CN115162282A - Flexible steel dam construction method - Google Patents
Flexible steel dam construction method Download PDFInfo
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- CN115162282A CN115162282A CN202210975807.1A CN202210975807A CN115162282A CN 115162282 A CN115162282 A CN 115162282A CN 202210975807 A CN202210975807 A CN 202210975807A CN 115162282 A CN115162282 A CN 115162282A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 182
- 239000010959 steel Substances 0.000 title claims abstract description 182
- 238000010276 construction Methods 0.000 title claims abstract description 63
- 238000003466 welding Methods 0.000 claims abstract description 89
- 238000012545 processing Methods 0.000 claims abstract description 8
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/08—Wall dams
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Abstract
The invention belongs to the technical field of hydraulic engineering, and particularly relates to a flexible steel dam construction method, which comprises the following steps of S1: processing and manufacturing, and numbering in order; cutting, blanking and processing according to design requirements to finish the manufacture of the steel plate unit and the channel steel; numbering the steel plate units in each dam body layer in sequence; s2: constructing a concrete base; s3: constructing a dam body: welding and assembling the steel plate units in each dam body layer in sequence to form a plurality of dam body layers; the multiple dam body layers are subjected to auxiliary fixing and stacking welding to form the dam body; s4: constructing a concrete dam abutment; the concrete dam abutment is connected with the dam body and the concrete base to form the flexible steel dam. The construction method of the flexible steel dam is improved, so that the construction speed can be greatly improved on the whole, and as the welding of each dam body layer is carried out on the ground, the ground construction is more convenient and simpler compared with the original on-line high-altitude construction, and the welding construction speed of the dam body can be improved.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a flexible steel dam construction method.
Background
The technical problems in the construction process of the flexible steel dam, such as the problem of welding and fixing steel plates during dam face construction, the problem of effective connection between a dam body and a concrete base and a concrete dam shoulder and the like, need to be solved through research, the invention patent with the prior application of the applicant of the invention with the publication number of CN113481945B discloses a flexible steel dam construction method, when the dam body is welded, one steel plate unit is stacked and welded on site to form the dam body, which is similar to the construction method of building site wall building, but the construction speed of the method is not fast in practical application and needs to be improved. Therefore, the inventor intensively studies and proposes another flexible steel dam construction method, mainly aiming at improving the fixation of the steel plates in the dam body and improving the welding speed.
Disclosure of Invention
In order to solve the problems in the prior art, a flexible steel dam construction method is provided, and aims to improve the welding construction speed of a dam body and reduce the time used in the construction link, so that the overall construction period of the flexible steel dam is finally shortened.
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 shoulder 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, the bottom of each concrete dam shoulder is connected with the concrete base to form the flexible steel dam, and the construction method of the flexible steel dam is characterized by comprising the following steps:
s1: processing, making and numbering in order
Cutting, blanking and processing according to design requirements to finish the manufacture of the steel plate unit and the channel steel; numbering the steel plate units in each dam body layer in sequence;
s2: construction of concrete foundations
Cleaning a river channel, erecting a template in the river channel, pouring concrete to form a concrete base, and embedding channel steel in pouring;
s3: building dam body
S31, welding and assembling the steel plate units in each dam body layer in sequence to form a plurality of dam body layers: respectively arranging hoisting holes and positioning holes on the steel plate units positioned at the two ends in each dam body layer, wherein the hoisting holes are positioned above the positioning holes;
s32, placing the first dam body layer at the bottommost part in a notch of the channel steel, and welding and fixing the first dam body layer and the channel steel;
s33, hoisting Kong Diaoyun a second dam body layer to enable the second dam body layer to be stacked above the first dam body layer, fixing the second dam body layer in an auxiliary mode, and then welding the second dam body layer and the first dam body layer; repeating the process to complete the auxiliary fixing and stacking welding of the rest dam body layer to form the dam body;
s4: construction of concrete dam abutment
And respectively supporting and erecting templates at two ends of the dam body, pouring concrete to form the concrete dam abutment, and connecting the concrete dam abutment, the dam body and the concrete base to form the flexible steel dam.
