JP3676086B2 - Steel pipe pile foundation - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steel Kankui basis, in particular, to a suitable steel Kankui basis using the bridge foundation built on seabed.
[0002]
[Prior art]
FIG. 3 is a perspective view showing a conventional bridge foundation, which is different from the conventional caisson type foundation, which is a rigid structure, so as to surround the main tower 1 constituting the main part of the bridge and its lower part. A jacket-type foundation 3 provided with a provided jacket leg 2 is installed on the seabed ground 4, and a plurality of steel pipe piles 6, 6,... Are guided by the plurality of legs 5, 5,. This is a configuration placed on the ground 4.
In this bridge foundation, the sealing performance at the joint between the steel pipe pile 6 and the leg 5 when the steel pipe pile 6 is driven is important.
[0003]
FIG. 4 is a cross-sectional view showing a joint portion between a steel pipe pile 6 and a leg 5 of a conventional bridge foundation. A rubber seal material 7 is attached between the steel pipe pile 6 and the lower end of the leg 5, and the rubber seal material of the leg 5. A grout pumping tube 8 is provided at a position slightly above 7. And the grout 9 is inject | poured to the clearance gap between the steel pipe pile 6 and the leg 5 by this grout pressure sending pipe 8 to predetermined height. In this joint portion, the joint portion between the steel pipe pile 6 and the leg 5 is water-stopped by the rubber seal material 7, and leakage prevention at the time of injecting the grout 9 is intended.
[0004]
[Problems to be solved by the invention]
By the way, in the junction part of the conventional steel pipe pile 6 and leg 5 mentioned above, although the water sealing and the leakage prevention at the time of grout 9 injection | pouring are aimed at by the rubber sealing material 7, the rubber sealing material 7 is comprised by hard rubber etc. For this reason, there is a problem that wear or the like is likely to occur due to an impact at the time of driving the steel pipe pile 6, durability as a sealing material is insufficient, and sufficient water stoppage cannot be obtained.
[0005]
Further, when the joint portion between the steel pipe pile 6 and the leg 5 is located below the surface of the water, the rubber seal material 7 has insufficient durability as a seal material, and a sufficient water stoppage cannot be obtained. There was a problem that the water stoppage at the time of injecting was insufficient and the grout 9 leaked.
[0006]
The present invention was made in view of the above circumstances, it is possible to improve the water-stopping at the junction of the steel pipe pile and leg steel pipe that can be prevented from leaking grout during grouting The purpose is to provide pile foundation.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a steel Kankui basis such as following.
That is, the steel pipe pile foundation according to claim 1 is composed of an annular and plate-like sealing material having elasticity and water-stopping properties at a joint portion between the tubular leg and the steel pipe pile inserted through the leg. A plurality of steel pipe pile foundation seals having different lengths at one end and the other end along the circumferential direction of the seal material are mounted up and down, and along the circumferential direction of these steel pipe pile foundation seals. One end is elastically pressed to either the leg or the steel pipe pile, and the other end is elastically pressed to the other one of the leg or the steel pipe pile. One of the seals is filled with a filler above the uppermost one of the seals, and another one of the seals for the steel pipe pile foundation disposed at the lowermost side is different from the filler. It is characterized by being filled with a filler .
[0008]
Steel Kuimoto foundation of claim 2 wherein the Oite steel pipe Kuimoto foundation of claim 1, wherein said sealing material is characterized by comprising a brush-type seal.
[0009]
The steel pipe pile foundation according to claim 3 is characterized in that, in the steel pipe pile foundation according to claim 1 or 2 , the another filler is injected from a place different from a place where the filler is filled . .
[0012]
The steel pipe pile foundation according to claim 1 or 2, wherein the present invention, for example, mounted in a plurality vertical steel pipe pile foundation seal consisting of a brush-type seal at the junction between the legs and the steel pipe pile, these steel pile foundation seal The one end of the elastic member is elastically pressed to either the leg or the steel pipe pile, and the other end is elastically pressed to the other one of the leg or the steel pipe pile. The sealing performance at the joint is increased, and the water stoppage is improved. Accordingly, even when the joint is filled with the filler, the steel pipe pile foundation seal prevents the filler from leaking, and the possibility of the filler leaking outside is eliminated.
