Submerged line boundary post for construction land acquisition and immigrant engineering surveying

Abstract

The utility model discloses a submerging line boundary pile for construction land acquisition and immigrant engineering survey, which comprises a pile body (4), the top surface of the pile body is arranged as a mark surface (11), the pile body comprises a first cylinder and a second cylinder, the cross sectional area of the first cylinder is larger than that of the second cylinder, and the first cylinder and the second cylinder are arranged in a staggered mode. The lower end of the first cylinder body is connected with the upper end of the second cylinder body, the first cylinder body is filled with concrete (5), the upper part of the second cylinder body is provided with a mortar pouring port (7), and mortar overflow holes (9) are distributed in a cylinder body of the second cylinder body. The utility model has the functional characteristics of environmental protection, portability, durability, attractive appearance and high efficiency.

Description

Technical Field

[0001] This utility model relates to engineering boundary markers, specifically a submerged boundary marker used for surveying land acquisition and resettlement engineering projects. Background Technology

[0002] The inundation line boundary stakes used in land acquisition and resettlement engineering surveys are crucial for the physical indicator survey phase of reservoir resettlement projects, from the issuance of the suspension notice during the feasibility study stage to the approval stage. They are an important component of resettlement planning and design. During the physical indicator survey phase, different types of boundary stakes (e.g., population stakes, land stakes, water level stakes, etc.) correspond to different inundated objects and are used for boundary confirmation, ownership clarification, indicator registration, and planning design for various objects. These are important achievements before the hydropower project is approved for construction.

[0003] Traditional hydropower engineering surveying primarily uses reinforced concrete stakes, wooden stakes, and markers carved into exposed rock as boundary markers. Among permanent boundary markers, concrete stakes have the major drawback of being heavy and difficult to transport. They are also prone to weathering, making them unsuitable for long-term use. Furthermore, their unsightly surface makes them difficult to spot from a distance. The large work area and significant amount of concrete required for on-site installation reduce their versatility and efficiency, hindering energy conservation and environmental protection. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing concrete submerged boundary markers are heavy and inconvenient to transport. One of the purposes of this utility model is to provide a submerged boundary marker for construction land acquisition and resettlement engineering surveying that is easy to transport.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A flood boundary stake for land acquisition and resettlement engineering surveying includes a stake body, the top surface of which is set as a marker surface. Its structural features are as follows: the stake body includes a first cylinder and a second cylinder, the cross-sectional area of ​​the first cylinder is larger than that of the second cylinder, the lower end of the first cylinder is connected to the upper end of the second cylinder, the first cylinder is filled with concrete, the upper part of the second cylinder is provided with a mortar injection port, and mortar overflow holes are distributed on the cylinder body of the second cylinder.

[0007] Preferably, the first cylinder and the second cylinder are made of stainless steel, and fixed reinforcing bars are distributed at different height positions of the second cylinder, the fixed reinforcing bars passing through the second cylinder and the ends of the fixed reinforcing bars extending out of the second cylinder.

[0008] Preferably, the first cylinder and the second cylinder are made of 1-3mm thick 304 stainless steel.

[0009] Preferably, the diameter of the first cylinder is Ф140mm to meet the requirement of 100mm side length for the square marking surface on the top of the concrete boundary marker in the specification, while also allowing the markings to be arranged reasonably and clearly visible; the diameter of the second cylinder is Ф60mm to facilitate the handling of the boundary marker.

[0010] Preferably, when the flooded boundary stake is used, cement mortar is injected into the second cylinder, and the cement mortar overflows from the mortar overflow hole to wrap around the surrounding soil and the second cylinder.

[0011] Preferably, a back plate is installed on the back of the label to prevent laser engraving and damage from surface penetration during welding of the back of the label to the surrounding pile body.

[0012] Preferably, the overall length of the pile body is 1-1.4m and the overall weight is 5-10kg.

[0013] Preferably, the diameter of the mortar overflow hole is Ф20mm and it is evenly distributed, so that when the pile is buried, the cement mortar injected into the second cylinder can flow out fully from the mortar overflow hole, thereby strengthening the stability of the boundary pile.

[0014] Preferably, the mortar injection port is a square opening with a side length of 10-40mm. During grouting, it is used in conjunction with mortar injection equipment, conduits, funnels, etc., to ensure that the cement mortar can flow smoothly through the conduit.

