JPH0338398B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a submerged canister used for constructing undersea tunnels and the like.

(Conventional technology) Because immersed canals are constructed on the seabed, etc., where they are significantly affected by external pressure, there are many difficulties in construction, and sufficient consideration must be given to earthquake resistance and water-stopping properties. In Japan, where the number of people affected is extremely high, structural measures are required. As an earthquake-resistant measure for immersed canals that are generally made of concrete,
It is configured to prevent relative displacement of the axial line of the immersed canopy, while allowing the end faces of the immersed canopy to approach and separate from each other, thereby absorbing external forces due to ground movement, etc.

Conventionally, as a water stop device for a seam in a constructed submerged canister, a rubber gasket is interposed between the opposing end faces of adjacent submerged canisters, and a rubber gasket is interposed between them, and a rubber gasket is inserted between the end faces of the submerged canisters. It has been proposed that a flexible water-stopping member is provided and the ends of the flexible water-stopping member are watertightly fixed to each end face of a submerged can.

(Problems to be Solved by the Invention) In the water stop device configured in this way, the rubber gasket as the primary water stop part is configured to withstand high external water pressure, performs a water stop function, and at the same time is capable of controlling ground conditions. It is required to maintain water-stopping properties by following the approach and separation between the end faces of adjacent buried canals due to changes in water, temperature changes, earthquakes, etc.; It has been difficult to maintain watertightness when the space between the two is close to each other.

That is, if the opposing end faces of the submerged case become separated, the pressure force between the end face of the submerged case and the rubber gasket becomes weak, or the end face of the submerged case and the rubber gasket become separated, making it impossible to maintain water-stopping properties. In this case, both ends of the secondary flexible water-stopping member are simply supported by the end faces of the submerged canister, and since it is impossible to withstand high external water pressure, it bursts all at once and falls into the submerged canister. There is a risk of large amounts of water entering.

On the other hand, if the opposing end faces of adjacent immersed canals come close to each other, a large compressive force acts on the rubber gasket, causing it to collapse, weakening its water-stopping properties and causing water to leak into the immersed canals. Therefore, the water-stopping property at the joint between adjacent immersed canals is maintained only when the end surfaces of adjacent immersed canals approach and separate within the range that can be compressed and deformed while maintaining the water-stopping property of the rubber gasket, and its followability is It was only in extremely limited quantities.

The present invention was made in view of the above-mentioned problem of buried canisters that are significantly affected by external pressure, and its purpose is to improve water-stopping properties by following external forces that act on adjacent buried canals and causing large approaches and separations. The purpose is to provide a submerged container that can be maintained. More specifically, it is an object of the present invention to provide a submerged canister that can maintain water-tightness by smoothly following external forces such as earthquakes that cause the end faces of the submerged canister to approach and separate rapidly, with sufficient durability. be.

(Means for Solving the Problems) In order to achieve the above object, in the first invention, the submerged canister is of a divided type, and between the anchoring members fixed to the opposing end faces of the divided submerged canister is provided. , a short cylindrical flexible waterstop having an annular bent part extending between the anchoring members and protruding outward, and a connecting part and a mounting part formed continuously with the annular bent part. arranging a member, and interposing a splicing plate between the connecting portion and the mounting portion of the flexible water-stopping member to watertightly fix the mounting portions of the flexible water-stopping member to the anchoring member, respectively. At the same time, an annular receiving member is interposed between the splint and the connecting portion, and a load-bearing member extending in the axial direction of the submerged canister is installed in the cavity of the anchoring member on the radially inner side close to the flexible water-stopping member. The invention is characterized in that it has a built-in expansion joint part having at least a structure in which a load receiving member is slidably but not detachably inserted into the space, and the load bearing member slides in the gap.

