Large-cantilever light durable UHPC retaining wall

Abstract

The utility model discloses a large cantilever light durable UHPC retaining wall which comprises a retaining wall body formed by pouring ultra-high performance concrete and a CFRP anchor cable, the retaining wall body is composed of a pair of T-shaped retaining wall units, and each retaining wall unit is composed of a bottom plate at the bottom and a face plate arranged on the upper surface of the bottom plate in the longitudinal direction. The two ends of the CFRP anchor cable are anchored in the panels of the two retaining wall bodies correspondingly so that the two retaining wall bodies can be connected. The retaining wall provided by the utility model has excellent corrosion resistance, small volume and light weight, particularly in a soft foundation section, the construction is more convenient due to lighter self weight, and the requirement on the foundation is relatively low; the retaining wall is a large-cantilever retaining wall, under the condition that the height of the retaining wall exceeds 12 meters, the weight of the wall body is lighter, the height is higher, and the advantages are particularly prominent; the CFRP anchor cables are used for connecting the UHPC panels, the excellent anti-overturning capacity is achieved, and the stability of the whole structure is guaranteed.

Description

Technical Field

[0001] The utility model relates to a retaining wall, in particular to a large cantilever light and durable UHPC retaining wall. Background Art

[0002] A retaining wall is an engineering structure used to prevent soil from sliding, collapsing or moving sideways. It is commonly used in civil engineering to protect slopes, support roadbeds, river embankments, foundation pits, etc. Retaining walls are designed to provide stable support to prevent uncontrolled movement of soil and rock, thereby protecting surrounding structures and areas. There are many structural types of retaining walls, such as gravity retaining walls, cantilever retaining walls, retaining dams, etc. Each type of retaining wall has its specific application scenarios and design principles. Common retaining wall materials are concrete, steel bars, rock or geosynthetics, etc. The choice of these materials depends on the design requirements, soil properties and engineering environment.

[0003] Traditional masonry retaining walls have the disadvantages of being large and heavy, and have very high requirements for the bearing capacity of the base. In soft base sections with poor geology, in order to meet the requirements of the bearing capacity of the base, various methods of base treatment are required; although traditional lightweight retaining walls have advantages in weight, when the height of the retaining wall exceeds 12 meters, its anti-overturning ability may be significantly weakened. In this case, due to the deadweight of the soil and other possible external factors, such as earthquakes or water pressure, the wall is susceptible to tilting and overturning, thereby affecting the stability of the overall structure. Utility Model Content

[0004] The utility model aims to provide a large cantilever light and durable UHPC retaining wall which is small in size, light in weight, convenient in construction, has low requirements on foundation and can ensure the stability of the overall structure.

[0005] The purpose of the utility model is achieved through the following technical measures: a large cantilever lightweight durable UHPC retaining wall, characterized in that it includes a retaining wall body and CFRP anchor cables cast by ultra-high performance concrete, the retaining wall body is composed of a pair of T-shaped retaining wall individuals, the retaining wall individuals are composed of a bottom plate at the bottom and a panel arranged on the upper surface of the bottom plate along the longitudinal direction, and the two ends of the CFRP anchor cables are respectively anchored in the panels of the two retaining wall individuals to connect the two retaining wall individuals.

[0006] The utility model adopts ultra-high performance concrete material, so that the retaining wall has excellent corrosion resistance, and because of the use of lightweight UHPC material, the retaining wall of the utility model is small in size and light in weight, overcoming the defects of traditional retaining walls that are large in size and heavy in weight. Especially in soft base sections, the lighter deadweight of the utility model makes construction more convenient, and the requirements for the foundation are relatively low; the utility model is a "large cantilever" retaining wall. When the height of the retaining wall exceeds 12 meters, compared with the traditional retaining wall, the wall itself is lighter in weight and higher in height, and the advantages are particularly prominent; in addition, since CFRP (carbon fiber reinforced polymer) anchor cables are used to connect the UHPC panels, the utility model not only has excellent anti-overturning ability, but also ensures the stability of the overall structure.

[0007] The CFRP anchor cables of the utility model are arranged in parallel along the longitudinal direction of the panel, and the CFRP anchor cables are located at the bottom and the top of the panel.

[0008] The parallel spacing of the CFRP anchor cables of the utility model is 3 meters, the distance between the CFRP anchor cables at the bottom of the panel and the top edge of the panel is 2 / 3 of the panel height, and the distance between the CFRP anchor cables at the top of the panel and the top edge of the panel is 1 / 3 of the panel height.

[0009] The height of the retaining wall of the utility model is greater than 12 meters. When the height of the retaining wall of the utility model exceeds 12 meters, compared with the traditional retaining wall, the wall itself is lighter and higher, and the advantages of the utility model are particularly prominent.

[0010] The panel and the base plate of the utility model are connected by the criss-crossed transverse steel bars and the longitudinal steel bars therein, and are cast into one piece by ultra-high performance concrete, so as to increase the strength of the UHPC panel and the UHPC base plate, and the criss-crossed steel bars increase the mutual force and reduce the stress.

