Form erecting and concrete spraying method for pressureless diversion tunnel

Abstract

The application discloses a non-pressure water diversion tunnel formwork erecting concrete lining and a construction method, relates to the technical field of non-pressure water diversion tunnel formwork erecting concrete lining, and has the technical scheme that comprises a lining plate, the lining plate comprises a left vertical plate, an arc-shaped plate and a right vertical plate, the arc-shaped plate is provided with a plurality of arc-shaped plates according to the size of the inner wall of the non-pressure water diversion tunnel, the left vertical plate, the arc-shaped plate and the right vertical plate are connected to each other through a mortise-and-tenon structure, the outer wall of the combination of the left vertical plate, the plurality of arc-shaped plates and the right vertical plate is attached to the inner wall of the non-pressure water diversion tunnel, a steel mesh grid is arranged on the inner wall of the lining plate, and the steel mesh grid is arranged in an integrated structure; the left vertical plate, the arc-shaped plate and the right vertical plate are connected at the head and the tail in a structure, so that the left vertical plate, the arc-shaped plate and the right vertical plate have a certain supporting effect; and the mortise-and-tenon connecting structure is arranged to be connected, so that the components are conveniently supported.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of non-pressure diversion tunnel formwork spraying concrete lining, in particular to a non-pressure diversion tunnel formwork spraying concrete lining and construction method. BACKGROUND

[0002] In some river diversion projects, artificial tunnel excavation is used for diversion. For some projects that need to be constructed quickly, due to the small cross-section of such tunnels, it is impossible to speed up construction by increasing equipment and personnel. Therefore, people use spraying concrete construction to replace lining construction in such construction scenarios. The formwork spraying concrete construction method can speed up the construction progress of the project and save engineering investment while ensuring the strength of the lining structure and the design water flow. The principle of formwork spraying concrete construction is to combine formwork lining construction and spraying concrete support construction.

[0003] The prior art has the following disadvantages: In the prior art, when non-pressure diversion tunnel formwork spraying concrete is performed, formwork spraying concrete is generally used, and after the construction is completed, the formwork needs to be removed after the concrete hardens. During construction, an additional step of installing and removing the formwork is required. Before pouring the concrete, a steel frame structure needs to be added to the inner wall of the non-pressure diversion tunnel to improve the tensile and crack resistance. During the formwork removal process, not only is a certain amount of construction time consumed, but the formwork removal process can also cause damage to the formwork inside the non-pressure diversion tunnel. The concrete construction is prone to cracking, poor impact resistance, and poor bending fatigue performance, which is not conducive to saving construction time and saving processes.

[0004] Therefore, it is necessary to invent a non-pressure diversion tunnel formwork spraying concrete lining. SUMMARY

[0005] Therefore, the present application provides a non-pressure diversion tunnel formwork spraying concrete lining, which is connected at the head and tail by a structure comprising a left side stand, an arc plate, and a right side stand. The left side stand, the arc plate, and the right side stand have a certain supporting effect. The connection structure is connected by a mortise and tenon connection structure, which facilitates good support between the components, thereby solving the problems in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A no pressure diversion tunnel formwork spraying concrete lining, comprising a lining plate, the lining plate comprises a left side vertical plate, an arc plate and a right side vertical plate, the arc plate is provided with a plurality of according to the size of the no pressure diversion tunnel inner wall, the left side vertical plate, the arc plate and the right side vertical plate are connected by inserting and connecting each other through the mortise and tenon structure, the outer wall of the left side vertical plate, the plurality of arc plates and the right side vertical plate is combined and matched with the no pressure diversion tunnel inner wall, the inner wall of the lining plate is provided with a steel mesh, the steel mesh is provided as an integral structure, the steel mesh and the lining plate are fixedly connected on the no pressure diversion tunnel inner wall through a pin, a gap is left between the lining plate and the steel mesh, a concrete filling layer is sprayed between the lining plate and the steel mesh, and the internal material of the concrete filling layer comprises aggregate, gravel, bamboo silk, cement and river sand.

[0007] Preferably, the left side vertical plate surface is provided with a countersunk hole one, the countersunk hole one is uniformly distributed, the left side vertical plate top is provided with a T-shaped groove one, the arc plate is provided as an arc shape, and the arc plate outer wall is flexibly matched with the no pressure diversion tunnel inner wall.

