Hard rock tunnel static excavation rapid construction method

Abstract

The present application belongs to the technical field of tunnel excavation, and discloses a hard rock tunnel static excavation rapid construction method, comprising the following steps: step S1, lofting the excavation contour line of the tunnel face according to the control guide line in the tunnel hole, and marking the core drilling center position; step S2, using a water mill drill lifting transport vehicle to transport the water mill drill to the step on the tunnel face, and drilling and coring one by one by aligning the core drilling center position; step S3, using a splitting rod installation tool to place two splitting rods in adjacent holes respectively, and then starting to split, repeatedly filling adjacent holes from top to bottom along the tunnel face to complete the splitting of all holes; step S4, using a breaking hammer to remove the tunnel face; step S5, constructing the step below the tunnel face according to steps S2-S4, and checking and accepting. The present application has the advantages of high construction efficiency, small vibration of the overall process, greatly improved excavation construction speed, reduced tunnel overbreakage loss rate, cost saving, etc.

Description

Technical Field

[0001] This invention belongs to the field of tunnel excavation technology, specifically relating to a rapid construction method for static excavation of hard rock tunnels. Background Technology

[0002] Because water-cooled drills lack specialized lifting and transportation tools, and the core hole relocation is time-consuming, and because splitting rods can only be installed manually with the risk of falling rocks damaging machinery and personnel, water-cooled drills and splitting rods are rarely used in hard rock tunnel excavation. Traditional hydraulic breakers and cantilever tunneling machines are usually used for excavation. However, because the saturated compressive strength of hard rock is as high as 103.5 MPa to 120 MPa, direct chiseling with breakers results in low construction efficiency, high vibration that can easily affect operating equipment on the production line, and high wear and tear. Summary of the Invention

[0003] This invention aims to provide a rapid construction method for static excavation of hard rock tunnels, which has high construction efficiency and low safety risks, and solves the problems of low construction efficiency, large vibration that can easily affect operating equipment on the line, and high wear and tear associated with the current traditional excavation methods using hydraulic breakers and cantilever tunneling machines.

[0004] Therefore, the technical solution adopted in this invention is: a rapid construction method for static excavation of hard rock tunnels, comprising the following steps:

[0005] Step S1: Lay out the designed excavation outline of the tunnel face according to the control guide wire inside the tunnel, and mark the center position of the core drilling.

[0006] Step S2: Use a water-grinding drill lifting transport vehicle to transport the water-grinding drill to the step on the working face, align it with the center position of the drilling core sampling, and drill cores one by one, thereby leaving holes that intersect along the outline of the step on the working face and holes that are evenly distributed in the middle.

[0007] Step S3: Using a splitting rod installation tool, place two splitting rods in adjacent holes respectively, and then start splitting. Repeat the cycle of filling adjacent holes from top to bottom along the working face to split until all holes are split.

[0008] Step S4: Use a hydraulic breaker to chisel away the tunnel face from top to bottom along the tunnel face outline. Then, correct the core-taking edges of the water-jet drilling machine at the design outline until the excavation outline meets the design requirements.

[0009] Step S5: Construct the lower step of the working face according to steps S2-S4, and inspect and accept it after each cycle of excavation.

[0010] As a preferred embodiment of the above scheme, in step S2, the holes on the tunnel face outline intersect by 20mm to 22mm, thereby ensuring core sampling efficiency while controlling the over-excavation of the tunnel face. The holes in the middle of the tunnel face are arranged in an oblique array, and the distance between the outermost hole and the hole on the tunnel face outline is 68cm to 70cm. The spacing between adjacent holes in the horizontal row is 1000mm to 1100mm, and the spacing between adjacent holes in the vertical row is 500mm to 520mm. The size is reasonable, which can effectively ensure that the holes are evenly distributed on the tunnel face. It can effectively avoid the problem that the drilling and core sampling process is too long due to the holes being too dense, and that the cracks caused by the splitting rod cannot cover most of the tunnel face due to the holes being too sparse.

