Horizontal pipeline front end soil isolation device suitable for manual pipe jacking construction application

Abstract

The utility model discloses a soil isolation device at the front end of a horizontal pipeline, which is suitable for manual pipe jacking construction. The circular isolation main body is adopted as a soil body plugging device in the horizontal pipeline, the device is fastened to the wall of the horizontal pipeline by means of the edge jacking unit, on the basis, the construction window and door unit is arranged and can be opened and closed according to construction requirements, and the technical problem that water and soil enter a pipe due to the fact that a pipe opening is normally open is solved; meanwhile, an environment monitor for measuring pressure is arranged on the surface of the circular isolation main body, so that monitoring and early warning of the front environment before construction are realized; besides, a safety auxiliary door unit is arranged above the construction window door unit, vertical translation of a movable auxiliary door can be achieved by controlling a driving motor, under the normal condition of environment monitoring and early warning, the small-window movable auxiliary door is firstly opened to further confirm the front working condition, if earthwork collapse still occurs, the movable main door can be opened, and the movable main door can be opened. The pipe jacking construction is safely carried out, and the personal safety of constructors is doubly guaranteed.

Description

Technical Field

[0001] The embodiments of the utility model belong to the field of soil isolation of horizontal pipelines, and more specifically, relate to a soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction. Background Art

[0002] With the acceleration of urban construction, many cities will backfill along the waterfront during the development process to expand the urban area. The backfill materials used in the backfill construction have the characteristics of large filling volume, various types and large gaps. Pipe jacking construction is the most widely used in the current municipal pipe network construction. In order to improve the safety of pipe jacking construction, the current design mostly adopts closed mechanical pipe jacking construction. The success rate of mechanical pipe jacking is higher in areas with stable soil. However, when encountering old steel bars and large boulders during construction, the mechanical pipe jacking method will cause locking phenomenon. Generally, it can only be solved by clearing obstacles in advance, grouting, or "opening skylight wells". The cost is high, the risk is high, and the impact on surrounding structures and buildings is large. Therefore, in some working conditions, the manual pipe jacking method is used as the preferred solution. The construction safety under the manual pipe jacking method is the main consideration. During the construction process, geological disasters such as collapse are prone to occur in the pipe. Therefore, it is of great significance to propose an auxiliary device with high safety during manual pipe jacking construction.

[0003] The main construction steps of existing manual pipe jacking include: first, carry out construction preparation, determine the position, depth, and length of the pipe jacking, and formulate a construction plan; then, excavate a working pit at the starting point of the pipeline and set up the pipe jacking equipment; then install the jacking equipment, including the pipe jacking head and jacking irons; start the pipe jacking head and jack the pipeline into the soil section by section through the jacking iron; then connect the jacked pipeline with the laid pipeline to form a continuous pipeline; after the pipeline is laid, backfill the working pit with earth; finally, conduct quality inspection to ensure the safety and stability of the pipeline.

[0004] Although the above method can realize the jacking construction of horizontal pipelines, there are still the following technical problems or areas for improvement: (1) Since the manual jacking method requires construction workers to enter the horizontal pipeline and dig deep into the soil in front, there may be a technical problem that a large amount of soil may slide into the pipe due to the soil quality in front during the construction process, resulting in serious casualties. However, the above technical solution does not take protective measures for this. (2) In response to the technical problem described in (1), a safety protection system with integrated measurement and control can be proposed from the perspective of soil monitoring and isolation. (3) Groundwater is also one of the main factors causing geological disasters and an important factor in increasing the probability of soil collapse. Therefore, the waterproofness of the system and groundwater monitoring should be fully considered. Utility Model Content

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction. By adopting a circular isolation body as a soil plugging device in a horizontal pipeline, and by means of an edge tightening unit, the device is fastened to the horizontal pipeline wall. Based on this, by setting a construction window and door unit, it can be opened and closed according to construction needs, thereby preventing the technical problem of water and soil entering the pipe when the pipe mouth is always open; at the same time, an environmental monitor for measuring pressure is provided on the surface of the circular isolation body, thereby realizing monitoring and early warning of the front environment before construction; in addition, the utility model is provided with a safety sub-door unit above the construction window and door unit, and the up and down translation of the movable sub-door can be realized by controlling the driving motor. Under normal conditions of environmental monitoring and early warning, the small window movable sub-door is first opened to further confirm the working conditions in front. If there is still no soil collapse, the movable main door can be opened to safely carry out pipe jacking construction, doubly ensuring the personal safety of construction personnel.

