Fabricated ditch supporting device of underneath passing building structure

Abstract

The invention relates to an assembly type ditch supporting device penetrating through a building structure downwards, which is applied to a blind ditch below the building structure and comprises a liner sleeve and a supporting assembly. The supporting assembly comprises a plurality of first arc-shaped plates and a plurality of second arc-shaped plates, the first arc-shaped plates are located on the outer side of the liner sleeve, and the second arc-shaped plates are located on the outer sides of the first arc-shaped plates; the plurality of first arc-shaped plates and the plurality of second arc-shaped plates are arranged in an annular array and are arranged in a staggered manner; the first arc-shaped plate, the second arc-shaped plate and the liner sleeve are concentrically arranged; the first arc-shaped plate and the second arc-shaped plate are connected through an elastic connecting piece. According to the fabricated ditch supporting device of the underneath penetrating building structure, the supporting assembly and the inner container sleeve are adopted for supporting in a constructed blind ditch, collapse in the pipeline construction process is avoided, the stability and safety of a ditch containing space are guaranteed, and the stability of the building structure is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of building drainage, and in particular relates to an assembled ditch support device passing under a building structure. Background Art

[0002] Underground ditches are usually made of concrete, ceramic or plastic pipes, buried underground, and used to drain rainwater and wastewater. Under the premise that there are building structures on the ground, when digging ditches underground, the foundation conditions of the building structure will be changed, which is likely to have an adverse effect on the stability of the building structure. For example, the Chinese invention patent with the existing patent number CN201310218410.9, "Composite rainwater drainage ditch with green plants planted on the top and construction method", in which the ditch includes the first, second and third drainage channel units, wherein: the first drainage channel unit is formed by longitudinally overlapping a group of molded parts with inverted trapezoidal cross sections and open at the top; the second drainage channel unit is formed by longitudinally overlapping a group of molded parts with trapezoidal cross sections and open at the bottom, and the top of the second drainage channel unit is provided with a first water permeable hole; the second drainage channel unit is connected above the first drainage channel unit to form a cavity with a hexagonal cross section; the third drainage channel unit is formed by longitudinally overlapping a group of molded parts with inverted trapezoidal cross sections and open at the top, and the bottom is provided with a second water permeable hole connected to the first water permeable hole; the third drainage channel unit is arranged above the second drainage channel unit. In this patent, when digging the ditch, the foundation of the building structure will be changed, which is likely to have an adverse effect on the stability of the building structure. Summary of the invention

[0003] The present application provides an assembled ditch support device that passes under a building structure, which can provide a support structure when digging a ditch underground, avoid adverse effects on the stability of the building structure, and ensure the stability of the building structure.

[0004] The present application provides an assembled ditch support device passing under a building structure, which is applied to a culvert under a building structure, wherein at least one section of the assembled ditch support device passing under the building structure is arranged in the culvert, and is characterized by comprising:

[0005] Inner casing,

[0006] A support assembly, the support assembly includes a plurality of first curved plates and a plurality of second curved plates, the plurality of first curved plates are located outside the inner liner sleeve, and the plurality of second curved plates are located outside the plurality of first curved plates; the plurality of first curved plates and the plurality of second curved plates are arranged in a circular array and are arranged alternately with each other; the first curved plate, the second curved plate and the inner liner sleeve are arranged concentrically; the first curved plate and the second curved plate are connected by an elastic connecting piece.

[0007] The above-mentioned assembled ditch support device passing under the building structure adopts support components and inner liner casing support in the hidden ditch under construction to avoid collapse during pipeline construction, ensure the stability and safety of the ditch accommodation space, and ensure the stability of the building structure.

[0008] In a technical solution of an embodiment, the elastic connecting member includes a spring, a telescopic rod is arranged inside the spring, and two ends of the telescopic rod are respectively connected to the first arc plate and the second arc plate.

[0009] In a technical solution of an embodiment, the first arc-shaped plate and the second arc-shaped plate are supported and shaped by a supporting connector.