[0011] A further preferred embodiment is that, in step S2, two water-grinding drill lifting transport vehicles and corresponding water-grinding drills are symmetrically arranged on the left and right sides, respectively, to simultaneously drill and core samples on the left and right sides of the working face, effectively improving the efficiency of drilling and core sampling. The water-grinding drill lifting transport vehicles only require lifting operations and do not need to move left or right, which meets actual needs. As the amount of drill cuttings accumulated in the borehole exceeds the standard, one water-grinding drill lifting transport vehicle withdraws, making room for a wheeled excavator to enter and remove the accumulated drill cuttings from the working face. The steps are reasonable and effectively avoid the accumulation of drill cuttings from affecting subsequent construction.

[0012] Preferably, the water-grinding drill lifting transport vehicle includes a transport vehicle and a lifting platform located on the top surface of the transport vehicle. The transport vehicle's chassis is symmetrically equipped with four ground-supporting screw rods, thereby increasing the stability of the transport vehicle during water-grinding drill core sampling, meeting the requirements for foundation strength and stability, reducing shaking during water-grinding drill core sampling operations, and thus ensuring the safety and accuracy of core sampling construction. The left and right lifting platforms are connected by horizontal double-ended screw rods, and the outer side of the lifting platform is connected to the corresponding side wall by outward and upward inclined double-ended screw rods, enhancing the stability of the lifting platform.

[0013] The lifting platform includes a water-grinding drilling rig mounting platform and retractable support legs symmetrically arranged at the four corners of the bottom of the water-grinding drilling rig mounting platform. Each retractable support leg includes three square tubes that are sequentially fitted inside and outside, and two hydraulic cylinders that drive the middle section and the upper section of the square tube to lift and lower respectively. Each square tube has a row of vertically spaced mounting holes, and the connection between adjacent sections of the square tube is equipped with a pin that can pass through the corresponding mounting holes inside and outside for fixed connection. The lower section of the square tube is fixed on the transport vehicle, and the top of the upper section of the square tube is fixedly connected to the lifting platform.

[0014] Currently, drilling with a water-cooled drill requires setting up a support structure to cover the drilling area. Then, workers manually hold the water-cooled drill and move to the corresponding platform on the support structure to carry out drilling work, depending on the drilling height. If a water-cooled drill rig is used, soil needs to be piled up to form a platform for the drill rig, and the height of the soil pile needs to be constantly reduced or increased according to the drilling height. Both methods are time-consuming and labor-intensive, even more cumbersome than directly using a hydraulic breaker. Therefore, they are not suitable for the current tunnel excavation situation. Using a water-cooled drill lifting and transport vehicle to provide lifting and transporting for the water-cooled drill rig can significantly improve the drilling efficiency of the water-cooled drill rig. Through the lifting and transporting of the lifting platform, drilling can be carried out at any position on the working face, reducing manpower and material resources.

[0015] More preferably, the lower sections of the retractable support legs on the left and right are connected by a lower crossbeam mounted on a transport vehicle, and the adjacent middle sections of the four retractable support legs are connected by an upper crossbeam. The fixed end of the lower hydraulic cylinder is mounted on the transport vehicle, and the telescopic end is vertically upward and connected to the top of the middle section of the square tube, thereby driving the middle section of the square tube to rise and fall. The fixed end of the upper hydraulic cylinder is mounted on the upper crossbeam, and the telescopic end is vertically upward and connected to the lifting platform. The height of the lifting platform can be adjusted by adjusting the position of the middle section and / or the upper section of the square tube correspondingly by the hydraulic cylinder.