[0006] In order to achieve the above-mentioned purpose, a soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction is provided, comprising:

[0007] A circular isolation body placed in a horizontal pipe, an edge tightening unit provided at the edge of the circular isolation body for tightening the connection to the inner wall of the horizontal pipe, a construction window and door unit provided at the center of the circular isolation body and capable of opening and closing, a safety sub-door unit provided above the construction window and door unit for a soil environment safety pre-opening test, and an environmental monitor provided on the side of the circular isolation body close to the soil body for sensing the front pressure, wherein the safety sub-door unit is slidably connected along the construction window and door unit;

[0008] The construction window and door unit comprises a movable main door, a side edge hinge assembly that keeps the side edge of the movable main door and the circular isolation body in rotational hinge connection, a primary door lock assembly and a secondary door lock assembly for locking the movable main door in an open and closed state, a door handle provided on the inner surface of the movable main door, and a main door water stop strip provided at the seams around the movable main door;

[0009] The safety sub-door unit includes a movable sub-door which is arranged at the upper end of the movable main door and can be opened and closed by moving up and down, a sub-door receiving area which is opened on the upper side of the inner surface of the movable main door, a second vertical rack fixedly connected to the bottom of the movable sub-door, a second transmission gear which is meshed with the second vertical rack for transmission, a driving motor which is fixedly connected to the inner surface of the movable sub-door and drives the second transmission gear to rotate, and sub-door water stop strips which are arranged at the seams around the movable sub-door.

[0010] Preferably, the edge tightening unit comprises:

[0011] A rack slide groove radially opened at the edge of the circular isolation body, a rack slide groove slidably connected to the rack slide groove, an end rigid top block fixedly connected to the protruding end of the rack slide groove for directly abutting against the inner wall of the horizontal pipe, a first transmission gear meshing with the rack slide groove, a central rotating rod with one end coaxially fixedly connected to the first transmission gear, a rotating handle provided at the other end of the central rotating rod, and a locking assembly for locking the rotation state of the central rotating rod;

[0012] A sealing ring is arranged on the front and rear sides of the end rigid top block, a sliding groove is opened at the outer edge of the circular isolation body, a sealing sliding block is arranged on the inner side of the sealing ring and seals and slides in the sliding groove, and a rigid connecting piece is arranged on the front and rear sides of the end rigid top block and embedded in the sealing ring.

[0013] Preferably, the locking assembly comprises:

[0014] A horizontal slide groove opening at the end of the central rotating rod, a slide cylinder fixedly connected to the rotating handle, a pin shaft vertically inserted through the horizontal slide groove opening and fixedly connected to the slide cylinder, a locking flange arranged on the inner side of the rotating handle, a locking area arranged on the rotating handle facing the circular isolation main body covering area, and locking grooves arranged in an equidistant circumferential array on the surface of the locking area; the locking flange is inserted and locked into the locking groove;

[0015] The end of the central rotating rod is kept in sliding connection with the inner cylinder of the slide cylinder.

[0016] Preferably, the side edge hinge assembly comprises:

[0017] A rotating shaft that keeps the movable main door and the circular isolation body in rotational connection, and a waterproof strip disposed in a gap between the circular isolation body and the movable main door.

[0018] Preferably, the primary door lock assembly comprises:

[0019] A base connecting block and a gate clamping block respectively connecting the movable main doors on the left and right sides, and a locking gate which is rotationally connected to the base connecting block and inserted and clamped with the gate clamping block.

[0020] Preferably, the secondary door lock assembly comprises:

[0021] A first support block fixed to the inner side of the movable main door, a second support block fixed to the inner surface of the horizontal pipe, and a support rod supported between the first support block and the second support block.

[0022] Preferably, the environmental monitor includes a soil pressure sensor and a pore water pressure sensor.

[0023] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0024] (1) The utility model is a soil isolation device for the front end of a horizontal pipe suitable for artificial pipe jacking construction. A circular isolation body is used as a soil plugging device in the horizontal pipe, and the device is fastened to the wall of the horizontal pipe by an edge tightening unit. Based on this, a construction window and door unit is set, which can be opened and closed according to construction needs, thereby preventing the technical problem of water and soil entering the pipe when the pipe mouth is always open. At the same time, an environmental monitor for measuring pressure is provided on the surface of the circular isolation body, thereby realizing monitoring and early warning of the front environment before construction. In addition, the utility model is provided with a safety sub-door unit above the construction window and door unit, and the movable sub-door can be moved up and down by controlling the driving motor. Under normal environmental monitoring and early warning conditions, the small window movable sub-door is first opened to further confirm the working condition in the front. If there is still no soil collapse, the movable main door can be opened to safely carry out pipe jacking construction, thereby doubly ensuring the personal safety of construction personnel.

