A goaf settlement area high-voltage line tower foundation reinforcing and strengthening structure

Abstract

The utility model belongs to the technical field of tower foundation reinforcement, specifically relates to a kind of high-voltage line tower foundation reinforcing and reinforcing structure in mined-out area subsidence zone, including original tower foundation, and original tower foundation bottom is provided with reinforced concrete reinforced pile cap, and reinforced pile cap bottom is provided with stress dispersion raft, and the outside of reinforced pile cap is provided with multiple groups adjustable support device, each adjustable support device includes oblique support pile anchored in stable soil body, and oblique support pile one end is hinged with hydraulic jack assembly, and hydraulic jack assembly is hinged with reinforced pile cap away from oblique support pile one end, and locking assembly is set on hydraulic jack assembly, this structure can effectively disperse the additional stress that tower foundation bears, actively adapt to the deformation of foundation, prevent the foundation cracking and damage caused by stress concentration, to greatly improve the long-term safety and stability of high-voltage iron tower in mined-out area subsidence zone.

Description

Technical Field

[0001] This utility model belongs to the field of tower foundation reinforcement technology, specifically relating to a reinforcement structure for high-voltage line tower foundations in mining subsidence areas. Background Technology

[0002] Many high-voltage transmission lines in my country inevitably pass through mining subsidence areas such as coal mines. With the mining of underground strata, the overlying rock layers move and are transmitted to the surface, causing large-scale surface subsidence, deformation, and even collapse. This uneven subsidence poses a serious threat to the stability of the high-voltage tower foundations, which may lead to tower foundation tilting, subsidence, or even overall instability, causing major safety accidents such as tower collapse and line breakage, and threatening the safe operation of the power grid.

[0003] Existing reinforcement technologies mostly focus on the foundation itself or underground treatment, lacking a "holistic" reinforcement scheme that works in conjunction with the superstructure and can actively adapt to and resist uneven ground settlement. Traditional rigid reinforcement structures are prone to stress concentration and failure when the foundation deforms.

[0004] To address this, we propose a reinforcement structure for high-voltage tower foundations in mining subsidence areas. This structure can effectively disperse the additional stress borne by the tower foundation, actively adapt to certain deformations of the foundation, and prevent foundation cracking and damage caused by stress concentration, thereby greatly improving the long-term safety and stability of high-voltage towers in mining subsidence areas. Utility Model Content

[0005] The purpose of this invention is to provide a reinforcement structure for high-voltage tower foundations in mining subsidence areas. This structure can effectively disperse the additional stress borne by the tower foundation, actively adapt to certain deformations of the foundation, and prevent foundation cracking and damage caused by stress concentration, thereby greatly improving the long-term safety and stability of high-voltage towers in mining subsidence areas.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A reinforcement structure for high-voltage power line tower base in a mining subsidence area includes the original tower base, a reinforced concrete reinforcement platform at the bottom of the original tower base, a stress diffusion raft plate at the bottom of the reinforcement platform, and multiple sets of adjustable support devices on the outside of the reinforcement platform.

[0008] Each adjustable support device includes an inclined support pile anchored in stable soil, with a hydraulic jack assembly hinged to one end of the inclined support pile, the end of the hydraulic jack assembly away from the inclined support pile being hinged to a reinforced foundation, and a locking component provided on the hydraulic jack assembly.

[0009] Furthermore, the inclined support piles are micropiles or steel pipe piles.

[0010] Furthermore, the hydraulic jack assembly includes a hydraulic cylinder hinged to one end of the inclined support pile. Inside the hydraulic cylinder is a piston, and on the piston is a push rod. One end of the push rod passes through the hydraulic cylinder and is fitted with a connecting plate. One side of the connecting plate is hinged to the reinforced bearing platform, and the push rod is provided with multiple locking holes.

[0011] Furthermore, the locking assembly includes a connecting plate fixedly mounted on the outside of the hydraulic cylinder, a stepper reciprocating motor mounted on the connecting plate, a support rod mounted on the output end of the stepper reciprocating motor, and a locking ring mounted on one end of the support rod.

[0012] Furthermore, the stepper reciprocating motor is provided with a protective housing.

[0013] Furthermore, it also includes tilt sensors, strain gauges, settlement monitoring points, and pressure sensors for monitoring the pressure of the adjustable support device.

[0014] The technical effects achieved by this utility model are as follows:

[0015] 1. By wrapping the original foundation with a large reinforced foundation platform, the original independent foundations are connected into a whole, sharing the load and greatly improving the rigidity and stability of the foundation.

[0016] 2. Large-area raft foundations effectively reduce additional stress on the foundation, mitigating settlement at its source.

[0017] 3. The adjustable support device can not only provide anti-overturning moment, but also actively adapt to foundation deformation through later adjustment, realizing "dynamic correction" of the tower tilt. This is something that traditional passive reinforcement methods cannot achieve. Even if part of the foundation fails, the inclined support system and the overall pile cap can still form a new load transfer path to prevent catastrophic collapse.

