CN117605032A - Waterproof slip casting device of assembled open cut tunnel seam - Google Patents

Abstract

The invention belongs to the technical field of tunnel waterproofing, and particularly relates to an assembly type open cut tunnel joint waterproof grouting device. The end of the piston cylinder in the extending direction of the first piston is provided with an aggregate chamber communicated with the piston cylinder, the end of the aggregate chamber is provided with a grouting pipe, the end of the grouting pipe is provided with a grouting head, the outer side of the grouting head is provided with an annular air bag, the inner side surface of the annular air bag is fixedly connected to the outer surface of the grouting head, the outer side surface of the end of the piston cylinder in the retracting direction of the first piston is provided with a first exhaust hole, the first exhaust hole is provided with a first exhaust pipe, the exhaust direction of the first exhaust pipe is sequentially provided with a first one-way exhaust valve and a pressure relief valve, one end of the first exhaust pipe is communicated with the first exhaust hole, and the other end of the first exhaust pipe is communicated with the annular air bag. The technical scheme is used for solving the problems that in the prior art, the connection mode of a grouting pipe before grouting in a grouting hole is complex, the grouting efficiency is low, and the grouting workload of a joint is increased.

Description

Waterproof slip casting device of assembled open cut tunnel seam

Technical Field

The invention belongs to the technical field of tunnel waterproofing, and particularly relates to an assembly type open cut tunnel joint waterproof grouting device.

Background

Leakage water is always the first major illness in tunnel engineering, which severely affects the quality and service life of the engineering. Although the waterproof and anti-seepage of tunnel engineering are paid attention to by engineering technicians, some waterproof technologies have high construction cost, inconvenient operation, unsatisfactory waterproof effect and poor durability. Once the structure leaks, the tunnel is seriously affected, and the repairing process consumes a great deal of manpower, material resources and financial resources.

Moreover, the fabricated tunnel structure is a novel innovative technology, the implementation of the fabricated tunnel realizes the standardized production of open-cut tunnel lining, the quality of tunnel engineering is greatly improved, and corresponding waterproof measures are also innovated according to the innovation of the structure, so that the construction efficiency and the construction precision of a tunnel waterproof system are improved, and the engineering progress is accelerated.

Wherein after lining up the completion, need carry out slip casting waterproofing operation to the seam, in prior art, in the slip casting, generally need on-line installation stagnant water joint in the slip casting hole, then just can carry out the slip casting operation after connecting through slip casting pipe and stagnant water joint, still need carry out the shutoff to stagnant water joint after the slip casting is accomplished, the mode that this kind of slip casting pipe and slip casting hole are connected is comparatively complicated, and the in-process need go on the slip casting operation through a plurality of processes, not only slip casting inefficiency, still very big increase the work load of seam slip casting.

Disclosure of Invention

Therefore, the invention aims to provide an assembled open-cut tunnel joint waterproof grouting device, which is used for solving the problems that in the prior art, the grouting efficiency is low and the joint grouting workload is increased due to the complex connection mode of grouting pipes before grouting holes.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides an assembled open cut tunnel seam waterproof grouting device, includes the mounting panel, be equipped with the piston cylinder on the mounting panel, be equipped with first piston in the piston cylinder, be equipped with the actuating mechanism that is used for driving its removal on the first piston, the tip of piston cylinder is equipped with the room that gathers materials with it in the first piston direction of stretching out, be equipped with the slip casting pipe on the tip of gathering materials the room, the tip of slip casting pipe is equipped with the slip casting head, the outside of slip casting head is equipped with annular gasbag, the medial surface fixed connection of annular gasbag is on the surface of slip casting head, be equipped with first exhaust hole on the piston cylinder end lateral surface of first piston withdrawal direction, be equipped with first blast pipe on the first exhaust hole, be equipped with first one-way discharge valve and relief valve in order on the exhaust direction of first blast pipe, the one end and the first exhaust hole switch-on of first blast pipe, the other end and annular gasbag switch-on.

