A composite exterior wall structure of precast concrete blocks and fair-faced bricks and its construction method

Abstract

The application discloses a fair-faced concrete prefabricated block and fair-faced brick composite outer wall structure and a construction method, relates to the technical field of fair-faced concrete, and comprises a ground beam, prefabricated fair-faced bricks and prefabricated fair-faced concrete blocks. The top of the ground beam is provided with first grouting holes. The prefabricated fair-faced bricks are provided with U-shaped grooves, rectangular grooves, end pouring grooves and second grouting holes. The prefabricated fair-faced concrete blocks comprise block bodies, cover plates and U-shaped grooves. The ground beam, the prefabricated fair-faced bricks and the prefabricated fair-faced concrete blocks are spliced with each other and are poured into an outer wall structure by pouring fair-faced concrete slurry into the first grouting holes, the second grouting holes and the end pouring grooves. The application can effectively improve the construction quality and service life of the fair-faced concrete prefabricated block and fair-faced brick composite outer wall structure.

Description

Technical Field

[0001] This invention relates to the field of fair-faced concrete technology, specifically to a composite exterior wall structure and construction method of fair-faced concrete precast blocks and fair-faced bricks. Background Technology

[0002] Currently, the construction of fair-faced brick-concrete composite exterior walls usually involves cast-in-place concrete and manual masonry. The following problems exist in the construction: (1) The quality of masonry depends on the workers' experience, which makes it impossible to guarantee the quality of the exterior wall; (2) In order to achieve a high quality standard, manual masonry is cumbersome and the construction period is long; (3) During the masonry process, grout leakage is a common phenomenon, which leads to the contamination of the masonry wall surface, which is difficult to clean thoroughly and affects the aesthetics of the exterior wall; (4) The exterior walls built by the traditional manual masonry method are not strong enough and have a short service life. Summary of the Invention

[0003] The present invention provides a composite exterior wall structure and construction method of precast concrete blocks and fair-faced bricks, with the aim of solving the technical problems described in (1)-(4) of the prior art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A composite exterior wall structure of precast concrete blocks and fair-faced bricks includes a ground beam, precast fair-faced bricks, and precast fair-faced concrete blocks. The ground beam has several vertically arranged first grouting holes evenly distributed on its top. Each precast fair-faced brick has two outward-facing U-shaped grooves mirrored on both sides of its top edge. Each U-shaped groove is formed by a first protruding ridge structure integrally connected to the top of the precast fair-faced brick. The bottom edge of each precast fair-faced brick has a rectangular groove, formed by a second protruding ridge structure integrally connected to the bottom of the precast fair-faced brick. The rectangular groove is used to lock two adjacent blocks below. The precast fair-faced concrete bricks have adjacent U-shaped grooves, and the outer end of the precast fair-faced concrete bricks at the outer end of the U-shaped grooves are provided with end casting grooves. A second grouting hole is provided through the bottom of each U-shaped groove. The precast fair-faced concrete block includes a block body, the outer end of the block body extends downward to form a cover plate that matches the end casting groove, and the bottom end of the block body is provided with a U-shaped groove that matches the convex ridge structure of the U-shaped groove. The ground beam, precast fair-faced concrete bricks, and precast fair-faced concrete blocks are spliced ​​together and cast into an exterior wall structure by fair-faced concrete slurry entering the first grouting hole, the second grouting hole, and the end casting groove.

[0006] Preferably, the distance between the outer wall surface of the U-shaped groove and the side surface of the precast clear water brick is the same as the wall thickness of the rectangular groove, the distance between the relative walls of the two U-shaped grooves of the same precast clear water brick is twice the wall thickness of the rectangular groove, and the outer surface of the side wall of the rectangular groove is coplanar with the side surface of the brick.

[0007] Preferably, the length of the brick is twice its width. When the end casting grooves of two precast fair-faced bricks are joined together, and an upper precast fair-faced brick is placed on top of the two precast fair-faced bricks, the rectangular groove at the bottom of the upper precast fair-faced brick simultaneously locks the U-shaped groove on the right side of the top of the lower left precast fair-faced brick and the U-shaped groove on the left side of the top of the lower right precast fair-faced brick. When locked, the groove walls of the end casting grooves of the lower left precast fair-faced brick and the lower right precast fair-faced brick are tightly abutted and form a complete casting groove.

