Underwater foundation mound protection net

Abstract

To provide a method and a system of operation management of construction vehicles that minimize inconvenience to local residents in travel routes due to transportation of a large number of construction vehicles and traffic congestion. (*) To provide an underwater foundation mound protection net that enables stable product quality, significant reduction in transportation costs, significant labor savings in on-site work, and further reduction in on-site assembly costs and overall construction costs.SOLUTION: A number of geofences A, B, C, D, E using GNSS position information are set at intersections a, b, c, d and a congestion predicted location e on a road connecting a location x of a ready-mixed concrete plant and a location y of a construction site. Each time a ready-mixed concrete truck 2 passes through each geofence A, B, C, D, E, entry and entry / exit points in time of each ready-mixed concrete truck 2 to / from the geofences A, B, C, D, E are transmitted to a data management server of a host computer 1 and stored. Based on the data stored in the data management server, a congestion situation and an interval between the ready-mixed concrete trucks 2 at a driving position based on a position and a driving speed of each ready-mixed concrete truck 2 are calculated. Based on these calculation results, instructions are issued to each ready-mixed concrete truck 2 to adjust the driving speed or to change a route. (*) An underwater foundation mound protection net is constructed of an outer frame body and a chain or wire arranged inside the outer frame body for preventing movement of foundation riprap, and is laid on an underwater foundation mound constructed by placing a large amount of riprap. The outer frame body is constructed of a pair of outer frame main body portions arranged opposite each other and a plurality of outer frame main body connecting portions arranged between the outer frame main body portions and connecting the outer frame main body portions to each other.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an underwater foundation mound protection net that is laid on top of underwater foundation mounds constructed by dumping large amounts of riprap as the foundations of bridges, breakwaters, revetments, etc., to protect the riprap deposited as the underwater foundation mound from being washed away by strong waves or water currents, etc. In particular, it enables stabilization of product quality, significant reductions in transportation costs, significant labor savings in on-site work, and even reductions in on-site assembly costs and overall construction costs. [Background technology]

[0002] 2. Description of the Related Art Underwater foundation mounds, which are constructed by dumping a large amount of riprap, are known as foundations for bridges, breakwaters, revetments, and the like, which are constructed on the bottom of water such as the bottom of the sea, a river, or a lake.

[0003] This type of underwater rubble foundation mound is generally covered with concrete base blocks or protective netting to protect the rubble placed in the underwater foundation mound from being washed away by strong waves or water currents.

[0004] For example, Patent Document 1 discloses an invention for an underwater foundation mound protection net structure that is constructed by attaching chains or wires for preventing the movement of foundation rubble within an outer frame formed by assembling steel frames in a flat manner. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 9-316848 Summary of the Invention [Problem to be solved by the invention]

[0006] However, protection using concrete base blocks required the use of large quantities of them, as each block was very heavy and each block only protected a small area of ​​the foundation mound.

[0007] In addition, the underwater foundation mound protection net in Patent Document 1 is lighter than concrete foot protection blocks and can protect a wide area of ​​the foundation mound, but when the protected area is increased, it becomes too large to be transported by land, which poses the two problems described below.

[0008] One issue was that when manufacturing at a factory capable of land transportation, the outer frames of the protective nets must be transported to the site in individually separated states and then assembled on-site by welding, which means that on-site work is required in great volume and can become cumbersome. In addition, the quality of the product is easily affected by working conditions, etc.

[0009] The second problem was that assembling the parts in a factory and then shipping them by sea would result in significantly higher shipping costs, and the transportation would be easily affected by weather conditions.

[0010] The present invention has been made to solve the above problems, and its object is to provide an underwater foundation mound protection net that enables stable product quality, significant reduction in transportation costs, significant labor savings in on-site work, and further reduction in on-site assembly costs and overall construction costs. [Means for solving the problem]

[0011] The present invention is an underwater foundation mound protective net which is composed of an outer frame body and a chain or wire arranged inside the outer frame body for preventing the foundation riprap from moving, and is laid on an underwater foundation mound constructed by dumping a large amount of riprap, and is characterized in that the outer frame body is composed of a pair of outer frame main body portions arranged opposite each other, and a plurality of outer frame main body connecting portions which are arranged between the outer frame main body portions and connect the outer frame main body portions to each other.

[0012] The shape of the outer frame main body is not particularly limited, and may be, for example, substantially U-shaped in plan view. The outer frame body may also be composed of a plurality of outer frame main body parts arranged adjacent to each other, and a plurality of outer frame main body connecting parts arranged between the outer frame main body parts and the outer frame main body parts and connecting the outer frame main body parts to each other. In this case, the shape of the outer frame main body part may be, for example, substantially L-shaped in plan view. Furthermore, the outer frame body may be formed by appropriately combining the U-shaped outer frame main body part and the L-shaped outer frame main body part.

