Construction method of high-level casing interlocking working platform at the borehole opening of full-casing cast-in-place pile

Abstract

This invention relates to the technical field of work platforms and discloses a construction method for a high-level casing interlocking work platform for cast-in-place pile boreholes with full casing wall protection. The method includes the following construction steps: 1) A casing is inserted into the cast-in-place pile borehole; 2) The work platform includes a frame, with a downward-facing recess in the middle forming a top-opening recessed area. A hollow section is provided in the middle of the recessed area, and a fixedly arranged installation cylinder is located within the hollow section. The installation cylinder has a through cavity, and an annular plate is provided at the top of the installation cylinder. The recessed area has a lower operating platform, and the frame has an upper operating platform. The work platform is lifted to the top of the pile borehole section, and the top of the casing is inserted into the cylinder cavity from bottom to top until the top of the casing abuts against the annular plate; 3) A reinforcing cage is lowered into the cast-in-place pile borehole; 4) A grouting bucket is placed on top of the installation cylinder, and the grouting bucket is connected to a grouting conduit; 5) Concrete is poured using the hoisting bucket; 6) The grouting conduit and grouting bucket are removed, and the work platform is lifted and moved; 7) The casing is pulled out of the cast-in-place pile borehole.

Description

Technical Field

[0001] This invention patent relates to the technical field of work platforms, and more specifically, to a construction method for a high-level casing interlocking work platform for full-casing wall cast-in-place pile boreholes. Background Technology

[0002] Full casing wall drilling is a common method for pile foundation construction. During construction, a full casing adapted to the pile diameter is used. The full casing is drilled into the soil by methods such as spinning, vibration, and static pressure. After reaching the bearing layer, a steel cage is suspended inside the full casing, and pile body concrete is poured.

[0003] In existing technologies, the common construction method during concrete pouring is to hoist a fixed pouring platform to the top of the casing borehole and pour concrete from there. However, due to significant undulations in the bearing stratum, the top elevation of the casing can easily become inconsistent, making the fixed pouring platform unsuitable for all borehole pouring operations. Furthermore, workers often have to stand at heights with inadequate safety measures during concrete pouring, posing a significant safety hazard. In addition, directly cutting the casing or fabricating multiple fixed pouring platforms of different sizes would result in material waste and time loss. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for a high-level casing interlocking working platform for cast-in-place pile boreholes with full casing wall protection. This method aims to solve the problem in the prior art where, due to the large undulations of the bearing stratum, the top elevation of the full casing is easily inconsistent, making it impossible for fixed grouting platforms to be suitable for grouting operations at all pile boreholes.

[0005] This invention is implemented as follows: a construction method for a high-level casing interlocking working platform at the borehole opening of a full-casing cast-in-place pile includes the following construction steps:

[0006] 1) After the final acceptance of the cast-in-place pile hole, a casing is inserted into the cast-in-place pile hole. The bottom of the casing abuts against the bearing layer, and the casing extends upward to form a pile hole section extending above the cast-in-place pile hole.

[0007] 2) Provide a work platform, the work platform including a frame, the middle of the frame is recessed downward to form a recessed area with an open top, the middle of the recessed area is provided with a hollowed-out position that runs vertically through, the hollowed-out position is provided with a mounting cylinder, and the mounting cylinder is fixedly connected to the frame.

[0008] The mounting cylinder has a through cavity running vertically through it. The top of the mounting cylinder is provided with an annular plate. The outer circumference of the annular plate is connected to the top of the mounting cylinder, and the inner circumference of the annular plate extends toward the center of the through cavity.

[0009] The recessed area has a lower operating platform surrounding the outer periphery of the vent, and the frame has an upper operating platform surrounding the outer periphery of the recessed area. The upper operating platform is located above the lower operating platform and extends outwards from the lower operating platform.

[0010] The working platform is lifted to a position above the pile hole section, and the top of the pile hole section is inserted into the cylinder from bottom to top until the top of the pile hole section abuts against the annular plate, and the working platform is relatively fixed on the pile hole section.

