Prefabricated retaining wall for borehole foundations of power transmission lines

Abstract

This application provides a prefabricated retaining wall for bored foundations of power transmission lines. The prefabricated retaining wall includes at least one section composed of multiple retaining wall segments. The top surface of the retaining wall has a first groove, and the bottom surface has a first protrusion corresponding to the first groove. During assembly within the bored foundation, the prefabricated retaining wall can be interlocked with the other retaining walls through the first groove on the top surface and the first protrusion on the bottom surface. This method aims to improve the construction efficiency and safety of bored foundations for power transmission lines.

Description

Technical Field

[0001] This application relates to the field of foundation pit support structures, and in particular to a prefabricated retaining wall for a borehole foundation for power transmission lines. Background Technology

[0002] Drilled foundations for power transmission are a key technology in the construction of tower foundations in power engineering. They are mainly used for tower foundation construction in complex terrain conditions such as mountainous and hilly areas, and can also be used in geological sections with good soil verticality and no groundwater in flat and hilly terrain conditions.

[0003] Currently, the construction of concrete retaining walls for power transmission borehole foundations mainly adopts a segmented cast-in-place process. The specific process includes: layered excavation of the borehole → formwork erection for the borehole wall → pouring of concrete retaining walls → curing to the design strength → continuing excavation of the next layer, repeating the process until the design depth is reached. This process effectively prevents borehole wall collapse through the immediate support of the concrete retaining walls, ensuring foundation stability and construction safety.

[0004] However, the intermittent nature of segmented construction significantly prolongs the construction period, and quality defects at the joints of the retaining wall pose a safety risk to workers inside the foundation pit. Therefore, there is an urgent need for a new technological solution that can balance efficient construction with continuous retaining wall construction to further improve the construction safety of power transmission borehole foundations. Utility Model Content

[0005] The prefabricated retaining wall of the borehole foundation for power transmission lines provided in this application embodiment is used to improve the safety of the borehole foundation for power transmission lines.

[0006] In a first aspect, embodiments of this application provide a prefabricated retaining wall for a borehole foundation of a power transmission line, comprising:

[0007] At least one protective wall section; the protective wall is composed of multiple protective wall segments;

[0008] The top surface of the protective wall is provided with a first groove, and the bottom surface of the protective wall is provided with a first protrusion; the first protrusion matches the first groove.

[0009] In one example, the first side of the protective wall segment is provided with a third groove, and the second side of the protective wall segment is provided with a fourth protrusion; the third groove matches the fourth protrusion;

[0010] When multiple protective wall segments are combined, the first side of one protective wall segment is fitted with the second side of another protective wall segment.

[0011] In one example, the plurality of wall panels are fixed together by an adhesive.

[0012] In one example, the outer surface of the protective wall is provided with multiple evenly distributed second grooves.

[0013] In one example, the second groove is a vertical groove; or, the second groove is a first spiral groove.

[0014] In one example, when the second groove is a vertical groove, the second groove can also be a circumferential groove; the circumferential groove and the vertical groove intersect to form a mesh structure.

[0015] In one example, when the second groove is a first spiral groove, the second groove can also be a second spiral groove; the first spiral groove and the second spiral groove have opposite inclination angles; the first spiral groove and the second spiral groove are interlaced to form a mesh structure.

[0016] In one example, when multiple protective walls are included, if the first protrusion on the bottom surface of the upper protective wall engages with the first groove on the top surface of the lower protective wall, then the second groove of the upper protective wall connects with the second groove of the lower protective wall.

[0017] In one example, the inner surface of the retaining wall is provided with a plurality of second protrusions.

[0018] In one example, when the protective wall is placed at the top, a locking slot may be provided on the outer surface of the protective wall near the top; the locking slot is an annular disc.

[0019] In one example, the lock has multiple fixing holes evenly distributed on it.

[0020] In one example, when the retaining wall is placed at the bottommost section, the bottom of the retaining wall is flat.

[0021] In one example, the retaining wall is internally reinforced with steel bars.

