Rapidly-repairing structure and method for reinforced slope

Abstract

The application provides a reinforced slope rapid repairing method, and relates to the technical field of foundation treatment, which comprises the following steps: removing landslide soil from the landslide area of a reinforced slope, cleaning floating soil, and excavating a step inside the reinforced slope along the sliding surface of the landslide area; supporting a formwork on the original slope surface of the reinforced slope, and tightly fixing the reinforcing material in the reinforced slope to the formwork; mixing self-compacting solidified soil according to a preset mixing ratio; layer-by-layer pouring self-compacting solidified soil in the landslide area to form a self-compacting solidified soil body, and removing the formwork after the self-compacting solidified soil body reaches a preset strength; wherein the pouring of a new layer of self-compacting solidified soil is performed after the initial setting of the poured self-compacting solidified soil layer adjacent to the new layer. The application also provides a reinforced slope rapid repairing structure. The reinforced slope rapid repairing structure and method can solve the technical problems of large excavation range, complicated repairing process and unreliable backfill construction quality in the prior art.

Description

Technical Field

[0001] This invention relates to the field of foundation treatment technology, specifically to a reinforced slope rapid repair structure and method. Background Technology

[0002] Reinforced slopes and reinforced soil retaining walls are susceptible to localized shallow landslides under conditions of short-term heavy rainfall or continuous seepage. To ensure the safety and normal use of the slopes and the superstructures, it is necessary to promptly repair the reinforced slopes and reinforced soil retaining walls.

[0003] Traditional methods for repairing reinforced slopes and reinforced soil retaining walls typically involve restoring the original condition. This method has the following main drawbacks:

[0004] (1) Large excavation area

[0005] When restoring a slope to its original state, it is necessary to first excavate the entire landslide body and surrounding loose soil. Because a working face that meets the requirements of construction machinery needs to be created, the excavation area often needs to be significantly expanded beyond the landslide area, resulting in a large construction impact area. At the same time, the newly formed large area of ​​open space increases the risk of secondary landslides on the slope.

[0006] (2) The repair process for reinforcing materials and panels is complicated.

[0007] The landslide's panels and reinforcement were largely destroyed, requiring restoration work. The new reinforcement needed to be tied to the original reinforcement and tightened to the panels, a complex and time-consuming process.

[0008] (3) The quality of earthwork backfilling construction is uncontrollable

[0009] When backfilling earthwork in slope areas, due to the limitation of the working area, it is often impossible to use large machinery such as heavy road rollers. Relying solely on small machinery such as frog rammers for earthwork backfilling results in unreliable compaction quality and cannot guarantee the quality of backfilling. Summary of the Invention

[0010] The purpose of this invention is to provide a rapid repair structure and method for reinforced slopes, solving the technical problems of large excavation area, cumbersome repair process and unreliable backfill construction quality in the prior art.

[0011] To achieve the above objectives, the present invention provides a method for rapid repair of reinforced slopes, comprising: removing landslide soil from the landslide area of ​​the reinforced slope, clearing loose soil, and excavating steps inside the reinforced slope along the sliding surface of the landslide area; setting up a template on the original slope surface of the reinforced slope and tightening and fixing the reinforcing materials inside the reinforced slope to the template; mixing self-compacting solidified soil according to a preset mix ratio; pouring self-compacting solidified soil in layers within the landslide area to form a self-compacting solidified soil body; and removing the template after the self-compacting solidified soil body reaches a preset strength; wherein, the pouring of a new layer of self-compacting solidified soil is carried out after the initial setting of the adjacent already poured self-compacting solidified soil layer.

[0012] This invention also provides a rapid repair structure for reinforced slopes, formed using the aforementioned rapid repair method for reinforced slopes. The rapid repair structure for reinforced slopes includes a reinforced slope, reinforcing bars, a panel, and self-compacting solidified soil. The reinforced slope has multiple stepped sections, and the self-compacting solidified soil connects to the reinforced slope at the stepped sections. The multiple stepped sections provide upward support to at least a portion of the self-compacting solidified soil. The panel is supported on the outer slope surface of the reinforced slope, and the reinforcing bars extend outward from the inside of the reinforced slope through the self-compacting solidified soil.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. Small impact area and high safety: Only the loose soil in the landslide area is cleared and steps are excavated. There is no need for large-scale excavation, which preserves the original stable soil to the greatest extent and reduces construction disturbance and the risk of secondary landslides.

