A quasi-rectangular shield pipe gallery working well

Abstract

The application discloses a kind of rectangular shield pipe gallery working well, including first working area and second working area sequentially arranged along up-down direction, first working area bottom is provided with base plate, excavator and heading machine are operated on base plate, base plate includes first base plate arranged in middle part, first base plate is detachably provided with second base plate on the left and right sides respectively, the outside of second base plate is fixedly connected with vertical reinforcing member, vertical reinforcing member is suitable for supporting first working area, when first working area is completed, first base plate and second base plate are separated and remove first base plate, so that excavator is operated on second base plate to dig second working area.The purpose of the application is to provide a kind of rectangular shield pipe gallery working well with low construction difficulty and small construction difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of subway laying, in particular to a kind of rectangular shield pipe gallery working well. BACKGROUND

[0002] Shield pipe gallery working well is an important engineering part in the process of shield construction, used to support and maintain the construction of shield machine, and to carry out related construction operations. It usually includes the following main functions: (1) installation and maintenance of shield machine, working well is the import and export of shield machine, used for assembly, disassembly, repair and maintenance of shield machine, in the working well, construction personnel can carry out necessary maintenance and maintenance to shield machine to ensure the normal work of shield machine; (2) import and export of construction materials and equipment, working well is also the channel for construction materials and equipment to enter and exit shield construction site, which is convenient for material scheduling and management of construction site; (3) import and export of construction personnel, working well is the main entrance and exit of shield construction site, which is convenient for construction personnel to enter and exit, and ensures the smooth progress of construction work; (4) construction safety and emergency evacuation channel, working well is also the emergency evacuation channel of shield construction site, which provides a safe escape channel for construction personnel; (5) propulsion of shield machine and treatment of earthwork, working well also undertakes the propulsion of shield machine and the treatment of earthwork in the process of shield construction, to ensure the smooth propulsion of shield machine and the timely cleaning of earthwork. In short, rectangular shield pipe gallery working well plays an important role in shield construction, it is the core area of shield construction site, provides necessary equipment, materials and personnel support for shield construction, and is also an important channel for construction safety and emergency evacuation.

[0003] However, the existing shield pipe gallery working well usually adopts circular structure, although the circular shield structure has advantages in stress and mature technology, but the circular structure has the disadvantages of small containing space, poor applicability, difficult to accommodate more underground pipelines, etc.

[0004] Therefore, the skilled person has developed a kind of rectangular shield pipe gallery working well, which has the following advantages compared with circular cross section: (1) larger cross-sectional area: due to the design of rectangular cross section, rectangular shield can provide larger cross-sectional area under the same outer diameter, which means larger passing space and larger carrying capacity; (2) higher applicability: the structure of rectangular cross section is more suitable for some special geological conditions, for example, in the case of needing to bear larger load or higher underground water level, rectangular shield may be more suitable; (3) easier to adapt to underground pipelines: rectangular cross section shield is easier to adapt to existing underground pipelines and facilities, because its edge is more regular, which can better cooperate with other structures.

[0005] However, rectangular shield pipe gallery working well has the disadvantages of large construction difficulty and large construction difficulty, which is a problem to be solved by the skilled person in the art. SUMMARY

[0006] An object of the present application is to provide a kind of rectangular shield pipe gallery working well with low construction difficulty, small construction difficulty.

[0007] To achieve the above object, the technical scheme applied by the present application is as follows: a kind of rectangular shield pipe gallery working well, including first working area and second working area arranged in sequence along up-down direction, the first working area bottom is provided with base plate, excavator and heading machine are operated on the base plate, the base plate includes the first base plate arranged in the middle, the left and right sides of the first base plate are respectively detachably provided with the second base plate, the outer side of the second base plate is fixedly connected with vertical reinforcing member, the vertical reinforcing member is suitable for supporting the first working area, when the first working area is completed, the first base plate and the second base plate are separated and the first base plate is removed, so that the excavator is operated on the second base plate to dig the second working area.

[0008] It is worth mentioning that the first working area can be used as equipment layer, mainly used for placing heating, fire fighting, power, automatic control and other equipment, ventilation fan room and air shaft, power distribution facility room, automatic control equipment room, lifting facilities, passageway and mouth, pipeline lead passageway and mouth, high pressure water mist pump room and other functional spaces can be integrated in the first working area;In addition, the second working area can be used as pipeline lead layer and has functions such as earth removal during construction, construction personnel and material access, etc., wherein one side of the second working area is connected with section pipe gallery high voltage power cabin as high voltage power lead area, and the other side is connected with section pipe gallery comprehensive cabin as comprehensive pipeline (low voltage power, communication, water supply) lead area.Moreover, a water collecting and draining pit can be formed in the lower part of the second working area to meet the water collecting and draining requirements in construction stage and operation stage.

