A method for sealing water curtain during anchor rod construction
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING YANTU ENG KANCHAYUAN
- Filing Date
- 2023-12-16
- Publication Date
- 2026-05-29
Smart Images
Figure CN117779815B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of anchor bolt construction technology, and in particular to a method for sealing water-stop curtains during anchor bolt construction. Background Technology
[0002] The residential foundation pit support project has a high groundwater level, requiring the construction of a support structure around the pit. This support structure primarily consists of a top soil nailing wall combined with pile anchors, ultimately forming a water-stop curtain. Once completed, the water-stop curtain closes off the perimeter of the pit. After closure, groundwater control methods are used to operate drainage wells within the pit to drain the groundwater. Then, earthwork excavation creates a height difference between the inside and outside of the pit, increasing the water pressure outside the water-stop curtain. The groundwater control method employs a three-axis mixing water-stop curtain pile seal outside the support structure, supplemented by drainage wells, emergency wells, and drainage ditches inside and outside the pit to drain groundwater and perched water within the curtain and treat slope seepage.
[0003] However, anchor bolts need to penetrate the water-stop curtain during construction. When anchor bolts penetrate the water-stop curtain, they will create drainage holes, leading to a large amount of water leakage on the slope of the foundation pit and a rapid drop in the groundwater level around the foundation pit. The drop in the groundwater level will cause changes in groundwater pressure, changes in pore water stress in the soil layer, changes in the effective stress of the soil layer skeleton, redistribution and adjustment of the original soil density, and re-compaction of the soil layer, resulting in ground settlement. Groundwater seepage outside the curtain will affect subsequent construction, the safety and stability of the support structure, and the settlement of surrounding existing buildings. Summary of the Invention
[0004] In order to quickly seal anchor bolt holes and reduce the impact of water leakage from anchor bolt holes on the settlement of existing buildings, this application provides a method for sealing with a water-stop curtain during anchor bolt construction.
[0005] This application provides a method for sealing a water-stop curtain during anchor bolt construction, which adopts the following technical solution:
[0006] A method for sealing water-stop curtains during anchor bolt construction, the construction steps are as follows:
[0007] The locations of the anchor bolt holes are determined based on the water levels inside and outside the foundation pit. The anchor bolt working surfaces are located above the water level inside the foundation pit.
[0008] The drilling rig is positioned to drill anchor bolt holes. A double-casing drilling rig is used to drill the holes. High-pressure water can be used to impact the sand and gravel layer at the hole location when drilling anchor bolt holes.
[0009] Place the anchor bolt into the anchor bolt hole;
[0010] After the anchor bolt installation is completed, a simple sealing treatment is performed at the anchor bolt hole opening;
[0011] Perform grouting once, grouting the anchor bolt near the bottom of the anchor bolt hole;
[0012] Secondary grouting is performed, injecting quick-setting, leak-proof water-stopping material through a conduit within a 1m range from the anchor bolt hole to the outside of the water-stop curtain.
[0013] Then, dry kelp was quickly stuffed into the water-stop curtain area inside the anchor bolt hole;
[0014] The top of the anchor rods near the foundation pit were sealed and secured again.
[0015] By adopting the above technical solution, the drilling position of the double-casing casing drilling rig facilitates the removal of loose sand and gravel from between the outer and inner casings. After drilling, simple sealing treatment is immediately carried out, followed by grouting. After the first grouting, the anchor bolt holes at the water-stop curtain are sealed by utilizing the properties of water-proof rapid solidification and the expansion of dried kelp upon contact with water. Secondary grouting is then performed to achieve the purpose of rapid leak sealing. Finally, the anchor bolt hole opening is sealed and fixed, thereby achieving rapid sealing of the anchor bolt holes and reducing the impact of water leakage from the anchor bolt holes on the settlement of existing buildings.
[0016] Optionally, when the anchor rod is placed in the anchor rod hole, a sealing assembly is provided around the anchor rod. The sealing assembly includes a grouting component and a sealing component. The sealing component is coaxially disposed at one end of the anchor rod. One end of the grouting component passes through the sealing component and is placed into the anchor rod hole together with the end of the anchor rod away from the sealing component. The grouting component and the sealing component are detachably connected. The sealing component is used to seal the opening of the anchor rod hole, and the grouting component is used to inject quick-setting leak-proof water into the anchor rod hole.