[0008] Preferably, the spacing of the first grouting holes matches the size of the precast fair-faced brick and the spacing of the two second grouting holes of the same precast fair-faced brick. When several precast fair-faced bricks are arranged side by side on the top of the ground beam and each second grouting hole is aligned vertically with the first grouting hole, the ends of adjacent precast fair-faced bricks abut against each other.

[0009] Preferably, the width of the precast fair-faced concrete block is consistent with the inner width of the rectangular groove, the inner surface of the cover plate is provided with several arc-shaped grooves along the longitudinal direction, the bottom end of the cover plate abuts against the bottom of the end casting groove, the outer surface of the cover plate is flush with the end surface of the brick, and the rear wall thickness of the U-shaped groove is consistent with the groove wall thickness of the rectangular groove.

[0010] Preferably, the outer edge of the U-shaped groove is flush with the side wall surface of the block, and a third grouting hole is provided on the block. When the precast fair-faced concrete block is engaged with the U-shaped groove on one side of the top of the precast fair-faced brick below through the U-shaped groove, the third grouting hole is aligned with the second grouting hole of the precast fair-faced brick below.

[0011] A construction method for a composite exterior wall structure of precast concrete blocks and fair-faced bricks includes the following steps:

[0012] Step 1: Install the ground beam;

[0013] Step 2: Initially assemble precast fair-faced bricks at the top of the ground beam. During the assembly process, intermittently assemble precast fair-faced concrete blocks at the ends of the exterior wall structure.

[0014] Step 3: Pour fair-faced concrete to form the exterior wall structure.

[0015] Preferably, in step 2, the precast fair-faced concrete bricks are spliced ​​in an alternating arrangement. During the splicing process, the rectangular groove of the upper layer of precast fair-faced concrete bricks locks the adjacent U-shaped grooves of the lower left and right precast fair-faced concrete bricks, and the adjacent end casting grooves abut against each other to form a complete casting groove. During the masonry process, the second grouting holes of the upper and lower layers are aligned one above the other. The fair-faced concrete blocks are spliced ​​at the ends of the exterior wall structure. The top of the block is engaged with the rectangular groove at the bottom of the upper precast fair-faced concrete brick, and the U-shaped groove at the bottom of the block is engaged with the protruding ridge structure of the U-shaped groove at the top of the adjacent lower precast fair-faced concrete brick. The arc-shaped groove and the corresponding end casting groove form an end casting space.

[0016] Preferably, in step 2, in order to give the spliced ​​structure preliminary strength, when splicing the upper and lower layers of precast fair-faced bricks, a set amount of fair-faced concrete slurry is placed in the U-shaped groove at the top of the lower layer of precast fair-faced bricks.

[0017] Preferably, in step 3, through-steel bars are inserted into several opposing second grouting holes, first grouting holes, and several opposing third grouting holes, second grouting holes, and first grouting holes. A grout pipe is used to inject fair-faced concrete grout from the upper end of the second or third grouting hole at the top of the exterior wall structure. The grout enters through several opposing second grouting holes, first grouting holes, or several opposing third grouting holes, second grouting holes, and first grouting holes, and enters the space between the U-shaped groove and the rectangular groove, the complete casting groove, and the end casting space. Finally, the exterior wall structure is formed after the grout reaches the set strength.

