JPS5826109A - Compaction work for soft ground - Google Patents

Abstract

PURPOSE:To compact soft ground to give it any strength by applying a strike or a vibration onto the upper end of a rod whose lower end is provided with a consolidation part for compacting the ground. CONSTITUTION:A consolidation part 2 provided at the tip of a rod 1 is placed on the seabed, and a strike or a vibration is applied to the part 2 by a hammer device, e.g., a Diesel pile hammer H, etc., provided to the leader L of a crane ship S so as to compact soft ground G or mound M through the rod.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses a soft ground compaction method 1fc@ in 0WItIIL1 in order to strengthen or level the unevenness of soft ground under water such as submarine ground.

In recent years, the foundations of modern port facilities generally have to be set on soft ground beneath the water surface, and for this purpose conventionally the 11-layer slender layer treatment method III has been used, but these construction methods have a soft ground layer of 0. Since the purpose of this project is to construct a permanent 1km-long structure in the area of IIIK, effective construction methods have not been developed for temporary port structures that do not belong to IIIK.
In the conventional method, hammers such as contour blocks and weights were suspended from a turbine ship to allow them to fall naturally and compact the soft seabed ground. ! - Sufficiently effective compaction 5δγ 51° by means of iris etc. This invention is a construction method developed in view of the current situation. *A rod whose other end is exposed at least above the water surface when S is placed on the seabed.An embodiment of the present invention will be described below with reference to the drawings.

Diagram 4 (a) Φ) #'i A simple explanatory diagram showing the present invention, 0
) is a rod for impact or vibration transmission, and one end of the rod is provided with a consolidation part (Q) for compacting the soft ground (G) or mound (3) at the bottom of fIi, and the consolidation part ( 2) is placed on the seabed, the other end of the rod α) (lb)
At least the diesel pile hammer (H) installed on the leader (L) of the water TjjJK crane ship (S)
) etc. by applying impact or #i vibration to soft ground (G) or mount (2) via rod α).
1. This is a method of hardening.

In this case, the consolidated part (the part is in the shape of a flat plate, with soft ground or
This makes it possible to compact finished mounds with high precision and efficiency.

Figures ffi@(a), (b), and (C) show various shapes of the consolidated part, and Fig. 2 C) shows the consolidated part of one end (of the rod α) formed by a flat plate (phantom). The flat plate (2') is attached to one end of the rod (1a), and is reinforced with ribs (3) (3) provided around the one end (1a). . In the same figure, the plane [(2') is shown as a rectangular plate shape, but it is not limited to a rectangular plate shape. Fig. 2 (b) and (e) show one end of the rod II (1 IIC@
This figure shows a case in which one or more flat plate-shaped consolidation parts (2") cone-shaped projections) are formed, and these consolidation parts (2") #'i are particularly suitable for soft ground. I
It is valid for g.

No. s! ! ll has a compacted part (2"') shaped into a pointed shape, and can be applied not only to compaction of soft ground but also to rock crushing ships, and can also be used for dredging coral reefs etc. It has a wide range of applications.

As mentioned above, the present invention not only has a simple configuration, but also
Because the work can be done in the same way as the conventional mechanically penetrated driven pile, it is possible to form a foundation ground with excellent consolidation effects in a short time, and it is useful for improving the bearing capacity of the foundation ground on the seabed and preventing uneven settlement. In addition, it is possible to inspect unevenness on the water surface even at depths and transparency that have been difficult to finish until now, allowing for highly accurate finishing and an extremely effective method for detecting soft ground.

[Brief explanation of the drawing]

Figure 4C) is a simplified explanatory diagram showing the construction method of the present invention, and Figures 2(a), (b), (e) and 3 are explanatory diagrams showing various shapes of the consolidation part.1- −−−−−−−−−−−1・−1 rod fi,
3', fl, 211#--consolidation part 3--------
---・-・Kotopu 4……Protrusion Figure 2 (0) Figure 3 (b) (C)

Claims (1)

[Claims] α) One end has a consolidation part for compacting the ground, and the other end of the pitcher is exposed at least above the water surface when the pitcher is placed on the seabed ground. A compaction method for soft ground, characterized in that the other end of the rod is subjected to impact or vibration to compact the ground to a desired strength or to a desired precision. (2) A compaction method for soft ground according to claim 1, characterized in that the pressure ** is in the shape of a senryo board. Claim 1 or 2 Claim 01 characterized in that it has a plurality of shapes.
cII soil compaction method. C) Patent claim o characterized in that the consolidation part is pointed-shaped
Compaction method for soft ground as described in MIM No. 1g