Furthermore, in the second invention, between the anchoring members fixed to the opposing end faces of the divided submerged canal, an annular bent portion extending between the anchoring members and protruding outward is provided. a short cylindrical first flexible water-stopping member having a connecting portion and a mounting portion continuously formed in the annular bent portion thereof; A splint is interposed between the connecting portion and the attachment portion to watertightly fix the attachment portions of the first flexible water stop member to the anchoring member, respectively, and between the splint and the connecting portion. A first load-bearing member, which extends in the axial direction of the submerged canister on the radially inner side adjacent to the first flexible water-stopping member, is slidable into the gap of the anchoring member and can be pulled out. A primary water stop portion is formed by providing a load receiving member that is inserted in an unremovable manner and on which the load-bearing member slides in the cavity, and the anchor is inserted between the anchor members on the radially inner side of the primary water stop portion. A short cylindrical second flexible water stop, which is provided with an annular bent part that extends between the attached parts and is raised outward, and has a connecting part and a mounting part formed continuously with the annular bent part. a member is disposed, and a splice is interposed between the connecting portion and the mounting portion of the second flexible water-stopping member to respectively anchor the mounting portion of the second flexible water-stopping member. A second flexible water-stopping member is fixed to the member in a watertight manner, has an annular receiving member interposed between the splint plate and the connecting portion, and extends in the axial direction of the submerged canister on the radially inner side close to the second flexible water-stopping member. A second load-bearing member is slidably but not detachably inserted into the gap of the anchoring member, and a load receiving member on which the load-bearing member slides is provided in the gap to form a secondary water stop part. The invention is characterized in that it has a built-in expansion joint portion having at least the following structure.

(Function) In this way, in the first invention, a flexible water-stopping member extending between both anchoring members is provided between the end faces of the divided submerged canopy, so that fluctuations in the ground can be avoided. In the case of heat, it is possible to allow the end faces of the divided submerged canals to approach and separate from each other, thereby absorbing external forces due to fluctuations, etc. This flexible water-stopping member is provided with an annular bent portion that protrudes outward, so when the opposing end surfaces of the divided submerged canister are approached and separated, this annular bent portion is deformed by being raised and collapsed. It becomes possible to follow the approach and separation of the end faces.

Furthermore, a splint is interposed between the connecting part and the mounting part formed continuously on the annular bent part of the flexible water-stopping member, and the mounting parts of the flexible water-stopping member are fixed to the respective anchoring members in a watertight manner. Then, the attachment part is firmly bolted to the anchoring member by the arrangement of the splice plate. Furthermore, by interposing the annular receiving material between the splint and the connecting part, the external water pressure received at the connecting part of the flexible water stop member is transmitted to the splint via the annular receiving material, and the attachment part and the anchor are connected to each other. In addition to further increasing the watertightness of the fixation with the mounting member, this annular receiving member prevents the flexible water-stopping member from directly contacting the fixing bolt and being damaged, and smoothly contacts the flexible water-stopping member. To prevent damage to the flexible water stop member during deformation or relative movement.

In addition, on the radially inner side close to the flexible water stop member,
Since the load-bearing member extending in the axial direction of the immersed canopy is inserted into the cavity of the anchoring member in a slidable and non-removable manner, this load-bearing member supports the flexible water-stopping member that is affected by external water pressure. This prevents the occurrence of abnormal deformation of the flexible water-stopping member, and also prevents the flexible water-stopping member from becoming detachable, thereby preventing the gap from increasing beyond a certain level. Furthermore, by providing a load-receiving member on which the load-bearing member slides in the cavity, the liquid weight of the load-bearing member applied by the flexible water-stopping member under the action of external water pressure is dispersed and supported, and the load-bearing member is To prevent damage to the anchoring member or the load-bearing member itself due to sudden movement of the load-bearing member by making sliding of the member smooth. Moreover, in the second invention, since the secondary water stop part is provided inside the primary water stop part, it becomes possible to further increase the water stop effect and the water stop safety factor.

