Manual hole digging pile side slope supporting and retaining structure

Abstract

The utility model provides a manual hole digging pile side slope retaining structure which comprises a plurality of pile bodies, the pile bodies are arranged at intervals in the length direction of a side slope, the bottoms of the pile bodies extend to the position below a side slope toe, holes are formed in the pile bodies in a manual hole digging mode, retaining walls are arranged in the holes, the retaining walls comprise a plurality of retaining wall units from top to bottom, and the retaining wall units are arranged in the retaining wall units. Every two adjacent retaining wall units are connected in an inserted mode, a top beam is arranged at the tops of the pile bodies, the pile bodies are connected into a whole through the top beams, a surface layer is arranged on the sides, away from the slope, of the pile bodies, and the surface layer is connected with the pile bodies through short ribs. The structure is small in construction working face, mature in technology, low in manufacturing cost and suitable for clay, rock and other soil layers with good stability, and the slope excavation depth does not exceed 8 m.

Description

Technical Field

[0001] The utility model relates to the technical field of slope support, in particular to a manual bored pile slope retaining structure. Background Art

[0002] In urban road construction projects, existing buildings outside the road red line often form road cutting slopes due to deep excavation of the roadbed, which affects the safety of existing houses on the top of the slope. Some projects cannot be demolished due to objective reasons, and slope support measures need to be taken to ensure the safety of existing houses. Generally, bored cast-in-place pile support structures are often used, but this type of structure requires large construction machinery and a certain construction platform to implement, and cannot be used when site conditions are limited.

[0003] The Chinese utility model patent with the authorization announcement number CN212561606U discloses a pile retaining wall with a permanent retaining structure, which uses bored cast-in-place piles as a permanent retaining structure. Although the solution is simple to construct and has a wide range of applications, the bored cast-in-place pile construction machinery is large in size and requires a large construction platform, which is not suitable for situations where the construction site is limited. Utility Model Content

[0004] The purpose of the utility model is to provide a manual bored pile slope retaining structure in view of the defects of the prior art. The utility model has a small construction area, mature technology, and low cost. It is suitable for soil layers such as clay and rock with good stability, and the slope excavation depth does not exceed 8m.

[0005] In order to solve the above technical problems, the utility model provides a bored pile slope supporting structure, comprising a plurality of pile bodies, wherein the plurality of pile bodies are arranged at intervals along the length direction of the slope, the bottom of the pile body extends below the foot of the slope, the pile body is formed by manually digging holes, a protective wall is arranged in the hole, the protective wall comprises a plurality of sections of protective wall units from top to bottom, two adjacent sections of protective wall units are plugged in, a crown beam is arranged on the top of the pile body, the crown beam connects the plurality of pile bodies into one, a surface layer is arranged on the side of the pile body away from the slope, and the surface layer is connected to the pile body through short reinforcement.

[0006] The utility model can excavate the soil from top to bottom section by section to carry out the wall protection construction, and then carry out the pile construction after the wall protection construction is completed. The utility model has less disturbance to the slope and requires a small construction working surface. The pile body is constructed by skip excavation, with 1 to 2 holes at a time, and the hole construction can be carried out only after the concrete strength of the adjacent piles reaches 70% of the design strength.

[0007] Furthermore, a step is provided on the top of the wall protection unit, and the inner diameter of the wall protection unit gradually increases from top to bottom, so that two adjacent wall protection units can be plugged in through the step.

[0008] The wall protection unit of the utility model is provided with steps, so that the plugging and connection of two adjacent wall protection units is facilitated, and the integrity of the wall protection can be enhanced.

[0009] Furthermore, the longitudinal reinforcement of the pile body extends into the crown beam, so that the pile body and the crown beam are connected as one.

[0010] The utility model improves the integrity of the pile body and the crown beam and improves the force bearing performance of the entire structure by extending the longitudinal reinforcement of the pile body into the crown beam.

[0011] Furthermore, the top of the crown beam is flush with the top of the slope, and a guardrail is provided on the top of the crown beam.

[0012] The utility model prevents people from falling from the top of the slope by arranging guardrails.

[0013] Furthermore, the bottom of the surface layer extends to 0.1 m below the road surface.

[0014] Furthermore, a plurality of drainage holes are provided on the bored pile slope retaining structure, and the drainage holes are arranged to be inclined downward.

[0015] Furthermore, a PVC-U pipe with a diameter of 0.075m is arranged in the drainage hole, the drainage hole is arranged between two adjacent piles, the drainage holes are evenly arranged at different heights, and an anti-filter layer is provided at one end of the drainage hole buried in the slope soil.

[0016] The utility model can discharge water in the soil in the slope by arranging a plurality of drainage holes, which is beneficial to the stability of the slope.

[0017] The beneficial effects of the utility model are as follows: the utility model has a small construction operation surface, mature technology, and low cost, and is suitable for soil layers such as clay and rock with good stability, and the excavation depth of the slope does not exceed 8m. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the utility model wall protection;

[0020] Figure 3 It is a cross-sectional view of the utility model.

[0021] Figure numerals: retaining wall 1; pile body 2; cap beam 3; short reinforcement 4; surface layer 5; drainage hole 6; step 7. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] like Figure 1 As shown, this embodiment provides a manual bored pile slope retaining structure, including a pile body 2, a retaining wall 1, a crown beam 3, and a surface layer 5. A plurality of pile bodies 2 are arranged at intervals along the length direction of the slope. The bottom of the pile body 2 extends to a certain depth below the foot of the slope. The depth needs to be calculated and determined according to geological conditions. The pile body 2 is formed by manual digging. A retaining wall 1 is arranged in the hole. The retaining wall 1 is coaxially arranged with the pile body 2. The function of the retaining wall 1 is to ensure the stability of the hole. Figure 2 As shown, the protective wall 1 includes multiple sections of protective wall units from top to bottom, and a step 7 is set at the top of the protective wall unit. The inner diameter of the protective wall unit gradually increases from top to bottom, so that two adjacent protective wall units can be plugged in through the step 7, thereby enhancing the integrity of the protective wall 1. In this embodiment, the wall thickness of the upper end of the protective wall unit is 0.15m, the wall thickness of the lower end is 0.1m, and the height of the step 7 is 0.05m.

