A method for installing and fixing a buried waterstop used in dam construction

Abstract

The present invention discloses a method for installing and fixing a buried waterstop applied to dam construction, comprising the following steps: S01, after excavating a foundation pit, rolling and compacting the foundation pit soil to form a compacted layer; S02, planning the position of the dam body formwork on the compacted layer, and pouring concrete on the expansion joint between the two dam body formworks to form a cast layer; S03, building a steel cage and tie bars on the compacted layer to fix the dam body formwork. The method for installing and fixing a buried waterstop applied to dam construction provided by the present invention reduces subsidence by using the compacted layer and cast layer formed by compaction and casting, and preliminarily fixes the buried waterstop by forming a steel clamp by bending existing steel bars on site, so as to reduce the tilt of the buried waterstop and avoid unidirectional water infiltration. After filling with concrete, the buried waterstop is vibrated by knocking the fixing rope to replace the conventional wooden stick to exhaust air, which is convenient to operate and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of embedded waterstops, and in particular to a method for installing and fixing embedded waterstops used in dam construction. Background Art

[0002] The embedded waterstop is a rubber component installed in the concrete between the concrete expansion joints. It has the ability to stop water while bearing load deformation through the expansion and contraction ability of the rubber.

[0003] According to patent number CN109372133B, publication (announcement) date: 2020-08-25, a method for installing and positioning a centrally embedded rubber waterstop is disclosed, wherein: a rubber waterstop lower assembly formwork and a rubber waterstop upper assembly formwork are used, the rubber waterstop lower assembly formwork is docked with the lower part of the main keel, initially tightened and fixed, the centrally embedded rubber waterstop is placed on the rubber waterstop lower assembly formwork, the middle hollow circular ring of the centrally embedded rubber waterstop is placed flatly in the lower seat groove of the waterstop, the rubber waterstop upper assembly formwork is docked with the upper part of the main keel, initially tightened, and at the same time, the upper seat groove of the waterstop should cover the middle hollow circular ring of the centrally embedded rubber waterstop; then the formwork is reinforced as a whole, a casting mold is erected outside the steel skeleton, and concrete is poured. The present invention utilizes the expansion joint's own filling material in combination with a traditional template to fix the position of the embedded rubber waterstop, which can always ensure that the middle hollow ring of the embedded rubber waterstop coincides with the center line of the expansion joint.

[0004] In the existing technologies including the above-mentioned patents, the size and scale of the dam are large, and the sand and gravel on the river bottom are unevenly distributed, which can easily cause the waterstop to lose its water-stopping effect due to the deviation of the dam. In addition, the embedded waterstop lacks fixing parts when fixed in the dam. During pouring, the concrete on both sides of the embedded waterstop is uneven, which will cause the waterstop to shift, shortening the one-way infiltration path of water and affecting the water-stopping effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for installing and fixing a buried waterstop used in dam construction, aiming to solve the problem that the buried waterstop is easily displaced during installation.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a method for installing and fixing a buried waterstop applied to a dam construction, comprising the following steps:

[0007] S01. After the foundation pit is excavated, the soil in the foundation pit is compacted to form a compacted layer;

[0008] S02. Plan the position of the dam formwork on the compacted layer, and pour concrete at the expansion joint between the two dam formworks to form a pouring layer;

[0009] S03. Build a steel cage and tie bars on the compacted layer to fix the dam formwork;

[0010] S04. Bend the steel bars to form steel bar clamps, fix the steel bar clamps to the steel cage, and form fixed slots corresponding to the positions of the embedded waterstops;

[0011] S05. Install the embedded waterstop on the dam formwork and pour concrete. After pouring, tap the fixing rope inside the embedded waterstop to vibrate the concrete in contact with the embedded waterstop to remove bubbles and compact it.

[0012] S06, pulling the fixing rope to make the embedded waterstop arch upward for a predetermined time;

[0013] S07. Withdraw the fixing rope to allow the embedded waterstop to rebound to maintain the horizontal position of the embedded waterstop.

