Secondary lining V-groove rubber strips for tunnel formwork trolleys and their use

Abstract

A secondary lining V-groove rubber strip for use with a tunnel formwork trolley and a method for use, comprising a main body having a triangular cross-section and made of rubber; a plurality of reinforcing ribs located inside the main body and evenly distributed along the length of the main body; a plurality of handles, one end of each handle being fixedly connected to the reinforcing rib inside the main body, and the other end extending out of the main body and having a bent portion; reinforcing ribs are added inside the rubber strip to enhance the strength of the rubber strip itself, thereby increasing the number of times the rubber strip is reused; after the formwork trolley is in place, the position of the rubber strip is precisely controlled at the end of the formwork trolley by operating the handle, thereby facilitating positioning of the rubber strip and the V-groove, and avoiding the use of steel nails to fix the rubber strip in advance, thereby avoiding damage to the rubber strip and the completed secondary lining structure.

Description

Technical field:

[0002] The invention belongs to the technical field of tunnel construction, and mainly relates to a secondary lining V-groove rubber strip matched with a tunnel formwork trolley and a use method thereof. Background technology:

[0004] During the secondary lining construction of the tunnel, in order to prevent common defects such as concrete cracking and local block falling at the circumferential construction joints of the lining, triangular rubber strips are installed at the lining construction joints to reserve V-shaped grooves.

[0005] like Figure 1 and 2 As shown, the existing method is that after the trolley template 3 is fixed, the secondary lining is poured. The front end of the trolley template 3 is provided with a triangular protrusion, which can form a slope A at the lower end of the interface of the secondary lining. Then the staff will press the inclined surface of the triangular rubber strip 2 against the slope A, and use steel nails 5 to fix the rubber strip 2 to the already formed secondary lining 1. The trolley moves forward, and after the end of the trolley template 3 moves to the lower end of the rubber strip, the trolley template 3 is raised, and the rubber strip 2 is pressed, and then the front secondary lining 4 is poured. Due to the support of the other side of the rubber strip 2, a slope B is also formed below the end of the front secondary lining 4, and the slopes A and B form a V-shaped groove.

[0006] However, there are many drawbacks in the above method:

[0007] 1) The strength of the adhesive strip 2 is insufficient. After being used 3-5 times, the adhesive strip is easily damaged and cannot be reused.

[0008] 2) The rubber strip 2 is fixed to the completed secondary lining 1 with steel nails 5, causing damage to the original structure and also causing damage to the rubber strip 2.

[0009] 3) When workers use steel nails to fix the rubber strip 2, it is considered high-altitude work, which poses a great safety hazard.

[0010] 4) If the rubber strip 2 falls off during the installation process, due to the narrow space between the formwork trolley and the secondary lining, the formwork trolley needs to be moved again to reset the rubber strip, which seriously affects the construction time of the secondary lining and increases the safety risks of high-altitude operations. Summary of the invention:

[0012] In order to overcome the above-mentioned shortcomings, the present invention provides a second-lining V-groove rubber strip and a method of use for a tunnel formwork trolley. Several reinforcing ribs are added to the rubber strip to ensure that the rubber strip will not deform after repeated use, thereby extending the service life of the rubber strip. At the same time, a handle is added to the rubber strip to facilitate adjustment of the rubber strip to align with the construction joint. No steel nails are required for fixing, thereby reducing damage to the rubber strip and further extending the service life of the rubber strip.

[0013] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0014] A secondary lining V-groove rubber strip for a tunnel formwork trolley, comprising

[0015] A body, wherein the cross section of the body is triangular and the material of the body is rubber;

[0016] A plurality of reinforcing ribs, wherein the reinforcing ribs are located inside the body and are evenly distributed along the length of the body;

[0017] A plurality of handles, one end of each handle being fixedly connected to the reinforcing rib inside the body, and the other end extending out of the body and having a bent portion;

[0018] The handle is used to adjust the position of the body on the trolley template so that the central axis of the body is collinear with the edge of the secondary lining.

[0019] The handle is located at the bottom of the body and is arranged perpendicular to the axis of the body.

[0020] The thickness of the handle is 1-3 mm, and the distance between the handles on the body is 1-3 mm.

