Water conservancy project tunnel and pipe jacking ultra-deep vertical shaft and construction method

Abstract

The invention discloses an ultra-deep vertical shaft of a hydraulic engineering tunnel and a jacking pipe and a construction method, and belongs to the technical field of hydraulic engineering. Comprising occluded waterproof support piles which are supported on the periphery of a shaft wall, and the lower ends of the occluded waterproof support piles extend below the bottom of the shaft and are embedded into bottom rocks; the bottom plate is supported at the bottom of the vertical shaft, a plurality of anti-floating anchor rods are arranged in the bottom plate, and the lower ends of the anti-floating anchor rods of the bottom plate are vertically anchored into bottom rock at the bottom of the vertical shaft; the bottom beam support is poured on the periphery of the top of the bottom plate and tightly attached to the inner side wall of the occlusion waterproof support pile, a plurality of support anti-floating anchor rods which are inclined downwards are anchored into the bottom beam support, and the lower ends of the support anti-floating anchor rods are anchored into rock; and the waterproof curtains are arranged on the peripheries of the occluded waterproof support piles. The occluded waterproof support piles, the waterproof curtain, the bottom plate and the bottom beam support form a stable anti-floating structure system, so that the anti-floating capability and the support waterproof capability of the ultra-deep vertical shaft are improved; the problems that a large excavator cannot go down to the shaft for excavation and a small excavator cannot move due to the narrow space of the ultra-deep vertical shaft are solved.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to an ultra-deep vertical shaft and a construction method for a water conservancy engineering tunnel and a jacking pipe. Background Art

[0002] In karst areas with complex geological conditions and well-developed karst caves and cavities, vertical shafts for water conservancy engineering tunnels and pipe jacking are built in hard rock formations. The shafts are important buildings for vertical lifting and transportation of construction machinery and equipment, engineering materials, and slag. They are vertical transportation channels for the entire construction process, and are also operation and maintenance channels after the project is completed. However, the constructed water conservancy engineering tunnels and pipe jacking shafts are often ultra-deep shafts, which face the following challenges:

[0003] (1) The ultra-deep shafts of water conservancy project tunnels and jacking pipes are small in hard rock formations. Large excavators cannot swing their arms or turn around to perform excavation operations. Small excavators cannot dig and their efficiency is too low. Blasting and excavation affect the safety of houses and buildings of surrounding residents.

[0004] (2) The ultra-deep shafts of water conservancy engineering tunnels and pipe jacking are often constructed and operated below the groundwater level. Therefore, anti-floating and waterproofing of ultra-deep shafts is another major problem.

[0005] Therefore, an ultra-deep shaft and construction method for a water conservancy engineering tunnel and jacking pipe are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an ultra-deep shaft and construction method for a water conservancy engineering tunnel and a jacking pipe, aiming to solve or improve the above-mentioned technical problems.

[0007] To achieve the above object, the present invention provides the following solution: The present invention provides an ultra-deep vertical shaft for a water conservancy engineering tunnel and a jacking pipe, comprising:

[0008] Interlocking waterproof support piles are supported around the shaft wall, and the lower ends of the interlocking waterproof support piles extend below the bottom of the shaft and are embedded in the bottom rock;

[0009] A bottom plate is supported at the bottom of the shaft, wherein a plurality of bottom plate anti-floating anchor rods are arranged in the bottom plate, and the lower ends of the bottom plate anti-floating anchor rods are vertically anchored into the bottom rock of the bottom of the shaft;

[0010] The bottom beam support is cast around the top of the bottom plate and is close to the inner wall of the interlocking waterproof support pile. A plurality of support anti-floating anchor rods inclined downward are anchored on the bottom beam support, and the lower ends of the support anti-floating anchor rods are anchored in the rock;

[0011] The water-blocking curtain is arranged on the outer periphery of the interlocking waterproof supporting piles.

[0012] Optionally, the interlocking waterproof support piles include a plurality of plain concrete piles and reinforced concrete piles arranged in a staggered interlocking manner; the lower ends of the plain concrete piles and the reinforced concrete piles extend below the bottom of the shaft and are embedded in the bottom rock; a tunnel and a jacking pipe are excavated on one side of the shaft, and a plurality of the plain concrete piles and the plurality of the reinforced concrete piles corresponding to the openings of the tunnel and the jacking pipe are cut off to form a tunnel opening.