[0014] Preferably, the embedded waterstop includes an elastic hollow portion and an embedded portion symmetrically arranged along the elastic hollow portion, a movable column extending into the elastic hollow portion is arranged in the embedded portion, and the fixed rope is driven to move along the elastic hollow portion to vibrate the movable column.

[0015] Preferably, a plurality of gradient protrusions are provided in a linear array on the fixed rope, and sliding mortgage blocks for limiting the fixed rope are symmetrically provided on the casting layer, wherein one of the sliding mortgage blocks moves to drive the gradient protrusion to push against the movable column.

[0016] Preferably, the outer wall of the elastic hollow portion is provided with limiting grooves in a circumferential array, and the limiting grooves are assembled at the following two stations:

[0017] First station: the limiting groove deforms and rebounds to maintain the circular cross-section of the elastic hollow portion;

[0018] Second working station: the limiting groove is deformed and broken to expand the deformation range of the elastic hollow part.

[0019] Preferably, the inner wall of the elastic hollow portion is provided with folding grooves in a circumferential array, and a tensioning fixing belt is provided in the limiting groove. The tensioning fixing belt is torn as the limiting groove is deformed to open the folding groove.

[0020] Preferably, the movable column is slidably connected in the embedded portion, and magnetic heads are provided at opposite ends of the movable column, and the two folding grooves are driven to fold to drive the two movable columns to be magnetically connected.

[0021] Preferably, a steel mesh cover is provided on the steel bar clamp, and the embedded portion is fixed to the steel mesh cover.

[0022] Preferably, the fixed rope is symmetrically provided with curved guide grooves, the movable column is slidably connected in the curved guide grooves, and the movable column bends along the curved guide grooves so that the movable column swings and amplifies vibration.

[0023] Preferably, the steel mesh cover is provided with reverse arch grooves in a linear array, and the embedded portion is provided with a conical retention end, which is inserted into the reverse arch groove as the movable column bends.

[0024] Preferably, the curved guide groove includes a high position and a low position, and the high position is opened on the gradual protrusion.

[0025] In the above technical scheme, the present invention provides a method for installing and fixing an embedded waterstop used in dam construction, which has the following beneficial effects: reducing settlement by forming a compacted layer and a poured layer through compaction and pouring, and preliminarily fixing the embedded waterstop by bending existing steel bars on site to form a steel clamp to reduce the inclination of the embedded waterstop and avoid unidirectional water penetration. After filling with concrete, the embedded waterstop is vibrated by knocking the fixing rope to replace the conventional wooden stick for exhaust, which is convenient to operate and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1 An overall schematic diagram provided for an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of explosion of dam formwork and embedded waterstop provided in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0030] Figure 4 Schematic diagram of the explosion of the dam formwork, embedded waterstop and fixed rope provided in an embodiment of the present invention;

[0031] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0032] Figure 6 An overall cross-sectional schematic diagram provided for an embodiment of the present invention;

[0033] Figure 7 for Figure 6 Enlarged schematic diagram at point C in the middle;

[0034] Figure 8 A schematic cross-sectional view of the fixing rope and embedded waterstop provided in an embodiment of the present invention.

[0035] Figure 9 for Figure 8 Enlarged schematic diagram at point D in the middle.

[0036] Description of reference numerals:

[0037] 1. Dam formwork; 10. Card slot; 11. Pull rod; 12. Steel bar clamp; 13. Steel mesh cover; 131. Inverted arch groove; 132. Sleeve; 2. Embedded waterstop; 21. Embedded part; 22. Elastic hollow part; 221. Folding groove; 222. Restriction groove; 223. Tensioning fixing belt; 23. Conical retention end; 24. Moving column; 241. Magnetic head; 3. Casting base; 31. Compacted layer; 32. Casting layer; 321. Restriction column; 33. Sliding base; 331. Screw; 332. Sliding mortgage block; 41. Fixing rope; 42. Gradual protrusion; 43. Bending guide groove. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0039] like Figure 1-9 As shown, a method for installing and fixing a buried waterstop used in dam construction includes the following steps:

[0040] Preset information: The length of the dam is 60m, the water storage height is 2.5m, the total concrete pouring volume is 14850m3, and the embedded waterstop 2 is a Class B neoprene rubber waterstop.

