An earth pressure balance shield tunneling soil discharging, transferring and transporting method

Abstract

The present invention relates to a method for transferring excavated soil during the excavation of an earth pressure balance shield. A mud bucket box with an automatically retractable and extendable insertion rod for storing waste soil and a shelving rack installed on the soil collection box are used. A mud bucket landing positioning, flipping mechanism and a rotating shaft reset mechanism are installed on the cross beam of the shelving rack, and in cooperation with a gantry crane, the soil in the mud bucket box can be neatly poured into the soil collection box. The method for transferring excavated soil during the excavation of an earth pressure balance shield according to the present invention uses a mud bucket box with an automatically retractable and extendable insertion rod for storing waste soil and a shelving rack on the soil collection box, which can solve the problem that the existing common methods bring certain restrictions to the normal use of the crane; the problem of insecurity that the mud bucket box is tilted by the traction of the crane, the upper and lower extension rods deviate from the center of gravity, and the mud bucket box forms an overturning moment to complete the dumping action.

Description

Technical Field

[0001] The present invention relates to the field of underground shield engineering, and in particular to a method for transferring excavated (abandoned) soil in an earth pressure balance shield tunneling operation. Background Art

[0002] The shield construction technology was introduced into the domestic municipal sewage, subway and other fields in the late 1980s and early 1990s, and has been continuously promoted and applied. So far, the domestic urban rail transit subway and large transportation hub underground tunnel projects basically adopt this technology for construction.

[0003] At present, for urban underground shield construction, the earth pressure balance shield and slurry balance shield construction technologies are mainly used. Compared with the slurry balance shield technology, the earth pressure balance shield technology occupies less space, and the disposal of abandoned soil is simple, efficient and environmentally friendly, making it more suitable for construction in the bustling city centers where every inch of land is precious in large and medium-sized cities. For the laying of underground pipelines by the earth pressure balance shield, during the tunneling process, the excavated soil and construction materials (except for extra-large tunnels) are generally transported by environmentally friendly battery-powered locomotives towing trailers equipped with materials and mud buckets.

[0004] For the earth pressure balance shield, especially for the transfer of excavated soil in a long tunnel, it is one of the key factors affecting the tunneling efficiency. Therefore, for the horizontal transportation in the tunnel, the battery-powered locomotive is used. Under the effective space and transportation capacity of the tunnel construction, in order to reduce the number of round trips and time of the battery-powered locomotive, the larger the volume of a single mud bucket for storing the excavated soil, the better. Generally, the soil storage capacity of each mud bucket is not less than the amount of soil replaced by one ring of segment in the shield tunnel excavation; at present, for the vertical lifting, horizontal transportation on the ground and dumping operations, they are mainly completed by ground vehicles. Due to the large capacity and heavy weight of the mud bucket, a large crane is also required to flip the mud bucket to dump the accumulated soil. When using a vehicle alone to complete the dumping of the mud bucket, it is necessary to use double hooks, and the lifting capacity of the auxiliary hook and the distance and position between the two hooks need to be matched and reasonable, which is generally difficult to meet the requirements. Currently, two common methods are used: one is to arrange a very long hanging fixed hook on the lifting trolley on the upper part of the vehicle or on the overhead beam on the top of the vehicle, hook the special hook at the bottom of the mud bucket, and use it in combination with the main hook to flip the mud bucket for dumping, which brings certain limitations to the normal use of the vehicle; another traditional method is to place a pair of vertical rods with fork-shaped grooves at the top on the soil collection box for temporarily storing abandoned soil at the construction site. Using the upper and lower outer extension rods at both ends of the mud bucket, the upper rod is hooked with a lifting tool. After lifting the mud bucket above the vertical rod, insert the lower rod of the mud bucket into the fork-shaped groove, and use the vehicle to tow the mud bucket to tilt, so that the upper and lower outer extension rods deviate from the center of gravity, and the mud bucket forms an overturning moment to complete the dumping action. This method has certain safety hazards to the vertical rod and the vehicle trolley. Therefore, a new method for transferring excavated (abandoned) soil in an earth pressure balance shield tunneling operation is needed to improve and solve the problems existing in the prior art. Summary of the Invention

