CN219491807U - An underground masonry wall through-crack treatment device that is self-tightening when exposed to water - Google Patents

Abstract

The utility model discloses a water-meeting self-pre-tightening underground masonry wall through crack treatment device, which comprises glass fiber ribs, a thin-wall steel pipe and a rubber water stop strip; the thin-wall steel pipe is embedded in the wall body through crack, glass fiber ribs are respectively adsorbed on the surfaces of two sides of the wall body and spirally wound at two ends of the thin-wall steel pipe, and a rubber water stop strip is axially arranged inside the thin-wall steel pipe; the thin-wall steel pipe is provided with a narrow slit and a small hole, and the rubber water stop strip absorbs water and expands through the narrow slit and the small hole, so that the thin-wall steel pipe expands along the opening of the side wall, and the glass fiber reinforcement generates pretightening force. The device is applied to wet underground masonry cultural relics, not only can strengthen mortar joints to improve the overall bearing capacity of a masonry structure, but also can be expanded in water in a self-adaptive manner, and the development of cracks is effectively controlled by freely stretching and stretching the pre-tightening glass fiber reinforced plastic through the thin-wall steel pipes with side joints.

Description

An underground masonry wall through-crack treatment device that is self-tightening when exposed to water

technical field

The utility model relates to the technical field of disease treatment of underground masonry cultural relics, in particular to a treatment device for through-cracks in underground masonry walls that are self-tightening when encountering water.

Background technique

The masonry structure has a long history of development in our country. Most of the ancient buildings in my country are masonry structures, and a large number of them are preserved in underground cultural relics. They are part of my country's unique cultural system. However, due to hundreds of thousands of years of weathering, the performance of materials has deteriorated greatly, especially in ancient masonry structures. and other organic materials. In masonry masonry structures, the strength of masonry itself generally does not change much, and the most deteriorated is the adhesive. The loosening and loss of the binder directly lead to the reduction of the overall bearing capacity of the masonry structure, such as compressive strength, tensile strength, bending strength, and shear strength. All kinds of stress cracks, when the situation is serious, form through cracks. Underground cultural relic buildings have been in a high humidity, constant temperature, and watery environment for a long time, which promotes the slow and continuous development of these cracks, endangering the safety of the cultural relic building itself.

Conventional crack treatment methods for masonry structures, such as pressure grouting, double-sided steel wire mesh aggregate mortar, wall filling and other modern methods, will change or even destroy the status quo of the cultural relics, which violates the "minimum interference" and "identifiable" principles of cultural relics protection , resulting in the annihilation of the value of cultural relics.

Aiming at the defects of the prior art, the utility model proposes a self-tightening underground masonry wall penetration crack treatment device when encountering water. The main components are glass fiber bars and rubber waterstop strips. Winding and bending are convenient for processing and have good bonding performance. The rubber waterstop has the characteristics of self-expansion when encountering water. After expansion, the volume can reach 2-3 times the original volume. Self-tensioning of fiberglass tendons. Due to the characteristics of the above materials, when dealing with through cracks, it is only necessary to remove a small amount of loose horizontal and vertical mortar joints on the walls on both sides of the cracks, embed high-strength glass fiber reinforcement materials, and use lime mortar surface joints to make old joints. The pre-tightening technology adapted to the water environment can control the development of cracks ingeniously and efficiently, and the treatment method in the middle of the cracks is also clearly identifiable, which is suitable for direct display of cultural relics buildings for tourists.

Contents of the invention

The technical problem to be solved by the utility model is to provide a self-tightening underground masonry wall penetration crack treatment device for wet underground masonry cultural relic buildings, which can not only strengthen The gray joints can improve the overall bearing capacity of the masonry structure, and can more adaptively expand when encountering water. The thin-walled steel pipes with open side joints can freely open and stretch the pre-tightened glass fiber reinforcement to effectively control the development of cracks, especially for through-walls. Thick cracks can play a very good effect, solve the limitations of traditional crack treatment technology, while meeting the requirements of controlling crack development, it also has a good reinforcement effect on masonry structures.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

The utility model relates to an underground masonry wall penetrating crack treatment device which is self-tightening when encountering water, comprising glass fiber reinforcement, thin-walled steel pipe, and rubber waterstop strip.

The thin-walled steel pipe is embedded in the through crack of the wall, and the glass fiber bars are respectively adsorbed on the surfaces of both sides of the wall, and spirally wound on both ends of the thin-walled steel tube; the outer wall of the thin-walled steel tube is in close contact with the glass fiber bars, and the inside of the thin-walled steel tube Place the rubber waterstop along the axial direction.

