Telescopic pipeline foundation pit supporting device

Abstract

The utility model discloses a telescopic pipeline foundation pit supporting device which is integrally of a frame structure and comprises two oppositely-arranged frameworks and a telescopic connecting rod connected between the frameworks and used for adjusting the distance between the two frameworks, and each framework comprises two supporting columns arranged in a spaced mode and a supporting transverse rod connected with the two supporting columns. First sliding grooves from top to bottom are formed in the outer sides of the two supporting columns of the framework on the same face, second sliding grooves from top to bottom are formed in the outer sides of the two supporting columns of the framework on the same side of the framework on the different faces, and supporting plates used for supporting the side wall of the pipeline foundation pit are inserted into the first sliding grooves and the second sliding grooves. The telescopic pipeline foundation pit supporting device is convenient to transport and install, and the foundation pit supporting quality is improved.

Description

Technical Field

[0001] The utility model belongs to the field of foundation pit support, and specifically relates to a telescopic pipeline foundation pit support device. Background Art

[0002] Pipeline foundation pit support refers to the support measures taken during pipeline construction to prevent soil collapse and protect pipelines and surrounding facilities. Foundation pit support is an important part of pipeline foundation pit construction. Its working principle is to take reinforcement measures to protect the side walls of the foundation pit and the surrounding environment, including support type support and reinforcement type support. Foundation pit support plays an important role in protecting the safety of underground structures and the surrounding environment, and is the key to ensuring the quality of foundation pit construction.

[0003] Existing foundation pit support methods include: (1) Earth support: using steel supports, concrete walls or excavation machinery to support the soil to prevent soil collapse from affecting the pipeline; (2) Pile support: installing pile foundations around the pipeline or in the crossing area, and using the bearing capacity of the pile foundations to support the soil to prevent soil collapse from affecting the pipeline; (3) Underground continuous wall support: when digging deep foundation pits in the pipeline construction area, using concrete continuous walls as support structures to prevent soil collapse from affecting the pipeline.

[0004] CN219137715U discloses a pipeline foundation pit support device, including four connecting pipes, a plurality of supporting steel pipes are arranged on one side of each two connecting pipes, and a plurality of supporting beams are arranged between each two connecting pipes; an adjusting component, wherein the installation component is arranged between the two connecting pipes and is used to adjust the supporting beams. By setting a connecting frame, when it is necessary to install the pipeline, the supporting beams will hinder the pipeline pit, and the staff can lift the supporting beams to separate the slots and blocks at the bottom of the supporting beams, and then put down the supporting beams after the pipeline installation is completed. By setting a connecting block, when the pipeline foundation pit is long and multiple connecting pipes need to be connected together to support the foundation pit, the connecting groove of one of the connecting pipes can be inserted into the connecting block on another connecting pipe.

[0005] CN217298953U discloses a municipal pipeline foundation pit well point dewatering excavation support device, which belongs to the technical field of municipal construction equipment, including a first support plate, a second support plate and a connecting sleeve, wherein a first slide groove is formed on both sides of one side wall of the first support plate, a plug plate is arranged in the first slide groove, and the second support plate is arranged on the periphery of one end of the plug plate away from the first support plate, a second slide groove is formed at the position where the second support plate is connected to the plug plate, the connecting sleeve is arranged between the first support plate and the second support plate, and a first through hole is arranged at the middle upper end of the connecting sleeve.

[0006] CN212983886U discloses a pipeline foundation pit support, comprising: a pile row, wherein the pile row comprises a vertical pole, wherein the vertical pole is a round tube, the vertical pole is vertically arranged, and a plurality of the vertical poles are arranged in sequence and transversely spaced apart, wherein two rows of piles are arranged side by side and opposite to each other, the inner side is between the two rows of piles, and the two rows of piles are separated by a distance; a waist beam, wherein the waist beam is horizontally arranged on the upper part of the row of piles, and the two waist beams are respectively arranged on the inner sides of the two rows of piles; a strut, wherein the two ends of the strut are respectively in contact with the two waist beams, and all the struts are arranged between the two waist beams, and all the struts are arranged in sequence and spaced apart; and a baffle, wherein at least one baffle is arranged on the outer side of each row of piles.

