A crack control structure for ultra-long concrete structures
By incorporating stress relief grooves, corrugated plates, and steel mesh into ultra-long concrete structures, stress is dispersed and offset, thus solving the problem of uncontrollable cracking in ultra-long concrete structures and improving crack controllability and structural durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中建五局第四建设有限公司
- Filing Date
- 2025-08-12
- Publication Date
- 2026-06-30
Smart Images
Figure CN224431692U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, and in particular to a crack control structure for ultra-long concrete structures. Background Technology
[0002] During construction and use, ultra-long concrete structures are prone to cracking due to various factors such as concrete shrinkage, temperature changes, and structural constraints, and the location of these cracks is often uncontrollable. Cracks not only affect the structure's appearance and durability, but in harsh environments, they can also accelerate concrete carbonation and steel reinforcement corrosion, threatening structural safety. Utility Model Content
[0003] To address the problem of uncontrollable cracks in ultra-long concrete structures as described in the background art, this invention proposes a crack control structure for ultra-long concrete structures.
[0004] The technical solution of this utility model is: a crack control structure for an ultra-long concrete structure, comprising two adjacent ultra-long concrete structures, with a stress relief groove reserved between the two ultra-long concrete structures.
[0005] The bottom of the stress relief trench is provided with a corrugated plate extending along its length. The crests and troughs of the corrugated plate extend from left to right. The left and right ends of the corrugated plate are fixedly connected to the ultra-long concrete structures on the left and right sides, respectively.
[0006] The corrugated plate has two steel mesh panels spaced apart on the left and right. The two steel mesh panels are fixedly connected to two extra-long concrete structures on the left and right sides respectively, and a through joint is formed between the two steel mesh panels.
[0007] The stress relief trench is fitted with an inner steel plate with an opening at the top and in the shape of a groove. The left and right sides of the inner steel plate are respectively attached to the end faces of the extra-long concrete structure on the left and right sides of the stress relief trench, and the bottom of the inner steel plate is against two steel mesh.
[0008] The bottom of the inner steel plate and the corrugated plate are filled with post-cast concrete.
[0009] Preferably, the bottom of the inner steel plate is an arc-shaped bottom plate that bulges upward in the middle, and the highest point of the arc-shaped bottom plate is located directly above the through joint between the two steel meshes on the left and right.
[0010] Preferably, the bottom of the arc-shaped base plate is fixedly provided with two connecting plates that extend in the front-to-back direction and are spaced apart from each other on the left and right, and both connecting plates are inserted into the through seam.
[0011] Preferably, the curved base plate has several insertion holes spaced apart along its length and open at both ends;
[0012] The bottom of the inner steel plate is covered with a rear-mounted base plate of the same width and length. The rear-mounted base plate is a flat plate structure and rests against the top of the arc-shaped base plate.
[0013] The gaps between the left and right ends of the rear-mounted base plate and between the left and right ends of the curved base plate are filled with post-cast concrete.
[0014] Preferably, the bottom of the rear-mounted base plate is fixedly connected with several insert rods spaced apart front and rear, with the end of the insert rod away from the rear-mounted base plate passing through the insertion hole and extending into the through gap.
[0015] Preferably, the top of the inner steel lining plate is provided with a removable filter screen.
[0016] Preferably, the end of the ultra-long concrete structure facing the stress relief trench is a right-angled trapezoidal structure that is narrower at the top and wider at the bottom;
[0017] The left and right side plates of the inner lining steel plate include a first side plate section and a second side plate section connected sequentially from bottom to top. The first side plate section is set vertically, and the second side plate section is set obliquely upward from the center of the stress relief groove to both sides.
[0018] The filter screen is laid between the two second side panel sections on the left and right, and the width of the filter screen on the left and right is greater than the minimum width between the two second side panel sections.
[0019] The advantages of this invention are as follows: The stress transmitted to the corrugated plate is partially converted and dispersed to multiple areas within the subsequent concrete due to the plate's own corrugated structure. When the stress in the subsequent concrete is transmitted upwards, part of it is offset by the layers of subsequent concrete, corrugated plate, reinforcing mesh, bottom of the inner steel lining plate, and subsequent base plate; the remaining part pushes the curved base plate and subsequent base plate to undergo certain deformation. Even when the stress is excessive, the crack location can be controlled within the area above and below the through-crack in the stress relief groove, keeping the crack occurrence within a controllable range, reducing potential losses from water leakage at the crack, and thus reducing subsequent maintenance costs. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the main structure of Example 1;
[0022] Figure 2 for Figure 1A three-dimensional structural diagram of the inner steel lining plate;
[0023] Figure 3 for Figure 1 A three-dimensional structural diagram of the rear-mounted base plate;
[0024] In the diagram, 1. Extra-long concrete structure, 2. Stress relief trench, 3. Corrugated plate, 4. Steel mesh, 5. Inner steel lining plate, 501. Arc-shaped base plate, 502. Connecting plate, 503. Insertion hole, 504. First side plate section, 505. Second side plate section, 6. Post-installed base plate, 601. Post-installed base plate body, 602. Insert rod, 7. Post-poured concrete, 8. Filter screen. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Example 1: A crack control structure for ultra-long concrete structures, such as Figure 1 As shown, it includes two adjacent ultra-long concrete structures 1, with a stress relief trench 2 reserved between the two ultra-long concrete structures 1.
