A pile sampling unit for sampling soil samples from a contaminated site excavation, the sampling pile

Abstract

The utility model belongs to the field of foundation pit soil detection technology, especially a pile type sampling unit and sampling pile for sampling of contaminated land foundation pit soil sample, the utility model discloses a pile type sampling unit, include: I type base pile, II type base pile, symmetrically arranged at I type base pile both sides, and with I type base pile is engaged, sampling platform, its above rotation is connected with a plurality of flap, and the angle between flap and I type base pile is adjustable, and the climbing ladder. Through I type base pile, II type base pile and the mutual engagement cooperation of sampling platform form stable structure, and the climbing ladder is arranged in the containing space between sampling platform and I type base pile, and the structural stability is good, and the flap rotation to horizontal can provide the foot of sampling personnel to step the support plate, and the support area is increased, and the flap can be automatically reset after sampling, and personnel is convenient to go up and down, and through arranging multiple sampling holes on I type base pile, sampling is convenient, and the sample representativeness is improved.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit soil testing technology, and in particular, it is a pile-type sampling unit and sampling pile for sampling soil samples from foundation pits of contaminated sites. Background Technology

[0002] Currently, ex-situ remediation is the most common method for contaminated site remediation, which requires the excavation of contaminated soil and landfill materials. Contaminated sites often exhibit deep contamination, uneven distribution of contaminants, and require layered and segmented excavation. Traditional excavation involves extensive slope protection, increasing workload and project costs. Larssen sheet piles, as a form of foundation pit support, offer advantages such as short construction periods and high reuse rates, making them particularly suitable for small-area, deep contaminated patches.

[0003] In the process of remediating contaminated sites, to assess whether the remediation of the foundation pit has met the standards, the construction unit and the effectiveness evaluation unit need to collect soil samples from the bottom and sidewalls of the pit and send them for testing. This process can lead to the following problems:

[0004] (1) At present, in the operation and soil sampling of the foundation pit supported by Larssen steel sheet piles, A-frame ladders or foundation pit ramps are often used to go up and down the foundation pit. A-frame ladders have poor stability because they have no fixed support points in the foundation pit supported by Larssen steel sheet piles. When the amount of soil samples collected at the bottom of the foundation pit is large, it is easy for personnel to carry a large amount of soil samples and climb up and down the A-frame ladder, which may cause overturning risk. Foundation pit ramps have higher stability, but they often occupy a large area and have high production costs. They also have a long construction and dismantling cycle, and are not suitable for foundation pits with small and deep contaminated patches supported by Larssen steel sheet piles.

[0005] (2) Currently, when collecting soil samples from the sidewall of a foundation pit supported by Larssen sheet piles, GP drilling rigs are often used to drive soil sampling pipes into the outer side of the foundation pit. However, GP drilling rigs are expensive and easily affected by the environment. After the site is cleared, the site is complex. If there is continuous rainy weather and the roads in the site are muddy, the GP drilling rig cannot drive into the designated sampling position normally. Excavators are required to cooperate with the operation, which increases the construction cost of earthmoving machinery and labor. In addition, the working space at some foundation pit sidewall sampling positions is limited, and the lack of working surface for GP drilling rigs leads to the deviation of sampling points, making the samples lose their representativeness.

[0006] (3) Polluted soil often has uneven distribution range and depth of pollution, which can easily lead to poor representativeness of soil sampling. Summary of the Invention

[0007] To address the aforementioned problems in the existing technology, this utility model provides a pile-type sampling unit, sampling pile, and construction method for sampling soil samples from foundation pits in contaminated sites. It occupies a small area and offers high safety and sampling representativeness.

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] In a first aspect, this utility model provides a pile-type sampling unit for sampling soil samples from foundation pits in contaminated sites, comprising:

[0010] Type I foundation piles, with multiple sampling holes arranged on them;

[0011] Type II foundation piles are symmetrically arranged on both sides of Type I foundation piles and interlock with Type I foundation piles;

[0012] The sampling platform engages with the Type II foundation piles on both sides via connectors, forming a receiving space between it and the Type I foundation piles. The top of the receiving space has an opening. Furthermore, several flaps are rotatably connected to it, and the flaps are arranged vertically with an adjustable angle between the flaps and the Type I foundation piles.

[0013] The climbing ladder is placed in the space between the sampling platform and the Type I foundation pile, and engages with the Type II foundation pile.

