Pile head breaking structure of reinforced concrete cast-in-place pile

Abstract

The utility model relates to the technical field of building construction, and discloses a cast-in-place reinforced concrete pile breaking head structure which comprises a cast-in-place reinforced concrete pile breaking head and a pile breaking head assembly. The pile breaking head assembly comprises a steel reinforcement cage inserted into concrete in a penetrating mode, and reinforcing ribs are fixedly installed on the periphery of the steel reinforcement cage. A protection assembly is arranged on the pile head breaking assembly, the protection assembly comprises a first PVC sleeve arranged on the reinforcement cage in a sleeving mode and a first cover cap installed at the upper end of the first PVC sleeve, and the utility model further discloses an annular cutting method treatment breaking process of the reinforced concrete cast-in-place pile breaking head. Materials and machines are convenient to purchase, the cross section of the pile head is flat, manual secondary finishing is not needed, safety and environmental protection are achieved, energy is saved, the speed quality is improved, and the requirement for overall pile head breaking through the ring cutting method is conveniently and efficiently met.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and specifically relates to a structure for removing the pile head of a reinforced concrete cast-in-place pile. Background Art

[0002] In the construction of reinforced concrete bored cast-in-place piles, to ensure the quality of the pile head, the specification requires that when pouring concrete, the top surface must be 0.5 - 0.8 m higher than the design elevation. The concrete poured in excess needs to be removed from the pile head. Usually, the methods for removing the pile head are manual demolition and mechanical demolition. These methods are prone to causing uneven pile heads, damaged steel bars, low work efficiency, long cycle, poor pile head quality, and high construction costs. Moreover, when the cutting line of the pile head is not pre-cut with tools such as a cutter, directly using tools such as a pneumatic pick or a vibrating hammer by manual to remove the pile head concrete, the "direct chiseling method" for removing the pile head has been listed as an obsolete process in the construction industry. The new "hydraulic pile head crusher" direct breaking method does not meet the requirement of pre-cutting the cutting line of the pile head with tools such as a cutter, which has an impact on the quality of the pile head concrete and steel bars.

[0003] In view of the above problems and to solve the defects of the prior art, the utility model provides a structure for removing the pile head of a reinforced concrete cast-in-place pile. Summary of the Invention

[0004] The purpose of the utility model is to provide a structure for removing the pile head of a reinforced concrete cast-in-place pile to solve the problems in the above background art that the common methods for removing the pile head are manual demolition and mechanical demolition, which are prone to causing uneven pile heads, damaged steel bars, low work efficiency, long cycle, poor pile head quality, and high construction costs.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A pile head breaker for a reinforced concrete cast-in-place pile, comprising a pile head breaking component;

[0006] The pile head breaking component includes a steel reinforcement cage inserted into the concrete, and a reinforcing rib is fixedly installed on the outer periphery of the steel reinforcement cage;

[0007] A protective component is arranged on the pile head breaking component, and the protective component includes a first PVC sleeve sleeved on the steel reinforcement cage and a first cap installed at the upper end of the first PVC sleeve.

[0008] Preferably, a rubber component is arranged on the outer periphery of the pile head breaking component. The rubber component includes four rubber hoses, the rubber hoses are arc-shaped structures, an installation groove is formed between adjacent rubber hoses, and the four rubber hoses together form an annular structure. The four rubber hoses are tied and fixed on the outer periphery of the steel reinforcement cage.

[0009] Preferably, the pile head breaking assembly further comprises an embedded assembly, and the embedded assembly comprises a second PVC sleeve arranged in the installation groove and second caps installed on both sides of the second PVC sleeve.

[0010] Preferably, a first concrete body and a second concrete body are cast on the outer periphery of the steel cage, and the first concrete body and the second concrete body are respectively located on the upper and lower sides of the rubber hose.

