Method for installing a bottom shaft of a steel plate dam

Abstract

The application discloses a bottom shaft mounting method of a steel plate dam, which comprises the following steps: 1) measuring and laying out a line; 2) mounting a bottom shaft support; 3) pouring a concrete base; and 4) hoisting and laying the bottom shaft. The application is characterized in that the concrete base is integrally formed with a construction plane, which ensures the firmness of the placement of each bottom shaft support on the construction plane, effectively limits the displacement and misplacement of the bottom shaft support, and ensures the stable support of the bottom shaft support on the bottom shaft. Meanwhile, the support base is reinforced from both ends and both sides, which effectively ensures the firmness and stability of the overall structure. Furthermore, the structure of the bottom shaft support is further designed, so that the height and transverse position of the upper support base in direct contact with the bottom shaft can be properly adjusted after the installation of the bottom shaft support, thereby ensuring the accurate positioning between the upper support bases on each bottom shaft support, reducing the installation error, and improving the actual construction quality through the accurate positioning adjustment of the upper support base.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bottom shaft construction, and particularly relates to a bottom shaft installation method for a steel plate dam. BACKGROUND

[0002] In water conservancy and hydropower construction, flap gates, sluices and rubber dams are widely used due to the needs of urban water use, landscape construction and environmental improvement, irrigation and power generation. However, the production of rubber dams is relatively complex, and the filling (inflation) dam raising or water (deflation) dam collapsing time is relatively long during operation, which affects rapid closure or flood discharge. In addition, the rubber is prone to aging, which may cause quality accidents. A large number of steel structure gates appear on the market, and the steel dam gate is a new type of adjustable air control overflow gate, which is composed of a civil structure, a steel gate body with a bottom shaft, and an opening and closing device. A support structure is arranged on the bottom shaft for auxiliary support. The existing support structure has general stability, and the support structure is prone to deformation and displacement during use, which may cause certain safety hazards. After the installation of the support structure, due to the influence of the surface flatness of the construction surface and the installation precision, there may be certain installation precision differences between the support structures at different positions, which may seriously affect the subsequent placement of the bottom shaft, thereby requiring rework adjustment and affecting the actual construction progress and increasing the construction cost.

[0003] The existing patent document discloses an invention patent of a center rotating shaft self-rotating steel dam (publication number: CN113585187A), and the technical scheme discloses a support pier on which a pre-embedded steel plate is fixed. The pre-embedded steel plate forms an arc surface for placing a shaft sleeve, and a rotating shaft passes through the shaft sleeve. As can be known from the accompanying drawings, the pre-embedded steel plate on the support pier includes a bottom pre-embedded steel plate and two pre-embedded steel plates with arc grooves. The bottom pre-embedded steel plate is fixed to the support pier by anchor bolts, and the pre-embedded steel plates with arc grooves are vertically arranged on the bottom pre-embedded steel plate for bearing matching placement. Obviously, the bottom pre-embedded steel plate and the two pre-embedded steel plates with arc grooves form a support structure in the scheme. Although the structure is simple and convenient to install, the stability of the entire support structure is generally poor, and the pre-embedded steel plate is prone to deformation during use. In addition, once there is a large installation precision difference between the multiple support structures during installation, the subsequent placement of the bottom shaft may also be affected, and the above technical problems still exist. SUMMARY

[0004] The application aims at providing a steel plate dam bottom shaft mounting method technical scheme to solve the problems in the prior art, which has a clever and reasonable structure design, strong practicability, and ensures the firmness of each bottom shaft support piece on the construction plane through the design of the concrete base and the construction plane pouring into an integrated structure, effectively limits the displacement and misplacement of the bottom shaft support piece, ensures the stable support of the bottom shaft support piece to the bottom shaft, and effectively ensures the firmness and stability of the overall structure through the reinforcement of the two ends and two sides of the support base, guarantees the stable support effect of the bottom shaft, and through the further design of the bottom shaft support piece structure, the height and transverse position of the upper support base directly contacting with the bottom shaft after the installation of the bottom shaft support piece can be properly adjusted, thereby ensuring the accurate positioning between the upper support bases of each bottom shaft support piece and reducing the installation error, so as to ensure the accuracy of the placement position of the bottom shaft through the accurate positioning adjustment of the upper support base and improve the actual construction quality.

[0005] In order to solve the above technical problems, the application adopts the following technical scheme:

[0006] A steel plate dam bottom shaft mounting method, comprising the following steps:

[0007] (1) Measurement and line laying: measure the line, determine the placement position of the bottom shaft support piece; use a level, theodolite and other measuring tools to measure and lay out the accurate placement position of the bottom shaft support piece, and ensure the construction accuracy and construction quality.

[0008] (2) Installation of the bottom shaft support piece:

[0009] a. Install the bottom support plate, place the bottom support plate at the designed position, and install and fix the bottom support plate and the construction plane through the cooperation of the mounting hole reserved on the bottom support plate and the anchor bolt; the mounting hole is reserved on the bottom support plate, thereby facilitating the installation and fixation between the bottom support plate and the construction plane, facilitating the actual construction installation, the installation of the bottom support plate and the construction plane is realized through the cooperation of the mounting hole and the anchor bolt, the installation firmness of the bottom support plate is ensured, and then the firmness of the bottom shaft support piece after installation is ensured, thereby ensuring the stable support of the bottom shaft support piece to the bottom shaft, the design is reasonable, the installation and disassembly are convenient and simple, and the number and position of the mounting holes on the bottom support plate can be adjusted according to actual needs;

[0010] b. Mark the installation positions of the four adjusting screws on the bottom support plate according to the design requirements, and then weld and fix the four adjusting screws to the specified installation positions on the bottom support plate; the four adjusting screws are evenly distributed on the bottom support plate, the overall structure firmness and stability are ensured, and the welding and fixation of the adjusting screw and the bottom support plate ensure the connection firmness, thereby improving the structure stability and reliability of the overall assembly;

[0011] c, install the auxiliary support plate, first screw the lower support nut set on each adjusting screw, then make the perforations on the auxiliary support plate correspond to the adjusting screws one by one, set the auxiliary support plate on the adjusting screws, adjust the position of the lower support nut set, so that each group of lower support nut sets supports and limits on the bottom surface of the auxiliary support plate, and at the same time ensures that the top end of the adjusting screw extends out of the auxiliary support plate by a certain length; the installation process is clear and reasonable, the perforations cooperate with the adjusting screws to realize the accurate sleeving positioning between the auxiliary support plate and the four adjusting screws, and the lower support nut set supports and limits the sleeved auxiliary support plate, ensuring the stability of the placement of the auxiliary support plate, thereby facilitating the stable installation of subsequent components on the auxiliary support plate, and at the same time ensuring that the top end of the adjusting screw extends out of the auxiliary support plate by a certain length, the length of the extension section can facilitate the accurate positioning of the side base on the auxiliary support plate, and also facilitate the screwing and installation of the upper limiting nut set on the adjusting screw, each group of lower support nut sets includes two lower support nuts, thereby ensuring that the lower support nut set stably supports the auxiliary support plate and the components installed thereon, and ensuring the overall structural strength and firmness;

