A reinforcement structure system of a dam body and construction method thereof

Abstract

The present invention relates to a reinforcement structure system of a dam body and a construction method thereof, comprising a pier body, a plate body and a plurality of beam bodies; the bottom of the pier body is connected to the outer base of the dam foot, one side of the pier body is connected to the dam slope surface, the top surface height of the pier body is less than the top surface height of the dam body; the bottom surface of the plate body is connected to the top surface of the pier body; the thickness of the plate body is less than the thickness of the pier body; one side of the plate body is connected to the dam slope surface above the top surface of the pier body; the bottom surface of each beam body is connected to the top surface of the pier body, one side of each beam body is connected to the side of the plate body away from the dam slope, and a plurality of beam bodies are distributed at intervals; the pier body, the plate body and the dam slope surface form a closed whole. The structural system has a good reinforcement effect on the dam body, strong anti-slip stability, strong anti-seepage function, simple construction method and short construction period.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation treatment, and in particular relates to a reinforcement structure system of a dam body and a construction method thereof. Background Art

[0002] Dams are important buildings for intercepting water or consolidating dangerous places in river works. As time goes by, the strength of masonry structures will deteriorate due to the erosion of rainwater all year round. In particular, it is very important to take reinforcement measures for dams with mortar-stone structures in order to avoid the serious danger of rupture, overall sliding or overturning of the dam at any time. Among the existing reinforcement technologies for mortar-stone dams, anti-slip piles, foot pressers, grouting reinforcement and other methods are generally used. However, for situations where the environment around the dam is complex and many pipes are installed underground at the dam foundation, the reinforcement methods of the existing technologies will damage the pipes at the bottom of the dam, or the reinforcement effect is poor and the anti-slip stability is poor.

[0003] For example, the leachate regulating pool dam of a city landfill was originally a mortar-masonry structure. As the dam was built a long time ago, a large amount of rainwater would wash away the surface of the dam during the rainy season. At the same time, the dam shoulder on the east side of the dam is the rapids trough of the north flood diversion ditch in the field, and the box culvert of the south flood diversion ditch is below the west side of the dam. The drainage of the north and south flood ditches converges in the sedimentation tank at the foot of the dam. The flow rate during heavy rains is very large. Long-term scouring causes a large number of voids on the surface and base of the dam, resulting in a serious danger that the dam may rupture, slide as a whole, or overturn at any time.

[0004] At present, the existing reinforcement technologies for grouted stone dams generally use anti-slip piles, foot presses, grouting reinforcement and other methods. However, considering that the surrounding environment of the leachate regulating pool dam is extremely complex, especially the downstream of the dam body is close to the leachate treatment plant and the landfill gas power plant, the leachate drainage pipes buried under the dam foundation are intricate and all connected to the equipment in the plant. If anti-slip piles are set at the dam foundation, the pile body construction cannot avoid damage to the leachate pipeline; if grouting reinforcement is used for the dam body, its reinforcement effect is not enough to ensure the overall anti-slip performance of the dam body under extremely unfavorable working conditions, and as time goes by, the strength of the masonry structure continues to deteriorate and decrease, which is easy to continue to induce major dangers in the dam body.

[0005] The description of the existing dam reinforcement technology in the background technology is part of the inventor's cognitive argumentation and analysis of the innovation of the present invention. It is not the prior art known to ordinary technicians and cannot be directly used to evaluate the novelty or creativity of the present application. Summary of the invention

[0006] The purpose of the present invention is to address the technical problems existing in the prior art of dam body reinforcement methods, such as poor reinforcement effect, poor anti-slip stability, damage to the pipe body at the bottom of the dam body, etc. The present invention provides a dam body reinforcement structure system and a construction method thereof. The structure system has a good reinforcement effect on the dam body, strong anti-slip stability, and timely reinforces the mortar-made stone dam using limited construction space. It has high construction feasibility for special environments and specific conditions, and can also ensure the normal and safe operation of the dam body and its surrounding equipment.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A reinforcement structure system for a dam body, comprising a pier body, a plate body and a plurality of beam bodies;

[0009] The bottom of the pier body is connected to the outer base of the dam foot, one side of the pier body is connected to the slope of the dam, and the top surface height of the pier body is less than the top surface height of the dam body;

[0010] The bottom surface of the plate body is connected to the top surface of the pier body; the thickness of the plate body is less than the thickness of the pier body; one side surface of the plate body is connected to the dam slope surface above the top surface of the pier body;

[0011] The bottom surface of each beam body is connected to the top surface of the pier body, and one side surface of each beam body is connected to the side surface of the plate body away from the dam slope. Several beam bodies are distributed at intervals; the pier body, the plate body and the dam slope surface form a closed whole.

