Slope crest intercepting ditch structure based on excavation rock slope and construction method of slope crest intercepting ditch structure

Abstract

The invention relates to the field of slope water interception and drainage, in particular to a slope crest intercepting ditch structure based on an excavation rock slope and a construction method thereof.The slope crest intercepting ditch structure comprises structural steel bars and masonry bodies, and the structural steel bars are arranged on the slope crest at set intervals in the direction of the slope and perpendicular to the slope surface; the steel bars are connected with the slope surface steel bars and anchored into the slope surface concrete surface layer in a grounding manner; the masonry body comprises a brick masonry and sprayed concrete, the brick masonry is formed by laying hollow bricks on structural steel bars, and the hollow bricks are filled with the sprayed concrete, so that the brick masonry and the structural steel bars are connected into a whole. The brick masonry formed by building the hollow bricks is constructed on the structural steel bars of the slope top, concrete is sprayed into the brick masonry, the brick masonry and the structural steel bars are connected into a whole to form the intercepting ditch, the structure is simple, convenient and rapid to construct, grooves and pouring molds do not need to be manually excavated, large-scale mechanical equipment is not needed for construction, and the structure has the advantages of being low in manufacturing cost, convenient to construct and the like. The requirement of construction on the width of a working face is low.

Description

Technical Field

[0001] The invention relates to the field of slope interception and drainage, and in particular to a water interception ditch structure based on the top of an excavated rock slope and a construction method thereof. Background Art

[0002] In engineering construction, it is common to encounter existing excavated slope damage, such as bulging, seepage, cracks and other damage caused by water flow, which affects the bearing capacity of the slope. In order to ensure the long-term stability of the slope, it is necessary to construct a ditches to reduce damage.

[0003] At present, the methods commonly used for cutting / draining ditches on slopes mainly include: first digging trenches on the top of the slope by machinery / manually, and then pouring reinforced concrete or building brick walls to form cutting / draining ditches. However, these cutting / draining ditches all have certain disadvantages: for the formed high slope, machinery cannot be used to construct on the top of the slope, and manual excavation of rock slopes is not ideal, time-consuming and labor-intensive; in addition, since there is no construction access road on the top of the slope, it is difficult to transport construction materials such as cement, sand, and formwork to the top of the slope, which increases the construction cost, slows the construction speed, and also has the problem of high construction safety risks.

[0004] Based on the above problems, it is urgent to develop a slope top drainage construction technology that is simple, fast, safe and applicable. Summary of the invention

[0005] The present invention aims to solve the technical problems existing in the prior art. To this end, the present invention provides a cut-off ditch structure based on the top of an excavated rock slope and a construction method thereof.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] In a first aspect, a drainage ditch structure based on the top of an excavated rock slope is provided, comprising structural steel bars and a masonry body, wherein the structural steel bars are arranged at the top of the slope at set intervals along the direction of the slope, and are connected to the slope surface steel bars and anchored into the concrete surface layer of the slope; the masonry body comprises brickwork and sprayed concrete, wherein the brickwork is formed by laying hollow bricks on the structural steel bars, and the sprayed concrete is filled in the hollow bricks, so that the brickwork and the structural steel bars are connected into a whole.

[0008] In some optional embodiments, the brickwork is built by mortar laying method, and the building height is 200-300 mm, preferably the building height is 300 mm.

[0009] In some optional embodiments, the structural reinforcement is formed by reversely raising the slope reinforcement.

[0010] In some optional embodiments, the structural steel bars are embedded in the slope.

[0011] In some optional embodiments, the exterior of the brickwork is plastered and sealed with cement mortar.

[0012] In some optional embodiments, a drainage pipe is further included. The drainage pipe is arranged on the masonry body at the pit at the top of the slope, and the drainage pipe extends out of the slope surface to discharge the water in the intercepting ditch at the pit at the top of the slope to the second intercepting ditch on the slope step or the confluence trough at the bottom of the slope.

[0013] In some optional embodiments, a rainwater well is further provided at the bottom of the slope, and the rainwater well is connected to the confluence trough.

