CN111364523B

CN111364523B - Inspection well temporary sealing equipment for municipal infrastructure construction and using method

Info

Publication number: CN111364523B
Application number: CN202010229417.0A
Authority: CN
Inventors: 刘中雷
Original assignee: Shaoxing Misu Machinery Equipment Co ltd
Current assignee: Shenyang Concrete Construction Engineering Co ltd
Priority date: 2018-07-19
Filing date: 2018-07-19
Publication date: 2021-06-08
Anticipated expiration: 2038-07-19
Also published as: CN108824494A; CN108824494B; CN111364523A

Abstract

The invention discloses inspection well temporary sealing equipment for municipal infrastructure construction and a use method thereof, the inspection well temporary sealing equipment comprises an underground supporting device, the top of the underground supporting device is provided with a butt joint device, the top of the butt joint device is butt-jointed with a sealing top cover, the inspection well temporary sealing equipment for municipal infrastructure construction is used for preventing falling of an inspection well close to an inspection well opening in a temporary inspection well opening sealing mode, on one hand, the opening and sealing operation can be guaranteed in a construction time period, normal construction cannot be influenced, on the other hand, the condition that pedestrians or vehicles fall off the inspection well can be avoided, the sealing top cover mainly has the function of sealing the inspection well without a cover, on the one hand, temporary sealing can be carried out in the construction of the opening inspection well, road unsmooth performance can be avoided, on the other hand, the sealing top cover can be guaranteed to be flush with a road surface in the installation, and the pedestrian or vehicle tires can be prevented from falling under the condition that road The accident occurs.

Description

Inspection well temporary sealing equipment for municipal infrastructure construction and using method

The invention relates to a divisional application of inspection well temporary sealing equipment for municipal infrastructure construction, which is invented on 2018, 07, 19 and CN 201810797935.5.

Technical Field

The invention relates to the technical field of municipal infrastructure construction, in particular to inspection well temporary sealing equipment for municipal infrastructure construction and a using method thereof.

Background

The inspection shaft, in the construction process of city planning and city, the period is mainly being built at each drainage pipe's turning and reposition of redundant personnel department, goes the primary importance and is for carrying out the maintenance operation in the time of conveniently later stage input use, now, along with the constantly propulsion of urbanization, the inspection shaft not only need use the inspection shaft in order to excrete city rainwater, also when carrying out underground line and laying, makes things convenient for the maintenance of circuit, lays and later stage is changed.

The inspection well, namely, a pit is excavated from the ground surface and communicated with an underground passage, when the inspection well is put into use, in order to not interfere with the daily life and road quality of residents, an inspection well cover is arranged at an opening of the inspection well and is positioned on the same horizontal plane with the ground surface, although the opening of the inspection well cover does not interfere with the daily life, when a line is laid again, a sewer is dredged or the line is overhauled, due to the material problem of the inspection well cover, the repeated opening and closing actions cannot be carried out continuously, the opening of the inspection well is usually carried out until the work is finished, the inspection well is in an open state completely, warning signs are usually placed around the inspection well to remind passers in the actual operation, the condition that the inspection well cover is stolen exists in life, a period of time is usually required for carrying out the inspection well cover matching and sealing treatment after the inspection well is opened, and the inspection well is in, when the inspection shaft is in an open state, pedestrians or vehicles walking on the road are dangerous, and especially when the inspection shaft is dark at night, the pedestrians are likely to fall into the inspection shaft to cause danger.

If Chinese patent discloses "inspection shaft anti-falling device" (patent number: CN105464138A), including preventing weighing down the frame in this patent, prevent weighing down to be equipped with the erection column on the frame and adjust the seat of the adjustment of erection column position, prevent weighing down the frame and install in the inspection shaft through the erection column, above-mentioned technical scheme is when the inspection shaft lid is lost, the spring has lost the suppression of inspection shaft lid and upwards bounces, makes warning ring expose subaerial, can remind pedestrian's inspection shaft lid to lose, nevertheless still has some not enoughly: each inspection shaft all need install above-mentioned device, has built the cost on the one hand, on the other hand because suffer rainwater erosion for a long time, takes place the corrosion just can not in time pop out when the spring is in the extrusion state, can not play anticipated effect, above-mentioned technical scheme is only single simultaneously reminds pedestrian's function can not effectually avoid the condition of falling to take place, when keeping in repair and dredging the inspection shaft or laying the circuit, this side can cause the construction inconvenient.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides inspection well temporary sealing equipment for municipal infrastructure construction, which solves the problem that pedestrians and sundries are easy to fall off when the inspection well is in an open state.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a municipal infrastructure is built with inspection shaft tentatively sealing equipment, includes strutting arrangement in the pit, strutting arrangement's in the pit top is provided with interfacing apparatus, interfacing apparatus's top butt joint is installed and is sealed the top cap.

