A micp-based bucket foundation reinforcement device and installation method for coral sand formations
A barrel-shaped foundation and reinforcement device technology, which is applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as pollution, and achieve the effect of increasing cementation, bearing capacity and stability
Active Publication Date: 2019-06-14
ZHEJIANG UNIV
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Problems solved by technology
[0005] Aiming at the serious environmental problems existing in the existing grouting technology, the present invention proposes a MICP-based bucket foundation reinforcement device and technology for coral sand formations. This technology overcomes the pollution problem of the original grouting technology and can quickly It is coral sand cemented into rock, which can effectively improve the bearing capacity of the formation
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[0021] refer to Figure 1-4 , the barrel-shaped foundation 1 is a suction barrel-shaped foundation with a length-to-diameter ratio of 1:2. There is a cross-shaped partition 2 inside to strengthen the overall strength and rigidity of the structure. The partition 2 divides the barrel-shaped foundation into four partitions. The roof of each compartment has two water pumping holes 3 (also top grouting holes) at 1 / 2 of the radius, and the angle included between the two drain holes 3 and the center line of the top plate is 45 degrees. The grouting main pipe 4 is connected from the construction ship to the center of the top of the foundation, and is connected to the joints 6 of the eight grouting steel pipes 5. The eight grouting steel pipes 5 are arranged in a "meter" shape, and each grouting steel pipe 5 is connected to one The water pumping hole 3 (top grouting hole) is then connected to the outer wall of the bucket through the one-way valve 7 and extends downwards along the outer...
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The invention discloses a coral sand stratum barrel-shaped foundation reinforcing device based on MICP and a mounting method. The device comprises a barrel-shaped foundation, a water pumping hole, a grouting master pipe, a grouting steel pipe, a one-way valve, a backflow pipe and the like. A draining hole connected with the grouting steel pipe is formed in a barrel-shaped foundation top plate, thegrouting steel pipe is arranged to be like a Chinese character mi, and grouting holes are formed in the grouting steel pipe along the outer side wall of the foundation at equal intervals. The backflow pipe is arranged on the exterior of the foundation and used for recovering and circulating of slurry. According to the coral sand stratum barrel-shaped foundation reinforcing device based on the MICP and the mounting method, through a microbial rock forming effect, a coral sand stratum is reinforced, the cementation effect between gravel as well as between the gravel and a structure object can be effectively improved, and the bearing capacity and the stability of the foundation are improved; and the MICP technology has no bag influence on the environment and ecology and is an environment-friendly technology suitable for coral sand stratum reinforcement.
Description
technical field [0001] The invention relates to a biological grouting device, in particular to an MICP technology-based reinforcement device and installation method for a bucket-type foundation of a coral sand formation. Background technique [0002] In recent years, the country has vigorously promoted the construction of islands and reefs in the South China Sea, and more and more offshore structures are under planning and construction. However, because the islands and reefs in the South China Sea are mainly coral reefs formed due to biogenesis, the lower part is relatively hard biological reef limestone. The upper part is coral sand and coral breccia with relatively shallow overburden and strong activity, which are very likely to move and migrate under the action of wind, wave and current, which will have an adverse impact on the foundation in this formation. [0003] For foundation and foundation reinforcement, there are mainly cement grouting cementation technology at pre...
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IPC IPC(8): E02D27/22E02D3/12
CPCE02D3/12E02D27/22E02D2250/003E02D2250/0061
Inventor 国振芮圣洁周文杰王立忠
Owner ZHEJIANG UNIV