Fully-prefabricated concrete retaining wall and construction method

Abstract

The invention relates to the field of retaining wall construction engineering, in particular to a fully-prefabricated concrete retaining wall and a construction method.The fully-prefabricated concrete retaining wall comprises a plurality of prefabricated concrete retaining wall units arranged on a retaining wall foundation, and the side portions of every two adjacent prefabricated concrete retaining wall units are in butt joint; the bottoms of the prefabricated concrete retaining wall units are arranged on the rear connecting pieces and the front connecting pieces on the retaining wall foundation in a sleeving mode through the penetrating holes and the inserting holes. Every two adjacent prefabricated concrete retaining wall units are connected through the corresponding connecting plates. And the prefabricated parts are produced in a factory through high-precision molds, and compared with a traditional cast-in-place process, generation of construction waste can be greatly reduced. Meanwhile, a large number of wood formworks are omitted, wood resources are effectively saved, the green building and sustainable development concepts vigorously advocated at present are met, and good environmental benefits are achieved.

Description

Technical Field

[0001] The present invention relates to the field of retaining wall construction engineering, in particular to a fully prefabricated assembled concrete retaining wall and a construction method. Background Art

[0002] The construction industry is undergoing a profound transformation from large-scale infrastructure construction to high-quality improvements. In the construction of mid- to high-end residential communities and industrial parks, site landscape design has transcended the limitations of traditional flat layouts, exhibiting a rich, diverse, multi-layered, and three-dimensional development trend. To rationally address the spatial connection and structural support issues caused by terrain elevation differences, retaining walls, as an indispensable structural component, are seeing their application scenarios continue to expand and their frequency of use is increasing.

[0003] However, the traditional reinforced concrete gravity retaining walls currently in widespread use mostly rely on on-site formwork and cast-in-place construction. This traditional construction method has exposed many drawbacks that are difficult to ignore over the long term: First, during the construction process, a large number of wooden formwork support systems must be built, resulting in excessive consumption of timber resources; second, concrete pouring not only generates a large amount of difficult-to-handle construction waste, but also causes serious construction dust pollution, which has a negative impact on the surrounding ecological environment and the health of construction workers; third, the cast-in-place process involves numerous wet work processes, which are complex and cumbersome. This not only leads to a lengthy construction period, but is also easily restricted by external climatic conditions such as inclement weather, making it difficult to control the construction progress and low project efficiency. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the existing technology and provide an effective solution to the problems of low construction efficiency and huge resource consumption in traditional construction methods, thereby improving the construction quality and construction efficiency of retaining wall projects, reducing the impact on the environment, and providing a better quality, more environmentally friendly and more efficient retaining wall solution for the civil engineering field.

[0005] The technical solution to achieve the above purpose is:

[0006] The present invention provides a fully prefabricated assembled concrete retaining wall, comprising a plurality of prefabricated concrete retaining wall units placed on a retaining wall foundation, wherein the sides of two adjacent prefabricated concrete retaining wall units are butt-jointed;

[0007] The bottom of the precast concrete retaining wall unit is formed with a support leg structure extending toward the soil-retaining side, and the support leg structure is provided with a through hole penetrating the upper and lower surfaces, and the through hole can be sleeved on a rear connecting piece pre-installed on the retaining wall foundation, and then fixedly connected to the retaining wall foundation through the rear connecting piece;

[0008] The bottom of the precast concrete retaining wall unit is provided with a plug hole, and the soil-facing side of the precast concrete retaining wall unit is provided with an operating hole connected to the plug hole. The plug hole can be sleeved on a front connecting piece pre-installed on the retaining wall foundation, and then the front connecting piece is connected and fixed to the precast concrete retaining wall unit through the operating hole.

[0009] The precast concrete retaining wall unit is provided with connecting grooves near the side of the back-to-soil side and the front-to-soil side. When two adjacent precast concrete retaining wall units are butt-connected, the two connecting grooves are connected to each other, and then a connecting plate is provided in the connecting groove. The connecting plate is connected to the corresponding precast concrete retaining wall unit to achieve the connection of the two adjacent precast concrete retaining wall units.

