JP2010043428A - Vehicle for producing grout, and soil improving method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle for producing grout, which enhances energy efficiency while shortening a working time, when ground is improved by using the grout. <P>SOLUTION: This vehicle for producing the grout includes a crane (2), a plant (3) for producing the grout for soil improvement, and a hydraulic pump (4) for operating the crane (2) and the plant (3) driven by an engine for traveling. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a grout production vehicle used when improving the ground using a grout, and a ground improvement method using the grout production vehicle.

  The ground improvement work is the work of injecting grout such as cement milk into the ground to increase the strength of the ground. Specifically, when the grout is cement milk, water and cement are mixed to produce cement milk. And a generator for driving the plant are loaded onto a crane vehicle provided with a crane for lifting the cement bag (usually 1 ton) packed with cement into the plant and supplying the cement to the plant. The equipment transportation process to be carried to the site, the cement supply process for supplying cement to the plant with the crane, the water supply process for supplying water to the plant, and the water and cement mixed in the plant driven by the generator Cement milk production process for producing cement milk, and cement milk for transferring the produced cement milk A construction process comprising a feeding step and a kneading step of grinding the ground with an earth auger or a rock auger, adding the transferred cement milk to the shaved portion of the earth and kneading the earth and the cement milk is there.

  Such ground improvement work, particularly residential ground improvement work that improves the ground for residential use, is often carried out in residential areas, and because such work can cause noise and vibration, early in the morning and late at night, The ground improvement work cannot be carried out due to consideration for the neighborhood, and such work is often required within a limited time (for example, between 9:00 am and 5:00 pm). In order to finish the work, it is desired to shorten the work time.

In addition, when such ground improvement work is carried out from morning to evening, it is usually necessary to carry out the cement supply process at least 10 times a day, and such work is carried out for one day with the crane engine running. As a result, the idling state may occur for a long time and fuel may be consumed unnecessarily. Moreover, global warming due to an increase in the concentration of CO ₂ contained in the atmosphere and depletion of energy resources In recent years, environmental issues such as these have been screamed, and there is a strong demand to suppress such idling conditions in consideration of the environment. In addition, it is desirable to perform an operation of turning off the engine every time work on the crane is finished.

  However, if such work is carried out, there is a problem that the work of ground improvement work becomes complicated and the work time is extended.

  In addition, equipment such as a plant and a generator loaded on a crane truck has a high mass, and the total amount of these equipment may exceed 4 tons. For example, a contractor for ground improvement works uses a crane truck of 3 tons. In this case, it may not be possible to carry all of these equipment with only one crane vehicle. In such a case, it is necessary to carry the equipment in a distributed manner. There is also a problem that it takes time and a lot of fuel for transportation is consumed.

  In view of the above demands and problems, the present invention has as one object to provide a grout production vehicle that improves the energy efficiency while reducing the working time when improving the ground using the grout, Another object of the present invention is to provide a ground improvement method for improving energy efficiency while shortening work time when ground is improved using grout.

  The present invention includes a crane, a plant for producing a ground improvement grout, and a hydraulic pump for operating the crane and the plant under the drive of an engine for traveling. In the vehicle.

According to such a grout production vehicle, the plant and the crane are driven by the same power source, so that the engine is started each time work is started on the crane, and work on the crane is performed. Since the idling state does not occur even if the operation of turning off the engine is not performed every time the operation is completed, the energy efficiency can be improved while shortening the operation time.
In addition, according to such a grout production vehicle, since the engine for traveling is a power source of the plant, it is not necessary to transport other power sources such as a generator to the site of the ground improvement work. Energy consumption during transportation can be suppressed.

  In the grout production vehicle according to the present invention, preferably, the hydraulic pump is a double hydraulic pump.

  According to such a grout production vehicle, since the plant and the crane can be driven simultaneously, there is no need to switch connection between the plant and the crane, and workability is reduced. There is an advantage of improvement. In addition, the operation of supplying cement to the plant with the crane and the operation of producing cement milk at the plant can be performed at the same time, and there is an advantage that the operation time can be further reduced. Further, since the crane can be operated without stopping the plant, there is no possibility of mixing being stopped when mixing the cement milk, so that there is an advantage that the quality of the cement milk can be stabilized.

