Anti-explosion tough face plate structure of rock-fill dam and construction method of anti-explosion tough face plate structure

Abstract

The rock-fill dam anti-knock tough panel structure comprises an anti-knock tough panel and a transition cushion layer which are arranged on the upstream side from outside to inside, a rock-fill body is arranged on the downstream side of the transition cushion layer, a wave wall is arranged at the top end of the anti-knock tough panel, a toe board is arranged at the bottom end of the anti-knock tough panel, and the anti-knock tough panel and the transition cushion layer are arranged on the downstream side of the transition cushion layer. The portion, close to the transition cushion layer, of the anti-knock tough panel is a common concrete layer, the portion, away from the transition cushion layer, of the anti-knock tough panel is a fiber-reinforced high-performance concrete layer, and the portion between the common concrete layer and the fiber-reinforced high-performance concrete layer is filled with wave-absorbing and energy-dissipating materials. On one hand, the anti-cracking and anti-seepage capacities of the panel are improved; and on the other hand, explosion impact is resisted and absorbed through the functional gradient panel, and the anti-explosion capacity of the panel is improved. Meanwhile, all the components of the panel can be partially or integrally replaced according to the damage condition after explosion, rapid repairing of the panel structure is achieved, and the design target of the anti-explosion toughness of the concrete faced rockfill dam is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of civil water conservancy engineering, and in particular to an explosion-resistant toughness panel structure of a rockfill dam and a construction method thereof. Background Art

[0002] Concrete panel rockfill dams have the advantages of high material utilization, fast construction speed, low maintenance cost, and strong reservoir regulation capacity. They are increasingly used in the construction of hydropower station dams and are widely used.

[0003] In recent years, the international situation has been turbulent and local wars have occurred frequently. High dams and reservoirs are often defined as high-value targets due to the huge destructive effects they will cause after being destroyed. Therefore, improving the seismic resilience of dams is a key task to ensure the normal operation of dams and resist military attacks, and has great social and military application value.

[0004] At present, most of my country's face rockfill dams are ordinary concrete face rockfill dams. In the design, only normal working performance is considered, and the impact of special environments such as explosions is not considered. Therefore, the anti-explosion and anti-military strike capabilities of face rockfill dams are generally insufficient. At the same time, due to the weak resistance to deformation, especially tensile deformation, the ordinary concrete face panels in rockfill dams usually have structural cracks caused by loads, shrinkage cracks of the concrete material itself, and temperature cracks caused by large-volume concrete pouring during normal use. Face plate cracking is also known as an important threat to the impermeability of the dam body. In recent years, toughness theory has been continuously developed in the fields of urban disaster prevention and engineering earthquake resistance. Toughness requires engineering facilities to have the ability to resist, absorb and adapt to explosion disasters and quickly recover from explosion disasters. Therefore, the research and development of new explosion-resistant tough face rockfill dams is a top priority to ensure the safe, reliable and stable operation of major national engineering facilities.

[0005] Chinese invention patent: Announcement number is "CN113404009B", and the name is "A new type of rockfill dam concrete panel structure and construction method", which discloses a new type of rockfill dam concrete panel structure, including a panel body arranged on the slope of the rockfill dam body, the panel body includes an ordinary concrete area and at least one ECC plastic area arranged in the ordinary concrete area, the ordinary concrete area is cast with ordinary concrete materials, and the ECC plastic area is cast with fiber-reinforced cement-based composite material ECC. This technical solution replaces part of the ordinary concrete area with an ECC plastic area, transforming the original rigid panel body into a relatively flexible panel body, and reasonably arranges the ECC plastic area to ensure that the fiber-reinforced cement-based composite material ECC enters the plastic state before the ordinary concrete material. When the ECC plastic area is deformed, the ordinary concrete area is in the elastic undamaged stage, which can improve the panel's ability to actively adapt to deformation, significantly reduce the risk of panel cracking of high rockfill dams, and promote the development of my country's high concrete panel rockfill dam construction technology. However, this technical solution has no effective effect on improving the bearing capacity and explosion resistance of the panel.