[0009] The reason why the existing rectangular shield pipe gallery working well has large construction difficulty and construction difficulty is mainly as follows:

[0010] (1) The earth moving operation area is large, if the two layer working areas are directly formed by excavator, the ground surface to be destroyed is large, and in the actual digging process, large range of cavity is easy to cause the collapse of nearby ground, thereby affecting the safety of other nearby buildings;

[0011] (2) If the first working area and the second working area are excavated in sequence, the soil around the first working area, especially the soil at the bottom of the first working area, is prone to collapse during the excavation of the second working area. If the concrete is poured on the bottom wall of the first working area before the operation, the excavator may cause the concrete to crack during operation, increasing the construction time and making the construction of such a rectangular shield pipe gallery working well time-consuming and laborious.

[0012] The rectangular shield pipe gallery working well of the present application is operated by the following steps:

[0013] S100, using an excavator to operate on the ground and excavate a first foundation pit for forming the first working area;

[0014] S200, laying a first base plate at the bottom of the first foundation pit, and then operating the excavator or the tunneling machine on the first base plate to the left and right sides to expand the distance between the left and right sides of the first foundation pit;

[0015] S300, after excavating to the appropriate position, installing a second base plate on the left and right sides of the first base plate, and installing a vertical reinforcing member (usually made of reinforced concrete) for supporting the first working area outside the second base plate;

[0016] S400, then separate and remove the first base plate, and make the excavator excavate downward on the second base plate to form a second foundation pit for forming the second working area;

[0017] S500, operating the excavator or the tunneling machine on the second foundation pit to the left and right sides to expand the distance between the left and right sides of the second foundation pit and form the second working area;

[0018] S600, laying a reinforced concrete layer on the inner walls of the first working area and the second working area to reinforce the first working area and the second working area.

[0019] It is worth mentioning that in S200, the top of the first foundation pit is in communication with the outside world, preventing the collapse of the soil at the top of the first foundation pit and reducing the construction difficulty. After S600, the damage of such a rectangular shield pipe gallery working well to the ground can be reduced by backfilling the soil.

[0020] The rectangular shield pipe gallery working well of the present application has the following beneficial effects:

[0021] (1) Since the first base plate and the second base plate are used, and the excavator excavates the second foundation pit on the second base plate after the first working area is excavated, the first working area and the second working area are not excavated at one time, the soil area is not too large, the nearby ground is not prone to collapse, and the safety of surrounding buildings is not affected;

[0022] (2) The excavator or the tunneling machine works on the first base plate or the second base plate, which can reduce the pressure intensity of the excavator or the tunneling machine on the bottom of the first foundation pit during the working process, thereby avoiding the collapse of the first foundation pit, and the first base plate and the second base plate can share the downward force of the excavator or the tunneling machine, thereby reducing the direct damage of the excavator or the tunneling machine to the first foundation pit by increasing the stress area, and the concrete layer is not damaged, time and cost are saved;

[0023] (3) The first base plate and the second base plate are detachably connected, in the connected state, the vertical reinforcing member arranged in the vertical direction is conveniently installed, the side wall of the second base plate cannot abut against the vertical reinforcing member, the vertical reinforcing member shakes back and forth, and a safety hazard is caused in the construction process; in the separated and removed state, the excavator can work on the second base plate to excavate the second foundation pit, the collapse of the bottom of the first foundation pit is reduced during the excavation process, thereby reducing the construction difficulty and increasing the construction speed;

[0024] (4) By arranging the vertical reinforcing member, after the first working area is excavated, the vertical reinforcing member is used to support the first working area to prevent the collapse of the soil layer around the first working area during the excavation of the second working area, since only the vertical reinforcing member is arranged to support the first working area in the upward and downward directions, and the base plate is arranged to support the second working area in the left and right directions, the use of concrete in other positions is reduced, thereby avoiding the breakage of the concrete and reducing the construction time.

[0025] Further preferably, the second base plate comprises an expansion base plate, the first base plate is provided with a connecting tooth protruding towards the expansion base plate, the expansion base plate is provided with a connecting groove matched with the connecting tooth, the first base plate and the expansion base plate are detachably connected through the connecting tooth and the connecting groove, and only a limiting force in the front and back directions and in the left and right directions acts between the connecting tooth and the connecting groove. Further preferably, the second base plate further comprises a connecting base plate, the connecting base plate is arranged outside the expansion base plate, locking teeth and locking grooves are arranged in the front and back directions between the connecting base plate and the expansion base plate in sequence and alternately, the locking teeth and the locking grooves are matched with each other, and the expansion base plate and the connecting base plate are detachably connected through the locking teeth and the locking grooves.

[0026] Further preferably, the locking teeth and the inner walls of the locking grooves are both T-shaped in horizontal cross-section, with the horizontal axis of the T-shaped structure arranged in the front-rear direction and the vertical axis of the T-shaped structure arranged in the left-right direction; the locking teeth are arranged on the left and right sides of the connecting base plate; the locking grooves matching the locking teeth are arranged on the extension base plate; the cross-section of the locking teeth in the up-down direction is wedge-shaped, with the left and right side walls of the wedge-shaped structure abutting the left and right inner walls of the locking grooves; the connecting base plate is adapted to be installed on the extension base plate from top to bottom, and after installation, the locking teeth and the locking grooves are elastically deformed.