[0005] The present invention aims to provide an earth pressure balance shield tunneling soil transfer method to improve and solve the problems existing in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is: an earth pressure balance shield tunneling soil transfer method, which uses a mud bucket box with an automatically retractable and extendable insertion rod for storing and abandoning soil, and a shelving rack installed on the soil collection box. A mud bucket landing positioning, flipping mechanism and a rotating shaft reset mechanism are installed on the cross beam of the shelving rack, and in cooperation with a gantry crane, the soil in the mud bucket box is neatly poured into the soil collection box. The steps are as follows: First, lift the mud bucket box with a crane and then hoist it up, so that the insertion rod on the mud bucket box slides down and extends. The insertion rod mechanism changes from the initial retracted state to the working state where the insertion rod is fully extended; continue to lift the mud bucket box and translate it so that the insertion rod leans against the rotating shaft of the cross beam of the gantry of the shelving rack. After stopping translation, lower the mud bucket box. Under the precise guidance of the mud bucket landing guide ring, until the insertion rod touches and presses the flipping mechanism welded to the rotating shaft, driving the rotating shaft to rotate clockwise. The mud bucket continues to be lowered and sits on the rotating shaft, and the lever-type flipping mechanism just catches the stop position at the bottom of the mud bucket box, and its cross bar also just catches the front and back sides of the insertion rod. The hook slowly moves left and down, so that the mud bucket rotates counterclockwise until the mud bucket is flipped by 90°, and the soil in the bucket also pours out accordingly. Then the hook stops moving left and slowly moves right and down in the reverse direction to continue flipping and dumping the mud bucket, so that the sticky abandoned soil in the mud bucket box is emptied. The hook drives the mud bucket box to move in the reverse direction, and the mud bucket box disengages from the shelving rack on the soil collection box. Under the combined action of the rotating shaft reset mechanism, the mud bucket flipping mechanism returns. Finally, the empty mud bucket box is placed back on the mud bucket trailer in the working well. Under the gravity of the mud box, the insertion rod of the insertion rod mechanism of the mud bucket box pushes open the limit device and retracts to the initial state. At the same time, the ejector rod is touched, and the pressing component drives the ejector rod to act. The ejector rod re-presses the clamping short rod so that the insertion rod is locked again.

[0007] Further, the mud bucket box adopts a rectangular plate wall box frame structure. In the middle of one long side of the box body, the plate wall is disconnected and a pair of steel sleeves protruding into the box wall are welded. A slidable pressing structure insertion rod is installed in each of the two steel sleeves, forming a set of dedicated insertion rods for pouring mud.

[0008] Further, the shelving rack is installed on the soil collection box for temporarily storing tunnel excavation waste at the construction site and is used in combination with the mud bucket box. The shelving rack is composed of columns, diagonal braces, and cross beams and is a set of assembled gantry structures. A torsion spring reset device and a rotating shaft with a mud bucket landing guide ring are sleeved on the core shaft of the cross beam; a mud bucket flipping mechanism is welded on the rotating shaft.

[0009] Further, the columns are divided into side columns and middle columns. The upper part is welded with a flange diagonal rod connecting the diagonal braces, and the top is welded with a transverse short rod with a flange; the cross beam is composed of a core shaft and a rotating shaft sleeved on it. Torsion spring reset devices are installed at both ends of the rotating shaft and are connected to the core shaft and the rotating shaft respectively through key pins.

[0010] Further, an infrared ray instrument with sound and light alarm can be additionally installed on the shelving rack to help the mud bucket box accurately locate and lean on the rotating shaft of the shelving rack.

