JP3090498U - Pile press-in device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a pile press-in device and a pile press-in method capable of facilitating the press-fitting of a pile into the ground mixed with obstacles such as cobblestones and boulders and improving the pile press-in work efficiency. SOLUTION: The pile press-in device of the present invention comprises a water jet injection nozzle 15 for breaking and crushing a pile press-in obstacle 13 such as a boulder, a boulder, and the like mixed in the ground 9, and a tip portion of the pile 6 itself in the press-in direction. It is provided in.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

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

[0002]

[Prior art]

 Conventionally, an electric or hydraulic type vibro hammer, a press machine combined with an earth auger, a hydraulic press-in / draw-out 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, a work of driving a pile such as a wide-width steel sheet pile, an H steel sheet pile, a steel pipe sheet pile, and a PC wall into the ground has been performed.

[0003]

[Problems to be solved by the invention]

 However, obstacles such as cobblestones, boulders, and gravel may be mixed in the ground, and when trying to press a pile into a hard ground mixed with these cobblestones, boulders, etc. using a conventional pile press-in device, Piles that have been press-fitted due to the resistance of large boulders or boulders, etc., are displaced diagonally with respect to the vertical direction, or are displaced with respect to the construction planning line. However, there is a problem that the work of press-fitting piles into the ground cannot be easily performed, and the efficiency of press-fitting piles decreases. Regarding this, the idea of providing a high-pressure water injection nozzle on the pile has been announced, but experiments have confirmed that the pile itself may be deformed by the pressure in the crushing space or the injection nozzle may be damaged. Without ever becoming such an idea, this idea has come to an end.

[0004] The present invention has been made in view of the above circumstances, and has been made after finding that the main cause of the problem is whether or not to sequentially discharge crushed materials from the crushing space in a high pressure state. The purpose of this is to facilitate the injection of the stakes by crushing and crushing the obstacles with high-pressure water when pressing the pile into the ground with obstacles such as boulders and boulders, It is an object of the present invention to provide a pile press-in device capable of performing a pile press-in operation in a state that has been difficult so far with high efficiency.

[0005]

[Means for Solving the Problems]

 The pile press-in device according to claim 1, wherein before the pile is pressed into the ground, a digging member including a rotating body and a casing tube that form a press-fit hole for pressing the pile into the ground along the pile press-in direction. The excavation member is provided with a water jet injection nozzle for breaking obstacles for press-fitting of piles such as boulders and boulders mixed in the ground with high-pressure water, and a water jet injection nozzle is provided from the water jet injection nozzle. The high pressure water is used to crush the obstacle, and at the same time, the obstacle crushed by the water jet is removed rearward in the digging direction by the spiral guide blades of the rotating body to form the pile press-in hole, and along the press-in hole. And press-fitting the pile.

The pile press-in device according to claim 2 is characterized in that the high-pressure water of the water jet is in a range from 1500 kilograms / square centimeter to 5000 kilograms / 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-in device according to claim 4, wherein an injection pipe and an injection port for injecting a backfill agent used for preventing loosening of soil into the ground are provided in the pile.

The pile press-fitting device according to a fifth aspect is characterized in that an abrasive for improving a cutting force is mixed into the water jet according to a condition of the soil of the ground.

[0009] The pile press-in device according to claim 6, 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 being mixed.

[0010] The pile press-in device according to claim 7 switches the pressure of the water jet injected from the water jet injection nozzle to a high pressure side in a ground condition where the obstacle is mixed, so that the obstacle is mixed. When there is no ground condition, the pressure of the water jet injected from the water jet injection nozzle is switched to the low pressure side to form the press-fit hole.

[0011] According to the pile press-in device according to the present invention, when the pile is pressed into the ground containing obstacles such as cobblestones and boulders, the obstacles are broken and crushed with high-pressure water, thereby facilitating the press-fitting of the obstacles. However, even in difficult situations due to the presence of obstacles, the work efficiency of pile injection can be significantly improved.

[0012]

[Embodiment of the invention]

 [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, 1 is a water supply filter unit, 2 is a water jet engine unit, and 3 is a pile press-in device drive engine. The unit, 4 is a crane truck, 5 is a pile press-in device, and 6 is a pile.

Here, the pile press-in device 5 forms a press-in hole 8 for press-fitting the pile 6 while self-propelling along the top end 7 of the construction line, and also places the pile 6 in the ground 9. Press in. As the pile 6, any of the wide-width steel sheet pile shown in FIG. 2A, the H steel sheet pile shown in FIG. 2B, the steel pipe sheet pile shown in FIG. 2C, and the PC wall shown in FIG. However, here, an example in which a wide-width steel sheet pile is used will be exemplified.

The pile press-fitting device 5 is provided with a digging member 10 for forming a press-fit hole 8 for press-fitting the pile 6 along the pile press-fit direction into the ground 9 before press-fitting the pile 6 into the ground 9. ing. As shown in FIG. 3, when obstacles 13 such as boulders and boulders are mixed in the ground 9, if the tip of the excavation member 10 abuts during the formation of the press-fit hole 8, the obstacle 13 is caught by the cutter bit. Cobble stones are broken and crushed by water jet sprayed high pressure water so as not to hinder the progress of excavation.

The pressure of the high-pressure water of the water jet depends on the soil conditions of the ground 9, but is preferably in the range of 1500 kg / square cm to 5000 kg / sq.

Depending on the soil condition of the ground 9, an abrasive for improving the cutting force is mixed in the water jet, or an additive is mixed in the water jet to increase the specific gravity of the water jet. It is preferable to increase the impact force applied to the obstacle 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 injected from the jet injection nozzles 15 and 15 to the low pressure side.

