JPS6353335B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a caisson with a lid, in particular, a caisson with a lid that is filled with sand by pumping and filling the inside of the caisson with sand and water in a slurry state using a water conveyance method using a sand pump or the like. A caisson body with a lid whose interior is partitioned into a plurality of chambers by a plurality of partition walls, a passage hole for filling material formed at both upper ends of each of the partition walls, and a plurality of It is characterized by comprising an inlet for filling material provided in each of the chambers, and a drain port provided at or near a corner of the upper surface of the caisson body, so that filling can be performed from the chamber at any position. do.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a caisson 1 with a lid. The lidded caisson 1 of the present invention has an upper lid 2 unlike a normal caisson, and has six partition chambers 4 partitioned by a middle partition wall 3. Also, each partition wall 3
A plurality of communication holes 5 are opened at both ends of the upper part of the chamber to allow sand water, which is conveyed for slurry to be deposited and is supplied from an injection port 6, to flow to the next chamber. Further, the injection pipes 8 connected to the injection port 6 are each connected to a common injection pipe 10 via flow rate adjustment valves 9. The plurality of chambers 4 are each provided with the inlet 6, and a drain port 7 is provided at or near a corner of the upper lid 2.

The caisson with a lid, which has been integrally fabricated on land and towed, is placed in a predetermined installation position by pouring water into it and setting it down. As shown in FIG. 2, an earth carrier 12 loaded with a filling material 11 made of ordinary sand is placed on standby near the caisson 1 with a lid set at the planned position, and a sand pump 13 equipped with the earth carrier 12 is placed on standby. Immediately after the caisson is installed, the filling material 11 sucked from the caisson is pumped into the caisson in the form of a slurry of sand and water through the injection pipe 10 connected to the caisson and the injection port 6 at the top of the caisson. The inside of the caisson 1 with a lid is in a sealed state, and the mixed liquid pumped by the sand pump 13 presses out the water that had been filled inside for settling, and this discharged water is passed through the drain port 7 to the injection pipe. At the same time as the filling material 1 is connected, it is recycled into the cargo hold of the earth carrier through the drain pipe 14 that has been connected, and the filling material 1 is recycled again.
It is used for suction assistance in step 1.

As a method of filling the caisson 1, for example, open the injection valve 9 of only one chamber of each partition 4, and fill all the valves 9 for other chambers with an amount that does not affect the closing load balance and the strength of the partition wall. After filling the chamber with a predetermined amount, the valve 9 of the next chamber is opened, and the valve 9 of the previous chamber is closed. By repeating this in sequence for all the rooms, it is possible to fill them evenly. It is also possible to simultaneously inject into each chamber after opening all valves and adjusting the flow rate by operating the valves to balance the pressure in each branch pipe.

According to the present invention, the inside is sealed by the lid,
Moreover, even in a caisson separated by a partition wall,
The circulation holes are located at both upper ends of the partition wall, so when a mixture of sand and water is injected with a pump, the water in the room is smoothly drained as it fills up, and the injected sand flows through the upper ends of the partition wall. By flowing into each corner of each empty chamber through the circulation holes provided in the sand, the sand is sufficiently filled to the top of the chamber, and as a result, the filling rate of sand in each empty chamber is close to 100%. effective.

In addition, each of the multiple partitioned chambers is provided with an inlet for filling material, and a drain port is provided at or near the top corner of the caisson body, so filling can be done from any chamber, making it possible to fill the filling material while taking into account the load balance. It has the great advantage that it can be filled with water, and the pressure-receiving strength of the partition wall is also very advantageous.

[Brief explanation of the drawing]

FIG. 1 is an explanatory perspective view of a caisson with a lid according to the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is an explanatory plan view thereof. 1... Caisson with lid, 2... Top lid, 3... Middle partition wall, 4... Partition chamber, 5... Distribution hole, 6... Inlet, 7...
Drain port, 8... Injection pipe, 9... Flow rate adjustment valve, 10
...Injection pipe, 11...Filling material, 12...Earth carrier, 13...
Sand pump, 14...Drain pipe, 15...Mound.

Claims (1)

[Claims] 1. A caisson body with a lid whose interior is partitioned into a plurality of chambers by a plurality of partition walls, a passage hole for filling material formed at both upper ends of each of the partition walls, and a hole provided in each of the plurality of chambers. What is claimed is: 1. A caisson with a lid, comprising an inlet for filling material, and a drainage port provided at or near a corner of the upper surface of the caisson body, so that filling can be performed from a chamber at any position.