A grouting device for the construction of a railway tunnel in complex geology

Abstract

The present invention relates to the field of tunnel concrete pouring, and specifically to a grouting device for the construction of a railway tunnel in complex geology, which includes a grouting cylinder, the two ends of which are respectively connected to a grouting head and a slurry delivery pipe. A first airbag is fixed on the outer side of the grouting cylinder, and the first airbag is communicated with a second airbag inside the grouting cylinder through an air delivery pipe. The second airbag is connected to a pressure ring inside the grouting cylinder. When grouting operations are carried out, the slurry drives the pressure ring to move towards the side close to the grouting head, and the pressure ring squeezes the second airbag, causing the first airbag to expand and tightly adhere to the inner wall of the grouting hole, sealing the injection hole. Thus, it avoids the problem that currently, since the opening specification of the actually opened grouting hole can only be inserted by the gun head, construction workers are unable to observe the degree of grouting, and often over-grouting occurs, resulting in the slurry splashing out from the grouting hole.

Description

Technical Field

[0001] The present invention relates to the field of tunnel concrete pouring, and specifically to a grouting device for the construction of a railway tunnel in complex geology. Background Art

[0002] In recent years, with the vigorous development of economic construction, the people's demand for infrastructure, especially rail transit facilities, has been increasing continuously. When carrying out construction operations, construction units often face complex geological conditions.

[0003] During the construction of a tunnel, in order to improve the physical and mechanical properties of the foundation and other supporting surfaces, a grouting process is often used to inject certain curable slurries into the cracks or pores of the rock and soil foundation, and processes such as replacement, filling, and extrusion of the foundation and other supporting surfaces are carried out.

[0004] Currently, when grouting, the gun head of the grouting device needs to be inserted into a pre-opened grouting hole. Since the opening size of the actual grouting hole can only allow the gun head to be inserted, construction workers cannot observe the grouting degree, and the situation where the grout overflows and splashes out of the grouting hole often occurs. Summary of the Invention

[0005] The purpose of the present invention is to provide a grouting device for the construction of a railway tunnel in complex geology, so as to solve the problem that currently, since the opening size of the actually opened grouting hole can only allow the gun head to be inserted, construction workers cannot observe the grouting degree, and the situation where the grout overflows and splashes out of the grouting hole often occurs.

[0006] To achieve the above purpose, the present invention provides a grouting device for the construction of a railway tunnel in complex geology, including a grouting cylinder, the internal passage of which is used for the grouting slurry to pass through. One end of the grouting cylinder is connected to a slurry delivery pipe, and the other end is equipped with a grouting head;

[0007] A first airbag is fixed on the outer side of the barrel body of the grouting cylinder near the grouting head. The first airbag is used to abut against the inner wall of the grouting hole. The first airbag is communicated with a second airbag inside the grouting cylinder through an air delivery pipe. The second airbag is connected to a pressure ring inside the grouting cylinder. The pressure ring is installed on the internal passage through a connecting member. The pressure ring is elastically connected to the grouting cylinder through a first elastic member. When grouting operations are carried out, the slurry drives the pressure ring to move towards the side close to the grouting head, and the pressure ring squeezes the second airbag, causing the first airbag to expand;

[0008] The grouting head is slidably connected to one end of the grouting cylinder and is elastically connected to the grouting cylinder through a second elastic member. A connecting rod is installed at one end of the grouting head close to the grouting cylinder. One end of the connecting rod extends into the gas transmission pipe, and a gas guiding member is installed at the end. When the slurry pushes the grouting head to lock into the grouting cylinder, the gas guiding member communicates with the exhaust hole opened on the gas transmission pipe for exhausting the air in the first airbag.

[0009] As a further scheme of the present invention, multiple groups of guiding columns are installed on the pressure ring. The guiding columns are slidably installed in the guiding holes opened on the grouting cylinder. The first elastic member is installed in the guiding holes for elastically connecting the grouting cylinder and the pressure ring.

[0010] As a further scheme of the present invention, a set of mounting rings are respectively installed on both end faces of the second airbag. Among them, the mounting ring close to the pressure ring is rotatably connected to the pressure ring, and the other set of mounting rings is fixedly connected in the grouting cylinder.

