JPH0216209A - Construction of waterway in soft ground and block therefor - Google Patents

Abstract

PURPOSE:To easily and economically construct a waterway of blocks by a method in which side blocks covering an excavated trench of an inverted triangular cross section are integrally connected with vertical parts driven into the bottom of the trench. CONSTITUTION:A trench of an inversed triangular cross section is excavated in a place where a waterway is to be constructed in soft ground. Concrete side blocks 1 covering the trench are set, and vertical parts 5a are driven into the holes 2 formed at a fixed interval in the trench bottom portion of the block 1. The blocks 1 are integrally connected with the parts 5a to construct a waterway. The waterway can thus be easily and economically constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a waterway construction method for providing a stable drainage channel on soft ground with low bearing capacity and a waterway block used therein.

<Conventional technology> Even if an open channel is constructed in an attempt to establish an open channel in extremely soft ground such as unconsolidated alluvium, reclaimed land, or buried soil, it is difficult to maintain the channel due to landslides and subsidence. In this case, sheet piles (21) are generally installed on both banks as shown in Figure 11.
(2]), place a capstone (22) on top of it, remove mud, etc. inside, and form a waterway (23). It is constructed using the so-called sheet pile method. In this example, even with tie rods and stand-up, there is little effect, so the structure is self-supporting, and for this purpose long sheet piles (21) (21) are driven into both sides.

<Problem A to be solved by the invention> This construction method requires high-strength and long sheet piles and is not easy to construct.Moreover, even after the construction is completed, there is a risk of natural ground subsidence and unevenness of the structure due to overload. In many cases, deformations were observed, which not only made them unstable, but also caused many problems in maintenance and management.

The present invention has developed a new construction method to replace the above-mentioned construction using sheet piles, with the aim of reducing the amount of materials and making construction easier.

This is an attempt to eliminate concerns about the stability of the construction after completion and obstacles to maintenance and management.

Means for Solving the Problems> Therefore, in the present invention, rather than improving the conventional TM culvert or sheet pile construction method, it is based on a completely new idea.

Both the left and right sides are excavated at a gentle slope toward the deepest part of the center, changing the sand if necessary depending on the soil quality, to form a channel cross section of II8 inverted triangle shape or inverted trapezoid shape. death,
Next, we immediately poured concrete of the present invention onto the slopes of both offices! - The side plates were laid using waterway blocks made of steel or by hammering, and were integrated with the concrete side plates from the head f and the front pipes to form a waterway that was successively installed.

Concrete blocks to be applied to waterways with a gentle slope and an inverted triangular cross section have left and right side plates (1) (1) of a predetermined length formed in an inverted triangular or inverted trapezoidal shape, and a vertically cast material (
6 (2) for driving in 5a) is drilled (it is a construction).

Furthermore, this channel block has a structure in which the side plates (1) (]) are separated at the bottom to form a split edge (3), and the split edge (3) is provided with fastening means (4). Make the 1P1 edge (3) protrude to the lower blade and anchor & (5
The water channel block b) can achieve one object of the present invention.

<Function> The channel block of the present invention allows for asss on the slopes of both banks.
By forming a triangular waterway cross section.

The entire structure is an integrated lightweight waterway, and since it has a triangular bottom shape, it has a sticky structure as it tumbles onto muddy soil.

This channel is resistant to damage caused by external forces.

Furthermore, it is stable and does not cause deviation or deformation due to surrounding mud.

The vertical driving members (5, , ) used have the function of regulating the sinking direction of the waterway formed by the waterway block of the present invention.

<Example> Embodiments of the present invention will be described in detail below with reference to the drawings.

The present invention involves excavating the construction width of a waterway in soft ground in an inverted triangular shape,
A concrete side plate is provided that slopes from both left and right banks toward the deepest part of the center, and vertical pouring material is driven almost vertically into the soft ground at the center of both F ends, and its head is integrated with the concrete side plate from both banks. In this way, the waterways are constructed in a sequential manner.

Figures 1 and 2 show the first embodiment.
@ is a vertical sectional view showing the construction state, and FIG. 2 is a plan view thereof. This example is for a small waterway, where the left and right side plates (+) (1) of a predetermined length are combined at the bottom to form a reverse pressure angle shape.
A hole (2) is drilled in its bottom. A vertical driving material (5a) is driven into this hole (2) to stabilize it.

3 and 4 show a second embodiment of the present invention,
Figure 3 is a longitudinal sectional view showing the construction state.

