CN217632435U - Karst detection device for shield tunnel - Google Patents

Abstract

The utility model discloses a shield tunnel karst detection device, which comprises a detection component arranged between a shield machine cutter head and a shield machine cutter head main driving mechanism; the detection assembly comprises a cylinder body, a detection rod which can stretch to the outer side of the cylinder body is arranged in the cylinder body, a detection disc is arranged at the top of the detection rod, and a detection probe is arranged on the end plane of the detection disc; the shield constructs still to offer the through-hole that is used for the gauge stick to pass through on the quick-witted blade disc of shield, the shield constructs the owner side that the quick-witted blade disc set up the cutter and still is provided with the mounting groove, installs the self-resetting closing cap that is used for the shutoff through-hole in the mounting groove. The detection device is combined with the shield machine, and further has the technical characteristic of measurement while drilling.

Description

Karst detection device for shield tunnel

Technical Field

The utility model relates to a tunnel geotechnical engineering technical field specifically is a shield tunnel karst detection device.

Background

The karst cave is one of the most common karst forms encountered in tunnel construction in karst areas, and the hidden karst cave along the tunnel is a main disaster source of tunnel construction risks. When engineering construction is carried out in a karst area, the integrity of bedrock is damaged by the karst, so that the strength and bearing capacity of a rock body are greatly reduced, deformation damage such as ground collapse and uneven settlement can be caused frequently, and the safety of the engineering construction is influenced.

Before tunnel construction, all can advance survey the solution cavity in order to reduce and eliminate the risk, among the prior art, adopt the probing mode to survey the solution cavity more, because the solution cavity development has very strong randomness, so often after having beaten countless drilling along the tunnel construction and having surveyed, still can't be complete surveys the solution cavity, can't reliably survey, leads to some construction sites to appear geological destruction or even causes the accident.

Based on this, how to make up for the detection incompleteness of the advanced detection and reduce the construction risk on the premise of combining the advanced detection is a technical problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a shield tunnel karst detection device, and this detection device combines together through constructing the machine with the shield, and then has the technical characterstic along with surveying along with following the boring.

The purpose of the utility model is realized mainly through the following technical scheme: the shield tunnel karst detection device comprises a detection assembly arranged between a shield machine cutter head and a shield machine cutter head main driving mechanism; the detection assembly comprises a cylinder body, a detection rod which can stretch to the outer side of the cylinder body is arranged in the cylinder body, a detection disc is arranged at the top of the detection rod, and a detection probe is arranged on the end plane of the detection disc; the shield constructs still to offer the through-hole that is used for the gauge stick to pass through on the quick-witted blade disc of shield, the shield constructs the owner side that the quick-witted blade disc set up the cutter and still is provided with the mounting groove, installs the self-resetting closing cap that is used for the shutoff through-hole in the mounting groove.

Based on the technical scheme, the outer side of the bottom of the cylinder body is provided with a connecting block with a connecting hole, and the cylinder body is connected with a main driving mechanism of a cutter head of the shield tunneling machine through a bolt penetrating through the connecting hole; the top of the cylinder is provided with an opening for the extension of the detection rod, the cylinder is provided with an external thread outside the opening, and the external thread is in threaded fit with a thread tightening sleeve to tightly press and seal the cylinder on the back side of the cutter head of the shield tunneling machine; the end part of the back side of the cutter head of the shield machine, which is tightly jacked by the threaded jacking sleeve, is also provided with a sealing ring.

Based on the technical scheme, a detection installation cavity and an electrical appliance installation cavity are formed in the cylinder body through the partition plate; a multi-section electric push rod is arranged in the detection mounting cavity, and the end part of the push rod of the multi-section electric push rod is fixed with the detection rod; the electric appliance installation cavity is internally provided with a storage battery, and the detection probe and the multi-section electric push rod are electrically connected with the storage battery.

Based on above technical scheme, the barrel bottom still runs through the setting and with the walking line hole of electrical apparatus installation cavity intercommunication.

Based on above technical scheme, the inside automatic winder that still is provided with of barrel, the signal line of probe pass through automatic winder after convoluteing with the battery electricity is connected.

Based on above technical scheme, from the closing cap that restores to the throne be provided with the pivot, the pivot is rotated and is connected the main side that the shield constructs the quick-witted blade disc and set up the cutter, just around having the torsional spring in the pivot, two tip of torsional spring push up respectively tightly on from the closing cap that restores to the throne and the shield constructs quick-witted blade disc.

