CN113481945B - Flexible steel dam construction method - Google Patents
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- CN113481945B CN113481945B CN202110862297.2A CN202110862297A CN113481945B CN 113481945 B CN113481945 B CN 113481945B CN 202110862297 A CN202110862297 A CN 202110862297A CN 113481945 B CN113481945 B CN 113481945B
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Abstract
The invention provides a construction method of a flexible steel dam, which belongs to the technical field of hydraulic engineering, wherein the flexible steel dam comprises a dam body, a concrete base, a concrete dam abutment and channel steel, wherein the channel steel is arranged in the concrete base, and the bottom of the dam body is connected in a notch of the channel steel; the dam body comprises a plurality of dam body layers which are mutually stacked and connected from bottom to top, and each dam body layer comprises a plurality of steel plate units which are mutually welded; two sides of the dam body are connected with the concrete dam shoulder, and the bottom of the concrete dam shoulder is connected with the concrete base to form the flexible steel dam. The dam body has the characteristics of high strength and good flexibility, and the dam body has good tensile property; meanwhile, the method has the advantages of environmental protection, economy, short construction period and convenience in disassembly and construction.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a construction method of a flexible steel dam.
Background
The dam is a water retaining structure which intercepts river water flow and stores the water in front of the dam to form a reservoir area. Earth dams, rock-fill dams, masonry dams, concrete dams, etc. are commonly used. The steel dam has a history of more than 120 years from now, and the types of the steel dam mainly comprise an inclined plane steel dam, an arch steel dam, a flexible inverted arch steel dam and the like; at present, the number of steel dams is small, so that reference materials for construction processes and methods are not large, particularly, when the flexible steel dam is used as a light structure, technical problems existing in the construction process of the flexible steel dam, such as the problem of auxiliary fixing of steel plates during welding, the problem of effective connection between a dam body and a concrete base and a concrete dam shoulder, and the like need to be researched and solved, and based on the technical problems, the construction method of the flexible steel dam is provided.
Disclosure of Invention
In order to solve the problems in the prior art, a flexible steel dam construction method is provided.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the invention provides a construction method of a flexible steel dam, wherein the flexible steel dam comprises a dam body, a concrete base, a concrete dam abutment and channel steel, wherein the channel steel is arranged in the concrete base, and the bottom of the dam body is connected in a notch of the channel steel; the dam body comprises a plurality of dam body layers which are mutually stacked and connected from bottom to top, and each dam body layer comprises a plurality of steel plate units which are mutually welded; the two side edges of the dam body are connected with the concrete dam shoulders, and the bottoms of the concrete dam shoulders are connected with the concrete bases to form the flexible steel dam; the method comprises the following steps:
cutting, blanking and processing in a factory according to design requirements to finish the manufacture of a steel plate unit and channel steel;
step two, constructing a concrete base: cleaning a reservoir area, supporting a template in the reservoir area, pouring concrete to form a concrete base, and embedding channel steel in pouring;
step three, constructing a first dam body layer positioned at the bottommost part: placing the steel plate units in the notches of the channel steels and welding to complete the welding and fixing of the first steel plate unit in the dam body layer and the channel steels; then, a second steel plate unit is placed close to the first steel plate unit and welded to complete the welding and fixing of the second steel plate unit in the dam body layer, and meanwhile, the second steel plate unit and the first steel plate unit are welded and connected into a whole; according to the principle, all the steel plate units in the dam body layer are welded completely;
step four, constructing other dam body layers to form a dam body; when a second layer of dam body layer is constructed, stacking a first steel plate unit in the second layer of dam body layer on the top of the first layer of dam body layer, carrying out auxiliary fixing through a special flexible steel dam welding auxiliary tool, and then welding the steel plate unit with the first layer of dam body layer; then, a second steel plate unit is placed at the adjacent position and clings to the first steel plate unit of the layer, and auxiliary fixing is carried out by using a special flexible steel dam welding auxiliary tool again; then welding the second steel plate unit with the first dam body layer and welding the second steel plate unit with the first steel plate unit; repeating the process until all the steel plate units in the second dam body layer are welded completely; according to the principle, the rest other dam body layers are constructed upwards until the dam body is formed;
step five, respectively welding and/or bolting pre-buried steel plates at two ends of the formed dam body;
and step six, erecting templates around the embedded steel plates, wrapping the embedded steel plates by the templates, pouring concrete to form the concrete dam abutment, and connecting the concrete dam abutment with the dam body and the concrete base to form the flexible steel dam.
