Combined pile tip pressure monitoring device and assembling and testing method thereof

Abstract

The invention discloses a combined pile tip pressure monitoring device and an assembling and testing method thereof. The combined pile tip pressure monitoring device comprises a base, a connecting assembly, a pressure-bearing assembly and soil pressure boxes; the soil pressure boxes are evenly buried in fine sand in the base; the base, the connecting assembly and the pressure-bearing assembly aresequentially connected and fixed through threaded connecting pieces from bottom to top during installation, and the upper end of the pressure-bearing assembly is connected with a foundation pile reinforcement cage. By means of the device and the method, the technical problems that when an existing method is used for monitoring the pile tip pressure through the soil pressure box, the soil pressurebox cannot be stably fixed to a bearing layer of the pile tip, the soil pressure box is prone to displacement and inclination under the action of uneven pressure, and improper fixation and protectionexist can be effectively solved; in addition, the plurality of soil pressure boxes can be buried at the pile end, overall monitoring of the pile end pressure is achieved, and the problems that only one soil pressure box can be buried in existing pile end pressure monitoring, and the pressure change of the pile end bearing stratum cannot be accurately reflected are solved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a foundation pile tip pressure monitoring device and a method thereof, in particular to a combined device for monitoring pile tip pressure using an earth pressure cell and an assembly and testing method thereof. Background technique [0002] According to the "Technical Specifications for Building Pile Foundation Testing" (JGJ106-2014), when the design requires or the following situations occur, the test pile should be tested and the ultimate bearing capacity of the single pile should be determined before construction: ①Pile foundation with a design grade of Grade A; ② There is no relevant test pile data to refer to the pile foundation with a design grade of B; ③ The foundation conditions are complex, and the quality and reliability of foundation pile construction are low; ④ New pile types or pile foundations formed by new techniques are adopted in this area. In add...

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Problems solved by technology

[0005] In view of the above technical problems, the present invention provides a combined pile tip pressure monitoring device and its assembly and testing method, which can effectively solve the problem of no fixed protection for the earth pressure box when the existing method uses the earth pressure box to monitor the pile tip pressure. Measures, there are technical problems such as the inability to guarantee the initial measurement state of the earth pressure cell, large errors in measurement results, and low precision

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