A construction method for an adjustable water drill bracket for tunnel section excavation

Abstract

The present invention discloses a method for constructing an adjustable water drill support for tunnel cross-section excavation, comprising the steps of: 1. fabricating the adjustable water drill support; 2. installing the adjustable water drill support; 3. adjusting the adjustable water drill support; and 4. rotating and adjusting the first and second supports and performing drilling. The method has simple steps, a rational design, and convenient operation, and is suitable for constructing a circle of holes in a tunnel cross-section. The support does not need to be disassembled within the same tunnel cross-section, thus saving labor costs for disassembly, reducing costs, and improving construction efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of water drill supports, and in particular relates to a construction method of an adjustable water drill support for tunnel section excavation. Background Art

[0002] With the continuous development of society and the increasing strengthening of national infrastructure, along with the advent of green environmental protection and energy conservation, the need for the reconstruction and re-laying of pipelines has become paramount. This requires drilling holes in walls or rock masses for the passage of pipelines. Existing technologies struggle to create circular or elliptical holes or complex drilling arrangements for drill supports. Alternatively, expansion bolts are used to secure the drill supports. This method requires multiple bolting and removal, resulting in tedious work, high labor costs, slow speeds, and low efficiency, seriously impacting construction progress.

[0003] For some short-distance hard surrounding rock jacking construction, the cost of choosing water drilling excavation is much lower than shield machine construction. However, in terms of current technology, the primary task of water drilling excavation is to solve the problem of frequent disassembly of the support. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a method for constructing an adjustable water drill bracket for tunnel section excavation. The method has simple steps, reasonable design and convenient operation, so as to adapt to the construction of a circle of drilling holes in the tunnel section. The bracket does not need to be disassembled within the same tunnel section, which saves labor costs for disassembly, saves costs, and improves construction efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a construction method of an adjustable water drill support for tunnel section excavation, characterized in that the method comprises the following steps:

[0006] Step 1: Making the adjustable rhinestone bracket:

[0007] Step 101: Make a vertical pole component; wherein a jack is provided at the bottom of the vertical pole component;

[0008] Step 102: Install a vertical adjustment component on the vertical upright component; wherein the vertical adjustment component is connected to a horizontal rod, and a cantilever rod is connected to the middle of the horizontal rod;

[0009] Step 103: Install a first bracket for mounting a first water rhinestone and a second bracket for mounting a second water rhinestone on the cantilever rod to form an adjustable water rhinestone bracket; wherein the first bracket and the second bracket are both rotatable around the circumference of the cantilever rod;

[0010] Step 2: Install the adjustable rhinestone bracket:

[0011] An adjustable water drill bracket is installed in the tunnel section excavation area; wherein the bottom of the jack in the adjustable water drill bracket is installed in the tunnel section excavation area through a steel plate;

[0012] Step 3: Adjust the adjustable rhinestone bracket;

[0013] Step 301: Adjust the jack and the vertical pole component so that the top of the vertical pole component is supported on the top of the tunnel section excavation area;

[0014] Step 302: Use the vertical adjustment component to adjust the horizontal rod to move along the height direction of the vertical upright rod component until the horizontal rod is adjusted to the designed height position;

[0015] Step 303: Adjust the adjusting members at both ends of the horizontal rod so that both ends of the horizontal rod are supported on the sides of the tunnel section excavation area;

[0016] Step 4: Rotation adjustment and drilling of the first and second brackets:

[0017] Step 401: The first bracket and the second bracket are rotated around the circumference of the cantilever rod until they reach the designed drilling position of the tunnel section;

[0018] Step 402: Install a first water drill on the first bracket and install a second water drill on the second bracket to perform drilling.

[0019] Step 403: Then operate the first bracket and the second bracket to rotate around the circumference of the cantilever rod until the next tunnel section design position is reached for drilling, until the drilling of the entire tunnel section is completed.

