Shield driven, shield split starting lease, shield extended pipeline, shield fitting

Classify and analyze the different ways from the separate launching equipment organization and process organization, summarizes its characteristics, provide the reference for the similar construction to choose different launching technology. Key words: shield; separate launching process;

Introduction To Several Different EPB Separate

Shield Launching Program

Abstract from equipment and production process tissue way to classify the different way of separate hield: program, summarizes its characteristics, to choose different from similar shield launching program for references.

Key words: shield; separate shield launching program; production process

1, points classification originating mode

In order to maintain the brand currently the largest shield as an example, from the structure, equipment operation and the feasibility of production efficiency as the basis, the classification of shield launching way.

1.1 the distribution of iron equipment shield system

The main functions of the shield are distributed as follows:

Shield host bridge equipment Trailer No. 1 No. 2 trailer, trailer carrying Trailer 4, the main function of the system length (mm) remarks cutter, main drive system, the propulsion system, a spiral cutter 135003500 conveyor segment assembling machine double beam Shuangliang crane system and foam system 127612761 master control a control room and the operation of the main room, 9400400 beam lifting machine system, 8 high voltage cable box, sewage system, the belt drive system No. 6 Trailer circulating water drum, storage cylinder No. 5 Trailer

1.2 to the current technical means, you can choose from any structure to split the starting point. Points launching and machine origin compared to in terms of equipment mainly to increase the fault equipment connected to both ends of a desired extension of water, gas, hydraulic, electrical and other lines, and the grouting equipment or slag structure diversion transformation; in the aspect of construction is mainly reflected in the process of change.

According to the distribution characteristics of the main system of the shield, and considering the organizational efficiency of the production process, the method of dividing the sub body into the following 3 categories:

1) starting from the split of the host

2) from 1 to 4, the random position of the trailer is disconnected from the starting point

3) starting from the split of the 5 tow truck.

2, the characteristics of the different starting point of the production organization

Earth pressure balance shield has five key production processes: hanging tunnel boring, erector, sediment transport, segment lifting, synchronous grouting, five production links tightly and mutually button up, the combined effect of the production efficiency of the shield. Different separate launching methods will cause different characteristics of production process organization. According to the actual conditions of selecting appropriate body, can produce the best benefit.

Disconnect from the host 2.1 separate launching features

The host completely assembled well, equipment and supporting assembly connected to the bridge after the bridge should be as close to the ground, equipment originating well, in order to ensure the extension of pipeline utilization efficiency. The bridge between the host and device using extended pipeline connection, power, and supplies the control signal transmission, including 9 kinds of fluid pipeline, hydraulic oil pipe 18, a total of 6 electrical lines

Because there is no need to use synchronous grouting system, two grouting equipment timely grouting work, trolley two grouting equipment can be arranged to make the. Due to installed in No. 1 trailers and equipment on the bridge segment hoisting system can not be put into use in, therefore bracket of the front of the cart also need to make a segment hoisting and unloading point, use is more than or equal to 5T hoist segments lifting unloading, and then use the segment erector will be placed in marshalling track segment is dragged to the assembly position, assembling operation

2.2 extension line layout and use of the bracket trolley

From the host break open the body is divided into separate launching without conveyor belt, the slag bucket transport to transport to the spiral machine below the slag outlet is directly connected to the slag, so grouping transportation car battery can only hang set a flat so a flatbed truck, flatbed truck placed special slag hopper slag collecting bucket slag receiving. After the completion of the excavation, and then use the flat car transport vehicle segment, and because of space constraints, a only only hanging a segment.

Because only hang a flatbed truck, and only a special small slag bucket, so muck hanging and segment lifting two processes repeatedly interrupted to complete a driving cycle and need in the tunneling and lining lifting between the two production processes frequent conversion, convergence process takes a lot of time, this is main factor to restrict the tunneling efficiency.

2.3 starting characteristics from the 1 Trailer disconnect

1 Trailer and Trailer 2 with the extension of the pipeline to connect to the completion of the dynamic number of trailers to complete the power, control signals and supplies transmission. Because no belt drive device for No. 1 Trailer, the need to install a structure in the rear of the Trailer 1, to install the belt drive device, and used to regularly arrange the extension of the pipeline. Because of the space limitation, from No. 1 Trailer break open the launching way beginning can allow trains to hang two slag bucket, slag dump can also be used to transport segment, mortar can be through a pipeline, placed directly to No. 1 Trailer mortar tank, the latter with changes in space can increase marshalling car to improve the efficiency.

No. 1 Trailer after disconnection from, synchronous grouting of shield construction, segment hanging shipped two processing tasks can be accomplished using the shield itself, and can use standard slag dump, the process was interrupted between the number of times and the process number of conversions to reducing the number, therefore, the production efficiency is than from the host break open the launching way much higher.

Transformation from No.2 to No. 4 trailers between arbitrary position off to open the launching need of belt driving device, only just started driving train marshalling and number type and quantity and disconnected from the 1st of the separate launching vary, but a trailer full access to the portal circle, starting well can as the lifting transport well, at this time arrangement of train will due to the increase of space and become large and diverse, and from 1 to 4 Trailer any position off to open the launching way in production efficiency difference will be very weak.

No. 1 Trailer off to open the launching way mainly need to extend the pipeline of hydraulic and fluid (water, gas, foam, etc.), and 2 Trailer after breaking open the launching way, power cable, so choose separate launching way, considering the extended use of the pipeline cost and convenience of to carry out comprehensive comparison and selection.

2.4 starting characteristics from the 5 Trailer disconnect

For 6 Trailer only external circulating water drum, storage cylinder two major systems, does not affect the main shield function, so it can be temporarily installed. On the ground of temporary storage can be. Because only 6 Trailer, two times the cost of the installation of small, short cycle, compared with the whole machine, there is almost no difference in the equipment management.

The main functions of the shield are all installed in the main function system, so the effect is not obvious when the shield is broken. The space position of the slag discharging port has great influence on the arrangement of the marshalling yard, and it is the most important factor to restrict the production efficiency.

Different launching way, muck hoisting transport, segment lifting is is the key link of launching production efficiency and solve these difficulties also has a lot of ways, such as the production of slag groove and a small belt conveyor transport directly to the originating wellhead slip, making fork transport to the adjacent line transportation, but considering the limiting factor, reasonable arrangement of production process, in order to play maximum production efficiency, obtain the best economic benefit.

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