[0013] Optionally, the bottom beam support is close to the inner walls of the plurality of the plain concrete piles and the plurality of the reinforced concrete piles, and the longitudinal steel bars in the reinforced concrete piles that are cut off and located below the tunnel and the top pipe opening are bent downward and anchored into the bottom beam support.

[0014] Optionally, a plurality of waist beams are provided, which are arranged in the shaft from top to bottom, and are laterally connected to the plurality of plain concrete piles and the plurality of reinforced concrete piles. A plurality of embedded steel bars are anchored in the waist beams, and the embedded steel bars horizontally penetrate the plain concrete piles and are anchored in the rock of the shaft wall.

[0015] Optionally, the waist beam is a reinforced concrete structure, the steel structure in the waist beam is composed of a plurality of longitudinal bars and a plurality of transverse connecting bars, and the transverse connecting steel bars in the waist beam are welded or sleeve-connected to the embedded transverse steel bars in the reinforced concrete piles.

[0016] Optionally, the support anti-floating anchor rod passes through the plain concrete pile; the bottom beam support is a reinforced concrete structure, the steel bars in the bottom beam support are composed of a plurality of longitudinal bars and a plurality of transverse connecting bars, and the transverse connecting steel bars in the bottom beam support are welded or sleeve-connected to the embedded transverse steel bars in the reinforced concrete pile.

[0017] Optionally, the water-blocking curtain includes a plurality of peripheral curtain grouting holes arranged on the periphery of the shaft wall, cement slurry is filled in the peripheral curtain grouting holes, and the plurality of peripheral curtain grouting holes form a closed curtain grouting arranged around the shaft, and the bottom of the peripheral curtain grouting holes extends below the bottom of the shaft.

[0018] Optionally, a plurality of bottom plate curtain grouting holes are provided at the bottom of the shaft, cement slurry is filled into the bottom plate curtain grouting holes, and the bottom plate curtain grouting holes penetrate the bottom plate.

[0019] A construction method for an ultra-deep vertical shaft of a water conservancy engineering tunnel and a jacking pipe is also provided, comprising:

[0020] Construction of interlocking waterproof support piles: according to the preset pile holes on the shaft wall, first drill a number of plain concrete pile holes, and pour concrete in the plain concrete pile holes; then drill a number of reinforced concrete pile holes, the reinforced concrete pile holes are located between two adjacent plain concrete pile holes and interlock with the plain concrete pile holes, hoist the steel cage down into the reinforced concrete pile holes, and pour concrete in the reinforced concrete pile holes, thereby forming interlocking waterproof support piles;

[0021] Shaft excavation: excavate the rocks inside the interlocking waterproof support piles to form a shaft; when excavating, first use a rotary drilling rig, the body of which is located outside the interlocking waterproof support piles on the ground, and the boom and rotary drilling structure extend into the interlocking waterproof support piles. Use a Z-shaped, backward method to excavate several holes in turn and remove the slag, and then use a small excavator to excavate the remaining loose rocks in the shaft and remove the slag;

[0022] Install the base plate and bottom beam supports;

[0023] Water-blocking curtain construction.

[0024] The present invention discloses the following technical effects:

[0025] (1) The interlocking waterproof support piles have high rigidity, high bearing capacity and strong anti-floating ability. The use of interlocking waterproof support piles avoids the safety issues of underground construction caused by water gushing caused by the reverse reinforced concrete wall support.

[0026] (2) The interlocking waterproof support piles, bottom plate and bottom beam support form a stable connection, which together constitute the waterproof structure of the shaft, which can effectively prevent groundwater from entering the shaft. The waterproof effect is good during the construction and operation periods, and the waterproof effect of the ultra-deep shaft is improved.

[0027] (3) The bottom of the interlocking waterproof support pile extends below the bottom of the shaft and is embedded in the bottom rock. The anti-floating anchor rod of the bottom plate is vertically anchored into the bottom rock of the shaft. At the same time, the anti-floating anchor rod of the support in the bottom beam support is tilted downward and anchored into the rock. Thus, the interlocking waterproof support pile, water-blocking curtain, bottom plate and bottom beam support in the present application form a stable anti-floating structural system, thereby improving the anti-floating effect of the bottom plate of the ultra-deep shaft.

