Crushed surrounding rock water stop grouting structure capable of applying stress

Abstract

The utility model discloses a broken surrounding rock water stop grouting structure capable of applying stress. The broken surrounding rock water stop grouting structure comprises an auxiliary sleeve, a grouting pipe, a tray, a fastening nut, a first film bag, a second film bag and the like. Wherein the grouting pipe is sleeved with the auxiliary sleeve, a gap is formed between the auxiliary sleeve and the grouting pipe, the lower end of the grouting pipe is located below a lower port of the auxiliary sleeve, and liquid outlet holes are formed in the pipe wall of the grouting pipe. The tray covers the upper end of the auxiliary sleeve, and the upper end of the grouting pipe penetrates through the tray and then is in threaded connection with the fastening nut. The first film bag is arranged on the outer side wall of the auxiliary sleeve in a sleeving mode and fixedly connected with the auxiliary sleeve, the second film bag is arranged on the outer side wall of the grouting pipe in a sleeving mode and located below the auxiliary sleeve, and the lower end of the second film bag is communicated with the second film bag. The water stop grouting structure has the functions of remark grouting and anchor rods, so that the two targets of reinforcing and water leakage blocking are completed at the same time, the field workload can be effectively reduced, and the engineering construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel reinforcing engineering technical field especially, relate to a broken surrounding rock water stop grouting structure of stress application. BACKGROUND

[0002] ‌When excavating a tunnel in a water-rich broken surrounding rock section, underground water often flows into the tunnel due to the existence of rock fissures. In traditional drilling and blasting construction, the surrounding rock of the excavated section is disturbed by the blasting operation of the next excavation cycle, and the water stop structure formed by the last cycle grouting is affected, causing some arch tops to leak. In addition, the rock mass at the arch top position is prone to local shedding and falling, which has an adverse effect on the next stage of construction. Grouting, as the main means to deal with tunnel leakage during construction, is widely used in the field of tunnel engineering. It can achieve water leakage by filling the surrounding rock with grout that can solidify in the subsequent process. In addition, grouting in broken rock-soil can improve the integrity of the tunnel surrounding rock, thereby improving the stability of the surrounding rock and ensuring the safety of tunnel excavation.

[0003] Traditional grouting methods usually focus on water stop or reinforcement as the main goal, and the grouting steel pipes currently used in the field of engineering cannot apply stress. Therefore, the common reinforcement method for ground deformation or instability is anchor support, which can fully mobilize the bearing capacity of the rock-soil body. However, for water-rich and broken surrounding rock, simple anchor support cannot achieve the effect of plugging water leakage, making it difficult to achieve both reinforcement and water leakage plugging for this type of surrounding rock. UTILITY MODEL CONTENT

[0004] To solve the above problems, the utility model provides a broken surrounding rock water stop grouting structure that can apply stress, which combines the functions of grouting and anchor, thereby achieving both reinforcement and water leakage plugging, effectively reducing the amount of field work and speeding up the efficiency of engineering construction. Specifically, the utility model technical scheme is as follows.

[0005] The application discloses a stress-applicable broken surrounding rock water-stopping grouting structure, which comprises an auxiliary sleeve, a grouting pipe, a tray, a fastening nut, a first membrane bag, a second membrane bag, a first feeding pipe and a second feeding pipe.

[0006] Further, the upper end side wall of the grouting pipe is provided with external threads, which are screwed with the fastening nut.

[0007] Further, the outer diameter of the auxiliary sleeve is 2-4 times of the outer diameter of the grouting pipe.

[0008] Further, the fastening nut is provided with a gasket between the fastening nut and the tray.

[0009] Further, the first membrane bag is sleeved on the outer side wall of the auxiliary sleeve, and both ends of the first membrane bag are fixedly sealed on the outer side wall of the auxiliary sleeve by binding, so that a liquid storage cavity is formed between the auxiliary sleeve and the first membrane bag.

[0010] Further, the second membrane bag is sleeved on the outer side wall of the grouting pipe, and both ends of the second membrane bag are fixedly sealed on the outer side wall of the grouting pipe by binding, so that a liquid storage cavity is formed between the grouting pipe and the second membrane bag.

[0011] Further, the fastening bolt is screwed in the screw hole in the side wall of the fastening nut and abuts against the outer wall of the grouting pipe, so that the fastening is increased.

[0012] Further, the tray is provided with a pressing rod fixed on the top surface of the groove, and the lower end of the pressing rod abuts against the upper surface of the flange plate.

[0013] Compared with the prior art, the utility model at least has the following beneficial effects: the water stop grouting structure can first inject grout into surrounding rock to reinforce through the cooperation of the auxiliary sleeve, the grouting pipe, the first membrane bag, the second membrane bag and other components, thereby simultaneously achieving the target of reinforcement and water leakage blocking, can effectively reduce the field operation amount, and can speed up the engineering construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of this utility model form a part of the utility model and serve to provide further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions serve to explain the utility model, and do not constitute an improper limitation on the utility model.

