KR20210143533A - Ground standard penetration tester that easy to assemble on field - Google Patents

Abstract

The present invention relates to a ground standard penetration tester capable of being easily assembled on site, and more specifically, relates to a ground standard penetration tester capable of being easily put into a place where it is difficult to put a standard penetration tester for ground investigation due to the narrowness of a construction site. The ground standard penetration tester of the present invention comprises: a frame capable of being easily foldable; a winch installed at the upper center of the frame; a drive hammer lifted by the winch and freely falling; and a rod installed through the center of the drive hammer, and having one side vertically inserted into the lower ground, and a horizontally formed knocking head, to which the drive hammer is impacted, at the center part.

Description

Ground standard penetration tester that easy to assemble on field

The present invention relates to a ground standard penetration tester that is easy to assemble on-site, and more particularly, to a ground standard penetration tester that is easy to put into a place where it is difficult to put a standard penetration tester for ground investigation due to the narrowness of the construction site. will be.

The strength of the lower ground on which the building is installed is a very important factor in maintaining the stability of the building, and in general, tests are conducted to determine the type of the ground or its bearing capacity before starting construction.

In particular, the standard penetration test is one of the test methods for grasping the bearing capacity of the ground. By measuring the number of free fall times required to penetrate a heavy object as much as a preset value by free-falling it, it is possible to grasp the physico-mechanical properties such as the bearing capacity of the ground and the ground. It is commonly used to recover samples of samples.

For this standard penetration test, an automatic drilling rig equipped to allow free fall of a heavy object is used. The drilling rig cannot be used in a narrow area where it is difficult to enter the drilling rig or in an area where it is difficult to install the drilling rig due to safety or space issues. There was no problem.

In this case, it is possible to install a manual type, not an automatic type, but there is a difficulty in transporting it due to a heavy object. There was a problem that it was difficult to trust.

US 10-1447197 B1 US 10-1265437 B1

The present invention was invented to solve the above problems, so that the ground standard penetration test is performed even in a place where automatic drilling equipment is difficult to access, but it is easy to move and easy to assemble on-site to obtain reliable test results It aims to provide a ground standard penetration tester.

Objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood from the description below.

Ground standard penetration tester for easy on-site assembly according to the present invention for achieving the above object includes a frame that is easy to fold; a winch installed in the upper center of the frame; a drive hammer that is lifted by the winch and freely falls; and a rod installed to pass through the center of the drive hammer, one side of which is vertically inserted into the lower ground, and a knocking head in which the drive hammer is impacted in the center is horizontally formed.

In addition, the drive hammer, a plurality of metal weight plates having a rod insertion hole formed in the center and bolt holes formed on both sides of the rod insertion hole to be stacked; a U-bolt that is installed through the bolt hole so that the curved part is located on the upper part; and a plurality of nuts that are fastened to the threads of the U-bolt and are in close contact with the upper and lower portions of the weight plate stacked.

In addition, a separable sampler is further provided at one end of the rod vertically inserted into the lower ground.

In addition, the weight plate is technically characterized in that it is made of stainless steel.

In addition, the winch is technically characterized as an electric winch.

The present invention according to the above configuration can expect the following effects.

Since the ground standard penetration test can be performed in places where it is difficult to perform the ground standard penetration test by the automatic drilling equipment, stable construction of buildings can be made easily.

Since customized construction can be made according to the characteristics of the ground, the possibility of trial and error in application of the process is reduced, so that the construction period of the building can be shortened, and ultimately, the construction cost can be reduced.

Because the components are easy to move, the ground standard penetration test can be performed quickly, and since each component can be separated and combined, the possibility of safety accidents or musculoskeletal disorders that can occur during rapid installation, disassembly and transportation can be significantly reduced. .

The reduction in the possibility of safety accidents or the rapid installation and disassembly can ultimately have the economic effect of shortening the construction period.

Ultimately, it can be possible to construct a solid building by implementing a reliable ground standard penetration test.

1 is an overall configuration diagram of a ground standard penetration tester that is easy to assemble on-site according to a preferred embodiment of the present invention.
2 is a block diagram of a bracket according to a preferred embodiment of the present invention.
3 is a block diagram of a drive hammer according to a preferred embodiment of the present invention.
4 is a configuration diagram of a weight plate according to a preferred embodiment of the present invention.

Hereinafter, it will be described in detail with reference to the accompanying drawings of a ground standard penetration tester that is easy to assemble on site according to a preferred embodiment of the present invention.

1 is an overall configuration diagram of a ground standard penetration tester that is easy to assemble on-site according to a preferred embodiment of the present invention, FIG. 2 is a configuration diagram of a bracket according to a preferred embodiment of the present invention, and FIG. 3 is a preferred embodiment of the present invention 4 is a configuration diagram of a drive hammer according to an embodiment and FIG. 4 is a configuration diagram of a weight plate according to a preferred embodiment of the present invention.

The ground standard penetration tester, which is easy to assemble on site according to a preferred embodiment of the present invention, consists of a frame 100, a winch 200, a drive hammer 300 and a rod 400 as shown in FIG.

