A kind of micro prefabricated pile for electricity

Abstract

The present invention belongs to the field of electric power technology, and discloses a micro prefabricated pile for electric power, which has a pile body and is characterized in that it also has a prefabricated pipe pile, which is located inside the pile body, the upper end of the prefabricated pipe pile extends out of the upper surface of the pile body, and the lower end of the prefabricated pipe pile has a plurality of recessed check valve installation channels near the lower end, each check valve installation channel has a grouting hole, the diameter of the prefabricated pipe pile inside the pile body is greater than the diameter of the prefabricated pipe pile extending out of the upper surface of the pile body, the axis of the prefabricated pipe pile coincides with the axis of the pile body, and the pile body has a reinforcement component, which is composed of a plurality of first reinforcement ribs and a second reinforcement rib, and the prefabricated pipe pile is integrated with the pile body. The present invention has the following main beneficial technical effects: (1) saving material consumption, energy saving and emission reduction; (2) foundation components can be mass-produced; (3) the mechanization degree of power transmission line foundation construction is high, and the construction and maintenance period is short; (4) the earthwork excavation is small, no on-site casting is required, and the compensation fee for young crops is low.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power, and in particular relates to a micro prefabricated pile for electric power. Background Art

[0002] At present, the foundation of the substation is a traditional large excavation concrete foundation and a cast-in-place pile foundation. During use, it is found that the large excavation concrete foundation has the problems of large excavation area, large floor space, great impact on the environment, and cumbersome construction procedures. Before pouring concrete, it is necessary to set up formwork and make cushion layers. The cast-in-place pile foundation is poured on site, with slow construction speed, long cycle, environmental pollution, and difficult to control the quality of the piles. The substation frame foundation is a traditional large excavation concrete foundation. During use, it is found that the large excavation concrete foundation has the problems of large excavation area, large floor space, great impact on the environment, and cumbersome construction procedures. Before pouring concrete, it is necessary to set up formwork and make cushion layers. The anchor bolts are easily displaced and settled, resulting in unsafe excavation and easy collapse. The outer wall of the steel pipe pile foundation in the prior art is smooth. Even if concrete is poured, due to the height and weight of the substation structure and the influence of external factors, it is very easy to cause displacement and settlement of the foundation.

[0003] On the other hand, my country has a vast territory and a huge power transmission line construction project. Due to the equipment, the foundation of the transmission line tower is generally bored and cast-in-place piles. However, the mountainous area of ​​my country accounts for about 2 / 3 of the country's land area. A large number of power transmission lines are routed in the mountains, and their towers are inevitably built on slopes. Due to the steep terrain, complex geological structure and inconvenient transportation where the towers are located, it is very difficult to transport tools and building materials during bored and cast-in-place pile construction. Considering the particularity of power transmission lines in mountainous areas, large-diameter pipe piles and traditional pile sinking methods are used. The construction equipment is huge and it is difficult to adapt to the complex and changeable mountain terrain. At the same time, the amount of concrete and steel bars used in the on-site pile sinking is large, the construction period is long, the construction cost of the tower foundation is high, and the protection damage is serious.

[0004] To this end, the industry urgently needs to solve the corresponding technical problems. Summary of the invention

[0005] To solve the above problems, the purpose of the present invention is to disclose a micro prefabricated pile for electricity, which is achieved by adopting the following technical solution.

[0006] A micro prefabricated pile for electric power has a pile body, characterized in that it also has a prefabricated pipe pile, the prefabricated pipe pile is located inside the pile body, the upper end of the prefabricated pipe pile extends out of the upper surface of the pile body, a plurality of recessed check valve installation channels are provided near the lower end of the prefabricated pipe pile, each check valve installation channel has a grouting hole, the diameter of the prefabricated pipe pile inside the pile body is larger than the diameter of the prefabricated pipe pile extending out of the upper surface of the pile body, the axis of the prefabricated pipe pile coincides with the axis of the pile body, a reinforcing component is provided inside the pile body, the reinforcing component is composed of a plurality of first reinforcing ribs and second reinforcing ribs, the axes of all the first reinforcing ribs are distributed on the same cylindrical surface, the second reinforcing ribs fix the first reinforcing ribs, or the second reinforcing ribs are fixed to the first reinforcing ribs by a bundling component, the second reinforcing ribs are perpendicular to the first reinforcing ribs, or the second reinforcing ribs spirally cover / limit the first reinforcing ribs; the prefabricated pipe pile and the pile body are combined into one.

[0007] The above-mentioned prefabricated micro pile for electricity is characterized in that the diameter of the pile body is 200-400mm.

[0008] The above-mentioned prefabricated micro pile for electricity is characterized in that the shear bearing capacity of the pile body is 30-50kN.

