Blasting method for construction diversion middle dike
By arranging gently angled inclined holes at the bottom of the central dike and controlling the depth of the blast holes and the detonation sequence, the problem of residual material at the toe of the slope in traditional central dike blasting was solved, achieving complete demolition of the central dike and improving the construction progress.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA RAILWAY GUANGZHOU ENG GRP CO LTD
- Filing Date
- 2025-12-30
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional blasting methods for dikes often result in incompletely broken debris (heel) at the slope toe, increasing project costs and slowing down construction progress.
Two rows of gently angled blast holes were arranged at the bottom of the slope near the dry area of the central dike. The depth of the blast holes and the detonation sequence were controlled to ensure that the blasting energy was concentrated at the bottom of the central dike and the toe of the slope. By detonating the top blast holes first and then the bottom blast holes, the pressure relief and energy transfer of the blasting were achieved from top to bottom.
This completely eliminated the rock mass at the toe of the slope that was difficult to break using traditional methods, reduced construction costs, ensured the complete removal of the central dike, and enabled the rapid completion of the construction schedule.
Smart Images
Figure CN122015597A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of blasting construction, and in particular to a method for blasting a dike during construction diversion. Background Technology
[0002] In infrastructure construction such as water conservancy projects and waterway improvement, it is often necessary to modify existing river channels and water systems to meet flood control, navigation, or land use requirements, such as straightening bends, widening, or deepening. These projects typically involve earthwork excavation in underwater or adjacent water areas. To ensure the smooth flow of the existing water system during construction, while also considering construction costs, environmental protection, and land use efficiency, the industry commonly adopts a phased diversion construction scheme. The core of this scheme is to divide the river channel into three phases, creating dry-land construction conditions by constructing a central dike as a water-retaining structure.
[0003] Reference Figure 1 In the phased diversion construction, the central dike serves as a temporary water-retaining structure. After the completion of the first phase, it is used to retain water. The area after the completion of the first phase is the diversion flow area, and the area formed after the completion of the second phase is the dry area. The diversion flow area and the dry area excavation area are located on both sides of the central dike, respectively. The third phase of construction requires the dismantling of the central dike.
[0004] Currently, the demolition of the central dike commonly employs blasting. Traditional blasting techniques typically involve drilling vertical blast holes at the top of the dike. However, in practice, due to the distribution of blasting energy and geological conditions, this method often leaves incompletely broken and removed debris at the toe of the dike, known as a "shallow spot." This debris requires subsequent blasting using blasting vessels, increasing costs and slowing down the overall construction progress. Therefore, improvements are needed. Summary of the Invention
[0005] In order to facilitate the dismantling of the central dike, reduce project costs, and ensure the overall construction progress, this application provides a method for blasting the central dike for construction diversion.
[0006] The technical solution for the blasting method of the diversion embankment in the construction diversion process provided in this application is as follows: A method for blasting a diversion embankment during construction includes the following specific steps: S1, measuring the terrain to determine the detailed shape of the diversion embankment; S2, laying out blast holes, arranging two rows of gently angled inclined holes at the bottom of the slope near the dry area of the diversion embankment, the depth of the gently angled inclined holes being determined according to the measured terrain, and the spacing between the two rows of gently angled inclined holes being between 1.3m and 1.7m; vertical holes and top inclined holes are arranged at the top of the diversion embankment according to the slope of the diversion embankment, with the bottom of the holes controlled at a distance of [missing information - likely a number] meters from the bottom. The second row of blast holes is 1.8m to 2.2m deep; S3, drilling: through-hole drilling equipment is used to drill the gentle-angle inclined holes, vertical holes, and top inclined holes in sequence; S4, charging: explosives are placed in each gentle-angle inclined hole, vertical hole, and top inclined hole; S5, plugging: the openings of each gentle-angle inclined hole, vertical hole, and top inclined hole are plugged; S6, detonation: the explosives in each blast hole of the central dike are connected, and then the blast holes at the top of the central dike are detonated first, followed by the blast holes at the bottom of the central dike.
