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Sheet pile

A steel sheet pile and friction treatment technology, which is applied to sheet pile walls, buildings, and foundation structure engineering, can solve the problems of huge cost, unreasonable, and large friction material installation area, so as to extend the length of piling and improve straightness , the effect of preventing bending

Active Publication Date: 2018-06-12
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, such a structure is not necessarily reasonable from the viewpoint of improving drivability by improving the straightness of the steel sheet pile.
Especially in the case of steel sheet piles with long piling lengths, the installation area of ​​the friction reducing material becomes larger and the cost becomes larger

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Since the model experiment (1 / 10 of the actual scale) of the U-shaped steel sheet pile 1 was performed in order to perform the effect verification of this invention, the result is demonstrated below.

[0111] Experiments are carried out by simulating actual construction. A homogeneous sand ground (sand ground) with a depth of 1.5m (actual scale conversion: 15m) was created in a soil box, and a steel sheet pile model that changed the conditions of friction reduction treatment based on hydraulic pressure penetration into the sand ground over the entire length, The penetration resistance ratio (ratio of penetration resistance) and the warp of the steel sheet pile at the time of pile driving under each condition were made into evaluation items, and the experimental result was obtained.

[0112] Experiments were performed by changing the friction-reducing material construction pattern and the construction section length (friction-reducing treatment section length S) of the f...

Embodiment 2

[0140] For the hat-shaped steel sheet pile 5, since the model experiment similar to Example 1 was performed in order to verify the effect of this invention, the result is demonstrated.

[0141] The parameters of the experiment are the friction-reducing material construction pattern and the length S of the friction-reducing treatment interval.

[0142] In the experiment, the entire length of the steel sheet pile was used as the piling length.

[0143] Friction-reducing material construction patterns such as Figures 24A-24E shown. Figures 24A-24E The dimensions in are shown in actual scale. In addition, the plate thickness is 20mm in actual scale.

[0144] The friction-reducing material construction pattern is the same as that of the U-shaped steel sheet pile 1 of Embodiment 1, such as Figures 24A-24E As shown, the following five patterns are formed: Pattern N without friction reducing material 3 (refer to Figure 24A ), from the lower end of the hat-shaped steel sheet p...

Embodiment 3

[0164] Regarding the effect of the present invention, in order to verify the influence of the change in the length of the steel sheet pile, a model experiment (1 / 20 of the actual scale) was performed on the U-shaped steel sheet pile 1, so the results will be described below. .

[0165] Experiments are carried out by simulating actual construction. Create a homogeneous sand foundation with a depth of 2.0m (40m in actual scale conversion) in the soil box, and penetrate into the sand foundation along the entire length based on hydraulic pressure to change the length L to 12m, 24m, and 36m in actual scale conversion. In the steel sheet pile model, the penetration resistance ratio at the time of piling under each condition and the deflection of the steel sheet pile were used as evaluation items, and the experimental results were obtained.

[0166] In addition to the length of the steel sheet pile, an experiment was performed by changing the presence / absence of the friction-reducin...

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Abstract

The present invention obtains a steel sheet pile that can improve the straightness of the steel sheet pile during piling construction without negatively affecting the surrounding foundations, prevent bending, toppling, etc. longer construction. The U-shaped steel sheet pile (1) of the present invention is characterized in that the range of the length of the steel sheet pile from the lower end position of the steel sheet pile when the pile is driven underground is not less than the cross-sectional width of the steel sheet pile and not more than 1 / 3 of the total length of the steel sheet pile. At least the inner peripheral surface side of the surface of the pile is treated to reduce friction.

Description

technical field [0001] The present invention relates to a U-shaped or hat-shaped steel sheet pile (U-shaped steel sheet pile or hat-shaped steel sheet pile). Background technique [0002] Steel sheet piles such as U-shaped and hat-shaped piles are asymmetrical in cross-sectional shape with respect to the normal line of the steel sheet pile wall, so there may be warps when driving on the foundation (see Figure 18 ), rotation (rotation) (torsion (torsion)), etc. [0003] Especially when the piling length of a steel sheet pile becomes long, the said tendency will become remarkable. As a result, ground resistance (penetration resistance) and contact resistance (contact resistance) between adjacent steel sheet pile joints during piling of steel sheet piles increase, causing problems such as difficulty in piling. [0004] In order to prevent the occurrence of the above-mentioned problems, a driveable (drive) length, etc. are set according to the cross-sectional shape (dimension)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/04
CPCE02D5/04
Inventor 恩田邦彦
Owner JFE STEEL CORP