Expansion joint structure of concrete floor

Abstract

The present application relates to the field of pavement engineering, and in particular to an expansion joint structure of a large-area concrete floor. The expansion joint structure of a large-area concrete floor comprises an expansion joint formed in a floor body. Angular steel bars are each provided at the tops of two vertical sides of the expansion joint; and the tops of the angular steel bars are flush with the top of the floor body. A reinforcing bar is pre-embedded in the floor body. A plurality of anchor bolts are provided on each of the two angular steel bars. A separation plate for implementing concrete separation is provided below one of the angular steel bars. A foam sheet is sandwiched between the two angular steel bars, and the foam sheet extends downwards to be close to the bottom of the expansion joint and is tightly attached to the separation plate. A pressure relief anchor piece is horizontally and fixedly arranged on the separation plate in a penetrating manner. One side of the pressure relief anchor piece inclines downwards in a direction away from the expansion joint, and the other side of the pressure relief anchor piece passes through the expansion joint and is sleeved with an anchor piece sleeve formed in the floor body. The anchor piece sleeve is in clearance fit with the pressure relief anchor piece inside the anchor piece sleeve. The present application has the advantage of reducing the possibility of damage to concrete edges at the tops of side walls of expansion joints.

Description

Concrete floor expansion joint structure Technical Field

[0001] The present application relates to the field of pavement engineering, and in particular to a large-area concrete floor expansion joint structure. Background Art

[0002] Expansion joints refer to structural joints opened at appropriate locations along the construction joint direction of a structure to prevent building components from cracking or being damaged due to changes in climate temperature.

[0003] There are two main ways to form expansion joints in the existing technology. The first is to use a cutting machine to directly cut and open the concrete after solidification and hardening. The second is to pre-embed a forming structure on the roadbed. During the process of concrete solidification and hardening, the forming structure is naturally subjected to force to form expansion joints.

[0004] Due to the existence of the expansion joint, when a vehicle passes over the expansion joint, the concrete edge at the top of the expansion joint will be subjected to greater pressure, so it may be broken, which is an obvious disadvantage.

[0005] Summary of the Invention

[0006] In order to improve the damage condition of the edge of the top of the expansion joint side wall, the present application provides a large-area concrete floor expansion joint structure.

[0007] The large-area concrete floor expansion joint structure provided in this application adopts the following technical solutions:

[0008] A large-area concrete floor expansion joint structure includes an expansion joint formed on the floor body. The tops of the two vertical sides of the expansion joint are provided with angular steel bars, and the tops of the angular steel bars are flush with the top of the floor body.

[0009] In the above technical solution, since the corner steel bars are made of steel, they have greater strength and hardness, which can protect the corners at the top of the expansion joint, reducing the possibility of damage due to the force brought by the vehicle during driving, thereby increasing the service life of large-area floors.

[0010] Optionally, steel bars are pre-embedded in the floor body, and a plurality of anchor bolts are provided on the two angled steel bars. The anchor bolts are connected to the steel bars, and the anchor bolts are cast and formed in the floor body.

[0011] By adopting the above technical solution, workers welded the anchor bolts to the pre-tied steel bars, thereby achieving the positioning of the expansion joint structure during the concrete pouring process.

[0012] Optionally, a partition for separating concrete is provided below one of the angled steel bars.

[0013] Before pouring concrete, the two angled steel bars are in close contact with each other. After the concrete is poured, the concrete hardens and generates shrinkage force, thereby naturally forming an expansion joint at the partition according to the above technical solution, and the two angled steel bars also separate from each other due to the shrinkage of the concrete.

[0014] Optionally, the two angled steel bars are bolted together by a plurality of plastic bolts.

[0015] By adopting this technical solution, when the expansion joint structure is pre-arranged, the plastic bolts hold the two angled steel bars in close contact, thus reducing the possibility of concrete entering between the two angled steel bars during pouring. Because the plastic bolts are made of plastic, the force exerted by the concrete on the two angled steel bars during the subsequent hardening and contraction of the concrete can directly tear the plastic bolts apart.

