Pile head over-chiseling treatment construction method

Abstract

The invention relates to a pile head over-chiseling treatment construction method which is used for ensuring the stable effect of anchoring a pile head into a bearing platform under the pile head over-chiseling condition, and the construction method comprises the following steps: S1, downwards excavating along the periphery of the pile head to form a construction groove; s2, concrete is poured in the construction groove to form an additional cushion layer; s3, an additional reinforcing mesh is laid on the additional cushion layer along the periphery of the pile head; s4, a bearing platform formwork is erected, and a bearing platform reinforcing mesh is arranged; s5, concrete is poured to the bearing platform reinforcing mesh and the additional reinforcing mesh at the same time; and S6, concrete consolidation is conducted, and construction is completed. The over-chiseled pile head is exposed in an excavation mode, so that the over-chiseled pile head has enough anchoring length, then the additional reinforcing mesh is placed to conduct concrete pouring together with the bearing platform reinforcing mesh, the overall effect of the pile head and the bearing platform formed after solidification can be ensured, the problem that the connection effect is poor due to traditional pile splicing is solved, and the construction efficiency is improved. And the connection quality of the pile head and the bearing platform can be furthest guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, in particular to a pile head over-chisel treatment construction method. Background Art

[0002] During the construction process, due to poor control of the elevation when chiseling the pile head, over-chiseling of the pile head often occurs.

[0003] The traditional pile connection method uses direct formwork to connect the piles, which cannot solve the technical problem of over-chiselling of the pile head. The connection effect between the concrete after the pile connection and the original pile foundation concrete is definitely not as good as the integrity of the original pile head concrete, and it is also impossible to ensure the overall stability of the pile head anchored into the pedestal or raft slab. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a method for over-chiselling pile head to solve the problem of poor overall stability of the pile head anchored into the pedestal in the prior art.

[0005] To achieve the above object, the present invention provides a pile head over-chisel treatment construction method, which is used to ensure the stability of the pile head anchored into the cap when the pile head is over-chiseled. The construction method comprises the following steps:

[0006] S1. Dig down along the periphery of the pile head to form a construction trench;

[0007] S2, pouring concrete in the construction trench to form an additional cushion layer;

[0008] S3. Lay additional steel mesh along the periphery of the pile head on the additional cushion layer;

[0009] S4. Support the foundation formwork and lay out the foundation reinforcement mesh;

[0010] S5. pouring concrete on the cap steel mesh and the additional steel mesh simultaneously;

[0011] S6. Concrete solidifies and construction is completed.

[0012] By adopting this technical solution, the over-drilled pile head is exposed by excavation to give it sufficient anchoring length, and then additional steel mesh is placed together with the cap steel mesh for concrete pouring. This can ensure the overall effect of the pile head and the cap formed after consolidation, solve the problem of poor connection effect caused by traditional pile connection, and maximize the connection quality of the pile head and the cap.

[0013] Further, step S1 includes:

[0014] The original cushion layer and soil are excavated downwards around the pile head. Taking the actual top of the pile head as the benchmark, the downward excavation depth is the sum of the thickness of the original cushion layer and the length of the pile head anchored in the pedestal as required by the design, forming a construction trench with surrounding slope.

[0015] By adopting this technical solution, the excavation depth is controlled so that the pile head is exposed for a sufficient anchoring length, while the problem of increased workload due to excessive excavation can be avoided; the slope around the construction trench can increase the connection strength between the subsequent additional cushion layer and the original cushion layer, while facilitating the concrete pouring operation for the additional cushion layer.

[0016] Further, step S2 includes:

[0017] An additional formwork is set up in the construction trench so that the distance between it and the bottom and side walls of the construction trench is the same as the thickness of the original cushion layer. Concrete is then poured into the gap between the additional formwork and the construction trench. After the concrete solidifies, the additional formwork is removed to form an additional cushion layer inside the construction trench.

[0018] By adopting this technical solution and setting up the additional formwork, the additional cushion layer can be made to have the same thickness as the original cushion layer, while achieving simultaneous connection between the additional cushion layer and the outer wall of the pile head and the original cushion layer.

[0019] Furthermore, in step S2, the highest top surface of the additional cushion layer is flush with the top surface of the original cushion layer.