Preferably, the specific method for sequentially welding and assembling the steel plate units in each dam body layer in S31 is as follows: the welding auxiliary tool comprises a bottom plate, one side of the bottom plate is connected with a positioning plate, the bottom plate is further connected with a support, at least two groups of fixing devices are hinged to the support, each fixing device comprises a hollow swing rod, each swing rod is connected with a telescopic rod in a sliding mode, the bottom end of each telescopic rod is inserted into the corresponding swing rod, a sliding block is connected in the corresponding swing rod in a sliding mode, and the bottom end of each telescopic rod is connected with the corresponding sliding block; a spring seat is fixedly connected to the inner wall of the swing rod, and a spring is connected between the spring seat and the sliding block; the top end of the telescopic rod is connected with a steel ball;
the specific operation method of the welding auxiliary tool comprises the following steps:
(1) according to the serial numbers, a first steel plate unit positioned at the head end in the first dam body layer is placed on the base, the steel plate unit is made to cling to the surface of the positioning plate, and the first group of fixing devices are rotated, so that steel balls in the first group of fixing devices are supported on the surface of the steel plate unit;
(2) placing the second steel plate units in sequence according to the serial numbers, enabling the second steel plate units to be attached to the surface of the positioning plate, and meanwhile ensuring that the second steel plate units are adjacent to the first steel plate units; then, rotating the second group of the fixers to enable the steel balls in the second group of the fixers to prop against the surface of the steel plate unit to complete the fixation of the second steel plate unit; then, welding the second steel plate unit and the first steel plate unit together; according to the principle, a third steel plate unit is orderly placed according to the serial number, the position of a second group of fixers is rotationally adjusted, so that steel balls in the second group of fixers are propped on the surface of the third steel plate unit, and then the third steel plate unit and the second steel plate unit are welded together; repeating the process, and welding to obtain a first dam body layer;
(3) taking down the first dam body layer from the welding auxiliary tool, and fully welding the double surfaces of all welding seams to obtain a first dam body layer finished product;
(4) and repeating the processes to obtain a second layer dam body layer finished product and a third layer dam body layer finished product … … Nth layer dam body layer finished product until all the dam body layer finished products are obtained by welding.
Preferably, the specific method for auxiliary fixing of the dam body layer in S33 is as follows: the auxiliary positioning tool is adopted for auxiliary fixing and comprises a main arm, two ends of the main arm are respectively connected with a threaded rod capable of penetrating through a hoisting hole and a positioning hole, and the main arm and the threaded rod form a U-shaped structure; the outer wall of the main arm is connected with an extrusion column I; the threaded rods are respectively sleeved with sleeves in a sliding connection mode, and extrusion columns II are connected among the sleeves; a clamping and positioning space is formed between the extrusion column II and the extrusion column I; a locking nut is connected to the threaded rod in a threaded manner;
the specific operation method of the auxiliary positioning tool comprises the following steps:
(1) after the dam body layer on the upper layer is hoisted to the position above the dam body layer on the lower layer, the main arm is held by a hand, and one of the threaded rods penetrates through the positioning hole of the dam body layer on the upper layer; penetrating the other threaded rod through a hoisting hole of the dam body layer on the lower layer;
(2) sleeving sleeves at two ends of the extrusion column II on the threaded rod;
(3) and (4) installing and screwing a locking nut, so that the extrusion column II and the extrusion column I clamp the upper dam body layer and the lower dam body layer, and the auxiliary fixation between the upper dam body layer and the lower dam body layer is completed.
Preferably, a plurality of anchoring ribs are welded on the outer wall of the extrusion column II.
Preferably, the outer wall of the main arm is connected with a handrail.
Preferably, the extrusion column I and the extrusion column II are both cylindrical or semi-cylindrical structures.
Preferably, after the dam body is formed in S33, anchoring ribs are bolted in the hoisting and/or positioning holes of the dam body.
Compared with the prior art, the invention has the beneficial effects that:
1. the construction method of the flexible steel dam is improved, the dam body is adjusted to a mode of welding the dam body layers first and then welding the dam body layers in a stacking mode from the original 'wall-building' welding method, the construction speed can be greatly improved on the whole, the welding of each dam body layer is carried out on the ground, compared with the original on-line high-altitude construction, the ground construction is more convenient and simple, the welding construction speed of the dam body can be improved, the time used in the construction link is reduced, and the whole construction period of the flexible steel dam is finally shortened.
