JPS6145027A - Fixation of pile and base seat - Google Patents

Abstract

PURPOSE:To obtain a given grout strength by a method in which a flexible film bag is set in piles driven through the base seat of the bottom ground under water, and a grout is injected into the bag and hardened to fix the pile and the base seat. CONSTITUTION:A pile 2 is penetrated through a cylinder 3 into the ground under water, and a grout injection hose 8 is connected to an inlet 4 for grout. When a grout 9 is injected into the inlet 4, the flexible bag 5 is expanded by the injecting pressure of grout to close the aperture between the cylinder 3 and the pile 2. The hose 8 is then removed out, and the grout 9 is hardened to fix the pile 2 and the base seat 1. Since the grout can be injected under a dry condition without water, the grouting work can be made exactly and the same grout strength as in the case of onshore grouting work can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of fixing a pedestal of an underwater structure and a pile for anchoring the pedestal to the underwater ground.

(Prior art) In the conventional method of fixing the pedestal and pile of an underwater 11.1 structure, a pipe is attached to the gap between the cylinder attached to the pedestal side and the pile penetrated into the underwater ground through the cylinder. In order to fill the grout, leakage prevention measures are provided at the top and bottom of the filling part, and since the grout is cast underwater, the return hose is connected from the top of the filling part offshore to increase the reliability of the grouting work. Quality control is carried out by measuring the grout used in the bath.

(Problems to be Solved by the Invention) If the conventional force V is applied, a large amount of grout is required compared to the amount of grout in the filled part, and the grout is discharged from the return hose. This requires a seal to prevent leakage and a return hose.Also, the seal I needs to be damaged by friction with the pile, so it is costly.

Furthermore, when measuring the ``M'' final grout density, there are concerns about quality control regarding shoes with underwater grouting.

(Means for Solving the Problems) The present invention was proposed in order to solve these problems, and includes a pedestal that sits on the underwater ground, and a pedestal that penetrates the pedestal and penetrates into the underwater ground. This relates to a method for fixing a pile and a pedestal, characterized in that a flexible membrane bag is interposed between the pile and the pedestal, and grout is injected into the bag and hardened to fix the pile and the pedestal. be.

(Function) As described above, in the present invention, grout is injected directly into the gap between the pedestal of the underwater structure seated on the underwater base Jlh and the pile that penetrates the pedestal and into the underwater base ground. Instead, a flexible membrane bag was inserted into the gap, and grout was injected into the gap and hardened to fix the pile and the pedestal. Since it is carried out in a dry state with no water removed, reliable construction is possible, and the grout strength can be expected to be the same as when pouring on land.

(Example) The present invention will be described below with reference to the illustrated embodiments.

(1) is the pedestal of the underwater structure seated on the underwater ground; (2)
is the tube attached to the same pedestal (1), (3) is the same tube (2)
A former grout inlet (4) is provided on the outer surface of the tube (2), and the pile penetrates into the underwater ground.
A flexible membrane bag (5) for preventing the grout from dispersing into the water is attached to the inner peripheral surface of 2). Note that the inside of the spacer (5) is almost a vacuum.

Furthermore, ring-shaped stress transmitting protrusions (6) (force) are provided on the inner circumferential surface of the tube (2) and the outer circumferential surface of the pile (2), respectively.

As shown in FIG. 1, after the pile (2) penetrates the tube (3) and penetrates into the underwater ground, the grout injection hose (8) is connected to the grout material injection port (4) using a dipper.

At this time, the inside of the grout injection hose (8) is filled with grout material to prevent water, air, etc. from entering the grout filling section.

Then, the pulp of the injection port (4) is opened and the grouting material (9) is injected through the grouting hose (8).
The 1'' flexure membrane bag (5) is expanded by the injection pressure of the grouting material and closes the gap between the tube (3) and the pile (2).

When the grouting operation is thus completed, the injection port (
4), close the pulp, remove the grouting platform (8), harden the grout material (9), and remove the pile (2) and pedestal (1).
) and fixed.

The fixing part of the pedestal (1) and the pile (2) was fixed by the method of the above embodiment, and the grout material (9) was The stress transmitting protrusion (6) (71) resists by the shear force between
) is resisted by the compressive force acting on the stress transmitting protrusion (7) of the grout material (9).

Furthermore, regarding the horizontal force applied to the pedestal (1), since the grout material (9) is filled between the tube (3) and the pile (2), no backlash occurs and the grout material (9) resist by the compressive force of.

FIGS. 5 and 6 show another embodiment of the present invention, in which a flexible container 00 which becomes donut-shaped when freely inflated is used instead of the flexible membrane bag (5), With the grout injection hose (8) connected, attach the flexible container 01)) to the pile (
2) and the cylinder (3), and the flexible container (101
A grout material (9) is injected into the inside.

In the drawings, parts equivalent to those of the above embodiment are given the same reference numerals.

(Effects of the Invention) As described above, in the present invention, grout is injected into a flexible membrane bag interposed between a pedestal and a pile that passes through the pedestal, and is hardened to fix the pedestal and the pile. As a result, grouting is carried out in a dry state with water removed, and reliable TC construction is not performed, and the same grout strength as in the case of on-shore grouting can be expected. Furthermore, since there is no need to circulate the grout material, construction can be performed with a small amount of grout material, and grout treatment facilities after circulation are not required.

Further, according to the method of the present invention, there is no need to attach a return hose as in the conventional method, so there is less work to do with the dipper underwater, the construction period is shortened, and there is no need for expensive sealing materials.

[Brief explanation of drawings]

1 and 2 are vertical sectional front views of the right half showing the steps of an embodiment of the method for fixing a pile and a pedestal according to the present invention, and FIGS. 3 and 4 are FIGS. 1 and 2, respectively. FIGS. 5 and 6 are vertical sectional front views of the right half showing steps of other embodiments of the method of the present invention. (1)...pedestal, (2)...pile, (3)...tube,
(5)... Flexible membrane bag, (9 (... Grout material, 0
01...Flexible container Sub-agent Patent attorney Shige Okamoto 3 other persons 1st ward 3rd ward 20 Figure 4 57 67

Claims (1)

[Claims] A flexible membrane bag is interposed between a pedestal seated on the underwater ground and a pile that has penetrated the pedestal into the underwater ground, and grout is injected into the bag and hardened to connect the pile and the pedestal. A method for fixing a stake and a pedestal.