JPH011817A - Sheet pile segment greening earth retaining structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a greening earth retaining structure using sheet pile segments. The present invention is particularly valuable when applied to double-wall or leaning structures used in landscaping and flood control.

[Purpose of the invention] Japan is often hit by torrential rains caused by typhoons, etc., and has steep mountainous areas, so water flowing down steep slopes not only erodes slopes and riverbeds, causing devastation, but also landslides. Streams flow and attack forests, rivers, civil engineering structures, cultivated land, and villages, causing great damage. In addition, damage caused by mudflows and landslides caused by rain or collapse of volcanic ash and debris deposited by volcanic eruptions is also significant.

The purpose of the present invention is to provide a stable greening earth retaining structure, such as a double-wound erosion control dam or a leaning retaining wall, which has appropriate water permeability and water retention and is particularly effective in preventing such damage. do.

[Prior Art] As such greening earth retaining structures, the present inventor has already developed concrete block stacked construction (Utility Model Publication No. 55-24192, Utility Model Publication No. 57-46448, Utility Model Publication No. 58-3873, etc.) and expanded metal unit stacked construction. (Tokuko Showa 57-1
3692 etc.).

However, block stacking is always unsatisfactory in terms of transportation and on-site handling due to the large weight of the blocks, and in terms of the deformation tolerance of the entire structure in response to outflow and subsidence of the packed earth and sand. There is no guarantee that it will be possible.

In addition, expanded metal unit stacking is very advantageous because the weight of the unit is small, so only a small amount of materials are required to prepare and transport, and the deformation tolerance of the entire structure is large. Stress may be concentrated in a specific unit due to deformation, so to prevent the filling material from flowing out which can cause deformation, carefully select conditions such as selection of filling material, compaction, and use of anti-wicking materials. It is necessary to consider and design.

[Structure of the Invention] The present inventor has conducted research and discovered a new greening earth retaining structure that has greater deformation tolerance and does not concentrate stress, and therefore has higher overall stability, and has completed the present invention. .

That is, the present invention has the following features: (a) A plurality of sheet pile segments each having a sliding joint at the side end and having a bent cross section, each cross section alternately forming a convex portion and a concave portion with a wave shape due to the joint. (b) another sheet pile segment stage arranged above the sheet pile segment stage (a);
With respect to the lower stage, the phase of the waveform is shifted so that the lower end of the sheet pile segment located in the upper tier corrugated convex portion comes into contact with the upper end of the sheet pile segment located in the lower tier corrugated concave portion, (c) the sheet pile segment located in the convex waveform part of the lower stage (b) of the upper sheet pile segment and the sheet pile segment 1 located in the concave waveform part of the lower sheet pile segment stage (a); (d) means for connecting and fixing at the abutting portion; (d) tensioning means having one end fixed to the connecting and fixing means or to the sheet pile segment, with the narrow end extending in the depth direction of the structure; (e) each stage. To provide a sheet pile segment greening earth retaining structure which has a space where vegetation can grow and is stable against inter-level sedimentation, comprising earth and sand packed inside.

The double partition wall construction method using sheet piles is known per se.

However, this construction method is a construction method in which straw plate piles are driven into the ground in the form of a two-car wall, and is merely one form of using sheet piles as plate piles.

The present invention utilizes the characteristic of sheet piles in that adjacent plate piles are connected by a single flexible joint at the side end, while maintaining the basic characteristics of piles in segmented units such as blocks. It is based on the unique idea of creating the possibility of sliding displacement between units. This idea of making the piles driven into the ground into single-segment segments and utilizing the possibility of displacement between segments to provide large deformation tolerance to the entire structure without stress concentration is a completely new idea not found in conventional technology. It's Otsunoderu.

For the sheet pile segment, it is cheaper and more advantageous to cut commercially available steel sheet piles (including lightweight steel sheet piles) into appropriate lengths, or to use steel ingots, steel plates, reinforced concrete, rigid plastics, and xeramics. It is also possible to make the desired shape and dimensions from materials such as the like. Material selection is from cost 1,
This can be done as appropriate, taking into account weight, strength (rigidity, abrasion resistance, impact resistance, etc.).

In order to obtain vegetation space for greening, materials with curved cross sections, such as U-shaped or W-shaped steel sheet piles, are used. The shape and structure of the sliding joints at the side ends are arbitrary and can be appropriately selected from known ones or newly designed.

The segments are interconnected and extend in the horizontal direction so that each cross section alternately constitutes convex and concave portions of the waveform. A plurality of sheet pile segment stages having corrugated vertical wall surfaces thus obtained are constructed, and a vegetation space is obtained by the concave portions formed by the upper sheet pile segments and the convex portions formed by the lower sheet pile segments. For this purpose, the upper sheet pile segment stage and the lower sheet pile segment stage are arranged such that the lower end of the sheet pile segment located in the upper corrugated convex portion abuts the upper end of the sheet pile segment located in the lower corrugated concave valve. , shift the phase of the waveform.