[0018] The beneficial effects of the present invention, a composite exterior wall structure and construction method of precast concrete blocks and fair-faced bricks, are as follows:

[0019] 1. This invention uses a rectangular groove to lock two adjacent U-shaped grooves of precast fair-faced bricks below. On the one hand, this allows the precast fair-faced bricks to be tightly connected and positioned together. On the other hand, after the rectangular groove locks the U-shaped groove, the end casting grooves of the two adjacent precast fair-faced bricks below are joined to form a complete casting groove. The grout entering the complete casting groove can achieve a firm connection between the ends of the adjacent precast fair-faced bricks. The U-shaped groove connects the upper and lower adjacent precast fair-faced bricks. The grout entering through the second grouting hole fills the gap between the rectangular groove and the U-shaped groove and fills the complete casting groove, thus achieving a firm connection between the upper, lower, left, and right precast fair-faced bricks. Because the first and second grouting holes, the third and second grouting holes, and the first grouting hole are vertically aligned during construction, the grout that enters will form a concrete column structure after molding, further strengthening the stability of the exterior wall structure. In a further embodiment, longitudinal reinforcing bars are inserted into the first and second grouting holes, the third and second grouting holes, and the first grouting hole, which are positioned vertically opposite each other. The longitudinal reinforcing bars make the resulting concrete column structure more robust, thereby further strengthening the structural integrity of the exterior wall. Because the precast exposed bricks and precast concrete blocks are interlocked in a closed manner, the probability of grout leakage is very low, preserving the original appearance of the exterior wall structure and avoiding the tedious subsequent cleaning process.

[0020] 2. In this invention, precast fair-faced bricks and precast fair-faced concrete blocks are all securely connected by interlocking fasteners, forming a closed casting cavity and strengthening the exterior wall structure. This design also eliminates reliance on worker experience, ensuring construction quality. The exterior wall structure has high strength and a significantly extended service life.

[0021] 3. To ensure the spliced ​​structure has initial strength, this invention involves placing a predetermined amount of fair-faced concrete slurry into the U-shaped groove at the top of the lower layer of precast fair-faced bricks during the splicing process. This predetermined amount is determined based on actual construction conditions and can also be measured using a pre-measured container. The slurry is sufficient to bond the bottom of the upper rectangular groove to the bottom of the lower U-shaped groove. During subsequent pouring, the slurry is then used to fill any areas without slurry. This design significantly reduces construction difficulty, as workers do not need to meticulously control the amount of slurry added to meet process standards. They only need to ensure that the added slurry bonds the bottoms of the U-shaped and rectangular grooves. The aim is to provide the exterior wall structure with initial structural strength before pouring, thereby significantly improving construction efficiency and shortening the construction period. Attached Figure Description

[0022] Figure 1 This is a structural diagram illustrating the construction process of the exterior wall structure of this invention;

[0023] Figure 2 This is the present invention. Figure 1A schematic diagram of the structure after removing the precast fair-faced concrete blocks;

[0024] Figure 3 This is a schematic diagram of the prefabricated fair-faced brick splicing structure of the present invention;

[0025] Figure 4 This is a front view structural diagram of the prefabricated fair-faced brick of the present invention;

[0026] Figure 5 This is a top view structural diagram of the prefabricated fair-faced brick of the present invention;

[0027] Figure 6 This is a bottom view structural diagram of the prefabricated fair-faced brick of the present invention;

[0028] Figure 7 This is a side view of the prefabricated water-repellent brick of the present invention.

[0029] Figure 8 This is a front view structural diagram of the precast fair-faced concrete block of the present invention;

[0030] Figure 9 This is a bottom view structural diagram of the precast fair-faced concrete block of the present invention;

[0031] Figure 10 This is a side view of the precast fair-faced concrete block of the present invention.

[0032] Figure 11 This is a side view of the structure of the precast fair-faced concrete block and the precast fair-faced brick of the present invention.

[0033] 1. Ground beam; 11. First grouting hole; 2. Precast fair-faced concrete brick; 21. Second grouting hole; 22. Brick body; 23. Rectangular groove; 24. U-shaped groove; 241. U-shaped groove on the left side; 242. U-shaped groove on the right side; 25. End casting groove; 3. Precast fair-faced concrete block; 31. Third grouting hole; 32. Cover plate; 321. Arc-shaped groove; 33. Block body; 34. U-shaped groove; 35. Rear groove wall; 4. Reinforcing steel. Detailed Implementation

[0034] The following description provides a detailed explanation of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limiting this invention.

