Ecc-architectural solid waste flexible combination pier protection device and method

Abstract

The application discloses an ECC-building solid waste flexible combination bridge pier protection device and method, and the device comprises a plurality of ECC protection hanging plates; two adjacent ECC protection hanging plates are detachably connected; and a flexible fiber waste particle filling layer is arranged in the ECC protection hanging plate. The method comprises the following steps: step one, preparing the ECC protection hanging plate; step two, bonding a fiber cloth bag on the inner wall of the ECC protection hanging plate, and sealing the bottom of the fiber cloth bag; step three, filling the flexible fiber waste particle filling layer into the fiber cloth bag; step four, cleaning the surface of the bridge pier, and closely attaching a plurality of ECC protection hanging plates to the outer wall of the bridge pier; and step five, assembling and fixing the plurality of ECC protection hanging plates through a connecting assembly. The application utilizes the material properties of high ductility of the ECC and the energy absorption characteristics of the brittle failure of the flexible fiber bulk particles, absorbs the impact energy, reduces the impact force, can simultaneously protect the safety of the bridge pier and the vehicle, and has high durability, is green and environment-friendly, and utilizes the waste.

Description

Technical Field

[0001] This invention relates to the field of bridge pier impact protection technology, and in particular to an ECC-construction solid waste flexible composite bridge pier protection device and method. Background Technology

[0002] In recent years, with the continuous improvement of people's living standards, the number of cars has also been increasing. To alleviate traffic pressure and provide convenient travel, the construction of highway bridges has entered a stage of rapid development. Consequently, traffic accidents involving cars colliding with bridge piers have been increasing. Collisions between vehicles and bridges not only cause damage to public property but also pose a great threat to the lives of people inside the vehicles.

[0003] Currently, there are two main types of bridge pier anti-collision devices: one is the traditional rigid protective device, which has high rigidity but poor buffering capacity. Although it improves the safety of the bridge pier, it is extremely easy to pose a serious threat to life to vehicles and occupants in a collision; the other is the sandwich flexible protective device, which can protect the bridge pier while reducing vehicle damage and protecting the safety of the occupants, and has gradually replaced the rigid protective device. However, most sandwich flexible protective devices use metal as the external frame structure, resulting in poor durability and high construction and long-term maintenance costs.

[0004] To address this, a flexible composite bridge pier protection device and method based on ECC (Electronic Controlled Concrete) and construction solid waste is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an ECC-construction solid waste flexible composite bridge pier protection device and method, which aims to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides an ECC-construction solid waste flexible combined bridge pier protection device, including a plurality of ECC protective hanging plates, wherein the plurality of ECC protective hanging plates are enclosed to form an annular cavity, and the annular cavity is used to wrap the bridge pier.

[0007] The two adjacent ECC protective panels are detachably connected by a connecting assembly, and the inner wall of the ECC protective panel is in contact with the outer wall of the pier.

[0008] The ECC protective panel is filled with a flexible fiber waste particle filling layer.

[0009] According to the present invention, an ECC-construction solid waste flexible composite bridge pier protection device is provided, wherein the connecting assembly includes two connecting plates and several bolts. The two connecting plates are respectively disposed on the inner walls of two adjacent ECC protective hanging plates. The several bolts penetrate the inner walls of the two adjacent ECC protective hanging plates and are threadedly connected to the two connecting plates.

[0010] According to the present invention, an ECC-construction solid waste flexible composite bridge pier protection device is provided, wherein a plurality of first threaded holes are provided on the connecting plate, and a second threaded hole corresponding to the first threaded hole is provided on the side wall of the ECC protection hanging plate, and both the first threaded hole and the second threaded hole are threadedly connected to the bolt.

[0011] According to the present invention, a flexible composite bridge pier protection device for ECC-construction solid waste is provided, wherein the ECC protection panel has two ECC ribs integrally formed inside.

[0012] According to the present invention, an ECC-construction solid waste flexible composite bridge pier protection device is provided, wherein the flexible fiber waste particle filling layer includes a fiber bag and flexible fiber granules filled in the fiber bag;

[0013] The fiber bag is fixedly installed on the inner wall of the ECC protective hanging plate.