The connection between the sheet pile segment stages is achieved by fixing the connection between the lower end of the upper convex force segment and the upper end of the lower recessed valve segment, which abut each other.

Therefore, adjacent stages N and (N+1) are fixed every other segment. (Segments in N+1> stages are not fixed. Segments in N stages are fixed as segments 1 to (N-1) stages, and segments in stages N+1> are not fixed as segments in (N+2> stages.) Therefore, due to the vertical displacement between segments by the sliding joint, it is possible to change the step height at every other segment between adjacent segment steps, and at every position between segment steps with one step apart. be.

As the connection and fixing means, any known means can be used, such as bolts and nuts, welding, etc.

It is also possible to construct the upper and lower stage segments, which are connected and fixed in advance or are integrally molded, as a unit, and by connecting these units. Further, this connecting and fixing means can be integrated with a tensioning means to be described later.

As the tensioning means, any known means can be appropriately selected and used. As the longitudinal member, a deformed steel bar with threaded joints, an expanded metal plate, a synthetic fiber band, etc. can be used, and as the joining member, an eye bolt, a universal joint, a joint cover, a washer, an L-shaped plate, a nut, etc. can be used. The arrangement of the tension members can be designed as appropriate depending on the purpose, but it is preferable to avoid settling of the filling earth and sand, etc., so as not to impair the tolerance for height changes between the segment stages due to the sliding joints to the sheet pile legmen 1. The recessed sharpeners are arranged so as to facilitate the desired displacement of the steel sheet pile segments accordingly.

In general, all or a portion of the above-mentioned connection fixing means between sheet pile segments 1 is attached to the sheet pile segment 1, which also serves as the connection fixing means, or is located in either the corrugated convex portion or the corrugated concave portion. At each central position of the sheet pile segment or at the lower end of the sheet pile segment located in the corrugated recessed portion, apart from the connection and fixing means, a tension member is arranged.

Depending on the configuration of the target structure, the end of the tension member in the depth direction may be fixed in the same way as above or connected to the inner shrine.
Fix it using f house.

It is advantageous to fill in the earth and sand one stage at a time.

Filling increases the independence of each tier, and also facilitates the subsequent construction of the upper tier and the filling of the upper tier.

Although the normal slope can be designed as appropriate, a steep slope close to upright, for example, 1:0.1 to 1:0.2 is possible.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments illustrated in the accompanying drawings.

[Example 1] A commercially available U-shaped steel sheet pile with a width of 35 cm is cut in the transverse direction to create multiple segments with a length of 80 cm. Drill a bolt hole in the center of one end of each segment.

FIG. 1 shows a perspective view of one embodiment of a double wall structure under construction, near one wall surface. When constructing, first,
Segments (1/1) to (2M/1) are connected laterally at the relative positions shown to form the first stage of segments (1/1 to 2M).
/1). Next, fill with earth and sand to the height directly below the bolt hole at the upper end of the odd-numbered row segment (2n-1/1: n=1 to M) of the first stage of the segment. However, segment 1
Fill in the middle leaving the area near the segment so that the tier does not fall.

Next, the lower ends of the second-stage odd-numbered row segments (2n-1/2: n=1 to M>) are connected to the upper ends of the odd-numbered row segments at the relative positions shown in the figure.The connection is made at one end of the threaded deformed steel bar. are passed through the bolt holes at the upper end of the first-stage segment and the lower end of the second-stage segment, and fixed with nuts.The other part of the steel bar is fixed in the same way on the opposing narrow surface of the double wall (not shown). Next, complete the filling left in the vicinity of the first-stage segment.After that, insert the second-stage even-numbered row segments (2n/2: n=1 to M) between the pairs of odd-numbered row segments at the relative positions shown in the figure using sliding joints. Connect to earth and sand filling, 3rd stage even row segment (2n/3: n=1~
Connect M) and complete filling with earth and sand in the same way.

2 is a plan view of the double wall structure shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line A--A in FIG. 2.

FIG. 4 is a partially enlarged plan view showing the connecting portion between the second stage pigment and the third stage segment shown in FIG. 2 in an enlarged manner.

FIG. 5 is a plan view showing another example of the connecting portion shown in FIG. 4, and FIG. 6 is a side view thereof. In the example shown in Figures 5 and 6, an L-shaped plate (11) is fastened to the segment (10) with bolts and nuts, and a swivel joint (12) and a threaded deformed steel bar (13) are joined to this L-shaped plate (11). There is.

FIG. 7 is a plan view showing another example in which an expanded metal plate (21) is used instead of the threaded round steel bar as the tensioning means in FIG. 4, and FIG. 8 is a side view thereof.