[0015] Preferably, the fixing steel bars are conventional steel bars with a diameter of Ф5mm and a length of 120mm-140mm, and the fixing steel bars are firmly welded to the second cylinder. The number of fixing steel bars is controlled at 3-7, with the purpose of firmly fixing the inside of the pile body and the pile body to the external soil.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1) This utility model, through its design of being larger at the top and smaller at the bottom, and with concrete pre-filled only in the upper first cylinder, not only significantly reduces the weight of the boundary marker;

[0018] 2) This utility model uses stainless steel material combined with concrete, which reduces the excavation surface and the amount of concrete used on site. This ensures both the firmness and durability of the boundary markers and their environmental friendliness and aesthetics. The excavation or covering work surface and workload during transportation and installation are smaller, which improves efficiency and greatly reduces the amount of concrete used, which is beneficial to environmental protection.

[0019] 3) The principle and structure of this utility model are simple, the manufacturing cost is very low, and it is easy to mass-produce and install;

[0020] 4) This utility model is made of stainless steel, with a smooth and beautiful surface that is easy to spot and identify from a distance. The label is laser-engraved, which is convenient for long-term preservation and use in the field. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an embodiment of the flooded boundary stake for land acquisition and resettlement engineering surveying according to this utility model.

[0023] Figure 2 This is a reference diagram of an embodiment of the flooded boundary stake used for surveying land acquisition and resettlement projects according to this utility model.

[0024] In the diagram: 1—Boundary category and number, where L represents the left bank and R represents the right bank;

[0025] 2—Central symbol;

[0026] 3—Date of installation;

[0027] 4—Pile body; 41—First cylinder; 42—Second cylinder;

[0028] 5—Fill with concrete;

[0029] 6—Surface;

[0030] 7—Mortar injection port;

[0031] 8—Cement mortar;

[0032] 9—Mortar overflow hole;

[0033] 10—Fixed reinforcing bars;

[0034] 11 - Standard face. Detailed Implementation

[0035] The present invention will be further described below with reference to specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Please see Figure 1 An embodiment of the present invention for surveying submerged boundary stakes in land acquisition and resettlement engineering includes a stake body 4. The stake body 4 includes a first cylinder 41 and a second cylinder 42 made of lightweight metal material. The cross-sectional area of ​​the first cylinder 41 is larger than that of the second cylinder 42. The lower end of the first cylinder 41 is welded to the upper end of the second cylinder 42. The first cylinder 41 is filled with concrete 5. A mortar injection port 7 is provided at the upper part of the second cylinder 42. Mortar overflow holes 9 are evenly distributed on the cylinder body of the second cylinder 42.

[0039] The mortar injection port 7 must be machined simultaneously during the fabrication of the second cylinder 42 so that cement mortar 8 can be injected into the interior of the second cylinder 42 using a grouting device during installation. Simultaneously, the opening of the mortar injection port 7 is positioned towards the upper half of the second cylinder 42 to ensure that the mortar, after being injected by gravity, fully fills the inner cavity of the second cylinder 42 and flows out from the mortar overflow hole 9 under its own weight, enveloping the soil and the pile body, thus facilitating the stability of the boundary pile.

[0040] The first cylinder 41 and the second cylinder 42 are preferably made of 304 stainless steel with a thickness of 1-3mm, and fixed steel bars 10 are distributed at different height positions of the second cylinder 42. The fixed steel bars 10 penetrate the second cylinder 42, and the ends of the fixed steel bars 10 extend out of the second cylinder 42.

[0041] When the flooded boundary stake is in use, cement mortar 8 is injected into the second cylinder 42, and the cement mortar 8 overflows from the mortar overflow hole 9 and wraps around the surrounding soil and the outer wall of the second cylinder 42.

[0042] The top surface of the first cylindrical body 41 is designated as a marking surface 11 for marking the boundary marker type and number 1, center mark 2, and burial date 3. The marking surface 11 is preferably made of stainless steel and laser-engraved to ensure the long-term use of the permanent boundary marker.

[0043] When the label is made of stainless steel with a thickness of less than 3mm, a stainless steel back plate of the same size (not shown in the figure) is welded to the back of the label 11 to meet the requirements of laser engraving on the label and welding connection between the label 11 and the first cylinder 41, and to prevent the label 11 from being penetrated and damaged.

[0044] The overall design of this utility model of submerged boundary stake follows the principles of standardization and practicality while taking into account the reduction of unit cost. It satisfies both aesthetic requirements and can be widely promoted in the surveying and setting of submerged boundary stakes in engineering surveying.