[0025] (2) The utility model is a soil isolation device for the front end of a horizontal pipeline suitable for artificial jacking construction. It adopts a slide slot and latch structure to realize the pulling-out action of the rotating handle while ensuring the screw transmission between the rotating handle and the center rotating rod, and further provides a locking flange and a locking groove on this basis. By pressing down the rotating handle, the locking flange and the locking groove are inserted and matched, thereby limiting the free rotation of the center rotating rod and ensuring the tight positioning effect of the edge tightening unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main structure of a soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to an embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of an edge tightening unit of a soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to an embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the clamping area of ​​a soil isolation device at the front end of a horizontal pipeline suitable for artificial pipe jacking construction in an embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a side edge hinge assembly of a soil isolation device at the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to an embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of a secondary door lock assembly of a soil isolation device at the front end of a horizontal pipeline suitable for manual pipe jacking construction according to an embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the structure of a locking assembly of a soil isolation device at the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to an embodiment of the utility model;

[0032] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-horizontal pipeline, 2-isolating device, 200-circular isolating body, 210-edge tightening unit, 211-rack slide groove, 212-first vertical rack, 213-first transmission gear, 214-center rotating rod, 215-rotating handle, 216-locking assembly, 2161-horizontal slide groove, 2162-pin shaft, 2163-sliding cylinder, 2164-locking flange, 2165-locking area, 21650-locking groove, 217-end rigid top block, 218-sealing ring, 219-sealing sliding block, 2110-sliding groove, 2111-rigid connecting piece, 220 -Construction window and door unit, 221-movable main door, 222-side edge hinge assembly, 2221-rotating shaft, 2222-slit waterproof strip, 223-secondary door lock assembly, 2231-first support block, 2232-support rod, 2233-second support block, 224-first door lock assembly, 2241-base connecting block, 2242-locking gate, 2243-gate clamping block, 225-door handle, 226-main door water stop strip, 230-safety secondary door unit, 231-movable secondary door, 232-second vertical rack, 233-secondary door receiving area, 234-second transmission gear, 235-drive motor, 236-secondary door water stop strip, 240-environmental monitor. DETAILED DESCRIPTION

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0037] like Figures 1 to 6 As shown, in an embodiment of the utility model, the soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction includes:

[0038] A circular isolation body 200 placed in the horizontal pipe 1, an edge tightening unit 210 arranged at the edge of the circular isolation body 200 for tightening the inner wall of the horizontal pipe 1, a construction window and door unit 220 opened and closed at the center of the circular isolation body 200, a safety sub-door unit 230 arranged above the construction window and door unit 220 for a soil environment safety pre-opening test, and an environmental monitor 240 arranged on the side of the circular isolation body 200 close to the soil for sensing the front pressure, wherein the safety sub-door unit 230 is slidably connected along the construction window and door unit 220;

[0039] The construction window and door unit 220 includes a movable main door 221, a side edge hinge assembly 222 that keeps the side of the movable main door 221 rotatably hinged with the circular isolation body 200, a primary door lock assembly 224 and a secondary door lock assembly 223 for locking the movable main door 221 in an open or closed state, a door handle 225 provided on the inner surface of the movable main door 221, and a main door water stop strip 226 provided at the seams around the movable main door 221;

[0040] The safety sub-door unit 230 includes a movable sub-door 231 which is arranged at the upper end of the movable main door 221 and can be opened and closed by moving up and down, a sub-door receiving area 233 which is opened on the upper side of the inner surface of the movable main door 221, a second vertical rack 232 which is fixedly connected to the bottom of the movable sub-door 231, a second transmission gear 234 which maintains meshing transmission with the second vertical rack 232, a driving motor 235 which is fixedly connected to the inner surface of the movable sub-door 231 and drives the second transmission gear 234 to rotate, and a sub-door water stop strip 236 which is arranged at the seams around the movable sub-door 231.

