JPH01187228A - Settling control system for pneumatic caisson - Google Patents

Abstract

PURPOSE:To contrive unmanned operations with high efficiency at construction site by providing monitors connected to television camera attached to an excavating mechanism and a pneumatic operation room, a computer, and an excavation operating board for the centralized control room of the ground's surface. CONSTITUTION:An excavator mechanism 11 movable along rails 10 is set on the downside of the bottom board 1a of a caisson 1, and an excavator camera 12 and a caisson camera 13 are attached to the downside of the bottom 1a and the mechanism 11. In the centralized control room 26 of the ground's surface, a personal computer 27, a printer 28, an excavation operating board 33, and CRT excavation monitor 30 connected with the cameras 12 and 13 and an operating room monitor 31 are set. The settling and excavating conditions of caisson and the condition of surrounding ground are grasped through various sensors, and data are quickly processed. A series of control and operation can thus be performed only the the centralized control room 26 while watching the screen 30 and 31.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for managing the submergence of pneumatic caissons for constructing underground structures by excavating underground under pressure.

[Conventional technology and its issues]

Conventionally, when constructing a caisson, the sinking mechanism had not been theoretically elucidated, so the sinking procedure was based on a rough understanding of the order at the time of construction.

In addition, even if the settlement behavior was measured using various measuring instruments, it was only a matter of theoretically confirming the static data before and after the caisson settlement, and process and safety management relied on elements based on experience.

On the other hand, the pneumatic caisson construction method does not require a water-stop structure in addition to the caisson frame, has the advantage of being reliable and difficult to sink, and has a high rigidity of the frame. Obstacles can be handled artificially,
It also has the advantage of being able to confirm the ground and test its bearing capacity.

However, because the work is under high pressure, there are medical and other limitations on the workers and work methods. In other words, the high-pressure air causes the occurrence of incubation disease, the work environment has high concentrations of oxygen, which makes it easy to burn, and the closed environment causes problems with harmful gases and oxygen deficiency, and the higher the pressure, the shorter the working time. Because the process must be shortened (there are legal regulations), there are disadvantages such as low work efficiency.

Regarding process and safety management based on the above data, the applicant has previously determined the excavation pattern to control the amount and speed of subsidence, and the air control when performing automatic pressure regulation subsidence, in addition to measurements using various sensors. Furthermore, we have proposed a caisson sinking method that can bring about reliability of the mechanism and attitude control through scientific construction management and construction methods that feed back these and comviator processing. 61-27527)
proposed as.

Regarding workability issues, please refer to Utility Model Publication No. 55-3659
Publication No. 7 discloses an automatic earth and sand excavation and discharge device in a submersible box device in which an excavation mechanism is movably installed in a pressurized working chamber of a caisson body, and the earth and sand excavated by the excavation mechanism are automatically discharged to the ground. A monitoring device is shown in which an operator's cab is provided outside of the caisson body near the main body of the pressurized air work chamber, which is airtight from the pressurized air work chamber and communicates with the atmosphere so that the work can be directly monitored.

However, this Utility Model Publication No. 55-36597,
Since the excavation work is carried out in the operator's room near the pressurized air work room, it was not possible to coordinate the construction and safety management using the above data.

The purpose of the present invention is to provide a pneumatic caisson submersion management system that achieves complete unmanned operation and allows a series of management and operations to be performed only in a central management control room on the ground, thereby achieving further systemization. It is about providing.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a movable excavation mechanism in the pneumatic work chamber of the caisson body, a television camera is installed in the excavation mechanism and the pneumatic work chamber, and an excavation monitoring monitor screen is installed in the central control room on the ground. , installed work room monitoring monitor screen, computer, printer and excavation operation panel,
The detection values from various sensors are input into a computer to calculate an excavation pattern in which the resistance and load of the caisson are balanced, and according to the excavation pattern, the excavation operation panel is operated while viewing the excavation monitoring monitor screen and the work room monitoring monitor screen. The excavation mechanism is controlled remotely, and then the air supply flow rate valve is controlled from the excavation control panel to automatically sink the caisson, and the computer processes various information on the natural settlement during excavation to cause phytoback and subsidence. The gist of this is to repeat the excavation and automatic subsidence under controlled conditions.

