Fixing and grouting device for inner support of anti-floating anchor rod
By designing an anti-floating anchor inner bracket fixing and grouting device, the binding and fixing of the positive hexagonal star-shaped plastic inner bracket and steel bars is used to achieve accurate control of the spacing of steel bars, solving the problems of low efficiency, low accuracy and high cost in the existing technology, and improving work efficiency and structural stability.
Patent Information
- Application Number
- CN202422055540.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-23
AI Technical Summary
The prior art has low efficiency and low accuracy in controlling the spacing of anti-floating anchor rod steel bars, and requires a lot of manpower investment and is costly.
A fixed and grouting device for anti-floating anchor rod inner bracket is designed, and the positive hexagonal star-shaped plastic inner bracket and anti-floating anchor rod steel bar are tied and fixed by wire to accurately control the spacing of the steel bars, and a grouting tube is installed in the inner bracket to achieve grouting.
Controlling the spacing of steel bars through the inner bracket improves work efficiency and accuracy, reduces production costs, and avoids the inefficiency and high cost problems of manual measurement and adjustment.
Smart Images
Figure CN222990717U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an anti - floating anchor rod, specifically to a fixing and grouting device for the inner support of an anti - floating anchor rod. Background Technique
[0002] In the fields of construction engineering, tunnel engineering, underground pipe galleries, bridge engineering, etc., the use of anti - floating anchor rod steel bars is very extensive. It is a kind of anti - floating measure for underground structures, mainly used to resist the upward movement trend of buildings caused by groundwater buoyancy, and ensure the stability and safety of buildings. The steel bars of anti - floating anchor rods usually need to have good stability and durability to ensure the safety and reliability of buildings. However, in actual operation, due to the long length of the steel bars, the control of the spacing between the steel bars is an important issue. If the spacing is uneven, it may affect the force distribution of the steel bars, thereby affecting the overall structural stability of the building.
[0003] The existing technology controls the spacing between steel bars by manual measurement and adjustment, but the efficiency is low, the accuracy is not high, and a large amount of manpower is required, resulting in high costs.
[0004] Therefore, the known method of manual measurement and adjustment has the above - mentioned inconveniences and problems. Content of the Utility Model
[0005] The purpose of the utility model is to provide a safe and reliable fixing and grouting device for the inner support of an anti - floating anchor rod.
[0006] To achieve the above - mentioned purpose, the technical solution of the utility model is as follows:
[0007] A fixing and grouting device for the inner support of an anti - floating anchor rod, including an anti - floating anchor rod, a number of inner supports, and a number of outer supports, characterized in that:
[0008] The anti - floating anchor rod is a steel pipe, and the length of the steel pipe is ≥12m;
[0009] The inner support is a regular hexagonal star - shaped plastic support. A boss ring is provided at the center of the regular hexagonal star - shaped plastic support to enhance the structure. A grouting pipe is passed through the boss ring. Vertical steel bars are passed through between adjacent corners of the regular hexagonal star - shaped plastic support. The planar connection of three of the vertical steel bars forms an equilateral triangle. The vertical steel bars and the regular hexagonal star - shaped plastic support are tied and fixed with wire;
[0010] The outer support is a gear - shaped ring made of steel bars;
[0011] Wherein: the outer support is placed inside the anti - floating anchor rod, a corrugated pipe is placed inside the outer support, the inner support is placed inside the corrugated pipe, and a grouting pipe is provided at the center of the inner support.
[0012] The anti-floating anchor rod internal support fixing and grouting device of the present utility model can also be further realized by adopting the following technical measures.
[0013] For the aforementioned anti-floating anchor rod internal support fixing and grouting device, the plastic is rigid polyvinyl chloride.
[0014] For the aforementioned anti-floating anchor rod internal support fixing and grouting device, the diameter of the anti-floating anchor rod is ≥150 mm.
[0015] For the aforementioned anti-floating anchor rod internal support fixing and grouting device, the spacing of the internal supports is ≥2 m.
[0016] For the aforementioned anti-floating anchor rod internal support fixing and grouting device, the distance from the bottom end of the anti-floating anchor rod to the bottom of the anchor rod hole is 50 mm.
