Multi-anchor-point slope body retaining structure with drainage function
By combining the multi-anchor point round pile structure with the slope drainage system, and using solar photovoltaic devices and deformation sensors for automated monitoring and control, the high cost and construction difficulties of traditional anti-slide piles in large-scale reinforcement and deep landslides are solved, and efficient and economical landslide treatment effects are achieved.
Patent Information
- Application Number
- CN202421013998.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-11
Smart Images
Figure CN222575521U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of slope support, and in particular relates to a multi-anchor point slope support structure with drainage function. Background Art
[0002] Rainfall is an important cause of landslide disasters. According to statistics, about 90% of landslides occur during the rainy season. This is because the entry of rainwater increases the moisture content of the soil, lubricates the soil particles, causes the friction between the soil particles to decrease, and weakens the matrix suction, electrostatic attraction, van der Waals force, and mineral cementation between particles, thereby reducing the strength of the soil and reducing the effective stress of the soil, causing soil deformation. That is, rainfall infiltrates the slope to form groundwater seepage, which will change the strength and deformation pattern of the rock and soil, and then induce disasters such as landslides and mud-rock flows. It can be seen that in order to effectively solve the landslide problem, the three factors of rock and soil strength, deformation and permeability should be interconnected, and the landslide problem should be effectively analyzed and solved in mutual coordination. At present, it is unreasonable to emphasize engineering support while ignoring the influence of groundwater or surface water in the treatment of rock and soil diseases. At the least, it will cause a sharp increase in the cost of the project. At the worst, with the aging of the rock and soil, it may still cause deformation and instability of the rock and soil.
[0003] At present, the measures used for slope reinforcement include grouting, traditional anti-slide piles, anchor rods or prestressed anchor cables. Among them, traditional anti-slide piles are considered to be an important support means for landslide control due to their high stiffness, flexible construction and wide applicability. However, traditional anti-slide piles are passive reinforcement structures. If they are used to reinforce large-scale landslides with deep sliding surfaces, the cross-sectional area and length of the pile body need to be increased, which leads to high costs and difficult construction. In recent years, multi-anchor circular pile structures have gradually been used in the treatment of medium and large landslides or high slope diseases due to their advantages such as large reinforcement force and high degree of mechanized construction. However, practitioners only use the support function of multi-anchor circular piles. When it is necessary to effectively drain groundwater, additional measures such as inclined drainage holes, drainage tunnels and water collection wells are still used, resulting in a series of problems such as delays in construction period and increased disturbance to the slope. Therefore, the effective combination of multi-anchor circular piles with landslide drainage systems is a cutting-edge trend in hydraulically driven landslide control, but no data has been reported yet. Although many scholars have combined traditional anti-slide piles with drainage systems to form drainage anti-slide pile structures, there are mainly three problems: ① Additional wires are needed to power the water pumps, but some landslide sites do not have the conditions to provide power for the water pumps, and pulling wires will lead to poor project economy and occupation of land resources; ② Regular manual pumping is required, which is time-consuming and labor-intensive; ③ There is no all-weather monitoring of the service status of the slope. Under extreme working conditions (earthquakes, rise and fall of reservoir water levels), the anti-slide structure is prone to deformation and damage, resulting in instability of the entire slope. Utility Model Content
[0004] In view of the problems mentioned in the background technology, the utility model proposes a multi-anchor point slope retaining structure with drainage function. By organically combining the multi-anchor point circular pile structure with the slope drainage system, additional drainage measures are reduced and economic benefits are obtained. By installing a solar photovoltaic device on the slope, the power supply required for the water pump is provided on site. At the same time, the utility model uses the groundwater level inside the pile body as the control parameter for drainage, replacing the previous manual drainage of the slope groundwater. Deformation sensors are arranged on the anchor cables, and the service status of the multi-anchor point circular pile structure is monitored for a long time based on the deformation threshold of the anchor cable, so as to issue early warnings and forecasts of engineering disasters such as landslides in a timely manner.
[0005] To this end, the utility model adopts the following technical solutions:
[0006] A multi-anchor point slope support structure with drainage function, comprising a round pile constructed along the slope, the lower end of the round pile passing through the sliding surface of the slope, a prestressed anchor cable constructed on the pile body of the round pile, and a drainage structure arranged on the round pile;
[0007] The drainage structure includes a water storage tank located at the lower center of the pile body, and the upper edge of the water storage tank is lower than the sliding surface; a fine sand layer is provided on the pile body close to the upper edge of the water storage tank, and the fine sand layer runs through the inside and outside of the pile body; the fine sand layer includes two layers and is located on the left and right sides of the pile body respectively, and the fine sand layer is in the shape of narrow strips; the two fine sand layers are high on the outside and low on the inside, so that the water outside the pile can flow into the inside of the pile body; the pile body above the sliding surface is wrapped with a flow filter, and the lower end of the flow filter extends to the fine sand layer;
[0008] A water guide hose is provided in the center of the pile body, the lower end of which extends into the water storage tank, and the upper end of which passes through the top of the pile; a water pump is arranged on the slope, and the water pump is connected to the water guide hose, and the water in the water storage tank is discharged through the water pump and the water guide hose.