[0013] A screw mechanism consisting of a male thread portion and a female thread portion is provided at each connection portion between the outer frame main body portion and the outer frame main body connector, and one of the screw mechanisms is formed as a right-handed thread and the other as a left-handed thread (reverse thread).By rotating the outer frame main body connector portion in one direction, the outer frame main body portions can be connected to each other simultaneously, allowing for extremely efficient assembly.

[0014] Furthermore, the outer frame main body and the outer frame main body connecting parts can be manufactured at extremely low cost from commercially available products such as steel bars, reinforcing bars, structural steel or steel pipes. Also, when the outer frame main body and the outer frame main body connecting parts are manufactured from structural steel or steel pipes, the required weight of the protective net, which is determined by conditions such as waves and water currents, can be easily secured by filling the outer frame main body and the outer frame main body connecting parts with concrete or sand.

[0015] In addition, by sealing or welding the connection between the outer frame main body portion and the outer frame main body connecting portion, not only can separation during use be prevented, but gaps caused by the interlocking of the screws can be sealed and the screw parts can be made rust-proof. Effect of the Invention

[0016] The underwater foundation mound protection net of the present invention is particularly composed of a plurality of outer frame main body parts whose outer frames are formed in a substantially U shape or an L shape in plan view, and a plurality of outer frame main body connecting parts that are arranged between the outer frame main body parts and connect the outer frame main body parts. Therefore, by making all of them into sizes that can be transported by land, they can be manufactured regardless of the factory, and since most of them can be manufactured in the factory, the product quality can be stabilized, and a significant reduction in transportation costs can be achieved.

[0017] In addition, the outer frame main body part and the outer frame main body connecting part are connected by a screw mechanism composed of a male screw part and a female screw part, and moreover, one of the screw mechanisms is a right-handed screw and the other is a left-handed screw (reverse screw). Therefore, by turning the outer frame main body connecting part in one direction, the outer frame main body parts can be easily assembled on site, and since the assembly work is not affected by the weather, a significant labor saving in on-site work can be achieved, and further, a reduction in on-site assembly costs and overall construction costs can be achieved.

Brief Description of the Drawings

[0018] [Figure 1] An embodiment of the present invention is illustrated. Fig. (a) is a plan view of the underwater foundation mound protection net, and Fig. (b) is a plan view before assembly of the frame main body part and the frame main body connecting part that constitute the underwater foundation mound protection net in Fig. (a). [Diagram 2] It is an enlarged cross-sectional view taken along line A-A in Fig. 1(a) showing the connecting part between the frame main body part, the frame main body connecting part, and the chain end. [Diagram 3] Another embodiment of the present invention is illustrated. Fig. (a) is a plan view of the underwater foundation mound protection net, and Fig. (b) is a plan view before assembly of the outer frame main body part and the outer frame main body connecting part that constitute the underwater foundation mound protection net in Fig. (a). [Figure 4] Another embodiment of the present invention is illustrated. Fig. (a) is a plan view of the underwater foundation mound protection net, and Fig. (b) is a plan view before assembly of the outer frame main body part and the outer frame main body connecting part that constitute the underwater foundation mound protection net in Fig. (a). [Diagram 5]This illustrates another embodiment of the present invention, where Figure (a) is a plan view of an underwater foundation mound protection net, and Figure (b) is a plan view of the outer frame main body and the outer frame main body connecting parts that constitute the underwater foundation mound protection net of Figure (a) before assembly. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Figures 1 and 2 show an underwater foundation mound protection net (hereinafter referred to as "protection net") according to one embodiment of the present invention. In the figures, the protection net 1 is composed of an outer frame body 2 formed in a substantially rectangular shape when viewed from above, and a number of chains or wires (hereinafter referred to as "chains") 3 arranged in a lattice pattern inside the outer frame body 2 to prevent the foundation rubble from moving.

[0020] The outer frame body 2 is formed in an approximately U-shape when viewed in a plane, and is composed of a pair of outer frame main body portions 4,4 arranged opposite each other, and a pair of outer frame main body connecting portions 5,5 arranged between the outer frame main body portions 4,4 and cooperating with the outer frame main body portions 4,4 to form the outer frame body 2.

[0021] The outer frame body 4 is formed in a generally U-shape in plan view from parallel portions 4a, 4a arranged in parallel and a connecting portion 4b connecting one end side portions of the parallel portions 4a, 4a. Male thread portions 4c, 4c are formed at the tip of the parallel portions 4a, 4a of one outer frame body 4, and female thread portions 4d, 4d are formed at the tip of the parallel portions 4a, 4a of the other outer frame body 4.

