Steel pipe retaining wall jacking device for soft soil tunnel collapse

Abstract

The utility model discloses a steel pipe retaining wall jacking device for soft soil tunnel collapse, which comprises a jacking counter-force frame, one side of the jacking counter-force frame is connected with two outward-extending supports which are symmetrically distributed, the jacking counter-force frame and the outward-extending supports are matched with a steel pipe righting support, and the steel pipe righting support is connected with the jacking counter-force frame. The steel pipe righting support, the pushing reaction frame and the outward-extending support are located on the same central axis, a steel pipe protection wall penetrates through the interior of the pushing reaction frame and is in lap joint with the top of the steel pipe righting support, and a thrust jack is further arranged on the top of the outward-extending support. The pushing counter-force support and the steel pipe righting support form a stable counter-force supporting system, the bottom of the pushing counter-force support is fixed to the ground, the waist of the pushing counter-force support is connected with the thrust jack in a bolted mode, the outwards-extending support of the pushing counter-force support further supports the thrust jack in the vertical direction, firm supporting counter-force is provided for steel pipe retaining wall jacking operation, and the supporting effect is good. The steel pipe righting support and the pushing counter-force support jointly bear the steel pipe protection wall with the steel plug pin, and multi-point vertical supporting is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel safety rescue equipment, in particular to a steel pipe wall protection jacking device for soft soil tunnel collapse. Background Art

[0002] The development of western my country involves a large number of road and bridge infrastructure construction, and tunnels are often built through soft soil mountains such as loess, expansive soil and red clay. Due to factors such as groundwater seepage, insufficient cohesion of soft soil and shallow tunnel excavation, tunnel construction accidents in loess, expansive soil and red clay are frequent. In particular, tunnel collapse accidents are more likely to occur when the initial support and secondary lining construction are not timely and the survey and design are insufficient when encountering conditions such as blasting construction disturbance, sudden mud and water gushing and high ground stress. In the above circumstances, construction teams close to the face often fail to evacuate in time and are trapped behind the collapsed soil. The industry calls this type of collapse a closed-door collapse. Mountain tunnels are generally built in mountainous areas, which are remote and inconvenient for transportation. There are generally no special rescue devices at the construction site. Once an accident occurs, the rescue channel cannot be opened quickly, which may lead to the death of trapped people and cause irreparable losses to people's lives and safety.

[0003] How to use local materials to quickly build rescue equipment, open up rescue channels, and provide stable support measures to prevent rescue workers from disturbing the collapsed soil during excavation and causing secondary collapse when a soft soil tunnel collapses in mountainous areas has become a common problem that needs to be solved in the industry. To this end, the utility model invents a steel pipe wall jacking device for soft soil tunnel collapse, the thrust system of which can utilize jacks, reaction brackets, and steel pipe straightening brackets, and can be welded on site using steel; the steel pipe wall with latches can be made by punching holes in round steel pipes equipped at the tunnel site. The above materials are available at almost all construction sites, and all construction sites are equipped with welders. The utility model can be used to quickly manufacture a simple rescue device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a steel pipe wall jacking device for soft soil tunnel collapse, which can use local materials to quickly build a rescue device, open a rescue channel, and provide stable support measures to prevent rescue workers from disturbing the collapsed soil during the excavation process and causing secondary collapse, thereby solving the problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A steel pipe wall jacking device for soft soil tunnel collapse comprises a jacking reaction frame, one side of the jacking reaction frame is connected to an outrigger support, two outrigger supports are provided and symmetrically distributed, the jacking reaction frame and the outrigger support cooperate with a steel pipe straightening support, the steel pipe straightening support, the jacking reaction frame and the outrigger support are on the same central axis, a steel pipe wall jacking is passed through the interior of the jacking reaction frame, the steel pipe wall jacking is overlapped on the top of the steel pipe straightening support, and a thrust jack is also provided on the top of the outrigger support.

