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• Time of issue:2020-09-22 13:15
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(Summary description)The pipe jacking construction of Jiangsu pipe jacking machine can be divided into the following types: 1. Generally, there are several methods for pipe jacking construction of Jiangsu pipe jacking machine, static pressure type pipe jacking, that is, simply use the feed cylinder to push and pull the casing. 2. Hydraulic sprint static water pipe jacking, that is, high pressure hydraulic sprint breaks the soil, pushes the cylinder liner, and the amount of slag outer pipe is small. 3. Spiral pipe jacking is a teaching method that uses an auger to analyze and construct. When constructing, first prepare for jacking into the pit, install the spiral circulation drilling rig in the pit at a working level, and then use the research screw to transmit the drilling pressure and torque. Push the head of the pipe jacking machine forward. Use the top pipe section forward cylinder drill, head down from the soil excavated pit to the drill rod through the screw. The jacking distance of this method is relatively short, and it can only be used in the straight section. Generally, the jacking distance is within 60m. Its advantages are no vibration during construction, low noise, light weight, simple and convenient operation, few construction management personnel, and small foundation pit. When the pipe is 2m long, a 3.6m long and 1.5m wide jack can be used. 4. Rotary pipe jacking. Use a drill bit to cut the soil layer, follow up with the casing simultaneously, and discharge the slag in the pipeline. It can be divided into two types: rhinestone and no rhinestone, casing rotating and non-rotating. In the pipe jacking construction technology, jacking force is an important basis for selecting the construction method, determining the back wall reinforcement plan and determining the construction schedule. According to construction practice, the maximum static pressure of the head pipe requires the minimum resistance to the maximum force at the top, followed by hydrostatic pressure, to rotate. Generally, there are several methods of pipe jacking construction in Jiangsu. The rotary construction method has the highest requirements for the development of machinery and tools, and the static pressure type pipe jacking has the simplest requirements for the machinery and tools. For the selection of the jacking pipe, the appropriate construction method and the required jacking capacity of the lifting equipment should be selected. Widely used to promote production.