CN216765977U - Sinking construction device for assembled underground building - Google Patents

Abstract

The utility model discloses a sinking construction device for an assembled underground building, which relates to the technical field of underground building construction, wherein the building comprises an outer wall, a top plate, a bottom plate and a construction device, the construction device comprises an assembling device, an excavating device and a hanging device positioned at the top of the building, the excavating device comprises an outer wall excavating device and a bottom plate excavating device, the outer wall excavating device and the bottom plate excavating device comprise chain cutter excavating devices, and each chain cutter excavating device comprises a chain cutter and a driving device; the chain cutter comprises an outer wall chain cutter in an outer wall excavating device and a bottom plate chain cutter in a bottom plate excavating device, the driving device comprises an outer wall driving device and a bottom plate driving device, the outer wall driving device is installed above an outer wall, the outer wall chain cutter is enveloped with the outer wall from the top of a sunken part of a building, and the bottom plate chain cutter is enveloped with the bottom plate; the longitudinal wall comprises an upper hole and a lower hole, the upper hole is staggered up and down, the upper hole is located above the bottom plate, the lower hole is close to the lower part of the bottom plate, and the bottom plate chain cutter is wrapped on the bottom plate through the upper hole and the lower hole.

Description

Sinking construction device for assembled underground building

Technical Field

The utility model relates to the technical field of underground building construction, in particular to a sinking construction device for an assembly type underground building.

Background

The existing large-scale underground building is constructed by an open cut method commonly used, the open cut method needs to firstly cut a foundation pit for supporting, then pour or assemble the underground building in the foundation pit, needs to make temporary supporting and precipitation of the foundation pit, and has long construction period and high construction cost; at present, the chain cutter is adopted to excavate bottom rock soil, the whole sinking technical scheme, and the sinking construction device without a hanging device has the following defects because the self load of an underground building is too heavy: the inclination and the deviation are easy to generate, a deviation rectifying device is needed to be additionally arranged when the device sinks, and once deviation is generated, the deviation rectification is difficult to realize; the large load is pressed on the bottom chain cutter, so that the power of the driving device is too large, and the chain cutter is easy to break; the descent speed is difficult to control; the feed amount of the bottom chain cutter is in an out-of-control state, so that the cutter is easily damaged.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, it is an object of the present invention to provide a sinking construction apparatus for a fabricated underground structure, which solves the above-mentioned problems in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the underground building comprises an outer wall, a top plate, a bottom plate and a construction device, wherein the outer wall comprises a longitudinal wall and a transverse wall, the construction device comprises an assembling device, an excavating device and a hanging device positioned at the top of the building, the excavating device comprises an outer wall excavating device and a bottom plate excavating device, the outer wall excavating device excavates rock soil at the bottom of the outer wall, the bottom plate excavating device excavates rock soil at the bottom of the bottom plate, the outer wall excavating device and the bottom plate excavating device comprise chain cutter excavating devices, each chain cutter excavating device comprises a chain cutter and a driving device, and each chain cutter comprises a chain and a cutter arranged on the chain; the chain cutter comprises an outer wall chain cutter in the outer wall excavating device and a bottom plate chain cutter in the bottom plate excavating device, the bottom plate chain cutter is transversely arranged and forms an angle with the longitudinal wall chain cutter, the driving device comprises an outer wall driving device and a bottom plate driving device, the outer wall driving device is installed above the outer wall, the bottom plate driving device is installed above the bottom plate, the outer wall chain cutter envelopes the outer wall from the top of a sinking part of the building, and the bottom plate chain cutter envelopes the bottom plate; the longitudinal wall comprises an upper hole and a lower hole, the upper hole is positioned above the bottom plate, the lower hole is close to the lower part of the bottom plate, the bottom plate chain cutter envelopes the bottom plate through the upper hole and the lower hole, the longitudinal wall comprises a lower longitudinal wall positioned below the bottom plate, a middle longitudinal wall between the upper hole and the lower hole and an upper longitudinal wall above the upper hole, the thickness of the middle longitudinal wall is smaller than or equal to the thickness difference of the lower longitudinal wall minus the thickness of the chain cutter, and the thickness of the upper longitudinal wall is smaller than or equal to the thickness of the lower longitudinal wall; the building is constructed on the ground in the full length mode through the construction device, the hanging device enables the building to be in a hanging state, the driving device is started, chain cutters at the bottoms of the outer wall and the bottom plate dig rock soil, the chain cutters running from bottom to top bring the dug rock soil to the top, sinking operation of the building is achieved, the building sinks to a set depth, the chain cutters are drawn out, follow-up construction is completed, and the whole construction of the building is completed.