[0017] By adopting the above technical solution, when the anchor rod is fixed in the anchor rod hole, the anchor rod and the grouting component are put in together. The sealing component seals the anchor rod hole opening, and the grouting component injects quick-setting leak-proof water into the anchor rod hole. The sealing component seals the anchor rod hole opening, quickly sealing the anchor rod hole and reducing the impact of water leakage from the anchor rod hole on the settlement of existing buildings.
[0018] Optionally, the sealing component includes a sealing element and an expansion element. The sealing element and the expansion element are coaxially connected to the anchor rod. The peripheral sidewall of the sealing element fits into the anchor rod hole. The expansion element is located at the end of the sealing element near the bottom of the anchor rod hole. A placement groove is provided at the end of the expansion element away from the sealing element, and dried kelp is placed in the placement groove.
[0019] By adopting the above technical solution, the sealing component seals the anchor bolt hole, and the expansion component contains dried kelp. The dried kelp expands inside the expansion component, and the characteristic of dried kelp to expand when it comes into contact with water seals the anchor bolt hole, thereby achieving rapid leak sealing and reducing the impact of water leakage from the anchor bolt hole on the settlement of existing buildings.
[0020] Optionally, the expansion member is made of dried kelp.
[0021] By adopting the above technical solution, the dried kelp inside the expansion component can expand when it comes into contact with water, and the expansion component can also expand, thereby improving the sealing of the anchor bolt hole.
[0022] Optionally, the sealing member is provided with a reinforcing rod at one end near the expansion member, and the reinforcing rod is provided with multiple reinforcing spikes.
[0023] By adopting the above technical solution, when the quick-setting and leak-proof water-stopping agent is injected into the anchor bolt hole, the reinforcing rod can be fixed to the quick-setting and leak-proof water-stopping agent, thereby improving the strength of the anchor bolt in the anchor bolt hole.
[0024] Optionally, the reinforcing rod is slidably connected to the sealing component. The sealing component includes a sealing disc and a sealing ring located at the end of the sealing disc near the expansion member. The end of the sealing ring near the reinforcing rod has a groove, and the end of the reinforcing rod near the groove has a slider. The slider is located in the groove and can slide along the groove. The sliding direction of the slider is towards or away from the axis of the anchor rod. A pressure block is also provided in the groove near the slider. One end of the pressure block abuts against the slider, and the other end has a pressure rod. The pressure rod is slidably connected to the sealing disc. The sliding direction of the pressure rod is the same as the axis of the anchor rod. The pressure block is used to move the slider away from the anchor rod.
[0025] By adopting the above technical solution, in order to make the reinforcing spikes on the reinforcing rod contact the wall of the anchor bolt hole, the pressure rod is pressed towards the anchor bolt hole. The pressure rod drives the pressure block to slide in the groove until the pressure block is away from the axis of the anchor bolt. This allows the pressure block to drive the reinforcing rod closer to the wall of the anchor bolt hole. Then, a quick-setting leak-proof water sealant is injected to strengthen the contact strength between the reinforcing rod and the wall of the anchor bolt hole.
[0026] Optionally, the expansion component includes an expansion disc and a limiting cylinder located at the end of the expansion disc away from the sealing disc. The peripheral sidewall of the expansion disc is fitted with the inner sidewall of the sealing ring, and the inner sidewall of the limiting cylinder is fitted with the outer sidewall of the anchor rod, and the limiting cylinder is provided with multiple water-permeable holes.
[0027] By adopting the above technical solution, the dried kelp is placed between the limiting cylinder and the expansion ring, and the water-permeable holes facilitate the expansion of the dried kelp placed between the limiting cylinder and the expansion ring when it comes into contact with water.
[0028] Optionally, the end of the limiting cylinder away from the expansion disc protrudes into the sealing ring.
[0029] By adopting the above technical solution, the end of the limiting cylinder located inside the anchor bolt hole protrudes from the sealing ring, reducing the possibility of dried kelp falling out of the limiting cylinder.