[0007] Preferably, there are four steel tube righting brackets in total, two of which are arranged on the side of the outrigger bracket away from the top thrust reaction frame, one of which is arranged on the side of the top thrust reaction frame away from the outrigger bracket, and one of which is arranged inside the top thrust reaction frame.

[0008] Preferably, the thrust reaction frame includes a first rectangular frame, a second rectangular frame, a side right-angled trapezoidal frame and an X-shaped internal support. The first rectangular frame at the bottom is connected to the first rectangular frame at the top through the second rectangular frames arranged on both sides thereof, and the first rectangular frame, the second rectangular frame and the side right-angled trapezoidal frame are all fixed with X-shaped internal supports.

[0009] Preferably, the bottom ends of the first rectangular frame, the outrigger and the steel pipe righting bracket are all fixed with anchor bolt steel plates, the four corners of the anchor bolt steel plates are provided with screw holes, and the first rectangular frame, the outrigger and the steel pipe righting bracket are fixed to the ground through the anchor bolt steel plates.

[0010] Preferably, the outrigger is a triangular steel frame with diagonal braces, a connecting plate is fixed to the top of each outrigger, one of the side plates of the connecting plate is also fixed to the side right-angle trapezoidal frame, a thrust jack is fixed in the connecting plate, and the output end of the thrust jack is facing the side away from the thrust reaction frame.

[0011] Preferably, two rows of circular through holes are symmetrically opened on both sides of the steel pipe protective wall, and the distance between adjacent circular through holes in each row is equal, wherein a steel pin is horizontally passed through two corresponding circular through holes, and both ends of the steel pin are respectively against the output end of a thrust jack.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. In the utility model, the jacking reaction support and the steel pipe straightening support form a stable reaction support system. On the one hand, the bottom of the jacking reaction support is fixed to the ground, the waist is bolted to the thrust jack, and the outward support further supports the thrust jack in the vertical direction, providing a solid support reaction force for the steel pipe wall guarding operation; on the other hand, the steel pipe straightening support and the jacking reaction support jointly support the steel pipe wall guarding with steel pins to form a multi-point vertical support, so as to avoid the overturning and sliding caused by the forward movement of the center of gravity during the steel pipe wall guarding operation, thereby ensuring the smooth progress of the jacking operation.

[0014] 2. The thrust jack and the steel pipe guard wall with steel pins of the utility model form a jacking power system. On the one hand, the steel pipe guard wall is pushed forward by the thrust jack; on the other hand, since circular through holes with fixed intervals are drilled on the steel pipe guard wall, after the thrust jack reaches the maximum stroke, the steel pin can be moved to the next circular through hole for exerting force, so that the thrust jack can continue to push the steel pipe guard wall forward.

[0015] 3. The utility model can use local materials to build rescue equipment and open rescue channels at the fastest speed, and provide stable support measures to prevent rescue workers from disturbing collapsed soil during excavation and causing secondary collapse, thereby improving the speed, safety and stability of rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the axonometric drawing of the overall structure of the utility model;

[0017] Figure 2 It is a top view of the overall structure of the utility model;

[0018] Figure 3 It is an axonometric view of the push reaction frame and the outrigger of the utility model;

[0019] Figure 4 It is an axonometric view of the outrigger of the utility model;

[0020] Figure 5 This is the axonometric drawing of the steel pipe wall protection of the utility model;

[0021] Figure 6 This is an axonometric view of the steel pipe righting bracket of the utility model.