(Example) Hereinafter, the present invention will be described based on drawings showing examples. In Figure 1, A is an immersed casing and the split immersed casing joint A3 is formed between the split immersed casings _A1 and _A2 .
The expansion joint part 1 is attached to. Split immersion A ₁ ,
As shown in Fig. 2, A ₂ is connected by a plurality of connecting cables 2 so as not to be separated by more than a certain distance, and a comb-shaped shearing key 3 is installed on the opposing end surfaces of the divided submerged canisters A ₁ and A ₂ , respectively. Relative displacement of the axes of the divided submerged canals A ₁ and A ₂ by providing them alternately and interposing the cushioning rubber material 4,
In other words, it is designed to prevent shear deformation at the immersed casing joint A3, and to allow the opposing end faces of the divided immersed casings A ₁ and A ₂ to approach and separate from each other, thereby absorbing external forces such as ground movement. Although not shown,
Adjacent buried canals may be connected by any conventional method.

In FIGS. 2 to 8, reference numerals 5 and 6 are anchoring members, which are fixed to opposing end surfaces of the divided submerged canals A ₁ and A ₂ and support a load-bearing member 7 and a flexible water-stopping member 8, which will be described later. do. These anchoring members 5 and 6 are divided submerged canals.
It is formed in an annular shape along the end faces of A ₁ and A ₂ ,
It has cylindrical frame parts 9 and 10 extending along the outer peripheral surfaces of the divided submerged canisters A ₁ and A ₂ . The anchors 11 and 12, which are integrally fixed to the cylinder frames 9 and 10, are buried in the bodies of the divided immersed canals A ₁ and A ₂ , and the anchoring members 5 and 6 are attached to the divided immersed canals A ₁ and A 2 . A protective cylinder ₁₃ is fixed to the end faces of the cylinder frames 9 and 10, respectively, and extends between the cylinder frames 9 and 10. The two ends are spot welded to the cylindrical frame parts 9 and 10, or one end is welded and the other end is spot welded to prevent the intrusion of earth and sand during normal conditions. On the other hand, annular housing parts 14 and 15 are provided inside the cylinder frame parts 9 and 10.

The housing parts 14 and 15 have annular partition frame plates 16 and 1 whose one ends are fixed to the cylindrical frame parts 9 and 10 at intervals.
7. Inner end frame plates 18, 19 and connecting frame plates 20, 21
The spaces surrounded by each component are defined as voids 22 and 23. The inner end frame plates 18 and 19 are provided with openings 24 and 25 facing each other,
Ends of the load-bearing member 7 extending in the axial direction of the submerged canister A from the openings 24 and 25 are inserted into the cavities 22 and 23. The load-bearing member 7 here includes a plurality of H steels arranged at equal intervals in the same direction of the anchoring members 5 and 6 in a cylindrical shape as a whole, and a flexible water stop member 8 that is affected by external water pressure. This prevents abnormal deformation of the flexible water stop member 8 from occurring. As long as it has such a function, the shape of the load-bearing member 7 is arbitrary, and it may be a plate, a rod, a hollow box, or a continuous integral cylinder. Load-bearing member 7 using H steel 26 as an example
Referring to FIG. 3, enlarged portions 27 and 28 are formed at both ends of the H steel 26 to prevent the H steel 26 from slipping out of the gaps 22 and 23. As a means to prevent this coming off, the partition frame plate 1
6, 17 and the end of the H steel 26, etc., but is not limited to the enlarged portions 27, 28. Furthermore, a sliding material 30 is applied to the sliding surface 29 of the H steel 26 that comes into contact with the flexible water stop member 8.

This lubricant 30 is a divided submerged box of the flexible water stop member 8.
This is to make the tracking of the approach and separation between A ₁ and A ₂ smooth, and a material with a low coefficient of friction such as tetrafluoroethylene resin, high-density polyethylene, ABS resin, etc. is bonded to the H steel 26 and baked. is preferred. The main purpose of this lubricant 30 is to smooth the initial deformation of the flexible water stop member 8, that is,
Generally, static frictional force is larger than dynamic frictional force, so the initial deformation of the flexible water-stopping member 8 due to the approach and separation between the end faces of the divided submerged canisters A ₁ and A ₂ is smoothed, and the flexible water-stopping member 8 is partially Therefore, the slipping material 30 is applied to part or all of the sliding surface 29 of the H steel 26 with the flexible water stop member 8, or to the entire H steel 26. It's okay.
The same applies when the load-bearing member 7 is made of a material other than the H steel 26.