[0012] d, install the side base, place the two side bases on the two ends of the auxiliary support plate respectively, each side base corresponds to two adjusting screws, the connecting holes on the side base correspond to the two adjusting screws one by one, the top end of the adjusting screw extends through and out of the connecting hole, and then the upper limiting nut set is screwed on the top end of the adjusting screw and tightened; the length of the adjusting screw extending out cooperates with the connecting hole to realize the accurate positioning and installation of the side base on the auxiliary support plate, and then the upper limiting nut set is screwed on the end of the adjusting screw, and the side base is limited and pressed on the auxiliary support plate by the upper limiting nut set, the upper limiting nut set cooperates with the lower support nut set to effectively ensure the installation firmness and reliability between the side base, the auxiliary support plate and the adjusting screw, the design is reasonable, and the installation and disassembly are convenient and simple, the cooperation between the hole and the rod realizes the accurate installation and positioning between components, without the need for measurement and marking, simplifying the actual installation operation steps, the side base assists and reinforces the two sides of the support base, thereby making the structure of the entire bottom shaft support more stable, ensuring the stable support of the bottom shaft support on the bottom shaft, and prolonging the service life of the bottom shaft support; each group of upper limiting nut sets includes two upper limiting nuts, so that the upper limiting nut set cooperates with the lower support nut set to effectively ensure the installation firmness of the auxiliary support plate on the adjusting screw and between the side base and the auxiliary support plate, and ensure the overall structural strength;

[0013] e. Install the support seat between the two side bases and the auxiliary support plate to form a placing groove, install the support seat into the placing groove, and connect and fix the support seat between the two side bases; the placing groove provides space for the installation of the support seat, facilitating the installation of the support seat, and then fixing the support seat between the two side bases ensures the firmness of the installation of the support seat, the two side bases assist in reinforcing and supporting from both sides of the support seat, making the overall structure more stable and reliable; the bottom support plate, the adjusting screw, the auxiliary support plate, the side base and the support seat are all prefabricated parts, which are designed reasonably and assembled conveniently.

[0014] (3) Pouring the concrete base:

[0015] a. Install the reinforcing side plate on the side of the auxiliary support plate, with the reinforcing side plate abutting against the side of the auxiliary support plate and the top of the reinforcing side plate abutting against the side of the support seat, and weld the reinforcing side plate to the connection between the auxiliary support plate and the support seat; the reinforcing side plate is also a prefabricated part, which is welded to one end of the bottom shaft support according to design requirements, with the bottom of the reinforcing side plate welded to the auxiliary support plate and the top end welded to the corresponding side of the support seat, so that the reinforcing side plate and the bottom shaft support are welded together as a whole;

[0016] b. According to design requirements, construct a formwork on one end of the bottom shaft support;

[0017] c. Crossly pass the steel bars through the formwork and adjust the position of the steel bars so that one end of the steel bars extends out of the formwork and abuts against the reinforcing side plate, and then bundle and fix the steel bars to the formwork;

[0018] d. Pour concrete to form a concrete base, remove the formwork, and then weld the end of the steel bar to the reinforcing side plate;

[0019] The steel bars realize the connection and fixation between the concrete base and the reinforcing side plate, and the reinforcing side plate is welded to the bottom shaft support, thereby realizing the connection and fixation between the concrete base and the bottom shaft support, connecting the concrete base and the bottom shaft support together, and directly pouring the concrete base and the construction plane together, thereby effectively preventing the displacement and misplacement of the bottom shaft support, improving the stability and firmness of the overall structure, ensuring the stable support of the bottom shaft, and improving the safety and reliability in use;

[0020] (4) Hoisting and placing of the bottom shaft:

[0021] a. First, adjust the bottom shaft support according to the installation requirements of the bottom shaft to accurately position the upper support seat of the bottom shaft support; before hoisting the bottom shaft, fine-tune the bottom shaft support according to the installation position requirements of the bottom shaft, so as to further accurately position and adjust the upper support seat, improve the position accuracy of the subsequent hoisting and placing of the bottom shaft, and ensure the construction quality of the bottom shaft;

[0022] b, the bottom shaft is hung on the bottom shaft support again.

[0023] Further, in step e of step (2), the mounting step of the support seat is as follows:

[0024] ①The support seat comprises a lower support seat, a reinforcing support rod and an upper support seat. The lower support seat is first mounted into the mounting groove. The lower support seat is provided with clamping portions at both ends. The lower support seat is clamped on the two side bases through the clamping portions. The clamping portions are provided with extension plates. The positioning holes on the extension plates are matched with the positioning columns on the side bases one by one. The end portions of the positioning columns extend out of the positioning holes. Fastening nuts are screwed into the end portions of the positioning columns and are tightened. The support seat is divided into three parts. The lower support seat is first mounted. The accurate positioning between the lower support seat and the two side bases is realized through the cooperation of the positioning holes and the positioning columns. The mounting accuracy of the lower support seat is ensured. The lower support seat and the side bases are mounted and fixed through the fastening nuts. The mounting firmness and reliability of the lower support seat are ensured.

[0025] ②The reinforcing support rod is mounted. The side base is provided with a through insertion slot one. The lower support seat is provided with a through insertion slot two. The through insertion slot one and the through insertion slot two are matched one by one. The reinforcing support rod is transversely inserted into the corresponding through insertion slot one and through insertion slot two. One end of the reinforcing support rod is movably inserted into the cavity of the corresponding side base. The arc surface at the other end of the reinforcing support rod is located in the mounting groove. After the lower support seat and the side base are assembled and fixed, the two sides of the lower support seat are supported on the side bases. The bottom of the lower support seat is supported on the auxiliary support plate. The overall structural stability and firmness are effectively ensured. The stable support of the subsequent support seat on the bottom shaft is ensured. The through insertion slot two on the lower support seat corresponds with the through insertion slot one on the side base. The preliminary insertion and mounting of the reinforcing support rod are facilitated. The reinforcing support rod is movably inserted between the corresponding through insertion slot one and through insertion slot two. One end of the reinforcing support rod extends into the cavity in the side base. The cavity in the side base has a certain space. The space is reserved for the transverse adjustment of the reinforcing support rod. The transverse adjustment of the reinforcing support rod along with the upper support seat is facilitated. The arc surface at the other end of the reinforcing support rod is located in the mounting groove. The further mounting and fixing between the reinforcing support rod and the upper support seat are facilitated.

