CN209923992U

CN209923992U - Rubber aggregate concrete connection slope row pile vibration isolation barrier

Info

Publication number: CN209923992U
Application number: CN201822272374.5U
Authority: CN
Inventors: 韩庆华; 郑刚; 杜一鸣; 梁建文; 巴振宁; 刘铭劼; 燕翔
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-01-10
Anticipated expiration: 2028-12-29

Abstract

The utility model discloses a rubber concrete connection slope campshed vibration isolation protective screen that gathers materials, the vibration isolation protective screen include soil between the stake, be provided with upright campshed, the campshed that leans forward and hypsokinesis campshed in the soil between the stake, upright campshed, the campshed that leans forward and hypsokinesis campshed constitute by rubber concrete placement that gathers materials, the campshed that leans forward and hypsokinesis campshed staggered arrangement between upright campshed, the top of upright campshed is connected through a style of calligraphy coupling beam, upright campshed is connected through W type coupling beam between the top of campshed and the campshed that leans forward, upright campshed and hypsokinesis campshed. The utility model discloses utilize the vibration wave at the phase difference that reflection, refraction and diffraction that takes place formed after meetting the vibration isolation protective screen, effectively reduce vibration wave propagation energy, reach and subtract the vibration isolation purpose, can effectively improve and subtract the vibration isolation effect.

Description

Rubber aggregate concrete connection slope row pile vibration isolation barrier

Technical Field

The utility model belongs to underground and geotechnical engineering and subtract vibration isolation control field, concretely relates to novel material connection campshed that sets up between the source of shaking and the protected object subtracts vibration isolation protective screen structure. The vibration reduction and isolation device is suitable for the surrounding environment of a power foundation.

Background

The vibration of the power machinery foundation in the industrial factory building is generally transmitted to the foundation surrounding the foundation through the foundation bed, and the vibration can cause physical and mental discomfort of surrounding residents, damage to structural buildings and influence on normal production of high-precision industries under the long-term action. The problem is generally regarded by various national scholars, and various effective vibration reduction and isolation measures are sought.

In the aspect of controlling the basic vibration propagation of a power machine, vibration source control and path control for blocking the propagation are two common measures. The most effective mode of vibration source control is to reinforce the foundation bed and the foundation thereof, but for the existing power foundation, the measures are difficult to implement without influencing normal operation, and the cost is often too high, and the vibration control capability is limited. In the aspect of path control for blocking transmission, research of various scholars focuses on barrier vibration isolation, wherein continuous barriers comprise empty ditches, ditches filled with ceramic grains, sand and sawdust, underground continuous walls and the like; the discontinuous barrier is provided with a perforated wave blocking block, a pile row single-row or multi-row powder spraying piles and the like. The traditional barrier vibration isolation has the defects of poor stability, insufficient embedding excavation depth, large construction range which is not enough to achieve the expected vibration reduction effect, easiness in influence of the surrounding environment, limited construction range and the like.

Therefore, a novel vibration isolation barrier is arranged between the power machine foundation and the surrounding existing building to reduce the adverse effect caused by vibration caused by foundation operation, and the novel vibration isolation barrier becomes a preferable scheme for reducing and isolating vibration of the power foundation surrounding site.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough among the prior art, provide a rubber concrete coupling slope row pile vibration isolation protective screen that gathers materials, utilize the vibration wave to meet the vibration isolation protective screen after the phase difference that reflection, refraction and diffraction that take place formed, effectively reduce vibration wave propagation energy, reach and subtract the vibration isolation purpose, can effectively improve and subtract the vibration isolation effect.