[0020] The above-mentioned method for constructing an adjustable water drill bracket for tunnel cross-section excavation is characterized in that: a top mounting plate is provided on the top of the jack, the vertical upright member comprises an outer square sleeve provided on the top mounting plate and an inner square rod with a lower end extending into the outer square sleeve, the outer square sleeve is provided with a plurality of adjustment holes in the height direction, and the inner square rod is provided with a connection hole;

[0021] A top fine-tuning piece is provided at the top of the inner square rod, and the top fine-tuning piece includes a top adjusting bolt passing through the top of the inner square rod, a top adjusting nut sleeved on the top adjusting bolt and fitted to the top of the inner square rod, and a supporting top plate installed on the top of the top adjusting bolt.

[0022] The above-mentioned method for constructing an adjustable water drill support for tunnel section excavation is characterized in that: in step 301, the jack and the vertical pole component are adjusted so that the top of the vertical pole component is supported on the top of the tunnel section excavation area. The specific process is as follows:

[0023] Step 3011: When the extension length of the inner square rod is adjusted to the desired position, the adjustment hole corresponds to the connection hole, and bolts are inserted into the adjustment hole and the connection hole to form a fixed connection;

[0024] Step 3012: Adjust the jack to drive the outer square sleeve and the inner square rod to move upward and downward as a whole, so that the top height of the inner square rod meets the top design position;

[0025] Step 3013: Screw the top adjustment nut to adjust the height of the top adjustment bolt until the top adjustment bolt drives the top plate to support the top of the tunnel section excavation area.

[0026] The above-mentioned construction method of an adjustable water drill bracket for tunnel section excavation is characterized in that: the vertical adjustment component includes a motor arranged on the top mounting plate, a vertical screw rod drivingly connected to the output shaft of the motor, and a nut slider sleeved on the vertical screw rod;

[0027] The side of the outer square sleeve close to the horizontal rod is provided with a sliding groove for installing the vertical screw rod, the nut slider is embedded in the sliding groove, and the top of the sliding groove is provided with a bearing for rotating installation of the top of the vertical screw rod, and the nut slider is fixedly connected to the middle part of the horizontal rod.

[0028] The above-mentioned construction method of an adjustable water drill support for tunnel section excavation is characterized in that: in step 302, the horizontal rod is adjusted to move along the height direction of the vertical upright rod component by the vertical adjustment component, and the specific process is as follows:

[0029] The rotation of the motor drives the vertical screw rod to rotate, and the rotation of the vertical screw rod drives the nut slider to slide along the height direction of the vertical screw rod. In the process of the nut slider sliding along the height direction of the vertical screw rod, it drives the horizontal rod to rise and fall until the horizontal rod is adjusted to the designed height position.

[0030] The above-mentioned method for constructing an adjustable water drill bracket for tunnel cross-section excavation is characterized in that: the first bracket and the second bracket have the same structure, and each of the first bracket and the second bracket includes a turntable sleeved on a cantilever rod, a flange connected to the turntable, and a telescopic rod connected to the turntable, as well as a mounting shaft provided at the end of the telescopic rod and a mounting plate mounted on the mounting shaft, wherein a locking nut is provided at the protruding end of the mounting shaft;

[0031] A fixing plate is provided on the cantilever rod.

[0032] The above-mentioned construction method of an adjustable water drill support for tunnel section excavation is characterized in that: in step 401, the first support and the second support are both rotated around the circumference of the cantilever rod until the tunnel section drilling position is reached. The specific process is as follows:

[0033] Step 4011: Release the locking of the fixed plate and the flange, rotate the rotating plate and the flange around the cantilever rod until they are rotated into place, and then lock the fixed plate and the flange;

[0034] Step 4012: Adjust the length of the telescopic rod to meet the designed drilling radius of the tunnel section;

[0035] Step 4013: Release the locking nut to rotate the mounting plate around the mounting axis until the mounting plate is horizontally arranged, and then tighten the locking nut.

[0036] Step 4014: Install a water drill on the mounting plate to perform construction drilling;

[0037] Step 4015: Complete the drilling of one circle of the entire cross section according to the method described in steps 4011 to 4014;

[0038] Step 4016: Operate the telescopic rod to retract and rotate, and drill a pre-crack hole in the middle area of ​​the tunnel section according to the method described in steps 4011 to 4014.

