Cutter suction dredging device suitable for soft soil layer in open caisson sinking process

Abstract

The utility model belongs to the technical field of open caisson sinking, and relates to a cutter suction dredging device suitable for a soft soil layer in an open caisson sinking process, which is characterized by comprising a water inlet pipe, a mud outlet pipe and a dredging system, the dredging system comprises a hoisting frame, a winch, a mud pump, an asynchronous motor and a reamer, the winch is mounted on the hoisting frame, and the mud pump is mounted on the hoisting frame. A slurry pump is installed on a steel wire rope driven by the winch, and reamers driven by an asynchronous motor are installed on the periphery of the slurry pump through an installation frame. A water inlet pipe is installed at the upper end of the mud pump in a limiting mode, and a mud outlet of the mud pump is connected with a mud outlet pipe. In the sinking process of the open caisson, if the open caisson encounters a soft soil layer, the soft soil layer can be changed into mud through water inflow of the water inlet pipe and stirring of the reamer, and then cutter suction dredging operation is carried out. The problem that a traditional sinking mode is not suitable for a soft soil layer is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of open caisson sinking, and relates to a cutter suction dredging device, in particular to a cutter suction dredging device suitable for soft soil layers in the open caisson sinking process. Background Technique

[0002] The open caisson sinking construction of the seawater desalination water diversion project in the comprehensive port area of Huanghua Port is divided into two construction methods: drainage sinking and non-drainage sinking. During the sinking construction process, if it is found that the groundwater level is difficult to lower or the phenomenon of earth gushing and quicksand flow is relatively serious, and it has a greater impact on the surrounding environment, then water is filled into the open caisson for non-drainage sinking construction.

[0003] Conventional non-drainage sinking construction methods include grouting method, jacking method, grab method, shear wall method and other methods. However, the above methods, first, require that the strength of the foundation bottom be sufficient to withstand the pressure generated by the machine; second, the construction is relatively cumbersome and the cost is relatively high. The existing non-drainage sinking construction methods are not suitable for the construction of soft soil layers. Therefore, according to the actual situation on site, a simple dredging equipment is developed, which can not only have little requirement for the site soil layer conditions, but also be convenient for construction and reduce the construction cost. Content of the Utility Model

[0004] The purpose of the utility model is to provide a cutter suction dredging device suitable for soft soil layers in the open caisson sinking process, with a scientific and reasonable structural design, little requirement for the site soil layer conditions, convenient construction, reduced construction cost and easy to implement.

[0005] The utility model solves its technical problems through the following technical solutions:

[0006] A cutter suction dredging device suitable for soft soil layers in the open caisson sinking process, characterized in that: it includes a water inlet pipe, a mud outlet pipe and a dredging system. The dredging system includes a hoist, a winch, a slurry pump, an asynchronous motor and a cutter. A winch is installed on the hoist, a slurry pump is installed on the steel wire rope driven by the winch, and a cutter driven by an asynchronous motor is installed around the slurry pump through a mounting frame; a water inlet pipe is installed at the upper end limit of the slurry pump, and a mud outlet pipe is connected to the mud outlet of the slurry pump.

[0007] Moreover, the mounting frame is an L-shaped frame welded on the slurry pump, and an asynchronous motor is installed at the bottom of the L-shaped frame.

[0008] Moreover, the dredging system further includes a track, a track is erected at the wellhead of the open caisson, and the hoist is slidably installed on the track.

[0009] The advantages and beneficial effects of the utility model are:

[0010] 1. This applies to the cutter suction dredging device for soft soil layers in the caisson sinking process. During the caisson sinking process, when encountering soft soil layers, the soil can be turned into mud through the intake of water from the intake pipe and the agitation of the cutter, and then the cutter suction dredging operation can be carried out. This avoids the problem that the traditional sinking method is not applicable to soft soil layers.