[0012] The present invention provides a reinforcement structure system consisting of a pier body, a plate body and a plurality of beam bodies. The existence of the pier body effectively improves the stability of the dam body. The back-attached beam body and the plate body are back-pressed on the pier body, which effectively improves the reinforcement effect. At the same time, the reinforcement structure system and the dam slope surface form a closed whole, which also enhances the anti-seepage property of the dam body. The reinforcement structure of the present invention has a good reinforcement effect on the dam body, has strong anti-slip stability, and utilizes limited construction space to timely reinforce the mortar-laid stone dam, thereby minimizing the disturbance to the original dam body to the maximum extent. It has high construction feasibility for special environments and specific conditions, and can also ensure the normal and safe operation of the dam body and its surrounding equipment. At the same time, the design of the beam body of the present invention effectively saves material consumption and reduces engineering workload while ensuring a good reinforcement effect, is convenient for construction operation, and has high economic rationality.

[0013] The thickness of the plate body or the pier body at the bottom of the beam body in the above technical solution refers to the horizontal distance between the side of the plate body or the pier body away from the dam body and the dam slope.

[0014] The pier body, the plate body and the dam slope surface form a closed whole, which means that one side surface of the pier body, one side surface of the plate body and the dam slope surface are seamlessly connected and closely attached to each other.

[0015] Furthermore, the top surface of the pier body is located at the middle height or the middle-upper height of the dam body.

[0016] Furthermore, the pier body is a gravity pier.

[0017] Further, the bottom of the pier body is connected to the outer base of the dam foot through a plurality of first anchor rods. Further, the plurality of first anchor rods are dispersedly arranged. Preferably, the plurality of first anchor rods are evenly dispersedly arranged.

[0018] Further, one side of the pier body is connected to the dam slope surface through a plurality of second anchor rods. Further, the plurality of second anchor rods are dispersedly arranged. Preferably, the plurality of second anchor rods are evenly dispersedly arranged.

[0019] Furthermore, the bottom surface of the plate body is connected to the top surface of the pier body through a plurality of third anchor rods. Furthermore, the plurality of third anchor rods are dispersedly arranged. Preferably, the plurality of third anchor rods are evenly dispersedly arranged.

[0020] Further, one side surface of the plate body is connected to the dam slope surface above the top surface of the pier body through a plurality of fourth anchor rods. Further, the plurality of fourth anchor rods are dispersedly arranged. Preferably, the plurality of fourth anchor rods are evenly dispersedly arranged.

[0021] Further, the bottom surface of each beam body is connected to the top surface of the pier body through a plurality of fifth anchor rods. Further, the plurality of fifth anchor rods are dispersedly arranged. Preferably, the plurality of fifth anchor rods are evenly dispersedly arranged.

[0022] Further, one side of each beam body is connected to the other side of the plate body away from the dam slope through a plurality of sixth anchor rods. Further, the plurality of sixth anchor rods are dispersedly arranged. Preferably, the plurality of sixth anchor rods are evenly dispersedly arranged.

[0023] Furthermore, the beam body and the plate body are an integrated structural component.

[0024] Furthermore, the length of the plurality of first anchor rods embedded in the outer base of the dam foot is at least 0.5 m, and a suitable embedding length is beneficial to improving the stability of the newly built reinforcement structure.

[0025] Furthermore, the length of another portion of the plurality of first anchor rods exposed on the outer base surface of the dam foot of the plurality of first anchor rods is at least 0.5 m.

[0026] Furthermore, the length of a plurality of the second anchor rods embedded in the dam slope surface is at least 0.5 m.

[0027] Furthermore, the length of another portion of the plurality of first anchor rods exposed on the outer base surface of the dam foot of the plurality of first anchor rods is at least 0.5 m.

[0028] Furthermore, the pier body is a reinforced concrete structure.

[0029] Furthermore, the plate body is a reinforced concrete structure.

[0030] Furthermore, each of the beams is a reinforced concrete structure.

[0031] Furthermore, each of the first anchor rods is a structural member made of steel bar material.

[0032] Furthermore, each of the second anchor rods is a structural member made of steel bars.

[0033] Furthermore, each of the third anchor rods is a structural member made of steel bar material.

[0034] Furthermore, each of the fourth anchor rods is a structural member made of steel bar material.

[0035] Furthermore, each of the fifth anchor rods is a structural member made of steel bar material.

[0036] Furthermore, each of the sixth anchor rods is a structural member made of steel bar material.

[0037] Furthermore, steps are provided at both ends of the pier body. During heavy rains, rainwater that directly washes the top of the pier can be dissipated through the steps and then discharged along the surface of the pier to prevent long-term direct washing of the pier; at the same time, the steps make it easier for management personnel to walk and inspect on the top of the pier during operation, ensuring the safety of the inspectors and making the appearance more beautiful.