[0030] Optionally, the grouting component includes a grouting pipe, a grouting head, and a quick connector. One end of the grouting pipe protrudes from the sealing plate and expansion plate near the bottom of the anchor hole, and the other end is connected to the quick connector. The quick connector is used to quickly connect the grouting pipe to the grouting machine. The grouting head is connected to the end of the grouting pipe near the bottom of the anchor hole. The diameter of the grouting head is larger than that of the grouting pipe. The expansion plate has a first clearance hole near the grouting pipe, and the diameter of the first clearance hole is the same as that of the grouting head. The sealing plate has a second clearance hole near the grouting pipe, and the diameter of the second clearance hole is the same as that of the grouting pipe.
[0031] By adopting the above technical solution, the quick connector can quickly connect the grouting pipe to the grouting machine. During grouting, the grouting pipe is pulled out of the anchor bolt hole along with the amount of grout injected until the grouting head passes through the first clearance hole on the expansion plate and abuts against the sealing plate. The diameter of the second clearance hole is the same as the diameter of the grouting pipe, which restricts the grouting head from being pulled out of the sealing plate. This allows the grouting pipe to pull the sealing plate away from the anchor bolt hole when it is pulled out, making it easier to fill the anchor bolt hole with other sealing materials or to reseal the anchor bolt hole.
[0032] Optionally, a sealing assembly is also provided at the anchor bolt hole. The sealing assembly includes a sealing block, a fixing frame, and a sealing cylinder. One end of the sealing block is located inside the anchor bolt hole, and the other end is connected to the water-stop curtain. The fixing frame is connected to the end of the sealing block away from the anchor bolt hole. The sealing cylinder is sleeved around the anchor bolt. One end of the sealing cylinder protrudes from the side of the sealing block located inside the anchor bolt hole, and the other end protrudes from the side of the fixing frame away from the sealing block. The sealing cylinder is used to fill and seal the gap between the anchor bolt and the sealing block.
[0033] By adopting the above technical solution, the sealing block seals the anchor bolt hole, the fixing frame is used to fix the sealing cylinder, and the sealing cylinder fills and seals the gap between the anchor bolt and the sealing block and the fixing frame again, reducing the possibility of water leakage from the anchor bolt hole.
[0034] In summary, this application includes at least one of the following beneficial technical effects:
[0035] 1. During secondary grouting, quick-setting leak-proof type water-stopping agent is injected through a conduit within 1m of the anchor bolt hole to the outside of the water-stop curtain. Then, dry kelp is quickly stuffed into the water-stop curtain area inside the anchor bolt hole. The rapid solidification of the water-stopping agent and the expansion of the dry kelp upon contact with water are used to seal the anchor bolt hole at the water-stop curtain, achieving the purpose of rapid leak sealing. This reduces the impact of water leakage from the anchor bolt hole on the settlement of the existing building.
[0036] 2. By installing a sealing component at the anchor bolt hole, the sealing component can seal the anchor bolt hole and simultaneously inject grout into the anchor bolt hole. During grouting, a quick-setting, leak-proof water-resistant grouting method is used to achieve the effect of quickly sealing the anchor bolt hole.
[0037] 3. Install a sealing component. The sealing component re-seals the anchor bolt hole after it has been plugged. This enhances the stability of the anchor bolt in the anchor bolt hole and re-seals the anchor bolt hole, improving its sealing performance and reducing the possibility of water leakage. Attached Figure Description
[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0039] Figure 1 This is a schematic diagram of the installation and sealing assembly according to an embodiment of this application;
[0040] Figure 2 This is a perspective sectional view of an embodiment of this application;
[0041] Figure 3 yes Figure 2 Enlarged view of section A;
[0042] Figure 4 This is a schematic diagram of the structure of the anchor bolt and sealing assembly according to an embodiment of this application;
[0043] Figure 5 This is an exploded view of the anchor bolt and sealing assembly according to an embodiment of this application;
[0044] Figure 6 This is a structural schematic diagram of the anchor bolt and sealing assembly from another perspective of an embodiment of this application;
[0045] Figure 7 This is a schematic diagram of the structure after the sealing assembly is installed according to an embodiment of this application;
[0046] Figure 8 This is a partial perspective sectional view of an embodiment of this application after the sealing assembly has been installed.