[0011] 2. This applies to the cutter suction dredging device for soft soil layers in the caisson sinking process. Through the installation of tracks, it is convenient to move the dredging system, accelerate the efficiency of turning the soil in the caisson into mud, and thus improve the mud discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the present utility model (the asynchronous motor and the cutter in the front-back direction are omitted);

[0013] Figure 2 It is a top view of the present utility model (the winch, the mud pump and the asynchronous motor are omitted).

[0014] REFERENCE NUMERALS

[0015] 1 - intake pipe, 2 - track, 3 - caisson, 4 - winch, 5 - lifting frame, 6 - mud discharge pipe, 7 - mud pump, 8 - mounting frame, 9 - asynchronous motor, 10 - cutter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not restrictive, and the protection scope of the present utility model cannot be limited thereby.

[0017] A cutter suction dredging device applicable to soft soil layers in the caisson sinking process, the innovation of which lies in: including an intake pipe 1, a mud discharge pipe 6 and a dredging system. The dredging system includes a lifting frame 5, a winch 4, a mud pump 7, an asynchronous motor 9 and a cutter 10. The lifting frame is welded by high-strength and corrosion-resistant steel to improve the bearing capacity and stability of the lifting frame, and ensure the safe use of the dredging system during the caisson sinking process.

[0018] A winch is installed on the lifting frame. A mud pump is installed on the steel wire rope driven by the winch. A cutter driven by an asynchronous motor is installed around the mud pump through a mounting frame 8. The four cutters controlled by the asynchronous motor can achieve uniform and sufficient dredging and agitation in all directions, control the settlement deviation, improve the mud agitation efficiency at the same time, reduce the solid particle content in the mud, and prevent the mud pump from being blocked.

[0019] A water inlet pipe is installed at the upper limit of the mud pump, and a mud outlet pipe is connected to the mud outlet of the mud pump. The water inlet pipe is connected to a water source to ensure stable and sufficient water supply during the operation of the mud pump; the mud outlet pipe is made of wear-resistant and corrosion-resistant pipes to make the mud pipeline, ensuring smooth and stable mud transportation.

[0020] The installation frame is an L-shaped frame welded to the mud pump, and an asynchronous motor is installed at the bottom of the L-shaped frame.

[0021] To facilitate the movement of the dredging system and improve the efficiency of mud production and discharge, the dredging system further includes a track 2, a track is laid at the wellhead of the caisson 3, and the lifting frame is slidably installed on the track. The track is composed of two parallel channel steels with the channel openings facing upward, and moving wheels are arranged at the bottom of the lifting frame, and the moving wheels slide within the channel steels.

[0022] During specific operation, according to the actual situation of the caisson sinking, by controlling the water inflow in the water inlet pipe and adjusting the mud scraping direction of the cutter and the mud discharge speed of the mud pump, the present cutter suction dredging device can accurately scrape and remove the soil under the caisson, ensuring the smooth sinking of the caisson.

[0023] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art can understand that: within the spirit and scope of the present invention and the appended claims, various substitutions, changes and modifications are possible. Therefore, the scope of the present invention is not limited to the content disclosed in the embodiments and drawings.

Claims

1. A cutter suction dredging device applicable to soft soil layers in the caisson sinking process, characterized in that: It includes a water inlet pipe, a mud outlet pipe and a dredging system. The dredging system includes a lifting frame, a winch, a slurry pump, an asynchronous motor and a cutter. A winch is installed on the lifting frame. A slurry pump is installed on the steel wire rope driven by the winch. A cutter driven by an asynchronous motor is installed around the slurry pump through a mounting frame. A water inlet pipe is installed at the upper end of the slurry pump in a limited way. A mud outlet pipe is connected to the mud outlet of the slurry pump.

2. The cutter suction dredging device applicable to soft soil layers in the open caisson sinking process according to claim 1, wherein: The mounting frame is an L-shaped frame welded to the slurry pump, and an asynchronous motor is installed at the bottom of the L-shaped frame.

3. A cutter suction dredging device applicable to soft soil layers in the caisson sinking process according to claim 1, characterized in that: The dredging system further includes a track. A track is set up at the wellhead of the caisson, and the lifting frame is slidably installed on the track.

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