[0036] Example 1

[0037] A composite exterior wall structure of precast concrete blocks and fair-faced bricks, such as Figure 1-11 As shown, the structure includes a ground beam 1, precast fair-faced concrete bricks 2, and precast fair-faced concrete blocks 3. The ground beam 1 has several vertically arranged first grouting holes 11 evenly distributed on its top. The top of each precast fair-faced concrete brick 2 has two outward-facing U-shaped grooves 24 mirror-shaped on both sides. Each U-shaped groove 24 is formed by a first protruding ridge structure integrally connected to the top of the precast fair-faced concrete brick. The bottom edge of each precast fair-faced concrete brick 2 has a rectangular groove 23, which is formed by a second protruding ridge structure integrally connected to the bottom of the precast fair-faced concrete brick. The rectangular groove 23 is used to lock the adjacent U-shaped grooves 24 of two adjacent precast fair-faced concrete bricks 2 below (e.g.,...). Figure 2 As shown), the outer end of the U-shaped groove 24 is provided with an end casting groove 25 at the end of the precast fair-faced brick 2 (as shown). Figure 5 , 7 As shown), each U-shaped groove 24 has a through second grouting hole 21 at its bottom (as shown). Figure 1 , 5 As shown in Figure 6); the precast fair-faced concrete block 3 includes block 33 (as shown in Figure 6). Figure 1 , 8 As shown in -10), the outer end of the block 33 extends downward to form a cover plate 32 that matches the end casting groove 25. The bottom end of the block 33 is provided with a U-shaped groove 34 that matches the convex ridge structure of the U-shaped groove 24. The ground beam 1, precast fair-faced bricks 2, and precast fair-faced concrete blocks 3 are spliced ​​together and cast into an outer wall structure by fair-faced concrete slurry entering the first grouting hole 11, the second grouting hole 21, and the end casting groove 25.

[0038] In this embodiment, the rectangular groove locks the adjacent U-shaped grooves of two precast fair-faced bricks below. On the one hand, this allows the precast fair-faced bricks to be tightly connected and positioned together. On the other hand, after the rectangular groove locks the U-shaped groove, the end casting grooves of the two adjacent precast fair-faced bricks below are joined to form a complete casting groove. The grout entering the complete casting groove can achieve a firm connection between the ends of the adjacent precast fair-faced bricks. The U-shaped groove connects the upper and lower adjacent precast fair-faced bricks. The grout entering through the second grouting hole fills the gap between the rectangular groove and the U-shaped groove and fills the complete casting groove, thereby achieving a firm connection between the upper, lower, left, and right precast fair-faced bricks. Since the first and second grouting holes, the third and second grouting holes, and the first grouting hole are vertically opposite each other during construction, the grout that enters will form a concrete column structure after molding, further strengthening the stability of the exterior wall structure. In a further embodiment, longitudinal reinforcing bars are inserted into the first and second grouting holes, the third and second grouting holes, and the first grouting hole, which are positioned vertically opposite each other. The longitudinal reinforcing bars make the resulting concrete column structure more robust, thereby further strengthening the structural integrity of the exterior wall. Because the precast exposed bricks and precast concrete blocks are interlocked in a closed manner, the probability of grout leakage is very low, preserving the original appearance of the exterior wall structure and avoiding the tedious subsequent cleaning process.

[0039] It should be noted that the contact surface between the bottom layer of precast fair-faced bricks and the ground beam can be completed by manual masonry. During masonry, the mortar fills the rectangular groove at the bottom of the precast fair-faced bricks, leaving only the opening of the second grouting hole. This is to prevent grout leakage during subsequent pouring, and to ensure the stability of the foundation structure after the mortar entering the first grouting hole through the second grouting hole is formed.

[0040] Example 2

[0041] Based on Example 1, this example discloses:

[0042] like Figure 5 , 6 As shown, the distance between the outer wall surface of the U-shaped groove 24 and the side surface of the precast fair-faced brick 22 is the same as the wall thickness of the rectangular groove 23. The distance between the relative walls of the two U-shaped grooves 24 of the same precast fair-faced brick 2 is twice the wall thickness of the rectangular groove 23. The outer surface of the side wall of the rectangular groove 23 is coplanar with the side surface of the brick 22. This design facilitates precise interlocking between precast fair-faced bricks.

