Toughening type fabricated concrete pipe ditch dry type connection joint device

Abstract

The utility model provides a toughened fabricated concrete pipe ditch dry-type connection node device, which adopts a dry-type design to effectively avoid the inherent problems of tedious construction procedures and long period of a wet-type connection node, adopts a reinforcement cage wrapped with a concrete body, and effectively improves the toughness of the connection node through a cage-shaped reinforcement frame, so that the construction efficiency is improved, and the service life of the connection node is prolonged. The connecting joint structure adopts a connecting bolt connecting mode, through holes are formed in the two ends of the connecting joint adaptive to the connecting mode, the through holes penetrate through the inner area of the steel bar frame, and the through hole positions where stress is concentrated are effectively reinforced through the steel bars; the operation sinking grooves are formed in the positions matched with the through holes so that the connecting screws can be conveniently installed, taken out or fastened and loosened, structural damage to the connecting joints is effectively avoided, strength loss is avoided, and the problems that a common dry type connecting joint device is poor in toughness and prone to damage are effectively solved through the design.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building construction, and more particularly to a toughened assembly type concrete pipe trench dry type connecting joint device. BACKGROUND

[0002] With the acceleration of urbanization, power, communication, gas, water supply and drainage pipelines gradually change from open laying to underground laying, and underground cable trenches, gas pipe trenches and comprehensive pipe galleries have become an important part of modern urban infrastructure. This effectively solves the problems of traditional pipeline layout disorder and maintenance difficulty, and significantly improves the utilization rate of urban space and environmental aesthetics.

[0003] Assembly type concrete pipe trenches have become the mainstream construction scheme due to their advantages of factory prefabrication and on-site rapid assembly. In the assembly type concrete underground pipe trench structure, the performance of the node connecting part directly determines the overall bearing capacity and durability of the structure. At present, two types of technologies are mainly used for the connecting joints of assembly type concrete pipe trenches: wet connection (such as sleeve grouting) and dry connection (such as bolt connection).

[0004] Wet connection realizes structure continuity by filling the gap between prefabricated components with grouting material, which can ensure high integrity, but has problems such as complex construction process, long maintenance period (waiting for grouting material to solidify), high environmental temperature sensitivity, etc., which seriously restricts construction efficiency. While dry bolt connection has the advantages of convenient and efficient construction, but its rigid connection method leads to insufficient node toughness, which is prone to brittle failure under dynamic load, and has safety hazards, making it difficult to meet the long-term use requirements under complex working conditions.

[0005] In summary, the wet connection and dry connection in the prior art have a contradiction between "construction efficiency" and "structural performance", and how to balance rapid construction and node toughness has become a difficult problem to be solved in the field of assembly type concrete pipe trench technology. CONTENT OF THE UTILITY MODEL

[0006] The technical problem to be solved by the utility model is that the connecting joints of existing assembly type concrete pipe trenches have the technical problem of being difficult to balance construction time and structural quality.

[0007] To solve the above problems, the utility model provides a kind of toughened assembly type concrete pipe trench dry type connecting node device, including pre -buried reinforcement frame and the concrete body covered in the reinforcement frame outside, the reinforcement frame is cuboid cage, the both ends of the outer contour of the concrete body are cuboid, the both ends of the concrete body are provided with the through -hole for installing and the connecting screw rod of the concrete pipe trench piece to be connected butting, the through -hole is located in the concrete body area in reinforcement frame, the position close to both ends of the concrete body side is provided with the recessed operation sink inward, the operation sink is communicated with the end portion of the through -hole, for by the operation sink fastening or loosening the connecting screw rod passing through the through -hole.

[0008] The utility model provides a kind of dry type concrete pipe trench connecting node design, first adopt dry type design effectively avoid wet type connecting node inherent construction process cumbersome, long problem, this dry type connecting node adopts the reinforcement cage design of outer package concrete body, effectively promote the toughness of connecting node by cage-shaped reinforcement frame, ensure that connecting node is not prone to fracture under stress, adapt to the connecting mode of the connecting bolt of the connecting node structure, adapt to the connecting mode and set through -hole in both ends of connecting node, through -hole passes through the inner area of reinforcement frame, effectively through the reinforcement stress concentrated through -hole position, cooperate operation sink and be conveniently loaded into or fastening loosening connecting screw rod, and effectively avoid the structural damage to connecting node avoid the loss of strength, the design effectively avoids the toughness of general dry type connection and the problem of easy damage.

