JPH01263389A - Water stop structure and execution thereof - Google Patents

Abstract

PURPOSE:To carry out execution surely and at a low cost by providing a water stop member in which a hard body is laminated on an elastic body in such a way that the hard body is projected out of the joint faces of segments and attaching by pressure the joint faces of both segments to each other via cover sheets. CONSTITUTION:A lateral trapezoid-shaped recessed groove D is provided on the upper portion of a bolt inserting hole on the outer edge of each of both right/left end portions and both front/rear end portions of each unit segment A, A'. A water stop member 6 formed by bonding a hard body 5 to an elastic body 3 in a body is closely attached to the recessed groove D in such a way that the hard body 5 is projected out of the joint faces 7 of both segments A, A'. The portions spreading over the outside faces of the hard bodies 5 and the joint faces 7 on the upper and lower portions thereof of the segments A, A' are covered with cover sheets 8, respectively. Force is applied to the pair of segments A, A' from right and left directions to bring the cover sheets 6 into contact with each other and, by further increasing the force, the elastic bodies 3 are subjected to elastic deformation to completely bring the sheets 8 of the segments A, A' into contact with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention is a method for constructing a tunnel or the like by connecting a large number of segments.
The present invention relates to a water-stop structure between segments when constructing No. 14 and a method of constructing the structure.

(Prior art and its problems) Conventionally, when constructing structures such as tunnels, multiple @
The tear segments 1~ are joined in the front-back and left-right directions to form a predetermined structure. Such structures include general tunnels through which people, automobiles, railway vehicles, etc. pass, as well as tunnels, or cable conduits, in which various cables such as telephone lines and power transmission lines are buried. , gas pipes, water and sewerage,
There are surrounding walls of the subway, and these are installed underground. In addition to tunnels, elevated railways and expressways are also included in the above-mentioned structures.

In such structures, especially I-channels installed underground, high pressure is applied to the joints between the unit segments of the I-channel, and groundwater from underground seeps out, resulting in an enormous amount of seepage over a long period of time. become. In tunnels through which people pass, even if some groundwater seeps out, it will not have much of an effect.
In cables such as telephone lines, exudation water has a great negative effect, and water stopping at the joints between the unit segments has been recognized as a very important problem, and a number of water stopping methods have been proposed. .

A conventional general unit segment has the structure shown in Fig. 4, and the unit segments (8) are sequentially joined circumferentially (IT) and their ends are connected by a straight member as shown in Fig. 5. The 1-channel B structure shown in FIG.

The joint C between adjacent unit segments L and A receives high pressure from the underground side as shown by the arrow, and if the water stoppage at the joint C is insufficient, groundwater will gradually seep out into the tunnel B. Groundwater accumulates in the ground.

In order to prevent such water leakage, conventionally, as shown in Fig. 4, a concave groove I] is formed on the entire circumference of the side surface of the unit segment Δ, especially the unit segment l-A made of concrete, and the adjacent unit segment l It has been proposed that a water stop material be filled between the corresponding grooves between A and A, and that the water stop material is used to stop water from entering the unit segment.

As shown in FIG. 6, filling of the water stop material according to the conventional technique
A depth d of the groove I] of one unit segment l-A of a pair of adjacent unit segments A and A' to be joined.
A rectangular parallelepiped-shaped water stopper 4t E made of a wider material such as water-swellable rubber is installed, and the above-mentioned flower position segment I-A is installed.
and the surface of the waterproof material E are coated with sheets 1 to F made of, for example, butyl rubber, and
A water-stopping material E" having a width equal to the depth of the groove D' is installed in the groove D' of the other unit segment l-A', and the above-mentioned crown segment l-A is already fixed at a predetermined location. Press onto the other unit segment I-A' with a sprayer or the like to bring them into close contact, and apply port (
(not shown) is passed through to join the 100 unit segments Δ and A1.

In this bonded state, the water-stopping materials E and E' are both deformed by the pressing force as shown in FIG. I'm trying to do that.