[0007] The above-mentioned foundation pit support methods have some disadvantages and drawbacks, including: (1) High cost: Traditional foundation pit support methods usually require a large amount of materials and manpower, and are relatively costly. For example, the use of steel supports, concrete walls or pile foundations requires a large amount of material and manpower costs; (2) Long construction period: Traditional foundation pit support methods have a long construction period and require a long time to complete the foundation pit support project, thus affecting the entire construction progress; (3) Great impact on the surrounding environment: Traditional foundation pit support methods will have a certain degree of impact on the surrounding environment and underground pipelines and other facilities. For example, the construction of underground continuous walls will cause vibration and impact on surrounding buildings and underground pipelines. Utility Model Content

[0008] In view of the problems existing in the existing pipeline foundation pit support, the utility model provides a telescopic pipeline foundation pit support device, which is not only convenient for transportation and installation during the foundation pit support construction process, but also can improve the foundation pit support quality.

[0009] The utility model provides a telescopic pipeline foundation pit supporting device, which is a frame structure as a whole and is used to be placed in the pipeline foundation pit, including two side frames arranged opposite to each other and a telescopic connecting rod connected between the frames for adjusting the spacing between the two side frames, each side frame includes two pillars arranged at intervals and a supporting cross bar connecting the two pillars, the telescopic connecting rod is connected between two corresponding pillars of the two side frames, the telescopic connecting rod and the supporting cross bar form a square frame with a closed loop cross section, wherein the four pillars of the two side frames form the vertices of the square frame, a first slide groove from top to bottom is provided on the outer sides of two pillars of the same side frame, a second slide groove from top to bottom is provided on the outer sides of two pillars on the same side of different side frames, and a support plate for supporting the side wall of the pipeline foundation pit is inserted into the first slide groove and the second slide groove.

[0010] Furthermore, a horizontal line connecting two pillars of one side frame is parallel to a horizontal line connecting two pillars of another side frame, the cross section of the pillar is square, including two inner side surfaces and two outer side surfaces, the two side surfaces connected to the supporting cross bar and the telescopic connecting rod are respectively a first inner side surface and a second inner side surface, the first outer side surface is opposite to the first inner side surface, and the second outer side surface is opposite to the second inner side surface, the first slide groove and the second slide groove are formed by fixing (for example, welding) one plate (side plate) of an L-shaped plate (for example, an L-shaped steel plate, formed by vertically connecting two plates) to the first outer side surface and leaving a gap between the second outer side surface of the pillar and another plate (cross plate) of the L-shaped plate, wherein the first slide groove is formed by the gap between the second outer side surfaces of two pillars of the same side frame and another plate (cross plate) of the L-shaped plate, and the second slide groove is formed by the gap between one plate (side plate) of the L-shaped plate (for example, an L-shaped steel plate, formed by vertically connecting two plates) fixed to the first outer side surface of the pillar and the telescopic connecting rod. The height of the pillar is consistent with or greater than the depth of the pipeline foundation pit. The pillar can be, for example, a square channel steel. The cross-sectional size of the square channel steel is not less than 100×50mm, for example 80~150mm×40~80mm, preferably about 100×50mm, the wall thickness is not less than 3.5mm, for example 3.5-5mm, preferably about 3.5mm, and the height is not less than 2m, preferably about 2-4m.

