JP2580181Y2 - Steel sheet pile joint protection system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe sheet pile joint protection device for preventing solidified muddy water, mortar and the like from entering a joint of a built steel pipe sheet pile.

[0002]

2. Description of the Related Art In a method of constructing a steel pipe sheet pile in an excavated hole in a steel pipe sheet pile method, it is necessary to fill mortar between the excavation hole and the steel pipe sheet pile or to solidify muddy water around the excavation hole. It is essential. At this time, if the mortar or solidified mud enters the joint of the steel pipe sheet pile, the joint part of the steel pipe sheet pile to be next built cannot be inserted into the joint space surrounded by the arm of the joint, and the inside of the joint is washed. Is complicated.

For this reason, conventionally, in order to prevent solidified muddy water or the like from entering the joint portion of a steel pipe sheet pile built in, for example, as shown in FIG. 5, a joint section 4 of a steel pipe sheet pile 3 is formed in advance. A tubular body 10 having a cross-sectional shape that can be inserted into a joint space to be inserted is prepared, and the tubular body 10 is attached to the steel pipe sheet pile 3.
By inserting the shaft with the shaft up and down into the joint 4 of FIG.
As shown in the figure, a pair of arm tip portions 4a forming the joint portion 4
Steel plates 11, 12 from the inside and outside, respectively, at the entrance formed by
The steel plates 11 and 12 are connected to each other with bolts and the like, and the entrance of the joint portion 4 is closed to prevent solidified muddy water and the like from flowing into the joint 4.

[0004]

However, according to the above-mentioned conventional method, in which the cylindrical body 10 is inserted into the joint 4 to prevent the solidified muddy water from sneaking in, The outer peripheral surface of the cylindrical body 10 to be charged and the joint 4
The clearance between the inner peripheral surface and the inner peripheral surface needs to be within a predetermined gap. Therefore, it is difficult to insert the cylindrical body 10 into the joint 4 or to remove the cylindrical body 10 from the joint 4. .

[0005] In addition, a steel plate 11,
In the method of installing the joint 12, the arm 4a of the joint and the steel plate 1
Solidified mud may enter the joint from the gap between the steel plates 1 and 12, and if the solidified mud enters the joint 4, a space for washing in the joint 4 cannot be secured. May cause a hang-up. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a steel pipe sheet pile joint protection device which can be easily installed and removed, and can reliably secure a predetermined space in the joint. And

[0006]

In order to achieve the above object, a steel pipe sheet pile joint protection device according to the present invention encloses a predetermined space with a pair of arms protruding laterally from an outer peripheral surface of a steel pipe sheet pile. A device that protects a joint part in which the both ends of the arm face each other with a predetermined space left and right facing each other, and a tubular body that can be inserted between the two arm ends of the joint part with the axis up and down. Left and right protrusions project from the outer peripheral surface of the cylindrical body toward the respective arm tip portions of the joint portion.The respective protrusion portions extend along both side surfaces of the corresponding arm tip portions. It is characterized by having a pair of guard plates each capable of sandwiching the arm tip.

[0007]

The distal end of each arm forming the inlet of the joint is sandwiched between a pair of guard plates of each of the protrusions, and the inlet of the joint is closed to allow solidified mud or the like to flow. Prevents entry into the joint from the inlet. Also, even if solidified mud, etc., penetrates from the gap between the arm tip and the protrusion, and enters the joint and fills the joint space, the solidified solid remains inside the tubular body of the steel pipe sheet pile joint protection device. Since muddy water does not enter, a predetermined amount of space along the up-down direction is reliably secured in the joint.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the steel pipe sheet pile joint protection device of this embodiment includes a left and right protrusions 2 from an outer peripheral surface of a cylindrical body 1 made of a steel pipe.
However, it is comprised so that it may protrude mutually in the opposite direction. The cylindrical body 1 has an outer diameter that can be inserted with its axis up and down into a gap between a pair of arm end portions 4b forming the receiving joint portion 4 of the steel pipe sheet pile 3.

The left and right protrusions 2 each include a pair of guard plates 2a made of a steel plate projecting in parallel from the side surface of the cylindrical body 1, and the distance between the pair of guard plates 2a is determined by the joint portion. Is set to be wider than the thickness of the tip 4b of the arm 4a that forms Further, as shown in FIG. 2, a T-shaped T-shaped joint 5 projecting from the steel pipe sheet pile 3 is provided on the steel pipe sheet pile 3 using the steel pipe sheet pile joint protection device.
And a receiving joint 4 protruding from the outer periphery of the steel pipe sheet pile 3 on the opposite side of the T-shaped joint 5.
Is a pair of arms 4a projecting laterally from the outer periphery of the steel sheet pile 3
Are opposed to each other, and a joint space is formed in the pair of arms 4a. Then, the receiving joint 4 is a joint portion protected by installing the steel pipe sheet pile joint protection device.

