Construction device and construction method of bridge anti-collision guardrail

Abstract

The present invention relates to a construction device and a construction method for a bridge anti-collision guardrail, which belongs to bridge construction technology. The device comprises a chassis, which is arranged across the center dividing strip between two bridge decks. A crane is provided at the bottom of the chassis, and the crane is used to lift materials. The bottom of the chassis comprises two groups of supporting legs, which are respectively arranged on both sides of the chassis, and each of the two groups of supporting legs comprises two supporting legs. The four supporting legs are connected to the chassis via universal joints, and universal wheels are provided at one end of the four supporting legs away from the chassis. The two groups of supporting legs are respectively in contact with the two bridge decks.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge construction, and in particular relates to a construction device and a construction method of a bridge anti-collision guardrail. Background Art

[0002] A bridge is a suspended road structure above the terrain. In order to prevent objects on the bridge from falling off the bridge, general bridges are equipped with guardrails. Guardrails are usually made of reinforced concrete and are an important component of the bridge.

[0003] For the construction of bridge anti-collision guardrails, generally a method of using hanging plates, hanging cages or scaffolding tubes and fasteners as a suspended bracket is adopted, or a trolley is adopted. The suspended bracket scheme has a great impact on the vehicles passing below when welding sparks fly, debris falls when the template is installed and disassembled, and cement slurry falls when pouring the guardrail, and the safety is low. The trolley scheme is inconvenient to operate when the work area needs to be transferred. For this reason, Chinese patent CN114319128A discloses a mobile trolley for bridge anti-collision guardrails, including: a traveling vehicle, a telescopic device, a lifting guide rail device and a hanging basket; the traveling vehicle is used to move to the bridge road surface area corresponding to the bridge anti-collision guardrail when in use; the telescopic device includes a telescopic arm, which is mounted on the top of the traveling vehicle and is connected to the traveling vehicle The carriage is set up for sliding; the lifting guide rail device includes a lifting guide rail, which is located at the end of the telescopic arm and is vertically lifted and set on the outside of the bridge anti-collision guardrail; the hanging basket is set at the end of the lifting guide rail; it helps to shorten the construction time and reduce the safety risk of construction; however, the above structure is used for two-way roads, each of which is set on an independent bridge deck, that is, when there is a gap between the bridge decks where the two-way lanes are located, it can only independently construct a total of four groups of guardrails for two independent lanes. When the construction of a group of guardrails on a certain bridge deck close to another bridge deck is completed, the whole structure needs to be moved to the edge of the other bridge deck to continue the construction of the next group of guardrails. The construction efficiency is low. For this reason, a construction device and a construction method of a bridge anti-collision guardrail with high construction efficiency are needed. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a construction device and a construction method for a bridge anti-collision guardrail, which has the characteristics of high construction efficiency.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A construction device for a bridge anti-collision guardrail includes a chassis, the chassis being arranged above a median strip between two bridge decks, a crane being arranged at the bottom of the chassis, and the crane being used to lift materials;

[0007] The bottom of the chassis includes two groups of supporting feet, which are respectively arranged on both sides of the chassis. The two groups of supporting feet each include two supporting feet. The four supporting feet are connected to the chassis through universal joints. Universal wheels are provided at one end of the four supporting feet away from the chassis. The two groups of supporting feet are respectively in contact with two bridge decks.

[0008] As a preferred technical solution of the present invention, it also includes a control module, which is electrically connected to a weight sensor. The weight sensor is used to detect the weight borne by the chassis and upload it to the control module. The control module is used to instruct the support legs to adjust the angle with the ground. The control module reduces the angle between the support legs and the bottom surface when the weight exceeds a threshold.

[0009] As a preferred technical solution of the present invention, the weight sensor is used to detect the weight m borne by the chassis and upload it to the control module. The control module is pre-input with the standard weight m0 and the standard angle a0. The control module instructs the support legs to adjust to the angle a.

[0010] Where a=m0 / m×a0.

[0011] As an optimal technical solution of the present invention, a shear force detector is provided on the support leg, and the shear force detector is used to detect the shear force of the support leg. The control module increases the angle when the shear force exceeds a threshold, and reduces the angle when the shear force exceeds a threshold.