[0021] A method for using a secondary lining V-groove rubber strip for a tunnel formwork trolley includes the following steps:

[0022] 1) After the formwork trolley is in place and the formwork is fixed in place, the secondary lining is poured. After the secondary lining is formed, the trolley formwork is moved away from the secondary lining. The triangular protrusion at the front end of the trolley formwork forms a slope A at the bottom of the front end of the secondary lining;

[0023] 2) The trolley moves forward to the next workstation, places the rubber strip at the end of the trolley template, pulls the bent part of each handle of the rubber strip, and adjusts the position of the rubber strip so that the center axis of the rubber strip is collinear with the edge line of the secondary lining;

[0024] 3) Move the trolley template until one side of the rubber strip is in close contact with the slope A of the secondary lining, and the trolley template presses the handle against the bottom surface of the secondary lining, at which point the rubber strip is fixed in place;

[0025] 4) Pour the first and second linings until they are solidified and formed, and move the trolley template away from the first and second linings. The rear end bottom of the first and second linings forms a slope B, and the slopes A and B form a V-shaped groove.

[0026] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0027] The present invention provides a secondary lining V-groove rubber strip for use with a tunnel formwork trolley and a method for use. On the basis of the original rubber strip, reinforcing ribs are added inside the rubber strip to enhance the strength of the rubber strip itself, thereby increasing the number of times the rubber strip can be reused. An operating handle is added to the rubber strip. After the formwork trolley is in place, the position of the rubber strip is accurately controlled at the end of the formwork trolley through the operating handle, which facilitates the positioning of the rubber strip and the V-groove and avoids the use of steel nails to fix the rubber strip in advance, thereby causing damage to the rubber strip and the completed secondary lining structure. Even if the formwork trolley moves or the rubber strip falls off, the position of the rubber strip can be simply repositioned through the operating handle at the end of the formwork trolley. Description of the drawings:

[0029] Figure 1 This is a schematic diagram of the structure after the existing trolley formwork and secondary lining are separated;

[0030] Figure 2 This is a schematic diagram of the structure of the existing trolley formwork before pouring and after secondary lining;

[0031] Figure 3 Schematic diagram of the structure of the adhesive strip of the present invention;

[0032] Figure 4 is a side view of the adhesive strip of the present invention;

[0033] Figure 5 This is a schematic diagram of the position of the rubber strip when the trolley of the present invention is in place;

[0034] Figure 6 This is a schematic diagram of the adhesive strip of the present invention when it is adjusted into place;

[0035] Figure 7 This is a schematic diagram of the trolley template of the present invention when it is lifted into place;

[0036] Figure 8 This is a schematic diagram after the secondary lining pouring is completed;

[0037] In the figure: 1. Secondary lining; 2. Rubber strip; 3. Trolley template; 4. Front secondary lining; 5. Steel nails; 21. Main body; 22. Reinforcement rib; 23. Handle. Specific implementation method:

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0041] Combined with attachment Figure 3 and 4 The second lining V-groove rubber strip matched with the tunnel formwork trolley includes:

[0042] The body 21 has a triangular cross-section, and two side surfaces can fit into the V-shaped groove. The body 21 is made of rubber, which has certain toughness and elasticity. Good toughness can extend the service life of the rubber strip 2, and good elasticity can meet the bending performance of the rubber strip and fit better when filling the V-shaped groove;

[0043] Multiple reinforcing ribs 22 are located within the body 21 and evenly distributed along its length. The ribs 22 are made of steel cord, iron wire, steel wire, or a woven metal mesh. The arrangement of the reinforcing ribs 22 increases the strength of the rubber strip 2, extending its service life and increasing its pressure resistance. This minimizes deformation when squeezed by the trolley template 3, ensuring that the V-grooves between the linings will not deform later.

[0044] A plurality of handles 23, one end of each handle 23 being fixedly connected to the reinforcing rib 22 inside the body 21, and the other end extending out of the body 21 and having a bent portion for easy gripping by the operator;

[0045] The handle 23 is used to adjust the position of the body 21 on the trolley template 3 so that the central axis of the body 21 is collinear with the edge of the secondary lining 1 .

[0046] The handle 23 is located at the bottom of the body 21 and is arranged perpendicular to the axis of the body 21. With this arrangement, after the trolley template 3 lifts the rubber strip 2, the trolley template 3 can squeeze the handle 23 to the bottom of the secondary lining 1. If the handle 23 is not set at the bottom of the body 21, or there is an inclination angle with the central axis of the body 21, then after the handle 23 is squeezed, the body 21 will be deformed, affecting the forming of the V-groove between the linings.

[0047] The thickness of the handle 23 is 1-3 mm, and the distance between the handle 23 on the body 21 is 1-3 m.

