CN220247018U - Composite vibration isolation structure - Google Patents

Abstract

The utility model provides a composite vibration isolation structure, which comprises: the vibration isolation ditch is arranged between the dynamic compaction vibration source and the building; the pile foundations are arranged in a staggered manner and are vertically arranged in the stratum below the vibration isolation ditch; and the bottom end of the drain pipe is inserted into the stratum below the vibration isolation ditch, the top end of the drain pipe extends to the outer side of the vibration isolation ditch, and a drain hole is formed in the part of the drain pipe located in the stratum. The utility model can solve the technical problem of vibration isolation of the existing deep foundation.

Description

Composite vibration isolation structure

Technical Field

The utility model belongs to the technical field of foundation vibration isolation, and particularly relates to a composite vibration isolation structure.

Background

The dynamic compaction method has the advantages of simple equipment, convenient construction, material saving, economy, practicability and the like, and is widely applied to foundation treatment in the fields of building engineering, port engineering, municipal engineering and the like. However, strong vibrations are generated during the dynamic compaction process, and these vibrations propagate in the form of vibration waves in the earth's surface and deep soil of the foundation, causing deformation of the foundation soil, and thus affecting the safety of the surrounding existing building (construction). The influence of vibration generated by dynamic compaction on the existing building (construction) mainly comprises: (1) The strong vibration directly causes cracks of the existing building (structure) so as to influence the normal use function and safety of the building (structure); (2) The vibration does not directly cause cracks to the building (structure), but a plurality of times of ramming causes accumulated damage to the interior of the building (structure), and the use of the building (structure) is influenced over time; (3) Vibration does not directly affect the building, but affects surrounding building by causing soil mass changes (e.g., vibration liquefaction, uneven settlement of the foundation, etc.).

For the foundation vibration isolation measures of vibration caused by dynamic compaction construction, a common mode is to provide a ditch type barrier or a row pile type barrier for vibration isolation. For the dynamic compaction construction of medium and high energy levels, the problem of vibration isolation of deep foundation is also involved, if the depth of a vibration isolation empty trench is too shallow, the vibration isolation effect is not ideal, and the vibration of deep soil cannot be isolated; if too deep, collapse tends to occur. If the single-row piles are adopted for vibration isolation, vibration waves are easy to continuously spread through soil among the piles, and the vibration isolation effect is not ideal; if double rows or multiple rows of piles are adopted, vibration isolation cost tends to be obviously increased.

Disclosure of Invention

The utility model aims to provide a composite vibration isolation structure which can solve the technical problem of vibration isolation of the existing deep foundation.

The utility model is realized by the following technical scheme:

a composite vibration isolation structure comprising:

the vibration isolation ditch is arranged between the dynamic compaction vibration source and the building;

the pile foundations are arranged in a staggered manner and are vertically arranged in the stratum below the vibration isolation ditch;

and the bottom end of the drain pipe is inserted into the stratum below the vibration isolation ditch, the top end of the drain pipe extends to the outer side of the vibration isolation ditch, and a drain hole is formed in the part of the drain pipe located in the stratum.

Further, the part of the drain pipe in the stratum is filled with graded broken stone, and nylon net is wound outside the drain pipe.

Further, the number of the drainage pipes is two, and the two drainage pipes are respectively arranged at two ends of the vibration isolation ditch.

Further, the pile foundation is a prestressed concrete pipe pile, and the bottom of the pile foundation is provided with a pile tip.

Further, the cross section of the vibration isolation groove is in an inverted trapezoid shape.

Further, the bottom width of the vibration isolation trench is 0.8m-1.4m, and the top width of the vibration isolation trench is more than 0.5 m.

Further, the depth of the vibration isolation groove is 2m-4m.

Compared with the prior art, the utility model has the beneficial effects that: the vibration isolation groove and the pile foundations of a plurality of rows form a whole body as the core of the vibration isolation structure, so that the design integrates the advantages of continuous and discontinuous barrier vibration isolation, a good vibration isolation effect is realized on an economic basis, the vibration isolation groove is utilized at a shallower part to perform vibration isolation, the characteristic that the vibration isolation groove can well block propagation of vibration waves is exerted, the whole effect of the barrier formed by the pile foundations of a plurality of rows is utilized to isolate vibration, the difficulty brought to construction and maintenance due to the fact that the required vibration isolation groove is too deep is avoided, and a whole body formed by the vibration isolation groove and the vibration isolation groove forms a complete vibration isolation barrier, so that a good vibration isolation effect can be obtained; and by arranging the drain pipe, water in the vibration isolation trench can be continuously pumped and discharged in the whole process of the bottom pile foundation construction and the dynamic compaction reinforced foundation construction, so that the vibration isolation trench is continuously in an empty trench non-filling state, and the optimal vibration isolation effect of the vibration isolation trench is ensured.

Drawings

Fig. 1 is a schematic structural view of a composite vibration isolation structure of the present utility model;

fig. 2 is a top view of the composite vibration isolation structure of the present utility model.

