A composite water conveyance pipe for water conservancy projects and its construction technology

Abstract

The present invention belongs to the technical field of water conservancy engineering, and particularly relates to a composite water conveyance pipe for water conservancy engineering and its construction technology. In the present invention, an inner connection strengthening structure is provided between the segments, which can effectively increase the connection strength between the segments and resist the bending moment on the inner side of the pipe wall; the first installation groove is connected to the first installation protrusion, and the second installation protrusion and the second installation groove are connected, which can effectively avoid problems such as misalignment deformation and segment floating during the installation and grouting of the segments, and can also prevent the deviation of the first waterproof structure / second waterproof structure, enhancing the waterproof effect; the construction of the present invention is convenient and has a short cycle; the first consolidation slurry is poured into the back of the wall of the water conveyance pipe through the first grouting hole to fix the water conveyance pipe, and then the second grouting hole is opened, and the second consolidation slurry is poured into the second grouting hole to fill the void at the top of the water conveyance pipe and simultaneously consolidate the surrounding rock of the water conveyance pipe, so that the surrounding rock and the water conveyance pipe are consolidated into a whole, further increasing the compressive and anti-seepage capabilities of the water conveyance pipe.

Description

Technical Field

[0001] The present invention belongs to the technical field of water conservancy projects, and particularly relates to a composite water conveyance pipe for water conservancy projects and its construction technology. Background Art

[0002] In the water conveyance tunnels of large and medium-sized water diversion, water supply, and drainage projects in water conservancy project construction, shield or TBM construction is adopted. In shield or TBM tunnels, water conveyance segments are installed. Commonly, reinforced concrete segments are used to form a water conveyance channel, or reinforced concrete segments plus cast-in-place concrete lining are used to form a water conveyance channel. However, there are some problems:

[0003] When reinforced concrete segments are spliced to form a water conveyance channel, the water conveyance channel is usually formed by butt-jointing the planes of multiple segments and then connected by bolts. Most of the water conveyance pipes are also butt-jointed in the plane and then connected by bolts. After connection, the water conveyance channel is prone to segment misalignment deformation and segment floating under the action of grouting pressure, affecting the structural stability of the water conveyance channel and also increasing water loss during water conveyance. For the method of forming a water conveyance channel by using reinforced concrete segments plus cast-in-place concrete lining, the cast-in-place reinforced concrete lining (inner lining) can only be constructed after the installation construction of the entire tunnel segments is completed, resulting in a large project investment and a long construction period.

[0004] Therefore, a composite water conveyance pipe for water conservancy projects and its construction technology are proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a composite water conveyance pipe for water conservancy projects and its construction technology to solve the above problems.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] A composite water conveyance pipe for water conservancy projects includes a plurality of sequentially connected water conveyance pipe segments. Each water conveyance pipe segment includes a plurality of segments. Adjacent two segments are fixedly connected. A strengthening component is arranged inside the segment. A first grouting hole is opened on the segment. A first installation protrusion and a first installation groove are respectively arranged on two opposite sides of the segment. Both the first installation protrusion and the first installation groove are arranged along the axial direction of the segment. The first installation protrusions and the first installation grooves of adjacent two segments are adapted to each other. A first waterproof structure is arranged between the matching first installation protrusion and the first installation groove. Adjacent two segments of the same water conveyance pipe segment are fixedly connected through a first connection structure. An inner connection strengthening structure is arranged between adjacent two segments of the same water conveyance pipe segment;

[0008] Both ends of the segment are respectively provided with a second installation projection and a second installation groove. The second installation projection and the second installation groove are both arranged along the arc direction of the segment. The second installation projections and the second installation grooves of two adjacent segments in two adjacent water delivery pipe sections are adapted to each other. A second waterproof structure is arranged between the matched second installation projection and the second installation groove. Two adjacent segments in two adjacent water delivery pipe sections are fixedly connected through a second connection structure. An inner connection strengthening structure is arranged between two adjacent segments in two adjacent water delivery pipe sections.

