Long distance pipe jacking construction method for urban underground pipe gallery
An underground pipe gallery and construction method technology, applied in chemical instruments and methods, artificial islands, water conservancy projects, etc., can solve the problems of unreasonable thixotropic mud formula, insufficient performance, low mixing efficiency, etc. Good control, lubrication and drag reduction effect and high use efficiency
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[0033] Example: as attached figure 1 , 2 , 3, 4, 5 and attached Figure 6 As shown, the long-distance pipe jacking construction method of the urban underground pipe gallery includes three steps in sequence: excavating a working pit, installing jacking equipment, and pipe jacking. In the pipe jacking step, thixotropic mud is injected outside the pipe wall, The composition of the thixotropic mud includes bentonite, sodium carboxymethylcellulose, sodium carbonate, iron sulfate, gypsum, polyacrylamide and water.
[0034] In this embodiment, the bentonite and water are the main raw materials of the thixotropic mud, and the sodium carboxymethyl cellulose, sodium carbonate, iron sulfate, gypsum and polyacrylamide can greatly improve the mud The thixotropy ensures that the two functions of pipe jacking drag reduction and pipe wall protection can be performed efficiently.
[0035] The composition of the thixotropic mud includes 100-200 parts of bentonite, 5-6 parts of sodium carboxy...
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