Reinforcing structure and method for tower footing slope

Abstract

The tower footing side slope reinforcing structure comprises the steps that pile holes are formed in a side slope, and the depth of the pile holes reaches a bearing stratum of the side slope; arranging a rib column template in the pile hole, and arranging an embedded sleeve on the rib column template; anchor rods are arranged through the embedded sleeves to be connected with the rib column formworks; after a rib column is formed in the rib column formwork, the anchor rod is tensioned to reach preset stress, and the anchor rod is fixed; a reinforcement cage is arranged in the pile hole, and concrete is poured to form a foundation pile; a bearing platform formwork is arranged, the bearing platform formwork is connected with the top ends of the foundation piles, the pile holes and the rib columns, and a bearing platform is formed in the bearing platform formwork; and the tower is installed on the bearing platform. The rib columns, the anchor rods and the foundation piles are cooperatively matched, so that the bending resistance and the sliding resistance are improved, and lateral deformation of a soil body and a tower foundation is controlled and restrained. According to the construction method, construction only needs to be conducted within the tower footing range, additional slope excavation is not needed, and use of a large amount of concrete can be reduced; the anchor rods are not dependent on large machines during reinforcement, the construction range is small, and disturbance to other original slope environments is avoided.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, and in particular to a structure and method for reinforcing the slope of a tower foundation. Background Technology

[0002] Transmission tower structures are often built in complex terrains such as mountains and hills, with their foundations frequently located on steep slopes or slope crests. Foundation construction inevitably disturbs the original slope, reducing its stability. Without reinforcement measures, slope stability cannot be guaranteed, potentially leading to landslides and collapses, weakening or even destroying the tower foundation's bearing capacity, causing the tower to tilt, shift laterally, or collapse, resulting in significant economic losses and safety accidents. Therefore, effectively reinforcing tower foundations located on slopes to improve their overall stability and bearing capacity is crucial.

[0003] However, traditional slope reinforcement structures such as anti-slide piles and retaining walls cover a large area and require the use of large amounts of concrete and steel during construction, as well as the construction of large access roads, resulting in a large amount of construction waste. They have disadvantages such as complex construction, high cost, long construction period, poor adaptability, and impact on the ecological environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a structure and method for reinforcing the slope of a tower base, which can improve the horizontal and vertical bearing capacity of the foundation while reducing the difficulty of construction.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A method for reinforcing the slope of a tower base includes: Piling holes are formed on the slope, and the depth of the pile holes reaches the bearing layer of the slope; A rib column template is installed inside the pile hole, and a pre-embedded sleeve is installed on the rib column template; an anchor rod is installed through the pre-embedded sleeve and connected to the rib column template; after the rib column is formed inside the rib column template, the anchor rod is tensioned to reach a preset stress and then fixed. A reinforcing cage is installed inside the pile hole, and concrete is poured in to form a foundation pile; Set up a foundation template and connect the foundation template to the top of the foundation pile, pile hole and rib column to form a foundation within the foundation template; The tower is installed on the support platform.

[0006] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows: A tower foundation slope reinforcement structure, formed by the tower foundation slope reinforcement method described above, includes a foundation cap, ribs, anchor bolts, and foundation piles; the foundation piles are installed in pile holes in the slope, and the bottom of the foundation piles reaches the bearing layer of the slope; the ribs are installed on the inner wall of the pile holes and embedded in the foundation piles; one end of the anchor bolt is connected to the rib, and the other end is installed in the slope soil layer, and the inclination angle of the anchor bolt matches the slip surface of the slope; the foundation cap is installed at the top of the pile holes, and the foundation cap is connected to the top of the ribs and the top of the foundation piles; the side of the foundation cap away from the pile holes is used to install the tower.