[0009] In the composite water delivery pipe for water conservancy projects of the present invention, the first connection structure includes a plurality of first bolt holes which are respectively opened on opposite sides of the segment. The plurality of first bolt holes on one side of the segment are arranged at equal intervals. One end of the plurality of first bolt holes located on the concave surface of the segment communicates with a first plugging groove which is opened on the concave surface of the segment. The plurality of first bolt holes of two adjacent segments are arranged in one-to-one correspondence. A first bolt is inserted into the corresponding two first bolt holes. The end of the first bolt extends into the first plugging groove and is threadedly connected with a first nut. A first gasket is arranged between the first nut and the bottom wall of the first plugging groove. The first gasket is sleeved on the outer side of the first bolt.

[0010] In the composite water delivery pipe for water conservancy projects of the present invention, the inner connection strengthening structure includes a lining layer which is attached to the concave surface of the segment. A plurality of stud bolts are fixedly connected to the convex surface of the lining layer. The plurality of stud bolts are arranged in an array. The stud bolts are perpendicular to the convex surface of the lining layer. The stud bolts are embedded in the segment.

[0011] A groove is circumferentially opened at the outer edge of the lining layer near the concave surface of the lining layer. The adjacent grooves of two adjacent lining layers are arranged in correspondence. Two adjacent lining layers are fixedly connected by welding at the groove.

[0012] In the composite water delivery pipe for water conservancy projects of the present invention, the inner connection strengthening structure includes a plurality of welding ribs which are embedded in the segment. In the same water delivery pipe section, a plurality of the welding ribs are respectively arranged on opposite sides of the segment. The plurality of welding ribs on the same side are arranged at equal intervals along the length direction of the segment. A plurality of the welding ribs are arranged at both ends of the water delivery pipe section. The plurality of welding ribs at the end of the water delivery pipe section are arranged at equal intervals along the radian direction of the segment. An empty groove is circumferentially opened at the outer edge of the concave surface of the segment. One end of the welding rib extends into the empty groove. The adjacent welding ribs of two adjacent segments are arranged in an overlapping manner. The overlapping two welding ribs are fixedly connected by welding.

[0013] In the composite water conveyance pipe for water conservancy projects of the present invention, the strengthening assembly includes a plurality of strengthening transverse ribs and a plurality of strengthening longitudinal ribs. The strengthening transverse ribs and the strengthening longitudinal ribs are both embedded in the segment. The strengthening longitudinal ribs are arranged along the length direction of the segment, and the plurality of strengthening longitudinal ribs are arranged at equal intervals along the circumferential direction of the segment. The strengthening transverse ribs are arranged along the circumferential direction of the segment, and the plurality of strengthening transverse ribs are arranged at equal intervals along the length direction of the segment.

[0014] In the composite water conveyance pipe for water conservancy projects of the present invention, the first waterproof structure includes a first water stop strip. The first water stop strip is arranged at the bottom of the first installation groove, and the first water stop strip abuts against the first installation projection.

[0015] In the composite water conveyance pipe for water conservancy projects of the present invention, the second connection structure includes a plurality of second bolt holes. The plurality of second bolt holes are respectively opened at both ends of the segment. The plurality of second bolt holes located at one end of the segment are arranged at equal intervals. One end of the second bolt hole located on the concave surface of the segment communicates with a second plugging groove. The second plugging groove is opened on the concave surface of the segment. The plurality of second bolt holes of two adjacent segments are arranged in one-to-one correspondence. A second bolt is inserted into the corresponding two second bolt holes. The end of the second bolt penetrates into the second plugging groove and is threadedly connected with a second nut. A second gasket is arranged between the second nut and the bottom wall of the second plugging groove. The second gasket is sleeved on the outside of the second bolt.

[0016] In the composite water conveyance pipe for water conservancy projects of the present invention, the second waterproof structure includes a second water stop strip arranged circumferentially at the bottom of the plurality of second installation grooves. The second water stop strip abuts against the second installation projection.

