JPH0726544A - Pressure compaction device and its method of application - Google Patents

Abstract

PURPOSE:To simplify soil bearing capacity measurement and thereby shorten a pit excavation operation period by integrating a body unit and a soil bearing capacity measurement unit together and making it possible to accomplish soil bearing capacity measurement marely through visioning the index immediately after pressure compaction of the ground surface. CONSTITUTION:The ground surface 30 is compacted with pressure by a body unit 10. A loaded shaft 21 of a soil bearing capacity measurement unit 20 is then screwed in a supporting member 16 of the body unit 10. At the same time, a ground block 23 is arranged on the ground surface measuring position with its top abutting to the lower end of the loaded shaft 21. Further, load is applied to the body unit 10 by fitting a dead weight 19 of a required weight on an operation handle 15. Simultaneously, the ground surface 30 is pressed with the ground block 23 through the loaded shaft. Whether the ground surface 20 is inherent in the expected soil bearing capacity or not is judged by the sinking state of an index 29 fitted to the ground block 23. Thus judgement of the soil bearing capacity can be executed merely by visioning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamping device used when a root cutting bottom is made to have a predetermined bearing capacity in a root cutting process for constructing a foundation of a building, and a method of using the device. is there.

[0002]

2. Description of the Related Art Conventionally, in a root cutting process carried out in constructing a foundation of a building, the ground to be the root cutting bottom is pressed with a pressing device such as a rammer and a plate compactor, and then separated from the pressing device. I installed a body bearing capacity measuring device on the compacted ground and examined the bearing capacity of that part. Then, the clamping by the clamping device and the measurement by the ground strength measuring device are repeatedly performed until the root cutting bottom reaches a predetermined ground strength.

[0003]

However, since the clamping device and the ground proof stress measuring device are separate bodies as described above, the ground proof stress measuring device must be set at the measurement location every time the ground proof stress is measured. There was a problem that it was very time-consuming, such as that it had to be done and that the loading method became large-scale.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a clamping device and a method of using the clamping device that can perform the measurement of the ground proof stress of the ground after clamping without trouble. There is.

[0004]

In order to solve the above-mentioned problems, the present invention relates to a drive source arranged on a gantry, a pressure plate provided below the gantry via a vibration-proof member, An exciter arranged on the pressing plate, a power transmission means for transmitting the power of the drive source to the exciter, and a weight attached to the mount and having a required weight, which is detachably mounted. The operation handle and a support member provided on the rear portion of the gantry so as to project rearward from the gantry, and a main body portion for pressing the ground below the pressing plate, and mounting on the supporting member. A pressing device, which is freely attached and comprises a ground strength measuring unit for measuring the ground strength of the ground that has been pressed by the weight and the load of the main body, wherein the support member is provided with a screw receiving portion. The ground bearing force measuring part is screwed into the screw receiving part. A loading shaft, a grounding block arranged on the compacted ground in a state where the lower end of the loading shaft is in contact with the loading shaft, and the grounding block attached to the grounding block and loaded by the loading shaft through the loading shaft. This is used as an index for visually observing the degree of sinking of the grounding block.

Further, according to the present invention, the motive power from the drive source arranged on the gantry is transmitted to an oscillating machine on a pressure plate provided below the gantry via a vibration isolating member, so that the pressure While vibrating the clamping plate to compress the ground below the pressing plate, a main body part provided with a supporting member provided at the rear part of the pedestal so as to project rearward from the pedestal, and the support. A loading shaft is screwed to a screw receiving portion provided on the member, and a grounding block is arranged on the compacted ground with the lower end of the loading shaft in contact with the grounding block. A method of using a clamping device configured with a ground proof strength measuring unit having an index for visually observing the degree of sinking of the grounding block due to a load applied from the main body through the load shaft, wherein: Place the main body on the ground that is compressed by the main body. The load bearing shaft is screwed to the screw receiving portion, and the grounding block is arranged on the ground in a state where the lower end of the loading shaft is in contact with the upper end of the grounding block. By applying a load on the main body, the ground block is pressed by the ground block via the load shaft, and the degree of sinking of the index is determined by this pressing.

