JP2794647B2 - Dam structure and dam construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dam structure and a method for constructing the dam structure,
In particular, it relates to dams in which industrial waste is buried and dam construction methods.

[0002]

2. Description of the Related Art Although industrial waste is increasing year by year, suitable places for disposing of it in large quantities are decreasing. In addition, harmful industrial wastes must be detoxified and safely dumped.

On the other hand, the construction of a dam requires a large amount of cement, which requires enormous construction costs, as well as a large amount of mortar and concrete to produce and transport a large amount of batcher plants and cranes. Led to an accident. These concerns are of further concern due to the tendency to build many diversifying dams such as snow dams, sediment removal dams, volcanic dams, and garbage disposal dams.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to safely treat a large amount of the above industrial waste and to reduce the amount of cement and aggregate used for the dam embankment volume, thereby increasing the economic effect and increasing environmental problems. To provide a dam and a dam construction method that solves all at once.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and its gist is to provide a base concrete laid at a predetermined height between a riverbed and both right and left banks, and a base concrete at each of the upper and lower sides of the base concrete. And the retaining wall concrete on the upstream and downstream surfaces juxtaposed at predetermined intervals, and the solidified mixture of the industrial waste and the hardener packed in the recess formed by the base concrete and the retaining wall concrete on the upstream and downstream surfaces. ,
There is a dam consisting of a top-end concrete which is cast on the upper part of the mixed hardened material and is sealed. Here, industrial waste refers to concrete waste such as excavated earth and sand and demolition of buildings in urban areas.
Block and the like . In addition, harmful substances and / or harmless substances may be included in industrial waste,
Harmful ones can be mixed with concrete or buried underneath in the center of the dam and harmless ones on the riverbed upstream.

Another gist of the present invention is a foundation excavation step of excavating a riverbed and a right and left bank, a base concrete placing step of placing concrete over the riverbed and both right and left banks in the foundation excavation step, and a base concrete Concrete wall placing step above the upstream side and the downstream side of the concrete wall, and an industrial waste charging step of charging the industrial waste into a recess surrounded by the base concrete and the upstream and downstream side retaining wall concrete And a hardening material casting step of casting and mixing a hardening material into the industrial waste from a hardening material filling pipe disposed inside each of the upstream and downstream retaining walls, and mixing the industrial waste and the hardening material And a step of placing a top-end concrete on the recessed portion. The mortar is mixed with the industrial waste by alternately performing the industrial waste inputting step and the mortar placing step, and the mortar is transferred every 3 m, for example.
In addition, it is conceivable to lay mortar by arranging a main pipe and a branch pipe for mortar laying inside each of the upstream and downstream retaining wall concrete, and laying and burying.

[0007]

[Function] Base excavation is carried out on the riverbed and both right and left banks, and base concrete is poured. A predetermined interval is provided between the upstream side and the downstream side on the base concrete, and the retaining wall concrete on the upper and lower surfaces is cast. After that, industrial waste is put into the concave portion surrounded by the base concrete and the retaining wall concrete, and a hardening material such as mortar is put into this to make a mixed solidified product. Furthermore, the top concrete is poured on top of the mixed solidified material to bury the mixed solidified material. Grout is injected into the horizontal and vertical concrete seams to create a dam. By distinguishing industrial waste from harmful and harmless substances, harmful substances are buried in the above dam, and harmless substances are mixed with concrete placed on the riverbed upstream of the dam, or injected into the lower part of the concrete. It can also be buried.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a dam structure and a dam construction method according to the present invention.

As shown in FIGS. 1 to 3, as a dam structure, a base concrete 3 is laid at a predetermined height between a riverbed 1 and left and right banks 2 serving as dam sites, and upstream and downstream of the base concrete 3. Reinforced concrete retaining walls 4 and 5 on the upstream and downstream surfaces are arranged side by side at predetermined intervals on both sides of the side. In this manner, the recess 6 is formed by the base concrete 3 and the upper and lower retaining wall concretes 4 and 5 provided on the upper part thereof, and whether the recess 6 is merely industrial waste or originally a harmful substance. The harmful substance 7 from which the harmless substance has been removed is separately charged. The mortar 8 is introduced from both the concrete walls of the industrial waste 7 in the concave portion 6 and, if necessary, from the upper side.
When the size is larger, the waste enters the gaps of the industrial waste and is mixed therein, and these are solidified as a mixed solidified material to form a filling material for the dam. On the upper part of the filling material, this is sealed and the top concrete 9 is cast over the retaining wall concretes 4 and 5 on the upstream and downstream surfaces. On the vertical and horizontal joint surfaces of the concrete dam, grouting is performed on the horizontal joint and the vertical joint of the levee so that the harmful substances do not flow out.

The upstream riverbed 10 of this dam
In the conventional method, harmless industrial waste can be buried in the lower part and processed in large quantities.

Next, a method for constructing a dam according to the present invention will be described.

