Reinforced block stone wall and construction method thereof

Abstract

The invention discloses a reinforced block stone wall body and a construction method thereof, and relates to the technical field of block stone wall body reinforcement, the reinforced block stone wall body comprises a block stone wall body, a first filler and a second filler, at least one side face of the block stone wall body is a reinforcing face, mortar joints on the reinforcing face comprise skeleton mortar joints and general mortar joints, and the skeleton mortar joints and the general mortar joints are arranged on the reinforcing face. The skeleton mortar joints are filled with the first filler, the first filler is a negative Poisson's ratio material layer and a cement-based composite material layer which are sequentially filled in the skeleton mortar joints from inside to outside, the general mortar joints are filled with the second filler, and the second filler comprises a cement mortar layer or a fine aggregate concrete layer. The reinforced block stone wall body provided by the invention is excellent in anti-seismic property and lower in manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of block stone wall reinforcement, in particular to a reinforced block stone wall and a construction method thereof. Background Art

[0002] Most block stone masonry walls are built with blocks of relatively irregular sizes, which results in mortar joints between adjacent blocks. These mortar joints need to be filled with fillers to enhance the stability of the wall. At present, in order to improve the risk resistance of block stone walls, the requirements for the seismic performance of block stone walls are gradually increasing. It is difficult to meet the seismic requirements by only using conventional materials (similar to cement mortar) to fill the mortar joints; although more high-ductility materials (similar to fiber concrete) are beginning to be used in the grouting and reinforcement of block stone walls, there are many mortar joints on the block stone walls, and the mortar joints may be wide and deep. If all materials similar to fiber concrete are used for grouting, the amount of materials required is large and the cost is high. Therefore, there is an urgent need for a reinforced block stone wall with excellent seismic performance and lower cost and a construction method thereof. Summary of the invention

[0003] The purpose of the present invention is to provide a reinforced block stone wall and a construction method thereof to solve the problems existing in the above-mentioned prior art, with excellent earthquake resistance and lower cost.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a reinforced block stone wall, comprising: a block stone wall body, a first filler and a second filler, at least one side surface of the block stone wall body is a reinforcement surface, the mortar joints on the reinforcement surface include skeleton mortar joints and general mortar joints, the skeleton mortar joints are filled with the first filler, the first filler is a negative Poisson's ratio material layer and a cement-based composite material layer filled in sequence from the inside to the outside of the skeleton mortar joints, the general mortar joints are filled with the second filler, and the second filler includes a cement mortar layer or a fine stone concrete layer.

[0006] In some embodiments, the skeleton mortar joints include a plurality of transverse mortar joints and a plurality of vertical mortar joints, and each of the transverse mortar joints and each of the vertical mortar joints are cross-arranged.

[0007] In some embodiments, the distance between two adjacent transverse mortar joints is 600mm-800mm, and the distance between two adjacent vertical mortar joints is 600mm-800mm.

[0008] In some embodiments, the thickness of the cement-based composite material layer in the skeleton mortar joint in the depth direction of the skeleton mortar joint is 20 mm-30 mm, and the thickness of the negative Poisson's ratio material layer in the depth direction of the skeleton mortar joint is 30 mm-50 mm.

[0009] In some embodiments, the fine stone concrete layer is a C20 fine stone concrete layer, the general mortar joints with a width greater than 40 mm are filled with the C20 fine stone concrete layer, and the general mortar joints with a width not greater than 40 mm are filled with the cement mortar layer.

[0010] In some embodiments, the negative Poisson's ratio material layer is a metal negative Poisson's ratio material layer.

[0011] In some embodiments, the cement-based composite material layer is a high performance fiber reinforced cement-based composite material layer (HP-FRCC).

[0012] In some embodiments, the block stone wall body has multiple reinforcement faces.

[0013] The present invention also provides a construction method for reinforcing a block stone wall, comprising the following steps:

[0014] Divide the mortar joints: Divide the positions of the skeleton mortar joints and general mortar joints on the reinforcement surface of the block stone wall body;

[0015] Mortar joint filling: fill the negative Poisson's ratio material layer and cement-based composite material layer in the skeleton mortar joint from the inside to the outside, and fill the cement mortar layer or fine stone concrete layer in the general mortar joint.

