Assembly type inspection well

Abstract

The utility model belongs to the field of municipal engineering, and provides an assembly type inspection well which comprises a lower well chamber, an upper well chamber and an upper well chamber. The upper well chamber is arranged at the top end of the lower well chamber, and a first positioning hole is formed in the side wall of the upper well chamber in an up-down penetrating mode; the bottom end of the first positioning steel bar penetrates through the first positioning hole and extends into the first preformed hole, and cement mortar is filled between the first positioning hole and the first positioning steel bar and between the first preformed hole and the first positioning steel bar; and the well chamber closing-up top plate covers an opening in the top end of the upper well chamber. According to the assembly type inspection well, the upper well chamber and the well chamber closing-up top plate can be prefabricated in a factory-like mode, after the upper well chamber and the lower well chamber are assembled, the first positioning steel bars penetrate through the first positioning holes and are inserted into the first preformed holes, then grouting is conducted, the upper well chamber and the lower well chamber can be stably connected, construction in a pipe jacking well is convenient and fast, and the construction efficiency is improved. A plurality of problems faced by a cast-in-place ultra-deep inspection well can be effectively solved, and the method becomes an inevitable trend of development of an inspection well construction technology.

Description

TECHNICAL FIELD

[0001] The utility model belongs to municipal works field, concretely relates to a kind of assembled inspection well. BACKGROUND

[0002] In the construction of deep sewage pipe network, pipe jacking technology is generally used. When the pipe jacking well is constructed, an inspection well usually needs to be built. The buried depth of this type of inspection well is usually large. The traditional cast-in-place concrete inspection well has many disadvantages. Its construction process is complex, including formwork erection, steel bar binding, concrete pouring and curing, etc., which greatly prolongs the construction period and is not conducive to the rapid progress of the project. Moreover, the construction quality is significantly affected by human and environmental factors. Cracks, honeycomb and other quality problems may occur in the concrete, which damages the structural strength and sealing performance of the inspection well and affects the operational stability of the underground pipe system.

[0003] For such super-deep inspection wells, the deep foundation pit environment can cause many problems. The deep foundation pit support and groundwater control are difficult. In concrete construction, material vertical transportation, bottom vibration and prevention of formwork floating are difficult to operate. Not only is the safety risk high, but also quality defects are easily caused. At the same time, super-deep inspection wells are faced with high water pressure and large earth pressure. The long-term stability of the cast-in-place well wall is poor. If there is local damage in the later period, due to the overall structural characteristics, the maintenance difficulty is extremely great, and the cost is extremely high. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides an assembled inspection well to solve the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: an assembled inspection well, comprising:

[0006] a lower well chamber, having a first reserved hole at the top end;

[0007] an upper well chamber, disposed at the top end of the lower well chamber, the upper well chamber being in communication with the lower well chamber, and a first positioning hole being provided through the side wall of the upper well chamber from top to bottom;

[0008] a first positioning steel bar, having a bottom end extending into the first reserved hole through the first positioning hole, and cement mortar being filled between the first positioning hole and the first positioning steel bar and between the first reserved hole and the first positioning steel bar;

[0009] a well chamber closing top plate, covering the opening at the top end of the upper well chamber.

[0010] Preferably, the top end of the lower well chamber is uniformly spaced circumferentially with three first reserved holes, and the side wall of the upper well chamber is provided with three first positioning holes, and the three first positioning holes correspond one-to-one to the three first reserved holes.

[0011] Preferably, the lower well chamber is an outer square and inner circle structure.

[0012] Preferably, the upper well chamber is provided with a maintenance platform.

[0013] Preferably, the maintenance platform is a hollow structure, and the maintenance platform is provided with a guardrail.

[0014] Preferably, the maintenance platform is provided with a manhole, and the manhole is provided with a cover plate.

[0015] Preferably, the second positioning steel bar is further included.

[0016] The well chamber closing top plate has an inlet, the inlet is provided with an adjusting ring, the top end of the well chamber closing top plate is provided with a second reserved hole, the upper and lower sides of the side wall of the adjusting ring are provided with second positioning holes, the bottom end of the second positioning steel bar penetrates through the second positioning holes and extends into the second reserved hole, and the second positioning holes and the second positioning steel bar and the second reserved hole and the second positioning steel bar are filled with cement mortar.