[0014] According to the present invention, an ECC-construction solid waste flexible composite bridge pier protection device is provided, wherein the flexible fiber granules include ceramsite, recycled concrete aggregate, and recycled brick slag particles; the content of the ceramsite is not less than 40%; and the particle size of the recycled brick slag particles is 0.2mm to 8mm.

[0015] This invention also provides an ECC-construction solid waste flexible composite bridge pier protection method, comprising the following steps:

[0016] Step 1: Prepare ECC protective panels;

[0017] Step 2: Attach the fiber cloth bag to the inner wall of the ECC protective panel and seal the bottom of the fiber cloth bag;

[0018] Step 3: Fill the fiber bag with flexible fiber granules and seal the top of the fiber bag;

[0019] Step 4: Clean the surface of the bridge pier and attach several ECC protective panels tightly to the outer wall of the bridge pier;

[0020] Step 5: Assemble and fix several ECC protective mounting plates using the connecting components.

[0021] According to the present invention, a flexible composite bridge pier protection method using ECC-construction solid waste is provided, wherein step one specifically includes:

[0022] Add the raw materials and water to the mixer and stir; then add the silicone defoamer, early-strength polycarboxylate superplasticizer and water to the mixer and stir.

[0023] Add steel fibers to the mixer, then add water and mix.

[0024] Pour into the mold and vibrate;

[0025] Curing and hardening to shape.

[0026] According to the present invention, a flexible composite bridge pier protection method using ECC-construction solid waste is provided, wherein the raw materials include cement, coarse aggregate, fine aggregate, quartz sand, silica fume, fly ash, polyvinyl alcohol fiber, and epoxy resin.

[0027] According to the present invention, in step four of the method for protecting bridge piers using ECC-construction solid waste flexible composite materials, the surface of the bridge pier is cleaned within a height range of 1.0m to 1.5m from the ground.

[0028] The present invention discloses the following technical effects:

[0029] This invention uses several ECC protective panels that are close to the outer wall of the bridge pier, preventing the pier from directly contacting the air. The protective panels and the flexible fiber waste particle filling layer inside them protect the pier, enhancing its durability and providing long-term protection. Simultaneously, the protective device can protect against vehicles that collide with the pier at an angle. Under such impact, the device deforms, effectively reducing the impact force and achieving effective protection.

[0030] This invention utilizes the high ductility of ECC materials and the energy absorption characteristics of flexible fiber granules during brittle fracture to absorb impact energy and reduce impact force, thus simultaneously protecting the safety of bridge piers and vehicles. The ECC protective panel possesses excellent strength, high and low temperature performance, waterproofing, strong self-healing ability, and the ability to control crack width, improving the durability of bridge piers in changing environments and reducing the cost of long-term maintenance of protective devices. The flexible fiber waste particle filling layer of this invention enables the reuse of construction waste, making it more environmentally friendly and cost-effective. The flexible fiber waste particle filling layer has stable performance, a long lifespan, and a shelf life essentially the same as the main building's lifespan, providing long-term protection for bridge piers and enhancing their durability.

[0031] In this invention, the ECC protective plate is detachably connected via a connecting component, allowing for partial replacement of damaged ECC protective plates after an impact, thus improving the material utilization rate and post-impact repairability of the anti-collision device. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the ECC-Construction Solid Waste Flexible Composite Pier Protection Device of the present invention;

[0034] Figure 2 This is a schematic diagram of the filling layer in this invention;

[0035] Figure 3 This is a schematic diagram of the ECC protective mounting plate in this invention;