[0011] Furthermore, the support cross bar is vertically connected to the first inner side surface of the pillar so that the support cross bar is in a horizontal state. The number of support cross bars is preferably more than two, for example, two, three or four. The multiple support cross bars are parallel to each other and are arranged at different heights of the pillar. The distance between adjacent support cross bars can be, for example, 1 / 6-1 / 2 of the length or height of the pillar, preferably 1 / 4-1 / 2. The support cross bar is connected to the pillar, for example, by welding. The length of the support cross bar is adapted to the width or length of the pipeline foundation pit, for example, slightly smaller than the width or length of the pipeline foundation pit. The support cross bar can be, for example, a Φ57 circular steel pipe with a length of not less than 2m, preferably about 2m, and can also be customized according to common foundation pit sizes in the project.

[0012] Further, the L-shaped plate includes a vertically connected transverse plate and a side plate, wherein the transverse plate is parallel to the second outer side surface, and the distance between the transverse plate and the second outer side surface can be, for example, 8-15 mm, preferably about 10 mm, and the L-shaped plate can be, for example, an angle steel with a thickness of not less than 3 mm, preferably about 3 mm. Generally, the length of the first chute is consistent with the height of the pillar.

[0013] Furthermore, the two ends of the telescopic connecting rod are respectively vertically connected to the same side pillars of the two-sided skeleton. The telescopic connecting rod includes an externally threaded rod and an internally threaded sleeve threadedly connected to the externally threaded rod. One end of the externally threaded rod is connected to the pillar of one of the side skeletons, and the other end is threadedly connected to the internally threaded sleeve. The end of the internally threaded sleeve away from the externally threaded rod is connected to the pillar of the other side skeleton.

[0014] Furthermore, a first through hole is formed at one end of the externally threaded rod connected to a pillar of one side of the skeleton, a second through hole is formed at one end of the internally threaded sleeve away from the externally threaded rod, a plurality of short sleeves arranged along the length direction of the second inner side surface are fixed on the second inner side surface, the short sleeves serve as sockets for the externally threaded rod and the internally threaded sleeve, and at least two short sleeves are provided on each pillar. The short sleeves may be, for example, short tubes of Φ48, and the length may be, for example, 0.1-0.5m, preferably about 0.3m. A third through hole is formed on the short sleeve for socketing the externally threaded rod, and a fourth through hole is formed on the short sleeve for socketing the internally threaded sleeve, the distance between the third through hole and the pillar is equal to the distance between the first through hole and the end of the externally threaded rod (the end away from the external thread), and the distance between the fourth through hole and the pillar is equal to the distance between the second through hole and the end of the internally threaded sleeve (the end away from the internal thread). The first through hole, the second through hole, the third through hole and the fourth through hole can be, for example, M20 bolt holes. First, one end of the multiple telescopic connecting rods is inserted into the short sleeve of one of the side frames in turn, and then the other end of the telescopic connecting rod is inserted into the short sleeve of the other side frame. The length of the external threaded rod screwed into the internal threaded sleeve is adjusted so that the distance between the two side frames is close to the length or width of the pipeline foundation pit. The first through hole and the third through hole are overlapped and bolts (for example, M16 hexagonal head long bolts) are inserted and then tightened with matching nuts to achieve the connection of the two side frames and combine into a frame structure. The second through hole and the fourth through hole are overlapped and bolts are inserted and then tightened with matching nuts. When the first through hole and the third through hole or the second through hole and the fourth through hole do not overlap, the insertion distance of the external threaded rod and the internal threaded sleeve in the socket is adjusted to make them overlap.

[0015] Furthermore, support plates are respectively inserted into the two first chutes and one of the second chutes. The support plates support the side walls of the pipeline foundation pit to prevent the side walls from collapsing. The support plates can be, for example, a composite plate with a thickness of 9 mm or a steel plate with a thickness of 3-5 mm. The length of the support plate is consistent with the length of the pillar, and the width is consistent with the length of the support cross bar or the telescopic connecting rod.

[0016] Furthermore, an LED warning light is fixed on the top of the pillar.

