Fabricated immature soil wall composite base joint, wall and construction method

Abstract

The embodiment of the invention relates to an assembly type immature soil wall body composite base joint, a wall body and a construction method. The assembly type immature soil wall body composite base joint comprises a base body, a groove, an air blocking groove and a through hole. The base body comprises a connecting part and a tilting fillet part; the connecting part is used for connecting the ground ring beam and the immature soil interlocking building block; the apron flashing part is located on one side of the lower portion of the connecting part and integrally connected with the connecting part, and the included angle between the upper surface of the apron flashing part and the side face of the connecting part is an obtuse angle and used for guiding the flow direction of rainwater; the groove is positioned on the top surface of the base body and is used for being connected with a convex rib of the immature soil interlocking building block in a matching manner; the air blocking groove is formed in the bottom surface of the base body, is parallel to the projection of the groove and is used for cutting off a siphon path of capillary water; the through hole is located in the base body, the axial projection of the through hole is perpendicular to the projection of the air blocking groove, and the through hole is used for containing a vertical steel bar core column.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a prefabricated rammed earth wall composite base node, wall, and construction method. Background Technology

[0002] Earthen buildings have gained attention due to their eco-friendliness and good heat retention. However, earthen materials have poor water resistance. In actual engineering projects, the base of the wall is a weak point. Moisture in the soil can seep upwards along the foundation through capillary action, causing dampness and reduced strength at the wall base. Rainwater running from the eaves or splashing water from the ground can easily erode the base of the wall.

[0003] Furthermore, modern earthen buildings often use "fiber-reinforced earthen interlocking blocks," which achieve automatic centering and shear-resistant connection through the "rib-groove interlocking" between the blocks. However, this special geometric shape with "convex ribs facing down" makes it impossible to directly and stably lay the first layer of blocks on a flat concrete ground beam or foundation surface, making leveling very difficult. Summary of the Invention

[0004] The purpose of this invention is to address the deficiencies of existing technologies by providing a prefabricated rammed earth wall composite foundation node, wall, and construction method.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a prefabricated rammed earth wall composite base node, the prefabricated rammed earth wall composite base node comprising: a base body, a groove, an air-blocking groove, and a through hole; The base body includes a connecting part and a drip edge; the connecting part is used to connect the ground beam and the interlocking earthen blocks; the drip edge is located on the lower side of the connecting part and is integrally connected with the connecting part, and the angle between the upper surface of the drip edge and the side of the connecting part is an obtuse angle, which is used to guide the flow of rainwater. The groove is located on the top surface of the base body and is used to connect with the protruding ribs of the interlocking earthen block. The air blocking groove is located on the bottom surface of the base body, and the projection of the air blocking groove is parallel to that of the groove, which is used to cut off the siphon path of capillary water. The through hole is located within the base body, and the axial projection of the through hole is perpendicular to the projection of the air blocking groove, used to accommodate the vertical steel core column.

[0006] Preferably, the base body is made of waterproof and impermeable concrete.

[0007] Preferably, the width of the groove is greater than the width of the rib, and the depth of the groove is greater than the height of the rib.

[0008] Preferably, the cross-section of the air blocking groove is an inverted V-shape or a trapezoid.

[0009] Preferably, the air blocking grooves are symmetrically arranged on both sides of the bottom of the through hole.

[0010] Preferably, the bottom surface of the connecting part is further provided with reinforcing ribs; The direction of the reinforcing rib is perpendicular to the direction of the air blocking groove.

[0011] Preferably, the bottom surface of the drip edge is provided with a drip groove; The direction of the drip groove is parallel to the direction of the air blocking groove.

[0012] More preferably, the drip groove is semi-circular or rectangular in shape.

[0013] Secondly, embodiments of the present invention provide a prefabricated rammed earth wall, the prefabricated rammed earth wall comprising a ground beam, at least one layer of prefabricated rammed earth wall composite base node as described in any of the first aspects above, and at least one layer of rammed earth interlocking blocks; the prefabricated rammed earth wall composite base node is located above the ground beam; the rammed earth interlocking blocks are engaged with the prefabricated rammed earth wall composite base node.

