JP2001152453A - Device and method for pressing-in pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for pressing in a pile, by which the pile is pressed easily into a ground, in which an obstruction such as a boulder, a boulder stone or the like is mixed, and pile-jacking workability can be improved. SOLUTION: In the pile press-in device, a water-jet injection nozzle 15 is installed at the front end section in the press-in direction of a pile 6 itself for splitting and breaking and crushing an obstruction 13 to pile press-in such as a boulder, a boulder stone or the like mixed in a ground 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wide-width steel sheet pile, H
The present invention relates to a pile press-in device and a pile press-in method applicable to driving a pile such as a steel sheet pile, a steel pipe sheet pile, and a PC wall into the ground.

[0002]

2. Description of the Related Art Conventionally, an electric or hydraulic vibratory hammer, a press machine combined with an earth auger, a hydraulic press-drawing machine and the like have been used for a pile press-in device (construction machine) and a pile press-in method. 2. Description of the Related Art Conventionally, using such a pile press-in device, an operation of driving piles such as wide-width steel sheet piles, H steel sheet piles, steel pipe sheet piles, and PC wall bodies into the ground has been performed.

[0003]

However, obstacles such as cobblestones, boulders, and gravel are sometimes mixed in the ground, and a conventional pile press-in device is used in hard grounds that are mixed with these boulders, boulders, and the like. When trying to press-fit a pile, the pile that is pressed due to the resistance of large boulders, boulders, etc., is displaced obliquely with respect to the vertical direction, or is displaced with respect to the construction planning line. Because it falls, it is not easy to press the pile into the ground with cobblestones and boulders,
There is a problem that the efficiency of the pile press-in operation is reduced. Also,
Vibration at the time of pile injection is large, and the resulting noise is also loud, which is an environmental problem for nearby residents.

The present invention has been made in view of the above circumstances, and an object of the present invention is to crush obstacles with high-pressure water when a pile is pressed into a ground containing obstacles such as boulders and boulders. Another object of the present invention is to provide a pile press-in device and a pile press-in method which can be crushed to facilitate press-fitting and improve work efficiency of pile press-fitting.

[0005]

According to a first aspect of the present invention, there is provided a pile press-fitting device, wherein a water jet injection nozzle is provided at a tip end of the pile in the press-fitting direction, and the high-pressure water mixes the pile with a cobblestone, a boulder or the like. It is characterized by breaking up press-fitting obstacles.

According to a second aspect of the present invention, in the pile press-in device, the pressure of the high-pressure water of the water jet is 1500 kg / w.
It is characterized by being in a range from square centimeters to 5000 kilogram weight / square centimeter.

The pile press-in device according to claim 3 is characterized in that the water jet injection nozzle can be removed after the pile is pressed into the ground. The pile press-fitting device according to claim 4 is characterized in that an injection pipe and an injection port for injecting a backfill agent used for preventing soil loosening into the ground are provided in the pile.

A pile press-in device according to a fifth aspect of the present invention has a digging member for forming a press-fitting hole for press-fitting the pile into the ground along a pile press-in direction before press-fitting the pile into the ground, The excavation member is provided with a water jet injection nozzle at its tip in the excavation direction, for breaking up obstacles for press-fitting piles such as boulders and boulders mixed in the ground with high-pressure water. .

[0009] The pile press-in device according to claim 6 is characterized in that a cutter bit for crushing the obstacle is further juxtaposed at a tip of the excavation member in the excavation direction. The pile press-fitting device according to claim 7 is characterized in that the obstacle is crushed while rotating the cutter bit.

[0010] The pile press-in device according to claim 8 is characterized in that the pile press-in hole is formed while crushed obstacles are removed rearward in the digging direction. The pile press-in device according to claim 9 is characterized in that the high pressure water of the water jet is in a range from 1500 kg / sq. To 5000 kg / s.

According to a tenth aspect of the present invention, a water jet injection nozzle is provided at a tip of a pile in a press-fitting direction.
The method is characterized in that the pile is pressed into the ground while breaking obstacles such as boulders and boulders mixed in the ground with the high pressure water by water jet injection.

[0012] The pile press-in method according to claim 11 is characterized in that a backfill agent is injected into the ground while the pile is pressed into the ground to prevent loosening of the soil. Claim 12
The pile press-fitting method described in (1) is characterized in that an abrasive for improving a cutting force is mixed into the water jet according to the condition of the soil of the ground.

