JPH08326316A - Cleaning equipment for temporary earth retaining concrete placing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Efficiently clean concrete pipes during temporary earth retaining work using cast-in-place concrete. [Structure] A concrete feeding port 14 of a mold 10 is provided with a pressure-feeding cylinder 15 having a switching valve function.
The concrete pouring pipe 20 is connected to the front concrete supply port 16 of No. 5, and the wash water return pipe 24 is connected to the rear wash water port 17. The wash water return conduit 24 is connected to a wash water settling tank 23 and a wash water storage tank 22 on the ground via a circulation pump 25. Pumping cylinder 1 when cleaning piping
The piston No. 5 is moved forward so that the concrete supply port 16 and the wash water port 17 are communicated with each other. The concrete pumping pump 19 pumps the washing water from the washing water storage tank 22 into the concrete placing pipe 20, and the washing water return pipe 24
The circulation pump 25 provided in the above section returns the washing water to the washing water settling tank 23 and the washing water storage tank 22 to circulate and wash the inside of the pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning device in a temporary earth retaining concrete placing device.

[0002]

2. Description of the Related Art Conventionally, when performing temporary earth retaining by in-place concrete using a formwork when excavating a vertical foundation,
After pouring concrete, washing water is pumped from the ground into the placing pipe, and the residual concrete in the pipe and the washing water are discharged into the mine to wash the pipe, or the pipe is pulled up to the ground for washing.

[0003]

In the temporary soil retention with cast-in-place concrete, work such as demolding of the formwork, removal of residual concrete in the concrete pipe with cleaning water and cleaning of the pipe are performed after the completion of pouring the concrete. However, when the concrete and the cleaning water are discarded in the mine, the discarded concrete adheres to the excavation bit of the full-section excavator or the like, which lowers the excavation efficiency.

Further, when the concrete placing pipe is pulled up to the ground and washed after each completion of the one placing process, it is troublesome to repeat the pipe work and the workability is deteriorated. And in any case, there is a drawback that a large amount of washing water is required.

Therefore, the problem is solved in order to eliminate the fear of lowering the excavation efficiency by collecting the residual concrete in the concrete pouring pipe in the temporary earth retention, and to reduce the time and labor required for cleaning the pipeline and the amount of cleaning water used. Therefore, the present invention has an object to solve the above problems.

[0006]

The present invention is proposed in order to achieve the above-mentioned object, and a concrete pouring port of a formwork installed in a shaft and a concrete pressure pump on the ground are concrete-poured. In a temporary earth retaining concrete pouring device connected by piping, a switching valve is provided at the concrete pouring port, and the concrete pouring pipe and the washing water pipe are connected to the switching valve to connect the concrete pouring pipe. A connection is formed so as to be switchable between a concrete pouring port and a washing water pipe, and the washing water pipe is connected upstream of a concrete pressure pump on the ground to form a circulation pipe,
Temporary earth retention with a cleaning water storage tank installed on the ground and a pump installed inside the mine inserted into the cleaning water pipeline, and a conduit opening / closing means such as an on-off valve provided between the concrete pressure pump and the cleaning water storage tank. A cleaning device for a concrete placing device is provided.

[0007]

According to the present invention, the washing water pipe line is provided for returning from the concrete placing port of the concrete placing pipe to the concrete pressure pump via the above-mentioned washing water storage tank. The concrete pouring port is provided with a switching valve that switches the connection of the concrete pouring pipe to the concrete pouring port and the washing water pipe line.When cleaning the concrete pouring pipe,
The concrete pouring pipe and the washing water pipe are connected by operating the switching valve, and the washing water in the washing water storage tank is supplied to the concrete pressure pump by operating the opening / closing valve. The washing water pumped into the concrete placing pipe by the concrete pumping pump passes through the washing water pipe line from the switching valve at the concrete placing port portion, and the washing water and the concrete return to the washing water storage tank by the pump. Then, the concrete pressurizing pump circulates the washing water through the pipe line to wash the pipe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1, 1 is a full-section excavator for excavating a shaft such as a deep foundation, and 2 is a formwork device for temporary earth retention. The formwork device 2 has a three-layered structure including an upper gripper device 3, a middle formwork expansion / contraction device 4 and a lower end plate opening / closing device 5, and hydraulic cylinders 6, 6 radially arranged outwardly, respectively. , 7, 7, 7, ..., 8, 8, ..., The grippers 9, 9, ..., The segment formwork 10, 10 ,.