First, look at the frame 100 .

The frame 100 is a configuration that supports the entire configuration, and may serve as a support on which a winch 200 to be described later can be installed.

The frame 100 is made of a plurality of bars 110 and may be configured in any shape as long as it provides stable support after installation. Let's assume and explain.

One side of each bar 110 may be coupled by a bracket 130 , and the other side may be supported on the ground.

The bracket 130 is formed by hinged coupling of a plurality of fixing parts 131 to which each bar 110 is inserted and fixed, and is pressed and fixed in contact with the outer surface of the bar 110 inserted into the fixing part 131 . An appointment bolt 133 may be provided.

A ring portion 135 projected downward may be formed at the center of the bracket 130 .

The ring portion 135 serves to allow the winch 200 to be described later to be installed, and may be preferably formed in the center of the bracket 130 in consideration of the stability of the overall configuration.

Next, look at the winch 200 .

The winch 200 is a generic term for a tool for facilitating hoisting and unloading of a heavy object using the pulley principle, and may serve to pull the hoisting and unloading of the drive hammer 300 to be described later.

The winch 200 is generally provided with a hook 210 (Hook) in the upper and lower portions, the upper hook 210 is easily installed and detached from the ring portion 135 of the frame 100 described above, and the lower The hook 210 of the drive hammer 300 to be described later may be installed.

Preferably, the winch 200 is electrically configured to easily hoist the drive hammer 300 to be described later.

In addition, the winch 200 may be provided with a function of completely removing the binding force on the heavy object at once so that the drive hammer 300 , which is a heavy object, can freely fall from a predetermined position.

Next, look at the drive hammer 300 .

The drive hammer 300 is hoisted upward by the above-described winch 200 and strikes the knocking head 410 of the rod 400 to be described later by free fall, so that the ground standard penetration test can be performed. .

The drive hammer 300 may include a weight plate 310 , a U-bolt 330 , and a nut 350 .

A rod 400 to be described later passes through the center of the drive hammer 300 , so that the drive hammer 300 may be guided by the rod 400 to hit the knocking head 410 .

The drive hammer 300 is composed of the heaviest of the entire configuration, but it is made by combining a plurality of weight plates 310 so that it can be easily moved.

In detail, the weight plate 310 may have a rod insertion hole 311 formed in the center, and bolt holes 313 may be formed on both sides of the rod insertion hole 311 .

The weight plate 310 may be configured in various shapes, but it may be preferable to have a circular shape in terms of pulling a uniform impact to the knocking head 410 .

The rod insertion hole 311 is formed through the center of the weight plate 310 , and a rod 400 to be described later passes through and may serve to guide the drive hatch by the rod 400 .

Bolt holes 313 are formed on both sides of the rod insertion hole 311 so that a U-bolt 330, which will be described later, passes through, so that a plurality of weight plates 310 can be overlapped and coupled.

The bolt hole 313 is formed to be deflected to one side rather than the center of the weight plate 310 so that interference with the rod 400 does not occur when the U-bolt 330 is coupled.

Each weight plate 310 has both the rod insertion hole 311 and the bolt hole 313 as described above, so that the weight plate 310 can be easily coupled when the weight plate 310 is overlapped and installed.

Additionally, the weight plate 310 is formed of a stainless material, and a plurality of weight plates 310 are formed as a factor of 60 so that the total weight of 60 kg can be combined, 15 or 20 kg that the operator can move without additional tools It may be preferable to form a

The above-described weight play may be formed to overlap, and a U-bolt 330 may be installed through the bolt hole 313 formed in the weight plate 310 to be coupled thereto.

The U-bolt 330 may be formed in a U-shape by bending to collectively refer to a thread 331 formed at both ends.

When the weight plate 310 is coupled by the U-bolt 330, both ends of the U-bolt 330 are installed through the weight plate 310, and the curved portion may be coupled to be positioned on the upper portion.

Due to this coupling form, the drive hammer 300 may be hoisted and free fall by being caught on the hook 210 of the winch 200 described above.

A thread 331 may be formed in the U bolt 330 , and when coupled to the weight plate 310 , the thread 331 is formed at both ends positioned under the weight plate 310 , and the weight plate 310 . A screw thread 331 may also be formed on the body of the U-bolt 330 located on the upper portion.

Since a plurality of nuts 350 may be fastened to the screw thread 331 , the upper and lower surfaces of the weight plate 310 may be firmly coupled by the nut 350 .

Additionally, the U-bolt 330 has a weight of 3.5 kg, so that the reference weight of the drive hammer 300 used in the ground standard penetration test with the combination with the above-described overlapped weight plate 310 is 63.5 kg. can be formed

Looking at the assembly sequence of the drive hammer 300 based on the above-described structure, after fastening the nut 350 to the screw thread 331 formed on the body of the U bolt 330 first, both ends of the U bolt 330 are weighted. The plate 310 is penetrated through the bolt hole 313 .