The utility model aims at realizing through the following technical scheme:

the utility model provides a rubber aggregate concrete connection slope campshed vibration isolation protective screen, includes the soil between the stake, be provided with upright campshed, the campshed that leans forward and hypsokinesis campshed in the soil between the stake, upright campshed, the campshed that leans forward and hypsokinesis campshed are by the pouring of rubber aggregate concrete and constitute, the campshed that leans forward and hypsokinesis campshed staggered arrangement between the vertical campshed, the top of vertical campshed is connected through a style of calligraphy bracing beam, the vertical campshed is connected through W type bracing beam with the top of the campshed that leans forward, vertical campshed and hypsokinesis campshed.

Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:

1. the utility model discloses a change pile body concrete material, adopt the rubber granule to replace the fine aggregate, the haydite replaces the coarse aggregate, can effectively reduce vibration isolation campshed pile body elastic modulus, and then increases the reflection effect of incident wave within the soil between the stake, increases the dissipation of vibration ability, effectively improves the vibration isolation efficiency of vibration isolation campshed.

2. The forward-inclined row piles and the backward-inclined row piles are arranged between the upright row piles in a staggered mode to form a quincunx vibration isolation row pile barrier system, phase differences generated by refraction, reflection and diffraction of incident waves in the row pile system can be effectively utilized, vibration energy is consumed to the maximum extent, and vibration isolation efficiency is improved; the W-shaped bracing beams among the pile row tops can coordinate the deformation of the pile body in the system and increase the integrity of the vibration isolation pile row barrier system, thereby further improving the vibration isolation efficiency.

3. The inclined pile rows are used as vibration reduction and isolation barriers to form vertical inclined medium variation zones, phase differences caused by reflection, refraction and diffraction of vibration waves on the inclined medium variation zones are utilized, the vibration waves transmitted to a protected structure are weakened, and the vibration reduction and isolation effect of the barriers is improved.

Drawings

Fig. 1 is a plan view schematically illustrating a vibration isolation barrier structure.

Fig. 2 is a sectional view of a planar structure of the vibration isolation barrier structure.

Reference numerals: 1-upright row piles, 2-linear bracing beams, 3-forward inclined row piles, 4-backward inclined row piles, 5-W type bracing beams, 6-site ground surface and 7-inter-pile soil.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model relates to a rubber aggregate concrete connection slope campshed vibration isolation protective screen. The quincunx alternate pile arrangement form is adopted, so that the energy consumption efficiency of the soil between the piles can be effectively improved. As shown in the attached drawing 1, upright row piles 1 are arranged in the inter-pile soil 7, and the forward-inclined row piles 3 and the backward-inclined row piles 4 are arranged between the upright row piles 1 in a staggered mode to form a quincunx alternative arrangement mode. The arrangement form can improve the pile body density of the row pile barrier system and increase the contact area between the pile body and the soil between the piles while minimizing the number of piles, thereby improving the energy consumption efficiency of the soil between the piles. Meanwhile, the tops of the upright piles 1, the forward-inclined piles 3 and the backward-inclined piles 4 are connected by concrete beams in the form of the W-shaped bracing beams 5 and the in-line bracing beams 2. And each row pile after connection can effectively transfer deformation and energy through the connecting beam, so that the integrity of the vibration isolation row pile system is improved, and the energy consumption effect of the row pile barrier system is further improved.

Particularly, the utility model discloses an advantage still embodies the improvement that lies in the pile shaft material. The utility model relates to a vibration isolation row pile body which adopts rubber aggregate concrete material, and adopts rubber and porcelain granules to replace partial fine aggregate and coarse aggregate in the concrete respectively, so as to achieve the effects of reducing the elastic modulus of the pile body and increasing the energy consumption of the row pile system; the method comprises the following specific steps:

firstly, rubber particles with the particle sizes of 5 meshes, 10 meshes, 40 meshes and 60 meshes are prepared according to the proportion of 1: 1: 1: blending the mixture in a proportion of 2 to obtain the rubber aggregate with the fineness modulus of about 2.7, and replacing the fine aggregate with 20 percent of equal volume for preparing the rubber aggregate concrete. Then, ceramsite with the grain size similar to that of the coarse aggregate is adopted, and the coarse aggregate is replaced by 40% of the same volume, so that the concrete is prepared. The elastic model of the pile body can be effectively reduced after the rubber particles are mixed, and the elastic modulus of the reinforced concrete material prepared by the test can be reduced to 10-20 GPa. And the ceramsite is adopted to replace part of coarse aggregate, so that the specific gravity of the concrete coarse aggregate can be effectively reduced, the phenomenon of upward floating of rubber aggregate in the construction process can be avoided, and the construction quality of the rubber aggregate concrete can be effectively controlled.

