Foundation treatment method for controlling post-construction settlement and deformation of soft soil
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A foundation treatment and soft soil technology, applied in soil protection, infrastructure engineering, construction, etc., can solve problems that may not be met
Inactive Publication Date: 2011-10-26
CCCC FOURTH HARBOR ENG INST +4
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Therefore, this patent is often used as a supplementary measure for the foundations that have been treated, and there are certain limitations. For some foundations that have been treated, this method may not be able to meet the settlement standards under the use requirements.
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Embodiment 1
[0034] Embodiment 1 is the method for adopting well point dewatering to strengthen the foundation to control post-construction settlement, and its construction steps are as follows:
[0035] (1) Insert a vertical sealing film 3 around the area to be reinforced, and set up a sealing wall;
[0036] (2) Insert plastic drainage boards 6 at certain intervals in the weak soil layer 4 in the area to be reinforced;
[0037] (3) Lay the drainage sand cushion 7, and bury gravel blind ditches in the sand cushion according to the length and width of 30-50m;
[0038] (4) Set precipitation well point 8 at the intersection of blind ditch;
[0039] (5) Lay old clay, geotextile and sealing film 2 on the drainage sand cushion layer 7, and the sealing film extends into the surrounding sealing wall with a depth of not less than 1m.
[0040] (6) Backfill the subsidence and fill the soil or apply preload, which can simultaneously use the walking load of the road construction vehicles during the c...
Embodiment 2
[0044] Embodiment 2 is the method for adopting vacuum pumping to strengthen the foundation to control post-construction settlement, and its construction steps are as follows:
[0045] (1) Insert a vertical sealing film 3 around the area to be reinforced;
[0046] (2) Insert plastic drainage boards 6 at certain intervals in the weak soil layer 4 in the area to be reinforced;
[0047] (3) Lay the horizontal drainage pipeline 10, and the head of the plastic drainage board 6 is directly connected with the horizontal drainage pipeline 10;
[0048] (4) Horizontal drainage pipeline 10 is connected with vacuum equipment 11 with bellows 12;
[0049] (5) Laying old clay or sealing film 2 on the foundation surface;
[0050] (6) Backfill the subsidence and fill the soil or apply preload, which can simultaneously use the walking load of the road construction vehicles during the construction period;
[0051] (7), run the vacuuming equipment 11 to carry out vacuuming, strengthen the found...
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Abstract
The invention discloses a foundation treatment method for controlling the post-construction settlement and deformation of soft soil. the method sequentially comprises the following steps: setting a vertical envelope wall around an area to be reinforced; inserting vertical drainage systems and laying horizontal drainage systems in the area to be reinforced; paving sealing materials on the surface of a foundation; backfilling settlement refills or exerting pre-loads on the foundation; carrying out vacuumizing, well-point dewatering or vacuum well-point dewatering on the drainage systems so as to reinforce the foundation; and after the consolidation degree of the foundation reaches 60-90%, carrying out sealing on all the vertical and horizontal drainage systems. The method disclosed by the invention is used for simultaneously carrying out reinforcement and plugging on an untreated soft soil foundation, so that the post-construction settlement can be controlled while the foundation is treated. Duo to the one-time treatment, the treatment time can be saved, and the treatment cost can be reduced, thereby achieving the purpose of effectively reinforcing the foundation and controlling the post-construction settlement.
Description
technical field [0001] The invention relates to the technical field of soft soil foundation treatment such as port engineering, traffic engineering, and construction engineering. Background technique [0002] Our country is in the climax of infrastructure construction, and a large number of soft soil foundation treatment problems have been encountered in engineering construction. For a long time, the settlement of the treated soft soil foundation, especially the post-construction settlement, and the large difference in settlement often lead to problems such as building cracks, uneven settlement, or excessive post-construction settlement that seriously affects the use function, causing huge economic losses. . [0003] In order to solve the post-construction settlement problem, the commonly used soft foundation treatment methods include cushion replacement method, cement-soil mixing method, high-pressure jet grouting method, drainage consolidation method, cement fly ash grave...
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