[0017] Beneficial effects of the utility model:

[0018] The utility model discloses a telescopic pipeline foundation pit support device. By adjusting the length of the external threaded rod screwed into the internal threaded sleeve, the distance between the two-sided skeletons is adjusted to adapt to pipeline foundation pits of different sizes, so as to realize telescopic adjustment and improve the applicability and flexibility of the device. After use, the nut is loosened, the nut is removed, the telescopic connecting rod is removed from the two-sided skeleton, and the external threaded rod is screwed out of the internal threaded sleeve, so as to reduce the footprint of the entire device and facilitate transportation. The support plates in the first chute and the second chute support the side wall of the pipeline foundation pit to prevent the side wall from collapsing, ensure the safety of the construction personnel in the support device, and ensure the safe progress of the project. An LED warning light is arranged on the top of the pillar, which can provide nighttime warnings and safety reminders, and enhance the safety and visibility of the device. The utility model discloses a telescopic pipeline foundation pit support device. The overall structure is simple. Through the mutual cooperation of the pillar, the support cross bar and the telescopic connecting rod, a stable support structure is formed to ensure the stability and reliability of the support device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of a telescopic pipeline foundation pit supporting device.

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0021] Figure 3 It is a structural schematic diagram of the plug-in support plate.

[0022] Figure 4 The utility model is a top view of a telescopic pipeline foundation pit supporting device.

[0023] Figure 5 It is a left view of a telescopic pipeline foundation pit supporting device of the utility model.

[0024] Figure 6 It is a front view of a telescopic pipeline foundation pit supporting device of the utility model.

[0025] Figure 7 This is a partial detail diagram of a telescopic pipeline foundation pit supporting device of the utility model.

[0026] Reference numerals:

[0027] 1-telescopic connecting rod, 100-externally threaded rod, 101-internally threaded sleeve, 2-pillar, 201-first inner side, 202-second inner side, 203-first outer side, 204-second outer side, 3-support cross bar, 4-first slide groove, 401-L-shaped plate, 4011-first vertical plate, 4012-second vertical plate, 5-second slide groove, 501-long strip plate, 6-short sleeve, 7-bolt, 8-nut, 9-support plate, 10-LED warning light. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings.

[0029] like Figure 1-7 As shown, the utility model provides a telescopic pipeline foundation pit supporting device, which is a frame structure as a whole and is used to be placed in the pipeline foundation pit, including two relatively arranged side frames and a telescopic connecting rod 1 connected between the frames for adjusting the spacing between the two side frames, each side frame includes two spaced-apart pillars 2 and a supporting cross bar 3 connecting the two pillars 2, the telescopic connecting rod 1 is connected between the corresponding two pillars 2 of the two side frames, the telescopic connecting rod 1 and the supporting cross bar 3 form a square frame with a closed loop cross section, wherein the four pillars of the two side frames constitute the vertices of the square frame, a first slide groove 4 from top to bottom is provided on the outer side of the two pillars of the same side frame, a second slide groove 5 from top to bottom is provided on the outer side of the two pillars on the same side of the different side frames, and a support plate 9 for supporting the side wall of the pipeline foundation pit is inserted into the first slide groove 4 and the second slide groove 5.

[0030] The horizontal line connecting the two pillars 2 of one frame is parallel to the horizontal line connecting the two pillars 2 of the other frame. The cross section of the pillar 2 is square, including two inner side surfaces and two outer side surfaces. The two side surfaces connected with the supporting cross bar 3 and the telescopic connecting rod 1 are respectively the first inner side surface 201 and the second inner side surface 202. The first outer side surface 203 is opposite to the first inner side surface 201, and the second outer side surface 204 is opposite to the second inner side surface 202. The first chute 4 and the second chute 5 are formed by connecting an L-shaped plate 401 (for example, an L-shaped steel plate) vertically by two plates. A plate (side plate) of the support 2 (for example, a plate formed by connecting two plates vertically) is fixed to (for example, welded to) the first outer side surface and a gap is left between the second outer side surface of the support 2 and another plate (transverse plate) of the L-shaped plate 401, wherein the first slide groove 4 is formed by the gap between the second outer side surfaces of the two support 2 of the same plane frame and another plate (transverse plate) of the L-shaped plate, and the second slide groove 5 is formed by the gap between a plate (side plate) of the L-shaped plate (for example, an L-shaped steel plate, formed by connecting two plates vertically) fixed to the first outer side surface of the support 2 and the telescopic connecting rod 1. The height of the support 2 is consistent with or greater than the depth of the pipeline foundation pit. The support 2 can be, for example, a square channel steel, the cross-sectional size of the square channel steel is not less than 100×50mm, preferably about 100×50mm, the wall thickness is not less than 3.5mm, preferably about 3.5mm, and the height is not less than 2m, preferably about 2-4m.

