JPH0369412B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to the construction of filling earth and sand in prefabricated steel box-shaped retaining walls used for mountain retaining walls, dumping site retaining walls, stockyard retaining walls, etc. It is about law.

[Prior art]

Conventionally, the construction method for prefabricated steel box-shaped retaining walls filled with earth and sand is to erect and fix a steel front plate across a number of steel front supports placed at intervals in the left and right direction. At the same time, a steel rear face plate is erected and fixed across the steel rear struts arranged at intervals in the left and right direction, and a steel partition plate is erected and fixed across the front and rear struts. Filling earth and sand, such as locally generated soil, is put into each of the many box-shaped interiors made up of a rear panel and a partition plate, and after leveling the filling earth and sand manually, the filling earth and sand are placed using a tamper or a rammer. A compaction method is known.

However, in the case of this construction method, it is necessary to perform the filling work, leveling work, and compaction work independently for each box-shaped interior, and it is particularly difficult to perform compaction using a traveling compaction machine. Since this is not possible, there is a problem of poor construction efficiency.

[Purpose and structure of the invention]

The purpose of this invention is to provide a construction method for compacting earth and sand in a prefabricated steel box-shaped retaining wall that can advantageously solve the above-mentioned problems. A steel front plate 2 is erected and fixed across a large number of steel front columns 1 arranged at intervals in the direction, and is also erected and fixed across a number of steel rear columns 3 arranged at intervals in the left and right direction. A steel rear plate 4 is erected and fixed, a first stage steel connecting member 5 is erected and fixed across the front column 1 and the rear column 3, and between the front plate 2 and the rear plate 4, After filling the first stage filler earth and sand 6 to a level higher than the upper edge of the connecting member 5, the filler earth and sand 6 is compacted by a traveling compaction machine 7, and the first stage column connecting filler earth and sand is compacted. A compacted layer is formed, and then the same steps as described above are carried out, such as erection and fixing of steel connecting materials, filling of the filling with earth and sand, and compaction of the filling with earth and sand using the traveling compaction machine 7 as many times as necessary, and the second and subsequent stages are The present invention relates to a construction method for compacting earth and sand in a prefabricated steel box-shaped retaining wall, which is characterized by sequentially configuring layers of earth and sand compacted by connecting columns.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

When implementing this invention and constructing a prefabricated steel box-shaped retaining wall with filled earth and sand, first, as shown in Figures 1 to 3, a trench is dug in the ground in front of the slope. A chestnut stone layer 9 is provided on the bottom surface of 8, and the chestnut stone layer 9
An earth and sand layer 10 is provided on top of the earth and sand layer 10, and on top of the earth and sand layer 10, a large number of steel first stage front supports 1 each having an L-shaped steel front support member 11 fixed to the lower end with bolts are installed.
A large number of steel first stage rear struts 3 are placed side by side at regular intervals in the left and right direction, and an L-shaped steel rear support member 12 is fixed to the lower end with bolts.
A are placed side by side at regular intervals in the left and right direction, and a front plate 2 made of corrugated steel plate is erected across the adjacent first stage front struts 1A and fixed with bolts 13, and Rear strut 3A for 1st stage
A rear plate 4 made of a corrugated steel plate is erected across the bridge and fixed with bolts 14, and a connecting member made of a corrugated steel plate is installed across the first stage front strut 1A and the first stage rear strut 3A. 5 and bolt 1
Fix by 5. Each support at the longitudinal end of the retaining wall has an L-shaped cross section, but each of the other supports has a pair of L-shaped cross sections.
A double L-shape is constructed by overlapping and bolting the support units 16 having a letter-shaped cross section.

Next, between the front plate 2 and the rear plate 4, a first
Filling earth and sand 6 for the tiers is charged and filled to a level slightly higher than the upper edge of the connecting member 5, and the upper surface of the filling earth and sand 6 is leveled, and also between the rear plate 4 and the slope 17. , the backfilling soil 18 is charged to almost the same level as the first stage filling soil 6, and then a traveling compaction machine 7 such as a road roller or tire roller is placed on the top of the filling soil 6, and the By running the traveling compaction machine 7 continuously over almost the entire length of the filling earth and sand 6 in the steel box-shaped retaining wall and compacting the earth and sand 6, the earth and sand compaction for the first stage column connection is achieved. Constitutes a hardened layer.

Next, as shown in FIG. 4, the first stage front strut 1
A and the upper end of the first stage rear strut 3A, the second stage front strut 1B and the second stage rear strut 3B,
The front plate 2 as described above is constructed across the steel joint plate 19 and the adjacent second stage front struts 1B and fixed with bolts, and is connected to the adjacent second stage rear struts 1B. 3B, the rear plate 4 as described above is installed and fixed with bolts, and the second stage front support 1B and the second
A second stage steel connecting member 20 made of a corrugated steel plate is constructed across the stage rear column 3B and fixed with bolts.