[0010] In the technical solution of one embodiment, the supporting connecting member includes a bidirectional screw and two clamping blocks, the clamping block is H-shaped, the clamping block is provided with a threaded hole, and the two clamping blocks are threadedly mounted on both ends of the bidirectional screw; the end of the first arc plate is provided with a second clamping groove matching the clamping block, and the end of the second arc plate is provided with a first clamping groove matching the clamping block, and the two clamping blocks are respectively clamped in the first clamping groove and the second clamping groove at the corresponding ends.

[0011] In the technical solution of one embodiment, a plurality of sections of the assembled ditch support device for passing under the building structure are arranged in the culvert, and the plurality of sections of the assembled ditch support device for passing under the building structure are connected end to end; the inner walls at both ends of the inner liner casing are provided with right-angled trapezoidal grooves, and the end surfaces at both ends of the inner liner casing are provided with connecting holes, and the connecting holes are connected to the right-angled trapezoidal grooves; adjacent inner liner casings are connected by connecting bolts, and the connecting bolts are located in the connecting holes.

[0012] In the technical solution of one embodiment, a sealing ring is provided between the end faces of adjacent inner liner sleeves.

[0013] In a technical solution of an embodiment, an annular groove is formed on the end surface of the inner casing, and the sealing ring is located in the annular groove.

[0014] In a technical solution of one embodiment, the annular groove has a semicircular cross-section, and the cross-sectional diameter is less than or equal to the diameter of the sealing ring, and the sealing ring is embedded in the annular groove of the adjacent liner sleeve.

[0015] In a technical solution of an embodiment, the inner wall of the annular groove has multiple annular grooves for increasing the friction between the sealing ring and the annular groove.

[0016] In a technical solution of an embodiment, the sealing ring includes an annular rubber tube, a plurality of separating rubber plates are provided in the center of the annular rubber tube, a toothed colloid is provided between the connected separating rubber plates, and a semi-annular colloid is provided in the triangle formed by the toothed colloid and the separating rubber plates.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in this application are used to illustrate preferred embodiments, so as to facilitate a person skilled in the art to clearly understand various other advantages and benefits, and should not be considered as limiting this application. In addition, the same reference numerals are used to represent the same components in all the drawings.

[0019] Figure 1 It is a three-dimensional schematic diagram of an assembled ditch support device that passes under a building structure in one embodiment of the present application.

[0020] Figure 2 It is a schematic diagram of the splicing of two sections of assembled ditch support devices that pass under a building structure in one embodiment of the present application.

[0021] Figure 3 It is a schematic diagram of an exploded view of a two-section assembled ditch support device that passes under a building structure in one embodiment of the present application.

[0022] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0023] Figure 5 It is a three-dimensional schematic diagram of a support member in one embodiment of the present application.

[0024] Figure 6 It is a cross-sectional schematic diagram of a sealing ring in one embodiment of the present application.

[0025] Figure 7 It is a schematic diagram of the installation of an assembled ditch support device that passes under a building structure in one embodiment of the present application.

[0026] Description of Figure Numbers:

[0027] 100. Prefabricated ditch support device passing under building structure;

[0028] 110, inner casing; 111, annular groove; 112, right-angle trapezoidal groove; 113, connecting hole;

[0029] 120, support assembly; 121, first arc plate; 122, second arc plate; 123, elastic connector; 124, support connector; 125, bidirectional screw; 126, clamping block; 127, first clamping slot; 128, second clamping slot;

[0030] 130, sealing ring; 131, annular rubber hose; 132, separating rubber plate; 133, toothed colloid (triangular wave); 134, semi-ring colloid;

[0031] 140. Connecting bolts;

[0032] 210. Vertical shaft; 220. Culvert. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application 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 embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] This application is based on a certain ditch project. There is a section of the ditch with building structures and pipelines. It is necessary to renovate the ditch without disturbing the building. Before excavating the underground pipeline ditch, sufficient preparation is required. First of all, a detailed construction plan and construction plan need to be formulated to clarify the steps and processes of the construction. Secondly, an on-site survey is required to determine the geological conditions, pipeline layout and possible obstacles in the construction area. The main problems of using the ditch construction plan in the existing technology are high construction difficulty and low construction efficiency. This is mainly because under the premise that there is a building structure on the ground, the existing technology lacks synchronous support when digging ditches underground, which can easily have an adverse effect on the stability of the building structure.