[0026] ③The upper support seat is mounted. The upper support seat is placed on the lower support seat. The upper support seat is provided with support blocks at both ends. The support blocks are supported and placed on the corresponding clamping portions. The bottom support of the upper support seat is slidably inserted into the positioning groove on the lower support seat. The bottom support is slidably inserted into the positioning groove. The preliminary positioning and mounting between the upper support seat and the lower support seat are realized. The support blocks are supported on the clamping portions. The preliminary mounting stability of the upper support seat is ensured.

[0027] ④The bottom support side is provided with an expansion plate, the expansion plate is provided with a limiting column, the lower support seat side is provided with an adjusting seat, the adjusting seat is supported on the auxiliary support plate, the adjusting seat and the expansion plate are matched one by one, the adjusting seat is provided with an adjusting groove, the limiting column is movably connected in the corresponding adjusting groove, and the end of the limiting column extends out of the adjusting groove, and then the end of the limiting column is screwed into the fixing nut and tightened; the limiting column and the adjusting groove cooperate to realize the further insertion positioning between the upper support seat and the lower support seat, and then the fixing nut is used to limit and fix the upper support seat and the lower support seat, so that the installation firmness between the two is ensured;

[0028] ⑤Move the reinforcing support rod so that the arc surface of the reinforcing support rod is attached to the side of the upper support seat, then weld the reinforcing support rod and the upper support seat, move the reinforcing support rod so that the arc surface is attached to the side of the upper support seat, then weld the two, so that the reinforcing support rod and the upper support seat are welded as a whole, the reinforcing support rod can assist the support of the upper support seat, the structure of the upper support seat is more firm and stable, and deformation is not easy, the stable support of the upper support seat to the bottom shaft is ensured, and the design of the arc surface can ensure the contact area between the reinforcing support rod and the upper support seat, improve the welding firmness between the reinforcing support rod and the upper support seat, and the structure design is ingenious and reasonable.

[0029] Further, in step a of step (4), the adjusting method of the bottom shaft support is as follows:

[0030] ①Adjust the auxiliary support frame, rotate the lower support foot to the auxiliary support plate direction until the threaded column moves to the limit position in the limiting sleeve; first adjust the auxiliary support frame so that the overall height of the auxiliary support frame is the minimum value in the adjustable range, which will not affect the subsequent adjustment of the height of the auxiliary support plate on the adjusting screw;

[0031] ②Loosen the lower support nut set and the upper limiting nut set, adjust the height of the auxiliary support plate on the adjusting screw according to the installation height requirement of the bottom shaft, so as to realize the height adjustment of the upper support seat, after the height adjustment of the upper support seat is completed, tighten the lower support nut set and the upper limiting nut set, and then rotate the lower support foot to the bottom support plate direction until the lower support foot is supported on the bottom support plate; loosen the lower support nut set and the upper limiting nut set, and then further fine-tune and calibrate the height of the auxiliary support plate on each bottom shaft support according to the installation requirement, so as to improve the installation accuracy of the upper support seat and ensure that each bottom shaft support is accurately in place, the design is reasonable, the adjustment is convenient and simple, after the height of the auxiliary support plate is adjusted, the auxiliary support frame is adjusted so that the lower support foot is supported on the bottom support plate, so as to ensure the auxiliary support and reinforcement effect of the auxiliary support frame on the whole equipment;

[0032] ③ Loosen the fixing nut, move the limiting column along the adjusting groove, so as to realize the adjustment of the transverse position of the upper support seat. When the upper support seat moves, the bottom support moves synchronously along the positioning groove, and at the same time, the reinforcing support rod is always guided and limited by the through slot one and the through slot two, until the upper support seat moves to the position, the fixing nut is tightened, after the height is adjusted, the precise fine adjustment of the transverse position of the upper support seat is carried out, the precision of the placing position of the upper support seat is further improved, so as to ensure the supporting and reinforcing effect of the upper support seat on the bottom shaft.

[0033] Further, in step (2), after the support seat is installed, the auxiliary support frame is installed, and the installation steps of the auxiliary support frame are as follows:

[0034] ① The auxiliary support frame comprises an upper inserting block, a lower supporting leg and a compression spring. The lower supporting legs are uniformly distributed below the upper inserting block. The upper inserting block is provided with a limiting sleeve, and the lower supporting leg is provided with a threaded column which is screwed into the corresponding limiting sleeve. The compression spring is sleeved outside the limiting sleeve, and is always compressed between the upper inserting block and the lower supporting leg;

[0035] ② The lower supporting leg is adjusted, and the length of the threaded column screwed into the limiting sleeve is adjusted, so that the length of the threaded column screwed into the limiting sleeve in the initial state is the maximum value in the adjustable range of the screwing length;

[0036] ③ The upper inserting block is inserted into the installation groove at the bottom of the auxiliary support plate, and the lower supporting leg is turned towards the bottom support plate until the lower supporting leg is supported on the bottom support plate;

[0037] The auxiliary support frame can provide auxiliary support and reinforcement to the bottom of the auxiliary support plate, so that the structure of the whole bottom shaft support piece is more firm and reliable, the overall carrying capacity is better, deformation is less likely to occur, and stable support to the bottom shaft can be ensured, thereby effectively improving the use safety and reliability of the device.

[0038] Further, after step a of step (4), the installation of the side reinforcing member is carried out first, and the installation steps of the side reinforcing member are as follows:

[0039] ① The side reinforcing member comprises a connecting head, a connecting plate and a supporting bottom. The connecting head and the supporting bottom are prefabricated parts, and the connecting plate is cut on site according to the actual height of each bottom shaft support piece after adjustment and in cooperation with the design size of the connecting head and the supporting bottom. The connecting plate is cut on site according to the actual height of each bottom shaft support piece after adjustment and in cooperation with the size of the connecting head and the supporting bottom. The structure design is reasonable, the universal connecting head and supporting bottom prefabricated parts are adopted, and the connecting plate of corresponding height is cut on site, and the three are assembled into a side reinforcing member, without the need to customize a plurality of side reinforcing member prefabricated parts of different sizes, thereby effectively saving costs;

[0040] ②Welding and fixing the two ends of the connecting plate with the connecting head and the supporting bottom respectively to assemble the side reinforcing part; welding and fixing ensures the firmness of the structure of the assembled side reinforcing part, thereby ensuring the reinforcing and supporting effect of the side reinforcing part on the side of the bottom shaft supporting part, making the structure of the bottom shaft supporting part more stable, ensuring the stable support of the bottom shaft, and prolonging the service life;

[0041] ③Connecting the side reinforcing part with the upper supporting seat, the auxiliary holes on the connecting head corresponding to the connecting columns on the upper supporting seat one by one, the connecting head being sleeved on the connecting columns through the auxiliary holes, and the limiting nuts being screwed on the end of the connecting columns and tightened; through the auxiliary holes cooperating with the connecting columns, the precise installation and positioning of the side reinforcing part and the upper supporting seat are realized, and through the limiting nuts, the firmness of the assembly between the side reinforcing part and the upper supporting seat is ensured, which is reasonable in design, convenient and simple in assembly and disassembly;

[0042] ④Installing and fixing the side reinforcing part with the construction plane through the fixing holes reserved on the supporting bottom cooperating with the foot screws; the fixing holes cooperating with the foot screws fix the supporting bottom with the construction plane, realize the installation and fixation between the side reinforcing part and the construction plane, effectively ensure the reinforcing and supporting effect of the side reinforcing part on the bottom shaft supporting part, make the overall structure more firm and reliable, and ensure the stable support of the bottom shaft.