[0022] In the figure: 1. Thrust reaction frame; 11. First rectangular frame; 12. Second rectangular frame; 13. Side right-angle trapezoidal frame; 14. X-shaped inner support; 2. Outrigger; 3. Steel pipe straightening bracket; 4. Steel pipe wall guard; 41. Circular through hole; 42. Steel latch; 5. Thrust jack; 51. Connecting plate; 6. Anchor bolt steel plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In order to solve the problem that soft soil tunnel collapse in mountainous areas cannot be rescued in time and the safety and stability of rescue equipment are not high in the existing technology, the following technical solution is given, please refer to Figure 1-6 ;

[0025] A steel pipe wall jacking device for soft soil tunnel collapse comprises a jacking reaction frame 1, one side of the jacking reaction frame 1 is connected to an outrigger 2, two outriggers 2 are provided and symmetrically distributed, the jacking reaction frame 1 and the outrigger 2 cooperate with a steel pipe straightening support 3, the steel pipe straightening support 3, the jacking reaction frame 1 and the outrigger 2 are on the same central axis, a steel pipe wall 4 runs through the interior of the jacking reaction frame 1, the steel pipe wall 4 is overlapped on the top of the steel pipe straightening support 3, and a thrust jack 5 is also provided on the top of the outrigger 2.

[0026] Specifically, the push reaction frame 1 is welded from a DN80 round steel pipe as a whole, and has a height of 2 meters; the thrust jack 5 adopts a 100-ton heavy-duty vertical hydraulic jack, and has a lifting height of 180 mm.

[0027] There are four steel pipe righting supports 3 in total, two of which are arranged on the side of the outrigger 2 away from the top thrust reaction frame 1, one of which is arranged on the side of the top thrust reaction frame 1 away from the outrigger 2, and one of which is arranged inside the top thrust reaction frame 1.

[0028] Specifically, the steel pipe straightening bracket 3 is welded into a 0.5m×1.5m gate-shaped steel frame. The steel pipe straightening bracket 3 can support the steel pipe guard wall 4, provide vertical support for the jacking operation of the steel pipe guard wall 4, and ensure that the steel pipe guard wall 4 will not overturn due to the forward shift of the center of gravity, thereby achieving the function of supporting the steel pipe guard wall 4 and straightening its forward direction; the steel pipe straightening bracket 3 and the jacking reaction frame 1 together form a multi-point vertical support structure, and the frame spacing can be adjusted according to the actual situation at the rescue site to meet the supporting requirements of steel pipe guard walls 4 with different rescue lengths.

[0029] The thrust reaction frame 1 includes a first rectangular frame 11, a second rectangular frame 12, a side right-angled trapezoidal frame 13 and an X-shaped inner support 14. The first rectangular frame 11 at the bottom is connected to the first rectangular frame 11 at the top through the second rectangular frames 12 arranged on both sides thereof, and the first rectangular frame 11, the second rectangular frame 12 and the side right-angled trapezoidal frame 13 are all fixed with X-shaped inner supports 14.

[0030] Specifically, the first rectangular frame 11 is a base with a size of 2m×1m, the second rectangular frame 12 has a size of 1.5m×1m, and the side right-angled trapezoidal frame 13 has a size of an upper base of 1.5m, a lower base of 2m, and a height of 2m.

[0031] The bottom ends of the first rectangular frame 11, the outrigger 2 and the steel pipe righting bracket 3 are all fixed with anchor bolt steel plates 6, and screw holes are provided on the four corners of the anchor bolt steel plates 6. The first rectangular frame 11, the outrigger 2 and the steel pipe righting bracket 3 are fixed to the ground through the anchor bolt steel plates 6.

[0032] Specifically, six anchor bolt steel plates 6 are welded to each node at the bottom of the first rectangular frame 11, two anchor bolt steel plates 6 are welded to the bottom of each outrigger 2, two of which are shared by the first rectangular frame 11 and the outrigger 2, and an anchor bolt steel plate 6 is welded to each of the two fulcrums at the bottom of the steel pipe straightening bracket 3. The size of the anchor bolt steel plate 6 is 300mm×200mm×20mm, and the anchor bolts pass through the anchor bolt steel plates 6 and are fixed to the ground.

