CN109797731B - Sectional flexible vibration isolation bag, vibration isolation device and method - Google Patents
Sectional flexible vibration isolation bag, vibration isolation device and method Download PDFInfo
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- CN109797731B CN109797731B CN201910122984.3A CN201910122984A CN109797731B CN 109797731 B CN109797731 B CN 109797731B CN 201910122984 A CN201910122984 A CN 201910122984A CN 109797731 B CN109797731 B CN 109797731B
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Abstract
The invention relates to a sectional flexible vibration isolation bag, a vibration isolation device and a method, comprising an inner membrane, wherein the inner membrane encloses to form a cavity, and the outer part of the inner membrane is coated with an outer protective layer; the cavity is filled with vibration isolation media; the cavities comprise an upper cavity, a middle cavity and a lower cavity which are arranged from top to bottom in an isolation mode; the volume of the upper cavity is the same as that of the lower cavity, the volume of the middle cavity is larger than that of the upper cavity, and the pressure of the vibration isolation medium in the middle cavity is smaller than that of the vibration isolation medium in the upper cavity and the lower cavity. The vibration isolation bag can replace sand to fill the empty ditch, and can avoid vibration from being transmitted to a protection area from the vibration isolation bag while avoiding collapse of the empty ditch.
Description
Technical Field
The invention belongs to the technical field of dynamic compaction foundation reinforcement, and particularly relates to a sectional flexible vibration isolation bag, a vibration isolation device and a vibration isolation method.
Background
Dynamic compaction is a common engineering technique in foundation stabilization engineering. The technology generally lifts a heavy hammer with the weight of 10-60 tons for 8-20 meters, so that the heavy hammer falls freely, and the foundation is reinforced by the dynamic impact action of the heavy hammer. In the reinforcing process, surface waves and transverse waves generated by the dynamic compaction can cause adverse vibration influence on the surrounding environment, even damage to surrounding structures, underground facilities, related equipment and instruments and the like can be caused in serious conditions, the safety of the structures is influenced, and the engineering application of the dynamic compaction technology under the vibration sensitive environment condition is severely restricted.
The prior art has the following disadvantages:
1) in the prior art, a hollow groove with enough depth is generally adopted as a vibration isolation barrier to obtain an ideal vibration isolation effect, but because the stability of the wall of the hollow groove with larger depth is difficult to ensure, only shallow hollow groove vibration isolation can be adopted in actual engineering, and because the depth is shallow, the vibration isolation effect is generally poor;
2) in order to maintain the stability of the vibration isolation ditch, materials such as gravels are often filled in the ditch in engineering, so that the vibration isolation effect is further reduced; the vibration isolation efficiency of the traditional discontinuous barriers such as pile holes, pile columns and the like is low, and the expected effect is generally difficult to achieve;
3) in part engineering work progress, add flexible vibration isolation device (like gasbag, water pocket) in the vibration isolation ditch, but the vibration isolation material does not carry out the pertinence setting according to the different atress differences of high department of vibration isolation ditch among the prior art, has caused the waste of outside protective material and vibration isolation material.
4) In part of engineering construction processes, flexible vibration isolation devices (such as air bags and water bags) are added in the vibration isolation trenches, but no guide and installation equipment matched with flexible vibration isolation materials is provided, so that inconvenience in installation and use of the flexible vibration isolation devices is caused.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned deficiencies of the prior art, and provides a sectional flexible vibration isolation bag, a vibration isolation device and a method thereof.
The first purpose of the invention is to provide a sectional flexible vibration isolation bag to replace sand to fill the empty ditch, and avoid the collapse of the empty ditch and the vibration transmission from the vibration isolation bag to the protection area.
A second object of the present invention is to provide a vibration isolation device based on a sectioned flexible vibration isolation bag, which can be quickly installed in a vibration isolation empty trench or directly inserted into the ground to form a vibration isolation layer.
The third purpose of the invention is to provide a sectional flexible vibration isolation method, which utilizes the sectional flexible vibration isolation device to realize the blocking of surface waves and transverse waves in the dynamic compaction process.
In order to achieve the purpose, the invention adopts the following technical scheme: a sectional flexible vibration isolation bag comprises an inner film, wherein a cavity is formed by enclosing the inner film, and an outer protective layer is coated outside the inner film; the cavity is filled with vibration isolation media; the cavities comprise an upper cavity, a middle cavity and a lower cavity which are arranged from top to bottom in an isolation mode; the volume of the upper cavity is the same as that of the lower cavity, the volume of the middle cavity is larger than that of the upper cavity, and the pressure of the vibration isolation medium in the middle cavity is smaller than that of the vibration isolation medium in the upper cavity and the lower cavity.