[0017] After adopting the above technical solution, the anti-floating anchor rod internal support fixing and grouting device of the present utility model has the following advantages:
[0018] 1. Improve efficiency. By controlling the spacing between steel bars through the internal support, the low efficiency problem of manual measurement and adjustment is avoided, greatly improving the work efficiency and saving time costs;
[0019] 2. Improve accuracy. The design of the internal support can accurately control the spacing between steel bars, avoiding errors that may occur in manual measurement and adjustment, thereby improving the uniformity of the force distribution of the steel bars and ensuring the overall structural stability of the building;
[0020] 3. Reduce costs. Since the need for manual measurement and adjustment is avoided, a large amount of labor input is reduced, the production cost is reduced, which is conducive to large-scale application. Description of the Drawings
[0021] Figure 1 It is a schematic structural diagram of the use state of the anti-floating anchor rod in the embodiment of the present utility model;
[0022] Figure 2 is Figure 1 The cross-sectional view taken along A-A in
[0023] In the figure: 1 raft slab, 2 waterproof and water-stop board, 3 slurry penetration area, 4 water-stop paste, 5 anti-floating anchor rod, 6 internal support, 7 external support, 8 corrugated pipe, 9 steel bar, 10 grouting pipe, 11 slurry, 12 anti-floating anchor rod pipe wall. Detailed Embodiments
[0024] The present utility model will be further described below in conjunction with the embodiments and their accompanying drawings.
[0025] Embodiment 1
[0026] Now please refer to Figure 1 andFigure 2 , for the anti-floating anchor rod inner support fixing and grouting device of the present utility model, a regular hexagonal star-shaped plastic inner support 6 is designed and manufactured. The inner support is made of rigid polyvinyl chloride, and its internal structure is reasonably designed, which can effectively control the spacing between the anti-floating anchor rod steel bars. The inner diameter and outer diameter of the inner support can be adjusted according to actual needs to adapt to steel bars of different lengths and diameters. The steel bars and the inner support are tied and fixed with iron wire. Through the fixation of the inner support and the anti-floating anchor rod steel bars, the spacing between the steel bars is accurately controlled, which can not only improve the control accuracy of the spacing of the steel bars 9, but also improve the production efficiency and reduce the production cost. A corrugated pipe 8 is arranged on the outer side of the inner support, and an outer support 7 is arranged on the outer side of the corrugated pipe. During the production process of the anti-floating anchor rod steel bars, by using the inner support to control the spacing between the steel bars, the problem that the overall structural stability of the building is affected due to uneven spacing between the steel bars can be avoided. This is because the inner support can ensure that the spacing between each steel bar is the same, thus ensuring the stability of the entire anti-floating anchor rod. During the production process of the anti-floating anchor rod steel bars, materials such as rigid polyvinyl chloride can be selected as the material of the inner support. The middle part of the device is hollow, and a grouting pipe 10 can be placed through this part. The grouting pipe extends to near the bottom plate of the anchor rod hole for the grouting process. Install the inner support 6, the outer support 7, the corrugated pipe 8, the steel bar 9 and the grouting pipe 10 inside the anti-floating anchor rod wall 12.
[0027] Example 2
[0028] The using method of the anti-floating anchor rod inner support fixing and grouting device of the present utility model:
[0029] Step 1: Select PVC material that is corrosion-resistant and high-temperature resistant to manufacture the inner support 6. The length of the anchor rod steel bar is set to 11 m, the diameter of the anti-floating anchor rod hole is set to 150 mm, the spacing of the inner positioning support is 2 m, and the distance from the end of the anti-floating anchor rod to the bottom of the anchor rod hole is 50 mm.
[0030] Step 2: Put the selected PVC material into the manufacturing equipment, and through heating and pressurization, shape the PVC material into the shape of the inner support we need. In this embodiment, the heating temperature is set to 200 °C, and the pressurization pressure is set to 10 MPa.
[0031] Step 3: Cool the manufactured inner support to room temperature and then take it out. In this embodiment, the cooling time is set to 1 hour.
[0032] Step 4: Pass the manufactured anti-floating anchor rod steel bar through the inner support. Select a steel bar with a diameter of 20 mm, and the vertical spacing between the upper and lower inner supports is set to 2 m. The inner support and the anti-floating anchor rod steel bar are tied and fixed with binding wire. Through the fixing effect of the inner support and the anti-floating anchor rod steel bar, the spacing between the steel bars is accurately controlled.