[0011] The utility model also discloses a process for removing a broken pile head of a reinforced concrete cast-in-place pile by a ring cutting method, comprising the following steps:

[0012] S01: Put the first PVC sleeve over the main reinforcement and the acoustic detection pipe on the top of the reinforcement cage, and seal the port of the first PVC sleeve with a first cap, tape, etc.;

[0013] S02: Use a rubber hose with the same diameter as the thickness of the protective layer to tie and fix the outer periphery of the steel cage at the top elevation of the pile to form a ring-shaped section that induces separation;

[0014] S03: A second PVC sleeve with an inner diameter matching the outer diameter of the splitter gun head is embedded at the cross point at the center elevation of the ring-cut cross-section rubber hose. The two ends of the second PVC sleeve are sealed with a second cap and tape and tied firmly with erecting steel bars and wire ties;

[0015] S04: Use a one-to-three or one-to-four hydraulic rock splitter to insert it into the pre-buried second PVC casing hole;

[0016] S05: Quickly cut off and separate the pile head concrete as a whole along the annular section, and then use lifting equipment to lift away the useless pile head.

[0017] Preferably, in step S03, three or four second PVC sleeves are pre-buried, and the pre-buried depth is 20-25 cm.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The first PVC casing completely isolates the concrete at the pile head from the steel cage, removes the wrapping constraint between the concrete, steel bars and the acoustic testing tube, avoids bending damage to the steel bars when the steel bars are manually stripped, and at the same time converts the reinforced concrete with extremely high tensile strength into plain concrete with extremely low tensile strength.

[0020] The rubber hose is installed along the annular section. Before the pile head is broken, the rubber hose is removed at the designed pile top elevation, naturally forming an annular section that induces pile head separation, without the need for pre-annular cutting and mechanical grooving.

[0021] The second PVC casing is pre-buried to reserve a hole for the hydraulic rock splitter gun head to be inserted into, eliminating the need for manual drilling using a drill.

[0022] This construction technology for breaking the pile head is convenient for material and machinery procurement. The cross-section of the pile head is flat and does not require secondary manual trimming. It is safe, environmentally friendly, energy-saving, and can improve the progress and quality, achieving the requirements of the overall pile head breaking by the circumferential cutting method conveniently and efficiently. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the process principle of breaking the pile head by a hydraulic splitting machine with one-drag-three or one-drag-four of the present utility model;

[0024] Figure 2 It is a schematic diagram of the overall structure of removing the second concrete body of the present utility model;

[0025] Figure 3 It is a top view of the overall of the present utility model;

[0026] Figure 4 It is a schematic diagram of the overall structure of breaking the pile head of the present utility model.

[0027] In the figure: 1. Pile head breaking assembly; 11. Steel reinforcement cage; 12. Reinforcing bars; 2. First concrete body; 3. Protection assembly; 31. First PVC casing; 32. First cap; 4. Rubber assembly; 41. Rubber hose; 42. Installation groove; 5. Embedded assembly; 51. Second PVC casing; 52. Second cap; 6. Second concrete body. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1 - 4 , the present utility model provides a technical solution: a pile head breaking of a reinforced concrete cast-in-place pile, including a pile head breaking assembly 1;

[0030] The pile head breaking assembly 1 includes a steel reinforcement cage 11 inserted into the concrete. The steel reinforcement cage 11 includes main bars and acoustic pipes, and reinforcing bars 12 are fixedly installed on the outer periphery of the steel reinforcement cage 11;

[0031] A protective component 3 is provided on the broken pile head component 1, and the protective component 3 includes a first PVC sleeve 31 sleeved on the steel cage 11 and a first cap 32 installed on the upper end of the first PVC sleeve 31. The first PVC sleeve completely isolates the concrete at the pile head from the steel cage, removes the wrapping constraint force between the concrete and the steel bars and the acoustic detection pipe, avoids bending damage to the steel bars when the steel bars are manually stripped, and at the same time converts the reinforced concrete with extremely high tensile strength into plain concrete with extremely low tensile strength.

[0032] A rubber component 4 is arranged on the periphery of the pile head breaking component 1. The rubber component 4 includes four rubber hoses 41. The rubber hoses 41 are of an arc-shaped structure. An installation groove 42 is provided between adjacent rubber hoses 41. The four rubber hoses 41 are combined into an annular structure. The four rubber hoses 41 are tied and fixed on the periphery of the steel cage 11. The rubber hoses are installed along the annular section. Before the pile head is broken, the rubber hoses are removed at the designed pile top elevation to naturally form an annular section that induces pile head separation, without the need for pre-annular cutting and mechanical grooving.

