CN111305098A

CN111305098A - Vibration isolation landscape barrier for continuous undulating terrain

Info

Publication number: CN111305098A
Application number: CN202010113837.2A
Authority: CN
Inventors: 张晓磊; 李建平; 冯世进
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-06-19

Abstract

The invention relates to a vibration isolation landscape barrier for continuous undulating terrain, wherein a vibration isolation landscape barrier is arranged on a propagation path between a vibration source and a vibration receiving body, the vibration isolation landscape barrier is a wavy terrain section formed by a plurality of undulating continuous wave crests and wave troughs, and greening plants are planted at the wave troughs to form a landscape pleasant landscape; this continuous relief topography is not in the limit of traditional rectangle or the ditch barrier of falling trapezoidal cross-section, but carries out nimble design according to natural topography (like earth's surface irrigation canals and ditches, geological conditions), function use and view, excavates the topography of different trough depths, crest height and crest and trough interval, forms continuous relief topography vibration isolation view barrier, reduces the degree of difficulty and engineering volume.

Description

Vibration isolation landscape barrier for continuous undulating terrain

Technical Field

The invention relates to the technical field of vibration reduction and isolation on a propagation path, which is suitable for active and passive vibration isolation of environmental vibration caused by rail transit or strong vibration equipment and the like, in particular to a continuous undulating terrain vibration isolation landscape barrier.

Background

With the rapid development of urbanization construction, various environmental pollution problems are frequent, one of which is the environmental pollution problem caused by artificial vibration, mainly including surrounding environment vibration, noise pollution, long-term ground settlement and the like caused by foundation vibration. Environmental vibrations have a considerable influence on surrounding residents, neighboring buildings, underground pipelines, precision instruments, and the like. The foundation is an intermediate medium for transmitting vibration energy, and the vibration energy is transmitted to the periphery through the rock-soil medium. The vibration wave can be divided into surface wave and body wave according to the wave propagation characteristics, and has the characteristics of slow attenuation of the surface wave and fast attenuation of the body wave. Therefore, when the barrier is designed, better vibration isolation effect can be achieved mainly by carrying out vibration isolation and damping design on the surface waves. A simple and effective conventional vibration isolation measure is to excavate a single void barrier, but the single void usually requires a greater depth of the void, which tends to cause problems with the stability of the walls of the void, thereby limiting the utility of the single void in practical engineering. The multiple shallow trenches can achieve the vibration isolation effect of a single equivalent deep trench, so that the engineering practicability of the empty trenches is enhanced, but certain distance is needed between the shallow trenches to better play the vibration isolation effect, so that the trench barriers occupy a larger area of field; meanwhile, in areas with high groundwater level or raininess, groundwater or surface water easily permeates (flows into) the trench, which not only affects the vibration isolation performance of the empty trench, but also reduces the stability and durability of the empty trench. In order to increase the stability of the hollow ditch, the ditch wall can be sloped, but for the hollow ditch, the slope relief can reduce the vibration isolation effect; or the wall of the trench needs to be supported, thereby increasing the construction cost.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a vibration isolation landscape barrier with continuous undulating terrain, which is low in manufacturing cost and high in stability.

In order to solve the technical problem, the invention is realized as follows:

the utility model provides a vibration isolation view barrier of continuous relief topography which characterized in that: and arranging a vibration isolation landscape barrier on a propagation path between the vibration source and the vibration receiving body, wherein the vibration isolation landscape barrier is a wavy terrain section formed by a plurality of fluctuating continuous wave crests and wave troughs, and greening plants are planted at the wave troughs.

Continuous relief topography vibration isolation view barrier, its characterized in that: big rhizome plants are planted at the wave troughs of the vibration isolation landscape barrier to enhance the vibration isolation effect of the undulating terrain barrier.

Continuous relief topography vibration isolation view barrier, its characterized in that: the wave trough of the vibration isolation landscape barrier close to the vibration source is provided with a drainage ditch to enhance the functional practicability of the barrier.

Continuous relief topography vibration isolation view barrier, its characterized in that: after the construction of the vibration isolation landscape barrier is completed, retesting is carried out, whether the vibrated object meets the environmental vibration requirement is judged, and if the vibrated object meets the environmental vibration requirement, the design is completed; if not, the wave trough is further dug deeply or a filling ditch or a row of piles is arranged at the wave trough, and the vibration isolation effect of the barrier is enhanced by the principle that reflection, scattering or surface waves are converted into body waves.