[0041] S01. After the foundation pit is excavated, since there are many sand and pebbles at the bottom of the riverbed and they are unevenly distributed, crushed sand is laid or directly rolled according to the on-site conditions to compact the foundation pit soil to form a compacted layer 31 to prevent the settlement caused by the uneven distribution of sand and pebbles, which may cause tearing and damage to the embedded waterstop 2;

[0042] S02. Plan the position of the dam body formwork 1 on the compacted layer 31, and pour concrete at the expansion joint between the two dam body formworks 1 to form a pouring layer 32. Use C30F200W6 antifreeze and anti-seepage concrete. The pouring layer 32 corresponds to both sides of the expansion joint to ensure that the pouring layer 32 is evenly located on the compacted layer 31. The pouring layer 32 and the compacted layer 31 form a pouring base 3.

[0043] S03, build a steel cage and tie rods 11 on the compacted layer 31 to fix the dam body template 1. The dam body template 1 is provided with tie screws, and the tie screws and tie rods 11 are welded for reinforcement. The size parameters of the steel cage are

[0044] S04, bend the steel bars to form steel bar clamps 12. The steel bar clamps 12 and the steel bar cage use the same steel bars. Fix the steel bar clamps 12 to the upper layer of the steel bar cage and the side edge steel bars for tying. The tying is fixed with steel wire or fasteners to form a fixed groove corresponding to the position of the embedded water stop 2.

[0045] S05, installing the embedded waterstop 2 on the dam body formwork 1 and pouring concrete, after pouring, knocking the fixing rope 41 inside the embedded waterstop 2 to vibrate the concrete attached to the embedded waterstop 2 to remove bubbles and compact it;

[0046] S06, pulling the fixing rope 41 to make the embedded waterstop 2 arch back, and keep it for a predetermined time (the initial setting time of concrete is 40 minutes to 60 minutes);

[0047] S07. Remove the fixing rope 41 to allow the embedded waterstop 2 to rebound, so as to maintain the horizontal position of the embedded waterstop 2.

[0048] In the above technical solution, the compacted layer 31 and the poured layer 32 formed by compaction and pouring are used to reduce settlement, and the embedded waterstop 2 is initially fixed by bending the existing steel bars on site to form a steel clamp 12 to reduce the inclination of the embedded waterstop 2 and avoid unidirectional water penetration. After filling with concrete, the embedded waterstop 2 is vibrated by knocking the fixing rope 41 to replace the conventional wooden stick for exhaust, which is convenient to operate and fast.

[0049] As an embodiment provided by the present invention, the embedded waterstop 2 includes an elastic hollow portion 22 and an embedded portion 21 symmetrically arranged along the elastic hollow portion 22. A movable column 24 extending into the elastic hollow portion 22 is arranged in the embedded portion 21, and the fixed rope 41 is driven to move along the elastic hollow portion 22 to vibrate the movable column 24.

[0050] Specifically, the fixing rope 41 is made of multiple steel cables wrapped together and has certain bending and supporting capabilities. A clip groove 10 is reserved on the dam body template 1 for the embedded part 21 to be clipped into the fixed clip groove surrounded by the steel clamp 12 along the clip groove 10. Before installing the embedded waterstop 2, the fixing rope 41 is first passed through the elastic hollow part 22, and then concrete is poured into the dam body template 1. The pouring volume of the dam body template 1 is large, and the overall pouring time is long. After the embedded waterstop 2 is installed, the fixing rope 41 is intermittently knocked (the intermittent time is 3s to 5s) during the pouring process to vibrate the moving column 24. During vibration, the air flow in the concrete that the embedded waterstop 2 is in contact with will float up and be discharged to compact the concrete and reduce the chance of leakage. Compared with conventional wooden sticks, it will not be affected by the additional steel clamp 12 and can vibrate the entire embedded waterstop 2 at the same time.