[0015] Figure 1 The following is a structure diagram of the broken surrounding rock water stop grouting structure that can apply stress in the following examples.

[0016] Figure 2 The following is a structure diagram of the auxiliary sleeve in the following examples.

[0017] The marks in the drawing represent: 1-auxiliary sleeve, 2-grouting pipe, 3-tray, 4-fastening nut, 5-first membrane bag, 6-second membrane bag, 7-first material conveying pipe, 8-second material conveying pipe, 9-fastening bolt, 10-pressing rod, 101-flange, 102-opening, 201-clearance, 202-liquid outlet hole. DETAILED DESCRIPTION

[0018] It should be pointed out that the following detailed description is exemplary and aims to provide further explanation of the utility model. Unless otherwise specified, all the technical and scientific terms used in the utility model have the same meaning as that generally understood by the ordinary skilled in the art to which the utility model belongs.

[0019] For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the utility model, they only represent the same direction as the upper, lower, left and right directions of the drawing itself, and do not limit the structure, but only serve to facilitate the description of the utility model and simplify the description, and therefore cannot be understood as limiting the utility model. The technical scheme of the utility model is further explained in combination with specific examples.

[0020] Reference Figure 1 and Figure 2The application discloses a stress-applied broken surrounding rock water-stopping grouting structure, which comprises an auxiliary sleeve, a grouting pipe, a tray, a fastening nut, a first membrane bag, a second membrane bag, a first feeding pipe and a second feeding pipe. Specifically, the auxiliary sleeve and the grouting pipe are vertically arranged, the auxiliary sleeve is sleeved outside the grouting pipe and a gap is formed between the auxiliary sleeve and the grouting pipe. The lower end of the grouting pipe extends to below the lower end of the auxiliary sleeve after extending out of the lower port of the auxiliary sleeve, and the pipe wall of the part of the grouting pipe extending to below the lower end of the auxiliary sleeve is provided with a liquid outlet hole. The upper end of the grouting pipe extends to above the upper end of the auxiliary sleeve after extending out of the upper port of the auxiliary sleeve. The outer diameter of the auxiliary sleeve is 2-4 times, such as 2 times, 3 times, 3.5 times or 4 times, of the outer diameter of the grouting pipe, and other suitable sizes can also be selected according to requirements.

[0021] The upper port of the auxiliary sleeve is provided with a flange plate, and the flange plate is provided with an opening. The tray is recessed and the upper port of the auxiliary sleeve and the flange plate are covered in the tray. The upper end of the grouting pipe is provided with external threads, and the upper end of the grouting pipe is movably connected with the fastening nut through the through hole in the center of the upper port of the auxiliary sleeve and the tray.

[0022] The first membrane bag is a cylinder sleeved on the outer side wall of the auxiliary sleeve and provided with two open ends, and the two ports of the first membrane bag are fixed on the outer side wall of the auxiliary sleeve by binding and sealing, so that a liquid storage cavity is formed between the auxiliary sleeve and the first membrane bag. The second membrane bag is sleeved on the outer side wall of the grouting pipe and located below the auxiliary sleeve. Specifically, the second membrane bag is a cylinder sleeved on the outer side wall of the grouting pipe and provided with two open ends, and the two ports of the second membrane bag are fixed on the outer side wall of the grouting pipe by binding and sealing, so that a liquid storage cavity is formed between the grouting pipe and the second membrane bag. The liquid outlet hole is located in the lower part of the second membrane bag.

[0023] The first membrane bag and the second membrane bag are respectively communicated with the first feeding pipe and the second feeding pipe, wherein the upper end of the first feeding pipe is located in the tray through the opening in the flange plate, and the upper end of the second feeding pipe is located in the tray through the gap between the auxiliary sleeve and the grouting pipe.

[0024] The process of surrounding rock reinforcement by using the stress-applied broken surrounding rock water-stopping grouting structure comprises the following steps.

[0025] (1) The drill rod is used to drill a hole at the part to be reinforced, and the hole diameter and depth are matched with the auxiliary casing 1, and then the auxiliary casing 1 and the first membrane bag 5 are lowered into the hole. Then the first feeding pipe 7 is used to inject grout (such as quick-setting double-liquid grout formed by mixing cement and water glass) into the first membrane bag 5, so that the first membrane bag 5 is expanded to fix the auxiliary casing 1 in the hole, so that the auxiliary casing 1 constructs a stable space, which is beneficial to prevent the collapse of the broken surrounding rock in the part where the auxiliary casing 1 is located during the subsequent drilling process.

[0026] (2) Then the drill rod is lowered into the bottom of the auxiliary casing 1, and the hole is drilled, and the hole diameter and depth are matched with the grouting pipe 2. Then the grouting pipe 2 and the second membrane bag 6 are lowered into the hole, and the second membrane bag 6 is located at the port of the hole. Then the second feeding pipe 8 is used to inject grout into the second membrane bag 6, so that the second membrane bag 6 is expanded to fix the grouting pipe 2 in the hole. At the same time, due to the plugging effect of the second membrane bag 6 on the upper port of the hole, the grout injected into the hole by the grouting pipe 2 has greater pressure, which can be more quickly and concentratedly distributed and diffused to the surrounding rock around the hole, improving the grouting efficiency and obtaining a larger grout distribution range. These grouts can better reinforce the surrounding rock and seal the water leakage after solidification, thereby simultaneously achieving the two goals of reinforcement and water sealing, reducing the amount of on-site work, and speeding up the efficiency of engineering construction.