[0007] The beneficial effects of this invention are as follows: By forming rib columns and foundation piles within the pile holes after forming pile holes on the slope, and by installing anchor rods on the rib columns and tensioning them to form prestressed anchor rods, the rib columns, anchor rods, and foundation piles work together to improve bending and sliding resistance, and control and constrain the lateral deformation of the soil and tower foundation. Simultaneously, the construction method only requires construction within the tower base area, eliminating the need for additional slope excavation, making the reinforcement more targeted and reducing the use of large amounts of concrete; anchor rod reinforcement does not rely on large machinery, has a small construction area, thereby reducing the amount of work and avoiding disturbance to the remaining original slope environment. Attached Figure Description

[0008] Figure 1 This is a flowchart illustrating the steps of a tower base slope reinforcement method according to an embodiment of the present invention; Figure 2 This is a schematic diagram of pile hole formation in a method for reinforcing a tower base slope according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the formation of the enlarged hole section in a method for reinforcing a tower base slope according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the ribs and anchor bolts of a tower base slope reinforcement method according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the pre-forming of foundation piles in a method for reinforcing the slope of a tower base according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the overall structure of the tower base formed by the tower base slope reinforcement method in an embodiment of the present invention. Figure 7 This is a schematic diagram of the overall tower structure formed by the tower base slope reinforcement method in an embodiment of the present invention; Figure 8 This is a top view of the overall tower base structure formed by the tower base slope reinforcement method in an embodiment of the present invention; Label Explanation: 1. Foundation cap; 2. Rib column; 3. Anchor bolt; 4. Foundation pile; 41. Upper pile; 42. Lower pile; 5. Reinforcing cage; 100. Slope soil layer; 110. Pile hole; 111. Shallow soil layer; 112. Bearing layer; 200. Pole tower. Detailed Implementation

[0009] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0010] A method for reinforcing the slope of a tower base includes: Piling holes are formed on the slope, and the depth of the pile holes reaches the bearing layer of the slope; A rib column template is installed inside the pile hole, and a pre-embedded sleeve is installed on the rib column template; an anchor rod is installed through the pre-embedded sleeve and connected to the rib column template; after the rib column is formed inside the rib column template, the anchor rod is tensioned to reach a preset stress and then fixed. A reinforcing cage is installed inside the pile hole, and concrete is poured in to form a foundation pile; Set up a foundation template and connect the foundation template to the top of the foundation pile, pile hole and rib column to form a foundation within the foundation template; The tower is installed on the support platform.

[0011] As described above, the beneficial effects of this invention are as follows: by forming ribs and foundation piles within pile holes after forming pile holes on the slope, and by installing anchor rods on the ribs and tensioning them to form prestressed anchor rods, the ribs, anchor rods, and foundation piles work together to improve bending and sliding resistance, and control and constrain the lateral deformation of the soil and tower foundation. Simultaneously, the construction method only requires construction within the tower base area, eliminating the need for additional slope excavation, making the reinforcement more targeted and reducing the use of large amounts of concrete; anchor rod reinforcement does not rely on large machinery, has a small construction area, thereby reducing the workload and avoiding disturbance to the remaining original slope environment.

[0012] Furthermore, the process of forming pile holes on the slope includes: The upper part of the pile hole is enlarged to form an enlarged section; The rib template is placed inside the enlarged section.

[0013] As described above, by enlarging the upper part of the pile hole to form an enlarged section, a stepped pile can be formed when the pile hole is used to form the foundation pile. The stepped pile, in combination with the prestressed anchor rod, improves the overall stability of the slope and the horizontal bearing capacity of the tower foundation.

[0014] Furthermore, the step of setting the rib template within the enlarged section includes: Ribbed steel bars are tied within the enlarged hole section; The rib column formwork is supported on the outside of the rib column reinforcement; The ribs are formed by pouring concrete into the rib template.

[0015] As described above, by binding rib column steel bars in the expanded section and supporting rib column formwork on the outside of the rib column steel bars, the strength of the rib column can be improved after the rib column is formed by pouring through the rib column formwork.

[0016] Furthermore, it also includes: The ribbed steel bars are provided with reserved sections; Connect the steel cage to the reserved section of the rib column steel reinforcement.

[0017] As can be seen from the above description, by connecting the reserved sections of the reinforcing cage and the reinforcing bars of the rib column, the synergistic effect between the foundation pile and the rib column structure is improved, so that the foundation pile can be both a foundation load-bearing component and a slope support structure, thus reducing the construction procedures.

[0018] Furthermore, the setting of the pier template includes: Tie the foundation reinforcement bars and connect the foundation reinforcement bars to the reinforcement cage and the rib column reinforcement bars; The foundation formwork is erected on the foundation reinforcement.