[0017] Preferably, the top end of the adjusting ring is provided with a support, the support is provided with a mounting hole corresponding to the second positioning hole, the top end of the second positioning steel bar penetrates through the mounting hole and extends above the support, and the top end of the second positioning steel bar is bent.

[0018] Preferably, the top end of the well chamber closing top plate is uniformly and circularly spaced apart and provided with two second reserved holes, the side wall of the adjusting ring is provided with two second positioning holes, and the two second positioning holes correspond to the two second reserved holes one by one.

[0019] Preferably, the adjusting ring is provided with a falling prevention net.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] The prefabricated inspection well provided by the utility model comprises a lower well chamber, an upper well chamber, a first positioning steel bar, a first positioning hole, a first reserved hole, a well chamber closing top plate, a second positioning steel bar, a second positioning hole, an adjusting ring, a second reserved hole and a falling prevention net. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The utility model provides a kind of prefabricated inspection well of section schematic view for embodiment of the utility model;

[0023] Figure 2 A cross section schematic view of a connecting part of an upper well chamber and a lower well chamber of an assembled inspection well is provided for the embodiment of the utility model;

[0024] Figure 3 A cross section schematic view of a connecting part of an upper well chamber and a well chamber closing-in roof of an assembled inspection well is provided for the embodiment of the utility model;

[0025] Figure 4 A top view structural schematic view of an upper well chamber of an assembled inspection well is provided for the embodiment of the utility model;

[0026] Figure 5 A cross section schematic view of an adjusting ring and its related part of an assembled inspection well is provided for the embodiment of the utility model;

[0027] Figure 6 A cross section schematic view of a connecting part of an adjusting ring and a support of an assembled inspection well is provided for the embodiment of the utility model;

[0028] Figure 7 A front view structural schematic view of a falling prevention net and its related part of an assembled inspection well is provided for the embodiment of the utility model;

[0029] Figure 8 A cross section schematic view of a lower well chamber and its related part of an assembled inspection well is provided for the embodiment of the utility model;

[0030] Figure 9 A top view structural schematic view of an upper well chamber unit of an assembled inspection well is provided for the embodiment of the utility model;

[0031] Figure 10 A cross section schematic view of an upper well chamber unit of an assembled inspection well is provided for the embodiment of the utility model;

[0032] Figure 11 A cross section schematic view of a connecting part of adjacent upper well chamber units of an assembled inspection well is provided for the embodiment of the utility model.

[0033] In the drawings, the components represented by each reference numeral are listed as follows:

[0034] 1, lower well chamber; 2, upper well chamber; 3, first positioning steel bar; 4, first reserved hole; 5, first positioning hole; 6, well chamber closing-in roof; 7, maintenance platform; 8, adjusting ring; 9, second reserved hole; 10, second positioning hole; 11, second positioning steel bar; 12, support; 13, mounting hole; 14, falling prevention net; 15, cover plate; 16, sealing ring; 17, water swelling water stop; 18, hook; 19, upper well chamber unit. DETAILED DESCRIPTION

[0035] The utility model will be further explained in detail in combination with specific embodiments, so that the person skilled in the art can more clearly understand the utility model.

[0036] It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or it can be detachable connection, or it can be one-piece structure. For ordinary skilled in the art, the specific meaning of such terms in this patent can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] The embodiment provides an assembled inspection well, which comprises:

[0039] The lower well chamber 1 is provided with a first reserved hole 4 at the top end.

[0040] For example, see Figures 1-2 The lower well chamber 1 is provided with a first reserved hole 4 at the top end.

[0041] The upper well chamber 2 is arranged at the top end of the lower well chamber 1, and the upper well chamber 2 is communicated with the lower well chamber 1, and the first positioning hole 5 is vertically arranged on the side wall of the upper well chamber 2.

[0042] For example, see Figures 1-2 The upper well chamber 2 is connected with the lower well chamber 1 through the socket joint, and a cement mortar layer is arranged between the upper well chamber 2 and the lower well chamber 1, the cement mortar layer is provided with a sealing ring 16 and a water-swelling waterstop 17, so that the sealing performance is good, the deformation adaptability is strong, and the installation is convenient. The first positioning hole 5 is vertically arranged on the side wall of the upper well chamber 2, and the first positioning hole 5 is aligned with the first reserved hole 4.

