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Method for fixing pile head in filling pile static loading test

A fixing method and static load test technology, which is applied in the test of basic structure, construction, basic structure engineering, etc., can solve the waste of manpower and material resources, the steel sleeve cannot be removed or is difficult to remove, and the verticality and elevation of steel sleeve installation are not easy to control and other issues to achieve the effect of improving work efficiency, reducing rework rate and reducing cost

Inactive Publication Date: 2011-01-19
WEIFANG CHANGDA CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual construction, when the steel sleeve is installed, there are problems that the verticality and elevation of the steel sleeve installation are not easy to control, and it is difficult to meet the design requirements for the pile head elevation and the quality standard for the installation of the steel sleeve. In addition, after the test is completed, the steel sleeve cannot be dismantled or dismantled Difficult, easily causing waste of manpower and material resources

Method used

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  • Method for fixing pile head in filling pile static loading test
  • Method for fixing pile head in filling pile static loading test
  • Method for fixing pile head in filling pile static loading test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1, the construction of the cast-in-place pile body 8 and steel cage 9 of a high-rise building filled with superfluid helical drilling is completed, and after the cast-in-place pile is piled, the concrete age of the pile to be inspected reaches 28 days or is reserved for the same condition of curing test. When the block strength reaches the design strength, dig out the cast-in-place pile head 6 on the upper end of the cast-in-place pile body 8, chisel the cast-in-situ pile head 6 to the design elevation, and then fix 2 steel hoops on the cast-in-place pile head 6, 2 The spacing between steel hoop metal sleeves 1 is 15cm, forming as figure 2 According to the structure shown, fill the gap between the steel hoop and the cast-in-situ pile head 6 with a filler, the filler is sieved fine sand, and the sieved fine sand makes the steel hoop fully contact with the cast-in-place pile head 6, and then adjust the tightness The adjusting bolt 4 of the fixing mechanism fasten...

Embodiment 2

[0018] Example 2, the construction of the cast-in-place pile 8 and steel cage 9 poured with superfluid helical drilling in a high-rise building is completed. After the cast-in-place pile is piled, the concrete age of the pile to be inspected reaches 28 days or is reserved for curing under the same conditions. When the block strength reaches the design strength, dig out the cast-in-place pile head 6 on the upper end of the cast-in-place pile body 8, chisel the cast-in-situ pile head 6 to the design elevation, and then fix 2 steel hoops on the cast-in-place pile head 6, 2 The spacing between steel hoop metal sleeves 1 is 15cm, forming as figure 2 In the structure shown, fill the gap between the steel hoop and the cast-in-situ pile head 6 with a filler, the filler is water glass, and the water glass makes the steel hoop fully contact with the cast-in-situ pile head 6, and then adjust the adjustment of the fastening mechanism Bolt 4 fastens the steel hoop on the cast-in-situ pile...

Embodiment 3

[0020] Example 3, the construction of the cast-in-place pile 8 and the reinforcement cage 9 of a high-rise building filled with superfluid helical drilling is completed. After the cast-in-place pile is piled, the age of the concrete of the pile to be inspected reaches 28 days or is reserved for curing under the same conditions. When the block strength reaches the design strength, dig out the cast-in-place pile head 6 on the upper end of the cast-in-place pile body 8, chisel the cast-in-situ pile head 6 to the design elevation, and then fix 2 steel hoops on the cast-in-place pile head 6, 2 The spacing between steel hoop metal sleeves 1 is 15cm, forming as figure 2 In the structure shown, fill the gap between the steel hoop and the cast-in-situ pile head 6 with a filler, the filler is mortar, and the mortar makes the steel hoop and the cast-in-place pile head 6 fully contact, and then adjust the adjusting bolt 4 of the fastening mechanism Fasten the steel hoop on the pile head ...

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Abstract

The invention relates to a method for fixing a pile head in a filling pile static loading test. After the filling pile is formed, the pile head is fixed and then the filling pile static loading test is carried out. The method for fixing the pile head is to fix the pile head by using a steel hoop, wherein the steel hoop comprises an annular metallic sheath which is provided with an opening and a fastening mechanism; and the steel loop is provided with an opening and an adjustable connecting bolt. Therefore, the method has the advantages of achieving the extremely convenient installation and detachment of the steel loop and the easy control of the verticality and elevation of the steel hoop during the installation, greatly reducing a re-work rate during the installation of the steel hoop andthe labor force and the material consumption during the adjustment of the verticality and the elevation of the steel loop, realizing high economy, meeting construction design requirements and improving working efficiency.

Description

technical field [0001] The invention relates to an engineering cast-in-place pile, in particular to a method for fixing a pile head in a static load test of the cast-in-place pile, and belongs to the technical field of construction. Background technique [0002] The technical specification for building pile foundation stipulates that the static load test should be used to determine the vertical compressive bearing capacity of a single pile before construction. The construction technology of the traditional cast-in-situ pile static load test is as follows: figure 1 Shown: After the cast-in-place pile is piled, first measure the elevation of the cast-in-place pile head 6, then connect and fix the cylindrical closed steel sleeve 7 made of thin steel plate with the steel cage 9 of the cast-in-place pile, and then lower the cast-in-place pile steel cage 9. After the construction of the cast-in-situ pile is completed, when the concrete reaches a certain strength, a static load t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
Inventor 张连悦孟宪礼房海王丰娟唐言成辛跃军王明艳
Owner WEIFANG CHANGDA CONSTR GROUP
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