[0019] As can be seen from the above description, by setting the foundation reinforcement, the foundation reinforcement is connected to the reinforcement cage and the rib column reinforcement, which enhances the connection strength between the foundation, the foundation pile and the rib column.

[0020] Furthermore, it also includes: Before tensioning the anchor bolt, the anchor bolt is supported by a bracket.

[0021] As described above, by supporting the anchor rod with a bracket before tensioning the anchor rod, the anchor rod is prevented from sagging and deforming under its own weight.

[0022] Furthermore, the tensioning of the anchor rod to reach the preset stress includes: All the anchor rods on the rib column are tensioned using an overall tensioning method.

[0023] As described above, all anchor bolts on the rib column are tensioned using an overall tensioning method to ensure uniform stress distribution across the multiple anchor bolts. Furthermore, compensation tensioning can be performed after a period of time following the initial tensioning to compensate for any prestress loss.

[0024] Further, fixing the anchor bolt includes: Full-length pressurized grouting is performed on the pre-embedded sleeve within the free section of the anchor bolt; The anchor head portion of the anchor rod is sealed by pouring concrete.

[0025] As described above, by pressurized grouting and concrete pouring to seal the anchor rods, the anchor rods can disperse the stress of the ribs and prevent the pile foundation from cracking.

[0026] Further, the poured concrete includes: Concrete with a strength grade greater than the preset value was used for pouring.

[0027] As described above, concrete with a strength grade greater than the preset strength grade is used for pouring, such as concrete with a strength grade greater than C25, to ensure the strength of the concrete structure.

[0028] A tower foundation slope reinforcement structure, formed by the tower foundation slope reinforcement method described above, includes a foundation cap, ribs, anchor bolts, and foundation piles; the foundation piles are installed in pile holes in the slope, and the bottom of the foundation piles reaches the bearing layer of the slope; the ribs are installed on the inner wall of the pile holes and embedded in the foundation piles; one end of the anchor bolt is connected to the rib, and the other end is installed in the slope soil layer, and the inclination angle of the anchor bolt matches the slip surface of the slope; the foundation cap is installed at the top of the pile holes, and the foundation cap is connected to the top of the ribs and the top of the foundation piles; the side of the foundation cap away from the pile holes is used to install the tower.

[0029] As described above, by forming ribs and foundation piles within the pile holes after the pile holes are created on the slope, and by installing anchor rods within the ribs and tensioning them to form prestressed anchor rods, the ribs, anchor rods, and foundation piles work together to form a synergistic force-bearing system of "pile bending resistance and anchor cable tension resistance," thereby improving the horizontal bearing capacity of the tower foundation. Furthermore, the inclination angle of the anchor rods matches the slip surface of the slope; compared to traditional anchor rods which are mostly passively stressed, the pre-tensioned anchor rods apply initial compressive stress to the pile body, which can offset the potential slip force of the slope in advance, significantly improving the critical bearing capacity.

[0030] The above-described structure and method for reinforcing the slope of a tower base are applicable to scenarios involving the installation of towers on slopes. The specific implementation methods described below illustrate this: Example 1 Please refer to Figure 1 A method for reinforcing the slope of a tower base, comprising: Raw material and tensioning equipment preparation: This includes concrete materials used to form the foundation piles 4, rib columns 2, and pile caps 1. For example, in this embodiment, concrete with a strength grade greater than C25 is used. HRB400 steel bars are used for the reinforcing bars; the tension members used for the anchor bolts 3 (cables) are high-strength, low-relaxation steel strands with a strength grade not lower than 1860MPa; HVM type anchors matching the specifications of the steel strands are selected; pure cement grout is used; and a through-type tensioning jack is used for the tensioning equipment, employing an integral tensioning method. Construction preparation: This includes surveying and setting out, site leveling, equipment arrival, and determining the pile positions of the 200mm foundation piles 4 and the upper piles 41 of the tower.

[0031] Construction of S1, pile hole 110 and the upper enlarged section: (as follows) Figure 2 As shown, pile holes 110 are formed on the slope, and the depth of the pile holes 110 reaches the bearing layer 112 of the slope; wherein, the slope soil layer 100 includes a shallow soil layer 111 and a bearing layer 112, and the pile holes 110 penetrate the shallow soil layer 111 to reach the bearing layer 112. Figure 3 As shown, the upper part of the pile hole 110 is enlarged to form an enlarged section. The pile hole 110 can be formed by mechanical drilling, ensuring penetration into the bearing stratum 112; the upper enlarged section can be formed by manual excavation. The radius of the upper enlarged section exceeds the radius of the lower standard section by 200-500 mm, and the pile diameter of the pile hole 110 is approximately 1.0m-2.0m.