[0051] A pit is dug in the ground, which is then rolled and compacted to form a compacted layer 31, and poured according to the position to form a pouring layer 32. The dam body formwork 1 is then built, and the embedded part 21 is then inserted into the fixed groove formed by the steel bar clamp 12 along the tape groove 10. During the process of pouring concrete on the dam body formwork 1, the fixed rope 41 is struck intermittently to push the moving column 24 through the moving fixed rope 41 to generate vibration to expel bubbles.

[0052] As the optimal embodiment provided by the present invention, a plurality of gradient protrusions 42 are arranged in a linear array on the fixed rope 41, and sliding mortgage blocks 332 for restricting the fixed rope 41 are symmetrically arranged on the casting layer 32, wherein one of the sliding mortgage blocks 332 moves to drive the gradient protrusion 42 to push against the movable column 24.

[0053] Specifically, limiting columns 321 are provided at both ends of the casting layer 32, and a sliding base 33 is slidably connected to the limiting column 321, and a sliding mortgage block 332 is slidably connected to the sliding base 33. A screw 331 is threadedly connected to the sliding base 33, and the screw 331 is used to lock the sliding mortgage block 332 to limit the two ends of the fixed rope 41 through the two sliding mortgage blocks 332. When it is necessary to drive the fixed rope 41 to vibrate, the screw 331 is rotated to unlock the sliding mortgage block 332, and then the sliding mortgage block 332 is hit with a sledgehammer to push the moving column 24 through the moving gradual protrusion 42, and then the fixed rope 41 rebounds quickly, and the moving column 24 rebounds accordingly, so that the moving column 24 drives the embedded part 21 to vibrate.

[0054] A pit is dug in the ground, and then it is rolled and compacted to form a compacted layer 31, and poured according to the position to form a pouring layer 32, and the dam body formwork 1 is built, and then the embedded part 21 is clamped into the fixed groove surrounded by the steel bar clamp 12 along the tape groove 10, and then the sliding base 33 is installed on the limiting column 321, and the screw 331 is rotated to lock the sliding mortgage block 332. During the process of pouring concrete on the dam body formwork 1, the sliding mortgage block 332 is intermittently struck with a sledgehammer to push the moving column 24 through the gradual protrusion 42 to generate vibration to expel bubbles.

[0055] As an embodiment provided by the present invention, the outer wall of the elastic hollow portion 22 is provided with limiting grooves 222 in a circumferential array. The limiting grooves 222 are assembled at the following two stations:

[0056] First station: the limiting groove 222 deforms and rebounds to maintain the circular cross-section of the elastic hollow portion 22;

[0057] Second working station: the limiting groove 222 is deformed and broken to expand the deformation range of the elastic hollow portion 22 .

[0058] Specifically, the deformation distance of the water retaining dam corresponding to the first work station does not exceed the bearing limit of the embedded waterstop 2. At this time, the limiting groove 222 will only deform. Under the influence of water stress or temperature difference, the limiting groove 222 will try to maintain the circular cross-section of the elastic hollow part 22. When the water retaining dam is under more intense water flow or large temperature difference, there is a large expansion or settlement, and the limiting groove 222 breaks and loses its limiting effect, so as to expand the deformation range of the elastic hollow part 22 and avoid the elastic hollow part 22 from being torn or broken and affecting the water-stopping ability.

[0059] A pit is dug in the ground, and then it is rolled and compacted to form a compacted layer 31, and poured according to the position to form a pouring layer 32, and the dam body formwork 1 is built, and then the embedded part 21 is clamped into the fixed groove surrounded by the steel bar clamp 12 along the tape groove 10, and then the sliding base 33 is installed on the limiting column 321, and the screw 331 is rotated to lock the sliding mortgage block 332. During the process of pouring concrete on the dam body formwork 1, the sliding mortgage block 332 is hit intermittently with a sledgehammer to push the moving column 24 through the gradual protrusion 42 to generate vibration to discharge bubbles. When there is no large deformation between the water retaining dam, the elastic hollow part 22 deforms normally to adapt to the deformed expansion joint and stop water at the same time. When subsidence or large deformation occurs between the water retaining dam, the limiting groove 222 deforms and breaks, so that the cross-section of the elastic hollow part 22 is deformed, and has a larger deformation range.