[0012] First, a temporary drainage channel is provided separately from a normal river flow to divert water. Then, foundation excavation is performed on the riverbed and both banks, and a base concrete 3 of about 3 m of reinforced concrete is constructed. In addition, foundation treatment such as consolidation grouting or curtain grouting is performed on the base concrete, and the inside is vertically perpendicular to the upstream and downstream surfaces at predetermined intervals, and the outside is the slope, and the trapezoidal retaining wall concrete 4, 5 is repeated by repeatedly casting and hardening, and while moving the movable formwork, concrete is transferred every 3 m.

[0013] Industrial waste is put into a concave portion having a vertical cross section and an inverted trapezoidal cross section sandwiched between the base concrete 3 thus formed and the retaining wall concrete on both sides. The input amount of this industrial waste can secure a waste capacity of about 40,000 m ³ when, for example, constructing a small or medium-sized hollow gravity type concrete dam.

[0014]

(Equation 1)

By constructing the dam in the mountainous area, the industrial waste 7, which had been difficult to treat conventionally, can be converted into a medium-sized hollow gravity concrete dam of 40,000 m ^3.
It will be a waste disposal site for waste disposal.

In order to put the industrial waste 7, dumping by the dump truck 13 from the concrete slopes on the left and right shores will lead to the waste being guided by the retaining wall concrete on the upstream and downstream surfaces (guide wall effect) and the base concrete. The waste is guided (sliding effect) by the above, and safe dumping can be performed.

Next, main pipes 12 for casting mortar and branch pipes (not shown) from the main pipes are installed vertically and horizontally at predetermined intervals inside each of the upstream and downstream retaining wall concretes. After about 3 m of the waste 7 has been charged, mortar is poured. The poured mortar is hardened by filling the space between the industrial wastes 7 without any gap by its own weight. The alternate charging of the industrial waste 7 and the mortar 8 is performed by repeatedly laminating about every 3 m after solidification.

Further, the upper part is hung over the upper part of the retaining wall concrete on the upstream and downstream sides and the top concrete 9 is struck so that the solidified mixture of the industrial waste 7 and the mortar 8 becomes the filling material of the dam. Set up.

After the top concrete 9 has been cast, grouting is performed from a grout injection pipe (not shown) piped to the transverse section of the dam in the vertical and horizontal joints of the concrete in order to integrate the concrete dam. Secure.

The industrial waste 7 includes harmless waste, waste oil, waste acid, waste alkali, etc., such as Hg, Cd, Pb and o.
-P (organic phosphorus compound), Cr, As, CN, O-Cl
(Organic chlorine compounds), those containing PCB, Cu, Zn, F, etc. are classified as harmful substances determined according to the standards relating to the treatment of industrial waste. Therefore, the above-mentioned filling is enclosed as harmful industrial waste, harmless industrial waste is put into the riverbed 10 upstream of the dam, and concrete and rubble are poured and poured from above. At the same time as the input of the industrial waste on the upstream side, or separately from this, the commutation of the running water at the beginning of construction is returned to the original flow, and the dam is flooded.

[0021]

According to the dam structure of the present invention, what used to require a large-scale disposal site for industrial waste is effectively used as a filling material for dams, which are expected to be various and diverse in the future. Therefore, the dual effect of reducing the number of facilities at the disposal site and reducing the amount of materials such as cement to form a dam can be obtained.

Further, the dam structure of the present invention is characterized in that the filling of industrial waste is completely covered by base concrete, retaining wall concrete on the upstream and downstream sides, and top concrete.
Filling the mortar after dumping the industrial waste to mix them into an integrated solidified material and to prevent harmful industrial waste from leaking from the vertical and horizontal joint surfaces of the concrete dam By performing grouting at the joint, detoxification of industrial waste is ensured to ensure safety.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a dam structure according to the present invention, which is partially longitudinally cut.

FIG. 2 is a longitudinal sectional view of a dam main body section taken along the line AA in FIG. 1;

FIG. 3 is a longitudinal sectional view of a dam main body as a BB section in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 riverbed 2 left and right banks 3 base concrete 4,5 retaining wall concrete 6 recess between base concrete and retaining wall 7 industrial waste 8 mortar (hardening material) 9 top concrete

Claims (2)

(57) [Claims] 1. A base concrete laid at a predetermined height between a riverbed and both right and left banks, a retaining wall concrete on an upper and a lower surface arranged side by side at predetermined intervals on the upper and lower sides of the base concrete, and the base concrete. It consists of a solidified mixture of industrial waste and hardening material filled in the recess formed by the retaining wall concrete on the upstream and downstream faces, and a top-end concrete that is cast on the upper part of the mixed hardened material and sealed. Dam structure. 2. A foundation excavation step of excavating a riverbed and left and right banks, a base concrete placing step of placing concrete over the riverbed and both right and left banks in the foundation excavation step, and an upstream side and a downstream side of the base concrete. An industrial waste inputting step of inputting industrial waste into a recess surrounded by the base concrete and the upstream and downstream retaining wall concrete, A hardening material casting step of casting and mixing hardening material into the industrial waste from a hardening material filling pipe disposed inside the separated retaining wall, and a hardening material casting process into a recess in which the industrial waste and hardening material are mixed The construction method of the dam including the top end concrete placing process.