Anchor bar pile rooting retaining wall-anchor cable combined supporting structure and construction method thereof

Abstract

The invention relates to the technical field of roadbed supporting, and particularly discloses an anchor bar pile rooting retaining wall-anchor cable combined supporting structure and a construction method thereof.The combined supporting structure comprises a retaining wall, anchor bar piles are arranged below the retaining wall, a top beam is arranged at the tops of the anchor bar piles, and the retaining wall is fixedly arranged at the top end of the top beam; the retaining wall is provided with a reserved hole used for installing an anchor cable, a connecting sleeve is embedded in the side wall of the reserved hole, and the anchor cable is fixed to the connecting sleeve. A grouting pipe is arranged in the anchor cable, an anchoring head is fixedly arranged at the end, away from the retaining wall, of the anchor cable, and the grouting pipe communicates with the anchoring head. A grout outlet is formed in the anchoring head, and a clamping mechanism is arranged at the grout outlet. The non-excavation type construction method is adopted, disturbance to a natural abrupt slope soil body is reduced, the original natural environment and slope stability are protected, complex pile foundation construction mechanical requirements are avoided, the construction process is simplified, and the construction difficulty and the engineering cost in complex terrains are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed support, and in particular to an anchor pile root retaining wall-anchor cable combined support structure and a construction method thereof. Background Art

[0002] Retaining walls refer to structures that support roadbed fill or hillside soil to prevent deformation and instability of fill or soil. Existing retaining walls are widely used in highways, railways, municipal engineering and other fields due to their significant technical and economic benefits. Retaining walls on rocky steep slopes of mountainous highways, restricted terrain or insufficient foundation bearing capacity, and sections with poor stability usually require foundation treatment or deep foundations.

[0003] Common retaining wall foundation forms include expanded foundation and pile foundation. Expanded foundation has a large excavation volume, which is easy to disturb the natural soil of the steep slope and affect the overall stability of the slope; pile foundation construction machinery is complex, difficult to construct on steep slopes or narrow terrain, and the project cost is high. Summary of the invention

[0004] The purpose of the present invention is to provide an anchor pile root retaining wall-anchor cable combined supporting structure and a construction method thereof, so as to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides an anchor pile rooted retaining wall-anchor cable combined support structure, including a retaining wall, an anchor pile is arranged at the bottom of the retaining wall, a crown beam is arranged on the top of the anchor pile, and the retaining wall is fixedly arranged on the top of the crown beam; a reserved hole for installing the anchor cable is arranged on the retaining wall, a connecting sleeve is pre-embedded in the side wall of the reserved hole, and the anchor cable is fixed to the connecting sleeve; a grouting pipe is arranged inside the anchor cable, an anchor head is fixedly arranged at one end of the anchor cable away from the retaining wall, and the grouting pipe is connected to the anchor head; a slurry outlet is arranged on the anchor head, and a clamping mechanism is arranged at the slurry outlet.

[0006] Preferably, the anchor cable comprises a plurality of steel bar bundles, and the steel bar bundles are arranged along the outer wall of the grouting pipe.

[0007] Preferably, a positioning clamp is sleeved on the outer wall of the grouting pipe, and the steel bar bundle is limitedly matched with the grouting pipe through the positioning clamp.

[0008] Preferably, the positioning clamp includes a clamping plate slidably mounted on the grouting pipe, a plurality of arc-shaped notches are provided on the side wall of the clamping plate, the arc-shaped notches are adapted to the steel bar bundle, and the plurality of arc-shaped notches are arranged at equal intervals along the circumferential direction of the clamping plate; a clamping groove is provided between two adjacent arc-shaped notches, a clamping block is slidably arranged in the clamping groove, the clamping block is a T-shaped structure, and holes for passing bolts are provided on the side wall of the clamping groove and the clamping block, the clamping block is fixed to the clamping plate by bolts, and the steel bar bundle is installed between the clamping block and the clamping plate.

[0009] Preferably, the angle between the anchor cable and the horizontal direction is 0° to 20°.

