CN116005654A - Reinforced soil pile adopting foam polymer soil for pouring pile forming and construction method thereof - Google Patents

Abstract

The invention relates to the field of road construction, in particular to a reinforced soil pile formed by pouring foam polymer soil and a construction method thereof. The method for constructing the reinforced soil pile by adopting the foam polymer soil to fill the pile is used for road engineering and comprises the following steps: digging a hole-type filling space on a construction road section and collecting dug earthwork; preparing the excavated earthwork into foam polymer soil outside the filling space; the foam polymer soil is backfilled into the filling space and is cured to form the reinforced soil pile, so that the uniformity is easier to control in an external stirring operation mode to ensure the pile forming quality, and meanwhile, the soil pile made of the foam polymer soil has small dead weight, can reduce sedimentation, can recycle the excavated earthwork and reduce environmental damage caused by abandoning.

Description

Reinforced soil pile adopting foam polymer soil for pouring pile forming and construction method thereof

Technical Field

The invention relates to the field of road construction, in particular to a reinforced soil pile formed by pouring foam polymer soil and a construction method thereof.

Background

In the road construction process, in order to consolidate the foundation, a consolidated soil pile is generally pre-built below the foundation, but in the prior art, the consolidated soil pile is generally divided into a rigid pile and a flexible pile, wherein a typical representative in the field of the flexible pile is a stirring pile, the stirring pile is generally manufactured by rotating a hole on the ground by using a spiral drilling machine and drilling the hole to a bearing layer, then pumping raw materials into the hole by using a pipeline, and finally stirring the materials in the hole in a circulating lifting drilling mode to manufacture a pile body.

However, such stirring piles are difficult to control in uniformity of stirring because stirring is required in the holes, resulting in poor pile quality and even difficulty in pile formation.

Accordingly, the prior art is subject to improvement and development.

Disclosure of Invention

The invention aims to provide a reinforced soil pile which is formed by pouring foam polymer soil and a construction method thereof, wherein the reinforced soil pile is easier to control uniformity to ensure pile forming quality by external stirring, and meanwhile, the soil pile which is formed by adopting the foam polymer soil has small dead weight, can reduce sedimentation, can recycle excavated earthwork and reduces environmental damage caused by abandoning the earthwork.

In a first aspect, the present invention provides a method for constructing a reinforced soil pile by casting piles using foamed polymeric soil, for road engineering, the method comprising the steps of:

s1, digging a hole-type filling space on a construction road section and collecting dug earthwork;

s2, preparing the excavated earthwork into foam polymer soil outside the filling space;

s3, backfilling the foam polymer soil into the filling space, and curing to form the reinforced soil pile.

The excavated earthwork is taken as one of the raw materials to be put into an external stirring device for stirring and mixing to prepare foam polymer soil, and stirring in holes is not needed, so that piling is facilitated, and the pile quality is ensured.

Further, the specific steps in step S1 include:

s11, drilling a soil side from the ground by using a spiral drilling machine along the vertical direction and drilling the soil side to a soft soil layer so as to form the filling space on the ground.

The digging depth of the filling space is reduced, the difficulty of digging operation is reduced, and a large amount of cost is saved.

Further, before executing step S1, the method further includes the steps of:

s4, cleaning the surface of the construction road section.

The stability of the foundation is improved, and the paved road is prevented from being deformed or damaged.

Further, the specific steps in step S2 include:

s21, transferring the excavated earthwork into a stirring device and mixing the excavated earthwork with cementing materials and water to form cementing slurry;

s22, transferring the gelled slurry to foaming mixing equipment to prepare the foamed polymer soil.

Further, the cementing material comprises cement, mineral powder, white mud powder and desulfurized gypsum.

Further, the specific steps in step S3 include:

s31, backfilling the foam polymer soil into the filling space in a layered filling mode.

The reinforced soil pile is favorable for ensuring the consistency of the strength of the reinforced soil pile supported by the foam polymer soil and avoiding cracks caused by different local position strength.

Further, the specific steps in step S31 include:

s311, backfilling the foam polymer soil into the filling space, stopping backfilling when the backfilling height reaches 0.3-0.6 m, and continuing backfilling after waiting for a preset time until the backfilling height of the reinforced soil pile is reached.

Further, the cross section of the filling space is circular or polygonal.

Further, the pore diameter of the filling space with the circular cross section is 30-50cm, and the depth is 2-3 times of the pore diameter.