[0022] The prefabricated retaining wall of the borehole foundation for power transmission lines provided in this application embodiment is assembled within the borehole foundation by forming at least one retaining wall section from multiple retaining wall segments. Furthermore, the first groove on the top surface of the retaining wall and the first protrusion on the bottom surface of the retaining wall enable the interlocking of multiple retaining walls, thereby improving the construction efficiency and safety of the borehole foundation for power transmission lines. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] Figure 1 This is a structural schematic diagram of the prefabricated retaining wall provided in this application;

[0025] Figure 2 A top view of the retaining wall provided for this application;

[0026] Figure 3 Bottom view of the retaining wall provided for this application;

[0027] Figure 4 This is a view of the outer surface of the retaining wall provided in this application;

[0028] Figure 5 An unfolded view of the inner side of the retaining wall provided in this application;

[0029] Figure 6 The structural schematic diagram of the first section of the retaining wall provided in this application;

[0030] Figure 7 This is a schematic diagram of the lock's structure provided in this application;

[0031] Figure 8 This is a structural schematic diagram of the tail section retaining wall provided in this application;

[0032] Figure 9 A schematic diagram of the structure of the hole-type foundation provided in this application.

[0033] Figure Labels

[0034] 100 - Prefabricated wall retaining; 110 - Wall retaining;

[0035] 111 - Wall protection segment; 1111 - Third groove; 1112 - Fourth groove;

[0036] 112 - First groove; 113 - First protrusion;

[0037] 114 - Second groove; 1141 - Vertical groove; 1142 - Circumferential groove; 1143 - First spiral groove; 1144 - Second spiral groove;

[0038] 115 - Second protrusion;

[0039] 116 - Lock opening; 1161 - Fixing hole; 1162 - Outer edge of lock opening;

[0040] 117 - Outer edge of the retaining wall; 118 - Inner edge of the retaining wall;

[0041] 120 - Hole-type foundation; 130 - Expanded diameter section of hole-type foundation. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0043] Transmission towers are structures used to support transmission lines in the field of overhead transmission lines, and are generally made of steel or reinforced concrete.

[0044] In the construction of power transmission line projects, bored foundations are an important structural form for supporting towers. They are usually formed by excavating in the soil / rock by machinery or manual labor, and the steel frame and concrete are directly poured into the excavated holes to form the foundation.

[0045] Currently, common types of bored foundations used in power transmission lines include excavated foundations, bored pile foundations, and rock-embedded foundations.

[0046] During the excavation and shaping of bored foundations, retaining walls are typically used for support to protect the borehole walls and prevent collapse. Currently, the power industry mainly uses three types of retaining walls: cast-in-place concrete retaining walls, mud retaining walls, and steel casing retaining walls.

[0047] During the excavation of foundation pits, the borehole walls may collapse due to unstable soil. The role of the retaining wall is to support the borehole walls and prevent this from happening. The retaining wall ensures that construction workers are not injured by the collapse of the borehole walls during excavation. Secondly, it ensures the quality of the project by maintaining the shape and size of the borehole, making subsequent foundation construction smoother. In addition, the retaining wall may also prevent groundwater seepage, keeping the borehole dry and avoiding construction interruptions or increased difficulties.

[0048] Currently, cast-in-place concrete retaining walls are commonly used to ensure construction safety. The construction of cast-in-place concrete retaining walls primarily involves pouring concrete directly into the site, typically using a segmented construction method. This means first excavating a hole to a certain depth, then erecting formwork around the hole walls and pouring concrete retaining walls. Once the retaining walls have reached a certain strength, excavation continues downwards, repeating this process until the designed depth is reached.

[0049] This construction method is effective; however, it still has obvious limitations in practical applications.

[0050] For example, from the perspective of construction efficiency, this process requires repeated excavation, formwork, pouring, curing, and formwork removal. Each cycle requires waiting for the concrete to reach sufficient strength before construction can continue, and usually requires 24 to 48 hours of curing time, which significantly prolongs the overall construction cycle.

[0051] Furthermore, the formwork system requires multiple disassembly and reassembly cycles, which not only increases labor costs but also makes the formwork prone to deformation and damage due to repeated handling. More importantly, the joints formed by segmented construction often have problems with loose concrete bonding, becoming weak points in the structure and affecting overall stability and durability.