[0016] Preferably, the top side of the water-grinding drill platform is equipped with a wedge-shaped anti-slip device that can lock the tires of the water-grinding drill, and the bottom side is provided with an inclined support rod between it and the transport vehicle. The top of the inclined support rod is hinged to the water-grinding drill platform, and the bottom end is hinged to a slider. The transport vehicle is provided with a slide for the slider to move longitudinally, and the top of the slide has positioning holes spaced apart front and back. The slider has an installation through hole that corresponds to the positioning hole, and is equipped with a pin that passes through the installation through hole and the positioning hole for fixation. Thus, when the hydraulic cylinder drives the lifting platform to the required height, the bottom end of the inclined support rod is fixed by inserting the pin into the installation through hole and the positioning hole. The inclined support rod plays an auxiliary support role while strengthening the overall structural stability of the lifting platform.

[0017] Further preferably, the water-powered drilling rig includes a drilling body, a drill barrel for core sampling, a drive motor for rotating the drill barrel, drill teeth located at the front end of the drill barrel, and a core impact hammer placed inside the drill barrel away from the drill teeth. The core impact hammer is aligned with the front end of the core sample, thereby breaking the connection between the core sample and the parent rock by impacting the core sample. Compared with the current method of manually inserting a handheld tool into the circumferential gap between the core sample and the parent rock after cutting, and then tilting the core sample to break it from the parent rock, the method of using the core impact hammer to directly impact the end of the core sample to break it from the connection with the parent rock is convenient, quick, and simple to operate. After the drill barrel brings out the rock sample, the core impact hammer then impacts the end of the core sample to detach it from the drill barrel, thereby effectively solving the problem of core jamming in the drill barrel, ensuring construction quality, and demonstrating ingenious structural design.

[0018] Further preferably, the rock core impact hammer is a hydraulic-pneumatic hammer, and a miniature hydraulic-pneumatic hammer can be selected appropriately.

[0019] More preferably, in step S3, the two splitting rods are placed preferably in holes where there are surrounding rock fissures between adjacent holes, so as to split more fissures by utilizing the existing surrounding rock fissures, maximize the splitting ability of the splitting rods, and improve the construction efficiency of splitting rock mass.

[0020] The splitting rod installation fixture includes a tracked forklift, a splitting rod mounting slot mounted on the forks of the tracked forklift, a protective cover mounted on the splitting rod mounting slot, and a splitting rod boosting hydraulic cylinder mounted on the forks of the tracked forklift. The splitting rod mounting slot has a "U" shaped structure, with the top of the left and right sides extending outward horizontally and respectively overlapping and fixed to the left and right forks of the tracked forklift. The protective cover and the splitting rod mounting slot form a space for mounting the splitting rod. The splitting rod mounted in the splitting rod mounting slot can be pushed into the corresponding hole by the hydraulic rod of the splitting rod boosting hydraulic cylinder.

[0021] Currently, there is a lack of specialized tooling for installing splitting rods; installation can only be done through...

[0022] More preferably, in step S5, the inspection and acceptance process involves analyzing the construction time of each process, analyzing the reasons for abnormal time consumption of construction processes, proposing improvement measures, thereby improving construction efficiency indicators; inspecting the appearance of the excavation outline at the working face, analyzing the reasons in a timely manner, and correcting relevant construction parameters such as the spacing of peripheral holes and splitting holes, thereby improving technical and economic indicators.

[0023] The beneficial effects of this invention are:

[0024] (1) Compared with the current traditional hydraulic breaker and cantilever tunneling machine excavation method, this scheme introduces water-cooled drilling non-explosive excavation into the tunnel cyclic construction, forming an excavation method of drilling core with water-cooled drilling machine, splitting with rock splitter, and chiseling with hydraulic breaker in sequence. Compared with the traditional hydraulic breaker and cantilever tunneling machine excavation method, the construction speed is increased by 60.22%. At the same time, the vibration velocity monitoring equipment in the operating line shows that there is only vibration when the hydraulic breaker is chiseling, and the vibration velocity is about 0.15cm / s, which has no impact on the operating equipment of the operating line. The construction efficiency is high and the vibration generated by the overall process is small.

