Fabricated reinforcing structure and method for improving anti-penetration explosion protection performance of dam

Abstract

The invention discloses an assembly type reinforcing structure and method for improving the anti-penetration explosion protection performance of a dam. The reinforcing structure comprises a bottom limiting structure, side limiting structures arranged on the two sides of the bottom limiting structure and a plurality of ultra-high-performance concrete precast blocks assembled in an area defined by the bottom limiting structure and the side limiting structures. The bottom limiting structures and the side limiting structures are fixedly connected with a dam body of the dam, and ultra-high-performance concrete is poured at abutted seams between the adjacent ultra-high-performance concrete precast blocks, between the ultra-high-performance concrete precast blocks and the side limiting structures and between the ultra-high-performance concrete precast blocks and the bottom limiting structures for connection. According to the fabricated reinforcing structure and method, the ultra-high performance concrete precast blocks are assembled in a sliding-in mode, and high-resistance rapid reinforcing of the dam can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dam protection, and in particular relates to an assembled reinforcement structure and method for improving the anti-penetration explosion protection performance of a dam. Background Art

[0002] As a key infrastructure, concrete gravity dams are closely related to important fields such as hydropower generation, water source regulation, agricultural irrigation, and shipping. If a concrete gravity dam is hit, it may cause serious disasters and secondary effects, causing a huge impact on the economy and people's livelihood.

[0003] Concrete gravity dams are mainly threatened by upstream underwater explosions and downstream ground-penetrating explosions. Among them, ground-penetrating bombs can cause serious damage to the dam by first penetrating the gravity dam body and then exploding in the dam body. Therefore, it is of great significance and value to reinforce the existing dams against penetration explosions and improve the protective performance of the dams.

[0004] The structural characteristics of a gravity dam determine that different parts of the dam have different vulnerabilities and impact ranges when facing potential damage. Specifically, the upper part of the dam is directly exposed to the natural environment and is affected by natural factors such as water erosion, weathering, and temperature changes, making it relatively easy to be damaged. However, since the upper structure is not the main area that bears water pressure, once damaged, it will only have limited impact on the downstream area.

[0005] In contrast, the bottom structure of the dam is deeply buried in the foundation, well supported and constrained by the surrounding rock and soil, and its design fully considers stability and durability, so it is not easily damaged by external impact. Even in extreme situations, the bottom structure can resist damage with its strong structural strength and stability, ensuring the overall safety of the dam.

[0006] However, the middle part of the dam body between the upper and lower parts may face more complex and serious consequences when it is hit. This area is neither as easy to repair as the upper part and has limited impact on the downstream, nor does it have strong self-protection capabilities like the bottom. Therefore, the protection of the middle part of the dam body is particularly important. Once the middle part is damaged, it may affect the overall stability of the dam, and then pose a greater threat to the downstream area.

[0007] In order to resist the penetration and explosion of bunker-buster bombs, new or existing dam structures need to be designed or reinforced with a layer, usually cast-in-place ordinary concrete. However, the protective performance of ordinary concrete structures is not high. Generally, the protective performance is improved by increasing the thickness of concrete, and the corresponding additional load applied to the dam structure will increase, which is bound to increase the burden on the original dam structure and foundation. In order not to excessively increase the burden on the target structure, concrete with higher strength and toughness or ultra-high performance concrete (UHPC) materials are needed to make the reinforcement layer thinner. For ultra-high performance concrete, the required maintenance conditions are higher, and it is still constructed by cast-in-place. The on-site mechanical properties are difficult to be effectively guaranteed, resulting in a large gap in the mechanical properties of on-site cast and standard curing specimens.

[0008] In summary, it is particularly important to protect the middle part of a gravity dam from damage when it is struck. Currently, there is a lack of fast and effective protection methods, and it is urgent to propose a high-resistance assembled dam reinforcement method that can be quickly constructed and has guaranteed quality to effectively resist various forms of attacks, including explosion attacks. Summary of the invention

[0009] In view of this, an object of the present invention is to provide an assembled reinforcement structure and method for improving the anti-penetration explosion protection performance of the dam, so as to achieve reliable and rapid reinforcement of the dam.

