Full-protecting-cylinder rotary drilling equipment for water-rich pebble layer

Abstract

The utility model provides a kind of full protection cylinder rotary drilling equipment in water-rich pebble layer, belong to pile foundation construction technical field. Including rotary drilling machine, driving and pulling machine and full protection cylinder, full protection cylinder includes upper protection cylinder and lower protection cylinder, upper protection cylinder is arranged in the upper end of lower protection cylinder, the inner diameter of upper protection cylinder is greater than the outer diameter of lower protection cylinder, and upper protection cylinder is equipped with acting part, and the pile clamp of driving and pulling machine holds acting part, and acting part is equipped with the cavity of taking out pile clamp between lower protection cylinder, and rotary drilling machine is inserted in lower protection cylinder.The utility model is equipped with the acting part matched with driving and pulling machine on upper protection cylinder, and the cavity of taking out is formed between acting part and lower protection cylinder outer wall, when pile clamp acts on the cavity of taking out, rotary drilling bit in lower protection cylinder will not be interfered, to realize side rotary drilling, side driving, without waiting, effectively reduce rotary drilling, driving time, even in water-rich pebble layer can be quickly and effectively formed hole.

Description

Technical Field

[0001] A rotary drilling device for full casing drilling in water-rich pebble layers belongs to the field of pile foundation construction technology. Background Technology

[0002] In recent years, with the improvement of people's living standards, the requirements for living environment have increased year by year, leading to the emergence of sea-view and lakeside properties. However, the impact of groundwater is a major concern when building residences around rivers. Riverbeds often have shallow sand and gravel layers, which, over time, have been replaced by complex underground soil layers such as backfill. To maximize land utilization, buildings are becoming increasingly taller, requiring deeper foundation pits and more pile foundations. When using rotary drilling rigs, conventional construction techniques mostly rely on mud slurry for borehole formation. However, due to groundwater influence, an effective mud slurry layer cannot be formed, causing the rotary drilling rig to collapse in the gravel layer and preventing pile formation. Therefore, full-casing cast-in-place pile construction technology has been adopted. However, existing technologies lack effective solutions for how to penetrate water-rich gravel layers with a full-casing system and how to effectively coordinate rotary drilling rigs and extraction machines to form holes for pile formation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a rotary drilling equipment for full casing drilling in water-rich pebble layers, which enables the rotary drilling machine and the excavator to be used continuously in conjunction to quickly penetrate the water-rich pebble layer with the full casing and effectively form a hole.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: The rotary drilling equipment for water-rich pebble layer full casing includes a rotary drilling machine, a driving and pulling machine and a full casing. The full casing includes an upper casing and a lower casing. The upper casing is set at the upper end of the lower casing. The inner diameter of the upper casing is larger than the outer diameter of the lower casing. The upper casing is provided with an action part. The pile clamp of the driving and pulling machine holds the action part. There is a clamping cavity between the action part and the lower casing to accommodate the pile clamp. The rotary drilling bit of the rotary drilling machine is inserted into the lower casing.

[0005] Preferably, it also includes a support device, which is installed on the rotary drilling rig and fitted over the lower casing.

[0006] Preferably, the support device includes two support arms, a fixed block, and a telescopic device. The fixed block is mounted on the rotary drilling rig, the two support arms are rotatably mounted at both ends of the fixed block, and the telescopic device is mounted between the two support arms, which drive the support arms to close together to form a support cavity. The lower casing is mounted inside the support cavity.

[0007] Preferably, the upper casing has two working parts, which are symmetrically arranged on the upper casing. There are two clamping cavities between the working parts and the lower casing, and the pile clamp of the driving and pulling machine connects the two working parts.

[0008] Preferably, the driving and pulling machine is equipped with two pile clamps, which are respectively set in two clamping cavities, and there is a space between the two pile clamps for the rotary drilling bit to pass through the rotary drilling cavity.

[0009] Preferably, the length of the lower casing is 10-13 m.

[0010] Preferably, the length of the upper casing is 0.3~0.4m.

[0011] Compared with existing technologies, the beneficial effects of this technical solution are: This invention features an action part on the upper casing that works in conjunction with the drilling and pulling machine. The action part forms a clamping cavity between itself and the outer wall of the lower casing. When the pile clamp acts on the clamping cavity, it will not interfere with the rotary drilling bit operating inside the lower casing, thus enabling simultaneous rotary drilling and pile driving without waiting. This effectively reduces the time required for rotary drilling and pile driving, and allows for rapid and effective hole formation even in water-rich gravel layers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the rotary drilling equipment for water-rich pebble layers.