[0047] Explanation of reference numerals in the attached drawings: 1. Anchor bolt; 2. Sealing assembly; 21. Grouting component; 211. Grouting pipe; 212. Grouting head; 213. Quick connector; 22. Sealing component; 221. Sealing part; 2211. Sealing disc; 2212. Second clearance hole; 2213. Sealing ring; 2214. Sliding groove; 2215. Snap-fit plate; 2216. Sliding groove; 222. Expansion part; 2221. Expansion disc; 2222. First clearance hole; 2223. Limiting cylinder; 2224. Water permeable hole; 2225. Placement groove; 3. Reinforcing rod; 31. Reinforcing spike; 32. Sliding block; 4. Pressure block; 41. Pressure rod; 5. Sealing assembly; 51. Sealing block; 52. Fixing frame; 53. Sealing cylinder. Detailed Implementation
[0048] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.
[0049] This application discloses a method for sealing a water-stop curtain during anchor bolt construction.
[0050] Reference Figure 1 A method for sealing water-stop curtains during anchor bolt construction, the construction steps are as follows:
[0051] The locations of the anchor bolt holes were measured and marked according to the water levels inside and outside the foundation pit. The working face of anchor bolt 1 was located above the water level inside the foundation pit.
[0052] The drilling rig is positioned to drill anchor bolt holes. A double-casing drilling rig is used to drill the holes. High-pressure water can be used to impact the sand and gravel layer at the hole location when drilling anchor bolt holes.
[0053] Place anchor bolt 1 into the anchor bolt hole;
[0054] After the anchor bolt 1 is installed, a simple sealing treatment is performed at the anchor bolt hole opening;
[0055] Perform grouting once, grouting the anchor bolt 1 near the bottom of the anchor bolt hole;
[0056] Secondary grouting is performed, injecting quick-setting, leak-proof water-stopping material through a conduit within a 1m range from the anchor bolt hole to the outside of the water-stop curtain.
[0057] Then, dry kelp was quickly stuffed into the water-stop curtain area inside the anchor bolt hole;
[0058] The top of anchor rod 1, which is located near the foundation pit, is sealed and fixed again.
[0059] In this embodiment, the first layer of groundwater is perched water, which is prevalent throughout the site, with a stable water level depth of 2.0~2.6m. The second layer of groundwater is unconfined groundwater, with a stable water level depth of 12.50~12.80m. The third layer of groundwater is slightly confined water, with a stable water level depth of 19.00~19.50m and a confined head of 2.0~4.3m. The excavation depth of the foundation pit is 11.33-15.13m. The support structure is mainly a top soil nailing wall + pile anchor form. The groundwater control method adopts a three-axis mixing water-stop curtain pile on the outside of the support structure to seal the water stop, and at the same time, it is supplemented by drainage wells, emergency wells and drainage ditches inside and outside the foundation pit to drain the groundwater and perched water in the curtain and to treat slope seepage.
[0060] After the anchor bolt 1 is installed, a simple sealing treatment is first performed at the anchor bolt hole to prevent a large amount of water and soil from flowing out. Then, within 1m from the anchor bolt hole to the outside of the water-stop curtain, a quick-setting leak-proof type of water-stopping agent is injected through a conduit. The dried kelp inserted near the outside opening of the anchor bolt hole expands when it comes into contact with water. The rapid solidification of the water-stopping agent and the expansion of the dried kelp when it comes into contact with water are used to seal the anchor bolt hole at the water-stop curtain, achieving the purpose of rapid leak sealing. This quickly seals the anchor bolt hole and reduces the impact of water leakage from the anchor bolt hole on the settlement of the existing building.
[0061] This method of sealing anchor holes at the cutoff wall by utilizing the properties of water-resistant materials that solidify rapidly and the water-expanding properties of dried kelp can quickly seal the anchor holes, minimizing the rapid drop in groundwater around the foundation pit, stabilizing the groundwater level, and reducing adverse impacts on the stability of existing buildings, pipelines, and roads, both above and below ground. It reduces the impact of construction work on groundwater level decline, mitigates the impact of leakage at the foundation pit support surface on construction progress and settlement of surrounding existing buildings, saves on overall construction time and the cost of adjusting the foundation pit support structure, and stabilizes the adverse effects of groundwater level settlement on surrounding existing buildings.
[0062] Reference Figure 2 , Figure 3 When the anchor rod 1 is placed in the anchor rod hole, a sealing component 2 is provided around the anchor rod 1. The sealing component 2 includes a grouting component 21 and a sealing element 22. The sealing element 22 is coaxially disposed at one end of the anchor rod 1 and is used to seal the opening of the anchor rod hole. One end of the grouting component 21 passes through the sealing element 22 and is placed into the anchor rod hole together with the end of the anchor rod 1 away from the sealing element 22. The grouting component 21 and the sealing element 22 are detachably connected. The grouting component 21 is used to inject quick-setting leak-proof water into the anchor rod hole.