[0008] Preferably, the arc plate bottom end inner wall is provided with a T-shaped groove two, the T-shaped groove two penetrates the arc plate inner wall, and the arc plate top end outer wall is fixedly installed with a T-shaped insert rib one, and two continuous arc plates are connected by inserting and connecting through the T-shaped groove two and the T-shaped insert rib one.

[0009] Preferably, the left end arc plate and the left side vertical plate are connected by inserting and connecting through the T-shaped insert rib one and the T-shaped groove one, the right end arc plate bottom end is inserted with the right side vertical plate, the right side vertical plate top is fixedly installed with a T-shaped insert rib two, and the right end arc plate and the right side vertical plate are connected by inserting and connecting through the T-shaped groove two and the T-shaped insert rib two.

[0010] Preferably, when the T-shaped groove one, the T-shaped groove two, the T-shaped insert rib one and the T-shaped insert rib two are connected by inserting and connecting each other, there is a millimeter spacing, and the spacing is used for fault tolerance when the left side vertical plate, the arc plate and the right side vertical plate expand.

[0011] Preferably, the arc plate surface is uniformly provided with a countersunk hole two, the right side vertical plate surface is uniformly provided with a countersunk hole three, the countersunk hole one, the countersunk hole two and the countersunk hole three are used for installing pins, the pin outer wall is fixedly installed with a limiting ring, and the limiting ring is used for clamping and limiting the inner wall of the countersunk hole one, the countersunk hole two and the countersunk hole three.

[0012] Preferably, the pin end is provided with a sharp end, the sharp end is used for being easily extruded into the no pressure diversion tunnel inner wall under static pressure, the pin end is fixedly installed with a pin end cover, the steel mesh surface is uniformly provided with a bolt hole, the bolt hole is matched with the countersunk hole one, the countersunk hole two and the countersunk hole three one by one, and the pin end cover is used for clamping the bolt hole.

[0013] Preferably, the steel mesh grid is uniformly provided with pouring holes for inserting the concrete spraying nozzle, and the pouring holes facilitate the introduction of concrete fluid.

[0014] Preferably, the concrete filling layer is provided with the aggregate, gravel, bamboo silk, cement, river sand and water in a proportion of 0.2:1:0.32:1:1.2:0.38, and the bamboo silk is made of bamboo with a bamboo age of more than one year.

[0015] A formwork spraying concrete lining construction method for a non-pressure diversion tunnel, comprising the following specific operation steps: S1: cleaning the impurities on the inner wall of the non-pressure diversion tunnel, keeping the inner wall of the non-pressure diversion tunnel clean and smooth, and treating the excess convex points clean;

[0016] S2: taking out the left side stand, the right side stand and a plurality of arc-shaped plates, installing the left side stand on the left side inner wall of the non-pressure diversion tunnel, so that the left side stand is tightly fitted with the left side inner wall of the non-pressure diversion tunnel, installing the right side stand on the right side inner wall of the non-pressure diversion tunnel, and then installing the arc-shaped plates from the right side to the left side in sequence, so that the T-shaped slot two and the T-shaped insert two are inserted and connected, the right side is inserted and connected between the arc-shaped plate and the right side stand, and then a plurality of arc-shaped plates are inserted and connected in sequence, and then the T-shaped insert one of the leftmost arc-shaped plate is inserted and connected with the T-shaped slot one at the top of the left side stand, so that the left side stand, the arc-shaped plate and the right side stand can form an inner lining plate;

[0017] S3: taking out the steel mesh grid and placing it on the inner wall at the bottom of the non-pressure diversion tunnel, then taking out the pin, installing the pin in the bolt hole and the countersunk hole one, fixing and connecting the left side stand on the inner wall of the non-pressure diversion tunnel, installing the pin in the bolt hole and the countersunk hole two, fixing and installing the steel mesh grid and the arc-shaped plate on the inner wall of the non-pressure diversion tunnel, installing the pin in the bolt hole and the countersunk hole three, fixing and installing the steel mesh grid and the right side stand on the inner wall of the non-pressure diversion tunnel, so that the inner lining plate and the steel mesh grid form an integral installation on the inner wall of the non-pressure diversion tunnel;

[0018] S4: static pressure is applied to the pins one by one, so that the pins are inserted into the inner wall of the non-pressure diversion tunnel, and at the same time, the limiting ring is inserted into the countersunk hole one, the countersunk hole two and the countersunk hole three, and the pin end cover is inserted into the bolt hole to fix the steel mesh grid;

[0019] S5: the nozzle of the concrete spraying equipment is inserted into the pouring hole, and then the concrete is poured into the interlayer between the inner lining plate and the steel mesh grid through the pouring hole, and after the concrete hardens, the pouring is completed.