[0010] A further improvement of the fully prefabricated assembled concrete retaining wall of the present invention is that the prefabricated concrete retaining wall unit is pre-buried with a sleeve at the connecting groove, and the sleeve passes through the soil-facing side and the soil-receiving side of the prefabricated concrete retaining wall unit;

[0011] The connecting plate is provided with a connecting hole corresponding to the sleeve, and connecting bolts are inserted into the connecting hole and the sleeve, and the connecting plate and the precast concrete retaining wall unit are connected by the connecting bolts.

[0012] A further improvement of the fully prefabricated assembled concrete retaining wall of the present invention is that the bottom of the support structure is provided with a tenon extending downwards;

[0013] The top of the retaining wall foundation is correspondingly provided with a groove matching the tenon;

[0014] When the precast concrete retaining wall unit is erected on the retaining wall foundation, the tenon is placed in the groove.

[0015] A further improvement of the fully prefabricated assembled concrete retaining wall of the present invention is that it also includes a front connecting plate placed in the operating hole and sleeved on the front connecting member, and the front connecting plate is fastened to the front connecting member.

[0016] A further improvement of the fully prefabricated assembled concrete retaining wall of the present invention is that it also includes a waterproof roll pasted on the back soil side of the prefabricated concrete retaining wall unit, and part of the waterproof roll is also pasted on another adjacent prefabricated concrete retaining wall unit.

[0017] The present invention also provides a construction method for a fully prefabricated assembled concrete retaining wall, comprising the following steps:

[0018] Step S1: When constructing the retaining wall foundation, pre-install front connectors and rear connectors corresponding to the installation positions of the precast concrete retaining wall units;

[0019] Step S2: providing a prefabricated concrete retaining wall unit, wherein the bottom of the prefabricated concrete retaining wall unit is formed with a support leg structure extending toward the soil-facing side, the support leg structure being provided with through holes penetrating the upper and lower surfaces, the bottom of the prefabricated concrete retaining wall unit being provided with a plug hole, and the soil-facing side of the prefabricated concrete retaining wall unit being provided with an operating hole connected to the plug hole;

[0020] Step S3: erecting the precast concrete retaining wall unit on the retaining wall foundation, and sleeve the through hole on the rear connecting member, sleeve the plug hole on the front connecting member, and then connect and fix the rear connecting member to the support leg structure, and connect and fix the front connecting member to the precast concrete retaining wall unit using the operating hole;

[0021] Step S4, repeating step S3 to install the next precast concrete retaining wall unit, and performing butt connection between two adjacent precast concrete retaining wall units through a connecting plate;

[0022] Step S5, repeat step S4 until the retaining wall construction is completed.

[0023] A further improvement of the construction method of the fully prefabricated assembled concrete retaining wall of the present invention is that the prefabricated concrete retaining wall unit provided in step S2 is provided with connecting grooves near the side portions of the soil-facing side and the soil-facing side. After the two adjacent prefabricated concrete retaining wall units are installed on the retaining wall foundation, the connecting grooves on the two prefabricated concrete retaining wall units are connected.

[0024] When the butt connection is performed through the connection plate, the connection plate is placed in the connection groove, and then the connection plate is connected to the corresponding precast concrete retaining wall unit.

[0025] A further improvement of the construction method of the fully prefabricated assembled concrete retaining wall of the present invention is that a sleeve is pre-embedded in the connection groove of the provided prefabricated concrete retaining wall unit, and the sleeve passes through the soil-facing side and the soil-receiving side of the prefabricated concrete retaining wall unit;

[0026] After placing the connecting plate in the connecting groove, align the connecting holes provided on the connecting plate with the corresponding sleeves, then insert connecting bolts into the connecting holes and the sleeves, and use the connecting bolts to connect the connecting plate and the precast concrete retaining wall unit.

[0027] A further improvement of the construction method of the fully prefabricated assembled concrete retaining wall of the present invention is that, when constructing the retaining wall foundation, grooves are provided on the retaining wall foundation corresponding to the installation positions of the prefabricated concrete retaining wall units;

[0028] The bottom of the support structure of the provided precast concrete retaining wall unit is provided with a downwardly extending tenon. When the precast concrete retaining wall unit is erected on the retaining wall foundation, the tenon on the precast concrete retaining wall unit is inserted into the corresponding groove to locate the installation position of the precast concrete retaining wall unit.

