Preparation and installation method of self-standing sound barrier

Abstract

The invention discloses a preparation and installation method of a self-standing sound barrier, which comprises the following steps: firstly, manufacturing a sound insulation panel mold and a rib column mold with a cavity, arranging the rib column mold on one side of the sound insulation panel mold, and extending the lower end of the rib column mold out of the sound insulation panel mold to form a sound insulation wall mold; then, light high-strength concrete is poured into a sound insulation wall mold, and the sound insulation wall integrally formed by sound insulation panels and rib columns with cavities is manufactured through demolding; then preparing a sound absorption material, and bonding the sound absorption material on the other side of the sound insulation panel, namely the sound source surface, so as to prepare a sound barrier unit; and finally, a mounting groove is reserved in the foundation, the sound barrier units are hoisted to the mounting position, the extending parts of the lower ends of the rib columns extend into the mounting groove to be fixed, the bottom of the sound insulation panel is fixed to the surface of the building or the foundation, and mounting of the single sound barrier unit is completed. The sound barrier units are installed one by one, and the adjacent sound barrier units are fixedly connected into a row. The self-standing sound barrier is reliable in installation, and the stability of the self-standing sound barrier is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction, and in particular to a method for preparing and installing a self-supporting sound barrier. Background Art

[0002] With the development of social economy and the advancement of urbanization, people have higher and higher requirements for solving urban traffic congestion, noise control and other environmental protection issues. A large number of sound barriers have been set up on both sides of the roads and rail transit lines in the cities.

[0003] In recent years, the preparation technology of lightweight high-strength concrete has been continuously improved and promoted to the field of sound barriers. The lightweight high-strength cement sound-absorbing and insulation boards produced have good sound absorption and insulation performance, mechanical properties, weather resistance and durability. They are light in weight and easy to construct, with little burden on the foundation. Their structural types can be varied and their appearance is easy to coordinate with the surrounding environment. They are a highly efficient sound absorption and noise reduction product. When used in combination with sound-absorbing materials, better sound absorption and sound insulation effects can be obtained. At present, they have been applied to highways, railways and viaducts to a certain extent. The conventional practice is to use H-shaped steel columns as the intermediate connecting skeleton, fix the H-shaped steel columns with pre-buried bolts on the ground, insert the 500mm wide lightweight high-strength cement sound-absorbing and insulation boards between the H-shaped steel flanges, and use rubber strips to seal and angle steel and bolts to connect with the steel columns. During on-site construction, it is often difficult to accurately embed ground bolts, which not only affects the fixation of H-shaped steel columns, but also limits the installation accuracy of sound-absorbing and sound-insulating panels. Rubber strips are prone to falling off and bolts are prone to loosening during use. In addition, in open-air environments, steel components are prone to rust, affecting appearance and safety. Summary of the invention

[0004] In view of this, the present invention provides a method for preparing and installing a self-supporting sound barrier, which is reliable in installation and improves the stability of the self-supporting sound barrier.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A method for preparing and installing a self-supporting sound barrier, the method steps are as follows:

[0007] Step 1: making a sound insulation panel mold and a rib column mold with a cavity, setting the rib column mold on one side of the sound insulation panel mold, and the lower end of the rib column mold extends out of the sound insulation panel mold to form a sound insulation wall mold;

[0008] Step 2: pouring lightweight high-strength concrete in a sound insulation wall mold, and demoulding to form a sound insulation wall formed by a sound insulation panel and a rib column with a cavity;

[0009] Step 3, preparing a sound absorbing material, and bonding the sound absorbing material to the other side of the sound insulation panel, i.e., the sound source surface, to form a sound barrier unit;

[0010] Step 4: reserve an installation groove in the foundation, hoist the sound barrier unit to the installation position, extend the protruding part of the lower end of the rib column into the installation groove for fixation, and fix the bottom of the sound insulation panel to the building or foundation surface to complete the installation of a single sound barrier unit;

[0011] Step 5: Install the sound barrier units one by one and connect adjacent sound barrier units into rows.

