Combined spiral blade internal grouting type steel pipe pile for pipeline support

Abstract

The utility model discloses a combined spiral blade internal grouting type steel pipe pile for a pipeline support, which comprises a steel pipe pile, the steel pipe pile is composed of an equal-diameter pile body and a variable-diameter drill bit, the equal-diameter pile body is of a hollow structure, the variable-diameter drill bit is arranged at the pipe end of the equal-diameter pile body, and the diameter of the variable-diameter drill bit is larger than that of the equal-diameter pile body. The outer wall of the equal-diameter pile body and the outer wall of the variable-diameter drill bit are fixedly connected with continuous spiral blades, and the outer wall of the equal-diameter pile body is further fixedly connected with a plurality of separated spiral blades. The steel pipe pile is suitable for lower-layer mucky soil through the arranged separated spiral blades, the drilling sinking rate is convenient to control, the application range of the steel pipe pile is wider, the diameter pile body is provided with the thickened area, the thickened area is provided with the reserved bolt holes, the steel pipe pile becomes a flexible open type node, and a steel pipeline support can be additionally arranged; and a reinforced concrete column pipeline support can also be poured through joint bars.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline supports, in particular to a combined spiral blade internal grouting type steel pipe pile for pipeline supports. Background Technique

[0002] During the pipeline laying process, when encountering areas such as ditches, depressions, ponds, rivers, shoals, slopes and silt foundations, and when it is impossible to avoid on the line, due to the limitations of the self-bearing capacity of the pipeline and the geological conditions, it is necessary to set up support frames and piers to cross the depressions or carry out foundation treatment to keep the pipeline stable.

[0003] The setting of traditional support frames or piers inevitably requires the use of cast-in-place concrete components (foundations or columns). For geological environments with poor soil conditions such as shoals and silt foundations, pile foundations are also required. Traditional reinforced concrete construction has a large working surface, a long construction period, poor economy, and has a greater impact on road traffic, the surrounding environment and the structural stability of surrounding buildings and structures. For some pipe clamp constructions, on-site welding is also required, increasing the types of operating jobs and connecting the power supply, increasing the potential safety hazard of electric shock.

[0004] For traditional pile foundations, whether it is drilling or driving (pressing) construction, large machinery is required. During the construction process, the vibration is large, the surrounding soil is severely disturbed, the soil body is easily deformed, affecting the structural stability of surrounding buildings and structures. At the same time, the noise, mud, etc. generated during construction cause serious pollution to the surrounding environment, and the entire construction process has complex technology and a long cycle.

[0005] In narrow sites adjacent to residential houses or pond river dams, the construction working surface is limited and large machinery cannot enter the site. Due to various objective factors, the construction of pipeline laying piers cannot build cofferdams or drain and lower the water level, resulting in the difficulty of implementing conventional construction plans and the inability to carry out the laying project normally. Therefore, how to solve the pipeline support problem conveniently, quickly and economically has been a problem studied in the implementation of pipeline projects. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a combined spiral blade internal grouting type steel pipe pile for pipeline supports to solve the deficiencies in the background technique.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions:

[0008] A combined spiral blade internal grouting type steel pipe pile for pipeline supports, comprising a steel pipe pile. The steel pipe pile consists of a constant-diameter pile body and a reduced-diameter drill bit. The constant-diameter pile body is of a hollow structure, and the reduced-diameter drill bit is arranged at the pipe end of the constant-diameter pile body. Continuous spiral blades are fixedly connected to the outer walls of the constant-diameter pile body and the reduced-diameter drill bit. Multiple separated spiral blades are also fixedly connected to the outer wall of the constant-diameter pile body. An internal steel reinforcement cage is connected inside the constant-diameter pile body, and a filler is also poured inside the constant-diameter pile body.