[0020] The beneficial effects of the present application are:

[0021] 1. The left side stand, arc-shaped plate and right side stand are connected at the head and tail through the structure of cooperation, so that the left side stand, arc-shaped plate and right side stand have a certain supporting effect, and the butt joint is achieved through the mortise and tenon connection structure, so that the parts have good supporting effect;

[0022] 2. The steel mesh has the effect of conveniently enhancing the tensile and crack resistance of the concrete filling layer, so as to conveniently improve the mechanical properties of the lining plate for supporting the inner wall of the non-pressure diversion tunnel, so as to conveniently make the inner wall of the non-pressure diversion tunnel have better anti-impact performance, improve the service life and structural stability of the non-pressure diversion tunnel;

[0023] 3. The steel mesh is clamped by the pin end cap, so that the stability of the steel mesh during installation can be improved, and the pouring hole has the effect of conveniently guiding the concrete fluid into the cavity between the lining plate and the steel mesh, so as to conveniently improve the tightness of the concrete filling layer for connecting the gap between the lining plate and the steel mesh;

[0024] 4. The aggregates, gravel and bamboo filaments are mixed in the concrete filling layer, which has the effect of conveniently improving the mechanical strength of the concrete, so that the concrete has good tensile, anti-erosion and anti-cracking effect, improves the practicality and service life of the equipment, and the bamboo filaments made of bamboo with an age of more than one year have a more compact internal structure, a large density and improved structural strength of the concrete, and the materials used are low in cost, so as to conveniently improve the economy of construction. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The front view structure schematic diagram provided by the present application is provided;

[0026] Figure 2 The exploded structure schematic diagram of the lining plate provided by the present application is provided;

[0027] Figure 3 The lining plate installation structure schematic diagram provided by the present application is provided;

[0028] Figure 4 The left side stand structure schematic diagram provided by the present application is provided;

[0029] Figure 5 The right side stand structure schematic diagram provided by the present application is provided;

[0030] Figure 6 The arc-shaped plate structure schematic diagram provided by the present application is provided;

[0031] Figure 7 The concrete filling layer structure schematic diagram provided by the present application is provided;

[0032] Figure 8 A steel reinforcement grid structure schematic diagram provided by the present application;

[0033] Figure 9 A pin provided by the present application.

[0034] In the figure: inner lining plate 100, left side vertical plate 110, countersunk hole 111, T-shaped slot 112, arc plate 120, T-shaped slot 121, T-shaped insertion rib 122, countersunk hole 123, right side vertical plate 130, countersunk hole 131, T-shaped insertion rib 132, pin 200, sharp head 210, limiting ring 220, pin end cover 230, steel reinforcement grid 300, bolt hole 310, pouring hole 320, concrete filling layer 400, aggregate 410, gravel 420, bamboo filament 430, cement 440, river sand 450. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to explain and illustrate the present application, and are not used to limit the present application.

