Construction device for underground engineering reverse well

Abstract

The invention belongs to the technical field of reverse well construction, and particularly relates to a construction device for an underground engineering reverse well, which comprises templates, a connecting assembly and a main rod, a plurality of templates are encircled into a circle to be placed in the reverse well, the space between the outer wall of each template and the inner wall of the reverse well is used for grouting, the connecting assembly is mounted on the main rod, and the main rod is connected with the template. The connecting assembly is used for fixing the formwork and comprises a plurality of first connecting structures, each first connecting structure comprises a first rod fixedly mounted on the main rod, a round rod is slidably mounted on each first rod, a second rod is rotatably mounted on each round rod, and the outer side of each second rod is fixedly connected with the formwork; the formwork is fixed by arranging the telescopic connecting structure, the formwork is suitable for sectional type excavation during construction of the reverse construction well, water and soil loss in the construction process is conveniently prevented, the formwork in the contracted state is in a side placement state by arranging the round rod, and the probability that the formwork collides with the reverse construction well to be damaged in the hoisting process of the formwork is reduced.

Description

Technical Field

[0001] The invention belongs to the field of reverse well construction, in particular to a construction device for reverse wells in underground engineering. Background Art

[0002] Reverse well construction is a special construction method, mainly used for the construction of underground buildings. Its construction sequence is opposite to the conventional forward construction method. The underground structure is constructed from top to bottom. The reverse well structure includes multiple sections of retaining walls and bottom plates. When pouring the retaining walls of the reverse well, construction equipment is needed to support the formwork.

[0003] A patent application with publication number CN218880865U discloses an integrated formwork for a reverse shaft, including a support frame, and also including: a unloading platform arranged on the support frame; a forming module arranged on the support frame; the support frame and the unloading platform are hoisted to the interior of the reverse shaft by a hoisting assembly, and then concrete can be poured to the periphery of the forming module through the unloading platform, that is, the protective wall of the reverse shaft is cast.

[0004] In underground engineering construction, in order to ensure construction safety and prevent soil erosion, a variety of support structures are usually used. However, traditional support structures are often difficult to meet construction requirements in complex environments, especially in preventing soil erosion. For this reason, segmented excavation can be used, that is, retaining wall construction is carried out immediately after each excavation to prevent soil erosion. The device size of the above scheme cannot be changed. It can only be hoisted into the reverse well after the reverse well is dug to realize the casting of the retaining wall of the reverse well. It cannot adapt to the segmented excavation method.

[0005] To this end, the present invention provides a construction device for reverse well construction in underground engineering. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the construction device for reverse wells in underground engineering described in the present invention includes a template, a connecting assembly and a main rod. A number of the templates are arranged in a circle and placed in the reverse well. The space between the outer wall of the template and the inner wall of the reverse well is used for grouting. The main rod is provided with a No. 1 lifting ring for lifting. The connecting assembly is installed on the main rod. The connecting assembly is used to fix the template. The connecting assembly includes a number of No. 1 connecting structures. The No. 1 connecting structures are distributed in a ring on the main rod. The No. 1 connecting structure includes a No. 1 rod fixedly installed on the main rod. A round rod is slidably installed on the No. 1 rod. A No. 2 rod is rotatably installed on the round rod. The outer side of the No. 2 rod is fixedly connected to the template.

[0008] Preferably, the connecting assembly also includes a plurality of No. 2 connecting structures, the No. 2 connecting structures are consistent with the No. 1 connecting structure, the No. 2 connecting structures and the No. 1 connecting structure are interspersed and distributed on the main rod, and the No. 2 connecting structures and the No. 1 connecting structure have different heights.