[0006]

According to the present invention, after the ground is clamped by the main body, the loading shaft of the ground bearing measuring section is screwed to the support member of the main body, and the upper end is contacted with the lower end of the loading shaft. When the grounding block is placed at the measurement position on the ground in a state of being in contact with each other, and a weight having a required weight is attached to the operation handle and a load is applied to the main body, the weight of the weight and the main body is It depends on the ground block via the load shaft. Then, the ground block presses the ground.

If the ground does not have the expected bearing capacity, the ground block is pressed to sink the ground, and the ground block sinks as the ground sinks. Sink. Further, when the ground has the expected bearing capacity, the ground and the ground contact block hardly sink. Therefore, after applying a load to the main body portion, it is possible to determine whether or not the pressed ground is submerged, that is, whether or not the ground has an expected bearing capacity, by a simple operation of visually observing the index.

Further, according to the present invention, since the ground pressure and the proof stress of the ground can be measured by one device, the proof stress of the ground measured by the proof strength measuring unit is less than the expected proof strength. In this case, the ground portion can be immediately pressed by the main body portion, and a root cutting bottom having a uniform ground bearing force can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the clamping device and the method of using the device according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing an example of the clamping device of the present invention. 1 in the figure
Reference numeral 0 denotes a main body, and the main body 10 includes a base 11 and a base 11
A drive source 12 arranged above, a pressure plate 14 provided below the frame 11 via a vibration isolating member 13 made of rubber, and an exciter 41 arranged on the pressure plate 14. The power transmission means 42 interposed between the drive source 12 and the vibrator 41, and the operation handle 15 mounted on the upper rear side of the gantry 11.
And a support member 16 provided below the operation handle 15 at the rear part of the gantry 11 so as to project rearward from the gantry 11.

A hook 18 is attached to the operation handle 15, and the hook 18 has, for example, a prismatic shape as shown in FIG. 3, and the engaging portion 1 is provided at the approximate center in the length direction.
A weight 19 having a required weight and provided with 9a is detachably attached. In the main body 10 as described above, the motive power from the drive source 12 is applied to the vibration generator 41 on the pressure plate 14 provided below the gantry 11 via the vibration isolator 13, and the pulley 4
Power transmission means 42 by 2a, 42b and belt 42c
By vibrating the pressure plate 14 to transmit the pressure plate 1
It is designed to clamp down the ground 30 under 4.

On the other hand, on the support member 16 of the main body 10, the ground bearing capacity of the ground 30 compressed by the main body 10 is measured by the weight 19 and the accumulated load of the main body 10, as shown in FIG. The bearing capacity measuring unit 20 as shown is attached in a freely attachable manner. The ground proof strength measuring unit 20 is attached to a loading shaft 21 mainly provided with a handle portion 22, a grounding block 23 described below arranged below the loading shaft 21, and a pressing unit 25 constituting the grounding block 23. And an index 29 formed of a ring or the like.

On the lower surface side of the support member 16, a cylindrical screw receiving portion 17 having an internal thread is provided in a state substantially orthogonal to the support member 16. The screw receiving portion 17 is provided. A loading shaft 21 is screwed onto the load shaft 21, and a handle portion 22 having a substantially U-shape in a side view is provided at an upper end of the loading shaft 21.

The grounding block 23 will be described in detail. It comprises a pressing portion 25 provided with a recess 24 into which the loading shaft 21 is inserted, and a screw 2 at the lower end of the pressing portion 25.
In order to stabilize the grounding portion 26 having a substantially inverted convex cross-section attached integrally with 7, and the grounding portion 26 and the pressing portion 25, the grounding portion 26 is provided so as to cover the entire grounding portion 26 and the lower side of the pressing portion 25. The grounding block 23 is arranged on the ground 30 which is clamped by the main body 10 with the lower end of the loading shaft 21 abutting the recess 24 of the pressing portion 25.

The grounding portion 26 is, as shown in FIG.
It is configured so that it can be used by attaching it to the lower end of the pressing portion 25 with a screw 27 in an inverted state. That is, it is possible to change the area of the ground contact portion 26 in contact with the target ground resistance of the ground surface 30 and set two expected ground resistance values.