If this positional relationship is maintained semi-permanently, the water stoppage between the unit segments will be almost complete, but in reality, as time passes, a gap begins to form between the two upper segments l-A and hemi. With the technology shown in Figure 7, water stoppage 4J'E, E
It is intended that the restoring force of ' is used to close the gap created by slightly increasing the width of the water-stopping materials E and E', thereby achieving complete water-stopping. However, the restoring force of conventional water-stopping iodine is much lower than 100%, and in reality, it is not possible to completely close the gap that has arisen. Also, the water-swellable rubber described above is used as a water-stopping material, and the water that enters the gap is absorbed by the water-swellable rubber, causing the water-swellable rubber to swell and completely close the gap. This technique has also been proposed. However, depending on the expansion rate, water-expandable rubber has sufficient strength if the expansion rate is about 2 to 3 times, but if the expansion rate exceeds this value, water-expandable rubber has sufficient strength. becomes agar-like, and the adhesion between the two water stops ItE and E', which are in contact via Sea 1-F, is insufficient, and the incoming water easily passes between the 100-unit segments I-A and A'. Penetration has the disadvantage that it no longer functions as a water stopper, and the use of water-expandable rubber takes about 1-1 minutes to close the gaps created by using the above-mentioned waterstop materials E and E''. be.

In order to solve these drawbacks, the inventor of the invention proposed a structure in which another water stop structure is formed on the tunnel side between the upper segments I and A to achieve complete water stop, as shown in FIG. This structure is intended to stop the underground water that has oozed out from the human body of the unit segment (H) when it enters the tunnel by using a seal (J) formed with an adhesive layer (H) between the tunnel side ends of adjacent segment (A). , Almost complete water stoppage can be achieved by this method. However, this water-stop structure is structurally quite complex, and after the tunnel is completed, it is necessary to install a water-stop structure at each joint, which increases material and construction costs, and the unit cost per km. The drawback is that it would be several hundred million yen, which is not realistic.

(Object of the Invention) Therefore, the present invention solves the drawbacks of the prior art, and
The purpose of this invention is to maintain a water-stopping structure and its construction method that ensures complete water-stopping at low cost and over a long period of time.

(Means for Solving the Problems) The present invention provides at least one layer of a hard material and at least one layer of an elastic material in the groove of at least one of a pair of unit segments in which a groove is formed on the joint surface. A waterproofing material made of a laminated layer is arranged such that the hard body of the outermost layer protrudes from the joint surface of the unit segment, and a cover sheet is coated on the joint surface and the surface of the hard body. A water-stop structure for unit segments I~ formed by crimping both joint surfaces of the unit segments via the cover sheet, and a method for constructing the same,
The water-stopping material may be arranged in both concave grooves of both unit segments, and both water-stopping materials may be crimped together via a cover sheet to create a stronger water-stopping structure, or one layer of hard material and one layer of elastic material may be used. It is also possible to constitute the water-stopping material by only the water-stopping material.

The present invention will be explained in detail below.

The present invention differs from the conventional water-stopping structure shown in FIG. 7 in that the water-stopping material is constructed by laminating a hard body and an elastic body, and is disposed in one or each groove of a pair of adjacent unit segments. By pressing and deforming the waterproof material on which the seams 1 to 1 are coated to join both unit segments, only the elastic body is almost selectively deformed without deforming the hard body. I try to let them do it.

Therefore, the elasticity caused by the elastic deformation of the elastic body presses the hard body of both unit segments to ensure water stop between the two vehicle position segments, and since the hard body does not have complete restoring force, it hardly deforms. Its physical strength hardly decreases over time, making it possible to reliably seal off water between unit segments over a long period of time.

The water-stop structure or the construction method of the structure according to the present invention can be applied to, for example, I-channels through which people, automobiles, railway vehicles, etc. pass, telephone lines, power transmission lines, optical fiber interlocking cables, and various cables buried underground. These include cable pipes, surrounding walls of subways, elevated passageways for expressways and Shinkansen trains, underground water tanks, etc.

As shown in FIG. 4, the unit segment used in the present invention is a unit segment with a concave groove formed on the joint surface to another adjacent unit segment 1, and a conventional unit segment with a concave groove formed therein. may be used as is, or a unit segnon 1- with a new groove formed therein may be manufactured and used, or the existing groove may be filled with an appropriate material to make it flat and the groove It may also be used as a unit segment on the side without. In addition to the arc shape shown in FIG. 4, the unit segment may have a cylindrical shape, a square tube shape, a rectangular parallelepiped shape, etc., and the unit segment may be solid or hollow. Alternatively, it may be something that is already shaped into a cylindrical shape, such as a man ball, in which case it will be stretched only in the length direction.