[0009] Preferably, the No. 1 connecting structure also includes: a No. 2 lifting ring, the No. 2 lifting ring is fixedly mounted on the upper surface of the No. 1 rod and at one end away from the main rod; a No. 3 lifting ring, the No. 3 lifting ring is fixedly mounted on the side wall of the No. 2 rod; a No. 1 rope, one end of the No. 1 rope is connected to one end of the No. 2 rod close to the main rod; a No. 2 rope, one end of the No. 2 rope is connected to the No. 3 lifting ring, and the No. 2 rope passes through the No. 2 lifting ring; a sliding rod, the sliding rod is slidably mounted inside the main rod, the other ends of the No. 1 rope and the No. 2 rope are both connected to the sliding rod, and when the sliding rod slides upward, the No. 2 rod slides toward the inside of the No. 1 rod under the pull of the No. 1 rope, and vice versa, the No. 2 rod slides toward the outside of the No. 1 rod under the pull of the No. 2 rope; a hydraulic rod, the hydraulic rod is fixedly mounted inside the main rod, and the hydraulic rod is used to control the up and down sliding of the sliding rod.

[0010] Preferably, the side wall of the No. 2 rod contains a plurality of the No. 3 rings, and the No. 2 rope is connected to the No. 3 rings.

[0011] Preferably, a plurality of rollers are rotatably mounted on the main rod, and the No. 2 rope and the No. 1 rope are both in contact with the rollers on the main rod.

[0012] Preferably, the device also includes a grouting assembly, which includes: an inclined plate, which is installed on the outer circumference of the main rod; a circular ring, which is rotatably installed on the outer circumference of the inclined plate, and the circular ring is provided with a circular hole for fixing the grouting device pipe; a material guide plate, which is slidably installed on the circular ring, and the material guide plate adopts a telescopic structure, and the other end of the material guide plate is installed on the upper surface of the No. 2 rod.

[0013] Preferably, the inclined plate is slidably connected to the main rod up and down, a telescopic rod is rotatably mounted on the lower surface of the guide plate, and the guide plate is connected to the No. 2 rod through the telescopic rod.

[0014] Preferably, the grouting assembly also includes a No. 3 rope installed on the inclined plate and a No. 4 lifting ring installed on one side of the guide plate, one end of the No. 3 rope is fixedly installed on the movable end of the telescopic rod, and the No. 3 rope passes through the No. 4 lifting ring.

[0015] Preferably, the main rod contains two groups of connecting components, and the two groups of connecting components are detachably connected.

[0016] Preferably, the No. 1 connection structure also includes a gear fixedly mounted on the round rod, and a rack plate for driving the gear to rotate is fixedly mounted on the No. 1 rod.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The construction device for reverse wells in underground engineering described in the present invention fixes the template by setting a retractable connection structure, is suitable for segmented excavation during reverse well construction, and is convenient for preventing soil and water loss during the construction process. By setting round rods, the template in the contracted state is placed on its side, which reduces the probability of the template being damaged by collision with the reverse well during hoisting. In conjunction with the No. 2 rope, it can not only control the movement of the No. 2 rod, but also provide an upward pulling force to the No. 2 rod after the No. 2 rod is moved out of the No. 1 rod, thereby avoiding the problem of the No. 2 rod breaking due to insufficient load-bearing after being pulled out of the No. 1 rod.

[0019] 2. The construction device for reverse wells in underground engineering described in the present invention can realize pouring concrete in the space between the outer periphery of the template and the inner wall of the reverse well by setting a grouting assembly. In conjunction with the No. 3 rope and the telescopic rod, after the grouting is completed, the grouting assembly can be removed from the connecting assembly first, which can not only reduce the stress on the main rod, delay the loss of the device, and extend the service life of the device, but also can timely clean the concrete on the grouting assembly, avoiding the problem of solidification of concrete on the grouting assembly and inconvenience in cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the template of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the No. 2 rod of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the No. 1 rope of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the sliding rod of the present invention;

[0026] Figure 6 It is a structural schematic diagram of a No. 1 connection structure and a No. 2 connection structure of the present invention;

[0027] Figure 7 is a cutaway view of the main rod of the present invention;

[0028] Figure 8It is a structural schematic diagram of a round rod of the present invention;

[0029] Fig. 9 It is a diagram of the contraction state of the template, the first connecting component and the second connecting component of the present invention;

[0030] Fig.10 It is a structural schematic diagram of the telescopic rod of the present invention;

[0031] Fig.11 It is a schematic diagram of the structure of the inclined plate and the circular ring of the present invention;