[0014] Thirdly, embodiments of the present invention provide a construction method for prefabricated rammed earth walls as described in the second aspect, the construction method comprising: Installation involves laying a mortar leveling layer on the ground beam and fitting the prefabricated earthen wall composite base node as described in any of the first aspects onto the pre-embedded steel bars, ensuring that the mortar in the air-blocking groove is discontinuous or filled with compressible material. Grouting is performed by injecting grout into the through holes of the prefabricated rammed earth wall composite base nodes. In the masonry process, a mortar layer is laid into the groove of the prefabricated rammed earth wall composite base node, and the convex ribs of the rammed earth interlocking blocks are aligned with the grooves and bonded together through the mortar layer.

[0015] This invention provides a prefabricated rammed earth wall composite foundation node. The connection section features vertical load-bearing, and the groove design facilitates interlocking with the rammed earth blocks, improving shear resistance. The outward-extending drip edge forms a cantilever, and the sloping surface guides the direction of rainwater dripping, preventing splashing. Combined with the drip groove, rainwater is forced to drip, preventing backflow and contamination of the wall base. Furthermore, the air-blocking groove cuts off the siphon path of capillary water (groundwater), preventing underground moisture from invading and further enhancing moisture protection. The through-hole design solves the construction problem of inaccurate pre-embedded steel reinforcement placement, achieving integrated seismic resistance. In summary, this prefabricated rammed earth wall composite foundation node acts as a bridge between the ground beam and the rammed earth interlocking blocks, overcoming the shortcomings of traditional wall bases, such as easy dampness and weak connections, and preventing the problem of rotten wall bases. This prefabricated rammed earth wall composite foundation node integrates structural load-bearing, waterproofing, moisture protection, and interface transition functions, facilitating installation. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a prefabricated rammed earth wall composite base node provided in an embodiment of the present invention; Figure 2 A bottom view of a prefabricated rammed earth wall composite base node provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly of the prefabricated rammed earth wall composite base node and the rammed earth interlocking block provided in an embodiment of the present invention. Figure 4 A flowchart illustrating a construction method for a prefabricated rammed earth wall, as provided in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 The following is a structural diagram of the prefabricated rammed earth wall composite base node provided in an embodiment of the present invention. Figure 1 The technical solution of the present invention will be described with reference to specific embodiments.

[0020] The present invention provides a prefabricated rammed earth wall composite base node, which may specifically include: base body 1, groove 2, air blocking groove 3 and through hole 4.

[0021] The base body 1 is a crucial transition mechanism between the ground beam and the interlocking earthen blocks, including a connecting portion 11 and a drip edge 12. The connecting portion 11 connects the ground beam and the interlocking earthen blocks. As a preferred embodiment, such as... Figure 2 As shown, to enhance the flexural strength of the prefabricated rammed earth wall composite base node during transportation, reinforcing ribs 111 are also provided on the bottom surface of the connection part 11, with the reinforcing ribs 111 spaced at a preset distance. In a specific ion, the preset distance can be 120mm.

[0022] The drip edge 12 is the water guiding mechanism of the base body 1, located on the lower side of the connecting part 11 and integrally connected to the connecting part 11. The angle between the upper surface of the drip edge 12 and the side of the connecting part 11 is an obtuse angle, which is beneficial for guiding the flow of rainwater. In a preferred embodiment, a drip groove 121 is provided on the bottom surface of the drip edge 12. The direction of the drip groove 121 is parallel to the direction of the air blocking groove 3, which can force rainwater to drip and prevent backflow and contamination of the wall base. The shape of the drip groove 121 can be semi-circular or rectangular. Specifically, the dimensions of the drip groove 121 are 10mm wide and 5mm deep.

[0023] The base body 1 is made of waterproof and seepage-resistant concrete, preferably modified concrete with a strength of C30 or higher.

[0024] In a specific example, the base body 1 has a length of 240mm, a height of 180mm, and a total width of 150mm. Among them, the width of the top load-bearing area (the top of the connecting part) is 120mm, and the bottom outer overhang (the bottom width of the drip edge) is 30mm.

[0025] In a preferred embodiment, the outer surface of the base body 1 can be imprinted with a biomimetic soil texture during prefabrication, so that the prefabricated rammed earth wall composite base node is seamlessly integrated with the upper rammed earth wall, eliminating the need for modification costs of the rammed earth interlocking blocks.

[0026] The groove 2 is located on the top surface of the base body 1 and is set along the axial direction of the base body 1, that is, perpendicular to the projection direction of the reinforcing rib 111, so as to facilitate the connection with the protruding rib of the interlocking earth block. The width of the groove 2 is greater than the width of the protruding rib, and the depth of the groove 2 is greater than the height of the protruding rib. This allowance facilitates the filling of the grout, adjusts construction errors, and avoids stress concentration caused by direct contact between the protruding rib and the groove 2.

