CN205636830U - Take light -duty well point and vibration prevention plate's damping trench - Google Patents

Abstract

The utility model discloses a take light -duty well point and vibration prevention plate's damping trench, it includes round fender pile (1) and round top beam (2), this circle fender pile (1) outside is equipped with the light -duty well point of round (3), top beam (2) elevation department establishes support (4) in the top, every row of inboard along fender pile (1) that length direction extends is connected with marginal vibration prevention plate (6), damping trench from the ditch at the bottom of up the successive layer interval lay coarse sand layer (5) and fine coal grieshoch (7), coarse sand layer (5) and fine coal grieshoch (7) that laid at the interval constitute the shock attenuation grained layer jointly, bury middle vibration prevention plate (8) of the different floor heights of multirow in the shock attenuation grained layer underground, damping trench's length direction extension is followed to every row a plurality of middle vibration prevention plate (8). This damping trench can avoid the interior ponding of ditch, can increase substantially the degree of depth, make shock attenuation and shock insulation effect ideal.

Description

Shock Absorbing Ditch with Lightweight Well Points and Shock Plates

technical field

The utility model relates to the shockproof field of rock and soil construction, in particular to a shock-absorbing ditch with light well points and shock-proof plates for separating the construction site from the surrounding environment during pile foundation construction to realize shock-absorbing or shock-proof functions.

Background technique

During pile foundation construction, vibrations are unavoidable during the process of compacting soil, crushing rock formations with impact hammers, and driving cranes and concrete tank trucks on the construction ground. This vibration will spread from the construction site to the surrounding environment, loosen the surrounding soil, and cause uneven settlement of the surrounding soil. This uneven settlement will cause the surrounding buildings to incline, or cause the underground pipelines buried in the surrounding soil to undergo rigid fracture and damage, which will affect the normal use of the surrounding pipelines and surrounding buildings. Moreover, the joints of the underground pipelines of some major projects such as gas pipelines are glued together. Vibration will loosen the joints of the above-mentioned pipelines, causing pipeline leakage, making the pipelines unable to be used normally, and polluting the environment. Security risks.

In order to reduce the impact of the vibration generated by pile foundation construction on surrounding buildings and pipelines, a shock-absorbing ditch of a certain depth and a certain width is generally set between the construction site and the surrounding protected targets. The conventional method is to drill two rows of steel sheet piles, and then hollow out a certain depth in the middle; or only drill a row of steel sheet piles, dig trenches and fill sand; The ditch is not even filled with sand.

The shock-absorbing ditch of the above-mentioned prior art has the following disadvantages: one is that water is easy to accumulate in the ditch, and the longitudinal wave generated by the vibration can be transmitted through the liquid, and naturally the effect of shock absorption or shock isolation cannot be achieved after the ditch accumulates water; The above-mentioned shock-absorbing ditch has no internal support system, and if it is dug too deep, it may cause collapse. However, if the effect of shock-absorbing or shock-isolation is to be achieved, the depth of the ditch is often required to be more than twice the depth of the object to be protected. The depth of the ditch is limited, which objectively fails to meet the requirements of shock absorption and isolation; third, the internal structure of the above-mentioned shock absorption ditch is too simple, only a groove is hollowed out, and the air or sand filling in the groove is used for shock absorption, while the longitudinal wave energy of vibration Transmission through gas, liquid and solid, so the effect of the shock-absorbing trench in the prior art is not obvious, and the shock-absorbing effect is not ideal.

Utility model content

The technical problem to be solved by the utility model is to provide a shock-absorbing ditch with light well points and shock-proof plates that can avoid water accumulation in the ditch, greatly increase the depth, and achieve ideal shock-absorbing and shock-isolation effects.

The technical solution of the utility model is to provide a shock-absorbing ditch with a light well point and a shock-proof plate, which includes a ring of support piles and a ring of top beams that connect each support pile into a whole. The piles include two rows of support piles extending along the length direction of the shock-absorbing trench and two rows of support piles extending along the width direction of the shock-absorbing trench;

There is a circle of light well points on the outside of the ring supporting piles, the bottom elevation of the light well points is more than 1 meter lower than the bottom elevation of the shock absorbing ditch, and the distance between every two adjacent light well points in this circle is 2 ~3 meters,

A top inner support extending along the width direction of the shock-absorbing ditch shall be provided at intervals of 4 to 6 meters at the elevation of the top beam;

The inner side of each row of support piles extending along the length direction is connected with at least one layer of edge shockproof boards through expansion screws;

The shock-absorbing ditch is laid with coarse sand and fly ash layers at intervals from the bottom of the ditch to the top. The coarse sand and fly ash layers laid at intervals together form a shock-absorbing granular layer. The top elevation of the shock-absorbing granular layer does not exceed the shock-absorbing half the depth of the trench;

Multiple rows of intermediate anti-vibration plates with different heights are buried in the shock-absorbing granular layer, and each row of multiple intermediate anti-vibration plates extends along the length direction of the shock-absorbing ditch, and each intermediate anti-vibration plate is provided with a horizontal bottom plate, and the horizontal bottom plate and the middle edge Between the two surfaces of the board there is a reinforcing brace.

