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Static pressure earth-borrowing equipment for testing dry density and quality control method for sand compaction

A dry density and static pressure technology, applied in sampling devices, soil material testing, material inspection products, etc., can solve problems such as low compaction standards, and achieve the effects of convenient operation, shortened detection time, and high measurement accuracy.

Inactive Publication Date: 2016-03-02
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, if the roller is used for layered compaction, the points with a compaction degree greater than 100% are too many, which also indicates that the compaction standard is low

Method used

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  • Static pressure earth-borrowing equipment for testing dry density and quality control method for sand compaction
  • Static pressure earth-borrowing equipment for testing dry density and quality control method for sand compaction
  • Static pressure earth-borrowing equipment for testing dry density and quality control method for sand compaction

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Embodiment Construction

[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0048] see figure 1 The static pressure earth-taking equipment for detecting dry density includes a base 1 fixed in the sand base through a positioning steel needle 12, a main fixed bracket 7 and an active hydraulic cylinder 2 fixedly arranged on the base 1, and the main fixed bracket 7 is fixed with Rigid hydraulic oil pipeline 5 with one end connected to the active hydraulic cylinder 2, the other end of the hydraulic oil pipeline 5 is connected with the feed hydraulic cylinder 6 in the main fixed bracket 7, and the active hydraulic cylinder 2 and the feed hydraulic cylinder 6 are fixed by bolts On the main fixing bracket 7, and the bolt type is M10, the hydraulic oil pipeline 5 is fixed on the main fixing bracket 7 through the pipe clamp, and the balance pressure plate 8 and the return auxiliary pressure plate are arranged in sequence under the feed hydraul...

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Abstract

The invention belongs to the field of soil-borrowing sampling and soil-borrowing devices, and specifically relates to a static pressure soil-borrowing device for detecting dry density and a quality control method of sandy soil compactness. At present, for reflecting the compaction degree of the sand in the engineering, the compaction rate of a sand base is measured by adopting relative density or solid volume fraction; since the operation of the solid volume fraction is tedious, the detection frequency is great in the large-area construction and all measure points are detected by using the solid volume fraction, the workload is huge, and the duration for the project is influenced. The invention provides a new drift-sand subgrade compactness quality control index K which equals to rhod / rhodmax, and the detection time is greatly shortened; meanwhile, the invention further provides a static pressure soil-borrowing device for detecting the dry density by field sampling, wherein the measurement precision is improved and the measurement error is reduced; the device is suitable for large-scale generation and wide application.

Description

technical field [0001] The invention belongs to the field of soil sampling and soil sampling equipment, and in particular relates to a static pressure soil sampling equipment for detecting dry density and a quality control method for sandy soil compaction. Background technique [0002] China is a desert area with a total desert area of ​​63.7×104km2. Because aeolian sand has the characteristics of good water stability, uniform settlement, and little influence from unfavorable seasons, and is widely distributed, abundant in reserves, and easy to obtain materials, it is preferred to use aeolian sand as roadbed filler when building roads in desert areas. Sand as a subgrade filler is a new technology for road construction in desert areas, and it faces many technical difficulties. Among them, the detection method of the compactness of aeolian sand subgrade has always been a difficult point in construction, because the aeolian sand particles are loose, and disturbances are prone t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/08G01N33/24
Inventor 周志军时绍波袁卓亚石雄伟宋伟何剑
Owner CHANGAN UNIV
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