[0011] Compared with the prior art, the utility model has the following significant effects:

[0012] ⑴ The utility model adopts ultra-high performance concrete material, which makes the retaining wall have excellent corrosion resistance. Moreover, due to the use of lightweight UHPC material, the retaining wall of the utility model is small in size and light in weight, overcoming the defects of traditional retaining walls that are bulky and heavy in weight. Especially in the soft base section, the lighter deadweight of the utility model makes the construction more convenient, and the requirements for the foundation are relatively low.

[0013] (2) The utility model is a "large cantilever" retaining wall. When the height of the retaining wall exceeds 12 meters, compared with the traditional retaining wall, the wall itself is lighter and higher, and its advantages are particularly prominent.

[0014] (3) Since the utility model uses CFRP (carbon fiber reinforced polymer) anchor cables to connect the UHPC panels, the utility model not only has excellent anti-overturning ability, but also ensures the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is the front view of the utility model;

[0018] Figure 3 It is a top view of the utility model;

[0019] Figure 4 It is a schematic diagram of reinforcement of the utility model. DETAILED DESCRIPTION

[0020] The present invention is further illustrated below through the description of specific implementation methods, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not deviate from the basic idea of ​​the present invention, they are all within the protection scope of the present invention.

[0021] like Figures 1 to 4 As shown, the utility model is a large cantilever lightweight durable UHPC retaining wall, including a retaining wall body 5 and a CFRP anchor cable 3 cast by ultra-high performance concrete. The retaining wall body 5 is composed of a pair of T-shaped retaining wall individuals 4. The retaining wall individual 4 is composed of a bottom plate 2 and a panel 1 longitudinally arranged on the upper surface of the bottom plate 2. The two ends of the CFRP anchor cable 3 are respectively anchored in the panels 1 of the two retaining wall individuals 4 to connect the two retaining wall individuals 4.

[0022] UHPC panels and UHPC base plates are made of ultra-high performance concrete, which effectively reduces the deadweight of the structure while improving its durability.

[0023] The CFRP anchor cables 3 are arranged in parallel along the longitudinal direction of the panel 1, and the CFRP anchor cables 3 are located at the bottom and top of the panel 1. The parallel interval of the CFRP anchor cables 3 is 3 meters, the distance between the CFRP anchor cables 3 located at the bottom of the panel 1 and the top edge of the panel 1 is 2 / 3 of the height of the panel 1, and the distance between the CFRP anchor cables 3 located at the top of the panel 1 and the top edge of the panel 1 is 1 / 3 of the height of the panel 1. The CFRP anchor cables 3 connect the two retaining wall individuals 4 into a whole. When there is a horizontal thrust acting on the UHPC panel, the CFRP anchor cables 3 can effectively offset the bending moment, thereby enhancing the anti-overturning ability.

[0024] The panel 1 and the bottom plate 2 are connected by the crisscrossing transverse and longitudinal steel bars therein and cast into one piece by ultra-high performance concrete, thereby increasing the strength of the UHPC panel and the UHPC bottom plate, and the crisscrossing steel bars increase the mutual force and reduce the stress.

[0025] A construction method of the above-mentioned large cantilever lightweight durable UHPC retaining wall comprises the following steps:

[0026] S1. After laying out the baseline of the assembled gravity retaining wall, excavate to the bottom height of the gravel cushion layer, backfill the gravel cushion layer, compact it, and then construct the concrete leveling layer;

[0027] S2. Construct two bottom plates on the concrete leveling layer, that is, tie the foundation steel bars on site, cast the retaining wall foundation concrete in the formwork, and do a good job of maintenance and roughening the construction joints;

[0028] S3, construct two panels, that is, first set up scaffolding, tie wall reinforcement on site, then install CFRP anchor cables, combine steel formwork, and pour wall concrete;

[0029] S4. Backfill the roadbed soil.

[0030] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A large cantilever, lightweight and durable UHPC retaining wall, characterized by: It includes a retaining wall body and CFRP anchor cables cast with ultra-high performance concrete. The retaining wall body is composed of a pair of T-shaped retaining wall individuals. The retaining wall individuals are composed of a bottom plate at the bottom and a panel arranged on the upper surface of the bottom plate along the longitudinal direction. The two ends of the CFRP anchor cables are respectively anchored in the panels of the two retaining wall individuals to connect the two retaining wall individuals.

2. The large cantilever lightweight durable UHPC retaining wall according to claim 1 is characterized in that: The CFRP anchor cables are arranged in parallel along the longitudinal direction of the panel, and the CFRP anchor cables are located at the bottom and the top of the panel.

3. The large cantilever lightweight durable UHPC retaining wall according to claim 2 is characterized in that: The side-by-side spacing of the CFRP anchor cables is 3 meters, the distance between the CFRP anchor cables at the bottom of the panel and the top edge of the panel is 2 / 3 of the panel height, and the distance between the CFRP anchor cables at the top of the panel and the top edge of the panel is 1 / 3 of the panel height.

4. The large cantilever lightweight durable UHPC retaining wall according to claim 3 is characterized in that: The height of the retaining wall is greater than 12 meters.

5. The large cantilever lightweight durable UHPC retaining wall according to claim 4 is characterized in that: The panel and the bottom plate are connected by the crisscrossing transverse and longitudinal steel bars therein, and are cast into one piece by ultra-high performance concrete.

Images