[0045] In the manufacture of this utility model, the first cylinder 41 and the second cylinder 42 preferably adopt a cylindrical structure with a stainless steel thickness of 3mm. The diameter of the first cylinder 41 exposed above the ground is Ф140mm to meet the requirement of a 100mm side length for the square marking surface on the upper part of the concrete boundary marker in the specification. At the same time, it achieves a more reasonable and clearly visible arrangement of the boundary marker type and number 1, center mark 2, and burial date 3. The diameter of the second cylinder 42 buried underground is Ф60mm to facilitate the transportation of the boundary marker. A mortar overflow hole 9 is opened at Ф20mm on the second cylinder 42 so that the cement mortar 8 poured into the second cylinder 42 can fully overflow during the burial of the boundary marker. Overflow hole 9 flows out to enhance the stability of the boundary pile; mortar injection port 7 preferably adopts an opening with a side length of 10-40mm. During grouting, it is used in conjunction with mortar injection equipment, guide pipes, funnels, etc., to ensure that the cement mortar 8 flows smoothly through the guide pipe; the filling concrete 5 adopts C20 type concrete and is precast, poured, cured and solidified in the processing plant for easy on-site installation; the fixing steel bar 10 preferably adopts conventional steel bar with Ф5mm and a length of 120mm-140mm, which runs horizontally through the second cylinder 42 and is welded firmly, with the number controlled at 3-7 bars. The purpose of setting the fixing steel bar 10 is to firmly fix the inside of the pile body and the pile body to the outside to prevent it from being pulled out.

[0046] The interface between the first cylinder 41 and the marker 11 is welded with an internal backing plate, resulting in a smooth and regular external interface with strong integration. The inner walls of the first cylinder 41 and the second cylinder 42 are connected by welding. The portion of the second cylinder 42 extending beyond the first cylinder 41 is drilled with holes evenly spaced according to the Ф20mm principle. Simultaneously, Ф5mm, 120mm long fixing steel bars 10 are welded and fixed at the top, middle, and bottom. The fixing steel bars 10 traverse the maximum diameter of the second cylinder 42. The direction of the fixing steel bars 10 does not need to be consistent at different locations; the number of fixing steel bars 10 inserted into the second cylinder 42 can be flexibly adjusted according to different geological conditions to ensure the boundary stake is firmly fixed after being buried in the soil. During the processing of the stainless steel pile body 4, the mortar injection port 7 must be simultaneously formed so that cement mortar 8 can be injected into the interior of the second cylinder 42 using grouting equipment during installation. Meanwhile, the opening of the mortar injection port 7 is offset towards the upper part of the second cylinder 42, so that the mortar can be fully filled after being injected by gravity and flow out from the mortar overflow hole 9 under its own weight, covering the soil and the pile body 4 before solidifying, which is beneficial to the stability of the boundary pile. After the stainless steel pile body 4 is processed, the filling concrete 5 is poured and cured according to the C20 standard in the processing plant to form the preliminary pile structure. The overall length of the pile body is 1-1.4m. The amount of concrete used in this submerged boundary pile design is reduced by about 75% compared with traditional concrete boundary piles, and the weight is 5-10kg, compared with the weight of 60-80kg of traditional boundary piles. The design and surveying process of this boundary pile follows the principles of energy conservation and environmental protection. It not only meets the requirements of being lightweight during transportation, handling and burial, but is also more aesthetically pleasing and easy to preserve permanently, which can greatly improve work efficiency and liberate productivity.

[0047] When this utility model is installed, the upper part of the first cylinder 41 protrudes above the ground at a height of 0.15-0.25m, while the lower part of the first cylinder 41 is buried in the soil, resulting in a smooth and flat surface. The specific steps for installing the boundary markers are as follows: First, professionals use surveying instruments and refer to the drawn submerged line to conduct on-site surveying based on the boundary marker elevation results to obtain the boundary marker positions. Excavation is then carried out, with holes drilled to a depth of 0.85-1.15m using tools. The upper part is widened and excavated to a certain depth, ensuring that the mortar injection port 7 is below the ground surface and exposed. Second, the submerged line boundary marker of this utility model is placed into the excavated hole and covered with soil, ensuring that the soil cover does not exceed the highest point of the mortar injection port 7. The third step involves preparing pure cement mortar on-site and slowly and continuously injecting it into the steel pipe of the second cylinder 42 through the mortar injection port 7 using a mortar injection device. The mortar flows into the bottom of the second cylinder 42 and overflows fully from the mortar overflow hole 9, covering the soil and the pile body. This facilitates the bonding and solidification of the cement mortar with the soil, thus securing the boundary pile. Once cement mortar overflows from the mortar injection port 7, pressure injection continues until a certain level is reached. The fourth step involves covering the boundary pile with soil to a certain elevation after the mortar has solidified, and compacting it to the ground surface 6. Finally, as needed, additional concrete is poured at the contact point between the boundary pile and the ground surface, completing the installation.

