Vacuum preloading consolidation method for duplex vacuum tube well of blowing filling soft soil
A vacuum tube well and vacuum tube technology, applied in soil protection, construction, infrastructure engineering, etc., can solve the problems of insignificant reinforcement effect, low transmission efficiency, and difficult drainage, etc., to achieve improved reinforcement effect, easier drainage, and improved transmission efficiency Effect
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[0037] Example 1
[0038] Reference figure 1 with figure 2 , A method for vacuum preloading reinforcement of a compound vacuum tube well with soft soil filling, using a compound vacuum tube well. The compound vacuum tube well includes an inner tube 7, an outer tube 4, and a filter membrane 2. The lower end of the outer tube 4 is closed. The upper end of the outer tube 4 is provided with a sealing head, the inner tube passes through the sealing head and extends into the bottom of the inner cavity of the outer tube. The middle and lower outer wall of the outer tube is sleeved with the filter membrane, and the outer tube wall where the filter membrane is located is provided with water permeable holes; the inner tube is directly connected to the vacuum system, the water in the outer tube is pumped away and a negative pressure is generated in the outer tube , In the initial stage of reinforcement, the vacuum pump is turned on intermittently to reduce the water content of the dredger ...
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[0046] Example 2
[0047] Reference image 3 with Figure 4 In this embodiment, the sludge is blown and filled first, and then the vacuum equipment is set up. At this time adopt figure 2 The designed soft compound vacuum tube well, the outer tube 4 is a corrugated filter tube with a diameter of 5 cm, and the inner tube 7 is a spring plastic hose with a diameter of 2 cm or a vacuumable plastic hose. See the layout diagram Figure 4 , The main implementation technical steps are as follows:
[0048] (1) Build the cofferdam first, and then blow-fill the soft soil in the cofferdam. After the weight of the blow-filled soft soil has settled to a certain level, a compound vacuum corrugated filter tube is installed.
[0049] (2) Connect the vacuum hose of the double vacuum corrugated filter tube to the vacuum system.
[0050] (3) Complete the laying of geotextile and sealing mold.
[0051] (4). The vacuum pump is turned on intermittently before vacuuming. The main purpose is to pump the wat...
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