Vacuum well-point dewatering dry-method drilling pipe inserting device

Abstract

A vacuum well point dewatering dry method drilling pipe inserting device comprises a hollow drill rod, a plugging hammer is rotatably installed at the lower end of the hollow drill rod, and the plugging hammer plugs the hollow drill rod in a horizontal state; when the plugging hammer is in a vertical state, the lower end opening of the hollow drill rod is opened; a pipe inserting hole is formed in the side wall of the upper end of the hollow drill rod, and a well point pipe is fed into the hollow drill rod through the pipe inserting hole. According to the vacuum well-point dewatering dry-method drilling and pipe inserting device, drilling and pipe inserting are completed at a time, the well-point pipe embedding time is greatly shortened, and meanwhile it is guaranteed that a construction site is dry.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of burying construction of vacuum well point pipe, especially to a vacuum well point dewatering dry drilling pipe inserting device construction method. BACKGROUND

[0002] The traditional vacuum well point pipe burying can directly use high-pressure water to flush the well point pipe, or use the flushing pipe to flush the hole and then sink the well point pipe into the hole, or use the water flushing method with casing or the vibration water flushing method to sink the pipe. The above methods have the following disadvantages:

[0003] 1) A large amount of accumulated water is formed in the water flushing hole process at the construction site, which requires excavation of drainage ditches or other drainage measures to increase the drainage construction measures. At the same time, the accumulated water infiltration at the construction site causes the underground water level to rise, which affects the dewatering efficiency.

[0004] 2) The foundation of the dewatering site contains a large amount of hard materials such as stones and construction waste, which cannot be water flushed to bury the well point pipe, and the well point pipe needs to be buried by excavation, which damages the stability of the original foundation soil and increases the construction cost.

[0005] 3) The well point pipe is buried by solid drill rod drilling or water flushing, which can easily cause hole collapse or hole backfilling if the foundation soil quality of the construction site is poor, the well point pipe cannot be inserted, and secondary flushing or drilling treatment is required, which increases the construction cost and affects the pipe insertion efficiency. SUMMARY

[0006] The technical problem to be solved by the utility model is to provide a vacuum well point dewatering dry drilling pipe inserting device construction method, which completes drilling and pipe insertion at one time, greatly shortens the well point pipe burying time, and ensures the dryness of the construction site.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A vacuum well point dewatering dry drilling pipe inserting device, comprising a hollow drill rod, a plugging hammer rotatably installed at the lower end of the hollow drill rod, the plugging hammer plugging the hollow drill rod in the horizontal state, and the plugging hammer opening the lower end opening of the hollow drill rod in the vertical state; a pipe insertion hole is opened in the sidewall of the upper end of the hollow drill rod, and the well point pipe is sent into the hollow drill rod through the pipe insertion hole.

[0009] The upper end of the hollow drill rod is fixed with a clamping plate connected with a driving and pulling machine.

[0010] The hollow drill rod is a seamless steel pipe with a wall thickness greater than 10 mm.

[0011] The inner diameter of the hollow drill rod is 3-5 times the inner diameter of the well point pipe.

[0012] The length of the hollow drill rod is 0.8m-1m longer than the length of the well point pipe.

[0013] The blanking hammer adopts a solid steel column, a through hole is arranged on one side of the blanking hammer, an ear plate with a hole is welded at the bottom of the corresponding hollow drill rod, and a bolt passes through the ear plate with a hole, the blanking hammer and then is limited by a nut.

[0014] The insertion pipe hole is arranged at the upper portion of the hollow drill rod, and the distance from the insertion pipe hole to the bottom of the hollow drill rod is 20cm-40cm longer than the length of the well point pipe.

[0015] The vacuum well point dewatering dry drilling insertion pipe device has the following technical effects:

[0016] 1) The hollow drill rod is used for drilling, a sheath is formed by using the hollow drill rod, the well point pipe enters the hollow drill rod through the insertion pipe hole and moves downward to the bottom of the drilling hole, and the well point pipe is left in the soil layer after the hollow drill rod is pulled out, so that the smooth embedding of the well point pipe is ensured.