[0060] As the optimal embodiment provided by the present invention, the inner wall of the elastic hollow part 22 is provided with folding grooves 221 in a circumferential array, and a tensioning fixing belt 223 is provided in the limiting groove 222. The tensioning fixing belt 223 is deformed and torn as the limiting groove 222 is deformed to open the folding groove 221.

[0061] Specifically, the tensioning fixing belt 223 is restricted when the limiting groove 222 is in the first position, and breaks and loses its limiting ability when the limiting groove 222 is in the second position. At this time, the movable range of the limiting groove 222 increases, which will pull the folding groove 221 to expand, so that the elastic hollow part 22 has a larger deformation range to adapt to the subsidence or larger deformation between the water dam.

[0062] The ground is dug into a pit, and then rolled and compacted to form a compacted layer 31, and poured according to the position to form a pouring layer 32, and the dam body formwork 1 is built, and then the embedded part 21 is clamped into the fixed clamping groove surrounded by the steel bar clamp 12 along the clamping groove 10, and then the sliding base 33 is installed on the limiting column 321, and the screw 331 is rotated to lock the sliding mortgage block 332. During the process of pouring concrete on the dam body formwork 1, the sliding mortgage block 332 is hit intermittently with a sledgehammer to push the moving column 24 through the gradual protrusion 42 to generate vibration to expel bubbles. When there is no large deformation between the water retaining dams, the elastic hollow part 22 deforms normally to adapt to the deformation of the expansion joint and stop water at the same time. However, when sinking or large deformation occurs between the water retaining dams, the tensioning fixing belt 223 in the limiting groove 222 is deformed and broken. At this time, the range of movement of the limiting groove 222 increases, which will pull the folding groove 221 to expand, so that the cross-section of the elastic hollow part 22 is deformed, and it has a larger deformation range.

[0063] As the optimal embodiment provided by the present invention, the movable column 24 is slidably connected in the embedded portion 21, and magnetic heads 241 are provided at the opposite ends of the movable column 24. The two folding grooves 221 are driven to fold to drive the two movable columns 24 to be magnetically connected.

[0064] Specifically, a sliding channel movable column 24 is provided in the embedded portion 21 and is slidably connected in the sliding channel. After the tensioning fixing belt 223 breaks, as the expansion joint of the water retaining dam deforms, the folding groove 221 and the limiting groove 222 will both stretch and shrink. During stretching, the folding groove 221 will fit the movable column 24 as it deforms, and drive the two movable columns 24 to move toward each other as it shrinks, so that the two magnetic heads 241 are magnetically connected. At this time, the deformation of the expansion joint is guided by the two movable columns 24 that fit each other, so that the stretching and shrinkage can change along the movable column 24. The regular stretching path can slow down the aging rate of the rubber embedded waterstop 2 and increase its service life.

[0065] The ground is dug into a pit, and then rolled and compacted to form a compacted layer 31, and poured according to the position to form a pouring layer 32, and the dam body formwork 1 is built, and then the embedded part 21 is clamped into the fixed clamping groove surrounded by the steel bar clamp 12 along the clamping groove 10, and then the sliding base 33 is installed on the limiting column 321, and the screw 331 is rotated to lock the sliding mortgage block 332. During the process of pouring concrete on the dam body formwork 1, the sliding mortgage block 332 is hit intermittently with a sledgehammer to push the moving column 24 through the gradual protrusion 42 to generate vibration to expel bubbles. When there is no large deformation between the water retaining dams, the elastic hollow part 22 deforms normally to adapt to the deformation of the expansion joint and stop water at the same time. However, when sinking or large deformation occurs between the water retaining dams, the tensioning fixing belt 223 in the limiting groove 222 is deformed and broken. At this time, the range of movement of the limiting groove 222 increases, which will pull the folding groove 221 to expand, so that the cross-section of the elastic hollow part 22 is deformed, and it has a larger deformation range.