In addition, by filling different fillers above each of the plurality of steel pipe pile foundations, leakage of the filler by another filler can be prevented.
[0013]
In the steel pipe pile foundation according to claim 3 , when another filler is filled from a place different from the place where the filler is filled, water-stopping management at the time of placing the filler with another filler is achieved. At the same time, the leakage of the filler is prevented.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a steel pipe pile foundation seal of the present invention and a steel pipe pile foundation using the same will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a side view showing a joint portion between a steel pipe pile foundation leg and a steel pipe pile according to the first embodiment of the present invention. In the figure, 11 is a tubular leg 5 and the leg 5 is inserted. This is a brush-type seal that is attached to the joint between the steel pipe pile 6 and used as a seal material between the machine and the segment in the tail part of the shield machine, and with a water pressure of about 20 kgf / cm ₂ However, it has sufficient water-stopping property.
[0015]
The brush-type seal 11 has a structure in which spring steel, wire brush, and stainless steel wire mesh are combined, and a cylindrical upper member disposed along the inner peripheral surface of the leg 5 and gradually contracted downward from the lower end of the upper member. It is constituted by a substantially funnel-shaped lower member that extends so as to have a diameter and winds along the peripheral surface of the steel pipe pile 6, and has a followability that can sufficiently cope with the deviation between the steel pipe pile 6 and the leg 5. In other words, due to the elasticity of the brush-type seal 11, even if a deviation occurs between the steel pipe pile 6 and the leg 5, it can be dealt with immediately.
In addition, if the pile length is about the steel pipe pile 6 to be cast, it has sufficient durability against the deterioration of the sealing performance due to friction or the like associated with the hit when the steel pipe pile 6 is driven. It also has sufficient water-stopping properties at several tens of meters.
[0016]
Next, a method for placing a steel pipe pile foundation using the brush-type seal 11 will be described.
First, the upper member of the brush-type seal 11 is mounted in advance on a portion that hits the joint portion inside the leg 5. Next, the steel pipe pile 6 is inserted into the leg 5 using the leg 5 as a guide. At this time, since the lower member of the brush-type seal 11 extends toward the axial center, the brush-type seal 11 is expanded by the inserted steel pipe pile 6 and is pressed against the steel pipe pile 6 by its elastic force.
[0017]
Next, the steel pipe pile 6 is driven on the seabed ground. Here, the waterproofness of the joint between the leg 5 and the steel pipe pile 6 is maintained by the elasticity and the waterproofness of the brush-type seal 11. This water stoppage is particularly effective under the water surface.
Next, a grout (filler) 9 is injected into the gap between the steel pipe pile 6 and the leg 5 above the brush-type seal 11 to a predetermined height using the grout pressure feed pipe 8.
[0018]
In this steel pipe pile foundation, by attaching the brush-type seal 11 to the joint between the leg 5 and the steel pipe pile 6, the adhesion between the leg 5 and the steel pipe pile 6 increases, and the sealing performance at the joint increases. As a result, the water stoppage at the joint is improved.
Even when the grout 9 is injected into the joint portion, the brush-type seal 11 prevents the grout 9 from leaking, so there is no possibility that the grout 9 leaks to the outside.
[0019]
As described above, according to the present embodiment, since the brush-type seal 11 is attached to the joint portion between the leg 5 and the steel pipe pile 6, the sealing performance at the joint portion can be improved. The water-stopping property of the joint can be improved. Accordingly, even when the grout 9 is injected into the joint portion, the brush-type seal 11 prevents the grout 9 from leaking, so that the grout 9 can be prevented from leaking outside from the joint portion.
[0020]
[Second Embodiment]
FIG. 2: is a side view which shows the junction part between the leg of the steel pipe pile foundation of the 2nd Embodiment of this invention, and a steel pipe pile, and this steel pipe pile foundation is the steel pipe pile foundation of 1st Embodiment mentioned above, The difference is that in the steel pipe pile foundation of the first embodiment, one brush-type seal 11 is attached to the joint between the leg 5 and the steel pipe pile 6, whereas in the steel pipe pile foundation of the present embodiment, A plurality of (two in FIG. 2) brush-type seals 11 are attached to the joint between the leg 5 and the steel pipe pile 6 in the vertical direction, and the grease injection pump 21 and the grease injection pipe 22 are used. The point is that grease (filler) 23 is injected between the brush-type seals 11 and 11.