[0018] 5. The integrated monitoring system enables real-time perception of the health status of reinforced structures, transforming periodic inspections into predictive maintenance and improving operation and maintenance levels.

[0019] 6. By setting up a locking component, the risk of loss of support due to possible chronic leakage of the hydraulic system is avoided. Even if the hydraulic system fails completely in the future, the mechanically locked structure can still provide reliable support. The system can safely switch from an active adjustment state to a passive locking state, ensuring structural safety in extreme situations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a front view of the utility model;

[0022] Figure 3 This is a schematic diagram of the adjustable support device of this utility model;

[0023] Figure 4 This is a structural schematic diagram of the locking component of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Original tower base; 2. Reinforced foundation; 3. Raft foundation; 4. Inclined support piles; 5. Hydraulic cylinder; 6. Piston; 7. Top rod; 8. Connecting plate; 9. Locking hole; 10. Connecting plate; 11. Stepper reciprocating motor; 12. Support rod; 13. Locking ring. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figures 1-4 As shown, a reinforcement structure for high-voltage power line tower base in a mining subsidence area includes an original tower base 1, a reinforced concrete reinforcement platform 2 at the bottom of the original tower base 1, a stress diffusion raft 3 at the bottom of the reinforcement platform 2, and multiple sets of adjustable support devices on the outside of the reinforcement platform 2.

[0028] Each adjustable support device includes an inclined support pile 4 anchored in stable soil. One end of the inclined support pile 4 is hinged to a hydraulic jack assembly. The end of the hydraulic jack assembly away from the inclined support pile 4 is hinged to the reinforced foundation 2, and a locking component is provided on the hydraulic jack assembly.

[0029] The inclined support pile 4 is a micro pile group or steel pipe pile. The inclined support pile 4 is driven into the soil in the settlement stability zone at a certain angle to provide reliable anchoring and lateral restraint.

[0030] Meanwhile, the hydraulic jack assembly includes a hydraulic cylinder 5 hinged to one end of the inclined support pile 4. Inside the hydraulic cylinder 5 is a piston 6, and on the piston 6 is a push rod 7. One end of the push rod 7 passes through the hydraulic cylinder 5 and is fitted with a connecting plate 8. One side of the connecting plate 8 is hinged to the reinforced bearing platform 2, and the push rod 7 is provided with multiple locking holes 9.

[0031] When uneven settlement of the foundation causes the reinforced pier 2 to tilt, the hydraulic cylinder 5 can be adjusted to move the piston 6 and the top rod 7, actively applying a corrective force to the pier to offset part of the effects of uneven settlement and achieve dynamic adjustment of the tower's posture.

[0032] It should be noted that the hydraulic jack assembly is also equipped with a pump station, which enables the hydraulic cylinder 5 to work. This is existing technology and will not be elaborated on here.

[0033] The locking assembly includes a connecting plate 10 fixedly mounted on the outside of the hydraulic cylinder 5. A stepper reciprocating motor 11 is mounted on the connecting plate 10. A support rod 12 is mounted on the output end of the stepper reciprocating motor 11. A locking ring 13 is mounted on one end of the support rod 12. The stepper reciprocating motor 11 drives the support rod 12 to rotate the locking ring 13, thereby entering the locking hole 9 for mechanical locking.

[0034] The stepper reciprocating motor 11 is equipped with a protective housing to protect it from damage.

[0035] It also includes tilt sensors, strain gauges, settlement monitoring points, and pressure sensors for monitoring the pressure of the adjustable support device. The sensor signals are connected to a control platform, which can automatically or manually control the adjustable support device to adjust its length based on the tilt sensor data.

[0036] It should be noted that the operating principles, connection methods, and circuit diagrams of tilt sensors, strain gauges, settlement monitoring points, and pressure sensors used to monitor the pressure of adjustable support devices are all existing technologies and will not be elaborated upon here.

[0037] A construction method for reinforcing and strengthening high-voltage power line tower foundations in mining subsidence areas:

[0038] 1. During construction, firstly, a foundation pit is excavated around the original tower base 1 to expose the original foundation. Then, reinforced concrete stress diffusion raft slab 3 is poured at the bottom of the foundation pit. Next, the surface of the original tower base 1 is roughened and reinforced with rebar, and the reinforcing mesh of the reinforced foundation 2 is tied to connect it with the rebar and the reinforcing mesh of the raft slab 3.

[0039] 2. At the predetermined location, construct inclined support piles 4 into the stable soil and rock layer outside the settlement influence zone at a certain angle.

[0040] 3. Install an adjustable support device. The two ends of the device are connected to the connectors pre-embedded on the side of the reinforced foundation 2 and the connectors on the top of the inclined support pile 4 through a universal hinge mechanism. The universal hinge mechanism ensures that the force is mainly axial force and avoids the generation of bending moment.

[0041] 4. After all components are installed, pour concrete to reinforce the foundation 2, so that it can be combined with the stress diffusion raft 3 and the original tower base 1 into a solid whole.

