Steel pipe pile cutting--construction plan for steel pipe pile underwater cutting company-华强电子网

Steel pipe pile cutting--Steel pipe pile underwater cutting company construction program service hotline; 151-8920-8188

The underwater operations mainly engaged in Jiangsu Deep Wave are:

Underwater concrete cutting, pier underwater cutting, steel pipe underwater cutting, steel sheet underwater cutting, pipeline underwater cutting, wreck underwater cutting, gate underwater cutting, steel casing underwater cutting, bridge pile underwater cutting , underwater cap cutting, underwater welding, cement pile underwater cutting

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Underwater work

Cheng.

Steel pipe pile cutting--the construction plan of steel pipe pile underwater cutting company;

First, the project overview:
The steel bridge foundation adopts 480 D3.2-D2.8 variable-section steel pipe piles, plum-type layout and end-end pile design, the pile bottom height is -60.0m, and the platform is dumbbell type size 80.5*35.0m thick 9.0 m, the top of the pile is buried in the cap 20cm, the steel pipe pile is made of Q345c, the inner diameter is 1.0m, the wall thickness is 12mm, and now the 480 steel pipe pile bridge deck is cut underwater according to the requirements of Party A.

Second, the basis for preparation:
(1) [Port Engineering Pile Foundation Specification] JTj254-98
(2) [Steel structure engineering construction and acceptance specifications] GB20205

three,

Steel pipe pile underwater cutting company

step:

 1; 
 Steel pipe pile underwater cutting 
 Preparation work 
 (1); Build a mast with a lifting force of 2.5T on the work platform to stabilize the cut position and prevent the sudden drop of the cut part, so as not to cause damage to the diver. 
 (2); According to the research to determine the location of the cutting, first carry out the rust removal and dredging work of the underwater cutting position, and improve the efficiency of underwater cutting. 
 (3); underwater dredging using a high-pressure water gun from the diver to the cutting site, the working pressure of the water gun is 10-15kg, using the high-pressure water gun fired by the high-pressure water gun to wash the mud, forming a certain dense mud sediment bottom, and then using the suction device The mud is removed 10 meters away from the shipwreck. So that the mud will not continue to settle on the shipwreck. 

 four, 
 Steel pipe pile underwater cutting company 
 Specific implementation: 

 (1); 
 Steel pipe pile underwater cutting method 
 : Determined according to the site conditions and underwater environment: It is decided to adopt a safe and reliable cutting efficiency with high cutting efficiency. 
 (2); 
 Steel pipe pile underwater cutting 
 Equipment requirements: DC arc welding machine, the welding machine capacity should be ≥400A, to ensure reliable ground connection, the formation of cutting circuit should be reasonable 
 (3); 
 Underwater cutting operation of steel pipe pile 
 . Due to the underwater working environment, it is a suspended position. If the direct cutting will cause great danger to the diver in the suspended state, the cutting efficiency is also low. Therefore, the diver should first stabilize the body and make a hanging basket for the diver. Operate in the gondola. After divers dive to the cutting point, they are in parallel with the secant line. Before the cutting starts, the air supply pipe, signal rope, oxygen pipe and cutting cable equipment should be arranged first. Care should be taken not to place them on the slag flowing line to avoid being burned out. When cutting underwater, in order to prevent the wrecked shipwreck plate from injuring the diver, it should be suspended by the mast of the platform on the shipwreck plate to be cut before cutting. Then cut and do not cut the shipwreck plate completely while cutting. A little uncut metal should be left at the edge to ensure that it does not move freely before lifting. After the diver has cut the equipment well and evacuated from the water surface, or after hiding in other safe places, start the lifting force and pull off a small part of the metal left and lift it out of the water. 

 Fives, 
 Steel pipe pile underwater cutting 
 Main construction equipment and equipment: 
 1. 2 sets of diving equipment 
 2, high pressure water gun 1 
 3. One DC arc welding machine 
 4, 1 set of underwater cutting equipment 
 5, 1 set of underwater suction machine 
 6, 1.5T hoist 1 (available from Party A) 
 7. One mast (available from Party A) 
 8. A set of two-wheeled pulleys (provided by Party A) 
 A set of 9, 50 kW lines (provided by Party A) 

 six, 
 Steel pipe pile underwater cutting 
 Staff organization: 
 1. 1 person in charge of the construction project 
 2. One person in charge of technology 
 3. 1 security officer 
 4. 2 diving captains 
 5, 10 divers 
 6, 2 heavy lifting workers 
 Seven, 
 Steel pipe pile underwater cutting project 
 Schedule The construction time of the project is 20 days. 
 Eight, 
 Safety measures for underwater cutting operation of steel pipe piles 
 : 
 1. Diving construction operations must be carried out in accordance with the regulations of the People's Republic of China Diving Regulations. 
 2. Diving construction operations must follow the principle of safety first, prevention first, strict organization, and management according to law to ensure the safety of the diving personnel. 
 3, the equipment is regularly inspected, in line with safety performance before operation. 
 4. The electrical insulation related to the underwater operation of the diver must meet the relevant provisions of GB16636. 
 5. The diving team implements the post responsibility system, and each work must be filled in <working diary> 
 6. When two groups of diving workers are working on the same working surface at the same time, they should check the signal rope and the air supply pipe at any time to prevent entanglement. 
 7. Strictly control the diver's diving time and operation cycle to ensure that the diver can get enough rest. 
 8. Establish a network of security assurance organizations, set up full-time security officers and team leaders, and take responsibility at the security level. 
 9, do a good job in safety technology, everyone sign in 
 10. Dive operations strictly follow the diving operation procedures. 

 11. Strictly abide by the safe operation rules, civilized construction, and hang warning signs to create a strong safety atmosphere. 

Steel pipe pile underwater cutting contact; Zhu manager