According to a thirteenth aspect of the present invention, there is provided the pile press-in method, wherein an additive for increasing the specific gravity of the water jet and increasing the impact force applied to the obstacle is added to the water jet in accordance with the soil condition of the ground. It is characterized by being mixed.

The pile press-in method according to claim 14 is characterized in that the pressure of the high-pressure water of the water jet is in a range from 1500 kg / sq. Cm to 5000 kg / sq.

According to a fifteenth aspect of the present invention, there is provided a pile press-fitting method, wherein a water jet injection nozzle is provided at a tip portion in a digging direction of a digging member for forming a pit press-fitting hole for press-fitting a pile into a ground along a pile pressing direction. It is characterized in that the press-fitting holes such as boulders and boulders mixed in the ground are broken by high pressure water by water jet injection to form the press-fitting holes, and the piles are press-fitted along the press-fitting holes. .

The pile press-fitting method according to claim 16 is characterized in that the press-fitting hole is formed while simultaneously crushing the obstacle by the water jet injection and mechanically crushing the obstacle.

The pile press-fitting method according to claim 17 is characterized in that an abrasive for improving a cutting force is mixed into the water jet in accordance with the soil condition of the ground. The pile press-fitting method according to claim 18, wherein an additive for increasing the specific gravity of the water jet and increasing the impact force applied to the obstacle is added to the water jet according to the soil condition of the ground. It is characterized by.

According to a nineteenth aspect of the present invention, in a ground condition where the obstacle is mixed, the pressure of the water jet injected from the water jet injection nozzle is switched to a high pressure side when the ground is mixed with the obstacle, and the obstacle is not mixed. In the case of the ground condition, the pressure of the water jet injected from the water jet injection nozzle is switched to a low pressure side to form the press-fit hole.

According to a twentieth aspect of the present invention, there is provided a method for press-fitting a pile, wherein an abrasive for improving a cutting force is mixed into the water jet according to a condition of the soil of the ground. The pile press-fitting method according to claim 21, wherein an additive for increasing a specific gravity of the water jet and increasing an impact force applied to the obstacle is added to the water jet according to a soil condition of the ground. It is characterized by.

In a preferred embodiment of the present invention, the pressure of the high-pressure water of the water jet is in a range from 1500 kg / cm 2 to 5000 kg / cm 2.

According to a twenty-third aspect of the present invention, there is provided a pile press-fitting method according to the tenth and fifteenth aspects, wherein a minute vibration is applied to the pile. ADVANTAGE OF THE INVENTION According to the pile press-in apparatus and the pile press-in method which concerns on this invention, at the time of press-in of a pile to the ground mixed with obstacles, such as a boulder, a boulder, etc., an obstacle is fractured | ruptured with high-pressure water, crushing facilitates the press-in, The work efficiency of press fitting can be remarkably improved.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment of the Invention] FIG. 1 is an explanatory diagram of a pile press-in operation using a pile press-in device according to the present invention, wherein 1 is a water supply filter unit, 2 is a water jet engine unit, Reference numeral 3 denotes a driving engine unit for a pile press-in device, 4 denotes a crane truck, 5 denotes a pile press-in device, and 6 denotes a pile.

Here, the pile press-in device 5 forms a press-in hole 8 for press-fitting the pile 6 while self-propelled along the top end 7 of the construction line, and press-fits the pile 6 into the ground 9. I do. The pile 6 has a wide steel sheet pile shown in FIG.
Any of the H steel sheet pile shown in FIG. 2 (b), the steel pipe sheet pile shown in FIG. 2 (c), and the PC wall shown in FIG. 2 (d) may be used. I do.

The pile press-in device 5 is provided with a digging member 10 for forming a press-fit hole 8 for press-fitting the pile 6 into the ground 9 along the pile press-in direction before press-fitting the pile 6 into the ground 9. I have. This excavation member 10 has an excavation pipe 11 as shown in FIG. In the excavation direction tip portion 12 of the excavation pipe 11,
A cutter bit 14 is provided for removing obstacles 13 (examples of cobblestones) such as boulders and boulders that are mixed in the ground 9 and hinder the press-fitting of the piles. A pair of water jet injection nozzles 15, 15 for breaking with water are provided. The drill pipe 11 is provided with supply passages 16 for supplying high-pressure water to the water jet injection nozzles 15. The excavation pipe 11 is advanced in the excavation direction while being rotated.

In this case, when obstacles 13 such as boulders and boulders are mixed in the ground 9 and the tip of the excavating member 10 abuts during the formation of the press-fit hole 8, the obstacle 13 is caught by the cutter bit 14. In order not to hinder the progress of the excavation pipe 11, the water is jetted and broken by high-pressure water jetted.