[0009] The above-mentioned prefabricated micro pile for electric power is characterized in that the axial tensile bearing capacity of the pile body is 150-180kN.

[0010] The above-mentioned prefabricated micro pile for electricity is characterized in that the axial compressive bearing capacity of the pile body is 500-650kN.

[0011] The above-mentioned prefabricated micro pile for electric power is characterized in that it is made by the following method:

[0012] Step 1: placing a reinforcing component, which is composed of a plurality of first reinforcing ribs and second reinforcing ribs, wherein the axes of all the first reinforcing ribs are distributed on the same cylindrical surface, the second reinforcing ribs fix the first reinforcing ribs, or the second reinforcing ribs are fixed to the first reinforcing ribs by a tying component, the second reinforcing ribs are perpendicular to the first reinforcing ribs, or the second reinforcing ribs spirally cover / limit the first reinforcing ribs;

[0013] Step 2: Place the outer shell, placing the outer shell outside the reinforcement component;

[0014] Step 3: Place the inner shell, place the inner shell inside the reinforcement component, and keep the inner shell and the outer shell in fixed position;

[0015] Step 4: Place the barrier body near the lower end of the outer shell and insert it near the reinforcement component;

[0016] Step 5: Place the introduction body, insert it into the middle of the barrier body and pass through the inner shell;

[0017] Step 6: First injection of cement slurry, inject cement slurry between the inner shell and the outer shell and compact it, remove the inner shell and the outer shell after solidification, and form a pile body. A grouting cavity is formed inside the pile body, and a check valve installation channel and grouting holes are formed on the lower surface of the pile body;

[0018] Step 7: Place the prefabricated pipe pile, take the prefabricated pipe pile and place it into the grouting cavity from above, so that the prefabricated pipe pile and the inner wall of the pile body maintain a relatively fixed position, and the upper end of the prefabricated pipe pile extends out of the upper surface of the pile body;

[0019] Step 8: Inject cement slurry for the second time, install the check valve in the check valve installation channel, connect the slurry outlet pipe of the cement slurry injection machine to the inlet of the check valve, connect the outlet of the check valve to the grouting hole, and continuously inject cement slurry. The cement slurry continuously flows upward in the grouting cavity until the grouting cavity is filled, the check valve is closed, solidified, and the manufacture of micro prefabricated piles for electricity is completed.

[0020] The above-mentioned micro prefabricated pile for power use is characterized in that the pressure of the cement slurry at the beginning of the second cement slurry injection is 3.8-4.2MPa, and the pressure of the cement slurry injection after the check valve is opened is 0.9-1.1MPa.

[0021] The above-mentioned micro prefabricated pile for power use is characterized in that the cement slurry is composed of water, cement, expansion agent and water reducing agent in a weight ratio of 0.55:1.0:0.12:0.01.

[0022] The present invention has the following major beneficial technical effects: (1) saving the amount of concrete, steel and the like, and achieving energy conservation and emission reduction; (2) realizing factory prefabrication of foundation components, thereby improving the construction quality of foundation projects; (3) improving the degree of mechanization of power transmission line foundation construction, thereby greatly shortening the construction and maintenance period of foundations; (4) reducing earth excavation and eliminating the need for on-site concrete pouring, thereby greatly reducing the cost of compensation for young crops and achieving outstanding environmental protection effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of a section of a reinforcement component used internally.

[0025] In the figure: 1 - pile body, 2 - prefabricated pipe pile, 11 - installation channel of check valve, 12 - grouting hole, 13 - first reinforcement rib, 14 - second reinforcement rib. DETAILED DESCRIPTION

[0026] A micro prefabricated pile for electric power, comprising a pile body 1, characterized in that it also comprises a prefabricated pipe pile 2, wherein the prefabricated pipe pile 2 is located inside the pile body 1, the upper end of the prefabricated pipe pile 2 extends out of the upper surface of the pile body 1, a plurality of recessed check valve installation channels 11 are provided near the lower end of the prefabricated pipe pile 2, each check valve installation channel has a grouting hole 12, the diameter of the prefabricated pipe pile 2 inside the pile body 1 is greater than the diameter of the prefabricated pipe pile 2 extending out of the upper surface of the pile body 1, the axis of the prefabricated pipe pile 2 coincides with the axis of the pile body 1, and the pile body 1 has a reinforcing component, which is composed of a plurality of first reinforcing ribs 13 and second reinforcing ribs 14, the axes of all the first reinforcing ribs 13 are distributed on the same cylindrical surface, the second reinforcing ribs 14 fix the first reinforcing ribs 13, or the second reinforcing ribs 14 and the first reinforcing ribs 13 are fixed by a tying component, the second reinforcing ribs 14 are perpendicular to the first reinforcing ribs 13, or the second reinforcing ribs 14 spirally cover / limit the first reinforcing ribs 13; the prefabricated pipe pile 2 is combined with the pile body 1 as a whole.

