A concrete guardrail structure with secondary transformation and a construction method for increasing the height of the guardrail structure

Abstract

The present invention relates to the technical field of road administration construction, in particular to a concrete guardrail structure for secondary transformation and a construction method for increasing the height of the guardrail structure. The guardrail structure includes a lower guardrail and an upper guardrail. The lower guardrail is provided with an opening extending to the ground layer. The upper guardrail includes a support leg inserted into the opening and a guardrail part integrally provided at the top of the support leg. The support leg is integrally supported on the ground layer, the guardrail part is located above the lower guardrail, and there is a gap between the support leg and the lower guardrail; a lower positioning part is provided at the top of the lower guardrail, an upper positioning part is provided at the bottom of the guardrail part, a first vibration isolation gap is provided between the upper positioning part and the lower positioning part, and the upper positioning part can cooperate with the lower positioning part when moving laterally relative to the lower positioning part to stop the lateral movement of the guardrail part relative to the lower guardrail. By improving the structure and construction method for increasing the height of the guardrail, the present invention can make the guardrail not easily affected by vibration damage after height increase, and can also be stably connected, effectively solving the problems existing in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of road administration construction, in particular to a concrete guardrail structure for secondary transformation and a construction method for increasing the height of the guardrail structure. Background Art

[0002] The concrete anti-collision guardrail is an important protective structure on the road bridge. During the construction of road surface height increase or the process of upgrading and transformation, there are often working conditions where the height of the existing anti-collision guardrail is insufficient, unable to meet the safety protection requirements. In some working conditions, it is necessary to demolish the original guardrail and rebuild it, and this method has a large amount of labor and material consumption. Some existing technologies, such as a new and old concrete connection structure for a height-increased concrete anti-collision guardrail in the working condition with the patent application number 2021201441628, connect the new concrete to the existing guardrail by implanting steel bars into the existing guardrail and then pouring concrete for the second time. There are the following problems with this method. First, the bonding property between the upper and lower sections of concrete is poor and prone to delamination. Especially after the vibration transmitted by the vehicles driving on the road bridge is transmitted to the existing guardrail, the vibration accumulates at the interface between the new and old concrete, and it is easier for separation and cracks to occur between the new and old concrete. As a result, the connection between the new and old concrete mainly relies on the implanted steel bars, resulting in unstable connection and low strength. Moreover, the steel bars implanted into the old concrete mainly have two methods: mechanical tensioning implantation and bonding. Under the high-frequency vibration of the hoop bars, the connection stability of the implanted steel bars is also difficult to guarantee. Summary of the Invention

[0003] The present invention provides a concrete guardrail structure for secondary transformation and a construction method for increasing the height of the guardrail structure. By improving the structure and construction method for increasing the height of the guardrail, the strength of the guardrail after height increase is not easily affected by vibration damage, and the connection is stable, effectively solving the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve the above technical problems is a concrete guardrail structure for secondary transformation, including a lower guardrail and an upper guardrail arranged on the upper side of the lower guardrail. The lower guardrail is provided with an opening extending to the ground layer. The upper guardrail includes a support leg inserted into the opening and a guardrail part integrally arranged at the top of the support leg. The support leg is integrally supported on the ground layer, the guardrail part is located on the upper side of the lower guardrail, and there is a gap between the support leg and the lower guardrail; a lower positioning part is arranged at the top of the lower guardrail, an upper positioning part is arranged at the bottom of the guardrail part, a first vibration isolation gap is arranged between the upper positioning part and the lower positioning part, and when the upper positioning part moves horizontally relative to the lower positioning part, it can cooperate with the lower positioning part to stop the horizontal movement of the guardrail part relative to the lower guardrail.

[0005] Further, the opening penetrates one side of the lower guardrail, and the upper guardrail includes at least two support legs, and at least two of the support legs in the same upper guardrail are respectively located on both sides of the lower guardrail.

[0006] Further, the guardrail structure further includes a vibration isolation support part filled in the first vibration isolation gap.

[0007] Further, the vibration isolation support part is integrally cast and connected to the bottom of the upper guardrail. The vibration isolation support part includes a deformable vibration isolation layer and a rigid layer arranged at intervals on the top of the vibration isolation layer. The rigid layer is integrally cast in the upper guardrail through steel bars.