[0033] The outrigger 2 is a triangular steel frame with diagonal braces. A connecting plate 51 is fixed to the top of each outrigger 2. One of the side plates of the connecting plate 51 is also fixed to the side right-angle trapezoidal frame 13. A thrust jack 5 is fixed inside the connecting plate 51. The output end of the thrust jack 5 faces the side away from the thrust reaction frame 1.

[0034] Specifically, the size of the outrigger 2 is 1m×0.8m, and the outrigger 2 further supports the thrust jack 5, so that the thrust jack 5 has more fixing devices, ensuring that the thrust jack 5 will not become unstable and fall under a large thrust; the connecting plate 51 is welded from three steel plates, each of which has a size of 200mm×200mm×20mm. Screw holes are opened on the steel plate, and the thrust jack 5 is fixed to the connecting plate 51 by high-strength bolts, thereby being connected to the thrust reaction frame 1 and the outrigger 2 as a whole, thereby achieving the purpose of transmitting the support reaction force of the thrust jack 5 to the first rectangular frame 11, the second rectangular frame 12, the side right-angle trapezoidal frame 13 and the X-shaped inner support 14, and finally transmitting the force to the foundation.

[0035] Two rows of circular through holes 41 are symmetrically provided on both sides of the steel pipe protective wall 4. The distances between adjacent circular through holes 41 in each row are equal. A steel pin 42 is passed through two corresponding circular through holes 41 horizontally. Both ends of the steel pin 42 are respectively against the output end of a thrust jack 5.

[0036] Specifically, the steel pipe protective wall 4 is made of a round steel pipe with a diameter of 1 m, and two circular through holes 41 are opened on both sides of the round steel pipe at intervals of 150 mm, and the aperture of the circular through holes 41 is 5 cm.

[0037] Specifically, in a preferred implementation, the collapsed soil in the tunnel is loess, expansive soil or red clay, and the length of the collapsed section is within 10 meters. According to the actual situation on site, it is estimated in advance where initial supporting steel bars and hard objects may exist in the collapsed body, and these parts are avoided. The jacking route of the steel pipe guard wall 4 is reasonably planned to reduce the jacking resistance of the steel pipe guard wall 4.

[0038] Specifically, the utility model provides a method for using a steel pipe wall jacking device for soft soil tunnel collapse, which specifically includes the following steps:

[0039] Step 1: Quickly organize a tunnel collapse rescue team, assess the approximate length of the collapse, whether there are hard obstacles inside the collapsed soil and their approximate locations, avoid hard obstacles, and determine the installation location of the utility model;

[0040] Step 2: According to the design dimensions given by the utility model, use the on-site steel to quickly weld and manufacture the top push reaction frame 1, the thrust jack 5, the steel pipe wall 4 with the steel pin 42 and the steel pipe straightening bracket 3, and use the anchor bolts to quickly assemble and fix the utility model at the predetermined erection position;

[0041] Step 3: Use the thrust jack 5 to push the steel pipe guard wall 4 forward. After reaching the fixed spacing of the circular through holes 41, move the steel pin 42 to the next circular through hole 41 and continue to push forward.

[0042] Step 4: During the jacking process of the steel pipe protective wall 4, rescue personnel are arranged to enter the interior of the steel pipe protective wall 4 to dig out the collapsed soil every 2 meters to form a rescue channel, and pay attention to whether the steel pipe protective wall 4 is dented to ensure the safety of the rescue process.

[0043] Step 5: When the steel pipe protective wall 4 reaches the limit length but still fails to penetrate the landslide body, the steel pipe protective wall 4 is quickly extended by electric welding, and the jacking operation is continued until the landslide soil is penetrated and a rescue channel is opened.

[0044] Step 6: Use rescue channels to rescue trapped persons in time.

[0045] After experience is formed in the above process, rescue can be carried out using hydraulic jacks with larger stroke and tonnage. The structure of the jacking reaction support can also be made of square steel or channel steel based on experience.