In the formwork apparatus 2, the grippers 9, 9, ...
Is expanded and the formwork 10 is set from the lower end of the existing temporary earth retention 12 to the lower side, and the end plate 11 is pressed against the lower end of the formwork 10 and the ground 13. In addition, the concrete feeding port 14 of the formwork 10 has a pressure-feeding cylinder 1 having a function as a switching valve.
5 is attached, the concrete supply port 16 of the pumping cylinder 15 is connected to a concrete pumping pump on the ground by a concrete placing pipe (not shown), and the concrete pumping pump creates a gap between the formwork 10 and the ground 13. Filled with concrete. Further, a washing water pipe line described later is connected to the washing water port 17 on the back side of the pressure feeding cylinder 15, and the concrete supply port 16 and the washing water port 17 are shut off when the piston of the pressure feeding cylinder 15 is in the retracted position as shown in FIG. As shown in FIG. 3, the concrete supply port 16 and the wash water port 17 are formed to communicate with each other when the piston is at the frontmost position.

2 to 5 are circuit diagrams of the concrete placing pipe and the washing pipe, in which 18 is a concrete storage tank and 19 is a concrete pressure pump. The concrete pressure pump 19 and the pressure cylinder 15 of the formwork device 2,
15 and 15 are concrete pouring pipes 2 as described above.
0, each pumping cylinder 15, 15, 15
The distribution of concrete is controlled by the solenoid valves V ₁ , V ₂ and V ₃ provided upstream of the. The concrete placing pipe 20 is provided with an air intake pipe 21 downstream of the concrete pressure pump 19.
Is branched and the atmosphere can be introduced into the concrete pouring pipe 20 by operating the manually operated valve V ₁₀ of the air intake pipe 21.

The cleaning water storage tank 22 and the cleaning water settling tank 23 are installed on the ground, and the pressurizing cylinders 15, 15,
The washing water port 17 of 15 and the washing water settling tank 23 are connected by a washing water return line 24. The wash water in the wash water return line 24 is supplied to the circulation pump 25 installed in the formwork apparatus 2.
Is sent to the washing water settling tank 23 under pressure. The washing water settling tank 23 and the washing water storage tank 22 are connected by pipes 26 at the upper portions of the tanks. Further, the cleaning water storage tank 22 and the cleaning water ports 17, 17, 17 of the pressure-feeding cylinders 15, 15, 15 of the formwork apparatus 2 are connected by a cleaning water auxiliary pipe line 27.

Inlet line for concrete pump 19
Is branched into the wash water storage tank 22 and
Provided in the storage tank side pipeline 28 and the storage tank side pipeline 29, respectively.
Manually operated valve V₁₁, V₁₂By opening and closing
Concrete or cleaning water to concrete pouring pipe 20
It can be pumped. In addition, the circulation pump of the formwork device 2
The discharge side of 25 is an excavation that supplies water to the excavation surface of the excavator 1.
The auxiliary water pipeline 30 is branched, and the wash water return pipeline 24 is provided.
And the suction side of the circulation pump 25 are connected by the bypass pipe line 31.
Continued and bypassed from the wash water return line 24 on the ground
The pipe 32 is operated by a manually operated valve V₁₃To the wash water storage tank 22 via
Connected. Of the suction side and the discharge side of the circulation pump 25
Solenoid valve V is provided in each of the branch lines 24, 24, 30, 31.₆,
V₇, V ₈, V₉Is provided.

Next, the flow of concrete pouring and pipe cleaning will be described. FIG. 2 shows a flow at the time of placing concrete, in which the manually operated valve V ₁₀ of the air intake pipe 21 is closed, the solenoid valves V ₁ , V ₂ , V ₃ of the concrete placing pipe 20 are opened, and the concrete pressure pump 19 is opened. By driving, concrete is supplied to the concrete supply ports 16, 16, 16 of the pumping cylinders 15, 15, 15.

FIG. 3 and FIG. 4 show the flow of washing concrete pouring pipes. As shown in FIG.
The pistons 5, 15 are moved forward to connect the concrete supply ports 16, 16, 16 with the wash water ports 17, 17, 17. Then, the concrete containing tank side pipeline 28
The manual operation valve V ₁₁ is closed, the manual operation valve V ₁₂ of the reservoir side pipeline 29 is opened, and the concrete pumping pump 19 pumps the washing water into the concrete pouring pipe 20. Also,
The manually operated valve V ₁₄ of the wash water auxiliary line 27 is opened, and the wash water is supplied to the pressure-feeding cylinders 15, 15, 15 by utilizing the water head pressure. The concrete to be recovered is diluted with this auxiliary cleaning water, and the cleaning is effectively performed.