[0029] A further improvement of the construction method of the fully prefabricated assembled concrete retaining wall of the present invention is that after all the prefabricated concrete retaining wall units are installed, a waterproof membrane is provided, the provided waterproof membrane is pasted on the back soil side of the prefabricated concrete retaining wall unit, and a portion of the waterproof membrane is pasted on another adjacent prefabricated concrete retaining wall unit.

[0030] The beneficial effects of the fully prefabricated assembled concrete retaining wall and construction method of the present invention are:

[0031] Precise positioning: The unique mortise and groove design (tenon and groove) realizes the initial positioning of the precast concrete retaining wall unit, while the cooperation between the front connector and the plug hole and the rear connector and the through hole completes the precise positioning in space. Coupled with the precise control of the gap, the accuracy of the installation of the precast concrete retaining wall unit is guaranteed from multiple links, bringing the positioning accuracy of the overall retaining wall structure to a new level.

[0032] Excellent seismic performance: Stable and reliable anchoring nodes and the integral assembly structure can effectively disperse and absorb seismic energy, significantly improving the seismic resistance of the retaining wall under natural disasters such as earthquakes, and providing strong protection for the safety of the retaining wall.

[0033] Short construction period: The use of prefabrication and assembly technology completely eliminates traditional on-site formwork and reduces a significant amount of wet work. Prefabricated components are pre-produced in the factory and require only rapid on-site assembly. This construction model significantly shortens the construction period, effectively accelerating project progress and reducing time costs.

[0034] Environmentally friendly: Prefabricated components are manufactured in-factory using high-precision molds, significantly reducing construction waste compared to traditional cast-in-place processes. Furthermore, eliminating the need for extensive wooden formwork effectively conserves timber resources, aligning with the current trend of green construction and sustainable development, and offering significant environmental benefits.

[0035] Strong adaptability: This invention utilizes a modular design concept, allowing individual precast concrete retaining wall units to be flexibly adjusted and assembled to meet the needs of varying terrain elevations. Whether in complex and varied mountainous terrain or urban sites with varying height differences, this retaining wall structure is highly adaptable and versatile, demonstrating its strong application flexibility and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the installation of a fully prefabricated retaining wall according to the present invention;

[0037] Figure 2 This is a left side schematic diagram of the fully prefabricated assembled retaining wall of the present invention;

[0038] Figure 3 For the present invention Figure 1 Schematic cross-section diagram at 1-1;

[0039] Figure 4 This is a three-dimensional main view schematic diagram of the overall installation of the fully prefabricated assembled retaining wall of the present invention;

[0040] Figure 5 A three-dimensional rear view schematic diagram of the overall installation of the fully prefabricated and assembled retaining wall of the present invention;

[0041] Figure 6 It is a three-dimensional schematic diagram of the installation process of precast concrete retaining wall units in the fully precast assembled retaining wall of the present invention. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] See Figure 1 The present invention provides a fully prefabricated, assembled concrete retaining wall and construction method, designed to address the low construction efficiency and significant resource consumption associated with traditional cast-in-place retaining walls. By prefabricating the retaining wall and installing it on-site, the present invention improves construction efficiency and quality, reduces environmental impact, and facilitates simple and convenient on-site installation. The fully prefabricated, assembled concrete retaining wall and construction method of the present invention are described below with reference to the accompanying drawings.

[0044] See Figure 1 , shows the front view of the installation of the fully prefabricated retaining wall of the present invention. Figure 2 , shows the left side schematic diagram of the fully prefabricated retaining wall of the present invention. Figure 1 and Figure 2 , the structure of the fully prefabricated assembled concrete retaining wall of the present invention is described.