The method of constructing the damping ditch of the utility model is as follows: first construct a circle of supporting piles in the form of bored piles along the outline of the damping ditch, the depth of the supporting piles will exceed the depth of the light well point drilled in the later stage, and then On the top of the supporting piles, a ring of supporting beams is constructed to connect the supporting piles into a whole circle, and then the top inner support is poured at the elevation of the supporting beams, and then a ring of supporting piles is formed on the outside of the shock-absorbing ditch outline A circle of light well points will be constructed on the outer side of the well. The bottom elevation of light well points is more than 1 meter lower than that of the shock absorbing ditch. The horizontal spacing of light well points is 2-3 meters. Submersible pumps are placed in each light well point to The water in the light well point is pumped to the outside of the construction site; then continue to dig down to the level of the bottom of the ditch, and then use expansion screws to fix the edge shock-proof plate inside each row of support piles extending along the length of the shock-absorbing ditch, and place the bottom A row of intermediate anti-vibration boards is placed on the bottom of the ditch, and then the shock-absorbing granular layer is buried from the bottom of the ditch upwards. After the filling height of the shock-absorbing granular layer exceeds the top of the middle anti-vibration board, the upper middle anti-vibration board is placed. Continue to fill the shock-absorbing granular layer until the shock-absorbing granular layer reaches the height of half the depth of the shock-absorbing ditch. Lay one deck of fly ash layer again, and lay one deck of coarse sand layer again, repeat like this, always go up to the elevation place of the half depth of shock-absorbing ditch, of course, also can lay the fly ash layer at first.

Compared with the prior art, the damping ditch with the light well point and the shockproof plate adopting the above structure has the following advantages.

1. A circle of light well points is laid on the outside of the shock absorbing ditch. The light well points have the effect of stopping water, so that the water flowing from the outside of the shock absorbing ditch to the shock absorbing ditch is cut off. The water inside the shock ditch will quickly seep away from the bottom of the ditch, which avoids water accumulation in the shock absorption ditch and blocks the longitudinal wave of vibration from propagating outward through the accumulated water in the shock absorption ditch, thereby improving the shock absorption and isolation effect ; Two, each support pile, pressure beam and top inner support of the shock-absorbing ditch constitute an integral support system, which can effectively support the lateral pressure of the soil and avoid collapse, so its depth can be large The amplitude is increased to ensure that the depth of the shock-absorbing ditch reaches more than twice the depth of the protected object such as the underground foundation of the building and the underground pipeline, which further ensures the shock-absorbing and shock-isolation effect of the protected object; 3. The length of each row The inner sides of the support piles arranged in the same direction are fixed with one to two layers of edge shockproof plates. The edge shockproof plates reflect the longitudinal waves of vibration, reducing the longitudinal waves propagating to the protected target, and further strengthening the effect of shock absorption and shock isolation. ; 4. The coarse sand layer and fly ash layer laid alternately in the shock absorption ditch can absorb, eliminate, weaken and block the vibration transmitted from the construction site, further reducing the vibration transmitted to the protected target. The effect of shock absorption and shock isolation is further improved; moreover, the above-mentioned coarse sand layer and fly ash layer can also play a certain role in supporting the support piles on both sides, and can resist the lateral pressure of the soil on both sides, so After laying the fly ash and coarse sand layer, the process of pouring the internal support at the middle elevation of the support pile can be omitted, so that the excavation process can be dug to the bottom at one time, which facilitates the construction process; moreover, the fly ash layer arranged at intervals above The height of the coarse sand layer and the coarse sand layer shall not exceed half of the depth of the shock absorbing ditch. This design is to prevent the fly ash layer and the coarse sand layer from being too thick and compacted by the excessive self-weight of the upper part, so as to ensure the effect of shock absorption and shock isolation; Moreover, the materials of the fly ash layer and the coarse sand are cheap and the cost is low; 5. After the pile foundation construction is completed, the edge shockproof plates above the height of the fly ash layer and the coarse sand layer can be recovered for subsequent recycling, reducing costs, Good economy; 6. There is an intermediate shockproof plate in the center of the width of the shock absorption ditch, which also has a reflection effect on the longitudinal wave of vibration, which also reduces the longitudinal wave propagating to the protected target, and further strengthens the effect of shock absorption and shock isolation. Moreover, a central anti-vibration plate in the middle and two edge anti-vibration plates on both sides together constitute an integral triple reflection, which has remarkable shock absorption and isolation effects; In this way, it has strong versatility and can be freely assembled and arranged according to the depth and length of the shock-absorbing groove to meet the needs of different sizes of shock-absorbing grooves, and as long as the middle shock-proof plate is placed horizontally, and then During the process of burying the fly ash layer and the coarse sand layer, the above-mentioned shock-absorbing particles will naturally press the bottom plate of the middle shock-proof plate during the landfill process, so as to avoid the instability and tilt of the middle shock-proof plate, that is to say, the middle shock-proof plate The reasonable design of the bottom plate structure of the plate makes the fixing of the middle anti-vibration plate integrated with the landfill process of the shock-absorbing granular layer, making the installation process convenient and quick.