A gap is provided between both ends of the force-bearing member 7, which is irremovably inserted into the cavities 22 and 23, and the partition frame plates 16 and 17, so that the force-bearing member 7 can slide.

31 and 32 are load receiving members. Load receiving member 3
Reference numerals 1 and 32 denote a force-bearing member 7 which is attached by a flexible water stop member 8 which is placed in the voids 22 and 23 so as to support both ends of the force-bearing member 7 and is subjected to the action of external water pressure.
In addition to distributing and supporting the load, the load-bearing member 7 slides smoothly to prevent damage to the anchoring members 5, 6 or the load-bearing member 7 itself due to sudden movement of the load-bearing member 7, and is made of tetrafluoroethylene resin. It is preferable to use a material with a small coefficient of friction, such as high-density polyethylene, ABS resin, etc.

Reference numerals 33 and 34 indicate spacing claws, which are set on the inner end frame plates 18 and 19 at a constant interval to hold the load-bearing members 7,
7... is maintained to prevent the load-bearing members 7, 7... from being unevenly distributed. 35 and 36 are the housing parts 14 and 15
This is a reinforcing plate to increase the strength of the

On the outside adjacent to the cylindrical row of the load-bearing members 7,
A flexible water stop member 8 formed into a short cylinder shape from rubber, synthetic resin, or the like is provided. As shown in FIG. 4, the flexible water stop member 8 has mounting portions 37 and 38 formed in an annular shape along the inner end frame plates 18 and 19 at both ends, and a load-bearing member that is bent from the mounting portions 37 and 38. connecting portions 39 and 40 extending toward 7; sliding contact portions 41 bending from the connecting portions 39 and 40 and extending along the load-bearing member 7;
42, and a central annular bent portion 43 that bends and protrudes outward from the sliding contact portions 41, 42.

The mounting parts 37 and 38 are provided with bolt insertion holes 44 and 45 at equal intervals in the circumferential direction.
The area near 45 is thickened in an annular manner along the circumference of the submerged enclosure A, and a water stop protrusion 48 is provided on the contact surfaces 46 and 47 with the inner end frame plates 18 and 19. . The mounting parts 37 and 38 configured in this way are
It is bolted to the inner end frame plates 18, 19 so as to be pinched between the splints 49, 50 and the inner end frame plates 18, 19. 51 and 52 shown in FIG. 2 are annular receiving members.

The annular receiving members 51, 52 are interposed between the splices 49, 50 and the connecting parts 39, 40, and the connecting parts 39, 40
It has a function of transmitting the external water pressure received by the mounting plates 49 and 50 to the attachment plates 49 and 50 to improve the watertightness of the mounting parts 37 and 38. In addition, the flexible water stop member 8 is prevented from being damaged due to direct contact with the fixing bolt, and the flexible water stop member 8 is prevented from being damaged by smooth contact with the flexible water stop member 8 during deformation or relative movement. It also has the function of preventing Materials that contribute to this function include resins such as polyethylene and ABS, and hard rubber steel.