[0015] 2. Fast construction speed and simple process: Utilizing the self-compacting and curing properties of soil that do not require compaction, the complex earthwork compaction process in traditional methods is eliminated; at the same time, the cumbersome steps of reinforcement repair and panel restoration are simplified, and the repair period is greatly shortened.

[0016] 3. Reliable backfill quality and structural stability: The self-compacting solidified soil has good fluidity and can be compacted by its own weight, filling the space fully and avoiding the problem of poor compaction quality in narrow spaces. Combined with stepped excavation and subsequent contact zone grouting, it ensures a tight bond between the old and new structures and overall stability.

[0017] Preferably, after the self-compacting soil is poured in layers, grouting is performed at the contact zone between the self-compacting soil and the reinforced slope to reinforce the loose soil within the contact zone. Grouting effectively fills and reinforces the voids and disturbed areas at the junction of the old and new soil, ensuring the overall stability of the repaired slope.

[0018] Preferably, the method further includes: after removing the landslide soil from the reinforced slope, straightening the exposed reinforcement materials in the landslide area, and taking samples to test the durability of the reinforcement materials to determine whether the reinforcement materials meet the requirements for subsequent use; if not, driving soil nails into the reinforced slope. By assessing the remaining strength of the original reinforcement materials, for reinforcement materials that are severely aged or damaged, adding soil nails as a reinforcement measure ensures the long-term safety of the repaired structure.

[0019] Preferably, at least a portion of the soil nail is exposed in the landslide area so that it can be anchored in the newly formed soil during subsequent pouring of self-compacting soil, further enhancing the connection between the old and new structures.

[0020] Preferably, the self-compacting solidified soil is cured to a predetermined age or at least 50% of its design strength to ensure that it has sufficient strength to withstand subsequent construction loads and to facilitate subsequent grouting or formwork removal.

[0021] Preferably, during the layered pouring of self-compacting soil, the flowability of the self-compacting soil is randomly measured. When the flowability is less than a preset threshold, the self-compacting soil is vibrated to ensure that the self-compacting soil is filled densely.

[0022] Preferably, a grouting layer is also provided between the self-compacting solidified soil and the reinforced slope.

[0023] Preferably, soil nails are driven into the reinforced slope.

[0024] Preferably, at least a portion of the soil nail is located within the self-compacting solidified soil. Attached Figure Description

[0025] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 A flowchart illustrating a rapid repair method for reinforced slopes provided by this invention;

[0027] Figure 2 This is a structural diagram of the reinforced slope before repair.

[0028] Figure 3 This is a schematic diagram of the structure after the reinforced slope repair.

[0029] Figure 4 This is a structural diagram of the reinforced retaining wall before repair.

[0030] Figure 5This is a schematic diagram of the structure after the reinforced retaining wall has been repaired.

[0031] In the diagram: 1. Reinforced slope; 2. Reinforcing material; 3. Panel; 4. Self-compacting soil; 5. Formwork; 6. Stepped section; 7. Grouting layer; 8. Soil nail; 9. Sliding surface. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Figure 1 This is a flowchart illustrating a rapid repair method for reinforced slopes provided by the present invention. Figure 1 As shown in the figure, this embodiment discloses a method for rapid repair of reinforced slopes. This embodiment takes the repair of a reinforced slope that has experienced a shallow landslide as an example for illustration.

[0035] Step S101: Conduct on-site cleanup and slope preparation. Figure 2 This is a schematic diagram of the slope before reinforcement repair, as shown below. Figure 2 As shown, the landslide mass (collapsed or slidable soil) and loose soil on the slope surface are removed from the landslide area of ​​the reinforced slope, exposing the stable reinforced slope 1 and its internal reinforcement 2. The panel at the outer slope surface of the landslide soil is then removed. Next, a multi-level stepped section 6 is excavated along the sliding surface 9 of the landslide area into the interior of the reinforced slope 1. The purpose of excavating the steps is to increase the anti-sliding capacity of the interface between the old and new soil and to allow the newly backfilled soil to receive some of the support from the undisturbed soil. If there is a height difference between the two sides of the landslide bottom, it should also be excavated in a stepped shape to ensure the stability of the base.