[0027] Further preferably, the outer side of the connecting base plate is provided with a fixing base plate, the fixing base plate is provided with the locking grooves matching the locking teeth on the side close to the connecting base plate, the fixing base plate is installed on the outer side of the connecting base plate from bottom to top, the cross-section of the fixing base plate in the front-rear direction is L-shaped, with the vertical edge arranged in the up-down direction and the horizontal edge arranged in the left-right direction and facing the connecting base plate; the outer side of the vertical edge abuts the inner side of the vertical reinforcing member and is fixedly connected with the vertical reinforcing member; after the construction of the first working area is completed, the first base plate is separated from the extension base plate and removed, so that the excavator performs the excavation work on the second working area on the connecting base plate.

[0028] Further preferably, the bottom of the extension base plate is provided with connecting columns arranged in the vertical direction, the connecting columns are arranged symmetrically on the left and right sides of the base plate and are provided in at least four groups, the top of the connecting column abuts the bottom of the extension base plate, and the bottom of the connecting column abuts the bottom wall of the second working area.

[0029] Further preferably, the top of the connecting base plate is provided with a protruding portion protruding upward, the top of the extension base plate and the top of the fixing base plate are respectively provided with a first detection surface and a second detection surface, and the vertical distance between the protruding portion and the first detection surface or the second detection surface is detected to determine whether the connecting base plate, the extension base plate and the fixing base plate are installed in place in the vertical direction.

[0030] Further preferably, the base plate includes a replacement base plate, which is adapted to be installed between the second base plates on the left and right sides after the excavation of the foundation pit of the second working area is completed, the distance between the replacement base plates in the left-right direction is L1, the distance between the first base plates in the left-right direction is L2, and L1 < L2 is satisfied.

[0031] Further preferably, the replacement base plate is provided with a personnel access opening, which communicates the first working area and the second working area.

[0032] It is further preferred that a steel bar layer is laid on the substrate, which is suitable for laying and forming a reinforced concrete layer.

[0033] Compared with the prior art, the rectangular shield pipe gallery working well has the following beneficial effects:

[0034] (1) Since the first substrate and the second substrate are adopted, and the excavator performs the excavation work of the second foundation pit on the second substrate after the excavation of the first working area is completed, the one-time excavation of the first working area and the second working area is avoided, the excessive earthwork area is avoided, the nearby ground collapse is avoided, and the safety of the surrounding buildings is avoided;

[0035] (2) The excavator or the heading machine performs the work on the first substrate or the second substrate, which can reduce the pressure intensity of the excavator or the heading machine on the bottom of the first foundation pit during the work, thereby avoiding the collapse of the first foundation pit. The first substrate and the second substrate can share the downward force of the excavator or the heading machine, thereby reducing the direct damage of the excavator or the heading machine to the first foundation pit by increasing the stress area, and the concrete layer is not damaged, time and cost are saved;

[0036] (3) The first substrate and the second substrate are detachably connected, in the connected state, the vertical reinforcing member arranged in the vertical direction is conveniently installed, the safety hidden danger in the construction process is caused by the back and forth shaking of the vertical reinforcing member due to the inability of the sidewall of the second substrate to abut against the vertical reinforcing member; in the separated and removed state, the excavator performs the excavation of the second foundation pit on the second substrate, the collapse of the bottom of the first foundation pit during the excavation is reduced, thereby reducing the construction difficulty and increasing the construction speed;

[0037] (4) By arranging the vertical reinforcing member, after the excavation of the first working area is completed, the vertical reinforcing member is used to support the first working area, so as to prevent the collapse of the soil layer around the first working area during the excavation of the second working area. Since only the vertical reinforcing member is arranged to support the first working area in the upward and downward directions, and the substrate is arranged to support the second working area in the left and right directions, the use of concrete in other positions is reduced, thereby avoiding the breakage of the concrete and reducing the construction time. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 FIG. 1 is a schematic view of an embodiment of the pipe gallery working well of the present application, which shows the first working area and the second working area.

[0039] Figure 2 FIG. 2 is a schematic view of an embodiment of the pipe gallery working well of the present application, which shows the first substrate and the second substrate.

[0040] Figure 3 FIG. 3 is an exploded view of an embodiment of the pipe gallery working well of the present application.

[0041] Figure 4 A cross-sectional view of an embodiment of a pipe rack manway of the present application showing a first foundation pit.

[0042] Figure 5 A cross-sectional view of an embodiment of a pipe rack manway of the present application showing a base plate installed at the bottom of the first foundation pit.

[0043] Figure 6 A schematic view of an embodiment of a pipe rack manway of the present application showing a first base plate removal state.

[0044] Figure 7 A cross-sectional view of an embodiment of a pipe rack manway of the present application showing a second foundation pit.

[0045] Figure 8 An exploded view of an embodiment of a pipe rack manway of the present application showing a first base plate and a replacement base plate.