Based on above technical scheme, the probe rod side still is provided with the connecting plate perpendicularly, is connected with the litter that sets up with probe rod parallel interval on the connecting plate, the litter is used for blockking when the probe rod stretches out from restoring to the throne the closing cap and reseing.

Based on the technical scheme, the length of the connecting plate is larger than the radius of the detection disc.

Based on the technical scheme, the detection probe is one or two of an ultrasonic probe and a geological radar probe.

Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model discloses a to set up the detection subassembly between shield constructs quick-witted blade disc and shield and constructs quick-witted blade disc main drive mechanism for stretch out the blade disc in order to survey when the shield constructs the machine shut down and overhauls, thereby can follow along with surveying based on the probing demand, thereby compensate in advance survey the in-process because of the karst cave survey incomplete omission, easily lead to the defect of construction problem, can further improve karst area detection precision and construction safety nature.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic view of the installation structure of the present invention;

fig. 2 is a partial cross-sectional view of the mounting structure of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

fig. 4 is a schematic structural diagram of the present invention;

FIG. 5 is a diagram of the state structure of the present invention during probing;

FIG. 6 is an enlarged view of the structure at B in FIG. 5;

FIG. 7 is a schematic view of the self-resetting closure;

the reference numerals in the drawings denote:

1. a cutter head of the shield tunneling machine; 2. a cutter head main driving mechanism of the shield tunneling machine; 3. a detection component; 4. a barrel; 5. a probe rod; 6. detecting the disc; 7. a probe is detected; 8. a through hole; 9. a cutter; 10. mounting grooves; 11. self-resetting capping; 12. connecting blocks; 13. the screw thread tightly pushes the sleeve; 14. a seal ring; 15. a soil bin; 16. a partition plate; 17. detecting the installation cavity; 18. an electrical appliance mounting cavity; 19. a multi-section electric push rod; 20. a battery; 21. a wiring hole; 22. an automatic winder; 23. a rotating shaft; 24. a torsion spring; 25. a connecting plate; 26. and (4) sliding the rod.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

As shown in fig. 1 to 7, the present embodiment provides a shield tunnel karst detecting apparatus, which includes a detecting assembly 3 disposed between a shield machine cutterhead 1 and a shield machine cutterhead main driving mechanism 2; the detection assembly 3 comprises a cylinder body 4, a detection rod 5 which can stretch to the outer side of the cylinder body 4 is arranged in the cylinder body 4, a detection disc 6 is arranged at the top of the detection rod 5, and a detection probe 7 is arranged on the end plane of the detection disc 6; still offer the through-hole 8 that is used for detecting rod 5 to pass through on the shield constructs quick-witted blade disc 1, the shield constructs quick-witted blade disc 1 and sets up the main side of cutter 9 and still is provided with mounting groove 10, installs the self-resetting closing cap 11 that is used for shutoff through-hole 8 in the mounting groove 10.

In the prior art, advanced detection is carried out before tunnel construction to solve some geological problems, such as karst detection and advanced treatment in karst areas, and the safety and geological stability of subsequent construction are convenient, advanced detection is also required before the construction of the current shield tunnel, but all karst caves cannot be detected due to the advanced detection, and the karst caves can be continuously developed and have strong randomness, so that construction problems or geological problems can be caused by the fact that undetected karst caves can be encountered during the construction of the shield tunnel, the current shield machine mostly adopts an earth pressure type shield machine, the earth pressure type shield machine can generally advance by 1-3 meters per hour, and the shield machine can be stopped and overhauled basically for about 2 hours, so that the problem of construction danger caused by incomplete detection of the karst caves can be solved, if the time for stopping and overhauling of the shield machine can be effectively utilized, the safety construction is facilitated.

Based on this, this embodiment is through setting up detection subassembly 3 between shield structure machine blade disc 1 and shield structure machine blade disc main drive mechanism 2, utilize and to stretch out to the detection probe 7 that shield structure machine blade disc 1 set up the main side of cutter 8, can utilize detection probe 7 to survey the tunnel excavation direction when the shield structure machine is shut down to overhaul, thereby survey while being under construction, guarantee that the solution cavity that does not survey when the advance survey in the work progress can survey in advance, thereby can carry out the preliminary treatment based on the detection result, further improve construction safety.