In the figure, 1-vibration isolation ditch, 2-drain pipe, 3-pile foundation, 4-pile tip, 5-graded broken stone, 6-nylon net, 7-dynamic compaction vibration source and 8-building.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of the composite vibration isolation structure of the present utility model, and fig. 2 is a top view of the composite vibration isolation structure of the present utility model. The utility model provides a compound vibration isolation structure, includes isolation ditch 1, a plurality of row pile foundation 3 and drain pipe 2, and isolation ditch 1 sets up between dynamic compaction vibration source 7 and building 8, and a plurality of row pile foundation 3 staggered arrangement, and vertical setting is in the stratum below isolation ditch 1, and in the stratum below isolation ditch 1 was inserted to the bottom of drain pipe 2, the top of drain pipe 2 stretches out to isolation ditch 1 outside, and the wash port has been seted up to the part that drain pipe 2 is located the stratum.

The vibration isolation ditch 1 is an empty ditch with a certain depth between the dynamic compaction vibration source 7 and the existing building 8, and the length of the vibration isolation ditch 1 needs to exceed two sides of the existing building 8 to form diffraction-proof sections for isolating the propagation of vibration waves generated by the dynamic compaction vibration source 7 in the stratum. To increase the self-stabilizing height of the trench wall and the vibration isolation effect of the vibration isolation trench 1, in one embodiment, the cross section of the vibration isolation trench 1 is inverted trapezoid. The vibration isolation trench 1 adopts an inverted trapezoid with a wide upper part and a narrow lower part, compared with the traditional vibration isolation trench 1 with a rectangular cross section with the same width up and down, the self-stabilization capability of the trench wall of the vibration isolation trench 1 can be improved, and the vibration isolation effect of the vibration isolation trench 1 in the depth direction can be further enhanced.

In order to achieve a good vibration isolation effect of the vibration isolation trench 1, in one embodiment, the bottom width of the vibration isolation trench 1 is 0.8m-1.4m, and the top width of the vibration isolation trench 1 is greater than the bottom width by more than 0.5 m. In one embodiment, the isolation trenches 1 have a depth of 2m-4m.

The pile foundations 3 of a plurality of rows play a role of an integral barrier, a large effective shielding area can be obtained by arranging the pile foundations 3, and the bottoms of the pile foundations are deeper than the underground vibration source by more than 2 m. The pile foundations 3 of a plurality of rows are staggered and arranged to form a quincuncial shape, so that the continuity and the integrity of the barrier are improved, diffraction and diffraction of deep vibration waves are reduced, and the vibration isolation effect of the vibration isolation structure in the horizontal direction is improved. Preferably, the number of rows of pile foundations 3 is set to two rows of pile foundations 3.

In one embodiment, the pile foundation 3 is a prestressed concrete pile, and the pile tip 4 is arranged at the bottom of the pile foundation 3. Compared with the common reinforced concrete cast-in-place pile, the prestressed concrete tubular pile has better crack resistance and larger rigidity, reduces the consumption of steel bars and the whole section size on the basis of ensuring the structural strength, saves materials and reduces dead weight. The prestressed concrete pipe pile is circular, the pile tip 4 is arranged at the bottom of the pile foundation 3, and the end resistance and the side resistance of the soil body to the sinking process of the pile foundation 3 are reduced, so that the pile foundation 3 can be sunk into the ground from the bottom of the vibration isolation ditch 1 in a static pressure pile sinking mode, on one hand, the sinking depth of the pile foundation 3 is increased, the vibration isolation range of the deep soil body is widened, on the other hand, the static pressure pile sinking construction is noiseless, pollution-free and vibration-free, the construction is simple and convenient, and the influence on the existing building 8 in the construction process of the pile foundation 3 can be avoided. In one embodiment, the pile tip 4 is a conical concrete pile tip or a steel pile tip.

In order to achieve a good vibration isolation effect for several rows of pile foundations 3, in one embodiment, the outer diameter of the pile foundations 3 is 300-600 mm. In one embodiment, the center-to-center distance of pile foundation 3 is 1.5-2.0 times the outer diameter of pile foundation 3.

The bottom end of the drain pipe 2 is inserted into the stratum below the vibration isolation ditch 1, so that the drain pipe 2 can be vertically arranged, preferably, the bottom end of the drain pipe 2 is inserted into the stratum for more than 0.5 meter, and the drain pipe 2 can continuously pump and drain water in the vibration isolation ditch 1 in the whole process of construction of the bottom pile foundation 3 and construction of the dynamic compaction reinforced foundation, so that the vibration isolation ditch 1 is continuously in an empty ditch non-filling state, and the optimal vibration isolation effect of the vibration isolation ditch 1 is ensured. Preferably, the top end of the drain pipe 2 is directed away from the side of the existing building 8.