[0027] (3) After completion, the tray 3 is covered on the port of the grouting pipe 2, and the outer end of the grouting pipe 2 passes through the through hole in the center of the tray 3 and is connected with the fastening nut 4. By continuously tightening the fastening nut 4, the tray 3 is pressed and fixed on the surrounding rock, and the purpose of applying tensile stress to the grouting pipe 2 is achieved, thereby further reinforcing the loose soil on the surface of the surrounding rock.

[0028] In another embodiment, referring to Figure 1 , the water sealing and grouting structure of the above embodiment further comprises a fastening bolt 9. The side wall of the fastening nut 4 has a screw hole, the fastening bolt 9 is threadedly connected in the screw hole, and one end of the fastening bolt 9 abuts against the outer wall of the grouting pipe 2, so that the grouting pipe 2 and the fastening nut 4 are more firmly connected together.

[0029] In another embodiment, the water sealing and grouting structure of the above embodiment further comprises a gasket arranged between the fastening nut 4 and the tray 3.

[0030] In another embodiment, referring to Figure 1The tray 3 of the water stop grouting structure of the above embodiment also has a pressing rod 10. Specifically, the pressing rod 10 is located in the groove of the tray 3 and fixed on the top surface thereof, and at least two pressing rods 10 are uniformly distributed around the grouting pipe 2. When the tray 3 is extruded and fixed on the surrounding rock by the fastening nut 4, the lower end of the pressing rod 10 abuts against the upper surface of the flange plate 101, so that the extrusion force formed by the tray 3 on the surrounding rock and the extrusion force formed by the flange plate 101 on the surrounding rock are alternately realized to achieve a better reinforcement effect.

[0031] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stress-applicable broken surrounding rock water-stopping grouting structure, characterized in that, It comprises: a grouting pipe; an auxiliary sleeve, which is sleeved outside the grouting pipe arranged vertically and has a gap between them, the lower end of the grouting pipe is below the lower port of the auxiliary sleeve, and the pipe wall of this part of the grouting pipe has a liquid outlet hole; a tray, the upper port of the auxiliary sleeve has a flange plate, which has an opening on its disc surface; the recess-shaped tray covers the flange plate therein, a fastening nut, the upper end of the grouting pipe is screwed with the fastening nut after passing through the tray; a first membrane bag, which is sleeved on the outer sidewall of the auxiliary sleeve and communicates with it; a second membrane bag, which is sleeved on the outer sidewall of the grouting pipe and is below the auxiliary sleeve; the liquid outlet hole is located in the lower part of the second membrane bag; a first feed pipe, which communicates with the first membrane bag, and the upper end of the first feed pipe is located in the tray after passing through the opening on the flange plate; a second feed pipe, which communicates with the second membrane bag, and the upper end of the second feed pipe is located in the tray after passing through the gap between the auxiliary sleeve and the grouting pipe.

2. The stress-applicable broken surrounding rock water-stopping grouting structure according to claim 1, characterized in that, The upper end sidewall of the grouting pipe has external threads, which are screwed with the fastening nut.

3. The stress-applicable broken surrounding rock water-stopping grouting structure according to claim 1, characterized in that, There is a gasket between the fastening nut and the tray.

4. The stress-applicable broken surrounding rock water-stopping grouting structure according to claim 1, characterized in that, The outer diameter of the auxiliary sleeve is 2-4 times the outer diameter of the grouting pipe.

5. The stress-applicable broken surrounding rock water-stopping grouting structure according to claim 1, characterized in that, The first membrane bag is sleeved on the outer sidewall of the auxiliary sleeve, and both ports of the first membrane bag are sealed and fixed on the outer sidewall of the auxiliary sleeve by binding, so as to form a liquid storage cavity between the auxiliary sleeve and the first membrane bag.

6. The stress-applicable broken surrounding rock water-stopping grouting structure according to claim 1, characterized in that, The second membrane bag is sleeved on the outer sidewall of the grouting pipe, and both ports of the second membrane bag are sealed and fixed on the outer sidewall of the grouting pipe by binding, so as to form a liquid storage cavity between the grouting pipe and the second membrane bag.

7. The stress-applicable broken surrounding rock waterstop grouting structure according to any one of claims 1-6, characterized in that, It also comprises a fastening bolt, which is screwed in the screw hole on the sidewall of the fastening nut and abuts against the outer wall of the grouting pipe.

8. The stress-applicable broken surrounding rock waterstop grouting structure according to any one of claims 1-6, characterized in that, The recess of the tray has a pressing rod fixed on its top surface, and the lower end of the pressing rod abuts against the upper surface of the flange plate.

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