There are narrow slits and small holes on the thin-walled steel pipe. The rubber waterstop strip absorbs water and expands through the narrow slits and small holes. While penetrating the cracks, it also plays a role in limiting the width of cracks in masonry masonry.

Further preferably, two glass fiber reinforcements are arranged at the cracks of each wall, which are respectively installed in the horizontal and vertical mortar joints of the walls on both sides. The glass fiber reinforcements span the wall cracks in the horizontal direction, and the middle part of the glass fiber reinforcements is The spiral ribs are arranged on the thin-walled steel pipe in a winding manner, and are in close contact with both ends of the thin-walled steel pipe.

There are several vertical zigzag anchoring fiber bars distributed at both ends of the glass fiber bar, and the anchoring fiber bars are distributed on both sides of the glass fiber bar along the axial direction.

Further preferably, the serrated anchoring fiber tendons are evenly distributed in the axial direction at both ends of the glass fiber tendons and perpendicular to the glass fiber tendons, and the number of anchoring fiber tendons at each end is greater than or equal to four; between the serrated anchoring fiber tendons The distance between them is the same as the size of the wall masonry, and the length of the anchor fiber reinforcement is the same as the length of the vertical mortar joint.

Further preferably, the elastic modulus of the glass fiber reinforcement 1 is greater than or equal to 7.5×10 ⁴ MPa, the tensile strength is greater than or equal to 550 MPa, and the length of the glass fiber reinforcement in the straight section of the crack on one side of the wall is greater than or equal to 500mm.

Further preferably, the number of spiral ribs wound around the thin-walled steel pipe is two turns, the distance between the two spiral ribs is less than the length of the thin-walled steel pipe, and the inner diameter of the spiral formed by the spiral ribs is larger than the outer diameter of the thin-walled steel pipe.

Further preferably, the length of the thin-walled steel pipe 2 is the same as the thickness of the wall, and the wall thickness of the thin-walled steel pipe 2 is less than 2mm; the two ends of the thin-walled steel pipe 2 are open and the bottom is not sealed; the side wall is provided with a narrow slit 5, and the narrow slit 5 is located at Just above the top of the steel pipe, the slit width is 2 mm; a number of small holes 7 are opened on the left and right sides and the bottom side wall of the steel pipe, the hole diameter is 2 mm, and the spacing is 50 mm; the thin-walled steel pipe 2 is placed vertically in the crack along the wall thickness direction, and is wound by The glass fiber reinforcement 1 on it is fixed in the crack.

Further preferably, the rubber waterstop is cylindrical in shape, the rubber waterstop is a PN putty type water-swellable rubber waterstop, and the water swelling rate is greater than or equal to 200%; the length of the rubber waterstop is the same as the length of the thin-walled steel pipe, The diameter is smaller than the inner diameter of the thin-walled steel pipe.

The utility model has the following beneficial effects:

1. The utility model provides a masonry wall penetrating crack treatment device that is self-tightening when encountering water. By utilizing the characteristics of rubber waterstops that expand when encountering water, a huge contact pressure is generated between the thin-walled steel pipe and the thin-walled steel pipe. The steel pipe expands along the opening of the side wall, thereby driving the glass fiber tendons tightly wound on it to elongate and tighten, automatically generating pre-tightening force, and limiting the continuous development of cracks. Compared with the traditional technology, after the installation of this device is completed, relying on the rubber waterstop strip to absorb a large amount of water in the humid environment where the underground masonry structure cultural relics are located, the automatic pretension of the glass fiber reinforcement can be realized. The spontaneous deformation process requires no external force, and the deformation of the rubber waterstop is irreversible, and the water-absorbing deformation can be sustained, so that the pre-tightening force of the glass fiber can be continuously increased, so that the device can function for a long time; the device does not change The original characteristics of the cracks in the underground ancient buildings have less disturbance to the buildings, can be dismantled, and can be adapted to various forms of cracks.

2. This device installs glass fiber bars at the cracks on both the inside and outside of the wall, and connects and deforms the two glass fiber bars through thin-walled steel pipes, so that the penetrating cracks are protected on both sides of the wall. Control, enhance the connectivity of the internal and external walls through the cracks, achieve synchronous processing, realize the uniform force of the wall, avoid the possible loosening and inclination of the wall due to the force of local reinforcement, and control the cracks, especially the penetration, to the greatest extent Continuous development of cracks.