The inner membranes are used for enclosing to form a cavity, vibration isolation media are filled in the cavity, the flexible vibration isolation bags can be continuously placed in a foundation between a dynamic compaction field and a vibration protection area on the basis of the principle that dynamic compaction vibration surface waves and transverse waves cannot be propagated through liquid and gas, and vibration isolation plates with thin thickness and large depth are formed after the vibration isolation media are filled, so that the effects of isolating vibration and preventing the wall collapse of the groove are achieved.
Meanwhile, different gases and liquids can be filled in the vibration isolation bag to serve as vibration isolation media; the vibration isolation bag is partitioned (namely an upper cavity, a middle cavity and a lower cavity) according to horizontal soil pressure distribution of different depths of the dynamic compaction foundation, different partitions adopt materials with different strengths, and all partitions respectively stamp according to soil side pressure and dynamic compaction impact force so as to reasonably utilize the material strength.
Further, the inner film and the outer protective layer are both made of flexible materials.
Adopt flexible material can effectually realize the coupling of outer protective layer and vibration isolation groove for the surface and the vibration isolation groove in close contact with of outer protective layer avoid the vibration isolation groove to collapse.
Further, inflation ports are formed in the inner membranes outside the upper cavity, the middle cavity and the lower cavity.
The inner membrane is provided with a plurality of inflation ports, the inflation ports can be communicated with external inflation equipment after penetrating through the outer protective layer, vibration isolation media with different pressures can be filled into different cavities through different required pressures at different depths of the vibration isolation groove, and the strength of the materials is utilized in a resultant force mode.
Further, the vibration isolation medium includes a gas or a liquid.
A segmental flexible vibration isolation device utilizes segmental flexible vibration isolation bags, and further comprises a guide device and a plate inserting device, wherein the guide device is arranged below the segmental flexible vibration isolation bags and is used for guiding the segmental flexible vibration isolation bags to enter a vibration isolation groove or be directly inserted into the ground;
the plate inserting device is arranged above the guide device and is used for driving the guide device.
By adopting the matching of the guide device and the inserting plate device, the flexible vibration isolation bag at the subarea can be quickly and accurately installed into the vibration isolation groove, and the vibration isolation bag filled with vibration isolation medium can be in close contact with the side wall of the vibration isolation groove, so that the purpose of vibration isolation is effectively realized.
Furthermore, the guiding device comprises two clamping pieces which are rotatably connected, the opposite side surfaces of the two clamping pieces are respectively provided with an occlusion tooth, the upper end surfaces of the clamping pieces are respectively provided with a connection point, and the connection points are used for connecting the flashboard device.
The two clamping pieces are rotatably connected, the clamping pieces can be meshed with the vibration isolation bag in an uninflated state when being closed, the vibration isolation bag can be driven to move downwards while the clamping pieces are driven to move by the inserting plate device, and meanwhile, the clamping pieces can be opened along with the vibration isolation bag after the vibration isolation bag is filled with vibration isolation media and expanded.
Further, the bottom of two clamping pieces is crisscross respectively to be provided with rotates the cover, be equipped with the bolt in rotating the cover, the bolt passes in proper order and rotates two clamping pieces after a plurality of rotate the cover and connect, and the end of bolt is provided with the nut.
Further, the plate inserting device comprises a hydraulic push rod, the bottom end of the push rod in the hydraulic push rod is in contact with the connecting point, and the top end of the hydraulic push rod is fixedly arranged on the ground through a support.
The hydraulic push rod is used as a plate inserting device, and the guide device and the vibration isolation bag can be rapidly inserted into the vibration isolation groove in a specific area.