For the concrete and the washing water in the pipe, the solenoid valves V ₆ and V ₉ of the washing water return pipe 24 before and after the circulation pump 25 are opened to drive the circulation pump 25, whereby the washing water return pipe 24 is driven. Through the washing water settling tank 23. The concrete in the returned washing water settles in the washing water settling tank 23, and the supernatant flows into the washing water storage tank 22 through the upper pipe 26, and again the concrete pouring pipe 2
It is supplied into 0 and circulates. By circulating the wash water in this manner, the concrete in the concrete pouring pipe 20 is replaced with the wash water.

After the washing is completed, as shown in FIG. 4, the concrete pump 19 is stopped and the manually operated valve V ₁₀ of the air intake pipe 21 is opened to circulate the washing water in the concrete placing pipe 20. Washing water settling tank 2 by pump 25
3 and the washing water storage tank 22 are ready for concrete pouring in the next step.

Further, when excavating rock, it is necessary to supply water to the face of the face of the excavator 1 in order to prevent the blade of the excavator 1 from being damaged by heat. In this case, as shown in FIG. 5, the excavation auxiliary water pipeline 30, the bypass pipelines 31, 32
Solenoid valves V ₄ , V ₅ , V ₇ , V _{8 and} manually operated valve V ₁₃
And the circulation pump 25 is driven to supply the cleaning water in the cleaning water storage tank 22 to the face of the face through the auxiliary drilling water conduit 30.

The present invention should not be limited to the above-mentioned embodiment, but various modifications can be made within the technical scope of the present invention, and the present invention covers those modifications. It is natural.

[0019]

As described in detail in the above one embodiment, the present invention is capable of recovering the residual concrete in the concrete placing pipe to the ground in the temporary earth retaining by the in-place concrete, so that the concrete is discarded in the mine. Unlike the above, there is no fear of lowering the excavation efficiency. Also, since the cleaning water is circulated to clean the inside of the pipe, the amount of cleaning water used decreases,
It can contribute to shortening the construction period and cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional end view of a full-section vertical shaft excavator and a formwork apparatus according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of the cleaning device and is an explanatory diagram showing a flow at the time of placing concrete.

FIG. 3 is an explanatory diagram showing a flow at the time of cleaning the pipe.

FIG. 4 is an explanatory diagram showing a flow at the time of collecting wash water.

FIG. 5 is an explanatory diagram showing a flow when supplying auxiliary water for excavation.

[Explanation of symbols]

 1 Full-section vertical shaft excavator 2 Formwork device 10 Formwork 13 Ground 14 Concrete pouring mouth 15 Pump cylinder 16 Concrete supply port 17 Washing water port 19 Concrete pumping pump 20 Concrete pouring pipe 22 Washing water storage tank 23 Washing water Settling tank 24 Washing water return line 25 Circulating pump 27 Washing water auxiliary line 30 Drilling auxiliary water line

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 000207780 Taiho Construction Co., Ltd. 1-24-4 Shinkawa, Chuo-ku, Tokyo (71) Applicant 391035795 Shiroishi Co., Ltd. 2-4-1 Marunouchi, Chiyoda-ku, Tokyo (72) ) Inventor Junichiro Omori 2-3-24 Yokota, Atsuta-ku, Nagoya-shi, Aichi Chuo Electric Power Co., Inc. Central Transmission and Substation Construction Site (72) Inventor Hirokazu Inagaki 2-1, Tsukudocho, Shinjuku-ku, Tokyo Kumagaya Gumi Co., Ltd. Head office

Claims (1)

[Claims] 1. In a temporary earth retaining concrete pouring device in which a concrete pouring port of a formwork installed in a vertical shaft and a concrete pressure pump on the ground are connected by a concrete pouring pipe, a switching valve is provided at the concrete pouring port. Is provided, and the concrete pouring pipe and the washing water pipe are connected to the switching valve, and the pipe connection of the concrete pouring pipe is switchably formed between the concrete pouring port and the washing water pipe. A channel is connected to the upstream of the concrete pressure pump on the ground to form a circulation pipeline, and the wash water storage tank installed on the ground and the pump installed in the mine are inserted into the wash water pipeline, and the concrete pressure pump and A cleaning device for a temporary earth retaining concrete placing device in which a conduit opening / closing means such as an opening / closing valve is provided between the cleaning water storage tank.