[0046] Figure 9 A schematic view of an embodiment of a pipe rack manway of the present application showing an extension base plate and a connection base plate.

[0047] Figure 10 A cross-sectional view of an embodiment of a pipe rack manway of the present application showing a locking tooth and a locking groove.

[0048] Figure 11 A cross-sectional view of an embodiment of a pipe rack manway of the present application showing an extension base plate and a connection base plate connected together.

[0049] Figure 12 A schematic view of an embodiment of a pipe rack manway of the present application showing a fixed base plate and a connection base plate.

[0050] Figure 13 A cross-sectional view of an embodiment of a pipe rack manway of the present application showing a locking tooth and a locking groove.

[0051] Figure 14 A cross-sectional view of an embodiment of a pipe rack manway of the present application showing a connection base plate and a fixed base plate connected together.

[0052] In the figure: 1, base plate; 11, first base plate; 111, connecting tooth; 12, second base plate; 121, extension base plate; 1211, connecting groove; 1212, locking groove; 1213, first detection surface; 1214, connecting column; 122, connecting base plate; 1221, locking tooth; 1222, protruding part; 13, fixed base plate; 131, horizontal edge; 132, vertical edge; 133, second detection surface; 14, replacement base plate; 141, personnel access; 2, first working area; 3, second working area; 4, vertical reinforcing member; 100, first foundation pit; 200, second foundation pit. DETAILED DESCRIPTION

[0053] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments between or between technical features can be combined to form new embodiments without conflict.

[0054] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. The orientation and positional relationship shown in the drawing is based on the orientation or positional relationship shown in the drawing, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0055] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a specific order or chronological order.

[0056] The terms "include" and "have" in the specification and claims of the present application, as well as any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0057] Specific analysis of the reasons why the existing rectangular shield pipe gallery working well construction is difficult and difficult to build is mainly due to:

[0058] (1) The area of earthmoving operation is large. If the two-layer working area is directly excavated by an excavator, the area of the ground to be destroyed is large, and in the actual excavation process, a large range of cavities is easy to cause the collapse of the nearby ground, thereby affecting the safety of other nearby buildings;

[0059] (2) If the construction is carried out by excavating the first working area 2 and the second working area 3 in sequence, the soil around the first working area 2 may collapse during the excavation of the second working area 3, especially the soil at the bottom of the first working area 2. If concrete is poured on the bottom wall of the first working area 2 before the operation, the excavator may cause concrete cracking and other problems during the operation, which will increase the construction time and make the construction of this type of rectangular shield tunnel working shaft time-consuming and labor-intensive.

[0060] Accordingly, the inventors of this application have developed a rectangular shield tunnel working shaft, one embodiment of which is, for example... Figures 1 to 14 As shown, the system includes a first working area 2 and a second working area 3 arranged sequentially in a vertical direction. A base plate 1 is provided at the bottom of the first working area 2. Excavators and tunneling machines operate on the base plate 1. The base plate 1 includes a first base plate 11 located in the middle, and second base plates 12 detachably provided on the left and right sides of the first base plate 11. Vertical reinforcing members 4 are fixedly connected to the outer sides of the second base plates 12, and these members are adapted to support the first working area 2. After the first working area 2 is constructed, the first base plate 11 and second base plates 12 are separated and the first base plate 11 is removed, allowing the excavator to perform excavation work on the second base plate 12 in the second working area 3. Furthermore, "complete construction of the first working area 2" means that the excavation of the first working area 2 is completed and the vertical reinforcing members 4 have been reinforced. At this point, the first base plate 11 can be removed, and the excavator can then perform excavation work on the second base plate 12 in the second pit 200.

[0061] It is worth mentioning that the first working area 2 can be used as an equipment layer, mainly for housing HVAC, fire protection, power, and automation equipment. The first working area 2 can integrate ventilation fan rooms and shafts, power distribution rooms, automation equipment rooms, hoisting facilities, passageways and entrances, pipeline exit passageways and entrances, and high-pressure fine water mist pump rooms. The second working area 3 can be used as a pipeline exit layer, simultaneously serving as a space for excavation, personnel and material access during construction. One side of the second working area 3 connects to the high-voltage power compartment of the utility tunnel section, serving as a high-voltage power exit area, while the other side connects to the integrated utility tunnel section, serving as an integrated pipeline (low-voltage power, communication, and water supply) exit area. Furthermore, a water collection and drainage pit can be constructed at the bottom of the second working area 3 to meet the water collection and drainage needs during construction and operation. (The specific distribution and use of the first working area 2 and the second working area 3 are existing technologies and will not be elaborated here.)