The flexible steel dam welding auxiliary tool comprises a main rod, wherein the upper end and the lower end of the main rod are respectively connected with a cross arm; the end part of the cross arm is connected with a magnet; the main rod is movably sleeved with a sleeve, and the sleeve is connected with a first fastening screw for fixing the sleeve; the outer wall of the sleeve is also connected with a connecting rod, the other end of the connecting rod is connected with a buckle, the buckle is in an inverted U shape, and the side wall of the buckle is connected with a second fastening screw for locking; the specific application method is as follows: when a second dam body layer is constructed, stacking a first steel plate unit in the dam body layer on the top of the first dam body layer and positioning, then holding the main rod by hand, adsorbing a magnet positioned above the first steel plate unit on the surface of the first steel plate unit, and adsorbing a magnet positioned below the first steel plate unit on the surface of the first dam body layer at a corresponding position; simultaneously, rotating the sleeve, adjusting the position of the sleeve up and down to enable the buckle to be clamped at the top of the first layer of dam body layer, and screwing a first fastening screw to complete positioning and fixing of the sleeve; rotating the second fastening screw to tightly clamp the buckle on the top edge of the first dam body layer; after the fixation is finished, welding; repeating the process until all other steel plate units in the second dam body layer are welded, and when the steel plate unit at the tail end of the dam body layer is constructed, only the magnet is used for adsorption and fixation, and the buckle is not needed to be used for clamping; and (4) building other residual dam body layers upwards according to the principle until the dam body is formed.
When the first steel plate unit is not fixed in the dam body layer, another independent buckle is adopted for auxiliary fixation; the buckle clamps and fixes the current steel plate unit and the adjacent steel plate unit together; the structure of the independent fastener is the same as that of the fastener in the auxiliary welding tool for the flexible steel dam, and the independent fastener and the fastener are provided with second fastening screws; when the flexible steel dam welding auxiliary tool is used, the independent buckles are arranged diagonally with the buckles in the flexible steel dam welding auxiliary tool.
And in the fourth step, after the dam body is formed, welding an overflow plate at the top of the dam body.
And step six, welding a plurality of first anchor bars on the surface of the embedded steel plate before pouring.
And in the second step, a plurality of second anchor bars are welded at the bottom of the channel steel before pouring.
And seventhly, constructing an impermeable layer in the notch of the channel steel to realize impermeable water stop.
The dam body is tightly attached to the inner wall behind the notch and welded together; the bottom of the dam body is also welded with the bottom wall of the notch; a double-side welding seam mode is adopted between the dam body and the channel steel.
Step eight, coating an anti-corrosion layer on the surface of the dam body, wherein the anti-corrosion layer comprises an anti-rust primer and a finish paint, and the specific directions are as follows: firstly, carrying out rust removal treatment on a dam body; then adding an aluminum chromium-free passivator into the antirust primer, coating the antirust primer on the surface of the dam body, and finally coating a layer of finish.
Compared with the prior art, the invention has the beneficial effects that:
1. structurally, the dam body is made of steel plates, and the characteristics of high strength and good flexibility of the steel plates are fully utilized, so that the dam body has good stretchability; the steel plate units in the dam body can be processed and manufactured in a factory and then transported to a construction site for welding and assembling, and the steel plate units occupy small area and are convenient to transport; the flexible steel dam comprises a dam body, a concrete base and a concrete dam abutment, and has the advantages of simple construction, short construction period, safe and reliable operation and convenience in later maintenance and management in the construction process; the dam body is convenient to disassemble and build, the disassembled dam body can be reused, the cost is saved, the dam body can be directly cut off during disassembly, a large amount of dust is not generated, and the dam body is environment-friendly and practical.
