Pressure maintaining, drainage limiting and grouting device for anchor rod and anchor cable construction below underground water level line
By using a pressure-keeping and grouting device in the construction of anchor bolt anchor cables, limited slag discharge and synchronous grouting are achieved, the problems of formation medium loss and influx in the construction of anchor bolts below the groundwater level line are solved, ensuring the safety and stability of construction.
Patent Information
- Application Number
- CN202422426009.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-09
AI Technical Summary
In the construction of anchor cables below the groundwater level line, it is difficult for the prior art to effectively control the loss of formation medium during drilling and the influx of formation medium when the outer casing is pulled, resulting in ground deformation and the extraction of anchor cables.
A pressure-retaining and grouting device is adopted, including a hollow sleeve, a first interface, a second interface and a slag discharge hole. The limited slag discharge is achieved by controlling the opening and closing state of the slag discharge hole, and synchronous grouting is carried out when the outer sleeve is pulled out to prevent the formation medium from pouring in.
Effectively control the formation loss during drilling, prevent ground deformation, and prevent formation medium from pouring in when pulling out the outer casing, ensuring the stability of anchor rod and cable.
Smart Images
Figure CN223152084U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of anchor rod and cable construction, in particular to the field of anchor rod and cable construction below the groundwater level line, and more specifically to a pressure-holding, limited-discharge and grouting device for anchor rod construction below the groundwater level line. Background Technique
[0002] During the existing construction of anchor rods and cables below the groundwater level line, it is often encountered that the formation is prone to caving. In order to prevent caving during construction, the full casing follow-up method is often used for the construction of anchor rods and cables.
[0003] When the outer casing follows up and drills during the construction of anchor rods and cables, if a large amount of the medium in the formation is lost, it will cause the deformation of the ground and surrounding structures, posing a great safety hazard. In addition, for the underwater construction of anchor rods and cables in some formations, it is necessary to carry out bottom sealing grouting before the anchor rods and cables can be successfully installed. After the anchor rods and cables are installed, during the process of pulling out the outer casing, when the drill bit end of the outer casing is pulled to the ungrouted section, the medium in the formation will pour into the outer casing, wrapping the outer casing and the anchor rod or cable, resulting in the anchor rod and cable being pulled out together with the outer casing.
[0004] It can be seen that during the drilling with the follow-up of the outer casing, being able to achieve limited slag discharge and minimize formation loss is the key to construction control. At the same time, during the process of pulling out the outer casing, how to prevent the formation medium from pouring into the outer casing is also a key factor in the success or failure of the anchor rod and cable construction.
[0005] Therefore, it has become an urgent problem in the industry to provide a pressure-holding, limited-discharge and grouting device for anchor rod construction below the groundwater level line, which can control the loss of the formation medium during the drilling process, and at the same time prevent the formation medium from pouring into the outer casing and can realize synchronous grouting during the process of pulling out the outer casing. Content of the Utility Model
[0006] Aiming at the above problems, one of the purposes of the utility model is to provide a pressure-holding, limited-discharge and grouting device for anchor rod construction below the groundwater level line, which can achieve limited discharge of drill cuttings during the underwater anchor rod drilling construction, thereby controlling formation loss and avoiding large deformation of the ground or surrounding structures; after the anchor rods and cables are installed, during the process of pulling out the outer casing, this device can prevent the medium in the formation from pouring into the outer casing and at the same time realize the operation of pressure-holding grouting.
[0007] To achieve the above purpose, the utility model provides the following technical solutions:
[0008] The utility model provides a pressure maintaining, limited discharging and grouting device for construction of anchor rods and anchor cables below the groundwater level line, which comprises: a hollow sleeve body, a first interface arranged at one end of the hollow sleeve body, a second interface arranged at the other end of the hollow sleeve body, and slag discharging holes annularly arranged on the outer wall of the hollow sleeve body and communicated with the inner cavity of the hollow sleeve body. Wherein, the aperture of the first interface matches the aperture of the outer sleeve pipe for construction of anchor rods and anchor cables below the groundwater level line, the aperture of the second interface matches the aperture of the drill power head for construction of anchor rods and anchor cables below the groundwater level line, the aperture of the inner cavity of the hollow sleeve body is larger than the aperture of the inner drill rod for construction of anchor rods and anchor cables below the groundwater level line, and a valve is arranged at the orifice of the slag discharging hole to control the opening and closing state of the corresponding slag discharging hole.