2. The welding auxiliary tool is designed, and when the dam body layers are welded and assembled, the construction speed can be greatly improved by using the welding auxiliary tool; when the steel plate unit is used for welding auxiliary tools, the splicing speed is ensured, and the condition of wrong splicing is prevented; the auxiliary welding tool adopts a telescopic structure to match with the spring and the steel ball, so that positioning and fixing of each steel plate unit can be effectively realized during welding, manual support is not needed, and construction is facilitated; and the position of a fixer in the welding auxiliary tool can be adjusted through rotation, and the fixer is matched with a circular steel ball, so that the steel plate unit can be conveniently fixed at any position, and the limitation is small.
3. The auxiliary positioning tool is designed in the invention and is used for realizing the fixed positioning of the dam body layer positioned on the upper layer and the dam body layer positioned on the lower layer so as to avoid the subsequent dislocation problem and influence on welding; the auxiliary positioning tool is provided with two structural forms and two corresponding using methods, wherein one of the two structural forms only plays a role in auxiliary positioning and fixing and can be detached for recycling; secondly, not only play the assistance-localization real-time fixed action, still play the effect of drawknot anchor, under this kind of condition, need not to dismantle, directly pour in the concrete, whatever kind of structural style can all bring the optimization construction technology, improves construction speed's technological effect.
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 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A in fig. 1.
Fig. 3 isbase:Sub>A cross-sectional view of another embodiment taken along the linebase:Sub>A-base:Sub>A.
Fig. 4 is a front view of the flexible steel dam.
FIG. 5 is a schematic diagram of a dam body structure in the flexible steel dam.
Fig. 6 is a schematic structural diagram of the connection of the upper dam body layer and the lower dam body layer.
Fig. 7 is a plan view of the welding auxiliary tool.
Fig. 8 is a partial sectional view of a holder in the welding auxiliary tool.
Fig. 9 is a perspective view of the connection structure of the bottom plate and the positioning plate.
Fig. 10 is a schematic view of an embodiment of an auxiliary positioning tool structure.
Fig. 11 is a schematic structural view of the auxiliary positioning tool in a use state.
Fig. 12 is a schematic view of a second embodiment of an auxiliary positioning tool structure.
Fig. 13 is a block flow diagram of the method of the present invention.
Description of reference numerals:
1, river course; 2, a concrete base; 3, channel steel; 31 a barrier layer; 4, a dam body; 41 a dam layer; 411 hoisting holes; 412 positioning holes; 5, a dam abutment; 6, anchoring ribs; 7, stretching a rib; 8, a bottom plate; 9, positioning a plate; 10, a support; 11 oscillating bar; 12, telescoping a rod; 13, steel balls; 14 end caps; 15 sliding blocks; 16 springs; 17 a spring seat; 18 a main arm; 19 a threaded rod; 20 a handrail; 21 extruding the column I;22 a sleeve; 23 extruding a column II;24 lock the nut.
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. 1-6, the invention provides a flexible steel dam construction method, wherein the flexible steel dam comprises a dam body 4, a concrete base 2, a concrete dam shoulder 5 and channel steel 3, wherein the concrete base 2 is constructed along the width direction of a river channel 1; the concrete base 2 is internally provided with channel steel 3, the channel steel 3 can be straight channel steel 3 or arc channel steel 3, when the straight channel steel 3 is selected, the dam body 4 is correspondingly of a flat-plate structure, when the arc channel steel 3 is selected, the dam body 4 is also of an arc structure, and thus the concrete base 22 is also constructed into an arc shape; in this embodiment, an arc-shaped dam 4 is constructed as an example for explanation. The bottom of the dam body 4 is connected in a notch of the channel steel 3, and a welding fixing mode is adopted; the dam body 4 comprises a plurality of dam body layers 41 which are mutually stacked and connected from bottom to top, each dam body layer 41 comprises a plurality of steel plate units which are mutually welded, the dam body layers 41 are connected into a whole in a welding mode, and the steel plate units in the dam body 4 can be in a staggered seam welding mode; two sides of the dam body 4 are connected with the concrete dam abutment 5, the concrete dam abutment 5 is constructed at the bank, the bottom of the concrete dam abutment 5 is connected with the concrete base 2, and the dam body 4, the concrete base 2 and the concrete dam abutment 5 are connected together to form the flexible steel dam.
In addition, an overflow plate can be welded on the top of the dam body 4; the overflow plate is turned over along 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. Moreover, the overflow plate can prevent the water flow from scouring and corroding the back surface of the dam body 4, and the service life is prolonged.