Specifically, during this embodiment uses, when the shield constructs the machine and shuts down when overhauing, shield constructs quick-witted blade disc 1 stall or moves back a certain distance, detecting rod 5 stretches out and draws back and to in the through-hole 8 this moment, and stretch out to the main side that shield constructs quick-witted blade disc 1 and set up cutter 9 behind the self-reset closing cap 11 in the liftout mounting groove 10, when the detection dish 6 on detecting rod 5 top tight or push in to the tunnel face, detecting probe 7 contacts with the face rock stratum promptly this moment, can survey, after surveying the completion, detecting rod 5 reverts to the home position, then self-reset closing cap 10 is with shutoff through-hole 8 automatically. This embodiment is through utilizing the shield structure machine rational in infrastructure interpolation to survey subassembly 3 to survey when the shield structure machine is shut down to overhaul through surveying subassembly 3, do not influence the shield structure machine normal use promptly, also can ensure the security that the shield structure machine of next time digs into the in-process, have fine application prospect.

As a further structural description of the detection assembly 3, a connecting block 12 with a connecting hole is arranged on the outer side of the bottom of the cylinder 4, and the cylinder 4 is connected with the main driving mechanism 2 of the cutter head of the shield tunneling machine through a bolt penetrating through the connecting hole; the top of the cylinder body 4 is provided with an opening for the detection rod 5 to extend out, the cylinder body 4 is provided with an external thread at the outer side of the opening, and the external thread is in threaded fit with a threaded jacking sleeve 13 so as to jack and seal the cylinder body 4 at the back side of the shield tunneling machine cutter head 1; and the end part of the back side of the shield tunneling machine cutter head 1 tightly jacked by the thread jacking sleeve 13 is also provided with a sealing ring 14.

Considering the problem of assembling and disassembling the detection assembly 3, in this embodiment, the end of the cylinder 4 connected with the main driving mechanism 2 of the cutter head of the shield tunneling machine is provided with a plurality of connecting blocks 12 with connecting holes, the cylinder 4 is detachably installed on the main driving mechanism 2 of the cutter head of the shield tunneling machine by using connecting hole matching bolts in the connecting blocks 12, and the problem of convenient assembling and disassembling is further solved, meanwhile, due to the installation requirement of the cylinder 4, an installation gap is required to be reserved between the open end of the cylinder 4 and the back side of the cutter head 1 of the shield tunneling machine, but because the soil bin 15 of the shield tunneling machine is arranged between the cutter head 1 of the shield tunneling machine and the main driving mechanism 2 of the cutter head of the shield tunneling machine, if the installation gap is not processed, rock soil in tunneling easily enters the cylinder 4 through the installation gap, and then the detection probe 7 is damaged by extrusion, so that in this embodiment, the outer side of the open end of the cylinder 4 is further provided with external threads and matched with the thread tightening sleeve 13, the thread tightening sleeve 13 can be screwed and tightened on the back side of the shield tunneling machine 1, thereby ensuring that the rock soil can not enter the cylinder 4, and the cylinder can be fixed better. Further, the threaded jacking sleeve 13 can further seal the cylinder body 4 through a sealing ring 14, so that the isolation effect is improved.

It should be noted that the screw tightening sleeve 13 needs to be installed on the external thread before the barrel 4 is installed and screwed to the end surface not exceeding the end surface of the opening end of the barrel 4, and then the screw tightening sleeve 13 can be further operated and tightened after the barrel 4 is installed.

In the above embodiment, the detecting probe 7 can be a wireless probe, so that the problem of signal transmission is not needed to be considered when the device is used, only the power supply requirement is needed to be met, and the power supply requirement can be supplied by a power supply device arranged in the cylinder 4, such as a storage battery, of course, because the device is constructed underground during tunnel construction, the possible signal transmission effect of wireless signals is poor, except that a signal receiving device is arranged close to the main driving mechanism 2 of the cutter head of the shield tunneling machine, the detecting probe 7 can also realize wired signal transmission by adopting a wired probe, and further the signal transmission effect can be ensured. It should be noted that, the signal receiving device and the signal processing device after the probing of the probing probe 7 belong to the prior art, and as a person skilled in the art can use the probe signal receiving or processing device of the prior art to obtain the relevant data after the probing.