[0008] Further, the lower guardrail is provided with a connection hole penetrating the lower guardrail at the lower section of the opening;

[0009] The guardrail structure further includes a lower connection part. The lower connection part includes a connecting piece passing through the connection hole. One end of the connecting piece is connected to the support leg corresponding to the position of the connection hole, and the other end passes through the connection hole and is fixed to the other end of the lower guardrail;

[0010] A second vibration isolation gap is provided between the connecting piece and the lower guardrail.

[0011] Further, the guardrail structure further includes a strengthening cable. The upper end of the strengthening cable is integrally cast in the guardrail, and the lower end is connected to the lower guardrail.

[0012] Further, the lower positioning part is a lower positioning surface arranged on the top of the lower guardrail. The lower positioning surface is arranged to be inclined, and the lower guardrail is provided with a plurality of the lower positioning surfaces, and the inclination directions of at least two of the lower positioning surfaces are opposite.

[0013] Further, the support leg is anchored to the ground layer through an anchor.

[0014] The present invention also provides a construction method for increasing the height of a guardrail structure, including:

[0015] S1. Open an opening in the lower guardrail extending to the ground layer;

[0016] S2. Process a lower positioning part on the top of the lower guardrail;

[0017] S3. Make an upper guardrail mold at the upper side and the opening position of the lower guardrail;

[0018] S4. Pour and form the upper guardrail, and remove at least the side part of the upper guardrail mold.

[0019] Further, before S3,

[0020] Install an anchor anchored to the ground layer at the opening position, and integrally cast the anchor in the support leg.

[0021] The beneficial effects of the present invention are as follows. By improving the structure and construction method of the guardrail height increase, the strength of the guardrail after height increase is not easily affected by vibration damage, and the connection is stable, effectively solving the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the guardrail in an embodiment of the present invention.

[0023] Figure 2 For Figure 1 It is a schematic structural diagram of the upper guardrail in the shown embodiment.

[0024] Figure 3 For Figure 1 It is a schematic structural diagram of the lower guardrail after opening in the shown embodiment.

[0025] Figure 4 For Figure 1 It is a schematic lateral sectional structural diagram of the guardrail structure at the support leg in the shown embodiment.

[0026] In the figure, 1, lower guardrail; 2, upper guardrail; 201, support leg; 202, guardrail part; 3, opening; 4, lower positioning part; 5, upper positioning part; 6, first vibration isolation gap; 7, anchor; 8, vibration isolation support part; 801, vibration isolation layer; 802, rigid layer; 9, connection hole; 10, connecting piece; 11, strengthening cable. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To clearly illustrate the technical features of the present solution, the present invention will be described in detail below through specific embodiments and in conjunction with its drawings.

[0028] The embodiment of the present invention is as Figures 1-4 shown. A concrete guardrail structure for secondary renovation includes a lower guardrail 1 and an upper guardrail 2 disposed on the upper side of the lower guardrail 1. The lower guardrail 1 is provided with an opening 3 extending to the ground layer. The upper guardrail 2 includes a support leg 201 inserted into the opening 3 and a guardrail part 202 integrally provided at the top of the support leg 201. The support leg 201 is integrally supported on the ground layer, and the guardrail part 202 is located on the upper side of the lower guardrail 1. There is a gap between the support leg 201 and the lower guardrail 1. A lower positioning part 4 is provided at the top of the lower guardrail 1, and an upper positioning part 5 is provided at the bottom of the guardrail part 202. A first vibration isolation gap 6 is provided between the upper positioning part 5 and the lower positioning part 4, and the upper positioning part 5 can cooperate with the lower positioning part 4 when moving laterally relative to the lower positioning part 4 to stop the lateral movement of the guardrail part 202 relative to the lower guardrail 1.

[0029] The guardrail structure of the present invention places the support leg 201 through the opening 3 provided in the lower guardrail 1. In this application, a separate support leg 201 is provided to directly support the upper guardrail 2 on the ground. There is a first vibration isolation gap 6 between the upper positioning portion 5 and the lower positioning portion 4, so that the upper guardrail 2 and the lower guardrail 1 do not directly transmit vibration between the two positioning portions, thereby reducing the structural damage to the positions of the upper positioning portion 5 and the lower positioning portion 4 caused by vibration. When the upper guardrail 2 is collided and generates lateral movement, the upper positioning portion 5 and the lower positioning portion 4 are in abutting cooperation to prevent the separation of the upper guardrail 2 and the lower guardrail 1, which can play an overall protection role. At the same time, the support leg 201 can also abut and limit the lower guardrail 1 at the opening 3 position to further restrict the collision and separation between the upper guardrail 2 and the lower guardrail 1 and maintain a stable separation effect.