[0063] Reference Figure 2 , Figure 3 The sealing component 22 includes a sealing element 221 and an expansion element 222. The sealing element 221 and the expansion element 222 are coaxially sleeved on the anchor bolt 1. The peripheral sidewall of the sealing element 221 fits against the inner sidewall of the anchor bolt hole. The expansion element 222 is located at the end of the sealing element 221 near the bottom of the anchor bolt hole, that is, the expansion element 222 is located on the right side of the sealing element 221 and fits against the sealing element 221. A placement groove 2225 is opened at the end of the expansion element 222 away from the sealing element 221. The placement groove 2225 is an annular groove, and dried kelp is placed in the placement groove 2225. The expansion element 222 is made of dried kelp. The dried kelp expands when it comes into contact with water, which facilitates rapid sealing of the anchor bolt hole.
[0064] Reference Figure 3 , Figure 4 The sealing component 221 is slidably connected to a reinforcing rod 3 at one end near the expansion component 222, and multiple reinforcing spikes 31 are welded onto the reinforcing rod 3.
[0065] Specifically, refer to Figure 3 , Figure 4 The sealing component 221 includes a sealing disc 2211 and a sealing ring 2213 welded to the right side wall of the sealing disc 2211. The sealing ring 2213 has a groove 2214 at one end near the reinforcing rod 3. The groove 2214 is cuboid. The reinforcing rod 3 has a slider 32 at one end near the groove 2214. The slider 32 is also cuboid. The slider 32 is located in the groove 2214 and can slide along the groove 2214. The sliding direction of the slider 32 is towards or away from the central axis of the anchor rod 1.
[0066] Reference Figure 3 , Figure 4 In this embodiment, the right side of the slide groove 2214 is open, and a snap-fit plate 2215 is snapped into the opening of the slide groove 2214. The snap-fit plate 2215 restricts the slider 32 from falling out of the slide groove 2214. A sliding groove 2216 for the reinforcing rod 3 to slide is provided at the center of the snap-fit plate 2215.
[0067] Reference Figure 3 , Figure 5 A pressure block 4 is also provided near the slider 32 inside the groove 2214. One end of the pressure block 4 abuts against the slider 32, and the other end is provided with a pressure rod 41. In this embodiment, the pressure block 4 is a triangular prism. The side of the pressure block 4 adjacent to the two right-angled sides abuts against the top of the slider 32 near the anchor rod 1. The pressure block 4 is used to move the slider 32 away from the anchor rod 1. The pressure rod 41 is slidably connected to the sealing plate 2211, and the sliding direction of the pressure rod 41 is the same as the axial direction of the anchor rod 1. In this embodiment, two reinforcing rods 3 are provided at the top and bottom. The connection structure of the reinforcing rods 3 is the same. The left ends of the two pressure rods 41 are welded together with a ring to facilitate simultaneous pressing of the pressure rods 41.
[0068] Reference Figure 5 , Figure 6 The expansion component 222 includes an expansion plate 2221 and a limiting cylinder 2223 located at the end of the expansion plate 2221 away from the sealing plate 2211. The peripheral sidewall of the expansion plate 2221 is in contact with the inner sidewall of the sealing ring 2213. The inner sidewall of the limiting cylinder 2223 is in contact with the outer sidewall of the anchor rod 1, and the limiting cylinder 2223 is provided with a plurality of water-permeable holes 2224. The end of the limiting cylinder 2223 away from the expansion plate 2221 protrudes from the sealing ring 2213.
[0069] Reference Figure 5 , Figure 6The grouting component 21 includes a grouting pipe 211, a grouting head 212, and a quick connector 213. One end of the grouting pipe 211 protrudes from the sealing disc 2211 and the expansion disc 2221 near the bottom of the anchor hole, and the other end is threaded to the quick connector 213. The quick connector 213 is a fast connector used to quickly connect the grouting pipe 211 to the grouting machine. In this embodiment, the grouting machine is a pressure grouting machine. The grouting head 212 is welded to the grouting pipe 211 near the bottom of the anchor hole. At one end of the bottom of the anchor bolt hole, the diameter of the grouting head 212 is larger than that of the grouting pipe 211. The grouting head 212 is connected to the grouting pipe 211. The expansion plate 2221 is provided with a first clearance hole 2222 near the grouting pipe 211. The diameter of the first clearance hole 2222 is the same as that of the grouting head 212. The sealing plate 2211 is provided with a second clearance hole 2212 near the grouting pipe 211. The diameter of the second clearance hole 2212 is the same as that of the grouting pipe 211.