[0066] As an embodiment provided by the present invention, a steel mesh cover 13 is provided on the steel bar clamp 12 , and the embedded portion 21 is fixed to the steel mesh cover 13 .

[0067] Specifically, a steel mesh cover 13 is provided on the steel bar clamp 12, and a sleeve 132 is provided on the steel mesh cover 13. The sleeve 132 is provided on the steel bar clamp 12, and the steel mesh cover 13 covers the fixed slot to prevent the vertical ribs or other parts in the embedded part 21 from fitting the steel bar clamp 12 when the concrete solidifies. When the expansion joint is deformed, it can prevent the embedded water stop 2 from being deformed along the steel bar clamp 12 and being pulled and damaged, and can also prevent the embedded part 21 from sinking into the spacing between the steel bar clamps 12.

[0068] A pit is dug on the ground, and then rolled and compacted to form a compacted layer 31, and poured according to the position to form a pouring layer 32, and the dam body template 1 is built, and the steel mesh cover 13 is laid on the steel clamp 12, and then the embedded part 21 is inserted into the fixed slot surrounded by the steel mesh cover 13 along the cassette groove 10, and then the sliding base 33 is installed on the limiting column 321, and the screw 331 is rotated to lock the sliding mortgage block 332. During the process of pouring concrete on the dam body template 1, the sliding mortgage block 332 is hit intermittently by a sledgehammer. The pressing block 332 pushes the movable column 24 through the gradual protrusion 42 to generate vibration to discharge bubbles. When there is no large deformation between the water retaining dams, the elastic hollow part 22 deforms normally to adapt to the deformed expansion joint and stop water at the same time. When sinking or large deformation occurs between the water retaining dams, the tensioning fixing belt 223 in the limiting groove 222 is deformed and broken. At this time, the range of movement of the limiting groove 222 increases, which will pull the folding groove 221 to expand, so that the cross-section of the elastic hollow part 22 is deformed and has a larger deformation range.

[0069] As the optimal embodiment provided by the present invention, a curved guide groove 43 is symmetrically opened on the fixing rope 41, and the movable column 24 is slidably connected in the curved guide groove 43. The movable column 24 bends along the curved guide groove 43 to make the movable column 24 swing and expand the vibration.

[0070] Specifically, a steel layer is provided on the curved guide groove 43, and the magnetic head 241 can be magnetically adsorbed in the steel layer to maintain that the magnetic head 241 can move along the movement of the curved guide groove 43 when the fixed rope 41 moves. The curved guide groove 43 is also opened on the gradual protrusion 42, which can cooperate with the movement of the fixed rope 41 to drive the swing amplitude of the movable column 24 to increase, thereby increasing the exhaust capacity.

[0071] A pit is dug on the ground, and then rolled and compacted to form a compacted layer 31, and poured according to the position to form a pouring layer 32, and the dam body template 1 is built, and a steel mesh cover 13 is laid on the steel clamp 12, and then the embedded part 21 is inserted into the fixed slot surrounded by the steel mesh cover 13 along the cassette groove 10, and then the sliding base 33 is installed on the limiting column 321, and the screw 331 is rotated to lock the sliding mortgage block 332. During the process of pouring concrete on the dam body template 1, the sliding mortgage block 332 is hit intermittently with a sledgehammer to push the moving column 24 through the gradual protrusion 42 to produce Vibration is used to expel bubbles, and at the same time, the moving column 24 moves along the curved guide groove 43 on the gradual protrusion 42 and the fixing rope 41 to increase the swing amplitude and accelerate the discharge of bubbles. When there is no large deformation between the water retaining dams, the elastic hollow part 22 deforms normally to adapt to the deformed expansion joint and stop water at the same time. When subsidence or large deformation occurs between the water retaining dams, the tensioning fixing belt 223 in the limiting groove 222 is deformed and broken. At this time, the range of movement of the limiting groove 222 increases, which will pull the folding groove 221 to expand, so that the cross-section of the elastic hollow part 22 is deformed and has a larger deformation range.