[0043] Further, in the installation step ② of the side reinforcing part, after the two ends of the connecting plate are welded and fixed with the connecting head and the supporting bottom respectively, the reinforcing rib plate is cut out, the reinforcing rib plate is erected at the connecting place of the connecting plate and the supporting bottom, and the reinforcing rib plate is welded and fixed with the connecting plate and the supporting bottom, thereby enhancing the overall structural strength of the side reinforcing part through the reinforcing rib plate, improving the structural firmness, making the side reinforcing part not easy to deform, and ensuring the supporting and reinforcing effect of the side reinforcing part on the bottom shaft supporting part.

[0044] The present application has the following beneficial effects due to the adoption of the above technical solutions:

[0045] The present application has the following beneficial effects due to the adoption of the above technical solutions: The structure of the present application is ingenious and reasonable, has strong practicability, clear principle, easy real-time operation, and is easy to popularize; through the design of the concrete base and the construction plane being poured into an integrated structure, the firmness of the placement of each bottom shaft supporting part on the construction plane is ensured, the displacement and misplacement of the bottom shaft supporting part are effectively limited, the stable support of the bottom shaft supporting part on the bottom shaft is ensured, the overall structural firmness and stability are effectively ensured through the reinforcement and strengthening from both ends and both sides of the supporting seat, the stable support effect on the bottom shaft is ensured, and through the further design of the structure of the bottom shaft supporting part, the height and transverse position of the upper supporting seat directly contacting the bottom shaft after the installation of the bottom shaft supporting part can be properly adjusted, thereby ensuring the precise positioning between the upper supporting seats on each bottom shaft supporting part, reducing the installation error, ensuring the accuracy of the placement position of the bottom shaft through the precise positioning adjustment of the upper supporting seat, and improving the actual construction quality. Attached Figure Description

[0046] The present invention will be further described below with reference to the accompanying drawings:

[0047] Figure 1 This is a schematic diagram of the structure of the present invention after the adjusting screw is installed on the bottom support plate;

[0048] Figure 2 This is a schematic diagram of the structure of the present invention after the auxiliary support plate and adjusting screw are installed;

[0049] Figure 3 This is a schematic diagram of the structure of the present invention after the side base is installed on the auxiliary support plate;

[0050] Figure 4 This is a schematic diagram of the structure of the present invention after the lower support base is installed in the mounting slot;

[0051] Figure 5 This is a schematic diagram of the structure of the present invention after the reinforcement support rod has been initially inserted;

[0052] Figure 6 This is a schematic diagram of the structure of the present invention after the upper support base and the lower support base are installed;

[0053] Figure 7 This is a schematic diagram of the structure of the present invention after the auxiliary support frame has been installed;

[0054] Figure 8 This is a schematic diagram of the structure of the present invention after the side reinforcement is installed;

[0055] Figure 9 This is a schematic diagram of the structure of the present invention after the reinforced side plate has been installed;

[0056] Figure 10 This is a schematic diagram of the structure of the present invention after the concrete base has been poured.

[0057] Figure 11 This is a schematic diagram of the side base structure in this invention;

[0058] Figure 12 This is a schematic cross-sectional view of the side base in this invention;

[0059] Figure 13 This is a schematic diagram of the auxiliary support plate in this invention;

[0060] Figure 14 This is a schematic diagram of the lower support base in this invention;

[0061] Figure 15 This is a schematic diagram of the upper support base in this invention;

[0062] Figure 16 The exploded view of the auxiliary support frame in the application;

[0063] Figure 17 The schematic view of the connecting structure between the bottom shaft support and the concrete base in the application;

[0064] Figure 18 The structural schematic view of the side reinforcing member in the application.

[0065] In the figure: 1-bottom support plate; 2-mounting hole; 3-adjusting screw; 4-auxiliary support plate; 5-lower support nut set; 6-side base; 7-upper limit nut set; 8-connection hole; 9-support seat; 10-perforation; 11-concrete base; 12-reinforcing side plate; 13-steel bar; 14-mounting groove; 15-lower support seat; 16-upper support seat; 17-through slot one; 18-clamping part; 19-extension plate; 20-positioning hole; 21-positioning column; 22-tightening nut; 23-reinforcing support rod; 24-through slot two; 25-support block; 26-bottom support; 27-positioning groove; 28-expanding plate; 29-limiting column; 30-adjusting seat; 31-adjusting groove; 32-fixing nut; 33-upper insertion block; 34-lower support leg; 35-compression spring; 36-limiting sleeve; 37-threaded column; 38-cavity; 39-auxiliary support frame; 40-side reinforcing member; 41-connection head; 42-connection plate; 43-supporting bottom; 44-auxiliary hole; 45-connection column; 46-limiting nut; 47-putting groove; 48-reinforcing rib plate; 49-fixing hole. DETAILED DESCRIPTION

[0066] As Figures 1 to 18 shown, the bottom shaft installation method of a steel plate dam in the application includes the following steps:

[0067] (1) Measurement and line laying: measure the line and determine the placement position of the bottom shaft support; use a level, theodolite and other measuring tools to measure and lay out the accurate placement position of the bottom shaft support to ensure construction accuracy and construction quality

[0068] (2) Installation of the bottom shaft support:

[0069] a, install the bottom support plate 1, place the bottom support plate 1 at the designed position, and install and fix the bottom support plate 1 and the construction plane by cooperating with the anchor bolt through the reserved mounting hole 2 on the bottom support plate 1; the bottom support plate 1 is reserved with the mounting hole 2, so as to facilitate the installation and fixation between the bottom support plate 1 and the construction plane, facilitate the actual construction installation, the mounting hole 2 cooperates with the anchor bolt to realize the installation between the bottom support plate 1 and the construction plane, ensure the installation firmness of the bottom support plate 1, and then ensure the firmness after the installation of the bottom shaft support, so as to ensure the stable support of the bottom shaft support to the bottom shaft, the design is reasonable, the installation and disassembly are convenient and simple, and the number and position of the mounting hole 2 on the bottom support plate 1 can be adjusted according to actual needs;