FIG. 4 is a plan view thereof. This waterway was constructed by excavating both J slopes at a gentle slope, and immediately installing left and right concrete side plates (1) (1) with vertical ribs (6a) and horizontal ribs (6b) on the back. Then, temporarily tighten both ends, that is, the dividing edges (:1) (:l), with the layer material in between, then remove them one by one, drive the vertical driving material (5a), and insert it through the insertion hole in the head of the hole on both sides. Connect the embedded metal fitting (7) at the end of the plate with iron fi? 1 (8) to connect and fix the connection, and then add concrete to this part.
1-(9) was filled and the surface was leveled.

Figure 5 shows a case where the slope slopes on both banks are formed to be somewhat steep, and a turned edge (10) is provided at the lower end of the side plate (1) to form a pole l-6, and a connecting bolt ( It is a ti'J construction in which the side plates on both sides are connected together with vertical driving materials by 11). The construction method is the same as in the previous example.

Figure 6 shows a case where the slopes on both banks are even steeper and the heights of the left and right banks are different.The side plate (1) is reinforced by vertical and horizontal ribs (6a) (Gb), The head of the material (5a) is also made larger, and furthermore, the upper part is reinforced with hori-Jori-zome (12).

7. In [1], the lower blade of the split edge (3) is made to protrude as an anchor edge (5b), and instead of using the vertical driving material (5a) used in the previous examples, it can be attached to the lower part by simply aligning it. This is an example in which a portion having the same function as the vertical implant material (5a) is formed.

Figures 8 to 10 show the front 2L! Side plate (1
) is shown in a cross-sectional view in the waterway extension direction, and shows the method of joining the side plates in contact with v4. As shown in these figures, the connection method is to simply butt the side plates (1) in the waterway extension direction and connect them with the side plate rib connection bolts (13).
Figure 8),! [Fig. 9] In the example shown in Fig. 10, a notch is formed in both ends and a U-shaped connecting fitting (15) is made. )
After pouring the joint mortar (1G), it is made flat.

In addition to the examples shown so far, there are various ways to connect the divided edges (3) of the side plates (1), and ways to connect adjacent side plates (1), etc.
You can do this as you like, such as driving them closely together like sheet piles, spacing them out, or using circular objects like wood or steel pipes. If not, it is optional to provide ribs on the side plates inside the flow path.

Included in the present invention.

In the examples, the initial waterway excavation has only been briefly mentioned, but in the waterway construction method of the present invention, it is possible to simultaneously construct a structure that takes advantage of the characteristics of the materials using a dedicated machine, which further enhances the present invention. It is hoped that it will be useful.

Possible options include subsidence construction by increasing or decreasing the loading wind of Inuhashiri (17), mud discharge through suction holes in the side walls and bottom, etc.

<Effects of the Invention> The present invention is a method of constructing a waterway on soft ground and a waterway block used therein as detailed above.

The benefits include a significant saving in materials used in construction, a reduction in construction costs due to simplified construction, a shortened construction period, stability of the waterway and surrounding area, and easier maintenance.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the 1''A embodiment of the present invention, and Fig. 2 is a plan view thereof. Fig. 3 is a longitudinal cross-sectional view of the second embodiment of the present invention, and Fig. 4 is a longitudinal cross-sectional view of the second embodiment of the present invention. FIGS. 5 to 7 are longitudinal cross-sectional views of other embodiments. FIGS. 8 to 1θ are cross-sectional views of the side plate in the water channel extension direction. FIG. This is a longitudinal cross-sectional view of the sheet pile construction method. (1) Side plate (2) Hole (3) Division 4m! (5o) Vertical driving material (5b) Anchor & (6a) Vertical rib (6b)
Horizontal rib (7) Embedded metal fitting (8) Connecting reinforcing bar
(9) Concrete 1 to (10) Return edge
(11) Connection bolt (13) Side plate rib connection pole 1-(1
4) Differential bars (15) U-shaped joints (16) Joint mortar or more

Claims (1)

[Claims] 1. Excavating the width of the waterway construction in soft ground with an inverted triangular cross section,
Concrete side plates are provided that slope from both left and right banks toward the deepest part of the center, and vertical pouring materials are driven almost vertically into the soft ground at the center of both lower ends, and their heads are integrated with the concrete side plates from both banks. A waterway construction method on soft ground characterized by constructing a waterway in series. 2 Concrete blocks that are applied to waterways with a gentle slope and an inverted triangular cross section, consisting of left and right side plates (1) (1) of a specified length.
) is formed into an inverted triangular or inverted trapezoidal shape, and a hole (2) for driving a vertical driving material (5) is bored in the bottom. 3. A waterway block according to claim 2, wherein the side plates (1) (1) are separated at the bottom and have a dividing edge (3), and the dividing edge (3) is provided with fastening means (4). 4. A water channel block in which the divided edge (3) according to claim 3 is made to protrude from the lower blade to serve as an anchor edge (5b).