[0036] Referring to the accompanying drawings Figures 1-9The application provides a no-pressure water diversion tunnel formwork spraying concrete lining, in order to achieve the above-mentioned purpose, the application provides the following technical scheme: a no-pressure water diversion tunnel formwork spraying concrete lining, comprising a lining plate 100, the lining plate 100 comprises a left vertical plate 110, an arc plate 120 and a right vertical plate 130, the arc plate 120 is provided with a plurality of arc plates according to the size of the inner wall of the no-pressure water diversion tunnel, the left vertical plate 110, the arc plate 120 and the right vertical plate 130 are connected by inserting and connecting each other through a mortise and tenon structure, the outer wall of the combination of the left vertical plate 110, the plurality of arc plates 120 and the right vertical plate 130 is attached to the inner wall of the no-pressure water diversion tunnel, a steel mesh grid 300 is arranged on the inner wall of the lining plate 100, the steel mesh grid 300 is arranged as an integral structure, the steel mesh grid 300 and the lining plate 100 are fixedly connected on the inner wall of the no-pressure water diversion tunnel through a pin 200, a gap is left between the lining plate 100 and the steel mesh grid 300, a concrete filling layer 400 is sprayed between the lining plate 100 and the steel mesh grid 300, the internal material of the concrete filling layer 400 comprises aggregate 410, gravel 420, bamboo filament 430, cement 440 and river sand 450, specifically, the lining plate 100 has the effect of supporting the inner wall of the no-pressure water diversion tunnel, so that the inner wall of the no-pressure water diversion tunnel is prevented from being washed away by water flow during water delivery, so that the safety of the no-pressure water diversion tunnel is improved, the left vertical plate 110, the arc plate 120 and the right vertical plate 130 are connected in a head-to-tail mode, so that the left vertical plate 110, the arc plate 120 and the right vertical plate 130 have a certain supporting effect, the mortise and tenon connecting structure is arranged to butt joint, so that the parts have a good supporting effect, the left vertical plate 110, the arc plate 120 and the right vertical plate 130 are uniformly stressed, the mechanical properties are improved, the steel mesh grid 300 is arranged to conveniently enhance the adsorption performance of the concrete filling layer 400 during pouring, so that the connection between the steel mesh grid 300 and the lining plate 100 can be uniformly filled by the concrete filling layer 400, and the steel mesh grid 300 is arranged to conveniently enhance the tensile and crack resistance of the concrete filling layer 400, so that the mechanical properties of the lining plate 100 supporting the inner wall of the no-pressure water diversion tunnel are improved, so that the inner wall of the no-pressure water diversion tunnel has better impact resistance, and the service life and structural stability of the no-pressure water diversion tunnel are improved.

[0037] The left side stand plate 110 is provided with a countersunk hole one 111 on the surface, and the countersunk hole one 111 is uniformly distributed. The left side stand plate 110 is provided with a T-shaped groove one 112 on the top. The arc-shaped plate 120 is arranged in an arc shape, and the outer wall of the arc-shaped plate 120 is flexibly matched with the inner wall of the non-pressure diversion tunnel. The arc-shaped plate 120 is provided with a T-shaped groove two 121 on the inner wall of the bottom end, and the T-shaped groove two 121 penetrates the inner wall of the arc-shaped plate 120. The T-shaped insert rib one 122 is fixedly installed on the outer wall of the top end of the arc-shaped plate 120. Two continuous arc-shaped plates 120 are inserted through the cooperation of the T-shaped groove two 121 and the T-shaped insert rib one 122. The left end arc-shaped plate 120 and the left side stand plate 110 are inserted through the cooperation of the T-shaped insert rib one 122 and the T-shaped groove one 112. The right end arc-shaped plate 120 is inserted with the right side stand plate 130 at the bottom end. The right side stand plate 130 is fixedly installed with a T-shaped insert rib two 132 on the top. The right end arc-shaped plate 120 and the right side stand plate 130 are inserted through the cooperation of the T-shaped groove two 121 and the T-shaped insert rib two 132. When the T-shaped groove one 112, the T-shaped groove two 121, the T-shaped insert rib one 122 and the T-shaped insert rib two 132 are inserted, there is a 2.5mm spacing therebetween. The spacing is used for error tolerance between the left side stand plate 110, the arc-shaped plate 120 and the right side stand plate 130 when expanding. Specifically, the countersunk hole one 111, the countersunk hole two 123 and the countersunk hole three 131 have the function of installing the pin 200. The limiting ring 220 is fixedly installed on the outer wall of the pin 200, so that the limiting ring 220 can be clamped at the countersunk hole one 111, the countersunk hole two 123 and the countersunk hole three 131, so that the pin 200 can lock the inner lining plate 100 and the steel mesh grid 300. The 2.5mm spacing is left between the T-shaped groove one 112, the T-shaped groove two 121, the T-shaped insert rib one 122 and the T-shaped insert rib two 132, so as to facilitate the compensation of the left side stand plate 110, the arc-shaped plate 120 and the right side stand plate 130 when expanding. Thus, the left side stand plate 110, the arc-shaped plate 120 and the right side stand plate 130 are prevented from being squeezed by thermal expansion and cold contraction, so as to prevent the concrete filling layer 400 from being cracked after being stretched, and the protection of the concrete filling layer 400 is improved.