[0011] 3) Lift the reinforcing cage and lower it into the bored pile hole;

[0012] 4) Insert the grouting guide pipe into the grouting pile hole, and place the grouting bucket on top of the installation cylinder, with the grouting bucket connected to the grouting guide pipe;

[0013] 5) The bucket containing concrete is lifted to the top of the pouring bucket. The bottom of the bucket has a discharge port. The discharge port is opened, and the concrete is poured into the pile hole through the pouring bucket and the pouring pipe until the concrete is poured to the set height.

[0014] 6) After removing the grouting conduit and grouting bucket, lift the working platform off the pile hole section;

[0015] 7) Pull the casing out of the grouting pile hole.

[0016] Optionally, in construction step 2), an outer perimeter fence is provided on the outer perimeter of the top of the frame, and the outer perimeter fence is arranged around the outer perimeter of the frame.

[0017] Optionally, in construction step 3), the reinforcing cage is provided with multiple concrete blocks, which are arranged at equal intervals along the circumference of the reinforcing cage; the reinforcing cage is lowered into the grouting pile hole at a speed lower than the set speed until the reinforcing cage is lowered to the set position, and then the reinforcing cage is fixed relatively.

[0018] Optionally, in construction step 5), the outer periphery of the bucket is provided with multiple fixing strips, and the multiple fixing strips are arranged at equal intervals along the circumference of the bucket; the top of the fixing strips extends to the top of the bucket to form a top section, and slings are connected to the top section;

[0019] Using a crane connected to multiple slings, the bucket is lifted horizontally above the filling bucket, while keeping the discharge port vertically aligned with the filling bucket.

[0020] Optionally, in construction step 5), the bottom of the fixing strip extends to below the discharge port to form a bottom section; each fixing strip is connected to an inclined strip, the lower end of the inclined strip is connected to the bottom section, the upper end of the inclined strip is connected to the outer periphery of the bucket and located above the discharge port, and the inclined strip is arranged inclined upwards along the upward extension direction of the inclined strip.

[0021] Optionally, the inclined strip has multiple positioning strips extending downward from its center, and the multiple positioning strips are arranged at equal intervals around each other to form a positioning area, and a downward-facing positioning step is formed in the center of each positioning strip.

[0022] In construction step 5), after the hoisting bucket is positioned above the grouting bucket, the upper part of the grouting bucket is embedded in the positioning area, and the positioning step abuts against the top of the grouting bucket, thereby fixing the grouting bucket and the hoisting bucket relative to each other.

[0023] Optionally, in construction step 2), the lower part of the mounting cylinder extends below the recessed area to form a lower section, and the upper end of the mounting cylinder extends above the recessed area to form an upper section, with the annular plate disposed on the top of the upper section;

[0024] The inner wall of the mounting cylinder is provided with a plurality of positioning plates, which are arranged at intervals along the circumference of the mounting cylinder; the top of the positioning plate is abutted against the bottom of the annular plate, and the outer side of the positioning plate is abutted against the inner wall of the mounting cylinder.

[0025] In construction step 2), after the pile hole section is inserted into the cylinder cavity, the inner sides of the plurality of positioning plates abut against the outer periphery of the pile hole section.

[0026] Optionally, the frame includes multiple transverse bars and multiple longitudinal bars, with the transverse bars and longitudinal bars connected in both directions; there is a connection point between the longitudinal bars and the transverse bars, and a reinforcing plate is provided at the connection point. The reinforcing plate is triangular in shape, with one side of the reinforcing plate connected to the transverse bar and the other side of the reinforcing plate connected to the longitudinal bar.

[0027] Optionally, a positioning wall is formed on the inner side of the positioning plate, the upper part of the positioning wall is arranged longitudinally, and the lower part of the positioning wall is arranged inclined outward away from the pile hole section to form an inclined wall; side walls are formed on both sides of the positioning plate, and elastic blocks are connected to the side walls. The inner side of the elastic block is fixedly connected to the side wall, and an elastic inclined surface is formed on the outer side of the elastic block. Along the direction towards the pile hole section, the elastic inclined surface is arranged inclined towards the positioning plate.

