Single-pile compressive static load test device, construction method and special tool

Abstract

The invention discloses a single-pile compressive static load test device. A horizontally arranged pull cap is arranged on each of the upper surfaces of two end parts of a secondary steel beam; the pull caps are connected with an inclined anchor pile through a plurality of counter-force ribs; the plurality of counter-force ribs are symmetrically arranged on the left side and the right side of a secondary steel beam; the center lines of the pull caps and the top center of the inclined anchor pile are positioned on the same vertical line; each pull cap is provided with a plurality of grid bar type through seams which correspond to the counter-force ribs and extend in the left-right direction; the upper end parts of the counter-force ribs penetrate through the through seams and are locked onthe pull caps through locking nuts; the lower end of each counter-force rib is a bent section; the bent position of each counter-force rib is the intersection position of the counter-force rib and thetop opening of the inclined anchor pile; the bent section of each counter-force rib is parallel to the longitudinal line of the inclined anchor pile and attached to and welded to the side wall of theinclined anchor pile; and the portion, located above the inclined anchor pile, of each counter-force rib is vertically arranged. The invention also discloses a construction method of the device and aspecial bending tool for realizing the construction method. Effective connection between the inclined anchor pile and the counter-force rib can be achieved.

Description

technical field [0001] The invention relates to a single pile vertical compression static load test, in particular to a single pile compression static load test device, a construction method and a special tool. Background technique [0002] Single pile vertical compressive static load test is a test method to directly obtain the value of single pile vertical compressive ultimate bearing capacity, and it is also a test method currently recognized as the most reliable and closest to the real situation. At the same time as the static load test, important parameters such as the axial force distribution of the pile body, the side friction resistance of each rock and soil layer around the pile, the pile tip resistance, the pile tip displacement, and the elastic compression of the pile body can be obtained through the sensors embedded in the pile body. It provides a basis for construction units and design units to select construction technology parameters and pile types when design...

AI Technical Summary

Problems solved by technology

However, since the anchor piles are inclined piles, an angle will be formed between the inclined anchor piles and the reaction tendons during the vertical compression test. If effective measures cannot be taken to connect, the reaction tendons may be damaged due to uneven force. The risk of breaking or cracking failure of the connecting part, which will lead to the failure of the test, and serious safety accidents may also occur

Considering that the wind, waves and weather conditions in the sea areas where offshore wind farms are located are generally harsh, the number of working days suitable for the test is very limited, and some sea areas may be concentrated within two to three months. Extend the trial cycle, if the timing of the trial is missed, the progress of the entire trial may be delayed by several months or even a year

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