[0048] This utility model's submerged boundary marker, as a permanent boundary marker (steel pipe pile), is lighter in weight and smaller in size compared to concrete piles. During installation, it does not require complex traditional excavation tools to dig large areas of land; only readily available drilling tools such as gasoline picks are needed. Traditional pure concrete piles require excavating land with sides of 1-2 meters, while this utility model's submerged boundary marker only requires excavating land with sides of 0.3-0.5 meters, saving concrete and reducing the excavation work area, thus protecting the environment and saving energy.

[0049] The test results show that the boundary stakes for land acquisition and resettlement engineering surveying of this utility model, as boundary stakes based on the combination of stainless steel pipe and concrete, play a key role in the efficient surveying and setting of large numbers of boundary stakes in hydropower reservoir areas. At the same time, it is conducive to the protection of nature and energy conservation and environmental protection: the boundary stakes of this utility model, based on stainless steel pipe, concrete and cement mortar, reduce the amount of concrete used by about 75%, and the excavation and burial takes about 20 minutes (traditional concrete boundary stakes take an average of 60-90 minutes). Including transportation time, the unit of manual labor can be reduced by an average of 50% or more. The boundary stakes are environmentally friendly, aesthetically pleasing and easy to find in the field. They not only meet the requirements for boundary stake surveying and setting, but also benefit the energy conservation, environmental protection and nature conservation of engineering projects.

[0050] Practical experience has shown that the inundation boundary stakes for land acquisition and resettlement engineering surveying of this utility model are suitable for large-scale and large-volume installation in reservoir areas of hydropower projects.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model should fall within the protection scope of the technical solution of this utility model.

Claims

1. A flood boundary stake for land acquisition and resettlement engineering surveying, comprising a stake body (4), wherein the top surface of the stake body is configured as a marker surface (11), characterized in that, The pile body includes a first cylinder and a second cylinder. The cross-sectional area of ​​the first cylinder is larger than that of the second cylinder. The lower end of the first cylinder is connected to the upper end of the second cylinder. The first cylinder is filled with concrete (5). A mortar injection port (7) is provided on the upper part of the second cylinder. Mortar overflow holes (9) are distributed on the cylinder body of the second cylinder.

2. The submerged boundary marker for land acquisition and resettlement engineering surveying as described in claim 1, characterized in that, The first cylinder and the second cylinder are made of stainless steel, and fixed steel bars (10) are distributed at different height positions of the second cylinder. The fixed steel bars pass through the second cylinder and the ends of the fixed steel bars extend out of the second cylinder.

3. The submerged boundary marker for land acquisition and resettlement engineering surveying as described in claim 2, characterized in that, The first cylinder and the second cylinder are made of 1-3mm thick 304 stainless steel.

4. The submerged boundary marker for land acquisition and resettlement engineering surveying as described in claim 2, characterized in that, The diameter of the first cylinder is Ф140mm, and the diameter of the second cylinder is Ф60mm.

5. The submerged boundary marker for land acquisition and resettlement engineering surveying as described in claim 1, characterized in that, When the flood boundary stake is in use, cement mortar (8) is injected into the second cylinder, and the cement mortar overflows from the mortar overflow hole to wrap the surrounding soil and the second cylinder.

6. The submerged boundary marker for land acquisition and resettlement engineering surveying as described in claim 1, characterized in that, A back plate is installed on the back of the label.

7. The submerged boundary stake for land acquisition and resettlement engineering surveying according to any one of claims 1-6, characterized in that, The overall length of the pile is 1-1.4m, and the overall weight is 5-10kg.

8. The submerged boundary stake for land acquisition and resettlement engineering surveying according to any one of claims 1-6, characterized in that, The diameter of the mortar overflow hole is Ф20mm.

9. The submerged boundary stake for land acquisition and resettlement engineering surveying according to any one of claims 1-6, characterized in that, The mortar injection port is a square opening with a side length of 10-40mm.

10. The flood boundary stake for land acquisition and resettlement engineering surveying according to any one of claims 2-4, characterized in that, The fixing reinforcing bars are conventional reinforcing bars with a diameter of Ф5mm and a length of 120mm-140mm. The fixing reinforcing bars are firmly welded to the second cylinder, and the number is controlled to be 3-7.

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