[0070] b, according to the design requirement, mark the installation position of the four adjusting screws 3 on the bottom support plate 1, and then weld and fix the four adjusting screws 3 to the specified installation position on the bottom support plate 1; the four adjusting screws 3 are evenly distributed on the bottom support plate 1, so as to ensure the overall structure firmness and stability, and the welding fixation of the adjusting screw 3 and the bottom support plate 1 ensures the connection firmness, so as to improve the structure stability and reliability after the overall assembly;

[0071] c, install the auxiliary support plate 4, first screw the lower support nut set 5 on each adjusting screw 3, then correspond the perforation 10 on the auxiliary support plate 4 with the adjusting screw 3, set the auxiliary support plate 4 on the adjusting screw 3, adjust the position of the lower support nut set 5, so that each group of lower support nut set 5 is supported and limited on the bottom surface of the auxiliary support plate 4, and at the same time, the top end of the adjusting screw 3 extends out of the auxiliary support plate 4 by a certain length; the installation process is clear and reasonable, the perforation 10 cooperates with the adjusting screw 3 to realize the accurate sleeving positioning between the auxiliary support plate 4 and the four adjusting screws 3, and the lower support nut set 5 supports and limits the sleeved auxiliary support plate 4, so as to ensure the stability of the auxiliary support plate 4, thereby facilitating the stable installation of the subsequent parts on the auxiliary support plate 4, and at the same time, the top end of the adjusting screw 3 extends out of the auxiliary support plate 4 by a certain length, the length of the extension section can facilitate the accurate positioning of the side base 6 on the auxiliary support plate 4, and also facilitate the screwing and installation of the upper limiting nut set 7 on the adjusting screw 3, each group of lower support nut set 5 includes two lower support nuts, so as to ensure the stable support of the lower support nut set 5 to the auxiliary support plate 4 and the components installed above, and ensure the overall structure strength and firmness;

[0072] d、Install the side base 6, place two side bases 6 on both ends of the auxiliary support plate 4 respectively, each side base 6 corresponds to two adjusting screws 3, the connecting holes 8 on the side base 6 correspond to the two adjusting screws 3 one by one, the top end of the adjusting screw 3 extends out of the connecting hole 8, and then the upper limiting nut set 7 is screwed on the top end of the adjusting screw 3 and tightened; the length of the adjusting screw 3 extending out of the connecting hole 8 cooperates with the connecting hole 8 to realize the accurate positioning and installation of the side base 6 on the auxiliary support plate 4, and then the upper limiting nut set 7 is screwed on the end of the adjusting screw 3, which limits and compresses the side base 6 on the auxiliary support plate 4 through the upper limiting nut set 7. The upper limiting nut set 7 cooperates with the lower supporting nut set 5 to effectively ensure the installation firmness and reliability between the side base 6, the auxiliary support plate 4 and the adjusting screw 3, which is reasonable in design, convenient and simple to install and disassemble, realizes the accurate installation and positioning between components through the cooperation of holes and rods, simplifies the actual installation operation steps, and does not need to measure the line. The two sides of the support base 9 are assisted and supported by the side base 6, so that the structure of the whole bottom shaft support is more stable, the stable support of the bottom shaft support to the bottom shaft is ensured, and the service life of the bottom shaft support is prolonged; each upper limiting nut set 7 includes two upper limiting nuts, so that the upper limiting nut set 7 cooperates with the lower supporting nut set 5 to effectively ensure the installation firmness of the auxiliary support plate 4 on the adjusting screw 3 and between the side base 6 and the auxiliary support plate 4, and the overall structural strength is ensured;

[0073] e、Install the support base 9, the two side bases 6 and the auxiliary support plate 4 form a placing groove 47, install the support base 9 into the placing groove 47, and connect and fix the support base 9 between the two side bases 6; the placing groove 47 provides space for the installation of the support base 9, facilitates the installation of the support base 9, and then fixes the support base 9 between the two side bases 6 to ensure the installation firmness of the support base 9. The two side bases 6 assist and support from both sides of the support base 9, so that the overall structure is more stable and reliable; the bottom support plate 1, the adjusting screw 3, the auxiliary support plate 4, the side base 6 and the support base 9 are all prefabricated parts, which are reasonable in design and convenient to assemble;

[0074] The installation steps of the support base 9 are as follows:

[0075] ①The support base 9 comprises a lower support base 15, a reinforcing support rod 23 and an upper support base 16. The lower support base 15 is first installed into the placing groove 47. The lower support base 15 is provided with clamping portions 18 at both ends. The lower support base 15 is clamped on the two side bases 6 through the clamping portions 18. The clamping portions 18 are provided with extension plates 19. The positioning holes 20 on the extension plates 19 are matched with the positioning columns 21 on the side bases 6 one by one. The ends of the positioning columns 21 extend out of the positioning holes 20. The ends of the positioning columns 21 are screwed into the fastening nuts 22 and are tightened. The support base 9 is divided into three parts. The lower support base 15 is first installed. The lower support base 15 and the two side bases 6 are precisely positioned through the cooperation of the positioning holes 20 and the positioning columns 21. The installation precision of the lower support base 15 is ensured. The lower support base 15 and the side bases 6 are installed and fixed through the cooperation of the fastening nuts 22. The installation firmness and reliability of the lower support base 15 are ensured.

[0076] ②The reinforcing support rod 23 is installed. The side base 6 is provided with a through slot one 17. The lower support base 15 is provided with a through slot two 24. The through slot one 17 and the through slot two 24 are matched one by one. The reinforcing support rod 23 is transversely inserted into the corresponding through slot one 17 and the through slot two 24. One end of the reinforcing support rod 23 is movably inserted into the cavity 38 of the corresponding side base 6. The arc surface at the other end of the reinforcing support rod 23 is located in the placing groove 47. After the lower support base 15 and the side base 6 are assembled and fixed, the lower support base 15 is supported on the side base 6 at both sides. The bottom of the lower support base 15 is supported on the auxiliary support plate 4. The overall structural stability and firmness are effectively ensured. The stable support of the subsequent support base 9 on the bottom shaft is ensured. The through slot two 24 on the lower support base 15 corresponds with the through slot one 17 on the side base 6. The preliminary insertion and installation of the reinforcing support rod 23 are facilitated. The reinforcing support rod 23 is movably inserted between the corresponding through slot one 17 and the through slot two 24. One end of the reinforcing support rod 23 extends into the cavity 38 in the side base 6. The cavity 38 in the side base 6 has a certain space. The transverse adjustment of the reinforcing support rod 23 is left with space. The transverse adjustment of the reinforcing support rod 23 following the transverse adjustment of the upper support base 16 is facilitated. The arc surface at the other end of the reinforcing support rod 23 is located in the placing groove 47. The further installation and fixation between the reinforcing support rod 23 and the upper support base 16 are facilitated.