[0014] Optionally, an inner spiral groove is provided on the side wall of the Type II foundation pile near the Type I foundation pile, and inner spiral blocks are provided on both sides of the Type I foundation pile, with the inner spiral blocks on both sides respectively inserted and engaged in the inner spiral groove on the corresponding side.

[0015] The Type II foundation pile has a first opening groove on the side wall facing the Type I foundation pile. The first opening groove is connected to the inner spiral groove and to the accommodating space. The sampling platform is inserted into the first opening groove through a connector, and the connector is in contact with the inner spiral block.

[0016] Optionally, an I-beam is provided on the side wall of the Type II foundation pile near the Type I foundation pile. One side of the I-beam has an opening called a first opening slot, and the other side has an opening called a second opening slot. The second opening slot faces the receiving space, and the second opening slots on the two sides of the Type II foundation pile are opposite each other. The two sides of the climbing ladder are inserted and engaged in the second opening slot.

[0017] Optionally, the connector includes a connecting arc plate connected to the sampling platform, with vertical rods connected to both ends of the connecting arc plate, and the vertical rods being inserted into and engaged in the first opening groove on the Type II foundation pile.

[0018] Optionally, when the flap is in the first state, the flap is horizontal and located within the accommodating space; when the flap is in the second state, the flap is in contact with the inner wall of the sampling platform; and / or, multiple sampling holes are arranged in an array or along the vertical direction on the Type I foundation pile.

[0019] Optionally, the flap is connected to the sampling platform via a torsion spring.

[0020] Optionally, the climbing ladder is connected to the Type II foundation pile by at least two sets of screws, and / or, the Type I foundation pile and the Type II foundation pile are connected by at least two sets of screws; and / or, both the Type I and Type II foundation piles are U-shaped and their width increases from the bottom edge to the opening end, the opening of the Type I foundation pile faces the foundation pit, and the opening of the Type II foundation pile faces away from the foundation pit.

[0021] Optionally, it also includes a handrail, wherein the Type I foundation pile is provided with a insertion slot, and the handrail is inserted into the insertion slot via a first guide rod.

[0022] Optionally, one end of the handrail is inserted into the insertion slot via a first guide rod, and the other end is inserted into the soil outside the foundation pit via a second guide rod.

[0023] Secondly, this utility model also provides a sampling pile for sampling soil samples from a contaminated site foundation pit, characterized in that it includes steel sheet piles and the pile-type sampling unit for sampling soil samples from a contaminated site foundation pit as described in the first aspect, wherein the steel sheet piles are engaged and arranged on both sides of the pile-type sampling unit for sampling soil samples from a contaminated site foundation pit and together form a closed area.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] This invention utilizes a stable structure formed by the interlocking of Type I foundation piles, Type II foundation piles, and a sampling platform. A climbing ladder is positioned within the space between the sampling platform and the Type I foundation piles, ensuring good structural stability and minimizing the risk of tipping over as personnel climb the ladder. Once the sampling personnel reach a suitable height, they can rotate a corresponding flap to a horizontal position, providing footholds and increasing the support area. The flap automatically resets after sampling, facilitating easy access. Multiple sampling holes on the Type I foundation piles enhance sampling convenience and improve sample representativeness. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a first-view structural schematic diagram of a pile-type sampling unit for sampling soil samples from a foundation pit of a contaminated site, as described in an embodiment of the present invention.

[0028] Figure 2 This is a second-view structural schematic diagram of a pile-type sampling unit for sampling soil samples from a foundation pit of a contaminated site, as described in an embodiment of the present invention.

[0029] Figure 3 This is a partial structural schematic diagram of the Type I foundation pile in an embodiment of this utility model;

[0030] Figure 4 This is a partial structural schematic diagram of the Type II foundation pile in an embodiment of this utility model;

[0031] Figure 5 This is a structural schematic diagram illustrating the installation position of the climbing ladder in an embodiment of this utility model;

[0032] Figure 6 for Figure 5 Enlarged view of section A;

[0033] Figure 7 This is a schematic diagram of the sampling platform in an embodiment of the present invention, where a is a first view and b is a second view.