Structurally, the dam body 4 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 4 has good stretchability; the flexible steel dam has the advantages of simple construction, short construction period, safe and reliable operation and convenient maintenance and management in the future in the construction process; the flexible steel dam is convenient to dismantle and build, the dam body 4 after being dismantled can be reused, the cost is saved, the dam body 4 can be directly cut off when being dismantled, a large amount of dust can not be generated, and the flexible steel dam is environment-friendly and practical.
In the patent previously applied by the inventor, a construction method is provided for constructing a flexible steel dam, when the dam body 4 is welded, steel plate units are overlapped and welded on site to form the dam body 4, which is similar to the construction method for building walls on a construction site, but the construction speed of the method is not fast in practical application and needs to be improved. Therefore, the inventor intensively studies and proposes another flexible steel dam construction method, mainly aiming at improving the fixation of the steel plates in the dam body 4 and improving the welding speed.
Referring to fig. 7 to 11 and 13, the method for constructing a flexible steel dam according to the present embodiment includes the following steps:
s1: processing, making and numbering in order
Cutting, blanking and processing according to design requirements to finish the manufacture of the steel plate unit and the channel steel 3; numbering the steel plate units in each dam body layer 41 in sequence; for example, the dam layers 41 are numbered in the sequence of 1,2,3,4 … … from bottom to top; the steel plate units in each layer of dam body layer 41 are arranged according to the proportion of 1-1,1-2,1-3 … …;2-1,2-2,2-3 … …; the sequence of 3-1,3-2,3-3 … … is numbered and labeled.
S2: construction of the concrete base 2
Cleaning a river channel 1, supporting a template in the river channel 1, pouring concrete to form a concrete base 2, and embedding channel steel 3 in the pouring process; and (4) after the concrete is solidified, removing the template.
It should be noted that, before pouring, a plurality of tie bars 7 are welded at the bottom of the channel steel 3, and the tie bars 7 are poured in the concrete base 2, so that the connection between the channel steel 3 and the concrete base 2 can be ensured to be more stable.
S3: constructing dams 4
S31, welding and assembling the steel plate units in each dam body layer 41 in sequence to form a plurality of dam body layers 41: because the steel plate units in each dam body layer 41 are marked with numbers, the steel plate units are sequentially spliced and welded through the numbers during assembly, so that the construction speed can be increased; respectively forming hoisting holes 411 and positioning holes 412 on the steel plate units at two ends in each dam body layer 41, wherein the hoisting holes 411 are positioned above the positioning holes 412; the hoisting hole 411 mainly plays a role in facilitating hoisting; the positioning holes 412 mainly serve to facilitate positioning and fixing, and the specific use method thereof is described in the following.
S32, placing the first dam body layer 41 positioned at the bottommost part in the notch of the channel steel 3, and welding and fixing the first dam body layer 41 and the channel steel 3;
it should be noted that, when constructing the first dam layer 41 at the bottommost portion, a manual walking manner 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; adopt the form of two-sided welding seam between dam body 4 and channel-section steel 3, during the benefit that sets up like this, the inner wall that the utilization is located 3 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.
In addition, in this step, as a preferable mode, a seepage-proof layer 31 can be further constructed in the notch of the channel steel 3, so that seepage-proof water can be better realized. The anti-seepage layer 31 can be constructed by various anti-seepage treatment methods in the prior art, such as filling concrete mortar in the groove of the channel 3 and coating waterproof paint to form the anti-seepage layer 31, but other methods can also be adopted, and the method is not explained one by one here.
S33, hoisting the second dam body layer 41 through the hoisting holes 411, enabling the second dam body layer 41 to be stacked above the first dam body layer 41, fixing the second dam body layer 41 in an auxiliary mode, and then welding the second dam body layer 41 and the first dam body layer 41; and repeating the process to complete the auxiliary fixing and stacking welding of the residual dam body layer 41 to form the dam body 4.
Due to the adoption of the stacking mode, after the second layer of dam body layer 41 is hoisted and placed above the first layer of dam body layer 41, due to the thickness of the steel plate unit, the supporting surface is small, and during welding, the second layer of dam body layer 41 is preferably subjected to temporary auxiliary fixing so as to avoid the subsequent dislocation problem and influence on welding; the remaining dam body layers 41 also have the problem in lifting and stacking, so except for the first dam body layer 41, each remaining dam body layer 41 needs to be temporarily fixed.