[0010] The present invention solves the above problems by the following technical means:

[0011] An assembled reinforcement structure for improving the anti-penetration explosion protection performance of a dam, comprising a bottom limiting structure, side limiting structures arranged on both sides of the bottom limiting structure, and a plurality of ultra-high performance concrete precast blocks assembled in the area enclosed by the bottom limiting structure and the side limiting structure, wherein the bottom limiting structure and the side limiting structure are both fixedly connected to the dam body, and the joints between adjacent ultra-high performance concrete precast blocks, between the ultra-high performance concrete precast blocks and the side limiting structures, and between the ultra-high performance concrete precast blocks and the bottom limiting structure are all poured with ultra-high performance concrete for connection. The strength of the ultra-high performance concrete (UHPC) is equal to or greater than 130MPa. Among them, 1m 3 UHPC material ratio: high-strength cement 530kg / m 3 , active powder 232kg / m 3 , sand 621kg / m 3 , stone 1020kg / m 3 , water 121kg / m 3 , water reducing agent 21kg / m 3 , steel fiber 10kg / m 3The stones in the UHPC material mix are aluminum oxide industrial waste with ultra-high strength and hardness, and the maximum particle size in the gradation must be at least 80 mm. The stones in the UHPC material mix are ordinary gravel or pebbles, and the particle size is controlled within 15 mm.

[0012] Furthermore, the prefabrication process of the ultra-high performance concrete prefabricated block comprises the following steps:

[0013] Mould erection: The mould cavity is constructed by the mould plate, the mould cavity is shaped by the mould plate fixing frame, and the mould release agent is applied on the inner surface of the mould cavity;

[0014] Arrange the connecting ribs: set reserved holes on the lateral template, place the connecting ribs in the reserved holes, and use rubber sealing plugs to seal the empty reserved holes and the inner holes of the connecting ribs;

[0015] Casting ultra-high performance concrete: casting ultra-high performance concrete precast blocks containing aluminum oxide aggregate and having a maximum particle size greater than 80 mm through the mold cavity;

[0016] De-moulding and curing: De-mould and cure the ultra-high performance concrete precast blocks after 1-2 days.

[0017] Furthermore, when two ultra-high performance concrete precast blocks are assembled, the connecting reinforcements on the assembly sides of the two ultra-high performance concrete precast blocks are staggered.

[0018] Furthermore, the connecting ribs on the same side of the ultra-high performance concrete prefabricated block are at the same height and arranged horizontally.

[0019] Furthermore, the bottom limiting structure includes a baffle, and the baffle is fixedly connected to the dam body via baffle fixing bolts.

[0020] Furthermore, the side limiting structure includes threaded connecting ribs spaced vertically and arranged in rows and baffles arranged outside the threaded connecting ribs, the threaded connecting ribs are anchored to the dam body, and the baffles are fixedly connected to the dam body via baffle fixing bolts.

[0021] Furthermore, baffle reinforcement ribs are provided on the baffle.

[0022] Furthermore, the side limiting structure includes an I-beam, which is assembled with the ultra-high performance concrete prefabricated block on the corresponding side, and the I-beam is fixedly connected to the dam body by an I-beam fixing bolt.

[0023] Furthermore, when the side limiting structure adopts an I-beam, a pad is pre-installed at the installation position of the ultra-high performance concrete prefabricated block. The pad is fixedly connected to the dam body by pad fixing bolts, and the thickness of the pad is consistent with the thickness of the bottom wing plate of the I-beam.

[0024] Furthermore, the side of the ultra-high performance concrete prefabricated block is provided with an overhanging eave that can be used for the wet joint concrete top sealing formwork.

[0025] A reinforcement method using the above reinforcement structure comprises the following steps:

[0026] S1: Install the bottom limiting structure and the side limiting structure;

[0027] S2: Slide the ultra-high performance concrete precast blocks in sequence between the side limiting structures until all the ultra-high performance concrete precast blocks are installed, and the bottom ultra-high performance concrete precast blocks are blocked by the bottom limiting structures;

[0028] S3: pouring ultra-high performance concrete at the joints between adjacent ultra-high performance concrete precast blocks, between the ultra-high performance concrete precast blocks and the side limiting structures, and between the ultra-high performance concrete precast blocks and the bottom limiting structures;

[0029] S4: Ultra-high performance concrete in curing joints.