[0052] In addition, the repeated use of large quantities of formwork and steel reinforcement materials not only wastes resources but also keeps construction costs high.

[0053] Furthermore, the construction method of cast-in-place concrete retaining wall technology still relies mainly on traditional manual operation, with a low degree of mechanization, making it difficult to meet the requirements of modern engineering construction for construction efficiency, quality control, and cost optimization. This limitation is particularly pronounced in transmission line projects with tight schedules and complex construction conditions.

[0054] Therefore, this application proposes a prefabricated retaining wall concrete component. This retaining wall concrete component is the prefabricated retaining wall of this application. The prefabricated retaining wall needs to be prefabricated in sections and pieces in the factory and then transported to the construction site. After the excavated foundation is formed, workers can assemble the retaining wall inside the hole to quickly form the retaining wall of the excavated foundation, thereby meeting the construction requirements.

[0055] The use of prefabricated retaining walls in this application solves the objective problems of long construction cycles, complex construction processes, and high construction technology requirements associated with cast-in-place retaining walls. Furthermore, the prefabricated retaining walls manufactured in this factory can be processed in batches and in a standardized manner according to commonly used pile diameters, eliminating the need for layout processing each time and minimizing the cycle time and difficulty of the processing.

[0056] Furthermore, based on standardized prefabricated retaining walls, personnel can refer to standardized design and construction drawings. During the design and construction process, they can directly select retaining walls of appropriate size according to their needs, maximizing design and construction efficiency and facilitating manufacturing.

[0057] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0058] The prefabricated retaining wall 100 for borehole foundations of transmission lines provided in this application may include at least one retaining wall section 110. This prefabricated retaining wall 100 can be as follows: Figure 1As shown. The installation of this retaining wall 110 allows for the direct installation of a pre-formed concrete retaining wall inside the hole during the excavation process, thereby achieving rapid protection of the hole and avoiding delays in construction due to waiting for the cast-in-place concrete to reach the required strength.

[0059] In one example, the number of sections of the retaining wall 110 in the prefabricated retaining wall 100 can be determined based on the depth of the excavated foundation.

[0060] In one example, a worker will install a section of retaining wall 110 inside the hole when the hole is dug to a depth of one section of retaining wall 110.

[0061] In this example, the method of installing the retaining wall 110 section by section according to the worker's excavation depth can further ensure the stability of the hole wall during the excavation process and avoid abnormalities such as collapse during the excavation of the hole-type foundation.

[0062] For example, the retaining wall 110 is composed of a plurality of retaining wall segments 111. For example, such as Figure 2 As shown, the protective wall 110 is a ring composed of four protective wall segments 111.

[0063] In one example, the cross-section of the retaining wall 110 can be, in addition to being, as shown below. Figure 2 The circular ring shown can also be a rectangle, polygon, or other geometric shapes. The shape can be determined based on the cross-sectional type of the foundation.

[0064] For example, the number of protective wall segments 111 that make up a protective wall 110 can be 2, 3, 4, 5, etc. The arrangement of these protective wall segments 111 ensures that when the protective wall 110 is fixed downwards, the lower protective wall 110 can reach the lower one through the hole in the upper protective wall 110.

[0065] Optionally, the number of the protective wall segments 111 can be determined according to the cross-sectional shape of the protective wall 110. Alternatively, the number of the protective wall segments 111 can be determined according to the size of the protective wall 110 to ensure convenient transportation and reduce transportation costs.

[0066] In one example, the first side of the protective wall segment 111 is provided with a third groove 1111, and the second side of the protective wall segment is provided with a fourth protrusion 1112. The third groove 1111 matches the fourth protrusion 1112. When multiple protective wall segments 111 are composed, the first side of one protective wall segment 111 is engaged with the second side of another protective wall segment 111.

[0067] For example, based on the matching third groove 1111 and fourth protrusion 1112, in two adjacent protective wall segments 111, the third groove 1111 on the first side of one protective wall segment 111 can engage with the fourth protrusion 1112 on the second side of the other protective wall segment 111. This engagement configuration can improve the accuracy of the combination of multiple protective wall segments 111 of the protective wall 110, thereby improving the structural stability of the protective wall 110.