[0039] The above-mentioned construction method of an adjustable water drill support for tunnel section excavation is characterized in that: the adjusting member includes a horizontal adjustment bolt passing through the end of the horizontal rod, a horizontal adjustment nut sleeved on the horizontal adjustment bolt and abutting the end of the horizontal rod, and a support side plate installed at the end of the horizontal adjustment bolt;

[0040] In step 303, the adjusting members at both ends of the horizontal rod are adjusted so that both ends of the horizontal rod are supported on the sides of the tunnel section excavation area. The specific process is as follows:

[0041] Adjust the length of the horizontal adjustment bolt by screwing the horizontal adjustment nut until the horizontal adjustment bolt drives the side plate to support the side of the tunnel section excavation area.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] 1. The present invention can complete all drilling work in the entire tunnel section at the same time. There is no need to dismantle the bracket in the same tunnel section, which can save dismantling labor costs and save costs.

[0044] 2. The present invention can satisfy the simultaneous operation of two water drills, thereby improving construction efficiency and accelerating construction progress.

[0045] 3. The present invention can meet the requirements of efficient drilling operations under complex conditions and can realize circular and elliptical cross-section drilling and excavation.

[0046] 4. The present invention adjusts the jack and the vertical pole components so that the top of the vertical pole components is supported on the top of the tunnel section excavation area; adjusts the two ends of the horizontal rod so that the two ends of the horizontal rod are supported on the side of the tunnel section excavation area, thereby improving the stability of the frame during water drilling construction.

[0047] 5. The present invention provides vertical pole components and jacks as well as adjustment pieces at both ends of the horizontal pole, thereby improving the adaptability of the adjustable water drill bracket.

[0048] In summary, the method of the present invention has simple steps, reasonable design and easy operation, which is suitable for the construction of a circle of drilling holes in the tunnel section. There is no need to dismantle the bracket in the same tunnel section, which saves dismantling labor costs, saves costs, and improves construction efficiency.

[0049] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a structural diagram of the present invention without the first bracket and the second bracket.

[0051] Figure 2 It is a schematic structural diagram of the first bracket, the second bracket, the cantilever rod and the horizontal rod of the present invention.

[0052] Figure 3 It is a flowchart of the present invention.

[0053] Description of the accompanying drawings:

[0054] 1—Jack; 1-1—Top mounting plate;

[0055] 2—Vertical pole component; 2-1—External square sleeve; 2-2—Adjustment hole;

[0056] 2-3—Inner square rod; 2-4—Top adjustment nut; 2-5—Top adjustment bolt;

[0057] 2-6—supporting top plate; 3—vertical adjustment component; 3-1—motor;

[0058] 3-3—Vertical screw rod; 3-4—Nut slider;

[0059] 4—horizontal rod; 5—cantilever rod; 6—first bracket;

[0060] 6-1—rotating plate; 6-2—flange plate; 6-3—fixed plate;

[0061] 6-4—Telescopic rod; 6-5—Mounting shaft; 6-6—Mounting plate;

[0062] 6-7—Locking nut; 7—Second bracket. DETAILED DESCRIPTION

[0063] like Figure 1 and Figure 2 As shown, the present invention, the method comprises the following steps:

[0064] Step 1: Making the adjustable rhinestone bracket:

[0065] Step 101: Prepare a vertical pole component 2; wherein a jack 1 is provided at the bottom of the vertical pole component 2;

[0066] Step 102: Install the vertical adjustment component 3 on the vertical upright component 2; wherein the vertical adjustment component 3 is connected to the horizontal rod 4, and the middle of the horizontal rod 4 is connected to the cantilever rod 5;

[0067] Step 103: Install a first bracket 6 for mounting a first rhinestone and a second bracket 7 for mounting a second rhinestone on the cantilever rod 5 to form an adjustable rhinestone bracket; wherein the first bracket 6 and the second bracket 7 can both rotate around the circumference of the cantilever rod 5;