[0007] By adopting the above technical solution, two rows of gently angled blast holes are arranged at the bottom of the slope near the dry area of the central dike, allowing the blasting energy to be more concentrated and fully applied to the bottom of the dike and the toe area, especially the rock and soil below the toe. This achieves thorough fragmentation of the area and avoids the shallow-point effect (heel strike) caused by insufficient blasting at the toe of traditional vertical blast holes. Simultaneously, by controlling the bottom of the blast holes at the top of the dike to be 1.8m to 2.2m away from the second row of blast holes at the bottom, and arranging the top blast holes to detonate before the bottom blast holes, it is easier to achieve top-to-bottom blasting pressure relief and energy transfer. This creates a free face for the bottom blasting, further improving the fragmentation effect of the bottom rock and soil, ensuring the complete demolition of the central dike without the need for subsequent underwater shallowing and blasting operations. This helps reduce construction costs and quickly achieve the demolition of the central dike, ensuring the overall construction progress.
[0008] Optionally, in step S2, the opening of the first row of gently angled inclined holes near the bottom is located on the toe line of the central dike, the vertical position of the bottom of the hole is 2m to 3m below the toe line of the opposite slope, and the horizontal position of the bottom of the hole is about 1.7m to 2.2m above the toe line of the opposite slope; the vertical position of the bottom of the second row of gently angled inclined holes near the bottom is at the height of the toe line of the opposite slope, and the horizontal position of the bottom of the hole is 1.7m to 2.2m away from the toe line of the opposite slope.
[0009] By adopting the above technical solution, the spatial position of the two rows of gently angled inclined holes is precisely controlled. In particular, it is ensured that the bottom of the first row of gently angled inclined holes, i.e. the first row of blast holes, is deeply inserted and extends beyond the opposite slope toe line. This facilitates the elimination of the rock mass at the root of the slope toe, which is difficult to break using traditional methods, after blasting, thus fundamentally eliminating the root toe. At the same time, the second row of gently angled inclined holes, i.e. the second row of blast holes, supplements the top of the first row of blast holes, thereby synergistically covering the entire bottom area of the central dike and achieving comprehensive blasting of the root toe area.
[0010] Optionally, in step S2, a row of dry ground inclined holes is arranged at the bottom of the dry area, 1.4m to 1.6m away from the toe line of the central dike, with the bottom of the dry ground inclined holes located at the bottom of the central dike.
[0011] By adopting the above technical solution, the setting of the dry-land inclined holes facilitates the supplementation of the bottom of the first row of blast holes, thereby further covering the bottom area of the central dike near the dry area, further realizing the comprehensive blasting of the base area, and ensuring the complete demolition of the central dike by blasting.
[0012] Optionally, in step S3, if water leakage occurs during the drilling of the gentle-angle inclined hole, the drill is withdrawn, and then a water-absorbing expansion component is filled to stop the leakage. After the leakage in the gentle-angle inclined hole stops, drilling continues. After drilling is completed, a PVC sleeve is installed in the gentle-angle inclined hole.
[0013] By adopting the above technical solution, the water-absorbing expansion component facilitates rapid leak sealing. At the same time, after drilling is completed, the PVC sleeve facilitates the protection of the explosives inside the borehole, allowing the explosives to be smoothly loaded into the designed position and avoiding moisture failure, thereby ultimately achieving a uniform and sufficient release of blasting energy.
[0014] Optionally, in step S4, when placing explosives in the vertical holes and the top inclined holes, the explosives are pre-connected by leads and the interval between adjacent explosives is set. Then, the explosives are sequentially hoisted into each vertical hole and the top inclined hole.
[0015] By adopting the above technical solution, the explosives are pre-connected on the ground and the intervals are set, which realizes the standardization and prefabrication of the explosive loading of the blast holes on the top of the dike. This helps to ensure the accurate position and reliable connection of the explosives in the vertical holes and the top inclined holes, and ensures the stability of the detonation network. In addition, the vertical holes and the top inclined holes have a large inclination, which facilitates the rapid lowering of the explosives.
