Round pile retaining wall structure

Abstract

The utility model discloses a circular pile retaining wall structure. An existing retaining wall is poor in structural stability, complex in construction and long in construction period. The circular pile foundation comprises a plurality of circular piles, and a cast-in-place soil retaining plate is arranged between every two adjacent circular piles. The thickness of the cast-in-place soil retaining plate is half of the diameter of the circular piles, the rear vertical face of the cast-in-place soil retaining plate is arranged at the position of the center connecting line of the two circular piles, and the front vertical face of the cast-in-place soil retaining plate is arranged on the free sides of the circular piles. Trapezoidal stirrups are arranged in the cast-in-place soil retaining plate, the longitudinal stress main reinforcements are arranged in the stirrups, and transverse and vertical distribution steel bars are arranged in the trapezoidal stirrups. The reinforced concrete cast-in-place breast boards are adopted in the vertical formwork between the circular piles, the trapezoid stirrups are arranged in the breast boards, the stability of the breast board structure is guaranteed, the construction technology is simple, cost is low, and popularization is easy.

Description

Technical Field

[0001] This utility model belongs to the technical field of roadbed retaining walls, specifically relating to a circular pile retaining wall structure. Background Technology

[0002] With continuous economic development, the application of high embankments and deep cuts is becoming increasingly widespread. To ensure the slope safety of high-fill and deep-cut sections, retaining walls are typically used to maintain slope stability. Externally mounted retaining walls are widely used due to their aesthetic appeal; however, installing retaining plates behind piles results in large-scale excavation, increasing slope disturbance. To reduce slope disturbance, existing solutions involve casting retaining plates between two piles to reduce excavation, and inserting anchor bolts into the retaining plates to ensure stability. However, the retaining plates are relatively thin, and in actual construction, installing anchor bolts can damage them; furthermore, anchor bolt construction is costly, complex, and time-consuming. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a circular pile retaining wall structure, in which reinforced concrete cast-in-place retaining plates are used as formwork between the circular piles. The retaining wall structure is stable under stress and has low construction costs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A circular pile retaining wall structure, characterized in that: it includes multiple circular piles, and a cast-in-place retaining slab is set between two adjacent circular piles;

[0006] The thickness of the cast-in-place retaining plate is half the diameter of the circular pile. The rear facade of the cast-in-place retaining plate is located at the center line connecting the two circular piles, and the front facade of the cast-in-place retaining plate is located on the open side of the circular pile.

[0007] The cast-in-place retaining slab is equipped with trapezoidal stirrups inside, with longitudinal main reinforcing bars placed inside the stirrups, and horizontal and vertical distributed reinforcing bars placed inside the trapezoidal stirrups.

[0008] Furthermore, a cap beam is provided at the top of the circular pile.

[0009] Furthermore, an eagle beak is provided on the outer side of the bottom of the crown beam.

[0010] Furthermore, an expansion joint is provided every 10m or so in the crown beam, and the joint is filled with asphalt hemp rope with a depth of not less than 0.2m along the inner, outer and top sides.

[0011] Furthermore, the cap beam is internally provided with rectangular circumferentially distributed reinforcing bars and longitudinal main reinforcing bars.

[0012] Furthermore, a pebble filter layer is provided behind the cast-in-place retaining wall.

[0013] Further, the round pile adopts two hoop reinforcement to strengthen the force, the longitudinal force main reinforcement is arranged in the two hoop reinforcements, and the longitudinal force main reinforcement is fixed through the two horizontal distribution steels and the two vertical distribution steels.

[0014] Further, the cast-in-place soil retaining plate is vertically pre-buried with a φ=0.1m PVC drainage hole every 1m, and the PVC pipe of the drainage hole is wrapped with geotextile.

[0015] The utility model discloses the beneficial effects of:

[0016] 1) the utility model discloses the cast-in-place soil retaining plate of reinforced concrete is adopted between round piles, and trapezoidal hoop reinforcement is arranged in the soil retaining plate, so that the stability of the soil retaining plate structure is guaranteed, and the construction technology is simple, the cost is low, and the utility model is easy to popularize.

[0017] 2) the utility model discloses that the round pile top is provided with a corbel, and the overall performance of the structure is further improved, and the stability is higher.

[0018] 3) the utility model discloses that the bored pile below the ground can adopt the drilling mechanical equipment to form a hole and fill the pile, and the degree of mechanization is high, and the construction quality is reliable.

