JPH09279605A - Constructing method of earth retaining or fence and concrete block used for this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent collapse even when a big earthquake occurs or the ground is soft, by a method wherein a vertical pit for the foundation is dug, reinforcing bars are assembled to the height of a fence part, concrete is placed and thereby a foundation part and a pillar-shaped foundation part are integrated. SOLUTION: A consolidated part 11 of a vertical pit for the foundation formed by improving soft ground 10 is constructed at proper intervals in a place where an earth retaining or a fence is expected to be constructed. The vertical pit 1 for the foundation is dug in a consolidated core of the consolidated part 11 of the vertical pit for the foundation by using an earth auger. Next, vertical bars 6 and 7 and horizontal bars 8 are assembled and fitted on the vertical pit 1 for the foundation. Then, a form 3 of an earth retaining part and a form 5 of a fence part are assembled. Subsequently, concrete is placed and, after it is cured, the forms are removed. In this way, a pillar-shaped foundation part and the earth retaining part 2, or the pillar-shaped foundation part, the earth retaining part 2 and a fence part 4, are integrated. According to this constitution, it is possible to construct a structure which hardly collapses even when a pressure is applied to the earth retaining or the fence by an earthquake or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing earth retaining and fences in civil engineering work and to earth retaining blocks and wall blocks used in the method.

[0002]

2. Description of the Related Art Conventionally, when constructing a retaining wall or a fence, as a foundation work, dig into the surface to some extent, lay cracking stone, lay mountain sand, etc. on it, grind it, pour it into concrete, and throw in concrete. Then, formwork is put on this and concrete is thrown in for earth retaining, or earth retaining work is performed by using L-shaped earth retaining block body or inverted T-shaped earth retaining block body for continuous earth retaining work. The construction of the construction may be carried out by building a lightweight block on the earth retaining part, or by constructing the fence integrally with the earth retaining part (of course, reinforcing with a reinforcing bar), or by using an L-shaped earth retaining or retaining structure. The method of constructing the retaining wall and the fence integrally using the wall was adopted. In the method of constructing earth retaining or fences as described above, the depth of the foundation part is limited to a certain extent even in hard ground as well as soft ground, so there are few cases of collapse or collapse due to an earthquake, and even personal injury due to it That is the current situation. In addition, in the case of an L-shaped retaining wall or an L-shaped retaining wall, if the constructed ground is soft, the subsidence of the ground may cause the retaining wall or the retaining wall (fence) itself to eventually collapse, which is dangerous. In particular, after the Great Hanshin Earthquake, improvements in construction techniques for earth retaining and fencing on soft ground have been closed up.

[0003]

In view of the above-mentioned problems in the conventional construction method, in view of the fact that there are difficulties in foundation work for earth retaining and fences, construction work was carried out on hard ground as well as soft ground. It is an object of the present invention to provide a construction method in which a retaining wall or a wall is not collapsed even by a large earthquake, and a retaining block body and a wall block body used for the retaining wall or the fence constructed by the method.

[0004]

SUMMARY OF THE INVENTION The present invention provides a method for excavating a foundation shaft having an appropriate depth and a required diameter at an appropriate interval in the case of hard ground, in a foundation work for earth retaining or fencing, In the soft ground, compacting is performed at an appropriate interval to an appropriate depth, a foundation shaft having a diameter required for the consolidation portion is excavated, and then the height of the ground retaining portion from the bottom of the shaft for the foundation, Or, assemble the rebar upright to the height of the fence, assemble the shaft and the earth retaining section for the foundation or the shaft and the earth retaining section and the wall for the foundation by concrete casting, or pile the lightweight section with the lightweight block. By adopting means for constructing the foundation portion as a columnar foundation portion and integrally constructing the foundation portion and the earth retaining portion or the columnar foundation portion and the earth retaining portion and the wall portion, the columnar foundation portion and the earth retaining portion are further improved. Earth retaining block or columnar Using a fence block body in which a foundation part, a retaining part, and a fence part are integrally formed, a column-shaped foundation part of the block body is inserted and fixed in the excavated foundation shaft, and each block body is fixed. The above-described problem has been solved by adopting a unit that is integrally connected.