A method of sectioned flexible vibration isolation comprising the steps of:
1) clearing and leveling a construction site, and determining a reasonable embedding position of a vibration isolation device between a dynamic compaction working area and a protection area according to the construction site conditions and vibration control requirements;
2) determining the depth and the vibration isolation length of the vibration isolation groove according to the vibration size and the protection area range of a construction site;
3) protecting the bottom end of the vibration isolation bag, clamping the vibration isolation bag by using a guide device, inserting a plurality of sectionalized flexible vibration isolation bags into the vibration isolation groove one by one along one side of the determined vibration isolation groove, and ensuring that the adjacent vibration isolation bags are tightly spliced;
4) firstly, filling vibration isolation media into vibration isolation bags at two ends of a vibration isolation groove to enable the pressure of each cavity to reach a design value; then filling vibration isolation media into every other vibration isolation bag until the pressure reaches a design value; finally filling the vibration isolation medium of the rest vibration isolation bags; the pressure of different cavities of each vibration isolation bag is determined according to the embedding depth and the dynamic load strength;
5) constructing a dynamic compaction working area;
6) after the dynamic compaction construction is finished, opening a valve of the vibration isolation bag to separate the outer wall of the vibration isolation bag from the inner wall of the vibration isolation groove;
7) the vibration isolation bag is drawn out from the vibration isolation groove and cleaned and maintained so as to be used repeatedly;
8) and grouting the vibration isolation groove to completely seal the vibration isolation groove.
The invention has the beneficial effects that:
according to the invention, the vibration isolation materials are filled in the sectional flexible vibration isolation bags, so that deep part vibration isolation of a foundation can be realized, the vibration isolation effect is good, and the collapse of the groove wall caused by over-deep grooving can be prevented; gas or liquid is used as a vibration isolation medium, so that the vibration isolation efficiency is high;
the partitioned vibration isolation bag partitions the cavity according to pressure distribution, and the volume of the upper cavity, the volume of the middle cavity and the volume of the lower cavity are different from the pressure of a vibration isolation medium, so that the strength of the material can be reasonably utilized, and the material is saved; the vibration isolation bag is inserted into the guide device for construction, so that the construction efficiency can be greatly improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a front view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic sectional view showing the entire structure of embodiment 1 of the present invention;
fig. 3 is an exploded view of a guide device in embodiment 2 of the present invention;
fig. 4 is an isometric view of a guide device in embodiment 2 of the invention;
fig. 5 is a schematic view of the overall structure of the vibration isolation medium according to embodiment 2 of the present invention when not filled with the vibration isolation medium;
fig. 6 is a schematic view of the overall structure of the vibration isolation medium according to embodiment 2 of the present invention after being filled with the vibration isolation medium;
fig. 7 is a schematic view of a plurality of segmental vibration isolation devices used in combination according to embodiment 3 of the invention.
In the figure: 1. an inflation inlet; 2. an outer protective layer; 3. an inner membrane; 4. an upper cavity; 5. a middle cavity; 6. a lower cavity; 7. a clip; 8. a bolt; 9. a nut; 10. engaging teeth; 11. and connecting points.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide a preferred description of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Preferably, the inner film 3 and the outer protective layer 2 are both made of flexible materials.
Specifically, the inner membrane 3 is made of a flexible membrane material with certain elasticity, one of the flexible membrane material is rubber, and the formed inner membrane 3 has the characteristic of strong pressure bearing capacity. The outer protective layer 2 is made of single-layer or multi-layer flexible woven materials with enough strength and certain elasticity, wherein one of the materials is made of nylon, and the outer protective layer has the characteristics of wear resistance and puncture resistance.
But the materials of the inner film 3 and the outer protective layer 2 are not limited as long as the use requirements can be met.
Specifically, the inner membrane 3 and the outer protective layer 2 may be made of a composite material having an integral structure by fusing, bonding, weaving, or the like, or may be partially bonded or not bonded between layers.
Preferably, the inner films 3 outside the upper cavity 4, the middle cavity 5 and the lower cavity 6 are provided with inflation ports 1.
Preferably, the vibration isolation medium comprises a gas or a liquid.
the plate inserting device is arranged above the guide device and is used for driving the guide device.
Preferably, the guiding device comprises two clamping pieces 7 which are rotatably connected, the opposite side surfaces of the two clamping pieces 7 are respectively provided with an engaging tooth 10, the upper end surfaces of the clamping pieces 7 are respectively provided with a connecting point 11, and the connecting points 11 are used for connecting the flashboard device.
Preferably, the bottom of two clamping pieces 7 is crisscross respectively to be provided with rotates the cover, be equipped with bolt 8 in rotating the cover, bolt 8 passes in proper order and rotates two clamping pieces 7 after a plurality of rotation cover and connect, and bolt 8's end is provided with nut 9.