[0016] Optionally, a foam board is sandwiched between the two angled steel bars, and the foam board extends downward to near the bottom of the expansion joint and is in close contact with the partition.

[0017] By adopting the above technical solution, the foam board is easily broken under the shrinkage of the concrete, which reduces the possibility that the concrete and the partition are difficult to separate, resulting in the inability to naturally form an expansion joint.

[0018] Optionally, a pressure relief anchor is fixed horizontally on the partition, one side of the pressure relief anchor is inclined downward in the direction away from the expansion joint, and the other side passes through the expansion joint and is sleeved with an anchor sleeve formed in the floor body, and the anchor sleeve is clearance-fitted with the pressure relief anchor inside it.

[0019] By adopting the above technical solution, since the pressure relief anchors on both sides of the expansion joint are an integral whole, when one side is subjected to force, the other side will be relatively offset. Therefore, the pressure relief anchor can release the load it receives within the anchor sleeve, thereby eliminating the vertical displacement of the concrete on both sides of the expansion joint.

[0020] Optionally, an adjustment groove is vertically opened on each of the two angled steel bars, a threaded knob is threadedly connected to the inner surface of the adjustment groove, a reinforcing wire is provided at the bottom of the threaded knob, and bellows are connected to the positions of the adjustment grooves at the bottom of the two angled steel bars, one bellows is connected to the pressure relief anchor plate, and the other bellows is connected to the anchor plate sleeve, and both reinforcing wires pass through the corresponding bellows and are connected to the pressure relief anchor plate.

[0021] When vehicles frequently travel on the floor, the pressure relief anchors may experience frequent deformation, leading to a decrease in their deformation performance. Using the aforementioned technical solution, workers twist the threaded knob, causing the reinforcing wire to apply appropriate prestress to the pressure relief anchors at the corresponding expansion joints, thereby improving the pressure relief anchors' effectiveness in reducing floor loads.

[0022] Optionally, the tops of the two angular steel bars are provided with mutually connected detection rotating grooves with flush bottom walls, and a detection paddle is rotatably provided in each detection rotating groove for rotating into the other detection rotating groove, and the detection paddle is in close contact with the lower surface of the detection rotating groove.

[0023] Using this technical solution, workers manually rotate the inspection paddles. If both inspection paddles can be rotated into the other inspection groove, it means that the two angled steel bars are flush. Conversely, if only one inspection paddle can be rotated into the other inspection groove, it means that there is a height difference between the two angled steel bars, and the worker needs to adjust the prestressing force at the corresponding position of the pressure relief anchor.

[0024] In summary, this application achieves at least one of the following beneficial technical effects:

[0025] 1. Since the corner steel bars are made of steel, they are strong and hard, which can protect the corners at the top of the expansion joint, reducing the possibility of damage due to the force caused by the vehicle during driving, thereby increasing the service life of large-area floors and reducing the cost of subsequent maintenance and rework;

[0026] 2. Before pouring concrete, the two angled steel bars are close to each other. After the concrete pouring is completed, the concrete hardens and generates shrinkage force, which naturally forms an expansion joint at the partition. The two angled steel bars also separate from each other under the action of concrete shrinkage;

[0027] 3. When pre-arranging the expansion joint structure, plastic bolts are used to keep the two angled steel bars close together, thereby reducing the possibility of concrete entering between the two angled steel bars during the concrete pouring process. Since the plastic bolts are made of plastic, the force exerted by the concrete on the two angled steel bars during the subsequent hardening and shrinkage of the concrete can directly tear the plastic bolts apart;

[0028] 4. Since the pressure relief anchors on both sides of the expansion joint are an integral unit, when one side is stressed, the other side will shift relative to it. Therefore, the pressure relief anchor can release the load within the anchor sleeve, thereby eliminating the vertical displacement of the concrete on both sides of the expansion joint.