[0033] Step 5: Conduct secondary grouting under the raft foundation 1. There is a waterproof and waterstop board 2 under the waterproof and waterstop board of the raft foundation 1. Through the circular hole in the middle of the inner support, insert the grouting pipe 10 to the bottom of the anti-floating anchor rod 5 and then pull it out 50 mm before starting grouting. During grouting, after the anchor rod is cleared of holes, a squeeze pump can be used for grouting. The grouting is constructed by the hole-bottom backflow method. The grouting uses pure cement slurry with a cement slurry strength of M30, and secondary high-pressure grouting is adopted. For the first time, normal-pressure grouting is carried out with a grouting pressure of about 0.9 MPa. The second high-pressure grouting is carried out 4 h to 8 h after the first grouting, with a grouting pressure of 2.0 to 4.0 MPa. The final pressure is not less than 2 MPa and the pressure stabilization time is not less than 5 min. If necessary, a small amount of water reducing agent can be added to accelerate the setting speed of the slurry 11. At the site, the slurry should be strictly configured according to the designed mix ratio, the slurry should be stirred evenly, and can be pumped only after being screened. The perfusion should be continuous without interruption and used up before initial setting.
[0034] During the grouting process, when it is seen that the slurry overflows from the hole, when reaching the penetration point 3 of the slurry, the grouting pipe can be gradually pulled out until it is pulled out of the hole mouth, and it is required to ensure that the hole is full of slurry. The joint between the top of the anti-floating anchor rod and the bottom of the raft foundation uses a waterstop paste. Since the slurry shrinks when it solidifies and the slurry level drops, it is necessary to make up the slurry in time. After the grouting is completed, the anchor rod head should be temporarily supported to ensure that the anchor rod is in the central position in the air.
[0035] The anti-floating anchor rod inner support fixing and grouting device of the present utility model is applied to the EPC project of the South City Gate and surrounding tourism infrastructure construction project in Dingzhou City, with remarkable effects, ensuring the construction period, optimizing the construction method, saving construction costs, and obtaining high recognition from the owner. And it is applied to other foundation projects with high groundwater level and requirements for anti-floating.
[0036] The above embodiments are only for illustrating the present utility model, rather than limiting the present utility model. Those skilled in the relevant technical fields can make various transformations or changes without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions should also belong to the scope of the present utility model and should be defined by each claim.
Claims
1. An anti-floating anchor rod inner bracket fixing and grouting device, comprising an anti-floating anchor rod, a plurality of inner brackets, and a plurality of outer brackets, characterized in that: The anti-floating anchor rod is a steel pipe with a length of ≥12m; The inner bracket is a regular hexagonal star-shaped plastic bracket, a boss ring is provided at the center of the regular hexagonal star-shaped plastic bracket to strengthen the structure, a grouting pipe is passed through the boss ring, and vertical steel bars are passed through between two adjacent corners of the regular hexagonal star-shaped plastic bracket, wherein the plane connecting line of the three vertical steel bars forms an equilateral triangle, and the vertical steel bars and the regular hexagonal star-shaped plastic bracket are tied and fixed with iron wire; The outer support is a gear-shaped ring with steel bars; Wherein: the anti-floating anchor rod has an outer bracket arranged inside, a corrugated pipe is arranged inside the outer bracket, an inner bracket is arranged inside the corrugated pipe, and a grouting pipe is arranged at the center of the inner bracket.
2. The anti-floating anchor inner support fixing and grouting device according to claim 1, characterized in that: The plastic is hard polyvinyl chloride.
3. The anti-floating anchor inner support fixing and grouting device according to claim 1, characterized in that: The diameter of the anti-floating anchor rod is ≥150 mm.
4. The anti-floating anchor inner support fixing and grouting device according to claim 1, characterized in that: The inner support spacing is ≥2m.
5. The anti-floating anchor inner support fixing and grouting device according to claim 1, characterized in that: The bottom end of the anti-floating anchor rod is 50 mm away from the bottom of the anchor rod hole.