In a second aspect, the present invention provides a reinforced earth pile for road engineering using foamed polymeric soil cast-in-place piles prepared by a method of constructing a reinforced earth pile using foamed polymeric soil cast-in-place piles as described in any of the first aspects above.

From the above, the invention has the following beneficial effects:

1. the excavated earthwork is mixed with other raw materials outside the filling space to prepare foam polymer soil, so that the uniformity of stirring can be controlled more easily, piles can be formed more easily after backfilling, and the pile quality can be ensured;

2. the reinforced soil pile made of foam polymer soil has small pile body self weight and does not have serious sedimentation when load is applied;

3. compared with the prior art that the excavated earthwork can only be discarded or carried away, the invention can recycle the excavated earthwork, thereby being beneficial to saving resources and protecting environment.

Drawings

Fig. 1 is a flowchart of a method for constructing a reinforced soil pile by casting piles with foamed polymer soil according to an embodiment of the present invention.

Fig. 2 is a schematic view of a reinforced soil pile formed by casting foam polymer soil on a foundation according to an embodiment of the present invention.

Fig. 3 is a schematic construction diagram of a reinforced soil pile constructed by pouring foam polymer soil into piles according to an embodiment of the present invention.

Description of the reference numerals:

100. a soft soil layer; 200. a bearing layer; 300. reinforced soil piles are cast into piles by adopting foam polymer soil; 400. roadbed; 500. a spiral drilling machine; 600. a conveyor belt; 700. a stirring device; 800. foaming mixing equipment; 900. filling the space.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention 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 invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

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 invention, the terms "first", "second", etc. are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features.

In a first aspect, referring to fig. 1, the present invention provides a method of constructing a reinforced soil pile using foamed polymeric soil poured into the pile, comprising the steps of:

s1, digging a hole-type filling space on a construction road section and collecting dug earthwork;

s2, preparing the excavated earthwork into foam polymer soil outside the filling space;

s3, backfilling the foam polymer soil into the filling space, and curing to form the reinforced soil pile.

In road construction engineering for reinforcing a foundation by adopting a stirring pile, a construction party generally digs a pile hole at a preset position on the ground, then stirs the cement mixture into the pile hole while stirring, and a reinforced soil pile is formed after curing.

In practical application, the earthwork excavated from the filling space can be directly used for manufacturing foam polymerized soil, then the foam polymerized soil is backfilled into the filling space, and a reinforced soil pile is formed after maintenance.

In addition, if pile forming quality of plain concrete piles needs to be ensured, the cement mixture is always required to be stirred to ensure uniform mixing of raw materials, and pile forming quality can be ensured only if the raw materials are uniform enough, however, stirring of the mixture in pile holes is difficult and inconvenient on one hand, on the other hand, stirring speed, frequency and other parameters during stirring control are difficult to be greatly increased, so that stirring difficulty is greatly increased, and stirring uniformity is difficult to control (particularly, stirring in a silt layer is more difficult to form piles under a foundation with the silt layer).

When the foam polymer soil is manufactured in the embodiment, the mixture is stirred outside the filling space, the stirring is not needed while pouring, the stirring speed, the stirring frequency and other parameters are easier to regulate and control when the mixture is stirred outside, the stirring difficulty is greatly reduced, and the stirring uniformity is easier to control.

The curing includes natural curing, which means that the foamed polymer soil slurry is naturally hardened to form foamed polymer soil with certain strength by utilizing natural conditions, and the surface of the foamed polymer soil can be covered with proper materials and watered to keep proper temperature and humidity conditions required by hardening at certain time.

In certain embodiments, referring to fig. 2 and 3, the specific steps in step S1 include:

s11, drilling a soil side from the ground by using a spiral drilling machine along the vertical direction and drilling the soil side to a soft soil layer so as to form a filling space on the ground.

During actual construction, the filling space can be dug through a spiral drilling machine (the spiral drilling machine is not described in detail in the prior art), the reinforced soil pile made of foam polymer soil is lighter than a plain concrete pile in mass under the same volume, the self weight of the foundation can be effectively reduced, foundation settlement is reduced, and the composite foundation is facilitated to play a role.

