Full-scale testing apparatus for spread foundations

A technology for expanding the foundation and test equipment, which is applied in the field of expanding the base full-scale test equipment, can solve the problems of increasing test costs and wasting time, and achieve the effects of reducing time, improving experimental efficiency, and saving costs

Active Publication Date: 2016-08-17
STATE GRID CORP OF CHINA +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a full-scale test device for an extended foundation aiming at the defects of the traditional full-scale test device for an extended concrete foundation, so as to solve the problem of the expansion

Method used

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  • Full-scale testing apparatus for spread foundations

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Embodiment

[0025] Such as figure 1As shown, a full-scale test device for an extended foundation of the present invention includes a foundation pit, and a base reaction force measuring device buried in the backfill soil layer 14 is arranged at the bottom of the foundation pit, and an expanded foundation is placed above the base reaction force measuring device. The base test piece 11, the top of the expanded base test piece 11 is equipped with a force transmission short column 5, the expanded base test piece 11 is provided with a strain measuring device, and also includes a hydraulic static pile driver 1, the hydraulic static pile driver The jaw of machine 1 is clamped with the power transmission element concrete pile 2 that is positioned at power transmission short column 5 tops. Further, the top of the force transmission short column 5 and the bottom of the force transmission element concrete pile 2 are provided with grooves of the same size, and a pressure sensor 3 is arranged in the gr...

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Abstract

The invention discloses a full-scale testing apparatus for spread foundations. The full-scale testing apparatus comprises a foundation pit and a hydraulic static pile press. Base reaction measuring devices which are buried in a backfilled soil layer are arranged at the bottom of the foundation pit, a spread foundation test piece is arranged above the base reaction measuring devices, a force transfer short column is mounted on the top of the spread foundation test piece, a strain measuring device is arranged on the spread foundation test piece, and a force transfer plain concrete pile which is positioned above the force transfer short column is clamped at a jaw of the hydraulic static pile press. The full-scale testing apparatus has the advantages that reaction frame jack systems are replaced by the hydraulic static pile press, accordingly, the experimental efficiency of full-scale tests for concrete spread foundations with large width-height ratios can be effectively improved, the cost can be saved, and the time can be shortened; fine sand with the thickness ranging from 4 centimeters to 10 centimeters needs to be arranged on steel-wire soil pressure cells, so that stress can be effectively distributed, and the test precision can be improved; a rigid pressure plate is welded on the top of the spread foundation test piece, accordingly, sections of pillars can be simulated, and load applied by the force transfer short column can be uniformly transmitted to the spread foundation test piece.

Description

technical field [0001] The invention relates to the design field of a concrete extended foundation of a power transmission line, in particular to a full-scale test device for an extended foundation. Background technique [0002] Currently, concrete extension foundations are one of the main forms of transmission line towers. In the construction of UHV transmission lines, the foundation cost accounts for 16% to 20% of the total investment, so the optimal design of the foundation plays an important role in saving the construction period and cost. [0003] Reducing the excavation depth of the foundation soil, that is, reducing the height of the foundation steps, can greatly reduce the cost and speed up the construction period from an economic point of view. However, the concrete extended foundation strictly complies with the current national industry standard that the step width-to-height ratio does not exceed 2.5, so if the height of the foundation steps is reduced, the step w...

Claims

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Application Information

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IPC IPC(8): E02D33/00E02D27/42
CPCE02D27/42E02D33/00
Inventor 梁兴李元齐高兴焦听雷许可罗金辉陈健飞顾朝阳
Owner STATE GRID CORP OF CHINA
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