[0046] Working principle: Drill circular through holes 41 with equal intervals on the steel pipe protective wall 4, insert steel pins 42 into the circular through holes 41, and use the thrust jack 5 to push the steel pins 42 forward. Each time the steel pins 42 are pushed a fixed distance, they can be pulled out and inserted into the circular through holes 41 of the next level, so as to achieve the purpose of moving forward with a fixed step length and realize the goal of the steel pipe protective wall 4 penetrating the collapsed soil. After the steel pipe protective wall 4 penetrates the collapsed soil, it provides a protective wall support for the rescue personnel, avoiding the secondary collapse of the collapsed soil during the excavation process due to gravity, burying the rescue personnel, and creating conditions for safe rescue. After the steel pipe protective wall 4 penetrates the collapsed soil, the rescue personnel can quickly dig through the soft soil in the steel pipe protective wall 4 to form a rescue channel, and the trapped personnel can be transferred to a safe area through the rescue channel.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel pipe wall jacking device for soft soil tunnel collapse, comprising a jacking reaction frame (1), characterized in that: One side of the thrust reaction frame (1) is connected to an outrigger (2), and the outrigger (2) is provided with two and symmetrically distributed ones. The thrust reaction frame (1) and the outrigger (2) cooperate with a steel pipe straightening frame (3), and the steel pipe straightening frame (3) and the thrust reaction frame (1) and the outrigger (2) are located on the same central axis. A steel pipe protective wall (4) runs through the interior of the thrust reaction frame (1), and the steel pipe protective wall (4) is overlapped on the top of the steel pipe straightening frame (3). A thrust jack (5) is also provided on the top of the outrigger (2).

2. The steel pipe wall jacking device for soft soil tunnel collapse according to claim 1 is characterized in that: There are four steel pipe straightening brackets (3) in total, two of which are arranged on the side of the outrigger bracket (2) away from the top thrust reaction frame (1), one of which is arranged on the side of the top thrust reaction frame (1) away from the outrigger bracket (2), and one of which is arranged inside the top thrust reaction frame (1).

3. The steel pipe wall jacking device for soft soil tunnel collapse according to claim 1 is characterized in that: The thrust reaction frame (1) comprises a first rectangular frame (11), a second rectangular frame (12), a side right-angled trapezoidal frame (13) and an X-shaped inner support (14); the first rectangular frame (11) at the bottom is connected to the first rectangular frame (11) at the top via the second rectangular frames (12) arranged on both sides thereof; the first rectangular frame (11), the second rectangular frame (12) and the side right-angled trapezoidal frame (13) are all fixed with an X-shaped inner support (14) inside.

4. The steel pipe wall jacking device for soft soil tunnel collapse according to claim 3 is characterized in that: The bottom ends of the first rectangular frame (11), the outrigger (2) and the steel pipe straightening bracket (3) are all fixed with anchor bolt steel plates (6), the four corners of the anchor bolt steel plates (6) are provided with screw holes, and the first rectangular frame (11), the outrigger (2) and the steel pipe straightening bracket (3) are fixed to the ground through the anchor bolt steel plates (6).

5. The steel pipe wall jacking device for soft soil tunnel collapse according to claim 3 is characterized in that: The outrigger (2) is a triangular steel frame with diagonal braces. A connecting plate (51) is fixed to the top of each outrigger (2). One of the side plates of the connecting plate (51) is also fixed to the side right-angle trapezoidal frame (13). A thrust jack (5) is fixed inside the connecting plate (51). The output end of the thrust jack (5) faces a side away from the thrust reaction frame (1).

6. The steel pipe wall jacking device for soft soil tunnel collapse according to claim 1, characterized in that: Two rows of circular through holes (41) are symmetrically formed on both sides of the steel pipe protective wall (4), and the distances between adjacent circular through holes (41) in each row are equal. A steel latch (42) is passed through two corresponding circular through holes (41) in a transverse direction, and the two ends of the steel latch (42) are respectively abutted against the output end of a thrust jack (5).

Images