[0012] Furthermore, the fixing method in step 4 is as follows:

[0013] A steel frame is pre-installed in the installation groove, with the end of the steel frame extending below the bottom of the installation groove; after the sound barrier unit is hoisted to the installation position, the cavity of the rib column is centered and surrounds the steel frame, and the gap between the rib column and the installation groove is filled with fine stone concrete; and the sound insulation panel is fixed to the building or foundation by using the mortar connection method.

[0014] Furthermore, the fixing method in step 4 is as follows:

[0015] A layer of non-shrinkage fine stone concrete is poured on the bottom surface of the installation groove. The end of the steel frame is flush with the bottom of the groove. Stiffening ribs are provided at the end of the steel frame. A welded steel plate is fixed to the bottom of the steel frame, and the welded steel plate is fixed to the bottom of the installation groove with anchor bolts. After the sound barrier unit is hoisted to the installation position, the cavity of the rib column is centered and surrounds the steel frame. The gap between the rib column and the installation groove is filled with fine stone concrete. The sound insulation panel is fixed to the building or foundation using the mortar connection method.

[0016] Furthermore, the step 4 further includes filling the cavity of the rib column with high performance concrete based on coal gangue aggregate.

[0017] Furthermore, the raw material composition of the high-performance concrete based on coal gangue aggregate is as follows: cement 320-380 kg / m 3 , fly ash 60~100kg / m 3 , modified coal gangue fine aggregate 650~800kg / m 3 , modified gangue coarse aggregate 900~1050kg / m 3 , bulk density 1650~1900kg / m 3 .

[0018] Furthermore, the protruding portion of the lower end of the rib column protrudes out of the sound insulation panel by no less than 2 times the maximum side length of the rib column, and the upper end surface of the rib column is located above 1 / 2 of the height of the sound insulation panel.

[0019] Furthermore, the inner surface of the cavity of the rib column is a rough surface, and the difference in convexity and concavity is not less than 4 mm.

[0020] Furthermore, the sound absorbing material is prepared by mixing 20% ​​to 30% cement, 70% to 80% 1 to 3 mm modified coal gangue fine aggregate, 0.5% to 0.7% of polycarboxylic acid water reducer to cement, and a water-binder ratio of 0.18 to 0.22, and then fully stirring and mixing.

[0021] Furthermore, the modified coal gangue fine aggregate preparation method is as follows: using aggregates with three particle size ranges of 2-6 mm, 6-10 mm, and 10-15 mm, respectively, uniformly spraying the aggregates with isobutyltriethoxysilane, and then drying at 50° C. for 2 hours to obtain the aggregates.

[0022] Furthermore, the surface density of the lightweight high-strength concrete material is 30 to 100 kg / m 2 , compressive strength ≥120MPA, flexural strength ≥15MPA, elastic modulus ≥40GPA.

[0023] Beneficial effects:

[0024] 1. The sound barrier of the present invention has light weight, simple structure, easy installation and high precision. The ribs of the sound barrier unit are buried in the building or foundation to a certain depth, and the connection is reliable, which improves the stability of the self-supporting sound barrier. The steel columns and bolt connections are eliminated to avoid the problems of rusting of columns and loosening of bolts, and the weather resistance and durability of non-metallic sound barriers are truly brought into play; the maintenance cost is reduced and the service life is extended.

[0025] In addition, the self-supporting sound barrier facade obtained by the installation method of the present invention has unity and integrity, and can be designed on the sound source surface of the sound barrier unit according to the regional landscape, thereby achieving the effect of improving the landscape of the areas along the line.

[0026] 2. The rib column cavity of the present invention is provided with a steel bar frame or a steel frame pre-buried in the installation groove, which further improves the reliability of the installation connection.

[0027] 3. The present invention pours self-compacting high-strength concrete in the cavity of the rib column to further fix the sound insulation wall and achieve a self-supporting effect.

[0028] 4. The present invention adopts high-performance concrete based on coal gangue aggregate to fill the rib column cavity. On the premise that the compressive strength reaches above 50MPa, the solid waste aggregate is fully utilized and the weight of the concrete is reduced by 10%.

[0029] 5. The lower end of the rib column of the present invention extends out of the sound insulation panel by no less than 2 times the maximum side length of the rib column, and the upper end surface of the rib column is located above 1 / 2 of the height of the sound insulation panel to ensure connection reliability and stability.