[0072] As the best embodiment provided by the present invention, the steel mesh cover 13 is provided with an inverted arch groove 131 in a linear array, and the embedded portion 21 is provided with a conical retention end 23, which is bent along with the movable column 24 and is inserted into the inverted arch groove 131;

[0073] The curved guide groove 43 includes a high position and a low position, and the high position is opened on the gradual protrusion 42 .

[0074] Specifically, the curved guide groove 43 includes a high position and a low position (with Figure 8For reference, the high position is the upper end and the low position is the lower end). After the concrete is poured in the dam body template 1, push the sliding mortgage block 332 to move so that the low position on the gradual protrusion 42 corresponds to the direction of the moving column 24. At this time, the moving column 24 will tilt to the low position due to the high position and the gradual protrusion 42, so that the conical retention end 23 is stuck in the anti-arch groove 131 along the steel mesh cover 13, so that the elastic hollow part 22 is higher than the embedded part 21, and then wait for a predetermined time (the concrete is separated from the initial setting time 40min). ~60min), then withdraw the sliding mortgage block 332 and the sliding base 33 to remove the restriction on the fixing rope 41, and pull the fixing rope 41 out of the elastic hollow part 22, and then with the deadweight of the elastic hollow part 22 falling and the overall rebound of the embedded waterstop 2, the embedded waterstop 2 maintains a straight state in the gradually solidifying concrete, and will not bend when the concrete solidifies due to the falling of the elastic hollow part 22, so as to maintain the original deformation limit of the embedded waterstop 2.

[0075] The embedded waterstop 2 is in an inverted arch, that is, the movable column 24 will tilt toward the low position due to the high position and the gradual protrusion 42, so that the conical retention end 23 is stuck in the inverted arch groove 131 along the steel mesh cover 13.

[0076] Dig a hole in the ground, then roll and compact it to form a compacted layer 31, and pour it according to the position to form a pouring layer 32, and build the dam formwork 1, and lay the steel mesh cover 13 on the steel clamp 12, and then insert the embedded part 21 into the fixed groove surrounded by the steel mesh cover 13 along the cassette groove 10, and then install the sliding base 33 on the limiting column 321, rotate the screw 331 to lock the sliding mortgage block 332, and in the process of pouring concrete on the dam formwork 1, intermittently hit the sliding mortgage block with a sledgehammer. The block 332 pushes the moving column 24 with the gradual protrusion 42 to generate vibration to discharge bubbles. At the same time, the moving column 24 moves along the curved guide groove 43 on the gradual protrusion 42 and the fixed rope 41 to increase the swing amplitude and accelerate the discharge of bubbles. Then, it pushes the sliding mortgage block 332, so that the low position on the gradual protrusion 42 corresponds to the direction of the moving column 24, causing the embedded waterstop 2 to be reversed. Then, after locking the sliding mortgage block 332 for a predetermined time, the fixed rope 41 is withdrawn to complete the installation of the embedded waterstop 2. When there is no significant deformation between the water dams, the elastic hollow part 22 deforms normally to adapt to the deformation of the expansion joint and simultaneously stops water. However, if there is sinking or significant deformation between the water dams, the tensioning fixing belt 223 in the limiting groove 222 is deformed and broken. At this time, the range of motion of the limiting groove 222 increases, which will pull the folding groove 221 to expand, so that the cross-section of the elastic hollow part 22 is deformed, with a larger deformation range.