According to the combination of the weight plate 310, three or four weight plates 310 are overlapped so that the total weight is 60 kg, and the screw thread 331 formed at both ends of the U-bolt 330 that is penetrated is a nut 350. to conclude

The nut 350 fastened in this way is fixed using a wrench, etc., but the nut 350 located on the upper portion of the weight plate 310 is locked downward, and the nut 350 located on the lower portion of the weight plate 310 is By locking upward, the locking of the weight plate 310 can be made more robust by the interaction of the upper and lower nuts 350 .

Finally, look at the rod 400 .

Since the rod 400 is located at the center of the entire configuration, the above-described drive hammer 300 serves to guide the falling direction during free fall, and may serve as a reference point for measuring the length at which the end is inserted into the ground.

One side of the rod 400 is vertically inserted into the lower ground, and the knocking head 410 in which the drive hammer 300 is impacted may be horizontally formed in the center.

The rod 400 may have any shape, such as a circular rod or a rectangular rod, but is preferably formed in a circular rod in consideration of the shape and ease of installation of the drive hammer 300 described above.

When the rod 400 is vertically installed, the length of the rod 400 positioned above the knocking head 410 is formed to be 0.76 m or more, so that the drop distance of the drive hammer 300 during the ground standard penetration test is 0.76 m. can be secured.

Additionally, a detachable sampler 500 may be further provided at one end of the rod 400 inserted into the ground.

When the sampler 500 is inserted into the sampler 500 when the rod 400 is inserted into the ground by the drive hammer 300 hit by the knocking head 410 of the rod 400, the ground is inserted into the sampler 500, so that the configuration of the ground can be known. can play a role in making

Using the above-mentioned components, we will look at how to conduct a ground standard penetration test.

The present invention can be used in a narrow area or an area where it is difficult to install a drilling rig.

First, the folding frame 100, which is easy to move, is installed in a place where the ground standard penetration test is to be performed.

The bracket 130 is positioned in the upper center of the frame 100 , and the winch 200 is installed by hooking the upper hook 210 of the winch 200 to the ring part 135 of the center.

A drive hammer 300 is installed on the lower hook 210 of the winch 200, and the drive hammer 300 is installed to overlap the weight plate 310 as described above and to the U bolt 330 and the nut 350. to make a strong bond.

The rod 400 is inserted into the rod insertion hole 311 located at the center of the drive hammer 300 , and the knocking head 410 of the rod 400 is located below the drive hammer 300 .

A sampler 500 may be additionally provided at the lower end of the rod 400 .

After the drive hammer 300 raised by the winch 200 is hoisted up to 0.76 m specified as the drop distance during the ground standard penetration test, the drive hammer 300 is the rod 400 by releasing the binding force of the winch 200 at once. Guided by , but free fall.

The free-falling drive hammer 300 strikes the knocking head 410 of the rod 400 so that the rod 400 is inserted into the ground.

The sampler 500 is also inserted into the ground together with the rod 400, and the sampler 500 collects a ground sample therein.

The strike by the free fall of the drive hammer 300 described above is repeated, and by measuring the number of strikes until the rod 400 is inserted 0.3m into the ground, it is a ground standard penetration test that can estimate the bearing capacity of the ground. get results.

The above-described embodiments are merely exemplary, and those of ordinary skill in the art can variously modified other embodiments therefrom.

Therefore, the true technical protection scope of the present invention should include not only the above embodiments but also other embodiments variously modified by the technical spirit of the invention described in the claims below.

100: frame
110: bar
130: bracket
131: fix part
133: fastening bolt
135: ring part
200: winch
210: hook
300: drive hammer
310: weight plate
311: rod insertion hole
313: bolt hole
330: U bolt
331: thread
350: nut
400: load
410: knocking head
500: sampler

Claims (5)

foldable frame;
a winch installed in the upper center of the frame;
a drive hammer that is lifted by the winch and freely falls; and
A ground standard penetration tester that is easy to assemble on-site consisting of a rod installed to penetrate the center of the drive hammer, one side of which is vertically inserted into the lower ground, and the knocking head to which the drive hammer is impacted in the center is horizontally formed. According to claim 1,
The drive hammer,
a plurality of metal weight plates having a rod insertion hole formed in the center and bolt holes formed on both sides of the rod insertion hole to be stacked;
a U-bolt that is installed through the bolt hole so that the curved part is located on the upper part; and
Doedoe fastened to the screw thread of the U-bolt, the ground standard penetration tester for easy on-site assembly, characterized in that it consists of a plurality of nuts that are in close contact with the upper and lower parts of the weight plate stacked. 3. The method of claim 2,
A ground standard penetration tester with easy on-site assembly, characterized in that a separable sampler is further provided at one end of the rod vertically inserted into the lower ground. 3. The method of claim 2,
The weight plate is a ground standard penetration tester that is easy to assemble on-site, characterized in that it is made of stainless steel. According to claim 1,
The winch is a ground standard penetration tester that is easy to assemble on-site, characterized in that it is an electric winch.

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