[0012] As a preferred technical solution of the present invention, the control module is pre-input with a shear force threshold J0, and the shear force detector is used to detect the shear force J of the support leg and instruct the support leg to adjust to an angle a×A1;

[0013] Among them, A1=J / J0×c.

[0014] As a preferred technical solution of the present invention, a control panel is also included, and the control panel is used to input the values ​​of J0, m0 and a0

[0015] As a preferred technical solution of the present invention, a hanging basket is suspended below the crane.

[0016] A method for constructing a bridge anti-collision guardrail, applicable to the above-mentioned bridge anti-collision guardrail construction device, comprises the following steps:

[0017] Step 1: Place the chassis between the two bridge decks at the starting end of the bridge, so that the two sets of legs on both sides of the chassis abut against the two bridge decks respectively, so that the chassis spans between the two bridge decks;

[0018] Step 2: Drive the chassis to the position where the anti-collision guardrail needs to be set;

[0019] Step 3: Use the crane at the bottom of the chassis to construct the anti-collision guardrail on the side of one bridge deck close to the other bridge deck:

[0020] Step 4: Use the crane at the bottom of the chassis to construct the anti-collision guardrail on the other bridge deck's side:

[0021] Step 5: Drive the chassis to the next location where a crash barrier needs to be installed;

[0022] Step 6: Repeat steps 3 to 5 until the construction of two sets of anti-collision guardrails on the opposite side of the two bridge decks is completed.

[0023] The beneficial effects of the present invention are:

[0024] (1) By setting up a chassis with two sets of legs, the chassis is placed above the median strip between the two bridge decks, and a crane is placed at the bottom of the chassis, so that no matter which bridge deck the crane is on, the crane can get support from both bridge decks. The two sets of anti-collision guardrails on two independent bridge decks near the edge of the other bridge deck can be constructed at the same time, without having to transfer the crane from one bridge deck to the other to obtain stable support, thereby improving construction efficiency;

[0025] (2) By setting up a control module and a weight sensor, when the lifting weight is large and the chassis height needs to be lowered, the chassis height is lowered to ensure construction safety. When the lifting weight is small, the chassis can be raised to improve construction efficiency, and the chassis height is raised to ensure construction efficiency.

[0026] (3) By setting up a shear force detector, when the shear force is large and the risk of the support leg breaking and deforming is high, the support leg is subjected to a smaller shear force, sacrificing the overall center of gravity stability and improving construction efficiency. When the shear force is low and the risk of the support leg breaking and deforming is low, construction safety is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of another direction of the present invention;

[0030] Figure 3 This is a block diagram of the control module of the present invention.

[0031] Description of main component symbols:

[0032] In the figure: 1. Chassis; 11. Support leg; 12. Universal joint; 2. Crane; 3. Bridge deck; 4. Control module. DETAILED DESCRIPTION

[0033] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0034] See also Figure 1-3 A construction device for a bridge anti-collision guardrail includes a chassis 1, which is arranged above the dividing strip between two bridge decks 3. A crane 2 is provided at the bottom of the chassis 1, and the crane 2 is used to lift materials.

[0035] The bottom of the chassis 1 includes two sets of supporting legs 11, which are respectively arranged on both sides of the chassis 1. The two sets of supporting legs 11 each include two supporting legs 11. The four supporting legs 11 are connected to the chassis 1 through a universal joint 12. The four supporting legs 11 are provided with a universal wheel at one end away from the chassis 1. The two sets of supporting legs 11 are respectively in contact with the two bridge decks 3.