[0009] Furthermore, it also includes a water level sensor arranged in the water storage tank, and the water level sensor is used to monitor the water level height in the water storage tank; when the water level height exceeds the design threshold, the water pump starts to drain water.
[0010] Furthermore, it also includes a solar photovoltaic panel arranged on the slope, which is used to power the water pump; it also includes a host computer, which is connected to the water level sensor and the water pump signal, and is used to control the start and stop of the water pump.
[0011] Furthermore, it also includes a deformation sensor arranged on the prestressed anchor cable, and the deformation sensor is connected to the host computer signal; when the deformation sensor detects that the deformation value exceeds the design threshold, the host computer issues an alarm.
[0012] Furthermore, a filter is arranged in the water storage tank to prevent debris from clogging the water hose.
[0013] The beneficial effects of the utility model are:
[0014] 1. The utility model combines multi-anchor round piles with strong retaining characteristics with slope drainage, realizes the integrated control of "seepage-strength deformation" of the slope, reduces additional drainage measures, and under the same conditions, the pile body size of the utility model is smaller than that of traditional anti-slide piles, so the utility model can effectively reduce the engineering cost of landslide control;
[0015] 2. By installing solar photovoltaic devices on the slope, the power supply required for the water pump, water level sensor and deformation sensor is provided on site, reducing maintenance costs;
[0016] 3. The underground water level inside the pile body is used as the control parameter for drainage, which realizes the automatic drainage of groundwater in the slope and saves manpower and material resources;
[0017] 4. Deformation sensors are installed on the anchor cables to monitor the service status of the multi-anchor circular pile structure for a long time based on the deformation threshold of the anchor cables, so as to issue early warnings and forecasts of engineering disasters such as landslides in a timely manner, thus reducing the probability of the entire slope becoming unstable due to damage to the supporting structure;
[0018] 5. The uneven reinforcement method (120°) is adopted for circular anti-slide piles to make up for the defect that the force bearing effect of circular anti-slide piles is worse than that of rectangular anti-slide piles. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 It is a construction schematic diagram of the pile body of the utility model;
[0021] Figure 3 yes Figure 1 Cross-sectional view of AA in the middle;
[0022] Figure 4 yes Figure 1 Cross-section of the middle BB;
[0023] In the figure: slope 1, sliding surface 2, pile body 3, anchor cable 4, anchor cable hole 5, anchor seat 6, anchor plate 7, clamp 8, concrete 9, one-way flow filter 10, fine sand layer 11, water storage tank 12, gravel layer 13, water level sensor 14, solar panel 15, controller 16, waterproof layer 17, water guide hose 18, filter 19, water pump 20, drainage ditch 21, outer ring steel cage 22, inner ring steel cage 23, first tension main reinforcement 24, first compression main reinforcement 25, second tension main reinforcement 26, second compression main reinforcement 27, deformation sensor 28, landslide thrust direction 29. DETAILED DESCRIPTION
[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:
[0025] like Figure 1 and 2 As shown, a multi-anchor slope support structure with drainage function includes round piles constructed along the slope, the lower end of the round pile passes through the sliding surface 2 of the slope, prestressed anchor cables 4 are also constructed on the pile body 3 of the round pile, and a drainage structure is provided on the round pile.
[0026] The drainage structure includes a water tank 12 located at the lower center of the pile body 3, and the upper edge of the water tank 12 is lower than the sliding surface 2; a fine sand layer 11 is provided on the pile body 3 close to the upper edge of the water tank 12, and the fine sand layer 11 runs through the inside and outside of the pile body 3; the fine sand layer 11 includes two layers and is respectively located on the left and right sides of the pile body 3, and the fine sand layer 11 is in the shape of narrow strips; the two fine sand layers 11 are high on the outside and low on the inside, so as to facilitate the water outside the pile to flow into the inside of the pile body 3; the pile body 3 above the sliding surface 2 is wrapped with a flow filter, and the lower end of the flow filter extends to the fine sand layer 11.