[0070] Reference Figure 7 , Figure 8 A sealing assembly 5 is also provided at the anchor bolt hole. The sealing assembly 5 includes a sealing block 51, a fixing frame 52, and a sealing cylinder 53. One end of the sealing block 51 is snapped into the anchor bolt hole and located inside the anchor bolt hole. The other end is connected to the water-stop curtain through an installation frame. The installation frame and the water-stop curtain are fixedly connected by bolts. The fixing frame 52 is fixedly connected to the end of the sealing block 51 away from the anchor bolt hole through bolts. The sealing cylinder 53 is sleeved around the anchor bolt 1. One end of the sealing cylinder 53 protrudes from the side of the sealing block 51 located inside the anchor bolt hole, and the other end protrudes from the side of the fixing frame 52 away from the sealing block 51. The sealing cylinder 53 is used to fill and seal the gap between the anchor bolt 1 and the sealing block 51. In this embodiment, the sealing cylinder 53 is a rubber cylinder.
[0071] The implementation principle of the water-stop curtain sealing method for anchor bolt construction according to an embodiment of this application is as follows: When fixing the anchor bolt 1, the anchor bolt 1 and the grouting pipe 211 are placed together into the anchor bolt hole, and the sealing ring 2213 is snapped into the anchor bolt hole opening. The expansion plate 2221 and the limiting cylinder 2223 are located inside the sealing ring 2213. After the sealing component 221 is snapped in place, the grouting machine is started to grout into the anchor bolt hole. As the grouting volume increases, the grouting pipe 211 is gradually pulled out until the anchor bolt hole is filled with a quick-setting leak-proof type. As the grouting pipe 211 is pulled out, the grouting head 212 disengages from the first clearance hole 2222 and abuts against the sealing plate 2211. The grouting pipe 211 is pulled out further, and at the same time the ring is pressed, causing the ring to drive the pressure rod 41 to push the slider 32 until the snap plate 2215 disengages from the slide groove 2214. The grouting pipe 211 drives the sealing component 221 to disengage from the anchor bolt hole. The sealing block 51 is placed in, and the sealing cylinder 53 is used to wrap the anchor bolt 1, thereby quickly sealing the anchor bolt hole and reducing the impact of water leakage from the anchor bolt hole on the settlement of the existing building.
[0072] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0073] The above are all optional 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 sealing a water-stop curtain during anchor bolt construction, characterized in that, The construction steps are as follows:
1. Measure and mark the hole positions. Based on the water level inside and outside the foundation pit, conduct test hole layout, measure and mark the position of the anchor bolt hole. The working face of the anchor bolt (1) is located above the water level inside the foundation pit.
2. Place the drilling rig at the anchor bolt hole position and use a double-casing drilling rig to drill the anchor bolt hole. Use high-pressure water to impact the sand and gravel layer at the hole position.
3. Place the anchor bolt (1) inside the anchor bolt hole.
4. After the anchor bolt (1) is constructed, perform simple sealing treatment at the anchor bolt hole opening.
5. Perform grouting for the first time. Grout the anchor bolt (1) near the bottom of the anchor bolt hole.
6. Perform secondary grouting. Inject quick-setting leak-proof water through a guide pipe within 1m from the anchor bolt hole opening to the outside of the water-stop curtain.