[0029] 5. When vehicles travel frequently on the floor, the pressure relief anchor may experience a decrease in its deformation performance due to frequent deformation. Therefore, workers turn the threaded knob to allow the reinforcing wire to apply appropriate prestress to the area of ​​the pressure relief anchor corresponding to the expansion joint, thereby improving the pressure relief anchor's ability to eliminate the load on the floor.

[0030] 6. The worker manually rotates the detection paddles. If both detection paddles can be rotated into the other detection rotation groove, it means that the two angled steel bars are flush. Conversely, if only one detection paddle can be rotated into the other detection rotation groove, it means that there is a height difference between the two angled steel bars, and the worker needs to adjust the prestressing force at the corresponding position of the pressure relief anchor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a cross-sectional view showing the positional relationship among the partition, the angular steel bar and the pressure relief anchor sheet in Example 1 of the present application.

[0032] FIG2 is a cross-sectional view showing the positional relationship among the bellows, the reinforcing wire, and the pressure relief anchor sheet in Example 2 of the present application.

[0033] FIG3 is a structural diagram of the positional relationship between the detection rotating groove and the detection paddle on the angular steel bar in Example 2 of the present application.

[0034] Explanation of the accompanying symbols: 1. Expansion joint; 2. Floor body; 3. Angular steel bar; 301. Adjustment groove; 302. Detection rotation groove; 4. Steel bar; 5. Anchor bolt; 6. Partition; 8. Foam board; 9. Pressure relief anchor plate; 10. Anchor plate sleeve; 11. Threaded knob; 12. Reinforcement wire; 13. Bellows; 14. Detection pick. DETAILED DESCRIPTION

[0035] The present application is further described in detail below with reference to Figures 1-3.

[0036] The embodiments of the present application disclose a large-area concrete floor expansion joint structure.

[0037] Example 1

[0038] Referring to Figure 1, the expansion joint structure of a large-area concrete floor includes two parallel angular steel bars 3. The floor body 2 is cast by concrete, and an expansion joint 1 is formed on the floor body 2. The two angular steel bars 3 are respectively located at the top of both sides of the expansion joint 1, and the top of the angular steel bars 3 is flush with the top of the floor body 2.

[0039] Referring to Figure 1 , because the angled steel bars 3 are made of steel, they possess greater strength and hardness. Using these angled steel bars 3 to replace the concrete edges at the top of the sidewalls of the expansion joint 1 reduces the likelihood of damage to the top edges of the expansion joint 1, thereby reducing subsequent repair and rework costs.

[0040] 1 , steel bars 4 are embedded in the floor body 2 , and two angled steel bars 3 are welded with anchor bolts 5 along their lengths. The anchor bolts 5 are welded to the steel bars 4 and are cast in the floor body 2 .

[0041] The connection between the angled steel bar 3 and the steel bar 4 is achieved through the anchor bolt 5, which plays a role in positioning the position of the expansion joint 1 structure in the concrete. The welded connection is firm and there is no need to worry about it moving in the concrete.

[0042] 1 , a partition 6 for separating concrete is welded under one of the angled steel bars 3. As the concrete hardens and shrinks, the deformation force forces the concrete to separate from one side of the steel plate, which helps the expansion joint 1 to form naturally between the two angled steel bars 3.

[0043] 1, two angled steel bars 3 are bolted together along their lengths by multiple plastic bolts (not shown). When the expansion joint 1 structure is pre-arranged before pouring concrete, workers bolt the two angled steel bars 3, which are accurately positioned, together by the plastic bolts.

[0044] After the concrete is poured, the hardened concrete generates shrinkage forces, which act on the two angled steel bars 3, causing them to separate. Because the plastic bolts are made of plastic and have relatively low strength and hardness, the two angled steel bars 3 can work together to tear the plastic bolts apart. This reduces the possibility of the shrinkage forces generated during the hardening concrete causing the expansion joint 1 to shift.

[0045] 1 , a foam board 8 is sandwiched between the two angled steel bars 3. The foam board 8 extends downward to the bottom of the expansion joint 1 and is in close contact with the partition 6. Before concrete pouring, the foam board 8 is in close contact with the two angled steel bars 3 and the partition 6.

