JPH0565658B2 - - Google Patents

Description

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

[Conventional technology and its issues]

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

Furthermore, even if the state of settlement is measured using various measuring instruments, it is only a matter of theoretically confirming the static data before and after the caisson has settled, and process and safety management must rely on empirically accumulated factors. Ta.

On the other hand, the new caisson construction method does not require a water-stop structure in addition to the caisson frame, is reliable in its construction, is difficult to sink suddenly, and has the advantage of having a highly rigid frame. Therefore, it has the advantage that obstacles can be removed artificially, and the ground can be confirmed and bearing capacity tested.

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 the process and complete management based on the above data, the applicant has previously determined the excavation pattern and air control when performing automatic pressure regulating settling in order to control the amount and speed of settling, in addition to measurements using various sensors. Furthermore, the patent application No. 54-53627 (Sho 54-53627) describes a caisson sinking method that can provide structural reliability, reliability of attitude control, etc. through scientific construction management and construction methods that feed back these and computer processing. 61-27527).

This Japanese Patent Application No. 54-53627 (Japanese Patent Publication No. 61-27527) describes the detected values from each sensor and the soil value,
An excavation pattern in which the resistance and load of the caisson are balanced is calculated from the soil layer distribution, the caisson work room is excavated according to the excavation pattern, and then air control for pressure regulation settlement is performed based on the settings of the prediction calculation. A large caisson characterized in that the caisson is automatically submerged by a computer, and various information regarding the natural subsidence during the excavation and the natural subsidence is processed by a computer and fed back to manage subsidence while repeating the excavation and natural subsidence. This is the subsidence method.

However, although this caisson sinking method calculates an excavation pattern, it does not say anything about excavating the ground inside the caisson working room according to this excavation pattern, and it does not say anything about excavating the ground inside the caisson work room according to this excavation pattern. has not been mentioned either.

On the other hand, regarding the problem of workability such as excavation, Japanese Utility Model Publication No. 55-36597 provides a movable excavation mechanism in the pressurized working chamber of the caisson body, and the earth and sand automatically excavated by the excavation mechanism are automatically placed on the ground. In an automatic earth and sand excavation and discharge device in a submersible box device, the pressurized air working chamber is located outside of the caisson body near the main body, and the pressurized air working chamber is an airtight operation room that is connected to the atmosphere and allows direct monitoring of the work. A monitoring device is shown with a

The driver's cab consists of an atmospheric capsule for driving, which is equipped with a plurality of viewing windows in the peripheral wall.

However, this publication of Publication No. 55-36597 is
Excavation work is carried out in the operator's room near the pressurized work room, so
It was not possible to link the above data to construction and safety management.

The purpose of the present invention is to realize a system for sinking a neutral caisson, which can achieve complete unmanned operation and further systemization by allowing a series of management and operations to be performed only in a central management control room on the ground. Our goal is to provide the following.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a movable excavation mechanism in the pressurized air work chamber of the caisson body, installs a television camera in the excavation mechanism and the pressurized air work chamber, and provides a central management control room on the ground. is a personal computer, a printer connected to it, a CRT excavation monitoring monitor screen connected by a coaxial cable to the TV camera installed in the excavation mechanism, and a CRT connected by a coaxial cable to the camera installed in the pressurized work room. A room monitoring monitor screen was installed, and an excavation control panel was installed adjacent to these to remotely control the excavation mechanism and to adjust the opening of the air supply flow valve installed in the middle of the air supply pipe whose end opens into the pressurized air work chamber. Then, the detected values from various sensors are input into a computer to calculate an excavation pattern in which the resistance of the caisson and the load are balanced, and excavation is carried out according to the excavation pattern while looking at the excavation monitoring monitor screen and the work room monitoring monitor screen. The excavation mechanism is remotely controlled from the operation panel, and then the air supply flow rate valve is controlled from the excavation operation panel to automatically sink the caisson, and various information regarding the natural settlement and automatic settlement during the excavation is processed by a computer. The gist of this method is to repeat the excavation and automatic subsidence while controlling subsidence through feedback.

[Effect]

According to the present invention, since subsidence excavation is constantly managed based on the position (depth, inclination, movement) of the neutral caisson, it is possible to perform subsidence excavation with high accuracy, and when an abnormality occurs, the measurement results are immediately fed back, so troubleshooting can be avoided. 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 enables optimal subsidence excavation management using a computer without relying on the intuition of experts.
Standardization of caisson sinking management can be achieved.

Furthermore, operators can perform all operations, including excavation operations and air control, from a central management control room on the ground.

〔Example〕

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

FIG. 1 is an explanatory diagram of one embodiment of the pneumatic caisson sinking management system of the present invention, in which 1 is the caisson frame, 1a is its bottom plate, 1b is the cutting edge, and 2
is a pressure working chamber formed by the cutting edge 1b.

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 plate 1a, and the end of the air pipe 8 of the compressor 7 also opens into the pressurized air work chamber 2 below the bottom plate 1a. In the figure, reference numeral 9 denotes a bucket for soil removal that is lowered into the pressurized air work chamber 2 from the hole 4 through the material lock 3.

The above is the same as the 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 this rail 10. The excavation mechanism 11 is, for example, of a shovel type in which a boom 11b is supported by a turntable 11a, and its work 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 cutter or a tractor shovel operated wirelessly or by wire may be used.

