JP6304540B2 - Construction management system used for high-pressure jet mixing method - Google Patents

Description

  The present invention relates to a construction management system for use in a high-pressure jet agitation method in which an improved body is created in the ground by spraying a hardener into the ground and mixing with stirring.

2. Description of the Related Art Conventionally, a high-pressure jet stirring method is known in which a hardened material is injected into a ground to be improved and mixed and stirred to create an improved body (see, for example, Patent Document 1).
Such a high-pressure jet agitation method, for example, inserts an injection rod into the ground, presses in an ultra-high pressure hardened material and compressed air, and injects the injection hole from the injection hole at the tip of the injection pipe toward the ground. The surrounding ground is cut, and the injected hardened material and the cut soil are mixed to improve the ground in the region.

  Here, in the case of the high-pressure jet agitation method, the ground is cut with ultra-high pressure jet water, and the cutting slime (mud) is discharged from the periphery of the injection rod to the ground surface by the air lift action. The mechanism does not remain inside. Usually, a ground improvement device, i.e., an injection rod insertion device is installed at the insertion point of the injection rod, and a pit for temporarily collecting waste mud is provided above the through hole for inserting the injection rod. The mud discharged inside is sucked and processed by piping extended from the vacuum car.

JP 2007-77739 A

However, the conventional high-pressure jet stirring method described above has the following problems.
For example, when ground improvement is performed directly under a foundation (structure) such as a ground tank, the ground improvement device is installed in the work space between the bottom of the tank and the foundation. It is structurally impossible to provide a pit for sludge by shaving. Therefore, construction will be done without pits, but since the mud that rises from the ground is scattered by the air lift action, it is necessary to provide a curing facility to prevent scattering, There was a problem that it took time and effort to clean the surroundings.

  In addition, when the high-pressure jet agitation method is carried out directly under the structure, abnormalities such as clogging of the mud flow path occur, and if normal mud is not blocked, the underground pressure near the injection hole of the injection rod is reduced. As a result, the energy of the high-pressure jet flow remains in the ground, and there is a possibility that the surrounding ground may be raised or cement milk may be ejected. For this reason, the worker is visually inspecting the discharge of waste mud, but there is room for improvement in this respect because it is necessary to constantly monitor during construction.

  The present invention has been made in view of the above-described problems, and can constantly detect the supply air volume of compressed air by a simple method and confirm the abnormality of the supply air volume. An object of the present invention is to provide a construction management system for use in a high-pressure jet agitation method capable of preventing the above-described problem.

In order to achieve the above object, the construction management system used for the high-pressure jet agitation method according to the present invention inserts an injection rod having an injection hole at the tip into the ground, and compresses the injection rod while rotating the injection rod. A construction management system used in a high-pressure jet agitation method in which a hardened material is jetted together with air to form a columnar improved body in the ground, the compression being connected to the injection rod and applying a jet pressure to the hardened material An air supply unit that supplies air, an air volume detection unit that detects the supply air volume of the air supply unit, and a signal that transmits a signal based on the result of comparing the air volume value detected by the air volume detection unit with a set reference value A branch part for branching the air vent pipe and the ground drain mud pipe is provided at the upper end of the underground mud drain section along the injection rod. A foreign matter collection unit that collects foreign matter For example, the said air vent pipe from the foreign matter collecting portion the ground waste mud pipe is characterized in that it is branched.

In the present invention, the supply air volume of compressed air necessary for injection can be constantly detected by the air volume detector, and the detected air volume value is compared with a preset reference value, for example, the air volume value is set. A signal can be transmitted by the signal transmission unit when it is lower than the reference value. And based on the transmitted signal, it becomes possible to stop the injection of the curing material and the supply of compressed air manually or automatically. Therefore, when clogging occurs in the drainage flow path and the underground pressure in the vicinity of the injection hole of the injection rod rises, the injection of the hardener and the supply of compressed air are immediately stopped, so the energy of the high-pressure jet is reduced. It can remain in the ground and the ground can be raised or the hardened material can be prevented from being ejected. In particular, when it is constructed directly under the structure, the bulge of the structure itself can be suppressed, which is effective.
In the case of the present invention, since the high-pressure air in the mud discharged from the ground is discharged by the air vent pipe branched at the branching portion, it is possible to prevent excessive suction of the mud.
Furthermore, in the present invention, when a foreign matter such as a piece of wood is present in the ground to be improved, the foreign matter discharged together with the waste mud is collected by the foreign matter collecting portion of the branch portion provided at the upper end of the underground waste mud portion. be able to. As a result, foreign matter can be prevented from flowing into the ground mud pipe connected to the branching portion, and time-consuming recovery work due to the ground mud pipe being clogged with foreign matter is unnecessary, thereby improving work efficiency. be able to.

