JP2005290712A - Filling structure having earthquake-resistant measures installed therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filling structure which is constructed in soft ground and has earthquake-resistant measures installed therein. <P>SOLUTION: The filling structures (10, 20) have installed therein horizontally extending rigid bodies (12, 22) over the entire area of a lower portion thereof, and a drain (14, 24) at a location below the rigid bodies. Each rigid body is formed by corrosion-proofing waste materials including steel plates and sheet piles, or by hardening a material such as sediment, concrete masses, wide flange beams, steel plates, and sheet piles, by cement. The drain is preferably arranged so as not to extend in an outer water zone direction but to extend in an inner water zone direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an embankment structure that has been subjected to earthquake resistance measures.

  When embankment or other embankment is applied to soft ground, if the foundation ground liquefies, the embankment may lose ground strength and be damaged. For liquefaction of embankments and other embankments during earthquakes, measures such as loosening the slope, reducing the weight of embankment materials, improving the foundation ground, and draining groundwater are generally taken. At present, there is no perfect countermeasure. In addition, as a measure against unequal settlement of the embankment, a method of placing a rigid body at the bottom of the embankment can be considered, but it has been adopted because of its high cost, difficulty in analysis, and difficulty in repairing in the event of damage. Absent.

  As mentioned above, seismic countermeasures for embankments in soft ground are difficult, so construction is done without permanent countermeasures, and it is operated while repairing damaged areas of embankments every time an earthquake occurs. However, the safety in case of flooding before the completion of repair work after damage is insufficient. Under such circumstances, there is a demand for effective seismic countermeasures for embankments in soft ground.

  Therefore, an object of the present invention is to provide an embankment structure in which effective seismic countermeasures are taken for embankment in soft ground.

  An embankment structure that has been subjected to earthquake resistance measures according to claim 1 of the present application includes a rigid body that extends substantially horizontally over substantially the entire lower part of the embankment structure, and a drain disposed below the rigid body. It is characterized by being.

  The embankment structure to which the earthquake resistance measure according to claim 2 of the present application is applied is the embankment structure according to claim 1, wherein the rigid body is corrosion-resistant processed from a waste material such as a steel plate or a sheet pile, or earth and sand, concrete. It is characterized by being formed of a material such as a lump, H-shaped steel, steel plate, sheet pile, etc., solidified with cement.

  The embankment structure to which the earthquake resistance measure according to claim 3 of the present application is applied is the embankment structure according to claim 1 or 2, wherein the drain does not extend in the direction of the external water area but extends in the direction of the internal water area. It is characterized by being arranged.

  According to the present invention, by using waste materials or locally generated materials, it is possible to take an economic seismic measure suitable for the local characteristics. In addition, according to the present invention, it is possible to prevent uneven settlement and reduce the amount of settlement displacement. Moreover, according to this invention, by arrange | positioning a rigid body, the raise of the groundwater to a banking material can be prevented, and the drain effect can be heightened. Furthermore, according to the present invention, by arranging the drain, it is possible to prevent an increase in the pore pressure due to groundwater and to increase the stability of the embankment structure against liquefaction.

  Next, an embankment structure according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing an embankment structure according to a preferred embodiment of the present invention. The embankment structure according to a preferred embodiment of the present invention, indicated generally by the reference numeral 10 in FIG. 1, comprises a rigid body 12 extending substantially horizontally over substantially the entire lower part. As the rigid body 12, a material obtained by subjecting a waste material such as a steel plate or a sheet pile to a corrosion-resistant process is used. Although two upper and lower rigid bodies 12 are shown in FIG. 1, the number of the rigid bodies 12 may be one or three or more.

  By arranging the rigid body 12 at the lower part of the embankment structure 10, the stress generated in the embankment structure 10 is uniformly dispersed, and uneven settlement of the embankment structure 10 itself can be prevented.

  A drain 14 is disposed below the rigid body 12 of the embankment structure 10. As the drain 14, a drain mat, a gravel layer, or the like is used. In addition, it is preferable that the drain 14 is disposed so as not to extend in the direction of the outer water section but in the direction of the inner water section. The reason why the drain 14 does not extend in the direction of the outside water area is to prevent water from being discharged from the outside water area to the inside water area.

  By arranging the drain 14, it is possible to prevent an increase in the pore pressure of the groundwater and intrusion into the embankment structure 10 of the groundwater, and even when liquefaction occurs in the underground of the foundation ground, The amount of settlement can be equalized and the embankment structure 10 as a whole can be displaced.

  FIG. 2 is a schematic view showing a modified form of the embankment structure 10. The embankment structure 20 shown in FIG. 2 uses, as the rigid body 22, a material obtained by solidifying a material such as earth and sand or a concrete lump with cement, or a material obtained by solidifying H-shaped steel, a steel plate, a sheet pile or the like with cement to increase rigidity. Except for this point, it has substantially the same configuration as the embankment structure 10. In FIG. 2, reference numeral 24 indicates a drain.

  In addition, the range which arrange | positions the rigid bodies 12 and 22 is determined according to the condition of the ground of the installation location of a banking structure, and the intensity | strength (elastic modulus) of material used. Moreover, the range, material, etc. which arrange | position the drains 14 and 24 are determined according to the condition of the ground of the installation location of a banking structure.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

It is the schematic which showed the embankment structure which concerns on preferable embodiment of this invention. It is the schematic which showed the deformation | transformation form of the embankment structure.

Explanation of symbols

10, 20 Embankment structure 12, 22 Rigid body 14, 24 Drain

Claims (3)

An embankment structure with earthquake resistance measures,
A rigid body extending substantially horizontally across substantially the entire bottom of the embankment structure;
An embankment structure comprising a drain disposed below the rigid body. The rigid body is formed of a material obtained by subjecting a waste material such as a steel plate or a sheet pile to corrosion prevention, or a material obtained by solidifying a material such as earth and sand, a concrete lump, an H-shaped steel, a steel plate, or a sheet pile with cement. The embankment structure according to claim 1. 3. The embankment structure according to claim 1, wherein the drain is arranged so as not to extend in the direction of the outer water section but to extend in the direction of the inner water section.

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