Preferably, the underground supporting device comprises a mounting support, mounting rings are movably sleeved on the front and the back of the two sides of the outer side of the mounting support, wall grabbing support legs are arranged at the bottom of the outer side of the mounting rings, and tightening cross bars are arranged on the opposite sides of the wall grabbing support legs.

Preferably, it is hollow stabilizer blade to grab the wall stabilizer blade, it is provided with directional track to grab the middle part of the relative one side of wall stabilizer blade, directional orbital inner chamber activity joint has the lift ball, the lift ball is kept away from directional orbital one side and is tightened horizontal bar fixed connection, the middle part through connection at tight horizontal bar top has the lift regulating spindle, the outside at installing support and extending to installing support top is run through at the top of lift regulating spindle, the top fixed mounting of lift regulating spindle has the regulation carousel, grab the bottom equidistance fixedly connected with erection bolt of the wall stabilizer blade one side of carrying on the back mutually, the outside of erection bolt is provided with powerful spring, one side fixedly connected with that grabs the wall stabilizer blade is kept away from to powerful spring grabs the wallboard, it has the taper pin to grab one side equidistance fixed welding that the wallboard kept away from powerful spring.

Preferably, the butt joint device includes the butt joint case, the butt joint fixed orifices has all been seted up with the back in the front at butt joint case top, the fixed welding in bottom of butt joint fixed orifices inner wall has the butt joint post, the butt joint spring has been cup jointed in the outside of butt joint post, the fixed welding in top of butt joint spring has the butt joint roof, the top setting of butt joint roof installs powerful magnetic sheet, the positive top with the back of butt joint case all sets up installs diverting pulley.

Preferably, the front and the back of the two sides of the bottom of the sealing top cover are fixedly connected with the adsorption magnetic sheets, reinforcing holes are formed in the middle of the two sides of the sealing top cover, hidden grooves are formed in the two sides of the middle of the top of the sealing top cover, one side, away from the center, of each hidden groove is communicated with the reinforcing holes, and an installing mechanism is arranged at the top of the sealing top cover.

Preferably, installation mechanism includes vertical strip, the bottom of vertical strip runs through and seals the top cap and extend to the inner chamber in latent groove, the positive bottom through connection of vertical strip has the atress to tie, the back of atress tie run through vertical strip and with the inner wall fixed connection in latent groove, the back activity in the atress tie outside has cup jointed the mounting bar, one side that the atress was tied was kept away from to the mounting bar runs through the reinforcement hole and extends to the inner chamber in reinforcement hole, compensation spring has been cup jointed in the outside of mounting bar, the outside fixed connection of one side and the mounting bar that compensation spring is relative, one side threaded connection that compensation spring was kept away from to the mounting bar has the anchor strut, one side fixed weld that the anchor strut kept away from and seals the top cap has the installation curb plate.

Preferably, the butt joint box is welded by a two-section type box body, the butt joint fixing hole is an I-shaped hole, and the diameters of the butt joint top plate and the powerful magnetic sheet are equal to the diameter of the inner side of the butt joint fixing hole.

Preferably, the installation curb plate is the arc, the diameter of installation curb plate equals with the outside diameter of sealing the top cap, compensation spring one side in opposite directions all the overlap joint on the inner wall of reinforcement hole.