[0027] The bottom of the stress relief trench 2 is provided with a corrugated plate 3 extending along its length. The crests and troughs of the corrugated plate 3 extend from left to right. The left and right ends of the corrugated plate 3 are fixedly connected to the extra-long concrete structures 1 on the left and right sides, respectively. The corrugated plate 3 is designed so that when stress occurs, a portion of the lateral stress can be converted into compressive force in the vertical direction.
[0028] Two steel mesh panels 4 are arranged at intervals on the left and right sides above the corrugated plate 3. The two steel mesh panels 4 are fixedly connected to two extra-long concrete structures 1 on the left and right sides respectively, and a through gap is formed between the two steel mesh panels 4.
[0029] A grooved steel lining plate 5 with an open top is inserted into the stress relief trench 2. The left and right sides of the steel lining plate 5 are respectively attached to the end faces of the extra-long concrete structure 1 on the left and right sides of the stress relief trench 2. Post-cast concrete 7 is filled between the bottom of the steel lining plate 5 and the corrugated plate 3.
[0030] To improve the deformation capacity of the bottom of the inner lining steel plate 5, such as Figure 2As shown, the bottom of the inner steel plate 5 is an arc-shaped bottom plate 501 that bulges upward in the middle. The highest point of the arc-shaped bottom plate 501 is located directly above the through joint between the two steel mesh sheets 4 on the left and right. The left and right ends of the arc-shaped bottom plate 501 abut against the two steel mesh sheets 4 respectively.
[0031] In order to improve the connection strength between the arc-shaped base plate 501 and the post-cast concrete 7, as well as the resistance of the two steel meshes 4 to the through joint in the middle, in this embodiment, two connecting plates 502 extending in the front-back direction and spaced apart in the left and right directions are fixedly provided at the bottom of the arc-shaped base plate 501, and both connecting plates 502 are inserted into the through joint.
[0032] To improve the drainage flow within stress relief ditch 2, such as Figure 1 As shown, the bottom of the inner steel plate 5 is covered with a rear-mounted base plate 6 of the same width and length as the inner steel plate 5. The rear-mounted base plate 6 is a flat plate structure and abuts against the top of the arc-shaped base plate 501.
[0033] To ensure that the post-cast concrete 7 can rise above the curved base plate 501 during pouring, thereby improving the structural strength of the connection between the curved base plate 501 and the post-installed base plate 6, such as... Figure 1 , Figure 2 and Figure 3 As shown, the arc-shaped base plate 501 has several holes 503 that are spaced apart along its length and are open from top to bottom. The gaps between the left and right ends of the base plate 6 and the left and right ends of the arc-shaped base plate 501 are filled with post-cast concrete 7.
[0034] To further improve the connection strength between the post-installed base plate 6 and the post-cast concrete 7, such as Figure 1 and Figure 3 As shown, the bottom of the rear mounting base plate 6 is fixedly connected with several insert rods 602 arranged at intervals. The end of the insert rod 602 away from the rear mounting base plate 6 passes through the insertion hole 503 and extends into the through gap.
[0035] In order to concentrate stress in the area containing the corrugated plate 3, the post-cast concrete 7, the curved base plate 501, and the post-installed base plate 6, such as Figure 1 and Figure 2 As shown, the end of the extra-long concrete structure 1 facing the stress relief trench 2 is a right-angled trapezoidal structure that is narrower at the top and wider at the bottom. Correspondingly, the left and right side plates of the inner steel plate 5 include a first side plate segment 501 and a second side plate segment 502 connected sequentially from bottom to top. The first side plate segment 501 is vertically arranged, and the second side plate segment 502 extends obliquely upward from the center of the stress relief trench 2 to both sides.
[0036] In order to filter out large particles of debris that fall into stress relief trench 2, such as Figure 1As shown, a filter screen 8 is laid on the top between the two second side plate segments 502, and the left and right width of the filter screen 8 is greater than the minimum width between the two second side plate segments 502.
