Water collection stratum drilling construction platform
By setting a base, raised platform, guardrail and drill casing in the rounded gravel or gravel-sand layer, and using high-concentration mud wall protection, the problems of hole wall collapse and poor stability are solved, and the stability during the drilling process is improved.
Patent Information
- Application Number
- CN202423086115.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-12-13
AI Technical Summary
When drilling in gravel or gravel-sand formations, the hole wall is prone to collapse and the drilling platform is unstable, which is difficult to effectively solve with existing technologies.
A drilling construction platform for water-collecting strata is designed, which includes a base, a raised platform, a guardrail and a drill casing. The base is higher than the water level, the guardrail is surrounded by guard piles, and the bottom end is inserted below the groundwater level. The drill casing is set on the raised platform, and high-concentration clay mud is used to protect the drilling wall.
The mud skin formed by the difference in internal and external water heads compresses the hole wall, blocks the groundwater flow, keeps the hole wall stable, avoids collapse, and improves the stability of the drilling.
Smart Images
Figure CN223344009U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction engineering, in particular to a water-collecting stratum drilling construction platform. Background Art
[0002] A type of rounded gravel or gravel-sand formation, with a thickness of more than 40m, that has poor mechanical properties, deformation characteristics, and permeability stability. In water conservancy projects constructed in this formation, the foundations of large hydraulic structures generally adopt pile foundations, and rotary drilling rigs are often used for drilling. Before drilling, a drilling platform above the water level is generally constructed in the formation water collection area, and then a hole is drilled into the formation from the drilling platform. However, on the one hand, during the drilling process, the external water pressure is likely to be greater than the water pressure inside the hole, causing the mud in the hole to be in a state of counter-pressure from the outside to the inside against the groundwater level, causing the hole wall to collapse inward and poor stability. On the other hand, the periphery of the drilling platform is generally not protected, resulting in poor stability. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a water-collecting stratum drilling construction platform which can improve the stability of the drilling and prevent the hole wall from collapsing inwards.
[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0005] A water-collecting stratum drilling construction platform includes a base arranged on the stratum, the top surface of the base is higher than the water level on the stratum, a raised platform is provided on the base, a guardrail is provided around the raised platform, the bottom end of the guardrail is inserted below the groundwater level of the stratum, and a vertically arranged drilling casing is provided on the raised platform.
[0006] As a further improvement of the above technical solution:
[0007] The guardrail is formed by sequentially splicing a plurality of guard piles around the periphery of the elevated platform, and the bottom ends of the guard piles are inserted below the groundwater level of the stratum.
[0008] Adjacent guard piles are staggered and connected.
[0009] The guard piles are steel sheet piles.
[0010] The guard piles are inserted into the stratum at a depth of not less than 10m below the groundwater level.
[0011] The guard piles are arranged vertically.
[0012] The height of the raised platform is not less than 3m above the groundwater level.
[0013] The bottom end of the borehole casing is inserted below the groundwater level of the stratum, and the length of the borehole casing is not less than 5m.
[0014] The base is provided with a clay slurry making pool, a slurry storage pool and a sedimentation pool on the outer side of the elevated platform.
[0015] The elevated platform is square in shape, and a plurality of drilling casings are provided, which are arranged at intervals along the length and width directions of the elevated platform.
[0016] Compared with the prior art, the advantages of the present invention are:
[0017] The utility model relates to a water-collecting stratum drilling construction platform. When drilling, a rotary drilling rig is used to drill downward along the axial direction of the borehole casing. During the drilling process, high-concentration clay mud is injected into the hole. The high-concentration clay mud is used to protect the wall of the drill hole. Fresh mud is added in time during the drilling process, and the mud height in the hole is kept at the hole mouth at all times. This water-collecting stratum drilling construction platform, on the one hand, has a base platform higher than the upper water level of the stratum set on the stratum, which increases the mud liquid level height in the hole during drilling, so that the mud in the hole is always in a positive pressure state from the inside to the outside to the groundwater level. The mud skin formed on the hole wall is always pressed against the hole wall by the difference in internal and external water heads, maintaining the stability of the hole wall and causing the hole wall to collapse inward; on the other hand, a guardrail is set on the periphery of the elevated platform, and the bottom end of the guardrail is inserted below the groundwater level of the stratum, which blocks the groundwater flow from entering the borehole to a certain extent, avoids the disturbance of the hole wall by underground dynamic water, and maintains the stability of the hole wall; thirdly, a vertically arranged drill casing is set on the elevated platform to protect the hole mouth, which can effectively maintain the stability of the hole mouth. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The utility model is a schematic diagram of the structure of the water collection stratum drilling construction platform viewed from above.
[0019] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at A.
[0020] Figure 3 The utility model is a schematic cross-sectional structural diagram of a water-collecting stratum drilling construction platform.
[0021] The numbers in the figure represent:
[0022] 1. Base; 2. Raised platform; 3. Guardrail; 31. Guard piles; 4. Strata; 41. Groundwater level; 5. Drill casing; 6. Clay slurry pool; 7. Slurry storage pool; 8. Sedimentation tank. DETAILED DESCRIPTION
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of 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 constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.
[0026] In this utility model, unless otherwise specified or limited, the terms "assemble," "connect," "connect," "fix," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0027] Figures 1 to 3 An embodiment of a water-collecting stratum drilling construction platform of the utility model is shown. The water-collecting stratum drilling construction platform of this embodiment includes a base 1 arranged on the stratum 4. The top surface of the base 1 is higher than the water level on the stratum 4. A raised platform 2 is provided on the base 1. A guardrail 3 is provided on the periphery of the raised platform 2. The bottom end of the guardrail 3 is inserted below the groundwater level 41 of the stratum 4. A vertically arranged drilling casing 5 is provided on the raised platform 2.