[0006] Chinese invention patent: Publication number "CN113006006A", titled "A new type of panel structure for a panel rockfill dam and its construction method", discloses a new type of panel structure for a panel rockfill dam and its construction method, wherein the panel structure includes a reinforced concrete panel, a cushion layer area, a transition layer area, a wave-breaking wall and a concrete toe plate, and an HDPE anti-seepage structure is arranged between the cushion layer area and the reinforced concrete panel; the HDPE anti-seepage structure includes a number of DPE membrane units connected in sequence: two adjacent HDPE membrane units are connected by HDPE double-wing concrete connecting locks, and the free ends of the HDPE membrane units at both ends are respectively connected to HDPE single-wing concrete connecting locks; the connecting lock body of the HDPE double-wing concrete connecting lock is cast in the reinforced concrete panel; the connecting lock body of the HDPE single-wing concrete connecting lock is cast in the corresponding wave-breaking wall / concrete toe plate. This technical solution can significantly reduce the risk of penetration damage caused by failure of the reinforced concrete panel by setting up the HDPE anti-seepage structure. This technical solution focuses on the HDPE anti-seepage structure between panels to improve the anti-seepage level of the weak parts of the panels, but it still uses ordinary panel types, which has no beneficial effect on the cracking of the panels and the improvement of the panels' explosion resistance. Summary of the invention

[0007] In order to solve the problem of insufficient explosion resistance and easy cracking of the panel rockfill dam in the prior art, the present invention proposes an explosion-resistant toughness panel structure and construction method for rockfill dam, aiming to improve the explosion resistance and toughness of the panel of the rockfill dam.

[0008] The present invention is realized through the following technical scheme: comprising an explosion-resistant toughness panel and a transition cushion layer arranged from outside to inside on the upstream side, a rockfill body is arranged on the downstream side of the transition cushion layer, a wave-breaking wall is arranged on the top of the explosion-resistant toughness panel, a toe plate is arranged on the bottom of the explosion-resistant toughness panel, the explosion-resistant toughness panel is close to the transition cushion layer as an ordinary concrete layer, and is far away from the transition cushion layer as a fiber-reinforced high-performance concrete layer, and wave-absorbing and energy-dissipating materials are filled between the ordinary concrete layer and the fiber-reinforced high-performance concrete layer.

[0009] As a further preference, the ordinary concrete layer is formed by splicing a number of prefabricated corrugated hollow concrete slabs, the prefabricated corrugated hollow concrete slab is mainly composed of ordinary concrete slabs, and multiple layers of steel bars are arranged in the ordinary concrete slabs. The prefabricated corrugated hollow concrete slabs also include a fiber-reinforced high-performance concrete layer bonded to the ordinary concrete slabs, the side of the ordinary concrete slab bonded to the transition cushion layer is a flat surface, and the side bonded to the fiber-reinforced high-performance concrete layer is a bonding surface, and the bonding surface is corrugated as a whole.

[0010] As a further preference, a plurality of channels are further provided inside the prefabricated corrugated hollow concrete slab along the width direction, the cross-sectional shape of the channels matches the waveform of the fitting surface, and the channels are filled with wave absorbing and energy dissipating materials.

[0011] As a further preference, the prefabricated corrugated hollow concrete slab is provided with an upper tooth joint on one side along the corrugated direction of the bonding surface, and a lower tooth joint on the other side, and reserved bolt holes are provided at corresponding positions of the upper tooth joint and the lower tooth joint.

[0012] As a further preference, the waveform of the fitting surface is an angular waveform, and the cross-section of the channel is a square.

[0013] As a further preference, the waveform of the fitting surface is an arc-shaped waveform, and the cross-section of the channel is circular.

[0014] As a further preference, the wave absorbing and energy dissipating material is foam metal.

[0015] As a further preference, the wave absorbing and energy dissipating material is polyurethane foam.

[0016] As a further preference, the fiber reinforced high performance concrete layer is cast by ECC.