[0017] In the composite water conveyance pipe for water conservancy projects of the present invention, a first elastic pad is arranged between two adjacent segments within the same water conveyance pipe section, and a second elastic pad is arranged between two adjacent segments of two adjacent water conveyance pipe sections.

[0018] A construction process for a composite water conveyance pipe for water conservancy projects, which is used for the composite water conveyance pipe for water conservancy projects described above, comprises the following steps:

[0019] Transport the prefabricated segments to the excavated tunnel, assemble the segments circumferentially into a water conveyance pipe section and fix them, sequentially connect and fix the water conveyance pipe sections along the length direction of the tunnel. Through the first grouting holes of the segments in the water conveyance pipe, pour the first consolidation grout behind the wall of the water conveyance pipe to form a stable layer, fix the water conveyance pipe. Drill holes in the surrounding rock of the water conveyance pipe at the first grouting holes to obtain second grouting holes, pour the second consolidation grout into the second grouting holes to fill the voids at the top of the water conveyance pipe, and at the same time consolidate the surrounding rock of the water conveyance pipe to form a consolidation layer. Repeat multiple times until the construction is completed.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] When splicing the water conveyance pipes of the present invention, first transport the prefabricated segments to the excavated tunnel, surround the segments circumferentially to form the water conveyance pipe, then fix multiple segments through the first connection structure, and an inner connection strengthening structure is arranged between the segments, which can effectively increase the connection strength between the segments and resist the bending moment on the inner side of the pipe wall; the adjacent two segments of the same water conveyance pipe are connected through the first installation groove and the first installation projection, and the adjacent two water conveyance pipes are connected through the second installation projection and the second installation groove, which can effectively avoid problems such as misalignment deformation and segment floating during the back grouting of the segment wall. The first waterproof structure is arranged in the first installation groove, and the second waterproof structure is arranged in the second installation groove, avoiding the offset of the first waterproof structure / second waterproof structure, which can enhance the waterproof effect, and the construction is convenient, and it can be carried out synchronously with the excavation of the tunnel, and the construction period is short; after the connection of the water conveyance pipes is completed, pour the first consolidation slurry into the back of the water conveyance pipe wall through the first grouting hole to fix the water conveyance pipe, then open the second grouting hole, pour the second consolidation slurry into the second grouting hole to fill the void at the top of the water conveyance pipe, and at the same time consolidate and grout the surrounding rock of the water conveyance pipe, so that the surrounding rock and the water conveyance pipe are consolidated into a whole, further increasing the compressive and anti-seepage capabilities of the water conveyance pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings:

[0023] Figure 1 It is a cross-sectional view of the water conveyance pipe in the present invention;

[0024] Figure 2 It is a longitudinal sectional view of the water conveyance pipe in the present invention;

[0025] Figure 3 It is one of the circumferential connection schematic diagrams of two adjacent segments of the same water conveyance pipe segment in the present invention;

[0026] Figure 4 It is Figure 3 The partial enlarged view at A in;

[0027] Figure 5 It is one of the longitudinal connection schematic diagrams of adjacent segments of two adjacent water conveyance pipe segments in the present invention;

[0028] Figure 6 It is another circumferential connection schematic diagram of two adjacent segments of the same water conveyance pipe segment in the present invention;

[0029] Figure 7 Another longitudinal connection schematic diagram of adjacent segments of adjacent water conveyance pipe segments in the present invention;