[0010] The steel pipe sheet pile 3 is formed such that after excavating a predetermined ground to form an excavation hole 6, the T-shaped joint 5 is inserted from above into the receiving joint 4 of the preceding steel pipe sheet pile 7 built in advance. And is installed in the excavated hole 6. Then, as shown in FIG. 1, the above-described steel pipe sheet pile joint protection device is inserted with its axis up and down between the arm tip portions 4b of the receiving joint 4 of the newly built steel pipe sheet pile 3.

At this time, a pair of guard plates 2a of the projection portion 2 are arranged so that both side surfaces of each arm tip portion 4b are sandwiched from right and left. After the steel pipe sheet pile joint protection device is installed as described above, the drilling hole 6 is filled with muddy water while mixing the solidifying material, and the muddy water is solidified. In FIG. 2, reference numeral 8 denotes a work for preventing the wraparound.

At this time, the solidified mud is blocked by the steel pipe sheet pile joint protection device, and is prevented from entering the joint space in the receiving joint 4. As shown in FIG. 1, if neoprene rubber or the like is attached to the tip of the arm of the receiving joint 4 inserted into the protrusion 4, the intrusion of the solidified muddy water is further effectively prevented. Then, after the mud is solidified, the steel pipe sheet pile joint protection device is pulled out.

Further, a cleaning scraper is inserted into the receiving joint 4, and muddy water is sprayed into the joint by a muddy water pump to wash the inside of the joint. By repeating this, the steel pipe sheet piles 3 are sequentially connected, and a predetermined underground wall or the like is constructed by the plurality of connected steel pipe sheet piles 3. When solidifying the mud,
Even if the solidified mud enters the receiving joint 4 and fills the joint, the solidified mud does not enter the cylindrical body 1 of the steel pipe sheet pile joint protection device, so that the cylindrical body 1 occupies. A space is secured in the joint by the space provided, and the inside of the receiving joint 4 can be cleaned using the space as an opening.

In the above embodiment, since the arm tip 4b of the joint is flat, the arm tip 4b
Each guard plate 2a of the steel pipe sheet pile joint protection device arranged on both sides of the joint part is also formed in a flat plate shape.
Is a ring-shaped cross section, as shown in FIG. 3, the guard plate 2a of the steel pipe sheet pile joint protection device is also made to have an arc-shaped cross section in accordance with the shape of the joint end 4b. Is not limited to a flat plate shape.

Further, as shown in FIG.
It may be protruded in a shape that branches off from the middle. In this case, the pair of guard plates 2 a
Is formed. In the above embodiment,
The tubular body 1 of the steel pipe sheet pile joint protection device has a circular cross section, but is not limited to this shape, and may have any other shape such as a square cross section.

[0016]

As described above, the steel pipe sheet pile joint protection device of the present invention closes the entrance formed by the pair of arms at the joint portion, and prevents solidified muddy water, mortar, etc. from entering the joint portion. Since the intrusion is prevented, it is possible to prevent the solidified muddy water, the mortar, and the like from being filled in the space in the joint portion.

Even if solidified muddy water, mortar, or the like enters and fills the joint, it does not fill the space occupied by the cylindrical body 1 of the steel pipe sheet pile joint protection device. A space can be secured, and cleaning of the inside of the joint does not become complicated.

[Brief description of the drawings]

FIG. 1 is a view showing a steel pipe sheet pile joint protection device according to an embodiment of the present invention.

FIG. 2 is a view showing the installed state of the steel pipe sheet pile according to the embodiment of the present invention.

FIG. 3 is a diagram showing a steel pipe sheet pile joint protection device according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a steel pipe sheet pile joint protection device according to a third embodiment of the present invention.

FIG. 5 is a view showing a means for protecting a conventional steel pipe sheet pile joint.

FIG. 6 is a view showing a second means for protecting a conventional steel pipe sheet pile joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Protrusion part 2a Guard plate 3 Steel pipe sheet pile 4 Receiving joint 4a Arm part 4b Arm tip part

Claims (1)

(57) [Scope of request for utility model registration] 1. A predetermined space is surrounded by a pair of arms protruding laterally from an outer peripheral surface of a steel pipe sheet pile, and a joint portion formed by opposing the front ends of both arms at predetermined left and right intervals is protected. A cylindrical body which can be inserted between both end portions of the joint with the shaft up and down, and left and right projecting from the outer peripheral surface of the cylindrical body toward each arm end of the joint portion. Each of the above-mentioned protruding portions is provided with a pair of guard plates which respectively extend along both side surfaces of the corresponding arm tip portion and which can sandwich the arm tip portion. Sheet pile joint protection device.