[0077] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A method for installing and fixing a buried waterstop used in dam construction, characterized in that: The following steps are involved: S01, after the foundation pit is excavated, the foundation pit soil is compacted to form a compacted layer (31); S02, planning the position of the dam body formwork (1) on the compacted layer (31), and pouring concrete into the expansion joint between the two dam body formworks (1) to form a pouring layer (32); S03, constructing a steel cage and tie bars (11) on the compacted layer (31) to fix the dam formwork (1); S04, bending the steel bars to form steel bar clamps (12), the steel bar clamps (12) and the steel bar cage use the same steel bars, and fixing the steel bar clamps (12) to the upper layer of the steel bar cage and the side edge sealing steel bars by tying them to form a fixed groove corresponding to the position of the embedded water stop (2); S05, the embedded water stop (2) includes an elastic hollow part (22) and an embedded part (21) symmetrically arranged along the elastic hollow part (22), a clip groove (10) is reserved on the dam body template (1), so that the embedded part (21) is fixed along the clip groove (10) into the fixed clip groove surrounded by the steel bar clamp (12), and the fixing rope (41) is passed through the elastic hollow part (22), and concrete is poured. The fixing rope (41) is made of a plurality of steel cables. After pouring, the fixing rope (41) in the embedded water stop (2) is knocked to vibrate the concrete attached to the embedded water stop (2) to remove bubbles and compact it; S06, pulling the fixing rope (41) to cause the embedded water stop (2) to arch back, and continuing for a predetermined time; S07, withdraw the fixing rope (41), so that the embedded waterstop (2) rebounds to maintain the horizontal position of the embedded waterstop (2).

2. The method for installing and fixing a buried waterstop applied to dam construction according to claim 1 is characterized in that: A movable column (24) extending into the elastic hollow portion (22) is provided in the embedded portion (21), and the fixed rope (41) is driven to move along the elastic hollow portion (22) to vibrate the movable column (24).

3. The method for installing and fixing a buried waterstop applied to dam construction according to claim 2 is characterized in that: A plurality of gradually changing protrusions (42) are provided on the fixed rope (41) in a linear array, and sliding mortgage blocks (332) for restricting the fixed rope (41) are symmetrically provided on the casting layer (32), wherein one of the sliding mortgage blocks (332) moves to drive the gradually changing protrusions (42) to push against the movable column (24).

4. The method for installing and fixing a buried waterstop applied to dam construction according to claim 3 is characterized in that: The outer wall of the elastic hollow portion (22) is provided with limiting grooves (222) in a circumferential array, and the limiting grooves (222) are assembled at the following two stations: First station: the limiting groove (222) deforms and rebounds to maintain the circular cross-section of the elastic hollow portion (22); Second workstation: the limiting groove (222) is deformed and broken to expand the deformation range of the elastic hollow portion (22).

5. The method for installing and fixing a buried waterstop applied to dam construction according to claim 4 is characterized in that: The inner wall of the elastic hollow portion (22) is provided with folding grooves (221) in a circumferential array, and a tensioning fixing belt (223) is provided in the limiting groove (222). The tensioning fixing belt (223) is deformed and torn along with the limiting groove (222) to open the folding groove (221).

6. The method for installing and fixing a buried waterstop used in dam construction according to claim 5 is characterized in that: The movable column (24) is slidably connected in the embedded portion (21), and magnetic heads (241) are provided at opposite ends of the movable column (24). The two folding grooves (221) are driven to fold to drive the two movable columns (24) to be magnetically connected.

7. The method for installing and fixing a buried waterstop used in dam construction according to claim 6 is characterized in that: A steel mesh cover (13) is provided on the steel bar clamp (12), and the embedded portion (21) is fixedly attached to the steel mesh cover (13).

8. The method for installing and fixing a buried waterstop used in dam construction according to claim 7 is characterized in that: The fixing rope (41) is symmetrically provided with a curved guide groove (43), the movable column (24) is slidably connected in the curved guide groove (43), and the movable column (24) bends along the curved guide groove (43) so that the movable column (24) swings and expands vibration.

9. The method for installing and fixing a buried waterstop used in dam construction according to claim 8, characterized in that: The steel mesh cover (13) is provided with reverse arch grooves (131) in a linear array, and the embedded portion (21) is provided with a conical retention end (23). The conical retention end (23) is bent along with the movable column (24) and is inserted into the reverse arch groove (131).

10. The method for installing and fixing a buried waterstop used in dam construction according to claim 9, characterized in that: The curved guide groove (43) comprises a high position and a low position, and the high position is opened on the gradual protrusion (42).

Images