[0030] Wherein, 1, segment; 2, stabilizing layer; 3, consolidation layer; 4, second grouting hole; 5, first grouting hole; 101, reinforcing transverse rib; 102, reinforcing longitudinal rib; 103, inner lining layer; 104, anti-corrosion layer; 105, first bolt hole; 106, first bolt; 107, first nut; 108, first gasket; 109, first plugging material; 110, first water stop strip; 111, first elastic pad; 113, stud; 114, second bolt hole; 115, second water stop strip; 116, second elastic pad; 117, second bolt; 118, second plugging material; 119, second gasket; 120, second nut; 121, welding rib; 122, empty groove. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0032] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Referring to Figures 1 to 7 , the present invention discloses a composite water conveyance pipe for water conservancy projects, which includes a plurality of sequentially connected water conveyance pipe segments. The water conveyance pipe segments include a plurality of segments 1, and adjacent segments 1 are fixedly connected. A reinforcing component is arranged inside the segment 1. A first grouting hole 5 is opened on the segment 1. A first installation protrusion and a first installation groove are respectively arranged on opposite sides of the segment 1. Both the first installation protrusion and the first installation groove are arranged along the axial direction of the segment 1. The first installation protrusions and the first installation grooves of adjacent segments 1 are adapted to each other. A first waterproof structure is arranged between the cooperating first installation protrusion and the first installation groove. Adjacent segments 1 of the same water conveyance pipe segment are fixedly connected through a first connection structure. An inner connection strengthening structure is arranged between adjacent segments 1 of the same water conveyance pipe segment;

[0034] Both ends of the segment 1 are respectively provided with a second installation projection and a second installation groove. The second installation projection and the second installation groove are both arranged along the arc direction of the segment 1. The second installation projections and the second installation grooves of two adjacent segments 1 in adjacent water conveyance pipe sections are adapted to each other. A second waterproof structure is arranged between the mating second installation projection and second installation groove. Two adjacent segments 1 in adjacent water conveyance pipe sections are fixedly connected through a second connection structure. An inner connection strengthening structure is arranged between two adjacent segments 1 in adjacent water conveyance pipe sections.

[0035] During the construction and installation of the water conveyance pipe of the present invention, first, the prefabricated segment 1 is transported to the excavated tunnel, and the segment 1 is circumferentially enclosed to form a water conveyance pipe section. Then, a plurality of segments 1 are fixed through a first connection structure. The plurality of water conveyance pipe sections are connected through the mating second installation projections and second installation grooves, and then fixedly connected through a second connection structure. An inner connection strengthening structure is arranged between adjacent segments 1, which can effectively enhance the tensile strength between the segments 1 and resist the bending moments on the outer side and the inner side of the pipe wall. Two adjacent segments 1 in the same water conveyance pipe section are connected through a first installation groove and a first installation projection. Two adjacent water conveyance pipe sections are connected through a second installation projection and a second installation groove, which can effectively avoid problems such as misalignment deformation and floating of the segment 1. A first waterproof structure is arranged in the first installation groove, and a second waterproof structure is arranged in the second installation groove to prevent the first waterproof structure / second waterproof structure from shifting, enhance the waterproof effect, and the construction is convenient and can be carried out synchronously with the excavation of the tunnel, with a short working cycle. After the connection of the water conveyance pipe is completed, first consolidated slurry is poured into the back of the wall of the water conveyance pipe through the first grouting hole 5 to fix the water conveyance pipe. Then, a second grouting hole 4 is opened, and second consolidated slurry is poured into the second grouting hole 4 to fill the void at the top of the water conveyance pipe and simultaneously consolidate the surrounding rock of the water conveyance pipe, so that the surrounding rock and the water conveyance pipe are consolidated into a whole and jointly bear the load, further increasing the compressive capacity and anti-seepage capacity of the water conveyance pipe.

[0036] Among them, the first consolidated slurry is fine aggregate concrete or cement mortar with a strength of C30 or M30; the second consolidated slurry is cement slurry with a water-cement ratio of 1:1, 0.8:1, or 0.5:1.

[0037] In a feasible solution, the first connection structure includes a plurality of first bolt holes 105, and the plurality of first bolt holes 105 are respectively opened on the opposite sides of the segment 1. The plurality of first bolt holes 105 on one side of the segment 1 are arranged at equal intervals. One end of the first bolt hole 105 located on the concave surface of the segment 1 communicates with a first plugging groove, and the first plugging groove is opened on the concave surface of the segment 1. The plurality of first bolt holes 105 of adjacent segments 1 are arranged in one-to-one correspondence. A first bolt 106 is inserted into the corresponding two first bolt holes 105. The end of the first bolt 106 extends into the first plugging groove and is threadedly connected with a first nut 107. A first gasket 108 is arranged between the first nut 107 and the bottom wall of the first plugging groove, and the first gasket 108 is sleeved on the outside of the first bolt 106. A first small hole is opened on the first gasket 108, and the first small hole communicates with the first bolt hole 105. After the first bolt 106 is inserted into the first bolt hole 105 and fixed by the first nut 107, cement slurry is poured into the first bolt hole 105 through the first small hole to consolidate the first bolt hole 105 and prevent the first bolt 106 from rusting at the same time.