[0077] ③The upper support base 16 is installed. The upper support base 16 is placed on the lower support base 15. The upper support base 16 is provided with support blocks 25 at both ends. The support blocks 25 are supported and placed on the corresponding clamping portions 18. The bottom support 26 at the bottom of the upper support base 16 is slidably inserted into the positioning groove 27 on the lower support base 15. The bottom support 26 is slidably inserted into the positioning groove 27. The preliminary positioning and installation between the upper support base 16 and the lower support base 15 is realized. The support blocks 25 are supported on the clamping portions 18. The preliminary installation stability of the upper support base 16 is ensured.

[0078] ④The side of the bottom support 26 is provided with an expansion plate 28, and the expansion plate 28 is provided with a limiting column 29. The side of the lower support base 15 is provided with an adjusting seat 30, and the adjusting seat 30 is supported on the auxiliary support plate 4, thereby further ensuring the stability of the placement of the lower support base 15. Meanwhile, the adjusting seat 30 is matched with the expansion plate 28 one by one. The adjusting seat 30 is provided with an adjusting groove 31, and the limiting column 29 is movably connected in the corresponding adjusting groove 31. The end of the limiting column 29 extends out of the adjusting groove 31, and then a fixing nut 32 is screwed into the end of the limiting column 29 and tightened. The limiting column 29 is matched with the adjusting groove 31, thereby realizing the further insertion and positioning between the upper support base 16 and the lower support base 15. Then, the fixing nut 32 is matched to limit and fix the upper support base 16 and the lower support base 15, thereby ensuring the firmness between the two;

[0079] ⑤The reinforcing support rod 23 is moved so that the arc surface of the reinforcing support rod 23 is attached to the side of the upper support base 16. Then, the reinforcing support rod 23 and the upper support base 16 are welded and fixed. The reinforcing support rod 23 is moved so that the arc surface is attached to the side of the upper support base 16. Then, the two are welded and fixed, so that the reinforcing support rod 23 and the upper support base 16 are welded as a whole. The reinforcing support rod 23 can assist in supporting the upper support base 16, so that the structure of the upper support base 16 is more firm and stable, and is not easy to deform. This ensures the firm support of the upper support base 16 on the bottom shaft. The design of the arc surface can ensure the contact area between the reinforcing support rod 23 and the upper support base 16, improve the welding firmness between the reinforcing support rod 23 and the upper support base 16, and the structure design is ingenious and reasonable;

[0080] f, install the auxiliary support frame 39. The installation steps of the auxiliary support frame 39 are as follows:

[0081] ①The auxiliary support frame 39 includes an upper insertion block 33, a lower support leg 34, and a compression spring 35. The lower support leg 34 is evenly distributed below the upper insertion block 33. The upper insertion block 33 is provided with a limiting sleeve 36, and the lower support leg 34 is provided with a threaded column 37. The threaded column 37 is matched with the limiting sleeve 36 one by one, and the threaded column 37 is screwed into the corresponding limiting sleeve 36. The compression spring 35 is sleeved outside the limiting sleeve 36, and the compression spring 35 is always compressed between the upper insertion block 33 and the lower support leg 34;

[0082] ②Adjust the lower support leg 34, and adjust the length of the threaded column 37 screwed into the limiting sleeve 36. In the initial state, the length of the threaded column 37 screwed into the limiting sleeve 36 is the maximum value in the adjustable range of the screwing length. That is, in the initial state, the height of the auxiliary support frame 39 is the minimum value in the adjustable height range, which is convenient for further adjustment of the height of the auxiliary support frame 39;

[0083] III. Inserting the upper inserting block 33 into the mounting groove 14 at the bottom of the auxiliary support plate 4, and rotating the lower supporting leg 34 towards the bottom supporting plate 1 until the lower supporting leg 34 is in contact with the bottom supporting plate 1;

[0084] The auxiliary support frame 39 can provide auxiliary support and reinforcement to the bottom of the auxiliary support plate 4, making the structure of the entire bottom shaft supporting member more stable and reliable, having better overall load capacity, being less likely to deform, and being able to better ensure stable support for the bottom shaft, effectively improving the safety and reliability of the device in use;

[0085] (3) Pouring the concrete base 11:

[0086] a. Installing the reinforcing side plate 12 on the side of the auxiliary support plate 4, with the reinforcing side plate 12 abutting against the side of the auxiliary support plate 4, and the top of the reinforcing side plate 12 abutting against the side of the support seat 9, and welding the connection between the reinforcing side plate 12 and the auxiliary support plate 4 and the support seat 9; the reinforcing side plate 12 is also a prefabricated piece, which is welded to one end of the bottom shaft supporting member according to design requirements, with the bottom of the reinforcing side plate 12 welded to the auxiliary support plate 4 and the top end of the reinforcing side plate 12 welded to the corresponding side of the support seat 9, so that the reinforcing side plate 12 is welded to the bottom shaft supporting member as a whole;

[0087] b. According to design requirements, construct a formwork on the end of the bottom shaft supporting member;

[0088] c. Transversely pass the steel bars 13 through the formwork, adjust the position of the steel bars 13 so that one end of the steel bars 13 extends out of the formwork and is in contact with the reinforcing side plate 12, and then bundle and fix the steel bars 13 and the formwork;

[0089] d. Pour concrete to form the concrete base 11, remove the formwork, and then weld the end of the steel bars 13 to the reinforcing side plate 12;

[0090] The steel bars 13 achieve connection and fixation between the concrete base 11 and the reinforcing side plate 12, and the reinforcing side plate 12 is welded to the bottom shaft supporting member, thereby achieving connection and fixation between the concrete base 11 and the bottom shaft supporting member, and the concrete base 11 and the bottom shaft supporting member are connected as a whole, and the concrete base 11 is directly poured with the construction plane as a whole, thereby effectively preventing displacement and misplacement of the bottom shaft supporting member, improving the stability and firmness of the overall structure, ensuring stable support for the bottom shaft, and improving safety and reliability in use;

[0091] (4) Hoisting and placing of the bottom shaft:

[0092] a. First, adjust the bottom shaft support components according to the installation requirements of the bottom shaft to ensure the precise positioning of the upper support seat 16 of the bottom shaft support components. Before hoisting the bottom shaft, make fine adjustments to the bottom shaft support components according to the installation position requirements of the bottom shaft, so as to further precisely position and adjust the upper support seat 16, ensuring precise positioning between the upper support seats 16 on multiple bottom shaft support components, reducing installation error accuracy, improving the position accuracy of subsequent hoisting of the bottom shaft, ensuring the construction quality of the bottom shaft, and through this design, when there is a certain installation error between the bottom shaft support components, there is no need to rework, only to adjust the position of the corresponding upper support seat 16, thereby ensuring the actual construction progress and construction quality.