[0038] The present invention also provides a construction method for the reinforcement structure system of the dam body, comprising the following steps:

[0039] Step 1

[0040] Construction of the pier:

[0041] Embedding a portion of the plurality of first anchor rods into the outer base of the dam foot, and exposing another portion of the plurality of first anchor rods on the outer base of the dam foot;

[0042] embedding a portion of the plurality of second anchor rods into the dam slope surface, and exposing another portion of the plurality of second anchor rods outside the dam slope surface;

[0043] Then, a steel frame of the pier body is built above the outer base of the dam foot and close to the dam slope surface, and a first concrete material is poured into the steel frame of the pier body to obtain the pier body;

[0044] Wherein, another part of the plurality of first anchor rods exposed on the outer base surface of the dam foot and another part of the plurality of second anchor rods exposed on the slope surface of the dam slope are both placed in the pier body;

[0045] Step 2

[0046] Building the board:

[0047] Embedding a portion of the plurality of third anchor rods into the top surface of the pier body, and exposing another portion of the plurality of third anchor rods from the top surface of the pier body;

[0048] Embed a portion of the plurality of fourth anchor rods into the dam slope surface above the pier body top surface, and expose another portion of the plurality of fourth anchor rods from the dam slope surface above the pier body top surface;

[0049] Then, a steel frame of the plate body is built above the top surface of the pier body and adjacent to the dam slope surface above the top surface of the pier body, and a second concrete material is poured into the steel frame of the plate body to obtain a plate body;

[0050] Wherein, another part of the third anchor rods exposed on the top surface of the pier body and another part of the fourth anchor rods exposed on the dam slope surface above the top surface of the pier body are both placed in the plate body;

[0051] Step 3:

[0052] Build several beams:

[0053] Embedding a portion of the plurality of fifth anchor rods into the top surface of the pier body, and exposing another portion of the plurality of fifth anchor rods from the top surface of the pier body;

[0054] Embed a portion of the plurality of sixth anchor rods into the other side of the plate body away from the dam slope, and expose another portion of the plurality of sixth anchor rods on the other side of the plate body away from the dam slope;

[0055] Then, a steel frame of the beam body is built above the top surface of the pier body and adjacent to the other side of the plate body away from the dam slope, and a second concrete material is poured into the steel frame of the beam body to obtain the beam body;

[0056] Among them, another part of the fifth anchor rods exposed on the top surface of the pier body and another part of the sixth anchor rods exposed on the other side surface of the plate body away from the dam slope are both placed in the beam body.

[0057] The reinforcement structure system of the dam body mentioned above has a simple structural form and is easy to operate. It can provide effective guarantees for construction speed and quality and can be used for emergency rescue and disaster relief projects with a short construction period. It utilizes the original dam body and, on the basis that the original dam body cannot be destroyed, adopts this construction method to minimize the disturbance to the original dam body, ensure the reinforcement effect, and ensure the stability of the dam body during construction.

[0058] Further, it includes step 1 and step 2, wherein, in step 2, a plate body and a plurality of beam bodies are constructed:

[0059] Embedding a portion of the plurality of third anchor rods into the top surface of the pier body, and exposing another portion of the plurality of third anchor rods from the top surface of the pier body;

[0060] Embed a portion of the plurality of fourth anchor rods into the dam slope surface above the pier body top surface, and expose another portion of the plurality of fourth anchor rods from the dam slope surface above the pier body top surface;

[0061] Embedding a portion of the plurality of fifth anchor rods into the top surface of the pier body, and exposing another portion of the plurality of fifth anchor rods from the top surface of the pier body;

[0062] Then, a steel frame of the plate body and the plurality of beam bodies is built above the top surface of the pier body and adjacent to the dam slope above the top surface of the pier body, and a second concrete material is poured to obtain the plate body and the plurality of beam bodies; the plate body and the plurality of beam bodies are an integrated reinforced concrete structure;

[0063] Among them, another part of the third anchor rods exposed on the top surface of the pier body and another part of the fourth anchor rods exposed on the dam slope surface above the top surface of the pier body are both placed in the plate body; another part of the fifth anchor rods exposed on the top surface of the pier body and another part of the sixth anchor rods exposed on the other side of the plate body away from the dam slope are both placed in the beam body.

[0064] Furthermore, the top surface of the pier body is located at the middle height or the middle-upper height of the dam body.

[0065] Furthermore, in step 1, the length of the plurality of first anchor rods embedded in the outer base of the dam foot is at least 0.5 m. A suitable embedding length is beneficial to improving the stability of the newly built reinforcement structure.