[0038] The first bolt 106 is set to be arc-shaped with the convex surface facing the outside of the water delivery pipe. By connecting two adjacent segments 1 with the first bolt 106, the structural strength of the adjacent segments 1 can be effectively increased, the tensile and compressive capacities of the water delivery pipe can be increased, and the bending moment on the outer side of the pipe wall can be resisted.

[0039] The first plugging groove is filled with a first plugging material 109, and the material of the first plugging material 109 is epoxy mortar, which plays a sealing role to prevent the first bolt 106 from rusting.

[0040] In a feasible solution, the inner connection strengthening structure includes a lining layer 103, and the lining layer 103 is attached to the concave surface of the segment 1. A plurality of stud bolts 113 are fixedly connected to the convex surface of the lining layer 103. The plurality of stud bolts 113 are arranged in an array, and the stud bolts 113 are perpendicular to the convex surface of the lining layer 103. The stud bolts 113 are anchored in the segment 1.

[0041] The stud bolts 113 are used to enhance the shear connection strength between the lining layer 103 and the segment 1, and at the same time enhance the anti-slip ability between the segment 1 and the lining layer 103.

[0042] A groove is circumferentially opened at the outer edge of the lining layer 103, and the groove is close to the concave surface of the lining layer 103. The adjacent grooves of two adjacent lining layers 103 are arranged in correspondence to form a V-shaped opening, and two adjacent lining layers 103 are fixedly welded at the groove in a V-shape.

[0043] The lining layer 103 is an arc-shaped steel plate.

[0044] An anti-corrosion layer 104 is coated on the concave surface of the lining layer 103 to prevent the lining layer 103 from being corroded.

[0045] In another feasible solution, the inner connection strengthening structure includes multiple welding ribs 121. The welding ribs 121 are embedded in the segment 1. In the same water conveyance pipe section, multiple welding ribs 121 are respectively arranged on the opposite sides of the segment 1. The multiple welding ribs 121 on the same side are arranged at equal intervals along the length direction of the segment 1. Multiple welding ribs 121 are respectively arranged at both ends of the water conveyance pipe section. The multiple welding ribs 121 at the end of the water conveyance pipe section are arranged at equal intervals along the arc direction of the segment 1. An empty groove 122 is circumferentially formed on the outer edge of the concave surface of the segment 1. One end of the welding rib 121 extends into the empty groove 122. The cross-sectional shape of the empty groove 122 is trapezoidal with the small end facing the outer pipe wall. The adjacent two welding ribs 121 of the adjacent two segments 1 are arranged in an overlapping manner, and the two overlapping welding ribs 121 are fixedly welded together.

[0046] When the inner lining layer 103 is not required, the connection strength between adjacent segments 1 is strengthened by arranging the welding ribs 121. The empty groove 122 is used for overlapping the welding ribs 121 to prevent the welding ribs 121 from protruding from the concave surface of the segment 1. Epoxy mortar can also be filled in the empty groove 122 to seal the welding ribs 121. The cross-sectional shape of the empty groove 122 is trapezoidal with the small end facing the outer pipe wall to prevent the filled epoxy mortar from falling off.

[0047] In a feasible solution, the strengthening component includes multiple strengthening transverse ribs 101 and multiple strengthening longitudinal ribs 102. Both the strengthening transverse ribs 101 and the strengthening longitudinal ribs 102 are embedded in the segment 1. The strengthening longitudinal ribs 102 are arranged along the length direction of the segment 1. The multiple strengthening longitudinal ribs 102 are arranged at equal intervals along the circumferential direction of the segment 1. The strengthening transverse ribs 101 are arranged along the circumferential direction of the segment 1. The multiple strengthening transverse ribs 101 are arranged at equal intervals along the length direction of the segment 1.