[0028] (4) When digging vertical shafts, a rotary drilling rig is used to dig the shafts in a Z-shaped and backward manner, which improves the efficiency of ultra-deep vertical shaft excavation and greatly saves construction time. It solves the problem that when digging vertical shafts in hard rock formations, the excavation area is small, large excavators cannot swing their arms or turn around to perform excavation operations, and small excavators cannot dig and have low efficiency. It also avoids the problem of blasting excavation affecting the safety of houses and buildings of surrounding residents. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 It is a front view of the present invention;

[0031] Figure 2 A top view of the present invention;

[0032] Figure 3 It is a schematic diagram of the connection of the waist beam in the present invention;

[0033] Figure 4 It is a connection schematic diagram of the bottom beam support in the present invention.

[0034] In the figure: 1. Plain concrete piles; 2. Reinforced concrete piles; 3. Vertical shaft; 4. Tunnel and jacking pipe; 5. Embedded reinforcement; 6. Bottom plate; 7. Bottom plate anti-floating anchor rods; 8. Bottom beam support; 9. Support anti-floating anchor rods; 10. Waist beam; 11. Outer curtain grouting holes: 12. Bottom plate curtain grouting holes. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1-Figure 4 The present invention provides an ultra-deep vertical shaft and construction method for a water conservancy engineering tunnel and a jacking pipe, comprising:

[0038] The interlocking waterproof support piles are supported around the shaft wall of the shaft 3, and the lower ends of the interlocking waterproof support piles extend below the bottom of the shaft 3 and are embedded in the bottom rock;

[0039] A bottom plate 6 is supported at the bottom of the shaft 3. A plurality of bottom plate anti-floating anchor rods 7 are arranged in the bottom plate 6. The lower ends of the bottom plate anti-floating anchor rods 7 are vertically anchored into the bottom rock of the bottom of the shaft by no less than 3 m.

[0040] The bottom beam support 8 is cast around the top of the bottom plate 6 and is closely attached to the inner wall of the waterproof support pile. A plurality of support anti-floating anchor rods 9 arranged obliquely downward are anchored on the bottom beam support 8, and the lower ends of the support anti-floating anchor rods 9 are anchored in the rock;

[0041] The water-blocking curtain is arranged on the outer periphery of the interlocking waterproof supporting piles.

[0042] The interlocking waterproof support piles of the present application have great rigidity and high bearing capacity; the interlocking waterproof support piles, the base plate 6 and the bottom beam support 8 form a stable connection structure, thereby improving the structural stability.

[0043] The lower end of the interlocking waterproof support pile in the present application extends below the bottom of the shaft 3 and is embedded in the bottom rock, and the anti-floating anchor rod 7 of the bottom plate 6 is vertically anchored into the bottom rock of the shaft; at the same time, the support anti-floating anchor rod 9 in the bottom beam support 8 is tilted downward and anchored into the rock; thereby, the interlocking waterproof support pile, the bottom plate 6 and the bottom beam support 8 in the present application form a stable anti-floating structural system, thereby improving the anti-floating effect of the bottom plate of the deep shaft.

[0044] In some optional embodiments, the interlocking waterproof support piles include a plurality of plain concrete piles 1 and reinforced concrete piles 2 arranged in an interlaced manner; the lower ends of the plain concrete piles 1 and reinforced concrete piles 2 extend below the bottom of the shaft 3 and are embedded in the bottom rock; a tunnel and a jacking pipe 4 are excavated on one side of the shaft 3, and a plurality of plain concrete piles 1 and a plurality of reinforced concrete piles 2 corresponding to the openings of the tunnel and the jacking pipe 4 are cut off to form a tunnel opening.

[0045] In some optional embodiments, the bottom beam support 8 is close to the inner walls of several plain concrete piles 1 and several reinforced concrete piles 2, and the longitudinal steel bars in the reinforced concrete piles 2 that are cut off and located below the tunnel and the top pipe 4 openings are bent downward and anchored into the bottom beam support 8.