[0005]

1 and 2 are explanatory views of a first embodiment of the present invention for constructing earth retaining or fences on a solid ground which does not particularly require consolidation. FIG. It is explanatory drawing which shows the mold 3 of the earth retaining part 2 and the mold 5 of the wall part 4. The ground shaft 1 is excavated using an earth auger at an area and depth required for the ground (the diameter and the depth are determined by the scale of the earth retaining or fence to be constructed). 1 is assembled with a retaining form 3 and a fence 4 is constructed on the retaining 2 by casting concrete, and a fence form 5 is provided. Therefore, shaft 1 for foundation
The depth will be determined as appropriate depending on whether only a retaining wall is to be constructed or a wall is to be constructed. Further, the diameter of the shaft 1 for the foundation (therefore, the diameter of the earth auger used for excavation) is determined by the above-mentioned conditions. At the same time as the assembling work of the formwork 3 and 5, the rebar assembling work is also performed. The vertical bar 6 is built up from the shaft 1 for foundation to the height of the earth retaining part. 2
A vertical streak 7 is built up from the root to the height of the fence 4.

When the work for the shaft 1 for the foundation, the earth retaining form 3, the wall form 5 and the arrangement of the reinforcing bars is completed, concrete is poured and the forms 3 and 5 are removed after curing. The earth retaining or fence as shown in FIG. 5 is completed. Reference numeral 9 denotes a columnar foundation as a constructed foundation.

FIGS. 3, 4 and 6 are views showing a second embodiment of the present invention, showing a method for constructing an earth retaining wall or a fence on soft ground. FIG. 3 shows that the soft ground 10 is excavated with an earth auger to a required depth and prepared in advance. While it is being fed continuously from the auger, it is forcibly fed and compacted. In such a case, a supporting force is generated from the tip of the auger, and the auger rises at that time, so that the auger is pulled up little by little at each time, and the consolidation material is sent to complete the consolidation sequentially. Reference numeral 11 denotes a vertical shaft consolidation ground for foundation (hereinafter referred to as "consolidation ground"). This ground consolidation is applied at an appropriate interval to the site where the earth retaining and fences are to be constructed, and the consolidation core of the consolidation ground 11 is excavated into the shaft 1 for foundation using the auger for the pole, and the same as in the first embodiment. When assembling the rebar and retaining the sill form 3 and the fence 4, the fence form 5 is assembled. Next, concrete is cast, and after curing, the mold is removed and the earth retaining or fence is completed (Fig. 4). When the fence portion 4 is piled up with the lightweight blocks 12, the horizontal streaks 8 are arranged on the earth retaining portions 2 integrally formed on the columnar foundation portions 9 (the vertical streaks are arranged in advance). ) And block construction. The dotted line portion 13 may be constructed by stacking lightweight blocks. Dotted line part 12
Is a lightweight block (Fig. 6). In addition, since there are various softnesses in the soft ground 10, when it is considered that the consolidation of the excavated portion of the shaft 1 for the foundation alone cannot provide the supporting force of the columnar base portion 9 and therefore the supporting force of the earth retaining or the entire fence. As shown in FIG. 7, the periphery of the vertical shaft consolidation part 11 is
As 4, a method of consolidating and strengthening the supporting ground of the columnar foundation 9 may be adopted.

FIG. 8 is a perspective view showing one embodiment of the earth retaining / fence block body 15 used in the present invention. In the case where the retaining block is manufactured and used only as a retaining block, the retaining section 2 'is of course formed at a required height. In the present embodiment, the columnar base portion 9 ', the earth retaining portion 2' and the wall portion 4 'are integrally formed using a mold. The diameter and height of the columnar foundation 9 ', the height and width of the earth retaining portion 2', and the height of the fence 4 'are naturally determined according to the construction purpose, construction ground and environment of the construction site. is there. The arrangement of reinforcing bars (arrangement of reinforcing bars) of each component is the same as in the first and second embodiments. Reference numeral 16 denotes a joint portion, and reference numeral 17 denotes a joint reinforcing-bar insertion hole.

