JPS60105714A - Consolidating and levelling weight for underwater rubble-mound - Google Patents

Abstract

PURPOSE:To consolidate and level a top end through proper regulation and setting of the free drop distance of a weight, by a method wherein a weight plate is secured to the lower end of a support form fabricated from steel material, and scales, extending in the direction of the height of the support form from the bottom serving as a starting point, are located to given portions of the support form. CONSTITUTION:A weight (a), suspended by means of a wire, is lifted down on an underwater rubble-mound foundation, and a distance of a top end consolidated and the direction of projection and recess thereof are detected from the degree of projection from the water surface of a support form 1 and the inclination thereof. Thereafter, the weight (a) is repeatedly lifted up to a given height and freely dropped the given number of times to carry out rough levelling. The height of the top end is measured by the use of a measuring device 12 and graduations 3, and according to such results, consolidation is made through free drop of the weight (a). This enables detection of the distance of the top end consolidated and the direction of projection and recess, and allows proper adjustment of a drop distance, and since the center of gravity is low and safety is high, a consolidating work made by free drop can be carried out effectively.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides underwater rubble to be constructed for installing and fixing structures such as caissons when constructing breakwaters, etc. 11.6'
This relates to a weight used to consolidate and level +a.

(F, IE technology) As this type of weight, a vibrating pile +ti is fixed to the head of a hollow casing made of reinforced concrete or tlllM, and a reinforced concrete shoe is rigidly connected to the lower end. Vibratory compaction equipment (rT issued by the Ministry of Transport and Construction of the USSR)
PAHcnOPTH'OE CTPOnTEAbcTB
oJ December 1973 issue), or a bell-shaped weight for compacting by free falling (``Minato Manjiron'', published by Shukyosha Co., Ltd., November 15, 1952).

[Problem that the invention seeks to solve]

The above-mentioned vibratory compaction device generates buoyancy in the hollow casing and cannot sufficiently transmit the excitation force of the vibratory pile driver to the underwater rubble foundation, and the foot of Qgi under the hollow casing is made of reinforced concrete W and is weak. The vibration compaction capacity is not always sufficient, especially after repeated use for a long period of time.
Cracks occur in the shoe itself, and the same can be said of hollow casings as long as they are made of reinforced concrete.

In addition, the above-mentioned bell-shaped weight is inconvenient for measuring and setting the free fall distance (height), and is also inconvenient for directly grasping the unevenness and inclination of the top surface of the underwater rubble foundation at the falling position. is of no use.

The present invention seeks to solve these problems.

[Means for solving problems]

In the present invention, a weight plate made of extra-thick steel plate is fixed to the upper end of the support frame made of 31/1 material assembly, and a scale is provided at the required part of the support frame to serve as a weight for consolidation and leveling of underwater rubble foundations. .

[For production]

According to the present invention, powerful consolidation and leveling can be achieved by colliding a weight plate made of extra-thick steel plate with the top of an underwater rubble foundation. It is possible to check the unevenness and slope of the 44 surface and perform the corresponding consolidation work, and also measure the iG+ height of the top h1;1 using the scale provided on the support frame and calculate the free fall distance of the weight. 21 (height) as appropriate, it is possible to consolidate and level the top end to the same height as 81.

[Example] The consolidation leveling weight of the present invention is adapted to the leveling width of the top of the underwater rubble foundation, the shape or dimensions of the structure such as a caisson to be installed, the water depth, the capacity of the crane ship, etc. The caisson is manufactured in advance at -1°, etc. using a shaped steel and extra-thick A, 1 plate.

This consolidation leveling weight a has a weight plate 2 fixed to the bottom of the support frame 1 (・1:, 1), and a scale scale 3 that runs in the height direction of the support frame 1 at a required part. The support frame 1 is made up of four supports 4, beams 5 and braces 6 arranged at appropriate intervals, and assembled with shaped steel into a prismatic tower shape.
A weight plate 2 is fixed to its lower end.

The weight plate 2 is formed into a rectangular shape from an extremely thick steel plate, and has steel protrusions 7 for tamping arranged in rows at required intervals on the lower surface, and penetrates from the lower surface to the upper surface in the portion between each protrusion 7. Drain holes 8 are arranged in a row to reduce resistance during lifting and lowering, and to prevent small rubble from being blown away by water pressure.