[0028] The elastic block has an elastic wall facing the same direction as the positioning wall. The elastic wall is arranged in an arc shape. One end of the elastic wall is connected to the side wall and is offset from the positioning wall, with a gap and misalignment. The other end of the elastic wall is connected to the end of the elastic inclined surface. The elastic block is provided with multiple radial holes. The inner end of the radial holes penetrates the elastic wall to form an adsorption opening. The outer end of the radial holes is arranged away from the radial extension of the pile hole section and is arranged in a closed manner.

[0029] In construction step 2), after the pile hole section is inserted into the cylinder cavity, the positioning wall and the elastic wall respectively abut against the outer periphery of the pile hole section, the elastic block is squeezed away from the pile hole section and compressed and deformed, and the adsorption opening is adsorbed on the outer periphery of the pile hole section.

[0030] Optionally, the positioning plate is provided with a cylindrical groove, the cylindrical groove is arranged longitudinally, the inner side of the cylindrical groove penetrates the positioning wall to form an inner opening, the upper and lower ends of the cylindrical groove are respectively closed, and the outer side of the cylindrical groove is recessed away from the pile hole section to form an empty groove.

[0031] The cylindrical groove is provided with an elastic column that is arranged longitudinally and rotatably and is made of elastic material. The inner side of the elastic column passes through the inner opening and protrudes toward the pile hole section to form an inner convex part. The outer side of the elastic column is arranged toward the empty groove.

[0032] In construction step 2), after the pile hole section is inserted into the cylinder cavity, the inner convex part abuts against the outer periphery of the pile hole section and is compressed and deformed towards the columnar groove by the pressure of the pile hole section until the positioning wall abuts against the outer periphery of the pile hole section. After being squeezed, the elastic column is compressed and embedded towards the empty groove.

[0033] Compared with existing technologies ， The present invention provides a construction method for a high-level casing interlocking working platform for cast-in-place pile boreholes. Through the design of the installation cylinder, the top of the casing is embedded in the cylinder cavity, and the top of the casing is supported and abutted against the bottom of the annular plate from bottom to top, thereby fixing the working platform and the casing together. Concrete is then poured through the upper and lower operating platforms. In this way, the overall operation is simple, not affected by the elevation of the top of the casing, can be reused, and ensures construction safety. Attached Figure Description

[0034] Figure 1 This is a construction diagram of the construction method of the high-level casing interlocking operation platform at the borehole opening of the full casing wall grouting pile provided by the present invention;

[0035] Figure 2 This is a three-dimensional schematic diagram of the working platform provided by the present invention;

[0036] Figure 3 This is a construction diagram of step 2) provided by the present invention;

[0037] Figure 4 This is a construction diagram of step 4) provided by the present invention;

[0038] Figure 5 This is a construction diagram illustrating the lifting of the bucket in step 5) of the present invention;

[0039] Figure 6 This is a three-dimensional schematic diagram of the hoisting bucket provided by the present invention;

[0040] Figure 7 This is a cross-sectional schematic diagram of the hoisting bucket provided by the present invention;

[0041] Figure 8 This is a schematic diagram showing the connection of the mounting cylinder, annular plate, positioning plate, and sleeve provided by the present invention.

[0042] Figure 9 This invention provides Figure 2 Enlarged view of point A in the middle;

[0043] Figure 10 This is a cross-sectional schematic diagram of the positioning plate provided by the present invention;

[0044] Figure 11 This is a cross-sectional schematic diagram of the positioning plate provided by the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0047] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0048] Reference Figure 1-11 The image shows a preferred embodiment of the present invention.

[0049] The construction method of the high-level casing interlocking working platform at the borehole opening of the full casing wall cast-in-place pile provided by the present invention includes the following construction steps:

[0050] 1) After the final acceptance of the cast-in-place pile hole, a casing 100 is inserted into the cast-in-place pile hole. The bottom of the casing 100 abuts against the bearing layer, and the casing 100 extends upward to form a pile hole section extending above the cast-in-place pile hole.

[0051] 2) Provide a work platform 200, which includes a frame. The middle part of the frame is recessed downward to form a recessed area 201 with an open top. The middle part of the recessed area 201 has a hollowed-out section that runs vertically through it. An installation cylinder 300 is provided in the hollowed-out section and is fixedly connected to the frame.