(III) advantageous effects

The invention provides inspection well temporary sealing equipment for municipal infrastructure construction. The method has the following beneficial effects:

(1) this municipal infrastructure is built and is used inspection shaft tentatively sealing equipment adopts the mode of sealing the inspection shaft mouth temporarily to come to lean on the protection work that prevents falling of a mouthful inspection shaft, can guarantee on the one hand to carry out the opening in construction period and seal the operation and reach the purpose that does not influence normal construction, and on the other hand can carry out the effect of secondary protection to the opening inspection shaft, avoids pedestrian or vehicle to drop the condition emergence of inspection shaft, has guaranteed the security of the lives and property.

(2) This municipal infrastructure is built and is used inspection shaft temporality sealing equipment, the main effect that seals the top cap lies in carrying out the processing of sealing to the inspection shaft of no lid, can seal temporarily in the construction of opening inspection shaft on the one hand and avoid causing the road not smooth, on the other hand can guarantee in the installation with the road surface parallel and level can also prevent pedestrian or vehicle tire and drop wherein to cause the occurence of failure under the condition that does not influence road traffic.

(3) This municipal infrastructure is built and is used inspection shaft tentatively sealing equipment, strutting arrangement's in the pit main action lies in for sealing the top cap and provide certain holding power, guarantees that interim closing arrangement can bear the pressure of certain within range and indeformable and do not fall, and strutting arrangement adopts the design of grabbing the wall formula in the pit to increase frictional force between the two and keep the stability when can adapt to the inspection shaft inner wall in addition.

(4) This municipal infrastructure is built and is used inspection shaft temporary sealing equipment, the design main role of supporting device and the mutually independent disconnect-type of closing cap in the pit lie in the inspection shaft open in order can carry out the installation of strutting device in the pit and not influence normal construction operation, simultaneously can be very convenient carry out the operation of temporarily sealing when not working at night.

(5) This municipal infrastructure is built and is used inspection shaft tentatively sealing equipment, interfacing apparatus's main function lies in the location and seals the top cap and avoid placing in the time have the deviation to lead to the use in unstable, and interfacing apparatus can also play the effect that the rounding turned to when carrying out the cable and laying simultaneously, avoids the outer layer of cable and ground to take place the condition that the friction is damaged and the right angle is folded and take place the fracture.

(6) This municipal infrastructure is built and is used inspection shaft temporary sealing equipment, installation mechanism's main effect lies in utilizing effort and reaction's effect extrusion inspection shaft inner wall to consolidate interim inspection shaft lid, can also act as when changing the form simultaneously and carry the installation of carrying the handle and carrying out the dismantlement of sealing the top cap.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the mounting bracket of the present invention;

FIG. 3 is a schematic diagram of a downhole support apparatus of the present invention;

FIG. 4 is a schematic structural diagram of the docking device of the present invention;

FIG. 5 is a schematic view of the installation mechanism of the present invention.

In the figure: 1 underground supporting device, 101 mounting bracket, 102 mounting ring, 103 wall-grasping supporting feet, 104 tightening cross bar, 105 orientation track, 106 lifting ball, 107 lifting adjusting shaft, 108 adjusting turntable, 109 mounting bolt, 110 strong spring, 111 wall-grasping plate, 112 conical nail, 2 butt-joint device, 201 butt-joint box, 202 butt-joint fixing hole, 203 butt-joint column, 204 butt-joint spring, 205 butt-joint top plate, 206 strong magnetic sheet, 207 steering pulley, 3 sealing top cover, 301 adsorption magnetic sheet, 302 reinforcing hole, 303 hidden groove, 304 mounting mechanism, 3041 vertical bar, 3042 stress bolt, 3043 mounting bar, 3044 compensation spring, 3045 reinforcing bar and 3046 mounting side plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a municipal infrastructure is built with inspection shaft tentatively sealing equipment, including strutting arrangement 1 in the pit, strutting arrangement 1 in the pit includes installing support 101, installing ring 102 has been cup jointed with the equal activity in the back in the front of installing support 101 outside both sides, the bottom in the installing ring 102 outside is provided with grabs wall stabilizer blade 103, it is provided with the horizontal bar 104 that tightens to grab one side that wall stabilizer blade 103 is relative, strutting arrangement 1's top in the pit is provided with interfacing apparatus 2, the top butt joint of interfacing apparatus 2 is installed and is sealed top cap 3, seal the equal fixedly connected with in front and the back of top cap 3 bottom both sides and adsorb magnetic sheet 301, reinforcement hole 302 has all been seted up in the middle part of the both sides of sealing top cap 3, hidden groove 303 has all been seted up to the both sides at the top middle part of sealing top cap 3, the one side that hidden groove 303.