[0048] In a feasible solution, the first waterproof structure includes a first water stop strip 110. The first water stop strip 110 is arranged at the bottom of the first installation groove and abuts against the first installation projection.

[0049] The first water stop strip 110 is located at the bottom of the first installation groove and abuts against the first installation projection, preventing the first water stop strip 110 from shifting and enhancing the waterproof effect.

[0050] In a feasible solution, the second connection structure includes a plurality of second bolt holes 114 which are respectively opened at both ends of the segment 1. The plurality of second bolt holes 114 at one end of the segment 1 are arranged at equal intervals. One end of the second bolt holes 114 located on the concave surface of the segment 1 communicates with a second plugging groove which is opened on the concave surface of the segment 1. The plurality of second bolt holes 114 of two adjacent segments 1 are arranged in one-to-one correspondence. A second bolt 117 is inserted into the corresponding two second bolt holes 114. The end of the second bolt 117 penetrates into the second plugging groove and is threadedly connected with a second nut 120. A second gasket 119 is arranged between the second nut 120 and the bottom wall of the second plugging groove, and the second gasket 119 is sleeved on the outside of the second bolt 117.

[0051] The second gasket 119 is provided with a second small hole which communicates with the second bolt hole 114. After the second bolt 117 is inserted into the second bolt hole 114 and fixed by the second nut 120, grout is poured into the second bolt hole 114 through the second small hole to consolidate the second bolt hole 114 and at the same time prevent the second bolt 117 from rusting.

[0052] In a feasible solution, the second waterproof structure includes a second waterstop strip 115 circumferentially arranged at the bottom of a plurality of second installation grooves, and the second waterstop strip 115 abuts against the second installation projection.

[0053] The second waterstop strip 115 is located at the bottom of the second installation groove and abuts against the second installation projection, which can prevent the second waterstop strip 115 from shifting and enhance the waterproof effect.

[0054] In a feasible solution, a first elastic pad 111 is arranged between two adjacent segments 1 in the same water conveyance pipe, and a second elastic pad 116 is arranged between two adjacent segments 1 of two adjacent water conveyance pipes.

[0055] The arrangement of the first elastic pad 111 and the second elastic pad 116 can effectively prevent hard contact between two adjacent segments 1, which may cause damage to the segment 1.

[0056] A construction process for a composite water conveyance pipe in a water conservancy project, which is used for the composite water conveyance pipe in a water conservancy project, comprises the following steps:

[0057] Transport the prefabricated segment 1 to the excavated tunnel, install the segments 1 circumferentially to form a water conveyance pipe section and fix it. Connect and fix the water conveyance pipe sections sequentially along the length direction of the tunnel. Through the first grouting hole 5 of the segment 1 in the water conveyance pipe, pour the first consolidation slurry behind the wall of the water conveyance pipe to form a stable layer 2, and fix the water conveyance pipe. Drill holes in the surrounding rock of the water conveyance pipe at the first grouting hole 5 to obtain a second grouting hole 4, and pour the second consolidation slurry into the second grouting hole 4 to fill the gap at the top of the water conveyance pipe and at the same time consolidate the surrounding rock of the water conveyance pipe to form a consolidation layer 3. Repeat the above steps multiple times until the construction is completed.

[0058] The first grouting holes 5 are arranged in one-to-one correspondence with the second grouting holes 4. The number of the first grouting holes 5 is 5. Taking the vertical first grouting hole 5 as the 0° reference, four first grouting holes 5 are symmetrically arranged on both opposite sides of the first grouting hole 5, and their angles are -45°, 45°, -120°, and 120° respectively.