[0009] Preferably, the internal steel reinforcement cage includes multiple full-length steel bars, which are equally spaced along the circumferential direction of the constant-diameter pile body. The full-length steel bars are of the same length as the constant-diameter pile body. One end of the full-length steel bar is fixedly connected to the pipe end of the constant-diameter pile body, and the other end is fixedly connected to the pipe orifice of the constant-diameter pile body.

[0010] Preferably, the internal steel reinforcement cage further includes a first cross-bar body and a second cross-bar body, both of which are fixedly connected between multiple full-length steel bars. The first cross-bar body and the second cross-bar body are equally spaced and alternately distributed along the length direction of the full-length steel bars.

[0011] Preferably, the filler is C25 slightly expanded fine aggregate concrete.

[0012] Preferably, the continuous spiral blade extends from the constant-diameter pile body to the reduced-diameter drill bit.

[0013] Preferably, a thickened area is provided at the pipe orifice end of the constant-diameter pile body, and a number of reserved bolt holes are opened in the thickened area.

[0014] Preferably, the diameter of the separated spiral blade is larger than that of the continuous spiral blade.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) In the present utility model, the continuous spiral blades provided on the constant-diameter pile body and the reduced-diameter drill bit facilitate the drilling of the surface hard soil layer. By providing the separated spiral blades, it is applicable to the lower layer of silty soil and is convenient for controlling the drilling and sinking rate, making the steel pipe pile have a wider application range. By setting a thickened area on the diameter pile body and opening reserved bolt holes in the thickened area, it becomes a flexible and open-type node, which can either be provided with a steel pipeline support, or be inserted with steel bars to pour a reinforced concrete column pipeline support, or a combination of the two methods can be used to support the pipeline. In pipeline support, the steel pipe pile can firmly fix the pipeline in the required position by cooperating with the supporting pipeline bracket, preventing the movement and vibration of the pipeline, enabling the assembly construction of the pipeline support frame, improving the construction efficiency, and achieving the purposes of cost reduction, efficiency increase, green environmental protection, low carbon and energy conservation.

[0017] (2) The utility model improves the structural strength through the built-in steel reinforcement cage composed of the full-length reinforcement bars, the first cross-reinforcement body and the second cross-reinforcement body connected inside the steel pipe pile, and pours C25 slightly expanded fine aggregate concrete into the steel pipe pile to firmly combine the built-in steel reinforcement cage with the equal-diameter pile body, further improving the structural strength of the steel pipe pile. It has high bearing capacity and anti-deformation ability, can effectively resist the weight of the pipeline system and other external forces, can provide stable support for the pipeline, and ensure the safety and stability of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the combined spiral blade internal grouting type steel pipe pile for pipeline support;

[0019] Figure 2 It is a sectional view taken along line A-A;

[0020] Figure 3 It is a sectional view taken along line B-B;

[0021] Figure 4 It is a schematic diagram of the distribution structure of the built-in steel reinforcement cage inside the equal-diameter pile body.

[0022] In the figure: 1. Steel pipe pile; 11. Equal-diameter pile body; 12. Reducing drill bit; 13. Thickening area; 14. Reserved bolt hole; 2. Continuous spiral blade; 3. Split spiral blade; 4. Full-length reinforcement bar; 5. First cross-reinforcement body; 6. Second cross-reinforcement body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment:

