A prestressed anchor cable rapid hole-forming machine in deep sand layer

Abstract

The utility model discloses a kind of quick hole-forming machines of prestressed anchor cable in deep sand layer, belong to prestressed anchor cable construction technical field, including water drill machine body, the output end of water drill machine body is fixed with transition pipe, another end of transition pipe is welded with rotating disc, the surface of rotating disc away from water drill machine body is fixedly connected with fixed sleeve pipe, fixed hollow drill rod, high-pressure water pipe is through with fixed hollow drill rod, fixed sleeve pipe surrounds fixed hollow drill rod, the end of fixed sleeve pipe is threadedly connected with assembly sleeve pipe, the end of fixed hollow drill rod is threadedly connected with assembly hollow drill rod. The utility model is equipped with assembly sleeve pipe, assembly hollow drill rod, supports multiple series, length is flexibly adjusted, effectively reduces the interference of drill rod and water flow to hole wall periphery, improves hole-forming rate;Through the setting backflow cavity, water hole, transition pipe, it is convenient to recycle water resources and secondary utilization, improve resource utilization.

Description

Technical Field

[0001] This utility model belongs to the field of prestressed anchor cable construction technology, specifically relating to a rapid hole-forming machine for prestressed anchor cables in deep sand layers. Background Technology

[0002] Prestressed anchor cables are widely used in bridge, high-rise building, tunnel and other engineering fields in China, especially in the construction of transportation infrastructure such as highways, high-speed railways and bridges.

[0003] As building heights increase, so does the depth of foundation pit excavation. This increasing depth has led to greater attention being paid to foundation pit support structure solutions by engineering technicians. However, constructing such technologies in deep sand layers is quite challenging.

[0004] Traditional auger drilling and casing follow-up methods are applicable in clay, loess and sandy clay layers, but their effectiveness is limited when faced with the deep sand layers in North China. Several shortcomings are exposed during construction, such as the hole collapse phenomenon that is prone to occur during drilling, which affects the quality and efficiency of the project. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a rapid hole-forming machine for prestressed anchor cables in deep sand layers.

[0006] The technical solution adopted to solve the above technical problems is: a rapid hole-forming machine for prestressed anchor cables in deep sand layers, including a water drill body, a transition pipe fixedly connected to the output end of the water drill body, a rotating disk welded and fixed to the other end of the transition pipe, a water passage hole opened in the center of the rotating disk, and a high-pressure water pipe rotatably connected to the inner wall of the water passage hole through a rotary joint.

[0007] A fixed sleeve and a fixed hollow drill rod are fixedly connected to the surface of the rotating disk away from the main body of the water drill. The high-pressure water pipe is connected to the fixed hollow drill rod. The fixed sleeve surrounds the fixed hollow drill rod. An assembly sleeve is threaded to the end of the fixed sleeve. An assembly hollow drill rod is threaded to the end of the fixed hollow drill rod. A hollow drill bit is threaded to the end of the assembly sleeve. A spiral drill bit is threaded to the end of the assembly hollow drill rod. The centers of the spiral drill bit and the hollow drill bit are both located on the rotation axis of the main body of the water drill.

[0008] Furthermore, there are several of the assembled hollow drill rods and assembled sleeves, with the end of the assembled hollow drill rods being threaded to the top end, and the end of the assembled sleeves being threaded to the top end.

[0009] The above technical solution supports multiple sections connected in series, allowing for flexible adjustment of the length by adding or removing sections as needed, and is suitable for sand layers of different thicknesses.

[0010] Furthermore, the connecting end of the hollow drill bit is threadedly adapted to the end of the fixed hollow drill rod, and the connecting end of the auger drill bit is threadedly adapted to the end of the fixed sleeve.

[0011] The above technical solutions enable rapid replacement of drill bits of different specifications to meet the requirements of diverse geological conditions.

[0012] Furthermore, the gap between the fixed sleeve, the assembled sleeve and the assembled hollow drill rod, and the fixed hollow drill rod is set as a reflux cavity.