[0021]
According to this embodiment, even when the steel pipe pile foundation of the first embodiment does not provide a sufficient water-stopping effect, a plurality of brush-type seals are provided at the joint between the leg 5 and the steel pipe pile 6. By mounting 11, the water stoppage between the leg 5 and the steel pipe pile 6 can be greatly improved. Further, since the grease 23 is injected between the brush-type seals 11, 11, it is possible to prevent leakage of the grout 9 when the grout 9 is injected.
[0022]
Furthermore, when the grease 23 is injected, by managing the grease 23 injected by the grease injection pump 21, it is possible to manage the water stoppage when the steel pipe pile 6 is installed.
[0023]
As mentioned above, although each embodiment of the steel pipe pile foundation seal of the present invention and the steel pipe pile foundation using the same has been described based on the drawings, the specific configuration is not limited to this embodiment, Design changes can be made without departing from the scope of the invention. For example, the sealing material may be an annular and plate-like sealing material having elasticity and water-stopping property, as long as the length of one end along the circumferential direction is different from the length of the other end. It is not limited to the mold seal 11. Moreover, the number, the attachment position, etc. can be changed as needed.
[0024]
In addition, when the water stoppage is insufficient, one or more brush-type seals 11 may be further mounted between the two brush-type seals 11 and 11. In this case, if the grease 23 is injected between the brush-type seals 11, 11, the water stoppage is further improved.
[0025]
【The invention's effect】
As described above, according to the steel pipe Kuimoto foundation according to claim 1 or 2, wherein the present invention, for example, a steel pipe pile foundation seal consisting of a brush-type seal more vertically at the junction between the legs and the steel pipe pile Attach and elastically press one end of the steel pipe pile foundation seal to either the leg or the steel pipe pile, and elastically press the other end to the other leg or the steel pipe pile Since the pressure contact is made, the sealing performance at the joint can be improved and the water stoppage can be improved. Accordingly, even when the joint is filled with the filler, the steel pipe pile foundation seal prevents the filler from leaking, so that the filler can be prevented from leaking to the outside.
Moreover, since a different filler is filled above each of the plurality of steel pipe pile foundations, it is possible to prevent leakage of the filler due to another filler.
[0027]
According to the steel pipe pile foundation according to claim 3 , since the other filler is filled from a place different from the place where the filler is filled, the water stoppage management at the time of placing the filler with another filler is performed. In addition, the leakage of the filler can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view showing a joint portion between a steel pipe pile foundation leg and a steel pipe pile according to a first embodiment of the present invention.
FIG. 2 is a side view showing a joint portion between a steel pipe pile foundation leg and a steel pipe pile according to a second embodiment of the present invention.
FIG. 3 is a perspective view showing a conventional bridge foundation.
FIG. 4 is a cross-sectional view showing a joint portion between a steel pipe pile and a leg of a conventional bridge foundation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main tower 2 Jacket leg 3 Jacket type foundation 4 Submarine ground 5 Leg 6 Steel pipe pile 7 Rubber seal material 8 Grout pressure feed pipe 9 Grout (filler)
11 Brush type seal 21 Grease injection pump 22 Grease injection pipe 23 Grease (filler)

Claims (3)

The joint between the tubular leg and the steel pipe pile inserted through the leg is made of an annular and plate-like sealing material having elasticity and water-stopping property, and one of the sealing materials along the circumferential direction of the sealing material Attach multiple steel pipe pile foundation seals with different lengths at the end and the other end .
Elastic one end portion along the circumferential direction of the steel pipe pile foundation for seal with resiliently pressed against one of the legs or steel pipe pile, the other end to the other of said leg or pipe pile to pressure contact and, together with formed by filling the filling material above the one arranged in the uppermost of these steel pipe pile foundation seal, disposed at the bottom side of these steel pipe pile foundation seal A steel pipe pile foundation characterized by being filled with another filler different from the filler above another one . The steel pipe pile foundation according to claim 1, wherein the sealing material comprises a brush-type seal . The steel pipe pile foundation according to claim 1 or 2, wherein the another filler is injected from a place different from a place where the filler is filled.

Images