[0046] The diameter of the plain concrete pile 1 and the reinforced concrete pile 2 is φ800mm~φ1500mm, which is determined according to the geological conditions, the depth of the shaft, and the anti-floating water level. The concrete strength of the interlocking waterproof support pile is C30~C40, and the anti-seepage grade is P8; the plain concrete pile 1 is constructed first, and then the reinforced concrete pile 2 is constructed as a lateral support and waterproof structure. The concrete strength and anti-seepage grade of the bottom plate 6 are the same as those of the interlocking waterproof support pile. It is arranged at the bottom, and the thickness of the bottom plate 6 is designed according to the anti-floating water level. The bottom plate anti-floating anchor rod 7 adopts hot-rolled ribbed steel bars. The upper section is anchored in the concrete bottom plate 6 to meet the anchoring length requirements, and the lower section is anchored in the rock. The diameter of the bottom plate anti-floating anchor rod 7 and the length of the anchor in the rock are determined according to calculations and pull-out tests. The shaft bottom plate 6 and the interlocking waterproof support piles together form the first waterproofing. It can effectively prevent groundwater from entering the shaft, and the waterproofing effect is good during the construction period and operation period, which improves the waterproofing effect of the ultra-deep shaft.

[0047] The bottom beam support 8 is arranged along the peripheral end of the bottom plate 6, at the portal of the tunnel and the top pipe 4. The support anti-floating anchor rod 9 is made of hot-rolled ribbed steel bars with a diameter of φ25mm, arranged at a 45-degree angle downward, the upper section is anchored into the concrete bottom plate 6 and the bottom beam support 8 to meet the anchoring length requirements, and the lower section is anchored into the rock with a length of 5m; the bottom beam support 8 and the support anti-floating anchor rod 9 play a reverse support support role to the bottom plate 6 upward, improving the anti-floating effect of the bottom plate 6.

[0048] During the construction of the interlocking waterproof support piles, after all the boreholes of the plain concrete piles 1 are excavated and concrete is poured, the boreholes of the reinforced concrete piles 2 are excavated. The boreholes of the reinforced concrete piles 2 have interlocking parts with the plain concrete piles 1, so it is necessary to drill out the interlocking parts of the plain concrete piles 1, and then lower the steel cage into the boreholes of the reinforced concrete piles 2 and pour concrete to form the reinforced concrete piles 2; the structural strength of the lateral support is increased by the reinforced concrete piles 2, and the effective connection of the two adjacent reinforced concrete piles 2 is achieved by the plain concrete piles 1.

[0049] In some optional embodiments, a plurality of waist beams 10 are further provided, and the plurality of waist beams 10 are arranged from top to bottom in the vertical shaft 3, and the waist beams 10 are transversely connected to a plurality of plain concrete piles 1 and a plurality of reinforced concrete piles 2, and a plurality of embedded steel bars 5 are anchored on the waist beams 10, and the embedded steel bars 5 horizontally penetrate the plain concrete piles 1 and are anchored in the rock of the shaft wall of the vertical shaft 3.

[0050] Among them, a crown beam is arranged on the inner top of the interlocking waterproof support pile, and the structure and connection of the crown beam are the same as those of the waist beam 10; the concrete strength of the waist beam 10 is the same as that of the interlocking waterproof support pile, and it is arranged inside the interlocking waterproof support pile, about 5m from top to bottom, and the waist beam 10 is a closed frame structure, so as to be connected with each plain concrete pile 1 and reinforced concrete pile 2 in the interlocking waterproof support pile; the crown beam and waist beam 10 play an internal support role, enhance the structural rigidity, and form a closed rectangular or circular interlocking support system with the interlocking waterproof support pile. The cross-sectional size and concrete strength of the bottom beam support 8 are the same as those of the waist beam 10.

[0051] The bottoms of the plain concrete piles 1 and reinforced concrete piles 2 in the present application extend below the bottom of the shaft 3 and are embedded in the bottom rock. The embedded steel bars 5 in the transverse connectors are horizontally anchored in the shaft wall rock of the shaft 3. The bottom plate anti-floating anchor rods 7 on the bottom plate 6 are vertically anchored in the bottom rock of the shaft bottom. At the same time, the support anti-floating anchor rods 9 in the bottom beam support 8 are anchored obliquely downward in the rock. Thus, the interlocking waterproof support piles, bottom plate 6 and bottom beam support 8 in the present application form a stable anti-floating structural system, thereby improving the anti-floating effect of the bottom plate of the deep shaft.

