Existing slope masonry removal and excavation method near existing highway

Abstract

The present invention discloses a method for demolishing and excavating the masonry of an existing slope adjacent to an existing highway to form anti-slide piles; the method includes: corresponding to the section where the anti-slide piles belong, cutting and excavating the existing slope to form an excavation area and slope soil; obtaining the geological stability condition of the excavation area; selecting a corresponding protection form according to the geological stability condition; and forming a temporary support in the excavation area according to the protection form to complete the excavation construction. By monitoring the geological conditions in the area between the existing highway and the existing slope, the present invention can timely detect whether the soil body of the slope slides due to the construction of the anti-slide piles, so as to timely form a temporary support at the junction of the existing highway and the existing slope to protect the existing highway, prevent the soil body sliding down the slope from affecting the existing highway, thereby ensuring the driving safety on the existing highway and preventing a long-term impact on the existing highway.

Description

Technical Field

[0001] The present invention relates to the technical field of the demolition and excavation of existing masonry slopes adjacent to existing roads, and particularly to a method for demolishing and excavating existing masonry slopes adjacent to existing roads. Background Art

[0002] An anti-slide pile is a pile column that penetrates through the landslide body and extends into the sliding bed, used to resist the sliding force of the landslide body and play a role in stabilizing the slope. It is suitable for shallow and medium-thick landslides and is a main measure for anti-slide treatment.

[0003] The role of the anti-slide pile on the landslide body is to utilize the resistance (anchoring force) of the stable formation below the sliding surface inserted by the anti-slide pile to balance the thrust of the sliding body and increase its stability. When the landslide body slides down, it is resisted by the anti-slide pile, making the sliding body in front of the pile reach a stable state. According to the thickness of the sliding body, the magnitude of the thrust, the waterproof requirement, and the construction conditions, wooden piles, steel piles, concrete, and reinforced concrete piles are selected. The depth of the anti-slide pile buried below the ground layer, according to general experience, the anchoring depth in soft rock formations is one-third of the designed pile length; in hard rock formations, it is one-fourth of the designed pile length; in soil sliding beds, it is one-half of the designed pile length. When the soil layer slides along the bedrock surface, the anchoring depth is also sometimes taken as 2 - 5 times the pile diameter. The layout forms of anti-slide piles include connected pile rows, spaced-apart pile rows, pile rows with intervals at the lower part and connections at the top, and spaced-apart anchor piles, etc. The spacing between pile columns generally takes 3 - 5 times the pile diameter, with the principle of ensuring that the sliding soil mass does not slide out between the piles.

[0004] However, when constructing anti-slide piles on slopes adjacent to existing roads, the construction efficiency of existing conventional construction technologies is relatively low, the occupation time of the existing road is relatively long, resulting in a greater impact on the existing road, and during construction, the vibration generated is likely to cause the soil mass on the slope to slide, creating potential safety hazards. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method for demolishing and excavating existing masonry slopes adjacent to existing roads, aiming to solve the technical problems in the prior art that when constructing anti-slide piles on slopes adjacent to existing roads, the construction efficiency of existing conventional construction technologies is relatively low, the occupation time of the existing road is relatively long, resulting in a greater impact on the existing road, and during construction, the vibration generated is likely to cause the soil mass on the slope to slide, creating potential safety hazards.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The present invention provides a method for demolishing and excavating existing masonry slopes adjacent to existing roads for forming anti-slide piles;

[0008] The method includes:

[0009] Corresponding to the paragraph where the anti-slide pile is located, slope cutting and excavation are carried out on the existing slope to form an excavation area and slope soil mass.

[0010] Obtain the geological stability condition of the excavation area.

[0011] According to the geological stability condition, select the corresponding protection form.

[0012] According to the protection form, a temporary support is formed in the excavation area to complete the excavation construction.

[0013] Optionally, in the above method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the step of corresponding to the paragraph where the anti-slide pile is located and carrying out slope cutting and excavation on the existing slope to form an excavation area and slope soil mass includes:

[0014] Obtain the full length of the paragraph where the anti-slide pile is located.

[0015] According to the full length of the paragraph where the anti-slide pile is located, longitudinally excavate the existing slope corresponding to the paragraph where the anti-slide pile is located on the existing slope to form the excavation area.

[0016] Optionally, in the above method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the height of the excavation area is 6m, the bottom width of the cross-section of the excavation area is 2.75m, the distance from the toe of the slope of the excavation area to the edge of the anti-slide pile is 1.25m, and the slope ratio of the excavation area is 1:0.3.

