Open cut tunnel deformation joint intelligent sensing externally-attached type water stop belt

Abstract

The utility model discloses an open-cut tunnel deformation joint intelligent sensing externally-pasted waterstop which comprises a waterstop body, a water pressure monitoring module and a resistance monitoring module are arranged on the waterstop body and used for monitoring water pressure changes and resistance changes on the waterstop body respectively, and the resistance monitoring module comprises a plurality of water leakage sensing rope optical cables. The water pressure monitoring module comprises a plurality of fiber bragg grating water pressure gauges, and the fiber bragg grating water pressure gauges are arranged on the water stop belt in a linear array mode and axially extend along the two side edges of the water stop belt. According to the scheme, starting from the design characteristics of the waterstop, the monitoring modules are arranged in the vertical ridges and the cavity, the outer side of the induction rope is provided with the shell for protection, other factors influencing water leakage are eliminated, and the water seepage condition in a tunnel can be monitored in real time by collecting the water pressure change in the waterstop; and meanwhile, a leakage point can be quickly positioned through the arranged water leakage induction rope cable, the preventive maintenance work of deformation joint leakage water is efficiently improved, and the intelligent tunnel management and maintenance requirements are met.

Description

Technical Field

[0001] The utility model belongs to the field of tunnel leakage, and particularly relates to an externally bonded waterstop with intelligent perception for deformation joints of open-cut tunnels. Background Technique

[0002] The construction technology of open-cut method for tunnels has now become one of the important alternative schemes for underwater tunnel construction. According to statistics, the leakage of tunnel deformation joints accounts for about 80% of the number of tunnel leakage points and is the key point of tunnel waterproofing. Under the long-term action of seepage water, structural components may be eroded and damaged, affecting the safety and stability of the tunnel structure.

[0003] The waterproofing of deformation joints mainly adopts the form of externally bonded waterstop + embedded steel plate rubber waterstop + internally installed removable waterstop. Affected by the thermal expansion and contraction of concrete, uneven settlement of the foundation, and non-compact vibration of the concrete around the waterstop, the waterstop of the deformation joint may fail, ultimately leading to the problem of water leakage at the deformation joint. The externally bonded waterstop is set on the water-facing side of the tunnel structure and directly contacts the external water and soil. It is the primary link for the waterproofing of deformation joints, and its waterproof effect directly determines the evolution process of seepage water diseases. Therefore, by real-time monitoring the state of the waterstop and evaluating its performance, the evolution process of seepage water diseases can be predicted in advance, early warning can be given in a timely manner, and at the same time, providing the location information of seepage water can provide great convenience for operation, maintenance, inspection and repair.

[0004] At present, the monitoring of tunnel leakage is mainly carried out by temperature or strain sensing optical cables on the surface of deformation joints, and it cannot monitor the external seepage water of the tunnel in real time. At the same time, the externally bonded waterstop only has the function of waterstop, and there is no function of real-time dynamic monitoring of the seepage state in the tunnel and the waterproof performance of the deformation joint, so it is difficult to extract and predict the evolution process of seepage water diseases, and it is difficult to realize the real-time dynamic monitoring of tunnel seepage water. Summary of the Invention

[0005] In order to solve the above technical defects in the prior art, the utility model provides an externally bonded waterstop with intelligent perception for deformation joints of open-cut tunnels, which not only has the function of waterstop, but also can monitor the seepage state in the tunnel in real time.

[0006] The technical solution for realizing the purpose of the utility model is as follows:

[0007] An externally bonded waterstop with intelligent perception for deformation joints of open-cut tunnels includes a waterstop, and a water pressure monitoring module and a resistance monitoring module are arranged on the waterstop, which are respectively used for monitoring the water pressure change and resistance change on the waterstop.

[0008] Further, the resistance monitoring module includes a plurality of leakage sensing rope optical cables.