[0030] 6. The inner surface of the rib column cavity of the present invention has a certain degree of roughness, and the difference in the concavity and convexity of the rough surface should not be less than 4 mm, which can increase the bonding performance with the filled self-compacting high-strength concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the sound barrier unit of the present invention.

[0032] Figure 2 This is a horizontal cross-section of a lightweight high-strength concrete sound insulation wall.

[0033] Figure 3 This is a schematic diagram of the installation structure of the first embodiment.

[0034] Figure 4 This is a schematic diagram of fixing the steel bar skeleton in Example 1.

[0035] Figure 5 This is a schematic diagram of the installation structure of the second embodiment.

[0036] Figure 6 This is a schematic diagram of fixing the medium-sized steel frame in Example 2.

[0037] Among them, 1-sound insulation panel, 2-cavity, 3-rib column, 4-rough surface, 5-reinforcement skeleton, 6-steel skeleton, 7-foundation, 8-high performance concrete based on coal gangue aggregate, 9-installation groove, 10-steel plate, 11-stiffening rib. DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0039] Embodiment 1

[0040] This embodiment provides a method for preparing and installing a self-supporting sound barrier, and the steps of the method are as follows:

[0041] Step 1: making a sound insulation panel mold and a rib column mold with a cavity, setting the rib column mold on one side of the sound insulation panel mold, and the lower end of the rib column mold extends out of the sound insulation panel mold to form a sound insulation wall mold;

[0042] Step 2: pouring lightweight high-strength concrete in the sound insulation wall mold, demolding to form a sound insulation wall formed by the sound insulation panel 1 and the rib column 3 with the cavity 2; wherein the surface density of the lightweight high-strength concrete material is 30-100 kg / m 2 , compressive strength ≥120MPA, flexural strength ≥15MPA, elastic modulus ≥40GPA.

[0043] Step three, prepare the sound absorbing material, which is made of 20% to 30% cement, 70% to 80% 1 to 3 mm modified gangue fine aggregate, 0.5% to 0.7% polycarboxylic acid water reducer of cement, and a water-cement ratio of 0.18 to 0.22, and then stir and mix them evenly. Among them, the preparation method of modified gangue fine aggregate is as follows: use aggregates with three particle sizes of 2 to 6 mm, 6 to 10 mm, and 10 to 15 mm, and use isobutyl triethoxysilane to evenly spray the aggregates, and then dry them at 50°C for 2 hours. Then bond the sound absorbing material to the sound source surface of the sound insulation panel 1 to form a sound barrier unit.

[0044] Step 4: reserve an installation groove 9 in the foundation 7. The installation groove 9 can be cast in situ or prefabricated. The volume of the installation groove 9 is larger than the volume of the protruding portion of the rib column 3 extending downward from the sound insulation panel 1. The steel frame 5 is pre-installed in the installation groove 9, and the end of the steel frame 5 extends below the bottom of the installation groove 9.

[0045] Hoist the sound barrier unit to the installation position, extend the lower end of the rib column 3 into the installation groove 9, center the cavity 2 of the rib column 3 and surround the steel skeleton 5, and fill the gap between the rib column 3 and the installation groove 9 with fine stone concrete; lay the mortar on the bottom of the sound insulation panel 1 and fix it to the building or foundation 7 to complete the installation of a single sound barrier unit;

[0046] The lower end of the rib column 3 extends out of the sound insulation panel 1 by at least 2 times the maximum side length of the rib column 3, preferably 2 to 5 times the maximum side length. The upper end surface of the rib column 3 is located above 1 / 2 of the height of the sound insulation panel 1. In this embodiment, the rib column 3 has a size of 200mm×200mm, a wall thickness of 30mm, a spacing of 2000mm, and the rib column 3 extends 500mm into the foundation 7.

[0047] Step 5: Install the sound barrier units one by one and connect adjacent sound barrier units into rows.