[Effect]

According to the present invention, since subsidence excavation is constantly managed based on the position (depth, inclination, movement) of the pneumatic caisson, it is possible to perform subsidence excavation with high precision, and when an abnormality occurs, the measurement results are immediately fed back, so troubles can be avoided. It can be avoided or prevented before it grows. Furthermore, the situation of the surrounding ground can be accurately grasped as well as the sinking excavation status of the caisson, and this data is quickly processed by a computer, preventing the surrounding ground from sinking due to sinking, and the position of the caisson frame can be accurately measured at all times. This reduces complicated surveying work, and allows optimal subsidence excavation management to be performed using a computer without relying on the intuition of experts, thereby standardizing caisson sinking management.

Moreover, operators can perform all operations, including excavation operations and air control, from within the central management control room.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the pneumatic caisson sinking management system of the present invention, in which 1 is the caisson frame, la is the bottom plate, 1b is the cutting edge, and 2 is the pressure air formed by the cutting edge 1b. This is a work room.

A hole 4 to which the material lock 3 is connected and a hole 6 to which the manlock 5 is connected are provided in the bottom panel 1a, and an end of the air supply pipe 8 of the compressor 7 also opens into the pressurized air work chamber 2 below the bottom panel 1a. Reference numeral 9 in the figure indicates a soil removal packet that is lowered into the pressurized air work chamber 2 from the hole 4 via the material candle 3.

The above is the same as a conventional pneumatic caisson, but
A rail 10 is provided on the lower surface of the bottom plate 1a, and an excavation mechanism 11 is provided movably along the rail 10.

The excavation mechanism 11 is, for example, a shovel type in which a boom llb is supported by a turntable lla, and its working range extends to every corner of the pneumatic work chamber 2.

In addition, as the excavation mechanism 11, a scraper type mechanism having a side power cover or a tractor shovel operated wirelessly or by wire may be used.

An excavator camera 1 using a television camera is attached to this excavation mechanism 11.
2 is attached, and an in-plane camera 13 including a television camera is attached to the lower surface of the bottom plate 1a in the pressurized air work chamber 2.

Fig. 2 is a block circuit diagram of the present invention. First, to describe the sensors used in the present invention, a (pore) water pressure gauge 1 is used to obtain information in real time during subsidence and excavation.
4. A reinforcing bar gauge 15 and a concrete stress gauge 16 are buried in the caisson frame 1, and as shown in FIG. , an air supply temperature detector 21, an air supply flow rate detector 22, an air supply flow rate transmitter 23, etc. are also provided.

On the other hand, inclinometers 17', various subsidence gauges 24, 24', displacement gauges 25, etc. are provided at appropriate locations to grasp the situation of the surrounding ground.

In the figure, reference numeral 26 denotes a central management control room installed on the ground, inside which there is a personal computer 27, a printer 28 connected thereto, and a CRT excavation monitoring monitor screen 30 connected to the excavator camera 12 via a coaxial cable 29. ,
C connected with the coaxial cable 29 like the in-plane camera 13
An excavation operation panel 33 is installed with a RT work room monitoring monitor screen 31, which remotely controls the excavation mechanism 11, and also adjusts the opening of the air supply flow rate valve 32 provided in the middle of the air supply pipe 8.
adjacent.

The personal computer 27 has a CRT 34 and a floppy disk input/output device 35 as peripheral devices.

The various sensors are connected to the computer 27 via the input module 36 and input various information to the computer 27, but in addition to measurement information, the position of the excavation mechanism 11, arm angle, packet angle, rotation angle', etc. Air flow valve 32
Information such as the degree of opening is also input in the same way.

FIG. 4 is a flowchart showing an overview of the implementation, in which the shape and dimensions of the building frame, soil conditions, specifications (tolerances, etc.), internal pressure for work, etc. based on safety-related laws and regulations are preset in the computer 27 (Stesopui).

In accordance with these conditions, main data related to the subsidence, such as values detected by various sensors and soil behavior during subsidence and excavation, are input into the computer 27 (step port).

The computer 27 converts the measured values from these various sensors into physical quantities and calculates control values.

Specifically, based on theoretical calculations to calculate the static maximum ground resistance using soil properties and shape as parameters, and data obtained in the previous few steps at the site, various quantities for the next step are calculated. Statistical processing is performed to extrapolatively estimate the ground resistance based on a regression formula, and calculations are performed based on an empirical method that estimates static maximum ground resistance stratified by soil type based on a large number of actual results (Stesopha). .

As a result of these calculations, the excavation pattern and sinking instruction data are output to the CRT 34 or the like (Stesopuni).