[0011] As a further scheme of the present invention, the connecting member is a connecting ring. Multiple groups of guiding vanes are fixed inside the connecting ring. The connecting ring is slidably connected to the inner wall of the inner channel. Multiple groups of fixing columns are arranged on the side surface of the connecting ring. The fixing columns are slidably connected in the arc-shaped guiding grooves opened on the inner wall of the inner channel.

[0012] As a further scheme of the present invention, the second airbag is communicated with the environment through a supplementary air pipe. A one-way valve is installed on the supplementary air pipe. The one-way valve is used for unidirectionally introducing the gas in the environment into the second airbag.

[0013] As a further scheme of the present invention, a set of limiting rings are coaxially installed on the end surface of the grouting head. The limiting rings are slidably connected in the connecting grooves opened in the grouting cylinder. The limiting rings are elastically connected to the bottom of the connecting grooves through second elastic members.

[0014] As a further scheme of the present invention, the gas guiding member is a gas guiding pipe. The outer wall of the gas guiding pipe is closely attached to the inner wall of the gas transmission pipe. Through holes for communicating with the exhaust holes are opened on the gas guiding pipe. Positioning blocks for limiting the sliding stroke of the gas guiding pipe are fixed on the inner wall of the gas transmission pipe.

[0015] As a further scheme of the present invention, the exhaust hole is communicated with the exhaust pipe on the grouting cylinder. A warning member is installed in the exhaust pipe. The warning member is used for warning when there is gas passing through the exhaust pipe.

[0016] Compared with the prior art, by respectively arranging a first airbag and a second airbag outside and inside the grouting cylinder, when the slurry is conveyed from the inside of the grouting cylinder, the second airbag is extruded through the conduction of the cooperating components, and the gas in the second airbag is conveyed into the first airbag, so that the first airbag abuts against the inner wall of the grouting hole, sealing the grouting hole, avoiding the problem that currently, since the opening specification of the actually opened grouting hole can only be inserted by the gun head, the construction personnel cannot observe the grouting degree, and often the grouting is excessive and the slurry splashes out from the grouting hole. At the same time, by using a specially designed grouting head and air guiding parts, the personnel can be reminded to complete the grouting operation, improving the grouting efficiency. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a grouting device for railway tunnel construction in complex geology provided by the present invention.

[0018] Figure 2 It is an internal schematic diagram of the grouting cylinder provided by the present invention.

[0019] Figure 3 It is a structural diagram of the second airbag provided by the present invention.

[0020] Figure 4 It is a top view of the pressure ring provided by the present invention.

[0021] Figure 5 Provided by the present invention Figure 2 An enlarged schematic view of part A in

[0022] Figure 6 Provided by the present invention Figure 2 An enlarged schematic view of part B in

[0023] Figure 7 It is a sectional view of the air guide pipe provided by the present invention.

[0024] In the drawings: 1. Grouting cylinder; 2. Delivery pipe; 3. Grouting head; 301. Limit ring; 4. First airbag; 5. Second airbag; 501. Installation ring; 6. Second elastic member; 7. Connecting rod; 8. Air delivery pipe; 801. Positioning block; 9. Pressure ring; 10. Connecting ring; 101. Fixed column; 102. Guide post; 11. Air guide pipe; 111. Through hole; 12. Exhaust pipe; 1201. Warning member; 13. Air supply pipe; 1301. Check valve; 14. First elastic member; 15. Guide vane. Detailed Description of the Embodiment

[0025] The technical solutions of the present invention will be further described in detail below in conjunction with the specific embodiments.