[0016] Optionally, in step S4, when filling the explosive into the gently angled hole, the explosive is pre-connected by a lead wire and the interval between adjacent explosives is set. Then, the explosive is placed by a feeding rod. The feeding rod includes a rod body, a feeding component, and a receiving component. The cross-section of the rod body is arc-shaped. The feeding component is located near one end of the rod body. The feeding component passes through and slides against the inner wall of the rod body. The receiving component is used to drive the feeding component to collect or release the explosive. When the rod body places the explosive, the bottom explosive is fixed to the feeding component by adhesive.
[0017] By adopting the above technical solution, the problem of accurate and continuous placement of explosives due to insufficient gravity and frictional resistance during the loading of explosives in the gently angled hole is effectively solved. The feeder that can be driven to store or release facilitates the active grasping and controllable release of the bottom explosive, thereby achieving active and stable transportation of the entire explosive. This helps to ensure the continuity and placement accuracy of the explosive in the gently angled hole, so that the blasting energy of the borehole can be released as preset.
[0018] Optionally, the receiving component includes a top spring, a receiving rope, and a receiving roller. The top spring is disposed between the rod and the feeding component and applies a release force to the feeding component. The receiving roller is rotatably mounted on the rod and located at the free end of the rod away from the feeding component. One end of the receiving rope is connected to the feeding component, and the other end is connected to the receiving roller.
[0019] By adopting the above technical solution, the receiving roller can collect or release the receiving part under the elastic force of the top spring, which is convenient and quick to operate. It is convenient to collect the feeding part after the explosive is installed in the gently angled hole, and then remove the rod from the gently angled hole by rotating the rod as a whole, so as to realize the recycling of the rod as a whole.
[0020] Optionally, the rod body is provided with a limiting component, which includes a limiting ratchet and a limiting pawl. The limiting ratchet is coaxially fixedly installed on the receiving roller, and the limiting pawl is rotatably installed on the rod body and engages with the limiting ratchet.
[0021] By adopting the above technical solution, the rotating take-up roller winds the take-up rope to achieve reliable one-way locking during the take-up of the feeder, thereby preventing the feeder from retracting and releasing, and further ensuring the stability of the explosive string when it is conveyed in the gently angled hole.
[0022] Optionally, the limiting assembly further includes a limiting spring, one end of which is connected to the rod and the other end to the limiting pawl. The limiting spring applies a spring force to the limiting pawl, causing it to move closer to the limiting ratchet. One end of the receiving roller passes through the rod and is fixedly connected to a handwheel.
[0023] By adopting the above technical solution, the handwheel is designed to facilitate the application of force to rotate the take-up roller, and the elastic force of the limit spring helps to further ensure the unidirectional locking stability of the limit pawl on the limit ratchet and the take-up roller.
[0024] Optionally, the rod body includes a movable part and a fixed part. The movable part passes through and slides into the fixed part. The movable part is fixed to the fixed part by a bolt that is threaded into the fixed part and tightens itself. The feeding component is located at the free end of the movable part away from the fixed part, and the receiving component is located at the free end of the fixed part away from the movable part.
[0025] By adopting the above technical solution, the setting of the movable part and the fixed part enables the feeding rod to have the function of telescopic adjustment, which makes it easy to adapt to the needs of loading medicine in the angled hole at different depths. It has strong applicability, and the bolt clamping and fixing method makes it easy to fix quickly after the rod is telescopically adjusted, ensuring the stability of the rod after telescopic adjustment.
[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Arranging the top blast holes to detonate before the bottom blast holes in the detonation sequence facilitates the decompression and energy transfer of the blasting from top to bottom. This allows the top blasting to create a free face for the bottom blasting, further improving the fragmentation effect of the bottom rock and soil. This ensures the complete demolition of the central dike without the need for subsequent underwater shoveling and blasting operations. It helps reduce construction costs and quickly achieve the demolition of the central dike, ensuring the overall construction progress.