[0052] In some optional embodiments, the waist beam 10 is a reinforced concrete structure, and the steel structure in the waist beam 10 is composed of a plurality of longitudinal bars and a plurality of transverse connecting bars. The transverse connecting steel bars in the waist beam 10 are welded or sleeve-connected to the embedded transverse steel bars in the reinforced concrete pile 2.

[0053] In some optional embodiments, the support anti-floating anchor rod 9 penetrates the plain concrete pile 1; the bottom beam support 8 is a reinforced concrete structure, and the steel structure in the bottom beam support 8 is composed of a plurality of longitudinal bars and a plurality of transverse connecting bars. The transverse connecting steel bars in the bottom beam support 8 are welded or sleeved to the embedded transverse steel bars in the reinforced concrete pile 2.

[0054] In some optional embodiments, the water-blocking curtain includes a plurality of outer curtain grouting holes 11 arranged on the periphery of the shaft wall of the vertical shaft 3, cement slurry is poured into the outer curtain grouting holes 11, and the plurality of outer curtain grouting holes 11 form a closed curtain grouting line arranged around the vertical shaft 3, and the bottom of the outer curtain grouting holes 11 extends below the bottom of the vertical shaft 3.

[0055] In some optional embodiments, a plurality of bottom plate curtain grouting holes 12 are provided at the bottom of the shaft 3 , cement slurry is filled in the bottom plate curtain grouting holes 12 , and the bottom plate curtain grouting holes 12 penetrate the bottom plate 6 .

[0056] A plurality of outer curtain grouting holes 11 and a plurality of bottom plate curtain grouting holes 12 are arranged in the order of 1st hole, 2nd hole, 3rd hole, 1st hole, 2nd hole, 3rd hole respectively. When pouring cement slurry, 1st hole is poured first, then 2nd hole is poured, and finally 3rd hole is poured.

[0057] The diameter of the outer curtain grouting holes 11 and the bottom plate curtain grouting holes 12 is 56mm. The outer curtain grouting holes 11 are arranged along the outer edge of the interlocking waterproof support pile at a distance of 1m to form a closed curtain grouting line. The distance between two adjacent outer curtain grouting holes 11 is 2m, which are divided into 1st sequence hole, 2nd sequence hole, and 3rd sequence hole; the bottom plate curtain grouting holes 12 are arranged under the bottom plate 6, with a spacing of 3m in the vertical and horizontal directions, and are divided into 1st sequence hole, 2nd sequence hole, and 3rd sequence hole; the depth of the grouting hole is 5m below the bottom of the interlocking waterproof support pile, and the grouting pressure is determined by test. Curtain grouting serves as the second waterproofing to block the groundwater outside and at the bottom of the shaft.

[0058] First, the first hole is poured. Since there are cracks around the hole diameter, the poured cement slurry will extend to the surrounding areas and pour into the cracks, so that the cement slurry will flow into the second hole. Then, when pouring the second hole, the amount of cement slurry poured in the second hole can be reduced.

[0059] A construction method for an ultra-deep vertical shaft of a water conservancy engineering tunnel and a jacking pipe is also provided, comprising:

[0060] Construction of interlocking waterproof support piles: according to the preset pile holes on the shaft wall, first drill a number of plain concrete pile holes, and pour concrete in the plain concrete pile holes; then drill a number of reinforced concrete pile holes, the reinforced concrete pile holes are located between two adjacent plain concrete pile holes and interlock with the plain concrete pile holes, hoist the steel cage down into the reinforced concrete pile holes, and pour concrete in the reinforced concrete pile holes, thereby forming interlocking waterproof support piles;

[0061] Excavation of the vertical shaft 3: excavate the rocks inside the interlocking waterproof support piles to form the vertical shaft 3; when excavating, first use a rotary drilling rig, the body of which is located outside the interlocking waterproof support piles on the ground, the boom and the rotary drilling structure extend into the interlocking waterproof support piles, and excavate in a Z-shaped and backward manner, excavate several boreholes in turn and remove slag, and then use a small excavator to excavate the remaining loose rocks in the vertical shaft 3 and remove slag; the body of the small excavator enters the vertical shaft 3 for excavation;

[0062] Install the bottom plate 6 and the bottom beam support 8;

[0063] Water-blocking curtain construction.

