KR200358930Y1 - JV pilot pile for digging rock - Google Patents

Abstract

Ordinary steel panels, which correspond to the rear end of special fixtures filled with dozens of high hardness button chips on the ends of steel pipes, H-shaped steel, and steel pipes of high-strength special steel plates (Erden steel), Steel pile and pile of H-shaped steel pipe (steel pile) welded to each rear end and integrated. Steel plate and H-shaped steel, Steel pipe-shaped steel pile and welded pile and steel pile. The steel pipe in the longitudinal direction to the inner surface (groove) relates to a pile for the JV pilot method by welding a plurality of water pipes with nozzles in the longitudinal direction of the outer surface (pipe outer surface).

Description

Rock crusher Jeep pilot file {JV pilot pile for digging rock}

The present invention relates to a pile used in rock drilling JV pilot method (line drill excavation method), more specifically, a relatively short constant length based on a high-strength special steel plate (strength 500 ~ 600㎏ gf / ㎠, Oerden steel) Steel plate of the same size that matches the other end of the special jig which is filled by arranging the high-strength button chip (hardness HRC 90 ~ 91) on the one end of the steel sheet (sheet pile), H-shaped steel, and steel pipe in a technically proper position, A pile for JV pilot method in which a water pipe is welded in the longitudinal direction of a pile (pile) welded to one end of an H-section steel and a steel pipe. The pile is a vibrating vibr hammer and a high-pressure large-capacity zeta (pressure 150 kg f /). ㎠, discharge amount 800ℓ / min or more), the rock is raised after the first hole, the pile is pulled up, and the index, earth clogging hypothesis or support pile is inserted into the excavation hole formed at the same position to be a vibrating vibr. Rock-implanted JV pilot method that enables the drilling of various piles to rock bed (uniaxial compressive strength: 300 ~ 600㎏ gf / ㎠) by repeatedly carrying out this work. It's about files.

Recently, the JV method, which uses a combination of a vibrating hammer (vibrohamma) and a high-pressure jet injection pump (high pressure jetta), has been widely used in the construction of various piles on hard and viscous difficult grounds. The principle is that in the viscous laying method using vibration by vibrohamma in clay or hard gravel layer such as clay, liquefaction due to vibration does not occur in the composition of soil in clay layer but rather by vibration of composition particles It causes harder solidification and increases the frictional resistance around the pile tip piles.

In addition, in the gravel layer, when the groundwater level is low or the amount of groundwater is low, the ground wettability is low. When the vibration is applied to the ground, the ground is firmly hardened by the vibration and the resistance around the pile tip is high.

In addition, in the strata where a lot of stones and aldols are mixed, the vibrations of the pile vibration and Vibrohamma alone do not push the stones and aldols to the side and are firmly solid.

As this happens, it becomes impossible to drive it into aldol. In order to solve this problem, by using high pressure zeta in combination with Vibrohamma, a large amount of water and high pressure water (jet jetting water) are sprayed on the ground, thereby increasing the vibrating force of Vibrohamma and the high pressure jet jet water. The JV method is a method that allows piles to be embedded in difficult and difficult grounds by creating and softening the ground.

However, even with this JV method, it was impossible to drive a pile into a rock layer (250 kgf / cm 2 or more) including weathered rock.

In order to make this possible, first, the pressure of the jet jet water must be greater than or equal to the strength of the rock and the quantity must be large. It is technically possible to manufacture such a high pressure large-capacity zeta, but because of the enormous price of equipment after completion, it cannot be accepted even in view of construction unit price or economic aspect. Due to this situation, the construction cost for the above-mentioned difficult rock foundation is significantly high, and there is environmental pollution such as noise and vibration, and drilling by bit using downjaer Ahamma, which is difficult to secure the bearing capacity of the pile, It may have been performed by another construction method.

The present invention provides a pile welded special jig used for rock drilling JV pilot method (ship excavation method) that can solve the problems of conventional rock drilling methods and can significantly reduce the construction cost and secure economic feasibility. Environmental pollution due to noise, vibration, and ground subsidence can be reduced, and it can be embedded in a rock layer having a strength of at least 250 to 700 kg f / ㎠. The problem caused by excessive holes drilled by bites in the placing of this pile, such as temporary piles used in the ball, forms holes similar to the cross-sectional shape of various types of piles, and in addition to the tip bearing capacity of the piles secured on the support base, It is possible to secure enough friction support by friction and to confirm the allowable bearing capacity of the pile as a whole. The Hebrews can not see the rock construction that allows the pilot process for the JV (seonhang Excavation Method) file aims to provide.