[0030] Beneficial effects of the present invention:

[0031] The present invention manufactures ultra-high performance concrete prefabricated blocks, splices them on site and casts wet joints. Compared with the existing ultra-high performance concrete protective layer cast in large volume on site, the present invention has the advantages of fast construction speed and reliable material mechanical properties. At the same time, the comprehensive construction cost is equivalent to that of integral casting.

[0032] Compared with the existing assembly method of reserving wet joints and using grouting materials and other materials for post-casting, the present invention has pre-embedded connecting bars on each side of the ultra-high performance concrete prefabricated blocks involved in the connection, and the connecting bars of adjacent ultra-high performance concrete prefabricated blocks are arranged in a staggered manner, and concrete with a strength not less than that of the ultra-high performance concrete prefabricated blocks is poured in the joints, so that the bonding performance between the assembly blocks can be reliably guaranteed, and the strength of the assembled protective layer is equivalent to that of its overall cast-in-place protective layer.

[0033] In summary, the present invention ensures the efficient and reasonable connection between components with its simple design, streamlined components and uniform specifications. Through the slide-in assembly method, the installation process of the assembled protective structure becomes simple and quick, greatly improving work efficiency. By adopting high-strength and high-toughness ultra-high performance concrete, the resistance of the reinforcement layer is increased without excessively increasing the deadweight of the dam structure. The ultra-high performance concrete prefabricated blocks are prepared in a factory prefabricated manner, and the mechanical properties of the ultra-high performance concrete are more easily and effectively guaranteed. In view of these significant performance advantages and practicality, the present invention has broad application prospects in the field of dam strengthening and reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] Figure 1a This is a schematic diagram of the mold erection process for preparing the ultra-high performance concrete prefabricated blocks of Example 1 of the present application;

[0036] Figure 1b A schematic diagram of the arrangement of connecting bars in the process of preparing ultra-high performance concrete prefabricated blocks according to Example 1 of the present application;

[0037] Figure 1c A schematic diagram of pouring concrete for the preparation process of ultra-high performance concrete prefabricated blocks according to Example 1 of the present application;

[0038] Figure 1d This is a structural schematic diagram of an ultra-high performance concrete prefabricated block of Example 1 of the present application (connecting ribs are arranged on all four sides);

[0039] Figure 1e This is another structural schematic diagram of the ultra-high performance concrete prefabricated block of Example 1 of the present application (connecting ribs are arranged on two sides);

[0040] Figure 1f This is a schematic diagram of assembling the ultra-high performance concrete prefabricated blocks of Example 1 of the present application;

[0041] Figure 1g This is a schematic diagram of the installation of ultra-high performance concrete prefabricated blocks of the reinforcement structure of Example 1 of the present application;

[0042] Figure 1h A schematic diagram of pouring concrete at the joint of the reinforcement structure of Example 1 of the present application;

[0043] Figure 1i It is a partial schematic diagram of the joint of the reinforcement structure of Example 1 of the present application where concrete has not been poured;

[0044] Figure 1j A partial schematic diagram of a splicing joint of a reinforcement structure of Example 1 of the present application being poured with concrete;

[0045] Figure 1k This is a schematic diagram of the application of the reinforcement structure of Example 1 of the present application;

[0046] Figure 2a This is a schematic diagram of the installation of ultra-high performance concrete prefabricated blocks for the reinforcement structure of Example 2 of the present application;

[0047] Figure 2b A schematic diagram of pouring concrete at the joint of the reinforcement structure of Example 2 of the present application;

[0048] Figure 2c It is a partial schematic diagram of the joint of the reinforcement structure of Example 2 of the present application where concrete has not been poured;

[0049] Figure 2d A partial schematic diagram of a splicing joint of a reinforcement structure of Example 2 of the present application being poured with concrete;

[0050] Figure 2e This is a schematic diagram of the application of the reinforcement structure of Example 2 of the present application;

[0051] Figure 3a This is a schematic diagram of the installation of ultra-high performance concrete prefabricated blocks of the reinforcement structure of Example 3 of the present application;

[0052] Figure 3b A schematic diagram of pouring concrete at the joint of the reinforcement structure of Example 3 of the present application;

[0053] Figure 3c It is a partial schematic diagram of the joint of the reinforcement structure of Example 3 of the present application where concrete has not been poured;

[0054] Figure 3d A partial schematic diagram of a splicing joint of a reinforcement structure of Example 3 of the present application being poured with concrete;

[0055] Figure 3e This is a schematic diagram of the application of the reinforcement structure of Example 3 of the present application.