[0010] Preferably, the clamping mechanism includes an arc-shaped spring piece, one end of which is fixedly connected to the slurry outlet on the anchor head, and the other end of the arc-shaped spring piece is a free end. A pad is provided between the arc-shaped spring piece and the side wall of the slurry outlet, and the arc-shaped spring piece is clamped in the slurry outlet through the pad.

[0011] Preferably, a support column is fixedly connected to the inner side of the free end of the arc-shaped spring piece.

[0012] Preferably, an annular pad and a plugging head are provided on the side of the retaining wall away from the slope surface, the annular pad is sleeved on the connecting sleeve, and the anchor cable is welded and fixed to the annular pad; the plugging head is used to seal the grouting pipe, and the plugging head is welded and fixed to the anchor cable.

[0013] The construction method of the anchor pile rooted retaining wall-anchor cable combined support structure of the present invention comprises anchor pile construction, anchor cable construction and retaining wall construction; wherein:

[0014] Anchor pile construction includes:

[0015] S1. Determine the location, quantity, depth and hole diameter of anchor pile construction, and conduct on-site survey and pile hole forming;

[0016] S2. Anchor piles are manufactured according to design requirements, and the manufactured anchor piles are inserted into the pile holes according to design requirements. After the anchor piles are installed in place, concrete is injected into the pile holes;

[0017] Anchor cable construction includes:

[0018] S1. Determine the parameters of the position, quantity, depth and diameter of the anchor holes, and drill the anchor holes on the slope surface;

[0019] S2. After the drilling is completed, the exploration hole is carried out. After the drilling meets the design requirements, the anchor cable is installed;

[0020] S3, anchor cable grouting;

[0021] Retaining wall construction includes:

[0022] S1. After the anchor pile concrete reaches the strength requirement, the steel cage of the retaining wall of the crown beam is tied, and the steel cage of the crown beam and the steel cage of the retaining wall are connected and fixed to the anchor pile, and the connecting sleeve is pre-buried when the steel cage of the retaining wall is tied;

[0023] S2, formwork support, and pouring of concrete, and sealing of the connecting sleeve before pouring of concrete;

[0024] S3. After the concrete of the retaining wall and the anchor cable grouting have reached the strength requirements, the anchor cables are tensioned and fixed.

[0025] Preferably, after the anchor cables are tensioned and fixed, the area between the retaining wall and the slope surface is backfilled according to design requirements.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] The anchor pile rooted retaining wall-anchor cable combined support structure and the construction method thereof provided by the present invention can enhance the stability of the retaining wall by arranging the anchor piles, and can improve the bearing capacity of the retaining wall by arranging the anchor cables. Furthermore, by arranging a clamping mechanism on the anchoring head, the anchoring strength of the anchor cables can be improved by utilizing the clamping mechanism, thereby further improving the bearing capacity of the retaining wall.

[0028] In addition, since the present invention adopts a trenchless construction method, it reduces the disturbance to the natural steep slope soil, protects the original natural environment and slope stability, avoids the need for complex pile foundation construction machinery, simplifies the construction process, and reduces the construction difficulty and project cost in complex terrain. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is an overall schematic diagram of the anchor pile root retaining wall-anchor cable combined support structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the positioning card of the present invention;

[0032] Figure 3 This is a schematic diagram of the connection between the positioning clamp and the steel bar bundle of the present invention;

[0033] Figure 4It is a structural schematic diagram of the anchor head of the present invention;

[0034] Figure 5 This is a state diagram of the clamping mechanism on the anchor head of the present invention when it is not deployed;

[0035] Figure 6 It is a state diagram of the clamping mechanism on the anchor head of the present invention when it is unfolded;