Figure 1a is a perspective view showing a steel plate (sheet pile) pilot pile according to the present invention

Figure 1b is a perspective view of the H-shaped steel pilot pile according to the present invention

Figure 1c is a perspective view showing a steel sheet pilot pile according to the present invention

Rock pile for JV pilot method according to the present invention is a dozen pieces of hardness HR 90-91 on one side of steel sheet, H-shaped steel, steel pipe of constant length It is a pile in which ordinary steel sheet (sheet pile), H-shaped steel, and steel pile (pile) of steel pipes, which have the same cross-section with the rear end of special fixtures filled with button chips, are integrated by welding with the rear ends of the jig. H-steels are piled in close contact with several water pipes with nozzles in the longitudinal direction of the inner (groove) surface and in the longitudinal direction of the outer surface (outer surface) of the steel pipe. can do.

As shown in the drawings, as shown in Figs. 1A, 1B, and 1C, the steel sheet (sheet file) JV pilot file (A), H-beam steel JV pilot file (B), and steel pipe JV pilot file (C) will be respectively shown. A1, B1, C1 are each jig, A2, B2, C2 is button chip, A3, B3, C3 is nozzle, A4, B4, C4 is water pipe connected to each nozzle, A5, B5, C5 is Welds A6, B6 and C6 are steel piles (piles) of steel plates (sheet piles), H-beams and steel pipes.

Above, the water pipes (A4, B4, C4) are extended to the rear end of each pile and connected to the high-capacity high-pressure pump, and the tip of the nozzles (A3, B3, C3) connected to the water pipe is raised with HF800, and then Tangalloyo: cemented carbide is placed thereon. ), The tip of the nozzle is located 5cm ~ 10cm behind the tip of the jig according to the characteristic strength of the rock, and the special jig (A1), H-beam special jig (B1), and steel pipe-type jig (C1) Button chip formed at one end of the) is also made of cemented carbide material with hardness HR 90-91, and the number of button chips is somewhat flexible by adjusting the distance of button chips according to the strength of the arm.

As a result of the above pile, when the JV pilot method is used, the special jig filled with the button chip is welded to the lower end of the sheet pile and is vibrated and the gold of the rock is cracked due to the strong impact between the gold and the gold. Excavation and shock wave make the opening of the joint more advanced and sharper.

In this case, the vibration point strike is performed by the button which is filled at a certain interval, and thus, the strength of the impact force, that is, the impact wave intensity band, is generated in the rock (surface).

The cracks in the arm make the opening larger and sharpen the potential cracks due to the impact force and shock wave.

High pressure jets enter the gap between the arms, but blow off the rock fragments with high pressure jets to enlarge the sharper cracks. This can be referred to as the wedge effect of the high-pressure fractionated water.

● The part between the button and the button chip remains as a rocky part of the protrusion, but this part is easily broken by the mother-in-law, the Jardin River.

By filling the array at proper intervals using the button chip, it is possible to make a point strike on the plane of the arm, creating a strong and weak band of impact force and shock wave in the plane of the arm. It works to enlarge or sharpen.

In addition, the rock wool becomes uneven by hitting, thereby significantly increasing the ability to break the Oderden steel base material that hits the protrusions.

Due to the repeated implementation of the vibration hitting having the above functions and actions, the JV pilot pile is able to crush and excavate the soft rock layer and easily start drilling holes in the cross-sectional shape in the rock (inside).

In addition, when compared with the conventional pile placing method, another function that can be obtained in rock drilling with the pile according to the present invention

㉮ In case of supporting pile

● Pasting (conventional method) by air hammer to downjaer using the bit

This can be drilled by a bit with a high-strength rock excavation method when it can not be ground with a conventional general construction method or pile, so that the perforated hole is formed much larger than the pile, and there is a concern that the friction around the pile is reduced. In addition, since the inside of the steel pipe is in a common state, the pile must be piled up for the holding of the bearing capacity and the pressure-bearing strength of the steel pipe, and the soil must be filled again in the pile. In addition, during the drilling process, the collapse of the hollow wall occurs due to the high-pressure air exhaust emitted from the hammer, and after the drilling, the soil piles up on the bottom of the hole and the pile cannot be placed up to the support base. Becomes difficult. In order to preserve this, grout injection must be performed at the tip of the pile at the bottom of the pile to prevent the collapse of the empty wall.

Poured by JV Pilot Pile:

When the steel pipe supporting piles are cast, the design depth is firmly placed in the underground, and holes similar to the tip cross-sectional shape of the steel pipe piles are grounded, and in addition to the end bearing capacity of the piles secured on the support base, Due to this, the frictional bearing capacity can be sufficiently obtained, and it is possible to reliably hold the allowable bearing force that the pile must have overall.