[0031] The support cross bar 3 is preferably vertically connected to the first inner side surface 201 of the pillar 2, so that the support cross bar 3 is in a horizontal state. The support cross bar 3 is preferably more than two, for example, two, three or four. The multiple support cross bars 3 are parallel to each other and are arranged at different heights of the pillar 2. The distance between adjacent support cross bars 3 can be, for example, 1 / 6-1 / 2 of the length or height of the pillar 2, preferably 1 / 4-1 / 2. The support cross bar 3 and the pillar 2 are connected by welding, for example. The length of the support cross bar 3 is adapted to the width or length of the pipeline foundation pit, for example, slightly smaller than the width or length of the pipeline foundation pit. The support cross bar 3 can be, for example, a Φ57 circular steel pipe with a length of not less than 2m, preferably about 2m, and can also be customized according to common foundation pit sizes in the project.

[0032] The L-shaped plate 401 includes a vertically connected transverse plate 4011 and a side plate 4012, wherein the transverse plate 4011 is parallel to the second outer side surface 204, and the distance between the transverse plate 4011 and the second outer side surface 204 can be, for example, 8-15 mm, preferably about 10 mm, and the L-shaped plate 401 can be, for example, an angle steel with a thickness of not less than 3 mm, preferably about 3 mm. Usually, the length of the first slide groove 4 is consistent with the height of the pillar 2.

[0033] The two ends of the telescopic connecting rod 1 are respectively vertically connected to the same-side pillars 2 of the two-sided skeleton. The telescopic connecting rod 1 includes an externally threaded rod 100 and an internally threaded sleeve 101 threadedly connected to the externally threaded rod 100. One end of the externally threaded rod 100 is connected to the pillar 2 of one of the side skeletons, and the other end is threadedly connected to the internally threaded sleeve 101. The end of the internally threaded sleeve 101 away from the externally threaded rod 100 is connected to the pillar 2 of the other side skeleton.

[0034] A first through hole is formed at one end of the externally threaded rod 100 connected to the pillar 2 of one side of the skeleton, a second through hole is formed at one end of the internally threaded sleeve 101 away from the externally threaded rod 100, a plurality of short sleeves 6 arranged along the length direction of the second internal side surface 202 are fixed on the second inner side surface 202, the short sleeves 6 serve as sockets for the externally threaded rod 100 and the internally threaded sleeve 101, at least two short sleeves 6 (usually the sum of the externally threaded rod 100 and the internally threaded sleeve 101) are provided on each pillar 2, the short sleeves 6 can be, for example, short tubes of Φ48, the length can be, for example, 0.1-0.5m, preferably about 0.3m, a third through hole is formed on the short sleeve for socketing the externally threaded rod 100, a fourth through hole is formed on the short sleeve for socketing the internally threaded sleeve 101, the distance between the third through hole and the pillar is generally equal to the distance between the first through hole and the end of the externally threaded rod 100 (the end away from the external thread), the distance between the fourth through hole and the pillar is generally equal to the distance between the second through hole and The distance between the end of the internal threaded sleeve 101 (the end away from the internal thread), the first through hole, the second through hole, the third through hole and the fourth through hole can be, for example, M20 bolt holes. First, one end of the multiple telescopic connecting rods 1 is inserted into the short sleeve 6 of one side of the skeleton in turn, and then the other end of the telescopic connecting rod 1 is inserted into the short sleeve 6 of the other side of the skeleton. The length of the external threaded rod 100 screwed into the internal threaded sleeve 101 is adjusted so that the distance between the two sides of the skeleton is close to the length or width of the pipeline foundation pit. The first through hole and the third through hole overlap and insert a bolt 7 (for example, an M16 hexagonal head long bolt) and then tighten it with a matching nut 8 to achieve the connection of the two sides of the skeleton and combine it into a frame structure. The second through hole and the fourth through hole overlap and insert a bolt and then tighten it with a matching nut. When the first through hole and the third through hole or the second through hole and the fourth through hole do not overlap, the insertion distance of the external threaded rod 100 and the internal threaded sleeve 101 in the socket is adjusted to make them overlap. This arrangement makes transportation, installation and disassembly convenient, and the structural dimensions can also be adjusted according to on-site conditions to ensure construction safety.