[0014] In a second aspect, a construction method for implementing the cut-off ditch structure on the top of a rock slope is provided, comprising the following steps:

[0015] Step S1, cleaning the top of the slope: remove unstable stones and foreign objects on the top of the slope, and roughly level the uneven areas. If the slope itself is unstable, it should be reinforced;

[0016] Step S2, spraying concrete surface layer on the top of the slope: first spray 8 cm thick concrete, then lay and fix tinned wire mesh, and finally spray concrete to a thickness of 12 cm. The spraying operation should be carried out from bottom to top, and spray 2 to 3 times according to the height. After the slurry is initially set, sprinkle water and cure for 7 to 10 days;

[0017] Step S3, measuring and laying out: using a level to measure the specific position of the top of the slope, and using an ink fountain to draw the edge of the ditch to ensure that it is horizontal and vertical;

[0018] Step S4, making structural steel bars: using the steel bars on the slope sprayed anchor or using the slope side embedded steel bars to form the structural steel bars of the intercepting ditch;

[0019] Step S5, brickwork: using mortar laying method, the mortar laying thickness is 30-50 mm, laying and laying at the same time, and the masonry height is 200-300 mm;

[0020] Step S6, filling the brickwork with concrete and plastering: after the masonry is completed, concrete is sprayed into the interior of the brickwork to fill the formed wall, and the exterior of the brickwork is plastered and sealed with 1:3 cement mortar;

[0021] Step S7, watering and curing: After the concrete has initially set, watering and curing are performed for 7 days.

[0022] Preferably, in step S2, a test spraying should be carried out before spraying to adjust the water-cement ratio so that the aggregate is evenly distributed and the rebound is small; the galvanized iron wire is fixed to the end of the anchor rod on the slope surface.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention constructs a brick masonry body formed by hollow bricks on the structural steel bars at the top of the slope, and sprays concrete into the brick masonry body to connect the brick masonry body and the structural steel bars into a whole to form a drainage ditch. The structure is simple and fast to construct, does not require manual trench excavation and casting mold construction, and does not require large-scale mechanical equipment for construction. It has the advantages of low cost, low construction requirements on the working surface width, and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0026] Figure 1 It is a cross-sectional view based on the excavation of the rock slope and the intercepting ditch on the top of the slope provided by the present invention;

[0027] Figure 2 yes Figure 1 A partial enlarged image is provided.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1—Structural steel bars, 2—Slope steel bars, 3—Slope concrete surface, 4—Brickwork, 5—Drainage pipe. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; the terms "install", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. 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.

[0033] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] As attached Figure 1 and attached Figure 2 As shown, this embodiment provides a drainage ditch structure based on the top of the excavated rock slope, including structural steel bars 1 and masonry bodies. The structural steel bars 1 are arranged at the top of the slope at a set interval along the direction of the slope and perpendicular to the slope surface, and are connected with the slope surface steel bars 2 and anchored in the slope surface concrete surface layer 3; Specifically, in one embodiment, as shown in the attached Figure 2 As shown, the structural steel bar is formed by the slope steel bar being reversed. This design method allows the structural steel bar and the slope steel bar to be pre-buried in the slope concrete layer as a whole; in another embodiment, the structural steel bar is an independent steel bar, which is embedded in the slope rock layer. The masonry body includes a brickwork 4 and sprayed concrete. The brickwork 4 is formed by laying hollow bricks on the structural steel bar. The brickwork is laid by the mortar laying method. The laying height is 200-300mm, and the preferred laying height is 300mm. The sprayed concrete is filled in the hollow bricks to connect the brickwork and the structural steel bar into a whole to form a drainage ditch. Finally, the brickwork is plastered and sealed with cement mortar on the outside.

[0035] In this embodiment, a brick masonry made of hollow bricks is constructed on the structural steel bars at the top of the slope, and concrete is sprayed into the brick masonry to connect the brick masonry and the structural steel bars into a whole to form a drainage ditch. The structure is simple and fast to construct, does not require manual trench excavation and casting mold construction, and does not require large-scale mechanical equipment for construction. It has the advantages of low cost, low construction requirements on the working surface width, and strong adaptability.

[0036] Preferably, as attached Figure 2As shown, it also includes a drainage pipe 5, which is arranged on the masonry body at the top pit, and the drainage pipe 5 extends out of the slope surface, and is used to discharge the water in the intercepting ditch at the top pit to the second intercepting ditch on the slope step or the confluence trough at the bottom of the slope (not shown in the figure). This design effectively prevents the problem of water accumulation in the top pit, and at the same time, the drainage pipe extends out of the slope surface, so that the discharged water will not scour the slope surface; the confluence trough at the bottom of the slope can collect the water discharged along the intercepting ditch. Preferably, a rainwater well (not shown in the figure) is also provided at the bottom of the slope, and the rainwater well is connected to the confluence trough, so that the collected water can be connected to the drainage system through the rainwater well for centralized treatment.