When a fence is constructed using the above-mentioned retaining / fence block body 15, a pillar-shaped shaft 1 is excavated at appropriate intervals by the method shown in the first embodiment or the second embodiment. The required number of the base portions 9 ′ are connected to each other while the base portions 9 ′ are inserted and erected. At this time, mortar or the like is charged and fixed in the gap between the shaft 1 for the foundation and the columnar foundation 9 ′. Length) only. In addition, in the construction for the purpose of retaining only the earth, the height H of the earth retaining portion 2 ′ may be appropriately configured according to the earth retaining work location, and the joint portion 16 and the joint reinforcing hole 17 may also be appropriately formed. Shall be provided. Further, the columnar base portion 9 'is formed as a columnar column. This is because the vertical pile 1 for the foundation is excavated into a cylindrical shape by an auger for a column, so that it is convenient to make the columnar column in construction. It is.

FIG. 9 shows another embodiment of the earth retaining / fence block body 19 used in the present invention. The earth retaining portion 2 'and the wall portion 4' of the above embodiment are made common and used for earth retaining work. The height of the earth retaining portion and the fence portion 20 is also set to a required height according to the construction site, even if it is used for wall construction. The pillar-shaped base portion 9 "is formed as a prism at the lower end of both ends of the soil and fence portion 20, and a joint portion 21 is formed at both ends of the soil and fence portion 20 in a vertical shape. Are connected by a joint reinforcing bar 23 in a joint extension hole provided in the upper extension of the joint, and 24 is a joint hole provided in the earth retaining and wall portion 20 and 25 is a joint reinforcing bar. Reference numeral 26 denotes a beam integrally supporting the prism base 9 "at both ends and the retaining / fence 20. The prism 9", the beam 26, and the retaining / fence 2
Needless to say, a vertical streak and a horizontal streak are arranged at 0, respectively.

When the earth retaining or wall is constructed by using the earth retaining and fence block body 19, the first excavation is performed at the same interval as the interval between the columnar base portions 9 "formed at both ends of the body 19. A prismatic base 9 "is inserted into the shaft shaft 1 shown in the embodiment or the second embodiment, and is continuously installed to construct a retaining wall or a wall. At this time, the two base members 9 ", 9" which are connected to each other are integrally formed by two prismatic base members 9 ", 9".
Connect firmly with 4 mag. Further, the gap between the prism base portion 9 "and the shaft 1 is filled with mortar 27 or the like.

[0012]

As described above, according to the present invention, when constructing earth retaining or fences, the foundation method is completely different from that of the conventional method. In this case, the ground is compacted at the required intervals to the required depth, and the ground is improved to a solid ground. And the earth retaining part or columnar base part and the earth retaining part and the fence part are integrally formed, and each part of the earth retaining part or the fence is strongly reinforced by a reinforcing bar. Unlike shallow horizontal foundations that are horizontally long, even if a vertical earthquake or a rolling pressure due to a strong earthquake, etc. is applied to the earth retaining or fence, the columnar foundations are erected vertically in the strong ground and vertically deep. That the earth retaining and fences do not collapse easily It exhibits a large effect. Also, the consolidation part in the soft ground is formed from the ground surface to the required depth and extremely densely within the required range and has a rock-like solidity. In the course of the process, the soft ground will not be permanent, so there will be no significant land subsidence, and there will be a great effect that the earth retaining and the slope of the fence will never occur. Also, when constructing earth retaining and fences using the construction and construction of earth retaining block or wall block or earth retaining and wall block, the construction efficiency is good and the same formwork can be used for standard production. Therefore, it has the effect of being economical.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a state in which a foundation shaft, an earth retaining formwork, and a wall formwork are formed and a reinforcing bar is arranged when constructing an earth retaining or fence on solid ground.