[0032] In the figure: 1. formwork; 2. connecting assembly; 21. connecting structure No. 1; 211. rod No. 1; 212. round rod; 213. rod No. 2; 214. lifting ring No. 2; 215. lifting ring No. 3; 216. rope No. 1; 217. rope No. 2; 218. sliding rod; 219. hydraulic rod; 2110. gear; 2111. rack plate; 22. connecting structure No. 2; 3. main rod; 4. lifting ring No. 1; 5. roller; 6. grouting assembly; 61. inclined plate; 62. round ring; 63. guide plate; 64. telescopic rod; 65. rope No. 3; 66. lifting ring No. 4. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1-Figure 11 As shown, a construction device for reverse wells in underground engineering according to an embodiment of the present invention comprises a template 1, a connecting assembly 2 and a main rod 3. A plurality of templates 1 are arranged in a circle and placed in the reverse well. The space between the outer wall of the template 1 and the inner wall of the reverse well is used for grouting. A No. 1 lifting ring 4 for lifting is provided on the main rod 3. The connecting assembly 2 is installed on the main rod 3. The connecting assembly 2 is used to fix the template 1. The connecting assembly 2 comprises a plurality of No. 1 connecting structures 21. The No. 1 connecting structures 21 are arranged in a circular array on the main rod 3. The No. 1 connecting structure 21 comprises a No. 1 rod 211 fixedly mounted on the main rod 3. A round rod 212 is slidably mounted on the No. 1 rod 211. A No. 2 rod 213 is rotatably mounted on the round rod 212. The outer side of the No. 2 rod 213 is fixedly connected to the template 1.

[0036] Specifically, in order to ensure construction safety and prevent soil erosion during underground engineering construction, a variety of support structures are usually used. However, traditional support structures are often difficult to meet construction requirements in complex environments, especially in preventing soil erosion. For this reason, segmented excavation can be used, that is, the retaining wall construction is carried out immediately after each segment is excavated to prevent soil erosion. The existing device can only be hoisted into the reverse well after the reverse well is dug to realize the pouring of the retaining wall of the reverse well, so it can only adapt to the traditional excavation method; the template 1, the No. 1 connection structure 21 and the No. 2 connection structure 22 in the initial state are as follows: Fig. 9 As shown, during reverse well construction, a small hole is first drilled from the ground surface to the inside of the soil using a drilling device, and then a larger drill bit is replaced or a telescopic drilling device is used. After the small hole is drilled, the drill bit is extended to dig a large hole from bottom to top, and segmented excavation is adopted. After a large hole is dug, the No. 1 lifting ring 4 on the main rod 3 can be connected to the lifting device, and the lifting device puts the template 1, the main rod 3 and the connecting assembly 2 into the small hole until the template 1, the main rod 3 and the connecting assembly 2 are located at the large hole, and then the round rod 212 is controlled to rotate, and the rotation of the round rod 212 drives the No. 2 rod 213 to rotate synchronously, and the rotation of the No. 2 rod 213 drives the template 1 to rotate, and at the same time the round rod 212 is controlled to move in a direction away from the main rod 3, driving the No. 2 rod 213 to move synchronously in a direction away from the main rod 3, and the No. 2 rod 213 moves The template 1 is driven to move synchronously until the template 1 forms a circle, and then concrete is poured into the space between the outer periphery of the template 1 and the inner wall of the reverse well. After the concrete solidifies, the second rod 213 and the template 1 are controlled to move to the initial state, and then the template 1, the main rod 3 and the connecting assembly 2 are moved out of the reverse well by the lifting device, that is, the action of pouring the protective wall of the reverse well is realized, and the reverse well is excavated again by the drilling device, and so on, until the construction of the reverse well is completed; the template 1 is fixed by setting a retractable connecting structure, which is suitable for segmented excavation during the construction of the reverse well, which is convenient for preventing soil erosion during the construction process, and the round rod 212 is set to make the template 1 in the contracted state in a side-by-side state, reducing the probability of collision and damage between the template 1 and the reverse well during the lifting process.

[0037] like Figure 2 As shown, the connection assembly 2 also includes a plurality of No. 2 connection structures 22, which are consistent with the No. 1 connection structure 21, and the No. 2 connection structure 22 and the No. 1 connection structure 21 are interspersed and distributed on the main rod 3, and the No. 2 connection structure 22 and the No. 1 connection structure 21 have different heights.