[0045] like Figure 1 and Figure 2 As shown, the fully prefabricated assembled concrete retaining wall of the present invention comprises a plurality of prefabricated concrete retaining wall units 3 placed on a retaining wall foundation 1. The plurality of prefabricated concrete retaining wall units 3 are installed on the retaining wall foundation 1 along the setting position of the retaining wall, wherein the sides of two adjacent prefabricated concrete retaining wall units 3 are butt-jointed. Figure 4As shown, the bottom of the precast concrete retaining wall unit 3 is formed with a support leg structure 3-1 extending toward the back soil side, and the support leg structure 3-1 is provided with a through hole penetrating the upper and lower surfaces, and the through hole can be set on the rear connecting piece 7 pre-installed on the retaining wall foundation 1, and then the support leg structure 3-1 is fixedly connected to the retaining wall foundation 1 through the rear connecting piece 7; the bottom of the precast concrete retaining wall unit 3 is provided with a plug hole, and the soil side of the precast concrete retaining wall unit 3 is provided with an operating hole 4 connected to the plug hole, and the plug hole can be set on the retaining wall foundation A front connecting piece 5 is pre-installed on the earth wall foundation 1, and then the front connecting piece 5 is connected and fixed to the precast concrete retaining wall unit 3 through the operating hole 4; a connecting groove 12 is provided near the side of the back-to-soil side and the front-to-soil side of the precast concrete retaining wall unit 3. When two adjacent precast concrete retaining wall units 3 are docked, the two connecting grooves 12 are connected to each other, and then a connecting plate 9 is provided in the connecting groove 12, and the two adjacent precast concrete retaining wall units 3 are connected by connecting the connecting plate 9 to the corresponding precast concrete retaining wall unit 3 to achieve the connection of the two adjacent precast concrete retaining wall units 3.

[0046] like Figure 2 and Figure 3 As shown, during the construction of the retaining wall foundation 1, front connectors 5 and rear connectors 7 are pre-installed on the retaining wall foundation 1 at the installation positions corresponding to the precast concrete retaining wall units 3 to facilitate the connection of the precast concrete retaining wall units 3. Preferably, two front connectors 5 and two rear connectors 7 are provided on the retaining wall foundation 1 for each precast concrete retaining wall unit 3.

[0047] Furthermore, if Figures 1 to 3 As shown, when installing the precast concrete retaining wall unit 3, align the bottom of the precast concrete retaining wall unit 3 with the corresponding front connector 5 and rear connector 7. Then, lower the precast concrete retaining wall unit 3, pass the front connector 5 through the insertion hole on the precast concrete retaining wall unit 3, and pass the rear connector 7 through the through hole on the support leg structure 3-1. Then, fit the rear connecting plate 8 over the end of the rear connecting plate 7, screw a fastening nut onto the end of the rear connecting plate 7, and tighten the fastening nut to compress the rear connecting plate 8, thus completing the connection between the support leg structure 3-1 and the retaining wall foundation 1. Fit the front connecting plate 6 over the front connecting plate 5 through the operation hole 4, screw a fastening nut onto the end of the front connecting plate 5, and tighten the fastening nut to compress the front connecting plate 6, thus completing the connection between the precast concrete retaining wall unit 3 and the retaining wall foundation 1. Preferably, the front connecting member 5 and the rear connecting member 7 are screws or anchor bolts. When the retaining wall foundation 1 is constructed, the lower parts of the front connecting member 5 and the rear connecting member 7 are pre-buried in the retaining wall foundation 1.

[0048] The size of the reserved hole 4 should meet the operational requirements of being able to selectively tighten the fastening nut. When tightening the fastening nut, use corresponding tools to operate to ensure that the fastening nut is tightened.

[0049] Furthermore, if Figure 1 、 Figure 2 and Figure 6 As shown, the bottom of the support leg structure 3-1 is provided with a downwardly extending tenon 2-2; the top of the retaining wall foundation 1 is correspondingly provided with a groove 2-1 that matches the tenon 2-1. When the precast concrete retaining wall unit 3 is erected on the retaining wall foundation 1, the tenon 2-2 is placed in the groove 2-1. The arrangement of the tenon 2-2 and the groove 2-1 allows for preliminary positioning of the hoisted precast concrete retaining wall unit 3. After this preliminary positioning, the through hole is aligned with the rear connector 7, and the insertion hole is aligned with the front connector 5.