[0025] Please refer to Figures 1-4, this embodiment provides a combined spiral blade internal grouting type steel pipe pile for pipeline supports, including a steel pipe pile 1. The steel pipe pile 1 consists of an equal-diameter pile body 11 and a variable-diameter drill bit 12. The variable-diameter drill bit 12 is integrally formed with the equal-diameter pile body 11. The equal-diameter pile body 11 is a hollow structure. The variable-diameter drill bit 12 is arranged at the pipe end of the equal-diameter pile body 11. A continuous spiral blade 2 is fixedly connected to the outer walls of the equal-diameter pile body 11 and the variable-diameter drill bit 12. The continuous spiral blade 2 is fixedly welded to the equal-diameter pile body 11 and the variable-diameter drill bit 12. The continuous spiral blade 2 extends from the equal-diameter pile body 11 to the variable-diameter drill bit 12. A plurality of separated spiral blades 3 are also fixedly connected to the outer wall of the equal-diameter pile body 11. The separated spiral blades 3 are fixedly welded to the equal-diameter pile body 11. The diameter of the separated spiral blades 3 is larger than that of the continuous spiral blade 2. An internal steel reinforcement cage is connected inside the equal-diameter pile body 11. The continuous spiral blade 2 provided on the equal-diameter pile body 11 and the variable-diameter drill bit 12 facilitates the drilling of the surface hard soil layer. By providing the separated spiral blades 3, it is suitable for the underlying silty soil layer, facilitating the control of the drilling and sinking rate, making the steel pipe pile applicable to a wider range. There is no traditional pile driving noise or vibration, no need for excavation, no construction waste, no need for retaining wall and drainage in the sand, suitable for expansive soil, collapsible loess, frozen soil areas, suitable for the area with soft soil on the surface and hard soil deep down (soft on the top and hard on the bottom), with low requirements for space and site (indoors, ponds, slopes, remote areas), no cement pile curing stage, the temporary support can be reused, less affected by the climate, and normal construction operations can be carried out under low temperature and severe cold, having greater economic advantages.

[0026] In this embodiment, as Figure 2 , Figure 3 and Figure 4 shown, the internal steel reinforcement cage includes a plurality of full-length steel bars 4. The full-length steel bars 4 are grade III steel bars with a diameter of 8 mm. The full-length steel bars 4 are equally spaced along the circumferential direction of the equal-diameter pile body 11. The full-length steel bars 4 are as long as the equal-diameter pile body 11. One end of the full-length steel bars 4 is fixedly connected to the pipe end of the equal-diameter pile body 11, and the other end is fixedly connected to the pipe orifice of the equal-diameter pile body 11. The internal steel reinforcement cage also includes a first cross-bar body 5 and a second cross-bar body 6. Both the first cross-bar body 5 and the second cross-bar body 6 are fixedly connected between the plurality of full-length steel bars 4. The first cross-bar body 5 and the second cross-bar body 6 are equally spaced and alternately distributed along the length direction of the full-length steel bars 4. Among them, when the full-length steel bars 4 are preferably eight in number, the first cross-bar body 5 can be connected between four of the full-length steel bars 4 that are staggered and spaced apart, and the second cross-bar body 6 is connected between the other four staggered and spaced apart full-length steel bars 4. The internal steel reinforcement cage composed of the full-length steel bars 4, the first cross-bar body 5, and the second cross-bar body 6 improves the structural strength of the steel pipe pile.

[0027] In this embodiment, the equal-diameter pile body 11 is also filled with a filler, which is C25 slightly expanded fine aggregate concrete. C25 slightly expanded fine aggregate concrete is a special concrete with an expansion agent added on the basis of ordinary fine aggregate concrete. It has good crack resistance while having lightweight characteristics, combines the built-in steel reinforcement cage with the equal-diameter pile body 11 firmly, further improves the structural strength of the steel pipe pile, has high bearing capacity and anti-deformation ability, and can effectively resist the weight and other external forces from the pipeline system.

[0028] In this embodiment, as Figure 1 shown, the pipe orifice end of the equal-diameter pile body 11 is provided with a thickening area 13, and a number of reserved bolt holes 14 are opened at the thickening area 13, making the thickening area 13 of the equal-diameter pile body 11 a flexible and open-type node. Steel pipe supports can be added, or steel bars can be inserted to pour reinforced concrete column pipe supports, or a combination of the two methods can be used to support the pipeline. In pipeline support, by using the steel pipe pile in cooperation with the supporting pipeline bracket, the pipeline can be firmly fixed in the required position, preventing the movement and vibration of the pipeline.