[0068] In one example, multiple retaining wall segments are fixed together by an adhesive. The use of this adhesive can further improve the interlocking strength between two adjacent retaining wall segments 111, thereby further improving the structural stability of the retaining wall 110.

[0069] For example, the top surface of the protective wall 110 is provided with a first groove 112, and the bottom surface of the protective wall is provided with a first protrusion 113. The first protrusion 113 matches the first groove 112.

[0070] In one example, the first protrusion 113 and the first groove 112 are matched such that when the assembled guard wall 100 includes multiple guard walls 110, the first protrusion 113 on the bottom surface of the upper guard wall 110 is engaged with the first groove 112 on the top surface of the lower guard wall 110.

[0071] In this example, the first groove 112 and the first protrusion 113 are provided so that when there are multiple sections of protective wall 110, the first groove 112 and the first protrusion 113 can be used to achieve the fitting of two adjacent sections of protective wall 110, so as to avoid the protective wall being misaligned due to external force, thereby affecting the stability of the excavated foundation.

[0072] In one example, the first groove 112 can be as follows: Figure 2 As shown, an annular groove is provided on the top surface of the protective wall 110. On the top surface of the protective wall 110, the inner and outer sides of the first groove 112 can each be provided with a plane of a certain thickness. The first protrusion 113 can be as follows: Figure 3 As shown, an annular protrusion is provided on the bottom surface of the protective wall 110. On the bottom surface of the protective wall 110, the inner and outer sides of the first protrusion 113 can each be provided with a plane of a certain thickness.

[0073] Optionally, the thickness of the inner surface of the first groove 112 is the same as the thickness of the inner surface of the first protrusion 113. And the thickness of the outer surface of the first groove 112 is the same as the thickness of the outer surface of the first protrusion 113.

[0074] In this example, the arrangement of the annular first groove 112 and the first protrusion 113 can further ensure that the two sections of the protective wall 110 will not be moved in any direction after being fitted, thereby causing the two sections of the protective wall 110 to be misaligned.

[0075] In another example, the first groove 112 can be a plurality of grooves with a certain length and width distributed on the annular plane of the top surface of the protective wall 110. The first protrusion 113 can be a plurality of protrusions with a certain length and width distributed on the annular plane of the bottom surface of the protective wall 110.

[0076] Optionally, the corresponding first groove 112 and first protrusion 113 have the same length and width.

[0077] Alternatively, the multiple grooves can have the same length and width. Or, the different grooves can have different lengths and widths.

[0078] For example, the arrangement of multiple grooves and multiple protrusions of the first groove 112 and the first protrusion 113 can further ensure the angular consistency of the upper and lower protective walls 110 when they are fitted together, and thus when the second groove 114 is provided on the outer surface of the protective wall 110, the second grooves of the two adjacent protective walls 110 are connected.

[0079] In this example, the first protrusion 113 on the bottom surface of the upper protective wall 110 and the first groove 112 on the top surface of the lower protective wall 110 can be fitted together to facilitate the splicing and positioning of the two protective walls 110.

[0080] In one example, after the upper and lower protective walls 110 are fitted together, the connection strength and contact area can be increased by injecting adhesive or anchoring agent, thereby improving the reliability of the upper and lower protective walls 110 at the fitting point.

[0081] In one example, the outer surface of the retaining wall 110 is provided with multiple evenly distributed second grooves 114. The second grooves 114 are used to improve the grouting efficiency on the outer side of the retaining wall 110, and the retaining wall 110 can achieve a tighter bond with the original soil of the pit wall through grouting.

[0082] Optionally, to further improve grouting efficiency, the second groove should connect the top and bottom surfaces of the retaining wall 110. For example, viewed from the top and bottom surfaces of the retaining wall 110, the second groove 114 can be as follows: Figure 2 and Figure 3 As shown.

[0083] Optionally, the number of second grooves 114 on the outer surface of the protective wall 110 can be determined according to actual needs. For example, it can be 4, 8, 10, etc.