[0013] Through the above technical solution, when the device is running, the negative pressure effect formed by the return chamber forces the slag-containing water to flow out along a predetermined path, eliminating the "drill sticking" phenomenon commonly seen in traditional drilling, preventing blockage, and maintaining high-efficiency cutting performance.

[0014] Furthermore, the surface of the rotating disk is provided with a plurality of flow holes around the water passage hole, the flow holes are connected to the return cavity, the transition pipe surrounds the flow holes, and the side wall of the transition pipe is provided with a water outlet.

[0015] Through the above technical solution, the slag-containing water in the reflux chamber flows into the transition pipe through the flow hole and is then discharged through the outlet, which facilitates the recycling and reuse of water resources, improves resource utilization, and reduces operating costs.

[0016] Furthermore, the auger drill bit is located inside the assembly casing, and a water flow perforation hole is radially formed at the center of the auger drill bit. A diversion oblique hole is formed on the side wall of the auger drill bit, and the diversion oblique hole communicates with the water flow perforation hole.

[0017] The above technical solution optimizes the water flow distribution, allowing high-pressure water to act directly on the cutting surface, softening the sand layer, assisting drilling, improving efficiency, and the spiral shape helps improve slag removal capacity and prevents repeated grinding of already crushed materials.

[0018] The beneficial effects of this utility model are as follows:

[0019] (1) By setting up the assembled casing, assembled hollow drill rod, hollow drill bit, and spiral drill bit, it supports multiple sections connected in series. The number of sections can be increased or decreased as needed, and the length can be flexibly adjusted. It is suitable for sand layers of different thicknesses. The casing accompanies the drilling of the drill rod, which effectively reduces the interference of the drill rod and water flow on the surrounding hole wall, significantly prevents the collapse phenomenon that may occur during the drilling process, and improves the hole formation rate.

[0020] (2) By setting up a return cavity, water passage hole and transition pipe, excess water is guided to be discharged, which facilitates the recycling of water resources for secondary use, improves resource utilization rate and reduces operating costs. Attached Figure Description

[0021] Figure 1 This is a perspective view of a rapid hole-forming machine for prestressed anchor cables in deep sand layers, according to this utility model.

[0022] Figure 2 This is a partial cross-sectional view of a rapid hole-forming machine for prestressed anchor cables in deep sand layers according to this utility model.

[0023] Figure 3 This is a perspective view of the rotating disk of a rapid hole-forming machine for prestressed anchor cables in deep sand layers according to this utility model.

[0024] Figure 4 This is a structural diagram of the spiral drill bit of a rapid hole-forming machine for prestressed anchor cables in deep sand layers according to this utility model;

[0025] Figure 5 This is a three-dimensional view of the hollow drill bit of a rapid hole-forming machine for prestressed anchor cables in deep sand layers according to this utility model;

[0026] Figure 6 This is a three-dimensional view of the assembled casing and assembled hollow drill rod of a rapid drilling machine for prestressed anchor cables in deep sand layers according to this utility model.

[0027] Reference numerals in the attached drawings: 1. Water drill body; 2. Rotary disc; 3. Fixed sleeve; 4. Fixed hollow drill rod; 5. Assembled sleeve; 6. Assembled hollow drill rod; 7. Hollow drill bit; 8. Spiral drill bit; 9. Return chamber; 10. Transition pipe; 11. High-pressure water pipe; 201. Water passage hole; 202. Flow passage hole; 801. Water flow punch hole; 802. Diversion oblique hole; 1001. Water outlet. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] like Figures 1-6 As shown, a rapid drilling machine for prestressed anchor cables in deep sand layers in this embodiment includes a water drill body 1. A transition pipe 10 is fixedly connected to the output end of the water drill body 1. A rotating disk 2 is welded and fixed to the other end of the transition pipe 10. A water passage hole 201 is opened in the center of the rotating disk 2. A high-pressure water pipe 11 is rotatably connected to the inner wall of the water passage hole 201 through a rotary joint.