[0048] Embodiment 2

[0049] This embodiment provides a method for preparing and installing a self-supporting sound barrier, and the steps of the method are as follows:

[0050] Step 1: Make a sound insulation panel mold and a rib column mold with a cavity, set the rib column mold on one side of the sound insulation panel mold, and extend the lower end of the rib column mold out of the sound insulation panel mold to form a sound insulation wall mold;

[0051] Step 2: pouring lightweight high-strength concrete in the sound insulation wall mold, demolding to form a sound insulation wall formed by the sound insulation panel 1 and the rib column 3 with the cavity 2; wherein the surface density of the lightweight high-strength concrete material is 30-100 kg / m 2, compressive strength ≥120MPA, flexural strength ≥15MPA, elastic modulus ≥40GPA.

[0052] Step three, prepare the sound absorbing material, which is made of 20% to 30% cement, 70% to 80% 1 to 3 mm modified gangue fine aggregate, 0.5% to 0.7% polycarboxylic acid water reducer of cement, and a water-cement ratio of 0.18 to 0.22, and then stir and mix them evenly. Among them, the preparation method of modified gangue fine aggregate is as follows: use aggregates with three particle sizes of 2 to 6 mm, 6 to 10 mm, and 10 to 15 mm, and use isobutyl triethoxysilane to evenly spray the aggregates, and then dry them at 50°C for 2 hours. Then bond the sound absorbing material to the sound source surface of the sound insulation panel 1 to form a sound barrier unit.

[0053] Step 4: reserve an installation groove 9 in the foundation 7. The installation groove 9 can be cast in situ or prefabricated. The volume of the installation groove 9 is larger than the volume of the protruding portion of the rib column 3 extending downward from the sound insulation panel 1. A layer of 50 mm thick non-shrinkage fine stone concrete is poured on the bottom of the installation groove 9. The end of the steel frame 6 is flush with the bottom of the groove. A stiffening rib 11 is provided at the end of the steel frame 6. A welded steel plate 10 is fixed to the bottom of the steel frame 6. Anchor bolts are used to fix the welded steel plate 10 to the bottom of the installation groove 9. Double nuts are tightened to fix the steel frame 6. The steel frame 6 can be an H-shaped steel frame.

[0054] Lift the sound barrier unit to the installation position, insert the rib column 3 into the installation groove 9, center the cavity 2 of the rib column 3 and surround the steel frame 6, and fill the gap between the rib column 3 and the installation groove 9 with fine stone concrete; lay the mortar on the bottom of the sound insulation panel 1 and fix it to the building or foundation 7 to complete the installation of a single sound barrier unit.

[0055] The lower end of the rib column 3 extends out of the sound insulation panel 1 by at least 2 times the maximum side length of the rib column 3, preferably 2 to 5 times the maximum side length. The upper end surface of the rib column 3 is located above 1 / 2 of the height of the sound insulation panel 1. In this embodiment, the rib column 3 has a size of 200mm×200mm, a wall thickness of 30mm, a spacing of 2000mm, and the rib column 3 extends 500mm into the foundation 7.

[0056] Step 5: Install the sound barrier units one by one and connect adjacent sound barrier units into rows.

[0057] As an improvement, step 4 of embodiment 1 and embodiment 2 further includes filling the cavity 2 of the rib column 3 with high-performance concrete 8 based on coal gangue aggregate, thereby further fixing the sound insulation wall. The raw material composition of the high-performance concrete 8 based on coal gangue aggregate is as follows: cement 320-380 kg / m 3 , fly ash 60~100kg / m 3, modified coal gangue fine aggregate 650~800kg / m 3 , modified gangue coarse aggregate 900~1050kg / m 3 , bulk density 1650-1900kg / m 3 .

[0058] The inner surface of the cavity 2 of the rib column 3 is a rough surface 4, and the difference in convexity is not less than 4 mm. Preferably, the difference in convexity is 4 mm to 10 mm, which can increase the bonding performance with the high-performance concrete 8 filled with coal gangue aggregate, but the maximum protrusion should maintain a certain gap with the skeleton of the rib column 3, and the gap is preferably more than 100 mm.