[0056] Numbers in the figure: 1-UHPC precast block; 101-UHPC precast block cantilever; 11-slurry hopper; 111-UHPC slurry;

[0057] 2-template; 21-template fixing frame; 22-reserved hole; 23-heightening frame; 24-reserved hole rubber sealing plug; 25-connecting rib built-in rubber sealing plug;

[0058] 3-connecting rib; 31-U-shaped connecting rib; 311-combination of U-shaped connecting rib and built-in rubber sealing plug;

[0059] 4-assembly joint; 41-first joint; 42-second joint; 43-threaded connecting bar; 44-wet joint concrete;

[0060] 5-I-beam; 51-I-beam fixing bolt; 52-backing plate; 53-backing plate fixing bolt;

[0061] 6- dam body;

[0062] 7- baffle; 71- baffle reinforcement rib; 72- baffle fixing bolt. DETAILED DESCRIPTION

[0063] The present invention will be described in detail below with reference to the accompanying drawings.

[0064] Example 1

[0065] like Figures 1a to 3eAs shown, this embodiment provides an assembled reinforcement structure for improving the anti-penetration explosion protection performance of the dam, including a bottom limiting structure, side limiting structures arranged on both sides of the bottom limiting structure, and a plurality of ultra-high performance concrete precast blocks assembled in the area enclosed by the bottom limiting structure and the side limiting structure, the bottom limiting structure and the side limiting structure are both fixedly connected to the dam body, and the joints between adjacent ultra-high performance concrete precast blocks, between the ultra-high performance concrete precast blocks and the side limiting structures, and between the ultra-high performance concrete precast blocks and the bottom limiting structure are all poured with ultra-high performance concrete for connection.

[0066] In this embodiment, the ultra-high performance concrete prefabricated block is a regular quadrilateral structure, and of course it can be other shapes. The upper part of the four sides of the ultra-high performance concrete prefabricated block is provided with an overhanging eave 101, which is used as the top formwork when pouring wet joint concrete. Figure 1d As shown, the sides of the ultra-high performance concrete prefabricated blocks are all provided with connecting ribs. Figure 1e As shown, connecting bars are arranged on two sides of the ultra-high performance concrete prefabricated block.

[0067] In this embodiment, the connecting ribs are U-shaped connecting ribs; the distances from the outermost ends of the exposed parts of the U-shaped connecting ribs 31 to the corresponding side faces of the ultra-high performance concrete precast blocks 1 are the same. The annular surfaces of the U-shaped connecting ribs 31 on each side are horizontal and parallel to each other, that is, the connecting ribs on the same side face of the ultra-high performance concrete precast blocks are at the same height and arranged horizontally. The U-shaped connecting ribs 31 on the opposite faces of the ultra-high performance concrete precast blocks 1 are arranged to give way. Specifically, when two ultra-high performance concrete precast blocks are assembled, the connecting ribs on the assembly sides of the two ultra-high performance concrete precast blocks are staggered, so that the U-shaped connecting ribs 31 on the opposite faces of the adjacent ultra-high performance concrete precast blocks 1 do not conflict with each other. When the two ultra-high performance concrete precast blocks 1 are butt-jointed and assembled, the U-shaped connecting ribs 31 on the two opposite faces are staggered in the vertical direction. The surface reinforcement ratio of the connecting ribs is designed according to the bonding strength of the wet joint concrete at the joint.