[0052] The mounting cylinder 300 has a through cavity running vertically through the top and bottom. The top of the mounting cylinder 300 is provided with an annular plate 310. The outer circumference of the annular plate 310 is connected to the top of the mounting cylinder 300, and the inner circumference of the annular plate 310 extends toward the center of the through cavity.

[0053] The recessed area 201 has a lower operating platform 210 surrounding the periphery of the vacancy, and the frame has an upper operating platform 220 surrounding the periphery of the recessed area 201. The upper operating platform 220 is located above the lower operating platform 210 and extends outwards from the lower operating platform 210.

[0054] The lifting platform 200 is placed above the pile hole section, and the top of the pile hole section is inserted into the cylinder from bottom to top until the top of the pile hole section abuts against the annular plate 310, and the lifting platform 200 is relatively fixed on the pile hole section.

[0055] 3) Lift the steel reinforcement cage and lower it into the bored pile hole;

[0056] 4) Insert the grouting guide pipe into the grouting pile hole, and place the grouting bucket 400 on top of the installation cylinder 300. The grouting bucket 400 is connected to the grouting guide pipe.

[0057] 5) The bucket 500 containing concrete is lifted above the pouring bucket 400. The bottom of the bucket 500 has a discharge port. Open the discharge port and the concrete is poured into the pile hole through the pouring bucket 400 and the pouring pipe until the concrete is poured to the set height.

[0058] 6) After removing the grouting pipe and grouting bucket 400, lift the working platform 200 off the pile hole section;

[0059] 7) Pull out the casing 100 from the grouting pile hole.

[0060] The above-mentioned construction method of the high-level casing 100 interlocking working platform 200 at the borehole opening of the full casing 100 retaining wall cast-in-place pile, through the design of the installation cylinder 300, the top of the casing 100 is embedded in the cylinder cavity, and the top of the casing 100 is supported and abutted against the bottom of the annular plate 310 from bottom to top, so that the working platform 200 and the casing 100 are fixed to each other, and the construction and concrete pouring are operated through the upper operating platform 220 and the lower operating platform 210. In this way, the overall operation is simple, not affected by the top elevation of the casing 100, can be reused, and at the same time, construction safety is guaranteed.

[0061] In construction step 2), an outer perimeter fence is installed around the top of the scaffold, which is arranged around the outer perimeter of the scaffold. This ensures the safety of construction personnel standing on the upper operating platform 220.

[0062] In construction step 3), multiple concrete blocks are placed on the reinforcing cage, and these blocks are arranged at equal intervals along the circumference of the cage. The reinforcing cage is lowered into the pile hole at a speed lower than the set value until it reaches the set position, at which point it is fixed in place. Thus, to ensure the thickness of the protective layer for the main reinforcement, concrete protective blocks are placed at intervals around each perimeter of the reinforcing cage.

[0063] In construction step 5), multiple fixing bars 510 are provided on the outer periphery of the bucket 500. The multiple fixing bars 510 are arranged at equal intervals along the circumference of the bucket 500. The top of the fixing bars 510 extends to the top of the bucket 500 to form a top section, and slings are connected to the top section.

[0064] Using a crane connected to multiple slings, the bucket 500 is horizontally hoisted above the pouring bucket 400, ensuring the discharge port is vertically aligned with the pouring bucket 400. This facilitates the rapid lifting of the bucket 500 onto the pouring bucket 400 for concrete pouring.

[0065] In this embodiment, in construction step 5), the bottom of the fixing strip 510 extends to below the discharge port, forming a bottom section; each fixing strip 510 is connected to an inclined strip 520, the lower end of the inclined strip 520 abuts against the bottom section, and the upper end of the inclined strip 520 abuts against the outer periphery of the bucket 500 and is located above the discharge port. Along the upward extension direction of the inclined strip 520, the inclined strip 520 is arranged inclined upwards. In this way, the design of the inclined strip 520 fixes the fixing strip 510 and the bucket 500 together, facilitating the positioning of the discharge port.

[0066] In a preferred embodiment, a plurality of positioning strips 530 extend downward from the middle of the inclined strip 520. The plurality of positioning strips 530 are arranged at equal intervals around each other to form a positioning area. A positioning step 531 is formed downward in the middle of the positioning strip 530.