The working principle of the technical scheme is as follows:

when injecting slurry shutoff to the tunnel seam after the assembly is accomplished, firstly place the slip casting head of this device in the slip casting hole that seam crossing was reserved, then open the rotating electrical machines, first piston can compressed air at the in-process of motion, compressed air gets into annular gasbag in through first blast pipe, aerify annular gasbag, simultaneously under the effect of first check valve and relief valve, can make the inside corresponding atmospheric pressure that keeps of annular gasbag, can block in the slip casting hole simultaneously when annular gasbag inflation, the fixing to the slip casting head has been accomplished promptly, can begin to carry out the slip casting, simultaneously only need open the relief valve and carry out the exhaust can take out the slip casting head after the slip casting is accomplished.

Further, actuating mechanism includes driving motor, belt pulley, belt, pivot, mounting bracket, bent axle, head rod and telescopic shaft, the mounting bracket symmetry is fixed in on the mounting panel, the pivot rotates to be connected on the mounting bracket that the symmetry set up, the upper portion of bent axle both sides face is fixed in the pivot, the one end rotation of head rod is connected on bent axle middle part lower extreme, the other end rotation of head rod is connected in the one end of telescopic shaft, the one end fixed connection of telescopic shaft is in the middle part of first piston, all be equipped with the belt pulley on the one end of pivot and the telescopic motor, the belt twines on two on the belt pulley, driving motor fixed connection is on the mounting panel.

The working principle of the driving mechanism is as follows:

the driving motor drives the rotating shaft to rotate through the belt and the belt pulley, the rotating shaft drives the crankshaft to rotate, and the crankshaft rotates to drive the telescopic shaft to do linear telescopic motion, so that the first piston can be driven to do reciprocating motion in the piston cylinder.

Further, the outside of telescopic shaft is equipped with the hollow shaft, the hollow shaft cup joints on the telescopic shaft, be equipped with the second piston on the one end of telescopic shaft, the middle part of second piston slides and cup joints on the telescopic shaft, and the second piston is located the piston cylinder, the other end bilateral symmetry of hollow shaft is equipped with the second connecting rod, the one end of second connecting rod rotates and connects in the both sides of hollow shaft, the other end of second connecting rod all rotates and connects in the upper portion of bent axle, and its advantage lies in, sets up the effect of second piston and hollow shaft in, guarantees telescopic shaft reciprocating motion's stationarity, cup joints simultaneously on the telescopic shaft, can further avoid the probability of broken damage in the telescopic shaft motion.

Meanwhile, the connecting positions of the telescopic shaft and the hollow shaft are different from each other, namely, when the crankshaft rotates, the telescopic shaft moves forward, and the hollow shaft moves backward when the telescopic shaft moves forward, namely, collision interference between the first piston and the second piston is avoided.

Further, be equipped with the second exhaust hole between the extension extreme position of first piston's the extension extreme position, be equipped with the second blast pipe on the second exhaust hole, be equipped with the one-way discharge valve of second on the second blast pipe, the one end and the second exhaust hole intercommunication of second blast pipe, the other end of second blast pipe communicates in first blast pipe, and its advantage lies in, because first piston and second piston are when moving, when first piston is retracted and second piston stretches out, can extrude the air between the two, and the air pours into in the first blast pipe through the second blast pipe promptly, can aerify the gasbag, supplementary gasbag contact pressure between grouting hole.

It is further to be noted that when the first piston is retracted, air can be extruded between the first piston and the second piston to inflate the inside of the annular air bag, when the first piston is extended, the second piston is retracted, namely, air extruded between the ends of the cylinder body is used for inflating the annular air bag, namely, no matter whether the first piston is in the process of telescopic grouting or retracting grouting, air can be injected into the inside of the annular air bag, the contact effect between the annular air bag and the grouting hole wall is ensured, and therefore the problem that a grouting head falls off is avoided, but the problem that the air bag is continuously pressurized to cause damage is avoided due to the existence of the pressure release valve.

