Sprayed concrete for underground water-seal oil depot
A technology of shotcrete and groundwater, which is applied in underground chambers, earthwork drilling, shaft equipment, etc., can solve the problems of restricting shotcrete and poor impermeability of shotcrete, reduce the strength loss in the later period, realize high performance, The effect of improving impermeability
Active Publication Date: 2015-03-25
WUHAN UNIV +1
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Problems solved by technology
At the same time, the poor impermeability of shotcrete also greatly limits the application of shotcrete in underground engineering.
Method used
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[0014] The present invention will be further described below in combination with specific embodiments.
[0015] Table 1 shows the effect of the amount of non-alkali quick-setting agent being 4%, 6% and 8% of the cement mass on the setting time of cement paste. It can be seen from the table that when the amount of non-alkali quick-setting agent is 6% , 8%, the setting time of cement slurry is greatly shortened.
[0016] Table 1 Effect of different accelerator content on the setting time of cement paste
[0017]
[0018] Several groups of wet shotcrete samples were prepared according to the ratio provided in Table 2, and the slump met 14-18cm.
[0019] Table 2 Mix ratio of wet shotcrete
[0020]
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The invention discloses sprayed concrete for an underground water-seal oil depot. The sprayed concrete comprises water, cement, aggregate and an additive, wherein the additive comprises a modified organosilicone waterproof material, an efficient slushing agent, an alkali-free accelerating agent and cellulose ether which respectively account for 0.02 to 0.1%, 0.8 to 1.2%, 6 to 8% and 0.03 to 0.05% of the cement by weight. The sprayed concrete with high anti-permeability performance and high adhesive strength can be applied to the underground water-seal oil depot, and can solve the problem of support damage of the sprayed concrete caused by the lack of adhesive force.
Description
technical field [0001] The invention belongs to the technical field of civil engineering materials, and in particular relates to shotcrete used for underground water-sealed oil depots. Background technique [0002] With the rapid development of our country's economy and the improvement of people's living standards, the consumption of oil has also increased rapidly, and our country is facing an increasingly serious oil crisis. Among the world's major oil-importing countries, China is the only country that has not yet established a strategic oil reserve. Underground water-sealed oil depot is the best form of crude oil or oil storage at present. It has multiple advantages such as good safety, saving investment, suitable for land occupation requirements, small footprint, low maintenance cost, and long service life. The national energy medium and long-term development plan clearly states that large-scale underground crude oil storage will be built in the next few years, with a t...
Claims
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IPC IPC(8): C04B28/00E21D11/10C04B24/42C04B103/65
Inventor 何真荣耀久赵晓蔡新华杨华美张文辉
Owner WUHAN UNIV