Description of drawings

Fig. 1 is the top view structure diagram of the shock-absorbing ditch with light well point and shock-proof plate of the utility model.

Fig. 2 is a side sectional structural schematic diagram of a shock-absorbing ditch with a light well point and a shock-proof plate of the utility model.

As shown in the figure 1. Supporting pile, 2. Top beam, 3. Light well point, 4. Top inner support, 5. Coarse sand layer, 6. Edge shockproof plate, 7. Fly ash layer, 8. Middle shockproof Plate, 9, horizontal base plate, 10, reinforced diagonal bracing.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in Fig. 1 and Fig. 2, the utility model has a light-duty well point and a shock-absorbing ditch with shock-proof plates, which includes a circle of support piles 1 and pouring on the top of each support pile 1 to connect each support pile 1 into a A whole circle of pressure beam 2. The support pile 1 generally adopts the bored cast-in-place pile. The ring support piles 1 include two rows of support piles 1 extending along the length direction of the shock absorbing ditch and two rows of support piles 1 extending along the width direction of the shock absorbing ditch; the above four rows of support piles 1 are connected end to end in a circle, Constitutes the profile of the damping ditch.

There is a circle of light well points 3 on the outer side of the ring support pile 1, and the bottom elevation of the light well points 3 is more than 1 meter lower than the bottom elevation of the shock absorbing ditch. The distance between them is 2 to 3 meters. The light well point 3 is a kind of equipment for artificially lowering the groundwater level. It is to sink the well pipe with a thinner diameter into the aquifer below the bottom of the shock ditch along the periphery of the shock absorption ditch. The upper part of the well pipe and the water pump Connected, the groundwater is continuously pumped out from the well pipe through the water pump, so that the original groundwater level is lowered below the bottom of the shock-absorbing ditch. The depth of support pile 1 will exceed the depth of light well point 3.

A top inner support 4 extending along the width direction of the shock-absorbing ditch is provided at intervals of 4-6 meters at the elevation of the top-pressing beam 2.

The inner side of each row of support piles 1 extending in the length direction is connected with at least one layer of edge shockproof plate 6 through expansion screws; There are one to two layers of edge shockproof boards 6, and one to two layers of edge shockproof boards 6 are screwed on the left side of a row of support piles 1 extending along the length direction of the shock absorbing ditch on the right, and the thickness of each layer of edge shockproof boards 6 is 5 to 10 cm. .

The shock-absorbing ditch is laid with coarse sand layer 5 and fly ash layer 7 at intervals from the bottom of the ditch to the top. The coarse sand layer 5 and fly ash layer 7 laid at intervals together constitute the shock-absorbing granular layer. The top elevation of the shock-absorbing granular layer is No more than half of the depth of the damping groove. That is to say, if the depth of the shock-absorbing ditch is 6 meters, the height difference between the top elevation of the shock-absorbing granular layer and the bottom of the shock-absorbing ditch shall not exceed 3m.

There are several rows of intermediate anti-vibration plates 8 with different heights embedded in the shock-absorbing granular layer, and each row is composed of multiple intermediate anti-vibration plates 8 connected end to end, and each row of multiple intermediate anti-vibration plates 8 extends along the length direction of the anti-vibration ditch . The above-mentioned middle anti-vibration plate 8 is located in the middle of the width of the shock-absorbing groove. Each middle anti-vibration plate 8 is provided with a horizontal bottom plate 9 , and a reinforcing diagonal brace 10 is arranged between the horizontal bottom plate 9 and the two surfaces of the middle anti-vibration plate 8 .

Claims (1)

1. a band light well point and the Damping ditch of shockproof plate, it is characterised in that: it includes a circle support pile (1) and incites somebody to action Each support pile (1) connects into circle capping beam (2) of entirety, and this circle support pile (1) includes that two rows are along Damping ditch length The support pile (1) that the support pile (1) of direction extension and two rows extend along Damping ditch width；

This circle support pile (1) outside is provided with a circle light well point (3), and the end absolute altitude of light well point (3) is than Damping ditch Bottom of trench absolute altitude is low more than 1 meter, and the spacing between the light well point (3) that each two of this circle is adjacent is 2～3 meters；

Set, at interval of 4～6 meters, the top inner support (4) extended together along Damping ditch width at capping beam (2) absolute altitude；

The inner side expanded screw connection often arranging the support pile (1) extended along its length has the shockproof plate at least one of which edge (6)；

Damping ditch is the most successively spaced laying coarse sands layer (5) and Flyash Layer (7), the coarse sands layer (5) that interval is laid from bottom of trench Collectively forming damping granular layer with Flyash Layer (7), the top mark height of damping granular layer is less than the half of the Damping ditch degree of depth；

Damping granular layer is embedded with the shockproof plate in the centre (8) of multiple rows of different floor height, the shockproof plate in the multiple centres (8) often arranged Length direction along Damping ditch extends, and the shockproof plate in each centre (8) is provided with horizonal base plate (9), horizonal base plate (9) with It is provided with reinforcing diagonal brace (10) between two surfaces of middle shockproof plate (8).