[0064] Among them, when the rotary drilling rig is excavating, the following Figure 2 The Z-shaped, backward excavation method shown in the sequence of numbers 1, 2, 3, 4...n, and first using a rotary drilling rig for excavation and then using a small excavator for excavation, solves the problem of excavating a vertical shaft in a hard rock formation, where the excavation area is small, a large excavator cannot swing its arm or turn around for excavation operations, and a small excavator cannot dig far enough or has low efficiency. It also avoids the problem of blasting excavation affecting the safety of houses and buildings of surrounding residents; it improves the efficiency of excavation of ultra-deep vertical shafts and greatly saves construction time.

[0065] In some optional embodiments, the interlocking waterproof support piles are constructed.

[0066] The construction method of this application is:

[0067] 1) Drilling of plain concrete pile holes, underwater concrete pouring in the holes → Drilling of reinforced concrete pile holes, processing and hoisting of steel cages into the holes, underwater reinforced concrete pouring in the holes, forming the first waterproof support structure system of interlocking waterproof support piles;

[0068] 2) Construction of the crown beam on the top of the pile → The rotary drilling rig uses the Z-shaped and backward method to drill the surrounding rock inside the shaft in the order of serial numbers 1, 2, 3, 4...n, and removes the slag at the same time → The small excavator excavates the remaining surrounding rock in the shaft and removes the slag, and at the same time, the waist beam 10 is constructed from top to bottom, and the steel bars are connected and the rebars 5 are anchored;

[0069] 3) Bottom plate 6, bottom plate anti-floating anchor rod 7 drilling, grouting and anchoring construction → bottom beam support 8, support anti-floating anchor rod 9 construction → outer curtain grouting hole 11 and bottom plate curtain grouting hole 12 among the sequence 1 holes drilling, grouting construction → outer curtain grouting hole 11 and bottom plate curtain grouting hole 12 among the sequence 2 holes drilling, grouting construction → outer curtain grouting hole 11 and bottom plate curtain grouting hole 12 among the sequence 3 holes drilling, grouting construction, forming the second curtain waterproofing system → grouting inspection hole drilling, grouting, water pressure test, inspection → ultra-deep shaft construction completed.

[0070] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0071] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An ultra-deep vertical shaft for a hydraulic engineering tunnel and a jacking pipe, characterized in that: include: Interlocking waterproof support piles are supported around the shaft wall of the shaft (3), and the lower ends of the interlocking waterproof support piles extend below the bottom of the shaft (3) and are embedded in the bottom rock; A bottom plate (6) is supported at the bottom of the shaft (3), wherein a plurality of bottom plate anti-floating anchor rods (7) are arranged in the bottom plate (6), and the lower ends of the bottom plate anti-floating anchor rods (7) are vertically anchored into the bottom rock of the shaft bottom; A bottom beam support (8) is cast around the top of the bottom plate (6) and is closely attached to the inner wall of the interlocking waterproof support pile. A plurality of support anti-floating anchor rods (9) arranged obliquely downward are anchored on the bottom beam support (8), and the lower ends of the support anti-floating anchor rods (9) are anchored in the rock; The water-blocking curtain is arranged on the outer periphery of the interlocking waterproof supporting piles.

2. The ultra-deep vertical shaft for a water conservancy engineering tunnel and a jacking pipe according to claim 1, characterized in that: The interlocking waterproof support piles include a plurality of plain concrete piles (1) and reinforced concrete piles (2) arranged in a staggered interlocking manner; the lower ends of the plain concrete piles (1) and the reinforced concrete piles (2) extend below the bottom of the shaft (3) and are embedded in the bottom rock; a tunnel and a jacking pipe (4) are excavated on one side of the shaft (3), and a plurality of the plain concrete piles (1) and a plurality of the reinforced concrete piles (2) corresponding to the openings of the tunnel and the jacking pipe (4) are cut off to form a tunnel opening.