[0084] Optionally, the plurality of second grooves 114 are evenly distributed on the outer surface of the protective wall 110. For example, as Figure 2 and Figure 3 As shown, when the number of the second grooves 114 is 8, the included angle between any two second grooves 114 can be 45 degrees.

[0085] In one example, the second groove 114 includes a vertical groove 1141. The arrangement of this vertical groove 1141 can improve the efficiency of grout filling around the pile.

[0086] In another example, the second groove 114 includes a first spiral groove 1143. The first spiral groove 1143 can increase the contact area between the grout and the original soil hole wall, thereby further improving the tightness of the connection between the retaining wall 110 and the original soil hole wall, and improving the connection stability between multiple retaining walls 110, thereby forming an integral excavation retaining wall.

[0087] In one example, when the second groove 114 includes a vertical groove 1141, the second groove 114 may also include an circumferential groove 1142. The circumferential groove 1142 and the vertical groove 1141 are interlaced to form a mesh structure. For example, the structure of the interlaced circumferential groove 1142 and vertical groove 1141 on the outer surface of the protective wall 110 can be as follows: Figure 4 As shown. The addition of the circumferential groove 1142 can further improve the contact between the grout and the retaining wall 110 and the original soil hole wall during the grouting process, thereby further improving the tightness of the bond between the retaining wall 110 and the original soil hole wall.

[0088] In one example, when the second groove 114 includes the first spiral groove 1143, the second groove 114 may also include a second spiral groove 1144. The first spiral groove 1143 and the second spiral groove 1144 have opposite inclination angles. For example, the first spiral groove 1143 may be inclined at a 45-degree angle to the left, and the second spiral groove 1144 may be inclined at a 45-degree angle to the right. The first spiral groove 1143 and the second spiral groove 1144 are interwoven to form a mesh structure. The formation of this mesh structure can further improve the contact between the grout and the retaining wall 110 and the original soil hole wall during the grouting process, thereby further improving the tightness of the bond between the retaining wall 110 and the original soil hole wall.

[0089] In one example, when multiple retaining walls 110 are included, if the first protrusion 113 on the bottom surface of the upper retaining wall 110 engages with the first groove 112 on the top surface of the lower retaining wall 110, then the second groove 114 of the upper retaining wall 110 connects with the second groove 110 of the lower retaining wall 110. This connection of the second grooves 114 of two adjacent retaining walls 110 can further increase the flow rate of the grout during the grouting process, thereby improving grouting efficiency.

[0090] In one example, the grouting method can be pressure grouting, thereby achieving the effect of grouting around the outer perimeter of the retaining wall, further improving the contact between the grout and the original soil hole wall, and thus improving the stability of the excavated foundation.

[0091] In one example, the inner and / or outer surfaces of the retaining wall 110 are provided with a plurality of second protrusions 115. The provision of the second protrusions 115 can improve the bonding strength between the grout and the retaining wall when the retaining wall 110 is grouted.

[0092] For example, the distribution of the second protrusion 115 on the inner surface of the retaining wall 110 can be as follows: Figure 5 As shown.

[0093] Optionally, the shape of the second protrusion 115 can be a geometric shape. For example, it can be a triangle, rectangle, pentagon, hexagon, rhombus, circle, ellipse, etc.

[0094] Optionally, the size, height, and distribution density of the second protrusion 115 can be set according to the target bonding strength. For example, the greater the required target bonding strength, the larger, taller, and more densely distributed the second protrusion 115 will be.

[0095] Optionally, when the second protrusion 115 is disposed on the outer surface of the retaining wall 110, the second protrusion 115 is disposed in an area other than where the second groove 114 is located. The second protrusion 115 disposed on the outer surface of the retaining wall 110 can work together with the second groove 114 to improve the tightness of the fit between the retaining wall 110 and the original soil hole wall after grouting.