[0016] In some embodiments, the mortar joint filling step can also be: filling the negative Poisson's ratio material layer and the cement-based composite material layer in the skeleton mortar joint from the inside to the outside, filling the cement mortar layer in the general mortar joint with a width not greater than 40 mm, and filling the C20 fine stone concrete layer in the half mortar joint with a width greater than 40 mm.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The reinforced block stone wall provided by the present invention is reinforced by sequentially filling a negative Poisson's ratio material layer and a cement-based composite material layer in the skeleton mortar joints of the wall from the inside to the outside. In the skeleton mortar joints, the negative Poisson's ratio material layer shrinks under pressure in the horizontal direction and expands in the vertical direction. This deformation mode can consume more earthquake energy. The cement-based composite material layer has higher ductility and strength. The negative Poisson's ratio material layer and the cement-based composite material layer jointly support the wall and bear force in coordination, thereby improving the strength and elastic deformation capacity of the block stone wall body and making the block stone wall body more seismic-resistant. Moreover, the first filler is only used in the skeleton mortar joints, while the cheaper cement mortar or fine stone concrete is used in the general mortar joints. Compared with using a material with higher ductility in all mortar joints, the cost of the reinforced block stone wall is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a partial enlarged view of the mortar joint of the skeleton in some embodiments of the present invention;

[0021] Figure 2 A cross-sectional view of a reinforced stone wall body on one side serving as a reinforcement surface in some embodiments of the present invention;

[0022] Figure 3 It is a cross-sectional view of the case where both sides of the reinforced block stone wall are reinforced surfaces in some embodiments of the present invention;

[0023] Figure 4 A side view of a block stone wall body in some embodiments of the present invention;

[0024] In the figure: 1. Block stone wall body; 2. Skeleton mortar joint; 3. General mortar joint; 4. First filling material; 5. Second filling material; 6. Negative Poisson's ratio material layer; 7. Cement-based composite material layer; 8. Horizontal mortar joint; 9. Vertical mortar joint; 10. Reinforcement surface. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a reinforced block stone wall and a construction method thereof to solve the problems existing in the above-mentioned prior art, with excellent earthquake resistance and lower cost.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1

[0029] This embodiment provides a reinforced stone wall, such as Figure 1-4As shown, it includes: a block stone wall body 1, a first filler 4 and a second filler 5, at least one side of the block stone wall body 1 is a reinforcement surface 10, the mortar joints on the reinforcement surface 10 include a skeleton mortar joint 2 and a general mortar joint 3, the skeleton mortar joint 2 is filled with the first filler 4, the first filler 4 is a negative Poisson's ratio material layer 6 and a cement-based composite material layer 7 filled in sequence from the inside to the outside of the skeleton mortar joint 2, the general mortar joint 3 is filled with the second filler 5, the second filler 5 includes a cement mortar layer or a fine stone concrete layer.

[0030] The reinforced block stone wall provided in this embodiment reinforces the block stone wall body 1 by sequentially filling a negative Poisson's ratio material layer 6 and a cement-based composite material layer 7 in the frame mortar joint 2 of the wall from the inside to the outside. When the wall is subjected to the horizontal shear force generated by the earthquake, the block stone wall body 1 undergoes horizontal deformation, and the negative Poisson's ratio material layer 6 and the cement-based composite material layer 7 filled in the mortar joints can withstand most of the horizontal shear force, and the remaining small part of the horizontal shear force is absorbed by the fillers in the general mortar joints 3, thereby redistributing the horizontal shear force and making the skeleton mortar joints 2 withstand more horizontal shear force; in the skeleton mortar joints 2, the negative Poisson's ratio material layer 6 shrinks under the pressure in the horizontal direction and expands in the vertical direction, transferring the horizontal earthquake energy to the vertical direction and consuming more earthquake energy, and the cement-based composite material layer 7 has higher ductility and strength, and the negative Poisson's ratio material layer 6 and the cement-based composite material layer 7 jointly support the wall and bear the force synergistically, thereby improving the strength and elastic deformation capacity of the block stone wall body 1, and making the block stone wall body 1 more seismic resistant; moreover, only the first filler 4 is used in the skeleton mortar joints 2, and the cheaper cement mortar or fine stone concrete is used in the general mortar joints 3, compared with using materials with higher ductility in all mortar joints, the cost of reinforcing the block stone wall is reduced.

[0031] In the first embodiment of the present invention, the skeleton joint 2 includes a plurality of transverse joints 8 and a plurality of vertical joints 9, and each transverse joint 8 and each vertical joint 9 are cross-arranged. When the block stone wall body 1 is subjected to stress, most of the horizontal shear force is borne by the transverse joints 8, and the remaining small part of the horizontal shear force is borne by the general joints 3. The vertical joints 9 connect the transverse joints 8 together, thereby enhancing the integrity of the block stone wall body 1.