[0009] In some embodiments, the inner wall of the first interface is provided with a first internal thread for threaded connection with the outer sleeve pipe for construction of anchor rods and anchor cables below the groundwater level line.
[0010] In some embodiments, the inner wall of the second interface is provided with a second internal thread for threaded connection with the drill power head for construction of anchor rods and anchor cables below the groundwater level line.
[0011] In some embodiments, 2 to 3 slag discharging holes are annularly arranged on the outer wall of the hollow sleeve body.
[0012] In some embodiments, external threads are provided on the outer wall of the orifice of each slag discharging hole for threaded connection with the valve.
[0013] In some embodiments, a ball valve or a butterfly valve is arranged at the orifice of each slag discharging hole.
[0014] In some embodiments, the diameters of the first interface and the second interface are the same.
[0015] In some embodiments, the diameters of the first interface and the second interface are different.
[0016] In some embodiments, the diameter sizes of the first interface and the second interface are adjusted according to the sizes of the outer sleeve pipe and the drill power head.
[0017] Due to the adoption of the above technical solutions, the utility model has at least obtained the following technical effects: (1) During drilling, slag can be discharged in a limited amount, the loss of media in the formation can be controlled, and the deformation of surrounding structures can be avoided; (2) When pulling out the outer sleeve pipe, synchronous grouting can prevent formation media from flowing into the outer sleeve pipe, and prevent the anchor rods and anchor cables from being pulled out together with the outer sleeve pipe during the removal of the outer sleeve pipe; (3) Since local relaxation will occur in the formation when pulling out the sleeve pipe, synchronous grouting can timely perform compensatory grouting on the formation and effectively control the formation deformation. Description of the Drawings
[0018] Figure 1 The structural schematic diagram of the pressure maintaining, drainage limiting and grouting device for construction of anchor rods and anchor cables below the groundwater level line of the present utility model is shown;
[0019] Figure 2 The schematic diagram of the use state of the pressure maintaining, drainage limiting and grouting device for construction of anchor rods and anchor cables below the groundwater level line of the present utility model is shown;
[0020] Explanation of reference numerals:
[0021] 1 - Hollow sleeve, 11 - First interface, 110 - First internal thread, 12 - Second interface, 120 - Second internal thread, 13 - Slag discharge hole, 130 - Valve, 2 - Inner drill pipe for construction of anchor rods and anchor cables below the groundwater level line, 3 - Outer casing for construction of anchor rods and anchor cables below the groundwater level line, 4 - Drilling rig power head for construction of anchor rods and anchor cables below the groundwater level line. Detailed implementation manners
[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the above components. Without otherwise stating, the above terms have no special meanings and cannot be construed as indicating or implying relative importance.
[0024] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0025] As a non-limiting embodiment, the pressure-holding, discharge-limiting and grouting device for construction of anchor rods and anchor cables below the groundwater level provided by the present utility model is as follows Figure 1 shown, including: a hollow sleeve body 1 with a hollow structure inside, the two ends of the hollow sleeve body 1 are respectively a first interface 11 and a second interface 12, and there are two slag discharge holes 13 communicated with the inner cavity of the hollow sleeve body 1 on the outer wall of the hollow sleeve body 1.
[0026] During use, as Figure 2 shown, the inner drill rod 2 for construction of anchor rods and anchor cables below the groundwater level can pass through the inner cavity of the hollow sleeve body 1. The aperture of the first interface 11 matches the aperture of the outer sleeve pipe 3 for construction of anchor rods and anchor cables below the groundwater level. The inner wall of the first interface 11 is provided with a first internal thread 110, so that it can be threadedly connected with the outer sleeve pipe 3 for construction of anchor rods and anchor cables below the groundwater level. The aperture of the second interface 12 matches the aperture of the drill rig power head 4 for construction of anchor rods and anchor cables below the groundwater level. The inner wall of the second interface 12 is provided with a second internal thread 120, so that it can be threadedly connected with the drill rig power head 4 for construction of anchor rods and anchor cables below the groundwater level. A ball valve or a butterfly valve serving as a valve 130 is provided at the orifice of the slag discharge hole 13, so as to control the opening and closing state of the corresponding slag discharge hole.