[0059] Construction process:

[0060] Transport the prefabricated segment 1 to the excavated tunnel, enclose multiple segments 1 of the same water conveyance pipe to form a water conveyance pipe. The first installation protrusion of the segment 1 is correspondingly installed with the first installation groove of another segment 1. A first water stop strip 110 is preset in the first installation groove. Then, pass the first bolt 106 through the two adjacent first bolt holes 105, put the first gasket 108 on both ends of the first bolt 106, tighten the first nut 107 on both ends of the first bolt 106. Then, pour the first sealing material 109 into the first sealing groove, weld the edge of the inner lining layer 103, and coat the concave surface of the inner lining layer 103 with an anti-corrosion layer 104. The assembly of the water conveyance pipe is completed. Circumferentially arrange the second water stop strip 115 in the second installation groove at the end of the water conveyance pipe, dock the second installation groove at the end of the water conveyance pipe with the second installation protrusion at the end of another water conveyance pipe, pass the second bolt 117 through the two adjacent second bolt holes 114, put the second gasket 119 on both ends of the second bolt 117 and tighten it with the second nut 120. Then, seal the second sealing groove with the second sealing material 118; weld the edge of the inner lining layer 103; then, inject the first consolidation slurry into the water conveyance pipe wall through the first grouting hole 5 to fix the water conveyance pipe. Drill the second grouting hole 4 from the first grouting hole 5 to the surrounding rock outside the water conveyance pipe, and then pour the second consolidation slurry into the second grouting hole 4 to fill the void at the top of the water conveyance pipe and consolidate the surrounding rock of the water conveyance pipe at the same time. Repeat multiple times until the construction is completed.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying 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 construed as a limitation to the present invention.

[0062] The above-described embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A construction technology for a composite water conveyance pipe in a water conservancy project, which is used for constructing the composite water conveyance pipe in the water conservancy project. The composite water conveyance pipe in the water conservancy project includes multiple sequentially connected water conveyance pipe segments, and each water conveyance pipe segment includes multiple pipe segments. Adjacent two pipe segments are fixedly connected. It is characterized in that, Reinforcing components are arranged inside the segment. A first grouting hole is formed in the segment. First installation protrusions and first installation grooves are respectively arranged on two opposite sides of the segment. Both the first installation protrusions and the first installation grooves are arranged along the axial direction of the segment. The first installation protrusions and the first installation grooves of adjacent segments are adapted to each other. A first waterproof structure is arranged between the cooperating first installation protrusions and first installation grooves. Adjacent segments in the same water conveyance pipe section are fixedly connected through a first connection structure. An inner connection and reinforcement structure is arranged between adjacent segments in the same water conveyance pipe section. Second installation protrusions and second installation grooves are respectively formed at two ends of the segment. Both the second installation protrusions and the second installation grooves are arranged along the arc direction of the segment. The second installation protrusions and the second installation grooves of adjacent segments in adjacent water conveyance pipe sections are adapted to each other. A second waterproof structure is arranged between the cooperating second installation protrusions and second installation grooves. Adjacent segments in adjacent water conveyance pipe sections are fixedly connected through a second connection structure. An inner connection and reinforcement structure is arranged between adjacent segments in adjacent water conveyance pipe sections. The inner connection and reinforcement structure includes a lining layer. The lining layer is attached to the concave surface of the segment. A plurality of stud bolts are fixedly connected to the convex surface of the lining layer. The plurality of stud bolts are arranged in an array. The stud bolts are perpendicular to the convex surface of the lining layer. The stud bolts are embedded in the segment. A groove is circumferentially formed at the outer edge of the lining layer. The groove is close to the concave surface of the lining layer. The adjacent grooves of adjacent lining layers are arranged correspondingly. The adjacent lining layers are fixedly connected by welding at the grooves. Or The inner connection and reinforcement structure includes a plurality of welding ribs. The welding ribs are embedded in the segment. In the same water conveyance pipe section, a plurality of welding ribs are respectively arranged on two opposite sides of the segment. The plurality of welding ribs on the same side are arranged at equal intervals along the length direction of the segment. A plurality of welding ribs are arranged at both ends of the water conveyance pipe section. The plurality of welding ribs at the end of the water conveyance pipe section are arranged at equal intervals along the arc direction of the segment. An empty groove is circumferentially formed at the outer edge of the concave surface of the segment. One end of the welding rib extends into the empty groove. The adjacent welding ribs of adjacent segments are arranged in a lapped manner. The lapped welding ribs are fixedly connected by welding. The construction technology of the composite water conveyance pipe for water conservancy projects is as follows: Transport the prefabricated segments to the excavated tunnel. Assemble the segments circumferentially into a water conveyance pipe section and fix them. Sequentially connect and fix the water conveyance pipe sections along the length direction of the tunnel. Through the first grouting hole of the segment in the water conveyance pipe, pour the first consolidation grout behind the wall of the water conveyance pipe to form a stable layer, and fix the water conveyance pipe. Drill holes in the surrounding rock around the water conveyance pipe at the first grouting hole to obtain second grouting holes. Pour the second consolidation grout into the second grouting holes to fill the voids at the top of the water conveyance pipe and simultaneously consolidate the surrounding rock of the water conveyance pipe to form a consolidation layer. Repeat multiple times until the construction is completed.

