CN217203998U - Drainage system for preloading treatment - Google Patents

Abstract

The utility model discloses a drainage system for preloading treatment, which comprises a sand layer, a plurality of drainage plates, a fill layer, a drainage well, a drainage pipe and a pumping device; the sand layer is laid on the upper part of a soft soil base layer of an area to be treated, and a plurality of drainage blind ditches are arranged inside the sand layer; the filling soil layer is laid on the upper part of the sand layer; the drainage plate is inserted into the soft soil base layer and the sand layer and communicated with the drainage blind ditch; the bottom of the drainage well is positioned in the soft soil foundation layer, the top of the drainage well extends upwards to the upper part of the filling layer, and the drainage well is communicated with the drainage blind ditch; the water inlet end of the drain pipe is arranged in the drain well, the water discharging end of the drain pipe is positioned on the outer side of the region, and the drain pipe is communicated with the water pumping device. According to the utility model discloses a drainage system for surcharge preloading is handled can discharge the intraformational hole water of soft soil matrix fast, effectively.

Description

Drainage system for preloading treatment

Technical Field

The utility model belongs to the technical field of the ground processing technique and specifically relates to a drainage system for surcharge pre-compaction is handled is related to.

Background

The preloading method is one of drainage consolidation methods, and is one of the commonly used treatment methods for soft soil foundations.

The preloading treatment mainly comprises a preloading part and a drainage system. The preloading can be earthwork loading, water body loading, precipitation loading and the like, the loading part is simple and easy to construct, and the quality control is simple. The drainage system comprises a vertical drainage body and a horizontal drainage system, wherein the vertical drainage body can adopt a sand well, a bagged sand well, a plastic drainage plate and the like, and the vertical drainage body is easy to treat; the horizontal drainage system is the key to the rapid drainage of pore water in the foundation.

At present, most of horizontal drainage systems for preloading treatment adopt a horizontal medium-coarse sand layer to collect water, and drain the water into peripheral drainage ditches by means of gravity. However, since the preloading treatment mostly has the action of uniformly distributing loads in a rectangular area, the additional stress of the foundation is maximum at the central point at the same depth in the foundation, and the additional stress is smaller as the distance from the central line is farther, namely, the settlement at the middle position in the treatment area is large and gradually becomes smaller toward the treatment boundary; therefore, the sedimentation amount of the preloading treatment area is in a pot bottom shape, the middle is large, the periphery is small, the middle of the horizontal coarse sand layer sinks along with the sedimentation, the drainage efficiency that the horizontal coarse sand layer is drained into the peripheral drainage ditches by gravity is reduced without utilizing the drainage towards the periphery, and the foundation treatment effect is influenced and the treatment period is prolonged. Meanwhile, when the treatment area is large, the transverse drainage path is too long, so that the soil body pore water is not beneficial to being quickly drained in time, the foundation treatment effect is influenced, and the treatment period is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a drainage system for surcharge carries pre-compaction and handles can discharge the pore water in the ground fast effectively.

According to the utility model discloses a drainage system for piling carry pre-compaction is handled, include: the sand layer is laid on the upper part of a soft soil base layer of an area to be treated, and a plurality of drainage blind ditches are arranged inside the sand layer; the filling layer is laid on the upper part of the sand layer; the drainage plates are inserted into the soft soil base layer and the sand layer and communicated with the drainage blind ditches; the bottom of the drainage well is positioned in the soft soil foundation layer, the top of the drainage well extends upwards to the position above the fill layer, and the drainage well is communicated with the drainage blind ditch; the water inlet end of the water discharging pipe is arranged in the water discharging well, and the water discharging end of the water discharging pipe is positioned outside the area; and the water pumping device is communicated with the water drainage pipe.

According to the utility model discloses a drainage system for piling carry pre-compaction is handled has following beneficial effect at least: by arranging the drainage blind ditches and the drainage wells in the sand layer, part of pore water in the soft soil foundation can be drained to the periphery by gravity through the sand layer, and the other part of pore water can enter the drainage wells through the drainage blind ditches and then is drained outwards through the water pumping device; through such setting, can discharge the pore water in the soft soil basal layer fast, effectively, both solved when handling the local too big effectively, the problem that the drainage efficiency is low that horizontal drainage route overlength leads to has also been solved effectively because the intermediate position in processing region is different with the subsidence all around, and the problem that influences the drainage effect.