  Further, in the grout production vehicle according to the present invention, preferably, the double hydraulic pump includes an oil amount adjusting means for adjusting the oil amount of a plant discharge port for operating the plant to be constant.

  According to such a grout production vehicle, when starting the process of supplying cement to the plant with the crane, it is possible to suppress the risk that the amount of oil in the plant discharge port decreases and the operation of the plant becomes slow, Moreover, since the oil quantity of a plant discharge port increases when stopping this process and the possibility that a plant will run out of control can be suppressed, there exists an advantage that the quality of cement milk can be stabilized.

  The present invention also lies in a ground improvement method, wherein a grout is produced using the grout production vehicle.

  As described above, according to the present invention, it is possible to provide a grout production vehicle that improves the energy efficiency while shortening the working time when the ground is improved using the grout. Moreover, according to this invention, when improving a ground using grout, the improvement method of the ground which improves energy efficiency can be provided, shortening working time.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

First, the grout production vehicle according to the present embodiment will be described.
As shown in FIG. 1, the grout production vehicle according to the present embodiment includes a crane 2, a plant 3 for producing cement milk by kneading water and cement, and driving of an engine (not shown) for traveling. In response, the double hydraulic pump 4 that operates the crane 2 and the plant 3, the oil tank 5 that contains oil for operating the crane 2 and the plant 3, and the temperature used to operate the crane 2 or the plant 3. And an oil cooling fan 6 for cooling the increased oil.

  A conventionally known double hydraulic pump can be adopted as the double hydraulic pump 4 as long as the effect of the present invention is not impaired.

  This type of double hydraulic pump 4 includes two discharge ports. Specifically, the double hydraulic pump 4 includes a plant discharge port for operating the plant 3 and a crane discharge port for operating the crane 2.

  The double hydraulic pump 4 includes oil amount adjusting means for adjusting the oil amount of a plant discharge port for operating the plant to be constant.

  As shown in FIG. 2, the plant 3 includes a cement storage unit 11 that temporarily stores cement, a cement screw conveyor 12 that transfers cement in the cement storage unit 11, and a cement that is a path through which cement is transferred by the cement screw conveyor 12. Transfer route 13, water tank 14 for storing water, water pump 15 for transferring water in water tank 14, water transfer route 16 for transferring water by water pump 15, and transfer from cement transfer route 13 A mixer 17 that mixes the transferred cement and water transferred from the water transfer path 16 to produce cement milk, a load cell 18 that measures the amount of cement transferred to the mixer 17 and the amount of water, respectively, and a mixer 17 A cement milk pump 19 for transporting the cemented milk, and a cement milk pump Hydraulic motors 21a, 21b for transmitting the power of the double hydraulic pump to the cement milk transfer path 20, the cement screw conveyor 12, the water pump 15, the mixing means 17a, and the cement milk pump 19, respectively. , 21c, 21d, and plant control means 22 for controlling the plant.

The cement storage part 11 includes a cement hopper 11a and a cement lower storage part 11b integrally connected at a lower part of the cement hopper 11a.
Capacity of the cement reservoir 11 is not particularly limited, for example, 0.2～1.0M ³ is exemplified.

The cement hopper 11a is provided with an upper opening 11c on the upper side.
The cement hopper 11a is configured to receive the cement supplied by the crane 2 from the upper opening 11c.
The cement hopper 11a is configured so that the horizontal sectional area gradually decreases from the upper opening 11c to the lower side.

  The cement lower storage portion 11b includes a lower opening 11d on the lower side surface, and is integrally connected to the cement transfer path 13 at the lower opening 11d, and the cement is transferred to the cement transfer path 13 from the lower opening 11d. It is comprised so that.

  The mixer 17 is integrally connected to the cement transfer path 13 and the water transfer path 16 above the mixer 17, and is integrally connected to the cement milk transfer path 20 below the mixer 17. .

  The mixer 17 is configured to receive cement supplied by the cement screw conveyor 12 and water supplied by the water pump 15.

  The mixer 17 includes a mixing unit 17 a that mixes the cement supplied by the cement screw conveyor 12 and the water supplied by the water pump 15.

The grout production vehicle 1 according to the present embodiment is configured such that each of the hydraulic motors 21a, 21b, 21c, and 21d is connected to a plant discharge port.
Further, the grout production vehicle 1 according to the present embodiment includes a hydraulic motor valve interposed in each of the connection portions, and any one of the hydraulic motors 21 is driven by a double hydraulic pump via the hydraulic motor valve. It is made up of.

