Dowel bar device for cement concrete panel

Abstract

The utility model discloses a dowel bar device for a cement concrete panel, belongs to the field of roads, and solves the problems that slab staggering, cracking, cracking, void and slab breaking are easy to generate at the junction of a longitudinal joint and an expansion joint of the cement concrete panel. The device comprises two U-shaped dowel bars and a sleeve, an internal thread is arranged at one end of the sleeve, a first side bar and a second side bar are arranged on the two sides of each U-shaped dowel bar respectively, an external thread is arranged at the end of each first side bar, and the two U-shaped dowel bars are connected through the sleeve to form a rectangular structure. The first side rod of one U-shaped dowel bar and the second side rod of the other U-shaped dowel bar are connected to the same sleeve, the first side rod is connected with the sleeve through threads, and the second side rod is connected with the sleeve in an inserted mode. The four panel corners at the longitudinal joints and the expansion joints can be connected to form a closed loop, the functions of the longitudinal joints and the expansion joints in the prior art are considered, the integrity of the cement pavement structure is enhanced, and the effects of preventing slab staggering, cracking, cracking, disengaging and slab breaking are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the field of roads, and in particular relates to a cement concrete panel force transmission rod device. Background Art

[0002] In recent years, with the vigorous development of my country's infrastructure, the development and application of various infrastructure technologies have steadily moved forward. Cement concrete pavement is a type of roadway that can be traced back to the 19th century. Advantages of cement concrete pavement: ① High strength, concrete pavement has high compressive strength and high flexural tensile strength and wear resistance; ② Good stability, the water stability and thermal stability of concrete pavement are good, and there is no "aging" phenomenon of asphalt pavement; ③ Good durability, the strength and stability of concrete pavement are good, and it is durable; ④ Low maintenance cost and high economic benefit; ⑤ It is conducive to night driving, the concrete pavement has bright color and good visibility, and the construction that is conducive to night driving has been greatly improved. Based on its many advantages, cement concrete pavement can continue to this day. Today, many material engineers and civil engineers, combined with the current development situation, promote the use of ecological, environmentally friendly and renewable directions. For example: continuously reinforced concrete pavement, steel fiber concrete pavement, high-performance concrete pavement, composite pavement, etc.

[0003] Diseases of cement concrete pavement often occur. In addition to the main reasons such as the material itself, joint treatment, maintenance and construction, there are also the influence of climate and large vehicles. At present, longitudinal joints and expansion joints are set in the slab of cement concrete pavement to ensure the continuity of load stress transfer and prevent cracks caused by shrinkage and temperature changes. However, in the existing dowel rod construction method, dowel rods are set at the longitudinal joints and expansion joints respectively. The integrity of the dowel rod at the intersection of the longitudinal joints and expansion joints is not strong, which is prone to misalignment, cracks, cracks, gaps, and broken boards. Utility Model Content

[0004] The utility model aims to provide a cement concrete panel force transmission rod device to solve the problem that misalignment, cracks, fissures, voids and broken panels are easily generated at the intersection of the longitudinal joint and the expansion joint of the cement concrete panel.

[0005] The technical solution of the utility model is: a cement concrete panel force transmission rod device, including two U-shaped force transmission rods and a sleeve, one end of the sleeve is provided with an internal thread, the two sides of the U-shaped force transmission rod are respectively a first side rod and a second side rod, the end of the first side rod is provided with an external thread, the two U-shaped force transmission rods are connected by the sleeve to form a rectangular structure, the first side rod of one U-shaped force transmission rod and the second side rod of the other U-shaped force transmission rod are connected to the same sleeve, the first side rod and the sleeve are connected by threads, and the second side rod and the sleeve are plugged in.

[0006] As a further improvement of the utility model, gauze is filled between the first side rod and the second side rod in each threaded sleeve.

[0007] As a further improvement of the present invention, the first side rod and the second side rod have different lengths.

[0008] The beneficial effects of the utility model are as follows: the utility model designs a rectangular force transmission rod device, which can connect the four panel corners at the longitudinal joint and the expansion joint to form a closed loop. The combined force transmission rod device can not only play a role in the continuity of the longitudinal stress transmission under the vehicle load, but also slow down the cracking of the cement panel caused by shrinkage or temperature shrinkage in the transverse direction, which can reduce the resonance response of the vehicle and offset part of the tensile stress. It not only takes into account the role of the previous longitudinal joint and expansion joint, but also strengthens the integrity of the cement pavement structure, and significantly improves the effect of preventing misalignment, cracks, cracking, voiding, and broken panels, thereby extending the life of the cement concrete pavement. The force transmission rod device is formed by connecting two U-shaped force transmission rods, and one end is plug-connected, using a non-rigid connection method, which can play a buffering role; the connection is filled with gauze to enhance the buffering effect; by designing the first side rod and the second side rod of different lengths, the buffer positions on both sides are staggered, and the design is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 It is a structural schematic diagram of the U-shaped force transmission rod 5 in the utility model;

[0011] Figure 3 It is a side view of the utility model;

[0012] Figure 4 It is a usage state diagram of the utility model.