  Further, according to the present invention, since the air supply amount can be confirmed by a signal from the signal transmission unit, there is an advantage that it is not necessary for the worker to always visually monitor the discharge state of the mud as in the conventional case.

  Moreover, the construction management system used for the high-pressure jet agitation method according to the present invention includes a control unit that stops the injection of the hardened material and the supply of the compressed air by the air supply unit based on a signal transmitted from the signal transmission unit. Is preferably provided.

  In this case, at the same time as the signal is transmitted by the signal transmission unit, the control unit can automatically stop the injection of the curing material and the supply of compressed air by the air supply unit. For this reason, even when the worker confirms the above-mentioned signal, it is not necessary to perform an operation of stopping the supply of compressed air by the air supply unit, so that forgetting to stop or delay can be prevented.

Also, construction management system for use in high-pressure injection stirring method according to the present invention, the foreign matter collecting portion is preferably openable lid is provided.

In the present invention, since the foreign body recovery unit is provided with a lid, when the aforementioned signal is transmitted along with the detection of the supply air volume, the injection of the curing material and the supply of compressed air are stopped, and the lid is The foreign matter in the foreign matter collection part can be easily taken out by opening.

  Moreover, the construction management system used for the high-pressure jet agitation method according to the present invention is such that at least a part of the ground mud pipe connected to the underground mud section along the injection rod can be visually observed from the outside. A tube is preferably provided.

  In this case, there is an advantage that the clogging of the ground drainage pipe can be visually confirmed from the transparent pipe, and the clogging can be detected at an early stage.

  According to the construction management system used for the high-pressure jet agitation method of the present invention, it is possible to constantly detect the supply air volume of compressed air with a simple method and confirm the abnormality of the supply air volume. Can be prevented.

It is the figure which showed typically the structure of the construction management system used for the high-pressure jet stirring method by embodiment of this invention. It is a perspective view of the branch part shown in FIG. It is a side view of a branch part. It is a top view of a branch part. It is an AA arrow directional view shown in FIG. 4, (a) is a figure of the branch part which closed the cover body, (b) is a figure of the branch part which opened the cover body.

  Hereinafter, the construction management system used for the high-pressure jet stirring method according to the embodiment of the present invention will be described based on the drawings.

Reference numeral 1 in FIG. 1 indicates that the construction management system according to the present embodiment inserts an injection rod 4 having an injection hole 4a at the tip into the ground G, and rotates the injection rod 4 while compressing air from the injection hole 4a. At the same time, it is used in a high-pressure jet agitation method in which a hardening material N is sprayed to form a columnar ground improvement body K in the ground G.
Here, the high-pressure jet agitation method of the present embodiment shows an example in which a boring hole 11 is drilled in the base 10 on the base 10 and the ground G just below the base 10 is improved using the boring hole 11. Yes.

  In the high-pressure jet agitation method of the present embodiment, the ground improvement device 1 for penetrating the injection rod 4 fitted with the tip bit into the ground G, and the high pressure for feeding the hardening material N into the injection rod 4 from the mixer 21. It is constructed by using the pump 2, the compressor 3 for sending the compressed air together with the hardening material N into the injection rod 4, and the vacuum wheel 6 for treating the discharged mud.

  The ground improvement device 1 is provided on the foundation 10 and is configured to press the hardened material N into the injection hole 4a of the injection rod 4 and inject the high pressure by the high pressure pump 2 when penetrating to a predetermined depth. ing. That is, the ground improvement body K is formed around the injection rod 4 by rotating the injection rod 4 while high-pressure injection of the hardened material N from the injection hole 4a.

  The construction management system is connected to the injection rod 4, and supplies an air supply unit (compressor 3) for supplying compressed air for applying an injection pressure to the hardened material N; an air volume detection unit 31 for detecting the supply air volume of the compressor 3; A signal transmission unit 32 configured to transmit a signal based on a result of comparing the air flow value detected by the air flow detection unit 31 with a set reference value.

  At the upper end of the underground mud draining part (boring hole 11) along the injection rod 4, a branching part 5 for branching the air vent pipe 51 and the ground mud pipe 52 is provided. As shown in FIGS. 2 to 4, the branch portion 5 has a rod support portion 53 through which the injection rod 4 can be inserted, and mouth portions 5 a and 5 b for connecting the air vent pipe 51 and the ground mud pipe 52. And a body 54 that can be opened and closed.