[0036] Specifically, the chassis 1 is a rectangular plate-shaped structure. In the initial state, the chassis 1 is arranged parallel to the ground. At this time, the bottom surface of the chassis 1 is rectangular. Each support leg 11 includes a universal joint 12. Four universal joints 12 are respectively arranged at the four corners of the rectangular bottom surface. The four support legs 11 are arranged on the corresponding universal joints 12. Each universal joint 12 is composed of a turntable arranged parallel to the chassis 1 and a bearing arranged below the turntable. The bearing is parallel to the bottom plate. The turntable can rotate around a rotation axis perpendicular to the chassis 1, and the bearing can rotate around a rotation axis parallel to the chassis 1. At this time, each universal joint 12 can drive the support leg 11 connected thereto to rotate around a rotation axis perpendicular to the bottom surface and around a rotation axis parallel to the bottom surface, thereby realizing the function of the universal joint 12;

[0037] At the same time, a bearing parallel to the chassis 1 is provided at one end of each support leg 11 away from the universal joint 12, and the end of the support leg 11 away from the universal joint 12 is hinged to the universal wheel through the bearing;

[0038] At this time, the four legs 11 hold up the chassis 1. When used for a bridge with separate lanes in two directions, for example, three forward lanes occupy one independent bridge deck 3, and three reverse lanes occupy another independent bridge deck 3, and a center divider is formed between the two independent bridge decks 3, two of the four legs 11 are in contact with one of the independent bridge decks 3, and the other two are in contact with the other independent bridge deck 3. At this time, the chassis 1 is arranged across the center divider between the two independent bridge decks 3. At this time, one bridge deck is defined as the first bridge deck 3, and the other bridge deck is defined as the second bridge deck 3.

[0039] At the same time, since a crane 2 is provided at the bottom of the chassis 1, the crane 2 is also suspended above the median strip of the two independent bridge decks 3. When the crane 2 is located at the edge of the first bridge deck 3 close to the second bridge deck 3 of the two independent bridge decks 3, that is, the construction position of the anti-collision guardrail, the crane 2 can obtain support from the two bridge decks 3. Compared with the general structure in which the entire mobile structure is provided on one of the bridge decks 3, which can only obtain support from one bridge deck 3, in this solution, no matter which bridge deck 3 the crane 2 is located above the side close to the other bridge deck 3, the crane 2 can obtain support from the two bridge decks 3. Therefore, at this time, two sets of anti-collision guardrails of the two independent bridge decks 3 close to the edge of the other bridge deck 3 can be constructed at the same time, and there is no need to transfer the crane 2 from one bridge deck 3 to the other bridge deck 3 to obtain stable support.

[0040] By setting up a chassis 1 including two sets of support legs 11, the chassis 1 is arranged across the dividing strip between the two bridge decks 3, and a crane 2 is arranged at the bottom of the chassis 1, so that no matter which bridge deck 3 the crane 2 is located above the side close to the other bridge deck 3, the crane 2 can obtain support from the two bridge decks 3, and two sets of anti-collision guardrails on two independent bridge decks 3 close to the edge of the other bridge deck 3 can be constructed at the same time. There is no need to transfer the crane 2 from one bridge deck 3 to another bridge deck 3 to obtain stable support, which improves construction efficiency.

[0041] In the above process, different bridges require different sizes of anti-collision guardrails. For example, when the operator calculates that a certain bridge has a large traffic volume and a large average vehicle weight, that is, the collision intensity between the vehicle and the anti-collision guardrail is large, the anti-collision guardrail size required at this time is large. During construction, the anti-collision guardrail prefabricated components lifted by crane 2 are large in size, or the mold used for casting the anti-collision guardrail is large in size, and the weight lifted by crane 2 is large in this case;

[0042] When the angle between the four legs 11 and the ground is large, close to 90 degrees, the overall height of the chassis 1 from the bridge deck 3 is relatively high. At this time, when lifting heavier objects, the overall center will be too high, the overall stability will be reduced, and the operation safety will be low. Therefore, when lifting heavier objects, it is necessary to rotate the legs 11 around the universal joints 12 to reduce the angle between the legs 11 and the ground, so that the span of the structure formed by the chassis 1 and the legs 11 is larger, the height of the chassis 1 is reduced, and the overall center of gravity is lowered. When lifting lighter objects, the overall center of gravity changes less, and when the height of the chassis 1 is high, the relative height of the crane 2 from the bridge deck 3 is high. At this time, more objects of larger sizes can be easily lifted, improving operation efficiency. In order to take into account both operation safety and operation efficiency, a control module 4 is also included. The control module 4 is electrically connected to a weight sensor. The weight sensor is used to detect the weight borne by the chassis 1 and upload it to the control module 4. The control module 4 is used to instruct the legs 11 to adjust the angle with the ground. When the weight exceeds a threshold, the control module 4 reduces the angle between the legs 11 and the ground.