[0036] The components include: 1. ECC protective panel; 2. Flexible fiber waste particle filling layer; 3. Connecting plate; 4. Bolt; 5. Bridge pier. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Reference Figure 1-3 This invention provides an ECC-construction solid waste flexible composite bridge pier protection device, comprising several ECC protective panels 1, which together form an annular cavity for wrapping the bridge pier 5. In this embodiment, there are four ECC protective panels 1. The thickness of the frontal impact surface of the ECC protective panel 1 is greater than the thickness of the back impact surface and the thickness of the ECC ribs. The two sides of the frontal impact surface turn inward at corners, and the corner surface, the inclined surface, and the ECC ribs form two triangular prisms with right-angled triangles at their bases, which are not filled inside. The middle of the frontal impact surface is concave inward, and the concave shape is trapezoidal, filled with a flexible fiber waste particle filling layer 2. When the impact load is applied to the frontal impact surface of the ECC protective panel 1, the frontal impact surface bends and deforms, gradually squeezing the flexible fiber waste particle filling layer 2 and causing the ECC ribs to bend and deform, thereby significantly prolonging the impact time, reducing the impact force, reducing damage to the bridge pier and the vehicle, and significantly improving the safety of the occupants.

[0040] The two adjacent ECC protective panels 1 are detachably connected by a connecting component. The inner wall of the ECC protective panel 1 is in contact with the outer wall of the pier 5. The bending stiffness and toughness can be changed by adjusting the thickness, shape and fiber content of the ECC protective panel 1. The particle density of the flexible fiber waste particle filling layer 2 can be adjusted to adapt to different application scenarios and different levels of impact force, which has good flexibility and adjustability.

[0041] The ECC protective panel 1 is equipped with a flexible fiber waste particle filling layer 2; both the ECC protective panel 1 and the flexible fiber waste particle filling layer 2 are prefabricated in the factory and transported to the site for assembly; this achieves industrialized manufacturing, facilitates transportation and construction, and speeds up the construction process.

[0042] This configuration, with several ECC protective panels close to the outer wall of the pier, avoids direct contact between the pier and the air. The ECC protective panels and the flexible fiber waste particle filling layer 2 filled within the ECC protective panels 1 provide protection for the pier 5, enhancing its durability and providing long-term protection. At the same time, the protective device can protect against vehicles that collide with the pier at an angle. Under an angled impact, the protective device deforms, effectively regulating the load transferred to the pier 5, absorbing a large amount of impact energy, effectively reducing the impact force, and achieving effective protection.

[0043] The ECC protective panel 1 of the present invention has good strength, high and low temperature performance, waterproofness, strong self-healing ability and crack width control, which improves the durability of the bridge pier 5 in changing environments and reduces the cost of long-term maintenance of protective devices. The flexible fiber waste particle filling layer 2 of the present invention can realize the reuse of construction waste, which is more green and environmentally friendly and has low construction cost. The flexible fiber waste particle filling layer 2 has stable performance, long service life, and a shelf life that is basically the same as the service life of the main building, which has the ability to protect the bridge pier 5 for a long time and enhances the durability of the bridge pier 5.

[0044] In this invention, the ECC protective plate 1 is detachably connected by a connecting component, allowing for partial replacement of the damaged ECC protective plate 1 after an impact, thus improving the material utilization rate and post-impact repairability of the anti-collision device.

[0045] Further optimization of the design involves an inner groove on the end face of the ECC protective plate 1 furthest from the pier 5. The depth of the groove is one-third the thickness of the ECC protective plate 1, and the groove is an isosceles trapezoid. The function of the groove is to ensure that the frontal surface of the ECC protective plate 1 has sufficient deformation margin under large deformation during a collision, maintaining structural integrity. The thickness of the frontal surface of the ECC protective plate 1 is 1.5 times that of the back impact surface and the ECC rib. The frontal surface of the ECC protective plate 1 undergoes significant bending and tensile deformation upon impact. The back impact surface is flush with the outer side of the pier 5 and does not undergo bending deformation. Furthermore, since the length of the ECC rib is much shorter than the length of the frontal surface, to ensure coordinated deformation during frontal surface deformation, the thickness of the ECC rib is two-thirds the thickness of the frontal surface of the ECC protective plate 1, the same as the back impact surface thickness. This ensures that the ECC rib can undergo bending deformation and reduces the stiffness at the connection point, thereby improving the safety of vehicles and personnel when the protective device is involved in a diagonal collision with the pier.