[0009] Further, the waterstop is provided with a cavity, and leakage sensing rope optical cables are arranged on the surface of the waterstop and in the cavity.

[0010] Furthermore, an arc-shaped hollow PVC shell is arranged outside the leakage induction rope optical cable on the surface of the water stop belt.

[0011] Furthermore, the arc-shaped hollow PVC shell is coated with insulating paint.

[0012] Furthermore, the water pressure monitoring module includes a plurality of fiber Bragg grating water pressure gauges, which are arranged in a linear array on the water stop belt and axially extend along both sides of the water stop belt.

[0013] Furthermore, ribs are arranged on both sides of the water stop belt.

[0014] Furthermore, the water pressure monitoring module and the resistance monitoring module are coupled and fixed to the water stop belt through epoxy resin.

[0015] Furthermore, a plurality of vertical ribs are arranged on the water stop belt.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) Through collecting the change of water pressure inside the water stop belt, the present utility model scheme can detect the water seepage situation in the tunnel in real time. At the same time, the leakage induction rope cable set can quickly locate the leakage point, efficiently improve the preventive maintenance work for the water leakage of the deformation joint, and meet the requirements of intelligent tunnel management and maintenance.

[0018] (2) Starting from the design characteristics of the water stop belt itself, the present utility model scheme sets monitoring modules in the vertical ribs and cavities, and sets a shell protection outside the induction rope, eliminating other factors affecting water leakage and protecting the monitoring modules, reducing the problem of intelligent perception failure of the water stop belt.

[0019] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the intelligent perception external paste type water stop belt for the deformation joint of the open-cut tunnel in the embodiment of the present utility model.

[0021] Figure 2 It is a schematic structural diagram of the inner paste surface of the intelligent perception external paste type water stop belt for the deformation joint of the open-cut tunnel in the embodiment of the present utility model.

[0022] Figure 3 It is a schematic diagram of the use of the intelligent perception external paste type water stop belt for the deformation joint of the open-cut tunnel in the tunnel deformation joint in the embodiment of the present utility model.

[0023] Figure 4This is a schematic structural diagram of the leakage induction rope optical cable at the waterstop strip for intelligent perception of the deformation joint of an open-cut tunnel in the embodiment of the present utility model. Detailed implementation manners

[0024] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can imagine various implementation manners of the present utility model. Therefore, the following detailed implementation manners and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as all of the present utility model or as a limitation or restriction on the technical solution of the present utility model. On the contrary, the purpose of providing these embodiments is to enable those skilled in the art to understand the present utility model more thoroughly. The preferred embodiments of the present utility model will be specifically described below with reference to the drawings, where the drawings form a part of this application and are used together with the embodiments of the present utility model to explain the innovative concept of the present invention.

[0025] Embodiment

[0026] Combined with Figures 1 to 4 , an externally bonded waterstop strip for intelligent perception of the deformation joint of an open-cut tunnel includes a waterstop strip 5. In this embodiment, the waterstop strip 5 is selected as an EB-type externally bonded waterstop strip. A water pressure monitoring module and a resistance monitoring module are arranged on the waterstop strip 5, which are respectively used to monitor the water pressure change and resistance change on the waterstop strip 5.

[0027] In this embodiment, the resistance monitoring module includes a plurality of leakage induction rope optical cables 1. A cavity 3 is arranged at the middle position of the waterstop strip 5. The leakage induction rope optical cables 1 are arranged on the surface of the waterstop strip 5 and in the cavity 3. In this embodiment, the leakage induction rope optical cables 1 are arranged on both sides of the waterstop strip 5 and in the cavity 3 at the middle position respectively. The positioning sensing wire in the leakage induction rope optical cable 1 is used to monitor the resistance of the contact surface of the waterstop strip, so as to achieve precise positioning of the leakage point;

[0028] In addition, arc-shaped hollow PVC shells 4 are arranged outside the leakage induction rope optical cables 1 on both sides of the surface of the waterstop strip 5. Openings 7 are arranged on the arc-shaped hollow PVC shells 4, and insulating paint is coated on the arc-shaped hollow PVC shells 4. On the one hand, it avoids the influence of the leakage induction rope by steel bars, metals and humidity, and on the other hand, it ensures that the induction rope is not damaged during the concrete pouring process and triggers an alarm when a leakage event occurs.

