JP3165997B2 - Casting method and equipment for sheet piles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for driving steel sheet pile in construction work.

[0002]

2. Description of the Related Art Cut-off work in sand and gravel, boulders, rubble, concrete, construction of steel pipe sheet piles in earth retaining wall construction, steel pipe sheet pile soil retaining walls in steep ground and underwater hard ground, rock, etc. Pile hammers, hydraulic (pneumatic) hammers,
Steel pipe sheet piles may be hit directly on the ground with various hammers such as a vibro hammer.

When directly hit with such a hammer,
If there is a gravel ground or a boulder, etc.
There is a possibility that damage will be caused and casting will not be possible.

[0004] Therefore, as a current construction method, drilling is performed by using a full-rotation type casing press-fitting machine and a hammer club bucket, a double vertical chisel, a down-the-hole hammer, etc., and is replaced with good-quality earth and sand. After continuous construction, steel sheet piles are cast in the improved places. In this case, the excavation diameter for replacing with good-quality earth and sand is naturally considerably larger than the diameter of the steel pipe sheet pile.

[0005]

In such a conventional replacement method, in a construction on a steeply sloping ground or a lake bed, a riverbed, or a seabed with a large depth of water, etc., a fully swiveling casing press-fitting for performing the replacement improvement work is required. It requires very large-scale temporary facilities such as a machine installation stand, and it is difficult to ensure the accuracy of wrapping work for replacement by installing a casing.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to make the excavation and drilling area closer to the outer diameter of the steel pipe sheet pile as compared with the case of the conventional replacement method. It is an object of the present invention to provide a steel pipe sheet pile driving method and apparatus that can accurately perform the steel pipe sheet pile driving in one step at the same time as excavation and drilling without using a large-scale temporary facility.

[0007]

According to the present invention, in order to achieve the above-mentioned object, the down-the-hole hammer used in the method of placing steel pipe sheet piles is such that the bit portion can be expanded in diameter.
A down-the-hole hammer and a rod attached to a pile driver are inserted into a steel pipe sheet pile, and the steel pipe sheet pile is opposed to a female joint and an L-shaped angle material which are spaced apart so as to close the L-shaped angle materials to each other. Male joints that are opened in opposite directions to each other are provided so as to extend in the longitudinal direction on the left and right sides, respectively, and these female joints and male joints are equipped with carbide bits at the tips and excavated with a down-the-hole hammer By connecting the female and male joints projecting from the range to each other, the succeeding steel pipe sheet pile is used as a guide to drive the succeeding steel pipe sheet pile, and the bit of the down-the-hole hammer coming out from the end of the steel pipe sheet pile is expanded to expand the diameter. After that, start drilling with a down-the-hole hammer.After drilling is completed, reduce the bit diameter and pull up the rod and down-the-hole hammer inside the steel pipe sheet pile. Hand are those that opposed at intervals so as to close the angle member of an L-shaped cross section with each other,
The gist of the male joint is that angle members having an L-shaped cross section are combined so as to be opened in opposite directions.

In a steel sheet pile driving device, a bit portion is provided with a gap at a central portion where three horizontal blade-like members having a large number of excavating bits overlap each other so as to form an aperture of a camera. A down-the-hole hammer provided with a locking portion having a diameter larger than the diameter of the bit portion when the bit portion is reduced, and a steel sheet pile inserted by the down-the-hole hammer. A female joint which is provided with a distal end ring on the inner side of the distal end so as to make the inner diameter of the steel pipe sheet pile smaller than the locking portion of the down-the-hole hammer and faces each other at intervals so as to close the angle members having an L-shaped cross section to each other. Male joints in which angle members having an L-shaped cross section are opened in opposite directions to each other are provided so as to extend in the longitudinal direction on the left and right sides, respectively. The female joint is composed of angled members having an L-shaped cross section, and the male joint is formed by connecting the angle materials having an L-shaped cross section to each other. The gist of the invention is that it is adapted to be opened in the opposite direction.

According to the present invention, a bit slightly larger than the outer diameter of a steel sheet pile is drilled with a down-the-hole hammer having an enlarged bit portion, thereby reducing the tip resistance and peripheral friction of the steel sheet pile to reduce drilling. A steel pipe sheet pile can be driven.

[0010] Further, by connecting the joints to each other, the succeeding steel pipe sheet pile can be driven with high precision using the preceding steel pipe sheet pile as a guide.
The cemented carbide bit at the end of the joint can be used to break ground, rocks, etc., and to cut and remove root mortar and the like in the joint of the precast steel pipe sheet pile.

Further, the tip ring provided on the steel pipe sheet pile prevents the down-the-hole hammer drilling position from shifting, prevents the joint of the preceding steel pipe sheet pile from being damaged by the hammer bit, and applies the vibration impact force of the hammer directly to the steel pipe sheet pile. The transmission and the drilling and driving can be performed simultaneously and reliably.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 7 are side views of respective steps showing one embodiment of the steel pipe sheet pile driving method of the present invention.

