Cone penetration test reaction device comprising variable-diameter spiral ground anchors and force exerting disc

Abstract

The invention discloses a cone penetration test reaction device comprising variable-diameter spiral ground anchors and a force exerting disc. The cone penetration test reaction device comprises the ground anchors (2) and the force exerting disc (9) and is characterized in that the ground anchors (2) are mounted between rack support legs (4), a drilling head (1) is arranged at the bottom of each ground anchor (2), a variable-diameter spiral blade (3) is connected to the upper part of each drilling head (1), a threaded section (7) is arranged at the top of each ground anchor (2), the top end of each threaded section (7) is connected with a clamping bolt (8), a ground anchor weight (5) is mounted above the variable-diameter spiral blade (3) of each ground anchor (2), two ends of each ground anchor weight (5) are hung on the rack support legs (4), and a ground anchor nut (6) is mounted at the threaded section (7) of each ground anchor (2) and is in press fit above the corresponding ground anchor weight (5); the force exerting disc (9) can cooperate with the clamping bolts (8) at the top ends of the ground anchors (2) through a clamping groove (10) formed in the middle. The cone penetration test reaction device is simple in structure, portable and practical.

Description

technical field [0001] The invention belongs to the technical field of static sounding devices, and in particular relates to a static sounding counterforce device including a variable-diameter helical ground anchor and a force plate. Background technique [0002] The static penetrating machine is a kind of equipment widely used in construction, water conservancy, electric power and other fields to test the foundation soil layer. Its reaction force is usually solved in three ways, that is, using ground anchors, heavy objects or the self-weight of vehicles as Reaction force. Among them, the device using the ground anchor as the reaction force is economical and convenient, and has a wider application range, making this method the most frequently used. [0003] In the prior art, most of the ground anchors of the reaction force device adopt single-blade ground anchors, multi-blade ground anchors and spiral ground anchors with equal diameters, but because the blades on the ground...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, most of the ground anchors of the reaction force device adopt single-blade ground anchors, multi-blade ground anchors and spiral ground anchors with equal diameters, but because the blades on the ground anchors are equal-diameter blades, the force on the end of the drill pipe is greater Large, not easy to drill in, and easy to tilt the rod body

In addition, at this stage, when using manpower to drill into the ground anchor, most of them use a longer booster rod to pass through the ferrule at the tail of the ground anchor, and rotate the booster to drill by increasing the length of the force arm. At this time, the booster rod The radius of rotation is relatively large, which requires a relatively large and relatively flat working surface area. However, in areas such as mountain slopes and hills, the use of afterburner rods for augmented drilling will face the situation of insufficient working surface area. Can no longer meet the existing actual needs

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