[0066] Furthermore, in step 1, the length of another portion of the plurality of first anchors exposed on the outer base surface of the plurality of first anchor dam feet is at least 0.5 m.

[0067] Furthermore, in step 1, the length of a plurality of the second anchor rods embedded in the dam slope surface is at least 0.5 m.

[0068] Furthermore, in step 1, the length of another portion of the plurality of first anchors exposed on the outer base surface of the plurality of first anchor dam feet is at least 0.5 m.

[0069] Further, a plurality of the first anchor rods are dispersedly arranged. Preferably, a plurality of the first anchor rods are evenly dispersedly arranged.

[0070] Further, a plurality of the second anchor rods are dispersedly arranged. Preferably, a plurality of the second anchor rods are evenly dispersedly arranged.

[0071] Furthermore, the plurality of third anchor rods are dispersedly arranged. Preferably, the plurality of third anchor rods are evenly dispersedly arranged.

[0072] Furthermore, the plurality of fourth anchor rods are dispersedly arranged. Preferably, the plurality of fourth anchor rods are evenly dispersedly arranged.

[0073] Further, the plurality of fifth anchor rods are dispersedly arranged. Preferably, the plurality of fifth anchor rods are evenly dispersedly arranged.

[0074] Furthermore, the plurality of the sixth anchor rods are dispersedly arranged. Preferably, the plurality of the sixth anchor rods are evenly dispersedly arranged.

[0075] Furthermore, in step 1, after a portion of the plurality of first anchor rods are embedded into the outer base of the dam foot, cement slurry is poured into the embedding holes to fix the anchor rods.

[0076] Furthermore, in step 1, after a portion of a plurality of the second anchor rods are embedded into the dam slope surface, cement slurry is poured into the embedding holes to fix the anchor rods.

[0077] Furthermore, in step 2, after a portion of the plurality of third anchor rods are embedded into the top surface of the pier body, cement slurry is poured into the embedding holes to fix the anchor rods.

[0078] Furthermore, in step 2, after a portion of the plurality of fourth anchor rods are embedded into the dam slope surface above the top surface of the pier body, cement slurry is poured into the embedding holes to fix the anchor rods.

[0079] Furthermore, in step 3, after a portion of the plurality of fifth anchor rods are embedded into the top surface of the pier body, cement slurry is poured into the embedding holes to fix the anchor rods.

[0080] Furthermore, in step 3, after a portion of the plurality of sixth anchor rods are embedded into the other side surface of the plate body away from the dam slope, cement slurry is poured into the embedding holes to fix the anchor rods.

[0081] Furthermore, in step 1, a layered pouring method is adopted in the process of pouring concrete material into the steel frame of the pier body.

[0082] Furthermore, in step 2, a layered pouring method is adopted when pouring concrete material into the steel frame of the plate body.

[0083] Furthermore, in step 3, a layered pouring method is adopted during pouring concrete material into the steel frame of the beam body. The layered pouring method can make the poured material evenly dispersed in the steel frame, which helps to improve the stability of the reinforced concrete.

[0084] Furthermore, in step 1, after pouring the first concrete material, geotextile covering and moisturizing maintenance are carried out in a timely manner.

[0085] Furthermore, in step 2, after pouring the second concrete material, geotextile covering and moisture retention maintenance are carried out in a timely manner.

[0086] Furthermore, in step 3, after pouring the second concrete material, geotextile covering and moisture retention maintenance are carried out in a timely manner.

[0087] Furthermore, in step 1, the process of constructing the pier body is to construct the pier body in sections along the length direction of the dam slope surface. The segmented construction can minimize the exposure time of the dam foundation and shorten the construction period. At the same time, it helps to grasp the overall stability of the pier body. Further, in step 1, the process of constructing the pier body is to construct the pier body in sections along the length direction of the dam slope surface, first from the middle section to both sides. This construction method can minimize the exposure time of the dam foundation and ensure the stability of the original dam body during the construction process. Further, in step 1, the process of constructing the pier body is to construct the pier body in sections along the length direction of the dam slope surface, and the embedding and setting steps of the first anchor rod and the second anchor rod in the process of constructing each section of the pier body are also carried out in sections.

[0088] Furthermore, sealant is filled between two adjacent pier sections to deal with the construction gap problem.

[0089] Furthermore, in step 2, the process of constructing the plate body is to construct the plate body in sections along the length direction of the dam slope. The sectioned construction can minimize the exposure time of the dam foundation and shorten the construction period. At the same time, it helps to grasp the overall stability of the pier. Further, in step 2, the process of constructing the plate body is to construct the plate body in sections along the length direction of the dam slope, and the length of each section of the plate body is the same as the length of each section of the pier body corresponding to the bottom of the plate body. Further, after completing a section of the pier body in step 1, you can start to build a section of the plate body on the upper part of the pier body.