[0027] 2. The bottom of the first row of blast holes is deeply inserted and extends beyond the toe line of the opposite slope, which facilitates the elimination of the rock mass at the root of the slope that is difficult to break using traditional methods after blasting, thus fundamentally eliminating the root. The second row of blast holes supplements the top of the first row of blast holes, thereby synergistically covering the entire bottom area of the central dike and achieving comprehensive blasting of the root area.
[0028] 3. The use of water-absorbing expansion components facilitates rapid leak sealing. Furthermore, the PVC sleeve installed after drilling protects the explosives inside the borehole, ensuring smooth loading of the explosives to the designed position and preventing moisture-induced failure, ultimately achieving a uniform and sufficient release of blasting energy. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the second phase of the segmented diversion construction in the background technology.
[0030] Figure 2 This is a schematic diagram of the layout of the blast holes in an embodiment of this application.
[0031] Figure 3 This is a schematic diagram of the feeding rod in an embodiment of this application.
[0032] Figure 4 This is a partial cross-sectional schematic diagram of the active part in an embodiment of this application.
[0033] Figure 5 This is a partial cross-sectional schematic diagram of the fixing part in an embodiment of this application.
[0034] Figure 6 yes Figure 5 A magnified view of part A in the diagram.
[0035] Explanation of reference numerals in the attached figures: 1. Central embankment; 2. Water diversion zone; 3. Dry area; 4. Gradual angled hole; 5. Vertical hole; 6. Top angled hole; 7. Dry area angled hole; 8. Feeding rod; 81. Rod body; 811. Moving part; 812. Fixed part; 82. Feeding component; 83. Receiving component; 831. Top spring; 832. Receiving rope; 833. Receiving roller; 9. Feeding trough; 10. Handwheel; 11. Limiting ratchet; 12. Limiting pawl; 13. Limiting spring; 14. Fixed cylinder. Detailed Implementation
[0036] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.
[0037] This application discloses a method for blasting a dike during construction diversion. (Refer to...) Figure 1 and Figure 2 The blasting method for the diversion embankment during construction includes the following specific steps: S1, measuring the terrain, determining the detailed shape of the diversion embankment 1, and forming a topographic map and a three-dimensional model.
[0038] Reference Figure 2 S2, Arrange blast holes. Two rows of gently angled inclined holes 4 are arranged at the bottom of the slope of the central dike 1 near the dry area 3. The depth of the gently angled inclined holes 4 is determined according to the measured terrain. The hole spacing between the two rows of gently angled inclined holes 4 is between 1.3m and 1.7m. In this embodiment, it is specifically selected as 1.5m. Vertical holes 5 and top inclined holes 6 are arranged at the top of the central dike 1 according to the slope of the central dike 1. The bottom of the holes is controlled at 1.8m to 2.2m from the bottom second row of blast holes. In this embodiment, it is specifically selected as 2m.
[0039] Continue to refer to Figure 2 Furthermore, the openings of the first row of gently angled inclined holes 4 near the bottom are located on the toe line of the central dike 1, the vertical position of the bottom of the hole is 2m to 3m below the toe line of the opposite slope, and the horizontal position of the bottom of the hole exceeds the toe line of the opposite slope by about 1.7m to 2.2m. In this embodiment, the vertical position of the bottom of the hole is 3m below the toe line of the opposite slope, and the horizontal position of the bottom of the hole exceeds the toe line of the opposite slope by about 2m. The vertical position of the bottom of the second row of gently angled inclined holes 4 near the bottom is at the height of the toe line of the opposite slope, and the horizontal position of the bottom of the hole is 1.7m to 2.2m away from the toe line of the opposite slope. In this embodiment, the horizontal position of the bottom of the hole is 2m away from the toe line of the opposite slope.
[0040] Continue to refer to Figure 2In addition, a row of dry-land inclined holes 7 is arranged at a distance of 1.4m to 1.6m from the toe of the central dike 1 at the bottom of the dry area 3. In this embodiment, the distance is specifically selected as 1.5m. The bottom of the dry-land inclined holes 7 is located at the bottom of the central dike 1, and the angle between the dry-land inclined holes 7 and the horizontal direction is between 45 and 80 degrees. In this embodiment, the angle is specifically selected as 60 degrees. This is to ensure that the toe of the central dike 1 on both sides can be completely demolished by explosive blasting in each blast hole.