[0038] The arc-shaped plate 120 is uniformly provided with a countersunk hole two 123 on the surface, the right vertical plate 130 is uniformly provided with a countersunk hole three 131 on the surface, the countersunk hole one 111, the countersunk hole two 123 and the countersunk hole three 131 are used for mounting the pin 200, the pin 200 is fixedly installed with a limiting ring 220 on the outer wall, the limiting ring 220 is used for clamping and limiting the inner wall of the countersunk hole one 111, the countersunk hole two 123 and the countersunk hole three 131, the pin 200 is provided with a sharp head 210 at the end, the sharp head 210 is used for being extruded into the inner wall of the non-pressure water diversion tunnel when static pressure, the pin 200 is fixedly installed with a pin end cover 230 at the end, the steel reinforcement grid 300 is uniformly provided with a bolt hole 310 on the surface, the bolt hole 310 is matched with the countersunk hole one 111, the countersunk hole two 123 and the countersunk hole three 131 one by one, the pin end cover 230 is used for clamping the bolt hole 310, the steel reinforcement grid 300 is uniformly provided with a pouring hole 320 on the surface, the pouring hole 320 is used for inserting a concrete spraying head, the pouring hole 320 is convenient for guiding the concrete fluid, specifically, the sharp head 210 is arranged, the pin 200 can enter the soil layer of the inner wall of the non-pressure water diversion tunnel when being extruded, so that the pin 200 is more closely connected with the inner wall of the non-pressure water diversion tunnel, the pin end cover 230 is arranged, the outer wall of the steel reinforcement grid 300 is clamped, so that the stability of the steel reinforcement grid 300 can be improved during installation, the pouring hole 320 is arranged, which has the effect of guiding the concrete fluid into the cavity between the lining plate 100 and the steel reinforcement grid 300, so as to conveniently improve the tightness of the concrete filling layer 400 to the gap between the lining plate 100 and the steel reinforcement grid 300.

[0039] The proportion of the aggregate 410, the gravel 420, the bamboo filament 430, the cement 440, the river sand 450 and the water in the concrete filling layer 400 is 0.2:1:0.32:1:1.2:0.38, the bamboo filament 430 is made of bamboo with a bamboo age of more than one year, specifically, the aggregate 410, the gravel 420 and the bamboo filament 430 are mixed in the concrete filling layer 400, which has the effect of conveniently improving the mechanical strength of the concrete, so that the concrete has good tensile, anti-washing and anti-cracking effects, and the practicality and service life of the equipment are improved, the bamboo filament 430 made of bamboo with a bamboo age of more than one year is added, because the internal structure of the bamboo with a bamboo age of more than one year is more compact, the bamboo filament density is large, and the structural strength of the concrete is improved.

[0040] A non-pressure water diversion tunnel formwork spraying concrete lining construction method, including the following specific operation steps:

[0041] S1: The impurities on the inner wall of the non-pressure water diversion tunnel are cleaned, the inner wall of the non-pressure water diversion tunnel is kept clean and the surface is smooth, and the excess convex points are treated clean;

[0042] S2: take out the left side stand plate 110, the right side stand plate 130 and several arc-shaped plates 120, install the left side stand plate 110 on the left side inner wall of the non-pressure diversion tunnel, so that the left side stand plate 110 is tightly fitted with the left side inner wall of the non-pressure diversion tunnel, install the right side stand plate 130 on the right side inner wall of the non-pressure diversion tunnel, then install the arc-shaped plates 120 from right to left in turn, so that the T-shaped groove two 121 and the T-shaped edge two 132 are matched and inserted, the right side makes the arc-shaped plate 120 and the right side stand plate 130 be inserted and connected, then a plurality of arc-shaped plates 120 are inserted and connected in turn, then the T-shaped edge one 122 of the leftmost arc-shaped plate 120 is inserted and connected with the T-shaped groove one 112 at the top of the left side stand plate 110, so that the left side stand plate 110, the arc-shaped plate 120 and the right side stand plate 130 can form the inner lining plate 100;

