Expansion joints and their construction methods

Abstract

The present application provides an expansion joint and a construction method thereof, wherein the expansion joint construction method comprises: forming a first concrete block on one side of the expansion joint; placing an extruded board on the side of the first concrete block facing the expansion joint, with the end of the extruded board maintaining a predetermined distance from the facade of the building; placing an L-shaped positioning structure and a plastic strip in sequence at one end of the extruded board facing the facade, with the vertical part of the L-shaped positioning structure abutting against the end of the extruded board, the horizontal part of the L-shaped positioning structure abutting against the end of the plastic strip, and the other end of the plastic strip extending to the facade; forming a second concrete block on the other side of the expansion joint. In the expansion joint and the construction method thereof provided by the present application, an extruded board is used as a template for the expansion joint, and an L-shaped positioning structure and a plastic strip are sequentially arranged between the end of the extruded board and the facade of the building, so that the width of the expansion joint on the facade is reduced and can be hidden using decorative strips, thereby making the facade of the building smoother and more beautiful.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an expansion joint and a construction method thereof. Background Art

[0002] With the continuous development and innovation of fair-faced concrete technology, fair-faced concrete buildings have been widely promoted. In recent years, some high-end construction projects such as Hainan Sanya Airport, Capital Airport, Shanghai Pudong International Airport Terminal, and the large inclined cylinder of the Oriental Pearl Tower have all adopted fair-faced concrete. Fair-faced concrete not only gives people a smooth, neat, and angular aesthetic feeling on the structural surface, but also brings certain comprehensive benefits to construction companies in terms of the number of times the template is used.

[0003] However, bare concrete buildings have high requirements for the construction effect of the facade. However, according to the specification requirements, buildings over a certain length must be equipped with expansion joints, which disconnect the building components above the foundation to prevent the building from cracking or being damaged due to climate temperature changes (thermal expansion and contraction). According to construction practices, the expansion joint is generally 10cm wide. The existence of expansion joints greatly affects the decoration effect of the facade of bare concrete buildings. Summary of the invention

[0004] The object of the present invention is to provide an expansion joint and a construction method thereof, so as to solve the problem that the construction effect is affected by the expansion joint on the facade of the existing plain concrete building.

[0005] In order to solve the above technical problems, the present invention provides an expansion joint construction method, the expansion joint construction method comprising:

[0006] Step 1: Determine the location and dimensions of the expansion joint;

[0007] Step 2: pouring concrete for the first time on one side of the expansion joint to form a first concrete block;

[0008] Step 3: placing an extruded board on the side of the first concrete block facing the expansion joint, with the end of the extruded board maintaining a predetermined distance from the facade of the building;

[0009] Step 4: placing an L-shaped positioning structure and a plastic strip in sequence at one end of the extruded board facing the exterior facade, wherein the L-shaped positioning structure includes a vertical portion and a horizontal portion, wherein the vertical portion of the L-shaped positioning structure abuts against the end of the extruded board, and the horizontal portion of the L-shaped positioning structure abuts against the end of the plastic strip, and the other end of the plastic strip extends to the exterior facade;

[0010] Step 5: pouring concrete for the second time on the other side of the expansion joint to form a second concrete block.

[0011] Optionally, in the expansion joint construction method, the vertical portion of the L-shaped positioning structure is a wooden box, the horizontal portion of the L-shaped positioning structure is a wooden strip, and one end of the wooden strip is fixedly connected to one side of the wooden box;

[0012] The cross-sectional dimension of the wooden box is consistent with that of the extruded board, and the thickness of the wooden strip is consistent with that of the plastic strip.

[0013] Optionally, in the expansion joint construction method, the process of placing an L-shaped positioning structure at one end of the extruded board facing the facade includes:

[0014] Providing a wooden box, and placing one side of the wooden box against the extruded board, and the other side of the wooden box against the first concrete block;

[0015] Providing a wooden strip, and placing one end of the wooden strip against the wooden box and the other end against the first concrete block;

[0016] The wooden strip is fixedly connected to the wooden box.

[0017] Optionally, in the expansion joint construction method, the process of placing an L-shaped positioning structure at one end of the extruded board facing the facade includes:

[0018] Provide a wooden box and a wooden strip respectively;

[0019] Place one end of the wooden strip against the wooden box, and make the lower surface of the wooden strip flush with the lower surface of the wooden box;

[0020] Fixedly connecting the wooden strip to the wooden box;

[0021] The lower surface of the wooden box is placed against the first concrete block, and the other side of the wooden box is placed against the extruded board.