Further, be equipped with the header tank on the mounting panel, be equipped with the drain pipe on the delivery port of header tank, the one end and the delivery port intercommunication of header tank of drain pipe, the other end and first blast pipe intercommunication, and the intercommunication position is located between first one-way discharge valve and the relief valve, be equipped with the control valve of its break-make on the drain pipe, the tip and the annular chamber of first blast pipe can dismantle the connection, its advantage lies in, after the slip casting is accomplished, accessible takes off first blast pipe in annular gasbag's connection, then because the fast flow of the high-pressure gas in the first blast pipe, then can form the negative pressure in the junction of drain pipe and first blast pipe, then can absorb the water in the header tank, then can wash the slip casting hole outside, and what need be explained this moment is, if still has thick liquid in the hopper, then can place the slip casting head in the hopper, if not have thick liquid, can also place the tip of first blast pipe in the hopper, wash the hopper inside, liquid after the while is followed slip casting pipe and is discharged, still can wash, can be washed to the pipe, of course, the pipe is blocked up to the pipe when using the pipe is connected to the piece when avoiding the pipe to be cut down, the preferred.

Further, a plurality of annular water stop bars which are expanded by water are sleeved on the outer side face of the annular air bag in a sliding manner, and the annular water stop bars are beneficial in that firstly, through extrusion of the air bag in expansion, the annular water stop bars are tightly abutted against the inner wall of the grouting hole, so that the sealing effect of the grouting hole is improved, the grouting effect can be improved, meanwhile, the friction force on the inner wall of the grouting hole is increased, the air bag can form a bulge between the adjacent annular water stop bars to be in contact with the grouting hole, the blocking effect on the air bag can be achieved, namely the problem that the air bag slides out of the grouting hole is further avoided, meanwhile, when the air bag is fully taken out by grouting, the water in the slurry is in contact with the annular water stop bars, the annular water stop bars can absorb water to expand, and the grouting hole can be plugged (the number of the reserved grouting holes is a plurality, and slurry is generally gradually injected from bottom to top, and can be determined according to actual conditions).

Further, the automatic feeding device also comprises a hopper arranged above the material collecting chamber, a material discharging pipe for connecting the hopper and the material collecting chamber is arranged between the hopper and the material collecting chamber, a one-way material discharging valve is arranged on the material discharging pipe, and when the first piston is retracted, the negative pressure in the piston cylinder is used for opening the one-way material discharging valve for feeding.

Further, the grouting pipe and the first exhaust pipe are flexible hoses.

Further, a plurality of universal wheels for moving the mounting plate are arranged below the mounting plate.

The invention has the beneficial effects that:

(1) The annular air bag, the first exhaust pipe, the first one-way valve and the pressure release valve are arranged, so that the annular air bag can be inflated by skillfully utilizing the pressure change in the piston cylinder, and is clamped in the grouting hole, and grouting of the grouting hole is realized; (2) The water collection tank and the drain pipe are arranged, so that the water can be sucked by using the gas flowing at high speed in the first exhaust pipe and then discharged, and the outer side of the grouting hole or the grouting pipe and the like are cleaned; (3) The arrangement of the annular water stop strip can increase friction force, prevent the annular air bag from falling out of the grouting hole, and can also plug the grouting hole by absorbing water after grouting is completed.

Drawings

In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic cross-sectional view of a front view of the present invention;

FIG. 4 is an enlarged partial schematic view of FIG. 3A;

FIG. 5 is a schematic view of the annular bladder of the present invention acting within a grouting bore;

FIG. 6 is a standard cross-section of an assembled segment of a prefabricated assembled structure;

FIG. 7 is a water-proof view of a prefabricated assembly section seam;

FIG. 8 is a diagram of a pre-fabricated assembled structure assembly section sponge rubber layout.

The figures are marked as follows:

the device comprises a mounting plate 1, a grouting pipe 2, a grouting head 3, a piston cylinder 4, a hopper 5, a discharge pipe 6, a telescopic shaft 7, a first piston 8, a second piston 9, a hollow shaft 10, a second exhaust pipe 11, a first exhaust pipe 12, a second connecting rod 13, a crankshaft 14, a first connecting rod 15, a mounting frame 16, a driving motor 17, a belt pulley 18, a belt 19, a water collection tank 20, a drain pipe 21, a second one-way exhaust valve 22, a first one-way exhaust valve 23, a control valve 24, a pressure relief valve 25, a discharge valve 26, an annular air bag 27 and an annular water stop 28.