[0026] As Figure 1 and Figure 2As shown in the figure, in the embodiment of the present invention, a grouting device for constructing a railway tunnel in complex geology includes a grouting cylinder 1, the internal passage of which is used for the grouting slurry to pass through. One end of the grouting cylinder 1 is connected to a slurry delivery pipe 2, and a grouting head 3 is installed at the other end. A first airbag 4 is fixed to the outer side of the barrel body of the grouting cylinder 1 near the grouting head 3. The first airbag 4 is used to abut against the inner wall of the grouting hole. The first airbag 4 is communicated with a second airbag 5 inside the grouting cylinder 1 through an air delivery pipe 8. The second airbag 5 is connected to a pressure ring 9 inside the grouting cylinder 1. The pressure ring 9 is installed on the internal passage through a connecting member. The pressure ring 9 is elastically connected to the grouting cylinder 1 through a first elastic member 14. When grouting operation is carried out, the slurry drives the pressure ring 9 to move towards the side close to the grouting head 3, and the pressure ring 9 squeezes the second airbag 5, causing the first airbag 4 to expand. The grouting head 3 is slidably connected to one end of the grouting cylinder 1 and is elastically connected to the grouting cylinder 1 through a second elastic member 6. A connecting rod 7 is installed at one end of the grouting head 3 close to the grouting cylinder 1. One end of the connecting rod 7 extends into the air delivery pipe 8, and a gas guiding member is installed at the end. When the slurry pushes the grouting head 3 to lock into the grouting cylinder 1, the gas guiding member is communicated with an exhaust hole opened on the air delivery pipe 8 for discharging the air inside the first airbag 4.

[0027] In the present invention, when grouting operation is carried out, the grouting head 3 and the first airbag 4 are inserted into the grouting hole. The slurry is transported to the grouting cylinder 1 through the delivery pipe 2 and is finally injected into the foundation through the grouting head 3. When the slurry is transported, it drives the pressure ring 9 to move, squeezing the second airbag 5. The gas in the second airbag 5 is transported to the first airbag 4 through the air delivery pipe 8, causing the first airbag 4 to expand and tightly adhere to the inner wall of the grouting hole. The first airbag 4 can not only seal the grouting hole but also prevent the grouting head 3 from shaking during the grouting process, improving the stability and safety of grouting.

[0028] At the same time, when the grouting is completed, the grouting slurry flows back into the grouting hole, squeezing the grouting head 3, driving the grouting head 3 to retract into the grouting cylinder 1, correspondingly driving the gas guiding member to move, so that the gas guiding member is communicated with the exhaust hole opened on the air delivery pipe 8, and the gas inside the first airbag 4 is discharged from the grouting cylinder 1 through the air delivery pipe 8 and the exhaust hole. The first airbag 4 is separated from the state of tightly adhering to the inner wall of the grouting hole. At this time, the grouting cylinder 1 can be easily pulled out of the grouting hole.

[0029] As Figure 2 and Figure 5 shown in the figure, in the embodiment of the present invention, a plurality of guiding columns 102 are installed on the pressure ring 9. The guiding columns 102 are slidably installed in guiding holes opened on the grouting cylinder 1. The first elastic member 14 is installed in the guiding holes for elastically connecting the grouting cylinder 1 and the pressure ring 9. In this embodiment, the pressure ring 9 is arranged on the upper side of the second airbag 5, that is, on the side of the second airbag 5 away from the grouting head 3.

[0030] Furthermore, as Figure 3 shown, a set of mounting rings 501 are respectively installed on both end faces of the second airbag 5. Among them, the mounting ring 501 close to the pressure ring 9 is rotatably connected to the pressure ring 9, and the other set of mounting rings 501 are fixedly connected in the grouting cylinder 1. Specifically, both the first airbag 4 and the second airbag 5 are selected as annular structures. It should be noted that in the present invention, a partition plate is provided at the inner circle of the second airbag 5 to block the slurry from the second airbag 5, avoiding the slurry from sticking to the second airbag 5 and preventing damage to the second airbag 5.