[0024] like Figure 1 As shown, a crown beam 3 is arranged on the top of the pile body 2, and the crown beam 3 connects the multiple pile bodies 2 as a whole. The longitudinal reinforcement of the pile body 2 extends into the crown beam 3, so that the pile body 2 and the crown beam 3 are connected as a whole, thereby improving the stress bearing performance of the entire structure. The top of the crown beam 3 is flush with the top of the slope, and a guardrail is arranged on the top of the crown beam 3.

[0025] like Figure 1 , 3 As shown, a surface layer 5 is provided on the side of the pile body 2 away from the slope, and the surface layer 5 is connected to the pile body 2 through short bars 4. The bottom of the surface layer 5 extends to 0.1m below the road surface. A plurality of drainage holes 6 are provided on the present artificial bored pile slope retaining structure, and a PVC-U pipe with a diameter of 0.075m is provided in the drainage holes 6. The drainage holes 6 are arranged to be inclined downward, and the drainage holes 6 are arranged between two adjacent pile bodies 2. In this embodiment, a drainage hole 6 is arranged every two pile bodies 2. The drainage holes 6 are arranged to be inclined downward, with a slope of 5%, and are evenly arranged at different heights with a vertical spacing of 2m. A filter layer is provided at one end of the drainage hole 6 buried in the slope soil.

[0026] The construction method of the artificial bored pile slope retaining structure is:

[0027] Step 1: Level the site, measure and lay out the lines, and determine the center coordinates of the bored piles.

[0028] Step 2: Excavate the first section of earthwork, install steel bars, and cast the first section of retaining wall 1. Set up a vertical transport frame, and install safety facilities such as guardrails, lighting, and ventilation. Then, construct from top to bottom, and after the concrete of the previous section of retaining wall 1 has a certain strength, excavate the earthwork of the next section of retaining wall 1, and construct the next section of retaining wall 1. Repeat the above process until the excavation reaches the designed elevation of the pile bottom.

[0029] Step 3: hoist the steel cage of the pile body 2 into the pile hole and pour concrete. The pile body 2 is constructed by skipping, with 1 to 2 holes at a time, and the hole construction can be carried out only after the concrete strength of the adjacent piles reaches 70% of the design strength.

[0030] Step 4: After all pile bodies 2 are constructed according to the above principles, the crown beam 3 at the top of the pile is constructed. The steel bars at the top of the pile body 2 are anchored into the crown beam 3. The top of the pile body 2 is anchored into the crown beam 0.1m, the steel bars of the crown beam 3 are tied, the formwork is supported, and the concrete is poured.

[0031] Step 5: After the strength of the pile body 2 meets the design requirements, the soil in front of the pile is excavated to the bottom of the roadbed, and then the reinforced concrete surface layer 5 and the drainage hole 6 are constructed.

[0032] The utility model is suitable for clay, rock and other soil layers with good stability, and the excavation depth of the slope does not exceed 8m. The utility model adopts artificial bored piles, which has the advantages of small construction working area, mature technology and low cost.

[0033] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A bored pile slope retaining structure, characterized in that: The invention comprises a plurality of pile bodies (2), wherein the plurality of pile bodies (2) are arranged at intervals along the length direction of the slope, the bottom of the pile body (2) extends below the foot of the slope, the pile body (2) is formed by manually digging a hole, a protective wall (1) is arranged in the hole, the protective wall (1) comprises a plurality of sections of protective wall units from top to bottom, two adjacent sections of protective wall units are plugged together, a crown beam (3) is arranged on the top of the pile body (2), the crown beam (3) connects the plurality of pile bodies (2) into one, a surface layer (5) is arranged on the side of the pile body (2) away from the slope, and the surface layer (5) is connected to the pile body (2) through short reinforcement (4).

2. The artificial bored pile slope retaining structure according to claim 1 is characterized in that: A step (7) is arranged on the top of the wall protection unit, and the inner diameter of the wall protection unit gradually increases from top to bottom, so that two adjacent wall protection units can be plugged in via the step (7).

3. The artificial bored pile slope retaining structure according to claim 1 is characterized in that: The longitudinal reinforcement of the pile body (2) extends into the crown beam (3), so that the pile body (2) and the crown beam (3) are connected as one.

4. The artificial bored pile slope retaining structure according to claim 1 is characterized in that: The top of the crown beam (3) is flush with the top of the slope, and a guardrail is arranged on the top of the crown beam (3).

5. The artificial bored pile slope retaining structure according to claim 1 is characterized in that: The bottom of the surface layer (5) extends to 0.1 m below the road surface.

6. The artificial bored pile slope retaining structure according to any one of claims 1 to 5, characterized in that: A plurality of drainage holes (6) are provided on the artificial bored pile slope retaining structure. The drainage holes (6) are arranged to be inclined downward. A PVC-U pipe with a diameter of 0.075 m is arranged in the drainage holes (6). The drainage holes (6) are arranged between two adjacent pile bodies (2). The drainage holes (6) are evenly arranged at different heights.

7. The artificial bored pile slope retaining structure according to claim 6 is characterized in that: An inverted filter layer is provided at one end of the drainage hole (6) buried in the slope soil, and the drainage hole (6) is used to discharge water in the slope soil.

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