2. In the construction method, the dam body comprises a plurality of dam body layers which are stacked and connected from bottom to top, each dam body layer comprises a plurality of steel plate units which are welded with each other, the dam body is formed by welding at a construction site, when welding is carried out, auxiliary fixing is carried out by utilizing a special flexible steel dam welding auxiliary tool or the auxiliary fixing is carried out by matching with a single buckle, when the steel plate units are stacked upwards, a good fixing effect can be achieved, when welding is carried out, the steel plate units are not required to be manually and always supported by hands, time and labor are saved, the steel plate units are prevented from shifting during welding, and the welding quality is ensured.
3. The flexible steel dam welding auxiliary tool comprises a main rod, a cross arm and a magnet, wherein a sleeve is movably sleeved on the main rod and can freely slide up and down and rotate; the sleeve is connected with a first fastening screw for fixing the sleeve; the outer wall of the sleeve is also connected with a connecting rod, the other end of the connecting rod is connected with a buckle, the buckle is in an inverted U shape, and the side wall of the buckle is connected with a second fastening screw for locking; the specific use method is as follows: when a second dam body layer is constructed, stacking a first steel plate unit in the dam body layer on the top of the first dam body layer and positioning, then holding the main rod by hand, adsorbing a magnet positioned above the first steel plate unit on the surface of the first steel plate unit, and adsorbing a magnet positioned below the first steel plate unit on the surface of the first dam body layer at a corresponding position; simultaneously, rotating the sleeve, adjusting the position of the sleeve up and down to enable the buckle to be clamped at the top of the first dam body layer, and screwing a first fastening screw to complete positioning and fixing of the sleeve; rotating the second fastening screw to tightly clamp the buckle on the top edge of the first dam body layer; and after the fixation is finished, welding. Flexible steel dam welding appurtenance simple structure, convenient operation, the installation and the dismantlement of being convenient for can play fine auxiliary fixture, prevent that the aversion from appearing in the welding process steel sheet unit, have guaranteed welding quality.
4. When the first steel plate unit is not fixed in the dam body layer, another independent buckle is adopted for auxiliary fixation; the buckle clamps and fixes the current steel plate unit and the adjacent steel plate unit together; the structure of the independent fastener is the same as that of the fastener in the flexible steel dam welding auxiliary tool, and the independent fastener and the fastener are provided with second fastening screws; when the flexible steel dam welding auxiliary tool is used, the independent buckles and the buckles in the flexible steel dam welding auxiliary tool are arranged in a diagonal line; therefore, the steel plate unit and the steel plate unit are matched for use, and the fixing effect of the steel plate unit is better.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a structural sectional view of a flexible steel dam in a top view direction.
Fig. 2 is a partial sectional view of a structure for welding and bolting the embedded steel plate and the dam body.
Fig. 3 is a left side view of the flexible steel dam.
Fig. 4 is a cross-sectional view taken along the line a-a (without the barrier layer).
Figure 5 is a cross-sectional view taken along the line a-a (with the barrier layer).
Fig. 6 is a schematic structural diagram of a flexible steel dam welding auxiliary tool.
FIG. 7 is a top partial cross-sectional view of the main rod and sleeve and the connecting rod.
Fig. 8 is a schematic structural diagram of the flexible steel dam welding auxiliary tool in a use state.
Fig. 9 is a schematic side view of the welding aid for the flexible steel dam of fig. 8 in use.
Description of the reference numerals:
1, a reservoir area; 2, a concrete base; 3, concrete dam abutment; 4, a dam body; 41 a first dam layer; 42 a second dam layer; 43 a third dam layer; 5, channel steel; 51 a barrier layer; 6 first welding seams; 7, pre-burying a steel plate; 8 second welding seams; 9 a first anchor bar; 10 overflow plates; 11 second anchor bars; 12, bolts; 13 a main rod; 14 a crossbar; 15 a magnet; 16 sleeves; 17 a first set screw; 18 connecting rods; 19, buckling; 20 second set screw.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Example one
As shown in fig. 1 to 9, the present embodiment provides a flexible steel dam, wherein the flexible steel dam includes a dam body 4, a concrete base 2, a concrete dam shoulder 3, and a channel steel 5, wherein the concrete base 2 is constructed along the width direction of a reservoir area 1; a channel steel 5 is arranged in the concrete base 2, the channel steel 5 can be a straight channel steel 5 or an arc channel steel 5, and the arc channel steel 5 is preferably selected in the embodiment; thus, the concrete base 2 is constructed into an arc shape; the bottom of the dam body 4 is connected in a notch of the channel steel 5, and a welding fixing mode is adopted; the dam body 4 comprises a plurality of dam body layers which are mutually stacked and connected from bottom to top, each dam body layer comprises a plurality of steel plate units which are mutually welded, the dam body layers are connected into a whole in a welding mode, and the steel plate units in the dam body 4 are welded in a staggered joint mode; two sides of the dam body 4 are connected with the concrete dam abutment 3, the concrete dam abutment 3 is constructed at the bank side of the river, the bottom of the concrete dam abutment 3 is connected with the concrete base 2, and the dam body 4, the concrete base 2 and the concrete dam abutment 3 are connected together to form the flexible steel dam.