[0031] Still further, as Figure 4 well as Figure 6 shown, the connecting member is a connecting ring 10. A plurality of guide vanes 15 are fixedly arranged inside the connecting ring 10. The plurality of guide vanes 15 form a fan blade structure. The connecting ring 10 is slidably connected to the inner wall of the internal passage. A plurality of fixing columns 101 are arranged on the side surface of the connecting ring 10. The fixing columns 101 are slidably connected in the arc-shaped guide grooves opened on the inner wall of the internal passage. In the present invention, when the slurry is conveyed through the internal passage in the grouting cylinder 1, when the slurry contacts the plurality of guide vanes 15, the plurality of guide vanes 15 are driven to rotate, thereby driving the connecting ring 10 to rotate. At the same time, the fixing columns 101 slide along the arc-shaped guide grooves, so that during the rotation of the connecting ring 10, it also moves along the axial direction of the grouting cylinder 1 to squeeze the second airbag 5. The gas in the second airbag 5 is conveyed into the first airbag 4 through the air delivery pipe 8, so that the first airbag 4 expands and abuts against the inner wall of the grouting hole to seal the grouting hole. It should be noted that when the first airbag 4 finishes expanding, at this time, the second airbag 5 is in a state where it cannot be compressed, and correspondingly, at this time, the connecting ring 10 and the guide vanes 15 are both in a stable state, and the slurry is conveyed through the gaps between the guide vanes 15;

[0032] The second airbag 5 is communicated with the environment through a supplementary air pipe 13. A one-way valve 1301 is installed on the supplementary air pipe 13. The one-way valve 1301 is used to allow the gas in the environment to enter the second airbag 5 unidirectionally. By setting the one-way valve 1301, the gas in the external environment can enter the second airbag 5 for air supplement, and the gas in the second airbag 5 cannot be discharged through the supplementary air pipe 13 and can only enter the first airbag 4 through the air delivery pipe 8.

[0033] As Figure 2 shown, in the embodiment of the present invention, a set of limit rings 301 are coaxially installed on the end face of the grouting head 3. The limit rings 301 are slidably connected in the connection grooves opened in the grouting cylinder 1. The limit rings 301 are elastically connected to the bottom of the connection grooves through second elastic members 6. When the injection molding of the injection pipe is completed, the injected slurry fills the injection hole, and at the same time, the slurry squeezes the grouting head 3 to retract into the grouting cylinder 1, correspondingly driving the air guiding member to move;

[0034] Among them, the supplementary Figure 6 and Figure 7 As shown, the air guiding member is an air guiding pipe 11. The outer wall of the air guiding pipe 11 is in close contact with the inner wall of the air delivery pipe 8. A through hole 111 communicating with the exhaust hole is formed on the air guiding pipe 11. A positioning block 801 for limiting the sliding stroke of the air guiding pipe 11 is fixed on the inner wall of the air delivery pipe 8. When the grouting head 3 retracts, it drives the connecting rod 7 and the air guiding pipe 11 mounted thereon to move. The moving position of the air guiding pipe 11 is positioned by the positioning block 801. At this time, the through hole 111 on the air guiding pipe 11 is aligned and communicated with the exhaust hole on the air delivery pipe 8. The gas in the first airbag 4 is extruded by the pressure of the slurry. At this time, the pressure between the first airbag 4 and the inner wall of the grouting hole is reduced, facilitating the operator to take out the grouting cylinder 1 from the liquid injection hole;

[0035] Note that during the extraction process, it is necessary to synchronously close one end of the grouting cylinder 1 connected to the slurry delivery pipe 2 to stop grouting. The exhaust hole is communicated with the exhaust pipe 12 on the grouting cylinder. A warning member 1201 is installed in the exhaust pipe 12. The warning member 1201 is used to give a warning when there is gas passing through the exhaust pipe 12. The warning member 1201 selected in the present invention is an air plastic whistle. When there is gas passing through the exhaust pipe 12, the air plastic whistle can make a sound, prompting the operator that the grouting is completed, stopping grouting and pulling out the grouting cylinder 1 from the grouting hole. When the grouting cylinder 1 is pulled out, the grouting head 3 is elastically supported by the second elastic member 6, driving the grouting head 3 to extend out of the grouting cylinder 1 for resetting;

[0036] Among them, in the present invention, the first elastic member 14 and the second spring member are successively selected as the first spring group and the second spring group. When no grouting operation is carried out, the connecting ring 10 is driven to move and reset by the elastic force of the first spring group. And when the grouting head 3 is separated from the slurry, the grouting head 3 is driven to extend out of the grouting cylinder 1 by the elastic force of the second spring group. Of course, in actual design, other components with elastic telescopic ability can also be selected, such as spring telescopic rods and other components.