[0030] A fixed sleeve 3 and a fixed hollow drill rod 4 are fixedly connected to the surface of the rotating disk 2 away from the surface of the water drilling rig body 1. The high-pressure water pipe 11 is connected to the fixed hollow drill rod 4. The fixed sleeve 3 surrounds the fixed hollow drill rod 4. The fixed sleeve 3 and the assembled sleeve 5 form a double-layer protective wall structure, which not only restrains the vibration of the drill bit but also prevents the hole wall from collapsing, ensuring the quality of the hole. The end of the fixed sleeve 3 is threaded to the assembled sleeve 5. The end of the fixed hollow drill rod 4 is threaded to the assembled hollow drill rod 6. The end of the assembled sleeve 5 is threaded to the hollow drill bit 7. The end of the assembled hollow drill rod 6 is threaded to the spiral drill bit 8. The two drill bits are combined. The spiral drill bit 8 achieves active cutting through spiral blades. Combined with the impact of high-pressure water flow, it forms a dual effect of mechanical crushing and water erosion, which is especially suitable for rapid penetration of loose sand layers. The centers of the spiral drill bit 8 and the hollow drill bit 7 are both located on the rotation axis of the water drilling rig body 1, ensuring accurate drilling trajectory, avoiding deviation, and meeting the high requirements of prestressed anchor cables for hole diameter accuracy.

[0031] The system includes several sets of hollow drill rods 6 and casings 5. The ends of the hollow drill rods 6 and 5 are threaded to fit the top and bottom threads, respectively. Multiple sections can be connected in series, and the number of sections can be increased or decreased as needed to flexibly adjust the length, making it suitable for sand layers of varying thicknesses. This avoids frequent machine relocation, significantly improving the efficiency of deep hole drilling. The segmented structure also makes transportation and storage more convenient, and on-site assembly saves time and manpower. During assembly, the hollow drill rods 6 and casings 5 ​​can be added or removed simply by driving the rotary table 2 forward and backward via the water drill body 1, making assembly convenient.

[0032] The connecting end of the hollow drill bit 7 is threaded to the end of the fixed hollow drill rod 4, and the connecting end of the auger drill bit 8 is threaded to the end of the fixed casing 3, enabling quick replacement of drill bits of different specifications to adapt to diverse geological conditions. Furthermore, without the addition of the assembly casing 5 and the assembly hollow drill rod 6, the device can be installed and connected with the hollow drill bit 7 and the auger drill bit 8, further improving the applicability of the device.

[0033] The gap between the fixed sleeve 3, the assembled sleeve 5 and the assembled hollow drill rod 6 and the fixed hollow drill rod 4 is set as the reflux chamber 9. When the device is running, the negative pressure effect formed by the reflux chamber 9 forces the slag-containing water to flow out along the predetermined path, eliminating the "drill sticking" phenomenon common in traditional drilling, preventing blockage, and maintaining high-efficiency cutting performance.

[0034] The surface of the rotating disk 2 has several flow holes 202 around the water passage 201. The flow holes 202 are connected to the return cavity 9. The transition pipe 10 surrounds the flow holes 202, and the side wall of the transition pipe 10 has a water outlet 1001. The slag-containing water in the return cavity 9 flows into the transition pipe 10 through the flow holes 202 and is then discharged through the water outlet 1001. This facilitates the recycling and reuse of water resources, improves resource utilization, and reduces operating costs. The water passage 201, flow holes 202, and water outlet 1001 form a closed-loop water circuit, enabling real-time cooling of the drill bit, flushing of residual sand particles on the borehole wall, and carrying rock powder back to the surface, effectively preventing stuck drill and buried drill accidents.

[0035] The spiral drill bit 8 is located inside the assembled casing 5. A water flow perforation hole 801 is radially formed at the center of the spiral drill bit 8, and a diversion angled hole 802 is formed on the side wall of the spiral drill bit 8. The diversion angled hole 802 communicates with the water flow perforation hole 801, optimizing the water flow distribution and allowing high-pressure water to directly act on the cutting surface, softening the sand layer, assisting drilling, and improving efficiency. The spiral shape helps improve slag removal capacity and prevents repeated grinding of already crushed material. The casing accompanies the drill rod during drilling, effectively reducing interference from the drill rod and water flow to the surrounding hole wall, thus significantly preventing hole collapse that may occur during drilling.