The pressure of the high pressure water of the water jet is:
Although it depends on the soil condition of the ground 9, it is desirable to be in the range of 1500 kg / square to 5000 kg / sq.

Depending on the soil condition of the ground 9, an abrasive for improving the cutting force may be mixed into the water jet, or an additive may be mixed into the water jet to increase the specific gravity of the water jet. It is preferable to increase the impact force applied to the object 13.

Further, when the ground condition is such that the obstacle 13 is not mixed, it is desirable to form the press-fit hole 8 by switching the pressure of the water jet jetted from the jet jet nozzles 15 to a lower pressure side.

According to this, the water jet injection nozzle 15 is provided at the tip 12 in the digging direction of the digging member 10 for forming the press-fitting hole 8 for press-fitting the stake in the ground 9 along the pile pressing direction. After crushing and crushing obstacles 13 such as cobblestones and boulders mixed in the ground 9 which are obstacles to the press-fitting of the water with high-pressure water jet, the press-fitting holes 8 are formed. 6 is press-fitted, and even the pile press-in work which has been extremely difficult so far can be efficiently performed.

[Second Embodiment of the Invention] As shown in FIG. 4, the drilling member 10 may be provided with a tricon-type cutter bit member 17 at the tip 12 in the drilling direction of the drilling pipe 11. The cutter bit members 17 are provided at intervals of 120 degrees in the circumferential direction of the excavation pipe 11, and the cutter bit members 17 are provided with cutter bits 18. The cutter bit member 17 is used to mechanically crush the obstacle 13 in a conventional manner. The water jet injection nozzle 15 is provided at the tip portion 12 of the excavation tube 11 in the excavation direction and between the cutter bit member 17 and the cutter bit member 17, and at the tip portion 12 of the excavation tube 11 in the excavation direction. And it is provided in the rotation center portion.

According to the excavation member 10, the obstacle 13 is mechanically crushed while being caught between the cutter bit members 17 by the rotation of the cutter bit 18 based on the rotation of the excavation pipe 11, and the water jet injection The obstacle 13 is broken by the high-pressure water, and the press-in hole 8 can be formed while simultaneously crushing the obstacle 13 by water jet injection and mechanically crushing the obstacle 13. Can be performed more efficiently.

[Third Embodiment of the Invention] Here, as shown in FIG. 5, the excavating member 10 comprises a rotating body 19 and a casing cylinder 20. A cutter bit member 21 is provided at the tip portion 12 of the rotating body 19 in the digging direction.
A cutter bit 22 is provided at the tip of the cutter bit member 21. A supply passage 23 for supplying high-pressure water is formed in the rotating body 19 in its axial direction, and a water jet injection nozzle 24 for breaking large obstacles is formed in the center of the cutter bit member 21. A helical guide blade 25 ′ for removing the crushed material 25 of the obstacle 13 backward in the digging direction is formed in the outer peripheral portion of the rotating body 19 in the axial direction.

According to this, the crushed material 2 of the obstacle 13
Since the press-fitting holes 8 can be formed while continuously removing 5, it is possible to further improve the efficiency of the pile-fitting work without depending on the ground conditions.

[Embodiment 4 of the Invention] Here, as shown in FIG. 6, a press-fitting of a cobblestone, a boulder or the like mixed with the ground 9 into a tip portion 26A in a press-fitting direction of a wide steel sheet pile 26 as a pile 6 is performed. There is provided a water jet injection nozzle 27 for breaking the obstacle 13 which becomes an obstacle. The wide-width steel sheet pile 26 is composed of a central plate portion 29 and a pair of connecting plate portions 30 bent at both sides of the central plate portion 29,
The mounting member 3 is attached to the central plate portion 29 and the pair of connecting plate portions 30.
1 is provided. Each of the mounting members 31 is provided with a supply passage 32 for supplying high-pressure water, and a water jet injection nozzle 27 is provided with an appropriate fixing tool such as an iron band (not shown) at the front end portion of the mounting member 31 in the press-fitting direction. And is fixed to the wide type steel sheet pile 26. After press-fitting the wide steel sheet pile 26, the water jet injection nozzle 2
7. The mounting member 31 is pulled up and removed from the steel sheet pile.

According to this, the wide-type steel sheet pile 26 is efficiently cut while the obstacles 13 such as boulders and boulders mixed in the ground 9 which are obstacles to the press-fitting of the pile are broken by the high-pressure water from the water jet injection nozzle 27. It can be pressed into the ground 9.