[0011] The beneficial effects of the present invention are as follows:

[0012] For the method of earth pressure balance shield tunneling and soil transfer of the present invention, the mud bucket box with automatic retractable inserting rods for storing and abandoning soil and the shelving rack on the soil collecting box are adopted, which can solve the problems existing in the two commonly used methods: one is to arrange a very long hanging fixed hook on the hoisting trolley on the upper part of the crane or on the overhead beam on the top of the crane, hook the special hook at the bottom of the mud bucket box, and use it in cooperation with the main hook to flip the mud bucket box for dumping soil, which brings certain restrictions to the normal use of the crane; another traditional method is to place a pair of vertical rods with fork-shaped grooves at the top on the soil collecting box for temporarily storing abandoned soil at the construction site. Using the upper and lower extending rods at both ends of the mud bucket box, the upper rod is hung with a lifting tool. After lifting it above the vertical rod, the lower rod of the mud bucket box is inserted into the fork-shaped groove, and the mud bucket box is tilted by the traction of the crane. The upper and lower extending rods deviate from the center of gravity, and the mud bucket box forms an overturning moment to complete the dumping action. This method has certain safety hazards to the vertical rod and the crane trolley. Description of the Drawings

[0013] Figure 1 is the elevation view of the mud bucket box with automatic retractable inserting rods;

[0014] Figure 2 is the side view of the mud bucket box with automatic retractable inserting rods;

[0015] Figure 3 is the plan view of the mud bucket box with automatic retractable inserting rods;

[0016] Figure 4 is the elevation view of the shelving rack for dumping mud of the mud bucket box installed on the soil collecting box;

[0017] Figure 5 is Figure 4 the a-a cross-sectional view in

[0018] Figure 6 is the schematic diagram of the flipping mechanism welded to the rotating shaft of the cross beam of the shelving rack;

[0019] Figure 7 is Figure 6 the a-a cross-sectional view in

[0020] Figure 8 is the process diagram of the working condition of the method of earth pressure balance shield tunneling and (abandoning) soil transfer of the present invention. Detailed Embodiments

[0021] The following further describes in detail the specific embodiments of the present invention in conjunction with the drawings. The following legends are used to illustrate the present invention, but not to limit the scope of the present invention.

[0022] As Figures 1 to 8 shown, for the method of transferring and transporting the excavated soil of the earth pressure balance shield tunneling in the present invention, two mechanical devices are adopted: a mud bucket box 9 with an automatically retractable and extendable insertion rod for storing and abandoning the soil, and a shelving rack installed on the soil collection box. A mud bucket dropping rack positioning, flipping and rotating shaft resetting mechanism is installed on the cross beam 4 of the shelving rack. And through their combined use, the soil in the mud bucket is neatly poured into the soil collection box 8 in cooperation with the gantry crane.

[0023] As Figures 1 to 3 shown, the main box body of the mud bucket box 9 is a conventional rectangular plate wall box frame structure. In the middle of one long side of the box body, the plate wall is disconnected and a pair of steel sleeves protruding into the box wall are welded. A slidable insertion rod 22 with a structure similar to the pressing structure of a ballpoint pen inside is installed in each of the two steel sleeves, forming a set of special insertion rod mechanisms for pouring mud. Suspension rods 20 protruding outward at the upper part and external supporting rods 21 at the lower part are respectively arranged on both sides of the box body.

[0024] As Figures 4 to 7 shown, the shelving rack is installed on the soil collection box (which can be a concrete structure or a steel structure) for temporarily storing the excavated soil during tunnel construction at the construction site, and is specially matched with the mud bucket. It is a set of assembled portal frame structures. The shelving rack is composed of columns 1, diagonal braces 10, cross beams 4, etc. A torsion spring reset device 6 with a mud bucket landing guide ring 5 and a rotating shaft 4 are sleeved on the core shaft 2 of the cross beam 4; a mud bucket flipping mechanism 7 is welded on the rotating shaft 4.