[0046] During the process of concrete hardening and shrinkage, the two angled steel bars 3 are pulled apart from the foam board 8, and at the same time, the foam board 8 is pulled apart from the partition 6 by the concrete, thereby reducing the possibility of the concrete being directly cast with the partition 6, which makes it difficult to separate and form the expansion joint 1 later.

[0047] Referring to Figure 1, a pressure relief anchor plate 9 is fixed horizontally on the partition 6. One side of the pressure relief anchor plate 9 is inclined downward in the direction away from the expansion joint 1, and the other side passes through the expansion joint 1 and is sleeved with an anchor plate sleeve 10 cast in the floor body 2. The anchor plate sleeve 10 is clearance-fitted with the pressure relief anchor plate 9 inside it.

[0048] The pressure relief anchor plate 9 in the present application is a whole, and when one side is subjected to force, the other side will deviate accordingly. Therefore, during use, when the inclined side of the pressure relief anchor plate 9 is subjected to a vertical load, the reaction force of the pressure relief anchor plate 9 will transfer the load to the part of the anchor plate sleeve 10. Since there is a gap in the anchor plate sleeve 10 for the pressure relief anchor plate 9 to move freely, the pressure relief load can release the load in the anchor plate sleeve 10, thereby eliminating the vertical displacement between the concrete on both sides of the expansion joint 1.

[0049] The expansion joint 1 structure in this application does not require secondary processing after the later construction is completed, and the construction process is simpler than that of ordinary expansion joints 1, which can greatly reduce the required construction equipment and personnel, and is therefore more economical.

[0050] The implementation principle of Example 1 is as follows: workers first tie the steel bars 4, then arrange the welded anchor bolts 5, angled steel beams, and partitions 6 at the planned location. After determining the elevation of the top of the angled steel beams, they weld the anchor bolts 5 to the steel bars 4, then bolt the two angled steel beams together with plastic bolts, and finally pour concrete. When the concrete hardens and shrinks, the tensile force exerted by the concrete on the two angled steel bars 3 separates them, allowing the two angled steel bars 3 to cooperate in breaking the plastic bolts, and naturally forming an expansion joint 1 between the two angled steel bars 3. When the inclined side of the pressure relief anchor plate 9 is subjected to a vertical load, the reaction force of the pressure relief anchor plate 9 will transfer the load to the part of the anchor plate sleeve 10. Since there is a gap in the anchor plate sleeve 10 for the pressure relief anchor plate 9 to move freely, the pressure relief load can release the load within the anchor plate sleeve 10, thereby eliminating the vertical displacement between the concrete on both sides of the expansion joint 1.

[0051] Example 2

[0052] 2 , the difference between this embodiment and embodiment 1 is that an adjustment groove 301 is vertically opened between the upper and lower surfaces of the two angled steel bars 3 , a threaded knob 11 is connected to the inner thread of the adjustment groove 301 , and a reinforcing wire 12 is attached to the bottom of the threaded knob 11 .

[0053] The positions at the bottom of the two angled steel bars 3 corresponding to the adjustment grooves 301 are both connected to bellows 13. One bellows 13 is directly connected to the inclined side of the pressure relief anchor plate 9, and the other bellows 13 is connected to the anchor plate sleeve 10. The two reinforcing wires 12 pass through the corresponding bellows 13 and are tied to the pressure relief anchor plate 9.

[0054] 2 , when vehicles travel frequently on the floor, the pressure relief anchor plate 9 may experience a decrease in its deformation performance due to frequent deformation. Therefore, the worker turns the threaded knob 11 to allow the reinforcing wire 12 to apply appropriate prestress to the portion of the pressure relief anchor plate 9 corresponding to the expansion joint 1, thereby improving the effect of the pressure relief anchor plate 9 in eliminating the load on the floor.

[0055] 3 , the tops of the two angular steel bars 3 are provided with mutually connected detection rotating grooves 302 with flush bottom walls. A detection paddle 14 is rotatably provided in each detection rotating groove 302 for rotating into another detection rotating groove 302 , and the detection paddle 14 is in close contact with the lower surface of the detection rotating groove 302 .