[0090] Furthermore, during the construction of the pier body, an inclinometer tube is pre-buried in the pier body to monitor the deep displacement of the reinforced structure.

[0091] Furthermore, during the construction of the pier body, a seepage water pressure gauge is pre-buried in the pier body to monitor the fission condition of the reinforced structure.

[0092] Furthermore, each of the first anchor rods is a structural member made of steel bar material.

[0093] Furthermore, each of the second anchor rods is a structural member made of steel bars.

[0094] Furthermore, each of the third anchor rods is a structural member made of steel bar material.

[0095] Furthermore, each of the fourth anchor rods is a structural member made of steel bar material.

[0096] Furthermore, each of the fifth anchor rods is a structural member made of steel bar material.

[0097] Furthermore, each of the sixth anchor rods is a structural member made of steel bar material.

[0098] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0099] 1. The present invention provides a reinforcement structure system consisting of a pier body, a plate body and a plurality of beam bodies. The existence of the pier body effectively improves the stability of the dam body. The back-attached beam body and the plate body are pressed back on the pier body, which effectively improves the reinforcement effect. At the same time, the reinforcement structure system and the dam slope form a closed whole, which also enhances the anti-seepage property of the dam body. The reinforcement structure of the present invention has a good reinforcement effect on the dam body, has strong anti-slip stability, and timely reinforces the mortar-laid stone dam using limited construction space, thereby minimizing the disturbance to the original dam body. It has high feasibility for construction in special environments and specific conditions, and can also ensure the normal and safe operation of the dam body and its surrounding equipment. At the same time, the design of the beam body of the present invention effectively saves material consumption and reduces engineering workload while ensuring a good reinforcement effect, is convenient for construction operation, and has high economic rationality.

[0100] 2. The present invention provides a construction method for a dam body reinforcement structural system, which utilizes the original dam body. On the basis that the original dam body cannot be destroyed, this construction method is used to minimize the disturbance to the original dam body, ensure the reinforcement effect, and ensure the stability of the dam body during construction. The operation is simple, and effective guarantees can be provided for the construction speed and quality. At the same time, it can be used for emergency rescue and disaster relief projects with a short construction period.

[0101] 3. The present invention provides a construction method for a dam reinforcement structure system, which adopts a layered pouring and segmented construction reinforcement system. The segmented construction can minimize the exposure time of the dam foundation and shorten the construction period. At the same time, it helps to grasp the overall stability of the pier. Layered pouring can make the poured materials evenly dispersed in the steel frame, which helps to improve the stability of reinforced concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0102] Figure 1, a schematic cross-sectional view of the reinforcement structure system of the dam body of the present invention.

[0103] Figure 2 , Schematic diagram of the reinforcement structure system of Example 2.

[0104] 1- pier body; 2- plate body; 3- beam body; 4- first anchor rod; 5- second anchor rod; 6- dam body. DETAILED DESCRIPTION

[0105] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0106] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0107] Example 1

[0108] like Figure 1 As shown, a reinforcement structure system of a dam body includes a pier body 1, a plate body 2 and a plurality of beam bodies 3; the pier body 1, the plate body 2 and the plurality of beam bodies 3 are all reinforced concrete structures.

[0109] The bottom of the pier body 1 is connected to the outer base of the dam foot through a plurality of first anchor rods 4, and one side of the pier body 1 is connected to the dam slope through a plurality of second anchor rods 5. The top surface of the pier body 1 is lower than the top surface of the dam body 6; the top surface of the pier body 1 is located at the middle height of the dam slope.

[0110] The bottom surface of the plate body 2 is connected to the top surface of the pier body 1 through a plurality of third anchor rods; the thickness of the plate body 2 is less than the thickness of the pier body 1; one side surface of the plate body 2 is connected to the dam slope surface above the top surface of the pier body 1 through a plurality of fourth anchor rods;

[0111] The bottom surface of each beam body 3 is connected to the top surface of the pier body 1 through a plurality of fifth anchor rods. Each beam body 3 and the plate body 2 are an integrated structure, and a plurality of beam bodies 3 are spaced apart. The pier body 1, the plate body 2 and the dam slope surface form a closed whole. Among them, each first anchor rod 4 is a steel bar structure. Each second anchor rod 5 is a steel bar structure. Each third anchor rod is a steel bar structure. Each fourth anchor rod is a steel bar structure. Each fifth anchor rod is a steel bar structure.

