阅读说明：本技术 高铁封闭层伸缩缝止水结构 (High-speed railway seal coat expansion joint stagnant water structure ) 是由 邓逆涛 陈锋 李泰灃 张千里 闫宏业 程远水 张栋 杜翠 王鹏程 闫鑫 尧俊凯 于 2021-07-29 设计创作，主要内容包括：本发明提供了一种高铁封闭层伸缩缝止水结构,伸缩缝形成在由混凝土浇筑成的第一结构和第二结构之间,止水结构包括设置在伸缩缝底部的止水带；止水带包括带体,带体顶面的两侧分别设置有至少一根止水肋条,止水肋条沿伸缩缝的长度方向延伸,带体顶面两侧的止水肋条分别设置在第一结构、第二结构的底部并与第一结构、第二结构浇筑为一体；止水带上方的伸缩缝内从下到上依次填充有填缝层和密封层。与现有技术相比,本发明提供的止水结构通过在止水带上设置止水肋条并浇筑在伸缩缝两侧的混凝土结构中,增加混凝土结构与止水带的结合面积,改变并延长渗水路径,有效阻止雨水渗透到路基,提高路基服役长效性。(The invention provides a water stop structure for an expansion joint of a high-speed rail sealing layer, wherein the expansion joint is formed between a first structure and a second structure which are formed by pouring concrete, and the water stop structure comprises a water stop belt arranged at the bottom of the expansion joint; the water stop belt comprises a belt body, wherein at least one water stop rib is arranged on each of two sides of the top surface of the belt body respectively, the water stop ribs extend along the length direction of the expansion joint, and the water stop ribs on the two sides of the top surface of the belt body are arranged at the bottoms of the first structure and the second structure respectively and are poured into a whole with the first structure and the second structure; the expansion joint above the water stop is sequentially filled with a joint filling layer and a sealing layer from bottom to top. Compared with the prior art, the water stop structure provided by the invention has the advantages that the water stop ribs are arranged on the water stop belt and are poured in the concrete structures at two sides of the expansion joint, the combination area of the concrete structures and the water stop belt is increased, the water seepage path is changed and prolonged, rainwater is effectively prevented from permeating a roadbed, and the service durability of the roadbed is improved.)

1. A high-speed railway seal seam expansion joint sealing structure, the expansion joint forms between first structure and the second structure poured by concrete, characterized by, the sealing structure includes the waterstop that sets up in the expansion joint bottom, the waterstop includes the area body, there is at least one sealing rib respectively on both sides of the top surface of the area body, the said sealing rib extends along the length direction of the said expansion joint, the sealing rib of one side of the top surface of the area body sets up in the bottom of the said first structure and pours as an organic whole with the said first structure, the sealing rib of the other side of the top surface of the area body sets up in the bottom of the said second structure and pours as an organic whole with the said second structure; and a joint filling layer and a sealing layer are sequentially filled in the expansion joint above the water stop from bottom to top.

2. The high-speed railway seal expansion joint sealing structure of claim 1, characterized in that the width of the top cross section of the sealing rib is larger than the width of the bottom cross section.

3. The high-speed railway seal floor expansion joint sealing structure of claim 2, characterized in that the cross section of the bottom of the water stop rib is rectangular, and the cross section of the top of the water stop rib is circular, T-shaped, L-shaped or Y-shaped.

4. The high-speed railway seal expansion joint sealing structure of claim 1, characterized in that two sides of the top surface of the belt body are respectively provided with two water-stopping ribs, and one of the two water-stopping ribs, which is closer to the middle of the belt body, has a height higher than that of the other water-stopping rib.

5. The high-speed railway seal expansion joint sealing structure of claim 1, characterized in that the top surface of the belt body is further provided with tooth grooves.

6. The high-speed rail sealing layer expansion joint water stopping structure as claimed in any one of claims 1 to 5, wherein the water stopping belt is made of rubber material.

7. The high-speed rail sealing layer expansion joint water stop structure as claimed in claim 6, wherein the water stop is made of high-strength anti-aging rubber.

8. The high-speed rail sealing layer expansion joint water stopping structure as claimed in any one of claims 1 to 5, wherein the gap filling layer is a polyethylene plate filled in the expansion joint.