As can be seen from the above description, the dam body 4 is made of the steel plate, and the characteristics of high strength and good flexibility of the steel plate are fully utilized to enable the dam body 4 to have good stretchability; the steel plate units in the dam body 4 can be processed and manufactured in a factory and then transported to a construction site for welding and assembling, and the steel plate units occupy small area and are convenient to transport; the flexible steel dam comprises a dam body, a concrete base and a concrete dam abutment, and has the advantages of simple construction, short construction period, safe and reliable operation and convenience in later maintenance and management in the construction process; the dam body is convenient to disassemble and build, the disassembled dam body can be reused, the cost is saved, the dam body can be directly cut off during disassembly, a large amount of dust cannot be generated, and the dam body is environment-friendly and practical.
The embodiment provides a flexible steel dam construction method, which comprises the following steps:
step one, cutting, blanking and processing in a factory according to design requirements to finish manufacturing of the steel plate unit and the channel steel 5.
Step two, constructing a concrete base 2: according to construction requirements, cleaning a reservoir area 1 at a corresponding position, supporting a template in the reservoir area 1, pouring concrete to form a concrete base 2, and embedding channel steel 5 in pouring;
it should be noted that, before casting, a plurality of second anchor bars 11 are welded at the bottom of the channel steel 5, and the second anchor bars 11 are cast in the concrete base 2, so that the channel steel 5 and the concrete base 2 can be connected more stably.
Step three, constructing a first dam body layer 41 positioned at the bottommost part: placing the steel plate units in the notches of the channel steels 5 and welding to complete the welding and fixing of the first steel plate unit in the dam body layer and the channel steels 5; then, a second steel plate unit is placed close to the first steel plate unit and welded to complete the welding and fixing of the second steel plate unit in the dam body layer, and meanwhile, the second steel plate unit and the first steel plate unit are welded and connected into a whole; according to the principle, all the steel plate units in the dam body layer are welded completely;
it should be noted that, when constructing the first dam layer 41 at the bottommost portion, a way of manually holding the steel plate unit may be adopted during welding. The dam body 4 is tightly attached to the inner wall behind the notch and welded together; the bottom of the dam body 4 is also welded with the bottom wall of the notch; a double-sided welding seam is adopted between the dam body 4 and the channel steel 5, and the formed welding seam is a first welding seam. During the benefit that sets up like this, the inner wall that the utilization is located 5 backs of channel-section steel can play fine spacing fender and prop the effect, can bear the impact of rivers, and impact resistance is more excellent.