The index portion 29 is attached to the pressing portion 25 at a predetermined size above the upper end of the case 28. By visually observing the index portion 29, the sinking amount of the ground block 23 is measured, and You can judge the yield strength. That is, in the ground proof stress measuring unit 20, does the index 29 sink from the upper end of the case 28 when the cumulative load of the weight 19 and the main body unit 10 is applied to the pressing unit 25 via the loading shaft 21? Whether it is, that is, the grounding block 23 can measure the subsidence amount. The size between the index 29 and the upper end of the case 28 is set based on the expected subsidence amount of the ground 30 and the load applied to the pressing portion 25, which is determined in advance within an allowable range.

Next, a method of using the pressing device constructed as described above will be described with reference to the process diagram shown in FIG. In addition,
In the steps described below, the drive source 12 is not driven. First, as the first step, the main body portion 10 is arranged on the ground bearing measurement position of the ground 30 which is the root cut bottom clamped by the main body portion 10, and then the screw receiving of the support member 16 provided on the main body portion 10 is performed. The loading shaft 21 is fitted into the portion 17, and the handle portion 22 is operated and screwed until the screw is full (second step).

Subsequently, the operation handle 15 of the main body portion 10 is lifted upward, and the lower end of the loading shaft 21 is brought into contact with the recess 24 formed at the upper end of the pressing portion 25. Then, while maintaining this state, the operation handle 15 is gently lowered, and the grounding block 23 is placed on the ground bearing measurement position of the ground 30 which is clamped.
Are arranged (third step).

In the grounding block 23, the grounding portion 26 is inverted and screwed 27 to the pressing portion 25 in accordance with the expected earth bearing strength. That is, when the expected earth bearing strength is large, the contact area of the ground contact portion 26 with respect to the ground 30 is reduced in the state shown in FIG.
Is attached to the pressing portion 25, and when the ground strength is not expected to be so large, the grounding portion 26 is attached to the pressing portion 25 in the state shown in FIG. 2 so that the contact area of the grounding portion 26 with the ground 30 becomes large.

After the third step, the operating handle 1 is quickly
A weight 19 having a required weight is attached to the hook 18 of No. 5, and a load is applied to the main body unit 10, and a load is applied to the pressing unit 25 and the ground unit 26 of the ground block 23 via the loading shaft 21 (fourth step). ). At this time, as described above, since the rear side of the pressure plate 14 of the main body 10 is arranged in a state of being lifted from the ground 30, by attaching the weight 19 to the hook 18, the pressing portion 25 of the ground block 23 is attached. And the grounding portion 26
Is applied with a cumulative load of the weight 19 and the main body 10 with the front side of the pressing plate 14 as a fulcrum. Further, the load is applied to the ground contact portion 26, so that the ground contact portion 26 presses the ground 30.

Then, after a lapse of a predetermined time from the fourth step, it is visually inspected whether or not the index 29 sinks below the upper end of the case 28 and disappears, that is, the index 29.
The degree of sinking is determined (fifth step). In addition, when the index 29 sinks from the upper end of the case 28 in the fifth step, the ground 30 that has been clamped does not have an expected bearing capacity, and therefore the ground 30 is pressed by the ground contact portion 26. Since it is determined that the grounding block 23 will sink accordingly, after removing the weight 19 from the hook 18 of the operation handle 15, the grounding block 23 is mounted on the loading shaft 2.
1, the loading shaft 21 is removed from the support member 16, and the ground 30 previously compressed is removed from the main body 10.
To tighten again. Then, after clamping, the first to fifth steps are repeated again to measure the ground yield strength.

If the index 29 is not sinking from the upper end of the case 28 and is visible, it is determined that the ground 30 that has been compressed has sufficient ground bearing strength, and therefore the weight 19 After removing from the hook 18 of the operation handle 15, the grounding block 23 is removed from below the loading shaft 21, and the loading shaft 21 is removed from the support member 16 so that it can be used smoothly at the next ground bearing measurement.

As described above, in this embodiment, the ground 3
The ground strength measuring unit 20 is removably attached to the support member 16 of the main body 10 that clamps 0, and after the ground 30 is pressed by the main body 10, the ground strength measuring unit 20 is attached to the support member 16 of the main body 10. It is possible to measure the bearing capacity of the ground 30 immediately compressed by a simple operation in which the loading shaft 21 and the grounding block 23 are attached and the weight 19 is attached to the operation handle 15.