9. The high-speed rail sealing layer expansion joint water stopping structure as claimed in any one of claims 1 to 5, wherein a buffering water stopping rib is arranged in the middle of the top surface of the belt body, the buffering water stopping rib extends along the length direction of the expansion joint and extends into the expansion joint, two sides of the buffering water stopping rib are tightly attached to the side walls of the expansion joint, and the sealing layer and the joint filling layer are both elastic mortar layers filled in the expansion joint.

10. The high-speed rail sealing layer expansion joint water stopping structure as claimed in any one of claims 1 to 5, wherein the first structure is a sealing layer, and the second structure is a base plate; or the first structure and the second structure are two adjacent closed layers.

Technical Field

The invention relates to the technical field of high-speed rail water prevention, in particular to a water stop structure for an expansion joint of a high-speed rail sealing layer.

Background

The longitudinal expansion joints are required to be reserved in the construction process of pouring concrete successively for the ballastless bed plate and the road shoulder sealing layer of the high-speed railway, the transverse expansion joints are required to be arranged during pouring of the sealing layer for preventing bulging and cracking of the sealing layer, and the leakage problem can occur if the treatment measures at the joint parts of the expansion joints are improper. Due to natural precipitation, rainwater on the track slab and the road shoulder flows into the foundation plate and the foundation bed at the bottom of the closed layer through the expansion joints, under the repeated suction action of dynamic loads of the train, fine particles in graded broken stones on the surface layer of the foundation bed flow out through the expansion joints of the foundation plate, the foundation plate and the expansion joints of the closed layer of the road shoulder to form slurry overflow diseases, and when more rainwater is collected, the problems of uneven settlement of the roadbed can be caused, so that the operation stability and the safety of the train are seriously influenced. The expansion joint of the ballastless track sealing layer is also a protection joint for buffering track deformation and expansion and contraction of the sealing layer.

The arrangement of a water stopping measure at an expansion joint is a common measure for preventing the leakage problem of the joint, at present, the expansion joint of a high-speed rail closed layer mostly adopts a caulking measure (see figure 8) of top sealing glue and bottom polyethylene foam board filling, specifically, the closed layers at two sides of a road shoulder are made of C25 fiber concrete, the expansion joint is longitudinally arranged along a line between ballastless track supporting layers of a C25 fiber concrete closed layer, the joint is 10mm wide, the upper part of the expansion joint is closed by silicone caulking glue, the lower part of the expansion joint is filled by polyethylene foam boards (different design houses are different in seam width, silicone caulking glue and polyethylene foam board thickness and height design), and the height of the caulking glue and the polyethylene foam boards can be adjusted according to conditions in frost heaving areas. However, in the using process, due to the insufficient aging resistance of the sealant material, the shrinkage cracking problem can occur basically for more than 2 years, the waterproof and sealing effects are invalid, the bleeding and the uneven settlement diseases occur frequently, and the long-term service of the roadbed is seriously influenced. The effective service period of the sealant is short, and the maintenance cost of the part of the work is increased due to high-frequency maintenance.

Disclosure of Invention

In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a water stop structure for an expansion joint of a high-speed rail enclosed layer, which can effectively prevent rainwater from penetrating into a roadbed through the expansion joint, and improve the service durability of the roadbed.

The invention provides a high-speed rail sealing layer expansion joint water stop structure, wherein an expansion joint is formed between a first structure and a second structure which are cast by concrete, the water stop structure comprises a water stop arranged at the bottom of the expansion joint, the water stop comprises a belt body, at least one water stop rib is arranged on each of two sides of the top surface of the belt body, the water stop ribs extend along the length direction of the expansion joint, the water stop rib on one side of the top surface of the belt body is arranged at the bottom of the first structure and is integrally cast with the first structure, and the water stop rib on the other side of the top surface of the belt body is arranged at the bottom of the second structure and is integrally cast with the second structure; and a joint filling layer and a sealing layer are sequentially filled in the expansion joint above the water stop from bottom to top.