Detailed Description

As shown in fig. 1 to 5, an assembled open-cut tunnel joint waterproof grouting device comprises a mounting plate 1, a piston cylinder 4 is arranged on the mounting plate 1, a first piston 8 in the piston cylinder 4 is arranged on the first piston 8, a driving mechanism for driving the first piston 8 to move is arranged at the end part of the piston cylinder 4 in the extending direction of the first piston 8, a material collecting chamber communicated with the first piston is arranged at the end part of the first piston, a grouting pipe 2 is arranged at the end part of the material collecting chamber, a grouting head 3 is arranged at the end part of the grouting pipe 2, an annular air bag 27 is arranged at the outer side of the grouting head 3, materials are selected as rubber, the inner side surface of the annular air bag 27 is fixedly connected to the outer surface of the grouting head 3, a first exhaust hole is arranged at the outer side surface of the end part of the piston cylinder 4 in the retracting direction of the first piston 8, a first exhaust pipe 12 is arranged on the first exhaust hole, a first one-way exhaust valve 23 and a pressure release valve 25 are sequentially arranged in the exhaust direction of the first exhaust pipe 12, one end of the first exhaust pipe 12 is communicated with the first exhaust hole, the other end of the first exhaust pipe is communicated with the annular air bag 27, and the pressure release valve 25 can refer to the exhaust valve on a pressure cooker. The exhaust gas in the piston cylinder may be discharged through the mounting slit, and the rapidly compressed air may be partially discharged and partially injected into the annular air bag 27.

The working principle of the technical scheme is as follows:

when grout is injected between tunnel joints after assembly is completed, the grouting head 3 of the device is firstly placed in a grouting hole reserved at the joint, then a rotating motor is started, the first piston 8 compresses air in the moving process, the compressed air enters the annular air bag 27 through the first exhaust pipe 12, the annular air bag 27 is inflated, corresponding air pressure can be kept in the annular air bag 27 under the action of the first one-way exhaust valve 23 and the pressure release valve 25, meanwhile, the annular air bag 27 is clamped in the grouting hole when being inflated, the grouting head 3 is fixed, grouting can be started, and meanwhile, after grouting is completed, the grouting head 3 can be taken out only by opening the pressure release valve 25 for exhausting.

The driving mechanism comprises a driving motor 17, belt pulleys 18, a belt 19, a rotating shaft, a mounting frame 16, a crankshaft 14, a first connecting rod 15 and a telescopic shaft 7, wherein the mounting frame 16 is symmetrically fixed on the mounting plate 1, the rotating shaft is rotationally connected to the mounting frame 16 which is symmetrically arranged, the upper parts of two sides of the crankshaft 14 are fixed on the rotating shaft, one end of the first connecting rod 15 is rotationally connected to the lower end of the middle part of the crankshaft 14, the other end of the first connecting rod 15 is rotationally connected to one end of the telescopic shaft 7, one end of the telescopic shaft 7 is fixedly connected to the middle part of the first piston 8, the belt pulleys 18 are respectively arranged on one end of the rotating shaft and the telescopic motor, the belt 19 is wound on the two belt pulleys 18, and the driving motor 17 is fixedly connected to the mounting plate 1.

The working principle of the driving mechanism is as follows:

the driving motor 17 drives the rotating shaft to rotate through the belt 19 and the belt pulley 18, the rotating shaft drives the crankshaft 14 to rotate, and the crankshaft 14 rotates to drive the telescopic shaft 7 to do linear telescopic motion, so that the first piston 8 can be driven to do reciprocating motion in the piston cylinder 4.