[0032] In one implementation of the present embodiment, the skeleton mortar joints 2 include a plurality of transverse mortar joints 8 and a plurality of vertical mortar joints 9, the distance between two adjacent transverse mortar joints 8 is 600mm-800mm, and the distance between two adjacent vertical mortar joints 9 is 600mm-800mm.

[0033] Specifically, when dividing the skeleton mortar joints 2, a horizontal mortar joint 11 can be set every 700 mm along the horizontal direction from the edge of the block stone wall body, and a vertical mortar joint 12 can be set every 700 mm along the vertical direction from the top of the block stone wall body. The horizontal mortar joints 11 and the vertical mortar joints 12 can be set along the mortar joints on the reinforcement surface that are closest to the straight line.

[0034] In one implementation of this embodiment, the thickness of the cement-based composite material layer 7 in the skeleton mortar joint 2 in the depth direction of the skeleton mortar joint 2 is 20mm-30mm, and the thickness of the negative Poisson's ratio material layer 6 in the depth direction of the skeleton mortar joint 2 is 30mm-50mm.

[0035] In one implementation of this embodiment, the fine stone concrete layer is a C20 fine stone concrete layer, and the general mortar joints 3 with a width greater than 40 mm are filled with a C20 fine stone concrete layer, and the general mortar joints 3 with a width not greater than 40 mm are filled with a cement mortar layer. C20 fine stone concrete has higher strength than cement mortar, and when the mortar joints are wider, the use of C20 fine stone concrete is not prone to cracking.

[0036] In one implementation of the present embodiment, the negative Poisson's ratio material layer 6 is a metal negative Poisson's ratio material layer. The metal negative Poisson's ratio material layer has holes arranged in an array (similar to a honeycomb), and has a lower density, higher high strength, higher stiffness and stronger negative Poisson's ratio characteristics, and can withstand horizontal shear force well. Among them, when filling the negative Poisson's ratio material layer 6, the holes of the negative Poisson's ratio material layer 6 should be facing the inner wall of the mortar joint, and the side of the negative Poisson's ratio material layer 6 without holes should be facing the opening of the mortar joint, and then the cement-based composite material layer 7 is filled, which can prevent the cement-based composite material layer 7 from entering the holes of the metal negative Poisson's ratio material layer and blocking the holes.

[0037] It should be noted that in addition to metal negative Poisson's ratio materials, other materials with negative Poisson's ratio properties such as zirconia ceramic negative Poisson's ratio materials, foam negative Poisson's ratio materials, liquid metal negative Poisson's ratio materials and biological negative Poisson's ratio materials can also be used for filling.

[0038] In one embodiment of the present invention, the cement-based composite material layer 7 is a high-performance fiber-reinforced cement-based composite material layer (HP-FRCC). HP-FRCC has good bonding properties with both the block stone wall and the metal negative Poisson's ratio material layer, and can further improve the strength and integrity of the block stone wall.

[0039] In order to further improve the strength of the block stone wall body 1, in one implementation of this embodiment, the block stone wall body 1 has a plurality of reinforcement surfaces 10. Figure 3 As shown, during actual construction, the two largest wall surfaces can be selected as the reinforcement surface 10. If necessary, the side surface or top surface with a smaller area on the block stone wall body 1 can also be used as the reinforcement surface 10.

[0040] Embodiment 2

[0041] This embodiment provides a construction method for reinforcing a block stone wall, comprising the following steps:

[0042] Dividing the mortar joints: Dividing the positions of the skeleton mortar joints 2 and the general mortar joints 3 on the reinforcement surface 10 of the block stone wall body 1;

[0043] Mortar joint filling: fill the negative Poisson's ratio material layer 6 and the cement-based composite material layer 7 in the skeleton mortar joint 2 from the inside to the outside, and fill the general mortar joint 3 with a cement mortar layer or a fine stone concrete layer.

[0044] The block stone wall construction method in this embodiment uses the negative Poisson's ratio material layer 6 and the cement-based composite material layer 7 to jointly support the wall and bear the force in coordination, thereby improving the strength and elastic deformation capacity of the block stone wall body 1 and making the block stone wall more earthquake-resistant. Moreover, the first filler 4 is used only in the skeleton mortar joint 2, while the cheaper cement mortar and fine stone concrete are used in the general mortar joint 3, which reduces the cost of reinforcing the block stone wall compared to using a material with higher ductility in all mortar joints.