[0038] Specifically, by setting the No. 1 connecting structure 21 and the No. 2 connecting structure 22, the entire circular template 1 can be divided into multiple groups of small-arc templates 1, reducing the downward pulling force of a single template 1 on the No. 2 rod 213 and reducing the probability of the No. 2 rod 213 and the No. 1 rod 211 breaking.

[0039] like Figure 2 , Figure 4 , Figure 5 As shown, the No. 1 connection structure 21 also includes: a No. 2 lifting ring 214, which is fixedly mounted on the upper surface of the No. 1 rod 211 and at one end away from the main rod 3; a No. 3 lifting ring 215, which is fixedly mounted on the side wall of the No. 2 rod 213; a No. 1 rope 216, one end of which is connected to the end of the No. 2 rod 213 close to the main rod 3; a No. 2 rope 217, one end of which is connected to the No. 3 lifting ring 215, and the No. 2 rope 217 passes through the No. 2 lifting ring 214; a sliding rod 218 The sliding rod 218 is slidably installed inside the main rod 3, and the other ends of the No. 1 rope 216 and the No. 2 rope 217 are connected to the sliding rod 218. When the sliding rod 218 slides upward, the No. 2 rod 213 slides toward the inside of the No. 1 rod 211 under the pull of the No. 1 rope 216, and vice versa, the No. 2 rod 213 slides toward the outside of the No. 1 rod 211 under the pull of the No. 2 rope 217; hydraulic rod 219, the hydraulic rod 219 is fixedly installed inside the main rod 3, and the hydraulic rod 219 is used to control the up and down sliding of the sliding rod 218.

[0040] Specifically, the ring 62 rotates relative to the inclined plate 61 to adapt to the movement of the guide plate 63 driven by the rotation of the No. 2 rod 213. The guide plate 63 is telescopic and can slide relative to the inclined plate 61 to adapt to the sliding of the No. 2 rod 213 relative to the No. 1 rod 211. When the template 1 is hoisted to the large hole of the reverse well, the hydraulic rod 219 of the No. 1 connecting structure 21 is controlled to extend downward, so that the sliding rod 218 moves downward, so that one end of the No. 2 rope 217 on the sliding rod 218 is pulled downward, and the part of the No. 2 rope 217 that is not inside the main rod 3 moves upward into the inside of the main rod 3, and the No. 2 rope 217 17 moves so that the second rod 213 moves radially away from the main rod 3. While the second rod 213 moves, the round rod 212 is controlled to rotate. The rotation of the round rod 212 causes the second rod 213 to rotate synchronously. After the first connecting structure 21 moves a certain distance, the hydraulic rod 219 of the second connecting structure 22 is controlled to extend downward. Similarly, the second rod 213 moves radially away from the main rod 3 and rotates until the second rod 213 of the first connecting structure 21 and the template 1 on the second rod 213 of the second connecting structure 22 form a circle, that is, the extension action of the connecting component 2 is realized.

[0041] like Figure 5 As shown, the side wall of the No. 2 rod 213 includes a plurality of No. 3 hanging rings 215 , and the No. 2 rope 217 is connected to the No. 3 hanging rings 215 .

[0042] Specifically, after the No. 2 rope 217 is straightened, the No. 2 rope 217 exerts an upward pulling force on the No. 2 rod 213 , thereby improving the problem that the No. 2 rod 213 is insufficiently loaded and breaks after pulling out the No. 1 rod 211 .

[0043] like Figure 4 As shown, a plurality of rollers 5 are rotatably mounted on the main rod 3 , and the No. 2 rope 217 and the No. 1 rope 216 are both in contact with the rollers 5 on the main rod 3 .

[0044] Specifically, since the No. 2 rope 217 and the No. 1 rope 216 are subject to back-and-forth friction with the main rod 3 during the pulling process, the rotating drum 5 is provided to improve the problem of the No. 2 rope 217 and the No. 1 rope 216 breaking due to friction after working for a long time, thereby extending the service life of the device.

