Deeply-loadable spiral plate load test device and method thereof
A technology of load test and spiral plate, which is applied in the field of foundation soil survey, construction, infrastructure engineering, etc., can solve the problems affecting the reliability and accuracy of the test results, so as to achieve the authenticity and reliability of the test results, avoid measurement errors, and improve The effect of test accuracy
Inactive Publication Date: 2013-07-10
ANHUI TRANSPORTATION HLDG GRP CO LTD +1
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Problems solved by technology
However, the spiral plate load test also has its own defects. Since the load of the spiral plate is transmitted by the dowel rod, this requires the rigidity of the rod to be large enough. In fact, if the connection of the rod is taken into account, when the rod reaches a certain After the length, it is bound to produce a certain deflection; in addition, the spiral plate uses a jack on the ground to apply a load to the dowel bar, and the verticality of the dowel bar is a key factor affecting the reliability and accuracy of the test results
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[0048] Below in conjunction with accompanying drawing and embodiment describe in detail:
[0049] 1. Device
[0050] 1. Overall
[0051] like figure 1 , the device includes a counter force device (00), a loading device (10), a force measuring device (20), and a spiral plate (30).
[0052] The spiral plate (30), the loading device (10) and the reaction device (00) are sequentially connected from bottom to top to form a test platform, and the force measuring device (20) is connected to the loading device (10) to form a deep spiral plate load test device.
[0053] 2. Function block
[0054] Reaction device 00:
[0055] It consists of ground anchor 1, beam 2, pressure plate 3, nut 4, hoop 5, ground anchor dowel 6, twist head 7 and extension rod 8;
[0056] One end of the ground anchor 1 is connected to the twist head 7, and the twist head 7 is connected to the extension rod 8, and the other end of the ground anchor 1 is rotated clockwise by manpower to a certain depth; remove t...
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The invention discloses a deeply-loadable spiral plate load test device. The deeply-loadable spiral plate load test device comprises a ground anchor and a spiral plate, wherein the ground anchor is connected with a ground anchor dowel bar; a cross beam is arranged on the ground anchor dowel bar; one end of the spiral plate is connected with one end of a deeply-loading one-way oil hydraulic jack; the other end of the deeply-loading one-way oil hydraulic jack is connected with one end of the dowel bar; a pressure sensor for measuring oil pressure thereof is arranged on the deeply-loading one-way oil hydraulic jack; the other end of the dowel bar is connected with the cross beam through a dowel post; the pressure sensor is connected with a data acquisition instrument; and the deeply-loading one-way oil hydraulic jack is connected with a manual oil pump. The invention further discloses a deeply-loadable spiral plate load test method. Through deep loading, a measuring error caused by load eccentricity can be avoided, the test precision can be improved, and reality and reliability of the test result can be ensured; bearing capacities and deformation coefficients of soil at different depths can be tested and studied; and the deeply-loadable spiral plate load test device and the deeply-loadable spiral plate load test method are applicable to on-site test on the bearing capacities and deformation characteristics of clay, sandy soil, silt and other foundation soil.
Description
technical field [0001] The invention relates to the field of geotechnical on-site testing, in particular to a spiral plate load test device capable of deep loading, and also relates to a deep loading spiral plate load test method, which is used to test the bearing capacity and deformation of foundation soil at different depths on site Feature parameters. Background technique [0002] It is the most direct and reliable method to determine the bearing capacity of foundation soil by using a large-scale plate load test, but the plate load test period is long and the capital investment is large, so it is impossible to use it on a large scale, especially for linear projects such as roads and railways. in this way. Therefore, the in-situ testing technology with fast testing speed and low cost is widely used in geological exploration, among which the spiral plate load test is currently the most widely used in-situ testing technology. [0003] The spiral plate load test has evolved...
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Inventor陈善雄胡可曹光伦罗红明余飞戴张俊
OwnerANHUI TRANSPORTATION HLDG GRP CO LTD