[0025] For the assembled portal frame structure, according to the actual size of the soil abandonment box, multiple groups can be assembled and used. The columns 1 are divided into side columns and middle columns. The upper part is welded with a flange diagonal rod that can be connected to the diagonal brace 10, and the top is welded with a transverse short rod with a flange; the cross beam 4 is composed of a core shaft 2 and a rotating shaft 3 sleeved on it. Torsion spring reset devices 6 are installed at both ends of the rotating shaft 3 and are connected to the core shaft 2 and the rotating shaft 3 respectively through key pins. A mud bucket flipping mechanism 7 with a landing guide ring is welded on the rotating shaft 3. In addition, an infrared ray instrument with sound and light alarm can be installed on the shelving rack to help the mud bucket box 9 accurately position and sit on the rotating shaft 3 of the shelving rack.

[0026] For the method of transferring and transporting the excavated (abandoned) soil of the earth pressure balance shield tunneling in the present invention, as Figure 8 shown in (a) working condition 1 to (e) working condition 5, during the tunnel tunneling process, when the mud buckets of a group of trailers placed at the head of the shield machine are filled with abandoned soil, the battery locomotive transports them to the working shaft at the end of the tunnel, and they are hoisted by the ground crane to the soil collection box for dumping soil. The shelving rack installed on the soil collection box is used in cooperation with the mud bucket for dumping soil.

[0027] The specific operation is to first use a crane to lift the mud bucket to a vacant area next to the soil collecting box, lower the mud bucket, let the bottom of the box touch the ground, and under the action of gravity, the top rod of the insertion rod drives the push rod to move through the "pressing assembly", and the compressed short rod falls back into the inclined hole of the insertion rod, and the locking position of the insertion rod is released. The mud bucket is lifted again, the insertion rod slides down and extends, and the insertion rod mechanism switches from the initial retracted state to the working state where the insertion rod is fully extended. When the mud bucket continues to be lifted and the height of the bottom of the box slightly exceeds the crossbeam of the shelf frame, the infrared ray meter sound and light alarm reminds, the hook stops lifting the mud bucket, and translates to make the insertion rod close to the rotating shaft of the crossbeam of the upper frame (see Figure 8 (a) Working condition 1), after stopping the translation, lower the mud bucket, and under the precise guidance of the mud bucket positioning guide ring, the plug rod hits the flip mechanism welded with the rotating shaft (see Figure 8 (b) Working condition 2), the shaft is driven to rotate clockwise, the bucket is lowered and sits on the shaft, and the lever-type flip mechanism is just stuck to the stop position at the bottom of the bucket box, and its cross bar also just blocks the front and rear sides of the insertion rod (see Figure 8 (c) Working condition 3), the hook is slowly moved to the left and downward, so that the mud bucket rotates counterclockwise until the mud bucket flips to 90° (see Figure 8 (d) Working condition 4), the soil in the bucket is also poured out. At this time, the first soil dumping infrared ray instrument sound and light alarm can be set, the hook stops moving left, and moves slowly to the right and downward to make the bucket continue to turn over and dump, so that the sticky waste soil in the bucket can be poured out as much as possible (see Figure 8 In (e) working condition 5), in order to prevent the mud bucket from overturning, a second soil dumping infrared ray meter sound and light alarm can be set. At this point, the mud bucket dumping work is completed, and the hook drives the mud bucket to press Figure 8 The bucket moves in the reverse direction from working condition 1 to working condition 5 in (a) to (e), and the bucket is separated from the shelf on the soil collecting box. The rotating shaft is also under the joint action of the reset mechanism, and the bucket flipping mechanism returns to the Figure Seven Working condition one. When the empty bucket is put back onto the bucket trailer in the working well, the insertion rod of the bucket insertion rod mechanism opens the limit device under the gravity of the mud box and retracts to the initial state. At the same time, the push rod is touched, and the pressing assembly drives the push rod to move. The push rod re-presses the short rod to lock the insertion rod again. At this point, a round of soil dumping work with the use of soil abandonment machinery is completed. The insertion rod pressing and retracting operation of the bucket insertion rod mechanism has no restrictions on the working environment. It can be used underground, on a trailer, on the ground, next to the soil collection box, etc. as long as it is convenient. When the bucket is out of use for a long time or used as a conventional bucket. The insertion rod fixing pin can be passed through the insertion rod fixing hole and the insertion rod fixing stop pin hole reserved in the steel casing to completely fix the insertion rod.