[0037] To sum up, by respectively arranging a first airbag 4 and a second airbag 5 outside and inside the grouting cylinder 1, when the slurry is conveyed inside the grouting cylinder 1, the second airbag 5 is extruded through the conduction of the components, and the gas in the second airbag 5 is conveyed into the first airbag 4, so that the first airbag 4 abuts against the inner wall of the grouting hole to seal the grouting hole, avoiding the problem that at present, since the opening specification of the actually opened grouting hole can only be inserted by the gun head, the construction personnel cannot observe the grouting degree, and often the grouting is excessive and the slurry splashes out from the grouting hole. At the same time, using a specially designed grouting head 3 and air guiding member can remind the personnel to complete the grouting operation and improve the grouting efficiency.

[0038] The above describes in detail the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A grouting device for complex geological railway tunnel construction, characterized in that, it includes a grouting cylinder, the internal channel of which is used for the grouting slurry to pass through. One end of the grouting cylinder is connected to the slurry delivery pipe, and a grouting head is installed at the other end; a first airbag is fixed on the outer side of the cylinder body of the grouting cylinder near the grouting head side. The first airbag is used to abut against the inner wall of the grouting hole. The first airbag is communicated with a second airbag inside the grouting cylinder through an air delivery pipe. The second airbag is connected to a pressure ring inside the grouting cylinder. The pressure ring is installed on the internal channel through a connecting piece. The pressure ring is elastically connected to the grouting cylinder through a first elastic member. When grouting operation is carried out, the slurry drives the pressure ring to move towards the side close to the grouting head, and the pressure ring squeezes the second airbag, causing the first airbag to expand; a group of mounting rings are installed on both end faces of the second airbag respectively. Among them, the mounting ring close to the pressure ring side is rotatably connected to the pressure ring, and the other group of mounting rings are fixedly connected inside the grouting cylinder. The second airbag is communicated with the environment through a supplementary air pipe, and a one-way valve is installed on the supplementary air pipe. The one-way valve is used to allow the gas in the environment to enter the second airbag unidirectionally; the grouting head is slidably connected to one end of the grouting cylinder and is elastically connected to the grouting cylinder through a second elastic member. A connecting rod is installed at one end of the grouting head close to the grouting cylinder. One end of the connecting rod extends into the air delivery pipe, and a gas guiding member is installed at the end. When the slurry pushes the grouting head to lock into the grouting cylinder, the gas guiding member is communicated with the exhaust hole opened on the air delivery pipe, and is used for exhausting the air in the first airbag.

2. The grouting device for complex geological railway tunnel construction according to claim 1, characterized in that, a plurality of guiding columns are installed on the pressure ring. The guiding columns are slidably installed in the guiding holes opened on the grouting cylinder. The first elastic member is installed in the guiding holes and is used for elastically connecting the grouting cylinder and the pressure ring.

3. The grouting device for complex geological railway tunnel construction according to claim 1, characterized in that, the connecting piece is a connecting ring. A plurality of guiding vanes are fixed inside the connecting ring. The connecting ring is slidably connected to the inner wall of the internal channel. A plurality of fixing columns are arranged on the side surface of the connecting ring. The fixing columns are slidably connected in the arc-shaped guiding grooves opened on the inner wall of the internal channel.

4. The grouting device for complex geological railway tunnel construction according to claim 1, characterized in that, a group of limiting rings are coaxially installed on the end surface of the grouting head. The limiting rings are slidably connected in the connecting grooves opened inside the grouting cylinder. The limiting rings are elastically connected to the bottom of the connecting grooves through second elastic members.

5. The grouting device for complex geological railway tunnel construction according to claim 1, characterized in that, the gas guiding member is a gas guiding pipe. The outer wall of the gas guiding pipe is closely attached to the inner wall of the air delivery pipe. A through hole communicating with the exhaust hole is opened on the gas guiding pipe. A positioning block for limiting the sliding stroke of the gas guiding pipe is fixed on the inner wall of the air delivery pipe.

6. The grouting device for complex geological railway tunnel construction according to any one of claims 1-5, characterized in that, The exhaust hole is communicated with an exhaust pipe on the grouting cylinder, and a warning member is installed in the exhaust pipe. The warning member is used to give a warning when gas passes through the exhaust pipe.

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