[0041] In the embodiment of the utility model, a circular isolation body 200 is adopted as a soil plugging device in a horizontal pipe, and the device is fastened to the wall of the horizontal pipe by means of an edge tightening unit. Based on this, by setting a construction window and door unit 220, it can be opened and closed according to construction needs, thereby preventing the technical problem of water and soil entering the pipe due to the pipe mouth being always open; at the same time, an environmental monitor for measuring pressure is provided on the surface of the circular isolation body 200, thereby realizing monitoring and early warning of the front environment before construction; in addition, the utility model is provided with a safety sub-door unit above the construction window and door unit, and the upward and downward translation of the movable sub-door 231 can be realized by controlling the drive motor 235. Under normal conditions of environmental monitoring and early warning, the small window movable sub-door 231 is first opened to further confirm the working condition in front. If there is still no soil collapse, the movable main door 221 can be opened to safely carry out the pipe jacking construction, thereby doubly guaranteeing the personal safety of the construction personnel.

[0042] like Figure 1 and Figure 2 As shown, in the embodiment of the present utility model, the edge tightening unit 210 includes:

[0043] A rack slide groove 211 radially opened at the edge of the circular isolation body 200, a rack slide groove 211 slidably connected to the rack slide groove 211, an end rigid top block 217 fixedly connected to the protruding end of the rack slide groove 211 for directly abutting against the inner wall of the horizontal pipe 1, a first transmission gear 213 meshing with the rack slide groove 211, a center rotating rod 214 one end of which is coaxially fixedly connected to the first transmission gear 213, a rotating handle 215 provided at the other end of the center rotating rod 214, and a locking assembly 216 for locking the rotation state of the center rotating rod 214;

[0044] A sealing ring 218 is arranged on the front and rear sides of the end rigid top block 217, a sliding groove 2110 is opened at the outer edge of the circular isolation body 200, a sealing sliding block 219 is arranged on the inner side of the sealing ring 218 and seals and slides in the sliding groove 2110, and a rigid connecting piece 2111 is arranged on the front and rear sides of the end rigid top block 217 and embedded in the sealing ring 218.

[0045] like Figure 2 , Figure 3 and Figure 6 As shown, in the embodiment of the utility model, the locking assembly 216 includes:

[0046] A horizontal slide slot 2161 provided at the end of the central rotating rod 214, a slide cylinder 2163 fixedly connected to the rotating handle 215, a pin shaft 2162 vertically inserted through the horizontal slide slot 2161 and fixedly connected to the slide cylinder 2163, a positioning flange 2164 provided on the inner side of the rotating handle 215, a positioning area 2165 provided on the rotating handle 215 facing the covering area of ​​the circular isolation body 200, and positioning grooves 21650 provided in an equidistant circumferential array on the surface of the positioning area 2165; the positioning flange 2164 is inserted and engaged with the positioning grooves 21650;

[0047] The end of the central rotating rod 214 is in sliding connection with the inner cylinder of the slide cylinder 2163 .

[0048] In the embodiment of the utility model, a sliding groove and latch structure is adopted to realize the pulling-out action of the rotating handle 215, while ensuring the screw transmission between the rotating handle 215 and the central rotating rod 214, and a locking flange and a locking groove are added on this basis, so that by pressing down the rotating handle 215, the locking flange and the locking groove are inserted and matched, thereby limiting the free rotation of the central rotating rod 214 and ensuring the tight positioning effect of the edge tightening unit.

[0049] like Figure 1 and Figure 4 As shown, in the embodiment of the present utility model, the side edge hinge assembly 222 includes:

[0050] A rotating shaft 2221 that keeps the movable main door 221 and the circular isolation body 200 rotatably connected, and a sandwich waterproof strip 2222 disposed between the circular isolation body 200 and the movable main door 221 .

[0051] like Figure 1 As shown, in the embodiment of the utility model, the primary door lock assembly 224 includes:

[0052] A base connecting block 2241 and a gate clamping block 2243 respectively connecting the movable main doors 221 on the left and right sides, and a locking gate 2242 which is rotationally connected to the base connecting block 2241 and inserted and clamped with the gate clamping block 2243.

[0053] like Figure 1 and Figure 5 As shown, in the embodiment of the utility model, the secondary door lock assembly 223 includes:

[0054] A first support block 2231 fixed to the inner side of the movable main door 221 , a second support block 2233 fixed to the inner surface of the horizontal pipe 1 , and a support rod 2232 supported between the first support block 2231 and the second support block 2233 .

[0055] like Figure 1 As shown, in the embodiment of the present utility model, the environmental monitor 240 includes a soil pressure sensor and a pore water pressure sensor.