[0020] By adopting this technical solution, it is ensured that the additional cushion layer does not exceed the height of the original cushion layer and affect the construction effect of the foundation.

[0021] Further, step S3 includes:

[0022] On the additional cushion layer, crisscross steel bars are evenly laid along the periphery of the pile head to form an additional steel mesh.

[0023] By adopting this technical solution, additional steel mesh is added to increase the structural strength after the subsequent concrete consolidation.

[0024] Further, step S4 includes:

[0025] A cap formwork is set up above the original cushion layer, and a cap steel mesh is laid out to cover the original cushion layer and pile heads within the range of the cap formwork.

[0026] By adopting this technical solution, the basic construction steps of the foundation are realized.

[0027] Further, step S5 includes:

[0028] Pour concrete into the cap steel mesh and additional steel mesh in the cap formwork at the same time, and stop pouring when the concrete elevation is the same as the set top elevation of the cap.

[0029] Further, step S6 includes:

[0030] After the concrete solidifies, the foundation formwork is removed and the construction is completed.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] Excavation is used to expose the over-drilled pile head so that it has sufficient anchoring length. Additional steel mesh is then placed together with the cap steel mesh for concrete pouring. This can ensure the overall effect of the pile head and the cap formed after consolidation, solve the problem of poor connection effect caused by traditional pile connection, and maximize the connection quality of the pile head and the cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the process of the pile head super-chisel treatment construction method of the present invention;

[0034] Figure 2 This is a schematic diagram showing the completion of step S1 in the pile head super-chisel treatment construction method of the present invention;

[0035] Figure 3 It is a schematic diagram of setting up additional formwork in step S2 of the pile head over-chiselling construction method of the present invention;

[0036] Figure 4 This is a schematic diagram showing the completion of step S2 in the pile head super-chisel treatment construction method of the present invention;

[0037] Figure 5 This is a schematic diagram showing the completion of steps S3-S4 in the pile head super-chisel treatment construction method of the present invention;

[0038] Figure 6 It is a schematic diagram showing the completion of steps S5-S6 in the pile head super-chiselling construction method of the present invention.

[0039] Explanation of the accompanying reference numerals: 1. Pile head; 2. Original cushion layer; 3. Construction trench; 4. Additional formwork; 5. Additional cushion layer; 6. Additional steel mesh; 7. Cap steel mesh; 8. Cap. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Please refer to the attached Figure 1The present invention provides a construction method for over-chiselling of a pile head, which is used to ensure the stability of the pile head 1 anchored in the pedestal 8 when it is over-chiselled. The construction method comprises the following steps: S1, excavating downward along the periphery of the pile head 1 to form a construction groove 3; S2, pouring concrete in the construction groove 3 to form an additional cushion layer 5; S3, laying an additional steel mesh 6 on the additional cushion layer 5 along the periphery of the pile head 1; S4, supporting a pedestal formwork and laying a pedestal steel mesh 7; S5, pouring concrete on the pedestal steel mesh 7 and the additional steel mesh 6 at the same time; S6, consolidating the concrete to complete the construction.

[0042] The over-drilled pile head 1 is exposed by excavation to allow it to have sufficient anchoring length, and then an additional steel mesh 6 is placed together with the base steel mesh 7 for concrete pouring. This can ensure the overall effect of the pile head 1 and the base 8 formed after consolidation, solve the problem of poor connection effect caused by traditional pile connection, and maximize the connection quality of the pile head 1 and the base 8.

[0043] Please refer to the attached Figure 2 Step S1 includes excavating the original cushion layer 2 and soil downward along the periphery of the pile head 1, taking the actual pile top of the pile head 1 as a reference, and the downward excavation depth is the sum of the thickness of the original cushion layer 2 and the length of the pile head 1 anchored in the pedestal 8 as required by the design, so as to control the excavation depth so that the pile head 1 is exposed to a sufficient anchoring length, and at the same time, the problem of increased workload caused by excessive excavation can be avoided; forming a construction groove 3 with a slope around the periphery can increase the connection strength between the subsequent additional cushion layer 5 and the original cushion layer 2, and at the same time can facilitate the concrete pouring operation of the additional cushion layer 5.