[0017] As a further preferred embodiment, the present invention further provides a construction method for a rockfill dam explosion-resistant toughness panel structure according to the present invention, the steps of which are as follows:

[0018] S1: The factory processes the steel formwork, prefabricates the prefabricated corrugated hollow concrete slab, and transports it to the project site;

[0019] S2: After the dam body gravel pile is compacted to form a rockfill body, the slope on the upstream side is leveled and a cushion layer is paved with semi-permeable, permeability-stable and low-compressible rock materials to form a transition cushion layer;

[0020] S3: Filling the channel with wave absorbing and energy dissipating materials;

[0021] S4: Roughen the upper and lower apexes and the surfaces of the faying surfaces, and apply interface adhesive on the upper and lower apexes;

[0022] S5: The upstream slope is paved with prefabricated corrugated hollow concrete slabs, which are connected with bolts perpendicular to the slope and spliced ​​with upper and lower tooth joints parallel to the slope. At the same time, water-stopping devices are arranged at all joints.

[0023] S6: continuous pouring of fiber-reinforced high-performance concrete layers;

[0024] S7: Install toe board and wave wall.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention uses ordinary concrete as the matrix and lays fiber-reinforced high-performance concrete material (ECC or UHPC) on the top surface. On the one hand, the bearing capacity of the panel is effectively improved. On the other hand, the fiber-reinforced high-performance concrete material has strong deformation ability, avoiding structural and material cracks of the panel.

[0027] (2) The panel in the present invention is a functional gradient composite panel, which can resist, absorb and adapt to explosion disasters. The outer fiber-reinforced high-performance concrete layer has high strength and large deformation, can resist structural loads and explosion loads, and effectively improve the panel's bearing capacity and deformation capacity; the wave-absorbing and energy-absorbing material in the duct can effectively reduce the impact of the explosion shock wave, and minimize the impact of the explosion shock on the inner layer of ordinary concrete and the rockfill dam body; the inner layer of ordinary concrete can resist the impact of the weakened explosion shock.

[0028] (3) The anti-explosion toughness panel structure of the rockfill dam designed by the present invention can be quickly repaired after explosion damage. According to the damage of different functional layers of the panel, from the precast concrete matrix to the energy-absorbing material and fiber-reinforced high-performance surface layer, partial and overall repair and replacement can be quickly achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the rockfill dam in the present invention.

[0030] Figure 2 It is a schematic cross-sectional view of the anti-explosion toughness face plate structure of the rockfill dam in the present invention.

[0031] Figure 3It is a schematic diagram of connecting adjacent panels in the present invention.

[0032] Figure 4 It is a flow chart of the construction method in the present invention.

[0033] Indicated in the figure:

[0034] 1. Ordinary concrete layer; 2. Wave-absorbing and energy-dissipating materials; 3. Fiber-reinforced high-performance concrete layer; 4. Channel; 5. Fitting surface; 6. Upper tooth joint; 7. Lower tooth joint; 8. Reserved bolt holes; 9. Explosion-resistant toughness panel; 10. Transition cushion layer; 11. Rockfill body; 12. Toe board; 13. Wave-breaking wall. DETAILED DESCRIPTION

[0035] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings.

[0036] like Figures 1 to 3 As shown, the present invention provides a rockfill dam explosion-resistant toughness panel structure, including an explosion-resistant toughness panel 9 and a transition cushion layer 10 arranged from outside to inside on the upstream side, a rockfill body 11 is arranged on the downstream side of the transition cushion layer 10, a wave-breaking wall 13 is arranged at the top of the explosion-resistant toughness panel 9, and a toe plate 12 is arranged at the bottom of the explosion-resistant toughness panel 9. The explosion-resistant toughness panel 9 is a multi-layered multifunctional panel composed of an ordinary concrete layer 1, a wave-absorbing and energy-dissipating material 2, and a fiber-reinforced high-performance concrete layer 3. The explosion-resistant toughness panel 9 is close to the transition cushion layer 10 as an ordinary concrete layer 1, and is far away from the transition cushion layer 10 as a fiber-reinforced high-performance concrete layer 3, and the wave-absorbing and energy-dissipating material 2 is filled between the ordinary concrete layer 1 and the fiber-reinforced high-performance concrete layer 3.