[0030] The guardrail structure of the present invention can reduce the contact force transmitted by the upper guardrail 2 to the lower guardrail 1 in the vertical direction during normal use, so that the upper guardrail 2 and the lower guardrail 1 do not directly contact each other, thereby weakening the connection failure and instability caused by the relative vibration transmission between the upper guardrail 2 and the lower guardrail 1. Moreover, through the synergistic effect of the upper positioning portion 5, the lower positioning portion, and the support leg 201, the guardrail structure can maintain a relatively stable state when being collided and has a good separation effect.

[0031] Moreover, when the lower guardrail 1 is transformed, only the opening 3 needs to be provided in the lower guardrail 1 and the upper positioning portion 5 at the top of the lower guardrail 1 needs to be processed. Compared with the prior art method of drilling holes in the lower guardrail 1 and implanting steel bars for connection, the structure of the support leg 201 is more stable than the connection structure of implanting steel bars in the lower guardrail 1. Moreover, the setting density of the support leg 201 can be lower than the density of implanting steel bars, reducing the construction position and frequency of the lower guardrail 1, simplifying the process flow, and also reducing the damage to the integrity of the lower guardrail 1 caused by drilling and implanting steel bars in the lower guardrail 1.

[0032] As a preferred embodiment of the present invention, in the preferred embodiment, further specifically, the opening 3 penetrates one side of the lower guardrail 1, and the upper guardrail 2 includes at least two support legs. At least two of the support legs in the same upper guardrail 2 are respectively located on both sides of the lower guardrail 1. As shown in the figure, by penetrating the opening 3 through the side of the lower guardrail 1, the opening 3 can be directly constructed from the side of the lower guardrail 1 during construction, which is convenient for processing the opening 3 of the lower guardrail 1, and can also maintain the thickness and integrity of the remaining part of the lower guardrail 1 on one side of the opening 3 and maintain the strength of the remaining part of the lower guardrail 1 at the opening 3 position.

[0033] In an alternative embodiment, the opening 3 can also be provided in the middle part of the lower guardrail 1.

[0034] In the embodiments of the present invention, a further optimization lies in that the guardrail structure further includes a vibration isolation support portion 8 filled in the first vibration isolation gap 6. By providing the vibration isolation support portion 8, during normal use, the lower guardrail 1 can assist in supporting the upper guardrail 2, and the vibration isolation support portion 8 weakens the vibration transmission between the upper guardrail 2 and the lower guardrail 1. When the upper guardrail 2 is impacted, the vibration isolation support portion 8 can transmit the binding force between the upper positioning portion 5 and the lower positioning portion 4.

[0035] Regarding the setting of the vibration isolation support portion 8, in a preferred embodiment, more specifically, the vibration isolation support portion 8 is integrally cast and connected to the bottom of the upper guardrail 2. The vibration isolation support portion 8 includes a deformable vibration isolation layer 801 and a rigid layer 802 spaced apart on the top of the vibration isolation layer 801. The rigid layer 802 is integrally cast in the upper guardrail 2 through steel bars.

[0036] Specifically, the vibration isolation layer 801 can be selected from a rubber layer, a canvas layer, or a layered structure made of other deformable vibration isolation materials.

[0037] By providing the deformable vibration isolation layer 801 and the separate rigid layer 802, a better fitting effect can be achieved between the bottom of the lower guardrail 1 and the lower positioning surface portion, so as to ensure better cooperation between the upper positioning portion 5 and the lower positioning portion 4 when the upper guardrail 2 is cast and formed, especially in the working condition of post-processing the lower positioning surface portion, reducing the processing difficulty requirements for the lower positioning surface portion. When the lower positioning surface portion is in the form of post-cutting, the vibration isolation layer 801 can be used to maintain the fitting with the lower positioning surface. By providing the rigid layer 802, the rigid layer 802 is integrally cast and connected with the steel bars used in the casting of the upper guardrail 2, further improving the connection stability between the upper guardrail 2 and the vibration isolation support portion 8, preventing the upper guardrail 2 and the vibration isolation support portion 8 from being misaligned when vibrating, so as to maintain the structural stability of the upper guardrail 2. In Figure 4 In order to better display the structure, the left part of the upper guardrail is shown in the form of having a mold and a casting steel reinforcement cage before casting.