In addition, referring to fig. 2, the general foundation includes a soft soil layer 100 and a bearing layer 200, wherein the soft soil layer 100 is an upper layer of the bearing layer 200, and most of the time, plain concrete piles are required to pass through the soft soil layer to reach the relatively hard bearing layer 200, so that the capability of bearing load of the plain concrete piles is ensured, and if the plain concrete piles only penetrate into the soft soil layer 100, the situation that heavy settlement occurs in the whole under the double influence of dead weight and load when the load is applied is caused;

in this embodiment, the reinforced soil pile 300 is formed by pouring foam polymer soil, and is lightweight, but can still effectively support the roadbed 400 under the same load but does not have serious settlement compared with a plain concrete pile although the reinforced soil pile is only penetrated into the soft soil layer 100 (used as a suspension pile), so that the excavation depth of a filling space is reduced, the difficulty of excavation operation is reduced, and a large amount of cost is saved.

In certain embodiments, the method further comprises the step of, prior to performing step S1:

s4, cleaning the surface of the construction road section.

The surface cleaning mainly cleans firewood and garbage in the soil on the surface of a construction road section, and cleans sundries such as cultivated soil which are not suitable for road filling, thereby being beneficial to increasing the stability of the foundation and avoiding the deformation or damage of paved roads.

In certain embodiments, the specific steps in step S2 include:

s21, transferring the excavated earthwork into a stirring device and mixing the excavated earthwork with cementing materials and water to form cementing slurry;

s22, transferring the gelled slurry to foaming mixing equipment to prepare foam polymer soil.

In the present embodiment, the stirring device may be a stirrer, a stirring station, or the like, but is not limited thereto.

When the method is practically applied, when a filling space is dug and set by using a spiral drilling machine, the dug earthwork can be brought out by rotating a drill bit of the spiral drilling machine, at the moment, the dug earthwork can be transported to a stirring device through a conveyor belt or a spiral conveyor, then cementing materials and water are added into the stirring device in proportion to be mixed to prepare cementing slurry, the prepared cementing slurry is conveyed to foaming mixing equipment through a pipeline, meanwhile, a foaming agent is also required to be put into the foaming mixing equipment by a constructor, the foaming agent is subjected to physical foaming through the foaming mixing equipment to form foam and then is fully mixed with the cementing slurry, the required foamed polymer soil is prepared after the foaming agent is fully mixed, and finally the prepared foamed polymer soil is backfilled into the filling space through a conveying pipeline, so that the reinforced soil pile is built.

Specifically, referring to fig. 2 and 3, after the auger 500 digs out the earth, the earth is transferred to the stirring device 700 by the conveyor 600, the gelled slurry produced by the stirring device 700 is transferred to the foaming mixing apparatus 800 by the pipeline, and the foamed polymer soil produced by the foaming mixing apparatus 800 is transferred to the filling space 900 by the pipeline (in actual construction, the pipeline may be directly extended into the filling space 900 to backfill the foamed polymer soil into the filling space 900, but the pipeline may affect the drilling of the auger 500, preferably, the auger 500 with the pipeline therein may be used, the auger 500 is capable of realizing the backfilling of the slurry while drilling the earth, and the auger 500 is not described in detail herein for the prior art), thereby constructing the reinforced soil pile 300 using the foamed polymer soil to fill the pile.

It should be noted that the foaming mixing apparatus may be a lightweight soil integrated preparation machine, a foamed lightweight soil preparation station and a foaming mixing pump truck (such as a slurry foaming mixing distributing rod pump truck) in the prior art, but is not limited thereto.

In certain embodiments, the cementitious material includes cement, mineral powder, white mud powder, and desulfurized gypsum.

Specifically, the mass sum of cement, mineral powder, white mud powder and desulfurized gypsum is 100 parts by weight, and under one of the proportions, 10 parts of cement, 40 parts of mineral powder, 38 parts of white mud powder and 12 parts of desulfurized gypsum are mixed; under the other proportion, cement accounting for 12 parts, mineral powder accounting for 38 parts, white mud powder accounting for 38 parts and desulfurized gypsum accounting for 12 parts; under the other proportion, 6 parts of cement, 44 parts of mineral powder, 28 parts of white mud powder and 22 parts of desulfurized gypsum; but not limited to this, the specific proportion can be adaptively adjusted according to actual conditions.

Further, for this kind of proportion of cement 10 parts, powdered ore 40 parts, white mud powder 38 parts, desulfurization gypsum 12 parts, still include:

the mass ratio of water to solid materials (including earthwork and cementing materials) is 1:1.02;

the mass ratio of the earthwork to the cementing material is 1:1;

the foaming agent is SRL0 foaming agent, and the composition of the foaming agent is as follows: 48wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 6wt% of sodium dodecyl sulfate, 22wt% of alpha-alkenyl sodium sulfonate, 5wt% of lauramidopropyl betaine and 19wt% of distilled water.