[0041] S3, Drilling, the through-hole drilling equipment sequentially drills the gentle angle inclined hole 4, the vertical hole 5, the top inclined hole 6, and the dry ground inclined hole 7.
[0042] Furthermore, when water leakage occurs during the drilling of the gentle-angle inclined hole 4, the drill is withdrawn, and then a water-absorbing expansion component is filled to stop the leakage. After the water leakage in the gentle-angle inclined hole 4 stops, drilling continues. After the drilling is completed, a PVC sleeve is installed in the gentle-angle inclined hole 4 to protect the explosives subsequently filled into the gentle-angle inclined hole 4. In this embodiment, the water-absorbing expansion component is selected as dried kelp.
[0043] S4, charge the explosives, placing them in the gently angled holes 4, vertical holes 5, top angled holes 6, and dry ground angled holes 7.
[0044] When placing explosives in the vertical holes 5, the top inclined holes 6, and the dry ground inclined holes 7, the explosives are pre-connected with leads, and the interval between adjacent explosives is set. Then, the explosives are sequentially hoisted into each of the vertical holes 5 and the top inclined holes 6. The vertical holes 5, the top inclined holes 6, and the dry ground inclined holes 7 have a large inclination, and the dry ground inclined holes 7 are relatively shallow, which facilitates the rapid lowering of the explosives.
[0045] Reference Figure 3 and Figure 4 When filling the inclined hole 4 with explosives, the explosives are pre-connected by leads and the spacing between adjacent explosives is set. Then, the explosives are placed by the feeding rod 8. Specifically, the feeding rod 8 includes a rod body 81, a feeding component 82, and a receiving component 83. The cross-section of the rod body 81 is arc-shaped. In this embodiment, the rod body 81 includes a movable part 811 and a fixed part 812. The movable part 811 passes through and slides into the fixed part 812. The movable part 811 is fixed to the fixed part 812 by a bolt that is threaded into the fixed part 812 and tightens itself, so as to realize the adjustment of the length of the rod body 81.
[0046] Reference Figure 4 and Figure 5The feeding component 82 is located at the free end of the movable part 811 away from the fixed part 812. The cross-section of the feeding component 82 is also arc-shaped. An arc-shaped feeding groove 9 is opened on the inner wall of the rod body 81. One end of the feeding component 82 passes through and slides into the feeding groove 9 of the rod body 81. The receiving component 83 is used to drive the feeding component 82 to receive or release it. When the rod body 81 is used to place the explosive, the bottom explosive is fixed to the feeding component 82 by adhesive. After the explosive is installed in the gently angled hole 4, the receiving component 83 receives the feeding component 82. Then, by rotating the rod body 81 as a whole, it is easy to take the rod body 81 out of the gently angled hole 4, which facilitates the subsequent recycling of the rod body 81 as a whole.
[0047] Continue to refer to Figure 4 and Figure 5 The receiving component 83 includes a top spring 831, a receiving rope 832, and a receiving roller 833. The top spring 831 is disposed in the feeding trough 9, with one end fixedly connected to the wall of the feeding trough 9 and the other end connected to the feeding component 82, so as to apply a spring force to the feeding component 82 in the direction away from the feeding trough 9, i.e., release. The receiving roller 833 is horizontally rotatably mounted on the rod body 81 and located at the free end of the fixed part 812 away from the feeding component 82. One end of the receiving rope 832 is connected to the feeding component 82 and the other end is connected to the receiving roller 833. The receiving roller 833 passes through and slides in cooperation with the movable part 811 and the fixed part 812, so that when the receiving roller 833 rotates, it cooperates with the spring force of the top spring 831 to realize the receiving and release of the feeding component 82. To facilitate the application of force to rotate the take-up roller 833, one end of the take-up roller 833 passes through the fixed part 812 of the rod body 81 and is fixedly connected to a handwheel 10.