The outside of telescopic shaft 7 is equipped with hollow shaft 10, hollow shaft 10 cup joints on telescopic shaft 7, be equipped with second piston 9 on the one end of telescopic shaft 7, the middle part of second piston 9 slides and cup joints on telescopic shaft 7, and second piston 9 is located piston cylinder 4, the other end bilateral symmetry of hollow shaft 10 is equipped with second connecting rod 13, the one end of second connecting rod 13 rotates to be connected in the both sides of hollow shaft 10, the other end of second connecting rod 13 all rotates to be connected in the upper portion of bent axle 14, set up the effect of second piston 9 and hollow shaft 10 and lie in, guarantee telescopic shaft 7 reciprocating motion's stationarity, cup joint simultaneously on telescopic shaft 7, can further avoid the probability of broken damage in the telescopic shaft 7 motion.

Meanwhile, the connection positions of the telescopic shaft 7 and the hollow shaft 10 with the crankshaft 14 are different, namely, when the crankshaft 14 rotates, the two are opposite in movement, and when the telescopic shaft 7 moves forwards, the hollow shaft 10 moves backwards, namely, collision interference between the first piston 8 and the second piston 9 is avoided.

A second exhaust hole is arranged between the retraction limit position of the first piston 8 and the extension limit position of the second piston 9, a second exhaust pipe 11 is arranged on the second exhaust hole, a second one-way exhaust valve 22 is arranged on the second exhaust pipe 11, one end of the second exhaust pipe 11 is communicated with the second exhaust hole, the other end of the second exhaust pipe 11 is communicated with the first exhaust pipe 12, and when the first piston 8 and the second piston 9 move, the first piston 8 retracts and the second piston 9 extends, air between the first piston 8 and the second piston 9 is extruded, namely, the air is injected into the first exhaust pipe 12 through the second exhaust pipe 11, so that the air bag can be inflated, and the contact pressure between the air bag and the grouting hole is assisted;

it should be further noted that when the first piston 8 is retracted and air is squeezed between the first piston 8 and the second piston 9 to inflate the inside of the annular air bag 27, when the first piston 8 is extended, the second piston 9 is retracted, that is, air between the ends of the cylinder body is squeezed to inflate the annular air bag 27, that is, no matter whether the first piston 8 is in the process of telescopic grouting or retracting grouting, air is injected into the inside of the annular air bag 27, so that the contact effect between the annular air bag 27 and the grouting hole wall is ensured, and the problem that the grouting head 3 falls off is avoided, but the existence of the pressure release valve 25 does not need to worry that the air bag is continuously pressurized to cause damage.

The mounting plate 1 is provided with the water collecting tank 20, the water outlet of the water collecting tank 20 is provided with the water discharging pipe 21, one end of the water discharging pipe 21 is communicated with the water outlet of the water collecting tank 20, the other end of the water discharging pipe is communicated with the first exhaust pipe 12, the communicating part is positioned between the first one-way exhaust valve and the pressure release valve 25, the water discharging pipe 21 is provided with the control valve 24 for controlling the on-off of the water discharging pipe, the end part of the first exhaust pipe 12 is detachably connected with the annular cavity, after grouting is finished, the first exhaust pipe 12 can be taken down to be connected with the annular air bag 27, then the connection part of the water discharging pipe 21 and the first exhaust pipe 12 forms negative pressure due to the rapid flow of high-pressure gas in the first exhaust pipe 12, water in the water collecting tank 20 can be sucked, the outer side of a grouting hole can be washed, and at this moment, if slurry is required to be discharged into the hopper 5, if slurry is still required, the end part of the grouting head 3 can be placed into the hopper 5, if slurry is not required, the slurry can be completely filled into the hopper 5, the end part of the first exhaust pipe 12 can be placed into the hopper 5, the hopper 5 can be washed, liquid can be washed, and liquid after the flushing is simultaneously is discharged from the grouting pipe 2, and the water discharging pipe 12, and the water pipe can be preferably cleaned, and the water discharging pipe can be prevented from being connected from the next time, and the water pipe when the pipe is preferably used.