3. The ultra-deep vertical shaft for a hydraulic engineering tunnel and a jacking pipe according to claim 2, characterized in that: The bottom beam support (8) is closely attached to the inner side walls of the plurality of plain concrete piles (1) and the plurality of reinforced concrete piles (2), and the longitudinal steel bars in the reinforced concrete piles (2) that are cut off and located below the openings of the tunnel and the top pipe (4) are bent downward and anchored into the bottom beam support (8).

4. The ultra-deep vertical shaft for a hydraulic engineering tunnel and a jacking pipe according to claim 2, characterized in that: A plurality of waist beams (10) are also provided. The plurality of waist beams (10) are arranged from top to bottom in the vertical shaft (3). The waist beams (10) are transversely connected to the plurality of plain concrete piles (1) and the plurality of reinforced concrete piles (2). A plurality of embedded steel bars (5) are anchored on the waist beams (10). The embedded steel bars (5) horizontally penetrate the plain concrete piles (1) and are anchored in the rock of the shaft wall of the vertical shaft (3).

5. The ultra-deep vertical shaft for a water conservancy engineering tunnel and a jacking pipe according to claim 4, characterized in that: The waist beam (10) is a reinforced concrete structure. The steel bar structure in the waist beam (10) is composed of a plurality of longitudinal bars and a plurality of transverse connecting bars. The transverse connecting steel bars in the waist beam (10) are welded or sleeve-connected to the pre-buried transverse steel bars in the reinforced concrete pile (2).

6. The ultra-deep vertical shaft for a water conservancy engineering tunnel and a jacking pipe according to claim 2, characterized in that: The support anti-floating anchor rod (9) passes through the plain concrete pile (1); the bottom beam support (8) is a reinforced concrete structure, the steel bar structure in the bottom beam support (8) is composed of a plurality of longitudinal bars and a plurality of transverse connecting bars, and the transverse connecting steel bars in the bottom beam support (8) are welded or sleeve-connected to the pre-buried transverse steel bars in the reinforced concrete pile (2).

7. The ultra-deep vertical shaft for a water conservancy engineering tunnel and a jacking pipe according to claim 1, characterized in that: The water-blocking curtain comprises a plurality of peripheral curtain grouting holes (11) arranged on the periphery of the shaft (3) wall, wherein cement grout is filled in the peripheral curtain grouting holes (11), and the plurality of peripheral curtain grouting holes (11) form a closed curtain grouting arranged around the shaft (3), and the bottom of the peripheral curtain grouting holes (11) extends below the bottom of the shaft (3).

8. The ultra-deep vertical shaft for a water conservancy engineering tunnel and a jacking pipe according to claim 7, characterized in that: A plurality of bottom plate curtain grouting holes (12) are arranged at the bottom of the vertical shaft (3), cement grout is filled into the bottom plate curtain grouting holes (12), and the bottom plate curtain grouting holes (12) penetrate the bottom plate (6).

9. A construction method for an ultra-deep vertical shaft of a water conservancy project tunnel and a jacking pipe, according to any one of claims 1 to 8, characterized in that: include: Construction of interlocking waterproof support piles: according to the preset pile holes on the shaft wall, first drill a number of plain concrete pile holes, and pour concrete in the plain concrete pile holes; then drill a number of reinforced concrete pile holes, the reinforced concrete pile holes are located between two adjacent plain concrete pile holes and interlock with the plain concrete pile holes, hoist the steel cage down into the reinforced concrete pile holes, and pour concrete in the reinforced concrete pile holes, thereby forming interlocking waterproof support piles; Excavation of the vertical shaft (3): excavating the rocks inside the interlocking waterproof support piles to form the vertical shaft (3); during excavation, a rotary drilling rig is first used, the body of the rotary drilling rig is located outside the interlocking waterproof support piles on the ground, the boom and the rotary drilling structure are extended into the interlocking waterproof support piles, and excavation is carried out in a Z-shaped and backward manner, and a number of boreholes are excavated in sequence and slag is removed, and then a small excavator is used to excavate the remaining loose rocks in the vertical shaft (3) and slag is removed; Installing the bottom plate (6) and the bottom beam support (8); Water-blocking curtain construction.

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