Others * Qiongzhou Strait Railway Ferry Nangang Wharf Steel Plate Sinking Construction Pipe Cultural Revolution (Haihai Railway Co., Ltd. Hainan Haikou Sinking Pile Quality Control.
The southern port terminal of the Qiongzhou Strait of the Guangdong Railway Channel uses steel plates as the permanent terminal foundation. The steel plates used are imported from Luxembourg ARBED company, mainly in AZ48 and AZ26 forms. AZ48 is used for ferry terminal, 21m long, a total of 211 groups, and AZ26 is used for maintenance terminal, 19m long, a total of 173 groups.
The penetrating soil layer is mainly medium sand, with the upper part loose and slightly dense, the middle and lower parts saturated, and the medium dense to dense. The standard penetration is 15 to 45 shots. The holding layer is silty clay and clay, saturated, plastic, partially hard plastic, and the standard penetration is 12 to 22 shots. There is a local hard cement layer. The following is a discussion on the process of inserting steel plates into dry land.
1. Selection of sinking equipment 1. Selection of guide frame The steel plate is a slender rod under pressure during the insertion process. Due to the lack of left and right constraints, the steel plate is prone to tilt or trip due to the lack of left and right constraints. The steel plate sinks vertically and must be guided with a guide device. According to the long and thin characteristics of the steel plate on the construction site, it is not enough to use the upper guide rod and 2 channel steels as the lower guide device. Therefore, the left and right truss are used as the guide device for the steel plate. The guide device is 14 meters long and 8 meters high. 2 channel steels are welded to the lower part of the guide frame. The guide device adopts the method of counterweight (12t on each side) and positioning (4 to 6 on each side) to maintain its stability, and it is placed in place by sliding or sliding. Adjust the level of the guide frame with an iron wedge to keep the guide frame vertical.
1.2 Choice of machinery There are diesel hammers, hanging hammers, double-acting hydraulic hammers (water hammers), steam double-acting hammers, vibrating punches, plate presses, etc.
According to the characteristics of Qiongzhou Strait ferry terminal with sandy soil and high groundwater level, it was decided to use ICE44-50 vibrating machine and D70 diesel machine to fight together. The first round of 5m and the second round of sinking 5m were all vibrated. Enter, the third round of 9 ~ 11m is replaced by diesel engine.
Railway Engineering Major.
Comparison of 2 hitting methods Now the commonly used hitting methods are single-chip hitting, row hitting, and stagger hitting.
According to the characteristics of the dense and saturated sea sand of the Nangang Wharf, the final decision was to use the row-type hit. It will be scored 3 times. In the first round, all will be scored at 5m. In the second round, all will be scored at 5m. In the third round, it will reach the design elevation. Before inserting the steel plate, use a hoist to pull the two pieces of Z-shape on the flat ground, and weld them firmly with 4 sections of welds. In addition, when it is very difficult to hit the dense soil layer and the footage is very difficult, it is supplemented by the high-pressure water jet method, but it must be very cautious to avoid reducing the bearing capacity of the foundation.
3 Steel plate pile sinking quality control 31 Control penetration Because the steel plate is a slender rod, it is easy for the steel plate to produce lateral additional force during the driving process, so the penetration of the steel plate must be strictly controlled. Before entering the holding layer, it is better to use 3 ~ 5cm / strike. After entering the holding layer, strictly control it within 1cm / strike.
3.2 Prevent lockout trip One is to weld a steel baffle at the female lock end of the steel plate to prevent mud and sand from entering the lock; second is to fill the lock with dry putty to reduce the friction between the male and female locks, the first male and female locks are filled The dry putty is filled with butter, paraffin, and sawdust. The third is to pass the test with a 2m long steel plate. The resistance cannot exceed 5kN. The lock cannot pass or bend, twist, or bend. , All need to be renovated; the fourth is to use row-type hits to add lateral restraint of the steel plate to prevent tripping.
3.3 Correction of the steel plate When the verticality of the steel plate exceeds the limit, it should be corrected in time. When a small amount exceeds the limit, the method of pulling and jacking can be used to correct the deviation.
3.4 The transverse stiffness of the added steel plate is to strengthen the transverse stiffness of the steel plate, and a steel plate is welded on the steel plate near the belly flange.
Miscellaneous * The working principle of analog quantity control system: First, each detection element in the field inputs the signal and the physical quantity standard signal processed by the transmitter into the field data collection box DGP (DataGatheringPamel), which is also called substation S / S (Substation) , The signal and physical quantity standard parameters are transmitted to the central microprocessor CPU via the transmission channel, processed and stored in the memory, and then the operator can display and print the collected data at any time.