[0043] The first positioning steel bar 3 is vertically arranged, the first positioning steel bar 3 is located in the first positioning hole 5, and the top end of the first positioning steel bar 3 is flush with the top end of the first positioning hole 5, and the bottom end of the first positioning steel bar 3 extends to the bottom of the first reserved hole 4. The gap between the first positioning steel bar 3 and the first reserved hole 4 is filled with cement mortar, and the gap between the first positioning steel bar 3 and the first positioning hole 5 is also filled with cement mortar, and the cement mortar can improve the connection stability of the first positioning steel bar 3, the upper well chamber 2 and the lower well chamber 1.

[0044] For example, see Figures 1-2 The first positioning steel bar 3 is vertically arranged, the first positioning steel bar 3 is located in the first positioning hole 5, and the top end of the first positioning steel bar 3 is flush with the top end of the first positioning hole 5, and the bottom end of the first positioning steel bar 3 extends to the bottom of the first reserved hole 4. The gap between the first positioning steel bar 3 and the first reserved hole 4 is filled with cement mortar, and the gap between the first positioning steel bar 3 and the first positioning hole 5 is also filled with cement mortar, and the cement mortar can improve the connection stability of the first positioning steel bar 3, the upper well chamber 2 and the lower well chamber 1.

[0045] The well chamber closing top plate 6 is arranged at the top opening of the upper well chamber 2.

[0046] For example, referring to Figure 1 , Figure 3 , the top end of the upper shaft chamber 2 is provided with a socket, the bottom end of the shaft chamber closing top plate 6 is provided with a socket, and the upper shaft chamber 2 and the shaft chamber closing top plate 6 are connected through the socket and socket. And between the upper shaft chamber 2 and the shaft chamber closing top plate 6 is provided with a cement mortar layer, the cement mortar layer is provided with a sealing ring 16 and a water-swelling waterstop 17.

[0047] Based on the above structure, the assembled inspection well provided by the embodiment, wherein the upper shaft chamber 2 and the shaft chamber closing top plate 6 can be prefabricated in the factory, after the upper shaft chamber 2 and the lower shaft chamber 1 are assembled, the first positioning steel bar 3 is inserted into the first reserved hole 4 through the first positioning hole 5, then grouting is carried out, the upper shaft chamber 2 and the lower shaft chamber 1 can be connected stably, the construction in the pipe jacking well is convenient, and many problems faced by the cast-in-place super-deep inspection well can be effectively solved, which becomes an inevitable trend of the development of inspection well construction technology, so as to meet the construction needs of high efficiency, stability and easy maintenance of modern urban underground pipeline system.

[0048] In the embodiment, the top end of the lower shaft chamber 1 can be uniformly and circumferentially spaced apart by three first reserved holes 4, and the sidewall of the upper shaft chamber 2 is provided with three first positioning holes 5, and the three first positioning holes 5 correspond one by one to the three first reserved holes 4.

[0049] For example, referring to Figure 4 , the sidewall of the upper shaft chamber 2 is provided with three first positioning holes 5, and each of the three first positioning holes 5 is provided with a first positioning steel bar 3, and the bottom end of the first positioning steel bar 3 penetrates the first positioning hole 5 and extends into the corresponding first reserved hole 4. The more the number of first positioning steel bars 3, the more stable the connection between the upper shaft chamber 2 and the lower shaft chamber 1.

[0050] In the embodiment, the lower shaft chamber 1 can be an outer square and inner circle structure.

[0051] The outer square and inner circle structure design makes the well seat more evenly disperse stress, the square base increases the contact area with the surrounding soil or foundation, improves the stability, is easy for construction personnel to position and align, improves the construction efficiency and quality; the circular well mouth can better bear the vertical pressure, and can effectively prevent the deformation and damage of the well seat.