The water stop material is constructed by laminating a hard body having relatively high hardness and an elastic body having less hardness and greater flexibility than the hard body. It takes 11 minutes to laminate two layers each of the hard body and the elastic body, but in addition to this, for example, a plurality of thin layers of a plurality of hard bodies and a plurality of thin layers of a plurality of elastic bodies can be laminated alternately. In this case, at least one of the two outermost layers is made of a hard material. The outer diameter of the waterproof material is 6 years old.The part located on the side of the groove is aligned with the inner surface of the groove, and the part protruding from the joint surface is a curved part near the groove. is preferred. In the case of a waterproof material made of a laminated layer of one layer of hard body and one layer of elastic body, the thickness of the elastic body is equal to the depth of the groove, and the thickness of the hard body is equal to the thickness of the elastic body. It is preferable to make it the same or slightly thinner. Further, it is desirable that the shape of the hard body and/or the elastic body is selected so that a space in contact with the elastic body is formed in the waterproof material when covered with a cover sheet to be described later.

The material of the hard body is not particularly limited as long as it has relatively high strength (it is not particularly limited as long as it can sufficiently stop water with almost no deformation when pressed through the cover sheet, but for example, water-swelling rubber can be used) Synthetic rubbers such as , thermosetting resins such as Evokin resin, etc. are preferable.The material of the elastic body has sufficient flexibility, preferably 80% or more, and more preferably 100%.
Preferably, the material has a resilience close to 98%, such as foamed polyurethane, which has a resilience of about 98%.

In the case of a water stop material laminated in this way, for example, one layer of a hard material and one layer of an elastic material, the elastic material of the water stop material is tightly attached to the groove by adhesive or the like. After the hard body is positioned so as to protrude from the joint surface, a cover sheet is covered so as to straddle the joint surface and the surface of the 1111 hard body. The cover sheet may be a conventional adhesive seal such as butylcom, but it may also be a sheet with low viscosity, a smooth surface, and high mechanical strength, such as a sheet made of non-plastic polyvinyl chloride woven with polyester cloth. It is desirable that the polyvinyl chloride sheet h has good adhesion to concrete 1 and has a tensile strength of about 30 kg/ct.

In order to construct the water stop structure of the present invention using a water stop material consisting of a zigzag structure, if the water stops 4 and 1 are installed at both ji′L segments to be joined, both By bringing the water-stopping material into contact with each other via a double force bar sheet, and then pressing one or both of the unit segments from the outside to deform the elastic body of the water-stopping material, the joint surface preferably has a width smaller than that of the elastic body. A hard body of waterproof material protruding from the cover sheet is embedded in the groove, and the hard body is urged toward the other unit segment by the repulsive force of the deformed elastic body, so that the joint surface is connected to both cover sheets. It is firmly pressed together through the

In this case, it is also possible to interpose an adhesive between the two cover sheets in advance, that is, apply the adhesive to one of the unit segments in advance and then join them together, thereby integrating the double-sided bar sheets that are not integrated. This allows for a stronger structure.

Furthermore, when a water stop material is installed on one of a pair of unit segments to be joined, the joining surface of the other unit segment should be a flat surface. In this case as well, by applying pressure to the 100-unit segment from the outside, the elastic body in the water-stopping material deforms and water can be reliably stopped. However, since the pressure for stopping water is halved, the water stopping ability is slightly inferior compared to the case where the water stopping material is installed in the 100-unit segment 1.

In addition, during construction, the joint surfaces of adjacent unit segments are aligned and then joined, and in this case vertical or horizontal misalignment between the 100 unit segments may occur, leading to a decrease in work efficiency during construction. In the water stop structure of the present invention, even if such a shift occurs, it can be absorbed because the water stop material has a certain width.

(Example) Examples of the present invention will be described below with reference to the drawings, but the examples do not limit the present invention.

FIG. 1 is a vertical cross-sectional view showing an embodiment of the water stop structure according to the present invention, FIGS. 2 and 3 are enlarged views of the groove portion in FIG. 1, and FIG. A vertical cross-sectional view showing a state in which water-stopping material is arranged in the groove of the segment, and the third figure is a vertical cross-sectional view showing a state in which water can be stopped by applying pressure between both vehicle-position segments to compress the water-stopping material. , FIG. 4 shows j that can be used in the present invention.
This shows an example of the segment at position j'L, and this embodiment will be described with reference to a water-stop structure using a unit segment, not shown in Section 4H.

As shown in Fig. 4, a space 2 for inserting a bolt 1 is formed at the inner edge of both ends of the arc-shaped concrete tanning segment L-A, and a hole I and an insertion hole G are screwed between the space 2 and the outside. Further, on the inner edge of the unit segment +-A in the circumferential direction, holes I and insertion holes G are screwed at approximately equal intervals.

