Determination of coarse-grained soil k 0 value of large k 0 Consolidation instrument

A coarse-grained soil and consolidation instrument technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the residual strain of the ring body, the pressure coefficient of the static side of the difficult soil body, and the inability to accurately measure the horizontal direction. Stress and other problems, to achieve the effect of accurate measurement and avoid errors

CN107036899BActive Publication Date: 2019-08-27HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-08-27

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Abstract

The invention relates to a large-scale K0 consolidometer of measuring a coarse-grained soil K0 value. The consolidometer comprises a cylindrical container which is used for placing coarse-grained soil samples, wherein a base of the cylindrical container is fixed to a base plate, a compression system is arranged on the top end of the coarse-grained soil samples, a compression cover plate and a first porous plate are arranged between the compression system and the top end of the coarse-grained soil samples, and a plurality of permeable grooves are formed in the surface of the compression cover plate; a second porous plate is arranged between the bottom end of the coarse-grained soil samples and the base of the cylindrical container, meanwhile a plurality of permeable grooves are formed in the portion, close to the second porous plate, of one side of the base, three evenly distributed liquid pressure bags are embedded in the inner wall of the coarse-grained soil samples, the liquid pressure bags are connected with a burette and a hydraulic sensor through a three-way valve respectively, the K0 consolidometer further comprises a data collection system, and the hydraulic sensor and the compression system are connected with the data collection system simultaneously; according to the large-scale K0 consolidometer, the side liquid pressure bags and the hydraulic sensor which is connected with the three-way valve are adopted, and the size of lateral force can be measured quickly and precisely.
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Description

technical field

[0001] The invention relates to a method for measuring coarse-grained soil K 0 value of large K 0 The consolidation instrument belongs to the field of indoor rock and soil test research. Background technique

[0002] The static lateral pressure coefficient of soil plays an important role in the study of soil deformation, static earth pressure of retaining structures, underground building enclosure structures, tunnel lining structures, and lateral friction calculations of piles. development, underground engineering and deep foundation pit engineering are gradually increasing, soil K 0 The selection of values ​​has received more and more attention.

[0003] Static lateral pressure of soil (K 0 ) coefficient is an important elastic parameter in the soil, which can reflect the change of horizontal stress in the soil, and can also directly calculate the distribution of earth pressure acting on the retaining structure and the safety of the project.

[0004] Ho...

Examples

Embodiment Construction

[0026] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0027] Such as Figure 1-Figure 7 As shown, the application includes the following technical features: 1: bracket, 2: axial pressure jack, 3: hydraulic source interface, 4: force sensor, 5: pressure cover plate, 6: burette, 7: first permeable plate, 8 : Permeable tank, 9: Rigid retaining ring, 10: Coarse-grained soil sample, 11: Hydraulic bladder, 12: Three-way valve, 13: Hydraulic sensor, 14: Second permeable plate, 15: Fixing nut, 16: Reaction force Frame, 17: cylindrical container, 18: data acquisition system, 19: bottom plate; a method for measuring coarse-grained soil K 0 value of large K 0 Consolidation instrument, including a cylindrical container, t...