[0025] (2) The water-grinding drill is transported by a water-grinding drill lifting transport vehicle. After drilling and core taking along the outline of the tunnel face, holes are left that intersect with the outline of the steps on the tunnel face. Holes are left after uniform excavation along the middle of the tunnel face. The tunnel over-excavation loss rate is reduced by 50.43%, saving 1.1 cubic meters of shotcrete per linear meter and saving 450 yuan per linear meter. Moreover, drilling along the outline of the tunnel face and uniform drilling in the middle can effectively reduce the strength of the tunnel face, generate more cracks, and ensure the subsequent splitting and chiseling effect.

[0026] In summary, the present invention has the advantages of high construction efficiency, low vibration of the overall process, significantly improved excavation speed, reduced tunnel over-excavation loss rate, and cost savings. Attached Figure Description

[0027] Figure 1 This is a flowchart of the construction process of the present invention.

[0028] Figure 2 This is a schematic diagram of step S2 of the present invention.

[0029] Figure 3 for Figure 2 Side view.

[0030] Figure 4 This is a diagram showing the arrangement of the steps and holes on the working face.

[0031] Figure 5 This is a structural diagram of a lifting platform.

[0032] Figure 6 This is a schematic diagram of the inside of the drill barrel of a water-cooled drilling rig.

[0033] Figure 7 A schematic diagram of the fixture for installing the splitting rod.

[0034] Figure 8 for Figure 7 The side view of the protective shield is not shown.

[0035] Figure 9 A cross-sectional view of the splitting rod placed in the space formed by the protective cover and the splitting rod placement groove. Detailed Implementation

[0036] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0037] Combination Figure 1 — Figure 9 As shown, a rapid construction method for static excavation of hard rock tunnels is described, and the specific implementation steps are as follows:

[0038] Step S1: Lay out the design excavation outline of the tunnel face 1 according to the control guide wire inside the tunnel, and mark the center position of the core drilling.

[0039] Step S2: Use the water-grinding drill lifting transport vehicle b to transport the water-grinding drill a to the upper step of the working face 1, align it with the center position of the core sampling, and drill and sample the core one by one, thereby leaving holes 2 that intersect along the outline of the upper step of the working face 1 and holes 2 that are evenly distributed in the middle.

[0040] In step S2, the holes 2 on the outline of the face 1 intersect by 20mm to 22mm. The holes 2 in the middle of the face 1 are arranged in an oblique array, and the distance between the outermost hole 2 and the hole 2 on the outline of the face 1 is 68cm to 70cm. The spacing between adjacent holes 2 in the horizontal row is 1000mm to 1100mm, and the spacing between adjacent holes 2 in the vertical row is 500mm to 520mm.

[0041] In step S2, two water-grinding drill lifting transport vehicles b and the corresponding water-grinding drill a are symmetrically arranged on the left and right sides, respectively, to drill and core samples on the left and right sides of the working face 1. As the amount of drill cuttings accumulated in the boreholes exceeds the standard, one water-grinding drill lifting transport vehicle b withdraws, making room for a wheeled excavator to enter and remove the accumulated drill cuttings from the working face.

[0042] In step S2, the water drill lifting transport vehicle b consists of a transport vehicle b1 and a lifting platform b2 located on the top surface of the transport vehicle b1.

[0043] The transport vehicle b1 chassis is symmetrically equipped with four ground-supporting screw rods b11. The left and right lifting platforms b2 are connected by horizontal double-headed screw rods b6. The outer side of the lifting platform b2 is connected to the corresponding side wall by an outward and upward inclined double-headed screw rod b7.

[0044] The lifting platform b2 consists of a water-grinding drilling rig mounting platform b21 and retractable support legs b22 symmetrically arranged at the four corners of the bottom of the water-grinding drilling rig mounting platform b21.