[Modification] Here, as shown in FIG.
The central plate portion 29 is provided with an injection pipe 33 and an injection port 34 for injecting a backfill agent used for preventing soil loosening into the ground 9. The injection port 34 is located above the water jet injection nozzle 27 so that the injection port 34 is not clogged with the scattering of mud and sand based on the water jet injection.

The wide steel sheet pile 26 is pressed into the ground 9 while pouring a backfill agent into the ground 9. The wide steel sheet pile 26 may be a double sheet type as shown in FIG.
There are two types of backfilling agents: cement type and inorganic flash solution.Cement type is based on cement and uses at least one of benite and sodium silicate according to the slowing of the effect time. Alternatively, the main material itself may be used like cement milk.

The inorganic flash solution mainly comprises sodium silicate,
You may use the medicine which can obtain a slow effect time and a lubricating material effect, for example, commercially available Alon. This inorganic flash solution is used to stabilize the ground by filling the voids of the ground that has been disturbed. As described above, the backfill material is properly used depending on the situation of the press-fitting work site.

When this backfilling agent is used, a wide-width steel sheet pile,
The double-type special wide-width steel sheet pile can be prevented from loosening the ground and ground when press-fitting, and the undesired settlement of neighboring residential buildings can be prevented.

Also, due to the effect of the lubricant, wide type steel sheet pile,
The friction between the double type special wide sheet steel sheet pile and the ground or ground can be reduced, and the press-in and pull-out resistance of the sheet pile can be reduced.

Further, when the pile is press-fitted, the water jet injection nozzle is fixed to the sheet pile or the fixing portion of the water jet spray nozzle in order to promote the press-fitting of the pile itself and reduce the impact of the pile driving to suppress the generation of noise. An electric, electromagnetic, or mechanical type micro vibration generating member such as a cam or a crank is attached near the section, and the micro vibration in the direction of press-fitting, intersecting with the direction of press-fitting, etc. Is effective.

The wide-width steel sheet pile 26 and the double special wide-width steel sheet pile 26 affect neighboring structures when the sheet pile is pulled out, when the sheet pile itself is used as a foundation pile, and when the bank protection wall is used. As described above, when the sheet pile itself is used as a structure, the sheet pile is left on the ground, and in the case of a temporary structure using the sheet pile as a strength member, the sheet pile is pulled out after the completion of the construction.

[0043]

According to the pile press-in device and the pile press-in method according to the present invention, the press-in of the pile can be easily performed on the ground mixed with the cobblestone, the boulder, etc., without being completely influenced by the existence of the obstacle.
The work efficiency of pile press-in can be significantly improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a pile press-in operation using a pile press-in device according to the present invention.

FIG. 2 is an explanatory view of a shape of a pile according to the present invention,
(A) shows a wide steel sheet pile, (b) shows an H steel sheet pile, (c) shows a steel pipe sheet pile, and (d) shows a PC wall.

FIG. 3 is a schematic view of a main part of a digging member according to Embodiment 1 of the invention of a pile press-in device of the present invention, (a) is a cross-sectional view of a main part of the digging member, and (b) is a sectional view of the digging member. It is the top view which looked at from the tip of the excavation direction.

FIG. 4 is a schematic view of a main part of a digging member according to a second embodiment of the invention of a pile press-in device of the present invention. It is the top view which looked at from the tip of the excavation direction.

FIG. 5 is a cross-sectional view of a main part of a digging member according to a third embodiment of the invention of the pile press-in device of the present invention.

FIG. 6 is an explanatory view of a pile according to a fourth embodiment of the invention of the pile press-in device of the present invention, wherein (a) is a plan view of the pile,
(B) is a front view of the pile, and (c) is a side view of the pile.

FIG. 7 shows a modification of the pile according to the fourth embodiment of the invention of the pile press-in device of the present invention, wherein (a) is a horizontal sectional view of the pile,
(B) is a front view of the pile, (c) is X1-X1 of (b).
It is sectional drawing which follows a line.

FIG. 8 shows another modification of the pile according to the fourth embodiment of the pile press-fitting device of the present invention, wherein (a) is a horizontal sectional view of the pile, (b) is a front view of the pile, c) is X2- of (b).
It is sectional drawing which follows the X2 line.