[0045] In order to prevent cracking caused by excessively wide mortar joints, in one implementation of this embodiment, the mortar joint filling step can also be replaced by: filling the first filler 4 in the skeleton mortar joint 2, filling cement mortar in the general mortar joint 3 with a width not exceeding 40 mm, and filling C20 fine stone concrete in the half mortar joint with a width greater than 40 mm.

[0046] Embodiment 3

[0047] This example tests the bearing capacity of the reinforced block stone wall in some implementation methods of Example 1. The test results are shown in Table 1:

[0048] Table 1 Test results

[0049]

[0050] In the table:

[0051] P cr For: cracking load of reinforced block stone wall;

[0052] Δ cr is: the displacement of the reinforced block stone wall under the cracking load;

[0053] P max are: peak loads of reinforced block stone walls;

[0054] Δ max is: the displacement of the reinforced block stone wall corresponding to the peak load;

[0055] According to the data in the table, compared with the unreinforced block stone wall specimens, the cracking load of the reinforced block stone wall specimens increased by 125.56%, the peak load increased by 140.87%, and the bearing capacity of the reinforced block stone wall was improved. After the displacement angle of the reinforced block stone wall was loaded to 1 / 130, the structure of the reinforced block stone wall reached a collapsed state, at which time the horizontal load of the block stone wall began to decrease, and the horizontal displacement increased by 83.84%, effectively improving the deformation capacity of the block stone wall.

[0056] The test results show that the reinforced block stone wall provided by the present invention can effectively transmit horizontal shear force and significantly improve the shear bearing capacity of the block stone wall. At the same time, since the high-performance fiber reinforced cement-based composite material layer (HP-FRCC) is only used in the skeleton mortar joint part, the project cost is reduced compared with the method of filling fiber concrete in all mortar joints.

[0057] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A reinforced stone wall, characterized in that: include: A block stone wall body, a first filler and a second filler, wherein at least one side of the block stone wall body is a reinforcement surface, the mortar joints on the reinforcement surface include skeleton mortar joints and general mortar joints, the skeleton mortar joints are filled with the first filler, the first filler is a negative Poisson's ratio material layer and a cement-based composite material layer filled in sequence from the inside to the outside of the skeleton mortar joints, the general mortar joints are filled with the second filler, and the second filler includes a cement mortar layer or a fine stone concrete layer.

2. The reinforced block stone wall according to claim 1, characterized in that: The skeleton mortar joints include a plurality of transverse mortar joints and a plurality of vertical mortar joints, and each of the transverse mortar joints and each of the vertical mortar joints are cross-arranged.

3. The reinforced block stone wall according to claim 1, characterized in that: The distance between two adjacent transverse mortar joints is 600mm-800mm, and the distance between two adjacent vertical mortar joints is 600mm-800mm.

4. The reinforced block stone wall according to claim 1, characterized in that: The thickness of the cement-based composite material layer in the skeleton mortar joint in the depth direction of the skeleton mortar joint is 20mm-30mm, and the thickness of the negative Poisson's ratio material layer in the depth direction of the skeleton mortar joint is 30mm-50mm.

5. The reinforced block stone wall according to claim 1, characterized in that: The fine stone concrete layer is a C20 fine stone concrete layer, the general mortar joints with a width greater than 40 mm are filled with the C20 fine stone concrete layer, and the general mortar joints with a width not greater than 40 mm are filled with the cement mortar layer.

6. The reinforced block stone wall according to claim 1, characterized in that: The negative Poisson's ratio material layer is a metal negative Poisson's ratio material layer.

7. The reinforced block stone wall according to claim 1, characterized in that: The cement-based composite material layer is a high-performance fiber-reinforced cement-based composite material layer (HP-FRCC).

8. The reinforced block stone wall according to claim 1, characterized in that: The block stone wall body has a plurality of reinforcement surfaces.

9. A construction method for reinforcing a block stone wall, characterized in that: The following steps are involved: Divide the mortar joints: Divide the positions of the skeleton mortar joints and general mortar joints on the reinforcement surface of the block stone wall body; Mortar joint filling: fill the negative Poisson's ratio material layer and cement-based composite material layer in the skeleton mortar joint from the inside to the outside, and fill the cement mortar layer or fine stone concrete layer in the general mortar joint.

10. The construction method for reinforcing a block stone wall according to claim 9, characterized in that: The mortar joint filling step can also be: filling the negative Poisson's ratio material layer and the cement-based composite material layer in the skeleton mortar joint from the inside to the outside, filling the cement mortar layer in the general mortar joint with a width not greater than 40 mm, and filling the C20 fine stone concrete layer in the half mortar joint with a width greater than 40 mm.

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