[0022] The outer frame body connecting parts 5, 5 are formed in a straight line and are arranged on the same axis as the parallel parts 4a, 4a of the outer frame body parts 4, 4. Furthermore, a female threaded part 5a that screws into the male threaded part 4c is formed at one end of the outer frame body connecting parts 5, 5, and a male threaded part 5b that screws into the female threaded part 4d is formed at the other end. Furthermore, one of the male threaded part 4c and the female threaded part 5a (screw mechanism) and the female threaded part 4d and the male threaded part 5b (screw mechanism) is formed as a right-handed thread, and the other is formed as a left-handed thread (reverse thread).

[0023] A plurality of brackets 6 are attached to the parallel portions 4a, 4a of the outer frame main body portions 4, 4 and to the inside portions of the outer frame main body connecting portions 5, 5 at equal intervals in the axial direction of the parallel portions 4a, 4a and the outer frame main body connecting portions 5, 5.

[0024] The male threaded portion 4c and the female threaded portion 5a, and the female threaded portion 4d and the male threaded portion 5b are screwed together, respectively, so that the outer frame main body portions 4, 4 and the outer frame main body connecting portions 5, 5 are connected to each other, thereby forming the outer frame body 2.

[0025] In this case, the male threaded portion 4c and the female threaded portion 5a, and the female threaded portion 4d and the male threaded portion 5b are formed with reverse threads, so that when the outer frame main body connecting portions 5,5 each rotate in one direction, the parallel portions 4a,4a of the outer frame main body portions 4,4 are attracted to each other and connected to the outer frame main body connecting portions 5,5.

[0026] In addition, both ends of each chain 3 arranged in a lattice pattern inside the outer frame body 2 are connected to each bracket 6, 6 of the parallel parts 4a, 4a and the frame body connecting parts 5, 5. The protective net 1 is configured as described above.

[0027] The outer frame main body 4 and the outer frame main body connecting parts 5 are formed from structural steel such as H-shaped steel or angle steel, or square steel pipes or circular steel pipes, or even reinforcing bars or steel bars, and the brackets 6 are formed from steel plates or the like, and each bracket 6 is attached to the parallel parts 4a, 4a of the outer frame main body 4 and the inside of the outer frame main body connecting parts 5 by welding or the like, and both ends of each chain 3 are connected to the brackets 6 by mounting bolts 7.

[0028] In addition, when the outer frame main body portion 4 and the outer frame main body connecting portion 5 are formed from structural steel or steel pipes, concrete or sand, etc., is filled into the outer frame main body portion 4 and the outer frame main body connecting portion 5 as necessary to ensure the required weight of the protective net 1, which is determined by conditions such as waves and water currents.

[0029] In addition, by sealing or welding the connections between the outer frame main body parts 4 and the outer frame main body connecting parts 5, it is possible to prevent the connections from coming apart during use, and it is also possible to seal gaps that occur due to the interlocking of the screws and to prevent rusting of the threads.

[0030] Figures 3(a) and (b) illustrate a protective net according to another embodiment of the present invention, in which in particular a male thread portion 4c is formed at one end of the parallel portions 4a, 4a of each outer frame main body portion 4, 4, and a female thread portion 4d is formed at the other end.

[0031] Further, at both ends of each outer frame body connecting portion 5, 5, a female thread portion 5a and a male thread portion 5b are formed facing the male thread portion 4c and the female thread portion 4d, respectively.

[0032] The male threaded portion 4c and the female threaded portion 5a, and the female threaded portion 4d and the male threaded portion 5b are screwed together, whereby the outer frame main body portions 4, 4 and the outer frame main body connecting portions 5, 5 are connected to each other.

[0033] According to this embodiment, it is sufficient to arrange for one type of frame main body portion 4, 4 constituting the outer frame body 2, in which a male thread portion 4c is formed at one end of the parallel portions 4a, 4a and a male thread 4d is formed at the other end thereof.

[0034] Figures 4(a) and (b) also show another embodiment of the present invention, in which the outer frame main body portions 4, 4 constituting the outer frame body 2 are formed in an approximately L-shape when viewed in plan, and are arranged adjacent to each other.

[0035] A male thread portion 4c is formed at one end of each of the straight line portions 4e, 4e that form each outer frame main body portion 4, and a female thread portion 4d is formed at the other end of each of the straight line portions 4e, 4e that form each outer frame main body portion 4. A female thread portion 5a is formed at one end of each of the outer frame main body connecting portions 5 that are disposed between the straight line portions 4e, 4e of each of the outer frame main body portions 4, 4, and a male thread portion 5b is formed at the other end of each of the outer frame main body connecting portions 5.