2. A construction process for a composite water conveyance pipe in a water conservancy project according to claim 1, characterized in that, The first connection structure includes a plurality of first bolt holes which are respectively formed on opposite sides of the segment. The plurality of first bolt holes on one side of the segment are arranged at equal intervals. One end of the first bolt hole located on the concave surface of the segment communicates with a first plugging groove which is formed on the concave surface of the segment. The plurality of first bolt holes of adjacent segments are arranged in one-to-one correspondence. A first bolt is inserted into the corresponding two first bolt holes. The end of the first bolt extends into the first plugging groove and is threadedly connected with a first nut. A first gasket is arranged between the first nut and the bottom wall of the first plugging groove, and the first gasket is sleeved on the outer side of the first bolt.

3. A construction process for a composite water conveyance pipe in a water conservancy project according to claim 1, characterized in that, The strengthening component includes a plurality of strengthening transverse ribs and a plurality of strengthening longitudinal ribs. The strengthening transverse ribs and the strengthening longitudinal ribs are both embedded in the segment. The strengthening longitudinal ribs are arranged along the length direction of the segment, and the plurality of strengthening longitudinal ribs are arranged at equal intervals along the circumferential direction of the segment. The strengthening transverse ribs are arranged along the circumferential direction of the segment, and the plurality of strengthening transverse ribs are arranged at equal intervals along the length direction of the segment. The strengthening longitudinal ribs and the strengthening transverse ribs are both arranged in a ring shape.

4. A construction process for a composite water conveyance pipe in a water conservancy project according to claim 1, characterized in that, The first waterproof structure includes a first water stop strip which is arranged at the bottom of the first installation groove and abuts against the first installation protrusion.

5. A construction process for a composite water conveyance pipe in a water conservancy project according to claim 1, characterized in that, The second connection structure includes a plurality of second bolt holes which are respectively formed at both ends of the segment. The plurality of second bolt holes at one end of the segment are arranged at equal intervals. One end of the second bolt hole located on the concave surface of the segment communicates with a second plugging groove which is formed on the concave surface of the segment. The plurality of second bolt holes of adjacent segments are arranged in one-to-one correspondence. A second bolt is inserted into the corresponding two second bolt holes. The end of the second bolt penetrates into the second plugging groove and is threadedly connected with a second nut. A second gasket is arranged between the second nut and the bottom wall of the second plugging groove, and the second gasket is sleeved on the outer side of the second bolt.

6. A construction process for a composite water conveyance pipe in a water conservancy project according to claim 1, characterized in that, The second waterproof structure includes a second water stop strip which is circumferentially arranged at the bottom of a plurality of second installation grooves and abuts against the second installation protrusion.

7. A construction process of a composite water conveyance pipe for a water conservancy project according to claim 1, characterized in that, A first elastic pad is arranged between adjacent segments in the same water conveyance pipe section, and a second elastic pad is arranged between adjacent segments of adjacent water conveyance pipe sections.

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