[0062] The rectangular shield tunnel working shaft of this application is operated using the following steps (such as...). Figures 4 to 7 (as shown)

[0063] S100, using the excavator to work on the ground and excavate to form a first foundation pit 100 for forming the first work area 2, as shown in Figure 4 ;

[0064] S200, as shown in Figure 4 , laying the first base plate 11 at the bottom of the first foundation pit 100, and then making the excavator or tunneling machine work on the first base plate 11 to the left and right sides (as shown by the arrow direction), thereby expanding the distance between the left and right sides of the first foundation pit 100; Figure 4

[0065] S300, after excavating to the appropriate position, as shown in Figure 5 , installing the second base plate 12 on the left and right sides of the first base plate 11, and installing the vertical reinforcing member 4 (usually made of reinforced concrete) for supporting the first work area 2 outside the second base plate 12. It is worth mentioning that since the first base plate 11 and the second base plate 12 are connected in sequence along the left and right directions, when installing the bottom of the vertical reinforcing member 4, it can determine the relative position of the reinforcing member 4 by abutting against the side wall of the second base plate 12 and the side wall of the first foundation pit 100. After installation is completed, the possibility of left and right shaking of the reinforcing member 4 can be reduced by fixing the upper end of the reinforcing member 4 to the side wall of the first foundation pit 100, so that the supporting performance of the reinforcing member 4 is further improved;

[0066] S400, then separate and remove the first base plate 11, and make the excavator work downward on the second base plate 12 and excavate to form a second foundation pit 200 for forming the second work area 3, as shown in Figure 7 ;

[0067] S500, making the excavator or tunneling machine work on the left and right sides of the second foundation pit 200 (as shown by the arrow direction), thereby expanding the distance between the left and right sides of the second foundation pit 200 and forming the second work area 3; Figure 7

[0068] S600, laying a reinforced concrete layer on the inner walls of the first work area 2 and the second work area 3 to reinforce the first work area 2 and the second work area 3.

[0069] It is worth mentioning that in S200, the top of the first foundation pit 100 is in communication with the outside world, which prevents the soil at the top of the first foundation pit 100 from collapsing and also reduces the construction difficulty. After S600, the damage of such a rectangular shield pipe gallery working well to the ground can be reduced by backfilling the soil.

[0070] The rectangular shield pipe gallery working well of the present application has the following beneficial effects:

[0071] ​​(1) Since the first substrate 11 and the second substrate 12 are adopted, and the excavator carries out the excavation work of the second foundation pit 200 on the second substrate 12 after the excavation of the first working area 2 is completed, the one-time excavation of the first working area 2 and the second working area 3 can be avoided, the excessive earthwork area can be avoided, the nearby ground collapse can be avoided, and the safety of the surrounding buildings can be avoided;

[0072] (2) The excavator or the tunneling machine carries out the work on the first substrate 11 or the second substrate 12, the pressure on the bottom of the first foundation pit 100 caused by the excavator or the tunneling machine during the work can be reduced, the collapse of the first foundation pit 100 can be avoided, the first substrate 11 and the second substrate 12 can share the downward force of the excavator or the tunneling machine, the direct damage of the excavator or the tunneling machine to the first foundation pit 100 can be reduced by increasing the stress area, the concrete layer will not be damaged, time and cost can be saved;

[0073] (3) The first substrate 11 and the second substrate 12 are detachably connected, in the connected state, the vertical reinforcing member 4 arranged in the vertical direction is conveniently installed, the safety hazard in the construction process caused by the back-and-forth shaking of the vertical reinforcing member 4 due to the inability of the sidewall of the second substrate 12 to abut against the vertical reinforcing member 4 is prevented, in the separated and removed state, the excavator carries out the excavation of the second foundation pit 200 on the second substrate 12, the collapse of the bottom of the first foundation pit 100 in the excavation process is reduced, the construction difficulty is reduced, and the construction speed is increased;

[0074] (4) The vertical reinforcing member 4 is arranged to support the first working area 2 after the excavation of the first working area 2 is completed, and prevent the collapse of the soil layer around the first working area 2 in the excavation process of the second working area 3, since only the vertical reinforcing member 4 is arranged to support the first working area 2 in the upward and downward directions, and the substrate 1 is arranged to support the second working area 3 in the left and right directions, the use of concrete in other positions is reduced, the breakage of the concrete is avoided, and the construction time is reduced.

[0075] Further preferably, as Figure 8As shown, the second substrate 12 comprises an extension substrate 121, the first substrate 11 is provided with a connecting tooth 111 protruding towards the extension substrate 121, the extension substrate 121 is provided with a connecting groove 1211 matching the connecting tooth 111, the first substrate 11 and the extension substrate 121 are detachably connected through the connecting tooth 111 and the connecting groove 1211, and only a restriction force along the front-back direction and the left-right direction acts between the connecting tooth 111 and the connecting groove 1211. The connecting tooth 111 and the connecting groove 1211 are provided to increase the connecting strength between the extension substrate 121 and the first substrate 11 and reduce the relative displacement therebetween. In addition, only the restriction force along the front-back direction and the left-right direction acts between the connecting tooth 111 and the connecting groove 1211, which facilitates the removal of the first substrate 11, i.e. the separation of the first substrate 11 from the extension substrate 121 can be achieved by driving the first substrate 11 to move relative to the extension substrate 121 along the up-down direction.