[0036] In some preferred embodiments, the exposed reinforcing bars 2 are combed to make them smooth and free of tangles, and samples of the reinforcing bars 2 are taken to test their durability indicators (such as tensile strength retention rate) to determine whether these original reinforcing bars can still meet the stress requirements within the design service life. If the test results show that the reinforcing bars are severely aged and do not meet the requirements, soil nails 8 are driven into the original reinforced slope 1 as an additional reinforcement measure. One end of the soil nail 8 should be anchored in the stable reinforced slope 1, and the other end may optionally be exposed in the landslide area so as to form a whole with the subsequently poured soil.

[0037] Step S102: As Figure 3As shown, a formwork 5 for fixing the reinforcing steel is erected at the original slope position of the reinforced slope 1 (i.e., the slope position of the landslide soil). The position of the formwork 5 is the outer slope position of the future new soil. The reinforcing steel 2 is tightened and reliably fixed to the formwork 5 with clamps or connectors. The formwork 5 is connected to the panel 3 below it.

[0038] Step S103: Preparation of self-compacting soil. Self-compacting soil is a filling material with a certain strength, fluidity, and self-compacting effect, formed by mixing soil, curing agent, water, and additives in a certain proportion. The self-compacting soil is prepared on-site or at a mixing plant according to the mix proportions determined through pre-testing (e.g., the ratio of soil, curing agent, water, and additives). Before pouring, the fluidity of the mixture should be tested to verify whether its strength, fluidity, and other indicators meet the construction requirements for achieving a self-compacting effect.

[0039] Step S104: Self-compacting soil is poured in layers within the landslide area to form self-compacting soil body 4. In some preferred embodiments, the layer thickness is determined based on the project scale and the properties of the self-compacting soil; in this embodiment, it is controlled to be no more than 2m per layer. During the pouring process, the flowability of the self-compacting soil is measured continuously. If the flowability decreases due to excessive time or other reasons, and falls below a preset threshold, an immersion concrete vibrator can be used for auxiliary vibration to ensure that it fills all corners, especially the contact surfaces with the step section 6 and exposed reinforcement and soil nails 8. In some preferred embodiments, the pouring of the upper layer of self-compacting soil is completed before the initial setting of the lower layer to ensure good interlayer bonding. The total time from mixing to completion of filling the self-compacting soil should not exceed 3 hours.

[0040] After the layered pouring is completed, the self-compacting soil 4 is cured until it reaches the predetermined age (e.g., 7 or 14 days) or its strength is not less than 50% of the design strength. After the self-compacting soil 4 reaches the preset strength, the formwork 5 is removed.

[0041] In some preferred embodiments, grouting reinforcement is performed after curing and before formwork removal. In the contact zone between the self-compacting soil 4 and the original reinforced slope 1, pressure grouting is performed through pre-embedded grouting pipes or boreholes to form a grout layer 7. The grout can penetrate and fill pores and loose areas formed due to construction disturbance or original causes, tightly bonding the old and new soil parts together, reinforcing the loose soil within the contact zone, thereby ensuring the overall stability of the reinforced slope.

[0042] Example 2

[0043] Figure 4 and Figure 5 These are schematic diagrams showing the reinforced soil retaining wall before and after repair. Figure 4-5As shown, this embodiment describes a method for repairing a reinforced soil retaining wall that has experienced a shallow landslide. The difference from Embodiment 1 is that, as a special form of reinforced slope, the reinforced soil retaining wall has a different slope angle than a conventional reinforced slope; it has an inclination angle of nearly 90 degrees relative to the horizontal plane. The repair method for the reinforced soil retaining wall is the same as the repair method for a conventional reinforced slope in Embodiment 1, and will not be repeated here.