[0045] like Figure 6 , Fig.10 , Fig.11 As shown, the device also includes a grouting assembly 6, which includes: an inclined plate 61, which is installed on the outer periphery of the main rod 3; a ring 62, which is rotatably installed on the outer periphery of the inclined plate 61, and a circular hole for fixing the grouting device pipe is provided on the ring 62; a guide plate 63, which is slidably installed on the ring 62, and the guide plate 63 adopts a telescopic structure, and the other end of the guide plate 63 is installed on the upper surface of the second rod 213.

[0046] Specifically, before hoisting the formwork 1 into the reverse working well, fix the pipe of the grouting device on the circular hole of the ring 62, and then use the hoisting device to hoist the connecting component 2, the grouting component 6 and the formwork 1 to the large hole of the reverse working well, and then control the connecting component 2 to extend so that the formwork 1 forms a circle, and then transport the concrete to the inclined plate 61 through the pipe of the grouting component. The concrete on the inclined plate 61 flows from the guide plate 63 to the space between the inner wall of the reverse working well and the outer periphery of the formwork 1, so as to realize the grouting action. After the concrete solidifies, it becomes a wall protection. After the concrete solidifies, control the connecting component 2 to shrink, and then move the formwork 1, the connecting component 2 and the grouting component 6 out of the reverse working well through the hoisting device.

[0047] like Figure 3 , Fig.10 , Fig.11 As shown, the inclined plate 61 is slidably connected to the main rod 3 up and down, and a telescopic rod 64 is rotatably installed on the lower surface of the guide plate 63, and the guide plate 63 is connected to the second rod 213 through the telescopic rod 64.

[0048] like Fig.10 , 11 As shown, the grouting assembly 6 also includes a No. 3 rope 65 installed on the inclined plate 61 and a No. 4 lifting ring 66 installed on one side of the guide plate 63. One end of the No. 3 rope 65 is fixedly installed on the movable end of the telescopic rod 64, and the No. 3 rope 65 passes through the No. 4 lifting ring 66.

[0049] Specifically, before work, the third rope 65 is connected to another lifting device, and the movable end of the telescopic rod 64 is inserted into the No. 2 rod 213 to realize the connection between the grouting assembly 6 and the connecting assembly 2. After the concrete is poured, the lifting device is controlled to pull the third rope 65 upward. The third rope 65 is pulled and moves upward. The third rope 65 moves upward, and the movable end of the telescopic rod 64 is first removed from the No. 2 rod 213, so that the grouting assembly 6 and the connecting assembly 2 can be separated. The third rope 65 continues to shrink, so the guide plate 63 shrinks and slides inwardly to realize the shrinkage of the guide plate 63. When the guide plate 63 shrinks and contacts, the lifting device moves the grouting assembly 6 out of the interior of the reverse working well through the No. 3 rope 65; after the grouting is completed, the grouting assembly 6 is first removed from the connecting assembly 2, which can not only reduce the force on the main rod 3, delay the loss of the device, and extend the service life of the device, but also can timely clean the concrete on the grouting assembly 6, avoiding the problem that the concrete on the grouting assembly 6 solidifies and is inconvenient to clean.

[0050] like Figure 1 , Figure 4 As shown, the main rod 3 contains two groups of connecting components 2, and the two groups of connecting components 2 are detachably connected.

[0051] Specifically, by providing two sets of connection components 2, the weight of the template 1 can be distributed on the two No. 2 rods 213. Compared with a single No. 2 rod 213, the force is reduced, and the probability of the No. 2 rod 213 breaking is reduced.

[0052] like Figure 8 As shown, the No. 1 connection structure 21 also includes a gear 2110 fixedly mounted on the round rod 212 , and a rack plate 2111 for driving the gear 2110 to rotate is fixedly mounted on the No. 1 rod 211 .

[0053] Specifically, when the second rod 213 moves in a direction away from the main rod 3, it drives the round rod 212 to move synchronously. The movement of the round rod 212 drives the gear 2110 to move. During the movement of the gear 2110, it contacts the rack plate 2111. Since the rack plate 2111 is stationary, the gear 2110 rotates. The rotation of the gear 2110 drives the round rod 212 and the second rod 213 to rotate.