[0056] 2 and 3 , a worker manually rotates the two detection paddles 14 . If both detection paddles 14 can be rotated into the corresponding other detection rotation groove 302 , it indicates that the two angular steel bars 3 are flush, the pressure relief anchor 9 is in good condition, and no adjustment is required.

[0057] If only one detection paddle 14 can be rotated into the corresponding detection rotation groove 302 , it indicates that there is a height difference between the two angular steel bars 3 , and the prestress of the pressure relief anchor 9 needs to be adjusted.

[0058] 3 , the worker can determine the adjustment position for adjusting the prestress of the pressure relief anchor 9 by determining which of the two detection paddles 14 cannot be rotated into the other detection rotation slot 302 .

[0059] The working principle of Example 2 is as follows: A worker manually rotates two detection paddles 14 and determines whether the two angled steel bars 3 are aligned at the same height by observing whether the detection paddles 14 can be rotated into the other detection slot. If there is a height difference, the worker turns the threaded knob 11, causing the reinforcing wire 12 to apply appropriate prestress to the portion of the pressure relief anchor 9 corresponding to the expansion joint 1, thereby improving the pressure relief anchor 9's ability to reduce the load on the floor.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A concrete floor expansion joint structure, comprising an expansion joint (1) formed on a floor body (2), characterized in that: Angular steel bars (3) are provided at the tops of both vertical sides of the expansion joint (1), and the tops of the angular steel bars (3) are flush with the tops of the floor body (2).

2. The concrete floor expansion joint structure according to claim 1 is characterized in that: Steel bars (4) are pre-buried in the floor body (2), and a plurality of anchor bolts (5) are arranged on the two angled steel bars (3). The anchor bolts (5) are connected to the steel bars (4), and the anchor bolts (5) are cast and formed in the floor body (2).

3. The concrete floor expansion joint structure according to claim 1 is characterized in that: A partition plate (6) for separating concrete is arranged below one of the angled steel bars (3).

4. The large-area concrete floor expansion joint structure according to claim 1 is characterized by: The two angle steel bars (3) are bolted together by a plurality of plastic bolts.

5. The concrete floor expansion joint structure according to claim 3 is characterized in that: A foam plate (8) is sandwiched between the two angled steel bars (3), and the foam plate (8) extends downward to near the bottom of the expansion joint (1) and is closely attached to the partition plate (6).

6. The concrete floor expansion joint structure according to claim 3 is characterized by: A pressure relief anchor plate (9) is fixedly provided horizontally on the partition plate (6), one side of the pressure relief anchor plate (9) is inclined downward in a direction away from the expansion joint (1), and the other side passes through the expansion joint (1) and is sleeved with an anchor plate sleeve (10) formed in the floor body (2), and the anchor plate sleeve (10) and the pressure relief anchor plate (9) therein are in clearance fit.

7. The large-area concrete floor expansion joint structure according to claim 6 is characterized by: Both of the two angled steel bars (3) are vertically provided with adjustment grooves (301), the adjustment grooves (301) are internally threadedly connected with a threaded knob (11), a reinforcing wire (12) is arranged at the bottom of the threaded knob (11), and the bottoms of the two angled steel bars (3) corresponding to the adjustment grooves (301) are both connected with bellows (13), one of the bellows (13) is connected to the pressure relief anchor plate (9), and the other of the bellows (13) is connected to the anchor plate sleeve (10), and both of the two reinforcing wires (12) pass through the corresponding bellows (13) and are connected to the pressure relief anchor plate (9).

8. The concrete floor expansion joint structure according to claim 7 is characterized in that: The tops of the two angled steel bars (3) are provided with mutually connected detection rotating grooves (302) with flush bottom walls, and each detection rotating groove (302) is provided with a detection paddle (14) rotatably arranged therein for rotating into another detection rotating groove (302), and the detection paddle (14) is in close contact with the lower surface of the detection rotating groove (302).

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