[0067] In construction step 5), after the hoisting bucket 500 is positioned above the pouring bucket 400, the upper part of the pouring bucket 400 is embedded in the positioning area, and the positioning step 531 abuts against the top of the pouring bucket 400 downwards, fixing the pouring bucket 400 and the hoisting bucket 500 relative to each other. The positioning step 531 presses against the top of the pouring bucket 400, making the overall structure more stable and facilitating pouring.

[0068] In construction step 2), the lower part of the mounting cylinder 300 extends below the recessed area 201 to form a lower section, and the upper end of the mounting cylinder 300 extends above the recessed area 201 to form an upper section. The annular plate 310 is set on the top of the upper section.

[0069] The inner wall of the mounting cylinder 300 is provided with a plurality of positioning plates 320, which are arranged at intervals along the circumference of the mounting cylinder 300; the top of the positioning plate 320 is connected to the bottom of the annular plate 310, and the outer side of the positioning plate 320 is connected to the inner wall of the mounting cylinder 300.

[0070] In construction step 2), after the pile hole section is inserted into the cylinder cavity, the inner sides of multiple positioning plates 320 abut against the outer periphery of the pile hole section. In this way, the positioning plates 320 serve to fix the sleeve and reinforce the annular plate 310, making the connection between the annular plate 310 and the mounting cylinder 300 more stable.

[0071] The frame includes multiple transverse bars 232 and multiple longitudinal bars 231, with the transverse bars 232 and longitudinal bars 231 connected in both directions. There are connection points between the longitudinal bars 231 and the transverse bars 232, and reinforcing plates 233 are provided at these connection points. The reinforcing plates 233 are triangular in shape, with one side connected to a transverse bar 232 and the other side connected to a longitudinal bar 231. In this way, the reinforcing plates 233 increase the rigidity and overall integrity of the work platform 200.

[0072] In this embodiment, a positioning wall 321 is formed on the inner side of the positioning plate 320. The upper part of the positioning wall 321 is arranged longitudinally, and the lower part of the positioning wall 321 is arranged inclined outward away from the pile hole section to form an inclined wall. Side walls 322 are formed on both sides of the positioning plate 320. An elastic block 330 is connected to the side wall 322. The inner side of the elastic block 330 is fixedly connected to the side wall 322. An elastic inclined surface 331 is formed on the outer side of the elastic block 330. Along the direction towards the pile hole section, the elastic inclined surface 331 is arranged inclined towards the positioning plate 320.

[0073] The elastic block 330 has an elastic wall 332 facing the same direction as the positioning wall 321. The elastic wall 332 is arranged in an arc shape. One end of the elastic wall 332 is connected to the side wall 322 and is offset from the positioning wall 321, and is spaced apart from the positioning wall 321. The other end of the elastic wall 332 is connected to the end of the elastic inclined surface 331. The elastic block 330 is provided with multiple radial holes. The inner end of the radial holes penetrates the elastic wall 332 to form an adsorption opening 3320. The outer end of the radial holes is arranged away from the radial extension of the pile hole section and is arranged in a closed manner.

[0074] In construction step 2), after the pile hole section is inserted into the cylinder cavity, the positioning wall 321 and the elastic wall 332 abut against the outer periphery of the pile hole section, respectively. The elastic block 330 is squeezed away from the pile hole section and deformed, and the adsorption opening 3320 adsorbs onto the outer periphery of the pile hole section. In this way, through the deformation of the elastic block 330 under force, the sleeve 100 is elastically clamped by multiple elastic blocks 330 under the action of elastic force. At the same time, when the elastic block 330 abuts against the wall of the sleeve 100, a sealed space is formed in the adsorption opening 3320. After the elastic block 330 is deformed under force, the sealed space in the adsorption opening 3320 deforms, creating an air pressure difference between the inside and outside. The air pressure difference causes the adsorption opening 3320 to adsorb onto the outer periphery of the sleeve 100, further fixing the sleeve 100.

[0075] In this embodiment, the positioning plate 320 is provided with a cylindrical groove 3200, which is arranged longitudinally. The inner side of the cylindrical groove 3200 penetrates the positioning wall 321 to form an inner opening. The upper and lower ends of the cylindrical groove 3200 are respectively closed. The outer side of the cylindrical groove 3200 is recessed away from the pile hole section to form an empty groove 3201.