[0093] The adjustment method for the bottom shaft support is as follows:

[0094] ① Adjust the auxiliary support frame 39 and rotate the lower support foot 34 towards the auxiliary support plate 4 until the threaded column 37 moves to the limit position inside the limit sleeve 36; first adjust the auxiliary support frame 39 so that the overall height of the auxiliary support frame 39 is the minimum value within the adjustable height range, which will not affect the subsequent adjustment of the height of the auxiliary support plate 4 on the adjusting screw 3;

[0095] ② Loosen the lower support nut group 5 and the upper limit nut group 7. Adjust the height of the auxiliary support plate 4 on the adjusting screw 3 according to the installation height requirements of the bottom shaft, so as to adjust the height of the upper support seat 16. After the height of the upper support seat 16 is adjusted to the correct position, tighten the lower support nut group 5 and the upper limit nut group 7, and then rotate the lower support foot 34 towards the bottom support plate 1 until the lower support foot 34 touches and supports the bottom support plate 1. Loosen the lower support nut group 5 and the upper limit nut group 7, and then make further fine adjustments and calibrations to the height of the auxiliary support plate 4 on each bottom shaft support according to the installation requirements, so as to improve the installation accuracy of the upper support seat 16, ensure that each bottom shaft support is accurately positioned, and is reasonably designed, convenient and simple to use and adjust. After the height of the auxiliary support plate 4 is adjusted, adjust the auxiliary support frame 39 so that the lower support foot 34 supports the bottom support plate 1, so as to ensure the auxiliary support frame 39 provides auxiliary support and reinforcement for the entire equipment.

[0096] ③ Loosen the fixing nut 32 and move the limiting post 29 along the adjusting groove 31 to adjust the lateral position of the upper support seat 16. When the upper support seat 16 moves, the bottom support 26 moves synchronously along the positioning groove 27. At the same time, the reinforcing support rod 23 is always guided and limited by the through slot 1 17 and through slot 2 24 until the upper support seat 16 moves into place. Tighten the fixing nut 32. After the height is adjusted, make precise fine adjustments to the lateral position of the upper support seat 16 to further improve the accuracy of the placement of the upper support seat 16, thereby ensuring the supporting and reinforcing effect of the upper support seat 16 on the bottom shaft, improving the accuracy requirements of the bottom shaft placement, and ensuring the construction quality.

[0097] b, the mounting side reinforcing member 40, the mounting steps of the side reinforcing member 40 are as follows:

[0098] ①The side reinforcing member 40 comprises a connecting head 41, a connecting plate 42 and a supporting bottom 43, the connecting head 41 and the supporting bottom 43 are prefabricated parts, and the connecting plate 42 is cut on site according to the actual height of each bottom shaft supporting part after adjustment and the design size of the connecting head 41 and the supporting bottom 43; the connecting plate 42 is cut on site according to the actual height of each bottom shaft supporting part after adjustment and the size of the connecting head 41 and the supporting bottom 43, the structure is reasonably designed, the connecting head 41 and the supporting bottom 43 are prefabricated parts, and the connecting plate 42 of the corresponding height is cut on site, the three are assembled into the side reinforcing member 40, without the need to customize a plurality of side reinforcing member 40 prefabricated parts of different sizes, thereby effectively saving costs;

[0099] ②The two ends of the connecting plate 42 are respectively welded and fixed between the connecting head 41 and the supporting bottom 43 to assemble the side reinforcing member 40; welding and fixing ensure the firmness of the structure of the assembled side reinforcing member 40, thereby ensuring the reinforcing and supporting effect of the side reinforcing member 40 on the side of the bottom shaft supporting part, making the structure of the bottom shaft supporting part more stable, ensuring the stable support of the bottom shaft and prolonging the service life;

[0100] The reinforcing rib plate 48 is cut again, the reinforcing rib plate 48 is erected at the connection between the connecting plate 42 and the supporting bottom 43, and the reinforcing rib plate 48 is welded and fixed between the connecting plate 42 and the supporting bottom 43, the overall structural strength of the side reinforcing member 40 is enhanced through the reinforcing rib plate 48, the structural firmness is improved, the side reinforcing member 40 is not easy to deform, and the reinforcing and supporting effect of the side reinforcing member 40 on the bottom shaft supporting part is ensured;

[0101] ③The side reinforcing member 40 is connected with the upper supporting seat 16, the auxiliary holes 44 on the connecting head 41 correspond to the connecting columns 45 on the upper supporting seat 16 one by one, the connecting head 41 is sleeved on the connecting column 45 through the auxiliary hole 44, and the limiting nut 46 is screwed and tightened at the end of the connecting column 45; the auxiliary hole 44 cooperates with the connecting column 45 to realize the precise installation and positioning of the side reinforcing member 40 and the upper supporting seat 16, and the limiting nut 46 ensures the firmness of the assembly between the side reinforcing member 40 and the upper supporting seat 16, which is reasonably designed and convenient and simple to assemble and disassemble;

[0102] ④The side reinforcing member 40 is installed and fixed between the construction plane through the fixing hole 49 reserved on the supporting bottom 43 and the foundation screw; the fixing hole 49 cooperates with the foundation screw to fix the supporting bottom 43 and the construction plane, realizes the installation and fixation between the side reinforcing member 40 and the construction plane, effectively ensures the reinforcing and supporting effect of the side reinforcing member 40 on the bottom shaft supporting part, makes the overall structure more firm and reliable, and ensures the stable support of the bottom shaft;

[0103] c. The bottom shaft is lowered onto the bottom shaft support.

[0104] The above merely describes specific embodiments of the present application, but the technical features of the present application are not limited thereto. Any simple change, equivalent replacement or modification made on the basis of the present application for realizing substantially the same technical effects shall be covered within the protection scope of the present application.