[0017] 2) Compared with the traditional high-pressure water flushing, the insertion pipe hole is punched, and then the well point pipe is sunk into the hole or the solid drill rod is used for drilling, and then the well point pipe is inserted, the secondary punching or drilling is not needed, the construction cost is reduced, and the insertion pipe efficiency is improved.

[0018] 3) The blanking hammer is hinged at the bottom, so that the soil body is prevented from blocking the hollow drill rod in the drilling process; after the drilling is in place, the blanking hammer is naturally perpendicular, the bottom opening of the hollow drill rod is opened, the well point pipe is conveniently passed through the bottom of the hollow drill rod, and falls into the drilling hole.

[0019] 4) CN201710149752-dry construction well point pipe embedding method and special well point pipe assembly, compared with the comparative document 1, the bottom is provided with a rotatable blanking hammer, so that the soil body does not enter the hollow drill rod during drilling, the punching and insertion pipe are completed at one time, the construction speed is fast, the process is simple, the auxiliary consumables are few, the construction machinery is single, the construction cost is less, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described in connection with the drawings and embodiments:

[0021] Figure 1 It is a schematic view of the hollow drill rod in the utility model.

[0022] Figure 2 It is Figure 1 It is a sectional view of the insertion pipe hole.

[0023] Figure 3 It is a schematic view of the blanking hammer in the utility model (blanking state).

[0024] Figure 4The utility model discloses a schematic diagram (open state) of the plugging hammer.

[0025] Figure 5 The utility model discloses a working schematic diagram.

[0026] In the drawing: hollow drill rod 1, plugging hammer 2, clamping plate 3, pipe inserting hole 4, bolt 5, driving and pulling machine 6, ear plate 7, well point pipe 8. DETAILED DESCRIPTION

[0027] As Figures 1-3 The utility model discloses a vacuum well point dewatering dry method pipe inserting device, including hollow drill rod 1, the lower end of hollow drill rod 1 is installed with plugging hammer 2, the top of hollow drill rod 1 is installed with clamping plate 3, and the lateral wall of hollow drill rod 1 is provided with pipe inserting hole 4.

[0028] The hollow drill rod 1 is used for drilling and inserting the well point pipe from the pipe. The length of the hollow drill rod 1 is preferably 0.8-1m longer than the length of the well point pipe required by the design. The inner diameter of the hollow drill rod 1 is 3-5 times the inner diameter of the well point pipe. The inner diameter of the hollow drill rod 1 is so set to ensure the smooth insertion of the well point pipe into the bottom of the hollow drill rod, and to prevent the well point pipe from being pulled out when the hollow drill rod is pulled out. The hollow drill rod 1 is made of a seamless steel pipe, and the wall thickness of the steel pipe is greater than 10mm.

[0029] For example, the hollow drill rod 1 in the A project is made of a seamless steel pipe with a length of 6.8m, an outer diameter of DN120mm, an inner diameter of DN90mm and a wall thickness of 15mm. In this project, the outer diameter of the well point pipe is 32mm.

[0030] The plugging hammer 2 is used to close the bottom end of the hollow drill rod during the drilling process to prevent soil from entering the hollow drill rod. After the drilling is completed, the hollow drill rod is drilled to the bottom of the hole and then pulled up by 10-20cm. At this time, the plugging hammer is opened by using the friction force in the hole, and finally the well point pipe is inserted through the pipe inserting hole of the hollow drill rod.

[0031] The plugging hammer 2 is made of a solid steel column, and the size is adjusted according to the diameter of the hollow drill rod. The diameter of the solid steel column is equal to the inner diameter of the hollow drill rod 1. For example, the diameter of the steel column of the plugging hammer 2 in the A project is DN90mm, and the length is 120mm. The outer lateral wall of the hollow drill rod 1 is welded with an ear plate 7 with a hole, and the bolt 5 passes through the through hole of the plugging hammer 2 and the hole of the ear plate 7 and is limited by the nut. In this way, the plugging hammer 2 is ensured to rotate relative to the hollow drill rod 1.