[0009] As a preferred scheme, the reinforcement frame includes uniformly arranged through-length bars at a predetermined distance, each through-length bar is connected to each other by a plurality of longitudinal bars, and the longitudinal bars are connected and fixed to four top corners and a frame of the through-length bars. This design optimizes the structure of the reinforcement frame, which mainly includes through-length bars and longitudinal bars connected to each through-length bar. Some longitudinal bars are fixed to the edge or approximate end position of the through-length bar, forming a square frame structure. The reinforcement frame structure is simple and firm.

[0010] As a preferred scheme, the operation sink is located between two adjacent through-length bars at the corresponding position, and the longitudinal bars avoid the concrete body region where the operation sink is located. This design optimizes the structure of the operation sink in the above design, and the through-length bars and longitudinal bars avoid the operation sink. Thus, the strength of the surrounding concrete structure of the operation sink can be optimized to ensure the integrity of the operation sink structure.

[0011] As a preferred solution, the two ends of the longitudinal rib are hook-shaped, connected with the through rib by the hook-shaped end structure, and the longitudinal rib and the through rib connected therewith are connected and fixed by the binding rope structure. This design optimizes the longitudinal rib and the through rib on the basis of the above-mentioned steel frame structure, and sets a hook-shaped structure at the two ends of the longitudinal rib, which hooks the through rib and is fixed by cooperating with the iron wire and other binding structures.

[0012] As a preferred solution, the steel frame includes spiral spring-shaped stirrups at its two ends, which are wrapped outside the through hole, and the spiral spring-shaped stirrups are connected and fixed with the through rib at the corresponding position. This design further optimizes the through hole in the concrete body. The concrete around the through hole is a stress concentration area. The spiral spring-shaped stirrups set on the periphery of this area can effectively constrain the concrete in the surrounding area and effectively improve the carrying capacity of the connecting joint.

[0013] As a preferred solution, the steel frame further includes three-folded inclined strut ribs connected at its two ends, which include a horizontal rib part and inclined rib parts integrally connected at the two ends of the horizontal rib part. The horizontal rib part is fixed with the through rib at the end of the steel frame, and the end of the inclined rib part is fixed with another through rib on the opposite side of the through rib, for strengthening the two ends of the steel frame. This design is the same as the above-mentioned spiral spring-shaped stirrup. The three-folded inclined strut rib structure is set in the key area of stress concentration of the connecting joint device, which can effectively avoid the diagonal cracks on the connecting surface at the two ends of the joint device under load.

[0014] As a preferred solution, the cross section of the operating slot is trapezoidal, the position of the through hole communicating with the operating slot is located on the inner surface of the slot with a longer base, and the inner surface of the slot is a semicircular surface. The through hole is an arc hole for installing an arc screw. This design proposes a preferred operating slot design, which uses an arc hole to adapt to an arc screw. This screw distribution design is better adapted to the stress mode of the cable trench connected at both ends, and a smaller diameter through hole can be used for installation, which causes less damage to the structural integrity of the connecting joint device. The operating slot with a trapezoidal cross section is used, and the size of the longitudinal section of the operating slot decreases from the lower base to the upper base of the trapezoidal cross section, and the longitudinal section shape is a semicircular surface. One side of the profile is a continuous arc curve, and the opening of the through hole on the inner surface of the operating slot is located on the side with the largest longitudinal section area. Such an operating slot structure minimizes the damage to the integrity of the concrete body while ensuring the basic function of installing the screw.

[0015] As a preferred scheme, the operation groove is cuboid, and the through hole is a straight hole for mounting a linear screw rod. This design provides another preferred through hole and operation groove design, a straight hole design matched with a cuboid operation groove, and the connection operation of the screw rod is more convenient, the overall shape requirement is relatively low, the accuracy requirement of the mold is lower, and the connection node cost is lower than the above-mentioned arc hole design.

[0016] As a preferred scheme, the concrete body is a hybrid fiber concrete body. This design provides a preferred concrete material selection design, adopts hybrid fiber concrete, and further improves the toughness of the concrete body itself. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided.