  The grout production vehicle according to the present embodiment is formed such that the hydraulic motor 21 is detachable from the plant discharge port.

  The plant control unit 22 includes a hydraulic motor valve control unit that controls opening and closing of the hydraulic motor valve, and a control panel that controls the cement screw conveyor 12, the water pump 15, the mixing unit 17a, and the cement milk pump 19. .

  The plant control means 22 drives any one of the hydraulic motors 21 with a double hydraulic pump in order to continuously produce cement milk in a batch system, the cement screw conveyor 12, the water pump 15, the mixing means 17a, the cement milk. The pump 19 is configured to be controlled.

  The grout production vehicle according to the present embodiment is configured such that the plant control means 22 and the load cell 18 can be driven by the battery of the vehicle body.

  The grout production vehicle according to the present embodiment includes a crane valve 7 interposed between the crane 2 and the crane discharge port so that the amount of oil discharged to the crane is adjusted by the crane valve 7. Consists of.

  As the vehicle main body and the crane of the grout production vehicle according to the present embodiment, a conventionally known crane vehicle can be adopted as long as the effects of the present invention are not impaired.

  Examples of the cement milk material produced by the grout production vehicle according to this embodiment include cement and water, and an admixture is also used as necessary.

  The cement is not particularly limited as long as the effects of the present invention are not impaired. For example, Portland cement, alumina cement, blast furnace cement, fly ash cement, silica cement, alumina cement and the like are one kind. The thing which was individual or mixed 2 or more types is employable.

  The admixture is not particularly limited as long as the effects of the present invention are not impaired. For example, AE agent, water reducing agent, AE water reducing agent, high performance water reducing agent, high performance AE water reducing agent, A fluid agent, a shrinkage reducing agent, a hydration heat inhibitor, an antifreeze agent, a cryoprotectant, or the like may be used alone or in combination of two or more.

  Next, an embodiment of the ground improvement method using the grout production vehicle according to the present embodiment as described above will be described.

  The ground improvement method according to this embodiment includes a cement supply step of lifting a bag filled with cement with the crane 2 and supplying cement from the bag to the cement storage unit 11, and a water pump 15 using a hydraulic motor 21b for the water pump. A water transfer step in which water in the water tank 14 is transferred to the mixer 17 via the water transfer path 16 by the water pump 15 and the amount of the water transferred to the mixer 17 is measured by the load cell 18; The cement screw 12 is driven by the hydraulic motor 21a for the screw conveyor, and the cement is transferred to the mixer 17 via the cement transfer path 13 by the cement screw conveyor 12, and the amount of the cement transferred to the mixer 17 is loaded into the load cell 18 The mixer is driven by the cement transfer process that is measured in step 1 and the mixer hydraulic motor 21c. Then, the cement transferred in the cement transfer process and the water transferred in the water transfer process are mixed by the mixer 17 to prepare cement milk, and a hydraulic motor 21d for the cement milk pump. The cement milk pump 19 is driven to transfer the produced cement milk by the cement milk pump 19, and the ground is shaved with an earth auger, a rock auger or the like, and transferred to the earth and sand of the shaved portion. And a kneading step of kneading the earth and sand and the cement milk.

Moreover, the ground improvement method according to the present embodiment is a method of continuously producing cement milk in a batch manner.
Specifically, in the ground improvement method according to the present embodiment, the water supplied to the mixer reaches a predetermined amount under the control of the plant control means 22 (the amount of water measured by the load cell 18 becomes a predetermined value). Until the amount of cement supplied to the mixer becomes a predetermined amount (the amount of cement measured by the load cell 18 is a predetermined value). Until the cement screw conveyor is driven by the hydraulic motor for the cement screw conveyor to carry out the cement transfer process, and the mixer 17 is driven by the hydraulic motor for the mixer for a certain period of time to carry out the cement milk preparation process. Then, the cement milk pump 19 is driven by the hydraulic motor for the cement milk pump to drive the cement milk. A method for implementing a transmission process, the control of the plant control means 22, a method for sequentially carrying out these steps.

  The cement milk produced as described above has a water / powder mass ratio of, for example, 50 to 100%, and more specifically 50 to 60%.