The annular water stop strips 28 which are expanded by water are sleeved on the outer side face of the annular air bag 27 in a sliding manner, so that the annular water stop strips are arranged on the annular air bag 27, the annular water stop strips 28 are in contact with the annular water stop strips 28 when the air bag is expanded, firstly, the annular water stop strips 28 are tightly abutted against the inner wall of the grouting holes through extrusion when the air bag is expanded, the sealing effect on the grouting holes is improved, the grouting effect can be improved, meanwhile, the friction force on the inner walls of the grouting holes is increased, the air bag can form a bulge to be in contact with the grouting holes because the air bag can play a role in blocking the air bag, namely, the problem that the air bag slides out of the grouting holes is further solved, meanwhile, when the air bag is fully taken out by grouting liquid, the annular water stop strips 28 can absorb water to expand, and the grouting holes can be plugged (the number of reserved grouting holes is multiple, slurry is generally gradually injected from bottom to top, and can be determined according to practical conditions).

The automatic feeding device is characterized by further comprising a hopper 5 arranged above the material collecting chamber, a material discharging pipe 6 for connecting the hopper 5 and the material collecting chamber is arranged between the hopper 5 and the material collecting chamber, a one-way material discharging valve 26 is arranged on the material discharging pipe 6, and when the first piston 8 is retracted, the negative pressure in the piston cylinder 4 is used for opening the one-way material discharging valve 26 for feeding. It will be appreciated that preferably both the grouting pipe 2 and the first exhaust pipe 12 are flexible hoses. A plurality of universal wheels for moving the mounting plate 1 are arranged below the mounting plate 1. It should be further explained that a pressure instrument or the like should be installed on the grouting pipe, and the remaining parts (exhaust valve or the like) not mentioned can refer to the piston grouting machine in the prior art.

Specifically, this embodiment also discloses a prefabricated assembly structure and a method for an assembled open cut tunnel, where the grouting machine acts on a seam of the prefabricated structure, as shown in fig. 6-8, where the prefabricated structure includes prefabricated structure A, B blocks connected with cast-in-situ inverted arch C blocks through rebates, and prefabricated structure A, B blocks connected with each other in a vault. The embodiment provides a waterproof method for prefabricated components of an assembled open cut tunnel, which comprises the steps of self-waterproof of a lining structure and waterproof of a prefabricated lining joint. In this embodiment, the self-waterproofing of the prefabricated structure is specifically implemented as:

(1) The construction proportion of waterproof concrete, the mixing amount of the additive, the cement dosage, the addition amount of the fly ash, the fine slag and the like for the prefabricated village building are subjected to trial experiment by a test unit meeting qualification requirements, and the optimized proportion is selected to reach the index of design requirements. Prefabricated village building impervious grade > P10. Meanwhile, the chloride ion diffusion coefficient of the prefabricated lining concrete should be detected, wherein the chloride ion diffusion coefficient is less than 3X 10-12 m < 2 >/s, and the chloride ion diffusion coefficient is detected by adopting an RCM method for 56 days.

(2) The prefabricated lining leak detection test meets 6.3.5 relevant regulations in the quality acceptance Specification of underground waterproof engineering (GB 50208-2011). The inspection method is based on the design that the seepage pressure is too 0.8MPa, the constant pressure is introduced for h, and the seepage depth is not more than 50mm. The prefabricated village is not allowed to have macroscopic cracks before assembly, the big pits and the big unfilled corners of the prefabricated village are well repaired by epoxy mortar in the production, transportation and assembly processes, and hand holes and hoisting holes (grouting holes) of the prefabricated village during use are sealed and filled according to joint treatment measures.

(3) The thickness of the protective layer of the outermost layer of the reinforcement on the upstream surface of the outer side of the prefabricated lining meets the requirement of structural design.

(4) The content of CL-in concrete is strictly controlled according to relevant regulations, and the maximum CL-content is less than 0.06%. The total alkali content (Nap 0 equivalent) of various materials in each cubic meter of concrete is not more than 3 Kq.5), low-hydration cement is selected, the water-cement ratio is not more than 0.36, and the requirements on structural professional drawings are met.

(5) The prefabricated lining is manufactured by adopting a high-precision pipe die so as to ensure the assembly precision of the pre-facing lining. The high-frequency vibrating table is adopted to strengthen vibration in the prefabricated lining production, so that the compactness of concrete is ensured, and the anti-permeability grade requirement is met.