3. The glass fiber bars of this device are processed and prefabricated by the factory after the size is determined. The serrated anchor fiber bars at the end and the spiral bars in the middle have no joints with the horizontal glass fiber bars, which have good integrity; the glass fiber bars It is fixed by the serrated anchoring fiber bars at both ends, which has the effect of caulking and anchoring, increases the pre-tightening force, and solves the problem of difficult installation and fixing of the device in the traditional crack treatment technology; It affects the integrity of the original wall, and also strengthens the mortar joints, thereby strengthening the overall strength of the masonry structure. Compared with the traditional technology, the device realizes the control of the crack and the reinforcement of the wall structure at the same time by using one device.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the processing device of the present invention.

Fig. 2 is a front structural schematic diagram of the processing device of the present invention.

Fig. 3 is a top structural schematic diagram of the processing device of the present invention.

Fig. 4 is a front view of the treatment device of the present invention when it is implemented in a crack.

Fig. 5 is a top view of the treatment device of the present invention when it is implemented in a crack.

Among them are: 1. Glass fiber reinforcement; 2. Thin-walled steel pipe; 3. Rubber waterstop; 4. Anchor fiber reinforcement; 5. Narrow seam; 6. Spiral reinforcement; 7. Small hole.

Detailed ways

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "left side", "right side", "upper part" and "lower part" are based on the orientation or positional relationship shown in the accompanying drawings, only It is for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and "first", "second" and the like do not mean zero The importance of the components should not be construed as a limitation of the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present utility model.

The device will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, a self-tightening underground masonry wall penetration crack treatment device when encountering water, including glass fiber reinforcement 1, thin-walled steel pipe 2, and rubber waterstop strip 3. The thin-walled steel pipe 2 is embedded in the penetrating crack of the wall, and the glass fiber bars 1 are respectively adsorbed on the surfaces of both sides of the wall, and spirally wound on both ends of the thin-walled steel tube 2; the outer wall of the thin-walled steel tube 2 is in close contact with the glass fiber bars 1 , the rubber waterstop strip 3 is placed axially inside the thin-walled steel pipe 2; the thin-walled steel pipe 2 is provided with a narrow slit 5 and a small hole 7, and the rubber waterstop strip 3 absorbs water through the narrow slit 5 and the small hole 7 in a humid environment. Expansion, the thin-walled steel pipe 2 expands along the opening of the side wall, and the glass fiber reinforcement 1 is tightened to generate a pre-tightening force, thereby limiting the crack width of the masonry while reinforcing the through crack.

Two glass fiber bars 1 are arranged at the cracks of each wall, which are respectively installed in the horizontal and vertical mortar joints of the walls on both sides. The glass fiber bars 1 span the wall cracks in the horizontal direction, and the middle part of the glass fiber bars 1 is a spiral Shaped ribs 6 and spiral ribs 6 are arranged on the thin-walled steel pipe 2 in a winding manner, and are in close contact with both ends of the thin-walled steel pipe 2 . The number of spiral ribs 6 wrapped around the thin-walled steel pipe 2 is two turns, the distance between the two spiral ribs 6 is less than the length of the thin-walled steel pipe 2, and the inner diameter of the spiral formed by the spiral ribs 6 is larger than the outer diameter of the thin-walled steel pipe 2. This setting can make the thin-walled steel pipe 2 become a detachable part, and at the same time ensure that the thin-walled steel pipe 2 and the spiral rib 6 can be in close contact, and the pressure generated by the rubber water stop strip 3 is directly transmitted to the glass fiber rib 1 .

There are several vertical zigzag anchoring fiber reinforcements 4 distributed at both ends of the glass fiber reinforcement 1. The zigzag anchoring fiber reinforcement 4 is evenly distributed in the axial direction at both ends of the glass fiber reinforcement 1 and perpendicular to the glass fiber reinforcement 1. Each end The number of anchoring fiber bars 4 is greater than or equal to four; the spacing between the zigzag anchoring fiber bars 4 is the same as the size of the wall masonry, and the length of the anchoring fiber bars 4 is the same as the length of the vertical mortar joint, so that the anchoring fiber bars 4 It can be well installed in the mortar joint, providing a good reinforcement effect for the mortar joint, and at the same time providing an anchoring effect to fix the glass fiber reinforcement 1.

The elastic modulus of glass fiber reinforcement 1 is greater than or equal to 7.5×10 ⁴ MPa, the tensile strength is greater than or equal to 550MPa, and the length of the glass fiber reinforcement in the straight line section of the crack on one side of the wall is greater than or equal to 500mm, so as to ensure that it can be produced under small deformation Large preload force and high-strength material characteristics can ensure the durability of the device during use.