Continuous relief topography vibration isolation view barrier, its characterized in that: the depth of the filling ditch or the row pile is set to different depths according to geological conditions, and the filling ditch or the row pile is driven into a hard soil layer when the hard soil layer is laid under the filling ditch or the row pile.

Continuous relief topography vibration isolation view barrier, its characterized in that: the vibration isolation landscape barrier is a three-period continuous undulating terrain, and the depth D of the groove is 0.3L_RThe groove pitch R is 1.0L_RWherein L is_RThe Rayleigh wavelength under the dominant frequency of the field needing vibration isolation treatment.

The invention has the beneficial effects that: the principle that the vibration isolation effect superior to that obtained by a single deep groove can be obtained by fully utilizing the mutual coupling action of a plurality of continuous fluctuating wave crests and wave troughs is combined with the topographic landscape design, and the vibration isolation area is made into a wavy topographic landscape with fluctuating height according to the topographic geological change to form a natural environment-friendly vibration wave vibration reduction landscape barrier; green plants and large-rhizome tree species are planted on the undulating terrain, so that the vibration isolation effect of the landscape barrier is improved, and the landscape barrier has the function of a sound insulation barrier; the undulating terrain can be designed into drainage ditches and other application terrains, so that the functionality of the undulating terrain is enhanced; the wave troughs on the undulating topography are provided with filling ditches or row piles, so that the conversion rate of surface waves into body waves is increased, and the vibration isolation effect of the topographic landscape barrier is greatly enhanced. The invention does not damage the ground surface environment, does not need to dig a deep groove, does not need to take supporting measures, can avoid the danger of the collapse of the wall of the traditional groove barrier, and obtains the vibration isolation effect superior to the traditional equivalent deep groove.

Drawings

The invention is described in further detail below with reference to the following figures and embodiments:

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is a schematic diagram of planting large-diameter root system tree species at the bottom of a valley.

Fig. 3 is a schematic view of different shapes formed in combination with terrain and application.

Fig. 4 is a schematic view of filling trenches arranged at the valley bottoms.

Fig. 5 is a schematic illustration of different peak heights and valley depths.

Fig. 6 is a schematic view of the filling trench partially inserted into the underlying hard soil layer.

Reference numbers in the figures: 1 vibration source, 2 vibration isolation landscape barriers, 3 vibration-receiving body, 4 green plants, 5 large rootstock plants, 6 drainage channels and 7 filling channels or row piles.

Detailed Description

As shown in fig. 1: a vibration isolation landscape barrier for continuous undulating terrain is characterized in that a vibration isolation landscape barrier 2 is arranged on a propagation path between a vibration source 1 and a vibration receiving body 3, the vibration isolation landscape barrier 2 is a wavy terrain section formed by a plurality of undulating continuous wave crests and wave troughs, and greening plants 4 are planted at the wave troughs to form a landscape pleasant landscape; this continuous relief topography is not in the limit of traditional rectangle or the ditch barrier of falling trapezoidal cross-section, but carries out nimble design according to natural topography (like earth's surface irrigation canals and ditches, geological conditions), function use and view, excavates the topography of different trough depths, crest height and crest and trough interval, forms continuous relief topography vibration isolation view barrier 2, reduces the degree of difficulty and engineering volume.

If vibration isolation treatment is carried out on a certain field, the dominant frequency is f, soil body parameter information is measured through field test, and the Rayleigh wavelength under the dominant frequency is L_RNow, the vibration isolation design is carried out by utilizing the invention;

as shown in fig. 2: the vibration isolation landscape barrier 2 is a three-period continuous undulating terrain with a ditch depth D of 0.3L_RThe groove pitch R is 1.0L_RAnd a plurality of large rhizome plants 5 are planted at the wave troughs, so that the vibration isolation effect of the undulating terrain barrier is further enhanced, and the large rhizome plants can obtain better vibration isolation effect when being planted at the wave troughs, so that the vibration attenuation effect of the barrier is enhanced.