[0027] Thus, when using the pressure-holding, discharge-limiting and grouting device for construction of anchor rods and anchor cables below the groundwater level of the present utility model for drilling construction, the drill rig is connected to the outer sleeve pipe 3 through the first interface 11, and the inner drill rod 2 passes through the inside of the hollow sleeve body 1. When using a pneumatic drill, a water drill or mud slurry for protecting the hole wall to form a hole, according to the slag discharge amount of the formation, by controlling the opening and closing of the ball valve or the butterfly valve at the orifice of the slag discharge hole 13, the drilling slag discharge amount is controlled to achieve the purpose of controlling deformation.
[0028] After installing the anchor rod or the anchor cable and when it is necessary to pull out the outer sleeve pipe 3, completely close the opening and closing of the ball valve or the butterfly valve at the orifice of the slag discharge hole 13, and then connect the grouting pump and the drill rig power head 4 through the grouting pipe. While pulling out the outer sleeve pipe 3, the grouting pump injects cement slurry through the outer sleeve pipe 3 to maintain pressure inside the outer sleeve pipe 3, preventing formation media from flowing into the outer sleeve pipe 3 and wrapping the outer sleeve pipe and the anchor rod or the anchor cable, resulting in the defect that the anchor rod and the anchor cable are pulled out together with the outer sleeve pipe.
[0029] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A pressure-holding, limited-drainage and grouting device for construction of anchor rods and anchor cables below the groundwater level line, characterized in that, Comprising: A hollow sleeve, a first interface provided at one end of the hollow sleeve, a second interface provided at the other end of the hollow sleeve, and slag discharge holes annularly provided on the outer wall of the hollow sleeve and communicating with the inner cavity of the hollow sleeve. Wherein, the aperture of the first interface matches the aperture of the outer sleeve for anchor rod and cable construction below the groundwater level line, the aperture of the second interface matches the drill power head for anchor rod and cable construction below the groundwater level line, the inner cavity aperture of the hollow sleeve is larger than the aperture of the inner drill rod for anchor rod and cable construction below the groundwater level line, and a valve is provided at the orifice of the slag discharge hole to control the opening and closing state of the corresponding slag discharge hole.
2. The pressure-holding, limited-drainage and grouting device for construction of anchor rods and anchor cables below the groundwater level line according to claim 1, wherein The inner wall of the first interface is provided with a first internal thread for threaded connection with the outer sleeve for anchor rod and cable construction below the groundwater level line.
3. The pressure-holding, limited-drainage and grouting device for construction of anchor rods and anchor cables below the groundwater level line according to claim 1, characterized in that, The inner wall of the second interface is provided with a second internal thread for threaded connection with the drill power head for anchor rod and cable construction below the groundwater level line.
4. The pressure-holding, limited-drainage and grouting device for construction of anchor rods and anchor cables below the groundwater level line according to claim 1, characterized in that, 2 to 3 of the slag discharge holes are annularly provided on the outer wall of the hollow sleeve.
5. The pressure-holding, limited-drainage and grouting device for construction of anchor rods and anchor cables below the groundwater level line according to claim 4, characterized in that, The outer wall of the orifice of each slag discharge hole is provided with an external thread for threaded connection with the valve.
6. The pressure-holding, limited-drainage and grouting device for underground anchor rod and cable construction below the groundwater level line according to claim 5, characterized in that A ball valve or a butterfly valve is provided at the orifice of each slag discharge hole.
7. The pressure-holding, limited-drainage and grouting device for construction of anchor rods and anchor cables below the groundwater level line according to claim 1, wherein The diameters of the first interface and the second interface are the same.
8. The pressure-holding and drainage-limiting and grouting device for construction of anchor rods and anchor cables below the groundwater level line according to claim 1, characterized in that, The diameters of the first interface and the second interface are different.