Loading method of pile foundation vertical static load test
A load test and vertical technology, which is applied in the direction of basic structure test, basic structure engineering, construction, etc., can solve the problems of unsuitable use, high cost, slow speed, etc., and achieve the effect of low cost, wide applicability and fast loading
Inactive Publication Date: 2009-10-28
应义淼
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Problems solved by technology
However, the manual stacking method is slow in loading and unloading, so the efficiency is low and the cost is high
Large-tonnage stacking is also dangerous, and it is not suitable for some stacking materials or areas near slopes.
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[0016] Reference attached figure 1 with 2 . The loading method for vertical static load test of pile foundation provided by the present invention includes the following steps in sequence:
[0017] (1) Installation of static load loading support mechanism 1. The static load loading support mechanism 1 includes a side wall structure 11 and a roof structure 12 that can be raised and lowered. First install the side wall structure 11 of the static load loading support mechanism so that the center of the test pile body 6 coincides with the center of the static load support mechanism; then install the liftable top cover structure 12 of the static load loading support mechanism, and set the pressure sensor 2 is placed between the roof structure 12 and the pile top.
[0018] (2) A closed and compressible space is formed on the ground to contain the static load loading support mechanism; in this embodiment, the sealing film 3 is used, that is, the sealing film 3 is covered on the support m...
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The invention provides a loading method of pile foundation vertical static load test. The method includes the following steps of: installing a static load loading support mechanism; forming a closed compressible space on the ground to contain the static load loading support mechanism therein; controlling the vacuum degree of the closed compressible space until meeting the conditions for finishing the load test; and relieving the loaded pressure of the static load in a stepped manner as well as the pile shaft load. By using the acting principle of high atmospheric pressure, the method changes the vacuum degree of the closed compressible space so as to exert different pressures on the static load loading support mechanism, collects the pressure generated by the difference between inside pressure and outside pressure through a lifting capping structure to form the concentrated load required by the test and conveys the concentrated load to the pile head, thus realizing the loading function of the pile foundation test. The method leads to quicker and safer loading of the pile foundation load test, and has low cost as well as wide applicability.
Description
Technical field [0001] The invention relates to a loading method for a vertical static load test of a pile foundation. Background technique [0002] At present, the pile foundation vertical static load test loading method, in addition to using the adjacent pile foundation as the reaction frame, most of the manual stacking method is used. However, the manual stacking method is slow in loading and unloading, so the efficiency is low and the cost is high. Large-tonnage stacking is also dangerous, and it is not suitable for use in areas where some stacking materials are lacking or near slopes. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a loading method for the vertical static load test of the pile foundation which makes the loading of the pile foundation load test faster, safer and low in cost. To this end, the present invention adopts the following technical scheme: It includes the following steps: [0004] (1). Insta...
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IPC IPC(8): E02D33/00
Inventor 应义淼
Owner 应义淼