[0052] Among them, the lower shaft chamber 1 can be cast-in-place, as Figure 8 shown, the outer square and inner circle structure form is made based on the existing pipe jacking well bottom plate, the corresponding wall thickness and steel bar size are adjusted according to the buried depth of the inspection well, and the socket is reserved. And the lower shaft chamber 1 and the upper shaft chamber 2 are both provided with a ladder, which is convenient for the up and down movement of the staff.

[0053] In the embodiment, the upper shaft chamber 2 is provided with a maintenance platform 7.

[0054] For example, referring toFigure 1 The inner wall of the upper chamber 2 is provided with a maintenance platform 7, which provides a standing platform for the staff.

[0055] The maintenance platform 7 can be a hollow structure, and the maintenance platform 7 is provided with a guardrail.

[0056] For example, referring to Figure 4 , the maintenance platform 7 adopts a left half-hollow form, and the guardrail is arranged along the edge of the hollow area to play a protective role. In the limited space of the well, good ventilation is very important, and the half-hollow structure helps the circulation of air, improves the air quality in the well, and provides a relatively safe working environment for the maintenance personnel. Compared with the fully enclosed platform, the half-hollow design can significantly reduce the self-weight of the maintenance platform, and is also convenient for the installation and later maintenance operation of the platform, reducing the construction difficulty and cost. The half-hollow part can allow the maintenance personnel to directly observe the part of the well below the platform on the platform, without the need to frequently move up and down to view the situation at different positions, thereby improving the maintenance efficiency.

[0057] For example, referring to Figures 9-11 The upper chamber 2 can be assembled vertically from a plurality of upper chamber units 19, each of which is factory-made. Each upper chamber unit 19 needs to be preformed with a socket, and adjacent upper chamber units 19 are connected through the socket, and a cement mortar layer is arranged between the adjacent upper chamber units 19, and the cement mortar layer is provided with a sealing ring 16 and a water-swelling waterstop 17. The side wall of the upper chamber unit 19 is preformed with a through hole penetrating upward and downward, and the through holes of the plurality of upper chamber units 19 are aligned to form the first positioning hole 5. The upper chamber unit 19 is 1 m high, which is convenient for installation and transportation.

[0058] The outer side of the maintenance platform 7 can be provided with a lap joint ring, and the lap joint ring is similar in structure to the upper chamber unit 19. When the maintenance platform 7 is installed, the lap joint ring on the outer side of the maintenance platform 7 is arranged between the adjacent two upper chamber units 19.

[0059] In order to protect the safety of the maintenance personnel, the maintenance platform 7 can be arranged every four meters high, that is, every four upper chamber units 19 can be installed with a lap joint ring of the maintenance platform 7. The adjacent maintenance platforms 7 are arranged at an angle of 120° upward and downward, so as to avoid the maintenance personnel from falling to the bottom in the ultra-deep inspection well.

[0060] The maintenance platform 7 is provided with a manhole, and the manhole is provided with a cover plate 15.

[0061] For example, referring to Figure 4 , the cover plate 15 is a stainless steel grid cover plate which can be opened, and is convenient for the staff to pass up and down.

[0062] Embodiment 2

[0063] The prefabricated inspection well provided by the embodiment further comprises an adjusting ring 8 and a second positioning steel bar 11.

[0064] The well chamber closing top plate 6 is provided with an inlet, and the adjusting ring 8 is arranged at the inlet. The well chamber closing top plate 6 is provided with a second reserved hole 9 at the top end. The second positioning hole 10 is vertically arranged on the side wall of the adjusting ring 8. The second positioning steel bar 11 is arranged in the second positioning hole 10 and extends into the second reserved hole 9. The second positioning hole 10 and the second positioning steel bar 11 are filled with cement mortar.

[0065] For example, referring to Figures 5-6 The inlet edge of the well chamber closing top plate 6 is provided with a vertical second reserved hole 9. The well chamber closing top plate 6 is provided with a socket at the top end, and the adjusting ring 8 is provided with a spigot at the bottom end. The adjusting ring 8 is connected with the well chamber closing top plate 6 through the socket and the spigot. A cement mortar layer is arranged between the adjusting ring 8 and the well chamber closing top plate 6, and a water-swelling sealing strip 17 is arranged in the cement mortar layer. The second positioning hole 10 is vertically arranged on the side wall of the adjusting ring 8, and the second positioning hole 10 is aligned with the second reserved hole 9.