S4: construction of concrete dam 5
And (3) respectively supporting templates at two ends of the dam body 4, pouring concrete to form the concrete dam abutment 5, and connecting the concrete dam abutment 5, the dam body 4 and the concrete base 2 to form the flexible steel dam.
According to the invention, the construction method of the flexible steel dam is improved, the dam body 4 is adjusted to a mode of welding the dam body layers 41 firstly and then welding in a stacking manner from the original 'wall-building' welding method, so that the construction speed can be greatly improved on the whole, and as the welding of each dam body layer 41 is carried out on the ground, compared with the original on-line high-altitude construction, the ground construction is more convenient and simpler, the welding construction speed of the dam body 4 can be improved, the time used in the construction link is reduced, and the whole construction period of the flexible steel dam is finally shortened.
The method in the above steps is further elaborated below:
the concrete method for welding and assembling the steel plate units in each layer of dam body layer 41 in the step S31 in sequence respectively comprises the following steps: in order to improve the assembling and welding speed of each steel plate unit, auxiliary welding is carried out by adopting an auxiliary welding tool, and the specific structural form refers to the attached figures 7-9.
The welding auxiliary tool comprises a bottom plate 8, the bottom plate 8 is of an arc-shaped structure, one side of the bottom plate 8 is connected with a positioning plate 9, the positioning plate 9 is also of an arc-shaped structure, and the positioning plate 9 provides a splicing and shaping die for constructing the arc-shaped dam body layer 41; the bottom plate 8 is also connected with a support 10; at least two sets of fasteners are hinged to the support 10, and the fasteners can rotate around the hinged point.
The fixer comprises a hollow swing rod 11, one end of the swing rod 11 is rotatably connected to the support 10, the other end of the swing rod 11 is slidably connected with a telescopic rod 12, and the swing rod 11 and the telescopic rod 12 form a telescopic structure; the bottom end of the telescopic rod 12 is inserted into the swing rod 11, a sliding block 15 is connected in the swing rod 11 in a sliding mode, the sliding block 15 can slide along the inner wall of the swing rod 11, and the bottom end of the telescopic rod 12 is connected with the sliding block 15; a spring seat 17 is fixedly connected to the inner wall of the swing rod 11, and a spring 16 is connected between the spring seat 17 and the sliding block 15; the top end of the telescopic rod 12 is connected with a steel ball 13. The end of the swing rod 11 is connected with an end cap 14, the telescopic rod 12 freely penetrates through the end cap 14, and the telescopic rod 12 can freely slide relative to the end cap 14. When the steel plate unit welding fixture is used, the spring 16 plays a role in jacking, and jacking fixation of the steel plate unit can be achieved by utilizing the two groups of fixtures, so that subsequent welding is facilitated.
The specific operation method of the welding auxiliary tool comprises the following steps:
(1) according to the serial numbers, a first steel plate unit positioned at the head end in the first dam body layer 41 is placed on the bottom plate, the steel plate unit is made to be tightly attached to the surface of the positioning plate 9, and the first group of fixing devices are rotated, so that the steel balls 13 in the first group of fixing devices are supported on the surface of the steel plate unit; a space for clamping the steel plate unit is formed between the steel ball 13 and the positioning plate 9, so that the steel plate unit can stand above the bottom plate 8.
(2) After the first steel plate unit is fixed, the second steel plate units are sequentially placed according to the serial numbers, the second steel plate units are made to be tightly attached to the surface of the positioning plate 9, and meanwhile the second steel plate units are ensured to be tightly adjacent to the first steel plate units; then, rotating the second group of the fixers to enable the steel balls 13 in the second group of the fixers to prop against the surface of the steel plate unit to complete the fixing of the second steel plate unit; then, welding the second steel plate unit and the first steel plate unit together; according to the principle, a third steel plate unit is orderly placed according to the serial number, the position of a second group of fixers is rotationally adjusted, so that steel balls 13 in the second group of fixers prop against the surface of the third steel plate unit, and then the third steel plate unit and the second steel plate unit are welded together; repeating the process, and welding to obtain a first dam body layer 41;
in this step, each steel plate unit in the first dam body layer 41 may be welded and fixed by using a local spot welding method;
(3) taking down the first dam body layer 41 from the welding auxiliary tool, and performing double-sided full welding on all welding seams to obtain a finished product of the first dam body layer 41;
(4) and repeating the processes to obtain a second layer of dam body layer 41 finished product and a third layer of dam body layer 41 finished product … … Nth layer of dam body layer 41 finished product until all the dam body layer 41 finished products are obtained by welding.