Through set up the stagnant water rib on the waterstop and pour in the concrete structure of expansion joint both sides, increase the combined area of concrete structure and waterstop, change and extension infiltration route, after the rainwater flowed into the expansion joint, the waterstop prevented the rainwater to permeate the road bed through the bellied stagnant water rib that makes progress that closely combines with the concrete, improved road bed service longevity.

Preferably, the width of the top cross section of the water stop rib is larger than that of the bottom cross section; the water stop ribs are not easy to loosen from the concrete, the water stop belts are ensured to be closely adhered to the concrete, and rainwater is prevented from permeating into the roadbed.

Preferably, the cross section of the bottom of the water stop rib is rectangular, and the cross section of the top of the water stop rib is circular, T-shaped, L-shaped or Y-shaped. The cross section at the top of each water stop rib is circular, T-shaped, L-shaped or Y-shaped, the combination area of the water stop belt and the concrete structures on the two sides of the expansion joint is increased, the water stop ribs are not easy to loosen from the concrete, the water stop belt is guaranteed to be tightly adhered to the concrete, and rainwater is prevented from permeating into the roadbed.

Preferably, two water stop ribs are respectively arranged on two sides of the top surface of the belt body, and the height of one water stop rib which is closer to the middle part of the belt body in the two water stop ribs is higher than that of the other water stop rib; the higher the height of the water stop rib close to the middle part of the belt body is, the better the water stop effect is. Through increasing the quantity that sets up of stagnant water rib, increased the joint area of waterstop and the concrete structure of expansion joint both sides, guaranteed the inseparable adhesion with the concrete, prevent that the rainwater from permeating the road bed.

Preferably, the top surface of the belt body is also provided with a tooth socket. The combination area of the water stop and the concrete structures on two sides of the expansion joint can be increased by arranging the tooth grooves.

Preferably, the water stop is made of a rubber material. The tight connection between the concrete and the water stop rib is realized by utilizing the high elasticity and the scalability of the rubber material, so that the rainwater is further prevented from infiltrating into the foundation; meanwhile, the method is suitable for the differential deformation of the structures on the two sides, and the service durability of the roadbed is improved.

Preferably, the waterstop is made of high-strength anti-aging rubber, so that the service life of the waterstop is prolonged, and the service durability of the roadbed is improved.

Preferably, the gap filling layer is a polyethylene plate filled in the expansion joint.

Preferably, the middle part of the top surface of the belt body is provided with a buffering water stop rib, the buffering water stop rib extends along the length direction of the expansion joint and extends into the expansion joint, two sides of the buffering water stop rib are tightly attached to the side walls of the expansion joint, and the sealing layer and the joint filling layer are both elastic mortar layers filled in the expansion joint. The mortar layer is used for replacing the existing sealing layer formed by the silicone caulking glue, so that the material cost can be effectively reduced. When the elastic mortar layer is broken, diluted elastic mortar can be directly poured on the damaged elastic mortar layer for repairing, and the elastic mortar layer is not required to be completely dismantled and poured again, so that the repairing is convenient. The buffering stagnant water rib can cushion the pressure that comes from elasticity mortar bed and expansion joint both sides concrete structure to because the concrete structure of buffering stagnant water rib top both sides and the both sides at expansion joint closely laminates, thereby prevent that the rainwater from following the expansion joint and permeating to the road bed down.

Preferably, the first structure is a closed layer and the second structure is a base plate; or the first structure and the second structure are two adjacent closed layers.

Compared with the prior art, the water stop structure for the expansion joint of the high-speed rail sealing layer is characterized in that the water stop belt is arranged at the bottom of the longitudinal expansion joint between the bed plate and the sealing layer and the bottom of the transverse expansion joint between two adjacent sealing layers, the water stop ribs are arranged on the water stop belt and poured in the concrete structure on two sides of the expansion joint, the combination area of the concrete structure and the water stop belt is increased, the water seepage path is changed and prolonged, and after rainwater flows into the expansion joint, the water stop belt prevents the rainwater from permeating into a roadbed through the water stop ribs which are tightly combined with the concrete and protrude upwards, so that the long-acting property of the roadbed is improved. The tight connection between the concrete and the water stop rib is realized by utilizing the high elasticity and the scalability of the rubber material, so that the rainwater is further prevented from infiltrating into the foundation; adapt to the difference deformation of both sides structure simultaneously, improve the long-term nature of roadbed in service, solve the ageing and construction quality control degree of difficulty of current seal bed caulking material big and the sealed gluey adhesion effect of gluing is very easily influenced to the expansion joint interface unclean of clearance, and then causes the problem of separating.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of non-limiting examples only and with reference to the accompanying drawings. Wherein:

fig. 1 is a schematic structural view of an expansion joint water stop structure of a high-speed railway enclosed layer according to an embodiment of the present invention (for a longitudinal expansion joint);

fig. 2 is a schematic structural view of an expansion joint water stop structure of a high-speed railway enclosed layer according to an embodiment of the present invention (for a transverse expansion joint);

fig. 3 is a schematic structural view of an expansion joint water stop structure of a high-speed railway enclosed layer according to another embodiment of the present invention (for a longitudinal expansion joint);

fig. 4 is a schematic structural view of an expansion joint water stop structure of a high-speed railway enclosed layer according to another embodiment of the present invention (for a transverse expansion joint);

fig. 5 is a schematic structural view of an expansion joint water stop structure of a high-speed railway enclosed layer according to another embodiment of the present invention (for a longitudinal expansion joint);

fig. 6 is a schematic structural view of an expansion joint water stop structure of a high-speed railway enclosed layer according to another embodiment of the present invention (for a transverse expansion joint);

fig. 7 is a schematic structural view of an expansion joint water stop structure of a high-speed railway enclosed layer according to another embodiment of the present invention (for a longitudinal expansion joint);

fig. 8 is a schematic view of a conventional water stopping structure for a longitudinal expansion joint.

Description of reference numerals:

1. a base plate; 2. a sealing layer; 3. a sealing layer; 4. a gap filling layer; 5. a water stop; 6. a belt body; 7. a water stop rib; 8. a tooth socket; 9. buffering the water stop rib; 10. an elastic mortar layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and more complete, the following technical solutions of the present invention will be described in detail, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the specific embodiments of the present invention belong to the protection scope of the present invention.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As shown in fig. 1 and 2, the high-speed rail enclosed layer expansion joint is formed between the concrete poured foundation plate 1 and the enclosed layer 2 and between two adjacent enclosed layers 2. The high-speed rail closed layer expansion joint water stopping structure comprises a water stopping belt 5 arranged at the bottom of a longitudinal expansion joint between a base plate 1 and a closed layer 2 and a transverse expansion joint between two adjacent closed layers 2, wherein two sides of the water stopping belt 5 are respectively fixed at the edges of the base plate 1 and the closed layers 2; the expansion joint above the water stop 5 is sequentially provided with a joint filling layer 4 and a sealing layer 3. Preferably, a caulking material (e.g., a polyethylene foam plate) is filled in the expansion joint to form a caulking layer 4, and a sealant (e.g., a silicone caulking compound) is filled in the expansion joint to form a sealing layer 3. After rainwater flows into the expansion joint, the water stop 5 prevents rainwater from penetrating into the roadbed through the water stop rib 7 which is tightly combined with the base plate 1 and the closed layer 2 poured by concrete and protrudes upwards. The bed plate 1 and the closed layer 2 are both of a concrete structure.

The water stop belt 5 comprises a belt body 6, the left side and the right side of the top surface of the belt body 6 are respectively provided with a water stop rib 7, the water stop ribs 7 are fixed on the top surface of the belt body 6 and are upwards protruded, and the extending direction of the water stop ribs 7 is consistent with the length direction of the expansion joint. The water stop 5 is horizontally placed on the roadbed, and the central line of the water stop 5 is approximately aligned with the central line of the expansion joint. As shown in fig. 1, the water stop rib 7 on the right side of the top surface of the belt body 6 is arranged at the bottom of the base plate 1 on the right side of the expansion joint and is cast with the base plate 1 into a whole; the water stopping rib 7 on the left side of the top surface of the belt body 6 is arranged at the bottom of the closed layer 2 on the left side of the expansion joint and is poured into a whole with the closed layer 2. As shown in fig. 2, the water stop rib 7 on the left side of the top surface of the band body 6 is arranged at the bottom of the closed layer 2 on the left side of the expansion joint and integrally cast with the closed layer 2, and the water stop rib 7 on the right side of the top surface of the band body 6 is arranged at the bottom of the closed layer 2 on the right side of the expansion joint and integrally cast with the closed layer 2. Due to the arrangement of the water stop ribs 7, the combination area of the water stop belts 5 and the concrete structures on the two sides of the expansion joint is increased, the tight adhesion with the concrete structures is ensured, and rainwater is prevented from permeating into the roadbed. Preferably, the length of the water stop strip 5 is not less than that of the expansion joint, and when rainwater flows into the expansion joint, the rainwater can flow into the outer end of the expansion joint along the strip body 6 between the two water stop ribs 7 and further flow into the roadbed drainage ditch.