Horizontal trapezoidal recesses 41D are formed above the ports 1 to insertion holes G on the outer edges of both left and right ends and front and rear ends of the unit segment I-A. In the groove before construction, a notch 4 is formed in an elastic body 3 having a trapezoidal cross section and the same shape as the groove, and a notch 4 is formed in a portion that contacts both the upper and lower ends of the elastic body 3, and the left and right width is By gluing or otherwise bonding the elastic body 3, a water stop material 6 is formed, in which a hard body 5, which is slightly smaller than the elastic body 3 and has curved portions formed at both lower ends of the distal end side, is integrated by adhesion or the like. A cover sheet 8 is further covered over the outer surface of the hard body 5 and the joint surface 7 of the unit segment 1-A above and below the hard body 5 to prevent the water-stopping material 6 from falling off. .

The unit segment l-A" which is adjacent to the unit segment A and is connected to the unit segment A also has the same configuration as the unit segment, and each component is given the same reference numeral and a description thereof will be omitted. .

At the time of construction, a force is applied from the left and right directions in FIG. 2 to the pair of unit segments l-A and A' on which the water-stopping material 6 prepared as described above is attached, first bringing the cover sheaths 1-8 into contact with each other. Further force is applied to elastically deform the elastic body 3 of the waterproof material 6 so that the cover sheets 8 of both unit segments A and A" come into complete contact with each other as shown in FIG. 3. In this state, the volume of the elastic body 3 contracts, and a part of the elastic body 3 enters the notch 4, so that the hard body 5 itself hardly deforms (embedded in the groove and the joint surface 7 This allows them to come into contact with each other over almost their entire surface.

In this state, even if groundwater or the like tries to enter from the underground side (upper side in Figure 1), the elastic body 3
The hard body 5 is strongly urged toward the cover sheet 1-8 by the repulsive force of the bar sheet 8, and the double force bar sheet 8 is strongly pressed against the cover sheet 8, thereby reliably preventing the ground water from entering the channel side.

Furthermore, even if a slight gap occurs between the bonding surfaces 7 as time passes, the elastic body 3 moves the hard body 5 toward the bonding surfaces 7 to close the gap. Water can be reliably stopped for a long period of time.

In addition, in order to ensure greater safety, the hard body is made of water-swollen rubber as in the prior art, and holes are provided at required locations on the cover sheet that come into contact with the water-swollen rubber. By providing a hole in the cover sheet, groundwater entering between the two cover sheets can be absorbed into the water-swollen rubber through the through hole, thereby making it possible to reliably shut off water for a long period of time.

In order to make the water-stopping structure more reliable, an adhesive, especially an adhesive that develops adhesive ability after several hours or after the water has evaporated, is applied to an appropriate place on the cover sheet, and then an appropriate method such as jacking or One unit segment l- by spake
may be pressed against the other unit segment to join both unit segments by pressure and at the same time join by adhesive.

The type, shape, strength, etc. of each member to be used may be determined appropriately depending on the expected ingress pressure of groundwater, etc. In particular, the thickness of the water-stopping material that protrudes from the joint surface and the restoring force of the elastic body are determined to reduce the water stoppage that occurs. This should be decided carefully as it has a large impact on abilities.

In addition, in the conventional water-stopping structure shown in Fig. 6, if the joining surface of the right unit segment and the end surface of the water-stopping material are on the same plane, they will be adjacent to each other in the front and back when joining the unit segments by applying pressure. Front or rear surface of a pair of unit segments (first
(See figure) Apply pressure with a sprayer, etc.
This is because if the water stop material protrudes from the joint surface, the water stop material will be compressed and permanent deformation will remain, resulting in insufficient water stop. In contrast, in this embodiment, even when a water stop material is provided in the grooves of both adjacent unit segments, even if the water stop material is compressed with a strong force, the pressure will not be removed due to the elasticity of the elastic body of the water stop material. Since the water-stopping material is almost completely restored when the water-stopping material is removed, there is no need to position the joint surface and the end surface of the water-stopping material on the same plane, unlike in the past. One of the disadvantages is that the negative part of the unit segment comes into contact with the water-stopping material and the water-stopping material falls off before joining.In the conventional water-stopping structure, as shown in FIG. If there is a water-stopping material that is not covered, and the water-stopping material and the unit segment 1 are in direct contact with each other, or the cover sheet itself is made of an adhesive material such as butyl rubber, and the cover sheet and the unit in contact are In the prior art, falling of the water stopper from the unit segment during construction was a major problem because the segments were difficult to separate, and because the water stop material was a rigid body, it could not absorb the shock of contact.