By designing the welding auxiliary tool, the construction speed can be greatly improved by using the welding auxiliary tool when the individual dam body layer 41 is welded and assembled; when the steel plate unit is used for welding auxiliary tools, the splicing speed is ensured, and the condition of wrong splicing is prevented; the auxiliary welding tool adopts a telescopic structure to match with the spring 16 and the steel ball 13, so that positioning and fixing of each steel plate unit can be effectively realized during welding, manual support is not needed, and construction is facilitated; and the position of a fixer in the welding auxiliary tool can be adjusted through rotation, and the fixer can be conveniently fixed to a steel plate unit at any position by matching with the circular steel ball 13, so that the limitation is small.
The specific method for auxiliary fixing of the dam body layer 41 in the step S33 comprises the following steps: the auxiliary positioning tool is used for auxiliary fixing, the specific structure refers to the attached fig. 10-11, the auxiliary positioning tool comprises a main arm 18, two ends of the main arm 18 are respectively connected with a threaded rod 19 which can penetrate through a hoisting hole 411 and a positioning hole 412, and the main arm 18 and the threaded rod 19 form a U-shaped structure; the outer wall of the main arm 18 is connected with an extrusion column I21; the threaded rods 19 are respectively sleeved with sleeves 22 in a sliding connection mode, the sleeves 22 can be detached from the threaded rods 19, and the sleeves 22 can freely move along the threaded rods 19; an extrusion column II23 is connected between the sleeves 22; a clamping and positioning space is formed between the extrusion column II23 and the extrusion column I21 and is used for positioning and fixing the upper dam body layer 41; the threaded rod 19 is connected with a locking nut 24 in a threaded mode, the extrusion column II23 and the extrusion column I21 can be close to each other by screwing the locking nut 24, and therefore the extrusion column II23 is located on one side of the dam body layer 41, and the extrusion column I21 is located on the other side of the dam body layer 41.
For the convenience of holding, the outer wall of the main arm 18 is connected with a handrail 20.
The extrusion columns I21 and the extrusion columns II23 are both cylindrical or semi-cylindrical structures, and the dam body 4 is of an arc-shaped structure, so that the cylindrical or semi-cylindrical structures are more favorable for being attached to the inner side and the outer side of the dam body layer 41, and the upper layer and the lower layer of the dam body layer 41 can be aligned and fixed conveniently.
The specific operation method of the auxiliary positioning tool comprises the following steps:
(1) after the dam body layer 41 on the upper layer is hoisted to the position above the dam body layer 41 on the lower layer, the main arm 18 is held by a hand, and one of the threaded rods 19 penetrates through the positioning hole 412 of the dam body layer 41 on the upper layer; another threaded rod 19 penetrates through a hoisting hole 411 of the dam body layer 41 on the lower layer;
(2) sleeving sleeves 22 at two ends of an extrusion column II23 on the threaded rod 19;
(3) and installing and screwing the locking nut 24, so that the extrusion columns II23 and the extrusion columns I21 clamp the upper dam body layer 41 and the lower dam body layer 41, thereby completing the auxiliary fixation between the upper dam body layer 41 and the lower dam body layer 41.
(4) After the auxiliary fixing between the upper dam body layer 41 and the lower dam body layer 41 is completed, the hoisting device is removed, and the upper dam body layer 41 and the lower dam body layer 41 are welded and fixed; after the welding and fixing are completed, the auxiliary positioning tool is detached for the next use.
(5) The above process is repeated to complete the upward lap welding of the remaining dam layer 41.
When all the dam bodies 41 are welded together, the dam 4 described in S33 is formed, and the anchoring ribs 6 may be bolted or welded in the lifting holes 411 and/or the positioning holes 412 of the dam 4, so as to improve the tensile strength.
Example two
Referring to fig. 12, the present embodiment provides a method for constructing a flexible steel dam, and other structures and methods are the same as those of the embodiment, except that a plurality of anchoring ribs 6 are welded on the outer wall of the extrusion column II23, and the length of the threaded rod 19 is longer to form a rib-embedded structure.