[0043] S3: take out the steel mesh grid 300 and place it on the bottom inner wall of the non-pressure diversion tunnel, then take out the pin 200, install the pin 200 in the bolt hole 310 and the countersunk hole one 111, fix and connect the left side stand plate 110 on the inner wall of the non-pressure diversion tunnel, install the pin 200 in the bolt hole 310 and the countersunk hole two 123, so that the steel mesh grid 300 is fixed and installed with the arc-shaped plate 120 on the inner wall of the non-pressure diversion tunnel, install the pin 200 in the bolt hole 310 and the countersunk hole three 131 inner wall, so that the steel mesh grid 300 is fixed and installed with the right side stand plate 130 on the inner wall of the non-pressure diversion tunnel, so that the inner lining plate 100 and the steel mesh grid 300 form an integral installation on the inner wall of the non-pressure diversion tunnel;

[0044] S4: by static pressure on the pin 200 one by one, the pin 200 is inserted into the inner wall of the non-pressure diversion tunnel, at the same time, the limiting ring 220 enters the countersunk hole one 111, the countersunk hole two 123 and the countersunk hole three 131, and the pin end cover 230 enters the bolt hole 310 to fix the steel mesh grid 300;

[0045] S5: by inserting the nozzle of the concrete spraying equipment into the pouring hole 320, then pouring concrete in the interlayer between the inner lining plate 100 and the steel mesh grid 300 through the pouring hole 320, after the concrete hardens, it can be used.

[0046] The above is only the preferred embodiment of the present application, any skilled person in the art can modify the present application by using the above-mentioned technical solutions or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement according to the technical solution of the present application is within the scope of protection claimed by the present application.