According to the utility model discloses a some embodiments still include multichannel drainage open drain, multichannel the drainage open drain set up in regional outside, just the sand bed reaches the drainage french drain all with the top of drainage open drain is linked together.

According to some embodiments of the invention, the drainage well comprises: the water filtering well body is positioned inside and below the sand layer and communicated with the drainage blind ditch; and the reinforced concrete well body is arranged at the upper part of the water filtering well body and is communicated with the water filtering well body, and the top of the reinforced concrete well body is positioned above the filling layer.

According to the utility model discloses a some embodiments, the drainage well body includes the steel reinforcement cage body and lays in proper order from inside to outside steel wire net and the geotechnological cloth of the external portion of steel reinforcement cage.

According to some embodiments of the utility model, multichannel drainage french drain be horizontal and vertical staggered distribution in inside the sand bed, drainage well position in vertical drainage french drain and horizontal the crosspoint of drainage french drain, perhaps, drainage well position in on the regional central line.

According to some embodiments of the utility model, still include rubble inverted filter, rubble inverted filter locates the periphery and the bottom of drainage well body.

According to the utility model discloses a some embodiments, what the rubble inverted filter adopted is the graded rubble, just the particle diameter of graded rubble is crescent from outside to inside.

According to some embodiments of the invention, the drain pipe comprises: a drainage riser fixed inside the drainage well; and the drainage hose is respectively communicated with the vertical drainage pipe and the water pumping device, the drainage end of the drainage hose is positioned outside the region, and the drainage end of the drainage hose is lower than the bottom of the vertical drainage pipe.

According to some embodiments of the utility model, the drainage riser is fixed in through the clamp inside the drainage well.

According to some embodiments of the utility model, the sand bed is well coarse sand layer, the drain bar is plastics drain bar.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a drainage system for preloading treatment according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a sand layer, a soil filling layer, a gravel reverse filtering layer and a drainage well according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a water filtering well body according to an embodiment of the present invention;

reference numerals:

the drainage system comprises a soft soil base layer 100, a sand layer 200, a drainage plate 300, a drainage blind ditch 400, a filling layer 500, a drainage well 600, a drainage well body 610, a reinforced cage body 611, a steel wire mesh 612, geotextile 613, angle steel 614, flat steel 615, a reinforced concrete well body 620, a drainage pipe 700, a drainage riser pipe 710, a drainage hose 720, a hoop 730, a drainage open ditch 800, a gravel reverse filter layer 900 and a drainage channel 1000.

Detailed Description

This section will describe in detail the embodiments of the present invention, the preferred embodiments of which are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can visually and vividly understand each technical feature and the whole technical solution of the present invention, but it cannot be understood as a limitation to the scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, a drainage system for preloading according to an embodiment of the present invention includes a sand layer 200, a plurality of drainage plates 300, a fill layer 500, a drainage well 600, a drainage pipe 700, and a pumping device (not shown); wherein, the sand layer 200 is laid on the upper part of the soft soil base layer 100 of the area to be treated, and a plurality of drainage blind ditches 400 are arranged inside the sand layer 200; the filling layer 500 is laid on the upper part of the sand layer 200; the drainage plate 300 is inserted into the soft soil base layer 100 and the sand layer 200, and the drainage plate 300 is communicated with the drainage blind ditch 400; the bottom of the drainage well 600 is positioned in the soft soil base 100, the top of the drainage well 600 extends upwards to the upper part of the fill layer 500, and the drainage well 600 is communicated with the drainage blind ditch 400; the water inlet end of the water discharge pipe 700 is arranged inside the water discharge well 600, the water discharge end of the water discharge pipe 700 is positioned outside the area, and the water discharge pipe 700 is communicated with the water pumping device.

Wherein, pumping device can adopt water pump etc. and coarse sand layer in the sand bed 200 can adopt, and drain bar 300 can adopt plastics drain bar, and plastics drain bar has that the quality index is stable, the transportation is convenient, the continuity is good, the construction is simple and convenient, advantage such as drainage speed is fast. The drain board 300 is vertically arranged in the soft soil base layer 100, and the top of the drain board 300 is reversely bent and buried in the sand layer 200. According to the length and the width of an actual processing area, a plurality of drainage blind ditches 400 are transversely and longitudinally arranged in a staggered manner in the sand layer 200, and the interval between every two adjacent drainage blind ditches 400 can be set to be about 30 meters, and of course, other values can also be set.