In actual construction, firstly stirring and mixing earthwork and water for 20min (80 r/min) according to a proportion, then adding a cementing material, stirring and mixing for 25min (80 r/min) to obtain gel slurry. Then 0.25 weight part of SRL0 foaming agent is diluted 75 times to obtain foaming agent solution, the prepared foaming agent solution is injected into a foaming mixing device, compressed air is introduced to perform physical foaming to obtain foam (the volume of the obtained foam can be kept stable for about 15 min when the foam is independently stored). Finally, adding the foam into the gel slurry, and continuously stirring and mixing for 12min (55 r/min) to obtain the required foam polymer soil.

Further, for the proportion of cement accounting for 12 parts, mineral powder accounting for 38 parts, white mud powder accounting for 38 parts and desulfurized gypsum accounting for 12 parts, the method further comprises the following steps:

the mass ratio of water to solid materials (including earthwork and cementing materials) is 1:1;

the mass ratio of the earthwork to the cementing material is 1.5:1;

the foaming agent is SRS1 foaming agent, and the composition of the foaming agent is as follows: 65wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 13wt% of triethanolamine, 9wt% of sodium dodecyl sulfate, 7wt% of diethanol monoisopropanolamine and 6wt% of lauramidopropyl betaine.

In actual construction, firstly stirring and mixing earthwork and water for 20min (80 r/min) according to a proportion, then adding a cementing material, stirring and mixing for 25min (80 r/min) to obtain gel slurry. Then 0.25 weight part of SRS1 foaming agent is diluted 75 times to obtain foaming agent solution, the prepared foaming agent solution is injected into a foaming mixing device, compressed air is introduced to perform physical foaming to obtain foam (the volume of the obtained foam can be kept stable for about 16 min when the foam is independently stored). Finally, adding the foam into the gel slurry, and continuously stirring and mixing for 12min (55 r/min) to obtain the required foam polymer soil.

Further, for the mixture ratio of 6 parts of cement, 44 parts of mineral powder, 28 parts of white mud powder and 22 parts of desulfurized gypsum, the method further comprises the following steps:

the mass ratio of water to solid materials (including earthwork and cementing materials) is 1:1.02;

the mass ratio of the earthwork to the cementing material is 1:1;

the foaming agent is SRS2 foaming agent, and the composition of the foaming agent is as follows: 39wt% of sodium fatty alcohol polyoxyethylene ether sulfate, 9wt% of triethanolamine, 5.5 wt% of sodium dodecyl sulfate, 3wt% of diethanol monoisopropanolamine, 24wt% of sodium alpha-alkenyl sulfonate, 17wt% of ethylene glycol butyl ether and 2.5wt% of 12-14 mixed alcohol (the weight ratio of the carbon dodecanol to the carbon tetradecanol is 7:3).

In actual construction, firstly stirring and mixing earthwork and water for 20min (80 r/min) according to a proportion, then adding a cementing material, stirring and mixing for 25min (80 r/min) to obtain gel slurry. Then diluting 0.25 weight part of SRN2 foaming agent by 85 times to obtain a foaming agent solution, injecting the prepared foaming agent solution into a foaming mixing device, and introducing compressed air to perform physical foaming to obtain foam (the volume of the obtained foam can be kept stable for about 16 min when the foam is stored independently). Finally, adding the foam into the gel slurry, and continuously stirring and mixing for 12min (55 r/min) to obtain the required foam polymer soil.

In some embodiments, the components of the cementing material are not limited to the cement, the mineral powder, the white mud powder and the desulfurized gypsum, and in practical application, industrial solid waste (such as phosphogypsum, red mud, alkaline residue, fly ash, steel slag, even construction waste and the like) can also be used for preparing the cementing slurry, so that a large amount of solid waste can be consumed to a great extent, and the cementing material has great significance in environmental protection and is beneficial to protecting the surrounding environment.

In certain embodiments, the specific steps in step S3 include:

s31, backfilling the foam polymer soil into the filling space in a layered filling mode.

Further, the specific steps in step S31 include:

s311, backfilling foam polymer soil into the filling space, stopping backfilling when the backfilling height reaches 0.3-0.6 m, and continuing backfilling after waiting for a preset time until the backfilling height of the reinforced soil pile is reached.