Next, the filling soil 21 for the second stage is placed between the front plate 2 which is installed and fixed to the front column 1B for the second stage and the rear plate 4 which is installed and fixed to the rear column 3B for the second stage. It is filled to a level slightly higher than the upper edge, and the upper surface of the filling soil 21 is leveled, and also between the slope 17 and the rear plate 4 which is installed and fixed on the second stage rear support 3B. The backfilling soil 18 is charged to almost the same level as the filling soil 21, and then the traveling compaction machine 7 is placed on the top surface of the filling soil 21,
By running the traveling compaction machine 7 continuously over almost the entire length of the filling earth and sand 21 in the steel box-shaped retaining wall and compacting the filling earth and sand 21, the filling earth and sand connected to the second stage pillars are formed. Constitutes a compaction layer.

Thereafter, in the same manner, the front and rear columns are added, the front plate and the rear plate are erected and fixed to the added front and rear columns, and the connecting material is erected and fixed to the added front and rear columns. Then, filling the filling with earth and sand to a level higher than the upper edge of the connecting member and compacting the earth and sand with the traveling compaction machine 7 are repeated as many times as necessary, and the The pillars are connected to form a compacted layer of earth and sand.

In the case of the above embodiment, the front column 1 and the rear column 3 are constructed by connecting a plurality of vertically divided columns with a joint plate 19 and bolts. Front strut 1
and rear strut 3 may also be used. Further, the connecting members 5, 20 may be steel rods with fixing nuts screwed onto both ends, and the steel rods may be inserted into brackets fixed to the columns and fixed with nuts.

Furthermore, one front plate and one rear plate may be constructed and fixed to each of the front and rear columns of one stage, or a plurality of front plates and two or more plates may be installed and fixed to each of the front and rear columns of one stage. The rear plates may be arranged and fixed so that their upper and lower parts partially overlap.

〔Effect of the invention〕

According to this invention, a steel front plate 2 is constructed and fixed across a large number of steel front supports 1 arranged at intervals in the left-right direction, and a large number of steel front supports 1 are arranged at intervals in the left-right direction. A steel rear plate 4 is erected and fixed across the manufactured rear column 3, a steel connecting member 5 for the first stage is erected and fixed across the front column 1 and the rear column 3, and the front plate 2 and the rear plate are erected and fixed. 4, the first-stage filling earth and sand 6 is filled to a level higher than the upper edge of the connecting member 5, so that there are no protrusions on the top surface of the filling earth and sand 6 filled in the steel box-shaped retaining wall. Therefore, a traveling rolling compaction machine 7 with high compaction efficiency is run over almost the entire length of the packed earth 6 inside the steel box-shaped retaining wall.
The filling earth and sand 6 can be compacted with high efficiency, and after forming the first stage pillar-connected filling earth and sand compaction layer in this way, the same steel connection erection fixing and filling earth and sand filling as described above are carried out. and traveling rolling compaction machine 7
The filling earth and sand compaction is repeated as many times as necessary to sequentially form the second and subsequent column connecting filling earth and sand compaction layers, so that the front column 1 and the rear column 3 are
The packed earth and sand inside the steel box-shaped retaining wall is moved from the bottom to the top using a traveling rolling compaction machine 7 with high compaction efficiency while sequentially connecting them from the bottom to the top using steel connecting members. The effect is that compaction can be successively carried out with high efficiency.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic longitudinal sectional front view showing the state in which the first stage of packed earth is being compacted, and Fig. 2 is a prefabricated steel construction. A plan view of the box-shaped retaining wall; Fig. 3 is a partially cutaway plan view showing an enlarged portion of the wall; Fig. 4 is a schematic longitudinal section showing the state in which the second stage of filling soil is being compacted. It is a front view. In the figure, 1 is a steel front strut, 1A is a front strut for the first stage, 1B is a front strut for a second stage, 2 is a steel front plate, 3 is a steel rear strut, and 3A is a first stage front strut. 3B is the rear support for the second stage, 4 is the steel rear plate, 5 is the steel connecting material for the first stage, 6 is the filling earth and sand for the first stage, 7 is the traveling rolling compaction machine, 11 1 is a steel front support member, 12 is a steel rear support member, 16 is a support unit, 18 is backfilling soil, 19 is a steel joint plate, 20
2 is a steel connecting material for the second stage, and 21 is a filling earth and sand for the second stage.

Claims (1)

[Claims] 1. A steel front plate 2 is erected and fixed across a large number of steel front columns 1 arranged at intervals in the left-right direction, and a large number of steel rear columns 3 are arranged at intervals in the left-right direction. The steel rear plate 4 is erected and fixed across the front column 1 and the rear column 3, and the first stage steel connecting member 5 is erected and fixed between the front plate 2 and the rear plate 4. After filling the first stage filler soil 6 to a level higher than the upper edge of the connecting member 5, the filler soil 6 is compacted by a traveling compaction machine 7, and the filler soil for connecting the first stage pillars is formed. A compacted layer is formed, and then the same steps as described above are carried out, including the erection and fixing of steel connecting materials, filling with earth and filling, and compacting with earth and earth using the traveling rolling compaction machine 7 as many times as necessary.
A filling earth and sand compaction construction method for a prefabricated steel box-shaped retaining wall, which is characterized by sequentially configuring a filling earth and sand compaction layer that connects columns after stages.