[0032] S2, Rib 2 construction and prestressed anchor bolt 3 installation: (as follows) Figure 4 As shown, a rib column 2 template is set inside the pile hole 110, and a pre-embedded sleeve is set on the rib column 2 template; an anchor rod 3 is set through the pre-embedded sleeve and connected to the rib column 2 template; after the rib column 2 is formed inside the rib column 2 template, the anchor rod 3 is tensioned to reach the preset stress and the anchor rod 3 is fixed.

[0033] Specifically, when setting the rib column 2 template within the enlarged borehole section: rib column 2 reinforcing bars are tied within the enlarged borehole section, and reinforcing bars connected to the foundation pile 4 reinforcing cage 5 are reserved as a pre-reserved section. The rib column 2 template is supported on the outside of the rib column 2 reinforcing bars, and sleeves are pre-embedded on the template at the locations where anchor rods 3 pass through. Concrete with a strength grade greater than C25 is poured into the rib column 2 template and cured to form the rib column 2, i.e., the rib column 2 is cast within the upper enlarged borehole section.

[0034] The construction of prestressed anchor bolts 3 is carried out simultaneously, including anchor hole drilling, anchor bolt 3 fabrication and installation, grouting, etc. The ends of anchor bolts 3 are locked to rib columns 2 through anchor heads. Steel strands / reinforcing bars are selected as the rod body. The spacing and length of anchor bolts 3 are determined according to the specific strata. Anchor bolts 3 are rigidly connected to rib columns 2 and foundation piles 4, forming a pile-rib-anchor integrated load-bearing frame. A centering bracket is set during anchor bolt 3 fabrication to support the anchor bolts 3. After the concrete strength of rib columns 2 reaches the design strength, the anchor bolts 3 are tensioned. Tensioning is performed on all anchor bolts 3 on rib columns 2 using an integral tensioning method to ensure uniform stress on multiple steel strands. To compensate for prestress loss, compensatory tensioning can be performed after a period of time following the initial tensioning. After tensioning, the pre-embedded sleeves within the free section of anchor bolt 3 are pressurized and grouted along their entire length. Finally, the outer anchor head of anchor bolt 3 is encased in concrete and sealed for protection.

[0035] Construction of S3, foundation pile 4, and the upper enlarged section: (e.g., ...) Figure 5 As shown, a reinforcing cage 5 is installed in the pile hole 110, and concrete is poured to form a foundation pile 4. When tying the reinforcing cage 5, the reinforcing cage 5 is connected to the reserved section of the reinforcing bars of the rib column 2, and it is ensured that the reinforcing bars of the enlarged hole section are firmly connected to the reinforcing bars of the lower standard foundation pile 4. Subsequently, concrete with a strength grade greater than C25 is continuously poured and cured to form a stepped foundation pile 4, which can enhance the bearing capacity of the tower foundation and specifically enhance the bending section, such as... Figure 6 As shown.

[0036] The pile diameter was specifically enlarged at the upper part of pile 4 (near the slope side) to form a localized reinforced zone, directly resisting horizontal thrust. This non-integral diameter enlargement method saved materials. The addition of rib column 2 structure converted the tensile force of anchor rod 3 into compressive stress in the pile body, suppressing crack development in the enlarged section. The structure forms a pile-rib-anchor integrated load-bearing frame. By enlarging the diameter of pile 41 at the upper part of pile 4, setting rib column 2, and using prestressed anchor rod 3, the synergistic effect of the three is fully utilized, forming a synergistic load-bearing system of "pile body bending resistance + anchor cable tensile resistance." This achieves the goal of improving the horizontal bearing capacity of the 200mm tower foundation while stabilizing the slope, solving the problems of high cost, limited effectiveness, and lack of specificity of traditional methods under complex conditions. In contrast, related technologies typically directly connect anchor rod 3 to anti-slide piles or retaining walls, without involving the rib column 2 structure, and do not form an integrated "pile-rib-anchor" frame.