[0056] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction, characterized in that: include: A circular isolation body (200) placed in a horizontal pipe (1), an edge tightening unit (210) provided at the edge of the circular isolation body (200) for tightening against the inner wall of the horizontal pipe (1), a construction window and door unit (220) opened at the center of the circular isolation body (200) and capable of opening and closing, a safety sub-door unit (230) provided above the construction window and door unit (220) for a soil environment safety pre-opening test, and an environmental monitor (240) provided on the side of the circular isolation body (200) close to the soil for sensing the front pressure, wherein the safety sub-door unit (230) is slidably connected along the construction window and door unit (220); The construction window and door unit (220) comprises a movable main door (221), a side edge hinge assembly (222) for keeping the side edge of the movable main door (221) and the circular isolation body (200) in rotational hinge connection, a primary door lock assembly (224) and a secondary door lock assembly (223) for locking the movable main door (221) in an open or closed state, a door handle (225) provided on the inner surface of the movable main door (221), and a main door water stop strip (226) provided at the peripheral seams of the movable main door (221); The safety sub-door unit (230) comprises a movable sub-door (231) disposed at the upper end of the movable main door (221) and opening and closing by vertical translation, a sub-door receiving area (233) disposed on the upper side of the inner surface of the movable main door (221), a second vertical rack (232) fixedly connected to the lower side of the movable sub-door (231), a second transmission gear (234) meshing with the second vertical rack (232), a driving motor (235) fixedly connected to the inner surface of the movable sub-door (231) and driving the second transmission gear (234) to rotate, and a sub-door water stop strip (236) disposed at the seams around the movable sub-door (231).

2. According to claim 1, a soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction is characterized in that: The edge tightening unit (210) comprises: A rack slide groove (211) radially opened at the edge of the circular isolation body (200), a rack slide groove (211) slidably connected to the rack slide groove (211), an end rigid top block (217) fixedly connected to the protruding end of the rack slide groove (211) for directly abutting against the inner wall of the horizontal pipe (1), a first transmission gear (213) that maintains meshing transmission with the rack slide groove (211), a central rotating rod (214) one end of which is coaxially fixedly connected to the first transmission gear (213), a rotating handle (215) provided at the other end of the central rotating rod (214), and a locking assembly (216) for locking the rotation state of the central rotating rod (214); A sealing ring (218) is arranged on the front and rear sides of the end rigid top block (217), a sliding groove (2110) is opened at the outer edge of the circular isolation body (200), a sealing sliding block (219) is arranged on the inner side of the sealing ring (218) and seals and slides in the sliding groove (2110), and a rigid connecting piece (2111) is arranged on the front and rear sides of the end rigid top block (217) and embedded in the sealing ring (218).

3. The soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to claim 2 is characterized in that: The locking assembly (216) comprises: A horizontal slide groove (2161) provided at the end of the central rotating rod (214), a slide cylinder (2163) fixedly connected to the rotating handle (215), a pin shaft (2162) vertically inserted through the horizontal slide groove (2161) and fixedly connected to the slide cylinder (2163), a locking flange (2164) provided on the inner side of the rotating handle (215), a locking area (2165) provided on the rotating handle (215) facing the covering area of ​​the circular isolation body (200), and locking grooves (21650) provided in an equidistant circumferential array on the surface of the locking area (2165); the locking flange (2164) and the locking grooves (21650) are inserted and locked; The end of the central rotating rod (214) is in sliding connection with the inner cylinder of the slide cylinder (2163).

4. The soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to claim 1, characterized in that: The side edge hinge assembly (222) comprises: A rotating shaft (2221) that keeps the movable main door (221) and the circular isolation body (200) in rotational connection, and a sandwich waterproof strip (2222) provided between the circular isolation body (200) and the movable main door (221).

5. The soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to claim 4, characterized in that: The primary door lock assembly (224) comprises: A base connecting block (2241) and a gate clamping block (2243) respectively connected to the movable main doors (221) on the left and right sides, and a locking gate (2242) which is rotationally connected to the base connecting block (2241) and inserted and clamped with the gate clamping block (2243).

6. The soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to claim 5, characterized in that: The secondary door lock assembly (223) comprises: A first support block (2231) fixed to the inner side surface of the movable main door (221), a second support block (2233) fixed to the inner surface of the horizontal pipe (1), and a support rod (2232) supported between the first support block (2231) and the second support block (2233).

7. A soil isolation device for the front end of a horizontal pipeline suitable for artificial pipe jacking construction according to any one of claims 1 to 6, characterized in that: The environmental monitor (240) comprises a soil pressure sensor and a pore water pressure sensor.

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