[0013] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0014] Figure 3 This is a top view of the pile clamp and the working part of Embodiment 2 of this utility model.

[0015] Among them: 1. Rotary drilling machine 101, power head 102, rotary drilling bit 2. Drilling and pulling machine 201, pile clamp 3. Full casing 301, upper casing 302, lower casing 303, working part 4. support arm 5. fixing block 6. telescopic device 7. miscellaneous fill layer 8. water-rich gravel layer 9. silty clay layer. Detailed Implementation

[0016] Figures 1-2 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-3 The present invention will be further described below.

[0017] Example 1: Reference Figures 1-2The rotary drilling equipment for full casing drilling in water-rich pebble layers includes a rotary drilling machine 1, a drilling and pulling machine 2, and a full casing 3. The full casing 3 includes an upper casing 301 and a lower casing 302. The upper casing 301 is 0.35m long, and the lower casing 302 is 12m long. The upper casing 301 is located at the upper end of the lower casing 302. The inner diameter of the upper casing 301 is larger than the outer diameter of the lower casing 302. The upper casing 301 is provided with an action part 303 that cooperates with the pile clamp 201. There is a clamping cavity between the action part 303 and the outer wall of the lower casing 302 for the pile clamp 201 to clamp. The rotary drilling bit 102 acts inside the lower casing 302.

[0018] When the high-speed hydraulic pile driver 2 is working, the vibratory box and pile clamp 201 are usually assembled with the excavator via an auxiliary arm or other structure. The oil pipes on the auxiliary arm are connected to the excavator to control the movement of the auxiliary arm. The oil pipes on the auxiliary arm are connected to the oil pipes of the hydraulic motor and the hydraulic cylinder oil pipes of the pile clamp 201. After the excavator applies hydraulic pressure, the hydraulic motor rotates at high speed, driving the eccentric assembly to generate excitation force. The excitation force drives the high-frequency vibratory box and pile clamp 201 to vibrate. After the vibration is damped by the rubber pads, it is maintained at a fixed amplitude, and the vibration is transmitted to the pile body through the pile clamp 201. For the specific working principle, refer to patent CN105464116A.

[0019] In this embodiment, the pile clamp 201 clamps the end of the action part 303. The action part 303 is integrally formed with the upper casing 301. The action part 303 is a boss with an internal groove. In actual use, the rotary drilling rig 1 and the driving and pulling machine 2 are respectively set on both sides of the casing 3. The action part 303 is set on the side of the lower casing 302 near the driving and pulling machine 2 to facilitate the action of the pile clamp 201. The upper casing 301 is sleeved on the upper end of the lower casing 302 and is integrally formed with the lower casing 302. In other embodiments, the upper casing 301 can also be connected to the lower casing 302 by bolts.

[0020] The inner diameter of the action part 303 is larger than the outer diameter of the upper casing 301. A clamping cavity is formed between the inner wall of the action part 303 and the outer wall of the lower casing 302. The pile clamp 201 extends into the clamping cavity and clamps the upper end of the action part 303. The pile clamp 201 is driven by a vibrator to achieve the pile driving function. The rotary drilling bit 102 of the rotary drilling rig 1 extends into the lower casing 302. Under the action of the power head 101, it rotary digs the gravel soil layer in the lower casing 302. The clamping cavity between the action part 303 and the lower casing 302 provides a certain space for the pile clamp 201. Even when the rotary drilling rig 1 is working, the pile driver 2 can continue to drive piles, realizing the effect of rotary drilling and pile driving at the same time.

[0021] Because the pile clamp 201 acts on one side of the upper casing 301, the lower casing 302 will tilt during pile driving. Therefore, in this embodiment, a support device for supporting the lower casing 302 is also provided on the column of the rotary drilling rig 1. The support device includes two support arms 4, a fixing block 5, and a telescopic device 6. The fixing block 5 is set on the rotary drilling rig 1, the two support arms 4 are rotatably set at both ends of the fixing block 5, and the telescopic device 6 is set between the two support arms 4, driving the support arms 4 to close together to form a support cavity, in which the lower casing 302 is set.

[0022] Specifically, support arms 4 are spaced apart at both ends of the fixed block 5. The support arms 4 are C-shaped. One end of the support arm 4 is rotatably connected to the fixed block 5 through a pivot, and the other end is set opposite to it. The support arms 4 are driven to close or open by the telescopic device 6 set between the two support arms. The specific structure of the telescopic device 6 can be found in patent CN106743058A, and will not be described in detail here.