[0018] Figure 2 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided.

[0019] Figure 3 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided. Figure 2 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided.

[0020] Figure 4 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided.

[0021] Figure 5 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided. Figure 4 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided.

[0022] Figure 6 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided. Figure 5 An overall external structure schematic diagram of the toughened assembly type concrete pipe trench dry type connection node device is provided.

[0023] Among them, Figures 1-6 Among them:

[0024] 1, concrete body; 2, steel reinforcement frame; 2-1, through length reinforcement; 2-2, longitudinal reinforcement; 2-3, spiral spring-shaped stirrup; 2-4, three-folded inclined strut; 3, operation groove; 4, through hole; 5, connecting screw rod; 6, grid fiber. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, purposes and effects achieved by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0026] Before providing a detailed explanation of the working principle of this utility model, further clarification is needed regarding its description: In this description, terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] refer to Figures 1-6 The following examples illustrate this. Figure 1 A schematic diagram of the overall external structure of a toughened prefabricated concrete trench dry connection node device provided by this utility model. Figure 2 A front cross-sectional structural schematic diagram of a toughened prefabricated concrete trench dry connection node device provided by this utility model. Figure 3 for Figure 2 A side sectional view of the toughened prefabricated concrete trench dry connection node device. Figure 4 A front cross-sectional structural schematic diagram of another toughened prefabricated concrete trench dry connection node device provided by this utility model. Figure 5 for Figure 4 A side sectional view of the toughened prefabricated concrete trench dry connection node device. Figure 6 for Figure 5 A schematic diagram of the internal frame structure of a medium-toughened prefabricated concrete trench dry connection node device.

[0029] The toughened dry-type connecting joint device of the fabricated concrete trench provided in the embodiment comprises a pre-buried steel reinforcement frame 2 and a concrete body 1 wrapped outside the steel reinforcement frame 2, the steel reinforcement frame 2 is in the shape of a cuboid cage, the two ends of the outer contour of the concrete body 1 are in the shape of a cuboid, the two ends of the concrete body 1 are provided with through holes 4 for mounting connecting screws 5 for butting with the concrete trench parts to be connected, the through holes 4 are located in the region of the concrete body 1 inside the steel reinforcement frame 2, the side of the concrete body 1 near the two ends is provided with an inwardly recessed operation groove 3, the operation groove 3 is in communication with the end of the through hole 4, and the connecting screw 5 passing through the through hole 4 is fastened or loosened through the operation groove 3.

[0030] The utility model provides a kind of dry-type concrete trench connecting joint design, first, effectively avoid the inherent construction process of wet-type connecting joint cumbersome, long cycle problem using dry-type design, the steel reinforcement cage design of this dry-type connecting joint is wrapped with concrete body 1, the toughness of connecting joint is effectively improved by cage-shaped steel reinforcement frame 2, ensure that connecting joint is not prone to fracture under stress, adapt to the connecting mode of connecting bolt for the connecting node structure, adapt to the connecting mode and set through hole 4 in the two ends of connecting node, through hole 4 passes through the inner region of steel reinforcement frame 2, effectively through the steel reinforcement stress concentrated through hole 4 position, cooperate with the operation groove 3 of through hole 4 position and be convenient to load or fasten loosening connecting screw 5, and effectively avoid the structural damage to connecting node avoid the loss of strength, the design effectively avoids the problem of poor toughness of general dry-type connection and easy to damage.

[0031] In the technical scheme provided by the embodiment, the steel reinforcement frame 2 includes through-length reinforcements 2-1 uniformly arranged at intervals with a preset distance, each through-length reinforcement 2-1 is connected to each other by a plurality of longitudinal reinforcements 2-2, and the longitudinal reinforcements 2-2 are connected and fixed to the four top corners and the frame of the through-length reinforcements 2-1. The design optimizes the structure of the steel reinforcement frame 2, which mainly includes the through-length reinforcements 2-1 and the longitudinal reinforcements 2-2 connected to each of the through-length reinforcements 2-1, and part of the longitudinal reinforcements 2-2 are fixed to the end or the approximate end of the through-length reinforcements 2-1, forming a structure similar to a square frame. The steel reinforcement frame 2 is simple in structure and firm in structure.