[0048] like Figure 5-8As shown, a method for using the secondary lining V-groove rubber strip for a tunnel formwork trolley includes the following steps:

[0049] 1) After the formwork trolley 3 is in place and the formwork is fixed in place, the secondary lining 1 is poured. After the secondary lining 1 is formed, the trolley formwork 3 is moved away from the secondary lining. The triangular protrusion at the front end of the trolley formwork 3 forms a slope A at the bottom of the front end of the secondary lining 1;

[0050] 2) The trolley moves forward to the next workstation, and the rubber strip 2 is placed at the end of the trolley template 3. The bent portion of each handle 23 of the rubber strip 2 is pulled, and the position of the rubber strip on the end of the template is adjusted so that the central axis of the rubber strip 2 is collinear with the edge line of the secondary lining 1, and the bent portion of the handle 23 extends out of the template with the bend facing downward;

[0051] 3) Move the trolley template 3 until one side of the rubber strip 2 is in close contact with the slope A of the secondary lining 1, and the trolley template 3 presses the horizontal part of the handle 23 against the bottom surface of the secondary lining 1. At this time, the rubber strip 2 is fixed in place and will not move;

[0052] 4) Pour the first secondary lining 4 until it solidifies and takes shape, and then move the trolley template 3 away from the first secondary lining 4. The rear end bottom of the first secondary lining 4 forms a slope B, and the slopes A and B form a V-shaped groove.

[0053] The above steps complete the V-shaped groove between two adjacent secondary linings. In actual construction, steps 2-4 must be repeatedly implemented in the tunnel to complete the V-shaped groove between each secondary lining.

[0054] The present invention provides a secondary lining V-groove rubber strip for use with a tunnel formwork trolley and a method for use. On the basis of the original rubber strip, reinforcing ribs are added inside the rubber strip to enhance the strength of the rubber strip itself, thereby increasing the number of times the rubber strip can be reused. An operating handle is added to the rubber strip. After the formwork trolley is in place, the position of the rubber strip is accurately controlled at the end of the formwork trolley through the operating handle, which facilitates the positioning of the rubber strip and the V-groove and avoids the use of steel nails to fix the rubber strip in advance, thereby causing damage to the rubber strip and the completed secondary lining structure. Even if the formwork trolley moves or the rubber strip falls off, the position of the rubber strip can be simply repositioned through the operating handle at the end of the formwork trolley.

[0055] The parts not described in detail in the above content are prior art and are therefore not described in detail.

Claims

1. A secondary lining V-groove rubber strip for a tunnel formwork trolley, characterized by: include A body, wherein the cross section of the body is triangular and the material of the body is rubber; A plurality of reinforcing ribs, wherein the reinforcing ribs are located inside the body and are evenly distributed along the length of the body; A plurality of handles, one end of each handle being fixedly connected to the reinforcing rib inside the body, and the other end extending out of the body and having a bent portion; Wherein, the handle is used to adjust the position of the body on the trolley template so that the central axis of the body is collinear with the edge of the secondary lining; The handle is located at the bottom of the body and is arranged perpendicular to the axis of the body. After the trolley template lifts the rubber strip, the trolley template can squeeze the horizontal part of the handle to the bottom of the secondary lining.

2. The secondary lining V-groove rubber strip for the tunnel formwork trolley according to claim 1 is characterized by: The thickness of the handle is 1-3 mm, and the distance between the handles on the body is 1-3 mm.

3. A method for using the secondary lining V-groove rubber strips for a tunnel formwork trolley, characterized by: The method comprises the following steps: 1) After the formwork trolley is in place and the formwork is fixed in place, the secondary lining is poured. After the secondary lining is formed, the trolley formwork is moved away from the secondary lining. The triangular protrusion at the front end of the trolley formwork forms a slope A at the bottom of the front end of the secondary lining; 2) The trolley moves forward to the next workstation, places the rubber strip at the end of the trolley template, pulls the bent part of each handle of the rubber strip, and adjusts the position of the rubber strip so that the center axis of the rubber strip is collinear with the edge line of the secondary lining; 3) Move the trolley template until one side of the rubber strip is in close contact with the slope A of the secondary lining, and the trolley template presses the handle against the bottom surface of the secondary lining, at which point the rubber strip is fixed in place; 4) Pour the first and second linings until they are solidified and formed, and move the trolley template away from the first and second linings. The rear end bottom of the first and second linings forms a slope B, and the slopes A and B form a V-shaped groove.

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