According to this, the water jet injection nozzle 24 is provided at the tip of the excavation member 10 forming the press-fitting hole 8 for press-fitting the pile into the ground 9 along the pile press-fitting direction. Obstacles 13 such as boulders, boulders, etc., which are mixed in 9 and which are obstacles to the press-fitting of the pile, are formed by crushing and crushing the high pressure water of the water jet injection to form the press-fitting holes 8, and then the piles along the press-fitting holes 8 are formed. 6 is press-fitted, and even the most difficult pile press-in work can be done efficiently.

Here, as shown in FIG. 3, the excavation member 10 includes a rotating body 19 and a casing cylinder 20. A cutter bit member 21 is provided at a tip portion 12 of the rotating body 19 in the excavation direction, and a cutter bit 22 is provided at a 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 press-fit hole 8 can be formed while the crushed material 25 of the obstacle 13 is continuously removed by the spiral guide blade 25 ′ of the rotating body 19. It is possible to smoothly and efficiently perform the pile press-in operation without being performed.

[Second Embodiment of the Invention] Here, as shown in FIG. 4, a press-fitting of a cobble stone, a boulder, or the like mixed with the ground 9 into a tip portion 26A in a press-fitting direction of a wide-width steel sheet pile 26 as a pile 6. A water jet injection nozzle 27 is provided for breaking the obstacle 13 which is an obstacle to the water jet. 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, and is attached to the central plate portion 29 and the pair of connecting plate portions 30. A member 31 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 at an end portion of the mounting member 31 in the press-fitting direction with an appropriate fixing member such as an iron band (not shown). It is fixed to the wide-width steel sheet pile 26 using. After press-fitting the wide steel sheet pile 26, the water jet injection nozzle 27 and the mounting member 31 are lifted and removed from the steel sheet pile. Also in this case, the crushed material is discharged backward in the excavation direction as shown in FIG.

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

[Modification] Here, as shown in FIG. 5, an injection pipe 33 and an injection port 34 for injecting a backfill agent used for preventing loosening of soil into the ground 9 are provided in the central plate portion 29. I have. 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-type 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 of a double plate type as shown in FIG. There are two types of backfill agents: cement-based and inorganic flash solution.Cement-based is based on cement and mixes at least one of benite and sodium silicate according to the slowing of the effective time. May be used, or the main material itself such as cement milk may be used.

The inorganic flash solution may be sodium silicate as a main component, and may be a chemical agent capable of achieving a slow effect time and a lubricating effect, for example, a commercially available Alon. This inorganic flash solution is used to stabilize the ground by filling the voids in the turbulent ground. The backfill material can be used depending on the situation of the press-fitting work site.

By using this backfilling agent, it is possible to suppress the loosening of the ground and the ground when press-fitting wide-width steel sheet piles and double-type special wide-width steel sheet piles. The bottom can be prevented.

Further, by the effect of the lubricant, the friction between the wide-width steel sheet pile and the double-type special wide-width 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.

Furthermore, when the pile is press-fitted, 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, a fixing portion of the water jet injection nozzle to the sheet pile or this portion is used. An electric, electromagnetic, or mechanical micro-vibration generating member such as a cam or a crank is attached near the fixed part. It is effective to apply micro vibration.

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, use the sheet pile itself as a foundation pile, 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.

[0030]

[Effect of the invention]

 According to the pile press-in device according to the present invention, it is possible to facilitate the press-in of the pile without depending on the existence of obstacles at all in the ground mixed with cobble stones, boulders, etc., and to significantly improve the work efficiency of the pile press-in. it can.

[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 cross-sectional view of a main part of the excavation member according to the first embodiment of the invention of the pile press-fitting device of the present invention.

FIG. 4 is an explanatory view of a pile according to the first embodiment of the invention of the pile press-fitting 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. 5 shows a modified example of the pile according to the first embodiment of the present invention of the pile press-in device of the present invention, (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. 6 shows another modification of the pile according to the first embodiment of the invention of the pile press-in device of the present invention, (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 10 Drilling member 13 Obstacle 19 Rotating body 25 'Spiral guide blade 24,27 Water jet injection nozzle 25 Crushed material

Claims (7)

[Utility model registration claims] An excavating member comprising a rotating body and a casing tube, which is a pile press-in device and forms a press-fit hole for press-fitting the pile into the ground along a pile press-in direction before press-fitting the pile into the ground. A water jet injection nozzle is provided on the excavating member for breaking up obstacles for press-fitting piles such as boulders and boulders mixed in the ground with high-pressure water,
While crushing the obstacle by high-pressure water from the water jet injection nozzle, forming the press-fitting hole while removing the obstacle broken by the water jet backward in the digging direction by the spiral guide blades of the rotating body. A pile press-in device for press-fitting the pile along the press-fit hole. 2. The high pressure water of the water jet is 150
The pile press-fitting device according to claim 1, wherein the weight is in a range from 0 kilogram weight / square centimeter to 5000 kilogram weight / square centimeter. 3. The pile press-fitting device according to claim 1, wherein the water jet injection nozzle is removable after the pile is pressed into the ground. 4. The pile 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. Pile press equipment. 5. The pile press-fitting device according to claim 1, wherein an abrasive for improving a cutting force is mixed into the water jet according to a soil condition of the ground. . 6. 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. The pile press-in device according to any one of 1 to 5. 7. In a ground condition in which the obstacle is mixed, the pressure of the water jet injected from the water jet injection nozzle is switched to a high pressure side, and in a ground condition in which the obstacle is not mixed, the pressure of the water jet is changed from the water jet injection nozzle. The pile press-fitting device according to claim 1, wherein the press-fitting hole is formed by switching the pressure of the jetted water jet to a low pressure side.