CN207245722U - A kind of built-in dual-fluid synchronous slip casting pipe-line system of shield machine shield tail - Google Patents

Abstract

The utility model provides a built-in double-fluid synchronous grouting pipeline system in the shield tail of a shield machine equipped with a flushing function, which includes a piston cylinder, a grouting pipeline channel and a water injection pipeline channel. The piston cylinder and the grouting pipeline The passages are arranged in parallel, and the inside is a hollow structure, and the end is provided with a piston block that can slide axially along the inner surface of the grouting cavity, and the end of the grouting pipeline channel is connected with the grouting cavity by a slope pipeline. Through the axial sliding of the piston cylinder, the communication between the grouting pipeline and the grouting cavity or the communication between the grouting pipeline and the water injection pipeline is realized. In this technical solution, by controlling the reciprocating motion of the piston cylinder, the synchronous grouting is controlled to communicate with the pipeline of the flushing hole or the synchronous grouting is connected with the pipeline of the grouting cavity, so as to achieve the effect of grouting or flushing. At the same time, in this scheme, the hardening time of the slurry can be adjusted by selecting different double-liquid mixing ratios to adapt to different engineering geology. At the same time, it is equipped with a flushing function, which can be flushed in time after use, which can effectively avoid pipeline blockage.

Description

A built-in double-fluid synchronous grouting pipeline system for shield tail of shield machine

technical field

The utility model relates to shield machine parts, in particular to a double-fluid synchronous grouting pipeline system.

Background technique

During shield construction, the quality of grouting is directly related to the quality of tunnel formation and the effect of ground settlement control. Tunnel grouting is to fill the gap around the shield tail of the segment when the segment is separated from the shield tail. After the segment is separated from the shield tail, the filler around the segment is not densely filled or the strength is not enough to support the upper soil, and the soil is prone to relaxation and collapse. Subsidence will lead to segment misalignment or water leakage, as well as ground subsidence, which will affect the quality of the tunnel and even endanger the ground buildings. In order to reduce and prevent settlement, during the excavation of the shield, a sufficient amount of slurry material should be injected synchronously behind the lining segment out of the shield tail as soon as possible to fill the annular building gap of the shield tail. Prevent tunnel deformation and control ground subsidence.

Stratum loss caused by shield tunneling, reconsolidation of disturbed or shear-damaged reshaped soil around shield tunnels, and infiltration of groundwater are important causes of settlement of ground surfaces, buildings, and pipelines. In the currently widely used single-liquid slurry injection, in order to ensure that the pipeline is not blocked, the proportion of the slurry is usually relatively thin, so the solidification time of the slurry is relatively long, and the shrinkage after solidification will be large, which will cause voids in the arch and cause large damage. hazards, increase the risk of excavation, and affect the quality of the tunnel.

In view of this, the utility model aims to provide a dual-liquid synchronous grouting pipeline system, which can adjust the grout hardening time by selecting different double-liquid mixing ratios, so as to adapt to different engineering geology and better control settlement.

Utility model content

The utility model aims to provide a built-in double-liquid synchronous grouting pipeline system in the shield tail of the shield machine equipped with a flushing function. In this system, the solidification time of the double liquid slurry is adjustable, the slurry has high viscosity and strong water retention, and the water-stopping effect on the formation is remarkable. This purpose is achieved through the following technical solutions:

A shield tail built-in dual-fluid synchronous grouting pipeline system includes a piston cylinder, a grouting pipeline channel and a water injection pipeline channel. The piston cylinder is arranged parallel to the channel of the grouting pipeline, and the inside is a hollow structure for pipeline flushing. The end of the piston cylinder is provided with a piston block that can slide axially along the grouting cavity, the end of the grouting pipeline channel is a slope pipeline, and the slope pipeline is connected with the grouting cavity. Through the axial sliding of the piston cylinder, the communication between the grouting pipeline channel and the grouting cavity or the communication between the grouting pipeline channel and the water injection pipeline channel is realized.

Further, the piston cylinder is provided with a sensor and a limit device.

Further, a proximity switch is provided between the piston cylinder and the grouting pipeline channel.

Further, the piston cylinder is controlled by a gear oil pump to push the piston block to make a linear reciprocating motion along the grouting cavity.