[0027] As an example, and not a limitation, the width of groove 2 is 100mm and the depth is 15mm.

[0028] Air-blocking groove 3 is located on the bottom surface of the base body 1. The projection of air-blocking groove 3 is parallel to that of groove 2, i.e., it is set along the axial direction of the base body 1. The air gaps within the air-blocking groove 3 physically cut off the siphon path of capillary water (groundwater), preventing underground moisture from intruding upwards. The cross-section of the air-blocking groove 3 is an inverted V-shape or trapezoidal. Preferably, there are two air-blocking grooves 3. Reinforcing ribs 111 divide the air-blocking groove 3 into independent air chambers, blocking airflow and enhancing the wall's insulation effect to some extent. The width of the air-blocking groove 3 is 10mm, and its depth is 5mm.

[0029] The through hole 4 is located inside the base body 1. The axial projection of the through hole 4 is perpendicular to the projection of the air blocking groove 3, and it is used to accommodate the vertical steel core column. Two air blocking grooves 3 are symmetrically arranged on both sides of the bottom of the through hole 4.

[0030] In one alternative design, there can be two through holes 4, located in the load-bearing center area of ​​the base body 1. As an example, and not a limitation, the diameter of the through holes 4 can be 40 mm.

[0031] This invention provides a prefabricated rammed earth wall composite foundation node. The connection section features vertical load-bearing, and the groove design facilitates interlocking with the rammed earth blocks, improving shear resistance. The outward-extending drip edge forms a cantilever, and the sloping surface guides the direction of rainwater dripping, preventing splashing. Combined with the drip groove, rainwater is forced to drip, preventing backflow and contamination of the wall base. Furthermore, the air-blocking groove cuts off the siphon path of capillary water (groundwater), preventing underground moisture from rising and further enhancing moisture protection. The through-hole design provides sufficient positioning tolerance for the embedded reinforcing steel, ensuring the continuity of vertical core column grouting and forming an integrated load-bearing system with the foundation body, the upper wall, and the ground beam. In summary, this prefabricated rammed earth wall composite foundation node acts as a bridge between the ground beam and the rammed earth blocks, overcoming the shortcomings of traditional wall bases, such as easy dampness and weak connections, and preventing the problem of rotten wall bases. This prefabricated rammed earth wall composite base node integrates structural load-bearing, waterproofing and moisture-proofing, and interface transition functions, making it easy to install.

[0032] Combination Figure 3 As shown in the figure, this embodiment of the invention also provides a prefabricated rammed earth wall, which includes a ground beam (not shown in the figure), at least one layer of prefabricated rammed earth wall composite base node 1 as described above, and at least one layer of rammed earth interlocking blocks 100. The prefabricated rammed earth wall composite base node 1 is located above the ground beam. The rammed earth interlocking blocks 100 and the prefabricated rammed earth wall composite base node 1 are engaged by grooves 2 and protruding ribs 101, and vertical reinforcing bars 200 pass through the rammed earth interlocking blocks 100 and the prefabricated rammed earth wall composite base node 1.

[0033] The length of the interlocking earthen block is 240mm, the width is 120mm, the height is 90mm, the diameter of the grouting hole is 20mm, and the width of the rib is 20mm and the height is 10mm.

[0034] This invention provides a construction method for prefabricated rammed earth walls, specifically including the following: Figure 4 The steps in: Step 110, Installation: Lay a mortar leveling layer on the ground beam and fit the prefabricated rammed earth wall composite base node onto the pre-embedded steel bar to ensure that the mortar of the air blocking groove is discontinuous or filled with compressible material. Specifically, when laying the leveling layer, you can first place hydrophobic foam strips and reserve space for air-blocking grooves.

[0035] Step 120, grouting: Grout into the through holes of the prefabricated rammed earth wall composite base nodes; Specifically, the grout is self-compacting concrete. After solidification, the base body and the ground beam are connected as a whole by vertical steel bars, forming a rigid seismic-resistant root node. The vertical joints between the base bodies are filled with waterproof mortar to ensure the continuity of the waterproof layer on the outside of the base body.

[0036] Step 130, masonry: lay a mortar layer into the groove of the prefabricated rammed earth wall composite base node, align the convex ribs of the rammed earth interlocking blocks with the groove, and bond them together through the mortar layer.