[0036] In the figure: 1. retaining wall; 2. anchor pile; 3. crown beam; 4. anchor cable; 5. anchor head; 6. reinforcement bundle; 7. clamping plate; 8. arc-shaped notch; 9. clamping groove; 10. clamping block; 11. arc-shaped spring piece; 12. cushion block; 13. support column; 14. annular pad; 15. plugging head. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] like Figures 1 to 6 As shown, the present invention provides an anchor pile rooted retaining wall-anchor cable combined supporting structure, comprising a retaining wall 1, an anchor pile 2 is arranged below the retaining wall 1, a crown beam 3 is arranged on the top of the anchor pile 2, and the retaining wall 1 is fixedly arranged on the top of the crown beam 3; a reserved hole for installing an anchor cable 4 is arranged on the retaining wall 1, a connecting sleeve is pre-embedded in the side wall of the reserved hole, and the anchor cable 4 is fixed to the connecting sleeve; a grouting pipe is arranged inside the anchor cable 4, an anchor head 5 is fixedly arranged at one end of the anchor cable 4 away from the retaining wall 1, and the grouting pipe is connected to the anchor head 5; a slurry outlet is arranged on the anchor head 5, and a clamping mechanism is arranged at the slurry outlet.

[0039] The present invention can enhance the stability of the retaining wall 1 by arranging the anchor piles 2, and can improve the bearing capacity of the retaining wall 1 by arranging the anchor cables 4. Moreover, by arranging a clamping mechanism on the anchor head 5, the anchoring strength of the anchor cables 4 can be improved by utilizing the clamping mechanism, thereby further improving the bearing capacity of the retaining wall 1.

[0040] According to a further optimized solution, the anchor cable 4 includes a plurality of steel bar bundles 6, and the steel bar bundles 6 are arranged along the outer wall of the grouting pipe.

[0041] To further optimize the solution, a positioning clamp is sleeved on the outer wall of the grouting pipe, and the steel bar bundle 6 is limitedly matched with the grouting pipe through the positioning clamp.

[0042] By setting the positioning clips, there will be a certain gap between the steel bar bundle 6 and the grouting pipe. When grouting the anchor cable 4, the mortar can be allowed to enter the gap, thereby increasing the contact area between the steel bar bundle 6 and the mortar, which helps to improve the anchoring strength of the anchor cable 4.

[0043] A further optimized solution is provided, in which the positioning clamp comprises a clamping plate 7 which is slidably mounted on the grouting pipe, and a plurality of arc-shaped notches 8 are provided on the side wall of the clamping plate 7, the arc-shaped notches 8 are matched with the steel bar bundle 6, and the plurality of arc-shaped notches 8 are arranged at equal intervals along the circumferential direction of the clamping plate 7; a clamping groove 9 is provided between two adjacent arc-shaped notches 8, a clamping block 10 is slidably arranged in the clamping groove 9, the clamping block 10 is a T-shaped structure, and holes for passing bolts are provided on the side wall of the clamping groove 9 and the clamping block 10, the clamping block 10 is fixed to the clamping plate 7 by bolts, and the steel bar bundle 6 is installed between the clamping block 10 and the clamping plate 7.

[0044] By cooperating with the clamping plate 7 and the clamping block 10, the steel bar bundle 6 can be fixed in the arc-shaped notch 8 on the clamping plate 7, and the setting of the clamping plate 7 can increase the connection strength between the anchor cable 4 and the mortar.

[0045] According to a further optimization scheme, the angle between the anchor cable 4 and the horizontal direction is 0° to 20°.

[0046] A further optimized solution is that the clamping mechanism includes an arc-shaped spring piece 11, one end of the arc-shaped spring piece 11 is fixedly connected to the slurry outlet on the anchor head 5, and the other end of the arc-shaped spring piece 11 is a free end. A pad 12 is arranged between the arc-shaped spring piece 11 and the side wall of the slurry outlet, and the arc-shaped spring piece 11 is clamped in the slurry outlet through the pad 12.

[0047] During the grouting process, after the mortar enters the anchor head 5 through the grouting pipe, as the pressure inside the anchor head 5 increases, the pad 12 between the arc-shaped spring piece 11 and the slurry outlet will pop out under the action of pressure. After losing the limit of the pad 12, the arc-shaped spring piece 11 recovers from a straight state to an arc-shaped state. At this time, the arc-shaped spring piece 11 can be clamped on the inner wall of the anchor hole, and a barb-like structure is formed between the arc-shaped spring piece 11 and the anchor head 5, which helps to improve the anchoring strength between the anchor head 5 and the drilled hole.

[0048] According to a further optimized solution, a support column 13 is fixedly connected to the inner side of the free end of the arc-shaped spring piece 11 .