[0046] The scheme is further optimized. The connecting components include two connecting plates 3 and several bolts 4. The two connecting plates 3 are respectively set on the inner walls of two adjacent ECC protective hanging plates 1. The several bolts 4 penetrate the inner walls of the two adjacent ECC protective hanging plates 1 and are threadedly connected to the two connecting plates 3.

[0047] In this embodiment, the connecting plate 3 is made of stainless steel, and the bolts 4 are high-strength bolts; the number of bolts 4 is 4 to 6.

[0048] To further optimize the design, the connecting plate 3 has several first threaded holes, and the side wall of the ECC protective hanging plate 1 has second threaded holes corresponding to the first threaded holes. Both the first threaded holes and the second threaded holes are threadedly connected to the bolts 4.

[0049] Further optimization of the design: the ECC protective panel 1 has two ECC ribs integrally formed inside; the configuration formed by the ECC ribs and the ECC protective panel 1 can ensure that two adjacent ECC protective panels 1 can be connected by bolts, and when the ECC protective panel 1 is squeezed, the ECC ribs can bend and deform to share part of the impact force, effectively reducing the impact force and achieving the protection of vehicles and bridge piers 5.

[0050] Further optimizing the scheme, the flexible fiber waste particle filling layer 2 includes a fiber bag and flexible fiber granules filled inside the fiber bag; the fiber bag is formed in one step by adhesive bonding or 3D weaving technology. In this embodiment, the fiber bag is a flexible lattice structure fiber bag, and its lattice form includes rectangular, triangular, and trapezoidal shapes; the lattice size of the fiber bag includes 150mm×100mm and 100mm×50mm;

[0051] The fiber bag is fixedly installed on the inner wall of the ECC protective hanging plate 1.

[0052] A further optimized scheme is proposed, in which the flexible fiber granules include ceramsite, recycled concrete aggregate, and recycled brick slag particles; the content of the ceramsite is not less than 40%; the particle size of the recycled brick slag particles is 0.2mm to 8mm; in this embodiment, it is preferably 0.3mm to 4.75mm.

[0053] The flexible fiber granules also include basalt fibers, which have advantages such as high temperature resistance, corrosion resistance, environmental friendliness, and low price. When impacted, the flexible fiber granules harden and are locked in place by the basalt fibers, causing a large number of ceramsite particles to break. The voids inside the broken ceramsite particles are filled by other construction solid waste. Through the sliding friction between the flexible fiber granules, some of the impact energy is dissipated, while ensuring that the flexible fiber waste particle filling layer 2 can undergo large deformation.

[0054] This invention also provides an ECC-construction solid waste flexible composite bridge pier protection method, comprising the following steps:

[0055] Step 1: Prepare ECC protective panel 1; Select the following based on the size, shape, and working conditions of the pier 5: thickness, fiber content, and punching size of ECC protective panel 1; fit and density of flexible fiber waste particle filling layer 2; size of connecting plate 3, and thus determine bolt type 4.

[0056] Step 2: Attach the fiber cloth bag to the inner wall of ECC protective panel 1 and seal the bottom of the fiber cloth bag;

[0057] Step 3: Fill the fiber bag with flexible fiber granules and seal the top of the fiber bag;

[0058] Step 4: Clean the surface of pier 5 and attach several ECC protective panels 1 tightly to the outer wall of pier 5;

[0059] Step 5: Assemble and fix several ECC protective mounting plates 1 using the connecting components.

[0060] Further optimization of the plan, step one specifically includes:

[0061] Add the raw materials and water to the mixer and stir; then add the silicone defoamer, early-strength polycarboxylate superplasticizer and water to the mixer and stir.

[0062] Add steel fibers to the mixer, then add water and mix.

[0063] Pour into the mold and vibrate;

[0064] Curing and hardening to shape.

[0065] Further optimization of the scheme involves raw materials including cement, coarse aggregate, fine aggregate, quartz sand, silica fume, fly ash, polyvinyl alcohol fiber, and epoxy resin. The ECC protective panel 1, made of high-ductility fiber-reinforced cement-based composite material, replaces metal as the external metal skeleton structure. The flexible fiber waste particle filling layer 2 works synergistically to effectively regulate the load transferred to the pier 5 and absorb a large amount of impact energy. This approach maintains the advantages of the sandwich flexible protective device while enhancing its durability and reducing construction and maintenance costs.