[0043] Example 3

[0044] Based on Example 2, this example discloses:

[0045] like Figure 3-7As shown, the length of the brick body 22 is twice its width. When the end casting grooves 25 of the two precast fair water bricks 2 are joined together, and the upper layer of precast fair water brick 2 is placed on top of the two precast fair water bricks, the rectangular groove 23 at the bottom of the upper layer of precast fair water brick 2 simultaneously locks the U-shaped groove 242 on the right side of the top of the lower left precast fair water brick 2 and the U-shaped groove 241 on the left side of the top of the lower right precast fair water brick 2. When locked, the groove walls of the end casting grooves 25 of the lower left precast fair water brick 2 and the lower right precast fair water brick 2 are tightly abutted and form a complete casting groove.

[0046] Example 4

[0047] Based on Example 3, this example discloses:

[0048] like Figure 1 As shown, the spacing of the first grouting hole 11 matches the size of the precast clear water brick 2 and the spacing of the two second grouting holes 21 of the same precast clear water brick 2. When several precast clear water bricks 2 are arranged side by side on the top of the ground beam 1 and each second grouting hole 21 is aligned vertically with the first grouting hole 11, the ends of adjacent precast clear water bricks 2 abut against each other.

[0049] Example 5

[0050] Based on Example 4, this example discloses:

[0051] like Figure 1 , 8 As shown in -11, the width of the precast fair-faced concrete block 3 is consistent with the inner width of the rectangular groove 23. The inner surface of the cover plate 32 is provided with several arc-shaped grooves 321 along the longitudinal direction. The bottom end of the cover plate 32 abuts against the bottom of the end casting groove 25. The outer surface of the cover plate 32 is flush with the end surface of the brick body 22. The thickness of the rear wall of the U-shaped groove 34 is consistent with the thickness of the groove wall of the rectangular groove.

[0052] Example 6

[0053] Based on Example 5, this example discloses:

[0054] like Figure 1 , 8 As shown in -11, the outer edge of the U-shaped groove 34 is flush with the side wall surface of the block 33. A third grouting hole 31 is also provided on the block 33. When the precast fair-faced concrete block 3 is engaged with the U-shaped groove 24 on one side of the top of the precast fair-faced brick 2 below through the U-shaped groove 34, the third grouting hole 31 is aligned with the second grouting hole 21 of the precast fair-faced brick below.

[0055] Example 7

[0056] Based on Example 6, this example discloses:

[0057] A construction method for a composite exterior wall structure of precast concrete blocks and fair-faced bricks, such as... Figure 1-11 As shown, it includes the following steps:

[0058] Step 1: Construct ground beam 1;

[0059] Step 2: Initially assemble precast fair-faced concrete bricks 2 at the top of the ground beam 1. During the assembly process, intermittently assemble precast fair-faced concrete blocks 3 at the ends of the exterior wall structure, such as... Figure 1 As shown;

[0060] Step 3: Pour fair-faced concrete to form the exterior wall structure.

[0061] Example 8

[0062] Based on Example 7, this example discloses:

[0063] like Figure 1-11 As shown, in step 2, the precast fair-faced concrete bricks 2 are spliced ​​in an alternating manner. During the splicing process, the rectangular groove 23 of the upper layer of precast fair-faced concrete bricks locks the adjacent U-shaped grooves 24 of the lower left and right precast fair-faced concrete bricks 2, and the adjacent end casting grooves 25 abut against each other to form a complete casting groove. During the masonry process, the second grouting holes 21 of the upper and lower layers are aligned one above the other. The fair-faced concrete blocks 3 are spliced ​​at the ends of the exterior wall structure. The top of the block is engaged with the rectangular groove 23 at the bottom of the upper precast fair-faced concrete brick 2. The U-shaped groove 34 at the bottom of the block 33 is engaged with the protruding ridge structure of the U-shaped groove 24 at the top of the adjacent lower precast fair-faced concrete brick 2. The arc groove 321 and the corresponding end casting groove 25 form an end casting space.