[0068] Step 2: Install the adjustable rhinestone bracket:

[0069] An adjustable water drill bracket is installed in the tunnel section excavation area; wherein the bottom of the jack 1 in the adjustable water drill bracket is installed in the tunnel section excavation area through a steel plate;

[0070] Step 3: Adjust the adjustable rhinestone bracket;

[0071] Step 301: Adjust the jack 1 and the vertical pole component 2 so that the top of the vertical pole component 2 is supported on the top of the tunnel section excavation area;

[0072] Step 302: Use the vertical adjustment component 3 to adjust the horizontal rod 4 to move along the height direction of the vertical upright component 2 until the horizontal rod 4 is adjusted to the designed height position;

[0073] Step 303: Adjust the adjusting pieces at both ends of the horizontal rod 4 so that both ends of the horizontal rod 4 are supported on the sides of the tunnel section excavation area;

[0074] Step 4: Rotation adjustment and drilling of the first and second brackets:

[0075] Step 401: The first bracket 6 and the second bracket 7 are both rotated around the cantilever rod 5 in a circumferential direction until they reach the designed drilling position of the tunnel section;

[0076] Step 402: Install a first water drill on the first bracket 6 and install a second water drill on the second bracket 7 to perform drilling.

[0077] Step 403: Then operate the first bracket 6 and the second bracket 7 to rotate around the circumferential direction of the cantilever rod 5 until the next tunnel section design position is reached for drilling, until the drilling of the entire tunnel section is completed.

[0078] In this embodiment, a top mounting plate 1-1 is provided on the top of the jack 1. The vertical rod component 2 includes an outer square sleeve 2-1 provided on the top mounting plate 1-1 and an inner square rod 2-3 whose lower end extends into the outer square sleeve 2-1. The outer square sleeve 2-1 is provided with a plurality of adjustment holes 2-2 in the height direction, and the inner square rod 2-3 is provided with a connection hole.

[0079] A top fine-tuning part is provided at the top of the inner square rod 2-3, and the top fine-tuning part includes a top adjusting bolt 2-5 passed through the top of the inner square rod 2-3, a top adjusting nut 2-4 sleeved on the top adjusting bolt 2-5 and fitted to the top of the inner square rod 2-3, and a supporting top plate 2-6 installed on the top of the top adjusting bolt 2-5.

[0080] In this embodiment, in step 301, the jack 1 and the vertical pole member 2 are adjusted so that the top of the vertical pole member 2 is supported on the top of the tunnel section excavation area. The specific process is as follows:

[0081] Step 3011: When the extension length of the inner square rod 2-3 is adjusted to the desired position, the adjustment hole 2-2 corresponds to the connection hole, and a bolt is inserted into the adjustment hole 2-2 to position and connect the connection hole;

[0082] Step 3012: Adjust the jack 1 to drive the outer square sleeve 2-1 and the inner square rod 2-3 to move upward and downward as a whole, so that the top height of the inner square rod 2-3 meets the top design position;

[0083] Step 3013: Screw the top adjustment nut 2-4 to adjust the height of the top adjustment bolt 2-5 until the top adjustment bolt 2-5 drives the top support plate 2-6 to support the top of the tunnel section excavation area.

[0084] In this embodiment, the vertical adjustment component 3 includes a motor 3-1 provided on the top mounting plate 1-1, a vertical screw rod 3-3 drivingly connected to the output shaft of the motor 3-1, and a nut slider 3-4 sleeved on the vertical screw rod 3-3;

[0085] The side of the outer square sleeve 2-1 close to the horizontal rod 4 is provided with a slide groove for installing the vertical screw rod 3-3, the nut slider 3-4 is embedded in the slide groove, and the top of the slide groove is provided with a bearing for rotating installation of the top of the vertical screw rod 3-3, and the nut slider 3-4 is fixedly connected to the middle part of the horizontal rod 4.

