Humus soil geological coordinate control pile for plateau alpine wetland

Abstract

The utility model provides a humus geological coordinate control pile for a plateau alpine wetland, which is characterized in that a grouting pipe which is driven downwards is arranged at the bottom of a foundation pit, and grouting holes are uniformly distributed at the middle lower part of the grouting pipe, so that the grouting pipe and plain soil are mutually consolidated into a concrete pile through grouting; the supporting rod extends into the grouting pipe and is fixedly connected with concrete in the grouting pipe into a whole, and the upper end of the supporting rod extends upwards into the foundation pit and is used for being connected with a measurement mark; the cover plate is located in the foundation pit and used for sealing the foundation pit. The grouting pipe is erected underground, a concrete consolidation area is formed through grouting, and along with concrete solidification, the concrete consolidation area, the grouting pipe and the supporting rod are connected into a whole, so that the stability of a soil body can be enhanced, and sedimentation of soft geology is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of geological surveying, specifically relating to a geological coordinate control stake for humus soil in high-altitude, cold, and wetland areas. Background Technology

[0002] CPⅠ (Basic Plane Control Network) is the first-level control network for high-speed railway engineering surveying, used to provide high-precision coordinate benchmarks for surveying, construction, and operation and maintenance. As position stakes at both ends of the extended axis during engineering construction, it is used to restore and calibrate other axes, ensuring the geometric accuracy of the engineering structure.

[0003] The existing CPⅠ burial method involves digging a pit on the ground surface, pouring concrete, and burying the survey markers in the concrete. The survey markers are generally made of metal or stainless steel and are fixed with welded steel bars at the bottom to ensure long-term stability. However, due to the poor geological stability of humus soil in high-altitude, cold, and wetland areas, the conventional control point structure is prone to deformation and settlement.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a geological coordinate control stake for humus soil in high-altitude, cold, and wetland areas.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A geological coordinate control stake for high-altitude, cold, wetland humus soil includes:

[0008] The foundation pit is equipped with a downward-driving grouting pipe at the bottom of the foundation pit. The grouting pipe has grouting holes evenly distributed in its lower part, so that the grouting pipe and the plain soil can be consolidated together to form a concrete pile through grouting.

[0009] A support rod extends into the grouting pipe and is integrally bonded to the concrete inside the grouting pipe. The upper end of the support rod extends upward into the foundation pit for connecting measurement markers.

[0010] A cover plate, located inside the pit, is used to seal the pit.

[0011] Preferably, the pit is a frustum-shaped cone with the smaller end facing downwards, and a frustum-shaped well sleeve is correspondingly installed inside the pit to support the cover plate.

[0012] Preferably, the outer wall of the well casing is provided with a plurality of evenly distributed positioning ribs, which extend radially into the plain soil outside the foundation pit.

[0013] Preferably, the upper surface of the cover plate is provided with a marker.

[0014] Preferably, the lower end of the grouting pipe is provided with a conical bottom.

[0015] Beneficial effects: By installing grouting pipes underground, a concrete consolidation zone is formed through grouting. As the concrete solidifies, the consolidation zone connects with the grouting pipes and support rods, thereby enhancing the stability of the soil and preventing settlement in weak geological formations. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0017] Figure 1 This is a simplified structural diagram of the coordinate control pile in a specific embodiment of this utility model.

[0018] In the diagram: 1. Plain soil; 2. Concrete; 3. Grouting pipe; 4. Support rod; 5. Measurement marker; 6. Cover plate; 7. Well casing; 8. Positioning reinforcement; 9. Support plate. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0020] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0022] like Figure 1As shown, a geological coordinate control pile for humus soil in high-altitude, cold wetlands includes a foundation pit, a support rod 4, and a cover plate 6. The foundation pit is formed by excavation and can be 1-1.5m deep, thus avoiding the humus layer above the soil as much as possible. A downward-driving grouting pipe 3 is installed at the bottom of the foundation pit. The grouting pipe 3 is a metal pipe with a length of not less than 3m. Grouting holes are evenly distributed in the lower half to two-thirds of the grouting pipe 3, allowing concrete grout to penetrate and seep outwards. After grouting, the grouting pipe 3 and the plain soil 1 are mutually consolidated to form a concrete pile 2. To ensure soil stability at the corresponding location, support rod 4 extends into grouting pipe 3. Specifically, support rod 4 is inserted into grouting pipe 3 before the grout solidifies. The length of support rod 4 is matched with the length of grouting pipe 3, so that it can be solidified with the concrete 2 inside grouting pipe 3 after the concrete 2 solidifies. The upper end of support rod 4 extends upward into the foundation pit to connect measurement marker 5. Cover plate 6 is located inside the foundation pit to seal it. During non-measurement periods, cover plate 6 is placed over the foundation pit to protect the internal measurement marker 5. Measurement markers are generally made of metal or stainless steel.

[0023] In this embodiment, the support rod 4 can be a threaded steel bar, which can ensure the consolidation strength between it and the concrete 2 and ensure the stability of the measuring mark 5.

[0024] In one optional embodiment, the foundation pit is a frustum-shaped cone with the small end facing down. A frustum-shaped well sleeve 7 is correspondingly provided in the foundation pit to ensure the support capacity of the soil surface layer for the well sleeve 7. In addition, a cover plate 6 for supporting is provided above the well sleeve 7. Correspondingly, the outer periphery of the cover plate 6 is a conical surface adapted to the well sleeve 7.