[0039] An embodiment of the present application provides an assembled ditch support device 100 that passes under a building structure, which is used in a culvert 220 below the building structure. After excavating the culvert 220, the assembled ditch support devices 100 that pass under the building structure are simultaneously filled (the number of assembled ditch support devices 100 that pass under the building structure is determined according to the length of the culvert 220). The assembled ditch support devices 100 that pass under the building structure are used to synchronously support the excavated culvert 220 to ensure the stability of the building structure, thereby achieving quick and undisturbed construction of the ditch for the surrounding environment, reducing construction difficulty and improving construction efficiency.

[0040] See also Figure 1-Figure 7The assembled ditch support device 100 for passing under a building structure can mainly include an inner casing 110 and a support assembly 120. The support assembly 120 includes a plurality of first curved plates 121 and a plurality of second curved plates 122. The plurality of first curved plates 121 are located outside the inner casing 110, and the plurality of second curved plates 122 are located outside the plurality of first curved plates 121. The plurality of first curved plates 121 and the plurality of second curved plates 122 are arranged in an annular array and staggered with each other, that is, the second curved plates 122 are arranged opposite to the gaps between adjacent first curved plates 121. Moreover, the first curved plates 121, the second curved plates 122 and the inner casing 110 are arranged concentrically and coaxially. The first curved plates 121 and the second curved plates 122 are connected by an elastic connector 123. The above-mentioned prefabricated ditch support device 100 that passes under the building structure can be deployed when the excavation length of the ditch 220 is greater than the prefabricated ditch support device 100 that passes under the building structure while the ditch 220 is being constructed. It can support the accommodating space of the ditch 220 at different points in the first place to ensure the stability and safety of the ditch accommodating space. Specifically, it is supported by the support assembly 120 and the inner liner casing 110, which is suitable for long-distance construction, avoids collapse during pipeline construction, ensures the stability and safety of the ditch accommodating space, and ensures the stability of the building structure. Moreover, the deployment process of the prefabricated ditch support device 100 that passes under the building structure does not occupy ground space and can be carried out simultaneously with other construction work. By providing a support assembly 120 composed of multiple first curved plates 121 and multiple second curved plates 122 connected by elastic connectors 123, the support assembly 120 can be elastically expanded and contracted, and the expansion and contraction direction is inward contraction and outward expansion; when the diameter of the culvert 220 is small, the multiple second curved plates 122 can resist the culvert 220 wall under the elastic action of the elastic connector 123, and when the inner liner casing 110 is subjected to force, it can also push the multiple first curved plates 121 to expand under the action of the elastic connector 123, so as to ensure the practical flexibility of the assembled ditch support device 100 that passes under the building structure, and can eliminate stress and vibration force during installation through the expansion and contraction characteristics.

[0041] It can be understood that in order to ensure the stability of the connection between the first curved plate 121 and the second curved plate 122, there are multiple elastic connectors 123, which are divided into two rows. The two rows of elastic connectors 123 are connected to the overlapping surfaces of the first curved plate 121 and the second curved plate 122, and are preferably evenly distributed along the length direction.

[0042] It is understandable that the inner tube 110 may preferably be made of plastic having a certain elastic deformation capability.

[0043] In some embodiments, the elastic connector 123 includes a spring, a telescopic rod is disposed inside the spring, and the two ends of the telescopic rod are respectively connected to the first arc plate 121 and the second arc plate 122. The telescopic rod can limit and guide the telescopic trajectory of the spring to prevent the spring from swinging in all directions during the telescopic process and affecting the supporting effect.

[0044] In some embodiments, the outer wall of the second arc plate 122 is a rough surface, and the rough surface of the second arc plate 122 can increase the adhesion with the groove wall of the dark groove 220, especially with the cooperation of the elastic connecting member 123.

[0045] In some embodiments, the first curved plate 121 and the second curved plate 122 are supported and shaped by supporting connectors 124. The second curved plate 122 is supported and limited by a plurality of supporting connectors 124, so that the second curved plate 122 is firmly supported, so that there will be no force resonance effect after the pipeline construction is completed, thereby ensuring the quality of the pipeline construction.