[0068] The prefabrication process of the ultra-high performance concrete prefabricated block comprises the following steps:

[0069] Model: Figure 1a As shown, a mold cavity is constructed by a template, the mold cavity is shaped by a template fixing frame, and a mold release agent is applied to the inner surface of the mold cavity;

[0070] Arrange the connecting reinforcement: Figure 1bAs shown in the figure, a reserved hole is set on the side formwork, connecting bars are placed in the reserved hole, and the vacant reserved hole and the inner cavity hole of the connecting bar are sealed with a rubber sealing plug; in the specific prefabrication process, in order to facilitate the use of a set of formwork, reserved holes are usually opened on the formworks on all four sides. When it is necessary to produce an ultra-high performance concrete prefabricated block without connecting bars on one side, the following method is used. Figure 1a The reserved hole rubber sealing plug is used to seal the vacant reserved hole; in addition, after the connecting rib is installed, the following Figure 1a The internal rubber sealing plug of the connecting rib seals the inner cavity hole of the connecting rib, thus preventing leakage of grout during the pouring process. In the specific application process of this embodiment, the internal rubber sealing plug of the U-shaped connecting rib and the connecting rib can also be combined into a U-shaped connecting rib and internal rubber sealing plug assembly 311.

[0071] Casting of ultra-high performance concrete: Figure 1c The ultra-high performance concrete slurry in the slurry hopper is poured into the mold cavity, and the molded ultra-high performance concrete prefabricated blocks containing aluminum oxide aggregate and having a maximum particle size greater than 80 mm are cast through the mold cavity;

[0072] De-moulding and curing: De-mould and cure the ultra-high performance concrete precast blocks after 1-2 days.

[0073] In this embodiment, the bottom limiting structure includes a baffle 7, and the baffle 7 is fixedly connected to the dam body by baffle fixing bolts. More specifically, the baffle 7 is an L-shaped baffle. Preferably, a reinforcing rib 71 is provided on the baffle to improve the supporting strength of the baffle 7.

[0074] In this embodiment, the side limiting structure includes an I-beam, which is assembled with the ultra-high performance concrete prefabricated block on the corresponding side, and the I-beam is fixedly connected to the dam body by an I-beam fixing bolt.

[0075] This embodiment also provides a reinforcement method using the above reinforcement structure, comprising the following steps:

[0076] S1: Install the bottom limiting structure and the side limiting structure;

[0077] S2: The ultra-high performance concrete precast blocks are hoisted and slid in between the side limiting structures in sequence until all the ultra-high performance concrete precast blocks are installed, and the bottom ultra-high performance concrete precast blocks are blocked by the bottom limiting structures;

[0078] S3: pouring ultra-high performance concrete at the joints between adjacent ultra-high performance concrete precast blocks, between the ultra-high performance concrete precast blocks and the side limiting structures, and between the ultra-high performance concrete precast blocks and the bottom limiting structures;

[0079] S4: Regularly spray and maintain the ultra-high performance concrete at the joints.

[0080] The following is a more detailed explanation:

[0081] like Figures 1a to 1k As shown, the reinforcement structure of this embodiment includes an ultra-high performance concrete prefabricated block 1 with U-shaped connecting ribs 31 on both sides, an I-beam 5, a baffle 7, and wet joint concrete 44. The two sides of the ultra-high performance concrete prefabricated block 1 are respectively fitted with the I-beam 5 on the corresponding side, and the bottom is fixed with a baffle 7 to prevent leakage when pouring concrete at the joint 4 after the ultra-high performance concrete prefabricated block 1 is installed, and at the same time plays a role in fixing the upper structure.

[0082] The specific reinforcement methods are:

[0083] Install I-beams and baffles: Figure 1g As shown, the baffle 7 and the I-beam 5 are installed at the designated position of the dam body 6. The baffle reinforcement rib 71 is set on the baffle 7 at the position corresponding to the I-beam 5 to fix the baffle, and the baffle is connected to the dam body 6 through the baffle fixing bolt 72 at the position corresponding to the baffle reinforcement rib 71. The I-beam 5 is installed according to the size of the ultra-high performance concrete prefabricated block 1, and corresponds to the position where the baffle reinforcement rib 71 is set on the baffle 7; the web of the I-beam 5 is the same thickness as the ultra-high performance concrete prefabricated block 1, that is, the two sides of the ultra-high performance concrete prefabricated block 1 can be directly embedded in the I-beam 5 on the corresponding side; the width of the wing plate of the I-beam 5 is greater than the width of the overhang 101 of the ultra-high performance concrete prefabricated block; the web spacing of the I-beams 5 on both sides is consistent with the width of the ultra-high performance concrete prefabricated block 1; the I-beam 5 is connected to the dam body 6 through the I-beam fixing bolt 51.