[0064] Example 9

[0065] Based on Example 8, this example discloses:

[0066] like Figure 1-11 As shown, in step 2, to give the spliced ​​structure preliminary strength, when splicing the upper and lower layers of precast fair-faced bricks 2, a set amount of fair-faced concrete grout is placed in the U-shaped groove at the top of the lower layer of precast fair-faced bricks. This set amount is determined based on the actual construction situation, and is sufficient to bond and fix the bottom of the upper rectangular groove to the bottom of the lower U-shaped groove. During subsequent pouring, the grout is used to fill the areas where no grout has been applied. This design can significantly reduce the difficulty of construction. The operators do not need to carefully control the amount of grout added to ensure that the process standards are met. They only need to ensure that the added grout can bond the bottom of the U-shaped groove and the bottom of the rectangular groove (note that the grouting hole port should not be blocked). The purpose is to give the exterior wall structure preliminary structural strength before pouring, which can also greatly improve construction efficiency and shorten the construction period.

[0067] Example 10

[0068] Based on Example 9, this example discloses:

[0069] like Figure 1-11 As shown, in step 3, through-steel bars 4 are inserted into several opposing second grouting holes 21, first grouting holes 11, and several opposing third grouting holes 31, second grouting holes 21, and first grouting holes 11. Fair-faced concrete grout is injected through a grout pipe from the upper end of the second grouting hole 21 or the third grouting hole 31 at the top of the exterior wall structure. The grout enters through several opposing second grouting holes 21, first grouting holes 11 or several opposing third grouting holes 31, second grouting holes 21, and first grouting holes 11, and enters the space between the U-shaped groove 24 and the rectangular groove 23, the complete casting groove, and the end casting space. Finally, the exterior wall structure is formed after the grout reaches the set strength.

Claims

1. A composite exterior wall structure of precast concrete blocks and fair-faced bricks, characterized in that: The utility model provides a kind of prefabricated fair-faced concrete block, prefabricated fair-faced brick and ground beam, the ground beam top is uniformly distributed with several first grouting holes being arranged along vertical direction, the top of the prefabricated fair-faced brick is provided with two U-shaped grooves with opening outward mirror image on both sides, the U-shaped groove is formed by first convex edge structure integrally connected to the top of prefabricated fair-faced brick; The bottom edge of the prefabricated fair-faced brick is provided with a rectangular groove, the rectangular groove is formed by second convex edge structure integrally connected to the bottom of prefabricated fair-faced brick, the rectangular groove is used to lock the adjacent U-shaped groove of two adjacent prefabricated fair-faced bricks below, the end pouring groove is provided at the end of the prefabricated fair-faced brick where the outer side end of the U-shaped groove is located, and the second grouting hole is provided through the groove bottom of each U-shaped groove. The prefabricated fair-faced concrete block includes a block body, the outer side end of the block body extends downward to form a cover plate matched with the end pouring groove, the bottom end of the block body is provided with a U-shaped groove matched with the convex edge structure of the U-shaped groove, and the ground beam, the prefabricated fair-faced brick and the prefabricated fair-faced concrete block are spliced with each other and poured with fair-faced concrete slurry into the first grouting hole, the second grouting hole and the end pouring groove to form an outer wall structure.

2. A fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 1, characterized in that: The distance between the outer wall surface of the U-shaped groove and the side surface of the brick body is consistent with the thickness of the groove wall of the rectangular groove, the distance between the opposite groove walls of the two U-shaped grooves of the same prefabricated fair-faced brick is twice the thickness of the groove wall of the rectangular groove, and the outer surface of the side wall of the rectangular groove is coplanar with the side surface of the brick body.