The annular bent part 43 is raised and deformed in accordance with the approach and separation between the opposing end surfaces of the divided submerged canals A ₁ and A ₂ . It is preferable that the On the other hand, it is possible to provide multiple annular bends, but
Providing the multi-striped annular bent portion 43 on the flexible water-stopping member 8 cannot follow sudden displacements caused by earthquakes, etc., and the flexible water-stopping member 8 may be damaged due to partial excessive tensile force acting on it. It can cause . That is, the fifth
To explain in detail with reference to the drawings and FIG. 6, if two annular bent portions 53 and 54 that protrude outward are provided in the center of the flexible water stop member 8, from the normal state shown in FIG. Due to the sudden separation between the end faces of the submerged canals A ₁ and A ₂ , the flexible water stop member 8 is extended and subjected to displacement (6th
figure). At this time, the flexible water-stopping member 8 is in a state of being pressed by the force-bearing member 7 under high external water pressure, and a large frictional force acts between the flexible water-stopping member 8 and the force-bearing member 7. Since the static friction force is generally larger than the dynamic friction force, the friction force between the flexible water stop member 8 and the load-bearing member is also not uniform. Therefore, when the flexible water-stopping member 8 undergoes an elongation displacement, it is considered that the annular bent portion 53 that first starts to move is continuously deformed to collapse, as shown in FIG. When the annular bending part 53 shifts from the following by the falling deformation to the bending deformation of the annular bending part 54, a sudden tensile force acts on the flexible water stop member 8 partially, causing the annular bending part 54 to collapse. There is a risk of damage occurring before lodging deformation occurs. Therefore, the more annular bent parts are provided, the more likely it is that excessive tensile force will be generated locally in the flexible water-stopping member 8, and the prediction of the behavior of the flexible water-stopping member 8 becomes uncertain.
When actually carrying out construction, safety factors must be taken into account, which increases costs.

As described above, the flexible water-stopping member 8 with the annular bent portion ₄₃ provided in the center is schematically illustrated in _FIGS . As illustrated in FIG.
It easily follows the lodging deformation and maintains water-stopping properties.

Furthermore, when the annular bent part 43 of the flexible water-stopping member 8 is made into a single strip, it is easy to predict the behavior of the annular bent part 43 when the end faces of the divided submerged canisters A ₁ and A ₂ suddenly approach and separate from each other. Another advantage is that the strength of the water stop member 8 can be easily and reliably designed.

In addition, the tensile strength of the flexible water-stopping member 8, which rises and collapses while being pressed against the load-bearing member 7 by high external water pressure, is increased, and the load-bearing member 7 of the flexible water-stopping member 8,
In order to prevent water from sagging into the gap 7 due to external water pressure, it is preferable to embed or attach a reinforcing cloth 55 to the flexible water-stopping member 8, as shown in FIG.
Reinforcing cloths include nylon cloth, wire mesh, glass fiber,
Examples include vinylon cloth, canvas, and sagging cord.

What is shown in FIG. 9 shows another embodiment of the present invention. Expansion joint section 100 according to this embodiment
The expansion joint part 1 having the above-mentioned configuration is used as a primary water stop part 101, and a secondary water stop part 102 is provided inside the primary water stop part 101 in the radial direction to increase the water stop effect and the water stop safety factor, The secondary water stop section 102 is configured in substantially the same manner as the primary water stop section 102, and the same reference numerals are given to the same members as those described above, and explanations thereof will be omitted.

The flexible water stop member 103 disposed in the secondary water stop part 102 of this expansion joint part 100 is similar to the flexible water stop member 8 of the primary water stop part 101 in FIG. 9 showing the second embodiment. , an annular bent portion 104 is provided in the center that protrudes outward, but the present invention is not limited to this as in the first embodiment. That is,
As long as the water-stopping property is maintained in the primary water-stopping part 101, the flexible water-stopping member 103 of the secondary water-stopping part 102 is not directly affected by external water pressure, and is not affected by the frictional force with the load-bearing member 7 as described above. There is no need to take this into consideration, and even if a plurality of annular bent portions 104 are provided, the above-mentioned problem does not occur. However, if the water-stopping properties of the primary water-stopping part 101 are no longer maintained, for example, if the flexible water-stopping member 8 of the primary water-stopping part 101 is damaged, if the flexible water-stopping member 103 is Since it is affected by external water pressure, it is preferable that the annular bent portion 104 be a single strip for the reasons described above.

(Effects of the Invention) With the above-described configuration, the present invention can maintain water-stopping properties by following sudden and large approaches and separations between the end faces of the divided submerged canopy, and this is due to external forces such as ground movement. can be absorbed smoothly and can also contribute to preventing damage to the submerged canal structure. Also,
It also has an advantage in terms of construction, since the expansion joint of the submerged canopy can be installed and constructed in advance on land.

In addition, since the expansion joint in the second invention has a secondary water stop part provided radially inside the primary water stop part, it can withstand high external water pressure and prevents the approach and separation of the divided submerged canisters. The water effect and water stop safety factor can be increased.