[0112] The present invention provides a reinforcement structure system consisting of a pier body, a plate body and a plurality of beam bodies. The existence of the pier body effectively improves the stability of the dam body. The back-attached beam body and the plate body are back-pressed on the pier body, which effectively improves the reinforcement effect. At the same time, the reinforcement structure system and the dam slope surface form a closed whole, which also enhances the anti-seepage property of the dam body. The reinforcement structure of the present invention has a good reinforcement effect on the dam body, has strong anti-slip stability, and utilizes limited construction space to timely reinforce the mortar-laid stone dam, thereby minimizing the disturbance to the original dam body to the maximum extent. It has high construction feasibility for special environments and specific conditions, and can also ensure the normal and safe operation of the dam body and its surrounding equipment. At the same time, the design of the beam body of the present invention effectively saves material consumption and reduces engineering workload while ensuring a good reinforcement effect, is convenient for construction operation, and has high economic rationality.

[0113] Example 2

[0114] The leachate regulating pool dam of a certain city landfill site, the dam body 6 was originally a mortar-made stone structure. As the dam body 6 was built a long time ago, a large amount of rainwater scours the surface of the dam body 6 during the rainy season. At the same time, the east side of the dam body 6 is a rapids trough of the north flood interception ditch in the field, and the west side of the dam body 6 is a box culvert of the south flood interception ditch in the field. The drainage of the north and south flood interception ditches converges in the sedimentation tank at the foot of the dam. The flow rate during heavy rain is very large. The long-term scouring causes a large number of cavities on the surface and base of the dam body 6, resulting in the possibility of rupture, overall sliding or overturning of the dam body 6 at any time. The surrounding environment of the leachate regulating pool dam is extremely complex, especially the downstream of the dam body 6 is close to the leachate treatment plant and the landfill gas power plant. The leachate drainage pipelines buried under the dam foundation are intricate and all connected to the equipment in the plant.

[0115] Before construction, the water level in the leachate regulating tank will be lowered to below the safe liquid level; the leachate drainage pipes, sewage pipes and other pipelines within the construction scope of the new gravity pier will be relocated; the rapids trough of the north flood intercepting ditch in the original site will be diverted and modified, and the north flood intercepting ditch after diversion will be away from the construction scope of the new gravity pier, and connected to the existing box culvert in the leachate treatment plant on the south side of the original dam body 6; the box culvert of the south flood intercepting ditch in the original site will be diverted and modified, and the box culvert of the south flood intercepting ditch after diversion will be away from the construction scope of the new gravity pier, and connected to the existing box culvert in the leachate treatment plant on the south side of the original dam body 6.

[0116] The reinforcement structure system of the present invention is used for the above-mentioned mortar-stone dam, and the specific construction method includes the following steps:

[0117] Step 1: Build the pier:

[0118] The first anchor rod 4 is installed in the sedimentation tank at the junction of the original dam body 6 and the dam foot. Figure 1As shown, the first anchor rod 4 uses HRB400Φ25 steel bars, the borehole diameter is Φ=70mm, and the arrangement is 50cm×50cm. The first anchor rod 4 extends 3m below the bottom plate of the sedimentation tank and 1m beyond the top plate, and M30 cement slurry is poured into the hole for anchoring. After the construction of the first anchor rod 4 is completed, C20 concrete is backfilled in the sedimentation tank to seal it.

[0119] The second anchor 5 is constructed on the surface of the original dam body 6 slope. The second anchor 5 uses HRB400Φ25 steel bars, the borehole diameter is Φ=70mm, and it is arranged in a plum blossom shape with a spacing of 50cm×50cm. M30 cement slurry is poured into the hole for anchoring. The anchoring length is 50cm and the exposed length is 50cm.

[0120] like Figure 2 As shown, the newly built pier 1 is 64m long, 6m thick, 6m high at maximum, buried 1m below the ground, and the slopes at both ends of the pier top are made into steps, and C25 concrete is used for pouring. The newly built pier 1 is divided into 6 sections from west to east, of which the first section is 9m long, the second to fifth sections are 12m long, and the sixth section is 7m long. The new pier 1 is constructed in three times, first the third and fourth sections, then the second and fifth sections, and finally the first and sixth sections. Minimize the exposure time of the dam foundation to ensure the stability of the original dam body 6 during the construction process. The concrete of the newly built pier 1 is poured in sections and layers. Each section of the pier 1 is poured three times. After the pouring is completed, the geotextile is covered and moisturized in time. The construction joints between the two adjacent sections of the newly built pier 1 are well treated, and the construction joints are filled with high modulus polyurethane sealant. A layer of The anti-cracking steel mesh has a cooling water pipe inside. The cooling water pipe uses a DN32 steel pipe and is divided into 3 longitudinal layers and 4 vertical layers.