[0032] The clamping plate 3 is made of a steel plate with a size of 0.3*0.7m and is welded with the hollow drill rod 1. It is mainly used to connect with the clamping opening of the driving and pulling machine 6. During the construction process, the clamping opening of the driving and pulling machine 6 clamps the clamping plate 3, so that the hollow drill rod 1 is connected with the driving and pulling machine 6 firmly.

[0033] The insertion hole 4 is mainly used for inserting the well point pipe into the hollow drill rod 1, and the well point pipe is inserted and then moved downward. The distance from the insertion hole 4 to the bottom of the hollow drill rod 1 is 20 cm longer than the length of the well point pipe.

[0034] Since the well point pipe designed in the A project has two sizes, 4 m and 6 m, two groups of insertion holes 4 are designed for the drilling and embedding of different well point pipes.

[0035] For example, two insertion holes 4 are reserved in the A project, and the distance from the insertion hole 4 to the bottom of the hollow drill rod is 4.2 m and 6.2 m respectively. The insertion hole 4 is a long hole with a size of 500 mm x 50 mm, which is used for inserting the well point pipe into the hollow drill rod.

[0036] A vacuum well point dewatering dry drilling insertion hole device construction method, comprising the following steps:

[0037] Step one: fix the clamping plate 3 of the puller 6 with the clamping opening, and vertically lift the hollow drill rod 1; start the puller 6, vibrate the hollow drill rod 1, and check whether it is connected firmly.

[0038] Step two: adjust the position of the puller 6, align the bottom of the hollow drill rod 1 with the surface position where the hole needs to be drilled, manually use a simple handheld hook to pull the plug hammer 2 horizontally straight, close the bottom of the hollow drill rod 1, and then use the puller 6 to drill the hollow drill rod 1 into the soil layer.

[0039] Step three: when the lower end of the hollow drill rod 1 is drilled to the insertion hole installation position, the puller 6 vertically lifts the hollow drill rod by about 20 cm. During the lifting of the hollow drill rod, the plug hammer 2 is opened by using the friction of the hole and its own gravity to turn downward, and then the well point pipe is gradually inserted into the hollow drill rod 1 through the insertion hole 4, and gradually moves downward in the hollow drill rod 1 and passes through the bottom end of the hollow drill rod to fall into the hole. Finally, the hollow drill rod 1 is pulled out, and the well point pipe is left in the soil layer.

Claims

1. A dry hole casing pusher for a vacuum well point precipitation, characterized by: The utility model relates to a hollow drill rod (1) is provided with a plugging hammer (2) at the lower end, the plugging hammer (2) is used for plugging the hollow drill rod (1) in horizontal state, and the lower end opening of the hollow drill rod (1) is opened in vertical state.

2. The dry well point installation device according to claim 1, wherein: The upper end of the hollow drill rod (1) is fixed with a clamping plate (3) connected with a driving and pulling machine (6).

3. The dry well point installation apparatus of claim 1, wherein: The hollow drill rod (1) is made of a seamless steel pipe with a wall thickness greater than 10 mm.

4. The dry well point installation apparatus of claim 1, wherein: The inner diameter of the hollow drill rod (1) is 3-5 times the inner diameter of the well point pipe.

5. The dry well point installation apparatus of claim 1, wherein: The length of the hollow drill rod (1) is 0.8 m-1 m longer than the length of the well point pipe.

6. The dry well point installation apparatus of claim 1, wherein: The plugging hammer (2) is made of a solid steel column, one side of the plugging hammer (2) is provided with a through hole, the bottom of the corresponding hollow drill rod (1) is welded with an ear plate with a hole, and a bolt passes through the ear plate with a hole and the plugging hammer (2) and is limited by a nut.

7. The dry well point installation apparatus of claim 1, wherein: The insertion hole (4) is arranged on the upper part of the hollow drill rod (1), and the distance from the insertion hole (4) to the bottom of the hollow drill rod (1) is 20 cm-40 cm longer than the length of the well point pipe.

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