[0037] The implementation of the above-mentioned construction method based on the cut-off ditch structure on the top of the excavated rock slope includes the following steps:

[0038] Step S1, cleaning the top of the slope: remove unstable stones and foreign objects on the top of the slope, and roughly level the uneven areas. If the slope itself is unstable, it should be reinforced;

[0039] Step S2, spraying concrete surface layer on the top of the slope: first spray 8 cm thick concrete, then lay and fix tinned wire mesh (galvanized wire is fixed to the end of the anchor rod 6 on the slope), and finally spray concrete to a thickness of 12 cm, so that the thickness of the tinned wire mesh and the slope concrete surface layer can be guaranteed to be 4 cm. Before spraying, a test spray should be carried out to adjust the water-cement ratio, so that the aggregate is evenly distributed and the rebound is small. The spraying operation should be carried out from bottom to top, and spray 2 to 3 times according to the height. After the slurry is initially set, sprinkle water and cure for 7 to 10 days;

[0040] Step S3, measuring and laying out: using a level to measure the specific position of the top of the slope, and using an ink fountain to draw the edge of the ditch to ensure that it is horizontal and vertical;

[0041] Step S4, making structural steel bars: using the steel bars on the slope sprayed anchor or using the slope side embedded steel bars to form the structural steel bars of the intercepting ditch;

[0042] Step S5, brickwork: using mortar laying method, the mortar laying thickness is 30-50 mm, laying and laying at the same time, and the masonry height is 200-300 mm;

[0043] Step S6, filling the brickwork with concrete and plastering: after the masonry is completed, concrete is sprayed into the interior of the brickwork to fill the formed wall, and the exterior of the brickwork is plastered and sealed with 1:3 cement mortar;

[0044] Step S7, watering and curing: After the concrete has initially set, watering and curing are performed for 7 days.

[0045] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water intercepting ditch structure based on the top of the excavated rock slope, characterized by: It includes structural steel bars and masonry bodies. The structural steel bars are arranged at the top of the slope at set intervals along the direction of the slope and perpendicular to the slope surface, and are connected to the slope surface steel bars and anchored into the concrete surface layer of the slope surface. The masonry body includes brickwork and sprayed concrete. The brickwork is made of hollow bricks laid on the structural steel bars, and the sprayed concrete is filled in the hollow bricks to connect the brickwork and the structural steel bars into a whole.

2. The cut-off ditch structure based on the top of the excavated rock slope according to claim 1 is characterized by: The brickwork is built by mortar laying method, and the building height is 200-300mm.

3. The cut-off ditch structure based on the top of the excavated rock slope according to claim 1 is characterized by: The structural steel bars are formed by reversely inverting the slope steel bars.

4. The cut-off ditch structure based on the top of the excavated rock slope according to claim 1 is characterized by: The structural steel bars are embedded in the slope.

5. The cut-off ditch structure based on the top of the excavated rock slope according to claim 1 is characterized by: The exterior of the brickwork is plastered and sealed with cement mortar.

6. The cut-off ditch structure based on the top of the excavated rock slope according to claim 1 is characterized by: It also includes a drainage pipe, which is arranged on the masonry body at the pit on the top of the slope, and the drainage pipe extends out of the slope surface, and is used to discharge the water in the intercepting ditch at the pit on the top of the slope to the second intercepting ditch on the slope step or the confluence trough at the bottom of the slope.

7. The cut-off ditch structure based on the top of the excavated rock slope according to claim 6 is characterized by: A rainwater well is also provided at the bottom of the slope, and the rainwater well is connected with the confluence trough.

8. A construction method for implementing the cut-off ditch structure on the top of a cut-off rock slope according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1, cleaning the top of the slope: remove unstable stones and foreign objects on the top of the slope, and roughly level the uneven areas. If the slope itself is unstable, it should be reinforced; Step S2, spraying concrete surface layer on the top of the slope: first spray 8 cm thick concrete, then lay and fix tinned wire mesh, and finally spray concrete to a thickness of 12 cm. The spraying operation should be carried out from bottom to top, and spray 2 to 3 times according to the height. After the slurry is initially set, sprinkle water and cure for 7 to 10 days; Step S3, measuring and laying out: using a level to measure the specific position of the top of the slope, and using an ink fountain to draw the edge of the ditch to ensure that it is horizontal and vertical; Step S4, making structural steel bars: using the steel bars on the slope sprayed anchor or using the slope side embedded steel bars to form the structural steel bars of the intercepting ditch; Step S5, brickwork: using mortar laying method, the mortar laying thickness is 30-50 mm, laying and laying at the same time, and the masonry height is 200-300 mm; Step S6, filling the brickwork with concrete and plastering: after the masonry is completed, concrete is sprayed into the interior of the brickwork to fill the formed wall, and the exterior of the brickwork is plastered and sealed with 1:3 cement mortar; Step S7, watering and curing: After the concrete has initially set, watering and curing are performed for 7 days.

9. The construction method according to claim 8, characterized in that: In step S2, a test spraying should be carried out before spraying to adjust the water-cement ratio so that the aggregate is evenly distributed and the rebound is small; the galvanized iron wire is fixed to the end of the anchor rod on the slope surface.

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