[0038] In a preferred embodiment, a further optimization of the present invention lies in that the lower guardrail 1 is provided with a connection hole 9 penetrating the lower guardrail 1 at the lower section of the opening 3; the guardrail structure further includes a lower connection part, and the lower connection part includes a connecting piece 10 passing through the connection hole 9. One end of the connecting piece 10 is connected to the support leg 201 corresponding to the position of the connection hole 9, and the other end passes through the connection hole 9 and is fixed to the other end of the lower guardrail 1; a second vibration isolation gap is provided between the connecting piece 10 and the lower guardrail 1. By providing the connecting piece 10, when the upper guardrail 2 is collided and the support leg 201 is broken, the upper guardrail 2 can be further restricted by the connecting piece 10 to prevent the upper guardrail 2 from separating from the lower guardrail 1 after coming off. Specifically, one end of the connecting piece 10 can be embedded in the support leg 201, and the other end passes through the connection hole 9 and is abutted and fixed to the lower guardrail 1 through structures such as nuts.

[0039] A further optimization of the present invention lies in that the guardrail structure further includes a strengthening cable 11. The upper end of the strengthening cable 11 is integrally cast in the guardrail, and the lower end is connected to the lower guardrail 1. As shown in the figure, by providing the strengthening cable 11, after the upper guardrail 2 is collided and separated from the lower guardrail 1, the strengthening cable 11 can restrain the separated upper guardrail 2 at the lower guardrail 1. The strengthening cable 11 can delay the separation between the upper guardrail 2 and the lower guardrail 1 and reduce the probability of secondary injury caused by the upper guardrail 2 flying out.

[0040] As shown in the figure, specifically, the lower end of the strengthening cable 11 can be connected to the lower guardrail 1 by means of expansion bolts or bonding.

[0041] In a preferred embodiment of the present invention, for the setting method of the upper positioning part 5 and the lower positioning part 4, preferably, the lower positioning part 4 is a lower positioning surface provided at the top of the lower guardrail 1. The lower positioning surface is set to be inclined, and the lower guardrail 1 is provided with a plurality of the lower positioning surfaces, and at least two of the lower positioning surfaces have opposite inclination directions.

[0042] In a preferred embodiment of the present invention, a further optimization lies in that the support leg 201 is anchored to the ground layer by an anchor 7. As shown in the figure, by providing the anchor 7, the anti-collision strength of the upper guardrail 2 can be further improved, and the stability of the entire guardrail can be improved. For the setting of the anchor 7, preferably, as shown in the figure, more specifically, the anchor 7 includes a bolt or cable anchored to the ground layer, and the upper end of the anchor is integrally cast in the support leg 201.

[0043] The present invention also provides a construction method for increasing the height of a guardrail structure, which can construct the above guardrail structure, including:

[0044] S1. Open an opening 3 in the lower guardrail 1 that extends to the ground layer;

[0045] Specifically, as shown in the figure, openings 3 that are open on the sides are provided on both sides of the guardrail.

[0046] S2. Process a lower positioning portion 4 at the top of the lower guardrail 1;

[0047] The lower positioning portion 4 can be set as a positioning inclined surface at the top of the lower guardrail 1, and the positioning inclined surfaces are distributed on both sides of the top of the lower guardrail 1.

[0048] S3. Fabricate a mold for the upper guardrail 2 at the upper side of the lower guardrail 1 and at the position of the opening 3;

[0049] As shown in the figure, the mold for the upper guardrail 2 includes a deformable vibration isolation layer 801 and side templates. The vibration isolation layer 801 is arranged at the top of the lower guardrail 1 and inside the opening 3, and the side templates are arranged on the side of the upper guardrail 2 and on the outer side of the support leg 201.

[0050] S4. Pour to form the upper guardrail 2 and remove at least the side part of the mold for the upper guardrail 2. After the pouring is completed, remove the side templates of the mold for the upper guardrail 2 to obtain the upper guardrail 2.