[0035] Support plates 9 are inserted into the two first chutes and one of the second chutes respectively. One of the chutes is not inserted with the support plate 9 and is used as a passage for construction workers to enter or exit, or a passage for escape in an emergency. The support plate 9 supports the side wall of the pipeline foundation pit to prevent the side wall from collapsing. The support plate 9 can be, for example, a composite plate with a thickness of 9 mm or a steel plate with a thickness of 3-5 mm. Generally, the height of the support plate 9 is consistent with the height of the pillar 2, and the width is consistent with the length of the support cross bar 3 and / or the telescopic connecting rod 1.

[0036] An LED warning light 10 is fixed on the top of the support 2 .

[0037] During construction, the welded one-side skeleton is placed in the foundation pit and against one side of the foundation pit, one end of the multiple telescopic connecting rods 1 is inserted into the short sleeve 6 of one of the one-side skeletons in turn, and then the other end of the telescopic connecting rod 1 is inserted into the short sleeve 6 of the other-side skeleton, and the other-side skeleton is against or close to the side of the foundation pit opposite to the above-mentioned side. The length of the external threaded rod 100 screwed into the internal threaded sleeve 101 is adjusted so that the distance between the two-side skeletons is close to the length or width of the pipeline foundation pit. The first through hole and the third through hole overlap and insert the bolt 7 (for example, it can be an M16 hexagonal head long bolt) and then tighten it with the matching nut 8 to achieve the connection of the two-side skeletons and combine them into a frame structure. The second through hole and the fourth through hole overlap and insert the bolt and then tighten it with the matching nut. When the first through hole and the third through hole or the second through hole and the fourth through hole do not overlap, the insertion distance of the external threaded rod 100 and the internal threaded sleeve 101 in the socket is adjusted to make them overlap.

[0038] The above describes the preferred embodiments of the present invention, however, the above description is not intended to be limiting. A person skilled in the art may make many changes or modifications to the present invention without departing from the spirit and scope of the present invention. The changes or modifications should be included in the scope of the appended claims.

Claims

1. A telescopic pipeline foundation pit support device, characterized in that: The whole structure is a frame structure, which is used to be placed in a pipeline foundation pit, and comprises two side frames arranged opposite to each other and a telescopic connecting rod (1) connected between the frames for adjusting the distance between the two side frames, each side frame comprises two pillars (2) arranged at intervals, and a supporting crossbar (3) connecting the two pillars (2), the telescopic connecting rod (1) is connected between two corresponding pillars (2) of the two side frames, the telescopic connecting rod (1) and the supporting crossbar (3) form a square frame with a closed loop cross section, wherein the four pillars of the two side frames form the vertices of the square frame, a first slide groove (4) from top to bottom is provided on the outer side of two pillars of the same side frame, and a second slide groove (5) from top to bottom is provided on the outer side of two pillars on the same side of different side frames, and a supporting plate (9) for supporting the side wall of the pipeline foundation pit is inserted into the first slide groove (4) and the second slide groove (5).