[Brief explanation of the drawing]

Figure 1 is a schematic perspective view of the submerged canister, Figure 2 is a cross-sectional view taken along - in Figure 1, Figure 3 is a side view of the H steel as a load-bearing member, and Figure 4 is a cross-section of the flexible water-stopping member. 5 and 6 are schematic cross-sectional views explaining the behavior of a flexible water stop member provided with a plurality of annular bent portions,
FIG. 5 shows the normal state, and FIG. 6 shows the time when the end faces of the divided submerged canopies are separated. Figures 7 and 8 are schematic cross-sectional views explaining the behavior of a flexible water-stopping member with a single annular bend in the center, and Figure 7 shows the lodging deformation caused by the separation between the end faces of the divided submerged canopy. Fig. 8 shows the uplift deformation caused by the approach between the end faces of the divided submerged concave walls. FIG. 9 is a sectional view showing the second embodiment. A...Sinking, A ₁ , A ₂ ...Divided sinking, 1...
...Expansion joint according to the first embodiment, 5, 6... Anchoring member, 7... Load-bearing member, 8, 103... Flexible water stop member, 22, 23... Gap portion, 31, 32... Load receiving member, 37, 38... Mounting part, 39, 40...
...Connection part, 43... Annular bending part, 49, 50...
splicing plate, 51, 52... annular support material, 100... expansion joint part according to the second embodiment, 101... primary water stop part, 102... secondary water stop part, 104... annular bending part.

Claims (1)

[Scope of Claims] 1. An annular bent portion extending between the anchoring members and protruding outwards is provided between the anchoring members fixed to the opposing end faces of the divided submerged canal, and that A short cylindrical flexible water-stopping member including a connecting portion and a mounting portion formed continuously on the annular bent portion is disposed, and between the connecting portion and the mounting portion of the flexible water-stopping member. The mounting portions of the flexible water-stopping members are each watertightly fixed to the anchoring member through a splint, and an annular receiving member is interposed between the splint and the connecting portion, and the flexible water-stopping member is A force-bearing member extending in the axial direction of the immersed canopy is inserted into the cavity of the anchoring member in a radially inner side adjacent to the member so as to be slidable and cannot be removed, and the load-bearing member slides into the cavity. 1. A submerged canister characterized by having a built-in expansion joint portion having at least a structure provided with a receiving member. 2. Between the anchoring members fixed to the opposing end faces of the divided submerged canopy, an annular bent part extending across the anchoring members and protruding outward, and continuous with the annular bent part. a short cylindrical first flexible water-stopping member having a connecting portion and a mounting portion formed by the The mounting portions of the first flexible water stop members are each watertightly fixed to the anchoring member through a splint, and an annular receiving member is interposed between the splint and the connecting portion, A first force-bearing member extending in the axial direction of the submerged canister is slidably and irremovably inserted into the cavity of the anchoring member on the radially inner side adjacent to the first flexible water-stopping member, and A load receiving member on which the load-bearing member slides is provided to form a primary water stop portion, and a load receiving member on which the load bearing member slides is provided between the anchoring members on the radially inner side of the primary water stopping portion, and extending between the anchoring members and on the outside. A short cylindrical second flexible water-stopping member is disposed, which has an annular bent portion protruding toward the side, and a connecting portion and a mounting portion formed continuously with the annular bent portion, and A splicing plate is interposed between the connecting portion and the mounting portion of the second flexible water-stopping member to watertightly fix the mounting portions of the second flexible water-stopping member to the anchoring member. An annular receiving member is interposed between the plate and the connecting portion, and a second load-bearing member extending in the axial direction of the submerged canopy is placed on the radially inner side close to the second flexible water-stopping member. an expansion joint part having at least a structure in which a secondary water stop part is formed by inserting a load-receiving member slidably and irremovably into a cavity, and on which the load-bearing member slides in the cavity, forming a secondary water stop part; A sunken kan that is characterized by having a built-in body.