[0044] Example 3

[0045] This embodiment discloses a rapid repair structure for reinforced slopes formed by the method described in Embodiment 1. For example... Figure 3 or Figure 5 As shown, the reinforced slope rapid repair structure includes: a reinforced slope 1, reinforcing bars 2, a panel 3, and self-compacting solidified soil 4. The reinforced slope 1 has multi-level stepped sections 6. The self-compacting solidified soil 4 is stably connected to the reinforced slope 1 through the stepped sections 6. The stepped sections 6 provide upward support to at least part of the self-compacting solidified soil 4. The panel 3 is supported on the outer slope surface of the reinforced slope 1. The reinforcing bars 2 extend from the inside of the reinforced slope 1 outward through the self-compacting solidified soil 4.

[0046] In some preferred embodiments, a grouting layer 7 is further provided between the self-compacting soil 4 and the reinforced slope 1. In some more preferred embodiments, soil nails 8 are driven into the reinforced slope 1, with one end of the soil nail 8 anchored in the reinforced slope 1 and the other end optionally buried in the self-compacting soil 4.

[0047] The foregoing description of various embodiments of the invention is provided for the purpose of description to those skilled in the art. It is not intended to be exhaustive or to limit the invention to a single disclosed embodiment. As mentioned above, various alternatives and variations of the invention will be apparent to those skilled in the art to which the foregoing pertains. Therefore, while some alternative embodiments have been specifically discussed, other embodiments will be obvious or readily apparent to those skilled in the art. The invention is intended to include all alternatives, modifications, and variations of the invention already discussed herein, as well as other embodiments falling within the spirit and scope of the foregoing claims.

[0048] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A rapid repair method for reinforced slopes, including the following steps: Remove the landslide soil from the landslide area of ​​the reinforced slope, clear away the loose soil, and excavate steps inside the reinforced slope along the sliding surface of the landslide area. A template is erected on the original slope surface of the reinforced slope, and the reinforcing bars in the reinforced slope are tightened and fixed to the template. Prepare self-compacting and solidifying soil according to the preset mix ratio; In the landslide area, self-compacting soil is poured in layers to form a self-compacting soil body. The formwork is removed after the self-compacting soil body reaches the preset strength. The pouring of a new layer of self-compacting soil is carried out after the initial setting of the adjacent layer of self-compacting soil.

2. The method according to claim 1, characterized in that, After the self-compacting soil is poured in layers, grouting is performed at the contact zone between the self-compacting soil and the reinforced slope to reinforce the loose soil in the contact zone.

3. The method according to claim 2, characterized in that, After the landslide soil is removed from the reinforced slope, the exposed reinforcement materials in the landslide area are straightened and samples are taken to test the durability of the reinforcement materials to determine whether the reinforcement materials meet the requirements for subsequent use; if they do not meet the requirements, soil nails are driven into the reinforced slope.

4. The method according to claim 3, characterized in that, At least a portion of the soil nails is exposed in the landslide area.

5. The method according to claim 2, further characterized in that... include, The self-compacting solidified soil is cured to the predetermined age or to a strength not less than 50% of the design strength.

6. The method according to claim 1, further characterized in that... include, During the layered pouring of self-compacting soil, the flowability of the self-compacting soil is randomly measured. When the flowability is less than a preset threshold, the self-compacting soil is vibrated.

7. A reinforced slope rapid repair structure, characterized in that, The reinforced slope rapid repair method according to claim 1 is used to form a reinforced slope rapid repair structure comprising a reinforced slope, reinforcing bars, a panel, and self-compacting solidified soil; the reinforced slope has a multi-step section, the self-compacting solidified soil is connected to the reinforced slope at the step section, the multi-step section provides upward support to at least a portion of the self-compacting solidified soil, the panel is supported on the outer slope surface of the reinforced slope, and the reinforcing bars extend outward from the inside of the reinforced slope through the self-compacting solidified soil.

8. The structure according to claim 7, characterized in that, A grouting layer is also provided between the self-compacting solidified soil and the reinforced slope.

9. The structure according to claim 8, characterized in that, Soil nails were driven into the reinforced slope.

10. The structure according to claim 9, characterized in that, At least a portion of the soil nail is located within the self-compacting solidified soil.

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