(6) The prefabricated lining should meet the requirements of strength and crack resistance during use, and the maximum crack width must not be greater than 0.20mm and must not be penetrated.

Referring to fig. 7 and 8, in the invention, the waterproof of the prefabricated structure is that the self-waterproof of the prefabricated structure is combined with the waterproof of the prefabricated lining joint, and the waterproof of the prefabricated lining joint is implemented as follows:

1. waterproof gasket

(1) The prefabricated lining is arranged on the upstream surface. The back surface is provided with a double-way sealing gasket for water prevention. A composite ethylene propylene diene monomer rubber seal gasket is pasted in a prefabricated lining seal gasket polling groove, and water is blown by being pressed, woven and compacted and expanded. When the opening amount of the joint seam of the prefabricated lining sealing gasket is 2mm, the sealing gasket can be completely pressed into the sealing gasket groove.

(2) In order to ensure the contact width of sealing gaskets at two sides of the joint, the staggered platform quantity of the prefabricated village circular joint is not more than T5mm, and the staggered platform character is not more than 10%. The formation of the elastic sealing gasket is determined through experiments, and the relevant engineering experience of the assembled structure is reported, so that the hydraulic pressure of 0.8MPa can be resisted for a long time when the seam opening amount is 10mm and the staggered seam is 5 mm. At the same time, the compressive stress of the sealing gasket is not more than 4OkN/m when the prefabricated lining is opened Omm.

(3) The special angle position of the sealing gasket is a water leakage position, and when the angle position is required to be extruded and slid, the angle position can be pressed into the groove without being damaged under the condition of brushing lubrication; meanwhile, a layer of butyl rubber putty sheet with the thickness of 1.5mm is adhered to the corner part in place for reinforcing waterproof, and the riding angles of the putty sheet are respectively not smaller than 150mm.

2. Waterproof caulking

The prefabricated material is laid at the beginning and at the end of the construction section 3-4 rings are used as the ring longitudinal joint and the whole ring caulking, and the rest caulking ranges are as follows: arch item A, B joint (including circular joint and longitudinal joint) the caulking joint is filled with polyurethane sealant.

3. Grouting water-proof for prefabricated lining joint mortises

The joints among the assembled structural members are all in a grouting tongue-and-groove connection mode, joint grouting is needed to be carried out between all joints in the circumferential direction and the longitudinal direction after the structure is assembled, and the joint grouting is carried out through reserved pore channels (grouting holes) arranged in the members. The corner of the prefabricated lining joint is required to be plugged by an ethylene propylene diene monomer sponge rubber strip, and the end part of the sponge rubber strip is required to be lapped with an ethylene propylene diene monomer rubber sealing gasket so as to prevent slurry leakage. And all stretching hole parts are plugged by arranging sponge rubber strips with the thickness of 20mm around the holes.

4. Waterproof part of connection part of cast-in-situ section and prefabricated section

(1) The two sides Zhang Lakong of the prefabricated section connected with the cast-in-situ section are blocked by micro-expansion concrete; the screw thread steel is plugged by water expansion-suppressing rubber; the anchor head is sealed by water-swelling rubber. (2) And the casting section connected with the cast-in-situ section and the prefabricated section is required to be made of micro-expansion concrete. And (3) setting water stop glue and a water stop belt on the end face. (4) The transition with the waterproof layer of the cast-in-situ section is done with special attention.

Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (9)

1. The utility model provides an assembled open cut tunnel seam waterproof grouting device, includes the mounting panel, be equipped with the piston cylinder on the mounting panel, be equipped with first piston in the piston cylinder, be equipped with the actuating mechanism that is used for driving its removal on the first piston, its characterized in that: the end of the piston cylinder in the extending direction of the first piston is provided with an aggregate chamber communicated with the piston cylinder, the end of the aggregate chamber is provided with a grouting pipe, the end of the grouting pipe is provided with a grouting head, the outer side of the grouting head is provided with an annular air bag, the inner side surface of the annular air bag is fixedly connected to the outer surface of the grouting head, the outer side surface of the end of the piston cylinder in the retracting direction of the first piston is provided with a first exhaust hole, the first exhaust hole is provided with a first exhaust pipe, the exhaust direction of the first exhaust pipe is sequentially provided with a first one-way exhaust valve and a pressure relief valve, one end of the first exhaust pipe is communicated with the first exhaust hole, and the other end of the first exhaust pipe is communicated with the annular air bag.