[0086] In this embodiment, in step 302, the horizontal rod 4 is adjusted to move along the height direction of the vertical upright rod component 2 by the vertical adjustment component 3. The specific process is as follows:

[0087] The rotation of motor 3-1 drives the vertical screw rod 3-3 to rotate, and the rotation of vertical screw rod 3-3 drives the nut slider 3-4 to slide along the height direction of vertical screw rod 3-3. In the process of the nut slider 3-4 sliding along the height direction of vertical screw rod 3-3, it drives the horizontal rod 4 to rise and fall until the horizontal rod 4 is adjusted to the designed height position.

[0088] In this embodiment, the first bracket 6 and the second bracket 7 have the same structure. They both include a turntable 6-1 sleeved on the cantilever rod 5, a flange 6-2 connected to the turntable 6-1, a telescopic rod 6-4 connected to the turntable 6-1, a mounting shaft 6-5 provided at the end of the telescopic rod 6-4, and a mounting plate 6-6 mounted on the mounting shaft 6-5. A locking nut 6-7 is provided at the protruding end of the mounting shaft 6-5.

[0089] A fixing plate 6 - 3 is provided on the cantilever rod 5 .

[0090] In this embodiment, in step 401, the first bracket 6 and the second bracket 7 are both rotated around the cantilever rod 5 in the circumferential direction until they reach the designed drilling position of the tunnel section. The specific process is as follows:

[0091] Step 4011: Release the locking of the fixed plate 6-3 and the flange 6-2, rotate the rotating plate 6-1 and the flange 6-2 around the cantilever rod 5 until they are rotated into place, and then lock the fixed plate 6-3 and the flange 6-2;

[0092] Step 4012: Adjust the length of the telescopic rod 6-4 to meet the designed radius of the tunnel section drilling;

[0093] Step 4013: Release the locking nut 6-7 to rotate the mounting plate 6-6 around the mounting axis 6-5 until the mounting plate 6-6 is arranged horizontally, and then tighten the locking nut 6-7;

[0094] Step 4014: Install a water drill on the mounting plate 6-6 to perform construction drilling;

[0095] Step 4015: Complete the drilling of one circle of the entire cross section according to the method described in steps 4011 to 4014;

[0096] Step 4016: Operate the telescopic rod 6-4 to retract and rotate, and drill a pre-crack hole in the middle area of ​​the tunnel section according to the method described in steps 4011 to 4014.

[0097] In this embodiment, the adjusting member includes a horizontal adjusting bolt 4-5 passing through the end of the horizontal rod 4, a horizontal adjusting nut 4-4 sleeved on the horizontal adjusting bolt 4-5 and fitted on the end of the horizontal rod 4, and a supporting side plate 4-6 installed on the end of the horizontal adjusting bolt 4-5;

[0098] In step 303, the adjusting members at both ends of the horizontal rod 4 are adjusted so that both ends of the horizontal rod 4 are supported on the sides of the tunnel section excavation area. The specific process is as follows:

[0099] The horizontal adjustment nut 4-4 is screwed to adjust the length of the horizontal adjustment bolt 4-5 until the horizontal adjustment bolt 4-5 drives the support side plate 4-6 to support the side of the tunnel section excavation area.

[0100] In this embodiment, the device can complete all drilling work in the entire tunnel section. There is no need to dismantle the bracket in the same tunnel section, which can save dismantling labor costs and save costs.

[0101] In this embodiment, the device can meet the needs of two water drills operating simultaneously, thereby improving construction efficiency and accelerating construction progress.

[0102] In this embodiment, the device can meet the requirements of efficient drilling operations under complex conditions and can realize circular and elliptical cross-section drilling and excavation.

[0103] In this embodiment, the device is simple to manufacture and easy to operate.

[0104] In this embodiment, after the drilling construction is completed, a splitting rod is installed in the pre-split hole using static blasting technology, and a hydraulic press is used to provide power to crack and break the rock mass; and the cracked rock blocks are transported out of the tunnel by manual labor and a wheelbarrow.

[0105] In summary, the method of the present invention has simple steps, reasonable design and easy operation, which is suitable for the construction of a circle of drilling holes in the tunnel section. There is no need to dismantle the bracket in the same tunnel section, which saves dismantling labor costs, saves costs, and improves construction efficiency.