[0076] Further preferably, as shown in Figure 9 As shown, the second substrate 12 further comprises a connecting substrate 122, the connecting substrate 122 is arranged outside the extension substrate 121, and locking teeth 1221 and locking grooves 1212 are alternately arranged between the connecting substrate 122 and the extension substrate 121 along the front-back direction, the locking teeth 1221 and the locking grooves 1212 match each other, and the extension substrate 121 and the connecting substrate 122 are detachably connected through the locking teeth 1221 and the locking grooves 1212. The connecting substrate 122 is provided to cooperate with different lengths of the connecting substrate 122 according to the widths of different pipe gallery working wells, and the second pit 200 can be excavated by different sizes of excavators.

[0077] Further preferably, as shown in Figures 9 to 11 As shown, the inner walls of the locking teeth 1221 and the locking grooves 1212 are T-shaped in the horizontal cross section, the horizontal axis of the T shape is arranged along the front-back direction, the vertical axis of the T shape is arranged along the left-right direction, the locking teeth 1221 are protrudingly arranged on the left and right sides of the connecting substrate 122, the extension substrate 121 is provided with the locking grooves 1212 matching the locking teeth 1221, the cross section of the locking teeth 1221 along the up-down direction is wedge-shaped with a smaller lower end, the left and right side walls of the wedge-shaped locking teeth 1221 abut against the inner walls of the left and right sides of the locking grooves 1212, and the connecting substrate 122 is adapted to be installed on the extension substrate 121 from top to bottom (as shown by the arrow direction), and after the installation is completed, the locking teeth 1221 and the locking grooves 1212 are elastically deformed. Figure 10

[0078] As shown in Figure 10 ​As shown by the arrow direction, the connecting plate 122 is mounted on the extension plate 121 from top to bottom, and the locking teeth 1221 are clamped in the locking grooves 1212, at the same time, the locking teeth 1221 and the locking grooves 1212 are elastically deformed, and the locking force between the extension plate 121 and the connecting plate 122 is increased. And the cross section shape of the locking teeth 1221 in the up-down direction is wedge-shaped with the lower end smaller, as shown in Figure 9 and Figure 10 As shown, it is easy to understand that when the connecting plate 122 is subjected to a downward force, the deformation degree of the locking teeth 1221 and the locking grooves 1212 on the connecting plate 122 and the extension plate 121 will increase, at the same time, the connection strength of the connecting plate 122 and the extension plate 121 is increased; similarly, when the extension plate 121 is subjected to an upward force, the deformation degree of the locking teeth 1221 and the locking grooves 1212 on the connecting plate 122 and the extension plate 121 will increase, at the same time, the connection strength of the connecting plate 122 and the extension plate 121 is increased.

[0079] Further preferably, as shown in Figures 12 to 14 The outer side of the connecting plate 122 is provided with a fixed plate 13, the side close to the connecting plate 122 of the fixed plate 13 is provided with a locking groove 1212 matched with the locking teeth 1221, the fixed plate 13 is mounted on the outer side of the connecting plate 122 from bottom to top, the cross section shape of the fixed plate 13 along the front-back direction is L-shaped, and the vertical edge 132 is arranged along the up-down direction, the horizontal edge 131 is arranged along the left-right direction and towards the connecting plate 122, the outer side of the vertical edge 132 abuts against the inner side of the vertical reinforcing member 4, and is fixedly connected with the vertical reinforcing member 4, after the first working area 2 is completed, the first plate 11 and the extension plate 121 are separated and the first plate 11 is removed, so that the excavator performs the excavation operation on the second working area 3 on the connecting plate 122. As can be easily understood, since the locking teeth 1221 are protrudingly arranged on the left and right sides of the connecting plate 122, and the cross section shape of the locking teeth 1221 in the up-down direction is wedge-shaped with the lower end smaller, the side walls on the left and right sides of the wedge abut against the inner walls on the left and right sides of the locking groove 1212, therefore, during the installation process, as shown in Figure 13 the fixed plate 13 needs to be mounted on the connecting plate 122 from bottom to top, at the same time, when the connecting plate 122 is subjected to a downward force, the deformation degree of the locking teeth 1221 and the locking grooves 1212 on the connecting plate 122 and the fixed plate 13 will increase, at the same time, the connection strength of the connecting plate 122 and the fixed plate 13 is increased.

[0080] Based on the above structure, therefore, in actual use, by setting the excavator on the connecting base plate 122, and then excavating the second foundation pit 200, due to the gravity of the excavator downward, the connecting strength between the connecting base plate 122 and the fixed base plate 13 and the expansion base plate 121 is increased, preventing the fixed base plate 13 and the expansion base plate 121 from falling off during excavation.

[0081] And during excavation, due to the gravity of the excavator, the second base plate 12 and the fixed base plate 13 will generate a force in the left-right direction, acting on the vertical reinforcing member 4, and then the vertical reinforcing member 4 is subjected to an outward force, thereby improving the support performance of the vertical reinforcing member 4 to the first working area 2, thereby preventing the first foundation pit 100 from collapsing during the excavation of the second foundation pit 200.