The length of the thin-walled steel pipe 2 is the same as the thickness of the wall, and the wall thickness of the thin-walled steel pipe 2 is less than 2mm; the two ends of the thin-walled steel pipe 2 are open, and the bottom is not sealed, so that the rubber waterstop 3 can be freely taken and placed; the side wall is provided with a narrow slit 5 , the narrow slit 5 is located directly above the top of the steel pipe, and the slit width is 2 mm, so that the steel pipe is easier to expand and deform from here, and it will not be crushed; there are several small holes 7 on the left and right sides of the steel pipe and the bottom side wall, and the small holes 7 A row is formed along the axial direction of the thin-walled steel pipe 2, each hole diameter is 2 mm, and the spacing is 50 mm, so that the exposed surface of the rubber waterstop 3 can be increased to enhance its water absorption effect; the thin-walled steel pipe 2 is placed vertically along the thickness direction of the wall In the crack, it is fixed in the crack by the glass fiber tendon 1 wrapped around it.

The rubber water-stop strip 3 is cylindrical, and the rubber water-stop strip 3 is a PN putty type water-swellable rubber water-stop strip, and the water-absorbing expansion rate is greater than or equal to 200%; the length of the rubber water-stop strip 3 is the same as that of the thin-walled steel pipe 2, The diameter is smaller than the inner diameter of the thin-walled steel pipe 2, and the free space between the thin-walled steel pipe 2 and the rubber waterstop 3 is controlled so that the rubber waterstop 3 expands and deforms to generate a great contact pressure with the thin-walled steel pipe 2, so that the thin-walled steel pipe 2 The wall steel pipe is deformed along the slit of the side wall, and the glass fiber reinforcement 1 is tightened.

The working principle of this device is:

As shown in Figure 4 and Figure 5, two glass fiber bars 1 are respectively installed on the inner and outer sides of the wall with penetrating cracks, and the thin-walled steel pipes 2 are placed perpendicular to the cracks along the wall thickness direction; After absorbing water spontaneously, the thin-walled steel pipe 2 expands and expands along the opening of the side wall, so that the glass fiber reinforcement 1 is elongated and tensioned, and a pre-tightening force is generated, which plays a role in controlling the development of masonry cracks, and because the glass The fiber reinforcement 1 exists and is fixed between the mortar joints, which plays the role of reinforcing the mortar joints and improves the overall stability and strength of the masonry structure. During use, the zigzag anchoring fiber bars 4 at both ends of the glass fiber bar 1 provide a good anchoring effect, enabling it to be tightly fixed in the mortar joints to generate greater pre-tightening force; the middle spiral The ribs 6 pass through the thin-walled steel pipe 2 in a winding manner, providing a larger contact area. At the same time, the small space between the thin-walled steel pipe 2 and the rubber water-stop strip 3 can make the contact pressure generated by the expansion of the rubber water-stop strip 3 It can be more converted into the pre-tightening force of the glass fiber reinforcement 1; the side wall opening 5 and the small hole 7 of the thin-walled steel pipe 2 improve the water absorption effect of the rubber waterstop 3, so that the rubber waterstop 3 can effectively Adaptively absorb water and expand, thereby driving the glass fiber tendons to elongate and tighten, generating pre-tightening force.

Based on the above-mentioned devices and principles, the specific steps for the treatment of through-cracks in underground masonry walls are as follows:

Step 1. Determine the location of the penetrating crack in the masonry wall, and determine the installation point at a suitable location according to the degree of danger of the crack. The number of installation points is greater than or equal to three;

Step 2. On both sides of the wall at the installation point, carry out seam picking treatment on the mortar joints within the length range of the glass fiber reinforcement 1. The depth of the seam removal is greater than or equal to 10mm, so that the glass fiber reinforcement 1 can be caulked and installed in the mortar joints. , the end serrated fiber anchoring bars 4 of the glass fiber bars are embedded in the vertical mortar joints;

Step 3. Use a high-strength adhesive to caulk the mortar joints embedded in the glass fiber reinforcement 1. The high-strength adhesive is high-strength cement slurry mixed with epoxy resin; then use lime with the same color as the original wall masonry The surface of the mortar joint is treated with old mortar joints, so that the glass fiber reinforcement 1 is firmly fixed inside the mortar joint, and the zigzag anchoring fiber reinforcement 4 at the end provides a good anchoring effect;

Step 4. After the caulking construction and maintenance are completed, insert the thin-walled steel pipe 2 into the through crack of the wall and wrap the glass fiber reinforcement 1, and place the rubber waterstop strip 3 inside the thin-walled steel pipe 2; during the use of the device, The rubber waterstop 3 spontaneously absorbs water from the humid environment through the narrow slit 5 and the small hole 7, thereby expanding and deforming, squeezing the thin-walled steel pipe 2, tensioning the glass fiber reinforcement 1 and making it elongate, generating a pre-tightening force, To achieve the purpose of controlling crack development.