[0037] S4, Construction of Pier 1: (as follows) Figure 6As shown, a foundation 1 template is set up, and the foundation 1 template is connected to the top of the foundation pile 4, the pile hole 110 and the rib column 2 to form the foundation 1 within the foundation 1 template. Specifically: the reinforcement of the foundation 1 is tied, and the reinforcement of the foundation 1 is connected to the reinforcement cage 5 and the reinforcement of the rib column 2, such as by welding; the foundation 1 template is erected on the reinforcement of the foundation 1, and concrete with a strength grade greater than C25 is used to integrally cast and cure the foundation 1 template to form the foundation 1.

[0038] S5. Install the tower 200 on the support platform 1. Figure 7 As shown, the installation of tower 200 is complete.

[0039] Meanwhile, to ensure the safety and reliability of the tower base during long-term use, this embodiment also includes a system for monitoring the post-deformation and internal forces of the 200 tower base, which can be dynamically adjusted based on the monitoring results. Specifically: (1) For stress monitoring of pile 4: fiber optic grating sensors or resistance strain gauges are pre-embedded at the key sections of the upper pile 41 and lower pile 42 of pile 4 to monitor the stress distribution of pile 4 in real time and calculate the changes in bending moment and axial force.

[0040] (2) For stress monitoring of anchor bolt 3: A fully digital anchor cable with multiple load-bearing bodies in one anchor hole is adopted. The anchor cable stress is monitored in real time and the change curve is viewed through the internal and external digital anchors. The location of the slip surface can be determined by the measured changes in the force values ​​of the internal and external digital anchors. In addition, a load sensor is installed at the anchor head of anchor bolt 3 to monitor the prestress loss or change.

[0041] (3) For slope displacement monitoring: Inclinometers, GNSS (Global Navigation Satellite System) displacement monitoring points or inclinometer tubes are installed on the slope surface and pile top to monitor the overall and local deformation of the slope.

[0042] (4) For environmental factor monitoring: set up rain gauges and groundwater level monitoring wells to record rainfall and groundwater level changes, providing a data basis for data analysis.

[0043] The data acquisition and transmission are carried out in the following way: an automated data acquisition system is used to collect data from each sensor periodically, such as hourly or daily. The data is then sent to the central data processing platform through wireless transmission modules such as 4G / 5G and LoRa. The platform performs functions such as data storage, visualization, data analysis, and early warning.

[0044] Warning threshold setting: Based on design calculations and specifications, warning values ​​and safety thresholds are set for parameters such as pile bending moment, anchor bolt prestress, and slope displacement, including: 1. Calculation of horizontal bearing capacity provided in the pile-rib-anchor co-load model When the pile reinforcement ratio is less than 0.65%: ; When the pile reinforcement ratio is not less than 0.65%: ; in: Total horizontal load-bearing capacity (kN) provided to the system; The horizontal bearing capacity (kN) provided for the bored pile. The horizontal bearing capacity (kN) provided for prestressed anchors (cables); The horizontal deformation coefficient of the pile; This refers to the plasticity coefficient of the pile section modulus. This refers to the design value of the tensile strength of the pile concrete. The side is the section modulus of the tension edge of the pile's equivalent cross-section; This is the maximum bending moment coefficient of the pile body; Calculate the cross-sectional area of ​​the pile body; The vertical force influence coefficient at the pile top is taken as 0.5 for vertical compressive force and 1.0 for vertical tensile force. The vertical force (kN) at the top of the pile under the standard combination of load effects. For the bending stiffness of the pile body; This is a reduction factor, with a value ranging from 0.5 to 1; Design pull-out resistance (kN) provided for a single anchor bolt. The angle (°) between the anchor rod and the horizontal plane; The correlation coefficient for horizontal displacement is obtained by looking up a table.

[0045] 2. Calculation of total anti-sliding force provided in the pile-rib-anchor cooperative force model ; in: Total anti-skid force (kN) provided to the system; The anti-sliding force (kN) provided by the variable cross-section pile itself; The anti-slip force (kN) provided for prestressed anchors (cables); The shear bearing capacity of the pile (kN); The angle (°) of the sliding surface at the location of the pile. Design value of axial tensile strength of concrete (kN / m) 2 ); The radius of the pile (m); Design value of tensile strength of stirrups (kN / m) 2 ); The total cross-sectional area (m²) of each leg of the stirrups arranged in the same cross-section2 ); The spacing of the stirrups along the direction of the pile (mm); Calculate the slope angle (°) of the i-th block.