In the specific operation method (4) of the auxiliary positioning tool in the first embodiment, after the welding and fixing are completed, the auxiliary positioning tool is detached for the next use; in the embodiment, the auxiliary positioning tool can be directly used for improving the bonding and anchoring effect with concrete by using the threaded rod 19 and the plurality of anchoring ribs 6 on the outer wall of the extrusion column II23 without being detached; therefore, although a plurality of sets of auxiliary positioning tools are integrally configured, the additional installation of the anchoring ribs 6 is not needed, the step of disassembling the auxiliary positioning tools is omitted, the link is saved, and the construction speed can be greatly improved.
It can be seen that the auxiliary positioning tool is designed in the invention, and is used for realizing the fixed positioning of the dam body layer 41 positioned on the upper layer and the dam body layer 41 positioned on the lower layer so as to avoid the subsequent dislocation problem and influence on welding; the auxiliary positioning tool is provided with two structural forms and two corresponding using methods, wherein one of the two structural forms only plays a role in auxiliary positioning and fixing and can be detached for recycling; secondly, not only play the assistance-localization real-time fixed action, still play the effect of drawknot anchor, under this kind of condition, need not to dismantle, directly pour in the concrete, whatever kind of structural style can all bring the optimization construction technology, improves construction speed's technological effect.
While embodiments of the 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 (7)
1. A flexible steel dam construction method is characterized in that the concrete base is internally provided with channel steel, 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, the bottom of each concrete dam shoulder is connected with the concrete base to form the flexible steel dam, and the construction method of the flexible steel dam is characterized by comprising the following steps:
s1: processing, making and numbering in order
Cutting, blanking and processing according to design requirements to finish the manufacture of steel plate units and channel steel; numbering the steel plate units in each dam body layer in sequence;
s2: construction of concrete foundation
Cleaning a river channel, erecting a template in the river channel, pouring concrete to form a concrete base, and embedding channel steel in pouring;
s3: constructing a dam body
S31, welding and assembling the steel plate units in each dam body layer in sequence to form a plurality of dam body layers: respectively arranging hoisting holes and positioning holes on the steel plate units positioned at the two ends in each dam body layer, wherein the hoisting holes are positioned above the positioning holes;
s32, placing the first dam body layer positioned at the bottommost part in a notch of the channel steel, and welding and fixing the first dam body layer and the channel steel;
s33, hoisting Kong Diaoyun a second dam body layer to enable the second dam body layer to be stacked above the first dam body layer, fixing the second dam body layer in an auxiliary mode, and then welding the second dam body layer and the first dam body layer; repeating the process to complete the auxiliary fixing and stacking welding of the rest dam body layer to form the dam body;
s4: construction of concrete dam abutment
And (3) respectively supporting templates at two ends of the dam body, pouring concrete to form the concrete dam abutment, and connecting the concrete dam abutment, the dam body and the concrete base to form the flexible steel dam.
2. The method for constructing the flexible steel dam according to claim 1, wherein the concrete method for sequentially welding and assembling the steel plate units in each dam body layer in the step S31 is as follows: the welding auxiliary tool comprises a bottom plate, one side of the bottom plate is connected with a positioning plate, the bottom plate is further connected with a support, at least two groups of fixing devices are hinged to the support, each fixing device comprises a hollow swing rod, each swing rod is connected with a telescopic rod in a sliding mode, the bottom end of each telescopic rod is inserted into the corresponding swing rod, a sliding block is connected in the corresponding swing rod in a sliding mode, and the bottom end of each telescopic rod is connected with the corresponding sliding block; a spring seat is fixedly connected to the inner wall of the oscillating rod, and a spring is connected between the spring seat and the sliding block; the top end of the telescopic rod is connected with a steel ball;
the specific operation method of the welding auxiliary tool comprises the following steps:
(1) according to the serial numbers, a first steel plate unit positioned at the head end in the first dam body layer is placed on the base, the steel plate unit is made to cling to the surface of the positioning plate, and the first group of fixing devices are rotated, so that steel balls in the first group of fixing devices are supported on the surface of the steel plate unit;
(2) sequentially placing the second steel plate units according to the serial numbers, enabling the second steel plate units to be tightly attached to the surface of the positioning plate, and simultaneously ensuring that the second steel plate units are tightly adjacent to the first steel plate units; then, rotating the second group of the fixers to enable the steel balls in the second group of the fixers to prop against the surface of the steel plate unit to complete the fixing of the second steel plate unit; then, welding the second steel plate unit and the first steel plate unit together; according to the principle, a third steel plate unit is orderly placed according to the serial number, the position of a second group of fixers is rotationally adjusted, so that steel balls in the second group of fixers are propped on the surface of the third steel plate unit, and then the third steel plate unit and the second steel plate unit are welded together; repeating the process, and welding to obtain a first dam body layer;
(3) taking down the first dam body layer from the welding auxiliary tool, and fully welding the double faces of all welding seams to obtain a first dam body layer finished product;
(4) and repeating the processes to obtain a second layer dam body layer finished product and a third layer dam body layer finished product … … Nth layer dam body layer finished product until all the dam body layer finished products are obtained by welding.