As shown in fig. 1 and 2, during surcharge preloading, pore water in the soft soil base layer 100 enters the sand layer 200 through the drainage plate 300, a part of the pore water is drained from the sand layer 200 to the periphery by gravity, a part of the pore water enters the drainage blind ditch 400, and the pore water passes through the drainage blind ditch 400 and enters the drainage well 600; the water pumping device then discharges the pore water collected by the drainage well 600 to the outside through the drainage pipe 700, and the pore water can be discharged to the nearby drainage channel 1000 or the low-lying pond and the like.

According to the utility model discloses a drainage system for piling and carrying pre-compaction is handled, through at the inside drainage french drain 400 that sets up of sand bed 200 and set up drainage well 600 for some can lean on gravity to discharge all around through sand bed 200 to the pore water in the soft soil basic unit 100, and partly can enter into in the drainage well 600, the outside discharge of rethread pumping device. Through such setting, can discharge the pore water in the soft soil basic unit 100 fast, effectively, both solved effectively when handling local too big, the problem that the drainage efficiency is low that horizontal drainage route overlength leads to has also solved effectively because the intermediate position of handling the region is different with the settlement volume all around, and the problem of influence drainage effect.

As shown in fig. 1, the drainage system for preloading processing according to the embodiment of the present invention further includes a multi-channel open drainage channel 800, the open drainage channel 800 is disposed outside the processing region, and the sand layer 200 and the drainage blind channel 400 are both communicated with the top of the open drainage channel 800.

During preloading, pore water in the soft soil base layer 100 enters the sand layer 200 through the drainage plate 300, one part of the pore water is discharged to the drainage open ditch 800 from the sand layer 200 to the periphery by gravity, one part of the pore water enters the drainage blind ditch 400 and then is divided into two parts, one part of the pore water is discharged to the drainage open ditch 800 through the drainage blind ditch 400, and the other part of the pore water enters the drainage well 600 through the drainage blind ditch 400. Through the mutual cooperation of sand bed 200, drain bar 300, drainage french drain 400, drainage well 600 and open drain 800, form complete effectual drainage system, can discharge the pore water fast effectively.

As shown in fig. 1 and 2, in some embodiments of the present invention, drainage well 600 includes a drainage well body 610 and a reinforced concrete well body 620. The water filtering well body 610 is positioned in the sand layer 200 and at the lower part of the sand layer, and the water filtering well body 610 is communicated with the drainage blind ditch 400; the reinforced concrete well body 620 is arranged at the upper part of the water filtering well body 610 and is communicated with the water filtering well body 610, and the top of the reinforced concrete well body 620 is positioned above the soil filling layer 500.

By arranging the drainage well body 610 in and below the sand layer 200, on one hand, pore water conveyed by the sand layer 200 and the drainage blind ditch 400 can be collected conveniently, and on the other hand, the drainage well body plays a role in soil filtration. After the drainage well body 610 is arranged, filling soil is loaded on the upper part of the sand layer 200 in a grading mode according to a loading plan of design requirements to form a soil filling layer 500, and meanwhile, a reinforced concrete well body 620 is arranged on the upper part of the drainage well body 610 to be heightened synchronously in the grading soil filling mode. The reinforced concrete well body 620 mainly plays a role in containment and is convenient to construct and disassemble. According to the utility model discloses drainage well 600 adopts prefabricated drainage well body 610 and the reinforced concrete well body 620, is convenient for be under construction and dismantles, but reuse, and cost is practiced thrift in green.

Further, as shown in fig. 3, in some embodiments of the present invention, the drainage well 610 includes a reinforcement cage 611, and a steel wire mesh 612 and a geotextile 613 sequentially laid outside the reinforcement cage 611 from inside to outside. The reinforcement cage body 611 can be welded by adopting threaded reinforcements to form a framework, meanwhile, flat steel 615 is adopted in the middle of the framework, and angle steel 614 is adopted at the upper part and the lower part of the framework for reinforcement, so that the reinforcement cage can bear external soil pressure and is free from large deformation; meanwhile, the steel wire mesh 612 and the geotextile 613 are arranged outside the reinforcement cage body 611 from inside to outside to achieve the effects of water and soil filtration, so that pore water can smoothly permeate, and soil particles are blocked outside the geotextile 613.