[0048] Reference Figure 5 and Figure 6 Furthermore, a limiting assembly is provided on the outer side of the fixing part 812 of the rod 81. The limiting assembly includes a limiting ratchet 11, a limiting pawl 12, and a limiting spring 13. A fixing cylinder 14 is fixedly provided on the outside of the fixing part 812. The receiving roller 833 is coaxially inserted and rotatably engaged with the fixing cylinder 14. The limiting ratchet 11 is coaxially fixedly installed on the receiving roller 833. The limiting pawl 12 is rotatably installed on the fixing cylinder 14 of the rod 81 and engages with the limiting ratchet 11. One end of the limiting spring 13 is connected to the fixing cylinder 14 of the rod 81, and the other end is connected to the limiting pawl 12. The limiting spring 13 applies a spring force to the limiting pawl 12, causing it to move closer to the limiting ratchet 11, so that the receiving roller 833 rotates and winds the receiving rope 832, thereby achieving one-way locking during the receiving of the feeding component 82, preventing the feeding component 82 from retracting and releasing, and facilitating the stability of the explosive string when conveyed in the gently angled hole 4.
[0049] S5, Blocking: The openings of each gentle-angled inclined hole 4, vertical hole 5, top inclined hole 6, and dry-ground inclined hole 7 are blocked to ensure that the explosive energy can be fully released in each blast hole.
[0050] S6, Detonation: Connect the explosives in each blast hole of the central dike 1, then detonate the blast holes at the top of the central dike 1 first, followed by the blast holes at the bottom. This is to create a free face for the bottom blast after the top of the central dike 1 is blasted, ensuring a sufficient fragmentation effect on the bottom rock and soil.
[0051] The implementation principle of the blasting method for the diversion embankment in this application embodiment is as follows: By arranging two rows of gently angled inclined holes 4 and dry-ground inclined holes 7 at the bottom of the slope near the dry area 3 of the diversion embankment 1, the blasting energy can be more concentrated and fully applied to the bottom and toe areas of the diversion embankment 1, especially the rock and soil below the toe, thereby achieving sufficient fragmentation of the area and avoiding the shallow spots (shallow spots) formed by insufficient blasting action at the toe of the slope due to traditional vertical blasting holes. At the same time, by controlling the distance between the bottom holes of the top blasting holes of the diversion embankment 1 and arranging the top blasting holes to detonate before the bottom blasting holes in the detonation sequence, it is convenient to achieve top-to-bottom blasting pressure relief and energy transfer, so that the top blasting creates a free surface for the bottom blasting, further improving the fragmentation effect of the bottom rock and soil, ensuring the complete demolition of the diversion embankment 1 by blasting, eliminating the need for subsequent underwater sweeping and blasting operations, which helps to reduce construction costs and quickly achieve the demolition of the diversion embankment 1, ensuring the overall construction progress.
[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A method for blasting a dike during construction diversion, characterized in that: The specific steps include: S1, measuring the terrain and determining the detailed shape of the central dike (1); S2, Arrange blast holes. Arrange two rows of gently angled inclined holes (4) at the bottom of the slope of the central dike (1) near the dry area (3). The depth of the gently angled inclined holes (4) is determined according to the measured topography. The hole spacing between the two rows of gently angled inclined holes (4) is between 1.3m and 1.7m. Arrange vertical holes (5) and top inclined holes (6) at the top of the central dike (1) according to the slope of the central dike (1). The bottom of the holes is controlled to be 1.8m to 2.2m away from the second row of blast holes at the bottom. S3, Drilling, through hole drilling equipment drills the gentle angle inclined hole (4), vertical hole (5) and top inclined hole (6) in sequence; S4, charge the explosives, and place the explosives in each of the gently angled holes (4), the vertical holes (5) and the top angled hole (6); S5, Blocking, sealing the openings of each gently angled inclined hole (4), vertical hole (5) and top inclined hole (6); S6, detonate, connect the explosives in each blast hole of the central dike (1), then first detonate the blast holes at the top of the central dike (1), and then detonate the blast holes at the bottom of the central dike (1).
