JPH01154914A - Controller for injection of ground improving agent - Google Patents

Abstract

PURPOSE:To prevent the occurrence of trouble at the time of anomalous injection by a method in which a pressure sending pump is operated when the operating switches of both a plant operator to supply a ground improving agent and a port operator to make injecting operation near an injector are on. CONSTITUTION:A port operator is set near an injector to operate an injection tube, and a plant operator is provided near pumps 4 and 5 to send cement milk and water from a compounding device for a ground improving agent. When the switch 11 of the plant operator and the switch 41 of the port operator are both put to work, a relay Rm is operated to actuate the pump 4. When any one of the pumps is out of order or is not yet conditioned, one of the switches 11 and 41 is turned off to stop the pump.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a ground improvement material injection control device.

[Conventional technology]

One of the ground improvement methods is the grout injection method, which is widely used in urban civil engineering. In addition, among the grout injection methods, there are usually 50 types such as the so-called column gié-not grouting method, JSG method, CCP method, die-not grouting method, etc.
An ultra-high pressure jet method is known in which injection material is injected into the ground from a small diameter nozzle at a high pressure of 100 kg/cJG or more.

This ultra-high pressure jet method involves injecting hardening cement and air into the ground at high pressure and high speed, and at the same time moving the nozzle by rotating or moving the injection iron up and down, cutting and destroying the ground structure. This is a construction method in which an artificial space is created while promoting the relationship between the ground and hardening material using the force of air, and the hardening material is then filled and consolidated. It has various advantages over low-pressure chemical injection, so it is widely used. .

Naturally, in this type of ultra-high pressure jet method, control of injection pressure and injection flow rate is extremely important in construction.

In particular, in this ultra-high pressure jet construction method, its management greatly influences the properties of the improved body created underground. Conventionally, when managing this, a worker different from the worker operating the injection machine would manage it at the grouting plant while monitoring the pressure gauge and flow meter, and if there was an abnormality, they would turn on the pump. It was due to stop etc.

However, this lacks reliability, so a pressure gauge or flow meter is installed at the hole near the injection machine, so that the operator of the injection machine can check the gauges at the hole when necessary to detect any abnormalities. If detected, the plant management personnel will be contacted to shut down the pump, which is intended to increase reliability by controlling both the grout plant and the wellhead.

[Problem that the invention seeks to solve]

It is true that under this plan, it would be possible to operate the injection machine while grasping the actual injection situation near the hole opening, and in the event of an abnormality, it would be possible for plant management workers who are unable to grasp the situation near the injection machine to As a result, detailed injection management can be performed as a whole.

However, a problem remains here. One of them is that when the injection starts, even though the setup is not completed on the hole side,
If the pump is started on the plant side, trouble will occur on the port side.

Second, injection abnormalities can occur on both the port side and the plant side, but if an abnormality occurs on one side, it is not possible to deal with the problem if the abnormality is reported to the peace side by telephone etc. Not being able to make it on time or not communicating thoroughly can also be covered up.

SUMMARY OF THE INVENTION Therefore, the main object of the present invention is to provide an injection control device in which the port side and the plant side are organically linked when starting injection and dealing with the occurrence of abnormalities, thereby preventing the occurrence of troubles. .

[Means for solving problems]

The present invention for solving the above-mentioned problems has a plant operation device attached to the plant including a pressure pump that is installed far away from the soil improvement material injection machine and responsible for supplying the soil improvement material, and a plant operation device that is installed near the injection machine. a hole operating device that is installed and has a display that detects the flow rate, pressure, etc. near the soil improvement material injection machine and displays the pumping status of the soil improvement material near the injection machine; The system is characterized by an interlock relationship in which startup starts when both the operation switch of the plant operation device and the operation switch of the port operation device are turned on, and the pressure pump stops when one of them is turned off. be.

[Effect]

In the present invention, an interlock relationship is established between the plant side and the port side. Therefore, even if the setup for starting the injection is completed on the other side, if the setup is not completed on the other side, the injection pump will not start, so troubles can be prevented. Furthermore, when an abnormality occurs, the pump can be stopped by turning off one of the pump operation switches, thereby preventing injection failures and troubles. Moreover, since the pump is stopped in response to abnormal injection conditions, there is no possibility of defective production of the improved body.

[Specific structure of the invention]

The present invention will be explained in more detail below with reference to the drawings.