The prepared concrete is reserved for pouring front and back two rows of upright piles 1, forward inclined piles 3 and backward inclined piles 4. And (3) drilling and pile-forming equipment enters a field, and front and rear two rows of upright row piles 1 are constructed by adopting a drilling and pouring method. The hole is drilled vertically at the surface 6 of the field, and the mud retaining wall technology is adopted to prevent the soil 7 between the piles from collapsing. And then, a steel reinforcement cage is arranged, and rubber aggregate concrete is poured in layers. And a layered pouring mode is adopted, so that the floating of the rubber aggregate is prevented.

And then constructing the forward-inclined row piles 3 and the backward-inclined row piles 4 in a hole jumping manner. Different from the construction mode of the vertical row pile 1, the casing protection wall is adopted for drilling. The casing is lowered into the field soil 7 in a vibroflotation mode, and the inclination of the casing is strictly controlled according to the design. And emptying soil in the casing by using an auger and putting the reinforcement cage into the casing. And (3) pouring rubber aggregate concrete by adopting a layered pouring mode to form a forward-inclined row pile 3 and a backward-inclined row pile 4. After the vertical row piles 1, the forward inclined row piles 3 and the backward inclined row piles 4 are all poured, a template and a reinforcement cage are erected on the ground surface 6 of the site, and the reinforcement cage is welded with the reserved reinforcement bundles on the pile tops of the row piles. And finally, pouring common concrete, and constructing the pile top linear bracing beam 2 and the W-shaped bracing beam 5. And after the strength of the whole structure reaches a design value, the construction of the rubber aggregate concrete connection inclined row pile vibration isolation barrier is finished.

Research shows, adopt the utility model discloses the phase difference that reflection, refraction and diffraction lead to takes place for the change vibration wave that rubber aggregate concrete connection slope row pile vibration isolation protective screen can be more showing, and then reduces the vibration energy transmission. The utility model discloses in adopt the preceding, back slope row of piles of arranging in turn, pile body gradient is at 1: 3-1: 4. As shown in attached figures 1 and 2, the design adopts a front-back alternate arrangement form of upright pile rows and inclined pile rows, three rows are arranged, the three rows of systems can be repeatedly arranged according to the vibration control requirement in the actual engineering, and the system is designed into a repeated multi-row system, so that the vibration energy transfer control effect can be better achieved. The number of the pile rows, the row spacing and the pile spacing are determined according to the vibration source and the characteristics of the site soil, and the pile body depth is determined according to the foundation depth of the controlled building.

The present invention is not limited to the above-described embodiments. The above description of the embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above embodiments are merely illustrative and not restrictive. Without departing from the spirit of the invention and the scope of the appended claims, the person skilled in the art can make many changes in form and detail within the teaching of the invention.

Claims

1. The rubber aggregate concrete connection inclined row pile vibration isolation barrier comprises inter-pile soil and is characterized in that vertical row piles, forward-inclined row piles and backward-inclined row piles are arranged in the inter-pile soil and are formed by pouring rubber aggregate concrete, the forward-inclined row piles and the backward-inclined row piles are arranged between the vertical row piles in a staggered mode, the tops of the vertical row piles are connected through linear connecting beams, and the vertical row piles are connected with the tops of the forward-inclined row piles, the vertical row piles and the tops of the backward-inclined row piles through W-shaped connecting beams.