[0042] 5. Install tilt sensors and other monitoring equipment on the reinforced foundation 2 or on the tower legs. When monitoring data indicates that the tower base tilts beyond the allowable value, the adjustable support device can be activated to adjust its length and apply a reverse jacking or pulling force to the reinforced foundation 2, thereby correcting the tower base tilt and restoring it to a safe state.

[0043] 6. Lock the hydraulic jack assembly using the locking mechanism.

[0044] The working principle of this utility model is as follows: After the original tower base 1 is constructed, the original tower base 1, the reinforced foundation 2, and the stress diffusion raft 3 are integrated into a whole load-bearing system by means of rebar installation and concrete pouring. This new whole significantly increases the bottom area and self-weight of the foundation, improving the initial stability of the foundation. The inclined support piles 4 are anchored at a certain angle in the stable soil far from the settlement zone, forming strong inclined anchor points. The hydraulic jack assembly acts as a connecting rod, connecting the reinforced foundation 2 to these stable anchor points. At this time, the load of the tower is transmitted through two paths: through the reinforced foundation 2 and the stress diffusion raft 3, it is transmitted downward to the foundation soil; through the hinge point, it is transmitted to the inclined support piles 4 in the form of axial pressure via the hydraulic jack assembly, and finally borne by the stable soil. This path provides certain lateral constraints and anti-overturning moments in advance. When uneven settlement occurs in the underground goaf, causing the foundation soil on one side of the reinforced foundation 2 to sink, the tilt sensors installed on the tower body or foundation monitor the tilt changes of the tower base in real time. When the tilt value exceeds the preset safety threshold, the system issues an alarm. Based on the monitoring data, the operation and maintenance personnel, or the intelligent control platform, automatically send instructions to the pump station and control valve of the hydraulic jack assembly on the side that needs to be lifted. Upon receiving the instructions, the hydraulic jack begins to move, and its piston rod 6 extends. Since the inclined support pile 4 is anchored in the stable soil and its position is relatively fixed, the jacking force of the jack will act in the opposite direction on the side of the reinforced foundation 2. This jacking force acting on the side of the foundation will generate a corrective moment, which is opposite to the overturning moment caused by the foundation settlement. By precisely controlling the lifting force and displacement of the jacks, the already tilted reinforced foundation 2 and upper tower can be effectively corrected back to a vertical state. During this process, the pressure sensors installed on the jacks can provide real-time feedback on the magnitude of the support force, ensuring a smooth and controllable correction process and avoiding secondary damage to the original structure. Once the tower base is corrected to the allowable verticality range, the locking assembly is immediately activated. After locking, the hydraulic jack system can release the oil pressure. Subsequently, the purely mechanical structure of the locking assembly will bear and maintain the support force of the support point for a long time, avoiding the risk of loss of support force due to possible chronic leakage of the hydraulic system. Even if the hydraulic system fails completely in the future, the mechanically locked structure can still provide reliable support. The system safely switches from an active adjustment state to a passive locking state, ensuring structural safety in extreme situations.

[0045] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A reinforcement structure for high-voltage power line tower foundations in mining subsidence areas, comprising the original tower foundation (1), characterized in that: The original tower base (1) is provided with a reinforced concrete support platform (2) at the bottom, and a stress diffusion raft (3) is provided at the bottom of the support platform (2). Multiple adjustable support devices are provided on the outside of the support platform (2). Each of the adjustable support devices includes an inclined support pile (4) anchored in stable soil, one end of which is hinged to a hydraulic jack assembly, the other end of which is hinged to the reinforced foundation (2), and the hydraulic jack assembly is provided with a locking component.

2. The reinforcement structure for high-voltage power line tower foundations in mining subsidence areas according to claim 1, characterized in that: The inclined support pile (4) is a micro pile group or a steel pipe pile.

3. The reinforcement structure for high-voltage power line tower foundations in mining subsidence areas according to claim 1, characterized in that: The hydraulic jack assembly includes a hydraulic cylinder (5) hinged to one end of the inclined support pile (4). A piston (6) is provided inside the hydraulic cylinder (5). A push rod (7) is provided on the piston (6). One end of the push rod (7) passes through the hydraulic cylinder (5) and is fitted with a connecting plate (8). One side of the connecting plate (8) is hinged to the reinforced support platform (2), and the push rod (7) is provided with multiple locking holes (9).

4. The reinforcement structure for high-voltage power line tower foundations in mining subsidence areas according to claim 3, characterized in that: The locking assembly includes a connecting plate (10) fixedly disposed on the outside of the hydraulic cylinder (5), a stepper reciprocating motor (11) is disposed on the connecting plate (10), a support rod (12) is installed at the output end of the stepper reciprocating motor (11), and a locking ring (13) is disposed at one end of the support rod (12).

5. The reinforcement structure for high-voltage power line tower foundations in mining subsidence areas according to claim 4, characterized in that: The stepper reciprocating motor (11) is provided with a protective housing.

6. The reinforcement structure for high-voltage power line tower foundations in mining subsidence areas according to claim 1, characterized in that: It also includes tilt sensors, strain gauges, settlement monitoring points, and pressure sensors for monitoring the pressure of adjustable support devices.

Images