pile lengthened main reinforcement (11) passes through the waist beam (3) and penetrates into the square pile (9) for a certain length; the bottom of the square pile ordinary main reinforcement (12) penetrates into the waist beam (3) and is connected to the waist beam main reinforcement (22); the tops of the square pile ordinary main reinforcement (12) and the square pile lengthened main reinforcement (13) both extend into the crown beam (2) and are connected to the crown beam main reinforcement (20).

2. The variable cross-section combined rotary drilling anti-slide pile support structure according to claim 1 is characterized in that: The reinforcement of the round pile (8) further comprises round pile stirrups (15) and transverse reinforcement ribs (17); the round pile stirrups (15) are spirally distributed; and the transverse reinforcement ribs (17) are arranged at regular intervals along the longitudinal direction of the round pile (8).

3. The variable cross-section combined rotary drilling anti-slide pile support structure according to claim 1 is characterized in that: The reinforcement of the square pile (9) further comprises square pile stirrups (16) which are distributed in parallel at equal intervals.

4. The variable cross-section combined rotary drilling anti-slide pile support structure according to claim 1 is characterized in that: The cross section of the crown beam (2) is rectangular, the crown beam main reinforcements (20) are distributed at equal intervals in a rectangular shape, and the crown beam stirrups (21) are distributed in parallel at equal intervals.

5. The variable cross-section combined rotary drilling anti-slide pile support structure according to claim 1 is characterized in that: The cross section of the waist beam (3) is rectangular, the waist beam main reinforcements (22) are distributed at equal intervals in a rectangular manner, and the waist beam stirrups (23) are distributed in parallel at equal intervals; part of the waist beam main reinforcements (22) are spot-welded to the round pile common main reinforcements (10) and the square pile common main reinforcements (12) extending into the waist beam (3).

6. The variable cross-section combined rotary drilling anti-slide pile support structure according to claim 1 is characterized in that: The retaining plate (4) is composed of a plurality of prefabricated reinforced concrete plates, a vertical expansion joint (18) is arranged at the joint of two adjacent prefabricated reinforced concrete plates, and each prefabricated reinforced concrete plate is provided with a plurality of drainage holes (19).

7. The variable cross-section combined rotary drilling anti-slide pile support structure according to claim 6 is characterized in that: The vertical expansion joint (18) is filled with asphalt hemp tendons.

8. The variable-section combined rotary drilling anti-slide pile support structure according to claim 6 is characterized in that: The drain hole (19) is internally provided with a plastic PVC tube.

9. The variable cross-section combined rotary drilling anti-slide pile support structure according to claim 1 is characterized in that: The circular pile common main reinforcement (10) and the circular pile lengthened main reinforcement (11) are distributed at equal intervals.

10. The variable-section combined rotary drilling anti-slide pile support structure according to claim 1 is characterized in that: The square pile common main reinforcement (12) and the square pile lengthened main reinforcement (13) are distributed at equal intervals.

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