In order to effectively avoid the problem that the settling amount of the middle and the periphery of the treatment area is different from each other, which affects the drainage effect, the drainage well 610 may be disposed on the center line of the treatment area, that is, near the center of the treatment area, or the drainage well 610 may be disposed at the intersection of the horizontal and vertical drainage gutters 400.

As shown in fig. 1 and 2, in some embodiments of the present invention, a gravel filtering layer 900 is further included, and the gravel filtering layer 900 is disposed at the periphery and the bottom of the drainage well 610. The gravel reverse filter 900 is a transition structure around and below the water filtering well body 610, and plays a role of filtering soil. Wherein, the gravel reverse filtering layer 900 can adopt graded gravel, and the grain size of the graded gravel is gradually increased from outside to inside. Through such setting, when satisfying the function of permeating water, can also play and strain soil, prevent that the soil body from taking place the effect that the infiltration warp.

As shown in fig. 2, in some embodiments of the present invention, the drainage pipe 700 includes a drainage pipe riser 710 and a drainage hose 720, the drainage pipe riser 710 can be fixed in the drainage well 600 by a clamp 730 or other fixing means, and the drainage hose 720 with the same inner diameter is connected to the drainage pipe riser 710, and the drainage end of the drainage hose 720 is extended to the outside of the treatment area, and can be connected to a nearby drainage channel 1000 or a low-lying pond, etc. to ensure that the drainage end of the drainage hose 720 is lower than the bottom of the drainage pipe riser 710. Like this when pumping device with the air discharge back in the drainage hose 720, alright utilize the siphon effect, with the unpowered quick discharge of the pore water of collecting in the drainage well 600, green practices thrift the cost.

The specific application of the drainage system for preloading according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 3 as a specific embodiment, it should be understood that the following description is only illustrative and not restrictive.

As shown in fig. 1 to 3, firstly, leveling a pre-treated area, and then laying a sand layer 200 on the upper part of the area, wherein the sand layer 200 can be a medium-coarse sand layer; then, a drainage plate 300 is arranged downwards from the top of the sand layer 200, the drainage plate 300 can be a plastic drainage plate, the drainage plate 300 is driven into the soft soil base layer 100 to be treated, the driving depth is basically the same as the treatment depth, and the top of the drainage plate 300 is reversely bent and buried in the sand layer 200; in combination with the length and width of the treatment area, a plurality of drainage blind ditches 400 are arranged in the sand layer 200, wherein the drainage blind ditches 400 can be distributed in a transverse and longitudinal staggered manner; meanwhile, a drainage open trench 800 may be excavated outside the treatment area; then, arranging a water filtering well body 610 on the cross point of the transverse and longitudinal drainage blind ditch 400 or the central line of a treatment area, wherein the water filtering well body 610 extends about 50cm deep into the lower part of the sand layer 200 or has other values, and arranging gravel reverse filtering layers 900 at the periphery and the bottom of the water filtering well body 610; then, carrying out layered filling loading on the upper part of the sand layer 200 according to a loading plan to form a filling layer 500, synchronously heightening the upper part of the water filtering well body 610 by adopting a reinforced concrete well body 620 while carrying out graded filling, arranging a drainage vertical pipe 710 in the drainage well 600, and fixing the drainage vertical pipe 710 by adopting a hoop 730 or other modes; the drainage hose 720 with the same inner diameter is connected with the drainage vertical pipe 710, and the drainage end of the drainage hose 720 is extended to the outside of the treatment area, so that the drainage hose can be connected to the nearby drainage channel 1000 or low-lying ditches and ponds, and the drainage end of the drainage hose 720 is ensured to be lower than the bottom of the drainage vertical pipe 710.

Through the arrangement, during preloading, pore water/underground water in the soft soil base layer 100 can enter the sand layer 200 through the drainage plate 300, part of water is drained to the external open drain 800 through the sand layer 200 by gravity, part of water enters the blind drain 400, water inside the blind drain 400 is divided into two parts, one part of water is drained to the open drain 800 through the blind drain 400, the other part of water enters the drainage well 600 through the blind drain 400, and after the water pumping device discharges air in the drainage hose 720, the pore water collected in the drainage well 600 can be quickly discharged without power by utilizing the siphon effect.