[0037] The ordinary concrete layer 1 is formed by splicing a number of prefabricated corrugated hollow concrete panels, and the prefabricated corrugated hollow concrete panels include ordinary concrete panels, channels 4, upper joints 6 and lower joints 7. Multiple layers of steel bars are arranged in the ordinary concrete panels as the base of the panel structure. The prefabricated corrugated hollow concrete panels are mainly composed of ordinary concrete panels, and the side of the ordinary concrete panels that is bonded to the transition cushion layer 10 is a plane, and the side of the ordinary concrete panels that is bonded to the fiber-reinforced high-performance concrete layer 3 is a bonding surface 5. The bonding surface 5 is corrugated as a whole, and the setting of the bonding surface 5 can enhance the bonding performance between the interface of the ordinary concrete panel and the fiber-reinforced high-performance concrete layer 3. The waveform of the bonding surface 5 can be an angular waveform or an arc waveform, etc. The waveform direction of the bonding surface 5 is the length direction of the prefabricated corrugated hollow concrete panel.

[0038] The prefabricated corrugated hollow concrete slab is further provided with a plurality of channels 4 along the width direction. The cross-sectional shape of the channels 4 corresponds to the waveform of the fitting surface 5. If the waveform of the fitting surface 5 is an angular waveform, the cross-sectional shape of the channels 4 is a square; if the waveform of the fitting surface 5 is an arc waveform, the cross-sectional shape of the channels 4 is a circle, etc. The channels 4 are filled with wave-absorbing and energy-dissipating materials 2, which are preferably foamed metal, polyurethane foam, ceramics, etc., as an anti-explosion energy-absorbing functional layer.

[0039] The prefabricated corrugated hollow concrete slab is provided with an upper tooth joint 6 on one side along the corrugated direction of the bonding surface 5, and a lower tooth joint 7 on the other side. The upper tooth joint 6 and the lower tooth joint 7 are spliced ​​together so that a plurality of prefabricated corrugated hollow concrete slabs form a common concrete layer 1. The upper tooth joint 6 and the lower tooth joint 7 are provided with reserved bolt holes 8 at positions corresponding to the upper tooth joint 6 and the lower tooth joint 7, which are used to fix and connect two adjacent prefabricated corrugated hollow concrete slabs.

[0040] The fiber-reinforced high-performance concrete layer 3 is made of high-strength, high-ductility high-performance concrete such as UHPC or ECC, and is cast on site as a resistance functional layer of the structural explosion-proof panel.

[0041] like Figure 4 As shown, the present invention also provides a construction method for the explosion-resistant toughness panel structure of a rockfill dam, and the construction steps are as follows:

[0042] S1: The factory processes the steel formwork, prefabricates the prefabricated corrugated hollow concrete slab, and transports it to the project site;

[0043] S2: After the dam body gravel pile is compacted to form the rockfill body 11, the upstream slope is leveled and a cushion layer is paved with semi-permeable, permeability-stable and low-compressible rock material to form a transition cushion layer 10 as a support for the panel;

[0044] S3: Filling the channel 4 of the prefabricated corrugated hollow concrete slab with the wave absorbing and energy dissipating material 2;

[0045] S4: roughening the upper tooth joint 6, the lower tooth joint 7 and the bonding surface 5 of the prefabricated corrugated hollow concrete slab, and applying interface adhesive on the upper tooth joint 6 and the lower tooth joint 7;

[0046] S5: The upstream slope is paved with prefabricated corrugated hollow concrete slabs, which are connected with bolts perpendicular to the slope and spliced ​​with upper tooth joints 6 and lower tooth joints 7 parallel to the slope. At the same time, water-stopping devices are arranged at all joints.

[0047] S6: continuous pouring of 3 layers of fiber-reinforced high-performance concrete, paying special attention to the pouring of joints;

[0048] S7: Install the toe board 12 and the wave-breaking wall 13.

[0049] If the explosion-resistant toughness panel 9 of the rockfill dam explosion-resistant toughness panel structure designed by the present invention is attacked by an explosion, each functional layer can perform partial or overall rapid repair of the panel according to the damage situation according to the above-mentioned construction steps, especially the replacement of the ordinary concrete layer 1 and the wave-absorbing and energy-dissipating material 2.