Claims

1. A formwork spraying concrete lining of a non-pressure diversion tunnel, comprising a lining plate (100), the lining plate (100) comprising a left vertical plate (110), an arc-shaped plate (120) and a right vertical plate (130), characterized in that: The arc-shaped plates (120) are provided according to the size of the inner wall of the non-pressure diversion tunnel, the left vertical plate (110), the arc-shaped plate (120) and the right vertical plate (130) are connected by the mortise and tenon structure, the outer wall of the combination of the left vertical plate (110), the arc-shaped plates (120) and the right vertical plate (130) is attached to the inner wall of the non-pressure diversion tunnel, the inner wall of the lining plate (100) is provided with a steel mesh grid (300), the steel mesh grid (300) is provided as an integral structure, the steel mesh grid (300) and the lining plate (100) are fixedly connected on the inner wall of the non-pressure diversion tunnel through the dowel (200), a gap is left between the lining plate (100) and the steel mesh grid (300), a concrete filling layer (400) is sprayed between the lining plate (100) and the steel mesh grid (300), the internal material of the concrete filling layer (400) comprises aggregate (410), gravel (420), bamboo silk (430), cement (440) and river sand (450), the left vertical plate (110) is provided with sunken head holes (111) on the surface, the sunken head holes (111) are uniformly distributed, the left vertical plate (110) is provided with T-shaped grooves (112) on the top, the arc-shaped plate (120) is provided as an arc shape, the outer wall of the arc-shaped plate (120) is flexibly attached to the inner wall of the non-pressure diversion tunnel, the inner wall of the bottom end of the arc-shaped plate (120) is provided with T-shaped grooves (121), the T-shaped grooves (121) penetrate the inner wall of the arc-shaped plate (120), the arc-shaped plate (120) is provided with T-shaped inserted edges (122) on the outer wall of the top end, two continuous arc-shaped plates (120) are connected through the T-shaped grooves (121) and the T-shaped inserted edges (122), the left end of the arc-shaped plate (120) and the left vertical plate (110) are connected through the T-shaped inserted edges (122) and the T-shaped grooves (112), the right end of the arc-shaped plate (120) is connected with the right vertical plate (130), the right vertical plate (130) is provided with T-shaped inserted edges (132) on the top, the right end of the arc-shaped plate (120) and the right vertical plate (130) are connected through the T-shaped grooves (121) and the T-shaped inserted edges (132), the arc-shaped plate (120) is provided with sunken head holes (123) on the surface, the right vertical plate (130) is provided with sunken head holes (131) on the surface, the sunken head holes (111), the sunken head holes (123) and the sunken head holes (131) are used for mounting the dowels (200), the dowels (200) are provided with limiting rings (220) on the outer wall, the limiting rings (220) are used for clamping and limiting the inner wall of the sunken head holes (111), the sunken head holes (123) and the sunken head holes (131), the dowels (200) are provided with sharp heads (210) on the end, the sharp heads (210) are used for being easily squeezed into the inner wall of the non-pressure diversion tunnel under static pressure, the dowels (200) are provided with dowel end covers (230) on the end,The steel reinforcement grid (300) is uniformly provided with bolt holes (310) on the surface, the bolt holes (310) are matched with the countersunk hole one (111), the countersunk hole two (123) and the countersunk hole three (131) one by one, the pin end cover (230) is used for clamping the bolt hole (310), the steel reinforcement grid (300) is uniformly provided with pouring holes (320) on the surface, the pouring holes (320) are used for inserting the concrete spraying nozzle, and the pouring holes (320) facilitate the introduction of the concrete fluid. The construction method of the formwork spraying concrete lining of the non-pressure diversion tunnel comprises the following specific operation steps: S1: The impurities on the inner wall of the non-pressure diversion tunnel are cleaned, the inner wall of the non-pressure diversion tunnel is kept clean and smooth, and the excess convex points are cleaned; S2: The left vertical plate (110), the right vertical plate (130) and a plurality of arc-shaped plates (120) are taken out, the left vertical plate (110) is installed on the left inner wall of the non-pressure diversion tunnel, so that the left vertical plate (110) is tightly fitted with the left inner wall of the non-pressure diversion tunnel, the right vertical plate (130) is installed on the right inner wall of the non-pressure diversion tunnel, then the arc-shaped plates (120) are sequentially installed from right to left, so that the T-shaped slot two (121) and the T-shaped rib two (132) are matched and inserted, the arc-shaped plates (120) are inserted and connected with the right vertical plate (130) on the right side, then a plurality of arc-shaped plates (120) are sequentially inserted and connected, then the T-shaped rib one (122) of the leftmost arc-shaped plate (120) is inserted and connected with the T-shaped slot one (112) at the top of the left vertical plate (110), so that the left vertical plate (110), the arc-shaped plates (120) and the right vertical plate (130) can form the lining plate (100); S3: The steel mesh grid (300) is taken out and placed on the inner wall at the bottom of the non-pressure diversion tunnel, then the pin (200) is taken out, the pin (200) is installed in the bolt hole (310) and the countersunk hole one (111), the left vertical plate (110) is fixedly connected on the inner wall of the non-pressure diversion tunnel, the pin (200) is installed in the bolt hole (310) and the countersunk hole two (123), so that the steel mesh grid (300) is fixedly installed on the inner wall of the non-pressure diversion tunnel with the arc-shaped plate (120), the pin (200) is installed in the bolt hole (310) and the countersunk hole three (131) on the inner wall, so that the steel mesh grid (300) is fixedly installed on the inner wall of the non-pressure diversion tunnel with the right vertical plate (130), so that the lining plate (100) and the steel mesh grid (300) form an integral installation on the inner wall of the non-pressure diversion tunnel; S4: The pins (200) are statically pressed one by one, so that the pins (200) are inserted into the inner wall of the non-pressure diversion tunnel, at the same time, the limiting ring (220) enters the countersunk hole one (111), the countersunk hole two (123) and the countersunk hole three (131), and the pin end cover (230) enters the bolt hole (310) to fix the steel mesh grid (300); S5: The nozzle of the spraying concrete equipment is inserted into the pouring hole (320), then the interlayer between the lining plate (100) and the steel mesh grid (300) is poured with concrete through the pouring hole (320), and the concrete is hardened after pouring.

2. A formwork erecting and concrete spraying inner lining for a non-pressure diversion tunnel according to claim 1, characterized in that, When the T-shaped slot one (112), the T-shaped slot two (121), the T-shaped rib one (122) and the T-shaped rib two (132) are inserted, there is a 2.5mm spacing between them, which is used for error tolerance when the left vertical plate (110), the arc-shaped plate (120) and the right vertical plate (130) expand.

3. A formwork erecting and concrete spraying inner lining for a non-pressure diversion tunnel according to claim 1, characterized in that, The concrete filling layer (400) is made of aggregate (410), gravel (420), bamboo silk (430), cement (440), river sand (450) and water, and the proportion of the aggregate (410), the gravel (420), the bamboo silk (430), the cement (440), the river sand (450) and the water is 0.2:1:0.32:1:1.2:0.38, and the bamboo silk (430) is made of bamboo with an age of more than one year.

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