[0036] Furthermore, one of the male thread portion 4c and the female thread portion 5a and the female thread portion 4d and the male thread portion 5b is formed as a right-handed thread, and the other is formed as a left-handed thread (reverse thread). In this configuration, by turning each outer frame body connecting portion 5 in one direction, adjacent outer frame bodies 4, 4 are attracted to each other and connected to each other.

[0037] In the embodiment shown in Figures 1(a) and (b) to 4(a) and (b), the screw mechanism at the connection between the outer frame main body connecting portion 5,5 and the outer frame main body portions 4,4 arranged on both end sides of the outer frame main body connecting portion 5,5 may be all male threads on the outer frame main body connecting portion 5,5 side and all female threads on the outer frame main body portions 4,4 side, or all female threads on the outer frame main body connecting portion 5,5 side and all male threads on the outer frame main body portions 4,4 side.

[0038] For example, in the embodiment shown in Figures 5(a) and (b), female thread portions 4d, 4d are formed at the tips of the straight portions 4e, 4e that form each outer frame main body portion 4, and male thread portions 5b, 5b are formed at both ends of the outer frame main body connecting portion 5 arranged between the straight portions 4e, 4e of each outer frame main body portion 4, 4.

[0039] Furthermore, one of the male thread portion 4c and the female thread portion 5a and the female thread portion 4d and the male thread portion 5b is formed as a right-handed thread, and the other is formed as a left-handed thread (reverse thread). In this configuration, by turning each outer frame main body connecting portion 5 in one direction, adjacent outer frame main body portions 4, 4 are attracted to each other and connected to each other. [Industrial Applicability]

[0040] The present invention can protect rubble dropped into an underwater foundation mound from strong waves and water currents, and in particular can stabilize product quality, significantly reduce transportation costs, significantly reduce on-site labor, and even reduce on-site assembly costs and overall construction costs. [Explanation of symbols]

[0041] 1. Protective net (underwater foundation mound protective net) 2 Outer frame 3 Chain (Chain or Wire) 4 Outer frame body 4a Parallel part of outer frame body 4b Connection part of outer frame body 4c Male thread 4d Female thread 4e Straight section of outer frame body 5 Outer frame body connection part 5a Female thread 5b Male thread 6 Bracket 7 Connecting bolt

Claims

1. An underwater foundation mound protection net comprising an outer frame body and a chain or wire arranged inside the outer frame body for preventing the foundation riprap from moving, and which is laid on top of an underwater foundation mound constructed by dumping a large amount of riprap, wherein the outer frame body is comprised of a pair of outer frame main body portions arranged opposite each other, and a plurality of outer frame main body connecting portions arranged between the outer frame main body portions and the outer frame main body portions, which connect the outer frame main body portions to each other.

2. 2. The underwater foundation mound protection net according to claim 1, wherein the outer frame main body is formed in a generally U-shape when viewed from above.

3. 3. The underwater foundation mound protection net according to claim 1 or 2, characterized in that a screw mechanism consisting of a male thread portion and a female thread portion is provided at each connection portion between the outer frame main body portion and the outer frame main body connecting portion, one of the screw mechanisms being formed as a right-handed thread and the other being formed as a left-handed thread.

4. 4. The underwater foundation mound protection net according to claim 3, wherein the outer frame main body portion and the outer frame main body connecting portion are formed from steel bars, reinforcing bars, steel sections or steel pipes.

5. 4. The underwater foundation mound protection net according to claim 3, wherein the connection portions are sealed or welded.

6. An underwater foundation mound protection net comprising an outer frame body and a chain or wire arranged inside the outer frame body for preventing the foundation riprap from moving, and which is laid on top of an underwater foundation mound constructed by dumping a large amount of riprap, wherein the outer frame body is composed of a plurality of outer frame main body portions arranged adjacent to each other, and a plurality of outer frame main body connecting portions arranged between the outer frame main body portions and the outer frame main body portions arranged adjacent to each other, connecting the outer frame main body portions to each other.

7. 7. The underwater foundation mound protection net according to claim 6, wherein the outer frame main body is formed into a generally L-shape in a plan view.

8. An underwater foundation mound protection net as described in claim 6 or 7, characterized in that a screw mechanism consisting of a male thread portion and a female thread portion is provided at each connection portion between the outer frame main body portion and the outer frame main body connection, one of the screw mechanisms being formed as a right-handed thread and the other being formed as a left-handed thread.

9. 9. The underwater foundation mound protection net according to claim 8, wherein the outer frame main body portion and the outer frame main body connecting portion are formed from steel bars, reinforcing bars, steel sections or steel pipes.

10. 9. The underwater foundation mound protection net according to claim 8, wherein the connection portions are sealed or welded.

Images