2. The water-proof grouting device for the joints of the fabricated open-cut tunnel according to claim 1, wherein: the driving mechanism comprises a driving motor, belt pulleys, a belt, a rotating shaft, a mounting frame, a crankshaft, a first connecting rod and a telescopic shaft, wherein the mounting frame is symmetrically fixed on a mounting plate, the rotating shaft is rotationally connected to the mounting frame which is symmetrically arranged, the upper parts of the two sides of the crankshaft are fixed on the rotating shaft, one end of the first connecting rod is rotationally connected to the lower end of the middle part of the crankshaft, the other end of the first connecting rod is rotationally connected to one end of the telescopic shaft, one end of the telescopic shaft is fixedly connected to the middle part of the first piston, the belt pulleys are respectively arranged on one end of the rotating shaft and the telescopic motor, the belt is wound on the two belt pulleys, and the driving motor is fixedly connected to the mounting plate.

3. The water-proof grouting device for the joints of the fabricated open-cut tunnel according to claim 2, wherein: the telescopic shaft is characterized in that a hollow shaft is arranged on the outer side of the telescopic shaft, the hollow shaft is sleeved on the telescopic shaft, a second piston is arranged at one end of the telescopic shaft, the middle of the second piston is sleeved on the telescopic shaft in a sliding mode, the second piston is located in a piston cylinder, second connecting rods are symmetrically arranged at two sides of the other end of the hollow shaft, one end of each second connecting rod is rotatably connected to two sides of the hollow shaft, and the other end of each second connecting rod is rotatably connected to the upper portion of the crankshaft.

4. A fabricated open-cut tunnel seam waterproof grouting device as claimed in claim 3, wherein: the second exhaust hole is arranged between the retraction limit position of the first piston and the extension limit position of the second piston, a second exhaust pipe is arranged on the second exhaust hole, a second one-way exhaust valve is arranged on the second exhaust pipe, one end of the second exhaust pipe is communicated with the second exhaust hole, and the other end of the second exhaust pipe is communicated with the first exhaust pipe.

5. The water-proof grouting device for the joints of the fabricated open-cut tunnel according to claim 1, wherein: the water collecting device is characterized in that a water collecting tank is arranged on the mounting plate, a water outlet of the water collecting tank is provided with a water drain pipe, one end of the water drain pipe is communicated with the water outlet of the water collecting tank, the other end of the water drain pipe is communicated with the first exhaust pipe, a communicating part is positioned between the first one-way exhaust valve and the pressure relief valve, a control valve for controlling on-off of the water drain pipe is arranged on the water drain pipe, and the end part of the first exhaust pipe is detachably connected with the annular cavity.

6. The water-proof grouting device for the joints of the fabricated open-cut tunnel according to claim 1, wherein: the outer side surface of the annular air bag is sleeved with a plurality of annular water stop strips which expand when meeting water in a sliding manner.

7. The water-proof grouting device for the joints of the fabricated open-cut tunnel according to claim 1, wherein: the material collecting device is characterized by further comprising a hopper arranged above the material collecting chamber, a material discharging pipe for connecting the hopper and the material collecting chamber is arranged between the hopper and the material collecting chamber, and a one-way material discharging valve is arranged on the material discharging pipe.

8. The water-proof grouting device for the joints of the fabricated open-cut tunnel according to claim 1, wherein: the grouting pipe and the first exhaust pipe are flexible hoses.

9. The water-proof grouting device for the joints of the fabricated open-cut tunnel according to claim 1, wherein: the universal wheels for moving the mounting plate are arranged below the mounting plate.