[0096] In this example, the second protrusion 115 on the inner surface of the retaining wall 110, the second protrusion 115 on the outer surface, and the second groove 114 on the outer surface are used to achieve a tight fit between the pile itself, the retaining wall 110, and the original soil hole wall, thereby maximizing the effect of pile side friction resistance and solving the problem that the current prefabricated retaining wall and the original soil cannot become a whole, which affects the vertical bearing capacity of the pile foundation.

[0097] In one example, when the protective wall 110 is placed at the top, it is the first protective wall section. A locking slot 116 may also be provided on the outer surface of the protective wall 110 near the top. The locking slot 116 can be provided as follows: Figure 6 As shown, since the top of the first section of the retaining wall 110 is usually higher than the ground, a locking lug 116 can be installed near the top of the first section of the retaining wall 110 to prevent it from shifting downwards during excavation and to prevent debris from falling into the hole. This locking lug 116 can be located above the ground, ensuring that the first section of the retaining wall 110 will not shift downwards after being tightly fitted to the ground, thereby improving the safety of the retaining wall 110 during excavation.

[0098] For example, the lock slot 116 is an annular disc. The lock slot 116 can be as follows: Figure 7 As shown. The inner edge of the lock opening 116 coincides with the outer edge 117 of the protective wall 110. The outer edge 1162 of the lock opening 116 is as follows. Figure 7 As shown.

[0099] In one example, multiple fixing holes 1161 are evenly distributed on the lock 116.

[0100] Optionally, the number of fixing holes 1161 can be set as needed. For example, the number of fixing holes 1161 can be 4, 6, 8, etc.

[0101] Optionally, the plurality of fixing holes 1161 are evenly distributed on the annular disc of the lock opening 116.

[0102] Alternatively, workers can further improve the ground stability of the first section of retaining wall 110 by inserting an anchor into the fixing hole 1161, and by having the anchor pass through the fixing hole and be anchored into the soil layer at the pit opening.

[0103] Alternatively, the anchor can be a steel pipe or an anchor bolt.

[0104] Optionally, the anchoring depth can be determined based on the actual soil type. After construction is completed, the anchor can be removed, and the resulting hole can be filled with grout or crushed stone.

[0105] In this example, the locking opening 116 ensures that the retaining wall is raised above the existing ground level, effectively preventing debris, soil, and rainwater from entering the pit and posing a threat to the safety of workers below, while reducing the disturbance of external elements to the already excavated pit. Furthermore, the fixing hole 1161 ensures that the prefabricated retaining wall remains secure even when the soil at the pit opening is of poor quality.

[0106] In one example, when the protective wall 110 is positioned at the bottommost section, it is a tail section protective wall. The bottom of this tail section protective wall 110 is flat. This tail section protective wall 110 can be as follows: Figure 8 As shown.

[0107] In one example, reinforcing bars may be embedded inside the retaining wall. The presence of these reinforcing bars allows the entire component to withstand a certain level of strength and deformation.

[0108] In one example, the retaining wall 110 is made of lightweight, high-strength lightweight aggregate concrete. The use of this material reduces the difficulty of transportation. This transportation includes transport from the factory to the construction material station, and from the material station to the site tower location.

[0109] In one example, the use of multiple retaining walls in a hole-punch class base can be as follows: Figure 9 As shown. The shaded area along the upper diagonal represents the ground. The locking slot 116 is located above the ground. The retaining wall 110 with the locking slot is the first retaining wall section. Multiple retaining wall sections 110 are subsequently provided. The last retaining wall section 110 is the tail retaining wall section.

[0110] Below the tail section retaining wall 110, there is also a certain type of bored foundation 120. The bored foundation 120 below the tail section retaining wall 110 is a bored foundation for the rock section.

[0111] For example, the first retaining wall, multiple intermediate retaining walls, and the last retaining wall are arranged in series. The number of retaining walls can be selected differently according to the geological conditions at the tower leg.

[0112] Optionally, the height of each retaining wall section can be adjusted according to actual needs.

[0113] Among them, the excavated foundation 120 with the retaining wall 110 area is an excavated foundation 120 with soil layer.

[0114] Optionally, an enlarged diameter section 130 may be provided below the pre-drilled foundation 120. This section increases the contact area with the ground at the bottom of the pre-drilled foundation, thereby further improving the stability of the pre-drilled foundation.

