Spiral plate deep load test system based on geotechnical engineering in-situ rotating penetrating vehicle and its application method
A technology of geotechnical engineering and load testing, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve problems such as the inability to exclude dowel bar errors and the inability to adapt to the requirements of deep foundation pit testing. , to achieve the effect of accurately measuring the sinking displacement
Active Publication Date: 2018-04-13
铁三院(天津)工程有限公司
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Problems solved by technology
[0004] At present, the maximum depth of deep foundation pits has exceeded 30m, and the existing spiral plate load test equipment is limited by manpower, windlass or reaction force devices, and the depth can only reach about 12m, so the existing spiral plate load test equipment can no longer adapt to deep foundations. Pit Test Requirements
Moreover, the accuracy of the existing spiral plate load test also has defects, that is, the test results cannot exclude the error caused by the compression bending of the dowel itself
Method used
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Embodiment Construction
[0031] Further illustrate the present invention below in conjunction with embodiment and accompanying drawing.
[0032] Such as figure 1 , 2 The shown spiral plate deep load test system based on the in-situ rotating penetrating vehicle in geotechnical engineering includes a rotating penetrating vehicle 14, hydraulic outriggers 15 symmetrically distributed on the chassis of the vehicle body, ground anchors 16 and their ground anchor oil motors. The hydraulic system includes a vehicle-mounted oil pump driven by the engine of the rotary penetrator vehicle, two parallel hydraulic cylinders 10 fixed on the chassis of the vehicle body and moving up and down synchronously, and a pressure plate fixed on the two parallel hydraulic cylinders to move up and down synchronously and transmit penetration pressure 11. The main shaft box 9 supported on the pressure plate and its reduction transmission gearbox, the main shaft connected to the output shaft of the reduction transmission gearbox,...
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The invention relates to a screw plate deep load test system based on a geotechnical engineering in-situ rotating touch detector and a use method thereof. The test system is composed of a detector assembly and a spiral bearing plate, wherein the detector assembly is composed of a rotating touch detector, a measuring data recorder, a displacement detector and a load pressure detector. According to the system, the displacement detector is arranged at the bottom end of a hollow dowel bar, so that the influence of the bending of the dowel bar on the test accuracy can be fully eliminated; the system utilizes the current geotechnical engineering in-situ rotating touch detector to perform screw plate deep load test; a reacting force device and a hydraulic device can enable the test depth to be 30m or above; the test can be performed without drilling hole; according to the system, the moveable and fixed grid plates of a linear grid-holding displacement sensor are respectively arranged on a hollow force transferring shaft and a driving joint of the displacement detector; in the test process, the shell containing the driving joint of the displacement detector is fixed along with a sleeve and the hollow force transferring shaft is moved along with the hollow dowel bar under the loading, so that the sinking displacement of the spiral bearing plate can be accurately measured.
Description
technical field [0001] The invention belongs to a spiral plate load test system, in particular to a spiral plate deep load test system based on an in-situ rotary penetrating vehicle for geotechnical engineering and a use method thereof. Background technique [0002] The spiral plate load test is suitable for determining the bearing capacity, deformation modulus and other geotechnical parameters of deep foundation soil or foundation soil below the water level, and provides a basis for the design of pile foundations and foundation pits. [0003] The existing spiral plate load test equipment uses manpower or windlass to screw the spiral pressure plate into the predetermined depth below the ground, applies load to the spiral pressure plate through the dowel bar, observes and records the foundation soil under the plate The subsidence displacement of the plate after compression can obtain the load-subsidence displacement-time relationship curve of the foundation soil, and then obt...
Claims
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IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0048G01N2203/0284
Inventor 陈新军许再良王福
Owner 铁三院(天津)工程有限公司