[0029] Working principle: During use, the two first specimen templates 2 and the second specimen template 3 are combined to form a specimen mold, and the two insertion rods 23 of the L-shaped connecting plate 24 are respectively inserted into the corresponding insertion sleeves 22 of the first specimen template 2 and the second specimen template 3 to firmly connect the first specimen template 2 and the second specimen template 3. Then, cement mortar is poured into the specimen mold. After the cement mortar specimen solidifies, the driving rod 14 is rotated by turning the handwheel 16. The driving rod 14 drives the second bevel gear 13 to rotate, the second bevel gear 13 drives the engaged first bevel gear 12 to rotate, the first bevel gear 12 drives the threaded sleeve 7 to rotate, so that the threaded rod 8 axially moves upward in the threaded sleeve 7. The threaded rod 8 jacks up the top plate 18. At the same time, the connecting seat 9 moves upward synchronously with the threaded rod 8, changing the supporting angle of the linkage rod 10, and pushing the first specimen template 2 and the second specimen template 3 towards the edge of the workbench 1, so that the first specimen template 2 and the second specimen template 3 are quickly separated from the cement mortar specimen, for the rapid demolding of the cement mortar specimen, improving the demolding effect and ensuring the integrity of the cement mortar specimen.

[0030] The above embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A combined spiral blade internal grouting steel pipe pile for a pipeline support, characterized in that: The invention comprises a steel pipe pile (1), wherein the steel pipe pile (1) is composed of a pile body of equal diameter (11) and a variable diameter drill bit (12), wherein the pile body of equal diameter (11) is a hollow structure, the variable diameter drill bit (12) is arranged at the pipe end of the pile body of equal diameter (11), a continuous spiral blade (2) is fixedly connected to the outer wall of the pile body of equal diameter (11) and the variable diameter drill bit (12), a plurality of separate spiral blades (3) are also fixedly connected to the outer wall of the pile body of equal diameter (11), a built-in steel cage is connected inside the pile body of equal diameter (11), and a filler is also poured inside the pile body of equal diameter (11).

2. The combined spiral blade internal grouting steel pipe pile for a pipeline support according to claim 1, characterized in that: The built-in steel cage comprises a plurality of through-length bars (4), the through-length bars (4) being distributed at equal intervals along the circumferential direction of the equal-diameter pile body (11), the through-length bars (4) being equal in length to the equal-diameter pile body (11), one end of the through-length bars (4) being fixedly connected to the pipe end of the equal-diameter pile body (11), and the other end being fixedly connected to the pipe mouth of the equal-diameter pile body (11).

3. The combined spiral blade internal grouting steel pipe pile for a pipeline support according to claim 2, characterized in that: The built-in steel reinforcement cage further comprises a first cross reinforcement body (5) and a second cross reinforcement body (6), wherein the first cross reinforcement body (5) and the second cross reinforcement body (6) are both fixedly connected between a plurality of continuous reinforcements (4), and the first cross reinforcement body (5) and the second cross reinforcement body (6) are alternately distributed at equal intervals along the length direction of the continuous reinforcement (4).

4. The combined spiral blade internal grouting steel pipe pile for a pipeline support according to claim 1, characterized in that: The filler is C25 slightly expanded fine stone concrete.

5. The combined spiral blade internal grouting steel pipe pile for a pipeline support according to claim 1, characterized in that: The continuous spiral blade (2) extends from a pile body (11) of constant diameter to a variable diameter drill bit (12).

6. The combined spiral blade internal grouting steel pipe pile for a pipeline support according to claim 1, characterized in that: The pipe mouth end of the pile body (11) of equal diameter is provided with a thickened area (13), and a plurality of reserved bolt holes (14) are opened in the thickened area (13).

7. The combined spiral blade internal grouting steel pipe pile for a pipeline support according to claim 1, characterized in that: The diameter of the separated spiral blade (3) is greater than the diameter of the continuous spiral blade (2).

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