[0076] The cylindrical groove 3200 is provided with an elastic column 340 that is longitudinally and rotatably arranged and made of elastic material. The inner side of the elastic column 340 passes through the inner opening and protrudes toward the pile hole section to form an inner protrusion. The outer side of the elastic column 340 is arranged toward the empty groove 3201.

[0077] In construction step 2), after the pile hole section is inserted into the cylinder cavity, the inner convex part abuts against the outer periphery of the pile hole section and is compressed and deformed towards the cylindrical groove 3200 by the pressure of the pile hole section until the positioning wall 321 abuts against the outer periphery of the pile hole section. After being squeezed, the elastic column 340 is compressed and embedded towards the empty groove 3201. In this way, the reserved empty groove 3201 provides deformation space for the elastic column 340. At the same time, since the elastic column 340 is rotatable, after the outer periphery of the sleeve 100 abuts against the elastic column 340, the working platform 200 can still be finely adjusted and rotated by rotating the elastic column 340. In this way, the elastic column 340 elastically clamps the sleeve 100, making the working platform 200 more stably placed on the sleeve.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction method for a high-level casing interlocking working platform at the borehole opening of a full-casing cast-in-place pile, characterized in that... The construction steps include the following: 1) After the final acceptance of the cast-in-place pile hole, a casing is inserted into the cast-in-place pile hole. The bottom of the casing abuts against the bearing layer, and the casing extends upward to form a pile hole section extending above the cast-in-place pile hole. 2) Provide a work platform, the work platform including a frame, the middle of the frame is recessed downward to form a recessed area with an open top, the middle of the recessed area is provided with a hollowed-out position that runs vertically through, the hollowed-out position is provided with a mounting cylinder, and the mounting cylinder is fixedly connected to the frame. The mounting cylinder has a through cavity running vertically through it. The top of the mounting cylinder is provided with an annular plate. The outer circumference of the annular plate is connected to the top of the mounting cylinder, and the inner circumference of the annular plate extends toward the center of the through cavity. The recessed area has a lower operating platform surrounding the outer periphery of the hollowed-out area, and the frame has an upper operating platform surrounding the outer periphery of the recessed area. The upper operating platform is located above the lower operating platform and extends outwards away from the lower operating platform. The working platform is lifted to a position above the pile hole section, and the top of the pile hole section is inserted into the cylinder from bottom to top until the top of the pile hole section abuts against the annular plate, and the working platform is relatively fixed on the pile hole section. 3) Lift the reinforcing cage and lower it into the bored pile hole; 4) Insert the grouting guide pipe into the grouting pile hole, and place the grouting bucket on top of the installation cylinder, with the grouting bucket connected to the grouting guide pipe; 5) The bucket containing concrete is lifted to the top of the pouring bucket. The bottom of the bucket has a discharge port. The discharge port is opened, and the concrete is poured into the pile hole through the pouring bucket and the pouring pipe until the concrete is poured to the set height. 6) After removing the grouting conduit and grouting bucket, lift the working platform off the pile hole section; 7) Pull the casing out of the grouting pile hole.

2. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 1, characterized in that, In construction step 2), an outer perimeter fence is provided on the outer perimeter of the top of the frame, and the outer perimeter fence is arranged around the outer perimeter of the frame.

3. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 1, characterized in that, In construction step 3), the reinforcing cage is provided with multiple concrete blocks, which are arranged at equal intervals along the circumference of the reinforcing cage; the reinforcing cage is lowered into the grouting pile hole at a speed lower than the set speed until the reinforcing cage is lowered to the set position, and then the reinforcing cage is fixed relatively.

4. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 1, characterized in that, In construction step 5), the outer periphery of the bucket is provided with multiple fixing strips, which are arranged at equal intervals along the circumference of the bucket; the top of the fixing strips extends to the top of the bucket to form a top section, and slings are connected to the top section. Using a crane connected to multiple slings, the bucket is lifted horizontally above the filling bucket, while keeping the discharge port vertically aligned with the filling bucket.

5. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 4, characterized in that, In construction step 5), the bottom of the fixing strip extends to the bottom of the discharge port to form a bottom section; each fixing strip is connected to an inclined strip, the lower end of the inclined strip is connected to the bottom section, the upper end of the inclined strip is connected to the outer periphery of the bucket and located above the discharge port, and the inclined strip is arranged inclined upwards along the upward extension direction of the inclined strip.

6. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 5, characterized in that, The inclined strip has multiple positioning strips extending downward from its center. These positioning strips are arranged at equal intervals around each other to form a positioning area. The center of each positioning strip has a downward-facing positioning step. In construction step 5), after the hoisting bucket is positioned above the grouting bucket, the upper part of the grouting bucket is embedded in the positioning area, and the positioning step abuts against the top of the grouting bucket, thereby fixing the grouting bucket and the hoisting bucket relative to each other.

7. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in any one of claims 1 to 6, characterized in that, In construction step 2), the lower part of the mounting cylinder extends below the recessed area to form a lower section, and the upper end of the mounting cylinder extends above the recessed area to form an upper section. The annular plate is set on the top of the upper section. The inner wall of the mounting cylinder is provided with a plurality of positioning plates, which are arranged at intervals along the circumference of the mounting cylinder; the top of the positioning plate is abutted against the bottom of the annular plate, and the outer side of the positioning plate is abutted against the inner wall of the mounting cylinder. In construction step 2), after the pile hole section is inserted into the cylinder cavity, the inner sides of the plurality of positioning plates abut against the outer periphery of the pile hole section.

8. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 1, characterized in that, The frame includes multiple horizontal bars and multiple vertical bars, which are connected in both directions. There are connection points between the vertical bars and the horizontal bars, and a reinforcing plate is provided at the connection point. The reinforcing plate is triangular in shape, with one side connected to the horizontal bar and the other side connected to the vertical bar.

9. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 7, characterized in that, The positioning plate has a positioning wall formed on its inner side. The upper part of the positioning wall is arranged longitudinally, and the lower part of the positioning wall is arranged outward from the pile hole section to form an inclined wall. Side walls are formed on both sides of the positioning plate. Elastic blocks are connected to the side walls. The inner side of the elastic blocks is fixedly connected to the side walls. An elastic inclined surface is formed on the outer side of the elastic blocks. Along the direction towards the pile hole section, the elastic inclined surface is arranged inclined towards the positioning plate. The elastic block has an elastic wall facing the same direction as the positioning wall. The elastic wall is arranged in an arc shape. One end of the elastic wall is connected to the side wall and is offset from the positioning wall, with a gap and misalignment. The other end of the elastic wall is connected to the end of the elastic inclined surface. The elastic block is provided with multiple radial holes. The inner end of the radial holes penetrates the elastic wall to form an adsorption opening. The outer end of the radial holes is arranged away from the radial extension of the pile hole section and is arranged in a closed manner. In construction step 2), after the pile hole section is inserted into the cylinder, the positioning wall and the elastic wall abut against the outer periphery of the pile hole section, the elastic block is squeezed away from the pile hole section and compressed and deformed, and the adsorption opening is adsorbed on the outer periphery of the pile hole section.

10. The construction method of the high-level casing interlocking working platform at the borehole opening of the full-casing wall cast-in-place pile as described in claim 9, characterized in that, The positioning plate is provided with a cylindrical groove, which is arranged longitudinally. The inner side of the cylindrical groove penetrates the positioning wall to form an inner opening. The upper and lower ends of the cylindrical groove are respectively closed. The outer side of the cylindrical groove is recessed away from the pile hole section to form an empty groove. The cylindrical groove is provided with an elastic column that is arranged longitudinally and rotatably and is made of elastic material. The inner side of the elastic column passes through the inner opening and protrudes toward the pile hole section to form an inner convex part. The outer side of the elastic column is arranged toward the empty groove. In construction step 2), after the pile hole section is inserted into the cylinder cavity, the inner convex part abuts against the outer periphery of the pile hole section and is compressed and deformed towards the columnar groove by the pressure of the pile hole section until the positioning wall abuts against the outer periphery of the pile hole section. After being squeezed, the elastic column is compressed and embedded towards the empty groove.

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