[0121] Step 2: Build the plate and beam

[0122] A plate body 2 and a plurality of beam bodies 3 are constructed on the top of the pier body 1. The plate body 2 and the plurality of beam bodies 3 are an integrated reinforced concrete structure, referred to as a beam-slab. Figure 2 As shown, the beam body 3 is 75cm high and 50cm wide, and is set every 6m. The thickness of the beam body 3 is 0.3m, and C30 reinforced concrete is used for pouring. The length of each construction segment of the new back-attached beam and slab is consistent with that of the pier body 1. After the concrete pouring of each section of the pier body 1 is completed, the corresponding upper back-attached beam and slab steel bars can be tied. Anchor bars are connected between the new back-attached beam and slab and the surface of the original dam body 6. The new back-attached beam and slab concrete is poured in sections and layers. Each section of the back-attached beam and slab concrete is poured twice. After the pouring is completed, the geotextile is covered and moisturized in time.

[0123] During and after the construction, the dam body 6 during the operation period will continue to be monitored through pre-buried and installed monitoring facilities, and the monitoring data will be collected and analyzed to better understand the reinforcement effect of the dam body 6.

[0124] a. Pre-embed three inclinometer tubes in the newly built pier 1 to monitor the deep displacement of the reinforced structure.

[0125] b. Pre-embed three seepage water pressure gauges in the foundation of the newly built pier 1 to monitor the fission of the reinforced structure.

[0126] c. Install two new GNSS monitoring stations on the east and west shoulders of the original dam body 6. Combined with the two GNSS monitoring stations installed on the dam top, they jointly monitor the surface displacement of the original dam body 6 and dam shoulders, and the surface displacement and settlement of the reinforced structure.

[0127] The present invention fully considers the extremely complex environment around the leachate regulating pool of the urban landfill, and timely reinforces the masonry dam in danger by reasonable planning and layout, creating construction conditions, and using limited construction space, and has high feasibility for construction under special environments and specific conditions. While meeting the requirements of dam body monitoring, stability analysis, and risk assessment results, the present invention innovatively uses a newly built "gravity pier + back-attached beam-slab" structure to reinforce the masonry dam, so that the newly built gravity pier, back-attached beam-slab and the original dam body form a closed whole, which fully strengthens the stability and impermeability of the original dam body, while saving the amount of materials such as concrete, reducing the amount of engineering, facilitating construction operations, and having high economic rationality.

[0128] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction method for a dam reinforcement structure system, characterized in that: The following steps are involved: Step 1, constructing a pier body (1): embedding a portion of a plurality of first anchor rods (4) into an outer base of the dam foot, and exposing another portion of the plurality of first anchor rods (4) on the outer base surface of the dam foot; Embedding a portion of the plurality of second anchor rods (5) into the dam slope surface, with another portion of the plurality of second anchor rods (5) exposed outside the dam slope surface; Then, a steel frame of the pier body (1) is built above the outer base of the dam foot and close to the dam slope surface, and a first concrete material is poured into the steel frame of the pier body (1) to obtain the pier body (1); The other part of the plurality of first anchor rods (4) exposed on the outer base surface of the dam foot and the other part of the plurality of second anchor rods (5) exposed on the slope surface of the dam slope are both placed inside the pier body (1); Step 2, constructing a plate body (2) and a plurality of beam bodies (3); The bottom of the pier body (1) is connected to the outer base of the dam foot, one side of the pier body (1) is connected to the slope of the dam, and the top surface height of the pier body (1) is less than the top surface height of the dam body (6); The bottom surface of the plate body (2) is connected to the top surface of the pier body (1); the thickness of the plate body (2) is less than the thickness of the pier body (1); and one side surface of the plate body (2) is connected to the dam slope surface above the top surface of the pier body (1); The bottom surface of each beam body (3) is connected to the top surface of the pier body (1), and one side surface of each beam body (3) is connected to the side surface of the plate body (2) away from the dam slope. A plurality of beam bodies (3) are distributed at intervals; the pier body (1), the plate body (2) and the dam slope surface form a closed whole; The bottom of the pier body (1) is connected to the outer base of the dam foot via a plurality of first anchor rods (4). A side surface of the pier body (1) is connected to the dam slope surface via a plurality of second anchor rods (5), and a bottom surface of the plate body (2) is connected to the top surface of the pier body (1) via a plurality of third anchor rods. One side surface of the plate body (2) is connected to the dam slope surface above the top surface of the pier body (1) via a plurality of fourth anchor rods. The bottom surface of each beam body (3) is connected to the top surface of the pier body (1) via a plurality of fifth anchor rods. One side surface of each of the beam bodies (3) is connected to the other side surface of the plate body (2) away from the dam slope via a plurality of sixth anchor rods.

