Softening treatment device for pile head of cast-in-place concrete pile

Abstract

The utility model discloses a softening treatment device for a pile head of a cast-in-place concrete pile. The softening treatment device comprises a reinforcement cage, a sounding pipe, an isolation sleeve of a pile top main reinforcement exposed section, a sounding pipe isolation sleeve of a pile top exposed section and a grouting softening combined pipe fitting, the reinforcement cage is arranged in a pile hole, and the reinforcement cage main reinforcement flexible isolation sleeve is installed on the exposed section of the pile top main reinforcement. The sounding pipe is vertically arranged in the reinforcement cage, and the sounding pipe isolation sleeve is mounted on the sounding pipe; and the grouting softening combined pipe fitting is inserted into the pile top over-grouting section concrete. The main reinforcement exposed out of the pile top and the sounding pipe are separated from the concrete through the isolation sleeve, and the effect of protecting the main reinforcement and the sounding pipe is achieved; meanwhile, the mud is injected into the pile top over-grouting section concrete by means of the mud jacking and softening combined pipe fitting, so that the strength of the over-grouting section concrete is effectively reduced, the pile head is softened, and the difficulty of breaking the pile head is greatly reduced. And the isolation sleeve is made of an air bag and can be recycled. The operation process is simple, the construction efficiency is high, the working intensity is reduced, and the comprehensive cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete pouring matching devices, in particular to a concrete pouring pile head softening treatment device. Background Art

[0002] Bridge pile foundations are mostly made of reinforced concrete cast-in-place piles with high bearing capacity. When casting cast-in-place piles, in order to ensure the strength of the pile head concrete, the cast-in-place pile top elevation is 0.5 to 1.0 m higher than the designed pile top elevation. The pile head that is higher than the designed pile top elevation will be chiseled off in the subsequent process, commonly known as "broken pile head". There are two construction processes for "broken pile head": one is a hard-on-hard crushing method, which uses an air compressor or pneumatic pick to manually chisel off, or a hydraulic pile head cutting device to mechanically cut off; the other is to grout the over-cast concrete to soften it, so that it is easy to chisel off the over-cast concrete later.

[0003] Both construction techniques have a common problem: the main reinforcement is exposed on the top of the pile, the pre-buried acoustic detection tube is easily damaged during the removal of the pile head, and concrete fragments enter the acoustic detection tube and cause blockage, which increases the difficulty of subsequent pile body quality inspection. Utility Model Content

[0004] In order to solve the problems of high construction cost, great noise pollution, poor environmental protection of isolation protective sleeves, and inability to recycle and utilize the existing "broken pile head" process, the utility model proposes a concrete cast-in-place pile head softening treatment device.

[0005] The concrete cast-in-place pile head softening treatment device includes a steel cage, an acoustic detection tube, an isolation sleeve 2 for the exposed section of the main reinforcement at the pile top, an isolation sleeve 5 for the acoustic detection tube at the exposed section at the pile top, and a grouting softening combined pipe fitting 11; the steel cage is placed in the pile hole, and a steel cage main reinforcement flexible isolation sleeve 2 is installed on the exposed section 1 of the main reinforcement at the pile top; the acoustic detection tube is vertically placed in the steel cage, and an isolation sleeve 5 for the acoustic detection tube is installed on the acoustic detection tube 6; the grouting softening combined pipe fitting is inserted into the concrete 7 of the super-filling section at the pile top.

[0006] The isolation sleeve 2 of the exposed section of the main reinforcement at the pile top and the isolation sleeve 5 of the acoustic detection pipe at the exposed section of the pile top are made of air bags.

[0007] The grouting and softening combined pipe fitting 11 is composed of a grouting main pipe 8, a plurality of grouting branch pipes 9, and a connecting pipe 10 connecting the grouting main pipe and the grouting branch pipes; the grouting branch pipes are evenly opened along the pipe body and have a pointed cone at the end.

[0008] The end of the grouting branch pipe is 15 cm higher than the bottom of the concrete of the pile top super-filling section.

[0009] The grouting and softening combined pipe fitting is connected to the mud pump, and a valve is arranged at the connection.

[0010] The utility model uses an isolation sleeve to separate the exposed main reinforcement and acoustic detection tube from the concrete at the top of the pile, thereby protecting the main reinforcement and acoustic detection tube; at the same time, the grouting and softening combined pipe is used to inject mud into the concrete of the overfilled section at the top of the pile, so that the concrete is mixed with mud and cement particles are lost, which effectively reduces the strength of the concrete in the overfilled section, softens the pile head, and greatly reduces the difficulty of breaking the pile head. The isolation sleeve is made of an airbag, and after breaking the pile head and deflating the airbag, the airbag can be taken out to achieve recycling. The operation process is simple, the construction efficiency is high, the work intensity is reduced, and the overall cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 It is a schematic diagram of the concrete cast-in-place pile body;