[0084] Assembling ultra-high performance concrete precast blocks: Figure 1g As shown, the ultra-high performance concrete prefabricated block 1 of this embodiment mainly adopts an ultra-high performance concrete prefabricated block with U-shaped connecting ribs 31 arranged on both sides. For the bottom ultra-high performance concrete prefabricated block, the side contacting the baffle 7 is not arranged with connecting ribs. Similarly, the side of the ultra-high performance concrete prefabricated block assembled with the I-beam is not arranged with connecting ribs. For the ultra-high performance concrete prefabricated blocks assembled in pairs, the U-shaped connecting ribs 31 on the opposite sides of the ultra-high performance concrete prefabricated blocks 1 are staggered with each other, and the U-shaped connecting ribs between the surfaces of adjacent ultra-high performance concrete prefabricated blocks 1 are staggered with each other (such as Figure 1f The ultra-high performance concrete prefabricated blocks 1 are slid in piece by piece from the top of the I-beam 5.

[0085] Ultra-high performance concrete at pouring joints: Figure 1h to Figure 1iAs shown, ultra-high performance concrete 44 is poured along the assembly joints from the top to fill the assembly joints 4; the assembly joints include: first assembly joints 41 between ultra-high performance concrete precast blocks, second assembly joints 42 between ultra-high performance concrete precast blocks and I-beams, and between ultra-high performance concrete precast blocks and the dam body; in addition, it also includes gaps between the baffles and the bottom ultra-high performance concrete precast blocks, etc.

[0086] Concrete maintenance at joints: Figure 1j to Figure 1k As shown, the joint concrete is cured by spraying until the joint concrete reaches a predetermined strength.

[0087] The embedded length and exposed length of the U-shaped connecting rib 31 of the ultra-high performance concrete prefabricated block 1 in this embodiment are consistent, and the exposed length is slightly smaller than the length of the joint between the two ultra-high performance concrete prefabricated blocks.

[0088] The wet-jointed concrete adopts ultra-high performance concrete with good fluidity, and its strength is slightly higher than that of the ultra-high performance concrete precast block 1, so that the bonding performance between the ultra-high performance concrete precast blocks can be reliably guaranteed.

[0089] Example 2

[0090] This embodiment is based on the embodiment 1, and is different from the embodiment 1 in that the three ultra-high performance concrete prefabricated blocks 1 are horizontally spliced ​​in this embodiment, that is, different from the I-beams 5 spliced ​​on both sides of the ultra-high performance concrete prefabricated blocks 1 in the embodiment 1. In this embodiment, a pad 52 with the same thickness as the bottom wing plate of the I-beam needs to be arranged between the two I-beams 5 to ensure that the three ultra-high performance concrete prefabricated blocks 1 connected horizontally are in the same plane. The bottom is consistent with the embodiment 1, and is fixed with a baffle 7 to prevent the ultra-high performance concrete prefabricated blocks 1 from leaking when pouring concrete at the splicing seam 4, and at the same time plays a role in fixing the upper structure.

[0091] The specific reinforcement methods are:

[0092] Install I-beams, baffles and pads: Figure 2aAs shown, the baffle 7, I-beam 5 and pad 52 are installed at the designated position of the dam body 6. The baffle 7 is provided with baffle reinforcing ribs 71 at the position corresponding to the I-beam 5 to fix the baffle, and the baffle is connected to the dam body 6 through baffle fixing bolts 72 at the position corresponding to the baffle reinforcing rib 71. The I-beam 5 is installed according to the size of the ultra-high performance concrete precast block 1, and corresponds to the position where the baffle reinforcing rib 71 is set on the baffle 7; the web of the I-beam 5 is the same thickness as the ultra-high performance concrete precast block 1, that is, the two sides of the ultra-high performance concrete precast block 1 can be directly embedded in the I-beam 5 on the corresponding side; the width of the wing plate of the I-beam 5 is greater than the width of the overhang 101 of the ultra-high performance concrete precast block; the web spacing of the I-beams 5 on both sides is consistent with the width of the three ultra-high performance concrete precast blocks 1; the I-beam 5 is connected to the dam body 6 by bolts 51; the pad 52 is connected to the dam body by bolts 53, and its installation position is the lower part of the joint 4 of the two ultra-high performance concrete precast blocks 1, and the three ultra-high performance concrete precast blocks 1 can be installed to the same height when used in conjunction with the I-beam 5.

