Device for inserting and driving steel casing of rotary drilling rig and construction method of device

Abstract

The invention discloses a device for inserting and driving a steel casing by a rotary drilling rig and a construction method thereof, and particularly relates to the field of inserting and driving the steel casing by the rotary drilling rig, the device comprises a steel casing, a rotary drilling rig is arranged in the steel casing, and a positioning block is welded on the outer surface of the rotary drilling rig; positioning grooves matched with the positioning blocks are formed in the top end of the outer surface of the steel casing, the steel casing is arranged on the outer surface of the rotary excavating drill bit in a sleeving mode, the positioning blocks are screwed into the bottom ends of the interiors of the positioning grooves, the number of the positioning blocks and the number of the positioning grooves are both four, and four sets of positioning frames are welded to the outer surface of the top end of the steel casing; a steel wire rope is arranged on the outer surface of the rotary excavating drill bit. The four positioning blocks are additionally arranged on the side face of the drill bit of the rotary drilling drill, and the open type fixing device and the positioning device are arranged on the steel casing, so that it is ensured that the drill bit can be taken out after the steel casing reaches the determined depth, section adding can also be conducted in a segmented mode, and the protection effect on the depth interval of holes or karst caves or collapsed holes is achieved.

Description

Technical Field

[0001] The present invention relates to the field of rotary drilling and steel casing insertion, and more particularly to a device for rotary drilling and steel casing insertion and a construction method thereof. Background Art

[0002] Karst landforms cover approximately 13% of China's total land area. This widespread karst landscape is primarily found in southern China, including provinces such as Yunnan, Guizhou, Guangxi, and Chongqing. Southern karst covers 50,000 square kilometers, representing 55% of China's total karst area. Pile foundations for housing construction projects often fail to drill holes properly in karst terrain, severely impacting construction progress and project costs. Currently, hydraulic vibratory pile drivers combined with full-length steel casing are commonly used in such terrain to ensure high-quality pile foundations.

[0003] When the terrain requires the use of steel casing construction, it is easy to encounter high machinery access fees and full-length steel casing costs. In addition, pulling out the steel casing can easily cause concrete sinking and serious concrete over-cubicity. The sinking of the steel cage may also cause damage to the steel cage, seriously affecting the quality and cost investment during the pile foundation construction process. Summary of the Invention

[0004] This patent specifically addresses the above-mentioned problems. It uses a device for inserting and driving steel casings with a rotary drill to measure the depth range of holes, caves or collapsed holes, and buries permanent steel casings of this length, effectively solving the cost of bringing in machinery and equipment and effectively improving the quality of pile foundation construction.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a device for inserting a rotary drill into a steel casing, comprising a steel casing, a rotary drill bit is arranged inside the steel casing, a positioning block is welded to the outer surface of the rotary drill bit, and a positioning groove matching the positioning block is provided at the top end of the outer surface of the steel casing.

[0006] Preferably, the steel casing is sleeved on the outer surface of the rotary drilling bit, and the positioning block is screwed into the inner bottom end of the positioning groove. The number of the positioning blocks and the positioning grooves are both four.

[0007] Preferably, four sets of positioning frames are welded to the outer surface of the top end of the steel casing, and a steel wire rope is provided on the outer surface of the rotary drilling drill bit.

[0008] A construction method for a rotary drilling device for inserting and driving a steel casing, comprising the following steps:

[0009] Step 1: Determine the installation location and measure the depth of the collapse hole or cave;

[0010] Step 2: Use the wire rope on the rotary drill bit to lift the steel casing;

[0011] Step 3: Use tools to open a positioning groove on the top edge of the steel casing, and weld positioning blocks around the edge of the rotary drill bit;

[0012] Step 4: Align the top positioning block of the rotary drilling bit with the top opening of the positioning groove, and then screw it in to complete the docking of the rotary drilling bit and the steel casing;

[0013] Step 5: Rotate and squeeze the rotary drill bit to insert the steel casing to the depth of the hole, cave or collapsed hole;

[0014] Step 6: When the steel casing is not long enough, reverse the rotary drill bit, remove the rotary drill bit along the positioning groove, and then repeat steps 1 to 5 to add sections and insert again;

[0015] Step 7: Position the inserted steel casing and the buried steel casing through the positioning frame, and then increase the length of the steel casing in sections until the steel casing fully plays the role of protection and isolation;

[0016] Step 8: After the steel casing is completed, the pile foundation reinforcement cage can be constructed and concrete can be poured.