[0032] In the technical scheme provided by the embodiment, the operation groove 3 is located between two adjacent through-length reinforcements 2-1 at the corresponding position, and the longitudinal reinforcements avoid the region of the concrete body 1 where the operation groove 3 is located. The design optimizes the steel reinforcement frame 2 according to the structure of the operation groove 3 in the above design, and the through-length reinforcements 2-1 and the longitudinal reinforcements 2-2 avoid the operation groove 3. Thus, the strength of the concrete structure around the operation groove 3 can be optimized, and the integrity of the operation groove 3 structure is ensured.

[0033] In the technical scheme provided by the embodiment, the two ends of the longitudinal rib 2-2 are hook-shaped, and the longitudinal rib 2-2 is connected with the through-length rib 2-1 through the hook-shaped end structure, and the longitudinal rib 2-2 and each through-length rib 2-1 connected therewith are connected and fixed through the binding rope structure. The design optimizes the longitudinal rib 2-2 and the through-length rib 2-1 on the basis of the above-mentioned steel reinforcement frame 2 structure, and sets a hook-shaped structure at the two ends of the longitudinal rib 2-2, hooks the through-length rib 2-1 through the structure, and cooperates with the iron wire and other binding structures to be bound and fixed.

[0034] In the technical scheme provided by the embodiment, the steel reinforcement frame 2 includes the spiral spring-shaped stirrup 2-3 at the two ends thereof, the spiral spring-shaped stirrup 2-3 is wrapped outside the through hole 4, and the spiral spring-shaped stirrup 2-3 is connected and fixed with the through-length rib 2-1 at the corresponding position. The design further optimizes the through hole 4 in the concrete body 1, the concrete around the through hole 4 is a stress concentration area, and the spiral spring-shaped stirrup 2-3 arranged outside the area can play a good restraining effect on the concrete in the surrounding area, and can effectively improve the bearing capacity of the connecting joint.

[0035] In the technical scheme provided by the embodiment, the steel reinforcement frame 2 further includes the three-folded inclined strut rib 2-3 connected at the two ends thereof, the three-folded inclined strut rib 2-3 includes a horizontal rib part and inclined rib parts integrally connected at the two ends of the horizontal rib part, the horizontal rib part is fixedly attached to the through-length rib 2-1 at the end of the steel reinforcement frame 2, and the end of the inclined rib part is fixed to the other through-length rib on the opposite side of the through-length rib 2-1, for strengthening the two ends of the steel reinforcement frame 2. The design is the same as the above-mentioned spiral spring-shaped stirrup 2-3, and the three-folded inclined strut rib 2-3 structure is arranged in the stress concentration key area of the connecting joint device, which can effectively avoid the inclined cracks of the connecting surface at the two ends of the joint device under the action of load.

[0036] In the technical scheme provided by the embodiment, the cross section of the operation sink 3 is trapezoidal, the position where the through hole 4 communicates with the operation sink 3 is located on the inner surface of the sink in the longer bottom side of the trapezoid, the inner surface of the sink is a semi-circular surface, and the through hole 4 is an arc hole for installing an arc-shaped screw rod. The design provides an optimized operation sink 3 design, which adopts an arc hole to adapt to an arc-shaped screw rod. This screw rod distribution design is better adapted to the stress mode of the cable trench connected at the two ends, and a smaller through hole 4 can be used for installation, which causes less damage to the structural integrity of the connecting joint device. A corresponding operation sink 3 with a trapezoidal cross section is adopted, and the size of the longitudinal section of the trapezoidal operation sink 3 decreases along the direction from the lower bottom to the upper bottom of the cross section, and the longitudinal section shape is a semi-circular surface, one side of which is a continuous arc curve. The opening of the through hole 4 on the inner surface of the operation sink 3 is located on the side with the largest longitudinal section area. Such an operation sink 3 structure minimizes the damage to the integrity of the concrete body 1 on the premise of ensuring the basic function of installing a screw rod.

[0037] In the technical scheme provided by the embodiment, the operation groove 3 is in the shape of a cuboid, and the through hole 4 is a straight hole for mounting a linear screw rod. This design provides another preferred design of the through hole 4 and the operation groove 3. The straight hole design is matched with the cuboid-shaped operation groove 3, the connection operation of the screw rod is more convenient, the overall shape requirement is relatively low, the accuracy requirement of the mold is lower, and the connection node cost is lower than the above-mentioned arc hole design.