Grab wall stabilizer blade 103 and be hollow stabilizer blade, the middle part of grabbing the relative one side of wall stabilizer blade 103 is provided with directional track 105, the movable joint of inner chamber of directional track 105 has lift ball 106, lift ball 106 keeps away from one side of directional track 105 and tightens horizontal bar 104 fixed connection, the middle part through connection at the horizontal bar 104 top of tightening has lift adjustment shaft 107, the outside at installing support 101 and extension to installing support 101 top is run through at the top of lift adjustment shaft 107, the top fixed mounting of lift adjustment shaft 107 has regulation carousel 108, grab the equidistant fixedly connected with erection bolt 109 in bottom of the opposite side of wall stabilizer blade 103, the outside of erection bolt 109 is provided with powerful spring 110, one side fixedly connected with of grabbing wall stabilizer blade 103 is kept away from to powerful spring 110 grabs wallboard 111, grab wallboard 111 keeps away from one side equidistant fixed welding of powerful spring 110 and have conical nail 112.

Docking assembly 2 includes butt joint case 201, butt joint case 201 is two segmentation box welding, butt joint fixed orifices 202 is worker shape hole, the diameter of butt joint roof 205 and powerful magnetic sheet 206 all equals with the inboard diameter of butt joint fixed orifices 202, butt joint fixed orifices 202 have all been seted up with the back to the front at butt joint case 201 top, the fixed welding in bottom of butt joint fixed orifices 202 inner wall has butt joint post 203, butt joint spring 204 has been cup jointed in the outside of butt joint post 203, butt joint roof 205 is fixed to the top of butt joint spring 204 welding, powerful magnetic sheet 206 is installed in the top setting of butt joint roof 205, butt joint case 201 all sets up with the top at the back and installs diverting pulley 207.

The mounting mechanism 304 includes a vertical bar 3041, the bottom of the vertical bar 3041 penetrates through the sealing top cover 3 and extends to the inner cavity of the hidden groove 303, the bottom of the front side of the vertical bar 3041 penetrates through a force-bearing bolt 3042, the back of the force-bearing bolt 3042 penetrates through the vertical bar 3041 and is fixedly connected with the inner wall of the hidden groove 303, the back of the outer side of the force-bearing bolt 3042 is movably sleeved with a mounting bar 3043, one side of the mounting bar 3043 away from the force-bearing bolt 3042 penetrates through the reinforcing hole 302 and extends to the inner cavity of the reinforcing hole 302, the outer side of the mounting bar 3043 is sleeved with a compensating spring 3044, the opposite side of the compensating spring 3044 is fixedly connected with the outer side of the mounting bar 3043, one side of the mounting bar 3043 away from the compensating spring 3044 is in threaded connection with a reinforcing rod 3045, one side of the reinforcing rod 3046 away from the sealing top cover 3 is fixedly welded with a mounting side plate 3046, the mounting side plate 3046 is an arc-shaped plate.