[0033] The pile breaking head assembly 1 also includes an embedded assembly 5, which includes a second PVC sleeve 51 arranged in the installation groove 42 and a second cap 52 installed on both sides of the second PVC sleeve 51. The second PVC sleeve 51 is embedded in advance to reserve a hole for the hydraulic rock splitter gun head to be inserted into, and there is no need to drill a hole manually using a drill rig.

[0034] A first concrete body 2 and a second concrete body 6 are cast on the outer periphery of the steel cage 11 . The first concrete body 2 and the second concrete body 6 are respectively located on the upper and lower sides of the rubber hose 41 .

[0035] The utility model also discloses a process for removing a broken pile head of a reinforced concrete cast-in-place pile by a ring cutting method, comprising the following steps:

[0036] Step 1: Sleeve the first PVC sleeve 31 over the main reinforcement and the acoustic detection tube on the top of the reinforcement cage 11, and seal the port of the first PVC sleeve 31 with a first cap 32, adhesive tape, etc.;

[0037] Step 2: Use a rubber hose 41 with the same diameter as the thickness of the protective layer to tie and fix the outer periphery of the steel cage 11 at the pile top elevation position to form a ring-shaped section that induces separation;

[0038] Step 3: pre-embed a second PVC sleeve 51 with an inner diameter matching the outer diameter of the splitter gun head along the cross point at the center elevation of the ring-cut cross-section rubber hose 41, and seal the two ends of the second PVC sleeve 51 with a second cap 52 and tape and tie them firmly with erected steel bars and wire ties;

[0039] Step 4: Use a one-to-three or one-to-four hydraulic rock splitter to insert it into the pre-buried second PVC casing 51 hole;

[0040] Step Five: Quickly truncate along the circumferential cutting section and integrally separate the pile head concrete, and then use a lifting device to lift away the useless pile head.

[0041] In Step Three, when the pile diameter is small, only three second PVC sleeves 51 need to be embedded (circumferentially arranged at 120 degrees) with a depth of about 20 cm. When the pile diameter is large, four second PVC sleeves 51 need to be embedded (circumferentially arranged at 90 degrees) with a depth of about 25 cm.

[0042] This construction technology for pile head breaking is convenient for the procurement of materials and machinery. The cross-section of the pile head after truncation is flat and does not require secondary manual trimming. It is safe, environmentally friendly, energy-saving and green, improves the progress and quality, and can conveniently and efficiently meet the requirements of integral pile head breaking by the circumferential cutting method.

[0043] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pile head breaking structure for a reinforced concrete cast-in-place pile, comprising a pile head breaking assembly (1); It is characterized in that, The pile head breaking assembly (1) includes a steel reinforcement cage (11) inserted into the concrete, and a reinforcing bar (12) is fixedly installed on the outer periphery of the steel reinforcement cage (11); A protection assembly (3) is arranged on the pile head breaking assembly (1), and the protection assembly (3) includes a first PVC sleeve (31) sleeved on the steel reinforcement cage (11) and a first cap (32) installed at the upper end of the first PVC sleeve (31).

2. A pile head breaking structure for a reinforced concrete cast-in-place pile according to claim 1, characterized in that: A rubber assembly (4) is arranged on the outer periphery of the pile head breaking assembly (1), and the rubber assembly (4) includes four rubber hoses (41). The rubber hoses (41) are arc-shaped structures, and an installation groove (42) is formed between adjacent rubber hoses (41). The four rubber hoses (41) together form an annular structure, and the four rubber hoses (41) are tied and fixed on the outer periphery of the steel reinforcement cage (11).

3. A pile head breaking structure for a reinforced concrete cast-in-place pile according to claim 2, characterized in that: The pile head breaking assembly (1) further includes an embedded assembly (5), and the embedded assembly (5) includes a second PVC sleeve (51) arranged in the installation groove (42) and second caps (52) installed on both sides of the second PVC sleeve (51).

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