2 and 3, reference numeral 1 in FIG. 2 and FIG. 3 denotes a down-the-hole hammer, which is an air-driven hitting machine, which is mounted on a crawler type pile driving machine 2. It is suspended from the device (auger machine) 3.

As shown in FIG. 2, the down-the-hole hammer 1 is disposed at the tip of the drilling rod 4, and
As shown in the figure, the bit portion 1a has a reduced diameter depending on whether or not a gap is provided at a central portion where three horizontal blade-like bodies in which a large number of drill bits 5 are planted overlap each other so as to form an aperture of a camera. The diameter can be expanded from.

FIG. 11 shows a reduced state of the bit portion 1a.
Reference numeral 12 denotes a diameter-expanded state. When the rotational force of the driving device 3 is transmitted to the down-the-hole hammer 1 through the drilling rod 4, the diameter is increased by rotating to the right, and the diameter is reduced by rotating to the left. Become.

Further, as shown in FIGS. 8 and 9, the down-the-hole hammer 1 has a drill rod 4 above the bit portion 1a.
A locking portion 9 having a diameter larger than that of the bit portion 1a when the diameter of the bit portion 1a is reduced is provided.

Numeral 6 denotes a steel pipe sheet pile through which the down-the-hole hammer 1 and the drilling rod 4 can be inserted. As shown in FIGS. 13 to 15, angle members having an L-shaped cross section are opposed to each other with a gap therebetween. A male joint 7 in which a female joint 7a and an angle member having an L-shaped cross section are opened in opposite directions to each other.
and b are provided so as to extend in the longitudinal direction on the left and right sides, respectively.

Each of the female joint 7a and the male joint 7b has a carbide bit 8 at the tip. The part of the carbide bit 8 also constitutes a joint, and the female joint 7a and the male joint 7
b is a bit having a different shape.

In addition, a tip ring 10 is provided inside the tip of the steel sheet pile 6 so as to make the inner diameter of the steel sheet pile smaller than the outer diameter of the locking portion 9 of the down-the-hole hammer 1.

Next, a method of driving a steel pipe sheet pile according to the present invention using the above-described driving will be described. First, as shown in FIG. 1, the steel pipe sheet pile 6 is hung on the temporary receiving stand 11 using the crawler crane 12, and temporarily received by the head.

As shown in FIG. 2, the down-the-hole hammer 1 and the drilling rod 4 mounted on the pile driver 2 are inserted into the temporarily received steel pipe sheet pile 6 using the pile driver 2. At this time, the diameter of the bit portion 1a of the hammer is reduced as shown in FIG.

As shown in FIG. 3, the auxiliary winding wire of the pile driver 2
13, the steel pipe sheet pile 6 is lifted, and at the same time, the drive unit (auger machine) 3, the drilling rod 4, and the down-the-hole hammer 1 are wound up, and the bit part 1a protruding from the tip of the steel pipe sheet pile 6
Expand the diameter.

As shown in FIG. 4, after the diameter is expanded, the steel pipe sheet pile 6 is left behind, and the steel pipe sheet pile 6 is lifted on the auger side.

As shown in FIG. 5, the steel pipe sheet pile 6 is moved to a predetermined place, erection is performed, and the pile core at the setting place is taken out as shown in FIG. Start drilling while paying attention to the inclination of.

In this case, as shown in FIGS. 13 to 15, the steel pipe sheet pile 6 to be driven after the steel pipe sheet pile 6 which was previously driven was previously driven by engaging the female joint 7a and the male joint 7b. The steel pipe sheet pile 6 can be driven into the guide.

In FIG. 14, α indicates the excavation range of the down-the-hole hammer 1, and the female joint 7a and the male joint 7b
Protrudes from this range. The female joint 7a and the male joint 7b
Carbide bit 8 provided at the tip of the head is used to cut off the ground, rocks, etc. at a portion outside the excavation range of the down-the-hole hammer 1 and to fix mortar, etc. in the joint of the steel pipe sheet pile previously cast. Perform cutting and removal.

As shown in FIG. 7, after drilling is completed, the down-the-hole hammer 1 and the drilling rod 4 are reversed, the diameter of the bit portion 1a is reduced, and the drilling rod 4 and the down-the-hole hammer 1 are removed from the inside of the steel pipe sheet pile 6. Pull up.

Although not shown in the drawings, after the lifting, the mortar is squeezed into the steel pipe sheet pile from the ground and driven into the pile. The joints of the female joint 7a and the male joint 7b are washed and cleaned, and then a polypipe is used. Insert the waterproofing agent injection bag, insert a perforated PVC pipe into this injection bag, pour the mixed urethane liquid from the PVC pipe mouth, and fill up to the mouth,
Stop water.

[0029]

As described above, according to the present invention, the excavation and drilling range can be made closer to the outer diameter of the steel sheet pile, compared with the conventional replacement method. Moreover, the excavation and drilling can be performed simultaneously with excavation and drilling in a single step without using a large-scale temporary facility, without using a large-scale temporary facility.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a first step showing one embodiment of a steel pipe sheet pile driving method according to the present invention.