[0012] Attached Figure 2 It is a schematic diagram of the acoustic detection tube;

[0013] Attached Figure 3 It is an orthographic schematic diagram of the installation of the grouting softening combined pipe fittings of the concrete cast-in-place pile head softening treatment device of the utility model to the concrete super-pouring section at the pile top;

[0014] Attached Figure 4 It is a schematic diagram of the grouting branch pipes of the grouting softening combined pipe fittings in the concrete cast-in-place pile head softening treatment device of the utility model;

[0015] Attached Figure 5 Schematic diagram of the airbag isolation sleeve;

[0016] In the figure, 1 is the exposed section of the main reinforcement at the top of the pile, 2 is the isolation sleeve of the exposed section of the main reinforcement at the top of the pile, 3 is the main reinforcement of the pile body, 4 is the pile hole, 5 is the isolation sleeve of the acoustic detection pipe at the exposed section of the pile top, 6 is the acoustic detection pipe, 7 is the concrete of the over-filling section at the top of the pile, 8 is the grouting main pipe, 9 is the grouting branch pipe, 10 is the connecting pipe, and 11 is the grouting softening combined pipe fittings. DETAILED DESCRIPTION

[0017] Example 1

[0018] The concrete cast-in-place pile head softening treatment device comprises a steel cage, an acoustic detection tube, an isolation sleeve 2 for the exposed section of the main reinforcement at the pile top, an isolation sleeve 5 for the acoustic detection tube at the exposed section at the pile top, and a grouting softening combined pipe fitting 11; the steel cage is placed in the pile hole, and a steel cage main reinforcement flexible isolation sleeve 2 is installed on the exposed section 1 of the main reinforcement at the pile top; the acoustic detection tube is vertically placed in the steel cage, and an isolation sleeve 5 for the acoustic detection tube 6 is installed; the grouting softening combined pipe fitting is inserted into the concrete 7 of the over-filling section at the pile top.

[0019] The isolation sleeve 2 of the exposed section of the main reinforcement at the pile top and the isolation sleeve 5 of the acoustic detection pipe at the exposed section of the pile top are made of air bags.

[0020] The grouting and softening combined pipe fitting 11 is composed of a grouting main pipe 8, five grouting branch pipes 9, and a connecting pipe 10 connecting the grouting main pipe and the grouting branch pipes; the grouting branch pipes are made of steel and have holes evenly opened along the pipe body and a pointed cone at the end.

[0021] The end of the grouting branch pipe is 15 cm higher than the bottom of the concrete of the pile top super-filling section.

[0022] The grouting and softening combined pipe fitting is connected to the mud pump, and a valve is arranged at the connection. After the mud pump is started, the mud is uniformly injected into the concrete of the pile top super-filling section from the opening of the grouting branch pipe pile body. The valve controls the flow rate and flow velocity of the mud injection.

[0023] The utility model discloses a device for softening the pile head of a concrete bored pile, which effectively solves the problems that the concrete strength of the over-filled section of the pile body is high, mechanical chiseling is difficult, the construction efficiency is low, and the main reinforcement and the acoustic detection tube are easily damaged; and the isolation sleeve can be recycled by inflating and deflating the air bag, and the construction is simple and convenient, and it is more environmentally friendly and economical.

Claims

1. A concrete cast-in-place pile head softening treatment device, characterized in that: The device comprises a steel cage, an acoustic detection tube, an isolation sleeve for the exposed section of the main reinforcement at the top of the pile, an isolation sleeve for the acoustic detection tube at the exposed section of the top of the pile, and a grouting and softening combined pipe fitting; the steel cage is placed in the pile hole, and the isolation sleeve for the exposed section of the main reinforcement at the top of the pile is installed on the exposed section of the main reinforcement at the top of the pile; the acoustic detection tube is vertically placed in the steel cage, and the isolation sleeve for the acoustic detection tube at the exposed section of the top of the pile is installed on the acoustic detection tube; the grouting and softening combined pipe fitting is inserted into the concrete of the super-filling section at the top of the pile; the isolation sleeve for the exposed section of the main reinforcement at the top of the pile and the isolation sleeve for the acoustic detection tube at the exposed section of the top of the pile are made of air bags.

2. The concrete cast-in-place pile head softening treatment device according to claim 1, characterized in that: The grouting and softening combined pipe fittings are composed of a grouting main pipe, a plurality of grouting branch pipes, and a connecting pipe connecting the grouting main pipe and the grouting branch pipes; the grouting branch pipes are evenly opened along the pipe body and have a pointed cone at the end.

3. The concrete cast-in-place pile head softening treatment device according to claim 2, characterized in that: The end of the grouting branch pipe is 15 cm higher than the bottom of the concrete in the over-filling section at the top of the pile.

4. The concrete cast-in-place pile head softening treatment device according to claim 1, characterized in that: The grouting and softening combined pipe fitting is connected to the mud pump, and a valve is arranged at the connection.

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