In one embodiment, the portion of the drain pipe 2 located in the formation is filled with graded crushed stone 5 and externally wrapped with nylon mesh 6. Nylon wire 6 wraps up drain pipe 2 bottom, and at the in-process that draws water through drain pipe 2, grading rubble 5 and nylon wire 6 can prevent that soil from getting into drain pipe 2, avoid soil from getting into drain pipe 2 and leading to drain pipe 2 to block up, play the effect that prevents drain pipe 2 siltation to guarantee that drain pipe 2 can normally draw water, guarantee that vibration isolation ditch 1 is in the empty ditch non-filling state continuously. In one embodiment, the number of the drain pipes 2 is two, and two drain pipes 2 are respectively provided at both ends of the vibration isolation trench 1. Two drain pipes 2 are provided, so that water in the vibration isolation trench 1 can be quickly discharged.

The following is a simple description of the construction process of the composite vibration isolation structure of the present utility model:

s1: comprehensively determining the plane position of the vibration isolation trench 1 according to the allowable vibration standard of the peripheral existing building 8, the distance between the vibration isolation trench 1 and the existing building 8, the length of the existing building 8, the vibration propagation influence range of the earth surface dynamic compaction vibration source 7 and the like, and excavating the vibration isolation trench 1 by adopting an excavator to ensure that the bottom width of the vibration isolation trench 1 is 0.8m-1.4m, and the top width of the vibration isolation trench 1 is more than 0.5 m;

s2: trimming the soil bodies of the side slopes at the two sides of the vibration isolation ditch 1 by adopting a digging machine until the side slopes can be self-stabilized;

s3: a drain pipe 2 is buried at the head end and the tail end of the bottom of the vibration isolation ditch 1 respectively, and a water outlet at the top of the drain pipe 2 extends to one side of the vibration isolation ditch 1 far away from the existing building 8;

s4: firstly, arranging a row of prestressed concrete pipe piles from one end of the vibration isolation ditch 1 to the other end of the vibration isolation ditch 1 in a static pressure pile sinking mode according to a determined pile row spacing, and arranging another row of prestressed concrete pipe piles at the other side of the bottom of the vibration isolation ditch 1; the two rows of pipe piles are arranged in a plum blossom shape, and the bottoms of the pipe piles are deeper than the underground vibration source by more than 2 m.

Compared with the prior art, the utility model has the beneficial effects that: the vibration isolation ditch 1 and the pile foundations 3 of a plurality of rows form a whole body as the core of the vibration isolation structure, so that the design integrates the advantages of continuous and discontinuous barrier vibration isolation, a good vibration isolation effect is realized on an economic basis, the vibration isolation ditch 1 is utilized in a shallower part to perform vibration isolation, the characteristic that the vibration isolation ditch 1 can well block the propagation of vibration waves is exerted, the whole effect of the barrier formed by the pile foundations 3 of a plurality of rows is utilized in depth to isolate vibration, the problem that the required vibration isolation ditch 1 is too deep to cause difficulty in construction and maintenance is avoided, and a whole body formed by the two forms a complete vibration isolation barrier, so that a good vibration isolation effect can be obtained; and through setting up drain pipe 2, can sustainable pump drainage vibration isolation ditch 1 in the whole in-process of the construction of bottom pile foundation 3 and dynamic compaction reinforcement foundation construction, make vibration isolation ditch 1 be in empty ditch non-filling state continuously, ensured vibration isolation ditch 1's best vibration isolation effect.

The present utility model is not limited to the preferred embodiments, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model will still fall within the scope of the technical solution of the present utility model.

Claims (7)

1. A composite vibration isolation structure, comprising:

the vibration isolation ditch is arranged between the dynamic compaction vibration source and the building;

the pile foundations are arranged in a staggered manner and are vertically arranged in a stratum below the vibration isolation ditch;

the bottom end of the drain pipe is inserted into a stratum below the vibration isolation ditch, the top end of the drain pipe extends to the outer side of the vibration isolation ditch, and a drain hole is formed in the part of the drain pipe located in the stratum.

2. The composite vibration isolation structure according to claim 1, wherein the portion of the drain pipe located in the ground is filled with graded crushed stone and nylon mesh is wound on the outside.

3. The composite vibration isolation structure according to claim 1, wherein the number of the drainage pipes is two, and the two drainage pipes are respectively arranged at two ends of the vibration isolation trench.

4. The composite vibration isolation structure according to claim 1, wherein the pile foundation is a prestressed concrete pipe pile, and a pile tip is arranged at the bottom of the pile foundation.

5. The composite vibration isolation structure of claim 1, wherein the vibration isolation trench has an inverted trapezoidal cross section.

6. The composite vibration isolation structure according to claim 5, wherein the bottom width of the vibration isolation trench is 0.8m-1.4m, and the top width of the vibration isolation trench is greater than the bottom width thereof by more than 0.5 m.

7. The composite vibration isolation structure according to claim 5, wherein the depth of the vibration isolation trench is 2m-4m.