[0050] Furthermore, if Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the precast concrete retaining wall unit 3 is pre-buried with a sleeve 11 at the connecting groove 12, and the sleeve 11 passes through the back-to-soil side and the front-to-soil side of the precast concrete retaining wall unit 3; a connecting hole is provided on the connecting plate 9 corresponding to the sleeve 11, and connecting bolts 10 are inserted into the connecting hole and the sleeve 11, and the connecting plate 9 and the precast concrete retaining wall unit 3 are connected by the connecting bolts 10.

[0051] Connecting grooves 12 are provided on the soil-retaining and soil-retaining sides of the precast concrete retaining wall units 3. These grooves accommodate the corresponding connecting plates 9 and the ends of the corresponding connecting bolts 10, preventing any structure from protruding from the surface of the precast concrete retaining wall units 3. Nuts are screwed onto the ends of the connecting bolts 10 to connect two adjacent precast concrete retaining wall units 3.

[0052] The precast concrete retaining wall unit 3 at the end is provided with a connection groove 12 near one side, and the precast concrete retaining wall unit 3 at the middle is provided with a connection groove 12 near both sides.

[0053] Furthermore, after all precast concrete retaining wall units 3 are installed, Figure 2 As shown, waterproof membrane 13 is attached to the soil-receiving side of a precast concrete retaining wall unit 3, and part of waterproof membrane 13 is also attached to another adjacent precast concrete retaining wall unit 3. Waterproof membrane 13 is EPDM self-adhesive waterproof membrane. When laying the waterproof membrane, the waterproof membrane on the adjacent precast concrete retaining wall unit 3 is partially overlapped to ensure an effective waterproof barrier.

[0054] Furthermore, a lifting ring 14 is provided on the top of the precast concrete retaining wall unit 3 for facilitating the lifting of the precast concrete retaining wall unit 3 .

[0055] Furthermore, a slope structure is formed between the support structure 8 of the precast concrete retaining wall unit 3 and the surface of the soil-removing side of the precast concrete retaining wall unit 3 to improve the structural strength of the precast concrete retaining wall unit 3 .

[0056] Furthermore, the retaining wall foundation 1 is also a prefabricated structure, and can also be a cast-in-place structure.

[0057] Furthermore, the front connecting plate 6, the rear connecting plate 8 and the connecting plate 9 are all made of steel plates.

[0058] The precast concrete retaining wall unit 3 of this invention features an innovative support structure on the soil-facing side. This structural design, fully taking into account the principles of mechanics, significantly enhances the retaining wall's ability to resist overturning under soil pressure, fundamentally improving its stability and safety. Furthermore, a protruding concrete tenon is provided at its base, providing the foundation for subsequent installation and positioning.

[0059] The top of the retaining wall foundation 1 is prefabricated with a groove that precisely matches the tenon. During the installation of the precast concrete retaining wall unit 3, the precise bite between the tenon and the groove can quickly achieve the initial positioning of the precast concrete retaining wall unit 3. This design greatly improves the initial accuracy and convenience of installation.

[0060] High-strength anchor bolts (i.e., front and rear connectors) are pre-embedded within the retaining wall foundation 1, while corresponding through-holes are provided in the base support structure and wall body of the precast concrete retaining wall unit 3. After the precast concrete retaining wall unit 3 is initially positioned, the anchor bolts are accurately inserted into the through-holes, achieving precise spatial positioning of the precast concrete retaining wall unit 3. After each precast concrete retaining wall unit 3 is installed, the anchor bolts are precisely tightened with matching steel pads and high-strength nuts to form a strong and stable anchoring node, ensuring a tight and reliable connection between the precast concrete retaining wall unit 3 and the retaining wall foundation, capable of effectively resisting various external forces.

[0061] Adjacent precast concrete retaining wall units 3 are connected horizontally in a planar manner using high-strength bolts via pre-reserved connection slots. This connection method enables the individual precast concrete retaining wall units 3 to work together, ultimately forming a continuous and overall superior retaining structure, effectively ensuring the overall load-bearing capacity and stability of the retaining wall.