FIG. 2 is a vertical sectional side view of a second step showing one embodiment of the steel pipe sheet pile driving method of the present invention.

FIG. 3 is a vertical sectional side view of a third step showing one embodiment of the steel pipe sheet pile driving method of the present invention.

FIG. 4 is a vertical sectional side view of a fourth step showing one embodiment of the steel pipe sheet pile driving method of the present invention.

FIG. 5 is a vertical sectional side view of a fifth step showing one embodiment of the steel pipe sheet pile driving method of the present invention.

FIG. 6 is a vertical sectional side view of a sixth step showing one embodiment of the steel pipe sheet pile driving method of the present invention.

FIG. 7 is a vertical sectional side view of a seventh step showing one embodiment of the steel pipe sheet pile driving method of the present invention.

8 is an enlarged side view of a portion A in FIG. 3 when the diameter is reduced.

9 is an enlarged view of a portion A in FIG. 3 and is a longitudinal sectional side view when the diameter is enlarged.

FIG. 10 is a partially cutaway side view of a down-the-hole hammer to be used.

FIG. 11 is a bottom view of the down-the-hole hammer used when the diameter is reduced.

FIG. 12 is a bottom view of the down-the-hole hammer used when the diameter is expanded.

FIG. 13 is a plan view showing a driving state of a steel pipe sheet pile.

FIG. 14 is a plan view showing details of a joint of a steel pipe sheet pile.

FIG. 15 is a side view showing a driving state of a steel pipe sheet pile.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Down the hole hammer 1a ... Bit part 2 ... Pile driver 3 ... Driver 4 ... Drilling rod 5 ... Drilling bit 6 ... Steel pipe sheet pile 7a ... Female joint 7b ... Male joint 8 ... Carbide bit 9 ... Locking part 10 ... Tip ring 11 ... Temporary support stand 12 ... Crawler crane 13 ... Supplementary wire 14 ... Conduction material

──────────────────────────────────────────────────続 き Continuing on the front page (72) Kenji Kuroiwa 1-3-15 Awaza, Nishi-ku, Osaka-shi, Osaka Kashima Construction Co., Ltd. Kansai Branch (72) Keiji Kawahara 1-3-3 Awaza, Nishi-ku, Osaka-shi, Osaka No.15 Kashima Construction Co., Ltd.Kansai Branch (72) Inventor Chiaki Uruma 1-3-15 Awaza, Nishi-ku, Osaka-shi, Osaka Prefecture Kashima Construction Co., Ltd.Kansai Branch (72) Inventor, Sadayuki Nakamuro 1-3-15 Kashima Construction Co., Ltd.Kansai Branch (72) Inventor Takeshi Hirokawa 3-2-2 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc. (72) Inventor Kosuke Yokoyama Sayo-gun, Hyogo Prefecture 501 Yamayo, Sayocho Inside Yokoyama Foundation (72) Inventor Takeshi Hayashi Kobe-cho, Anpachi-gun, Gifu Prefecture (56) References JP-A-5-311654 (JP, A) JP-A-7-252829 (JP, A) JP-A-55-136328 (JP, A) JP-A-9-49388 ( JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02D 7/00

Claims (4)

(57) [Claims] The down-the-hole hammer used has a bit portion capable of expanding in diameter, and a down-the-hole hammer and a rod attached to a pile driver are inserted into a steel pipe sheet pile. The female joint and male joint are provided with carbide bits at the tips, and they are protruded from the excavation area with a down-the-hole hammer. Driving a steel pipe sheet pile with the sheet pile as a guide, expanding the bit of the down-the-hole hammer coming out from the tip of the steel sheet pile, starting drilling with the down-the-hole hammer after the diameter expansion, and after completing the drilling, A method of placing steel pipe sheet piles, characterized in that a bit portion is reduced in diameter and a rod and a down-the-hole hammer inside the steel pipe sheet piles are pulled up. 2. The female joint is formed by facing angle members having an L-shaped cross section at intervals so as to close each other.
2. The method according to claim 1, wherein the male joint is formed by opening angle members having an L-shaped cross section in a direction opposite to each other. 3. A bit portion is determined from whether or not a diameter is reduced by determining whether or not a gap is provided at a central portion where three horizontal blade-like members having a large number of excavated bits planted therein constitute a stop of a camera. A down-the-hole hammer provided with an engagement portion having a diameter larger than the diameter of the bit portion when the bit portion is reduced, and a down-the-hole hammer provided inside a tip end of a steel pipe sheet pile into which the down-the-hole hammer is inserted; A tip ring that makes the inside diameter of the steel pipe sheet pile smaller than the locking part of the female joint is provided, and a female joint and a male joint are provided so as to extend in the longitudinal direction on the left and right sides, respectively. A steel pipe sheet pile driving device comprising a steel pipe sheet pile having a carbide bit attached thereto. 4. The female joint is one in which angle members having an L-shaped cross section are opposed to each other at intervals so as to close each other.
4. The steel pipe sheet pile driving device according to claim 3, wherein the male joint is formed by opening angle members having an L-shaped cross section in opposite directions.