[0034] Figure 8 This is a schematic diagram of the arrangement of a pile-type sampling unit for sampling soil samples from a foundation pit of a contaminated site, according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Type I foundation pile; 11. Sampling hole; 12. Inner spiral block; 13. Insertion rod slot; 2. Type II foundation pile; 21. Inner spiral trench; 22. First opening slot; 23. Second opening slot; 25. I-beam; 26. Screw hole; 3. Sampling platform; 31. Flip plate; 32. Connecting arc plate; 33. Vertical rod; 4. Accommodation space; 5. Climbing ladder; 6. Handrail; 61. First guide rod; 62. Second guide rod; 7. Sheet pile. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] Example 1

[0041] like Figure 1 , Figure 2 and Figure 8 As shown, a pile-type sampling unit for sampling soil samples from a contaminated site foundation pit includes:

[0042] Type I foundation pile 1, on which multiple sampling holes 11 are arranged;

[0043] Type II foundation pile 2 is symmetrically arranged on both sides of Type I foundation pile 1 and is engaged with Type I foundation pile 1;

[0044] The sampling platform 3 engages with the Type II foundation piles 2 on both sides via connectors, forming a receiving space 4 between it and the Type I foundation piles 1. The receiving space 4 has an opening at its top. Furthermore, a number of flaps 31 are rotatably connected to it. The flaps 31 are arranged vertically, and the angle between the flaps 31 and the Type I foundation piles 1 is adjustable.

[0045] The climbing ladder 5 is arranged in the space 4 between the sampling platform 3 and the type I foundation pile 1, and is engaged with the type II foundation pile 2.

[0046] This utility model utilizes the interlocking and cooperation between Type I foundation piles 1, Type II foundation piles 2, and sampling platform 3 to form a stable structure. A climbing ladder 5 is arranged within the accommodating space 4 between the sampling platform 3 and Type I foundation piles 1. The structure offers good stability, and the ladder is unlikely to tip over when personnel climb it, eliminating the risk of falls. Once the personnel reach a suitable height, they can rotate the corresponding flap 31. The flap 31 rotates to a horizontal position, providing footholds and increasing the support area. After sampling, the flap 31 automatically resets for easy access. Multiple sampling holes 11 are arranged on the Type I foundation piles 1. In this embodiment, multiple sampling holes 11 are arranged in an array or vertically on the Type I foundation piles 1, facilitating sampling and improving sample representativeness.

[0047] like Figure 7 As shown, in this embodiment, when the flap 31 is in the first state, it is horizontal and located within the accommodating space 4. When the flap 31 is in the second state, it is flush with the inner wall of the sampling platform 3 (it can be at an 80° angle or other angles to the horizontal). Without external force, the flap 31 is in the second state, where it is flush with the sampling platform 3, ensuring sufficient space within the accommodating space 4 for personnel to ascend and descend along the climbing ladder 5, and preventing falls. When personnel reach the sampling height, they can apply force by stepping on the flap 31, causing it to rotate and stabilize back to the first state under pressure, raising the support surface and ensuring the safety of the workers. In this embodiment, the flap 31 is connected to the sampling platform 3 via a torsion spring. The elastic potential energy of the torsion spring allows the flap 31 to reset to the second state, and applying force allows it to rotate horizontally into the accommodating space 4.

[0048] In one possible embodiment, such as Figures 3-6 As shown, both Type I foundation pile 1 and Type II foundation pile 2 are U-shaped and their width increases from the bottom edge to the opening end. The opening of Type I foundation pile 1 faces the foundation pit, while the opening of Type II foundation pile 2 faces away from the foundation pit.

[0049] The Type II foundation pile 2 has an inner spiral groove 21 on the side wall near the Type I foundation pile 1. The Type I foundation pile 1 has inner spiral blocks 12 on both sides of its side wall. The inner spiral blocks 12 on both sides are respectively inserted and engaged in the inner spiral groove 21 on the corresponding side of the Type II foundation pile 2. The Type I foundation pile 1 and the Type II foundation pile 2 have at least two sets of screw holes 26 and are fixed by connecting them with screws.

[0050] like Figure 4As shown, the Type II foundation pile 2 has a first opening groove 22 on its side wall facing the Type I foundation pile 1. The first opening groove 22 is connected to the inner spiral groove 21 and the receiving space 4. The sampling platform 3 is inserted into the first opening groove 22 through a connector, which fits against the inner spiral block 12. Through the above design, the connector and the inner spiral block 12 fit against each other and limit each other, which can ensure structural stability and avoid horizontal misalignment.