3. A fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 2, characterized in that: The length of the brick body is twice the width, when the end pouring grooves of two prefabricated fair-faced bricks are butted, the prefabricated fair-faced brick on the top is placed on the top ends of the two prefabricated fair-faced bricks, the rectangular groove at the bottom of the prefabricated fair-faced brick on the top simultaneously locks the U-shaped groove at the top right side of the prefabricated fair-faced brick on the top left side below and the U-shaped groove at the top left side of the prefabricated fair-faced brick on the top right side below, and when the rectangular groove is locked, the groove walls of the end pouring grooves at the opposite ends of the prefabricated fair-faced brick on the top left side and the prefabricated fair-faced brick on the top right side below are in close contact and form a complete pouring groove.

4. A fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 3, characterized in that: The spacing of the first grouting hole is matched with the size of the prefabricated fair-faced brick and the spacing of the two second grouting holes of the same prefabricated fair-faced brick, when several prefabricated fair-faced bricks are arranged side by side on the top end of the ground beam and each second grouting hole is aligned with the first grouting hole above and below, the end portions of the adjacent prefabricated fair-faced bricks are in abutment.

5. A fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 4, characterized in that: The width of the prefabricated fair-faced concrete block is consistent with the inner width of the rectangular groove, the inner surface of the cover plate is provided with a plurality of arc-shaped grooves in the longitudinal direction, the bottom end of the cover plate is in abutment with the groove bottom of the end pouring groove, the outer surface of the cover plate is flush with the end surface of the brick body, and the thickness of the rear wall of the U-shaped groove is consistent with the thickness of the groove wall of the rectangular groove.

6. A fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 5, characterized in that: The outer edge of the U-shaped groove is flush with the side wall surface of the block body, and the third grouting hole is further provided on the block body, when the prefabricated fair-faced concrete block is clamped with the U-shaped groove on one side of the top end of the prefabricated fair-faced brick below through the U-shaped groove, the third grouting hole is aligned with the second grouting hole of the prefabricated fair-faced brick below.

7. The construction method of a fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 6, characterized in that, The utility model includes the following steps: Step 1, ground beam is struck; Step 2, prefabricated fair-faced bricks are initially spliced on the top end of the ground beam, and prefabricated fair-faced concrete blocks are spliced at the positions of the end portions of the outer wall structure in the splicing process; Step 3, fair-faced concrete is poured, and the outer wall structure is formed.

8. The construction method of a fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 7, characterized in that: In step 2, the prefabricated fair-faced concrete blocks are spliced in an interlaced manner, and in the splicing process, the rectangular groove of the upper prefabricated fair-faced concrete block is locked with the adjacent U-shaped grooves of the prefabricated fair-faced concrete blocks on the left and right sides below, and the adjacent end pouring grooves are abutted and form a complete pouring groove; in the masonry process, the second grouting holes of the upper and lower layers are opposite to each other; The fair-faced concrete blocks are spliced at the end of the outer wall structure, the top end of the block is clamped with the rectangular groove at the bottom of the prefabricated fair-faced concrete block above, the U-shaped groove at the bottom end of the block is clamped with the convex rib structure of the U-shaped groove at the top end of the adjacent prefabricated fair-faced concrete block below, and the arc-shaped groove and the corresponding end pouring groove form an end pouring space.

9. The construction method of a fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 8, characterized in that: In step 2, in order to make the spliced structure have preliminary strength, when splicing the prefabricated fair-faced concrete blocks of the upper and lower layers, a certain amount of fair-faced concrete slurry is put into the U-shaped groove at the top end of the prefabricated fair-faced concrete block below.

10. The construction method of a fair-faced concrete precast block and fair-faced brick composite exterior wall structure according to claim 9, characterized in that: In step 3, the steel bars are inserted into the second grouting holes, the first grouting holes, and the third grouting holes, the second grouting holes, and the first grouting holes, respectively, the slurry pipe is used to inject the fair-faced concrete slurry from the upper end of the second grouting hole or the third grouting hole at the top of the outer wall structure, the slurry enters the U-shaped groove and the rectangular groove, the complete pouring groove and the end pouring space through the second grouting holes, the first grouting holes, or the third grouting holes, the second grouting holes, and the first grouting holes, and finally the outer wall structure is formed after the slurry reaches a certain strength.

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