Foundation pile static load testing method based on flat plate load tester
A technology of plate load and test method, which is applied in the test of basic structure, basic structure engineering, construction, etc., can solve problems such as distortion of test data, and achieve the effect of stabilizing the support frame and improving the accuracy of test data.
Active Publication Date: 2020-04-21
山东恒吉勘察设计有限公司
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Problems solved by technology
[0004] The above existing technical solutions have the following defects: when the hydraulic cylinder exerts pressure on the beam, the support force exerted by the hydraulic cylinder on the beam is greater than the support force exerted by the pier on the beam, and the beam arches upward under the action of the counterweight The arc surface, so the value measured by the dial gauge also includes the deformation of the beam, and then the settlement of the foundation pile detected is greater than the actual settlement of the foundation pile, which leads to the problem of distortion of the settlement test data of the foundation pile under different pressures
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[0035] Example: such as figure 1 Shown, be a kind of foundation pile static load test method based on plate load tester disclosed by the present invention, comprise the following steps:
[0036] Step 1: install the hydraulic cylinder 102, such as figure 2 As shown, the upper end surface of the foundation pile 100 is cleaned to remove impurities on the upper end surface of the foundation pile 100 . Then the pile head 101 is placed on the foundation pile 100 , the pile head 101 is disc-shaped and located in the middle of the foundation pile 100 . The hydraulic cylinder 102 is placed on the pile head 101, the cylinder body of the hydraulic cylinder 102 is placed on the upper end surface of the pile head 101, and the piston rod of the hydraulic cylinder 102 faces upward. The hydraulic cylinder 102 is arranged vertically and coaxially with the pile head 101 .
[0037] Step 2: set up the support frame 103, such as figure 1As shown, the support frame 103 includes a pier 104 and ...
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The invention discloses a foundation pile static load testing method based on a flat plate load tester, and belongs to the field of geotechnical investigation. The foundation pile static load testingmethod comprises the following steps that firstly, a hydraulic cylinder is installed, a pile head is placed on a foundation pile, and the hydraulic cylinder is placed on the pile head; secondly, a supporting frame is erected, the supporting frame comprises pier bases and first supporting beams, the pier bases are placed on the ground on the two sides of the pile head, the first supporting beams are erected on the pier bases, and a plurality of balancing weights are arranged above the first supporting beams; thirdly, a reference beam is erected, namely, a horizontal reference beam is erected, and the two sides of the reference beam are fixedly connected to the pier bases; fourthly, a dial indicator is installed, a base of the dial indicator is installed on the pile head, and the detection end of a head of the dial indicator is abutted against the reference beam; and fifthly, detection is conducted, the hydraulic cylinder is started, the upper end of the hydraulic cylinder is abutted against the lower ends of the first supporting beams, and the reading of the dial indicator under different pressures of the hydraulic cylinder is recorded. The foundation pile static load testing methodhas the effect that the accuracy of settlement testing data of the foundation pile under different pressures is improved.
Description
technical field [0001] The invention relates to the technical field of geotechnical survey, more specifically, it relates to a method for testing the static load of foundation piles based on a flat load measuring instrument. Background technique [0002] Geotechnical engineering survey refers to the activities of ascertaining, analyzing and evaluating the geological, environmental characteristics and geotechnical engineering conditions of the construction site according to the requirements of the construction project, and compiling survey documents. The plate load tester is a commonly used equipment in geotechnical engineering investigation. The instrument is suitable for testing the subgrade coefficient of coarse and fine-grained soils and subgrades and foundations after soil filling and compaction, and can also be used to calculate the deformation modulus of uniform subgrade soil. A plate load tester includes a hydraulic cylinder and a dial gauge. [0003] At present, a ...
Claims
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IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 徐凯徐博涵刘胜楠
Owner 山东恒吉勘察设计有限公司