The working principle is as follows: firstly, an underground supporting device 1 is placed in an inner cavity of an inspection well mouth, an adjusting turntable 108 is rotated by one hand after the underground supporting device 1 is placed to a proper depth, the adjusting turntable 108 drives a lifting adjusting shaft 107 to rotate, the lifting adjusting shaft 107 rotates to drive a tightening cross bar 104 to move upwards, the tightening cross bar 104 moves upwards to drive a lifting ball 106 to move upwards continuously along the inner cavity of a directional track 105, an included angle between two wall grabbing support legs 103 is gradually increased when the tightening cross bar 104 moves upwards, so that the two wall grabbing support legs 103 are not closed to the inner wall of the inspection well, when the wall grabbing support legs 103 are opened, the wall grabbing plate 111 is driven to close to the inner wall of the inspection well until the wall grabbing plate 111 drives a conical nail 112 to contact with the inner wall of the inspection well, the tightening cross bar 104 continues to be adjusted upwards, the bottom of the wall grabbing plate 111 firstly contacts the inner wall of the inspection well and extrudes a strong spring 110 to generate deformation, and the bottom of the wall grabbing plate 111 is extruded to close to the wall grabbing support legs 103 to drive the top of the wall grabbing Positioning and fixing the gap of the inner wall, installing and fixing the left side of the underground supporting device 1 and the inner wall of the inspection well in the same operation steps, then placing the sealing top cover 3 on the whole equipment, aligning the magnetic adsorption sheet at the bottom of the sealing top cover 3 to the butt-joint fixing hole 202 at the top of the butt-joint box 201 and attracting the strong magnetic sheet 206 with each other when placing, finally directly pulling the vertical bar 3041, rotating the vertical bar 3041 around the stress bolt 3042 to enable the vertical bar 3041 to extrude the mounting bar 3043, enabling the mounting bar 3043 to push the reinforcing rod 3045 to move outwards under the action of pressure, enabling the reinforcing rod 3045 to drive the mounting side plates 3046 to move towards the inner wall of the inspection well and contact with the inner wall of the inspection well for extrusion and fixation, enabling the mounting side plates 3046 at the two sides to pressurize to enable the sealing top cover 3 to be more stable, meanwhile, when a pedestrian or vehicle tire passes by, the underground supporting device 1 can not be detached after the construction is finished, meanwhile, when the cable is laid, one side of the cable can be pulled into the inspection well through the steering pulley 207 to be laid.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a municipal infrastructure is built with inspection shaft temporary sealing equipment, includes strutting arrangement (1) in the pit, its characterized in that: the top of the underground supporting device (1) is provided with a butt joint device (2), and the top of the butt joint device (2) is provided with a sealing top cover (3) in a butt joint mode; the front and the back of two sides of the bottom of the sealing top cover (3) are fixedly connected with magnetic adsorption sheets (301), the middle parts of two sides of the sealing top cover (3) are respectively provided with a reinforcing hole (302), two sides of the middle part of the top of the sealing top cover (3) are respectively provided with a hidden groove (303), one side of the hidden groove (303) far away from the center is communicated with the reinforcing holes (302), and the top of the sealing top cover (3) is provided with an installation mechanism (304); the mounting mechanism (304) comprises a vertical bar (3041), the bottom of the vertical bar (3041) penetrates through the sealing top cover (3) and extends to the inner cavity of the hidden groove (303), the bottom of the front surface of the vertical bar (3041) is connected with a stressed bolt (3042) in a penetrating manner, the back surface of the stressed bolt (3042) penetrates through the vertical bar (3041) and is fixedly connected with the inner wall of the hidden groove (303), the back surface of the outer side of the stressed bolt (3042) is movably sleeved with a mounting bar (3043), one side of the mounting bar (3043) far away from the stressed bolt (3042) penetrates through the reinforcing hole (302) and extends to the inner cavity of the reinforcing hole (302), the outer side of the mounting bar (3043) is sleeved with a compensation spring (3044), the opposite side of the compensation spring (3044) is fixedly connected with the outer side of the mounting bar (3043) far away from the compensation spring (3044), and a screw thread is connected with a reinforcing rod (3045), a mounting side plate (3046) is fixedly welded on one side of the reinforcing rod (3045) far away from the sealing top cover (3);

the underground supporting device (1) comprises a mounting support (101), mounting rings (102) are movably sleeved on the front and back of the two sides of the outer side of the mounting support (101), wall grabbing support legs (103) are arranged at the bottom of the outer side of the mounting rings (102), and tightening cross bars (104) are arranged on one side, opposite to the wall grabbing support legs (103);