[0022] Optionally, in the expansion joint construction method, the L-shaped positioning structure is a steel plate with an L-shaped cross-section, the cross-sectional size of the vertical part of the steel plate is consistent with the cross-sectional size of the extruded plate, and the thickness of the horizontal part of the steel plate is consistent with the thickness of the plastic strip.

[0023] Optionally, in the expansion joint construction method, the process of placing an L-shaped positioning structure at one end of the extruded board facing the facade includes:

[0024] An L-shaped locating structure is provided, and a vertical portion of the L-shaped locating structure is abutted against an end of the extruded board.

[0025] Optionally, in the expansion joint construction method, after a second concrete pouring is performed on the other side of the expansion joint to form a second concrete block, the method further includes: replacing the plastic strip with a decorative strip.

[0026] Correspondingly, the present invention also provides an expansion joint, which includes: an extruded plate, an L-shaped positioning structure and a decorative strip;

[0027] The extruded board is arranged along the length direction of the expansion joint, and the end of the extruded board maintains a predetermined distance from the facade of the building;

[0028] The L-shaped positioning structure and the decorative strip are both arranged between the end of the extruded board and the facade. The L-shaped positioning structure includes a vertical part and a horizontal part. The vertical part of the L-shaped positioning structure abuts against the end of the extruded board, and the horizontal part of the L-shaped positioning structure abuts against one end of the decorative strip. The other end of the decorative strip extends to the facade of the building.

[0029] Optionally, in the expansion joint, the vertical portion of the L-shaped positioning structure is a wooden box, the horizontal portion of the L-shaped positioning structure is a wooden strip, and the wooden box and the wooden strip are fixedly connected;

[0030] The thickness of the wooden strip is consistent with the thickness of the decorative strip, and the width of the wooden box is consistent with the width of the expansion joint.

[0031] Optionally, in the expansion joint, the width of the extruded plate is consistent with the width of the expansion joint.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] 1. The construction method of the expansion joint provided by the present invention adopts an extruded board as a template of the expansion joint, and sequentially arranges an L-shaped positioning structure and a plastic strip between the end of the extruded board and the facade of the building, so that the width of the expansion joint on the facade is equal to the thickness of the plastic strip, thereby avoiding the expansion joint width being too large to affect the decoration effect of the facade of the plain concrete building;

[0034] 2. The construction method of the expansion joint provided by the present invention uses decorative strips instead of plastic strips after the concrete pouring is completed, so that the facade is smoother and more beautiful;

[0035] 3. The expansion joint construction method provided by the present invention not only has stable construction quality but also has better construction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram corresponding to step 5 in the construction method of the expansion joint according to an embodiment of the present invention;

[0037] Figure 2 It is a structural schematic diagram corresponding to step six in the construction method of the expansion joint according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The expansion joint and the construction method thereof proposed by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Please refer to Figure 1 , which is a structural schematic diagram corresponding to step 5 in the construction method of the expansion joint of the embodiment of the present invention. Figure 1 As shown, the construction method of the expansion joint includes:

[0040] Step 1: Determine the location and dimensions of the expansion joint;

[0041] Step 2: pouring concrete for the first time on one side of the expansion joint to form a first concrete block 1;

[0042] Step 3: placing an extruded board 2 on the side of the first concrete block 1 facing the expansion joint, with the end of the extruded board 2 maintaining a predetermined distance from the facade of the building (not shown in the figure);

[0043] Step 4: placing an L-shaped positioning structure 3 and a plastic strip 4 in sequence at one end of the extruded board 2 facing the exterior facade, wherein the L-shaped positioning structure 3 includes a vertical portion and a horizontal portion, wherein the vertical portion of the L-shaped positioning structure 3 abuts against the end of the extruded board 2, and the horizontal portion of the L-shaped positioning structure 13 abuts against one end of the plastic strip 4, and the other end of the plastic strip 4 extends to the exterior facade;

[0044] Step 5: pouring concrete for the second time on the other side of the expansion joint to form a second concrete block 5.

[0045] Specifically, first, determine the location and size of the expansion joint. In this process, lay out the line according to the location and size of the expansion joint to be left, and draw a marked straight line.

[0046] Next, the first concrete pouring is performed on one side of the expansion joint to form a first concrete block 1. After the first concrete block 1 reaches a preset strength, the formwork is removed.