[0017] Optionally, in the above method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the step of obtaining the geological stability condition of the excavation area includes:

[0018] Judge whether the soil mass in the excavation area has slipped.

[0019] If so, construct the first protection structure.

[0020] If not, construct the second protection structure.

[0021] Optionally, in the above method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the step of if so, constructing the first protection structure includes:

[0022] Suspend the construction, and form the first protection structure by slip form on the side of the existing highway close to the existing slope.

[0023] The step of if not, constructing the second protection structure includes:

[0024] Continue the construction, and form the second protection structure by slip form on the side of the existing highway close to the existing slope.

[0025] Among them, the height of the first protective structure is greater than that of the second protective structure.

[0026] Optionally, in the above-mentioned method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the step of forming a temporary support in the excavation area according to the protection form and completing the excavation construction includes:

[0027] Form the temporary support in the excavation area by shotcreting and anchor bolting to complete the excavation construction.

[0028] Optionally, in the above-mentioned method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the step of forming the temporary support in the excavation area by shotcreting and anchor bolting and completing the excavation construction includes:

[0029] Use φ22mm mortar anchor bolts to form a support structure arranged in a rectangular staggered pattern in the excavation area;

[0030] Use the support structure to lay a steel mesh in the excavation area;

[0031] Spray concrete on the surface of the steel mesh to form the temporary support and complete the excavation construction.

[0032] Optionally, in the above-mentioned method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the length of the mortar anchor bolt is 3m.

[0033] Optionally, in the above-mentioned method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, there are multiple mortar anchor bolts, and a rectangular structure of 1.5m * 1.5m is formed by enclosing four adjacent mortar anchor bolts.

[0034] Optionally, in the above-mentioned method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway, the concrete is C25 shotcrete with steel mesh.

[0035] One or more of the above technical solutions provided by the present invention may have the following advantages or at least achieve the following technical effects:

[0036] A method for demolishing and excavating the masonry of an existing slope adjacent to an existing highway proposed by the present invention monitors the geological conditions in the area between the existing highway and the existing slope, timely discovers whether the soil body of the slope slides due to the construction of the anti-slide pile, and thus timely forms a temporary support at the junction of the existing highway and the existing slope to protect the existing highway, prevent the soil body sliding from the slope from affecting the existing highway, thereby ensuring the driving safety on the existing highway and preventing a long-term impact on the existing highway. Description of the Drawings

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these provided drawings.

[0038] Figure 1 It is a schematic flow chart of the method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway in the present invention;

[0039] Figure 2 For Figure 1 It is a detailed flow chart of step S100 in

[0040] Figure 3 For Figure 1 It is a detailed flow chart of step S300 in

[0041] Figure 4 For Figure 1 It is a detailed flow chart of step S400 in

[0042] The realization of the purpose, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. Specific embodiments

[0043] To make the purpose, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0044] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0045] In the present invention, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or system comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "comprising..." does not exclude the presence of additional identical elements in the process, method, article or system comprising that element. Additionally, the meaning of "and / or" as used throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously.

[0046] In the present invention, unless otherwise expressly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements.

[0047] In the present invention, if there are descriptions involving "first", "second", etc., such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0048] In the present invention, suffixes such as "module", "component", "part", "member" or "unit" used to denote elements are only for the convenience of explaining the present invention and have no specific meaning in themselves. Therefore, "module", "member" or "unit" can be used interchangeably.

[0049] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Additionally, the technical solutions of each embodiment can be combined with each other, provided that it is based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] The inventive concept of the present invention will be further elaborated below in conjunction with some specific embodiments.

[0051] The present invention provides a method for demolishing and excavating the masonry of an existing slope adjacent to an existing road.

[0052] Refer to Figure 1 , Figure 1This is a schematic flow chart of the method for demolishing and excavating the existing masonry slope adjacent to the existing highway in the present invention.

[0053] In an embodiment of the present invention, as Figure 1 shown, a method for demolishing and excavating the existing masonry slope adjacent to the existing highway is used to form anti-slide piles;

[0054] The method includes:

[0055] Step S100: Corresponding to the section where the anti-slide pile belongs, perform slope cutting and excavation on the existing slope to form an excavation area and slope soil mass;

[0056] Step S200: Obtain the geological stability condition of the excavation area;

[0057] Step S300: Select the corresponding protection form according to the geological stability condition;

[0058] Step S400: According to the protection form, form a temporary support in the excavation area to complete the excavation construction.

