"Ten million container single terminal as an example, to talk about the very vivid and easy to understand the "box space" things. Before saying "box space", let's look at a small problem. Below with a formula to explain the berth utilisation rate and berth occupancy rate, although to help you pick out the key points, but there are still diligent and studious friends are not satisfied, asked: this "berthing gap coefficient" is what is the meaning of?
Here is an example:
Like your home community underground car park, the general width of the parking space are wider than the car some, in order to empty the necessary space between the car and the car, in order to facilitate your car at any time in and out of the parking space is not to scrape the neighbouring vehicles.
Car park rows of parking spaces are equivalent to our berths (see below), the car in the parking space is equivalent to berthing operations of the container ship, and this "berthing gap coefficient" is to reserve space for ships to enter and exit the berth and set up, generally for a fixed value of 1.1.
Because this gap occupation is a necessary condition for ship berthing operations, so in the calculation of berth utilisation and occupancy must be added to it. Now you look back at the formula above, is not a better understanding?
Let's get back to the topic
Being in the "ten million" single container terminal, you must have seen many such scenes:
There is also this:
Sigh spectacular, is not there dense? Do you know exactly how many boxes in the Dabei three yards? I give you a few figures:
Dabei three yard area of 1,837,000 square metres, can stack boxes 230,000 TEU, perennial stacking capacity of about 150,000 TEU. If these boxes are lined up head to tail you drive on the top of the box, you have to drive for about 9 hours! So many building blocks as the container can be so neat, because there is a set of coding system to make these boxes "settled".
It can also be said that, in the container terminal yard, each box has a belong to their own ID, which is the "box position".
Our controllers and gantry crane drivers rely on this "ID", in order to accurately locate a box in the thousands of boxes in the pile, and command and lifting.
If you still feel like you don't understand, then I will help you to put the elephant in the refrigerator in 5 steps, watch out~!
The first step, the whole yard, according to the "district" division
According to the order of berths, each berth corresponds to a district. Such as berth 1 corresponds to 1 zone, berth 2 corresponds to 2 zone ......
Second step, each zone is divided into "blocks".
Such as District 5, in accordance with the order of the sea side to the land side, respectively, 5-1, 5-2, ......, if the number to the 10th block is not finished, then use 5-A, 5-B, ......
The third step, each block is divided into "Bay".
The English word is BAY, which corresponds to the BAY of the ship's box. By convention, the odd numbers indicate the placement of 20-foot small boxes, and the even numbers indicate the placement of 40-foot large boxes. Words are too abstract, it's better to look at the picture:
The fourth step, each shell is divided into columns.
Each bay has 6 columns, 1, 2, 3, 4, 5 and 6 from the side near the driveway.
The fifth step, each column is divided into "layers
English for "TIER", generally 4-5 layers, from the bottom up, in order of 1, 2, 3, 4 ......, or just that Bay.
Well, so the five steps together, you can easily say a container box. This is a reasoning, is not that actually quite simple it ~ you know why some boxes are tightly closed seam by seam piled up like this?
Some of the reasons why there is such a gap?
Very simple, in general, tightly next to each other, is an empty box; leave a seam stacked, is a heavy box.
Consolidate again
1, row (row)
? ? ? ? There are two ways of representation:
(1) Arranged in natural number order from bow to stern, and numbered 01,02,03... It is indicated by the number 01,02,03.... (2) From the bow to the stern of the ship in the order of the natural number of odd or even. For a 20ft container, the odd numbers 01,03,05,07... are used. Indicate.
When loading 40ft containers, use the even numbering sequence 02,06,10,14.... It is indicated.
2、Column number
? ? ? ? There are two ways to indicate:
(1) In natural number order from starboard to port, with the numbers 01,02,03... Indicated.
(2) In odd or even order to starboard or port, respectively, based on the centre longitudinal section.
When the total number of columns is odd, the column number of the box at the head and tail lines is 00, the column number of the starboard box is 01,03,05,07..., and the column number of the port box is 01,02,03.... The column numbers of the port compartment are 02,04,06,08....
When the total number of columns is even, and there are no compartments on the leading and trailing lines, the columns of the starboard or port compartments are numbered as above, with the numbers 01,03,05,07... Or 02,04,06,08.
3, layer number
There are two ways to indicate: sub-cabin layer number and deck layer number (1) method 1: the cabin layer number to the cabin of the lowest layer as the basis, from the bottom up with the sequence of numbers H1,H2,H3... Indicates. Deck layer number to the deck as the basis, from the bottom up with the sequence number D1,D2,D3.... Indicated. (2) Method 2:
The cabin layer number is based on the lowest layer of the cabin, and is indicated by the sequential numbers 02,04,06... from the bottom up. Indicates.
Deck layer number is based on the deck, and it is customary to use numbers 80, 82, 84... in order from the bottom up. Indicates.