[0054] Working principle: before hoisting the template 1 into the reverse well, fix the pipe of the grouting device on the circular hole of the ring 62, connect the No. 3 rope 65 to a hoisting device, insert the movable end of the telescopic rod 64 into the No. 2 rod 213 to realize the connection between the grouting assembly 6 and the connecting assembly 2, and connect it with another hoisting device through the No. 1 hoisting ring 4 on the main rod 3. The hoisting device puts the template 1, the main rod 3, the grouting assembly 6 and the connecting assembly 2 into the small hole until the template 1, the main rod 3 and the connecting assembly 2 are located at the large hole, and controls the hydraulic rod 219 of the No. 1 connecting structure 21 to extend downward, so that the sliding rod 218 moves downward, so that one end of the No. 2 rope 217 on the sliding rod 218 is pulled downward, and the No. 2 rope 217 is not inside the main rod 3. The second rod 213 moves upward into the interior of the main rod 3, and the movement of the second rope 217 causes the second rod 213 to move radially away from the main rod 3. While the second rod 213 moves, the round rod 212 is controlled to rotate, and the rotation of the round rod 212 causes the second rod 213 to rotate synchronously. After the first connecting structure 21 moves a certain distance, the hydraulic rod 219 of the second connecting structure 22 is controlled to extend downward. Similarly, the second rod 213 moves radially away from the main rod 3 and rotates until the second rod 213 of the first connecting structure 21 and the template 1 on the second rod 213 of the second connecting structure 22 form a circle, that is, the extension action of the connecting assembly 2 is realized, and then the concrete is transported to the inclined plate 61 through the pipeline of the grouting assembly, and the concrete on the inclined plate 61 is removed from the guide plate 63 After the concrete is solidified, the hydraulic rod 219 of the No. 1 connecting structure 21 is controlled to retract upward, so that the sliding rod 219 of the No. 1 connecting structure 21 is moved upward. 218 moves upward, so that one end of the No. 1 rope 216 on the sliding rod 218 is pulled upward, and the part of the No. 1 rope 216 that is not inside the main rod 3 moves toward the direction close to the main rod 3 and enters the inside of the main rod 3. The movement of the No. 1 rope 216 causes the No. 2 rod 213 to move radially toward the direction close to the main rod 3. While the No. 2 rod 213 moves, the round rod 212 is controlled to rotate. The rotation of the round rod 212 causes the No. 2 rod 213 to rotate synchronously. After the No. 1 connecting structure 21 moves a certain distance, the hydraulic rod 219 of the No. 2 connecting structure 22 is controlled to retract upward. Similarly, the No. 2 rod 213 moves radially toward the direction close to the main rod 3 and rotates until the No. 2 rod 213 of the No. 1 connecting structure 21 and the template 1 on the No. 2 rod 213 of the No. 2 connecting structure 22 are retracted to the initial state.That is, the action of contraction of the connection assembly 2 is realized, and then the template 1, the main rod 3 and the connection assembly 2 are moved out of the reverse well by the lifting device, and the reverse well is excavated again by the drilling device, and so on, until the construction of the reverse well is completed.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A construction device for reverse wells in underground engineering, comprising a plurality of templates (1), a connecting assembly (2) and a main rod (3), wherein the plurality of templates (1) are arranged in a circle and placed in the reverse well, and the space between the outer wall of the template (1) and the inner wall of the reverse well is used for grouting, and the main rod (3) is provided with a No. 1 lifting ring (4) for lifting, and the connecting assembly (2) is installed on the main rod (3), and the connecting assembly (2) is used to fix the template (1), characterized in that: The connection assembly (2) comprises a plurality of No. 1 connection structures (21), the No. 1 connection structures (21) are arranged in a circular array on the main rod (3), the No. 1 connection structure (21) comprises a No. 1 rod (211) fixedly mounted on the main rod (3), a round rod (212) is slidably mounted on the No. 1 rod (211), a No. 2 rod (213) is rotatably mounted on the round rod (212), and the outer side of the No. 2 rod (213) is fixedly connected to the template (1).