[0062] Among the further optimized design details, the fit between the tenon and groove at the bottom of the precast concrete retaining wall unit 3 has been carefully designed to achieve a unique self-locking and anti-slip function, further enhancing the stability of the precast concrete retaining wall unit 3 after installation and effectively preventing loosening and falling off during use. At the same time, the gap between the diameter of the anchor bolt and the through-hole of the wall panel is strictly controlled to 2-3mm. This precise dimensional control ensures high-precision installation and positioning of the precast concrete retaining wall unit 3, laying a solid foundation for the accuracy and stability of the overall retaining wall structure. In addition, EPDM self-adhesive waterproof membrane is installed on the connecting surface of adjacent precast concrete retaining wall units 3. With its excellent waterproof performance and self-adhesive properties, this waterproof membrane can effectively prevent water penetration, significantly improving the waterproof performance of the retaining wall joints, extending the service life of the retaining wall, and ensuring its normal use under various environmental conditions.

[0063] The present invention also provides a construction method for a fully prefabricated assembled concrete retaining wall, which is described below.

[0064] The construction method of the present invention comprises the following steps:

[0065] Step S1: When constructing the retaining wall foundation, pre-install front connectors and rear connectors corresponding to the installation positions of the precast concrete retaining wall units;

[0066] Step S2: providing a prefabricated concrete retaining wall unit. The prefabricated concrete retaining wall unit has a foot structure formed on its bottom that extends toward the soil-facing side. The foot structure has through-holes extending through the upper and lower surfaces. The prefabricated concrete retaining wall unit also has a plug hole on its bottom, and an operating hole connected to the plug hole on the soil-facing side.

[0067] Step S3: erect the precast concrete retaining wall unit on the retaining wall foundation, and sleeve the through hole on the rear connector, sleeve the plug hole on the front connector, and then connect and fix the rear connector to the support structure, and connect and fix the front connector to the precast concrete retaining wall unit through the operating hole;

[0068] Step S4, repeating step S3 to install the next precast concrete retaining wall unit, and performing butt connection between two adjacent precast concrete retaining wall units through a connecting plate;

[0069] Step S5, repeat step S4 until the retaining wall construction is completed.

[0070] In a specific embodiment of the present invention, the precast concrete retaining wall unit provided in step S2 is provided with connecting grooves near the side portions of the soil-facing side and the soil-facing side. After the two adjacent precast concrete retaining wall units are installed on the retaining wall foundation, the connecting grooves on the two precast concrete retaining wall units are connected.

[0071] When performing the butt connection through the connection plate, the connection plate is placed in the connection groove, and then the connection plate is connected to the corresponding precast concrete retaining wall unit.

[0072] In a specific embodiment of the present invention, a sleeve is pre-buried in the connection groove of the provided precast concrete retaining wall unit, and the sleeve passes through the back-to-soil side and the front-to-soil side of the precast concrete retaining wall unit;

[0073] After placing the connecting plate in the connecting groove, align the connecting holes provided on the connecting plate with the corresponding sleeves, then insert connecting bolts into the connecting holes and sleeves, and use the connecting bolts to connect the connecting plate and the precast concrete retaining wall unit.

[0074] In a specific embodiment of the present invention, when constructing the retaining wall foundation, a groove is provided on the retaining wall foundation corresponding to the installation position of the precast concrete retaining wall unit;

[0075] The bottom of the support structure of the provided precast concrete retaining wall unit is provided with a downwardly extending tenon. When the precast concrete retaining wall unit is erected on the retaining wall foundation, the tenon on the precast concrete retaining wall unit is inserted into the corresponding groove to locate the installation position of the precast concrete retaining wall unit.

[0076] In a specific embodiment of the present invention, after all precast concrete retaining wall units are installed, a waterproof membrane is provided, and the provided waterproof membrane is pasted on the back soil side of the precast concrete retaining wall unit, and a portion of the waterproof membrane is pasted on another adjacent precast concrete retaining wall unit.