[0045] The retractable support leg b22 consists of three square tubes b221 that are sequentially fitted inside and out, and two hydraulic cylinders b222 that drive the middle and upper square tubes b221 to rise and fall respectively.

[0046] Each square tube b221 is vertically spaced with a row of mounting holes, and the connection between adjacent square tube sections b221 is equipped with a pin that can pass through the corresponding mounting holes inside and outside for fixed connection. The lower square tube section b221 is fixed on the transport vehicle b1, and the top of the upper square tube section b221 is fixedly connected to the lifting platform b2.

[0047] The lower sections of the retractable support legs b22 are connected by a lower crossbeam b4 mounted on the transport vehicle b1.

[0048] The adjacent intermediate sections of the square tube b221 of the four retractable support legs b22 are connected by an upper crossbeam b3. The fixed end of the hydraulic cylinder b222 located below is installed on the transport vehicle b1, and the telescopic end is vertically connected to the top of the intermediate section square tube b221, thereby driving the lifting and lowering of the intermediate section square tube b221.

[0049] The fixed end of the hydraulic cylinder b222 located at the top is installed on the upper crossbeam b3, and the telescopic end is vertically upward and connected to the lifting platform b2. The height of the lifting platform b2 can be adjusted by adjusting the position of the middle section and / or the upper section square tube b221 corresponding to the hydraulic cylinder b222.

[0050] The top side of the water-grinding drilling rig mounting platform b21 is equipped with a wedge-shaped anti-slip device b211 that can lock the tires of the water-grinding drilling rig a, and the bottom side is equipped with an inclined support rod b5 between it and the transport vehicle b1.

[0051] The top of the inclined support rod b5 is hinged to the water-grinding drilling rig mounting platform b21, and the bottom is hinged to a slider b51.

[0052] The transport vehicle b1 is provided with a slide rail b12 for longitudinal movement of the slider, and the top of the slide rail b12 is provided with positioning holes at intervals.

[0053] The slider b51 is provided with mounting through holes that correspond to the positioning holes vertically, and is equipped with pins that pass through the mounting through holes and positioning holes for fixing.

[0054] The water-grinding drill a consists of a drill body a5, a drill barrel a2 for drilling core samples a1, a drive motor for rotating the drill barrel a2, drill teeth a3 located at the front end of the drill barrel a2, and a core impact hammer a4 placed inside the drill barrel a2 away from the drill teeth a3.

[0055] The core impact hammer a4 is aligned with the front end of the core sample a1, thereby causing the core sample a1 to break at the connection point with the parent rock by impact.

[0056] The rock core impact hammer a4 is preferably a hydraulic pneumatic hammer.

[0057] Step S3: Using the splitting rod installation tool c, place two splitting rods d into the adjacent holes 2 respectively, and then start splitting. Repeat the cycle of filling the adjacent holes 2 from top to bottom along the working face 1 until all holes 2 are split.

[0058] In step S3, the two splitting rods d are preferentially placed in holes 2 where there are surrounding rock fissures between adjacent holes 2.

[0059] The splitting rod installation fixture c consists of a tracked forklift c1, a splitting rod mounting slot c2 mounted on the forks of the tracked forklift c1, a protective cover c3 mounted on the splitting rod mounting slot c2, and a splitting rod boosting hydraulic cylinder c4 mounted on the forks of the tracked forklift c1.

[0060] The splitting bar mounting slot c2 has a "U" shaped structure, and the top of the left and right sides extends outward horizontally and overlaps and is fixed to the left and right forks of the tracked forklift c1 respectively.

[0061] The protective cover c3 and the splitting rod placement groove c2 form a space for placing the splitting rod d. The splitting rod d placed in the splitting rod placement groove c2 can be pushed into the corresponding hole 2 by the hydraulic rod of the splitting rod booster hydraulic cylinder c4.

[0062] Step S4: Use a hydraulic breaker to chisel away the face 1 from top to bottom along the outline of the face 1. Then, correct the core-taking corner of the water-powered drilling rig a at the design outline until the excavation outline meets the design requirements.