[0013] In the figure: 1-internal thread; 2-gauze; 3-sleeve; 4-external thread; 5-U-shaped force transmission rod; 51-first side rod; 52-second side rod; 53-middle rod. DETAILED DESCRIPTION

[0014] The utility model is described in detail below in conjunction with the accompanying drawings.

[0015] Embodiment 1,

[0016] like Figure 1 , Figure 2As shown, a cement concrete panel force transmission rod device includes two U-shaped force transmission rods 5 and a sleeve 3. One end of the sleeve 3 is provided with an internal thread 1. The two sides of the U-shaped force transmission rod 5 are respectively a first side rod 51 and a second side rod 52. The end of the first side rod 51 is provided with an external thread 4. The two U-shaped force transmission rods 5 are connected by the sleeve 3 to form a rectangular structure. The first side rod 51 of one U-shaped force transmission rod 5 and the second side rod 52 of the other U-shaped force transmission rod 5 are connected to the same sleeve 3. The first side rod 51 is connected to the sleeve 3 by threads, and the second side rod 52 is plugged into the sleeve 3.

[0017] Gauze 2 is filled between the first side rod 51 and the second side rod 52 in each threaded sleeve 3 .

[0018] The first side bar 51 and the second side bar 52 have different lengths.

[0019] The U-shaped force transmission rod 5 and the sleeve 3 are both made of stainless steel.

[0020] When using, Figure 3 As shown, the utility model is constructed at the intersection of the longitudinal joint and the expansion joint of the cement concrete panel, the middle rod 53 of the U-shaped force transmission rod spans the longitudinal joint, the second side rod 52 spans the expansion joint, and the two sleeves 3 are respectively located on both sides of the expansion joint.

[0021] The construction method is as follows:

[0022] Step 1: Connect two U-shaped force transmission rods 5 through the sleeve 3, the length of the threaded connection section between the first side rod 51 and the sleeve 3 is 20 mm, the length of the plug-in section between the second side rod 52 and the sleeve 3 is not less than 70 mm, and a 30 mm spacing is left between the first side rod 51 and the second side rod 52 and filled with gauze 2, forming the force transmission rod device of the utility model;

[0023] Step 2: Fix the dowel rod bracket, place the dowel rod device, and set the end wooden mold;

[0024] Step 3: Spread the lower layer of concrete of the dowel rod device, and compact it with an inserted vibrator, correct the position of the dowel rod device, and then pour the upper layer of concrete to complete the pouring of a cement concrete panel;

[0025] Step 4: Remove the end wooden formwork, set up the caulking board, and press the wooden strips on the caulking board;

[0026] Step 5: pour another cement concrete panel of the same section, and then pour another two cement concrete panels in succession;

[0027] Step 6: Remove the wooden strips and insert the expansion joint filler.

[0028] The utility model is suitable for two-way carriageways and is arranged at the intersection of expansion joints and longitudinal joints. It can not only play a role in longitudinal force transmission and transverse tensile resistance, but also effectively prevent the concrete panel from arching, misalignment and warping, thus solving the problem of damage caused by uneven stress of cement concrete panels.

[0029] The first side rod 51 is connected to the sleeve 3 by a threaded connection, and the second side rod 52 is plugged into the sleeve 3, which is convenient for transferring the driving load between the two road panels and preventing misalignment, increasing the stress transfer between adjacent cement concrete panels to prevent uneven settlement of the concrete road surface caused by large local stress on the concrete road surface, and transferring stress to make adjacent cement concrete panels bear stress together.

Claims

1. A cement concrete panel dowel rod device, characterized in that: The invention comprises two U-shaped force transmission rods (5) and a sleeve (3), wherein one end of the sleeve (3) is provided with an internal thread (1), the two sides of the U-shaped force transmission rod (5) are respectively provided with a first side rod (51) and a second side rod (52), the end of the first side rod (51) is provided with an external thread (4), the two U-shaped force transmission rods (5) are connected via the sleeve (3) to form a rectangular structure, the first side rod (51) of one U-shaped force transmission rod (5) and the second side rod (52) of the other U-shaped force transmission rod (5) are connected to the same sleeve (3), the first side rod (51) and the sleeve (3) are connected via threads, and the second side rod (52) and the sleeve (3) are plugged into each other.

2. A cement concrete panel dowel rod device according to claim 1, characterized in that: Gauze (2) is filled between the first side rod (51) and the second side rod (52) in each threaded sleeve (3).

3. A cement concrete panel dowel rod device according to claim 1 or 2, characterized in that: The first side rod (51) and the second side rod (52) have different lengths.

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