Since the grout production vehicle according to the present embodiment and the ground improvement method according to the present embodiment are configured as described above, they have the following advantages.
That is, in this embodiment, when the plant and the crane are driven by the same power source, the engine is started every time work on the crane is started, and the work on the crane is finished. In addition, the idling state does not occur even if the operation of turning off the engine is not performed, so that the energy efficiency can be improved while shortening the working time.

  Further, in this embodiment, since the engine for traveling is a power source of the plant, it is not necessary to transport another power source such as a generator to the site of ground improvement work, and energy consumption in such transport is reduced. Can be suppressed.

  Further, in the present embodiment, the plant and the crane can be simultaneously driven by the plant and the crane being driven by the engine via the double hydraulic pump. There is no need to switch the connection between the hydraulic pump and the workability is improved. In addition, the operation of supplying cement to the plant with the crane and the operation of producing cement milk at the plant can be performed at the same time, and there is an advantage that the operation time can be further reduced. Further, since the crane can be operated without stopping the plant, there is no possibility of mixing being stopped when mixing the cement milk, so that there is an advantage that the quality of the cement milk can be stabilized.

  In the present embodiment, the double hydraulic pump is provided with an oil amount adjusting means for adjusting the oil amount of the plant discharge port for operating the plant to be constant, so that the plant discharge port is started when the cement supply process is started. This can reduce the risk that the amount of oil will decrease and slow down the operation of the plant, and when the cement supply process is stopped, the amount of oil at the plant discharge port will increase and the plant may run out of control. Since it can suppress, there exists an advantage that the quality of cement milk can be stabilized.

  Furthermore, this embodiment can be used as a crane truck by removing the plant when the plant is unnecessary because the hydraulic motor is formed so as to be detachable from the plant discharge port.

  In the present embodiment, the plant and the crane are driven by the engine via the double hydraulic pump, and the plant control means and the load cell are driven by the battery of the vehicle body. All energy can be supplemented by the engine of the car body. Furthermore, with this configuration, the present embodiment eliminates the need to transport the generator to the site, and can also suppress energy consumption during transportation.

  The grout production vehicle according to the present embodiment and the ground improvement method according to the present embodiment have the above-described advantages due to the above-described configuration, but the grout production vehicle according to the present invention and the present invention The ground improvement method according to the present invention is not limited to the above-described configuration, and the design can be changed as appropriate.

  For example, in the present embodiment, a double hydraulic pump having two discharge ports is used as a hydraulic pump. However, in the present invention, a hydraulic pump having one discharge port is used as a hydraulic pump. May be.

Although this embodiment uses cement milk, the present invention may use cement mortar or cement concrete instead of cement milk.
Examples of the material for the cement mortar include fine aggregates in addition to the material for the cement milk, and examples of the material for cement concrete include coarse aggregates in addition to the material for the cement mortar.
The fine aggregate and the coarse aggregate are not particularly limited as long as the effects of the present invention are not impaired. For example, river sand, mountain sand, land sand, crushed sand, sea sand, quartz sand, etc. One kind or a mixture of two or more kinds can be employed.

The schematic diagram of the vehicle for grout production of one Embodiment. The schematic diagram of the plant of one Embodiment.

Explanation of symbols

  1: vehicle for making grout, 2: crane, 3: plant, 11: cement storage section, 11a: cement hopper, 11b: cement lower storage section, 11c: upper opening section, 11d: lower opening section, 12: cement screw conveyor 13: Cement transfer path, 14: Water tank, 15: Water pump, 16: Water transfer path, 17: Mixer, 17a: Mixing means, 18: Load cell, 19: Cement milk pump, 20: Cement milk transfer path, 21 : Hydraulic motor, 22: Plant control means

Claims (4)

  A grout production vehicle comprising a crane, a plant for producing a ground improvement grout, and a hydraulic pump for operating the crane and the plant upon driving of an engine for traveling.   The grout production vehicle according to claim 1, wherein the hydraulic pump is a double hydraulic pump.   The grout production vehicle according to claim 2, wherein the double hydraulic pump is provided with an oil amount adjusting means for adjusting the oil amount of a plant discharge port for operating the plant to be constant.   A method for ground improvement, comprising producing a grout using the grout production vehicle according to any one of claims 1 to 3.

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