The water stop 5 is preferably a rubber water stop 5 made of rubber material, and the rubber water stop 5 has high elasticity and elasticity, can be tightly adhered to concrete and can adapt to the difference deformation of concrete structures on two sides of the expansion joint. Further preferably, the water stop 5 is preferably made of high-strength anti-aging rubber, so that the water stop 5 has strong deformation capability and high fatigue resistance at the same time, and thus the bonding capability with concrete, the waterproof effect and the durability in use are achieved.

Taking the water stop structure of the high-speed rail sealing layer expansion joint shown in fig. 1 as an example, before the base plate 1 is poured, one side of the rubber water stop 5 is fixed at the edge of the base plate 1, the water stop rib 7 is fully combined with concrete in the concrete pouring process of the base plate 1, and the water stop 5 reserved outside the base plate 1 needs to be protected in the construction process.

When pouring the concrete of the sealing layer 2, the other side of the water stop belt 5 is fixed at the edge of the sealing layer 2 which needs to be poured correspondingly, the expansion joints of the base plate 1 and the sealing layer 2 are filled with polyethylene plates, and the water stop rib 7 is fully combined with the concrete in the process of pouring the concrete of the sealing layer 2.

In order to further increase the combination area of the water stop belt 5 and the concrete structures at the two sides of the expansion joint, the water stop rib is not easy to loosen from the concrete, the tight adhesion with the concrete is ensured, the rainwater is prevented from permeating the roadbed, the water stop rib 7 can be designed into a structure that the cross section of the bottom is rectangular, the cross section of the top is circular, and the circular diameter is larger than the width of the rectangle.

In order to improve the waterproof capability of the water stop 5, the number of the water stop ribs 7 can be increased, and the combination area of the water stop ribs 7 and the concrete structures on the two sides of the expansion joint is further increased. As shown in fig. 3 and 4, two water stop ribs 7 are provided on each of the left and right sides of the top surface of the belt body 6, and preferably, the height of the two water stop ribs 7 located on the same side decreases as the distance from the center line of the belt body 6 increases.

As shown in fig. 5 and 6, in order to improve the waterproof capability of the water stop 5, a tooth socket 8 is further provided on the top surface of the belt body 6 between the two water stop ribs 7, so as to further increase the bonding area between the water stop 5 and the concrete structure on both sides of the expansion joint.

As shown in fig. 7, a buffering water-stop rib 9 is arranged in the middle of the top surface of the belt body 6, the buffering water-stop rib 9 extends along the length direction of the expansion joint and extends into the expansion joint, and two sides of the top end of the buffering water-stop rib 9 are tightly attached to the concrete structures at two sides of the expansion joint. The expansion joint above the buffering water stop rib 9 is filled with elastic mortar to form an elastic mortar layer 10. The elastic mortar layer 10 can play a role in supporting the expansion joint and sealing the top of the expansion joint, namely the elastic mortar layer 10 has the functions of the joint filling layer 4 and the sealing layer 3. Buffering stagnant water rib 9 can cushion the pressure that comes from elasticity mortar layer 10 and expansion joint both sides concrete structure to because the concrete structure of buffering stagnant water rib 9 top both sides and the both sides at expansion joint closely laminates, thereby prevent that the rainwater from following the expansion joint and permeating to the road bed down.

Finally, it should be noted that: the above embodiments and examples are only used to illustrate the technical solution of the present invention, but not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments and examples, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments or examples may still be modified, or some of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments or examples of the present invention.