Figure 1 is an overall view of the injection equipment, in which a hole operating device 3 is installed near the injection machine 2 that operates the injection pipe 1, while a ground improvement material is placed far away from the injection machine 2. A plant operating device 6 is provided for starting and stopping a milk pump 4 and a water pump 5 for pumping cement milk and water from a blending device (not shown) into the injection pipe 1 and for monitoring the injection status. It is being This plant operating device 6 is attached with a recording device 7 for processing injection records and their data.

Furthermore, the cement milk path M I-M 2 near the orifice operating device 3 and thus near the injection machine 2, the water path W,
-W2 and the air path A1→A2, a flow meter F and/or a pressure gauge P are respectively attached to detect the flow rate and pressure which are indicators of the injection status. 8 is Japanese Patent Publication No. 5
Injection tube 1 similar to that shown in Publication No. 0-61014
A detection body installed as necessary to detect the impact sound and impact vibration of the jet stream ejected from the injection pipe 1.
It is inserted into the ground parallel to the The signal from this sensing body can also serve as an indicator of the injection status according to the present invention.

The above cement milk, water, and air are supplied inside through the swivel at the base of the injection pipe 1, and are injected into the ground at high pressure and high speed from the nozzle 1a from the tip, and in the process, the injection pipe 1 rotates and The material is pulled up, and the improved body X is created.

On the other hand, as shown in FIG. 2, the plant operating device 6 is provided with switches 11.12 for starting and stopping the milk pump 4 and the water pump 5, and also includes lamps 13.14 that light up when they are in operation. It is provided. 15 is a power switch, 16 is its lamp, and 17, 18, and 19 are abnormal lamps for milk, water, and air, respectively. 21 is a recorder, and 22 is a recording target selector switch of the recorder 21. Further, a communication device 23 for communicating with the hole side is provided at the top, and is equipped with a speaker, a volume knob, a call switch, and the like.

In contrast, the orifice operating device 3 is also provided with switches 41, 42 for the milk pump 4 and water pump 5 and their lamps 43,44. 45 is the operation switch of the injection machine 1, 46 is the power lamp, 47, 48.4
9. Milk, water and air abnormal lamps. 50
is a communication device with the plant side.

Now, as mentioned above, the management of the pressure and flow rate of the feed fluid greatly influences whether or not the improved body can be successfully created.

Therefore, upper and lower limit values for milk, water, and air are determined in advance based on past experience. built-in), and when the current signal is in a stable area within the allowable upper and lower limit value range, each lamp 17 to
19 and 47 to 49 are turned off without being turned on. However, when each lamp is off, there is no need for the worker to know whether it is within the safe range or whether it is unstable but safe, and if the fluctuating process including abnormal conditions could be known, the worker could can be operated accurately.

Therefore, the hole operating device is provided with a display 60 having a large number of lamps (consisting of light emitting diodes, etc.). The lamp group in the outermost circle of each lamp is an abnormal light 51u, 6], j2 that lights up abnormally and shows red, and the lamp group one lamp group inside is an unstable light 62u that lights up in an unstable state and shows yellow. ,6
2j2, and all the lamp groups inside thereof are stably off lights 63 that turn on in a stable state and show green.

In addition, unstable lights out and abnormal lights are divided into an upper semicircle and an upper semicircle. The semicircle lights up. Furthermore, since a momentary deviation from the upper and lower limits does not immediately indicate an abnormality, a timer is built in so that the abnormality light is turned on only when the unstable state continues for a predetermined period of time, for example, 30 seconds. During this abnormality, when the limit value is exceeded, the lamp group in the upper semicircle lights up, and when the abnormality falls below the lower limit value, the lamp group in the upper semicircle lights up. To distinguish between upper and lower limits,
U and β are added next to the numbers in the code.

Further, in the event of an abnormality, the lamps 17 to 19 and 47 to 49 other than the display 60 are lit simultaneously based on the output from the comparator, regardless of whether the lamps are on the upper limit side or the lower limit side.

According to such a display device, changes in the operating status can be clearly determined, and in particular, whether it is on the upper limit side or the lower limit side can be determined, and the injection machine 1
The system does not provide useful information to the workers operating the injection pipe when controlling the elevation and rotation of the injection pipe, and appropriate instructions can also be communicated to plant management workers via communication i50.23.

On the other hand, if the preparations are completed on the plant side when the injection work starts, but the preparations are not completed on the port side, starting injection will lead to various troubles, and during the injection process, an abnormality may occur on the port side. When such problems are discovered, the fact that each material is still being pumped from the plant will lead to defects in the improved product.