[0115] In one example, the retaining wall 110 can be used for the construction of bored foundations for power transmission lines. These bored foundations can be located in terrains such as flat land, hills, and mountains. The retaining wall 110 helps prevent the collapse of the surface soil layer.

[0116] In one implementation, the retaining wall 110 can be used in scenarios involving cast-in-place pile foundations on soft surface soil. Especially for sandy soils where machine vibration during mechanical drilling can easily cause soil collapse at the pit opening, the application of the retaining wall 110 can significantly improve the safety of bored foundations.

[0117] In one implementation, the retaining wall 110 is suitable for use in mountainous terrain where there is a soil layer of a certain thickness on the surface and a layer of moderately weathered rock underneath.

[0118] In this scenario, the commonly used foundation types for transmission lines are either excavated foundations or manually excavated hole foundations. These types of foundations are collectively referred to as hole foundations. Generally, because machinery cannot reach the tower location, manual excavation is used. However, as the hole depth increases, the surface soil layer is prone to collapse, posing a significant threat to the safety of personnel carrying out the hole-drilling work.

[0119] Furthermore, the construction method of cast-in-place retaining wall will significantly increase the construction period. The series of necessary operations such as concrete preparation, transportation, formwork, and curing will lead to a significant increase in the construction period of retaining wall for bored foundations.

[0120] Therefore, considering the shortcomings of cast-in-place retaining walls and the safety of workers, the prefabricated assembled retaining wall 110 used in this application can effectively solve the above problems and achieve a series of advantages such as short construction period, low construction risk, high design, processing and construction efficiency, outstanding economy and high safety.

[0121] Finally, it should be noted that other embodiments of this utility model will readily conceive of by those skilled in the art upon considering the utility model disclosed in the specification. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A fabricated retaining wall for a foundation of the bored type for a power transmission line, characterized in that, include: At least one retaining wall section; The protective wall is composed of multiple protective wall segments; The top surface of the protective wall is provided with a first groove, and the bottom surface of the protective wall is provided with a first protrusion; The first protrusion matches the first groove.

2. A wall protection according to claim 1, characterized in that The first side of the protective wall segment is provided with a third groove, and the second side of the protective wall segment is provided with a fourth protrusion; the third groove matches the fourth protrusion; When multiple protective wall segments are combined, the first side of one protective wall segment is fitted with the second side of another protective wall segment.

3. A wall protection according to claim 2, characterized in that The plurality of wall-protecting panels are fixed together by adhesive.

4. The wall protection of claim 1, wherein, The outer surface of the protective wall is provided with multiple evenly distributed second grooves.

5. The wall protection of claim 4, wherein, The second groove includes a vertical groove, or a first spiral groove.

6. The wall protection of claim 5, wherein, When the second groove includes a vertical groove, the second groove also includes a circumferential groove; the circumferential groove and the vertical groove intersect to form a mesh structure.

7. The wall protector of claim 5, wherein, When the second groove includes the first spiral groove, the second groove also includes the second spiral groove; the first spiral groove and the second spiral groove have opposite inclination angles; the first spiral groove and the second spiral groove are interlaced to form a mesh structure.

8. The wall protector of claim 4, wherein, When multiple protective walls are included, if the first protrusion on the bottom surface of the upper protective wall engages with the first groove on the top surface of the lower protective wall, then the second groove of the upper protective wall connects with the second groove of the lower protective wall.

9. The wall protection of any one of claims 1-8, wherein, The inner and / or outer surfaces of the protective wall are provided with a plurality of second protrusions.

10. The wall protection of any one of claims 1-8, wherein, When the protective wall is placed at the top, a locking opening is provided on the outer surface of the protective wall near the top; the locking opening is in the shape of a ring disc.

11. The wall protection of claim 10, wherein, The lock has multiple fixing holes evenly distributed on it.

12. The wall protection of any one of claims 1-8, wherein, When the protective wall is placed at the bottom, the bottom of the protective wall is a flat surface.

13. The wall protection of any one of claims 1-8, wherein, The retaining wall is reinforced with steel bars.

Images