[0019] 4) the utility model discloses that the cast-in-place soil retaining plate is provided with a reserved drainage hole, and the bottom outside of the corbel is provided with an eagle mouth, and the structure has good drainage performance. DRAWINGS

[0020] Figure 1 It is the front view schematic diagram of the round pile soil retaining wall structure of the utility model;

[0021] Figure 2 It is the round pile reinforcement layout drawing of the utility model;

[0022] Figure 3 It is the round pile A-A sectional view of the utility model;

[0023] Figure 4 It is the cast-in-place soil retaining plate reinforcement layout drawing of the utility model;

[0024] Figure 5 It is the corbel reinforcement plane layout drawing of the utility model;

[0025] Figure 6 It is the corbel B-B sectional view of the utility model;

[0026] Figure 7 It is the round pile and corbel connection schematic diagram of the utility model;

[0027] In the drawing, 1. round pile, 2. cast-in-place soil retaining plate, 3. corbel. CONCRETE EMBODIMENT

[0028] The utility model will be explained in detail in combination with specific implementation.

[0029] As Figure 1 , 2 , 3 shown, the utility model includes a plurality of round piles 1, two adjacent round piles 1 between vertical mode adopt reinforced concrete cast-in-place retaining board 2; Round pile 1 adopts reinforced concrete cast-in-place; Round pile 1 adopts two hoop reinforcement to strengthen structure stress, longitudinal stress main reinforcement is arranged in two hoop reinforcement, and longitudinal stress main reinforcement is fixed through 2 way transverse distribution steel and 2 way vertical distribution steel. The longitudinal stress main reinforcement of round pile 1 adopts three parallel reinforcement form, and each section longitudinal stress steel joint adopts double-sided lap welding, and within the range of 35d at the joint, the stress steel area with joint shall not be greater than 50% of the cross-section steel area.

[0030] Pile body concrete should be perfused once, and the pile body is detected by acoustic transmission method after the perfusion of pile body concrete. When the round pile 1 is formed into a hole below the ground, it must be excavated by jumping groove, and the water pumping and draining measures should be taken during the hole forming process to ensure the hole size and quality. During the excavation process above the ground, the slope protection engineering should be well done, and small excavation equipment should be used to reduce the disturbance and damage to the existing slope, and blasting excavation is strictly prohibited; At the same time, the slope deformation and ground subsidence monitoring should be strengthened, and the excavation progress should be adjusted in time, and backfilling measures should be taken if necessary to ensure the stability of the slope.

[0031] As Figure 4 shown, the thickness of cast-in-place retaining board 2 is half of the diameter of round pile 1, the rear vertical surface of cast-in-place retaining board 2 is arranged at the center connecting line position of two round piles 1, and the front vertical surface of cast-in-place retaining board 2 is arranged at the free side of round pile 1; Cast-in-place retaining board 2 is internally provided with a trapezoidal hoop, longitudinal stress main reinforcement is arranged in the hoop, and transverse and vertical distribution steel is arranged inside the trapezoidal hoop. The spacing of longitudinal stress main reinforcement is 0.2m. The stress steel area with joint in round pile 1, cast-in-place retaining board 2 and corbel 3 shall not be greater than 50% of the cross-section steel area.

[0032] As Figure 7 shown, the top of round pile 1 is provided with corbel 3 to realize the connection of pile body, and corbel 3 is cast in place by reinforced concrete. The segment of corbel 3 is arranged obliquely, and the top surface of steel bar is parallel to the top surface of corbel, and the thickness of the protective layer is consistent.

[0033] The bottom outside of corbel 3 is provided with a hawk's beak to prevent the surface water at the top from flowing to the outside of pile body and cast-in-place retaining board 2. Corbel 3 is provided with a expansion joint every 10m or so, and the depth of pitch hemp in the joint along the inner, outer and top three edges is not less than 0.2m.

[0034] As Figure 5 , 6 shown, the inside of corbel 3 is provided with rectangular ring distribution steel and longitudinal stress main reinforcement, and corbel 3 is poured into a whole with round pile 1, and people shall not pass on the surface of corbel 3 before the strength of concrete reaches the design strength.

[0035] The cast-in-place retaining board 2 is provided with a 0.3m-thick pebble counter-filtration layer, and is tamped and compacted to make the board closely adhere to the pile. A φ=0.1m PVC water leakage hole is pre-embedded every 1m vertically in the cast-in-place retaining board 2, and the PVC pipe of the water leakage hole is wrapped with geotextile.

[0036] The construction matters needing attention of the round pile retaining wall are as follows:

[0037] (1) Before construction, the pile should be checked by line laying, and if there is interference, the design site representative should be contacted, and the pile position should be adjusted appropriately, and the piles should be constructed separately.

[0038] (2) The permanent or temporary drainage system should be well done to ensure that the surface water does not flow into the pile foundation construction range.

[0039] (3) Before pile construction, the right side of the line and the slope surface of the pile top within the pile range should be cleared of sundries, soil and dangerous stones, and temporary protective net should be provided on the slope surface to ensure the safety of the construction personnel.

[0040] (4) The construction should be strictly in accordance with the construction sequence, and the pile of the pile board wall should be constructed separately, and simultaneous construction of the whole section is strictly prohibited. Before construction, the length of the pile setting section should be checked according to the site topography, and if it is found that the design drawing does not match the site topography, the design personnel should be notified in time for adjustment.