[0023] Example 2: Reference Figure 3 The difference between this embodiment and embodiment 1 is that the pile clamp 201 of the driving and pulling machine 2 is a combined driving and pulling machine head. There are two pile clamps 201, which can act on the working part 303 at the same time. In this embodiment, the working part 303 is a ring that protrudes outward along the circumference of the upper protective sleeve 301.

[0024] Referring to the combined excavator head of patent CN211446921U, an inverted U-shaped frame is mounted on the auxiliary boom or directly on the excavator. The shock absorber box inside the frame is mounted on the frame via a rotating shaft. A limiting structure allows the entire shock absorber box to be horizontally positioned. The pile clamp 201 is L-shaped, with its horizontal connecting section connected to the vibration chamber inside the shock absorber box. The vertical clamping section, extending beyond the shock absorber box, simultaneously acts on the action part 303. The limiting structure can be achieved by providing bolt holes on the frame and the shock absorber box. When the shock absorber box is horizontally positioned, bolts are inserted to secure it.

[0025] Because the driving force of the pile clamp 201 during pile driving by the pile driver 2 is a symmetrical force acting on both sides of the action part 303, the lower casing 302 will not deviate laterally during the sinking process, meaning that a support device is not required on the rotary drilling rig 1. In other embodiments, a support device may also be provided to support the lower casing 302.

[0026] Work process: The rotary drilling rig 1 excavates a hole in the miscellaneous fill layer 7 to place the full casing 3. The full casing 3 is placed in the hole. At this time, the rotary drilling rig 1 extends the rotary drill bit 102 into the lower casing 302 to rotary excavate the water-rich gravel layer 8. The driving and pulling machine 2 simultaneously vibrates the action part 303 to drive the pile, so that the rotary drilling rig 1 and the driving and pulling machine 2 can work at the same time to quickly push the lower casing 302 through the water-rich gravel layer 8 until it extends into the silty clay layer 9, thus completing the hole formation operation of the cast-in-place pile.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A rotary drilling equipment for full casing drilling in water-rich pebble layers, characterized in that: The equipment includes a rotary drilling rig (1), a drilling and extraction machine (2), and a full casing (3). The full casing (3) includes an upper casing (301) and a lower casing (302). The upper casing (301) is located at the upper end of the lower casing (302). The outer diameter of the upper casing (301) is larger than the outer diameter of the lower casing (302). The upper casing (301) is provided with an action part (303). The pile clamp (201) of the drilling and extraction machine (2) clamps the action part (303). There is a clamping cavity between the action part (303) and the lower casing (302) to accommodate the pile clamp (201). The rotary drilling bit (102) of the rotary drilling rig (1) is inserted into the lower casing (302).

2. The rotary drilling equipment for full casing drilling in water-rich pebble layers according to claim 1, characterized in that: It also includes a support device, which is installed on the rotary drilling rig (1) and is fitted over the lower casing (302).

3. The rotary drilling equipment for full casing drilling in water-rich pebble layers according to claim 2, characterized in that: The support device includes two support arms (4), a fixed block (5) and a telescopic device (6). The fixed block (5) is set on the rotary drilling machine (1). The two support arms (4) are rotatably set at both ends of the fixed block (5). The telescopic device (6) is set between the two support arms (4) to drive the support arms (4) to close together to form a support cavity. The lower casing (302) is set inside the support cavity.

4. The rotary drilling equipment for full casing drilling in water-rich pebble layers according to claim 1, characterized in that: The upper casing (301) is provided with two working parts (303), which are symmetrically arranged on the upper casing (301). There are two clamping cavities between the working parts (303) and the lower casing (302). The pile clamp (201) of the driving and pulling machine (2) connects the two working parts (303).

5. The rotary drilling equipment for full casing drilling in water-rich pebble layers according to claim 4, characterized in that: The excavator (2) is equipped with two pile clamps (201), which are respectively set in two clamping cavities, and a rotary drilling bit (102) is provided between the two pile clamps (201) for the rotary drilling bit (102) to pass through the rotary drilling cavity.

6. The rotary drilling equipment for full casing drilling in water-rich pebble layers according to claim 1, characterized in that: The length of the lower casing (302) is 10~13m.

7. The rotary drilling equipment for full casing drilling in water-rich pebble layers according to claim 1, characterized in that: The length of the upper casing (301) is 0.3~0.4m.

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