The utility model is generally installed in a way of one use and one standby, and is symmetrically arranged between the semicircular shield tail and the segment on the shield machine center line of the shield machine.

In this technical solution, by controlling the reciprocating motion of the piston cylinder, the synchronous grouting is connected with the pipeline of the flushing hole or the synchronous grouting is connected with the pipeline of the grouting cavity, so as to achieve the effect of grouting or flushing. At the same time, in this scheme, the hardening time of the slurry can be adjusted by selecting different double-liquid mixing ratios to adapt to different engineering geology. At the same time, it is equipped with a flushing function, which can be flushed in time after use, which can effectively avoid pipeline blockage. The dual-liquid simultaneous injection Slurry technology, the injected slurry has the advantages of short solidification time, high viscosity, strong water retention, and remarkable water-stopping effect on the formation.

Description of drawings

Fig. 1 is a schematic diagram of a shield tail built-in double-fluid synchronous grouting pipeline system of the utility model.

Fig. 2 is a schematic diagram of the installation position of the shield tail built-in dual-fluid synchronous grouting pipeline system of the utility model.

FIG. 3 is a partially enlarged view of part A in FIG. 2 .

Detailed ways

Example 1:

This embodiment provides a shield tail built-in dual-liquid synchronous grouting pipeline system, including a piston cylinder 14, a grouting pipeline channel 11 and a water injection pipeline channel 13, the piston cylinder 14 and the grouting pipeline The channel 11 is arranged in parallel, and the inside is a hollow structure. The outer end is provided with an outer cavity 16 fixed to the tail of the shield, and the end is provided with a piston block 15 that can slide axially along the inner surface of the outer cavity. The water injection pipeline channel 13 passes through the It has a hollow structure and the end channel is blocked by the piston block 15 . The end of the grouting pipeline channel is a slope pipeline 12 , and the grout outlet of the slope pipeline 12 is connected with the outer cavity 16 .

Further, the piston cylinder 14 is provided with a sensor and a limit device.

Further, a proximity switch is provided between the piston cylinder 14 and the grouting pipeline channel 11 .

Further, the piston cylinder is controlled by a gear oil pump to push the piston block to make linear reciprocating motion along the outer cavity.

Example 2:

The utility model is installed in a way of one use and one standby, as shown in Figure 2, the shield machine includes two sets of synchronous grouting pipeline systems 1 described in Embodiment 1, and the two sets of pipeline systems 1 are shielded The center line of the machine is symmetrically set between the semicircular shield tail 2 and the segment on the shield machine.

Claims (5)

1. a kind of built-in dual-fluid synchronous slip casting pipe-line system of shield machine shield tail, including piston cylinder, grouting pipeline passage and water filling Pipe passage, the piston cylinder are arranged in parallel with grouting pipeline passage, and inside is hollow structure, for flushing of pipeline, the piston Cylinder end is equipped with can be along slip casting cavity inner surface piston block in axial sliding；The end of grouting pipeline passage is gradient pipeline, institute Gradient pipeline is stated with slip casting cavity to be connected；By sliding axially for piston cylinder, the connection of grouting pipeline passage and slip casting cavity is realized The unicom of logical or grouting pipeline passage and water injecting pipeline passage.

A kind of 2. built-in dual-fluid synchronous slip casting pipe-line system of shield machine shield tail as claimed in claim 1, it is characterised in that institute State piston cylinder and be equipped with sensor and limiting device.

A kind of 3. built-in dual-fluid synchronous slip casting pipe-line system of shield machine shield tail as claimed in claim 1, it is characterised in that institute State and be equipped between piston cylinder and grouting pipeline passage close to switch.

A kind of 4. built-in dual-fluid synchronous slip casting pipe-line system of shield machine shield tail as claimed in claim 1, it is characterised in that institute State piston cylinder to be controlled by gear oil pump, promote piston block to do straight reciprocating motion along slip casting cavity.

5. a kind of dual-fluid synchronous slip casting shield machine, it is characterised in that the shield machine includes two sets of shields as claimed in claim 1 The built-in dual-fluid synchronous slip casting pipe-line system of structure machine shield tail, the shield tail of shield machine upper semi-circle is symmetrically disposed on shield machine center line Between section of jurisdiction.