Shen Huan said loudly: "I don't know much about the design of the wharf, but I also understand some, I want to make a suggestion, that is, now we have applied finite element software to the calculation of ship process design, and now the finite element software has evolved very well, I think in the design of this wharf, you can also introduce finite element software, establish a three-dimensional space finite element model, to calculate, so that the force calculation of the wharf structure is more in line with the actual situation, such as under the maximum load, The horizontal displacement and settlement of the pile abutment, so that the structural safety of the terminal can be guaranteed to the maximum. ” Zhang Xinghua said with a smile: "Assistant Shen's suggestion is very good, we are also seriously studying, it's time to introduce digital design methods, we also have to keep up with the trend of the times, the old methods in the past are indeed going to be changed." ” At this time, Duan Yongfu stood up and said: "Leaders and experts, I personally suggest that in terms of the design and layout of the pile foundation of this wharf, consider the use of large-diameter PHC pipe piles as much as possible, so as to reduce the number of pile foundations, reduce the construction risk, and shorten the construction period of the pile foundation."
At present, there are two types of high pile wharf, and one adopts steel pipe pile foundation, but its disadvantages are obvious, the amount of steel is large, the cost of hydraulic buildings is high, and the use of large-diameter PHC pipe pile is the best. ” Zhang Xinghua hurriedly said: "This suggestion is very good, we will consider it seriously."
But I want to ask, how big is the largest PHC pipe pile that you can provide?
” Duan Yongfu smiled and said: "We can provide ultra-long PHC pipe piles with a diameter of 1,200 mm, of course, if the customer has a demand, 1,400 mm is not a problem." ” Zhang Xinghua said with a smile: "Okay, then I can rest assured, so that we can also rest assured that the bold use of large-diameter pipe piles, after all, the cost of pile foundation engineering accounts for nearly half of the cost of the wharf project, if you can use large-diameter PHC pipe piles, save the cost of the project, and ensure the safety of the wharf structure, it is indeed a double win."
We will have a detailed discussion with your company in the future. ” In fact, in the wharf project with thick silt in Changxing Island, it is indeed necessary to use ultra-large diameter PHC pipe piles to control the settlement of the wharf, not only the diameter of the pipe piles should be large, but also super long.
Of course, this has very high requirements for the production quality of PHC pipe piles and the construction of pile sinking.
And according to the specifications of the wharf project, the joint of the pile structure should not be more than one, so the pile body of the standard single PHC pipe pile is also very long, which has high requirements for the production process and lifting, as well as the pile driver.
At this demonstration meeting, the experts also put forward a lot of suggestions, which also made full preparations for the design and construction of the building materials wharf.
One month later, the design work of the building materials terminal was completed, and it was finally decided to use the 1,200 mm diameter ultra-large diameter PHC pipe pile provided by China Shipping Third Harbor Linhai Concrete Company.
To this end, the production technology system of Linhai Concrete Company is also under the leadership of Chief Engineer Duan Yongfu, and the preparation of the production technology scheme of the super-large diameter PHC pipe pile has been carried out.
You must know that the diameter of the general large-diameter pipe pile is only 1,000 millimeters, but this time it reached 1,200 millimeters.
Although the concrete company of China Shipping Third Harbor Bureau introduced the production technology of the foot basin country in 87 years, it already had the specification of 1,200 mm in diameter, but the length of a single section at that time was only 15 meters, and now because there is only one joint requirement of the pile body, the length of the single pile is required to reach 30 meters.
However, fortunately, in 1999, the Linhai Concrete Company of China Shipping Third Harbor Bureau has successfully developed a 30-meter length of ultra-large diameter PHC pipe pile, but now it is also necessary to attach great importance to it, after all, this is a national key project, and it is a joint venture between the Third Harbor Bureau and Roche Enterprise to use the wharf for its own use.
In the Technology Innovation Center of the Engineering Research Institute of China Shipbuilding Industry Group, the rapid sand mold additive manufacturing technology developed by Dr.
Huang Li was also a complete success.
This technology has passed the review of relevant experts and has received unanimous praise.
At the same time, Shen Huan and Dr.
Huang Li have also begun to co-write a paper on the application and prospects of additive manufacturing technology in the shipbuilding industry, which is ready to attract the attention of more experts at the China Shipbuilding Industry Development Forum in September.
In August, the first phase of the building materials wharf project bidding meeting of CSSC Jiangnan Changxing Shipbuilding Base also came to an end, and the winning bid was the China Shipping Third Harbor Bureau, which is very interesting, the main user of the wharf after the completion of the Third Harbor Bureau, and the construction party is also the Third Harbor Bureau, and the supplier of PHC pipe piles is also the Third Harbor Bureau.
However, in terms of the construction of the wharf, China Shipping Third Harbor Bureau does have very strong strength and considerable experience, and it would be strange if it did not win the bid.
The construction period is also quite tight, only four months, which means that the wharf must be completed at the end of 2003, because the concrete batching plant dedicated to CSSC Jiangnan Changxing Shipbuilding Base will start construction after the wharf is completed and put into use.
This concrete batching plant is also an important guarantee for the construction of CSSC Jiangnan Changxing Shipbuilding Base, after all, the use of millions of square meters of concrete, in just two or three years, each year will reach about one million square meters, and the peak must be more than that.
The shareholders of the two concrete companies of China Shipping Third Harbor Bureau and Roche Enterprise attach great importance to it and have begun preparations for the construction of the station at this time.
According to the basic requirements put forward by CSSC Changxing Construction and Development Co., Ltd. and CSSC Ninth Institute, this concrete batching plant is designed with five production lines, including three HZS180 production lines and two HZS120 production lines, a total of five production lines, the theoretical concrete hourly output can reach more than 700 square meters, but the theoretical output is generally unattainable, and the actual production capacity can reach 350 square meters to 400 square meters per hour.
In this way, the maximum daily production capacity is nearly 10,000 cubic meters, which can basically meet the peak demand for concrete.
Of course, it is not enough to have a production line, and the storage of supporting raw materials must also be enough, especially here is located at the mouth of the Yangtze River, and also take into account the impact of typhoon weather, under extreme climatic conditions, it may not be possible to come to raw materials for half a month or even a month, so in order not to affect the construction of the base, the storage capacity of raw materials of this concrete batching plant is very high.
To do this, it is necessary to design a huge sand and gravel yard with several huge cementitious material storage tanks, not to mention admixture storage tanks, all of which must be larger.
The area of the entire concrete batching plant is planned to be as large as the excavated port basin of Line 3, with a length of 800 meters and a width of 200 meters, covering an area of 160,000 square meters, totaling 240 acres.
And it just so happens that the location of the concrete batching plant is next to the port pool of Line 3.