[0050] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A blast-resistant toughness panel structure for a rockfill dam, comprising a blast-resistant toughness panel (9) and a transition cushion (10) arranged from outside to inside on the upstream side, a rockfill body (11) arranged on the downstream side of the transition cushion (10), a wave-breaking wall (13) arranged at the top of the blast-resistant toughness panel (9), and a toe plate (12) arranged at the bottom of the blast-resistant toughness panel (9), characterized in that: The explosion-resistant toughness panel (9) is a common concrete layer (1) close to the transition cushion layer (10), and is a fiber-reinforced high-performance concrete layer (3) away from the transition cushion layer (10); and wave-absorbing and energy-dissipating material (2) is filled between the common concrete layer (1) and the fiber-reinforced high-performance concrete layer (3).

2. The anti-explosion toughness panel structure of a rockfill dam according to claim 1, characterized in that: The ordinary concrete layer (1) is formed by splicing a plurality of prefabricated corrugated hollow concrete slabs. The prefabricated corrugated hollow concrete slab is mainly composed of ordinary concrete slabs. Multiple layers of steel bars are arranged inside the ordinary concrete slabs. The prefabricated corrugated hollow concrete slabs also include a fiber-reinforced high-performance concrete layer (3) bonded to the ordinary concrete slabs. The surface of the ordinary concrete slab bonded to the transition cushion layer (10) is a flat surface, and the surface of the ordinary concrete slab bonded to the fiber-reinforced high-performance concrete layer (3) is a bonding surface (5). The bonding surface (5) is corrugated as a whole.

3. The anti-explosion toughness panel structure of a rockfill dam according to claim 2, characterized in that: A plurality of channels (4) are also arranged inside the prefabricated corrugated hollow concrete slab along the width direction, the cross-sectional shape of the channels (4) matches the corrugation of the fitting surface (5), and the channels (4) are filled with wave absorbing and energy dissipating material (2).

4. The anti-explosion toughness panel structure of a rockfill dam according to claim 3, characterized in that: The prefabricated corrugated hollow concrete slab is provided with an upper tooth joint (6) on one side along the corrugated direction of the bonding surface (5), and a lower tooth joint (7) on the other side, and reserved bolt holes (8) are provided at positions corresponding to the upper tooth joint (6) and the lower tooth joint (7).

5. The anti-explosion toughness panel structure of a rockfill dam according to claim 4, characterized in that: The waveform of the fitting surface (5) is an angular waveform, and the cross section of the channel (4) is a square.

6. The anti-explosion toughness panel structure of a rockfill dam according to claim 4, characterized in that: The waveform of the fitting surface (5) is an arc-shaped waveform, and the cross-section of the channel (4) is circular.

7. The anti-explosion toughness panel structure of a rockfill dam according to claim 4, characterized in that: The wave absorbing and energy dissipating material (2) is foamed metal.

8. The anti-explosion toughness panel structure of a rockfill dam according to claim 4, characterized in that: The wave absorbing and energy dissipating material (2) is polyurethane foam.

9. The anti-explosion toughness panel structure of a rockfill dam according to claim 4, characterized in that: The fiber-reinforced high-performance concrete layer (3) is cast by ECC.

10. A construction method for a rockfill dam explosion-resistant toughness panel structure applicable to any one of claims 4 to 9, characterized in that: The steps are as follows: S1: The factory processes the steel formwork, prefabricates the prefabricated corrugated hollow concrete slab, and transports it to the project site; S2: After the dam body gravel pile is compacted to form a rockfill body (11), the slope surface on the upstream side is leveled and a cushion layer is paved with semi-permeable, permeability-stable and low-compressibility rock materials to form a transition cushion layer (10); S3: filling the channel (4) with a wave absorbing and energy dissipating material (2); S4: roughening the upper tooth joint (6), the lower tooth joint (7) and the bonding surface (5), and applying interface adhesive on the upper tooth joint (6) and the lower tooth joint (7); S5: The upstream slope is paved with prefabricated corrugated hollow concrete slabs, which are connected by bolts perpendicular to the slope and spliced ​​with upper tooth joints (6) and lower tooth joints (7) parallel to the slope, and water-stopping devices are arranged at all joints; S6: continuous pouring of fiber reinforced high performance concrete layer (3); S7: Install the toe board (12) and the wave-breaking wall (13).

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