[0038] In the technical scheme provided by the embodiment, the concrete body 1 is a hybrid fiber concrete body. This design provides a preferred concrete material selection design, adopts hybrid fiber concrete, and further improves the toughness of the concrete body 1 itself, wherein the hybrid fiber preferably adopts the design of coating the grid fiber 6 around the frame.

[0039] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present disclosure.

Claims

1. A ductile fabricated concrete trench dry joint node device, characterized by, The utility model provides a reinforced concrete pipe groove connecting piece, which comprises a pre-embedded steel frame (2) and a concrete body (1) wrapped outside the steel frame (2), the steel frame (2) is in the shape of a cuboid cage, the two ends of the outer contour of the concrete body (1) are in the shape of a cuboid, the two ends of the concrete body (1) are provided with through holes (4) for mounting connecting screws (5) for butt joint with to-be-connected concrete pipe groove parts, the through holes (4) are located in the concrete body (1) region inside the steel frame (2), the concrete body (1) is provided with inwardly recessed operation grooves (3) at positions close to the two ends of the side surface, the operation grooves (3) are communicated with the end portions of the through holes (4), and the connecting screws (5) passing through the through holes (4) are fastened or loosened through the operation grooves (3).

2. The dry joint node device for the ductile fabricated concrete trench according to claim 1, characterized in that, The steel frame (2) comprises through-length bars (2-1) uniformly arranged at intervals and preset distances, the through-length bars are connected with each other through a plurality of longitudinal bars (2-2), and the longitudinal bars (2-2) are connected and fixed with four top corners of the through-length bars (2-1) and a frame.

3. The dry joint node device for the ductile fabricated concrete trench according to claim 2, characterized in that, The operation grooves (3) are located between two adjacent through-length bars (2-1) at corresponding positions, and the longitudinal bars avoid the concrete body (1) region where the operation grooves (3) are located.

4. The dry connection joint device of the toughened fabricated concrete trench according to claim 2, characterized in that, The two ends of the longitudinal bars (2-2) are in the shape of hooks, the longitudinal bars (2-2) are connected with the through-length bars (2-1) through the hook-shaped end head structures, and the longitudinal bars (2-2) and the through-length bars (2-1) connected therewith are connected and fixed through a binding rope structure.

5. The dry connection joint device of the toughened fabricated concrete trench according to claim 2, characterized in that, The steel frame (2) comprises spiral spring-shaped stirrups (2-3) located at the two ends thereof, the spiral spring-shaped stirrups (2-3) surround the through holes (4) outside, and the spiral spring-shaped stirrups (2-3) are connected and fixed with the through-length bars (2-1) at corresponding positions.

6. The dry connection joint device of the toughened fabricated concrete trench according to claim 2, characterized in that, The steel frame (2) further comprises three-folded inclined bracing bars (2-4) connected at the two ends thereof, the three-folded inclined bracing bars (2-4) comprise a horizontal bar portion and inclined bar portions integrally connected at the two ends of the horizontal bar portion, the horizontal bar portion is fixedly attached to the through-length bars (2-1) at the end heads of the steel frame (2), and the end heads of the inclined bar portions are fixed to another through-length bar (2-1) on the opposite side of the through-length bar (2-1) for reinforcing the two ends of the steel frame (2).

7. The dry joint node device for the ductile fabricated concrete trench according to any one of claims 1 to 6, characterized in that, The operation grooves (3) are in the shape of a trapezoid, the position, where the through holes (4) are communicated with the operation grooves (3), is located in the groove inner face where the longer bottom edge of the trapezoid is located, the groove inner face is in the shape of a semicircle, and the through holes (4) are arc holes for mounting arc-shaped screws.

8. The dry joint node device for the ductile fabricated concrete trench according to any one of claims 1-6, characterized in that, The operation grooves (3) are in the shape of a cuboid, and the through holes (4) are straight holes for mounting straight-line screws.

9. The dry connection joint node device of the toughened fabricated concrete trench according to claim 1, characterized in that, The concrete body (1) is a hybrid fiber concrete body (1).

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