Based on this, as an implementation mode, the inside of the cylinder 4 of the embodiment forms a detection installation cavity 17 and an electrical installation cavity 18 through a partition 16; a multi-section electric push rod 19 is arranged in the detection installation cavity 17, and the end part of the push rod of the multi-section electric push rod 19 is fixed with the detection rod 5; the electrical installation cavity 18 is internally provided with a storage battery 20, and the detection probe 7 and the multi-section electric push rod 19 are electrically connected with the storage battery 20.

Be used for driving feeler lever 5 through multisection electric putter 19 in this embodiment and stretch out and draw back conveniently, and multisection electric putter 19's flexible length is longer, can satisfy the detection demand, simultaneously through the separation setting of surveying installation cavity 17 and electrical apparatus installation cavity 18, can ensure that battery 20 can be better protects, avoid outside ground to get into electrical apparatus installation cavity 18 and cause battery 20 short circuit, the electric leakage etc., guarantee its permanent use, and accessible battery 20 supplies power to probing probe 7 and multisection electric putter 19, ensure the two normal use. Further, the partition 16 may be provided with a small hole for routing the circuit lines of the probe 7 and the multi-stage power push rod 19.

Of course, considering that the shield machine has a long service life, the detection assembly 3 is inconvenient to detach after excavation, and needs to be additionally excavated into a channel or detached after the tunnel is completed, so that the requirement on power supply of a storage battery is high, and the cost is high. Therefore, in this embodiment, the bottom of the cylinder 4 further penetrates through the wiring hole 21 which is arranged and communicated with the electrical appliance installation cavity 18. Can be used for walking the line in the wiring hole 21, foretell probe 7, multisection electric putter 19, the circuit line of battery 20 all can walk the line through wiring hole 21, thereby walk the line through setting up corresponding line structure cooperation on shield structure machine blade disc main drive mechanism 2, and then when shield structure machine shut down, can supply power or charge the use to above-mentioned electrical part through the circuit of walking the line of wiring hole 21, and still can walk the line through wiring hole 21 when probe 7 is wired probe and walk the line, or be used for controlling the flexible and flexible length's of multisection electric putter 19 signal line, the stability of having made things convenient for detection subassembly 3, long-term use. It should be noted that when the corresponding routing structure is arranged on the main driving mechanism 2 of the cutter head of the shield tunneling machine, a corresponding sealing structure needs to be designed to ensure the rock-soil isolation, such as adding a sealing cover and a labyrinth sealing structure.

As a further supplement to the above embodiment, when the probing probe 7 is wired, the probing probe 7 will extend and retract along with the probing rod 5, so the circuit wire thereof needs to be automatically wound to avoid the damage of the circuit. In this respect, in this embodiment, an automatic winder 22 is further provided inside the cylinder 4, and the signal line of the probe 7 is wound by the automatic winder 22 and then electrically connected to the battery 20. Therefore, the automatic winder 22 can ensure that the circuit line of the detection probe 7 can be automatically wound and unwound when the detection probe extends and retracts along with the detection rod 5, and the circuit protection and management are convenient.

Further, in order to further ensure the detection effect, the detection probe 7 may be one or both of an ultrasonic probe and a geological radar probe. Therefore, the type of the probe can be selected according to actual construction requirements, and the type of the probe 7 can be other types of probes, such as seismic wave probes and the like.

The self-resetting sealing cover 11 is mainly used for sealing the through hole 8, is used for isolating the cylinder 4 and providing a supporting force for the tunnel face of the cutter head 1 of the shield tunneling machine, and can automatically reset and seal the through hole 8 when the detection rod 5 retracts into the cylinder 4 after being pushed open by the detection rod 5.

Specifically, from the closing cap 11 that restores to the throne be provided with pivot 23, pivot 23 rotate connect shield constructs the owner side that the machine cutter dish 1 set up cutter 9, just it has torsional spring 24 to wind in the pivot 23, and two tip of torsional spring 24 push up respectively tightly on from the closing cap 11 that restores to the throne and the shield constructs machine cutter dish 1. When the self-resetting sealing cover 11 rotates, the self-resetting sealing cover rotates around the rotating shaft 23 and compresses the torsion spring 24, the self-resetting sealing cover 11 is in an open state under the blocking of the detection rod 5, when the detection rod 5 finishes detecting and returns to the barrel 4, the self-resetting sealing cover 11 loses the blocking, and the torsion spring 24 is covered on the through hole 8 through the rotation of the torsion spring 24 under the self-resetting elastic force effect.