2. A construction device for reverse well construction in underground engineering according to claim 1, characterized in that: The connecting assembly (2) further comprises a plurality of No. 2 connecting structures (22), wherein the No. 2 connecting structures (22) are consistent with the No. 1 connecting structure (21), the No. 2 connecting structures (22) and the No. 1 connecting structure (21) are interspersed and distributed on the main rod (3), and the No. 2 connecting structures (22) and the No. 1 connecting structure (21) have different heights.

3. A construction device for reverse well construction in underground engineering according to claim 2, characterized in that: The first connection structure (21) further comprises: A second lifting ring (214), the second lifting ring (214) being fixedly mounted on the upper surface of the first rod (211) and away from one end of the main rod (3); A third lifting ring (215), the third lifting ring (215) being fixedly mounted on the side wall of the second rod (213); A No. 1 rope (216), one end of the No. 1 rope (216) being connected to one end of the No. 2 rod (213) close to the main rod (3); A No. 2 rope (217), one end of which is connected to the No. 3 lifting ring (215), and the No. 2 rope (217) passes through the No. 2 lifting ring (214); A sliding rod (218), wherein the sliding rod (218) is slidably mounted inside the main rod (3), and the other ends of the No. 1 rope (216) and the No. 2 rope (217) are both connected to the sliding rod (218). When the sliding rod (218) slides upward, the No. 2 rod (213) slides toward the inside of the No. 1 rod (211) under the pull of the No. 1 rope (216), and vice versa, the No. 2 rod (213) slides toward the outside of the No. 1 rod (211) under the pull of the No. 2 rope (217); A hydraulic rod (219), wherein the hydraulic rod (219) is fixedly installed inside the main rod (3), and the hydraulic rod (219) is used to control the upward and downward sliding of the sliding rod (218).

4. A construction device for reverse well construction in underground engineering according to claim 3, characterized in that: The side wall of the No. 2 rod (213) contains a plurality of No. 3 hanging rings (215), and the No. 2 rope (217) is connected to the No. 3 hanging rings (215).

5. A construction device for reverse well construction in underground engineering according to claim 4, characterized in that: A plurality of rollers (5) are rotatably mounted on the main rod (3), and the No. 2 rope (217) and the No. 1 rope (216) are both in contact with the rollers (5) on the main rod (3).

6. A construction device for reverse well construction in underground engineering according to claim 5, characterized in that: The device further comprises a grouting assembly (6), wherein the grouting assembly (6) comprises: An inclined plate (61), the inclined plate (61) being mounted on the outer periphery of the main rod (3); A circular ring (62), the circular ring (62) being rotatably mounted on the outer periphery of the inclined plate (61), and the circular ring (62) being provided with a circular hole for fixing a grouting device pipe; A material guide plate (63), wherein the material guide plate (63) is slidably mounted on the circular ring (62), and the material guide plate (63) adopts a telescopic structure, and the other end of the material guide plate (63) is mounted on the upper surface of the second rod (213).

7. A construction device for reverse well construction in underground engineering according to claim 6, characterized in that: The inclined plate (61) is slidably connected to the main rod (3) up and down, a telescopic rod (64) is rotatably mounted on the lower surface of the guide plate (63), and the guide plate (63) is connected to the second rod (213) through the telescopic rod (64).

8. A construction device for reverse well construction in underground engineering according to claim 7, characterized in that: The grouting assembly (6) further comprises a No. 3 rope (65) mounted on the inclined plate (61) and a No. 4 lifting ring (66) mounted on one side of the guide plate (63), one end of the No. 3 rope (65) being fixedly mounted on the movable end of the telescopic rod (64), and the No. 3 rope (65) passing through the No. 4 lifting ring (66).

9. A construction device for reverse well construction in underground engineering according to claim 8, characterized in that: The main rod (3) comprises two groups of connection components (2), and the two groups of connection components (2) are detachably connected.

10. A construction device for reverse well construction in underground engineering according to claim 9, characterized in that: The No. 1 connection structure (21) further comprises a gear (2110) fixedly mounted on the round rod (212), and a rack plate (2111) for driving the gear (2110) to rotate is fixedly mounted on the No. 1 rod (211).

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