경우 In the case of temporary piles used for exponential walls and earthwork

Here are examples of the usage and usage of various piles, especially for the construction of waterworks and closed wall temporary construction for construction in rivers.

Because many problems in construction can be seen clearly. The point required for the construction of the exponential wall closing construction is

● Index being done surely

● The exponential walls have a bearing wall for external hydraulic pressure (manual hydraulic pressure).

To achieve these two demand points

① When driving a pile, it is important to drive the pile as vertically as possible. Because of the increase in the verticality of the pile, the number of the piles (interlocking) resistance is low, it can prevent the melting of the heat of the water to close the water can be prevented from leaking after closing. In addition, since the number and the engagement of the number can be accurately, it is possible to reliably hold the pressure-bearing capacity of the wall.

② After closing the exponential wall, the internal water is discharged. At this time, a waterproof membrane (protective layer) should be formed on the outer periphery of the lowermost part to prevent reverse inflow of water from the outside, that is, hebbing phenomenon.

Whether the above two are secured or not in the construction method will be an important point.

[When applied by Downjaair hammer using bit: Conventional method]

When pouring sheet VI of type VI, the hole diameter of hammer is Φ530, so that the cross section area of the sheet pile and the hole after drilling is 110 cm2 vs 1,165 cm2, and the actual hole cross-sectional area required 15 times as large holes are made. Thus, the pile is built up into these useless large holes. This result

① Pegs and water walls are self-reliant and have problems with holding pressure bearings.

② It becomes difficult to form waterproofing and protective layer to prevent hibing.

In order to compensate for the above problems, after laying the pile, a large amount of earth and sand should be filled in the perforated huge space, and the bottom end of the pile must be crowd-filled to achieve the purpose required by the design. You will not be able to.

[When pouring by the JV pilot file]

The hole drilled by the pilot pile is about 2 times less than the cross-sectional area of the pile, and the ground hole phenomenon is similar to the cross-sectional shape of the pile, so the work process for placing the pile is as follows. Can easily achieve the purpose required by the design.

● As the pile of the base into which this pile is driven is reduced in the tip resistance, the surrounding friction resistance and the water pipe resistance, the pile can be driven vertically and the vertical degree can be kept high.

● The pile driving time is greatly shortened, which prevents the dissolution of water due to the frictional heat of the water pipe.

As there is little space (interval) between the hole which I started and the pile which I built up

① When the construction starts, the scattered soil and the crushed pieces, which are blown off by jet jet water, are automatically pulled due to the pressure gap and filled to fill the space as the pressure band stored in the hole is lost.

② After the pile is poured, the soil is filled with the flow of water to fill the gap between the space and the water pipe.

Therefore, the self-reliance of the pile and the index wall (holding pressure-bearing capacity) and the lower part of the pile are easily formed waterproof and protective film, it is possible to obtain a clear anti-hub effect and index effect.

JV pilot method pile according to the present invention can be grounded high strength soft rock layer that can not be solved by any pile construction method other than the conventional method of drilling by downja air hammer using a bit, and at the same time excavation of high strength soft rock layer Solve the problem of the drilling method by the downjaer air hammer using the bit, and can form the excavation hole suitable for the pile (bone pile), eliminating unnecessary work such as earth and sand burial, prevention of collapse of the wall, injection of chemical liquid, grout, etc. Of course, in addition to the support of the tip of the pile (pile), it is possible to secure a sufficient bearing capacity due to the pile, such as enough to obtain the frictional support due to the frictional force around the pile.

In addition, it can be called a pile for rock foundation JV pilot method, which can economically reduce air pollution, reduce construction expenses, and greatly reduce environmental pollution such as air pollution caused by noise and vibration and dust.

Claims (2)

Relatively short length of steel plate (sheet pile), H-shaped steel made of high-strength steel plate (Earden steel), and special jig rear end filled with dozens of button chips with hardness HR 90-91 The steel plate, H-shaped steel, and the end of the steel pile (pile) of the steel pipe welded together to integrate the cross-section.The steel plate and the H-shaped steel have the inner side (groove) surface in the longitudinal direction, and the steel pipe has an outer surface (pipe). Pile for piles (JV pilot method) for rock adhesion by welding several water pipes with nozzles in the longitudinal direction of the outer surface) The pile for rock adhesion JV pilot method according to claim 1, wherein the button chip and the nozzle are made of cemented carbide.