[0046] Specific to Figure 4 and Figure 5 In the embodiment shown, the supporting connecting member 124 includes a bidirectional screw rod 125 and two clamping blocks 126. Figure 5 The clamping block 126 is h-shaped, and the clamping block 126 is provided with a threaded hole. The two clamping blocks 126 are threadedly mounted on the two ends of the bidirectional screw 125. The end of the first arc plate 121 is provided with a second clamping groove 128 matching the clamping block 126, and the end of the second arc plate 122 is provided with a first clamping groove 127 matching the clamping block 126. During installation, the two clamping blocks 126 are respectively clamped in the first clamping groove 127 and the second clamping groove 128 of the corresponding ends. Through the clamping and matching of the clamping block 126 with the first clamping groove 127 and the second clamping groove 128 of the first arc plate 121 and the second arc plate 122, installation and disassembly are convenient, and the structure is simple. In addition, the clamping block 126 and the bidirectional screw 125 are threadedly matched, and the spacing between the two clamping block 126 brackets can be adjusted by rotating the bidirectional screw 125, so as to realize the adjustable distance connection of the first arc plate 121 and the second arc plate 122.

[0047] For details, see Figure 4 In the embodiment shown, the card slot (including the first card slot 127 and the second card slot 128) consists of a notch and a slot deep in the notch, and the overall shape is similar to Figure 5 The H-shaped clamping block 126 is matched with the notch and the slot. The H-shaped clamping block 126 is matched with the notch and the slot, which provides a balanced force for the positioning connection work and reserves the connection space. The notch and the slot increase the connection angle and connection area with the H-shaped clamping block 126.

[0048] In some embodiments, when the culvert 220 is several times or dozens of times the length of the prefabricated ditch support device 100 that passes under the building structure, multiple sections of prefabricated ditch support devices 100 that pass under the building structure need to be configured in the culvert 220. The multiple sections of prefabricated ditch support devices 100 that pass under the building structure are connected end to end and installed synchronously. The connection between adjacent prefabricated ditch support devices 100 that pass under the building structure is achieved by connecting adjacent inner liner casings 110 with connecting bolts 140. Specifically, see Figure 3 , Figure 4 , the inner walls of both ends of the inner liner sleeve 110 are provided with right-angled trapezoidal grooves 112, and the end surfaces of both ends of the inner liner sleeve 110 are provided with connecting holes 113, and the connecting holes 113 are connected with the right-angled trapezoidal grooves 112; the adjacent inner liner sleeves 110 are connected by connecting bolts 140, and the connecting bolts 140 are located in the connecting holes 113. When connecting, the connecting holes 113 of the adjacent inner liner sleeves 110 are aligned first, and the connecting bolts 140 can be inserted through the right-angled trapezoidal grooves 112 and connected with the nuts in the other right-angled trapezoidal grooves 112. Specifically, the right-angled trapezoidal groove 112 can accommodate the connecting bolt 140 or the nut, wherein the inclined surface of the right-angled trapezoidal groove 112 can guide the insertion operation to be smoother, and the connecting hole 113 facilitates the insertion of the connecting bolt 140. On this basis, the nut connects the connecting bolt 140 to effectively connect the two inner liner sleeves 110, and the effective connection trajectory is distributed in a circular shape to ensure the uniformity of the connection work under the stress state.

[0049] In some embodiments, a sealing ring 130 is disposed between end surfaces of adjacent liner sleeves 110 to increase the sealing performance between adjacent liner sleeves 110 .

[0050] Specifically, an annular groove 111 is opened on the end surface of the inner casing sleeve 110 , and the sealing ring 130 is located in the annular groove 111 to position the sealing ring 130 .

[0051] Furthermore, the cross-section of the annular groove 111 can adopt a semicircular cross-section, and the cross-section diameter is less than or equal to the diameter of the sealing ring 130. The sealing ring 130 is embedded in the annular groove 111 of the adjacent inner liner sleeve 110, so that the sealing ring 130 can appropriately perform the deformation work after compression. The deformation process fills each position point of the annular groove 111 to ensure the sealing effect.