The utility model discloses following beneficial effect has at least:

(1) the drainage well 600 is arranged in the treatment area and is positioned at a position with a larger sedimentation value, so that the pore water of the foundation can conveniently flow into the drainage well 600 through the sand layer 200 and the drainage blind ditch 400, the drainage is timely and effective, and the problem that the drainage effect is influenced because the sedimentation amount at the middle position and around the treatment area is different is effectively solved;

(2) the drainage wells 600 are arranged in combination with the treatment area, so that the problem of low drainage efficiency caused by long transverse drainage path when the treatment area is large can be solved, and drainage is timely and effective;

(3) by arranging the drainage vertical pipe 710 and the drainage hose 720, the underground water collected in the well can be quickly drained without power by means of siphon effect, so that the method is green and environment-friendly and saves the manufacturing cost;

(4) drainage well 600 adopts prefabricated reinforced concrete well body 620 and drainage well body 610, and the construction and the dismantlement of being convenient for, but reuse, green practices thrift the cost.

In the description of the present specification, references to "one embodiment," "a further embodiment," "some specific embodiments," or "some examples" or the like are intended to mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A drainage system for a surcharge pre-compaction process, comprising:

the sand layer is laid on the upper part of the soft soil base layer of the area to be treated, and a plurality of drainage blind ditches are arranged inside the sand layer;

the filling layer is laid on the upper part of the sand layer;

the drainage plates are inserted into the soft soil base layer and the sand layer and communicated with the drainage blind ditches;

the bottom of the drainage well is positioned in the soft soil foundation layer, the top of the drainage well extends upwards to the position above the filling layer, and the drainage well is communicated with the drainage blind ditch;

the water inlet end of the water discharging pipe is arranged in the water discharging well, and the water discharging end of the water discharging pipe is positioned outside the area;

and the water pumping device is communicated with the drain pipe.

2. The drainage system for preloading treatment according to claim 1, further comprising a plurality of open drainage ditches, wherein the open drainage ditches are arranged outside the region, and the sand layer and the blind drainage ditches are communicated with the top of the open drainage ditches.

3. The drainage system for surcharge pre-compaction treatment according to claim 1, wherein the drainage well comprises:

the water filtering well body is positioned inside and below the sand layer and communicated with the drainage blind ditch;

and the reinforced concrete well body is arranged at the upper part of the water filtering well body and is communicated with the water filtering well body, and the top of the reinforced concrete well body is positioned above the soil filling layer.

4. The drainage system for preloading treatment according to claim 3, wherein the drainage well body comprises a reinforcement cage body, and a steel wire mesh and a geotextile which are sequentially laid outside the reinforcement cage body from inside to outside.

5. The drainage system for preloading treatment according to claim 3 or 4, wherein a plurality of drainage blind ditches are transversely and longitudinally distributed in the sand layer in a staggered manner, and the drainage well body is positioned at the intersection point of the longitudinal drainage blind ditches and the transverse drainage blind ditches, or is positioned on the central line of the area.

6. The drainage system for the preloading treatment according to claim 3 or 4, further comprising a gravel reverse filtering layer provided at the periphery and bottom of the drainage well body.

7. The drainage system for preloading treatment according to claim 6, wherein graded crushed stones are adopted as the crushed stone reverse filtering layer, and the grain size of the graded crushed stones is gradually increased from outside to inside.

8. The drainage system for pre-compaction processing for a heap according to claim 1, wherein the drainage pipe comprises:

the drainage vertical pipe is fixed inside the drainage well;

and the drainage hose is respectively communicated with the vertical drainage pipe and the water pumping device, the drainage end of the drainage hose is positioned outside the region, and the drainage end of the drainage hose is lower than the bottom of the vertical drainage pipe.

9. The drainage system for surcharge pre-compaction treatment according to claim 8, wherein the drainage riser is fixed inside the drainage well by a clip.

10. The drainage system for the surcharge pre-press treatment according to claim 1, wherein the sand layer is a medium-coarse sand layer, and the drainage plate is a plastic drainage plate.

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