2. The telescopic pipeline foundation pit supporting device according to claim 1 is characterized in that: The cross section of the support (2) is square, comprising two inner side surfaces and two outer side surfaces, the two side surfaces connected to the supporting cross bar (3) and the telescopic connecting rod (1) are respectively a first inner side surface (201) and a second inner side surface (202), the first outer side surface (203) is opposite to the first inner side surface (201), and the second outer side surface (204) is opposite to the second inner side surface (202), the first slide groove (4) and the second slide groove (5) are formed by fixing one plate of the L-shaped plate (401) to the first outer side surface and leaving a gap between the second outer side surface of the support (2) and another plate of the L-shaped plate (401), wherein the first slide groove (4) is formed by the gap between the second outer side surfaces of two support columns (2) of the same plane frame and another plate of the L-shaped plate, and the second slide groove (5) is formed by the gap between one plate of the L-shaped plate fixed to the first outer side surface of the support (2) and the telescopic connecting rod (1).

3. The telescopic pipeline foundation pit supporting device according to claim 2 is characterized in that: Pillar 2 is a square channel steel with a cross-sectional size of not less than 100×50 mm, a wall thickness of not less than 3.5 mm, and a height of not less than 2 m.

4. The telescopic pipeline foundation pit supporting device according to claim 2 is characterized in that: The support crossbar (3) is vertically connected to the first inner side surface (201) of the pillar (2). There are at least two support crossbars (3), and the distance between adjacent support crossbars (3) is 1 / 6 to 1 / 2 of the height of the pillar (2).

5. The telescopic pipeline foundation pit supporting device according to claim 2, characterized in that: The L-shaped plate (401) comprises a transverse plate (4011) and a side plate (4012) which are vertically connected, wherein the transverse plate (4011) is parallel to the second outer side surface (204), and the distance between the transverse plate (4011) and the second outer side surface (204) is 8-15 mm.

6. The telescopic pipeline foundation pit supporting device according to claim 5, characterized in that: The L-shaped plate (401) is an angle steel with a thickness of not less than 3 mm.

7. The telescopic pipe foundation pit supporting device according to any one of claims 1 to 6, characterized in that: The two ends of the telescopic connecting rod (1) are respectively vertically connected to the pillars (2) of the two-sided skeleton. The telescopic connecting rod (1) comprises an externally threaded rod (100) and an internally threaded sleeve (101) threadedly connected to the externally threaded rod (100). One end of the externally threaded rod (100) is connected to the pillar (2) of one of the side skeletons, and the other end is threadedly connected to the internally threaded sleeve (101). The end of the internally threaded sleeve (101) away from the externally threaded rod (100) is connected to the pillar (2) of the other side skeleton.

8. The telescopic pipeline foundation pit supporting device according to claim 7, characterized in that: A first through hole is formed at one end of the externally threaded rod (100) connected to a support column (2) of one side of the skeleton, a second through hole is formed at one end of the internally threaded sleeve (101) away from the externally threaded rod (100), a plurality of short sleeves (6) arranged along the length direction of the second internally threaded surface (202) are fixed on the second inner side surface (202), the short sleeves (6) serving as sockets for the externally threaded rod (100) and the internally threaded sleeve (101), at least two short sleeves (6) are provided on each support column (2), a third through hole is formed on the short sleeve for socketing the externally threaded rod (100), a fourth through hole is formed on the short sleeve for socketing the internally threaded sleeve (101), the first through hole and the third through hole are overlapped and a bolt (7) is inserted therein and then tightened using a matching nut (8), the second through hole and the fourth through hole are overlapped and a bolt (7) is inserted therein and then tightened using a matching nut (8), 9. The telescopic pipeline foundation pit supporting device according to claim 1, characterized in that: An LED warning light (10) is fixed to the top of the support (2).

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