[0082] In addition, the fixed base plate 13 is provided with an L-shaped cross section in the front-rear direction, and the vertical edge 132 is provided in the up-down direction, and the horizontal edge 131 is provided in the left-right direction and towards the connecting base plate 122, and the outer side of the vertical edge 132 abuts against the inner side of the vertical reinforcing member 4, which can facilitate the fixation of the vertical reinforcing member 4 by the fixed base plate 13 to reduce the difficulty of construction and building.

[0083] Further preferably, as shown in Figure 1 The bottom of the expansion base plate 121 is provided with a connecting column 1214 in the vertical direction, and the connecting column 1214 is provided with at least four groups and is symmetrically arranged on the left and right sides of the base plate 1, and the top of the connecting column 1214 abuts against the bottom of the expansion base plate 121, and the bottom of the connecting column 1214 abuts against the bottom wall of the second working area 3.

[0084] Because the left and right sides of the connecting base plate 122 are provided with locking teeth 1221, the expansion base plate 121 is provided with a locking groove 1212 matched with the locking teeth 1221, and the cross section of the locking teeth 1221 in the up-down direction is wedge-shaped with a smaller lower end, and the left and right side walls of the wedge-shaped abut against the inner walls of the left and right sides of the locking groove 1212, so that when the expansion base plate 121 is subjected to an upward force, the deformation degree of the locking teeth 1221 and the locking groove 1212 on the connecting base plate 122 and the expansion base plate 121 will increase, and at the same time, the connecting strength of the connecting base plate 122 and the expansion base plate 121 is increased. The connecting column 1214 is provided to apply an upward force to the expansion base plate 121, so that the connecting strength of the expansion base plate 121 and the connecting base plate 122 is increased during excavation, preventing the collapse of the first foundation pit 100, and in the specific construction process, as shown in Figure 7As shown, the second foundation pit 200 with smaller left and right width is excavated first, and then the excavator is used to excavate in the left and right directions, and the connecting column 1214 is arranged at the appropriate position, thereby playing the role of supporting the second working area 3 and increasing the stability of the second foundation pit 200 to prevent collapse during excavation.

[0085] Further preferably, as shown in Figure 11 and Figure 14 The top of the connecting base plate 122 is provided with a protruding portion 1222, the top of the expanding base plate 121 is provided with a first detection surface 1213, and the top of the fixed base plate 13 is provided with a second detection surface 133. The vertical distance between the protruding portion 1222 and the first detection surface 1213 or the second detection surface 133 is detected, and it is determined whether the connecting base plate 122, the expanding base plate 121, and the fixed base plate 13 are installed in place in the vertical direction. In this specific embodiment, the vertical distance between the top surface of the protruding portion 1222 and the first detection surface 1213 or the second detection surface 133 is measured to determine the connecting base plate 122, the expanding base plate 121, and the fixed base plate 13, and the bottom surfaces of the connecting base plate 122, the expanding base plate 121, and the fixed base plate 13 are in the same plane, thereby reducing the pressure on the bottom of the first foundation pit 100 by the excavator or the tunneling machine, and thereby reducing the problem of the first foundation pit 100 being crushed during excavation.

[0086] Further preferably, as shown in Figure 8 The base plate 1 includes a replacement base plate 14, which is adapted to be installed between the second base plates 12 on the left and right sides after the excavation of the foundation pit of the second working area 3 is completed. The distance of the replacement base plate 14 in the left and right directions is L1, and the distance of the first base plate 11 in the left and right directions is L2, satisfying L1 < L2.

[0087] Since the locking teeth 1221 are wedge-shaped structures, and during installation, the locking teeth 1221 and the locking grooves 1212 will directly elastically deform, so after the first base plate 11 is removed, part of the elastic stress between the locking teeth 1221 and the locking grooves 1212 will be released. After the excavation of the second working area 3 is completed, if the same size first base plate 11 is directly installed back, the installation difficulty will increase, and the problem of internal stress accumulation will easily occur, which may cause large cracking of the working well when it faces vibration and other working conditions. By setting the replacement base plate 14, and making the distance of the replacement base plate 14 in the left and right directions be L1, and the distance of the first base plate 11 in the left and right directions be L2, satisfying L1 < L2, the stress in the installation of the replacement base plate 14 can be reduced, thereby increasing the strength of the building and increasing its durability.

[0088] In addition, before the S600 step is performed, the installation of the replacement substrate 14 is performed, and then the reinforced concrete layer is laid on the replacement substrate 14, the second substrate 12 and the replacement substrate 14, and at the same time, the vertical reinforcing members 4 on the left and right sides need to be recast to meet the needs of the structure, that is, the acceptance. In addition, by controlling the size of the replacement substrate 14, the control of the internal stress of the substrate 1 is realized, so as to improve the perpendicularity of the vertical reinforcing members 4, so that it can better meet the requirements of the drawings during the construction process.