[0066] The second positioning steel bar 11 is vertically arranged in the second positioning hole 10 and extends to the bottom of the second reserved hole 9. The space between the second reserved hole 9 and the second positioning steel bar 11 is filled with cement mortar, and the space between the second positioning hole 10 and the second positioning steel bar 11 is also filled with cement mortar. The cement mortar can improve the connection stability of the second positioning steel bar 11, the adjusting ring 8 and the well chamber closing top plate 6.

[0067] Based on the above structure, after the adjusting ring 8 and the well chamber closing top plate 6 are assembled, the second positioning steel bar 11 is inserted into the second reserved hole 9 through the second positioning hole 10, and then grouting is performed to connect the adjusting ring 8 and the well chamber closing top plate 6 stably, which is convenient for construction in the pipe jacking well.

[0068] In the embodiment, two second reserved holes 9 are uniformly and circumferentially arranged at the top end of the well chamber closing top plate 6, and two second positioning holes 10 are arranged on the side wall of the adjusting ring 8. The two second positioning holes 10 correspond to the two second reserved holes 9 one by one.

[0069] For example, referring to Figure 5 Two second positioning holes 10 are arranged on the side wall of the well chamber 2, and one second positioning steel bar 11 is arranged in each of the two second positioning holes 10. The second positioning steel bar 11 extends into the corresponding second reserved hole 9 through the second positioning hole 10. The more the number of the second positioning steel bars 11, the more stable the connection between the adjusting ring 8 and the well chamber closing top plate 6.

[0070] The top end of the adjusting ring 8 is provided with a support 12, the support 12 is provided with a mounting hole 13 corresponding to the second positioning hole 10, the top end of the second positioning steel bar 11 penetrates through the mounting hole 13 and extends above the support 12, and the top end of the second positioning steel bar 11 is bent.

[0071] For example, referring to Figure 6 , the support 12 is used for installing the well cover. The top end of the second positioning steel bar 11 extends above the support 12 and is bent to the left to form a hook, which can prevent the second positioning steel bar 11 from falling down.

[0072] The adjusting ring 8 is provided with a falling prevention net 14.

[0073] For example, referring to Figure 7 , the inner wall of the adjusting ring 8 is provided with a hook 18, and the falling prevention net 14 is hung on the hook 18. The hook 18 is embedded in the adjusting ring 8 away from one end of the falling prevention net 14. The falling prevention net 14 can play a certain protection role to avoid personnel falling to the bottom.

[0074] In the embodiment, the adjusting ring 8 can be assembled vertically by a plurality of adjusting ring units, and the assembling mode is the same as that of the upper shaft room unit 19, which will not be repeated here.

[0075] In summary, the construction method of the assembled inspection well provided in the embodiment can include the following steps:

[0076] Step 1, construction preparation; according to the depth of the inspection well, the size and reinforcement of the cast-in-place lower shaft room are determined, the upper shaft room, the maintenance platform, the shaft room closing top plate, the well cover support and the adjusting ring are precast by the manufacturer, and the first positioning hole is reserved in the upper shaft room. During transportation, attention should be paid to protect the socket and each component from being damaged.

[0077] Step 2, pouring of the lower shaft room; after the pipe jacking construction is completed, the contact surface of the pipe jacking well bottom plate is chiseled, the lower shaft room is poured by the way of planting steel bars, and the first reserved hole is reserved, the depth of which is not less than 300mm. The socket required for installation is formed by a mold, and an O-shaped sealing ring is sleeved on the socket, and a water-swelling water stop strip is pasted on the top.

[0078] Step 3, installation of prefabricated components; after the cast-in-place lower shaft room reaches the design strength requirement, the prefabricated upper shaft room is installed by a crane. Before installation, the first positioning hole and the first reserved hole are aligned, and an O-shaped sealing ring is sleeved on the socket in advance, a water-swelling water stop strip is pasted on the top, M30 cement mortar is applied, after installation, waterproof mortar is poured at the socket, the hole is plugged, and water leakage is prevented. The distance between the maintenance platforms is set to 4m, and the adjacent maintenance platforms are set at an angle of 120° during installation. During on-site installation, the first positioning steel bar is used for positioning and installation, and after installation, it is removed for the next section installation, and a temporary safety guardrail is installed in the hollow part of the maintenance platform in advance.