[0052] Furthermore, the inner wall of the annular groove 111 has multiple annular grooves for increasing the friction between the sealing ring 130 and the annular groove 111 , so that the sealing ring 130 is not easy to fall off from the annular groove 111 during the extrusion deformation process.

[0053] In some embodiments, the sealing ring 130 includes an annular rubber tube 131, and a plurality of separating rubber plates 132 are provided in the center of the annular rubber tube 131, and a toothed colloid 133 is provided between the connected separating rubber plates 132, and a semi-ring colloid 134 is provided in the triangle formed by the toothed colloid 133 and the separating rubber plates 132. The plurality of separating rubber plates 132 can gradually increase the resistance of the extrusion deformation process of the annular rubber tube 131 to ensure the deformation balance effect; the toothed colloid 133 can further divide the deformation process of the surfaces of the plurality of separating rubber plates 132 in a single direction into the deformation process of multiple points in another direction, so as to ensure the quality of its deformation work. When the toothed colloid 133 is deformed to a certain extent, it compresses the semi-ring colloid 134 to deform, thereby increasing its restraining effect in the double deformation process, and avoiding damage to the annular rubber tube 131 caused by excessive deformation amplitude or excessive deformation speed.

[0054] In summary, a construction process of this application includes the following steps:

[0055] S1, when constructing the culvert 220, first, a vertical shaft 210 is dug out on the ground using a drilling rig or a coring machine (participate in Figure 7 ), a culvert 220 greater than the length of a single assembled ditch support device 100 passing under the building structure is opened in the shaft 210, and the drilling rig can stay in the culvert 220 away from the pipe network;

[0056] S2, first partially insert the first curved plate 121 and the second curved plate 122 of the assembled ditch support device 100 that passes under the building structure into the dark ditch 220, and a plurality of second curved plates 122 fit with the dark ditch 220, and a plurality of springs are also expanded and contracted accordingly according to the diameter of the dark ditch 220; then, the inner liner sleeve 110 is installed; and then the clamping block 126 is respectively inserted into the clamping grooves of the first curved plate 121 and the second curved plate 122, and the distance between the two clamping blocks 126 is adjusted by the spiral rotation of the bidirectional screw 125, so that the gap distance between the first curved plate 121 and the second curved plate 122 is adjusted and fixed;

[0057] S3, the installation method of the next prefabricated ditch support device 100 passing under the building structure refers to the above steps. During the installation process, it is necessary to shrink the first curved plate 121 and the second curved plate 122 and the inner liner sleeve 110 to achieve unobstructed installation until the two prefabricated ditch support devices 100 passing under the building structure are combined into a row; during this process, the sealing ring 130 is set between the two annular grooves 111, and the sealing ring 130 is pressed and sealed by the opposing combination of the two inner liner sleeves 110;

[0058] S4, place the connecting bolt 140 in one of the right-angle trapezoidal grooves 112, place the matching nut in the corresponding right-angle trapezoidal groove 112, and connect the connecting bolt 140 through the connecting hole 113 and the nut, thereby completing the fastening connection of the two assembled ditch support devices 100 passing under the building structure. This operation can also be used for open channels.

[0059] In summary, the beneficial effects of this application include:

[0060] (1) The present application adopts the method of arranging several prefabricated ditch support devices under the building structure in the culvert, so that the several prefabricated ditch support devices under the building structure support the culvert, which is suitable for long-distance construction pipelines and solves the problem of avoiding collapse during pipeline construction. Moreover, the arrangement process of the several prefabricated ditch support devices under the building structure does not occupy ground space and can be carried out simultaneously with other construction work.

[0061] (2) The present application adopts a method in which the prefabricated ditch support device that passes under the building structure can be deployed when the length of the culvert excavation is greater than that of the prefabricated ditch, so as to provide point support for the culvert accommodation space at the first time; the first curved plates and the second curved plates in the inner and outer spaces of the prefabricated ditch support device that passes under the building structure can be retracted and extended by a plurality of springs, so that the prefabricated ditch support device that passes under the building structure later can be inserted into the support space of the prefabricated ditch support device that passes under the building structure earlier without hindrance, and the pipeline stress and vibration force during the installation process can be eliminated through the telescopic characteristics, so that the ditch accommodation space is stable and safe.