[0028] During drilling, a rotary drilling rig is used to drill downward along the axial direction of the borehole casing 5. During the drilling process, high-concentration clay mud is injected into the hole. The high-concentration clay mud is used to protect the wall of the hole. Fresh mud is added in time during the drilling process, and the mud height in the hole is always kept at the hole mouth. The present water-collecting stratum drilling construction platform, on the one hand, has a base platform 1 which is higher than the water level of the stratum 4, which increases the height of the mud liquid level in the hole during drilling, so that the mud in the hole is always in a positive pressure state from the inside to the outside relative to the groundwater level 41. The mud skin formed on the hole wall is always pressed against the hole wall by the difference in internal and external water heads, maintaining the stability of the hole wall and causing the hole wall to collapse inward; on the other hand, a guardrail 3 is provided on the periphery of the elevated platform 2, and the bottom end of the guardrail 3 is inserted below the groundwater level 41 of the stratum 4, which blocks the groundwater flow from entering the borehole to a certain extent, avoids the disturbance of the hole wall by underground dynamic water, and maintains the stability of the hole wall; thirdly, a vertically arranged drill casing 5 is provided on the elevated platform 2 to protect the hole mouth, which can effectively maintain the stability of the hole mouth.
[0029] Furthermore, in this embodiment, the guardrail 3 is formed by a plurality of guard piles 31, which are sequentially spliced around the perimeter of the raised platform 2. The bottom ends of the guard piles 31 are inserted below the groundwater level 41 of the stratum 4. This simple structure facilitates construction. Specifically, the guard piles 31 are driven in one by one. A vibrating hammer is used to vibrate and sink the guard piles. Every time the guard piles 31 sink approximately 1 to 2 mm, the vibration is stopped and the verticality of the piles is checked. Any deviation is promptly corrected.
[0030] Furthermore, in this embodiment, adjacent guard piles 31 are staggered and connected to improve stability. Of course, in other embodiments, adjacent guard piles 31 can also be aligned and spliced.
[0031] Furthermore, in this embodiment, the guard piles 31 are steel sheet piles. Preferably, the guard piles 31 are inserted into the groundwater level 41 of the stratum 4 to a depth of not less than 10 m.
[0032] Furthermore, in this embodiment, the guard piles 31 are vertically arranged. The height of the raised platform 2 is not less than 3 meters above the groundwater level 41.
[0033] Furthermore, in this embodiment, the bottom end of the borehole casing 5 is inserted below the groundwater level 41 of the stratum 4 , and the length of the borehole casing 5 is not less than 5 m.
[0034] Furthermore, in this embodiment, the base 1 is provided with a clay slurry making tank 6, a slurry storage tank 7 and a sedimentation tank 8 outside the raised platform 2. The clay slurry making tank 6 can be used to make high-concentration clay slurry. The slurry storage tank 7 can be used to store the slurry. The sedimentation tank 8 can be used for submerged filtration. The density of the high-concentration clay slurry is not less than 1.35 g / cm 3 .
[0035] Furthermore, in this embodiment, the elevated platform 2 is square, and a plurality of drilling casings 5 are provided. The drilling casings 5 are arranged at intervals along the length and width directions of the elevated platform 2 .
[0036] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into equivalent embodiments with equivalent variations. Therefore, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the scope of protection of the present invention.
Claims
1. A water-collecting stratum drilling construction platform, characterized by: The invention comprises a base (1) arranged on a stratum (4), wherein the top surface of the base (1) is higher than the water level on the stratum (4), a raised platform (2) is provided on the base (1), a guardrail (3) is provided on the periphery of the raised platform (2), the bottom end of the guardrail (3) is inserted below the groundwater level (41) of the stratum (4), and a vertically arranged drill casing (5) is provided on the raised platform (2).
2. The water-collecting stratum drilling construction platform according to claim 1, characterized in that: The guardrail (3) is formed by a plurality of guard piles (31) sequentially spliced around the periphery of the elevated platform (2), and the bottom ends of the guard piles (31) are inserted below the groundwater level (41) of the stratum (4).
3. The water-collecting stratum drilling construction platform according to claim 2, characterized in that: Adjacent guard piles (31) are staggered and butted.
4. The water-collecting stratum drilling construction platform according to claim 2, characterized in that: The guard piles (31) are steel sheet piles.
5. The water-collecting stratum drilling construction platform according to claim 2, characterized in that: The guard pile (31) is inserted into the groundwater level (41) of the stratum (4) to a depth of not less than 10 m.
6. The water-collecting stratum drilling construction platform according to claim 2, characterized in that: The guard pile (31) is arranged vertically.
7. The water-collecting stratum drilling construction platform according to any one of claims 1 to 6, characterized in that: The height of the elevated platform (2) is not less than 3 m above the groundwater level (41).
8. The water-collecting stratum drilling construction platform according to any one of claims 1 to 6, characterized in that: The bottom end of the borehole casing (5) is inserted below the groundwater level (41) of the stratum (4), and the length of the borehole casing (5) is not less than 5m.
9. The water-collecting stratum drilling construction platform according to any one of claims 1 to 6, characterized in that: The base platform (1) is provided with a clay slurry making pool (6), a slurry storage pool (7) and a sedimentation pool (8) on the outside of the elevated platform (2).
10. The water-collecting stratum drilling construction platform according to any one of claims 1 to 6, characterized in that: The elevated platform (2) is square in shape, and a plurality of drilling casings (5) are provided and arranged at intervals along the length and width directions of the elevated platform (2).