  The rod support portion 53 has plate members 53A and 53B provided to face the upper and lower surfaces on the upstream side of the box-shaped main body 54. The upper plate member 53A has a first opening 53a through which the injection rod 4 can be inserted. The lower plate member 53B is formed with a second opening 53b having substantially the same diameter as the boring hole 11. In other words, the clearance on the outer peripheral side of the injection rod 4 in the boring hole 11 becomes a flow path for mud (slime), and the mud flows into the main body 54 of the branch portion 5 and is connected to the main body 54. The air is discharged by 51 and the inflowing mud is sucked by the vacuum wheel 6 through the ground mud pipe 52. At this time, excessive suction of the mud can be prevented by discharging the high-pressure air in the mud discharged from the ground by the air vent pipe 51.

As shown in FIG. 4 and FIGS. 5A and 5B, the main body 54 includes a lid 55 that can be opened and closed on the upper surface of the downstream portion. You can check the status. The lid body 55 of the present embodiment is provided such that one end is fixed to the main body 54 by a hinge 55a and the other end is detachable by a bolt 55b.
In addition, the main body 54 includes a first mouth portion 5a for connecting the air vent pipe 51, a second mouth portion 5b for connecting the ground mud pipe 52, and a third mouth portion 5c provided as a spare in the present embodiment. It is equipped with.

  The ground mud pipe 52 connected to the underground mud drain part (boring hole 11) along the injection rod 4 is provided with a transparent pipe 56 (see FIG. 4) at least a part of which can be visually observed from the outside. ing.

The air volume detection unit 31 is built in the compressor 3, constantly detects the air volume of the compressed air supplied to the injection rod 4, and is connected to the control unit 7.
The signal transmission unit 32 is connected to the control unit 7 and has a function of transmitting signals such as a light emitter, an alarm device, and a display board, and is installed at a position that can be easily confirmed by an operator. And the signal transmission part 32 is controlled so that supply of the compressed air by the compressor 3 is stopped based on the transmitted signal.

As a method of managing the air volume of the compressed air by the control unit 7, when a predetermined air volume (for example, 1.5 Nm ³ / min) falls below a predetermined time (for example, several seconds), the signal transmission unit 32. And the control to stop the operation of the compressor 3 to stop the supply of compressed air.

Next, the effect | action of the construction management system used for the high-pressure jet stirring method mentioned above is demonstrated based on drawing.
As shown in FIG. 1, first, a boring hole 11 is formed at an appropriate position of the foundation 10 using a drilling machine (not shown) and communicated with the ground G immediately below the foundation 10. Next, the injection rod 4 is inserted into the bore hole 11 by the ground improvement device 1, the hardened material N is pressed into the injection hole 4 a of the injection rod 4 at a high pressure by the high pressure pump 2, and the compressor 3 is operated to generate compressed air. A ground improvement body K is formed in the ground G by supplying the injection hole 4a with a predetermined air volume (for example, 1.5 Nm ³ / min or more) and injecting the hardened material N while excavating the ground G with ultrahigh pressure jet water. . And the mud (slime) discharged | emitted from the clearance at the outer peripheral side of the injection rod 4 of the boring hole 11 is sucked and processed by the vacuum wheel 6 connected to the ground mud pipe 52 through the branch part 5.

  In the present embodiment, the supply air volume of compressed air necessary for injection can be constantly detected by the air volume detection unit 31, and the detected air volume value is compared with a preset reference value, for example, the air volume When the value is lower than the set reference value, the signal transmitter 32 can transmit a signal. The compressor 3 can be automatically stopped based on the transmitted signal. That is, at the same time as the signal is transmitted by the signal transmission unit 32, the control unit 7 automatically stops the supply of compressed air from the compressor 3. Therefore, even when the worker confirms the above-mentioned signal, it is not necessary to perform the work of stopping the supply of compressed air by the compressor 3, so that it is possible to prevent forgetting to stop or delay.

  For this reason, when the mud flow path (boring hole 11 or ground mud pipe 52) is clogged and the underground pressure in the vicinity of the injection hole 4a of the injection rod 4 rises, the supply of compressed air is quickly stopped. Therefore, the energy of the high-pressure jet remains in the ground G, so that the ground G can be raised or the hardened material N can be prevented from being ejected. In particular, when it is constructed directly under the structure, the bulge of the structure itself can be suppressed, which is effective.

  Moreover, in this Embodiment, since the air supply amount can be confirmed with the signal by the signal transmission part 32, the advantage that an operator does not need to always monitor visually the discharge | emission state of waste mud unlike the past. There is.