Claims

1. A method of installing a bottom axle of a steel plate dam, characterized by: It comprises the following steps: (1) measuring the line: measuring the line, determining the placement position of the bottom shaft support; (2) installation of the bottom shaft support: a. Install the bottom support plate, place the bottom support plate at the designed position, and install and fix the bottom support plate and the construction plane through the reserved mounting holes on the bottom support plate; b. According to the design requirements, mark the installation position of the four adjusting screws on the bottom support plate, and then weld and fix the four adjusting screws to the specified installation position on the bottom support plate; c. Install the auxiliary support plate, first screw the lower support nut group on each adjusting screw, then align the holes on the auxiliary support plate with the adjusting screws, set the auxiliary support plate on the adjusting screws, adjust the position of the lower support nut group, so that each group of lower support nut group is supported and limited on the bottom surface of the auxiliary support plate, and at the same time ensure that the top end of the adjusting screw extends out of the auxiliary support plate by a certain length; d. Install the side base, place the two side bases at the two ends of the auxiliary support plate respectively, each side base corresponds to two adjusting screws, the connecting holes on the side base correspond to the two adjusting screws one by one, the top end of the adjusting screw extends through the connecting hole, and then the upper limiting nut group is screwed on the top end of the adjusting screw and tightened; e. Install the support seat, the two side bases and the auxiliary support plate form a placing groove, install the support seat into the placing groove, and connect and fix the support seat and the two side bases; The installation steps of the support seat are as follows: The support seat comprises a lower support seat, a reinforcing support rod and an upper support seat. The lower support seat is first installed into the placing groove. The two ends of the lower support seat are provided with clamping portions. The lower support seat is clamped on the two side bases through the clamping portions. Meanwhile, the clamping portions are provided with extension plates. The positioning holes on the extension plates are matched with the positioning columns on the side bases one by one. The end portions of the positioning columns extend out of the positioning holes. Fastening nuts are screwed into the end portions of the positioning columns and are tightened. The reinforcing support rod is installed, the side base is provided with a through slot one, the lower support base is provided with a through slot two, the through slot one and the through slot two are one-to-one corresponding and matched, the reinforcing support rod is transversely inserted into the corresponding through slot one and the through slot two, one end of the reinforcing support rod is movably inserted into the cavity of the corresponding side base, and the arc surface of the other end of the reinforcing support rod is located in the placing groove. The upper support seat is installed and placed on the lower support seat, both ends of the upper support seat are provided with support blocks, the support blocks are supported and placed on the corresponding clamping portions, and the bottom support of the bottom of the upper support seat is slidably inserted into the positioning groove on the lower support seat. The bottom support side is provided with an expansion plate, the expansion plate is provided with a limiting column, the lower support seat side is provided with an adjusting seat, the adjusting seat is supported on the auxiliary support plate, the adjusting seat is matched with the expansion plate one by one, the adjusting seat is provided with an adjusting groove, the limiting column is movably connected in the corresponding adjusting groove, and the end of the limiting column extends out of the adjusting groove, and then the end of the limiting column is screwed into a fixing nut and tightened. The reinforcing support rod is moved so that the arc surface of the reinforcing support rod is attached to the side surface of the upper support base, and then the reinforcing support rod and the upper support base are welded and fixed. (3) pouring the concrete base: a. Install the reinforcing side plate on the side of the auxiliary support plate, the reinforcing side plate abuts against the side of the auxiliary support plate, and the top of the reinforcing side plate abuts against the side of the support seat, and the connecting part of the reinforcing side plate and the auxiliary support plate and the support seat is welded and fixed; b. According to the design requirements, construct the formwork on one end of the bottom shaft support; c. Cross the steel bars on the formwork, adjust the position of the steel bars, so that one end of the steel bars extends out of the formwork and abuts against the reinforcing side plate, and then bundle and fix the steel bars and the formwork; d. Pour the concrete to form the concrete base, remove the formwork, and then weld and fix the end of the steel bar and the reinforcing side plate; (4) hoisting and placing the bottom shaft: a. First, adjust the bottom shaft support according to the installation requirements of the bottom shaft, so that the upper support seat of the bottom shaft support is accurately positioned; b. Then hoist and place the bottom shaft on the bottom shaft support.

2. A method of installing a bottom axle of a steel plate dam according to claim 1, characterized in that: In step a of step (4), the adjusting method of the bottom shaft support is as follows: Adjust the auxiliary support frame, rotate the lower support foot in the direction of the auxiliary support plate until the threaded column moves to the limit position inside the limiting sleeve; Loosen the lower support nut group and the upper limit nut group, according to the installation height of the bottom shaft, adjust the height of the auxiliary support plate on the adjusting screw, so as to realize the height adjustment of the upper support seat, after the height adjustment of the upper support seat is adjusted, tighten the lower support nut group and the upper limit nut group, and then rotate the lower support foot in the direction of the bottom support plate until the lower support foot is in contact with the bottom support plate. Loosen the fixing nut, move the limiting column along the adjusting groove, so as to realize the adjustment of the transverse position of the upper support seat. When the upper support seat moves, the bottom support moves synchronously along the positioning groove, and at the same time, the reinforcing support rod is always guided and limited by the through insertion slot one and the through insertion slot two. Until the upper support seat moves to the position, tighten the fixing nut.

3. A method of installing a bottom axle of a steel plate dam according to claim 1, characterized in that: In step (2), after the installation of the support seat, the auxiliary support frame is installed, and the installation steps of the auxiliary support frame are as follows: The auxiliary support frame comprises an upper insertion block, lower support feet and compression springs, the lower support feet are uniformly distributed below the upper insertion block, the upper insertion block is provided with a limiting sleeve, the lower support feet are provided with threaded columns, the threaded columns are threadedly screwed into the corresponding limiting sleeves, the compression springs are sleeved outside the limiting sleeves, and the compression springs are always compressed and limited between the upper insertion block and the lower support feet; Adjusting the lower supporting leg, adjusting the length of the threaded column screwed into the limiting sleeve, so that the length of the threaded column screwed into the limiting sleeve in the initial state is the maximum in the adjustable range of the screwed length. The upper block is inserted into the mounting slot at the bottom of the auxiliary support plate, and the lower support leg is turned toward the bottom support plate until the lower support leg is in contact with the bottom support plate.

4. A method of installing a bottom axle of a steel plate dam according to claim 1, characterized in that: After step a of step (4), the side reinforcing member is installed first, and the installation steps of the side reinforcing member are as follows: The side reinforcing member comprises a connecting head, a connecting plate and a supporting bottom, the connecting head and the supporting bottom are prefabricated, and the connecting plate is cut on site according to the design size of the connecting head and the supporting bottom matched with the actual height of the bottom shaft supporting member after adjustment. The two ends of the connecting plate are respectively welded and fixed between the connecting head and the supporting bottom to assemble a side reinforcing piece. The side reinforcing member is connected with the upper support seat, the auxiliary holes on the connecting head part correspond to the connecting columns on the upper support seat one by one, the connecting head part is sleeved on the connecting columns through the auxiliary holes, and is screwed into the limiting nuts at the end of the connecting columns and is tightened; The side reinforcement is fixed between the construction plane by cooperating with the anchor bolt reserved on the supporting bottom.

5. A method of installing a bottom axle of a steel plate dam according to claim 4, characterized in that: In the mounting step of the side reinforcing member In the mounting step of the side reinforcing member In the mounting step of the side reinforcing member

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