[0037] Working principle: When stress is generated on the ultra-long concrete structure 1 during use, the ultra-long concrete structure 1 will transfer the stress to the middle and lower part of the stress relief groove 2 where the corrugated plate 3, the post-cast concrete 7, the arc-shaped bottom plate 501, and the post-installed bottom plate 6 are located, so as to prevent large deformation in the area inside the inner steel plate 5 where there is no post-cast concrete 7.
[0038] The stress transmitted to the corrugated plate 3 is partially converted and dispersed to multiple areas within the post-cast concrete 7 due to the corrugated plate 3's own corrugated structure. When the stress in the post-cast concrete 7 is transmitted upward, part of it is offset by the post-cast concrete 7, corrugated plate 3, curved base plate 501, and post-installed base plate 6 layer by layer, while part of it pushes the curved base plate 501 and post-installed base plate 6 to undergo certain deformation. Even if the stress is too great, the crack location can be controlled in the area above and below the through crack in the stress relief groove 2, so that the crack location is within a controllable range, reducing the potential losses caused by water leakage at the crack and thus reducing the later maintenance costs.
[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A crack control structure for ultra-long concrete structures, characterized in that: It includes two adjacent super-long concrete structures (1), and a stress relief trench (2) is reserved between the two super-long concrete structures (1); The bottom of the stress relief trench (2) is provided with a corrugated plate (3) extending along its length. The crests and troughs of the corrugated plate (3) extend from left to right. The left and right ends of the corrugated plate (3) are fixedly connected to the ultra-long concrete structures (1) on the left and right sides, respectively. Two steel mesh panels (4) are provided above the corrugated plate (3) with left and right spacing. The two steel mesh panels (4) are fixedly connected to the two extra-long concrete structures (1) on the left and right sides respectively. A through gap is formed between the two steel mesh panels (4). The stress relief trench (2) is fitted with an inner steel plate (5) with an upper opening and a groove shape. The left and right sides of the inner steel plate (5) are respectively attached to the end faces of the ultra-long concrete structure (1) on the left and right sides of the stress relief trench (2). The bottom of the inner steel plate (5) is against two steel meshes (4). The bottom of the inner steel plate (5) and the corrugated plate (3) are filled with post-cast concrete (7).
2. The crack control structure for ultra-long concrete structures as described in claim 1, characterized in that: The bottom of the inner steel plate (5) is an arc-shaped bottom plate (501) that bulges upward in the middle. The highest point of the arc-shaped bottom plate (501) is located directly above the through joint between the two steel meshes (4) on the left and right.
3. The crack control structure for ultra-long concrete structures as described in claim 2, characterized in that: The bottom of the arc-shaped base plate (501) is fixedly provided with two connecting plates (502) that extend in the front-back direction and are spaced apart on the left and right. Both connecting plates (502) are inserted into the through seam.
4. The crack control structure for ultra-long concrete structures as described in claim 3, characterized in that: The curved base plate (501) has several insertion holes (503) that are spaced apart along its length and are open from top to bottom; The bottom of the inner steel plate (5) is covered with a rear-mounted base plate (6) of the same width and length as it. The rear-mounted base plate (6) is a flat plate structure and abuts against the top of the arc-shaped base plate (501). The gaps between the left and right ends of the rear-mounted base plate (6) and the left and right ends of the arc-shaped base plate (501) are filled with post-cast concrete (7).
5. The crack control structure for an ultra-long concrete structure as described in claim 4, characterized in that: The bottom of the rear mounting base plate (6) is fixedly connected with several insert rods (602) spaced apart front and back. The end of the insert rod (602) away from the rear mounting base plate (6) passes through the insertion hole (503) and extends into the through gap.
6. A crack control structure for ultra-long concrete structures as described in any one of claims 1-5, characterized in that: The top of the inner steel plate (5) is equipped with a removable filter screen (8).
7. The crack control structure for an ultra-long concrete structure as described in claim 6, characterized in that: The end of the ultra-long concrete structure (1) facing the stress relief trench (2) is a right-angled trapezoidal structure that is narrow at the top and wide at the bottom; The left and right side plates of the inner steel plate (5) include a first side plate section (504) and a second side plate section (505) connected sequentially from bottom to top. The first side plate section (504) is set vertically, and the second side plate section (505) is set obliquely upward from the center of the stress relief groove (2) to both sides. The filter screen (8) is laid between the two second side plate sections (505) on the left and right sides. The width of the filter screen (8) on the left and right sides is greater than the minimum width between the two second side plate sections (505).