Step four, constructing other dam body layers to form a dam body 4; when a second dam body layer 42 is constructed, a first steel plate unit in the second dam body layer 42 is stacked on the top of the first dam body layer 41, auxiliary fixing is carried out through a special flexible steel dam welding auxiliary tool, and then the steel plate unit and the first dam body layer 41 are welded; then, a second steel plate unit is placed at the adjacent position and clings to the first steel plate unit of the layer, and auxiliary fixing is carried out by using a special flexible steel dam welding auxiliary tool again; then welding the second steel plate unit with the first layer of dam body layer 41 and welding the second steel plate unit of the layer with the first steel plate unit of the layer; repeating the process until all the steel plate units in the second dam body layer 42 are welded; according to the principle, the rest other dam body layers are constructed upwards until the dam body 4 is formed;
the auxiliary welding tool for the flexible steel dam comprises a main rod 13, wherein the upper end and the lower end of the main rod 13 are respectively connected with a cross arm 14; the main rod 13 and the cross arm 14 form a structure shaped like the Chinese character 'Contraband', and the end part of the cross arm 14 is connected with a magnet 15; the main rod 13 is movably sleeved with a sleeve 16, and the sleeve 16 is connected with a first fastening screw 17 for fixing the sleeve 16; the outer wall of the sleeve 16 is also connected with a connecting rod 18, the other end of the connecting rod 18 is connected with a buckle 19, the buckle 19 is in an inverted U shape, and the side wall of the buckle 19 is connected with a second fastening screw 20 for locking; the specific use method is as follows: when a second dam body layer 42 is constructed, stacking a first steel plate unit in the dam body layer on the top of the first dam body layer 41 and positioning, holding the main rod 13 by hand, adsorbing the magnet 15 positioned above the surface of the first steel plate unit, and adsorbing the magnet 15 positioned below the surface of the first dam body layer 41 at the corresponding position; simultaneously, rotating the sleeve 16, and adjusting the position of the sleeve 16 up and down to enable the buckle 19 to be clamped at the top of the first dam layer 41, screwing the first set screw 17, and completing the positioning and fixing of the sleeve 16; rotating the second set screw 20 to tightly clamp the buckle 19 on the top edge of the first dam layer 41; after the fixation is finished, welding; repeating the process until all other steel plate units in the second dam body layer 42 are welded, and when constructing the steel plate unit of the dam body layer at the tail end, only using the magnet 15 for adsorption and fixation without clamping by using the buckle 19, and rotating the sleeve 16 to a place out of the way; in this principle, the remaining third layer of dam body 43 and other dam bodies are built up until the dam 4 is formed.
It should be further noted that when the non-first steel plate unit in the dam body layer is fixed, another separate fastener 19 may be used for auxiliary fixation; the buckle 19 is used for clamping and fixing the current steel plate unit and the adjacent steel plate unit together; the structure of the independent fastener 19 is the same as that of the fastener 19 in the auxiliary welding tool for the flexible steel dam, and the independent fastener 19 and the fastener 19 are provided with second fastening screws 20; when using, buckle 19 among individual buckle 19 and the flexible steel dam welding appurtenance is diagonal setting, and the two uses in cooperation jointly like this, and the fixed effect of steel sheet unit is better.
Because the positions of the steel plate units are different, whether the flexible steel dam welding auxiliary tool is adopted or not can be determined according to actual conditions when a dam body layer is constructed, the tool can be used independently or used in cooperation with manpower or not, and the flexible steel dam welding auxiliary tool is determined according to actual installation space and construction conditions and can be adjusted flexibly.
Step five, welding and/or bolting pre-buried steel plates at two ends of the formed dam body 4 respectively; the embedded steel plate and the dam body 4 are connected together in a lap welding mode, a welding seam formed between the embedded steel plate and the dam body is a second welding seam, in the embodiment, a bolting and welding double-connection mode can be adopted, the bolts are utilized to play a role in reinforcing connection, and the tensile capacity of the dam body 4 can be further improved.
And sixthly, erecting templates around the embedded steel plates, wrapping the embedded steel plates by the templates, pouring concrete to form the concrete dam shouldering 3, and connecting the concrete dam shouldering 3, the dam body 4 and the concrete base 2 to form the flexible steel dam.
It should be noted that, in the sixth step, before the pouring, the surface of the embedded steel plate is welded with the first anchor bars, so that the tensile strength of the embedded steel plate can be improved.
The following further explains:
in the fourth step, after the dam body 4 is formed, the top of the dam body 4 can be welded with an overflow plate 10; the overflow plate 10 is turned over towards the water flow direction, and the top of the dam body 4 is used for passing water, so that the landscape effect of the artificial waterfall is formed, and the landscape design requirement is met. In addition, the overflow plate 10 can prevent the erosion and corrosion of water flow to the back surface of the dam body 4, and the service life is prolonged.
Example two
On the basis of the first embodiment, the method further comprises a seventh step of constructing the impermeable layer 51 in the notch of the channel steel 5, so that impermeable water can be better realized. The barrier layer 51 can be constructed by various barrier treatment methods in the prior art, such as filling concrete mortar in the groove of the channel 5 and coating waterproof paint to form the barrier layer 51, but other methods can also be adopted, and the method is not explained here.