[0046] 3. Calculation of overall slope stability ; in: The overall stability safety factor of the slope; The total anti-skid force of the sliding body (kN); The total sliding force of the sliding body (kN); The anti-skid force (kN) is caused by the weight of the skid. This represents the sliding force (kN) caused by the weight of the sliding body. The above calculation method can also be used to determine the dimensions of various structures in the tower base.

[0047] Feedback and adjustment process: When the monitoring data approaches or exceeds the warning value, the system will automatically issue a warning; technicians can remotely analyze the data through the platform to determine whether adjustments are needed; if necessary, anchor rod 3 can be tensioned again to restore the designed prestress level; if the slope displacement continues to increase, it is advisable to add auxiliary anchor rod 3 or perform local grouting reinforcement.

[0048] Long-term performance assessment: Regular monitoring reports are issued to assess the long-term performance of the hardening system, providing a basis for operation and maintenance decisions. Through operational monitoring combined with dynamic adjustments, an upgrade from "static hardening" to "dynamic controllability" is achieved, enhancing project safety redundancy. Data-driven decision-making avoids blind hardening, saving later maintenance costs; and enhances the adaptability and reliability of the technology under complex geological and climatic conditions.

[0049] Example 2 Please refer to Figure 7 and Figure 8 A tower foundation slope reinforcement structure, formed by a tower foundation slope reinforcement method as described in Embodiment 1, includes a foundation 1, ribs 2, anchors 3, and foundation piles 4; the foundation piles 4 are disposed in pile holes 110 of the slope, and the bottom of the foundation piles 4 reaches the bearing layer 112 of the slope; the ribs 2 are disposed on the inner wall of the pile holes 110, and the ribs 2 are embedded in the foundation piles 4; one end of the anchors 3 is connected to the ribs 2, and the other end is disposed in the slope soil layer 100, and the inclination angle of the anchors 3 matches the slip surface of the slope; the foundation 1 is disposed at the top of the pile holes 110, and the foundation 1 is connected to the top of the ribs 2 and the top of the foundation piles 4; the side of the foundation 1 away from the pile holes 110 is used to install the tower 200.

[0050] The foundation pile 4 comprises an integrally formed upper pile 41 and a lower pile 42; the diameter of the upper pile 41 is larger than the diameter of the lower pile 42. In this embodiment, the diameter of the lower pile 42 is 1.0m-2.0m, and can be set to 1.0m, 1.2m, 1.5m, 2.0m, etc., depending on the size of the tower 200200; the difference between the radius of the upper pile 41 and the radius of the lower pile 42 is 200mm-100mm. For example, if the diameter of the upper pile 41 is 1.0m, then the diameter of the upper pile 41 can be 1.2m, 1.3m, or 1.4m, etc., so that the foundation pile 4 as a whole forms a stepped pile body, which can enhance the bearing capacity of the tower foundation and specifically enhance the bending resistance section. Compared to existing technologies where slope reinforcement often requires separate construction of retaining structures and foundation reinforcement (such as "anti-slide piles + independent anchor rods 3"), this embodiment uses an integrated design so that the foundation pile 4 serves as both a foundation load-bearing component and a slope support structure, thereby reducing construction procedures.

[0051] like Figure 7 As shown, in this embodiment, the rib column 2 is provided with at least two anchor rods 3. Different anchor rods 3 are sequentially arranged along the length direction of the rib column 2, that is, anchor rods 3 are sequentially arranged at different depths. All the anchor rods 3 on the rib column 2 are parallel to each other. The anchor rods 3 can be made of steel strand or steel bars as the rod body. The spacing and length of the anchor rods 3 are determined according to the specific stratum. The anchor rods 3 are rigidly connected to the rib column 2 and the foundation pile 4, forming a pile-rib-anchor integrated load-bearing frame. Meanwhile, as... Figure 8 As shown, the anchor rods 3 on different ribs 2 are staggered, and the anchor rods 3 are not placed in the middle position.