The subsidence pressure adjustment instruction takes into consideration judgment items such as inclination, sinking speed, and subsidence amount based on sensor output, and if the subsidence is likely to become excessive, an instruction to stop depressurization or increase pressure is issued.

In addition, the main data related to the settlement is configured to measure the movement status and mechanical properties of the soil for each subsidence cycle, and to obtain the most reliable data for the next step.

Based on the excavation pattern output from the computer 27 to the CRT 34, the operator in the central management control room 26 controls the excavation mechanism 11 with the excavation operation panel 33 while looking at the excavation monitoring monitor screen 30 and the work room monitoring monitor screen 31. to excavate the ground inside the pressurized air work chamber 2.

Next, the opening degree of the air supply flow rate valve 32 is adjusted using the excavation operation panel 33 based on the set value of the predicted calculation, and the caisson frame 1 is automatically lowered by the air control for pressure regulation and lowering.

This work is to sink the caisson frame 1 so as not to cause excessive sinking amount or sinking speed (step E).

Incidentally, the caisson frame 1 also sinks slightly when the work chamber 2 is excavated. Therefore, the various information obtained from the various sensors during excavation and automatic pressure regulation settling is fed back in real time from the processing of the computer 27, and the excavation and automatic settling are repeated while managing settlement, and the caisson frame 1 is placed at a predetermined depth. to be submerged.

Furthermore, in addition to the subsidence excavation status of the caisson frame 1, the surrounding ground status is also input to the computer 27 from the subsidence gauge 24, 24', displacement gauge 25, etc., and the data is processed by the computer 27, so that it can be used for sinking. The accompanying subsidence of the surrounding ground can also be prevented.

These data are stored on a floppy disk, and can be outputted in a form by the printer 28 if necessary.

[Effects of the Invention] As described above, the pneumatic caisson sinking management system of the present invention, in addition to measurements using various sensors,
In order to control the amount and speed of subsidence, the excavation pattern and air control for automatic pressure regulation subsidence are determined, and these and computer processing enable scientific construction management. In addition, excavation and air control work can be carried out in the same central management control room based on the processing results, so the construction site can be completely unmanned.
Occurrence of incubation disease, fire, toxic gas, oxygen deficiency, and accidents resulting in death due to excessive stress of the structure due to caisson accidents, etc. are eliminated.
Moreover, since the working time can be increased, high efficiency can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the pneumatic caisson settlement management system of the present invention, Fig. 2 is a block circuit diagram of the same as above, Fig. 3 is an explanatory diagram of the measurement system, and Fig. 4 is a flowchart showing an outline. It is. 1... Caisson body 1a... Bottom plate lb... Cutting edge 2... Pressure work chamber 3... Material lock 5... Manlock 4.6... Hole 7.
...Compressor 8...Air pipe 9...Earth removal bucket 10...Rail 11...Excavation mechanism 11a...Turntable llb...Boom 12...Excavator camera 13... In-plane camera 14
...Water pressure gauge 15...Reinforcement gauge 16...Concrete stress meter 17.17'...Inclination needle 18...Barometer 19...Combustible gas detector 20...Oxygen concentration detector 21...Air supply temperature detector 22...Air supply flow rate detector 23...Air supply flow rate transmitter 24.24'...Sinkage meter 25...Displacement meter 26
... Central management control room 27 ... Personal computer 28 ... Printer 29 ... Coaxial cable 3
0... Excavation monitoring monitor screen 31... Working room monitoring monitor screen 32... Air supply flow rate valve 33... Excavation operation panel 34
...CRT 35...Floppy disk input/output device 36...Input module

Claims (1)

[Claims] A movable excavation mechanism is installed in the pressurized air work chamber of the caisson body, a television camera is installed in the excavation mechanism and the pressurized air work chamber,
The central management control room on the ground is equipped with an excavation monitoring monitor screen, a work room monitoring monitor screen, a computer, a printer, and an excavation operation panel, and the detected values from various sensors are input into the computer to balance the resistance and load of the caisson. Calculate the current excavation pattern, remotely control the excavation mechanism using the excavation control panel while viewing the excavation monitoring monitor screen and work room monitoring monitor screen according to the excavation pattern, and then control the air supply flow rate valve using the excavation control panel. A pneumatic caisson that automatically sinks the caisson and repeats the excavation and automatic sinking while controlling the sinking by processing and feeding back various information on the natural sinking and automatic sinking by a computer. Submergence management system.