The method further comprises the eighth step of coating an anti-corrosion layer on the surface of the dam body 4, wherein the anti-corrosion layer comprises an anti-rust primer and a finish paint, and the specific directions are as follows: firstly, carrying out rust removal treatment on the dam body 4; then adding an aluminum chromium-free passivator into the antirust primer, then coating the antirust primer on the surface of the dam body 4, and finally coating a layer of finish.
It can be seen from the above description that, in the construction method, the dam body 4 comprises a plurality of layers of dam body layers which are mutually stacked and connected from bottom to top, each layer of dam body layer comprises a plurality of steel plate units which are mutually welded, the dam body is formed by welding on the construction site, when welding is carried out, auxiliary fixing is carried out by using a special flexible steel dam welding auxiliary tool or the auxiliary fixing is carried out by matching with a single buckle 19, when the steel plate units are stacked upwards, a good fixing effect can be achieved, when welding is carried out, the steel plate units are not required to be manually and auxiliarily supported by hands all the time, time and labor are saved, the steel plate units are prevented from shifting during welding, and the welding quality is ensured.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A construction method of a flexible steel dam comprises a dam body, a concrete base, a concrete dam abutment and channel steel, and is characterized in that the channel steel is arranged in the concrete base, and the bottom of the dam body is connected in a notch of the channel steel; the dam body comprises a plurality of dam body layers which are mutually stacked and connected from bottom to top, and each dam body layer comprises a plurality of steel plate units which are mutually welded; the two side edges of the dam body are connected with the concrete dam shoulders, and the bottoms of the concrete dam shoulders are connected with the concrete bases to form the flexible steel dam; the method comprises the following steps:
cutting, blanking and processing in a factory according to design requirements to finish the manufacture of a steel plate unit and channel steel;
step two, constructing a concrete base: cleaning a reservoir area, supporting a template in the reservoir area, pouring concrete to form a concrete base, and embedding channel steel in pouring;
step three, constructing a first dam body layer positioned at the bottommost part: placing the steel plate units in the notches of the channel steels and welding to complete the welding and fixing of the first steel plate unit in the dam body layer and the channel steels; then, a second steel plate unit is placed close to the first steel plate unit and welded to complete the welding and fixing of the second steel plate unit in the dam body layer, and meanwhile, the second steel plate unit and the first steel plate unit are welded and connected into a whole; according to the principle, all the steel plate units in the dam body layer are welded completely;
the first dam body layer is tightly attached to the inner wall behind the notch and welded together; the bottom of the first dam body layer is also welded with the bottom wall of the notch; a double-sided welding seam form is adopted between the first dam body layer and the channel steel;
step four, constructing other dam body layers to form a dam body; when a second layer of dam body layer is constructed, stacking a first steel plate unit in the second layer of dam body layer on the top of the first layer of dam body layer, carrying out auxiliary fixing through a special flexible steel dam welding auxiliary tool, and then welding the steel plate unit with the first layer of dam body layer; then, a second steel plate unit is placed at the adjacent position and clings to the first steel plate unit of the layer, and auxiliary fixing is carried out by using a special flexible steel dam welding auxiliary tool again; then welding the second steel plate unit with the first dam body layer and welding the second steel plate unit with the first steel plate unit; repeating the process until all the steel plate units in the second dam body layer are welded completely; according to the principle, other residual dam body layers are built upwards until the dam body is formed;