As a further scheme of the utility model: the assembly device comprises a tensioning device, and the building comprises a plurality of bottom plate modules, a middle plate module, a top plate module, a side wall module and an end wall module.

As a further scheme of the utility model: the lower hole in the longitudinal wall comprises an inlet blade plate, and when the bottom plate chain cutter carries rock soil larger than the gap between the lower hole and the bottom plate chain cutter, the rock soil is crushed through the inlet blade plate.

As a further scheme of the utility model: the building sinks to a set depth, and when the buoyancy of underground water to the building and the friction of rock soil to the building are equal to the dead weight of the building including the excavating device, the building is in a critical state, and the building is always in a suspension state in the sinking process by weighting the building.

As a further scheme of the utility model: the chain sword include the link joint, the link joint is installed on the chain, the sword is installed on the link joint, the chain sword comprises a plurality of groups strip chain sword that is the taper, sword among the strip chain sword is including the head sword that is located the front end, the middle sword that is located the centre and the scraper blade that is located the tail end, the head sword includes a long sword, middle sword includes two short knives, the height that highly is less than head sword and middle sword of scraper blade, head sword and middle sword excavate the ground, the ground that the scraper blade will excavate is taken to the place ahead.

As a further scheme of the utility model: the hanging device comprises a steel strand lifting jack, and a plurality of steel strand lifting jacks synchronously and slowly lift.

As a further scheme of the utility model: when the chain cutter excavates rock soil, different geological conditions are met by controlling the descending speed of the hanging device, and the chain cutter is replaced inside a building.

As a further scheme of the utility model: when the chain cutter is used for excavating rock and soil, different geological conditions are met by controlling the descending speed of the hanging device, and when the chain cutter is worn, the chain cutter is replaced at the top.

As a further scheme of the utility model: the bottom plate excavating device comprises a hydraulic flushing device and a hydraulic unearthing device, excavated rock soil is separated from the chain cutter through the hydraulic flushing device, and the mud-water mixture separated from the chain cutter is sent out through the hydraulic unearthing device.

As a further scheme of the utility model: the building can be assembled and sunk in a sectional mode in the height direction, and in initial sinking construction of the building, buoyancy is generated through water filling so as to balance the weight of the building in a suspended state.

In conclusion, the chain cutter adopting the excavating device circulates at the bottom of the building, the chain cutter does not need to run to the top, and the utility model has the following advantages: the top of the hanging device is not provided with an enveloping chain cutter, so that the hanging device can be used for conveniently hanging a building; particularly, when the construction is performed in a sectional manner in the height direction, the assembly operation can be directly performed on the upper part of the building without disconnecting the chain cutter and removing the driving device.

According to the scheme, the bottom component is cast in situ, so that the strength and integrity of the bottom structure are improved, the upper part adopts an assembly type structure, the construction speed of building ground construction is improved, and the environment of a construction site can be improved through modular assembly construction.

The scheme of the utility model adopts the hanging device, the dead weight of the underground building is balanced by the hanging device, and the utility model has the following advantages: because the underground building is extremely heavy and cannot deviate, a deviation rectifying device is not needed; the dead weight of the underground building is not pressed on the chain cutter, so that the power of the driving device is small, the tension of the chain is small, and the chain is not easy to break; the descending speed is controllable; different geological conditions can be adapted by controlling the amount of feed.