In the process of backfilling a single filling space by using foam polymer soil, after each backfill height reaches 0.3-0.6 m, the backfill is continued after waiting for a preset time until reaching the filling height required by the reinforced soil pile (but not limited to the preset time, the concrete backfill height can be adaptively adjusted according to practical conditions, the preset time can be 3-10 minutes, or the backfill is continued after the foam polymer soil which is backfilled last time is completely solidified), the consistency of the strength of the reinforced soil pile supported by the foam polymer soil is ensured by a layered filling mode, and cracks caused by different local position strengths (for example, the deeper positions bear larger foam polymer soil weight, so that the pressure is higher, air holes at the bottom position after solidification are more dense than those at the top position, so that the bottom position and the top position have larger strength difference), and the integrity of the reinforced soil pile is effectively maintained.

In some embodiments, the cross section of the filling space is circular or polygonal, and filling spaces with different shapes are dug to manufacture reinforced soil piles with different shapes, so that different construction requirements are met, and the construction requirements are specific.

In some embodiments, the filling space with a circular cross section has a pore diameter of 30-50cm and a depth of 2-3 times the pore diameter; the method meets the load requirements of common town roads and the drill bit specification of the spiral drilling machine, only needs deep digging to a soft soil layer, has high digging operation speed and short period, and can not generate serious sedimentation phenomenon.

In a second aspect, the present invention provides a reinforced earth pile formed by injection moulding of foamed polymeric soil, prepared by a method of constructing a reinforced earth pile formed by injection moulding of foamed polymeric soil as in any of the above embodiments. Compared with plain concrete piles with the same volume, the reinforced soil pile made of foam polymer soil has lighter weight, can greatly reduce sedimentation when bearing load, and has simple construction process, convenient operation and low cost.

In this document, relational terms such as first and second, and the like may be 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.

The above description is only an example of the present invention and is not intended to limit the scope of the present invention, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A method for constructing a reinforced soil pile by adopting foam polymer soil to fill a pile is used for road engineering and is characterized by comprising the following steps:

s1, digging a hole-type filling space on a construction road section and collecting dug earthwork;

s2, preparing the excavated earthwork into foam polymer soil outside the filling space;

s3, backfilling the foam polymer soil into the filling space, and curing to form the reinforced soil pile.

2. The method for constructing a reinforced soil pile by casting piles using foamed polymeric soil according to claim 1, wherein the specific steps of step S1 include:

s11, drilling a soil side from the ground by using a spiral drilling machine along the vertical direction and drilling the soil side to a soft soil layer so as to form the filling space on the ground.

3. The method for constructing a reinforced soil pile by casting piles using foamed polymeric soil according to claim 1, further comprising the step of, before performing the step S1:

s4, cleaning the surface of the construction road section.

4. The method for constructing a reinforced soil pile by casting piles using foamed polymeric soil according to claim 1, wherein the specific steps of step S2 include:

s21, transferring the excavated earthwork into a stirring device and mixing the excavated earthwork with cementing materials and water to form cementing slurry;

s22, transferring the gelled slurry to foaming mixing equipment to prepare the foamed polymer soil.

5. The method for constructing a reinforced soil pile by casting foam polymer soil into a pile according to claim 4, wherein the cementing material comprises cement, mineral powder, white mud powder and desulfurized gypsum.

6. The method for constructing a reinforced soil pile by casting piles using foamed polymeric soil according to claim 1, wherein the specific steps of step S3 include:

s31, backfilling the foam polymer soil into the filling space in a layered filling mode.

7. The method for constructing a reinforced soil pile by casting piles using foamed polymeric soil according to claim 6, wherein the specific steps of step S31 include:

s311, backfilling the foam polymer soil into the filling space, stopping backfilling when the backfilling height reaches 0.3-0.6 m, and continuing backfilling after waiting for a preset time until the backfilling height of the reinforced soil pile is reached.

8. The method for constructing a reinforced soil pile by casting piles using foamed polymer soil according to claim 1, wherein the cross section of the filling space is circular or polygonal.

9. The method for constructing reinforced soil piles using foamed polymeric soil cast-in-place piles according to claim 8, wherein the filling space having a circular cross section has a pore diameter of 30-50cm and a depth of 2-3 times the pore diameter.

10. Reinforced earth pile for road engineering using foamed polymeric soil cast-in-place piles, characterized in that it is produced by the method for constructing reinforced earth piles using foamed polymeric soil cast-in-place piles according to any one of claims 1 to 9.

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