The preferred embodiment of the utility model has been described in detail above, but the utility model is not limited to the specific details in the above-mentioned embodiment, and within the scope of the technical concept of the utility model, various equivalent transformations can be carried out to the technical solution of the utility model , these equivalent transformations all belong to the protection scope of the present utility model.

Claims (7)

1. A self-tightening underground masonry wall penetration crack treatment device when encountering water, characterized in that it includes glass fiber reinforcement (1), thin-walled steel pipe (2), and rubber waterstop strip (3); The thin-walled steel pipe (2) is embedded in the through crack of the wall, and the glass fiber bars (1) are respectively adsorbed on the surfaces of both sides of the wall, and spirally wound on both ends of the thin-walled steel pipe (2); the thin-walled steel pipe ( 2) The outer wall is in close contact with the glass fiber reinforcement (1), and the rubber waterstop strip (3) is placed axially inside the thin-walled steel pipe (2); The thin-walled steel pipe (2) is provided with narrow slits (5) and small holes (7). The rubber waterstop strip (3) absorbs water and expands through the narrow slits (5) and small holes (7). The expansion of the opening of the side wall causes the glass fiber reinforcement (1) to generate a pre-tightening force, thereby limiting the width of cracks in masonry while reinforcing through cracks. 2. A self-tightening underground masonry wall penetrating crack treatment device according to claim 1, characterized in that: two glass fiber bars (1) are arranged at each crack of the wall, and are respectively installed on two In the horizontal and vertical mortar joints on the side wall, the glass fiber reinforcement (1) spans the cracks in the wall along the horizontal direction, the middle part of the glass fiber reinforcement (1) is a spiral reinforcement (6), and the spiral reinforcement (6) is wound It is arranged on the thin-walled steel pipe (2) and is in close contact with both ends of the thin-walled steel pipe (2); Several vertical zigzag anchoring fiber bars (4) are distributed at both ends of the glass fiber bar (1), and the anchoring fiber bar (4) is distributed on both sides of the glass fiber bar (1) along the axial direction. 3. A self-tightening underground masonry wall penetrating crack treatment device according to claim 2, characterized in that: the zigzag anchoring fiber bars (4) are evenly distributed in the axial direction on the glass fiber bars ( The two ends of 1) are perpendicular to the glass fiber bars (1), and the number of anchoring fiber bars (4) at each end is greater than or equal to four; the distance between the zigzag anchoring fiber bars (4) and the wall The masonry has the same size, and the length of the anchoring fiber reinforcement (4) is the same as that of the vertical mortar joint. 4. A self-tightening underground masonry wall penetrating crack treatment device according to claim 1, characterized in that: the elastic modulus of the glass fiber reinforcement (1) is greater than or equal to 7.5×10 ⁴ MPa , the tensile strength is greater than or equal to 550MPa, and the length of the glass fiber reinforcement in the straight section of the wall crack on one side is greater than or equal to 500mm. 5. The self-tightening underground masonry wall penetrating crack treatment device according to claim 2, characterized in that: the number of turns of the spiral rib (6) wrapped around the thin-walled steel pipe (2) is two , the distance between the two spiral ribs (6) is less than the length of the thin-walled steel pipe (2), and the inner diameter of the spiral formed by the spiral ribs (6) is larger than the outer diameter of the thin-walled steel pipe (2). 6. A self-tightening underground masonry wall penetrating crack treatment device according to claim 1, characterized in that: the length of the thin-walled steel pipe (2) is the same as the thickness of the wall, and the thin-walled steel pipe (2) ) wall thickness is less than 2mm; both ends of the thin-walled steel pipe (2) are open without a bottom seal; the side wall is provided with a narrow slit (5), which is located directly above the top of the steel pipe, and the slit width is 2mm; the left and right sides of the steel pipe A number of small holes (7) are opened on both sides and the bottom side wall, the hole diameter is 2 mm, and the spacing is 50 mm; the thin-walled steel pipe (2) is placed vertically in the crack along the thickness direction of the wall, and is wound by the glass fiber reinforcement (1 ) fixed in the crack. 7. The self-tightening underground masonry wall penetrating crack treatment device according to claim 1, characterized in that: the rubber waterstop (3) is cylindrical, and the rubber waterstop (3) It is a PN putty type water-swellable rubber water-stop strip, and the water-absorbing expansion rate is greater than or equal to 200%; the length of the rubber water-stop strip (3) is the same as that of the thin-walled steel pipe (2), and the diameter is smaller than the inner diameter of the thin-walled steel pipe (2). diameter.