[0077] In a specific embodiment of the present invention, at the construction site, the construction of the retaining wall foundation 1 is first completed in accordance with the design requirements. After the construction is completed, the relevant specifications and standards are strictly followed, and the retaining wall foundation is waited for to meet the specified strength requirements. When the foundation strength is accepted, professional lifting equipment is used to carry out on-site hoisting operations on the precast concrete retaining wall unit 3 to ensure a safe and smooth hoisting process. Based on the precise matching relationship between the tenon 2-2 at the bottom of the precast concrete retaining wall unit 3 and the groove 2-1 of the retaining wall foundation 1, the installation position of the precast concrete retaining wall unit 3 is roughly determined. On the basis of the preliminary positioning, the precast concrete retaining wall unit 3 is accurately installed in the front connector 5 and the rear connector 7 to ensure that the position between the precast concrete retaining wall unit 3 and the front connector and the rear connector accurately corresponds to prepare for the subsequent fastening connection.

[0078] Install the front connecting plate 6 and the rear connecting plate 8 respectively. During the installation process, use the corresponding tools to tighten the bolts. By accurately controlling the torque, the front connecting plate, the rear connecting plate and the front connecting piece, the rear connecting piece and the precast concrete retaining wall unit 3 are tightly connected to ensure that each precast concrete retaining wall unit 3 is firmly installed and meets the designed mechanical performance requirements. At this point, the installation of a precast concrete retaining wall unit 3 is completed.

[0079] Repeat the above steps, positioning and installing subsequent precast concrete retaining wall units 3 in the construction sequence. After each precast concrete retaining wall unit 3 is installed, the two precast concrete retaining wall units 3 installed in front and behind are promptly anchored together using connecting plates 9. High-strength bolts are used to fasten the connecting plates to the pre-reserved sleeves on the precast concrete retaining wall units 3, forming a single unit and gradually constructing a complete retaining wall structure.

[0080] After all precast concrete retaining wall units 3 are installed, carefully apply EPDM self-adhesive waterproof membrane 13 to the joints of the precast concrete retaining wall units 3. During the application process, the width of the waterproof membrane on each precast concrete retaining wall unit 3 is strictly controlled to ensure it is no less than 250mm. This creates an effective waterproof barrier, effectively ensuring the waterproof performance of the retaining wall joints, preventing water leakage from damaging the retaining wall structure, and ensuring the stability and durability of the retaining wall during long-term use. Alternatively, the waterproof membrane 13 can be applied to the entire backside of the precast concrete retaining wall unit 3.

[0081] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A fully prefabricated concrete retaining wall, characterized in that: The invention comprises a plurality of precast concrete retaining wall units placed on a retaining wall foundation, wherein the sides of two adjacent precast concrete retaining wall units are butt-jointed; The bottom of the precast concrete retaining wall unit is formed with a support leg structure extending toward the soil-retaining side, and the support leg structure is provided with a through hole penetrating the upper and lower surfaces, and the through hole can be sleeved on a rear connecting piece pre-installed on the retaining wall foundation, and then fixedly connected to the retaining wall foundation through the rear connecting piece; The bottom of the precast concrete retaining wall unit is provided with a plug hole, and the soil-facing side of the precast concrete retaining wall unit is provided with an operating hole connected to the plug hole. The plug hole can be sleeved on a front connecting piece pre-installed on the retaining wall foundation, and then the front connecting piece is connected and fixed to the precast concrete retaining wall unit through the operating hole. The precast concrete retaining wall unit is provided with connecting grooves near the side of the back-to-soil side and the front-to-soil side. When two adjacent precast concrete retaining wall units are butt-connected, the two connecting grooves are connected to each other, and then a connecting plate is provided in the connecting groove. The connecting plate is connected to the corresponding precast concrete retaining wall unit to achieve the connection of the two adjacent precast concrete retaining wall units.

2. A fully prefabricated assembled concrete retaining wall according to claim 1, characterized in that: The precast concrete retaining wall unit is pre-buried with a sleeve at the connection groove, and the sleeve passes through the soil-facing side and the soil-receiving side of the precast concrete retaining wall unit; The connecting plate is provided with a connecting hole corresponding to the sleeve, and connecting bolts are inserted into the connecting hole and the sleeve, and the connecting plate and the precast concrete retaining wall unit are connected by the connecting bolts.