[0059] For easy understanding, a specific embodiment is shown below:

[0060] The section where the anti-slide pile belongs cuts and excavates the existing slope. The height of the excavation surface is 6m, the bottom width of the excavation cross-section is 2.75m, the distance from the slope toe to the edge of the anti-slide pile is 1.25m, the longitudinal length is the full length of the section, and the slope ratio is 1:0.3. According to the geological stability condition after excavation, the corresponding protection form is adopted. When the slope is basically stable, shotcrete is used for temporary support. The anchor rods are φ22 mortar anchor rods, L = 3m, with a spacing of 1.5×1.5m, arranged in a rectangular staggered pattern; the shotcrete is 10cm thick C25 mesh shotcrete, and the steel mesh is φ8, with a grid spacing of 20×20cm. The slope soil mass and the externally transported earth and stone are used for filling. A 2m high and 4m wide access road is filled with earth and stone, with an elevation 2m above the road surface, and the compaction degree of the filled soil is 92%.

[0061] Specifically, when obtaining the geological conditions of the excavation area, on the side of the existing highway adjacent to the existing slope, along the boundary line between the existing highway and the existing slope, a column is set every 2m, and the columns are connected by steel wires. When a certain steel wire touches the soil mass sliding on the slope, the column will tilt. Through the total station instrument installed at the head and tail, it can be known that a large displacement occurs at a certain column, that is, the slope soil mass has slipped. According to the monitored results, a temporary cutting with a height of 1m is formed by a slipform machine on the side of the existing highway adjacent to the existing slope to protect the existing highway.

[0062] The technical solution of the present invention monitors the geological conditions in the area between the existing road and the existing slope, and timely discovers whether the soil body of the slope slides due to the construction of the anti-slide pile, so as to timely form a temporary support at the junction of the existing road and the existing slope to protect the existing road and prevent the soil body sliding down the slope from affecting the existing road, thereby ensuring the driving safety on the existing road and preventing a long-term impact on the existing road.

[0063] Refer to Figure 2 , Figure 2 For Figure 1 the detailed process schematic diagram of step S100 in

[0064] In one embodiment, as Figure 2 shown, the steps of cutting and excavating the existing slope corresponding to the section where the anti-slide pile is located to form an excavation area and the slope soil body include:

[0065] Step S110: Obtain the full length of the section where the anti-slide pile is located;

[0066] Step S120: According to the full length of the section where the anti-slide pile is located, longitudinally excavate the existing slope corresponding to the section where the anti-slide pile is located on the existing slope to form an excavation area.

[0067] In one embodiment, the height of the excavation area is 6m, the bottom width of the cross-section of the excavation area is 2.75m, the distance from the toe of the slope of the excavation area to the edge of the anti-slide pile is 1.25m, and the slope ratio of the excavation area is 1:0.3.

[0068] Refer to Figure 3 , Figure 3 For Figure 1 the detailed process schematic diagram of step S300 in

[0069] In one embodiment, as Figure 3 shown, the steps of obtaining the geological stability condition of the excavation area include:

[0070] Step S310: Judge whether the soil body in the excavation area slides;

[0071] Step S320: If so, build the first protective structure;

[0072] Step S330: If not, build the second protective structure.

[0073] In one embodiment, if so, the steps of building the first protective structure include:

[0074] Step S321: Suspend the construction and form the first protective structure by slip form on the side of the existing road close to the existing slope;

[0075] If not, the steps of building the second protective structure include:

[0076] Step S331: Continue the construction and form a second protective structure by slip form on one side of the existing road close to the existing slope;

[0077] Among them, the height of the first protective structure is greater than the height of the second protective structure.

[0078] Specifically, when it is monitored that soil slides from the slope, in order to timely reduce the influence of the construction process of the anti-slide pile on the slope soil, the construction is suspended in time, and a slip form machine is used to form a concrete protective structure with a height of 1 m by slip form on one side of the existing road adjacent to the existing slope. The specific structure is a cutting, so as to prevent the soil from sliding down the slope and entering the existing road. Moreover, the efficiency of the slip form construction is extremely high, and the first protective structure can be formed in time;

[0079] When the soil on the slope does not slide, a second protective structure with a height less than 1 m is first formed by slip form construction on one side of the existing road. The first protection intervals are arranged on the side of the second protective structure facing the existing slope. While the second protective structure protects the slope soil from entering the road, it can also support the first protective structure, improve the structural stability of the first protective structure itself, and enhance the resistance of the first protective structure to the impact of the sliding of the slope soil, further reducing the influence of the construction process of the anti-slide pile on the existing road and improving the driving safety of the existing road.

[0080] In one embodiment, according to the protection form, forming a temporary support in the excavation area, the steps of completing the excavation construction include:

[0081] Step S410: Form a temporary support in the excavation area by shotcreting and bolting, and complete the excavation construction.