[0029] In this embodiment, the water pressure monitoring module includes a plurality of fiber Bragg grating water pressure gauges 2. The plurality of fiber Bragg grating water pressure gauges 2 are arranged in a linear array on the water stop 5 and axially extend along both side edges of the water stop 5. The fiber Bragg grating water pressure gauges 2 are connected in series. In this embodiment, the fiber Bragg grating water pressure gauges 2 are arranged on both sides of the water stop 5. The arrangement distance between the fiber Bragg grating water pressure gauges 2 is between 1 and 2 meters. The measurement range of the fiber Bragg grating water pressure gauge (2) is 0.2 MPa, the accuracy is higher than 0.5% F.S, and the outer diameter is 22 mm.

[0030] In this embodiment, the fiber Bragg grating water pressure gauges 2 of the water pressure monitoring module and the leakage induction rope optical cable 1 of the resistance monitoring module are coupled and fixed to the water stop 5 through epoxy resin.

[0031] In addition, convex ribs are provided on both sides of the water stop 5, and a plurality of vertical ribs are provided on the surface of the water stop 5, so that the water stop 5 can directly achieve a dense bite with the cast-in-place concrete during use, playing the role of sealing water stop and fixing the grouting pipe.

[0032] In actual use, the water stop 6 of this solution is arranged at the deformation joint 6 of the tunnel. The water seepage situation in the tunnel can be monitored in real time through the fiber Bragg grating water pressure gauges 2 and the leakage induction rope optical cable 1. At the same time, the leakage point can be quickly located, and the preventive maintenance work on the water leakage of the deformation joint can be efficiently improved, meeting the requirements of intelligent tunnel management and maintenance.

[0033] The above embodiments show and describe the basic principles and main features of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An externally bonded waterstop for intelligent perception of deformation joints in an open-cut tunnel, characterized in that, It includes a waterstop (5), and a water pressure monitoring module and a resistance monitoring module are arranged on the waterstop (5) for monitoring the water pressure change and resistance change on the waterstop (5) respectively; The resistance monitoring module includes a plurality of leakage induction rope optical cables (1); The waterstop (5) is provided with a cavity (3), and leakage induction rope optical cables (1) are arranged on the surface of the waterstop (5) and in the cavity (3); The water pressure monitoring module includes a plurality of fiber Bragg grating water pressure gauges (2), and the plurality of fiber Bragg grating water pressure gauges (2) are arranged in a linear array on the waterstop (5) and axially extend along both side edges of the waterstop (5).

2. The externally bonded waterstop for intelligent perception of deformation joints of open-cut tunnels according to claim 1, wherein An arc-shaped hollow PVC outer shell (4) is arranged outside the leakage induction rope optical cable (1) on the surface of the waterstop (5).

3. The externally bonded waterstop for intelligent perception of deformation joints in open-cut tunnels according to claim 2, wherein An insulating paint is coated on the arc-shaped hollow PVC outer shell (4).

4. The externally bonded waterstop for intelligent perception of deformation joints in open-cut tunnels according to claim 1, characterized in that, Convex ribs are arranged on both sides of the waterstop (5).

5. The externally bonded waterstop for intelligent perception of deformation joints in open-cut tunnels according to claim 1, characterized in that, The water pressure monitoring module and the resistance monitoring module are coupled and fixed to the waterstop (5) through epoxy resin.

6. The externally bonded waterstop for intelligent perception of deformation joints of open-cut tunnels according to claim 1, characterized in that A plurality of vertical ribs are arranged on the waterstop (5).

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