[0049] The arc-shaped spring piece 11 has elasticity, which may lead to the problem of insufficient rigidity, thereby affecting the supporting effect of the arc-shaped spring piece 11. For this reason, a support column 13 is provided. When the arc-shaped spring piece 11 returns to an arc-shaped state, driven by the arc-shaped spring piece 11, the support column 13 can be changed from horizontal to inclined in the anchor head 5, so that the free end of the support column 13 abuts against the inner wall of the anchor head 5 under the action of the arc-shaped spring piece 11, thereby utilizing the setting of the support column 13 to improve the structural strength of the arc-shaped spring piece 11.

[0050] To further optimize the solution, an annular pad 14 and a plugging head 15 are provided on the side of the retaining wall 1 away from the slope surface. The annular pad 14 is sleeved on the connecting sleeve, and the anchor cable 4 is welded and fixed to the annular pad 14; the plugging head 15 is used to plug the grouting pipe, and the plugging head 15 is welded and fixed to the anchor cable 4.

[0051] The construction method of the anchor pile root retaining wall-anchor cable combined support structure of the present invention comprises the construction of anchor piles 2, anchor cables 4 and retaining wall 1; wherein:

[0052] The construction of anchor pile 2 includes:

[0053] S1, determine the location, quantity, depth and hole diameter parameters of the anchor pile 2 construction, and conduct on-site survey and pile hole forming;

[0054] S2, manufacturing the anchor pile 2 according to the design requirements, and inserting the manufactured anchor pile 2 into the pile hole according to the design requirements. After the anchor pile 2 is installed in place, concrete is injected into the pile hole;

[0055] Anchor cable 4 construction includes:

[0056] S1. Determine the parameters of the position, quantity, depth and diameter of the anchor holes, and drill the anchor holes on the slope surface;

[0057] S2, after the drilling is completed, the exploration hole is carried out, and after the drilling meets the design requirements, the anchor cable 4 is installed;

[0058] S3, anchor cable 4 grouting;

[0059] Retaining wall 1 construction includes:

[0060] S1, after the concrete of the anchor pile 2 reaches the strength requirement, the steel cage of the retaining wall 1 of the crown beam 3 is tied, and the steel cage of the crown beam 3 and the steel cage of the retaining wall 1 are connected and fixed to the anchor pile 2, and the connecting sleeve is pre-buried when the steel cage of the retaining wall 1 is tied;

[0061] S2, formwork support, and pouring of concrete, and sealing of the connecting sleeve before pouring of concrete;

[0062] S3. After the concrete of the retaining wall 1 and the grouting of the anchor cable 4 reach the strength requirement, the anchor cable 4 is tensioned and fixed.

[0063] To further optimize the solution, after the anchor cables 4 are tensioned and fixed, the area between the retaining wall 1 and the slope surface is backfilled according to the design requirements.

[0064] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An anchor pile root retaining wall-anchor cable combined support structure, characterized in that: The invention comprises a retaining wall (1), wherein an anchor pile (2) is arranged below the retaining wall (1), a crown beam (3) is arranged on the top of the anchor pile (2), and the retaining wall (1) is fixedly arranged on the top of the crown beam (3); a reserved hole for installing an anchor cable (4) is arranged on the retaining wall (1), a connecting sleeve is pre-buried in the side wall of the reserved hole, and the anchor cable (4) is fixed to the connecting sleeve; a grouting pipe is arranged inside the anchor cable (4), an anchor head (5) is fixedly arranged at one end of the anchor cable (4) away from the retaining wall (1), and the grouting pipe is connected to the anchor head (5); a grouting outlet is arranged on the anchor head (5), and a clamping mechanism is arranged at the grouting outlet.

2. The anchor pile root retaining wall-anchor cable combined support structure according to claim 1 is characterized in that: The anchor cable (4) comprises a plurality of steel bar bundles (6), and the steel bar bundles (6) are arranged along the outer wall of the grouting pipe.

3. The anchor pile root retaining wall-anchor cable combined support structure according to claim 2 is characterized in that: A positioning clamp is sleeved on the outer wall of the grouting pipe, and the steel bar bundle (6) is limitedly matched with the grouting pipe through the positioning clamp.