[0027] The above-mentioned prefabricated micro pile for electricity is characterized in that the diameter of the pile body is 200-400mm.

[0028] The above-mentioned prefabricated micro pile for electricity is characterized in that the shear bearing capacity of the pile body is 30-50kN.

[0029] The above-mentioned prefabricated micro pile for electric power is characterized in that the axial tensile bearing capacity of the pile body is 150-180kN.

[0030] The above-mentioned prefabricated micro pile for electricity is characterized in that the axial compressive bearing capacity of the pile body is 500-650kN.

[0031] The above-mentioned prefabricated micro pile for electric power is characterized in that it is made by the following method:

[0032] Step 1: placing a reinforcing component, the reinforcing component is composed of a plurality of first reinforcing ribs and second reinforcing ribs, the axes of all the first reinforcing ribs are distributed on the same cylindrical surface, the second reinforcing ribs fix the first reinforcing ribs, or the second reinforcing ribs are fixed to the first reinforcing ribs by a tying component, the second reinforcing ribs are perpendicular to the first reinforcing ribs 13, or the second reinforcing ribs spirally cover / limit the first reinforcing ribs;

[0033] Step 2: Place the outer shell, placing the outer shell outside the reinforcement component;

[0034] Step 3: Place the inner shell, place the inner shell inside the reinforcement component, and keep the inner shell and the outer shell in fixed position;

[0035] Step 4: Place the barrier body near the lower end of the outer shell and insert it near the reinforcement component;

[0036] Step 5: Place the introduction body, insert it into the middle of the barrier body and pass through the inner shell;

[0037] Step 6: First injection of cement slurry, inject cement slurry between the inner shell and the outer shell and compact it, remove the inner shell and the outer shell after solidification, and form a pile body. A grouting cavity is formed inside the pile body, and a check valve installation channel and grouting holes are formed on the lower surface of the pile body;

[0038] Step 7: Place the prefabricated pipe pile, take the prefabricated pipe pile and place it into the grouting cavity from above, so that the prefabricated pipe pile and the inner wall of the pile body maintain a relatively fixed position, and the upper end of the prefabricated pipe pile extends out of the upper surface of the pile body;

[0039] Step 8: Inject cement slurry for the second time, install the check valve in the check valve installation channel, connect the slurry outlet pipe of the cement slurry injection machine to the inlet of the check valve, connect the outlet of the check valve to the grouting hole, and continuously inject cement slurry. The cement slurry continuously flows upward in the grouting cavity until the grouting cavity is filled, the check valve is closed, solidified, and the manufacture of micro prefabricated piles for electricity is completed.

[0040] The above-mentioned micro prefabricated pile for power use is characterized in that the pressure of the cement slurry at the beginning of the second cement slurry injection is 3.8-4.2MPa, and the pressure of the cement slurry injection after the check valve is opened is 0.9-1.1MPa.

[0041] The above-mentioned prefabricated micro pile for electric power is characterized in that the cement slurry consists of water, cement, expansion agent and water reducing agent.

[0042] The above-mentioned micro prefabricated pile for electricity is characterized in that the weight ratio of water, cement, expansion agent and water reducing agent in the cement slurry is: 0.55:1.0:0.12:0.01.

[0043] The above-mentioned prefabricated micro pile for electricity is characterized in that the material of the reinforcing component is preferably steel.

[0044] The cement of the above-mentioned prefabricated micro pile for electric power is common cement without special requirements; the expansion agent and water reducing agent are common ones in the field of concrete technology without special requirements.

[0045] During the construction of this application, a hole is first drilled with a machine, and then a platform is poured after the surface is leveled. The application is inserted into the hole through the platform hole, with the upper end of the pile body on top, and the upper end of the prefabricated pipe pile is fixed on the platform. Then the tower is fixed on the platform and fixed to the upper end of the prefabricated pipe pile to form an integrated structure. Since this application goes deep underground for a long time, generally a few meters to 20 meters, it is quite safe and reliable.

[0046] The present invention has the following major beneficial technical effects: (1) saving the amount of concrete, steel and the like, and achieving energy conservation and emission reduction; (2) realizing factory prefabrication of foundation components, thereby improving the construction quality of foundation projects; (3) improving the degree of mechanization of power transmission line foundation construction, thereby greatly shortening the construction and maintenance period of foundations; (4) reducing earth excavation and eliminating the need for on-site concrete pouring, thereby greatly reducing the cost of compensation for young crops and achieving outstanding environmental protection effects.