[0047] Then, the extruded board 2 is placed on one side of the first concrete block 1. The extruded board 2 is used as a template and prefabricated according to the outer dimensions of the expansion joint. The expansion joint is generally in the shape of a long strip, and its cross section is generally rectangular. Correspondingly, the extruded board 2 is also in the shape of a long strip, and its cross section is rectangular.

[0048] like Figure 1As shown, the extruded board 2 is located in the expansion joint, its width is consistent with the width D of the expansion joint, its length direction is consistent with the extension direction of the expansion joint, and the end of the extruded board 2 maintains a predetermined distance from the facade of the building, and the predetermined distance is L1+L2.

[0049] In this embodiment, the width D of the expansion joint is 100 mm, and the predetermined spacing (L1+L2) is 180 mm.

[0050] Afterwards, an L-shaped positioning structure 3 and a plastic strip 4 are placed in sequence on one end of the extruded board 2 facing the exterior facade.

[0051] like Figure 1 As shown, in the extension direction of the expansion joint, an extruded board 2, an L-shaped positioning structure 3 and a plastic strip 4 are arranged in sequence, the vertical part of the L-shaped positioning structure 3 abuts against the end of the extruded board 2, one end of the plastic strip 4 abuts against the horizontal part of the positioning structure 3, and the other end of the plastic strip 4 extends to the facade.

[0052] In this embodiment, the vertical part of the L-shaped positioning structure 3 is a wooden box 3a, and the horizontal part of the L-shaped positioning structure 3 is a wooden strip 3b. The bottom of the wooden box 3a is flush with the bottom of the wooden strip 3b, that is, the lower surface of the wooden strip 3b is in the same horizontal plane as the lower surface of the wooden box 3a, and one end of the wooden strip 3b is fixedly connected to one side of the wooden box 3a. The wooden strip 3b is fixedly connected to the wooden box 3a by a connecting piece (not shown in the figure), and the connecting piece can be a nail, an angle bracket or other connecting pieces.

[0053] In this embodiment, the wooden box 3a is a hollow structure with a cavity formed therein. In other embodiments, the wooden box 3a may also be a solid structure.

[0054] In this embodiment, the width of the wooden box 3a is consistent with the width D of the expansion joint, and the thickness of the wooden strip 3b is smaller than the width of the wooden box 3a.

[0055] Preferably, the cross-sectional dimensions of the wooden box 3a and the extruded board 2 are consistent with the cross-sectional dimensions of the expansion joint, and the thickness of the wooden strip 3b is consistent with the thickness of the plastic strip 4. In this way, it can be ensured that the expansion joint is straight after pouring, which is conducive to the quality control of the expansion joint construction.

[0056] In this embodiment, the length L1 and width of the wooden box 3a are both 100 mm, and the thickness d1 of the wooden strip 3b and the plastic strip 4 are both 20 mm.

[0057] It should be noted that the sizes of the above-mentioned extruded board 2, wooden box 3a, wooden strips 3b and plastic strips 4 are only examples and not limitations. Those skilled in the art can set the sizes of the extruded board 2, wooden box 3a, wooden strips 3b and plastic strips 4 according to the width of the expansion joint and the width of the facade gap.

[0058] The process of placing the L-shaped positioning structure 3 at one end of the extruded board 2 facing the facade includes: providing a wooden box 3a, and placing one side of the wooden box 3a against the extruded board 2, and the other side against the first concrete block 1; providing a wooden strip 3b, and placing one end of the wooden strip 3b against the wooden box 3a, and the other side against the first concrete block 1; and fixing the wooden strip 3b to the wooden box 3a.

[0059] In another embodiment, the process of placing the L-shaped positioning structure 3 at one end of the extruded board 2 facing the facade includes: providing a wooden box 3a and a wooden strip 3b respectively; placing one end of the wooden strip 3b against the wooden box 3a, and making the lower surface of the wooden strip 3b flush with the lower surface of the wooden box 3a; fixing the wooden strip 3b to the wooden box 3a; placing the lower surface of the wooden box 3a against the first concrete block 1, and the other side against the extruded board 2.