[0062] (3) The present application adopts a plurality of supporting connectors to support and limit the first arc plate and the second arc plate, thereby solving the force resonance effect that will occur after the pipeline construction is completed, ensuring a firm support state, and ensuring the quality of the pipeline construction.

[0063] (4) The present invention uses connecting bolts to quickly connect two prefabricated ditch support devices passing under the building structure. In the process, the two prefabricated ditch support devices passing under the building structure can squeeze the sealing ring to improve the sealing performance, thereby ensuring high efficiency and quality during the ditch construction process.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An assembled ditch support device for passing under a building structure, which is applied to a culvert below a building structure, wherein at least one section of the assembled ditch support device for passing under the building structure is arranged in the culvert, and is characterized in that: include: Inner casing, A support assembly, the support assembly includes a plurality of first curved plates and a plurality of second curved plates, the plurality of first curved plates are located outside the inner liner sleeve, and the plurality of second curved plates are located outside the plurality of first curved plates; the plurality of first curved plates and the plurality of second curved plates are arranged in a circular array and are arranged alternately with each other; the first curved plate, the second curved plate and the inner liner sleeve are arranged concentrically; the first curved plate and the second curved plate are connected by an elastic connecting piece.

2. The assembled ditch support device for passing under a building structure according to claim 1, characterized in that: The elastic connecting member comprises a spring, a telescopic rod is arranged inside the spring, and two ends of the telescopic rod are respectively connected to the first arc plate and the second arc plate.

3. The assembled ditch support device for passing under a building structure according to claim 1, characterized in that: The first arc-shaped plate and the second arc-shaped plate are supported and shaped by a supporting connecting member.

4. The assembled ditch support device for passing under a building structure as claimed in claim 3, characterized in that: The supporting connecting piece includes a bidirectional screw and two clamping blocks, the clamping block is H-shaped, the clamping block is provided with a threaded hole, and the two clamping blocks are threadedly mounted on both ends of the bidirectional screw; the end of the first arc plate is provided with a second clamping groove matching the clamping block, and the end of the second arc plate is provided with a first clamping groove matching the clamping block, and the two clamping blocks are respectively clamped in the first clamping groove and the second clamping groove at the corresponding ends.

5. The assembled ditch support device for passing under a building structure according to claim 1, characterized in that: A plurality of sections of the assembled ditch support device for passing under the building structure are arranged in the culvert, and the plurality of sections of the assembled ditch support device for passing under the building structure are connected end to end; the inner walls at both ends of the inner liner casing are provided with right-angled trapezoidal grooves, and the end faces at both ends of the inner liner casing are provided with connecting holes, and the connecting holes are connected with the right-angled trapezoidal grooves; adjacent inner liner casings are connected by connecting bolts, and the connecting bolts are located in the connecting holes.

6. The assembled ditch support device for passing under a building structure according to claim 5, characterized in that: A sealing ring is arranged between the end faces of adjacent inner liner sleeves.

7. The assembled ditch support device for passing under a building structure according to claim 6, characterized in that: An annular groove is formed on the end surface of the inner casing, and the sealing ring is located in the annular groove.

8. The assembled ditch support device for passing under a building structure according to claim 7, characterized in that: The annular groove has a semicircular cross section, and the cross section diameter is less than or equal to the diameter of the sealing ring. The sealing ring is embedded in the annular groove of the adjacent liner sleeve.

9. The assembled ditch support device for passing under a building structure according to claim 1, characterized in that: The inner wall of the annular groove is provided with multiple annular grooves for increasing the friction between the sealing ring and the annular groove.

10. The assembled ditch support device for passing under a building structure according to claim 9, characterized in that: The sealing ring comprises an annular rubber tube, wherein a plurality of separating rubber plates are provided at the center of the annular rubber tube, a toothed colloid is provided between the connected separating rubber plates, and a semi-annular colloid is provided in the triangle formed by the toothed colloid and the separating rubber plates.

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