[0017] Preferably, in step three, the number of openings of the positioning grooves is four, the four positioning grooves are arranged in a ring shape, and adjacent positioning grooves are 90° apart, and the number of the positioning blocks is four.

[0018] Preferably, the positioning block in step 4 is specifically a steel bar column, and the diameter of the steel bar column is φ28, and the bottom diameter of the positioning groove is 30 cm.

[0019] Preferably, in the step 5, the rotary drill bit can only rotate in one direction, the steel casing adopts a short section, and the length of the steel casing is 4m-5m.

[0020] Preferably, the positioning frame in step seven is in the shape of a bull leg.

[0021] Technical effects and advantages of the present invention:

[0022] The present invention adds four positioning blocks to the side of the rotary drilling bit and arranges an open fixing device and a positioning device on the steel casing to ensure that the drill bit can be taken out after the steel casing reaches a certain depth, and can also be segmented and sectioned, thereby playing a protective role in the depth range of holes, caves or collapsed holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the installation structure of the rotary drilling bit and the steel casing of the present invention.

[0024] Figure 2 It is a schematic diagram of the overall structure of the steel casing of the present invention.

[0025] The accompanying drawings are marked as follows: 1. steel casing; 11. positioning groove; 12. positioning frame; 2. rotary drilling bit; 21. positioning block. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] according to Figure 1-2 The device shown in the figure for inserting a steel casing with a rotary drill comprises a steel casing 1, a rotary drill bit 2 is arranged inside the steel casing 1, a positioning block 21 is welded to the outer surface of the rotary drill bit 2, a positioning groove 11 matching the positioning block 21 is opened at the top end of the outer surface of the steel casing 1, the steel casing 1 is sleeved on the outer surface of the rotary drill bit 2, the positioning block 21 is screwed into the inner bottom end of the positioning groove 11, the number of the positioning blocks 21 and the positioning groove 11 are both four groups, four groups of positioning frames 12 are welded to the outer surface of the top end of the steel casing 1, and a steel wire rope is provided on the outer surface of the rotary drill bit 2.

[0028] A construction method for a rotary drilling device for inserting and driving a steel casing, comprising the following steps:

[0029] Step 1: Determine the installation location and measure the depth of the collapse hole or cave;

[0030] Step 2: Use the wire rope on the rotary drill bit 2 to lift the steel casing 1 through the wire rope;

[0031] Step 3: Use a tool to open a positioning groove 11 on the top edge of the steel casing 1, and weld positioning blocks 21 around the edge of the rotary drill bit 2. In step 3, the number of openings of the positioning grooves 11 is four, and the four positioning grooves 11 are arranged in a ring, and adjacent positioning grooves 11 are separated by 90 degrees. The number of the positioning blocks 21 is four;

[0032] Step 4: Align the top positioning block 21 of the rotary drill bit 2 with the top opening of the positioning groove 11, and then screw it in to complete the docking of the rotary drill bit 2 and the steel casing 1. In the step 4, the positioning block 21 is specifically a steel bar column, and the diameter of the steel bar column is φ28, and the bottom diameter of the positioning groove 11 is 30 cm;

[0033] Step 5: Rotate and squeeze the rotary drill bit 2 to insert the steel casing 1 to the depth of the hole, cave or collapsed hole. In the step 5, the rotary drill bit 2 can only rotate in one direction. The steel casing 1 adopts a short section, and the length of the steel casing 1 is 4m-5m;