[0051] Specifically, in this embodiment, an I-beam 25 is provided on the side wall of the Type II foundation pile 2 near the Type I foundation pile 1. One side of the I-beam 25 has an opening called a first slot 22 for inserting the connector, and the other side has an opening called a second slot 23 facing the receiving space 4. The second slots 23 on the two Type II foundation piles 2 face each other, and the two sides of the climbing ladder 5 are inserted and engaged in the second slots 23. The climbing ladder 5 is connected to the Type II foundation pile 2 by at least two sets of screws, thereby further fixing the climbing ladder 5. In this embodiment, the connector includes a connecting arc plate 32 connected to the sampling platform 3. The two ends of the connecting arc plate 32 are connected to vertical rods 33. The cross-section of the vertical rods 33 is arc-shaped, and the vertical rods 33 are inserted and engaged in the first slots 22 on the Type II foundation pile 2. The two vertical rods 33 are parallel to the sampling platform 3 and are arranged in the vertical direction.

[0052] It also includes a handrail 6. A slot 13 for inserting the handrail is arranged on the Type I foundation pile 1. One end of the handrail 6 is inserted into the slot 13 via a first guide rod 61, and the other end is inserted into the soil outside the foundation pit via a second guide rod 62. The arrangement of the handrail 6 provides a handhold for sampling personnel to go up and down the pit.

[0053] Example 2

[0054] This embodiment provides a sampling pile for sampling soil samples from a contaminated site foundation pit, including sheet piles 7 and the pile-type sampling unit for sampling soil samples from a contaminated site foundation pit as described in Embodiment 1. The sheet piles 7 are engaged and arranged on both sides of the pile-type sampling unit for sampling soil samples from a contaminated site foundation pit and together form a closed area.

[0055] Example 3

[0056] This embodiment provides a method for constructing sampling piles for soil sampling in foundation pits of contaminated sites, as described in Embodiment 2, including the following steps:

[0057] Before excavation, the contaminated patches were measured and marked out. The pile driver entered the site and, together with the spiral drill rod, drilled the pilot holes in the 7 areas where steel sheet piles were to be driven. On-site construction and technical personnel simultaneously observed the soil return. If an area with abnormal color or odor was found, that area was designated as the placement point for this utility model, and a flag was placed or ash was sprinkled to mark it.

[0058] According to the prior markings, the construction workers first drove Type I foundation piles 1 vertically downward into the soil at the designated location, with the opening of Type I foundation pile 1 facing into the foundation pit; after Type I foundation pile 1 was driven to the designated depth, Type II foundation piles were engaged with Type I foundation piles, and Type II foundation piles were driven on both sides of Type I foundation piles so that their bottom surfaces were inserted into the soil at the bottom of the foundation pit, until the top surfaces were at the same height;

[0059] Continue to install 7 sheet piles along the sides of the Type II foundation piles on both sides until a closed area is formed. Then, the contaminated soil in the closed area is excavated.

[0060] Connect the climbing ladder 5 to the type II foundation pile 2 and insert the bottom of the climbing ladder 5 into the soil at the bottom of the foundation pit; connect the sampling platform 3 to the type II foundation pile 2 through the connector and insert the bottom of the sampling platform 3 into the soil at the bottom of the foundation pit.

[0061] When collecting soil samples from the bottom of the foundation pit or conducting pit bottom operations, sampling personnel hold onto the guide rod 6 and ascend or descend the climbing ladder 5. The climbing ladder 5 is embedded in the soil at the bottom of the pit and is engaged with the Type II foundation piles and fixed with bolts, ensuring its stability and effectively preventing overturning. The sampling platform 3 on the rear side wall also serves as a protective enclosure, further ensuring the safety of sampling and operation personnel as they ascend or descend the pit and preventing production accidents. When sampling the side wall of the foundation pit, after climbing the climbing ladder 5 to a suitable height, personnel can stand on the flap 31 when it is parallel to the ground by stepping on it with external force. After the external force is removed, the flap 31 can automatically return to an 80° angle with the horizontal plane. Then, standing on the flap 31, soil samples are taken by inserting a soil ring cutter into the sampling hole of the Type I foundation pile.

[0062] This utility model provides a pile-type sampling unit for sampling soil samples from foundation pits in contaminated sites, which effectively saves working space, shortens the construction cycle, and effectively prevents and mitigates the potential risks of personnel working up and down in deep foundation pits.

