CN102963496A - Underwater positioning and installation method of flap gate - Google Patents

Abstract

The invention discloses an underwater installation method of a flap gate; the flap gate is a P-shaped structural gate; two groups of hinge points are adopted to fix when the gate is opened and closed; under the control of compressed air, the gate rotates for 90 degrees around the hinge points, and is opened and closed; after the gate is dragged to an entrance, the gate stably sinks by exhausting; the upper hinge points of the gate are manufactured to be totally matched with lower hinge seats; because the gate is installed at an underwater position far away the water surface for 13 meters, the light is quite dark, in order to make sure that the gate is accurately positioned, two groups of guide devices are manufactured on both sides of the entrance, so that the gate is accurately positioned when sinking; and the gate sinks stably with the help of a floating crane, and the gate is finally installed accurately.

Description

The location under water of flap caisson, installation method

Technical field

The present invention relates to a kind of installation method in ship building field, particularly a kind of location under water, installation method of flap caisson.

Background technology

Flap caisson is a kind of P shape structure dock gate, and as shown in Figure 1, its is long 70 meters, and is wide 6.6 meters, high 14.6 meters, and gross weight 1400T needs it steadily floatingly after completing, drag at last to assigned address and install.

Because the flap caisson build is larger, and weight is large, install for 13 meters under water, difficulty is large, setting accuracy requires high, and traditional way is that Jiang Dawu and Hai adopt the cofferdam to separate, and during installation the water in the large depressed place is discharged to outside the cofferdam, water level in the depressed place is descended, dock gate is along with decline, and water level drops to the installation site in large depressed place, regulates twisted point position on the dock gate, make it be mounted to lower twisted seat, the method no doubt pulsation-free dock gate is installed, but owing to will at first large Wu Shui be piled, again water in the depressed place is discharged, because about 800,000 m3 of water in whole large depressed place and the cofferdam, according to the discharge capacity of 2000 m3 per hour, all discharge needs about 16 day time, and needs a large amount of lift pumps and consume a large amount of electricity, add the cost that will excavate with the shutoff cofferdam, giving to install increases huge cost.

Summary of the invention

The present invention has overcome shortcoming of the prior art, and a kind of location under water, installation method of flap caisson is provided, take with dock gate fixedly the pressurized air in the water tank discharge, make dock gate gravity greater than buoyancy, naturally sink, and adopt crane barge to assist, final subsidence is installed to the installation site.

In order to solve the technical matters of above-mentioned existence, the present invention is achieved by the following technical solutions:

A kind of location under water of flap caisson, installation method, it specifically comprises the steps:

One, with dock gate fixedly the pressurized air in the water tank discharge, regulate the buoyancy of dock gate in water, make dock gate weight greater than buoyancy, dock gate is slowly sunk naturally, too fast for prevent that dock gate from sinking in water, adopt crane barge to pull from top, and the dock gate front and back position finely tuned, reach the purpose of location;

Two, increase by two groups of guided toolings in the dock gate both sides, reduce the underwater deviation of dock gate, position, the dock gate left and right sides is positioned, make dock gate accurate in hydrolocation, and utilize crane barge that the state of dock gate in the water is assisted fine setting;

Three, open fixedly water tank and morning and evening tides cabin blind flange, dock gate is slowly sunk, by diver's sinking state of tracing observation dock gate under water, on sinking to dock gate when twisted point and lower twisted seat installation site, to axially regulating of upper twisted point, make twisted point accurately be seated lower twisted seat, finish dock gate and install.

Because adopt technique scheme, the installation method under water of a kind of flap caisson provided by the invention compared with prior art has such beneficial effect:

The present invention installs by crane barge, and the method that adopts exhaust that dock gate is sunk, safe, easy and simple to handle, exhaust reduces dock gate buoyancy, dock gate is slowly sunk, and it is dynamic that crane barge can be regulated dock gate at any time, makes accurate positioning, uncontrollable factor is few, the setting accuracy controllability is strong, and the set-up time is short, and cost of installation is low.

Description of drawings

Fig. 1 flap caisson agent structure scheme drawing;

Fig. 2 is the auxiliary scheme of installation of dock gate crane barge;

Fig. 3 is that dock gate sinks to installing cross-sectional view;

Fig. 4 is twisted point and lower twisted seat installation process scheme drawing on the dock gate.

 

The specific embodiment

Below in conjunction with the accompanying drawing specific embodiment the present invention is described in further detail:

Flap caisson is located under water, is installed, and as shown in Figure 1, dock gate is long 70.4 meters, and is wide 6.6 meters, high 14.6 meters, gross weight 1400T, and its location, installation method are as follows:

One, the crane barge gib head be connected with 4 160T suspension centres above the dock gate finish after, as shown in Figure 2, the air diverter valve operating personal begins to open fixedly water tank venting valve, fixedly water tank exhaust, and constantly observe the dock gate state, after dock gate begins to tilt to descend, open simultaneously morning and evening tides cabin valve and carry out exhaust, because dock gate gas is discharged, cause buoyancy to reduce, dock gate slowly sinks under Action of Gravity Field, and at this moment, the crane barge gib head is followed dock gate and descended simultaneously;

Two, be 300T owing to dock gate does not have the weight in the entry fully, when all there are not in the entry when dock gate fully, continue row

Gas is by the descending speed of crane barge control dock gate; When sinking down into to suspend when upper twisted point and lower twisted seat distance is 1 meter left and right sides, dock gate descends, as shown in Figure 3, the diver begins to observe twisted point and the horizontal and vertical position relationship of lower twisted seat, wait move to require the position after, proceed, the diver observes the twisted point position constantly in safety zone;

Three, when upper twisted point and lower twisted seat distance reaches 0.5 meter left and right sides, dock gate stops to sink, the wait dock gate is stable, this moment is because the dock gate inclination, the twisted axis of adjusting before causing deflects, the diver adopts spanner, adjust to respectively the state that can cooperate with lower twisted seat with two than axle, again check the squareness of twisted axis, and adopt spanner to adjust, after hinge is vertical, the crane barge gib head continue to descend, and makes that twisted point falls into lower twisted seat fully on the dock gate, as shown in Figure 4, whole dock gate lies low fully in the hole, depressed place, and dock gate installs.

The above; only be the better specific embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.

Claims (1)

1. location under water, the installation method of a flap caisson, it is characterized in that: it specifically comprises the steps:

One, with dock gate fixedly the pressurized air in the water tank discharge, regulate the buoyancy of dock gate in water, make dock gate weight greater than buoyancy, dock gate is slowly sunk naturally, too fast for prevent that dock gate from sinking in water, adopt crane barge to pull from top, and the dock gate front and back position finely tuned, reach the purpose of location;

Two, increase by two groups of guided toolings in the dock gate both sides, reduce the underwater deviation of dock gate, position, the dock gate left and right sides is positioned, make dock gate accurate in hydrolocation, and utilize crane barge that the state of dock gate in the water is assisted fine setting;

Three, open fixedly water tank and morning and evening tides cabin blind flange, dock gate is slowly sunk, by diver's sinking state of tracing observation dock gate under water, on sinking to dock gate when twisted point and lower twisted seat installation site, to axially regulating of upper twisted point, make twisted point accurately be seated lower twisted seat, finish dock gate and install.

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