[0060] In this embodiment, the L-shaped positioning structure 3 is formed by a wooden box 3a and a wooden strip 3b fixedly connected, and the wooden box 3a and the wooden strip 3b are both very common materials. In other embodiments, other materials can be used to form the L-shaped positioning structure 3, or an integrated L-shaped positioning structure 3 can be directly used, such as a steel plate with an L-shaped cross-section. As long as the L-shaped positioning structure 3 has a certain structural strength, is not easily deformed, and the size of the L-shaped positioning structure 3 matches the size of the expansion joint.

[0061] In another embodiment, the L-shaped positioning structure 3 is a steel plate with an L-shaped cross-section, the cross-sectional size of the vertical portion of the steel plate is consistent with the cross-sectional size of the extruded board 2, and the thickness of the horizontal portion of the steel plate is consistent with the thickness of the plastic strip 4. The process of placing the L-shaped positioning structure 3 at one end of the extruded board 2 facing the facade includes: providing the L-shaped positioning structure 3, and abutting the vertical portion of the L-shaped positioning structure 3 against the end of the extruded board 2, and abutting the horizontal portion of the L-shaped positioning structure 3 against the side of the first concrete block 1.

[0062] Thereafter, a second concrete pouring is performed on the other side of the expansion joint to form a second concrete block 5 .

[0063] After the second concrete block 5 reaches the preset strength, step six is ​​performed, during which the plastic strip 4 is removed and replaced by a later decorative strip 6 .

[0064] Please refer to Figure 2 , which is a structural schematic diagram corresponding to step 6 in the construction method of the expansion joint of the embodiment of the present invention. Figure 2 As shown, the second concrete block 5 has a raised structure on the side facing the first concrete block 1, and the raised structure corresponds to the horizontal part of the L-shaped positioning structure 3 and the position of the decorative strip 6, close to the facade of the building. The length L2 and width d2 of the raised structure are both 80 mm. Due to the existence of the raised structure, the expansion joint does not extend directly to the facade of the building. The facade only has a gap with a width of 20 mm, and the gap is filled with a decorative strip 6.

[0065] At this point, the construction of the expansion joint is completed. The width of the expansion joint is 100 mm, which meets the requirements of the specification. The expansion joint is provided with an extruded plate 2 of equal width. The outer side of the expansion joint is close to the facade of the building. The width of the gap close to the facade is very narrow and can be hidden by a decorative strip, which is conducive to the uniformity of the facade decoration effect of the plain concrete building and makes the facade of the building smoother and more beautiful.

[0066] In the expansion joint construction method provided in this embodiment, segmented construction is carried out with the expansion joint as the dividing line. First, the first concrete pouring area construction is carried out on one side of the expansion joint (forming a first concrete block 1), and then the extruded board 2, L-shaped positioning structure 3 and plastic strip 4 are placed in the area of ​​the expansion joint in sequence. Then, the second concrete pouring area construction is carried out on the other side of the expansion joint (forming a second concrete block 5), and finally a hidden expansion joint is formed between the first concrete block 1 and the second concrete block 5.

[0067] Correspondingly, the present invention also provides an expansion joint, which includes: an extruded board 2, an L-shaped positioning structure 3 and a decorative strip 6; the extruded board 2 is arranged along the length direction of the expansion joint, and the end of the extruded board 2 maintains a predetermined distance from the facade of the building, the L-shaped positioning structure 3 and the decorative strip 6 are both arranged between the end of the extruded board 2 and the facade, the L-shaped positioning structure 3 includes a vertical part and a horizontal part, the vertical part of the L-shaped positioning structure 3 is against the end of the extruded board 2, the horizontal part of the L-shaped positioning structure 13 is against one end of the decorative strip 6, and the other end of the decorative strip 6 extends to the facade of the building.

[0068] Among them, the vertical part of the L-shaped positioning structure 3 is a wooden box 3a, the horizontal part of the L-shaped positioning structure 3 is a wooden strip 3b, the wooden box 3a and the wooden strip 3b are fixedly connected, the thickness of the wooden strip 3b is consistent with the thickness of the decorative strip 6, and the widths of the extruded board 2 and the wooden box 3a are consistent with the width D of the expansion joint.

[0069] The L-shaped positioning structure 3 may also be a steel plate with an L-shaped cross-section, the cross-sectional size of the vertical portion of the steel plate is consistent with the cross-sectional size of the extruded plate 2 , and the thickness of the horizontal portion of the steel plate is consistent with the thickness of the decorative strip 6 .