[0093] Assembling ultra-high performance concrete precast blocks: Figure 2a As shown, in this embodiment, three ultra-high performance concrete precast blocks 1 can be installed horizontally between two I-beams 5, wherein two joints 4 are formed between the three ultra-high performance concrete precast blocks 1, and pads 52 are provided at the bottom of the joints 4; the middle ultra-high performance concrete precast block has U-shaped connecting ribs 31 arranged on four sides, and the ultra-high performance concrete precast block 1 adjacent to the I-beam 5 has U-shaped connecting ribs 31 arranged on three sides; that is, no connecting ribs are arranged on the sides of the ultra-high performance concrete precast blocks that are in contact with or assembled with the baffle 7 and the I-beam 5; the U-shaped connecting ribs 31 on the opposite sides of the ultra-high performance concrete precast blocks 1 are arranged in an interlaced manner; the ultra-high performance concrete precast blocks 1 are slid in one by one from the top of the I-beam 5 until all the ultra-high performance concrete precast blocks 1 are installed.

[0094] Pouring concrete ( Figure 2b-Figure 2c ): Based on Example 1, wet joint concrete 44 is poured along the assembly joint from the top to fill the assembly joint 4; the assembly joint includes: a first joint 41 between the ultra-high performance concrete precast blocks, a second joint 42 between the ultra-high performance concrete precast blocks and the I-beam; in addition, it also includes the gap between the baffle and the bottom ultra-high performance concrete precast blocks, etc.

[0095] Maintenance into assembled protective layer structure ( Figure 2d-Figure 2e ): After pouring the joints, maintenance is carried out until the joint concrete reaches the predetermined strength.

[0096] Example 3

[0097] The difference of this embodiment is that: the side limiting structure includes threaded connecting ribs arranged in a row and spaced vertically, and baffles arranged on the outside of the threaded connecting ribs, the threaded connecting ribs are anchored to the dam body, and the baffles are fixed to the dam body by baffle fixing bolts. In this embodiment, threaded connecting ribs 43 are anchored at the corresponding positions of the dam body, and the side positioning of the ultra-high performance concrete precast block 1 is achieved by the threaded connecting ribs 43, and the ultra-high performance concrete precast block 1 can be connected to the dam body by pouring concrete with the ultra-high performance concrete precast block 1. The arrangement position of the threaded connecting ribs 43 is similar to that of the I-beam 5, both of which are on both sides of the ultra-high performance concrete precast block 1. The difference is that the size of the threaded connecting ribs 43 anchored in the dam body is at the lower part of the U-shaped connecting ribs and does not exceed the ultra-high performance concrete precast block 1; then baffles are installed on both sides to prevent leakage of concrete during pouring.

[0098] The specific preparation steps are:

[0099] Assembly of baffles and anchoring of threaded connecting ribs ( Figure 3a ): Install the baffle 7 and anchor the threaded connecting rib 43 at the designated position of the dam body 6. The position where the threaded connecting rib is anchored into the dam body 6 is similar to that of the I-beam 5; the difference is that the anchoring position of the threaded connecting rib 43 corresponds to the position of the U-shaped connecting rib of the ultra-high performance concrete prefabricated block 1, that is, the U-shaped connecting ribs 31 in the assembly seams 4 of adjacent ultra-high performance concrete prefabricated blocks 1 are arranged alternately, and the lower part of the U-shaped connecting rib 31 is the threaded connecting rib 43; after the threaded connecting rib 43 is anchored into the dam body 6 according to the preset position, the baffle 7 is installed on both sides of the protective structure.

[0100] Assembling ultra-high performance concrete precast blocks ( Figure 3a ): This step is similar to the step in Example 1. The ultra-high performance concrete precast blocks 1 are slid into the anchored threaded connecting ribs 43 along the top in sequence; the U-shaped connecting ribs 31 on the opposite sides of the ultra-high performance concrete precast blocks 1 are arranged in an interlaced manner, and the U-shaped connecting ribs 31 between adjacent surfaces of different ultra-high performance concrete precast blocks 1 are interlaced.