[0063] Step S5: Construct the lower step of the working face 1 according to steps S2-S4, and inspect and accept it after each cycle of excavation.

[0064] In step S5, the inspection and acceptance process involves analyzing the construction time of each process, analyzing the reasons for abnormal time consumption of construction processes, proposing improvement measures, and thus improving construction efficiency indicators; inspecting the appearance of the excavation outline at the working face, analyzing the reasons in a timely manner, and correcting relevant construction parameters such as the spacing of peripheral holes and splitting holes, thereby improving technical and economic indicators.

Claims

1. A rapid construction method for static excavation of tunnels in hard rock, characterized in that, Includes the following steps: Step S1: Lay out the excavation outline of the tunnel face (1) according to the control guide line inside the tunnel, and mark the center position of the core drilling. Step S2: Use a water-grinding drill lifting transport vehicle (b) to transport the water-grinding drill (a) to the upper step of the working face (1) and drill and core one by one, thereby leaving holes (2) that intersect along the outline of the upper step of the working face (1) and holes (2) that are evenly distributed in the middle. In step S2, two water-grinding drill lifting transport vehicles (b) and the corresponding water-grinding drill machine (a) are symmetrically arranged on the left and right sides, and drill cores on the left and right sides of the working face (1) simultaneously. As the amount of drill cuttings accumulated in the holes exceeds the standard, one water-grinding drill lifting transport vehicle (b) withdraws, making room for a wheeled excavator to enter and remove and transport the accumulated drill cuttings on the working face. Step S3: Using the splitting rod installation tool (c), place two splitting rods (d) into adjacent holes (2) respectively, and then start splitting. Repeat the cycle of filling adjacent holes (2) from top to bottom along the working face (1) to split until all holes (2) are split. Step S4: Use a hydraulic breaker to chisel away the face (1) from top to bottom along the outline of the face (1), and then correct the core-taking corner of the water-powered drilling rig (a) at the design outline until the excavation outline meets the design requirements. Step S5: Carry out the construction of the lower step of the working face (1) according to steps S2-S4. After each cycle of excavation is completed, check and accept the work.

2. The method for rapid static excavation of hard rock tunnels according to claim 1, characterized in that: In step S2, the holes (2) on the outline of the face (1) intersect by 20mm to 22mm. The holes (2) in the middle of the face (1) are arranged in an oblique array. The distance between the outermost hole (2) and the hole (2) on the outline of the face (1) is 68cm to 70cm. The spacing between adjacent holes (2) in the horizontal row is 1000mm to 1100mm, and the spacing between adjacent holes (2) in the vertical row is 500mm to 520mm.

3. The method for rapid static excavation of hard rock tunnels according to claim 1, characterized in that: In step S2, the water-grinding drill lifting transport vehicle (b) includes a transport vehicle (b1) and a lifting platform (b2) located on the top surface of the transport vehicle (b1). The base frame of the transport vehicle (b1) is symmetrically equipped with four ground-supporting screw rods (b11). The left and right lifting platforms (b2) are connected by horizontal double-ended screw rods (b6). The outer side of the lifting platform (b2) is connected to the corresponding side wall by an outward and upward inclined double-ended screw rod (b7). The lifting platform (b2) includes a water-grinding drill mounting platform (b21) and four symmetrically located corners at the bottom of the water-grinding drill mounting platform (b21). The retractable support leg (b22) includes three square tubes (b221) that are sequentially fitted inside and outside, and two hydraulic cylinders (b222) that drive the middle section and the upper section of the square tube (b221) to rise and fall respectively. Each square tube (b221) is provided with a row of mounting holes at vertical intervals, and the connection between adjacent sections of the square tube (b221) is equipped with a pin that can pass through the corresponding mounting holes inside and outside for fixed connection. The lower section of the square tube (b221) is fixed on the transport vehicle (b1), and the top of the upper section of the square tube (b221) is fixedly connected to the lifting platform (b2).