Therefore, an interlock relationship is adopted between the port operating device 3 and the plant operating device 6 at the start of operation and at the time of abnormality, as shown in FIG. That is, for milk, when both switches 11 and 41 are turned on, relay Rm operates and pump 4 is activated. The same goes for water. Furthermore, in the event of an abnormality or poor readiness on either the plant side or the port side, the pump 4 can be stopped by turning off either the switch 11 or 41.

Also, as mentioned earlier, when the unstable state starts, the timer Tm operates, and if the timer Tm continues to operate for the set time (for example, 30 seconds as described above), the operating electric circuit of the pump 4 is turned off. Therefore, the pump 4 is stopped. Rm is a water relay, and Tw is a water timer.

At this point, the water pump 4 may also be stopped, and the injection machine 2 may also be stopped.
Alternatively, the lifting of the injection tube 1 may be stopped. The suspension of lifting of the injection pipe 1 is a temporary measure to prevent the injection pipe 1 from being further shifted in the event of an abnormality and the position becoming unclear during re-installation when normality is restored.

By the way, in the above display device, in addition to determining the optimal reference value, the stability region lamp group is divided into an upper semicircle and an upper semicircle, and the stable state region is divided into an over-stable region or an under-stable region. It may also be displayed. In addition, when turning on the abnormality light, the indication is made depending on whether the unstable condition has continued for a predetermined period of time, but by adding more comparators, the comparator for unstable condition and the comparator for abnormal condition are combined. It is also possible to provide an abnormal state comparator and immediately display an abnormal state when the abnormal state comparator outputs an output. Note that, as long as the indicator lights are divided in the radial direction and in the upper and lower directions, it is not necessarily necessary to arrange the indicator lights in a circular manner. Furthermore, in a relationship where the light is partitioned vertically, if one of the top and bottom is lit, the other must be off, but in a relationship where the light is partitioned in the radial direction, for example, if the light is turned off unstablely. When the stability area light is on, the stability light may be on or off. Even in the case of abnormal lights,
The same can be said for unstable off lights and steady state lights.

In the above example, when any of milk, water, and air changes from stable region to unstable region to abnormal region, the display on the display device changes and when there is an abnormality, the corresponding abnormality lamp 17 19 and 47 to 49 are lit, but additional display devices may be added so that milk, water, and air correspond to each other in a one-to-one ratio. Only one display device may be used to display changes in indicators for each injection status by selecting milk, water, and air with a selector switch.

On the other hand, in the above example, indicators of the injection status are detected and managed only at the hole opening, but a detector may also be provided on the plant side to determine and display instability and abnormalities on the plant side as well. .

〔Effect of the invention〕

As described above, according to the present invention, since the plant side and the port side are linked in an interlocking manner, it is possible to prevent troubles from occurring at the start of injection, and to quickly deal with abnormalities when they occur. Moreover, since the pump is stopped and injection is stopped in the event of an abnormality, an appropriate improved body can be created.

[Brief explanation of the drawing]

Figure 1 is an overall view of the injection equipment, Figure 2 is a front view of the plant operating device, Figure 3 is a front view of the port operating device, and Figure 4 is an outline of the interlock relationship between the plant side and the port side. It is a circuit diagram. DESCRIPTION OF SYMBOLS 1... Injection pipe, 2... Injection machine, 3... Port operation device, 4... Milk pump, 5... Water pump, 6...
・Plant operating device, 11, 12, 41.42...Pump switch, 17-19.47-49...Abnormal pump, 60...Display device, 61u, 61j2...Abnormal light, 62u, 62IV , - Unstable light off, 63u, 63A
- Stability light.

Claims (1)

[Claims] (1) Plant operating equipment attached to the plant, including a pressure pump that is installed far away from the soil improvement material injection machine and responsible for supplying the soil improvement material, and a soil improvement material injection machine that is installed near the injection machine. and a hole operating device having a display that detects the flow rate, pressure, etc. in the vicinity and displays the state of pumping the soil improvement material near the injection machine; the starting of the pressure pump is activated by the operation switch of the plant operating device. 1. A ground improvement material injection control device, characterized in that the injection control device for a ground improvement material is configured in an interlock relationship such that the pump starts when the and the operation switch of the hole operating device are both turned on, and the pressure pump stops when one of them is turned off.