[0089] Further preferably, as shown in Figure 8 The personnel access 141 is provided on the replacement substrate 14 to communicate the first working area 2 and the second working area 3. The personnel access 141 is provided to facilitate the subsequent use and to facilitate the personnel flow and the material flow.

[0090] Further preferably, the substrate 1 is provided with a steel bar layer, and the steel bar layer is suitable for laying and forming a reinforced concrete layer. The steel bar layer laid on the substrate 1 can increase the strength of the ground of the first working area 2 of the pipe gallery working well and increase the service life of the pipe gallery working well to prevent the pipe gallery working well from collapsing and other problems.

[0091] The above describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A rectangular shield tunnel working shaft, characterized in that: The system includes a first working area and a second working area arranged sequentially in a vertical direction. A base plate is provided at the bottom of the first working area, on which an excavator and a tunneling machine operate. The base plate includes a first base plate located in the middle, and second base plates are detachably provided on the left and right sides of the first base plate. Vertical reinforcing members are fixedly connected to the outer side of the second base plate. The vertical reinforcing members are adapted to support the first working area. After the first working area is constructed, the first base plate and the second base plate are separated and the first base plate is removed, so that the excavator can perform excavation operations on the second base plate in the second working area.

2. The rectangular shield tunnel working shaft as described in claim 1, characterized in that: The second substrate includes an extended substrate. The first substrate has connecting teeth protruding towards the extended substrate. The extended substrate has connecting grooves that match the connecting teeth. The first substrate and the extended substrate are detachably connected through the connecting teeth and the connecting grooves. The connecting teeth and the connecting grooves are only subject to limiting forces in the front-back direction and the left-right direction.

3. The rectangular shield tunnel working shaft as described in claim 2, characterized in that: The second substrate further includes a connecting substrate, which is disposed on the outside of the expansion substrate. Locking teeth and locking grooves are alternately arranged between the connecting substrate and the expansion substrate in the front-back direction. The locking teeth and the locking grooves match each other. The expansion substrate and the connecting substrate are detachably connected through the locking teeth and the locking grooves.

4. The rectangular shield tunnel working shaft as described in claim 3, characterized in that: The locking teeth and the inner walls of the locking grooves are both T-shaped in horizontal cross-section, with the horizontal axis of the T-shape along the front-to-back direction and the vertical axis along the left-to-right direction. The locking teeth protrude from the left and right sides of the connecting base plate, and the locking grooves that match the locking teeth are provided on the expansion base plate. The locking teeth have a wedge-shaped cross-section with a smaller lower end in the vertical direction, and the side walls of the wedge abut against the inner walls of the left and right sides of the locking groove. The connecting base plate is suitable for installation on the expansion base plate from top to bottom, and after installation, the locking teeth and the locking groove undergo elastic deformation.

5. The rectangular shield tunnel working shaft as described in claim 4, characterized in that: A fixing plate is provided on the outer side of the connecting plate. The fixing plate has a locking groove that matches the locking teeth on the side close to the connecting plate. The fixing plate is installed on the outer side of the connecting plate from bottom to top. The cross-sectional shape of the fixing plate in the front-back direction is L-shaped, with the vertical side arranged in the up-down direction and the horizontal side arranged in the left-right direction and facing the connecting plate. The outer side of the vertical side abuts against the inner side of the vertical reinforcement member and is fixedly connected to the vertical reinforcement member. After the first working area is constructed, the first plate and the extension plate are separated and the first plate is removed, so that the excavator can perform excavation operations on the connecting plate for the second working area.

6. The rectangular shield tunnel working shaft as described in claim 5, characterized in that: The bottom of the extended substrate is provided with connecting posts in a vertical direction. At least four sets of connecting posts are provided and are symmetrically arranged on the left and right sides of the substrate. The top of the connecting posts abuts against the bottom of the extended substrate, and the bottom of the connecting posts abuts against the bottom wall of the second working area.

7. A rectangular shield tunnel working shaft as described in claim 5, characterized in that: The top of the connecting substrate has an upward protrusion, and the tops of the expansion substrate and the fixing substrate are respectively provided with a first detection surface and a second detection surface. By detecting the vertical distance between the protrusion and the first detection surface or the second detection surface, it is determined whether the connecting substrate, the expansion substrate and the fixing substrate are installed in the vertical direction.

8. A rectangular shield tunnel working shaft as described in claim 5, characterized in that: The substrate includes a replacement substrate. After the excavation of the foundation pit in the second working area is completed, the replacement substrate is adapted to be installed between the second substrates on the left and right sides. The distance between the replacement substrates in the left and right direction is L1, and the distance between the first substrates in the left and right direction is L2, satisfying L1 < L2.

9. A rectangular shield tunnel working shaft as described in claim 8, characterized in that: The replacement substrate has a personnel entrance / exit, which connects the first work area and the second work area.

10. A rectangular shield tunnel working shaft as described in claim 1, characterized in that: A steel reinforcement layer is laid on the substrate, and the steel reinforcement layer is adapted to form a reinforced concrete layer.

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