7. Quickly insert dry seaweed into the water-stop curtain area inside the anchor bolt hole.
8. Seal and fix the top of the anchor bolt (1) near the foundation pit again. When the anchor rod (1) is placed in the anchor rod hole, a sealing component (2) is provided around the anchor rod (1). The sealing component (2) includes a grouting component (21) and a sealing component (22). The sealing component (22) is coaxially disposed at one end of the anchor rod (1). One end of the grouting component (21) passes through the sealing component (22) and is placed into the anchor rod hole together with the end of the anchor rod (1) away from the sealing component (22). The grouting component (21) and the sealing component (22) are detachably connected. The sealing component (22) is used to seal the opening of the anchor rod hole. The grouting component (21) is used to inject the quick-setting leak-proof water into the anchor rod hole. The sealing component (22) includes a sealing component (221) and an expansion component (222). The sealing component (221) and the expansion component (222) are coaxially connected to the anchor rod (1). The peripheral sidewall of the sealing component (221) fits into the anchor rod hole. The expansion component (222) is located at one end of the sealing component (221) near the bottom of the anchor rod hole. A placement groove (2225) is provided at the end of the expansion component (222) away from the sealing component (221). Dried kelp is placed in the placement groove (2225). The sealing member (221) has a reinforcing rod (3) at one end near the expansion member (222), and the reinforcing rod (3) has multiple reinforcing spikes (31). The reinforcing rod (3) is slidably connected to the sealing member (221). The sealing member (221) includes a sealing disc (2211) and a sealing ring (2213) located at one end of the sealing disc (2211) near the expansion member (222). The sealing ring (2213) has a groove (2214) at one end near the reinforcing rod (3). The reinforcing rod (3) has a slider (32) at one end near the groove (2214). The slider (32) is located in the groove (2214) and can slide along the groove. (2214) Sliding, the sliding direction of the slider (32) is close to or away from the axis of the anchor rod (1). A pressure block (4) is also provided in the groove (2214) near the slider (32). One end of the pressure block (4) abuts against the slider (32), and the other end is provided with a pressure rod (41). The pressure rod (41) is slidably connected to the sealing plate (2211). The sliding direction of the pressure rod (41) is the same as the axis direction of the anchor rod (1). The pressure block (4) is used to move the slider (32) away from the anchor rod (1). The expansion component (222) includes an expansion plate (2221) and a limiting cylinder (2223) located at the end of the expansion plate (2221) away from the sealing plate (2211). The peripheral sidewall of the expansion plate (2221) is in contact with the inner sidewall of the sealing ring (2213), and the inner sidewall of the limiting cylinder (2223) is in contact with the outer sidewall of the anchor rod (1). The limiting cylinder (2223) is provided with multiple water-permeable holes (2224).
2. The method for sealing a water-stop curtain during anchor bolt construction according to claim 1, characterized in that: The expansion component (222) is made of dried kelp.
3. The method for sealing a water-stop curtain during anchor bolt construction according to claim 1, characterized in that: The end of the limiting cylinder (2223) away from the expansion plate (2221) protrudes into the sealing ring (2213).
4. The method for sealing a water-stop curtain during anchor bolt construction according to claim 1, characterized in that: The grouting component (21) includes a grouting pipe (211), a grouting head (212), and a quick connector (213). One end of the grouting pipe (211) protrudes from the sealing disc (2211) and the expansion disc (2221) near the bottom of the anchor hole, and the other end is connected to the quick connector (213). The quick connector (213) is used to quickly connect the grouting pipe (211) to the grouting machine. The grouting head (212) is connected to the end of the grouting pipe (211) near the bottom of the anchor hole. The diameter of the grouting head (212) is larger than the diameter of the grouting pipe (211). The expansion plate (2221) has a first clearance hole (2222) near the grouting pipe (211). The diameter of the first clearance hole (2222) is the same as the diameter of the grouting head (212). The sealing plate (2211) has a second clearance hole (2212) near the grouting pipe (211). The diameter of the second clearance hole (2212) is the same as the diameter of the grouting pipe (211).
5. A method for sealing a water-stop curtain during anchor bolt construction according to claim 1, characterized in that: A sealing assembly (5) is also provided at the anchor bolt hole. The sealing assembly (5) includes a sealing block (51), a fixing frame (52), and a sealing cylinder (53). One end of the sealing block (51) is located inside the anchor bolt hole, and the other end is connected to the water-stop curtain. The fixing frame (52) is connected to the end of the sealing block (51) away from the anchor bolt hole. The sealing cylinder (53) is sleeved around the anchor bolt (1). One end of the sealing cylinder (53) protrudes from the side of the sealing block (51) located inside the anchor bolt hole, and the other end protrudes from the side of the fixing frame (52) away from the sealing block (51). The sealing cylinder (53) is used to fill and seal the gap between the anchor bolt (1) and the sealing block (51).