The above scale scale number 3 is manufactured separately from the support frame 1 and displays a scale of about 1 cmfii starting from the bottom surface of the weight plate 2.
It is attached to the outer surface of each of the pillars 4 so that at least the upper part protrudes from the water surface when it is suspended from the top of the underwater rubble foundation.

Reference numeral 9 denotes hanging tools attached to the four corners of the upper end of the support frame 1, on which wire ropes for hanging with a crane are hung.

Consolidation and leveling of an underwater rubble foundation using the weight a configured as described above is carried out as follows.

First, by putting in the necessary rubble, the top is +41
Form an underwater rubble foundation slightly higher than the height of the painting. Then, heaven, i::1 side 6: hl with rod 10 5
Display it with a little more margin than the width of one car, check the excess and deficiency of rubble while making the necessary inspections, and calculate the height θ1j,
1 is slightly higher than the planned height.

Then, lower the weight a suspended from the crane 1+n by weight 1 onto the underwater rubble foundation, and check the height of the support frame l according to its protrusion above the water and its inclination.11. Detect the amount of pressure f (higher than the planned height) and the direction of the unevenness, lift the single spindle a to the required height and drop it 1:11 times a required number of times (13), and then stand up. 1) Roughly level the surface so that the weight a does not wobble.

Next, surveying: ￥f13 reads the scale scale 3 displayed on the pillar 4 of the plumb a, which is suspended and erected above the top using the surveying instrument 12 installed at a fixed point, for example, the existing caisson 11. Measure the height of the crown using 7, and notify the crane ship operator of the exact value to be measured using a transceiver.

Based on the value, the operator adjusts the lifting height of the weight a, that is, the free fall distance a11, and
The top is tamped by lifting and free falling, that is, performing two downward movements the required number of times, and depending on the degree of tamping, further adjust the free fall distance with the surveying instrument 12 and scale scale 3. The height of the top is measured and tamped again based on the results by free falling of the weight a. By appropriately repeating the tamping work and measurement work, the underwater rubble foundation can be consolidated and leveled to the same height as the four cars.

In this embodiment, the support frame 1 and the weight plate 2 are square in plan, but are not limited to this, and it is clear that they may be circular in plan, for example.

〔Effect of the invention〕

The consolidation and leveling weight of the present invention has the following effects.

■ Since the support frame has a height corresponding to the structure such as a caisson installed on the underwater rubble foundation, the amount of pressure to be measured at the top and The direction of the unevenness can be detected, and the height of the top can be easily measured as necessary using a scale scale provided at the required part of this support frame, starting from the bottom of the weight plate, and by this, the height of the suspension, that is, the free fall distance can be easily measured. Mon Festival as appropriate - (Kii 1
゜■ Support frame i, l/l +71 set 1. '') Since it is a Seki, in the middle of 4) Self 1 + Fall - 1 · Support l (I:i) will not be generated, and under that support frame, it will be extremely thick to 5Hjj. Fix the main weight plate -(l(ru4)
Because the center of gravity is low and stability is low,
Consolidation work can be carried out effectively in free fall.

■ 11 (] Anti-G, 1, l-i I like myself Hl t
Made by DJ Inoku (2 pieces) Highly durable, made of reinforced steel.
(Since it does not have the same fragility as the one in the Wei, it does not have to be used repeatedly, is suitable for the second one, and is easy to assemble.

[Brief explanation of drawings]

1 and 2 C of the drawings are a front view and a front view of the weight leveling machine according to the present invention, and FIG. 3 is an explanatory view of the state of implementation of the weight leveling process using the weight. 1...branch (4", 2...111 anti, 3...scale scale.

Claims (1)

[Claims] 1. The lower θ of the support frame of the 14-wood silk stand, which has a height corresponding to the structure such as the 1-son to be installed on the underwater rubble foundation.
j1. ), (・7λ thick forceps [A weight for compacting and leveling underwater rubble V foundations, characterized by having a plate weight plate fixed to it and a height.