Further, in the present embodiment, when a foreign matter such as a piece of wood is present in the ground G to be improved, the foreign matter collecting portion 54a of the branching portion 5 provided at the upper end of the boring hole 11 removes the foreign matter discharged together with the mud. Can be recovered. For this reason, foreign matter can be prevented from flowing into the ground mud pipe 52 connected to the branch portion 5, and time-consuming recovery work due to the ground mud pipe 52 being clogged with foreign matter is not required, and work efficiency is improved. Improvements can be made.
In addition, since the foreign matter collection unit 54a is provided with a lid 55, when the above-mentioned signal is transmitted along with the detection of the supply air volume, the high pressure pump 2 and the compressor 3 are stopped and the lid 55 is opened. The foreign matter in the foreign matter collection part 54a can be easily taken out.

  Furthermore, in the present embodiment, clogging of the ground mud pipe 52 can be visually confirmed from the transparent pipe 52a, and clogging can be detected at an early stage.

  As described above, in the construction management system used in the high-pressure jet agitation method according to the present embodiment, the supply air volume of compressed air is always detected by a simple method, and abnormalities in the supply air volume can be confirmed. The eruption of the material can be prevented.

As mentioned above, although the embodiment of the construction management system used for the high-pressure jet stirring method according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit thereof. is there.
For example, in the above-described embodiment, the branch portion 5 is provided on the upper portion of the boring hole 11, but the configuration is not limited to such a configuration in which the branch portion 5 is provided.

  Further, in the present embodiment, the control unit 7 is provided so that the control for automatically stopping the operation of the compressor 3 can be performed together with the signal transmission in the signal transmission unit 32. However, the control unit 7 may be omitted. Is possible. In this case, an operator may confirm the signal transmitted by the signal transmission unit 32 and manually stop the high-pressure pump 2 and the compressor 3.

Moreover, the signal transmission reference | standard by the signal transmission part 32 can be set arbitrarily. That is, in the present embodiment, when the supply air volume (for example, 1.5 Nm ³ / min) falls within a predetermined time (for example, several seconds), the signal transmission reference is used, and control is performed with time. However, the present invention is not limited to this, and the control may be performed using only the airflow value so that the transmission reference is when the airflow is equal to or lower than a predetermined airflow value.

  Further, as a configuration of the branching unit 5, a foreign matter collecting unit 54a is provided and a lid 55 that opens and closes the foreign matter collecting unit 54a is provided. However, the foreign matter collecting unit 54a and the lid 55 may be omitted. Good. Further, in this embodiment, the branch portion 5 is provided with three mouth portions 5a, 5b, and 5c, and one of them (the mouth portion of the reference numeral 5c) is reserved, but the spare portion mouth 5c is omitted. Alternatively, a configuration in which two or more spare ports are provided may be used.

Furthermore, in the present embodiment, the transparent pipe 56 is disposed on at least a part of the ground mud pipe 52, but the transparent pipe 56 may be omitted.
Moreover, in this Embodiment, although it is set as an example which improves the ground G just under the foundation 10, it is also possible to make construction conditions without the foundation 10 applicable.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

1 Improved machine body 2 High-pressure pump 3 Compressor (air supply unit)
DESCRIPTION OF SYMBOLS 4 Injection rod 4a Ejection part 5 Branch part 6 Vacuum wheel 10 Base 11 Boring hole 31 Air volume detection part 32 Signal transmission part 51 Air vent pipe 52 Ground drainage pipe 53 Rod support part 54 Main body 54a Foreign substance collection part 55 Cover body 56 Transparent pipe

Claims (4)

Inserting an injection rod with an injection hole at the tip into the ground, and rotating the injection rod to inject the hardened material together with compressed air from the injection hole to create a columnar improvement in the ground A construction management system used in the construction method,
An air supply unit connected to the injection rod and for supplying the compressed air for applying a spray pressure to the hardened material;
An air volume detection unit for detecting the supply air volume of the air supply unit;
A signal transmitter that transmits a signal based on a result of comparing the airflow value detected by the airflow detector with a set reference value;
Equipped with a,
At the upper end of the underground mud drain along the injection rod is provided with a branch that branches the air vent pipe and the ground mud pipe,
The branching section is provided with a foreign matter collecting section for collecting foreign matters in the mud, and the air vent pipe and the ground mud pipe are branched from the foreign matter collecting section. Construction management system used for   2. The high pressure according to claim 1, further comprising a control unit configured to stop the injection of the hardened material and the supply of the compressed air by the air supply unit based on a signal transmitted from the signal transmission unit. Construction management system used for the jet agitation method. Wherein the foreign matter collecting portion, construction management system for use in high-pressure injection stirring method according to claim 1 or 2, characterized in that openable lid is provided. Wherein the ground waste mud pipe connected to ground waste sludge portion along the injection rod according to claim 1 to 3, characterized in that visible transparent tube tube at least partially from the outside is provided A construction management system used in the high-pressure jet stirring method according to any one of the above.

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