Therefore, it is possible to shorten the construction of the root cutting process without the need for measuring the bearing capacity of the ground 30 after compression as in the conventional case. Moreover, with one pressing device, the ground 3
Since it is possible to perform both 0 clamping and ground bearing measurement, it is possible to obtain a root cutting bottom with uniform ground bearing capacity.
It is possible to reliably prevent immobile settlement of buildings. In addition, in the present embodiment, by inverting the grounding portion 26, it is possible to set two different values of the expected bearing capacity, which is very convenient.

In this embodiment, the case where the loading shaft 21 is removed from the support member 16 of the main body 10 after the measurement of the earth bearing strength has been described, but only the grounding block 23 is removed and the loading shaft 21 remains as it is. It is also possible to leave the screw receiving portion 17 screwed on.

[0025]

As described above, according to the present invention, the main body portion for compressing the ground surface and the ground proof stress measuring portion are formed. Since it is possible to immediately measure the bearing capacity of the compacted ground simply by visually observing the index of the measuring part, it is possible to shorten the construction of the root cutting process without taking time and effort to measure the bearing capacity. it can. Moreover, since it is possible to perform both compression and ground strength measurement with one device of the present invention, it is possible to impart uniform ground strength to the root cutting bottom and reliably prevent immobile settlement of the building.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a clamping device of the present invention.

FIG. 2 is a schematic cross-sectional view showing an example of a ground strength measuring unit.

FIG. 3 is a side view showing an example of a weight.

FIG. 4 is a schematic cross-sectional view of a ground proof strength measuring unit in a state where a grounding unit is inverted.

FIG. 5 is a process drawing showing an example of how to use the pressing device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Main body 11 Frame 12 Drive source 13 Anti-vibration member 14 Clamping plate 15 Operation handle 16 Supporting member 17 Screw receiving part 19 Weight 20 Ground resistance measuring part 21 Loading shaft 22 Handle part 23 Ground block 29 Index 30 Ground 41 Vibration Machine 42 Power transmission means

Claims (2)

[Claims] 1. A drive source arranged on a frame, a pressure plate provided below the frame via a vibration isolating member, a vibration generator arranged on the pressure plate, and the drive. Power transmission means for transmitting the power of the power source to the exciter, an operation handle attached to the gantry and on which a weight having a required weight is detachably mounted, a rear part of the gantry, and a rear side of the gantry. A main body portion that is configured by a supporting member that is provided in an overhanging state and that clamps the ground surface under the compression plate; and a ground resistance of the compressed ground surface that is attachable to the support member. A clamping device comprising a weight and a ground strength measuring section for measuring the load by the main body, wherein the support member is provided with a screw receiving section, and the ground strength measuring section is the screw receiving section. A loading shaft that is screwed to the load shaft, and the loading shaft on the compressed ground. A grounding block disposed with its lower end in contact with the grounding block, and an index attached to the grounding block for visually observing the degree of sinking of the grounding block due to the load applied via the load shaft. And clamping device. 2. A motive power from a drive source arranged on a gantry is transmitted to a vibrator on a squeezing plate provided below the gantry via a vibration isolating member, so that the squeezing plate is moved. While vibrating to press the ground below the pressing plate, at the rear part of the mount,
A loading shaft is screwed to a main body portion provided with a support member provided in a state of protruding rearward from the gantry, and a screw receiving portion provided to the support member, and the loading shaft is placed on the compressed ground. , A grounding block is arranged in a state where the lower end of the above-mentioned load shaft is in contact, and the grounding block has an index for visually observing the degree of sinking of the grounding block due to the load applied from the main body through the above-mentioned load shaft. A method of using a pressing device configured with an attached ground proof stress measuring part, comprising: a first step of disposing the main part on the ground pressed by the main part; and the screw receiver. A second step of screwing the above-mentioned load shaft to the portion, and a third step of arranging the ground block on the ground in a state where the upper end of the ground block is in contact with the lower end of the above-mentioned load shaft that is screwed. And the process of By virtue of this, the fourth step of pressing the ground with the ground block via the load shaft, and the fifth step of determining the degree of sinking of the index by the pressing in the fourth step. How to use the characteristic clamping device.