[0066] To further optimize the scheme, in step four, the surface of the bridge pier 5 is cleaned within a height range of 1.0m to 1.5m from the ground; in this embodiment, the preferred height is 1.0m to 1.2m.

[0067] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0068] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. ECC-Flexible Combined Pier Protection Device for Construction Solid Waste, characterized in that: It includes several ECC protective panels (1), and the several ECC protective panels (1) together form an annular cavity, which is used to wrap the bridge pier (5); The two adjacent ECC protective panels (1) are detachably connected by a connecting assembly, and the inner wall of the ECC protective panel (1) is in contact with the outer wall of the pier (5); The ECC protective panel (1) is provided with a flexible fiber waste particle filling layer (2); The ECC protective panel (1) has two ECC ribs integrally formed inside; The thickness of the frontal impact surface of the ECC protective plate (1) is greater than the thickness of the back impact surface and the thickness of the ECC rib; the two sides of the frontal impact surface turn inward, and the corner surface, the inclined surface and the ECC rib form two triangular prisms with right-angled triangles as the base. The connecting component is located inside a triangular prism of a right triangle; The end face of the ECC protective hanging plate (1) away from the pier (5) is provided with an inner groove. The depth of the inner groove is 1 / 3 of the thickness of the ECC protective hanging plate (1), and the shape of the inner groove is an isosceles trapezoid.

2. The ECC-construction solid waste flexible composite bridge pier protection device according to claim 1, characterized in that: The connecting assembly includes two connecting plates (3) and several bolts (4). The two connecting plates (3) are respectively disposed on the inner walls of the two adjacent ECC protective hanging plates (1). The several bolts (4) penetrate the inner walls of the two adjacent ECC protective hanging plates (1) and are threadedly connected to the two connecting plates (3).

3. The ECC-construction solid waste flexible composite bridge pier protection device according to claim 2, characterized in that: The connecting plate (3) has a plurality of first threaded holes, and the side wall of the ECC protective hanging plate (1) has a second threaded hole corresponding to the first threaded hole. The first threaded hole and the second threaded hole are both threadedly connected to the bolt (4).

4. The ECC-construction solid waste flexible composite bridge pier protection device according to claim 1, characterized in that: The flexible fiber waste particle filling layer (2) includes a fiber bag and flexible fiber granules filled in the fiber bag; The fiber bag is fixedly installed on the inner wall of the ECC protective hanging plate (1).

5. The ECC-construction solid waste flexible composite bridge pier protection device according to claim 4, characterized in that: The flexible fiber granules include ceramsite, recycled concrete aggregate, and recycled brick slag particles; the content of ceramsite is not less than 40%; the particle size of the recycled brick slag particles is 0.2mm to 8mm.

6. An ECC-construction solid waste flexible composite bridge pier protection method, based on the ECC-construction solid waste flexible composite bridge pier protection device according to any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Prepare ECC protective mounting plate (1); Step 2: Attach the fiber cloth bag to the inner wall of the ECC protective hanging plate (1) and seal the bottom of the fiber cloth bag; Step 3: Fill the fiber bag with flexible fiber granules and seal the top of the fiber bag; Step 4: Clean the surface of the pier (5) and attach several ECC protective panels (1) tightly to the outer wall of the pier (5); Step 5: Assemble and fix several ECC protective mounting plates (1) by connecting components.

7. The ECC-construction solid waste flexible composite bridge pier protection method according to claim 6, characterized in that: Step one specifically includes: Add the raw materials and water to the mixer and stir; then add the silicone defoamer, early-strength polycarboxylate superplasticizer and water to the mixer and stir. Add steel fibers to the mixer, then add water and mix. Pour into the mold and vibrate; Curing and hardening to shape.

8. The ECC-construction solid waste flexible composite bridge pier protection method according to claim 6, characterized in that: In step four, the surface of the bridge pier (5) is cleaned within a height range of 1.0m to 1.5m from the ground.

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