[0044] Please refer to the attached Figure 3-4 Step S2 includes supporting an additional template 4 in the construction trench 3 so that the distance between the additional template 4 and the bottom surface and the side wall of the construction trench 3 is the same as the thickness of the original cushion layer 2, and then pouring concrete into the gap formed between the additional template 4 and the construction trench 3, and removing the additional template 4 after the concrete is solidified to form an additional cushion layer 5 inside the construction trench 3; the setting of the additional template 4 can make the formed additional cushion layer 5 have the same thickness as the original cushion layer 2, and at the same time realize the simultaneous connection between the additional cushion layer 5 and the outer wall of the pile head 1 and the original cushion layer 2.

[0045] Furthermore, in order to ensure that the additional cushion layer 5 does not exceed the height of the original cushion layer 2 and affect the construction effect of the foundation 8, the highest top surface of the additional cushion layer 5 is set to be flush with the top surface of the original cushion layer 2.

[0046] Please refer to the attached Figure 5 Step S3 includes evenly laying crisscross steel bars on the additional cushion layer 5 along the periphery of the pile head 1 to form an additional steel mesh 6, and increasing the structural strength after subsequent consolidation of the concrete through the steel mesh 6;

[0047] Step S4 includes supporting a cap formwork above the original cushion layer 2 and laying out a cap steel mesh 7 covering the original cushion layer 2 and the pile head 1 within the range of the cap formwork, which is a basic step for the construction of the cap 8.

[0048] Please refer to the attached Figure 6 Step S5 includes pouring concrete into the cap steel mesh 7 and the additional steel mesh 6 in the cap template at the same time, and stopping the pouring when the concrete elevation is the same as the set top elevation of the cap 8;

[0049] Step S6 includes removing the foundation formwork after the concrete is solidified to complete the construction.

[0050] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A pile head over-chisel treatment construction method, used to ensure the stability of the pile head anchored into the cap when the pile head is over-chiselded, characterized in that: The construction method comprises the following steps: S1. Dig down along the periphery of the pile head to form a construction trench; S2, pouring concrete in the construction trench to form an additional cushion layer; S3. Lay additional steel mesh along the periphery of the pile head on the additional cushion layer; S4. Support the foundation formwork and lay out the foundation reinforcement mesh; S5. pouring concrete on the cap steel mesh and the additional steel mesh simultaneously; S6. Concrete solidifies and construction is completed.

2. The pile head super-chisel treatment construction method according to claim 1 is characterized in that: Step S1 includes: The original cushion layer and soil are excavated downwards around the pile head. Taking the actual top of the pile head as the benchmark, the downward excavation depth is the sum of the thickness of the original cushion layer and the length of the pile head anchored in the pedestal as required by the design, forming a construction trench with surrounding slope.

3. The pile head super-chisel treatment construction method according to claim 2 is characterized in that: Step S2 includes: An additional formwork is set up in the construction trench so that the distance between it and the bottom and side walls of the construction trench is the same as the thickness of the original cushion layer. Concrete is then poured into the gap between the additional formwork and the construction trench. After the concrete solidifies, the additional formwork is removed to form an additional cushion layer inside the construction trench.

4. The pile head super-chisel treatment construction method according to claim 3 is characterized in that: In step S2, the highest top surface of the additional cushion layer is flush with the top surface of the original cushion layer.

5. The pile head super-chisel treatment construction method according to claim 3 is characterized in that: Step S3 includes: On the additional cushion layer, crisscross steel bars are evenly laid along the periphery of the pile head to form an additional steel mesh.

6. The pile head super-chisel treatment construction method according to claim 2 is characterized in that: Step S4 includes: A cap formwork is set up above the original cushion layer, and a cap steel mesh is laid out to cover the original cushion layer and pile heads within the range of the cap formwork.

7. The pile head super-chisel treatment construction method according to claim 1 is characterized in that: Step S5 includes: Pour concrete into the cap steel mesh and additional steel mesh in the cap formwork at the same time, and stop pouring when the concrete elevation is the same as the set top elevation of the cap.

8. The pile head super-chisel treatment construction method according to claim 1 is characterized in that: Step S6 includes: After the concrete solidifies, the foundation formwork is removed and the construction is completed.

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