[0025] The outer wall of the well casing 7 is provided with multiple evenly distributed positioning bars 8. The positioning bars 8 are steel bars that extend into the plain soil 1 outside the foundation pit along the radial direction of the well casing 7. The multiple positioning bars 8 are evenly distributed around the circumference of the well casing 7, and the multiple layers of positioning bars 8 are evenly distributed in the axial direction of the well casing 7.

[0026] The outer ends of each layer of positioning bars outside the well casing 7 are connected to the same ring bar, which can assist the positioning bars 8 in positioning and improve the stability of the well casing 7. In the specific construction, the foundation pit is first excavated. At this time, the diameter of the foundation pit is larger than the outer circle of the positioning bar 8. After the excavation is completed, the grouting pipe is installed at the bottom. After the grouting is completed, the support rod is placed, and then the well casing is installed. Then, plain soil is backfilled so that the plain soil layer around the foundation pit of the positioning bar 8 forms a stable connection.

[0027] Furthermore, a marker is provided on the upper surface of the cover plate 6. The marker can be a metal pole or a ring-shaped metal plate set on the upper surface of the cover plate 6, etc. It is only necessary to mark the position of the cover plate 6. There are no excessive restrictions on the specific structure and connection method of the marker.

[0028] In an optional embodiment, the lower end of the grouting pipe 3 is provided with a conical bottom, so that the grouting pipe 3 can be quickly driven to the preset position by an impact hammer, thereby simplifying the construction steps and facilitating implementation.

[0029] In this embodiment, the upper end of the grouting pipe 3 is provided with a support plate 9 corresponding to the bottom surface of the foundation pit. The support plate 9 is a disc structure corresponding to the lower end surface of the well casing 7. The middle part of the support plate 9 is provided with a central hole corresponding to the grouting pipe 3. The two are slidably assembled by sleeve connection. The outer periphery of the support plate 9 is adapted to the diameter of the lower end surface of the well casing 7, so that it can be spliced ​​with the well casing 7 into a whole. It can also make the foundation pit ground flat and avoid soil or corrosive materials from affecting the environment inside the well.

[0030] Furthermore, a rubber pad corresponding to the lower end face of the well casing 7 is provided on the upper surface of the support plate 9, so that the sealing performance of the two can be improved by the pressure of the well casing 7, and groundwater can be prevented from entering the well casing 7.

[0031] In an optional embodiment, the inner diameter of the grouting pipe 3 is 3 cm, and the spacing between the support rods 4 is 1.5 cm. Multiple radially welded inserts are provided on the outside of the support rods 4. The length of the inserts is no more than 0.5 cm to facilitate easy insertion of the grouting pipe 3. A handle is provided on the top of the cover plate 6 for easy gripping and opening of the foundation pit.

[0032] In an optional embodiment, a threaded sleeve corresponding to the support rod is provided below the measuring mark 5. The threaded sleeve is fixed to the upper end of the support rod by threaded assembly. The length of the threaded sleeve is constant, which facilitates the estimation of the upper elevation of the support rod and thus monitors the settlement. The length of the threaded sleeve is greater than the depth of the pit, so it can extend above the pit for easy observation. Therefore, when measurement is needed, the threaded sleeve can be fitted to the upper end of the support rod, so that the measuring mark 5 extends upwards out of the pit for easy measurement. When measurement is not needed, the measuring mark 5 can be removed.

[0033] The outer wall of the grouting pipe 3 is provided with a longitudinally extending guide groove. The guide groove passes through the corresponding grouting hole, which can ensure the uniformity of the grout around the outer periphery of the grouting pipe 3 and avoid uneven grouting caused by blockage of one of the grouting pipes.

[0034] In this embodiment, four rows of grouting holes are provided around the outer periphery of the grouting pipe 3, and each row of grouting holes includes multiple grouting holes evenly distributed along the axial direction of the grouting pipe 3. Correspondingly, four guide grooves are provided, and the four guide grooves correspond one-to-one with the four rows of grouting holes.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A geological coordinate control stake for humus soil in high-altitude, cold wetlands, characterized in that, include: The foundation pit is equipped with a downward-driving grouting pipe at the bottom of the foundation pit. The grouting pipe has grouting holes evenly distributed in its lower part, so that the grouting pipe and the plain soil can be consolidated together to form a concrete pile through grouting. A support rod extends into the grouting pipe and is integrally bonded to the concrete inside the grouting pipe. The upper end of the support rod extends upward into the foundation pit for connecting measurement markers. A cover plate, located inside the pit, is used to seal the pit.

2. The geological coordinate control stake for high-altitude, cold, wetland humus soil according to claim 1, characterized in that, The pit is a frustum-shaped cone with the smaller end facing down. A frustum-shaped well casing is installed inside the pit to support the cover plate.

3. The geological coordinate control stake for high-altitude, cold, wetland humus soil according to claim 2, characterized in that, The outer wall of the well casing is provided with a plurality of evenly distributed positioning ribs, which extend radially into the plain soil outside the foundation pit.

4. The geological coordinate control stake for high-altitude, cold, wetland humus soil according to claim 1, characterized in that, The upper surface of the cover plate is marked.

5. The geological coordinate control stake for high-altitude, cold, wetland humus soil according to claim 1, characterized in that, The lower end of the grouting pipe is provided with a conical bottom.

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