[0051] Among them, by arranging a vibration isolation support portion between the mold for the upper guardrail and the lower guardrail, the vibration isolation support portion can be placed on the top of the lower guardrail before pouring the upper guardrail, which is convenient for the cooperation between the vibration isolation support portion and the lower positioning surface. At the same time, directly pouring the upper guardrail on the vibration isolation support portion enables the bottom of the upper guardrail to automatically form an upper positioning surface with good fit with the lower positioning surface, and further makes it easier for the upper guardrail and the lower guardrail to be stably connected. After the pouring and forming, remove the side templates of the mold for the upper guardrail.

[0052] Preferably, before S3, an anchor 7 anchored to the ground layer is installed at the position of the opening 3, and the anchor 7 is integrally poured into the support leg 201.

[0053] The above specific implementation manners cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manners of the present invention falls within the protection scope of the present invention.

[0054] Those parts not detailed in the present invention are all well-known technologies to those skilled in the art of this technology.

Claims

1. A secondary-reformed concrete guardrail structure, characterized in that, it includes a lower guardrail and an upper guardrail arranged on the upper side of the lower guardrail. The lower guardrail is provided with an opening extending to the ground layer. The upper guardrail includes support legs inserted into the opening and a guardrail part integrally arranged at the top of the support legs. The support legs are integrally supported on the ground layer. The guardrail part is located on the upper side of the lower guardrail, and there is a gap between the support legs and the lower guardrail; a lower positioning part is provided at the top of the lower guardrail, an upper positioning part is provided at the bottom of the guardrail part, and a first vibration isolation gap is provided between the upper positioning part and the lower positioning part. And when the upper positioning part moves laterally relative to the lower positioning part, it can cooperate with the lower positioning part to stop the lateral movement of the guardrail part relative to the lower guardrail; the opening penetrates one side of the lower guardrail, and the upper guardrail includes at least two support legs. At least two of the support legs in the same upper guardrail are respectively located on both sides of the lower guardrail; the lower guardrail is provided with a connection hole penetrating the lower guardrail at the lower section of the opening; the guardrail structure further includes a lower connection part. The lower connection part includes a connecting piece passing through the connection hole. One end of the connecting piece is connected to the support leg corresponding to the position of the connection hole, and the other end passes through the connection hole and is fixed to the other end of the lower guardrail; a second vibration isolation gap is provided between the connecting piece and the lower guardrail.

2. A secondary-reformed concrete guardrail structure according to claim 1, characterized in that: the guardrail structure further includes a vibration isolation support part filled in the first vibration isolation gap.

3. A secondary-reformed concrete guardrail structure according to claim 2, characterized in that: the vibration isolation support part is integrally cast and connected to the bottom of the upper guardrail. The vibration isolation support part includes a deformable vibration isolation layer and a rigid layer arranged at intervals on the top of the vibration isolation layer. The rigid layer is integrally cast in the upper guardrail through steel bars.

4. A secondary-reformed concrete guardrail structure according to claim 1, characterized in that: the guardrail structure further includes a strengthening cable. The upper end of the strengthening cable is integrally cast in the guardrail, and the lower end is connected to the lower guardrail.

5. A secondary-reformed concrete guardrail structure according to claim 1, characterized in that: the lower positioning part is a lower positioning surface arranged on the top of the lower guardrail. The lower positioning surface is arranged to be inclined, and the lower guardrail is provided with a plurality of the lower positioning surfaces, and the inclination directions of at least two of the lower positioning surfaces are opposite.

6. A secondary-reformed concrete guardrail structure according to claim 1, characterized in that: the support legs are anchored to the ground layer through anchor bolts.

7. A construction method for increasing the height of a guardrail structure, based on the secondary-reformed concrete guardrail structure according to any one of claims 1 to 6, characterized in that: it includes: S1. Open an opening in the lower guardrail extending to the ground layer; S2. Process a lower positioning part on the top of the lower guardrail; S3. Make an upper guardrail mold on the upper side of the lower guardrail and at the opening position; S4. Pour and form the upper guardrail, and remove at least the side parts of the upper guardrail mold.

8. A construction method for increasing the height of a guardrail structure according to claim 7, It is characterized in that: Before S3, it includes Installing an anchor fixed to the formation at the opening position and integrally casting the anchor in the support leg.

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