Due to the arrangement of the detection disc 6, the detection rod 5 may be unable to return by the self-returning cover 11 when retracting the cylinder 4, so in this embodiment, a connecting plate 25 is further vertically arranged on the side surface of the detection rod 5, a sliding rod 26 is connected to the connecting plate 25 and is arranged parallel to the detection rod 5 at an interval, and the sliding rod 26 is used for blocking the self-returning cover 11 when the detection rod 5 extends out. In the embodiment, the sliding rod 26 is arranged, when the detection rod 5 is in the extending process, the sliding rod 26 is always in contact with the self-resetting sealing cover 11 and blocks the resetting of the self-resetting sealing cover 11, so that when the detection rod 5 is retracted, the sliding rod 26 can block the self-resetting sealing cover 11 until the detection disc 6 enters the covered area of the self-resetting sealing cover 11, and the detection rod 5 cannot be blocked and influenced when the self-resetting sealing cover 11 is reset. Specifically, the length of the connecting plate 25 is greater than the radius of the detection disc 6, so that the detection disc 6 can further enter a reset area of the self-resetting sealing cover 11 when retracting, and cannot be blocked by the self-resetting sealing cover 11, and the detection rod 5 can completely enter the barrel 4 without being blocked.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. The shield tunnel karst detection device is characterized by comprising a detection assembly arranged between a shield machine cutter head and a shield machine cutter head main driving mechanism;

the detection assembly comprises a cylinder body, a detection rod which can stretch to the outer side of the cylinder body is arranged in the cylinder body, a detection disc is arranged at the top of the detection rod, and a detection probe is arranged on the end plane of the detection disc;

the shield constructs still to offer the through-hole that is used for the gauge stick to pass through on the quick-witted blade disc of shield, the shield constructs the owner side that the quick-witted blade disc set up the cutter and still is provided with the mounting groove, installs the self-resetting closing cap that is used for the shutoff through-hole in the mounting groove.

2. The shield tunnel karst detecting device of claim 1, wherein a connecting block with a connecting hole is arranged on the outer side of the bottom of the cylinder body, and the cylinder body is connected with a main driving mechanism of a cutter head of the shield tunneling machine through a bolt penetrating through the connecting hole;

the top of the cylinder is provided with an opening for the extension of the detection rod, the cylinder is provided with an external thread outside the opening, and the external thread is in threaded fit with a threaded jacking sleeve to jack and seal the cylinder on the back side of the cutter head of the shield tunneling machine;

the end part of the back side of the cutter head of the shield machine, which is tightly jacked by the threaded jacking sleeve, is also provided with a sealing ring.

3. The shield tunnel karst detecting device of claim 1 or 2, wherein a detection installation cavity and an electrical installation cavity are formed in the cylinder through a partition plate;

a plurality of sections of electric push rods are arranged in the detection installation cavity, and the end parts of the push rods of the plurality of sections of electric push rods are used for fixing the detection rods;

the electric appliance mounting cavity is internally provided with a storage battery, and the detection probe and the multi-section electric push rod are electrically connected with the storage battery.

4. The shield tunnel karst detecting device of claim 3, wherein the bottom of the barrel body is further penetrated by a wiring hole which is communicated with the electrical installation cavity.

5. The shield tunnel karst detecting device of claim 3, wherein an automatic winder is further arranged inside the barrel, and the signal wire of the detecting probe is electrically connected with the storage battery after being wound by the automatic winder.

6. The shield tunnel karst detecting apparatus of claim 1, wherein the self-resetting cover is provided with a rotating shaft, the rotating shaft is rotatably connected to the main side of the shield machine cutterhead provided with the cutter, and the rotating shaft is wound with a torsion spring, and two ends of the torsion spring respectively abut against the self-resetting cover and the shield machine cutterhead.

7. The shield tunnel karst detecting device of claim 6, wherein a connecting plate is vertically arranged on the side face of the detecting rod, a sliding rod is connected to the connecting plate and arranged in parallel with the detecting rod at an interval, and the sliding rod is used for blocking the self-resetting sealing cover from resetting when the detecting rod extends out.

8. The shield tunnel karst detecting device of claim 7, wherein the length of the connecting plate is greater than a radius of the probe disk.

9. The shield tunnel karst detecting device of claim 1, wherein the detecting probe is one or both of an ultrasonic probe and a geological radar probe.

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