[0059] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing and installing a self-supporting sound barrier, characterized in that: The method steps are as follows: Step 1: making a sound insulation panel mold and a rib column mold with a cavity, setting the rib column mold on one side of the sound insulation panel mold, and the lower end of the rib column mold extends out of the sound insulation panel mold to form a sound insulation wall mold; Step 2: pouring lightweight high-strength concrete in a sound insulation wall mold, and demolding to form a sound insulation wall formed by a sound insulation panel and a rib column with a cavity; Step 3, preparing a sound absorbing material, and bonding the sound absorbing material to the other side of the sound insulation panel, i.e., the sound source surface, to form a sound barrier unit; Step 4: reserve an installation groove in the foundation, hoist the sound barrier unit to the installation position, extend the protruding part of the lower end of the rib column into the installation groove for fixation, and fix the bottom of the sound insulation panel to the building or foundation surface to complete the installation of a single sound barrier unit; Step 5: Install the sound barrier units one by one and connect adjacent sound barrier units into rows.

2. The method for preparing and installing a self-supporting sound barrier according to claim 1, characterized in that: The fixing method in step 4 is as follows: A steel frame is pre-installed in the installation groove, with the end of the steel frame extending below the bottom of the installation groove; after the sound barrier unit is hoisted to the installation position, the cavity of the rib column is centered and surrounds the steel frame, and the gap between the rib column and the installation groove is filled with fine stone concrete; and the sound insulation panel is fixed to the building or foundation by using the mortar connection method.

3. The method for preparing and installing a self-supporting sound barrier according to claim 1, characterized in that: The fixing method in step 4 is as follows: A layer of non-shrinkage fine stone concrete is poured on the bottom surface of the installation groove. The end of the steel frame is flush with the bottom of the groove. Stiffening ribs are provided at the end of the steel frame. A welded steel plate is fixed to the bottom of the steel frame, and the welded steel plate is fixed to the bottom of the installation groove with anchor bolts. After the sound barrier unit is hoisted to the installation position, the cavity of the rib column is centered and surrounds the steel frame. The gap between the rib column and the installation groove is filled with fine stone concrete. The sound insulation panel is fixed to the building or foundation using the mortar connection method.

4. The method for preparing and installing a self-supporting sound barrier according to claim 2 or 3, characterized in that: The step 4 further includes filling the cavity of the rib column with high performance concrete based on coal gangue aggregate.

5. The method for preparing and installing a self-supporting sound barrier according to claim 4, characterized in that: The raw material composition of the high performance concrete based on coal gangue aggregate is as follows: cement 320-380 kg / m 3 , fly ash 60~100kg / m 3 , modified coal gangue fine aggregate 650~800kg / m 3 , modified gangue coarse aggregate 900~1050kg / m 3 , bulk density 1650~1900kg / m 3 .

6. The method for preparing and installing a self-supporting sound barrier according to claim 4, characterized in that: The protruding portion of the lower end of the rib column protrudes out of the sound insulation panel by no less than 2 times the maximum side length of the rib column, and the upper end surface of the rib column is located above 1 / 2 of the height of the sound insulation panel.

7. The method for preparing and installing a self-supporting sound barrier according to claim 6, characterized in that: The inner surface of the cavity of the rib column is a rough surface, and the difference in convexity and concavity is not less than 4mm.

8. The method for preparing and installing a self-supporting sound barrier according to claim 1, characterized in that: The sound absorbing material is prepared by mixing 20% ​​to 30% cement, 70% to 80% 1 to 3 mm modified coal gangue fine aggregate, 0.5% to 0.7% of the polycarboxylic acid water reducer with a water-binder ratio of 0.18 to 0.22, and fully stirring and mixing evenly.

9. The method for preparing and installing a self-supporting sound barrier according to claim 8, characterized in that: The modified coal gangue fine aggregate preparation method is as follows: using aggregates with three particle size ranges of 2-6 mm, 6-10 mm, and 10-15 mm, respectively, using isobutyl triethoxysilane to evenly spray the aggregates, and then drying at 50° C. for 2 hours to obtain the obtained aggregates.

10. The method for preparing and installing a self-supporting sound barrier according to claim 1, characterized in that: The surface density of the lightweight high-strength concrete material is 30-100 kg / m 2 , compressive strength ≥120MPA, flexural strength ≥15MPA, elastic modulus ≥40GPA.

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