Specifically, the length of the guide device is slightly wider than the width of the vibration isolation bag, and the thickness of the guide device during insertion (i.e. after closing) is generally not more than 10 cm. The width of the groove after inserting the guide device should be smaller than the width of the vibration isolation plate.
The clamping piece 7 is made of hard plastic or metal material, and the bolt 8 and the nut 9 are made of metal material.
The clamp can be opened along with the inflation thickening of the vibration isolation plate, and the vibration isolation plate is ensured to be tightly attached to the side wall. When the vibration isolation plate is deflated and pulled out, the clamp is further opened under the resistance of the foundation soil, and the occlusion teeth 10 are released, so that the vibration isolation bag is pulled out smoothly.
Preferably, the plate inserting device comprises a hydraulic push rod, the bottom end of the push rod in the hydraulic push rod is in contact with the connecting point 11, and the top end of the hydraulic push rod is fixedly arranged on the ground through a support.
the length of the vibration isolation groove is determined according to the range of the dynamic compaction working area and the protection area, and the length of the protection area is generally exceeded by the two sides of the vibration isolation groove; the depth of the vibration isolation groove is determined according to the dynamic compaction energy.
Step 1) clearing and leveling a construction site, and determining a reasonable embedding position of a vibration isolation device between a dynamic compaction working area and a protection area according to construction site conditions and vibration control requirements;
step 2) determining the depth and the vibration isolation length of the vibration isolation groove according to the vibration size and the protection area range of a construction site;
step 3) protecting the bottom end of the vibration isolation bag, then clamping the vibration isolation bag by using a guiding device, inserting a plurality of sectionalized flexible vibration isolation bags into the vibration isolation groove one by one along one side of the determined vibration isolation groove, and ensuring that the adjacent vibration isolation bags are tightly spliced;
step 4), firstly, filling vibration isolation media into the vibration isolation bags at the two ends of the vibration isolation groove to enable the pressure of each cavity to reach a designed value; then filling vibration isolation media into every other vibration isolation bag until the pressure reaches a design value; and finally, filling the vibration isolation medium in the residual vibration isolation bags. The pressure of each vibration isolation bag partition is determined according to the embedding depth and the dynamic load strength;
step 5), constructing a dynamic compaction working area;
and 6) after the dynamic compaction construction is finished, opening a valve of the vibration isolation bag to separate the outer wall of the vibration isolation bag from the inner wall of the groove.
And 7) extracting the vibration isolation bag from the groove, and cleaning and maintaining the vibration isolation bag for repeated use.
And 8) grouting the ditched groove to completely seal the ditched groove.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. The sectional flexible vibration isolation bag is characterized by comprising an inner membrane, wherein the inner membrane encloses to form a cavity, and an outer protective layer is coated outside the inner membrane;
the cavity is filled with vibration isolation media; the cavities comprise an upper cavity, a middle cavity and a lower cavity which are arranged from top to bottom in an isolation mode;
the volumes of the upper cavity and the lower cavity are the same, the volume of the middle cavity is larger than that of the upper cavity, and the pressure of the vibration isolation medium in the middle cavity is smaller than that of the vibration isolation medium in the upper cavity and the lower cavity;
and the upper cavity, the middle cavity and the lower cavity are filled with vibration isolation media with different strengths.
2. The segmented flexible vibration isolation bag according to claim 1, wherein said inner membrane and said outer protective layer are both flexible.
3. The segmented flexible vibration isolation bag according to claim 2, wherein said inner membrane is provided with an air inlet on the outside of said upper, middle and lower cavities.
4. The segmented flexible vibration isolation bag according to claim 2, wherein said vibration isolation medium comprises a gas or a liquid.
5. A sectioned flexible vibration isolation device, which utilizes the sectioned flexible vibration isolation bag according to any one of claims 1 to 4, further comprising a guide device and a board insertion device, wherein the guide device is arranged below the sectioned flexible vibration isolation bag, and the guide device is used for guiding the sectioned flexible vibration isolation bag to enter the vibration isolation groove or directly insert into the ground;
the plate inserting device is arranged above the guide device and is used for driving the guide device;
the guiding device comprises two clamping pieces which are rotatably connected, the opposite side surfaces of the two clamping pieces are respectively provided with an occlusion tooth, the upper end surfaces of the clamping pieces are respectively provided with a connecting point, and the connecting points are used for connecting the flashboard device.