[0041] (5) Before pile construction, a pile construction operation platform should be temporarily filled at the abutment according to the pile position, and the platform width should not be less than 3m.

[0042] (6) During construction, various materials and construction equipment should be kept at a certain distance from the wellhead to prevent falling into the well and injuring people. A special person should be arranged to command on the well, and observation facilities should be set up before pile body construction, and a special person should be responsible for observation. If unfavorable safety conditions are found, the construction personnel should be notified in time to evacuate the site.

[0043] (7) In order to ensure the construction safety and quality of pile hole excavation, special attention should be paid to strengthening the support at the soil and stone layer change to ensure the quality of the hole.

[0044] (8) The cross-sectional size, center position and hole bottom elevation of the pile body must meet the engineering quality evaluation and acceptance standard. The construction error of the cross-sectional size of the pile can only be positive, not negative, and the thickness of the concrete protection layer of the main reinforcement should be ensured not less than the design thickness.

[0045] (9) When the pile hole is formed or the part above the ground is excavated, the mountain should be avoided to be disturbed, small machinery or manual excavation should be used, wind gun excavation should be mainly used, and local wind gun can be used, and blasting excavation is prohibited.

[0046] (10) During the process of hole excavation and prestressed tension, the deformation of the mountain should be closely monitored and observed, and necessary safety measures should be taken in time to ensure the safety of personnel and the main project.

[0047] (11) The welding of main reinforcement bars and the pouring of concrete must be carried out in strict accordance with the relevant construction technical specifications and operating procedures. The lap joints of vertical main reinforcement bars or other steel materials should be avoided at the soil-rock boundary, and the lap joints should be staggered.

[0048] (12) Excavated waste from pile wells shall not be piled up at will, but shall be transported to the waste disposal site in a timely manner to ensure construction safety.

[0049] (13) The maximum particle size of coarse aggregate in the pile body concrete shall not exceed 5cm. Construction shall be carried out continuously and no construction joint shall be formed.

[0050] (14) The concrete strength test shall comply with the requirements of the Code for Design of Concrete Structures (2015 Edition) (GB50010-2010), and the concrete specimen size shall be 15×15×15cm.

[0051] (15) Concrete samples should be taken during the pile body concrete pouring process to make concrete test blocks, every shift, every 100m. 3 Alternatively, at least one sample should be taken for every 100 pans stirred.

[0052] (16) The concrete curing period should be more than 7 days. For the reinforcement piles exposed on the ground surface, a special person should be assigned to cover them with burlap sacks or straw mats and water them for curing.

[0053] 17) Reinforcement piles are concealed works; therefore, all construction and inspection records should be kept during construction. Any malfunctions and their handling should be recorded and filed.

[0054] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.

Claims

1. A circular pile retaining wall structure, characterized in that: It includes multiple round piles (1), and a cast-in-place retaining plate (2) is set between two adjacent round piles (1); The thickness of the cast-in-place retaining plate (2) is half the diameter of the round pile (1). The rear facade of the cast-in-place retaining plate (2) is located at the center line connecting the two round piles (1), and the front facade of the cast-in-place retaining plate (2) is located on the open side of the round pile (1). The cast-in-place retaining slab (2) is provided with trapezoidal stirrups inside, and the longitudinal main reinforcing bars are set inside the stirrups. The trapezoidal stirrups are provided with horizontal and vertical distributed reinforcing bars inside.

2. The circular pile retaining wall structure according to claim 1, characterized in that: A capping beam (3) is provided at the top of the circular pile (1).

3. The circular pile retaining wall structure according to claim 2, characterized in that: The crown beam (3) has an eagle beak set on the outer side of its bottom.

4. The circular pile retaining wall structure according to claim 3, characterized in that: The crown beam (3) is provided with an expansion joint every 10m or so, and the joint is filled with asphalt hemp rope with a depth of not less than 0.2m along the inner, outer and top sides.

5. A circular pile retaining wall structure according to claim 4, characterized in that: The cap beam (3) is provided with rectangular circumferentially distributed steel bars and longitudinal main reinforcing bars.

6. A circular pile retaining wall structure according to claim 5, characterized in that: A pebble filter layer is installed behind the cast-in-place retaining wall (2).

7. A circular pile retaining wall structure according to claim 6, characterized in that: The circular pile (1) is reinforced by two hoops to strengthen the structure. The longitudinal main reinforcement is placed inside the two hoops and fixed by two transverse distribution bars and two vertical distribution bars.

8. A circular pile retaining wall structure according to claim 7, characterized in that: The cast-in-place retaining wall (2) has a 0.1m φ PVC drainage hole pre-embedded every 1m vertically, and the opening of the PVC pipe of the drainage hole is wrapped with geotextile.

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