[0043] Specifically, the weight sensor is used to detect the weight m borne by the chassis 1 and upload it to the control module 4. The control module 4 is pre-input with the standard weight m0 and the standard angle a0. The control module 4 instructs the support leg 11 to adjust to the angle a; where a = m0 / m×a0;

[0044] Specifically, the control module 4 is also used to control the lifting of the crane 2. Whenever the control module 4 is instructed to perform a lifting operation, the weight sensor is used to detect the weight of the object being lifted by the crane 2. The weight sensor detects the weight of the object and uploads it to the control module 4 in real time. The control module 4 determines whether the weight m exceeds the threshold and calculates the value of a=m0 / m×a0. It then adjusts the angle between the support leg 11 and the ground to a by driving the universal joint 12. When the next lifting operation is performed, the control module 4 recalculates the weight data and adjusts the angle between the support leg 11 and the ground.

[0045] When the value of m is large, it means that the lifting weight is large and the height of the chassis 1 needs to be lowered. At this time, the value of a=m0 / m×a0 is low. The control module 4 drives the universal joint 12 to adjust the angle between the support leg 11 and the ground to a. When the lifting weight is large and the height of the chassis 1 needs to be lowered, the height of the chassis 1 is lowered to ensure construction safety.

[0046] Similarly, when the value of m is small, it means that the lifting weight is small, and there is no need to lower the height of the chassis 1. On the premise of not affecting construction safety, the chassis 1 needs to be raised to ensure work efficiency. At this time, the value of a=m0 / m×a0 is low. When the control module 4 drives the universal joint 12 to adjust the angle between the support leg 11 and the ground to a, the lifting weight is small, the chassis 1 can be raised to improve construction efficiency, and the height of the chassis 1 is increased to ensure construction efficiency.

[0047] By setting up the control module 4 and the weight sensor, when the lifting weight is large and the height of the chassis 1 needs to be lowered, the height of the chassis 1 is lowered to ensure construction safety. When the lifting weight is small, the chassis 1 can be raised to improve construction efficiency, and the height of the chassis 1 is raised to ensure construction efficiency.

[0048] When the angle between the support leg 11 and the ground is small, when the support leg 11 supports the chassis 1, the angle between the force exerted by the chassis 1 on the support leg 11 and the support leg 11 is large, forming a large shear force. When the shear force is too large, it is easy to reduce the service life of the support leg 11 or even cause it to break. Therefore, when the shear force is large, it is necessary to correct the angle between the support leg 11 and the ground upward so that the force of the support leg 11 and the chassis 1 overlap to a greater extent. To this end, a shear force detector is provided on the support leg 11. The shear force detector is used to detect the shear force of the support leg 11. The control module 4 increases the angle when the shear force exceeds a threshold.

[0049] Specifically, the control module 4 is pre-input with a shear force threshold J0, and four shear force detectors are provided on the four legs 11. The four shear force detectors are respectively used to detect the shear force J of the legs 11 and upload the shear force data to the control module 4 at a frequency of once per second. Each time the control module 4 receives the four shear force data, it calculates the average value to obtain the shear force J and instructs the legs 11 to adjust to an angle a×A1, wherein A1=J / J0×c, a×A1≤90°, and A1≥1. When the calculation result of the control module 4 shows that a×A1>90°, the control module 4 makes a×A1=90°. At the same time, when the calculation result shows that A1<1, the control module 4 takes A1=1.

[0050] When the shear force J is large, it means that the angle between the support leg 11 and the ground needs to be corrected upward so that the forces of the support leg 11 and the chassis 1 overlap to a greater extent. At this time, the value of A1=J / J0×c is large. When the control module 4 instructs the support leg 11 to adjust to the angle a×A1, the angle between the support leg 11 and the ground is corrected upward when the shear force is large.