3. The flexible steel dam construction method according to claim 1, wherein the specific method for auxiliary fixing of the dam body layer in the S33 comprises the following steps: the auxiliary positioning tool is adopted for auxiliary fixing and comprises a main arm, two ends of the main arm are respectively connected with a threaded rod capable of penetrating through a hoisting hole and a positioning hole, and the main arm and the threaded rod form a U-shaped structure; the outer wall of the main arm is connected with an extrusion column I; the threaded rods are respectively sleeved with sleeves in a sliding connection mode, and extrusion columns II are connected among the sleeves; a clamping and positioning space is formed between the extrusion column II and the extrusion column I; the threaded rod is in threaded connection with a locking nut;
the specific operation method of the auxiliary positioning tool comprises the following steps:
(1) after the dam body layer on the upper layer is hoisted to the position above the dam body layer on the lower layer, the main arm is held by a hand, and one of the threaded rods penetrates through the positioning hole of the dam body layer on the upper layer; penetrating the other threaded rod through a hoisting hole of the lower dam body layer;
(2) sleeving sleeves at two ends of the extrusion column II on the threaded rod;
(3) and (4) installing and screwing a locking nut, so that the extrusion column II and the extrusion column I clamp the upper dam body layer and the lower dam body layer, and the auxiliary fixation between the upper dam body layer and the lower dam body layer is completed.
4. The method as claimed in claim 3, wherein a plurality of anchoring ribs are welded to the outer wall of the extrusion column II.
5. A method as claimed in claim 3, wherein a handrail is attached to an outer wall of the main arm.
6. The method as claimed in claim 3, wherein the extrusion columns I and II are cylindrical or semi-cylindrical structures.
7. The method for constructing the flexible steel dam as claimed in claim 1, wherein after the dam body is formed in S33, anchoring ribs are bolted into the hoisting and/or positioning holes of the dam body.
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| CN202210975807.1A CN115162282B (en) | 2022-08-15 | 2022-08-15 | Flexible steel dam construction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101619029B1 (en) * | 2015-11-25 | 2016-05-11 | 한국수자원공사 | RCC dam for formation of atypical curved surface and construction method of the same |
| CN206952450U (en) * | 2017-07-14 | 2018-02-02 | 北京善筑科技股份有限公司 | Weld positioning tool |
| CN113481945A (en) * | 2021-07-29 | 2021-10-08 | 山东省水利科学研究院 | Flexible steel dam construction method |
| CN216238370U (en) * | 2021-11-15 | 2022-04-08 | 安徽金川活动坝科技有限公司 | Movable dam with protection hydraulic supporting structure |
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2022
- 2022-08-15 CN CN202210975807.1A patent/CN115162282B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101619029B1 (en) * | 2015-11-25 | 2016-05-11 | 한국수자원공사 | RCC dam for formation of atypical curved surface and construction method of the same |
| CN206952450U (en) * | 2017-07-14 | 2018-02-02 | 北京善筑科技股份有限公司 | Weld positioning tool |
| CN113481945A (en) * | 2021-07-29 | 2021-10-08 | 山东省水利科学研究院 | Flexible steel dam construction method |
| CN216238370U (en) * | 2021-11-15 | 2022-04-08 | 安徽金川活动坝科技有限公司 | Movable dam with protection hydraulic supporting structure |
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| CN115162282B (en) | 2024-04-12 |
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