FIG. 2 is an explanatory sectional view showing a state in which concrete is put into a formwork and a shaft for a foundation shown in FIG.

FIG. 3 is a cross-sectional explanatory view showing a state where a soft ground is compacted, a shaft shaft for a foundation is excavated in the ground, and an earth retaining form and a wall form are assembled and reinforcing bars are arranged.

FIG. 4 is an explanatory cross-sectional view showing a state where the concrete is put into the formwork and the shaft shown in FIG. 3 and the mold is removed after curing.

FIG. 5 is an explanatory front view of FIG. 2;

FIG. 6 is an explanatory front view of FIG. 4;

FIG. 7 is an explanatory diagram of additional consolidation.

FIG. 8 is an explanatory perspective view of an embodiment of an earth retaining / fence block body (round pillar base).

FIG. 9 is a perspective explanatory view showing another embodiment of the earth retaining / fence block body in which two bodies are connected (a prism base).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation shaft 2 Earth retaining part 2 'Earth retaining part 3 Earth retaining part formwork 4 Fence part 4' Fence part 5 Fence part formwork 6 Vertical streak (arranged in foundation shaft) 7 Vertical streak (Soil) 8 Horizontal bar (rebar) 9 Column foundation (foundation) 9 'Column foundation (foundation) 9 "Square pillar foundation 10 Soft ground 11 Vertical shaft consolidation part 12 Lightweight block Reference Signs List 13 Depth of influence of consolidation of columnar base part 14 Additional consolidation part 15 Wall block 16 Joint part 17 Reinforcing hole for joint 18 Reinforcing bar for joint 19 Soil and fence block body 20 Soil and fence 21 Joint part 22 Bolt hole for joint 23 Joint Bolt 24 joint hole 25 joint reinforcing bar 26 beam 27 mortar 28 hard ground H height of earth retaining part 2 ′

Claims (6)

[Claims] 1. A foundation shaft is excavated at an appropriate distance and a required depth at a construction site of an earth retaining wall or a wall, and the ground shaft is provided from the bottom of the vertical shaft to the height of the earth retaining portion or the earth retaining portion. Reinforced bars are erected up to the height of the fence to be built on the foundation, and the vertical shaft and earth retaining part for the foundation, or the vertical shaft and earth retaining part for the foundation and the fence part are columnar foundation parts by inserting concrete. A method for constructing an earth retaining or fence in solid ground which does not require consolidation reinforcement of the ground, characterized in that the earth retaining portion or the earth retaining portion and the fence portion are integrally formed on the foundation portion. 2. The fence construction method according to claim 1, wherein the fence is made of a lightweight block. 3. The earth retaining or fence construction site, the soil is consolidated to a required depth at appropriate intervals, a vertical shaft for foundation is excavated in the consolidation portion, and the foundation portion is constructed in the tunnel. The method for constructing a soil retaining wall or a fence in soft ground according to claim 1, wherein 4. On soft ground, the ground is compacted at appropriate intervals to an appropriate depth, and in the consolidation portion, or on hard ground that does not require consolidation, directly to the appropriate depth at appropriate intervals. A shaft is excavated, and on the other hand, a retaining block body composed of a pillar-shaped foundation and a retaining part integrally formed, or a pillar-shaped foundation, a retaining part and a fence configured integrally. An earth retaining or fence characterized by using a fence block body formed as described above, wherein a columnar foundation formed in the block body is erected and fixed to the foundation shaft, and the block body is continuously provided. Construction method. 5. A method for constructing a retaining structure according to claim 4, wherein the method comprises a column-shaped foundation portion which is erected and fixed to a shaft for shafts, and a retaining portion integrally formed with the column. Earth retaining block used for. 6. A pillar-shaped base portion which is erected and fixed to a vertical shaft for foundation, a earth retaining portion integrally formed with the portion, and a wall portion integrally formed on the earth retaining portion. A fence block body used in the fence construction method according to claim 4, wherein the fence block body is formed.