[0036] The working principle of this embodiment is as follows: When in use, the assembled hollow drill rod 6 and the assembled sleeve 5 are assembled according to the thickness of the sand layer. During assembly, the assembled hollow drill rod 6 is connected to the fixed hollow drill rod 4, and the assembled sleeve 5 is connected to the fixed sleeve 3. The water drill body 1 drives the rotating disk 2 to rotate in the forward direction to achieve the increase of sections.

[0037] During drilling, the auger bit 8 and the hollow bit 7 rotate synchronously to drill through the sand layer. The high-pressure water flow from the high-pressure water pipe 11 is ejected through the diversion inclined hole 802. The impact force of the high-pressure water flow, together with the auger bit 8, penetrates the sand layer. The casing, along with the drill rod, blocks the water flow, reducing the interference of the drill rod and water flow on the surrounding area of ​​the hole wall, ensuring the fullness and quality of the grouting, and further improving the bonding strength between the stratum and the grouting body, thus increasing the hole formation rate.

[0038] Excess water flows into the transition pipe 10 through the return chamber 9 and the flow passage 202, and is then discharged through the outlet 1001, which facilitates the recycling and reuse of water resources and improves resource utilization.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A fast hole-forming machine for prestressed anchor cables in deep sand layers, comprising a water drill machine body (1), characterized in that: The output end of the water drill body (1) is fixedly connected to a transition pipe (10), and the other end of the transition pipe (10) is welded and fixed to a rotating disk (2). A water passage hole (201) is opened in the center of the rotating disk (2), and a high-pressure water pipe (11) is rotatably connected to the inner wall of the water passage hole (201) through a rotary joint. The rotating disk (2) is fixedly connected to a fixed sleeve (3) and a fixed hollow drill rod (4) on the surface away from the water drill body (1). The high-pressure water pipe (11) is connected to the fixed hollow drill rod (4). The fixed sleeve (3) surrounds the fixed hollow drill rod (4). The end of the fixed sleeve (3) is threadedly connected to an assembly sleeve (5). The end of the fixed hollow drill rod (4) is threadedly connected to an assembly hollow drill rod (6). The end of the assembly sleeve (5) is threadedly connected to a hollow drill bit (7). The end of the assembly hollow drill rod (6) is threadedly connected to a spiral drill bit (8). The centers of the spiral drill bit (8) and the hollow drill bit (7) are both located on the rotation axis of the water drill body (1).

2. The rapid hole-forming machine for prestressed anchor cables in deep sand layers according to claim 1, characterized in that, The assembled hollow drill rod (6) and the assembled sleeve (5) are provided in several units. The end of the assembled hollow drill rod (6) is adapted to the top thread, and the end of the assembled sleeve (5) is adapted to the top thread.

3. The rapid hole-forming machine for prestressed anchor cables in deep sand layers according to claim 1, characterized in that, The connecting end of the hollow drill bit (7) is threaded to the end of the fixed hollow drill rod (4), and the connecting end of the spiral drill bit (8) is threaded to the end of the fixed sleeve (3).

4. The rapid hole-forming machine for prestressed anchor cables in deep sand layers according to claim 1, characterized in that, The gap between the fixed sleeve (3), the assembled sleeve (5), the assembled hollow drill rod (6), and the fixed hollow drill rod (4) is set as a reflux cavity (9).

5. The rapid hole-forming machine for prestressed anchor cables in deep sand layers according to claim 1, characterized in that, The surface of the rotating disk (2) is provided with a plurality of flow holes (202) around the water passage hole (201). The flow holes (202) are connected to the return cavity (9). The transition pipe (10) surrounds the flow holes (202). The side wall of the transition pipe (10) is provided with a water outlet (1001).

6. The rapid hole-forming machine for prestressed anchor cables in deep sand layers according to claim 1, characterized in that, The spiral drill bit (8) is located inside the assembly sleeve (5). A water flow punch (801) is radially opened in the center of the spiral drill bit (8). A diversion oblique hole (802) is opened on the side wall of the spiral drill bit (8). The diversion oblique hole (802) is connected to the water flow punch (801).

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