the wall grabbing support leg (103) is a hollow support leg, a directional track (105) is arranged in the middle of one side, opposite to the wall grabbing support leg (103), of the directional track (105), a lifting ball (106) is movably clamped in an inner cavity of the directional track (105), one side, far away from the directional track (105), of the lifting ball (106) is fixedly connected with a tightening cross bar (104), a lifting adjusting shaft (107) penetrates through the middle of the top of the tightening cross bar (104), the top of the lifting adjusting shaft (107) penetrates through the mounting support (101) and extends to the outer side of the top of the mounting support (101), an adjusting turntable (108) is fixedly mounted at the top of the lifting adjusting shaft (107), mounting bolts (109) are fixedly connected to the bottom of one side, back to the wall grabbing support leg (103), of the mounting bolts (109) are fixedly connected at equal intervals, a strong spring (110) is arranged on the outer side of the mounting bolts (109), and a wall grabbing plate (111, conical nails (112) are fixedly welded on one side of the wall grabbing plate (111) far away from the strong spring (110) at equal intervals;

the butt joint device (2) comprises a butt joint box (201), wherein butt joint fixing holes (202) are formed in the front face and the back face of the top of the butt joint box (201), butt joint columns (203) are fixedly welded at the bottoms of the inner walls of the butt joint fixing holes (202), butt joint springs (204) are sleeved on the outer sides of the butt joint columns (203), a butt joint top plate (205) is fixedly welded at the top of the butt joint springs (204), strong magnetic sheets (206) are arranged at the top of the butt joint top plate (205), steering pulleys (207) are arranged at the front face and the back face of the butt joint box (201), the butt joint box (201) is welded in a two-section box body mode, the butt joint fixing holes (202) are I-shaped holes, the diameters of the butt joint top plate (205) and the strong magnetic sheets (206) are equal to the diameters of the inner sides of the butt joint fixing holes (202), and installation side plates (3046, the diameter of the mounting side plate (3046) is equal to the diameter of the outer side of the sealing top cover, and the opposite sides of the compensation springs (3044) are overlapped on the inner wall of the reinforcing hole (302).

2. The method of using the municipal infrastructure construction inspection well temporary sealing apparatus of claim 1, wherein the method comprises the steps of: when the device is used, firstly, the underground support device (1) is placed in an inner cavity of an inspection well mouth, the adjusting turntable (108) is rotated by one hand after the device is placed to a proper depth, the adjusting turntable (108) drives the lifting adjusting shaft (107) to rotate, the lifting adjusting shaft (107) rotates to drive the tightening cross bar (104) to move upwards, the tightening cross bar (104) moves upwards to drive the lifting ball (106) to move upwards continuously along the inner cavity of the directional track (105), an included angle between the two wall grabbing support legs (103) is gradually increased when the tightening cross bar (104) moves upwards, so that the two wall grabbing support legs (103) are continuously closed to the inner wall of the inspection well, the wall grabbing plate (111) is driven to close to the inner wall of the inspection well when the wall grabbing plate (103) is opened until the wall grabbing plate (111) drives the conical nail (112) to be in contact with the inner wall of the inspection well, the tightening cross bar (104) is continuously adjusted upwards, the bottom of the wall grabbing plate (111) firstly contacts with the inner wall of the inspection, the bottom of the wall grabbing plate (111) is squeezed to be close to the wall grabbing support leg (103) to drive the top of the wall grabbing plate (111) to gradually contact with the inner wall of the inspection well until the conical nail (112) is penetrated into a gap of the inner wall of the inspection well for positioning and fixing, the left side of the underground supporting device (1) is fixedly installed on the inner wall of the inspection well in the same operation step, then the sealing top cover (3) is placed on the whole device, the adsorption magnetic sheet at the bottom of the sealing top cover (3) is aligned to the butt joint fixing hole (202) at the top of the butt joint box (201) and mutually attracted with the strong magnetic sheet (206), finally the vertical bar (3041) is directly pulled, the vertical bar (3041) rotates around the stress bolt (3042) to enable the vertical bar (3041) to squeeze the installation bar (3043), the installation bar (3043) pushes the reinforcing bar (3045) to move outwards under the pressure, the reinforcing bar (3045) drives the installation bar (3046) to move towards the inner wall of the inspection well, the installation curb plate (3046) pressurization of both sides makes sealing top cap (3) installation more firm, and the construction is unfinished simultaneously, also can not cause to drop and sink into the inspection shaft when having the tire of pedestrian or vehicle to pass by, and strutting arrangement (1) does not dismantle after the construction is accomplished simultaneously, when carrying out cable laying, draws one side of cable to get into and lay in the inspection shaft through diverting pulley (207).