[0052] In summary, this invention provides a structure and method for reinforcing a tower foundation slope. By increasing the pile diameter within a certain range of the upper part of the foundation piles and adding prestressed anchor rods to the pile body, the overall stability of the slope is improved. Simultaneously, the horizontal bearing capacity of the tower foundation is increased, and the lateral deformation of the soil and tower foundation is controlled and restrained, thereby enhancing the horizontal bearing capacity of the tower foundation and the overall stability of the slope. Construction is only carried out within the tower foundation area, eliminating the need for additional slope excavation. The construction method of local hole enlargement + anchor rod reinforcement does not rely on large machinery, has a small construction area, and improves bending and sliding resistance by using stepped piles and anchor rods. Anchor rod grouting reinforces the rock mass, and rib columns disperse stress, preventing pile cracking. Therefore, reliable reinforcement can be implemented under complex terrain and adverse geological conditions. Because reinforcement is only carried out within the tower foundation area, further disturbance to the remaining original slope is avoided, making the reinforcement more targeted. This reduces the use of large amounts of concrete, shortens material transportation time, significantly reduces the workload, and substantially shortens the construction period. It also minimizes disturbance to the ecological environment.

[0053] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for reinforcing the slope of a tower base, characterized in that, include: Piling holes are formed on the slope, and the depth of the pile holes reaches the bearing layer of the slope; A ribbed column template is installed inside the pile hole, and a pre-embedded sleeve is installed on the ribbed column template; an anchor rod is installed through the pre-embedded sleeve and connected to the ribbed column template. After the ribs are formed in the rib template, the anchor rods are tensioned to the preset stress and then fixed. A reinforcing cage is installed inside the pile hole, and concrete is poured in to form a foundation pile; Set up a foundation template and connect the foundation template to the top of the foundation pile, pile hole and rib column to form a foundation within the foundation template; The tower is installed on the support platform.

2. The method for reinforcing the slope of a tower base according to claim 1, characterized in that, The formation of pile holes on the slope includes: The upper part of the pile hole is enlarged to form an enlarged section; The rib template is placed inside the enlarged section.

3. The method for reinforcing the slope of a tower base according to claim 2, characterized in that, The step of setting the rib template within the enlarged section includes: Ribbed steel bars are tied within the enlarged hole section; The rib column formwork is supported on the outside of the rib column reinforcement; The ribs are formed by pouring concrete into the rib template.

4. The method for reinforcing the slope of a tower base according to claim 3, characterized in that, Also includes: The ribbed steel bars are provided with reserved sections; Connect the steel cage to the reserved section of the rib column steel reinforcement.

5. The method for reinforcing the slope of a tower base according to claim 2, characterized in that, The setting of the pier template includes: Tie the foundation reinforcement bars and connect the foundation reinforcement bars to the reinforcement cage and the rib column reinforcement bars; The foundation formwork is erected on the foundation reinforcement.

6. The method for reinforcing the slope of a tower base according to claim 1, characterized in that, Also includes: Before tensioning the anchor bolt, the anchor bolt is supported by a bracket.

7. The method for reinforcing the slope of a tower base according to claim 1, characterized in that, The tensioning of the anchor rod to reach the preset stress includes: All the anchor rods on the rib column are tensioned using an overall tensioning method.

8. The method for reinforcing the slope of a tower base according to claim 1, characterized in that, The method of fixing the anchor bolt includes: Full-length pressurized grouting is performed on the pre-embedded sleeve within the free section of the anchor bolt; The anchor head portion of the anchor rod is sealed by pouring concrete.

9. A method for reinforcing the slope of a tower base according to claim 1, characterized in that, The poured concrete includes: Concrete with a strength grade greater than the preset value was used for pouring.

10. A tower base slope reinforcement structure, characterized in that, The method for strengthening the slope of a tower base as described in any one of claims 1-9 includes a pile cap, ribs, anchor bolts, and foundation piles. The foundation piles are installed in the pile holes of the slope, and the bottom of the foundation piles reaches the bearing layer of the slope; The rib is disposed on the inner wall of the pile hole and is embedded in the foundation pile; One end of the anchor rod is connected to the rib column, and the other end is set in the slope soil layer, and the inclination angle of the anchor rod matches the slip surface of the slope. The pile cap is disposed at the top of the pile hole, and the pile cap is connected to the top of the rib column and the top of the foundation pile; The side of the pier away from the pile hole is used to install the tower.

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