As shown in fig. 3: according to the practical application requirement, a drainage ditch 6 is designed at the trough of one side close to the vibration source 1, so that the functional practicability of the barrier is enhanced; retesting is carried out after barrier construction is completed, whether the vibrated object meets the environmental vibration requirement is judged, and if the vibrated object meets the environmental vibration requirement, design is completed; if not, the wave troughs are dug further deeply, or as shown in fig. 4 and 5, a filling ditch or row pile 7 is arranged at the wave troughs, so that the vibration isolation performance of the undulating terrain vibration isolation landscape barrier is further enhanced, and the vibration isolation effect of the barrier is enhanced by the principle of reflection, scattering or wave conversion (surface wave is converted into body wave).

As shown in fig. 6: the depth of the filling trench or the row pile 7 is set to different depths according to geological conditions, and when the hard soil layer is laid, the filling trench or the row pile 7 is driven into the hard soil layer.

As a landscape design, plants are planted on the field, and the plants can be planted according to the design of the sound insulation barrier, so that a green and environment-friendly natural vibration-damping sound insulation barrier is formed;

according to the invention, support measures are not needed, slope relief can be carried out between wave crests and wave troughs, and the landscape barrier can still obtain a good vibration isolation effect by planting large rhizome plants 5 or filling ditches or row piles 7 placed in the wave troughs.

In the invention, the continuous undulating terrain formed by a plurality of continuous wave troughs is similar to the vibration isolation barriers of a plurality of ditches, when vibration waves pass through the barrier, surface waves are vertically transmitted between the wave crests and the wave troughs, so that a large amount of vibration wave energy is switched between the surface waves and the body waves, and simultaneously, the vibration isolation effect of the barrier is greatly enhanced due to the coupling effect of the wave troughs. The vibration isolation performance of the invention can be further enhanced by the vibration reduction principles of wave reflection, wave scattering, surface wave conversion into body wave (the body wave is easy to attenuate and has little influence on the ground surface vibration) and the like by arranging the row piles, filling the ditches or planting the large-rhizome plants and the like at the wave troughs, so that the high-efficiency treatment of the vibration wave is realized, and finally, a green and environment-friendly high-efficiency vibration isolation barrier is formed.

While the invention has been described with reference to fig. 1-6, which are presently preferred embodiments of the device of the present invention, it is to be understood that modifications and adaptations thereof may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims

1. The utility model provides a vibration isolation view barrier of continuous relief topography which characterized in that: the vibration isolation landscape protective screen (2) is arranged on a propagation path between the vibration source (1) and the vibration receiving body (3), the vibration isolation landscape protective screen (2) is a wavy terrain section formed by a plurality of continuous wave crests and wave troughs with fluctuating heights, and green plants (4) are planted at the wave troughs.

2. The continuous undulating terrain vibration isolation landscape barrier of claim 1, wherein: big rhizome plants (5) are planted at the wave troughs of the vibration isolation landscape barrier (2) to enhance the vibration isolation effect of the undulating terrain barrier.

3. The continuous undulating terrain vibration isolation landscape barrier of claim 1, wherein: the wave trough of the vibration isolation landscape barrier (2) close to the vibration source (1) is provided with a drainage ditch (6) to enhance the functional practicability of the barrier.

4. The continuous undulating terrain vibration isolation landscape barrier of claim 1, 2, or 3, wherein: after the construction of the vibration isolation landscape barrier (2) is completed, retesting is carried out, whether a vibrated object meets the environmental vibration requirement is judged, and if the vibrated object meets the environmental vibration requirement, the design is completed; if not, the wave trough is further dug deeply or a filling ditch or a row of piles (7) is arranged at the wave trough, and the vibration isolation effect of the barrier is enhanced by the principle that reflection, scattering or surface waves are converted into body waves.

5. The continuous undulating terrain vibration isolation landscape barrier of claim 4, wherein: the depth of the filling ditch or the row pile (7) is set to different depths according to geological conditions, and when the hard soil layer is laid under the filling ditch or the row pile (7), the filling ditch or the row pile is driven into the hard soil layer.

6. The continuous undulating terrain vibration isolation landscape barrier of claim 5, wherein: the vibration isolation landscape barrier (2) is a three-period continuous undulating terrain with the ditch depth D of 0.3L_RThe groove pitch R is 1.0L_RWherein L is_RThe Rayleigh wavelength under the dominant frequency of the field needing vibration isolation treatment.