4. The anchor pile root retaining wall-anchor cable combined support structure according to claim 3 is characterized in that: The positioning clamp comprises a clamping plate (7) slidably mounted on the grouting pipe, a plurality of arc-shaped notches (8) are provided on the side wall of the clamping plate (7), the arc-shaped notches (8) are adapted to the reinforcing bar bundle (6), and the plurality of arc-shaped notches (8) are arranged at equal intervals along the circumferential direction of the clamping plate (7); a clamping groove (9) is provided between two adjacent arc-shaped notches (8), a clamping block (10) is slidably arranged in the clamping groove (9), the clamping block (10) is a T-shaped structure, the side wall of the clamping groove (9) and the clamping block (10) are both provided with holes for passing bolts, the clamping block (10) is fixed to the clamping plate (7) by bolts, and the reinforcing bar bundle (6) is installed between the clamping block (10) and the clamping plate (7).

5. The anchor pile root retaining wall-anchor cable combined support structure according to claim 1 is characterized in that: The angle between the anchor cable (4) and the horizontal direction is 0° to 20°.

6. The anchor pile root retaining wall-anchor cable combined support structure according to claim 1 is characterized in that: The clamping mechanism comprises an arc-shaped spring piece (11), one end of the arc-shaped spring piece (11) is fixedly connected to the slurry outlet on the anchor head (5), the other end of the arc-shaped spring piece (11) is a free end, a cushion block (12) is provided between the arc-shaped spring piece (11) and the side wall of the slurry outlet, and the arc-shaped spring piece (11) is clamped in the slurry outlet via the cushion block (12).

7. The anchor pile root retaining wall-anchor cable combined support structure according to claim 6 is characterized in that: A support column (13) is fixedly connected to the inner side of the free end of the arc-shaped spring piece (11).

8. The anchor pile root retaining wall-anchor cable combined support structure according to claim 2 is characterized in that: An annular pad (14) and a plugging head (15) are provided on the side of the retaining wall (1) away from the slope surface; the annular pad (14) is sleeved on the connecting sleeve; the anchor cable (4) is fixed to the annular pad (14) by welding; the plugging head (15) is used to plug the grouting pipe, and the plugging head (15) is fixed to the anchor cable (4) by welding.

9. The construction method of the anchor pile root retaining wall-anchor cable combined support structure according to any one of claims 1 to 8, characterized in that: The method comprises the construction of anchor piles (2), anchor cables (4) and retaining walls (1); wherein: The construction of anchor piles (2) includes: S1, determining the location, quantity, depth and hole diameter parameters of the anchor pile (2) construction, and conducting on-site survey and pile hole forming; S2, manufacturing anchor piles (2) according to design requirements, and inserting the manufactured anchor piles (2) into the pile holes according to design requirements. After the anchor piles (2) are installed in place, concrete is injected into the pile holes; The construction of anchor cable (4) includes: S1. Determine the parameters of the position, quantity, depth and diameter of the anchor holes, and drill the anchor holes on the slope surface; S2, after the drilling is completed, the exploration hole is carried out, and after the drilling meets the design requirements, the anchor cable (4) is installed; S3, anchor cable (4) grouting; The construction of retaining wall (1) includes: S1, after the concrete of the anchor pile (2) reaches the strength requirement, the steel cage of the retaining wall (1) of the crown beam (3) is tied, and the steel cage of the crown beam (3) and the steel cage of the retaining wall (1) are connected and fixed to the anchor pile (2), and the connecting sleeve is pre-buried when the steel cage of the retaining wall (1) is tied; S2, formwork support, and pouring of concrete, and sealing of the connecting sleeve before pouring of concrete; S3. After the concrete of the retaining wall (1) and the anchor cable (4) are grout-casted to meet the strength requirements, the anchor cable (4) is tensioned and fixed.

10. The construction method of the anchor pile root retaining wall-anchor cable combined support structure according to claim 9, characterized in that: After the anchor cable (4) is tensioned and fixed, the area between the retaining wall (1) and the slope surface is backfilled according to design requirements.

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