[0037] This invention provides a construction method for prefabricated rammed earth walls. Utilizing the bridging effect of the prefabricated rammed earth wall composite base node, it avoids the cumbersome leveling of the first layer of interlocking rammed earth blocks in the ground beam. The groove of the connecting part of the prefabricated rammed earth wall composite base node precisely engages with the protruding ribs of the upper interlocking rammed earth blocks, and the tolerance space is filled by the grout layer, achieving good horizontal shear connection and uniform stress transfer. The design of the through hole provides sufficient positioning tolerance for the pre-embedded steel bars, ensuring the continuity of vertical core column grouting, and making the prefabricated rammed earth wall composite base node, the upper wall, and the ground beam form an integral load-bearing system. The air-blocking groove at the bottom physically cuts off the capillary rise path, effectively preventing moisture from the foundation from intruding. The slope of the drip edge and the drip groove guide splashed rainwater to a position away from the wall base, preventing rainwater backflow erosion. The combination of these two methods fundamentally solves the problem of "rotten wall base." This prefabricated rammed earth wall composite foundation node is a factory-prefabricated component, with precise dimensions, stable strength, and reliable water drainage performance. It allows for rapid on-site installation, improving efficiency and construction quality. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A prefabricated rammed earth wall composite foundation node, characterized in that, The prefabricated rammed earth wall composite base node includes: base body, groove, air blocking groove and through hole; The base body includes a connecting part and a drip edge; the connecting part is used to connect the ground beam and the interlocking earthen blocks; the drip edge is located on the lower side of the connecting part and is integrally connected with the connecting part, and the angle between the upper surface of the drip edge and the side of the connecting part is an obtuse angle, which is used to guide the flow of rainwater. The groove is located on the top surface of the base body and is used to connect with the protruding ribs of the interlocking earthen block. The air blocking groove is located on the bottom surface of the base body, and the projection of the air blocking groove is parallel to that of the groove, which is used to cut off the siphon path of capillary water. The through hole is located within the base body, and the axial projection of the through hole is perpendicular to the projection of the air blocking groove, used to accommodate the vertical steel core column.

2. The prefabricated rammed earth wall composite base node according to claim 1, characterized in that, The base body is made of waterproof and seepage-resistant concrete.

3. The prefabricated rammed earth wall composite base node according to claim 1, characterized in that, The width of the groove is greater than the width of the rib, and the depth of the groove is greater than the height of the rib.

4. The prefabricated rammed earth wall composite base node according to claim 1, characterized in that, The cross-section of the air blocking groove is inverted V-shaped or trapezoidal.

5. The prefabricated rammed earth wall composite base node according to claim 1, characterized in that, The air blocking grooves are symmetrically arranged on both sides of the bottom of the through hole.

6. The prefabricated rammed earth wall composite base node according to claim 1, characterized in that, The bottom surface of the connecting part is also provided with reinforcing ribs; The direction of the reinforcing rib is perpendicular to the direction of the air blocking groove.

7. The prefabricated rammed earth wall composite base node according to claim 1, characterized in that, The bottom surface of the water-receiving part is provided with a drip groove; The direction of the drip groove is parallel to the direction of the air blocking groove.

8. The prefabricated rammed earth wall composite base node according to claim 7, characterized in that, The drip groove is semi-circular or rectangular in shape.

9. A prefabricated rammed earth wall system, characterized in that, The prefabricated rammed earth wall includes a ground beam, at least one layer of prefabricated rammed earth wall composite base node as described in any one of claims 1-8, and at least one layer of rammed earth interlocking blocks; the prefabricated rammed earth wall composite base node is located above the ground beam; the rammed earth interlocking blocks are engaged with the prefabricated rammed earth wall composite base node.

10. A construction method for prefabricated rammed earth walls as described in claim 9, characterized in that, The construction method includes: Installation involves laying a mortar leveling layer on the ground beam and fitting the prefabricated earthen wall composite base node as described in any of claims 1-8 onto the pre-embedded steel bars, ensuring that the mortar in the air-blocking groove is discontinuous or filled with compressible material. Grouting is performed by injecting grout into the through holes of the prefabricated rammed earth wall composite base nodes. In the masonry process, a mortar layer is laid into the groove of the prefabricated rammed earth wall composite base node, and the convex ribs of the rammed earth interlocking blocks are aligned with the first groove and bonded through the mortar layer.

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