The sacral end (not shown) of this expanded metal plate may be connected and fixed to the segment on the other side of the double R quall in the same manner as shown, or may be fixed simply by friction with the filling earth and sand.

FIG. 9 is a plan view showing another example in which the connection position, connection method, and dimensions of the expanded metal plate to the segment shown in FIG. 7 are changed, and FIG. 10 is a side view thereof. The expanded metal plate (31) is connected to the upper segment (3) which is connected and fixed to each other by bolt nuts (32)
3) and a lower segment (34), the wire clip (35) is connected to the lower end of the lower segment (34). Also expanded metal plate (31
) is the dimension that spans every other segment in the lateral direction.

Figure 11 is a schematic perspective view of an example of an erosion control dam that has a double wall side passage section using tension members shown in Figure 4 and a leaning retaining wall section using tension members shown in Figure 7. It is a diagram.

FIG. 12 is a sectional view similar to FIG. 3, showing a state in which the wall surface is deformed due to sliding between the segments as the filling earth settles. Subsidence of dl at the connection part between the first stage pigment and the second stage segment and the difference between the second stage segment and the third stage segment.
With respect to the sinking of d2 at the connection level with the step segment, displacement due to sliding between the segments occurs independently, allowing wall surface deformation without stress concentration.

[Effect of the invention] As is clear from the above, the present invention segments sheet piles and
Based on the unique idea of making use of the possibility of displacement between segments due to occupancy, this project successfully succeeded in providing a large amount of deformation tolerance to the entire structure without stress concentration.

Furthermore, the slope can be adjusted by appropriately determining the height, width, and depth of the segments. Semi-erect 1:0.
Even steep slopes of 1 to 1:0.2 are possible.

On the other hand, the greening space is horizontal and tap root trees can also grow there.

The present invention achieves such effects and is extremely useful industrially.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the vicinity of one wall of an embodiment of a steel sheet pile leg 1-head double wall structure under construction according to the present invention, and FIG. 2 is a plan view of the structure shown in FIG. 1. 3 is a sectional view taken along line 8-A in FIG. 2. Fourth
This figure is a partially enlarged plan view of FIG. 2, FIG. 5 is a plan view showing another example of the connecting portion shown in FIG. 4, and FIG. 6 is a side view thereof. FIG. 7 is a plan view showing another example of the tensioning means shown in FIG. 4, and FIG. 8 is a side view. FIG. 9 is a plan view showing another example of the tensioning means shown in FIG. 7, and FIG. 10 is a side view thereof. FIG. 11 shows the structure shown in FIG. 4 and the M? shown in FIG. This is a perspective view schematically showing an example of an erosion control dam that has both three structures. FIG. 12 is a sectional view similar to FIG. 3, showing a state in which the wall surface is deformed as the filling earth settles. Figure 2 A-8 Figure 4 Figure 5 Interference Figure 11 Procedural amendment (method) 1. Indication of matter A'1 1986 special revision application No. 15455
No. 3 2. Title of the invention Sheet pile segment greening earth retaining structure 3. Person making the amendment Relationship to the case Patent applicant (shipped on August 25, 1988) 6. Subject of the amendment Engraving of the drawing (no change in content) 7. Contents of the amendment as shown in the attached sheet

Claims (7)

[Claims] (1) (A) A plurality of sheet pile segments each having a sliding joint at the side end and having a bent cross section are arranged so that each cross section alternately constitutes a convex portion and a concave portion of the waveform due to the joints. (b) a sheet pile segment tier with corrugated vertical wall surfaces which are connected and extend horizontally;
b) Another sheet pile segment stage arranged in the upper stage, with respect to the lower stage, the lower end of the sheet pile segment located in the corrugated convex part of the upper stage is the upper end of the sheet pile segment located in the corrugated concave part of the lower stage (C) Another sheet pile segment stage located at the corrugated convex part of the upper sheet pile segment stage (B) and the lower sheet pile segment stage ( (b) A means for connecting and fixing the sheet pile segment located in the corrugated concave portion at the abutting portion of both, and (d) One end is fixed to this connection and fixing means or to the sheet pile segment, and the other end is fixed to the structure. A sheet pile segment greening earth retaining structure that has a space for vegetation and is stable against inter-stage sedimentation, comprising: (e) earth and sand filled inside each stage; thing. (2) The structure described in the preceding item (1), which uses commercially available steel sheet piles cut transversely into appropriate lengths as the sheet pile segments. (3) The structure described in the preceding item (1), in which the connection fixing means (c) and the tensioning means (d) are integrated. (4) The structure described in (1) or (3) above, which uses a threaded deformed steel bar as a tension member. (5) Using an expanded metal plate as a tensile member,
The structure described in the preceding section (1). (6) The previous item (1) was created as a double wall type sabo dam.
Structures described in . (7) The structure described in the preceding paragraph (1), which is a leaning retaining wall.