Claims

1. An earth pressure balance shield tunneling and soil transfer method, characterized in that: Adopt a mud bucket box with an automatic retractable and extendable insertion rod for storing and discarding soil, and a shelving rack installed on the soil collection box. On the crossbeam of the shelving rack, there are a positioning, flipping mechanism for the mud bucket to fall off the rack and a shaft reset mechanism. Cooperating with the gantry crane, the soil in the mud bucket box can be neatly poured into the soil collection box. The steps are as follows: First, after the mud bucket box reaches under the crane hook, use the crane hook to lift the mud bucket box, so that the insertion rod on the mud bucket box slides down and extends. The insertion rod mechanism changes from the initial retracted state to the working state where the insertion rod is fully extended; continue to lift the mud bucket box, and translate it so that the insertion rod leans against the rotating shaft of the gantry crossbeam of the shelving rack. After stopping the translation, lower the mud bucket box. Under the precise guidance of the mud bucket landing guide ring, until the insertion rod touches and presses the flipping mechanism welded to the rotating shaft, driving the rotating shaft to rotate clockwise. The mud bucket is lowered and sits on the rotating shaft, and the lever-type flipping mechanism just catches the stop position at the bottom of the mud bucket box, and its crossbar just catches both sides of the insertion rod front and back. The hook slowly moves to the left and down, making the mud bucket rotate counterclockwise until the mud bucket flips to 90°, and the soil in the bucket also pours out accordingly. Then the hook stops moving to the left and moves slowly to the right and down in the reverse direction to make the mud bucket continue to flip and pour, so that the sticky discarded soil in the mud bucket box is emptied. The hook drives the mud bucket box to move in the reverse direction, and the mud bucket box disengages from the shelving rack on the soil collection box. Under the combined action of the rotating shaft reset mechanism, the mud bucket flipping mechanism returns. Finally, the empty mud bucket box is placed back on the mud bucket trailer in the working well. Under the gravity of the mud box, the insertion rod of the insertion rod mechanism of the mud bucket box pushes open the limit device and retracts to the initial state. At the same time, the ejector rod is touched, and the pressing component drives the ejector rod to act. The ejector rod re-presses the clamping short rod so that the insertion rod is locked again; the mud bucket box adopts a rectangular plate wall box frame structure. In the middle of one long side of the box body, the plate wall is disconnected and a pair of steel sleeves protruding into the box wall are welded. In each of the two steel sleeves, a slidable pressing structure insertion rod is installed, forming a set of special insertion rods for pouring mud.

2. The soil pressure balance shield tunneling and soil transfer method according to claim 1, characterized in that: The said shelving rack is installed on the soil collection box for temporarily storing the tunnel excavation discarded soil at the construction site and is used in supporting with the mud bucket box. The shelving rack is a set of assembled gantry structures composed of columns, diagonal braces and crossbeams. On the core shaft of the crossbeam, a torsion spring reset device and a rotating shaft with a mud bucket landing guide ring are sleeved; a mud bucket flipping mechanism is welded on the rotating shaft.

3. The earth pressure balance shield tunneling soil discharge transfer method according to claim 2, characterized in that: The said columns are divided into side columns and middle columns. The upper part is welded with a flange diagonal rod connecting the diagonal brace, and the top is welded with a transverse short rod with a flange; the crossbeam is composed of a core shaft and a rotating shaft sleeved on it. Torsion spring reset devices are installed at both ends of the rotating shaft and are respectively connected to the core shaft and the rotating shaft through key pins.

4. The method for transferring excavated soil during the excavation of an earth pressure balance shield tunneling machine according to claim 1, characterized in that: An infrared ray instrument with sound and light alarm is also installed on the said shelving rack to help the mud bucket box accurately position and sit on the rotating shaft of the shelving rack.

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