Horizontal water discharge board vibation pression treatment method for water power blowing filling foundation
A technology of horizontal drainage board and treatment method, which is applied in the direction of soil protection, infrastructure engineering, construction, etc., can solve the problems of long ballasting time, long construction period, poor reinforcement effect, etc., and achieves simple construction, low price, The effect of saving processing time
Inactive Publication Date: 2002-07-17
NANJING HYDRAULIC RES INST THE MINISTRY OF WATER RESOURCES THE MINIST
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However, this method needs to pile up a lot of earth, and the ballasting time is very long, usually 6 months to 1 year
The common deficiencies of the above methods are: (1) foundation treatment can only be carried out after the dredging and filling is completed; (2) special machinery should be used for construction; (3) a long construction period is required
However, a round hole must be opened under the vibrating plate, and its area is 25% of the total area of the bottom plate, so that the super static pore water pressure in the soil under the vibrating plate that hinders compaction can be greatly reduced, otherwise the reinforcement effect will not be good
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Embodiment 1
[0009] Example 1, a 450,000-kilowatt power plant needs to be filled to form a site of 90 hectares, and 24 hectares of it are to be treated with foundation. Sand does not liquefy. During the dredging construction process, the horizontal drainage board vibratory rolling method is used to form the hydraulic dredging foundation. Refer to Figure 1 ~ Figure 3 : The first soil layer to be filled is 1, and then a layer of horizontally placed plastic drainage boards 2 is laid, and the distance between each drainage board is 1.5m. After filling another soil layer 3, carry out vibratory rolling treatment, repeat blow filling, lay drainage boards, blow fill again, and roll until the end. figure 1 Among them, 3 is the soil layer being rolled; 4 is the multi-level sub-weir, and 5 is the original ground. In the original bidding document of this example, it was suggested to adopt the vibrating gravel pile method with a pile length of 8-15m, a total length of 14.6m, and a cost of up to 3.78...
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The horizontal drainage plate vibration rolling treatment method for hydraulic blow-filling ground base includes the following steps: filling a layer of soil, laying a layer of horizontally-arranged plastic drainage plate, drefilling a layer of soil to make vibration rolling, repeatedly said uperation until the soil-filling is completed. Its key technical lies in that the original vertically-used drainage plate is changed into horizontally-arranged drainage plate to form transverse drainge channel so as to attain the goal of reducing porosity ratio, discharging water smoothly and compacting soil body to raise ground base quality.
Description
technical field [0001] The invention relates to a horizontal drainage board vibration rolling treatment method for hydraulic dredging foundation or filling foundation. Background technique [0002] At present, vibrating piles, sand piles and dynamic compaction are mostly used for the treatment of dredged sand, and the price is relatively high. When dealing with large-area foundations, in order to reduce costs, there are also explosive compaction methods abroad to treat saturated loose non-cohesive soils, and deep vibration compaction methods (vibrating rods with vibrating wings) to reinforce sandy soils. The vertical drainage board preloading method is often used in dredging soft soil. It first presses the permeable drainage board vertically into the soft soil with a slotting machine, and then piles soil on the surface as ballast to squeeze out the water in the soil and drain it away. , so that the pores of the soft soil are reduced, the strength is improved, and the post-c...
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IPC IPC(8): E02D3/046E02D3/10
Inventor 何开胜沈珠江张广旗黄保东
Owner NANJING HYDRAULIC RES INST THE MINISTRY OF WATER RESOURCES THE MINIST