3. A fully prefabricated assembled concrete retaining wall according to claim 1, characterized in that: The bottom of the support leg structure is provided with a tenon extending downwards; The top of the retaining wall foundation is correspondingly provided with a groove matching the tenon; When the precast concrete retaining wall unit is erected on the retaining wall foundation, the tenon is placed in the groove.

4. A fully prefabricated assembled concrete retaining wall according to claim 1, characterized in that: It also includes a front connecting plate placed in the operating hole and sleeved on the front connecting piece, and the front connecting plate is fastened to the front connecting piece.

5. The fully prefabricated assembled concrete retaining wall according to claim 1, characterized in that: It also includes a waterproof roll material pasted on the back soil side of the precast concrete retaining wall unit, and a part of the waterproof roll material is pasted on another adjacent precast concrete retaining wall unit.

6. A construction method for a fully prefabricated assembled concrete retaining wall, characterized in that: The steps include: Step S1: When constructing the retaining wall foundation, pre-install front connectors and rear connectors corresponding to the installation positions of the precast concrete retaining wall units; Step S2: providing a prefabricated concrete retaining wall unit, wherein the bottom of the prefabricated concrete retaining wall unit is formed with a support leg structure extending toward the soil-facing side, the support leg structure being provided with through holes penetrating the upper and lower surfaces, the bottom of the prefabricated concrete retaining wall unit being provided with a plug hole, and the soil-facing side of the prefabricated concrete retaining wall unit being provided with an operating hole connected to the plug hole; Step S3: erecting the precast concrete retaining wall unit on the retaining wall foundation, and sleeve the through hole on the rear connecting member, sleeve the plug hole on the front connecting member, and then connect and fix the rear connecting member to the support leg structure, and connect and fix the front connecting member to the precast concrete retaining wall unit using the operating hole; Step S4, repeating step S3 to install the next precast concrete retaining wall unit, and performing butt connection between two adjacent precast concrete retaining wall units through a connecting plate; Step S5, repeat step S4 until the retaining wall construction is completed.

7. The construction method of a fully prefabricated assembled concrete retaining wall according to claim 6, characterized in that: The precast concrete retaining wall units provided in step S2 are provided with connecting grooves near the sides thereof on the soil-facing side and the soil-facing side thereof. After the two adjacent precast concrete retaining wall units are installed on the retaining wall foundation, the connecting grooves on the two precast concrete retaining wall units are connected. When the butt connection is performed through the connection plate, the connection plate is placed in the connection groove, and then the connection plate is connected to the corresponding precast concrete retaining wall unit.

8. The construction method of a fully prefabricated assembled concrete retaining wall according to claim 7, characterized in that: The connection groove of the provided precast concrete retaining wall unit is pre-buried with a sleeve, which passes through the back-to-soil side and the front-to-soil side of the precast concrete retaining wall unit; After placing the connecting plate in the connecting groove, align the connecting holes provided on the connecting plate with the corresponding sleeves, then insert connecting bolts into the connecting holes and the sleeves, and use the connecting bolts to connect the connecting plate and the precast concrete retaining wall unit.

9. The construction method of a fully prefabricated assembled concrete retaining wall according to claim 6, characterized in that: When constructing the retaining wall foundation, a groove is provided on the retaining wall foundation corresponding to the installation position of the precast concrete retaining wall unit; The bottom of the support structure of the provided precast concrete retaining wall unit is provided with a downwardly extending tenon. When the precast concrete retaining wall unit is erected on the retaining wall foundation, the tenon on the precast concrete retaining wall unit is inserted into the corresponding groove to locate the installation position of the precast concrete retaining wall unit.

10. The construction method of a fully prefabricated assembled concrete retaining wall according to claim 6, characterized in that: After all precast concrete retaining wall units are installed, waterproof membranes are provided and pasted on the back soil side of the precast concrete retaining wall units, and part of the waterproof membranes are pasted on another adjacent precast concrete retaining wall unit.

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