[0106] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A construction method for an adjustable water drill support for tunnel section excavation, characterized in that: The method comprises the following steps: Step 1: Making the adjustable rhinestone bracket: Step 101: manufacturing a vertical pole component (2); wherein a jack (1) is provided at the bottom of the vertical pole component (2); Step 102: Install a vertical adjustment component (3) on the vertical upright component (2); wherein the vertical adjustment component (3) is connected to a horizontal rod (4), and a cantilever rod (5) is connected to the middle of the horizontal rod (4); Step 103: Install a first bracket (6) for mounting a first water rhinestone and a second bracket (7) for mounting a second water rhinestone on the cantilever rod (5) to form an adjustable water rhinestone bracket; wherein both the first bracket (6) and the second bracket (7) can rotate around the circumference of the cantilever rod (5); Step 2: Install the adjustable rhinestone bracket: An adjustable water drill bracket is installed in the tunnel section excavation area; wherein the bottom of the jack (1) in the adjustable water drill bracket is installed in the tunnel section excavation area through a steel pad; Step 3: Adjust the adjustable rhinestone bracket; Step 301, adjusting the jack (1) and the vertical pole component (2) so that the top of the vertical pole component (2) is supported on the top of the tunnel section excavation area; Step 302: adjusting the horizontal rod (4) to move along the height direction of the vertical upright rod component (2) through the vertical adjustment component (3) until the horizontal rod (4) is adjusted to the designed height position; Step 303, adjusting the adjusting pieces at both ends of the horizontal rod (4) so ​​that both ends of the horizontal rod (4) are supported on the side of the tunnel section excavation area; Step 4: Rotation adjustment and drilling of the first and second brackets: Step 401: The first bracket (6) and the second bracket (7) are both rotated around the cantilever rod (5) in a circumferential direction until they reach the designed drilling position of the tunnel section; Step 402: Install a first water drill on the first bracket (6), and install a second water drill on the second bracket (7) to perform drilling; Step 403, then operate the first bracket (6) and the second bracket (7) to rotate around the cantilever rod (5) in a circumferential direction until the next tunnel section design position is reached for drilling, until the drilling of the entire tunnel section is completed; The first bracket (6) and the second bracket (7) have the same structure. The first bracket (6) and the second bracket (7) both comprise a turntable (6-1) sleeved on the cantilever rod (5), a flange (6-2) connected to the turntable (6-1), a telescopic rod (6-4) connected to the turntable (6-1), a mounting shaft (6-5) arranged at the end of the telescopic rod (6-4), and a mounting plate (6-6) mounted on the mounting shaft (6-5). A locking nut (6-7) is provided at the protruding end of the mounting shaft (6-5). A fixing plate (6-3) is provided on the cantilever rod (5).

2. A method for constructing an adjustable water drill support for tunnel section excavation according to claim 1, characterized in that: The top of the jack (1) is provided with a top mounting plate (1-1), and the vertical pole component (2) comprises an outer square sleeve (2-1) provided on the top mounting plate (1-1) and an inner square rod (2-3) whose lower end extends into the outer square sleeve (2-1), a plurality of adjustment holes (2-2) are provided in the height direction of the outer square sleeve (2-1), and a connection hole is provided on the inner square rod (2-3); A top fine-tuning member is provided at the top of the inner square rod (2-3), comprising a top adjusting bolt (2-5) passing through the top of the inner square rod (2-3), a top adjusting nut (2-4) sleeved on the top adjusting bolt (2-5) and fitted to the top of the inner square rod (2-3), and a top supporting plate (2-6) mounted on the top of the top adjusting bolt (2-5).