the auxiliary welding tool for the flexible steel dam comprises a main rod, wherein the upper end and the lower end of the main rod are respectively connected with a cross arm; the end part of the cross arm is connected with a magnet; the main rod is movably sleeved with a sleeve, and the sleeve is connected with a first fastening screw for fixing the sleeve; the outer wall of the sleeve is also connected with a connecting rod, the other end of the connecting rod is connected with a buckle, the buckle is in an inverted U shape, and the side wall of the buckle is connected with a second fastening screw for locking; the specific application method is as follows: when a second dam body layer is constructed, stacking a first steel plate unit in the dam body layer on the top of the first dam body layer and positioning, then holding the main rod by hand, adsorbing the magnet above the main rod on the surface of the first steel plate unit, and adsorbing the magnet below the main rod on the surface of the first dam body layer at the corresponding position; simultaneously, rotating the sleeve, adjusting the position of the sleeve up and down to enable the buckle to be clamped at the top of the first layer of dam body layer, and screwing a first fastening screw to complete positioning and fixing of the sleeve; rotating the second fastening screw to tightly clamp the buckle on the top edge of the first dam body layer; after the fixation is finished, welding; repeating the process until all other steel plate units in the second dam body layer are welded, and when the steel plate unit at the tail end of the dam body layer is constructed, only the magnet is used for adsorption and fixation, and the clamping by using a buckle is not needed; according to the principle, the rest other dam body layers are constructed upwards until the dam body is formed;
when the first steel plate unit is not fixed in the dam body layer, another independent buckle is adopted for auxiliary fixation; the buckle clamps and fixes the current steel plate unit and the adjacent steel plate unit together; the structure of the independent fastener is the same as that of the fastener in the auxiliary welding tool for the flexible steel dam, and the independent fastener and the fastener are provided with second fastening screws; when the flexible steel dam welding auxiliary tool is used, the independent buckles and the buckles in the flexible steel dam welding auxiliary tool are arranged in a diagonal line;
step five, respectively welding and/or bolting pre-buried steel plates at two ends of the formed dam body;
step six, erecting templates around the embedded steel plates, wrapping the embedded steel plates by the templates, then pouring concrete to form the concrete dam abutment, and connecting the concrete dam abutment with the dam body and the concrete base to form the flexible steel dam;
and seventhly, constructing an impermeable layer in the notch of the channel steel to realize impermeable water stop.
2. The method as claimed in claim 1, wherein in the fourth step, after the dam body is formed, the overflow plate is welded to the top of the dam body.
3. The flexible steel dam construction method according to claim 1, wherein in the sixth step, a plurality of first anchor bars are welded on the surface of the embedded steel plate before pouring.
4. The method as claimed in claim 1, wherein in the second step, a plurality of second anchor bars are welded to the bottom of the channel steel before the channel steel is poured.
5. The construction method of the flexible steel dam as claimed in claim 1, further comprising a step eight of coating an anti-corrosion layer on the surface of the dam body, wherein the anti-corrosion layer comprises an anti-corrosion primer and a finish paint, and the specific orientation is as follows: firstly, carrying out rust removal treatment on a dam body; then adding an aluminum chromium-free passivator into the antirust primer, then coating the antirust primer on the surface of the dam body, and finally coating a layer of finish.
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| JP4644750B1 (en) * | 2010-04-23 | 2011-03-02 | 一 小金 | Welding jig and welding method using the same |
| CN101881016B (en) * | 2010-05-25 | 2011-07-06 | 华北水利水电学院 | Combined multi-arch type steel-structure dam |
| CN201943050U (en) * | 2011-03-16 | 2011-08-24 | 华北水利水电学院 | Toe board connection structure of sandwich steel board dam of steel structure |
| JP2013013931A (en) * | 2011-07-06 | 2013-01-24 | Kobe Steel Ltd | Magnetic steel sheet clamping apparatus and one-side welding equipment using the same |
| CN109629523A (en) * | 2018-12-20 | 2019-04-16 | 重庆大学 | A kind of steel plate and concrete composite panel earth and rockfill dam and its construction method |
| CN210756088U (en) * | 2019-10-14 | 2020-06-16 | 南昌市前湖实业公司 | Auxiliary welding fixing device |
| CN211256891U (en) * | 2019-11-13 | 2020-08-14 | 山东省水利科学研究院 | Flexible steel dam |
| CN111636360A (en) * | 2020-05-12 | 2020-09-08 | 东北石油大学 | Device for manufacturing roller compacted concrete arch dam vibration table model |
| CN112301963A (en) * | 2020-11-13 | 2021-02-02 | 福建路港（集团）有限公司 | Stainless steel panel concrete combined anti-seepage structure and construction method thereof |
| CN113134700A (en) * | 2021-04-22 | 2021-07-20 | 中船黄埔文冲船舶有限公司 | Flat-bulb steel welding auxiliary fixtures |
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2021
- 2021-07-29 CN CN202110862297.2A patent/CN113481945B/en active Active
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