On the other hand, in this example, all of the water-stopping materials are covered with a cover sheet, which prevents the water-stopping materials from coming into direct contact with the m-position segment. It is made of a material with high strength and low viscosity such as vinyl, and the part of the hard body that comes into contact with the cup is curved with a gentle slope so that it comes into contact with the water-stopping material. It becomes possible for the unit segment to slide on the water stop material and prevent the water stop material from falling off.

(Effects of the Invention) The present invention provides at least one layer of a hard body and at least one layer of an elastic body in at least one of the concave grooves of the adjacent unit segment l- of a structure constructed by connecting a plurality of unit segments. A waterproofing material made of a laminated layer is arranged such that the outermost hard body protrudes from the joint surface of the hard body, and the joint surface and the surface of the hard body are covered with the cover sheath I-. , has a water-stop structure in which both joint surfaces of the 100-unit segment are crimped together via the cover sheath l-.

In the conventional +lx water structure shown in Fig. 7, the water stop material is a rigid body and has a weak restoring force, so when a gap is created between unit segments, the water stop material deforms to follow the gap and close the gap. Since it cannot be removed completely, water stoppage is incomplete, and in fact, even water with a slight water pressure of about (rJ', 1 kg/c+fl) cannot be stopped.

On the other hand, the water-stopping structure of the present invention is constructed by combining an elastic body and a hard body to form a water-stopping material. Since the elastic body exclusively accepts the load and the elastic body urges the highly rigid hard body against the other unit segment by its repulsive force, a strong adhesion force is generated between the cover sheets or between the cover sheet and the joint surface. Sufficient water stoppage can be achieved.

Furthermore, since there is almost no deformation in hard bodies with high rigidity,
The rigidity of the hard body does not decrease, so there is no decrease in the adhesion force through the cover sheets 1 to 1, and water supply can be reliably performed over a length of 31J1. It is particularly useful as a water-stop structure for cables that are extremely sensitive to water.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing an embodiment of the water stop structure according to the present invention, FIGS. 2 and 3M are enlarged views of the groove portion in FIG. 1, and FIG. Fig. 3 is a vertical cross-sectional view showing a state in which water-stopping material is disposed in the groove of the vehicle; FIG. 4 shows an example of a conventional unit segment that can be used in the present invention, and FIG. 5 is a longitudinal cross-sectional view of a tunnel formed using the plurality of unit segments.
6 and 7 show a conventional water-stopping structure between unit segments 71. FIG. 6 is a vertical cross-sectional view showing a state in which water-stopping material is provided in the grooves of both unit segments. , Fig. 7 is a vertical cross-sectional view showing a state in which water can be stopped by applying pressure between 100-unit segments to compress the water-stopping material, and Fig. 8 is a longitudinal cross-sectional view showing an example of another conventional water-stopping structure. It is a front view. A...Unit segment D...Concave groove 3...Elastic body 5...Hard body 6...Water stop material 7...Joint surface 8...Cover sheet

Claims (5)

[Claims] (1) A water-stopping material formed by laminating at least one layer of a hard body and at least one layer of an elastic body in the groove of at least one of a pair of unit segments having a groove formed on the joint surface,
The outermost hard body is disposed so as to protrude from the joint surface of the unit segments, and the joint surface and the surface of the hard body are covered with a cover sheet, and both joint surfaces of the unit segments are covered with the cover sheet. Water-stop structure of unit segments that are crimped together through (2) A waterproofing material made by laminating one layer of a hard body and one layer of an elastic body is applied to both grooves of a pair of unit segments having grooves formed on the joint surface. The hard body is arranged so as to abut the groove and protrude from the joint surface of the unit segment, and the joint surface and the surface of the hard body are covered with a cover sheet, so that both the joint surfaces of the unit segments are covered with a cover sheet. A waterproof structure of unit segments formed by pressure bonding through the cover sheet. (3) The water stop structure according to claim 2, wherein the hard body is water-expandable rubber, and a through hole is formed in a portion of the cover sheet that contacts the hard body. (4) Claim 2 in which an adhesive is interposed between both cover sheets.
Water stop structure described in. (5) A water stop material made by laminating at least one layer of a hard body and at least one layer of an elastic body in the groove of at least one of a pair of unit segments having a groove formed on the joint surface,
The outermost layer of the hard body is arranged so as to protrude from the joint surface of the unit segments, and after covering the joint surface and the surface of the hard body with a cover sheet, pressure is applied from the outside to both the unit segments. A method for constructing a water-stop structure for a unit segment, the method comprising crimping both joint surfaces of the unit segment via the cover sheet.