Strengthening method of ultra-soft ground shallow lamination strengthening system
A foundation, ultra-soft technology, applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as inconvenience for large-area construction, rapid attenuation of vacuum along the depth, easy detachment of pipe joints, etc., to shorten the foundation. Treatment time, good foundation reinforcement effect, and the effect of reducing waiting time
Inactive Publication Date: 2011-08-10
曾国海
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Problems solved by technology
[0004] (1) The moisture content of the dredger fill is above 150%, which is in a flowing state, and personnel and machinery cannot directly construct on the ground, and construction personnel are prone to safety hazards such as casualties after being trapped;
[0005] (2) There is a lack of sand sources, and sand loading operations cannot be carried out;
[0006] (3) The method of using PVC round pipes as the main pipe and the branch pipe is very time-consuming and labor-intensive, which is not convenient for large-scale construction. disengage;
[0007] (4) Vacuum pressure transmission is prone to blind spots, the vacuum degree decays quickly along the depth, and the processing time is long
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[0022] like figure 1 , figure 2 , image 3 and Figure 4 Shown:
[0023] Firstly, a mud floating construction channel is set up on the mud foundation, so that construction can be carried out immediately after the newly dredged muddy soil area is dredged and filled, which reduces the time for natural consolidation to form a hard shell; Compression and pre-compression drainage structure system; finally, set the lower vacuum drainage structure system.
[0024] A double-layer drainage structure is formed, and the method of vacuumizing multiple drainage channels separately can quickly transfer the vacuum degree to different depths of the foundation soil to ensure the smooth flow of the horizontal and vertical drainage systems, so that the surface layer of the foundation soil and the deep foundation can be quickly consolidated at the same time. The purpose of shortening the preloading consolidation time, thereby reducing the construction period and construction cost.
[0025] ...
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The invention relates to a strengthening method of an ultra-soft ground shallow lamination strengthening system, which is applied to freshly filled mucky soil. The strengthening method comprises the following steps of: arranging a floating construction passageway on the ultra-soft ground, laying a passageway pressure plate, striking a reinforcing steel bar into the ground and matching an upper negative pressure pre-pressing drain device with a lower vacuum drain device; sequentially arranging an upper geotextile and a sealing file on the negative pressure pre-pressing main pipe, and arranginga lower geotextile under the negative pressure pre-pressing main pipe, and connecting the vacuum drain main pipe to the vacuum drain branch pipe. The invention solves the problems that the vacuum pre-pressing technology wastes time and energy, has transferring blind spots and rapidly weakens the vacuum degree along the depth. In the invention, on the basis of forming the pre-pressing load on the soil by utilizing the vacuum pre-press, the lower vacuum drain device is matched with the upper negative pre-pressing drain device, and the vacuum degree is directly transferred to the preset depth soas to speed up the drain consolidation of the ground soil. The invention strengthens the surface silt ground and the deep silt ground at the same time, shortens the construction time and reduces the cost.
Description
technical field [0001] The invention relates to a large-area soft ground treatment device and process, in particular to a super-soft ground superficial layer reinforcement system reinforcement method suitable for newly dredged muddy soil. Background technique [0002] At present, with the rapid development of coastal areas, land reclamation using tidal flats and dredging is an important measure to solve the shortage of industrial land. However, since the new dredging and filling are generally muddy soil with "three highs and one low" (i.e. high water content, high compressibility, high sensitivity, and low strength), the site has high water content and low strength after the completion of dredging and filling. Personnel cannot enter. In this regard, the usual method is natural consolidation for 1-2 years, and after a 20cm-thick "hard shell" is formed on the surface, bamboo rafts, geogrids and other materials are laid before personnel can enter the construction. This method...
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IPC IPC(8): E02D3/10
Inventor 曾国海叶吉李燕青
Owner 曾国海