[0034] Step 6: When the length of the steel casing 1 is insufficient, the rotary drill bit 2 is reversed, the rotary drill bit 2 is taken out along the positioning groove 11, and then steps 1 to 5 are repeated to add sections and insert again;

[0035] Step 7: Position the inserted steel casing 1 and the buried steel casing 1 through the positioning frame 12, and increase the length of the steel casing 1 in sections until the steel casing 1 fully plays a protective and isolating role. The positioning frame 12 in step 7 is in the shape of a bull leg;

[0036] Step 8: After the steel casing 1 is completed, the pile foundation reinforcement cage can be constructed and concrete can be poured.

Claims

1. A device for drilling a steel casing with a rotary drill, comprising a steel casing (1), characterized in that: A rotary drill bit (2) is arranged inside the steel casing (1), a positioning block (21) is welded to the outer surface of the rotary drill bit (2), and a positioning groove (11) matching the positioning block (21) is opened at the top end of the outer surface of the steel casing (1).

2. The device for inserting a steel casing with a rotary drill according to claim 1, characterized in that: The steel casing (1) is sleeved on the outer surface of the rotary drill bit (2), and the positioning block (21) is screwed into the inner bottom end of the positioning groove (11). The number of the positioning block (21) and the positioning groove (11) are both four.

3. The device for driving a rotary drill into a steel casing according to claim 1, characterized in that: Four groups of positioning frames (12) are welded to the outer surface of the top end of the steel casing (1), and a steel wire rope is provided on the outer surface of the rotary drilling bit (2).

4. A construction method for a rotary drilling and steel casing driving device according to any one of claims 1 to 3, characterized in that: The steps are as follows: Step 1: Determine the installation location and measure the depth of the collapse hole or cave; Step 2: Use the wire rope on the rotary drill bit (2) to lift the steel casing (1) through the wire rope; Step 3: Use a tool to open a positioning groove (11) on the top edge of the steel casing (1), and weld positioning blocks (21) around the edge of the rotary drill bit (2); Step 4: Place the top positioning block (21) of the rotary drill bit (2) in the top opening of the positioning groove (11), and then screw it in to complete the docking of the rotary drill bit (2) and the steel casing (1); Step 5: Rotate and squeeze the rotary drill bit (2) to insert the steel casing (1) to the depth of the hole, cave or collapsed hole; Step 6: When the length of the steel casing (1) is insufficient, the rotary drill bit (2) is reversed, the rotary drill bit (2) is taken out along the positioning groove (11), and then steps 1 to 5 are repeated to insert and hit again; Step 7: Position the inserted steel casing (1) and the already buried steel casing (1) through the positioning frame (12), and then increase the length of the steel casing (1) in sections until the steel casing (1) fully plays the role of protection and isolation; Step 8: After the steel casing (1) is driven, the pile foundation reinforcement cage can be constructed and concrete can be poured.

5. The construction method of the device for inserting and driving a steel casing with a rotary drill according to claim 4, characterized in that: In the step three, the number of openings of the positioning grooves (11) is four, the four positioning grooves (11) are arranged in a ring shape, and adjacent positioning grooves (11) are spaced 90 degrees apart, and the number of the positioning blocks (21) is four.

6. The construction method of the device for driving a rotary drill into a steel casing according to claim 4, characterized in that: The positioning block (21) in step 4 is specifically a steel bar column, and the diameter of the steel bar column is φ28, and the bottom diameter of the positioning groove (11) is 30 cm.

7. The construction method of the device for driving a rotary drill into a steel casing according to claim 4, characterized in that: In the step 5, the rotary drill bit (2) can only rotate in one direction, the steel casing (1) adopts a short section, and the length of the steel casing (1) is 4m-5m.

8. The construction method of the device for driving a rotary drill into a steel casing according to claim 4, characterized in that: The positioning frame (12) in step seven is in the shape of a bull leg.

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