4. The method for rapid static excavation of hard rock tunnels according to claim 3, characterized in that: The lower sections (b221) of the adjacent retractable support legs (b22) are connected by a lower crossbeam (b4) mounted on the transport vehicle (b1). The adjacent middle sections (b221) of the four retractable support legs (b22) are connected by an upper crossbeam (b3). The fixed end of the lower hydraulic cylinder (b222) is mounted on the transport vehicle (b1), and the telescopic end is vertically upward and connected to the top of the middle section (b221), thereby driving the lifting of the middle section (b221). The fixed end of the upper hydraulic cylinder (b222) is mounted on the upper crossbeam (b3), and the telescopic end is vertically upward and connected to the lifting platform (b2). The height of the lifting platform (b2) can be adjusted by correspondingly adjusting the position of the middle section and / or the upper section (b221) through the hydraulic cylinder (b222).

5. The method for rapid static excavation of hard rock tunnels according to claim 3, characterized in that: The top side of the water-grinding drill platform (b21) is equipped with a wedge-shaped anti-slip device (b211) that can lock the tires of the water-grinding drill (a). The bottom side is provided with an inclined support rod (b5) between it and the transport vehicle (b1). The top of the inclined support rod (b5) is hinged to the water-grinding drill platform (b21), and the bottom is hinged to a slider (b51). The transport vehicle (b1) is provided with a slide rail (b12) for longitudinal movement of the slider. The top of the slide rail (b12) is provided with positioning holes spaced at intervals. The slider (b51) is provided with mounting holes that correspond to the positioning holes, and is equipped with a pin that passes through the mounting holes and positioning holes for fixing.

6. The method for rapid static excavation of hard rock tunnels according to claim 3, characterized in that: The water-powered drilling rig (a) includes a main body (a5), a drill barrel (a2) for drilling core samples (a1), a drive motor for rotating the drill barrel (a2), drill teeth (a3) ​​located at the front end of the drill barrel (a2), and a core impact hammer (a4) placed inside the drill barrel (a2) away from the drill teeth (a3). The core impact hammer (a4) is aligned with the front end of the core sample (a1), thereby enabling it to break the connection between the core sample (a1) and the parent rock by impacting the core sample (a1).

7. The method for rapid static excavation of hard rock tunnels according to claim 6, characterized in that: The rock core impact hammer (a4) is a hydraulic pneumatic hammer.

8. The method for rapid static excavation of hard rock tunnels according to claim 1, characterized in that: In step S3, the two splitting rods (d) are preferentially placed in holes (2) where there are surrounding rock fissures between adjacent holes (2). The splitting rod installation fixture (c) includes a tracked forklift (c1), a splitting rod placement groove (c2) installed on the forks of the tracked forklift (c1), a protective cover (c3) installed on the splitting rod placement groove (c2), and a splitting rod boosting hydraulic cylinder (c4) installed on the forks of the tracked forklift (c1). The splitting rod placement groove (c2) has a "U" shaped structure, and the top of the left and right sides extends outward horizontally and is respectively connected and fixed on the left and right forks of the tracked forklift (c1). The protective cover (c3) and the splitting rod placement groove (c2) form a space for placing the splitting rods (d). The splitting rods (d) placed in the splitting rod placement groove (c2) can be pushed into the corresponding holes (2) by the hydraulic rod of the splitting rod boosting hydraulic cylinder (c4).

9. The method for rapid static excavation of hard rock tunnels according to claim 1, characterized in that: In step S5, the inspection and acceptance process involves analyzing the construction time of each process, analyzing the reasons for abnormal construction process time consumption, and proposing improvement measures; inspecting the appearance of the excavation face outline, analyzing the reasons in a timely manner, and correcting the relevant construction parameters for the spacing of surrounding holes and splitting holes.

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