[0027] A water hose 18 is provided at the center of the pile body 3, the lower end of the water hose 18 extends into the water storage tank 12, and the upper end of the water hose 18 passes through the pile top; a water pump 20 is arranged on the slope, and the water pump 20 is connected to the water hose 18, and the water in the water storage tank 12 is discharged through the water pump 20 and the water hose 18. The pile top is sealed and a waterproof layer is constructed on the pile top. A filter is arranged in the water storage tank 12 to prevent debris from clogging the water hose 18.
[0028] It also includes a water level sensor 14 arranged in the water tank 12, and the water level sensor 14 is used to monitor the water level in the water tank 12; when the water level exceeds the design threshold, the water pump 20 starts to drain. It also includes a solar photovoltaic panel arranged on the slope, and the solar photovoltaic panel is used to power the water pump 20; it also includes a host computer, and the host computer is connected to the water level sensor 14 and the water pump 20 by signal, and the host computer is used to control the start and stop of the water pump 20. It also includes a deformation sensor 28 arranged on the prestressed anchor cable 4, and the deformation sensor 28 is connected to the host computer by signal; when the deformation sensor 28 detects that the deformation value exceeds the design threshold, the host computer issues an alarm.
[0029] like Figure 3 and 4 As shown, the reinforcement cage of the original pile includes an outer ring reinforcement cage 22 and an inner ring reinforcement cage 23, the outer ring reinforcement cage 22 includes a plurality of first tension main bars 24 and first compression main bars 25, the inner ring reinforcement cage 23 includes a plurality of second tension main bars 24 and second compression main bars, and the first tension main bars 24 and the second tension main bars are arranged using an uneven reinforcement method.
[0030] The construction method of the water tank 12 and the fine sand layer is as follows: a template is set up at the bottom of the steel cage to form the water tank 12 and the fine sand layer 11; the water tank 12 is located at the lower part of the center of the steel cage, and the upper edge of the water tank 12 is not higher than the sliding surface 2; the fine sand layer 11 is located at the sliding surface 2, and the fine sand layer 11 runs through the inside and outside of the steel cage. The fine sand layer 11 is used to connect the inside and outside of the pile body 3, so that the water outside the pile body 3 enters the water tank 12 through the fine sand layer 11. When pouring to the position of the water tank 12 and the fine sand layer 11, a gravel layer 13 and a fine sand layer 11 are arranged at the corresponding positions, and a water tank 12 is formed inside the gravel layer 13, and a water guide hose 18 is arranged in the center of the steel cage; after removing the template, subsequent concrete pouring is carried out, and the pile top is sealed. The one-way flow filter 10 is arranged after the pile hole is excavated.
Claims
1. A multi-anchor slope retaining structure with drainage function, characterized in that: It includes round piles constructed along the slope, the lower end of the round piles passes through the sliding surface of the slope, prestressed anchor cables are constructed on the pile bodies of the round piles, and drainage structures are provided on the round piles; The drainage structure includes a water storage tank located at the lower center of the pile body, and the upper edge of the water storage tank is lower than the sliding surface; a fine sand layer is provided on the pile body close to the upper edge of the water storage tank, and the fine sand layer runs through the inside and outside of the pile body; the fine sand layer includes two layers and is located on the left and right sides of the pile body respectively, and the fine sand layer is in the shape of narrow strips; the two fine sand layers are high on the outside and low on the inside, so that the water outside the pile can flow into the inside of the pile body; the pile body above the sliding surface is wrapped with a flow filter, and the lower end of the flow filter extends to the fine sand layer; A water guide hose is provided in the center of the pile body, the lower end of which extends into the water storage tank, and the upper end of which passes through the top of the pile; a water pump is arranged on the slope, and the water pump is connected to the water guide hose, and the water in the water storage tank is discharged through the water pump and the water guide hose.
2. The multi-anchor slope retaining structure with drainage function according to claim 1 is characterized in that: It also includes a water level sensor arranged in the water storage tank, which is used to monitor the water level height in the water storage tank; when the water level height exceeds the designed threshold, the water pump starts to drain water.
3. The multi-anchor slope retaining structure with drainage function according to claim 2 is characterized in that: It also includes a solar photovoltaic panel arranged on the slope, which is used to supply power to a water pump; and an upper computer, which is connected with a water level sensor and a water pump signal, and is used to control the start and stop of the water pump.
4. The multi-anchor slope retaining structure with drainage function according to claim 1, characterized in that: It also includes a deformation sensor arranged on the prestressed anchor cable, which is connected to the host computer signal; when the deformation sensor detects that the deformation value exceeds the design threshold, the host computer sends out an alarm.
5. The multi-anchor slope retaining structure with drainage function according to claim 1, characterized in that: A filter is arranged in the water storage tank to prevent debris from clogging the water guide hose.