6. The sectionalized flexible vibration isolating device according to claim 5, wherein the bottom ends of the two clamping pieces are respectively provided with rotating sleeves in a staggered manner, the rotating sleeves are provided with bolts, the bolts sequentially penetrate through the plurality of rotating sleeves to rotatably connect the two clamping pieces, and the tail ends of the bolts are provided with nuts.
7. The sectionalized flexible vibration isolating device according to claim 5, wherein the plate inserting device comprises a hydraulic push rod, the bottom end of the push rod in the hydraulic push rod is in contact with the connection point, and the top end of the hydraulic push rod is fixedly arranged on the ground through a support.
8. A segmental flexible vibration isolation method using the segmental flexible vibration isolation device according to any one of claims 5 to 7, comprising the steps of:
step 1, clearing and leveling a construction site, and determining a reasonable embedding position of a vibration isolation device between a dynamic compaction working area and a protection area according to construction site conditions and vibration control requirements;
step 2, determining the depth and the vibration isolation length of the vibration isolation groove according to the vibration size and the protection area range of a construction site;
step 3, clamping the bottom end of the vibration isolation bag after protection by using a guide device, inserting the flexible vibration isolation bags of the plurality of subsections into the vibration isolation groove one by one along one side of the determined vibration isolation groove, and ensuring that the adjacent vibration isolation bags are tightly spliced;
step 4, filling vibration isolation media into the vibration isolation bags at the two ends of the vibration isolation groove to enable the pressure of each cavity to reach a designed value; then filling vibration isolation media into every other vibration isolation bag until the pressure reaches a design value; finally filling the vibration isolation medium of the rest vibration isolation bags; the pressure of each vibration isolation bag partition is determined according to the embedding depth and the dynamic load strength;
step 5, performing dynamic compaction working area construction;
step 6, after the dynamic compaction construction is finished, opening a valve of the vibration isolation bag to separate the outer wall of the vibration isolation bag from the inner wall of the groove;
step 7, the vibration isolation bag is drawn out from the groove and cleaned and maintained so as to be reused;
and 8, grouting the ditched groove to completely seal the ditched groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910122984.3A CN109797731B (en) | 2019-02-19 | 2019-02-19 | Sectional flexible vibration isolation bag, vibration isolation device and method |
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| CN201910122984.3A CN109797731B (en) | 2019-02-19 | 2019-02-19 | Sectional flexible vibration isolation bag, vibration isolation device and method |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110700330B (en) * | 2019-10-18 | 2021-04-06 | 温州大学 | Ground barrier damping device |
| CN110820830B (en) * | 2019-11-08 | 2021-07-09 | 山东大学 | Device for arranging vibration isolation air bag by utilizing high-pressure water jet grooving and using method |
| CN110792008B (en) * | 2019-11-19 | 2022-02-11 | 广州大学 | Construction method for vibration isolation of track |
| CN113007030B (en) * | 2019-12-19 | 2023-05-05 | 新疆金风科技股份有限公司 | Tower, forming method, wind generating set and protective cover |
| CN114319312A (en) * | 2022-02-10 | 2022-04-12 | 中建东设岩土工程有限公司 | Peripheral foundation shock-absorbing structure during blasting |
| CN114809116B (en) * | 2022-04-14 | 2023-02-03 | 中国科学院地理科学与资源研究所 | Columnar vibration isolation bag for reducing vibration influence of subway and bridge and construction method thereof |
| CN115126007B (en) * | 2022-07-29 | 2023-02-24 | 山东大学 | Static pressure type flexible vibration isolation air bag plate inserting machine and construction method |
| CN115217161A (en) * | 2022-07-29 | 2022-10-21 | 山东高速集团有限公司 | Flexible vibration isolation construction device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2804217Y (en) * | 2005-01-28 | 2006-08-09 | 佐藤孝典 | Damping absorption device |
| ITTO20070015A1 (en) * | 2007-01-11 | 2007-04-12 | Roma E Associati Srl | ANTI-VIBRATION SYSTEM IN THE SOIL |
| CN103938657B (en) * | 2014-05-09 | 2015-08-05 | 山东大学 | Vibration isolation panel assembly in soil treatment engineering and construction technology thereof |
| CN108221503A (en) * | 2017-12-25 | 2018-06-29 | 同济大学 | A kind of flush type vibration isolation sky ditch precast static pressure sheet pile and its construction method |
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