[0082] Refer to Figure 4 , Figure 4 For Figure 1 the detailed process schematic diagram of step S400 in

[0083] In one embodiment, as Figure 4 shown, the steps of forming a temporary support in the excavation area by shotcreting and bolting and completing the excavation construction include:

[0084] Step S411: Use φ22 mm mortar bolts to form a support structure arranged in a rectangular staggered pattern in the excavation area;

[0085] Step S412: Use the support structure to lay a steel mesh in the excavation area;

[0086] Step S413: Spray concrete on the surface of the steel mesh to form a temporary support and complete the excavation construction.

[0087] In one embodiment, to ensure the stability of the anchor bolt and thus the stability of the slope, the length of the mortar anchor bolt is 3 m.

[0088] In one embodiment, there are multiple mortar anchor bolts, and a rectangular structure of 1.5 m * 1.5 m is formed by enclosing four adjacent mortar anchor bolts.

[0089] In one embodiment, the concrete is C25 shotcrete.

[0090] It should be noted that the serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments. The above embodiments are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or directly or indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A method for demolishing and excavating the masonry of an existing slope adjacent to an existing highway, characterized in that, For forming anti-slide piles; The method includes: Corresponding to the paragraph where the anti-slide pile is located, cutting and excavating the existing slope to form an excavation area and slope soil mass; Obtaining the geological stability condition of the excavation area; Selecting a corresponding protection form according to the geological stability condition; Forming a temporary support in the excavation area according to the protection form to complete the excavation construction; The step of obtaining the geological stability condition of the excavation area includes: Judging whether the soil mass in the excavation area slides; If so, constructing a first protection structure; If not, constructing a second protection structure; The step of constructing the first protection structure when it is so includes: Suspending the construction and slip-forming a first protection structure on the side of the existing road close to the existing slope; The step of constructing the second protection structure when it is not so includes: Continuing the construction and slip-forming a second protection structure on the side of the existing road close to the existing slope; Wherein, the height of the first protection structure is greater than the height of the second protection structure; when obtaining the geological stability condition of the excavation area, on the side of the existing road adjacent to the existing slope, along the boundary line between the existing road and the existing slope, a column is set every 2 m, and the columns are connected by steel wires. When a certain steel wire touches the slope soil mass sliding on the existing slope, the column will tilt. By using the total stations installed at the head and tail, it can be known that a large displacement occurs in a certain column, that is, the soil mass of the existing slope has slid.

2. The method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway according to claim 1, characterized in that, The step of corresponding to the paragraph where the anti-slide pile is located, cutting and excavating the existing slope to form an excavation area and slope soil mass includes: Obtaining the full length of the paragraph where the anti-slide pile is located; According to the full length of the paragraph where the anti-slide pile is located, longitudinally excavating the existing slope corresponding to the paragraph where the anti-slide pile is located on the existing slope to form the excavation area.

3. The existing slope masonry breaking and excavation method near the existing highway according to claim 2, characterized in that, The height of the excavation area is 6 m, the bottom width of the cross-section of the excavation area is 2.75 m, the distance from the toe of the slope of the excavation area to the edge of the anti-slide pile is 1.25 m, and the slope ratio of the excavation area is 1:0.

3.

4. The existing slope masonry breaking and excavation method near the existing highway as described in claim 1, characterized in that, The step of forming a temporary support in the excavation area according to the protection form to complete the excavation construction includes: Forming the temporary support in the excavation area by shotcreting to complete the excavation construction.

5. The method for demolishing and excavating the masonry of an existing slope adjacent to an existing highway according to claim 4, characterized in that, The step of forming the temporary support in the excavation area by shotcreting to complete the excavation construction includes: Using φ22 mm mortar bolts to form a support structure arranged in a rectangular staggered pattern in the excavation area; Using the support structure to lay a steel mesh in the excavation area; Spraying concrete on the surface of the steel mesh to form the temporary support to complete the excavation construction.

6. The existing slope masonry breaking and excavation method near the existing highway as described in claim 5, characterized in that, The length of the mortar bolt is 3 m.

7. The method for demolishing and excavating the masonry of the existing slope adjacent to the existing highway according to claim 6, characterized in that, There are multiple mortar bolts, and a rectangular structure of 1.5 m * 1.5 m is formed by enclosing four adjacent mortar bolts.

8. The method for demolishing and excavating the masonry of an existing slope adjacent to an existing road as claimed in claim 5, characterized in that, The concrete is C25 shotcrete.

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