2. The method for blasting a dike during construction diversion according to claim 1, characterized in that: In step S2, the opening of the first row of gently angled inclined holes (4) near the bottom is located on the toe line of the central dike (1), the vertical position of the bottom of the hole is 2m to 3m below the toe line of the opposite slope, and the horizontal position of the bottom of the hole is about 1.7m to 2.2m above the toe line of the opposite slope; the vertical position of the bottom of the second row of gently angled inclined holes (4) near the bottom is at the height of the toe line of the opposite slope, and the horizontal position of the bottom of the hole is 1.7m to 2.2m away from the toe line of the opposite slope.
3. The method for blasting a dike during construction diversion according to claim 2, characterized in that: In step S2, a row of dry ground inclined holes (7) is arranged at the bottom of the dry area (3) at a distance of 1.4m to 1.6m from the toe of the central dike (1), and the bottom of the dry ground inclined holes (7) is located at the bottom of the central dike (1).
4. The method for blasting a dike during construction diversion according to claim 1, characterized in that: In step S3, when water leakage occurs during the drilling of the angled hole (4), the drill is withdrawn, and then a water-absorbing expansion component is filled to stop the leakage. After the water leakage in the angled hole (4) stops, the drilling continues. After the drilling is completed, a PVC sleeve is installed in the angled hole (4).
5. The method for blasting a dike during construction diversion according to claim 1, characterized in that: In step S4, when placing explosives in the vertical holes (5) and the top inclined holes (6), the explosives are connected in advance by leads and the interval between adjacent explosives is set. Then the explosives are hoisted into each vertical hole (5) and the top inclined holes (6) in sequence.
6. The method for blasting a dike during construction diversion according to claim 1, characterized in that: In step S4, when filling the explosive into the gently angled hole (4), the explosive is pre-connected by a lead wire and the interval between two adjacent explosives is set. Then, the explosive is placed by the feeding rod (8). The feeding rod (8) includes a rod body (81), a feeding component (82), and a receiving component (83). The cross-section of the rod body (81) is arc-shaped. The feeding component (82) is set near one end of the rod body (81). The feeding component (82) passes through and slides against the inner wall of the rod body (81). The receiving component (83) is used to drive the feeding component (82) to collect or release the explosive. When the rod body (81) places the explosive, the bottom explosive is fixed to the feeding component (82) by adhesive bonding.
7. The method for blasting a dike during construction diversion according to claim 6, characterized in that: The receiving component (83) includes a top spring (831), a receiving rope (832), and a receiving roller (833). The top spring (831) is disposed between the rod (81) and the feeding component (82) and applies a release force to the feeding component (82). The receiving roller (833) is rotatably mounted on the rod (81) and located at the free end of the rod (81) away from the feeding component (82). One end of the receiving rope (832) is connected to the feeding component (82), and the other end is connected to the receiving roller (833).
8. The method for blasting a dike during construction diversion according to claim 7, characterized in that: The rod body (81) is provided with a limiting component, which includes a limiting ratchet (11) and a limiting pawl (12). The limiting ratchet (11) is coaxially fixedly installed on the receiving roller (833), and the limiting pawl (12) is rotatably installed on the rod body (81) and meshes with the limiting ratchet (11).
9. The method for blasting a dike during construction diversion according to claim 8, characterized in that: The limiting assembly also includes a limiting spring (13), one end of which is connected to the rod (81) and the other end is connected to the limiting pawl (12). The limiting spring (13) applies a spring force to the limiting pawl (12) to move towards the limiting ratchet (11). One end of the receiving roller (833) passes through the rod (81) and is fixedly connected to a handwheel (10).
10. A method for blasting a dike during construction diversion according to claim 6, characterized in that: The rod (81) includes a movable part (811) and a fixed part (812). The movable part (811) passes through and slides into the fixed part (812). The movable part (811) is fixed to the fixed part (812) by a bolt that is threaded into the fixed part (812) and tightens itself. The feeding part (82) is located at the free end of the movable part (811) away from the fixed part (812). The receiving part (83) is located at the free end of the fixed part (812) away from the movable part (811).