[0079] Step 4, steel bar insertion and grouting; after the upper well chamber is installed, a first positioning steel bar is inserted from the top end of the upper well chamber, and then M30 cement mortar is injected into the hole to fill the hole. The grouting pipe must be inserted to the bottom end, and then the pressure grouting operation is unfolded from bottom to top to prevent the insufficient grouting in the middle part.

[0080] Step 5, installation of adjusting ring and well lid support; after the lower structure is installed, the installation of the adjusting ring and the well lid support is carried out on the ground. The adjusting ring is provided with a second positioning hole and a socket, and before installation, a water-swelling sealing strip is pasted in the socket, and M30 cement mortar is applied to fill the gap. After the installation of the adjusting ring is completed, the installation of the well lid support is started. The second positioning steel bar is inserted into the installation hole of the support, and the second positioning steel bar is required to be inserted into the second reserved hole of the well chamber closing top plate, and finally assembled, and then M30 cement mortar is used to fill the hole, and thus the construction process of the inspection well is completed.

[0081] In the utility model, the mechanisms, components and parts which are not described in the specific structure are all the existing structures which already exist in the prior art. They can be directly purchased from the market.

[0082] In the description of the utility model, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, and a specific orientation structure and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0083] The above is only a preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A modular inspection chamber, characterised in that, include: The lower well chamber (1) has a first reserved hole (4) at its top. The upper well chamber (2) is located at the top of the lower well chamber (1), and the upper well chamber (2) has a first positioning hole (5) running through its side wall. The bottom end of the first positioning steel bar (3) passes through the first positioning hole (5) and extends into the first reserved hole (4). Cement mortar is filled between the first positioning hole (5) and the first positioning steel bar (3) and between the first reserved hole (4) and the first positioning steel bar (3). The top plate (6) of the well chamber is installed at the top opening of the upper well chamber (2).

2. The fabricated inspection chamber of claim 1, wherein, The lower well chamber (1) has three first reserved holes (4) evenly spaced along the circumference at its top, and the upper well chamber (2) has three first positioning holes (5) on its side wall. The three first positioning holes (5) correspond one-to-one with the three first reserved holes (4).

3. The fabricated inspection chamber of claim 1, wherein, The lower well chamber (1) has a square outer shape and a round inner shape.

4. The fabricated inspection chamber of claim 1, wherein, The upper well chamber (2) is equipped with a maintenance platform (7).

5. The fabricated inspection chamber of claim 4, wherein, The maintenance platform (7) has a hollow structure and is equipped with guardrails.

6. The fabricated inspection chamber of claim 4, wherein, The maintenance platform (7) is provided with a manhole, and the manhole is provided with a cover plate (15).

7. The fabricated inspection chamber of claim 1, wherein, It also includes a second positioning steel bar (11); The top plate (6) of the well chamber has an entrance, and an adjustment ring (8) is provided at the entrance. The top of the top plate (6) of the well chamber has a second reserved hole (9). The side wall of the adjustment ring (8) is provided with a second positioning hole (10) running through it. The bottom end of the second positioning steel bar (11) runs through the second positioning hole (10) and extends into the second reserved hole (9). Cement mortar is filled between the second positioning hole (10) and the second positioning steel bar (11), and between the second reserved hole (9) and the second positioning steel bar (11).

8. The fabricated inspection chamber of claim 7, wherein, The top of the adjustment ring (8) is provided with a support (12), and the support (12) is provided with an installation hole (13) corresponding to the second positioning hole (10). The top of the second positioning steel bar (11) passes through the installation hole (13) and extends to the top of the support (12), and the top of the second positioning steel bar (11) is bent.

9. The fabricated inspection chamber of claim 7, wherein, The top of the well chamber top plate (6) is provided with two second reserved holes (9) evenly spaced along the circumference, and the side wall of the adjustment ring (8) is provided with two second positioning holes (10), and the two second positioning holes (10) correspond one-to-one with the two second reserved holes (9).

10. The fabricated inspection chamber of claim 7, wherein, The adjustment ring (8) is equipped with a fall protection net (14).

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