Environmentally-friendly load box

Abstract

The invention discloses an environmentally-friendly load box. Relative to a traditional load box, the environmentally-friendly load box is characterized in that displacement pull wires comprise steelwire ropes and pull wire outer sleeves positioned on the outer surfaces of the steel wire ropes; and the tail ends of the pull wire outer sleeves are hermetically connected with an upper bearing platethrough rubber sleeves. According to the environmentally-friendly load box, after concrete pouring, the pull wire outer sleeves and the rubber sleeves separate concrete grout from the steel wire ropes, displacement change is accurately transmitted, and accurate data is provided; conventionally, when rigid displacement pull rods are utilized, outer protective sleeves of the displacement pull rodsare extruded or bent to a certain degree due to factors like stress change of concrete of the outer protective sleeves of the displacement pull rods after solidification, and self weight, the inner displacement pull rods are correspondingly stressed, displacement change cannot be accurately reflected, while the flexible steel wire ropes are not affected by the factors, the displacement pull wiresonly need to be approximately perpendicular to the load box during mounting, perpendicular mounting does not need to be guaranteed, and cost of the displacement pull wires is reduced compared with that of the displacement pull rods.

Description

technical field [0001] The invention relates to the technical field of load boxes, in particular to an environment-friendly load box. Background technique [0002] The load box is the pressure test unit or loading device in the self-balancing static load test of the foundation pile. It is pre-buried at the balance point of the pile body, loaded step by step through the load box, observed the displacement, obtained data, and plotted the upper and lower pile body. Load settlement displacement and uplift curve, so as to obtain the single pile vertical compressive (pullout) ultimate bearing capacity of the test pile. The displacement change of the traditional load box is transmitted by the displacement rod, and the displacement rod has relatively large rigidity. Although the displacement rod has a protective cover, the displacement rod is exposed at the end of the connection with the load box, otherwise it cannot be connected. At this time Concrete is easy to solidify the displ...

AI Technical Summary

Problems solved by technology

The displacement change of the traditional load box is transmitted by the displacement tie rod, and the displacement tie rod has relatively large rigidity. Although the displacement tie rod has a protective cover, the displacement tie rod is exposed at the end of the connection with the load box, otherwise it cannot be connected. At this time Concrete is easy to solidify the displacement rod, so that the displacement cannot be accurately reflected. Secondly, the concrete on the outer protective sleeve of the displacement rod will react to stress changes after solidification, and factors such as its own weight will squeeze or squeeze the outer protective sleeve of the displacement rod. A certain bending effect causes the internal displacement rod to be subjected to corresponding stress and cannot accurately respond to displacement changes, and it is necessary to ensure its verticality during installation, which is inconvenient to install

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