[0101] Pouring concrete ( Figure 3b-Figure 3c ): Pour wet joint concrete 44 along the assembly joint from the top to fill the assembly joint 4.

[0102] Maintenance into assembled protective layer structure ( Figure 3d-Figure 3e ): After pouring the joints, maintenance is carried out until the joint concrete reaches the predetermined strength.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance. Features: The invention comprises a bottom limiting structure, side limiting structures arranged on both sides of the bottom limiting structure, and a plurality of ultra-high performance concrete prefabricated blocks (1) assembled in an area enclosed by the bottom limiting structure and the side limiting structures, wherein the bottom limiting structure and the side limiting structures are both fixedly connected to the dam body, and ultra-high performance concrete is poured at the joints between adjacent ultra-high performance concrete prefabricated blocks, between the ultra-high performance concrete prefabricated blocks and the side limiting structures, and between the ultra-high performance concrete prefabricated blocks and the bottom limiting structure for connection.

2. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 1, Features: The prefabrication process of the ultra-high performance concrete prefabricated block comprises the following steps: Forming the mold: constructing a mold cavity through a template (2), shaping the mold cavity through a template fixing frame (21), and applying a mold release agent on the inner surface of the mold cavity; Arrange the connecting ribs: set a reserved hole (22) on the lateral template, place the connecting ribs (3) in the reserved hole, and use a rubber sealing plug to seal the vacant reserved hole and the inner cavity hole of the connecting ribs; Casting concrete: casting ultra-high performance concrete containing aluminum oxide aggregate and with a maximum particle size greater than 80 mm through the mold cavity to form ultra-high performance concrete precast blocks; demolding and curing: demolding and curing the ultra-high performance concrete precast blocks after 1-2 days.

3. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 2, Features: When two ultra-high performance concrete prefabricated blocks (1) are assembled, the connecting ribs (3) on the assembly sides of the two ultra-high performance concrete prefabricated blocks (1) are arranged staggered; the connecting ribs on the same side of the ultra-high performance concrete prefabricated blocks (1) are at the same height and are arranged horizontally.

4. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 3, Features: The bottom limiting structure comprises a baffle (7), and the baffle is fixedly connected to the dam body (6) via baffle fixing bolts (72).

5. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 4, Features: The side limiting structure comprises threaded connecting ribs (43) arranged in a row and spaced vertically, and baffles arranged outside the threaded connecting ribs, the threaded connecting ribs being anchored to the dam body, and the baffles being fixedly connected to the dam body via baffle fixing bolts.

6. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 5, Features: The baffle plate is provided with baffle plate reinforcing ribs (71).

7. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 4, Features: The side limiting structure comprises an I-beam (5), the I-beam is assembled with the ultra-high performance concrete prefabricated block on the corresponding side, and the I-beam is fixedly connected to the dam body via an I-beam fixing bolt (51).

8. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 7, Features: When the side limiting structure adopts an I-beam, a pad (52) is pre-installed at the installation position of the ultra-high performance concrete prefabricated block. The pad is fixedly connected to the dam body through a pad fixing bolt (53). The thickness of the pad is consistent with the thickness of the bottom wing plate of the I-beam.

9. The assembled reinforcement structure for improving the dam's anti-penetration explosion protection performance according to claim 1, Features: The side of the ultra-high performance concrete prefabricated block (1) is provided with an overhanging eave (101) which can be used for sealing the wet joint concrete top formwork.

10. A reinforcement method using the reinforcement structure according to claim 1, It is characterized in that The steps include: S1: Install the bottom limiting structure and the side limiting structure; S2: Using the sliding-in assembly method, the ultra-high performance concrete precast blocks are sequentially slid in between the side limiting structures until all the ultra-high performance concrete precast blocks are installed, and the bottom ultra-high performance concrete precast blocks are blocked by the bottom limiting structures; S3: pouring ultra-high performance concrete at the joints between adjacent ultra-high performance concrete precast blocks, between the ultra-high performance concrete precast blocks and the side limiting structures, and between the ultra-high performance concrete precast blocks and the bottom limiting structures; S4: Ultra-high performance concrete in curing joints.

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