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Novel ceramsite backfilling method

A new type of ceramsite technology, applied in soil protection, on-site foundation soil survey, construction, etc., can solve the problems of inability to compact ceramsite and meet the requirements of ceramsite backfill, etc., and achieve good compaction effect

Inactive Publication Date: 2021-02-19
THE SECOND CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to large ceramsite particles, low density and light weight, traditional large-scale machinery is easy to damage the internal structure of ceramsite due to uneven load during backfill construction. If small machinery is used, ceramsite cannot be compacted
However, the traditional detection method for the compactness of the backfill layer cannot meet the requirements of ceramsite backfill.

Method used

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] The present invention will be described below in conjunction with the backfilling of the ceramsite layer in the molten salt cold tank of the 950MW photothermal photovoltaic hybrid power station in Dubai. The foundation radius of molten salt cold tank of Dubai 950MW photothermal photovoltaic hybrid power station is 22.5m, and the inside is graded sand and ceramsite from bottom to top (thickness is 1.5m, area is about 1600m 2 ), gravel layer.

[0014] The particle size of the ceramsite used in the present invention is not more than 20mm, and the density is 340kg / m 3 , The compression rate of the ceramsite soil layer is 13%-17%. In order to achieve the required compressibility, the compaction of the ceramsite soil layer requires a lot of time and human and mechanical input. If the compression rate is too large, such as greater than 17%, ...

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Abstract

The invention discloses a novel ceramsite soil backfilling method. According to the novel ceramsite soil backfilling method, a layered backfilling mode is adopted for ceramsite soil backfilling, and the thickness of each layer of compacted ceramsite soil is not larger than 200 mm; the compression ratio of each layer of ceramsite soil is 13%-17%, and the compressive bearing capacity is smaller than50 KN / m<2>; when each layer of ceramsite soil is compacted, closely-arranged steel plates are pre-laid on the ceramsite soil, rolling compaction is conducted through rolling compaction equipment, andeach layer needs to be continuously rolled and compacted for 1.5 days or longer; the dynamic deformation modulus of each layer of compacted ceramsite soil is not less than 14 MPa; and deformation modulus values Ev1 and Ev2 of the first loading and the second loading of a static flat plate load meet the condition that Ev2 / Ev1 is smaller than or equal to 2.2, and Ev1 is larger than or equal to 40 MPa.

Description

technical field [0001] The invention belongs to the technical field of molten salt tank construction, and in particular relates to a novel ceramsite backfilling method. Background technique [0002] The molten salt storage tank is an important part of the solar thermal power plant. During the power generation operation, the molten salt will be heated to 600°C and stored in the tank. The backfill material must be able to withstand high temperature and heat preservation while bearing the load of the upper structure. Ceramsite has the characteristics of light weight, thermal insulation, and good acid resistance, and is often used as a material for thermal insulation and backfill. However, due to large ceramsite particles, low density, and light weight, traditional large-scale machinery is easy to damage the internal structure of ceramsite due to uneven load during backfill construction. Small-scale machinery cannot compact ceramsite. However, the traditional detection method f...

Claims

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Application Information

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IPC IPC(8): E02D27/38E02D27/28E02D3/046E02D1/08
CPCE02D1/08E02D3/046E02D27/28E02D27/38
Inventor 缪勇张锋凌陈杨化余青松吴春元冯子恒陈维虎
Owner THE SECOND CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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