2. The construction method of the reinforcement structure system of the dam body according to claim 1, characterized in that: The pier body (1) is a reinforced concrete structure; and / or the plate body (2) is a reinforced concrete structure; And / or each of the beam bodies (3) is a reinforced concrete structure.

3. The construction method of the reinforcement structure system of the dam body according to claim 1 is characterized in that: The beam body (3) and the plate body (2) are integrated structural components.

4. The construction method of the reinforcement structure system of the dam body according to claim 1, characterized in that: In step 2, the specific steps of constructing the plate body (2) and the plurality of beam bodies (3) are as follows: Step S1, embedding a portion of a plurality of third anchor rods into the top surface of the pier body (1), with another portion of the plurality of third anchor rods exposed on the top surface of the pier body (1); Embedding a portion of the plurality of fourth anchor rods into the dam slope surface above the top surface of the pier body (1), with another portion of the plurality of fourth anchor rods exposed from the dam slope surface above the top surface of the pier body (1); Then, a steel frame of the plate body (2) is built above the top surface of the pier body (1) and on the dam slope surface immediately above the top surface of the pier body (1), and a second concrete material is poured into the steel frame of the plate body (2) to obtain the plate body (2); The other part of the third anchor rods exposed on the top surface of the pier body (1) and the other part of the fourth anchor rods exposed on the dam slope surface above the top surface of the pier body (1) are both placed inside the plate body (2); Step S2, embedding a portion of the plurality of fifth anchor rods into the top surface of the pier body (1), with another portion of the plurality of fifth anchor rods exposed on the top surface of the pier body (1); Embedding a portion of the plurality of sixth anchor rods into the other side of the plate body (2) away from the dam slope, so that another portion of the plurality of sixth anchor rods is exposed on the other side of the plate body (2) away from the dam slope; Then, a steel frame of the beam body (3) is built above the top surface of the pier body (1) and adjacent to the other side of the plate body (2) away from the dam slope, and a second concrete material is poured into the steel frame of the beam body (3) to obtain the beam body (3); The other part of the fifth anchor rods exposed on the top surface of the pier body (1) and the other part of the sixth anchor rods exposed on the other side surface of the plate body (2) away from the dam slope are both placed in the beam body (3).

5. The construction method of the reinforcement structure system of the dam body according to claim 1, characterized in that: In step 2, the specific steps of constructing the plate body (2) and the plurality of beam bodies (3) are as follows: Embedding a portion of the plurality of third anchor rods into the top surface of the pier body (1), with another portion of the plurality of third anchor rods exposed on the top surface of the pier body (1); Embedding a portion of the plurality of fourth anchor rods into the dam slope surface above the top surface of the pier body (1), with another portion of the plurality of fourth anchor rods exposed from the dam slope surface above the top surface of the pier body (1); Embedding a portion of the plurality of fifth anchor rods into the top surface of the pier body (1), with another portion of the plurality of fifth anchor rods exposed outside the top surface of the pier body (1); Then, a steel frame of a plate body (2) and a plurality of beam bodies (3) is constructed above the top surface of the pier body (1) and on the dam slope surface immediately above the top surface of the pier body (1), and a second concrete material is poured to obtain the plate body (2) and the plurality of beam bodies (3); the plate body (2) and the plurality of beam bodies (3) are an integrated reinforced concrete structure; The other part of the third anchor rods exposed on the top surface of the pier body (1) and the other part of the fourth anchor rods exposed on the dam slope surface above the top surface of the pier body (1) are both placed in the plate body (2); the other part of the fifth anchor rods exposed on the top surface of the pier body (1) and the other part of the sixth anchor rods exposed on the other side surface of the plate body (2) away from the dam slope are both placed in the beam body (3).

6. The construction method of the reinforcement structure system of the dam body according to claim 1, characterized in that: In the step 1, a layered pouring method is adopted in the process of pouring concrete material into the steel frame of the pier body (1); And / or in the step 2, a layered pouring method is adopted in the process of pouring the concrete material into the steel frame of the plate body (2); And / or in the step 2, a layered pouring method is adopted when pouring concrete material into the steel frame of the beam body (3).

7. The construction method of the reinforcement structure system of the dam body according to claim 1, characterized in that: In step 1, the process of constructing the pier body (1) is to construct the pier body (1) in sections along the length direction of the dam slope surface, starting from the middle section and then constructing towards both sides.

8. The construction method of the reinforcement structure system of the dam body according to any one of claims 1, 4 to 7, characterized in that: In step 2, the process of constructing the plate body (2) is to construct the plate body (2) in sections along the length direction of the dam slope, and the length of each section of the plate body (2) is the same as the length of each section of the pier body (1) corresponding to the bottom of the plate body (2).

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