A shield tunneling construction method and system

Abstract

This invention discloses a shield tunneling construction method and system, relating to the field of shield tunneling technology, including the following specific steps: Step 1: Real-time acquisition of various working parameters of the shield machine and transmission of these parameters to the control center, calculating the amount of muck to be excavated; Step 2: Based on the amount of muck excavated, predicting the total amount of muck to be excavated in the future, configuring muck truck groups based on a matching strategy, and issuing dispatch instructions; Step 3: During the shield tunneling process, scheduling the muck trucks on site based on the dispatch strategy, controlling their entry and exit from the tunnel, ensuring that tunneling and muck excavation are synchronized until the tunneling of this ring is completed. This invention matches the muck transportation capacity with the shield tunneling efficiency, while also reducing the density of muck trucks inside the tunnel, thereby reducing the difficulty of traffic organization within the tunnel.

Claims

1. A shield tunneling construction method, characterized in that, The specific steps include the following: Step 1: Collect various working parameters of the tunnel boring machine in real time and transmit them to the control center. The amount of slag removed during tunneling is calculated. Step 2: Based on the amount of muck discharged during shield tunneling, predict the total amount of muck discharged during future shield tunneling, configure the muck truck grouping based on the matching strategy, and issue dispatch instructions. Step 3: During the tunnel boring process, the dump trucks on site are scheduled based on the scheduling strategy to control their entry and exit from the tunnel, so that the tunneling and muck removal are synchronized until the tunneling of this ring is completed. Based on the tunneling speed, the grouting pressure and grouting flow rate of the synchronous grout tank are adjusted so that the real-time grouting volume matches the voids generated by the tunneling behind the wall. Step 4: After the tunnel boring machine (TBM) completes the excavation, the leaking slag inside the tunnel is cleaned up, and the tail of the TBM is also cleaned. The assembly personnel assemble the tunnel segments in the already excavated area, and at the same time, the mortar truck injects mortar into the mortar tank of the TBM. After the grouting is completed, the mortar truck leaves the tunnel. Step 5: Start the next tunnel boring machine (TBM) construction cycle again, starting from Steps 2 to 4.

2. The shield tunneling construction method according to claim 1, characterized in that, Step 3 specifically includes: Step 3.1: Initially, after the first dump truck enters along the entrance line inside the tunnel, a second dump truck is arranged to enter along the entrance line inside the tunnel after a certain period of time. Step 3.2: Based on the scheduling strategy, the third dump truck can only enter the tunnel along the entrance line after the first dump truck finishes loading and exits along the exit line inside the tunnel. Meanwhile, the first dump truck unloads its load and then returns to the tunnel entrance to wait.

3. The shield tunneling construction method according to claim 2, characterized in that, The specific details of the scheduling strategy are as follows: Each dump truck is assigned a unique number and has four different working states: loading, transporting, unloading, and returning. The tunnel entrance is designated as a waiting reference point. Initially, when only one dump truck enters the tunnel, the truck at the waiting reference point will follow the entrance route into the tunnel until it reaches the designated location and waits. At this point, there are two dump trucks inside the tunnel. The truck in loading state must wait for the truck in transporting state to switch to transporting state. Only after the truck in transporting state has completely exited the tunnel along the exit route will the truck at the waiting reference point follow the entrance route into the tunnel until it reaches the designated location and waits. Once the truck in transporting state reaches the designated unloading location, it switches to unloading state and begins unloading. After unloading, the truck leaves the unloading location and switches to returning state.

4. The shield tunneling construction method according to claim 3, characterized in that, The scheduling strategy also includes: After a dump truck in the return state leaves the unloading position, in the first half of the distance between the unloading position and the waiting reference point, the dump truck that left the unloading position first is given priority in being assigned to the waiting reference point. In the second half of the distance between the unloading position and the waiting reference point, the position of the dump truck is updated every T time interval, and the dump truck that is closest to the waiting reference point is given priority in being assigned to the waiting reference point.

5. The shield tunneling construction method according to claim 1, characterized in that, The specific details of the matching strategy are as follows: The various working parameters of the tunnel boring machine are analyzed and processed, and then substituted into the formula for calculating the amount of slag discharged per unit time to obtain the real-time slag discharge of the tunnel boring machine. Based on the real-time muck discharge of the tunnel boring machine, predict the total muck discharge of the tunnel boring machine within a certain period of time t. Then, substitute the total muck discharge and the transportation capacity of a single dump truck into the formula for calculating the total number of transportation times for this loop to obtain the required total number of transportation times. Then, substitute the total number of transport trips, the tunneling time of this cycle, and the completion time of a single cycle of transport by a dump truck into the formula for calculating the required number of dump trucks to obtain the required number of dump trucks.

6. The shield tunneling construction method according to claim 5, characterized in that, The formula for calculating the amount of slag discharged by the tunnel boring machine per unit time is as follows: Q = A * V * K; Where A is the cross-sectional area of ​​the tunnel boring machine, V is the tunneling speed of the tunnel boring machine, and K is the soil softness coefficient; The formula for calculating the total number of transportation trips in this loop is as follows: M = Qt / C; Where Qt is the total amount of slag discharged during the predicted time period, and C is the transportation capacity of a single slag truck. The formula for calculating the required number of dump trucks is: N=M*T 循环 / T 掘进 *α; Where M represents the total number of transports, and T... 循环 T represents the completion time of a single cycle of transportation for a dump truck. 掘进 The tunneling time for this ring is denoted as α, where α is the settling coefficient and its value ranges from 1.2 to 1.

5.

7. The shield tunneling construction method according to claim 4, characterized in that, Each dump truck is equipped with a locator, which collects and transmits the location data of the corresponding dump truck to determine the distance between each dump truck and the waiting reference point at the tunnel entrance, and at the same time determines the position of the dump truck. In addition, monitoring devices are installed on the dump truck and its unloading position to collect the status of the dump truck and thus determine the working status of the dump truck.

8. The shield tunneling construction method according to claim 1, characterized in that, The specific content of step 4 is as follows: Step 4.1: When the tunnel boring machine stops excavating, the last dump truck enters along the tunnel entrance line. Then, flatbed trucks carrying tunnel segments and mortar trucks are dispatched to enter the tunnel along the tunnel entrance line until they reach the designated position to wait. Step 4.2: When the last dump truck leaves along the tunnel exit line, the assembly personnel will carry out the segment assembly construction inside the tunnel, and at the same time, the mortar truck will inject mortar into the mortar tank of the tunnel boring machine. Step 4.3: During the segment assembly process, the mortar truck simultaneously injects mortar into the mortar tank until the construction of the excavation area is completed. After the grouting is completed, the mortar truck exits the tunnel.

9. The shield tunneling construction method according to claim 1, characterized in that, The specific content of step 1 is as follows: The machine collects real-time data on the cutterhead speed, tunneling speed, tunneling cylinder pressure, screw conveyor speed, screw conveyor torque, soil moisture content, and soil density.

10. A shield tunneling construction system, which implements the shield tunneling construction method according to any one of claims 1 to 9, characterized in that, The system includes: The data acquisition module is used to collect various working parameters of the tunnel boring machine, the location data of the dump trucks, and the working status data of the dump trucks. A central processing module is used to process and analyze the data acquired by the data acquisition module and to issue control commands. The sorting module sorts the dump trucks for entry into the tunnel based on control commands issued by the central processing module. A storage module is provided for storing data acquired by the data acquisition module and control commands issued by the central processing module.

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