[0063] This utility model has multiple sampling holes 11 arranged on the Type I foundation pile 1, which broadens the sampling path for soil samples from the side wall of the foundation pit during acceptance and can effectively locate the depth and extent of pollution. Combined with the soil return situation during the preparation stage, the placement of the device can increase the pollution detection and identification rate, improve the representativeness of the samples, avoid missing potential pollution, and affect the later acceptance work.

[0064] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will be able to understand the specific meaning of the above terms in this application based on the specific circumstances.

[0065] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A pile-type sampling unit for sampling soil samples from foundation pits in contaminated sites, characterized in that, include: Type I foundation piles, with multiple sampling holes arranged on them; Type II foundation piles are symmetrically arranged on both sides of Type I foundation piles and interlock with Type I foundation piles; The sampling platform engages with the Type II foundation piles on both sides via connectors, forming a receiving space between it and the Type I foundation piles. The top of the receiving space has an opening. Furthermore, several flaps are rotatably connected to it, and the flaps are arranged vertically with an adjustable angle between the flaps and the Type I foundation piles. The climbing ladder is placed in the space between the sampling platform and the Type I foundation pile, and engages with the Type II foundation pile.

2. The pile-type sampling unit for sampling soil samples from foundation pits of contaminated sites according to claim 1, characterized in that, The Type II foundation pile has an inner spiral groove on the side wall closest to the Type I foundation pile, and the Type I foundation pile has inner spiral blocks on both sides, which are respectively inserted and engaged in the inner spiral groove on the corresponding side. The Type II foundation pile has a first opening groove on the side wall facing the Type I foundation pile. The first opening groove is connected to the inner spiral groove and to the accommodating space. The sampling platform is inserted into the first opening groove through a connector, and the connector is in contact with the inner spiral block.

3. The pile-type sampling unit for sampling soil samples from foundation pits of contaminated sites according to claim 2, characterized in that, An I-beam is provided on the side wall of the Type II foundation pile near the Type I foundation pile. One side of the I-beam has an opening called a first opening slot, and the other side has an opening called a second opening slot. The second opening slot faces the receiving space. The second opening slots on the two sides of the Type II foundation pile are opposite each other. The two sides of the climbing ladder are inserted and engaged in the second opening slot.

4. The pile-type sampling unit for sampling soil samples from foundation pits of contaminated sites according to claim 2, characterized in that, The connector includes a connecting arc plate connected to the sampling platform, with vertical rods connected to both ends of the connecting arc plate. The vertical rods are inserted into and engaged in the first opening groove on the Type II foundation pile.

5. The pile-type sampling unit for sampling soil samples from foundation pits of contaminated sites according to claim 1, characterized in that, When the flap is in the first state, the flap is horizontal and located within the accommodating space; when the flap is in the second state, the flap is in contact with the inner wall of the sampling platform; and / or, multiple sampling holes are arranged in an array or along the vertical direction on the Type I foundation pile.

6. The pile-type sampling unit for sampling soil samples from foundation pits of contaminated sites according to claim 1, characterized in that, The climbing ladder is connected to the Type II foundation pile by at least two sets of screws, and / or the Type I foundation pile and the Type II foundation pile are connected by at least two sets of screws; and / or both the Type I and Type II foundation piles are U-shaped and their width increases from the bottom edge to the opening end, the opening of the Type I foundation pile faces the foundation pit, and the opening of the Type II foundation pile faces away from the foundation pit.

7. The pile-type sampling unit for sampling soil samples from foundation pits of contaminated sites according to claim 1, characterized in that, It also includes a handrail, on which a slot for inserting a handrail is provided, and the handrail is inserted into the slot via a first guide rod.

8. The pile-type sampling unit for sampling soil samples from foundation pits of contaminated sites according to claim 7, characterized in that, One end of the handrail is inserted into the insertion slot via a first guide rod, and the other end is inserted into the soil outside the foundation pit via a second guide rod.

9. A sampling pile for sampling soil samples from a foundation pit in a contaminated site, characterized in that, Includes sheet piles and a pile-type sampling unit for sampling soil samples from a foundation pit of a contaminated site as described in any one of claims 1-8, wherein the sheet piles are interlocked on both sides of the pile-type sampling unit for sampling soil samples from a foundation pit of a contaminated site and together form a closed area.

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