The relevant instructions output after being processed by the central microprocessor CPU are sent to the corresponding DGP on site, and then the DGP controls and adjusts the corresponding executing agencies respectively. The Swiss SauterErl200 system used in the Shenzhen International Trade Building built in the early stage and the Heros 2000 of Beijing China International Trade Center Phase I are all analog control systems.
In recent years, with the development of microcomputer technology, data communication and computer network technology in foreign countries, a large number of equipment in large enterprises and modern buildings require centralized management and distributed distribution, and developed a combination of centralized management and decentralized control. There are two types of distributed control system control systems. ) Generally, it is composed of a central host, external equipment, transmission channels, data collection stations, on-site detection components and executive operating mechanisms. See its system structure.
Building automation appeared abroad in the 1950s and 1960s. Since the mid-1970s, especially after the reform and opening up, building automation systems (BAS) have gradually developed. Building automation systems have been adopted in the early construction of China Hotel in Guangzhou, Huating Hotel in Shanghai, Beijing International Building, Shenzhen International Trade Building, and Beijing China International Trade Center. In recent years, modern high-rise buildings, underground railways, industrial and civil buildings built in China are equipped with a large number of advanced equipment, and the purpose is to provide a three service functions: safe, convenient and comfortable activity environment. Such as automatic fire alarm system (FAS), air conditioning and ventilation system (HVAC), security monitoring (SAS) system, power distribution and emergency power station monitoring system, lighting control system (LCS), water supply and drainage monitoring system, heating station monitoring system , TV broadcast sound system (MATV / C0MM), elevator monitoring system, parking lot automatic monitoring system, etc. These systems have a wide variety of equipment, scattered layout, high functional requirements and complex performance. If they rely on manual monitoring and operation, they will not only cost labor and time, but also can not report the operation status of the equipment and the time and location of the failure in time. To monitor and record in time The operating parameters and status of all equipment must achieve energy saving and optimized operation, which is beyond human reach.
The control method of building automation system usually has traditional analog quantity control system and centralized and decentralized combination of centralized management and decentralized control: Dong Guomin (1941), male, senior engineer, graduated from the Department of Electrical Engineering of Hefei University of Technology in 1965.
Man-machine interface external equipment building automation system introduction A distributed control system Dong Guomin Zeng Qingyi (Railway Professional Design Institute Beijing 100020) has a certain representativeness in the system.
Examination element 4 of the implementing agency: Experiences and suggestions for the construction of the steel plate of the South Port Wharf of the Qiongzhou Strait, using vibratory pile driver for initial settlement, diesel drive for re-settling, row pile driving, truss orientation, and successfully driving the steel plate into the sand layer, construction plan It is feasible. According to the successful experience of the construction site, the following points should be paid attention to when constructing the steel plate in the dry land: (1) The dry plate steel plate is prevented from tripping, and it must be comprehensively considered from the order of playing, the machinery, the sand control of the lock, and the guide equipment; ) Steel plate construction should fully consider that the steel plate is long and thin. Welding stiffening plates should be added to increase the rigidity of the steel plate; (3) Different hitting machines should be selected according to different geological conditions, in line with the principle of economic efficiency; (4) According to Different geological conditions use different hitting sequences; (5) Check the lock before hitting, do necessary treatment when there is a problem, and take appropriate measures to prevent mud and sand; (6) When hitting a long steel plate, except for the conventional settings 1. Outside the lower guide device, a truss should be set as a guide.
Central processor 23 data collection box
Cinnabar also called zinnober. Because the ancient Chenzhou (now Yuanling) produced by called cinnabar. In fact, this does not produce Chenzhou cinnabar, but cinnabar distribution center! Its origin concentrated in Guizhou Tongren, Wan Hill. Mainly used in military industry, scientific instruments, folk also large amounts used in architectural decoration, Buddhism, funeral and other industries. Such as: paint additives, Marine coatings, inkpad, dyes, pigments, painting, calligraphy, decorations, gifts, handicrafts, cosmetics, collection, funeral, buddhist supplies, buddhist scriptures made etc.
Rock Specimens,Cinnabar Specimen,Mineral Specimen,Natural Rocks Specimen
Xinxiang Vic Science&Education Co.,Ltd. , https://www.hnhumananatomymodel.com