An excavator camera 12 with a television camera is attached to this excavation mechanism 11, and an inside camera 13 with a television camera is attached to the lower surface of the bottom plate 1a in the pressurized air work chamber 2.
Install.

FIG. 2 is a block circuit diagram of the present invention. First, the sensors used in the present invention will be described. As sensors that obtain information in real time during subsidence and excavation, there are a (pore) water pressure gauge 14, a reinforcing bar gauge 15, , a concrete stress meter 16 is buried in the caisson frame 1, and as shown in FIG. 21, Air supply flow rate detector 2
2. An air supply flow rate transmitter 23 and the like 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.

26 in the figure is a central management control room installed on the ground, and inside it is a personal computer 27.
, a printer 28 connected thereto, and a coaxial cable 29 connected to the excavator camera 12.
CRT excavation monitoring monitor screen 30, CRT connected with coaxial cable 29 as well as Hakanai camera 13
A working room monitoring screen 31 was installed, and an excavation operation panel 33 for remotely controlling the excavation mechanism 11 and adjusting the opening of an air flow rate valve 32 provided in the middle of the air supply pipe 8 was adjacent to these screens.

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

The various sensors mentioned above 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, bucket angle, rotation angle, etc., and air supply are inputted to the computer 27. Information such as the opening degree of the flow valve 32 is also input in the same manner.

Figure 4 is a flowchart showing an overview of the implementation.
The shape and dimensions of the frame, soil conditions, specifications (at the time of tolerance), and the internal pressure of the box during work based on safety-related laws and regulations are preset in the computer 27 (step-by).

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

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 installation step at the site, various quantities for the next step are calculated. Statistical processing is performed to extrapolatively estimate the resistance based on regression formulas, and calculations are performed based on empirical methods that estimate static maximum ground resistance stratified by soil type, etc. based on a large number of actual results (Stepha). .

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

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 above-mentioned subsidence is obtained by measuring soil movement status and mechanical properties for each subsidence cycle.
It is configured 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 watching 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 33 is adjusted on the excavation operation panel 33 based on the set value of the predictive calculation, and the caisson frame 1 is automatically lowered by the air control for pressure adjustment settling.

This work is to sink the caisson frame 1 so as not to cause an excessive amount or speed of sinking (step 0).

Incidentally, the caisson frame 1 also sinks slightly when the work chamber 2 is excavated. Therefore, various information obtained from the various sensors during excavation and automatic pressure adjustment settling is fed back in real time by processing by the computer 27, and the excavation and automatic settling are repeated while controlling 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 gauges 24, 24', the displacement gauge 25, etc.
Since the data is processed by the computer 27, it is possible to prevent the surrounding ground from sinking due to the sinking.

These data are stored on a floppy disk, and can be output as a form using the printer 28 if necessary.

〔Effect of the invention〕

As described above, the new caisson sinking management system of the present invention not only performs measurements using various sensors, but also uses excavation patterns to control the amount and speed of sinking, and air control when performing automatic pressure adjustment sinking. By determining these and computer processing, scientific construction management can be realized.

In addition, since excavation and air control work can be carried out in the same central control room based on the processing results, the construction site can be completely unmanned, and there is no risk of incubation disease, fire, harmful gas, or oxygen deficiency. This eliminates human accidents caused by excessive subsidence of the building frame due to caisson accidents, etc., and also increases work efficiency by saving more work time.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the New York caisson settlement control system of the present invention, FIG. 2 is a block circuit diagram of the same, and FIG. 3 is an explanatory diagram of the measurement system.
FIG. 4 is a flowchart showing an outline. 1... Caisson frame, 1a... Bottom board, 1b...
Cutting edge, 2... Pressurized air work chamber, 3... Material lock, 5... Manlock, 4, 6... Hole, 7... Compressor, 8... Air pipe, 9... Soil removal bucket, 10... Rail , 11... excavation mechanism, 11a
...Turntable, 11b...Boom, 12...
...Excavator camera, 13...Hankai camera, 14...
Water pressure gauge, 15... Rebar gauge, 16... Concrete stress meter, 17, 17'... Inclinometer, 18... Barometer, 19... Flammable gas detector, 20... Oxygen concentration detector, 21... ...Bent air temperature detector, 22...Bent air flow rate detector, 23...Bent air flow rate transmitter, 24,2
4'... Subsidence gauge, 25... Displacement meter, 26... Central management control room, 27... Personal computer,
28...Printer, 29...Coaxial cable, 30
...Drilling 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] 1. 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, and a central management control room is installed on the ground.
Inside, there is a personal computer, a printer connected to it, a CRT excavation monitoring monitor screen connected by a coaxial cable to the camera installed in the excavation mechanism, and a CRT connected by the same coaxial cable to the camera installed in the pressurized work room. In addition, there is an excavation control panel that remotely controls the excavation mechanism and adjusts the opening of the air flow valve installed in the middle of the air pipe whose end opens into the pressurized air work chamber. The excavation pattern is calculated with the caisson's resistance and load balanced by inputting the detected values from various sensors into a computer.
According to the excavation pattern, remotely control the excavation mechanism from the excavation control panel while watching the excavation monitoring monitor screen and the work room monitoring monitor screen, and then automatically sink the caisson by controlling the air supply flow rate valve from the excavation control panel. A system for managing the sinking of a pneumatic caisson, characterized in that the excavation and automatic sinking are repeated while the natural settlement and automatic settlement during the excavation are processed by a computer, and settlement management is performed by feedback.