[0070] In summary, in the expansion joint and its construction method provided by the present invention, an extruded board is used as a template for the expansion joint, and an L-shaped positioning structure and a plastic strip are sequentially arranged between the end of the extruded board and the facade of the building, so that the width of the expansion joint on the facade is equal to the thickness of the plastic strip, and the plastic strip can be hidden by using a decorative strip instead of the plastic strip, thereby making the facade of the building smoother and more beautiful.

[0071] The above content is a further detailed description of the present application in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A method for constructing an expansion joint, characterized in that: include: Step 1: Determine the location and dimensions of the expansion joint; Step 2: pouring concrete for the first time on one side of the expansion joint to form a first concrete block; Step 3: placing an extruded board on the side of the first concrete block facing the expansion joint, with the end of the extruded board maintaining a predetermined distance from the facade of the building; Step 4: placing an L-shaped positioning structure and a plastic strip in sequence at one end of the extruded board facing the exterior facade, wherein the L-shaped positioning structure includes a vertical portion and a horizontal portion, wherein the vertical portion of the L-shaped positioning structure abuts against the end of the extruded board, and the horizontal portion of the L-shaped positioning structure abuts against the end of the plastic strip, and the other end of the plastic strip extends to the exterior facade; Step 5: pouring concrete for the second time on the other side of the expansion joint to form a second concrete block.

2. The expansion joint construction method according to claim 1, characterized in that: The vertical part of the L-shaped positioning structure is a wooden box, and the horizontal part of the L-shaped positioning structure is a wooden strip, one end of which is fixedly connected to one side of the wooden box; The cross-sectional dimension of the wooden box is consistent with that of the extruded board, and the thickness of the wooden strip is consistent with that of the plastic strip.

3. The expansion joint construction method according to claim 2, characterized in that: The process of placing an L-shaped positioning structure at one end of the extruded board facing the facade comprises: Providing a wooden box, and placing one side of the wooden box against the extruded board, and the other side of the wooden box against the first concrete block; Providing a wooden strip, and placing one end of the wooden strip against the wooden box and the other end against the first concrete block; The wooden strip is fixedly connected to the wooden box.

4. The expansion joint construction method according to claim 2, characterized in that: The process of placing an L-shaped positioning structure at one end of the extruded board facing the facade comprises: Provide a wooden box and a wooden strip respectively; Place one end of the wooden strip against the wooden box, and make the lower surface of the wooden strip flush with the lower surface of the wooden box; Fixedly connecting the wooden strip to the wooden box; The lower surface of the wooden box is placed against the first concrete block, and the other side of the wooden box is placed against the extruded board.

5. The expansion joint construction method according to claim 1, characterized in that: The L-shaped positioning structure is a steel plate with an L-shaped cross-section, the cross-sectional size of the vertical portion of the steel plate is consistent with the cross-sectional size of the extruded plate, and the thickness of the horizontal portion of the steel plate is consistent with the thickness of the plastic strip.

6. The expansion joint construction method according to claim 5, characterized in that: The process of placing an L-shaped positioning structure at one end of the extruded board facing the facade comprises: An L-shaped locating structure is provided, and a vertical portion of the L-shaped locating structure is abutted against an end of the extruded board.

7. The expansion joint construction method according to claim 1, characterized in that: After a second concrete pouring is performed on the other side of the expansion joint to form a second concrete block, the method further includes: replacing the plastic strip with a decorative strip.

8. An expansion joint of the expansion joint construction method according to claim 1, characterized in that: include: Extruded panels, L-shaped positioning structures and decorative strips; The extruded board is arranged along the length direction of the expansion joint, and the end of the extruded board maintains a predetermined distance from the facade of the building; The L-shaped positioning structure and the decorative strip are both arranged between the end of the extruded board and the facade. The L-shaped positioning structure includes a vertical part and a horizontal part. The vertical part of the L-shaped positioning structure abuts against the end of the extruded board, and the horizontal part of the L-shaped positioning structure abuts against one end of the decorative strip. The other end of the decorative strip extends to the facade of the building.

9. The expansion joint according to claim 8, characterized in that: The vertical part of the L-shaped positioning structure is a wooden box, the horizontal part of the L-shaped positioning structure is a wooden strip, and the wooden box and the wooden strip are fixedly connected; The thickness of the wooden strip is consistent with the thickness of the decorative strip, and the width of the wooden box is consistent with the width of the expansion joint.

10. The expansion joint according to claim 8, characterized in that: The width of the extruded plate is consistent with the width of the expansion joint.

Images