[0047] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the invention, the present invention may be subject to various changes and improvements, which fall within the scope of the invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A prefabricated micro pile for power, comprising a pile body (1), characterized in that The invention also comprises a prefabricated pipe pile (2), the prefabricated pipe pile (2) being located inside the pile body (1), the upper end of the prefabricated pipe pile (2) extending out of the upper surface of the pile body (1), a plurality of recessed check valve installation channels (11) being provided near the lower end of the prefabricated pipe pile (2), each check valve installation channel being provided with a grouting hole (12), the diameter of the prefabricated pipe pile (2) inside the pile body (1) being larger than the diameter of the prefabricated pipe pile (2) extending out of the upper surface of the pile body (1), the axis of the prefabricated pipe pile (2) being coincident with the axis of the pile body (1), and the pile body (1) being provided with a reinforcement component. The reinforcing component is composed of a plurality of first reinforcing ribs (13) and second reinforcing ribs (14), the axes of all the first reinforcing ribs (13) are distributed on the same cylindrical surface, the second reinforcing ribs (14) fix the first reinforcing ribs (13), or the second reinforcing ribs (14) and the first reinforcing ribs (13) are fixed by a tying component, the second reinforcing ribs (14) are perpendicular to the first reinforcing ribs (13), or the second reinforcing ribs (14) spirally cover / limit the first reinforcing ribs (13); the prefabricated pipe pile (2) and the pile body (1) are combined into one body; The micro prefabricated pile for electricity is made by the following method: Step 1: placing a reinforcing component, which is composed of a plurality of first reinforcing ribs and second reinforcing ribs, wherein the axes of all the first reinforcing ribs are distributed on the same cylindrical surface, the second reinforcing ribs fix the first reinforcing ribs, or the second reinforcing ribs are fixed to the first reinforcing ribs by a tying component, the second reinforcing ribs are perpendicular to the first reinforcing ribs, or the second reinforcing ribs spirally cover / limit the first reinforcing ribs; Step 2: Place the outer shell, placing the outer shell outside the reinforcement component; Step 3: Place the inner shell, place the inner shell inside the reinforcement component, and keep the inner shell and the outer shell in fixed position; Step 4: Place the barrier body near the lower end of the outer shell and insert it near the reinforcement component; Step 5: Place the introduction body, insert it into the middle of the barrier body and pass through the inner shell; Step 6: First injection of cement slurry, inject cement slurry between the inner shell and the outer shell and compact it, remove the inner shell and the outer shell after solidification, and form a pile body. A grouting cavity is formed inside the pile body, and a check valve installation channel and grouting holes are formed on the lower surface of the pile body; Step 7: Place the prefabricated pipe pile, take the prefabricated pipe pile and place it into the grouting cavity from above, so that the prefabricated pipe pile and the inner wall of the pile body maintain a relatively fixed position, and the upper end of the prefabricated pipe pile extends out of the upper surface of the pile body; Step 8: Inject cement slurry for the second time, install the check valve in the check valve installation channel, connect the slurry outlet pipe of the cement slurry injection machine to the inlet of the check valve, connect the outlet of the check valve to the grouting hole, and continuously inject cement slurry. The cement slurry continuously flows upward in the grouting cavity until the grouting cavity is filled, the check valve is closed, solidified, and the manufacture of micro prefabricated piles for electricity is completed.

2. A prefabricated micro pile for electric power according to claim 1, characterized in that The diameter of the pile body is 200-400mm.

3. The micro prefabricated pile for electric power according to claim 1, characterized in that The shear bearing capacity of the pile body is 30-50kN.

4. The micro prefabricated pile for electric power according to claim 1, characterized in that The axial tensile bearing capacity of the pile body is 150-180kN.

5. The micro prefabricated pile for electric power according to claim 1, characterized in that The axial compressive bearing capacity of the pile body is 500-650kN.

6. The micro prefabricated pile for electric power according to claim 5, characterized in that The pressure of cement slurry at the beginning of the second cement slurry injection is 3.8-4.2MPa, and the pressure of cement slurry after the check valve is flushed open is 0.9-1.1MPa.

7. The micro prefabricated pile for electric power according to claim 6, characterized in that Cement slurry is composed of water, cement, expansion agent and water reducing agent.

8. The micro prefabricated pile for electric power according to claim 7, characterized in that The weight ratio of water, cement, expansion agent and water reducing agent in cement slurry is: 0.55：1.0：0.12：0.01。 9. The micro prefabricated pile for electric power according to claim 8, characterized in that The material of the reinforcing member is steel.

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