[0051] When the shear force is small, it means that there is no need to adjust the angle between the support leg 11 and the ground upward. At this time, the value of A1=J / J0×c is small, close to or equal to 1. When the control module 4 instructs the support leg 11 to adjust to the angle a×A1, the angle between the support leg 11 and the ground is maintained when the shear force is small, without increasing the center of gravity height, ensuring construction safety;

[0052] In order to facilitate the input of values ​​such as J0, m0 and a0, a control panel is also included. The control panel is electrically connected to the control module 4 and is used to input the values ​​of J0, m0 and a0.

[0053] To facilitate the construction of anti-collision guardrails, a hanging basket is hung under the crane 2. Specifically, the hanging basket and the hook are detachably connected. When the operator needs to stand in the air, the hanging basket is connected to the hook, and then the crane 2 drives the hook to hang the hanging basket at the construction site.

[0054] The present invention also provides a method for constructing a bridge anti-collision guardrail, which is applicable to the construction device of the above-mentioned bridge anti-collision guardrail, and comprises the following steps:

[0055] Step 1: Place the chassis 1 between the two bridge decks 3 at the starting end of the bridge, so that the two sets of legs 11 on both sides of the chassis 1 abut against the two bridge decks 3 respectively, so that the chassis 1 spans between the two bridge decks 3;

[0056] Step 2: driving the chassis 1 to move to the position where the anti-collision guardrail needs to be set;

[0057] Step 3: Use the crane 2 at the bottom of the chassis 1 to construct the anti-collision guardrail on the side of the first bridge deck 3 close to the second surface 3:

[0058] Step 4: Use the crane 2 at the bottom of the chassis 1 to construct the anti-collision guardrail on the side of the second bridge deck 3 close to the first bridge deck 3:

[0059] Step 5: driving the chassis 1 to move to the next location where a crash barrier needs to be installed;

[0060] Step 6: Repeat steps 3 to 5 until the construction of two sets of anti-collision guardrails on the opposite side of the two bridge decks 3 is completed.

[0061] The working principle and use process of the present invention:

[0062] When in use, the four supporting legs 11 support the chassis 1. When used for a bridge with separate lanes in two directions, for example, three forward lanes occupy one independent bridge deck 3, and three reverse lanes occupy another independent bridge deck 3, and a center dividing strip is formed between the two independent bridge decks 3, two of the four supporting legs 11 are in contact with one of the independent bridge decks 3, and the other two are in contact with the other independent bridge deck 3. At this time, the chassis 1 spans above the center dividing strip between the two independent bridge decks 3.

[0063] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A construction device for a bridge anti-collision guardrail, characterized by: It includes a chassis, the chassis is arranged above the center dividing strip between the two bridge decks, and a crane is provided at the bottom of the chassis, and the crane is used to lift materials; The bottom of the chassis includes two groups of supporting feet, which are respectively arranged on both sides of the chassis. Each of the two groups of supporting feet includes two supporting feet. The four supporting feet are connected to the chassis through universal joints. Universal wheels are provided at one end of the four supporting feet away from the chassis. The two groups of supporting feet are respectively in contact with the two bridge decks. The chassis further includes a control module electrically connected to a weight sensor for detecting the weight borne by the chassis and transmitting the weight to the control module. The control module is configured to instruct the support legs to adjust their angles with the ground. The control module reduces the angles between the support legs and the ground when the weight exceeds a threshold. The weight sensor is used to detect the weight m borne by the chassis and upload it to the control module. The control module is pre-input with the standard weight m0 and the standard angle a0. The control module instructs the support legs to adjust to the angle a. Where a=m0 / m×a0.

2. The construction device for a bridge anti-collision guardrail according to claim 1, characterized in that: The support leg is provided with a shear force detector for detecting the shear force of the support leg. The control module increases the angle between the support leg and the ground when the shear force exceeds a threshold.

3. The construction device for a bridge anti-collision guardrail according to claim 2, characterized in that: A control panel is also included for inputting values ​​of m0 and a0.

4. The construction device for a bridge anti-collision guardrail according to claim 1, characterized in that: A hanging basket is suspended below the crane.

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