3. A method for constructing an adjustable water drill support for tunnel section excavation according to claim 2, characterized in that: In step 301, the jack (1) and the vertical pole component (2) are adjusted so that the top of the vertical pole component (2) is supported on the top of the tunnel section excavation area. The specific process is as follows: Step 3011: When the extension length of the inner square rod (2-3) is adjusted to the right position, the adjustment hole (2-2) corresponds to the connecting hole, and a bolt is inserted into the adjustment hole (2-2) and the connecting hole for positioning connection; Step 3012: adjusting the jack (1) to drive the outer square sleeve (2-1) and the inner square rod (2-3) to move upward and downward as a whole, so that the top height of the inner square rod (2-3) meets the top design position; Step 3013: Screw the top adjustment nut (2-4) to adjust the height of the top adjustment bolt (2-5) until the top adjustment bolt (2-5) drives the top support plate (2-6) to support the top of the tunnel section excavation area.

4. A method for constructing an adjustable water drill support for tunnel section excavation according to claim 2, characterized in that: The vertical adjustment component (3) comprises a motor (3-1) arranged on the top mounting plate (1-1), a vertical screw rod (3-3) drivingly connected to the output shaft of the motor (3-1), and a nut slider (3-4) sleeved on the vertical screw rod (3-3); A sliding groove for mounting the vertical screw rod (3-3) is provided on the side of the outer square sleeve (2-1) close to the horizontal rod (4); the nut slider (3-4) is embedded in the sliding groove; a bearing for rotatably mounting the top of the vertical screw rod (3-3) is provided in the top of the sliding groove; the nut slider (3-4) is fixedly connected to the middle of the horizontal rod (4).

5. A method for constructing an adjustable water drill support for tunnel section excavation according to claim 4, characterized in that: In step 302, the horizontal rod (4) is adjusted to move along the height direction of the vertical upright rod component (2) by means of the vertical adjustment component (3). The specific process is as follows: The motor (3-1) rotates to drive the vertical screw rod (3-3) to rotate, and the vertical screw rod (3-3) rotates to drive the nut slider (3-4) to slide along the height direction of the vertical screw rod (3-3). During the process of the nut slider (3-4) sliding along the height direction of the vertical screw rod (3-3), the horizontal rod (4) is driven to rise and fall until the horizontal rod (4) is adjusted to the designed height position.

6. The method for constructing an adjustable water drill support for tunnel section excavation according to claim 1, characterized in that: In step 401, the first bracket (6) and the second bracket (7) are both rotated around the cantilever rod (5) in a circumferential direction until they reach the designed drilling position of the tunnel section. The specific process is as follows: Step 4011, release the locking of the fixed plate (6-3) and the flange (6-2), rotate the rotating plate (6-1) and the flange (6-2) around the cantilever rod (5) until they are rotated into place, and then lock the fixed plate (6-3) and the flange (6-2); Step 4012: Adjust the length of the telescopic rod (6-4) to meet the designed radius of the tunnel section drilling; Step 4013: Release the locking nut (6-7) to rotate the mounting plate (6-6) around the mounting axis (6-5) until the mounting plate (6-6) is arranged horizontally, and tighten the locking nut (6-7); Step 4014: Install a water drill on the mounting plate (6-6) to perform construction drilling; Step 4015: Complete the drilling of one circle of the entire cross section according to the method described in steps 4011 to 4014; Step 4016: Operate the telescopic rod (6-4) to retract and rotate, and drill a pre-crack hole in the middle area of ​​the tunnel section according to the method described in steps 4011 to 4014.

7. The method for constructing an adjustable water drill support for tunnel section excavation according to claim 1, characterized in that: The adjusting member comprises a horizontal adjusting bolt (4-5) passing through the end of the horizontal rod (4), a horizontal adjusting nut (4-4) sleeved on the horizontal adjusting bolt (4-5) and abutting the end of the horizontal rod (4), and a supporting side plate (4-6) mounted on the end of the horizontal adjusting bolt (4-5); In step 303, the adjusting pieces at both ends of the horizontal rod (4) are adjusted so that both ends of the horizontal rod (4) are supported on the side of the tunnel section excavation area. The specific process is as follows: The horizontal adjustment nut (4-4) is screwed to adjust the length of the horizontal adjustment bolt (4-5) until the horizontal adjustment bolt (4-5) drives the support side plate (4-6) to support the side of the tunnel section excavation area.

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