[Explanation of symbols]

 6,26 Pile 9 Ground 13 Obstacle 15,27 Water jet injection nozzle

Claims (23)

[Claims] 1. A pile press-fitting device, wherein a water jet injection nozzle is provided at a tip end of a pile in a press-fitting direction, and high-pressure water is used to crush obstacles such as cobblestones and boulders mixed in the ground. A pile press-fitting device. 2. The pile press-in device according to claim 1, wherein the pressure of the high-pressure water injected by the water jet injection nozzle is in a range from 1500 kg / square cm to 5000 kg / sq. . 3. The pile press-fitting device according to claim 1, wherein the water jet injection nozzle can be removed after the pile is pressed into the ground. 4. The pile press-in according to claim 1, wherein an injection pipe and an injection port for injecting a backfill agent used for preventing soil loosening into the ground are provided in the pile. apparatus. 5. A pile press-in device, comprising: a digging member for forming a press-fit hole for press-fitting the stake in the ground along a stake-insertion direction before press-fitting the stake into the ground. Is provided with a water jet injection nozzle at its tip in the direction of excavation for breaking obstacles for pile injection such as boulders and boulders mixed in the ground with high-pressure water. . 6. The pile press-fitting device according to claim 5, wherein a cutter bit for crushing the obstacle is further juxtaposed at a tip portion of the excavation member in the excavation direction. 7. The pile press-in device according to claim 5, wherein the obstacle is crushed while rotating the cutter bit. 8. The pile press-fitting device according to claim 5, wherein the press-fitting hole is formed while removing the crushed material of the obstacle backward in the excavation direction. 9. The high pressure water of the water jet is 150
The pile press-in device according to claim 5, characterized in that it is in a range from 0 kilogram weight / square centimeter to 5000 kilogram weight / square centimeter. 10. A pile press-fitting method, in which a water jet injection nozzle is provided at the tip of a pile in the press-fit direction, and obstacles such as boulders and boulders mixed in the ground, which are impeded by the press-fitting of piles, are broken by high pressure water by water jet jet. A method for press-fitting the pile into the ground while performing the method. 11. The method according to claim 10, wherein a backfilling agent is injected into the ground while the pile is being pressed into the ground to prevent soil from loosening. 12. The pile press-fitting method according to claim 10, wherein an abrasive for improving a cutting force is mixed into the water jet according to a soil condition of the ground. 13. The water jet according to claim 1, wherein an additive is added to the water jet to increase the specific gravity of the water jet and increase the impact force applied to the obstacle. The pile press-fitting method according to claim 10 or 11. 14. The method according to claim 10, wherein the pressure of the high-pressure water of the water jet is in a range from 1500 kg / square centimeter to 5000 kg / sq. 15. A pile press-fitting method, wherein a water jet injection nozzle is provided at a tip portion in a digging direction of a digging member for forming a press-fitting hole for press-fitting a pile into a ground along a pile press-fitting direction. Pile press-fitting method, comprising forming the press-fitting hole while breaking obstacles for press-fitting such as boulders and boulders with high-pressure water by the water jet injection, and press-fitting the pile along the press-fitting hole. . 16. The method according to claim 15, wherein the press-fitting hole is formed while simultaneously crushing the obstacle by the water jet injection and mechanically crushing the obstacle. 17. The pile press-fitting method according to claim 15, wherein an abrasive for improving a cutting force is mixed into the water jet according to a soil condition of the ground. 18. An additive for increasing a specific gravity of the water jet and increasing an impact force applied to the obstacle according to a soil condition of the ground. The pile press-in method according to 15 or 16. 19. The pressure of the water jet injected from the water jet injection nozzle is switched to the high pressure side when the ground conditions include the obstacle, and the water jet injection nozzle is switched from the water jet nozzle when the ground condition does not include the obstacle. The pile press-fitting method according to claim 15, wherein the pressure hole is formed by switching the pressure of the jetted water jet to a low pressure side. 20. The pile press-fitting method according to claim 19, wherein an abrasive for improving a cutting force is mixed into the water jet according to a soil condition of the ground. 21. An additive for increasing the specific gravity of the water jet and increasing the impact force applied to the obstacle according to the soil condition of the ground. 20. The pile press-in method according to item 19. 22. The pile press-in according to claim 19, wherein the pressure of the high-pressure water of the water jet is in the range of 1500 kg / square to 5000 kg / sq. Method. 23. A pile press-fitting method, wherein a water jet spray nozzle is provided at the tip of the pile in the press-fit direction, and obstacles for pile press-fit such as cobble stones and boulders mixed in the ground are broken by high pressure water by water jet spray. A method of press-fitting the pile into the ground while applying fine vibration to the pile.