Drawings

Fig. 1 is a schematic structural view of a building 1 starting sinking construction with the aid of a construction device 3, and is also a schematic structural view of a floor chain cutter 7B of the building 1 hiding a transverse wall 2Y and exposing an interior return;

fig. 2 is a schematic structural diagram of a bottom plate chain cutter 7B enveloping the whole bottom plate 12 through an upper hole 2XA and a lower hole 2XB, and an outer wall chain cutter 7A enveloping an outer wall 2 from the top of a sunken part of the building 1;

fig. 3 is a schematic structural diagram of a floor module 1A hoisted by four sets of steel strand lifting jacks 31A of each two sets of hoisting devices 31, wherein the hoisting devices 31 are provided with traveling wheels to move on a portal frame along the longitudinal direction;

fig. 4 is a schematic structural diagram of the lower hole 2XB, and the inlet blade plate 2XB1 is a metal plate provided above the lower hole 2XB passing through the chain cutter 7, and has a cutting edge capable of crushing the rock brought by the chain cutter 7B of the bottom plate;

fig. 5 is a schematic structural diagram of the tensioning device 41 for integrally connecting the bottom plate modules 1A by adopting a tensioning method;

fig. 6 is a schematic structural view of the floor module 1A placed on the ground by the steel strand lifting jack 31A;

FIG. 7 shows that the assembling device 4 hoists the side wall module 1D and the end wall module 1E through the hanging device 31, and the side wall module 1D and the end wall module 1E are all connected and fixed through a bolt and nut pair;

fig. 8 is a schematic structural diagram of the hanging device 31 suspending all the middle plate modules 1B, inserting steel strands, and tensioning and anchoring;

fig. 9 is a schematic structural diagram of the middle plate module 1B, the side wall module 1D and the end wall module 1E connected integrally by bolts and nuts;

fig. 10 is a schematic structural view showing that all roof modules 1C are suspended by the suspending device 31, and the steel strands are inserted and tensioned for anchoring;

FIG. 11 is a schematic structural view of the bottom side wall module 1D and the top end wall module 1E integrally connected with the bottom of the top plate module 1C by bolt and nut pairs;

fig. 12 is a schematic view of a part i of fig. 11 enlarged, and is also a schematic view of a structure in which the middle plate module 1B is placed on the bottom-layer side wall module 1D and is fixedly connected through a bolt-nut pair, and a concave-convex embedded interface is arranged in the middle to increase the connection strength and the waterproof effect;

fig. 13 is a schematic view of the structure of the excavating device 5 mounted on the assembled building 1;

fig. 14 is a schematic view of the structure of the chain knife 7 composed of two chains 71, and is also a schematic view of the structure of the chain plate 73 mounted on the chain 71, and the knife 72 mounted on the chain plate 73;

fig. 15 is a schematic structural view of the strip-shaped chain cutter 8;

FIG. 1 is a building; 2 is an outer wall; 11 is a top plate; 12 is a base plate; 1A a backplane module; 1B middle plate module; 1C top plate module; 1D, a side wall module; 1E end wall module; 2X is a vertical wall; 2X-1 is an upper hole staggered up and down; 2X-2 is a lower hole staggered up and down; 2X1 is lower vertical wall; 2X2 is upper vertical wall; 2Y is a transverse wall; 2XA is an upper hole which is staggered up and down; 2XB is a lower hole staggered up and down; 2XB1 is the inlet edge plate; 2X1 is lower vertical wall; 2X2 is middle vertical wall; 2X3 is upper vertical wall; 3 is a construction device; 31 is a hanging device; 31A is a steel strand lifting jack; 4 is an assembly device; 5 is an excavating device; 51 is an outer wall excavating device; 52 is a floor excavation means; 6 is a chain cutter excavating device; 61 is a driving device; 7 is a chain cutter; 7A is an outer wall chain cutter; 7B is a bottom plate chain cutter; 71 is a chain; 72 is a knife; 8 is a strip chain cutter; 81 is a head knife; 82 is the middle knife in the middle; 83 is a flight at the trailing end.

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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1 to 15, in the embodiment of the present invention, an underground building 1 includes an outer wall 2, a top plate 11, a bottom plate 12 and a construction device 3, the outer wall 2 includes a longitudinal wall 2X and a transverse wall 2Y, the construction device 3 includes an assembling device 4, an excavating device 5 and a hanging device 31 located at the top of the building 1, the excavating device 5 includes an outer wall excavating device 51 and a bottom plate excavating device 52, the outer wall excavating device 51 excavates rock soil at the bottom of the outer wall 2, the bottom plate excavating device 52 excavates rock soil at the bottom of the bottom plate 12, the outer wall excavating device 51 and the bottom plate excavating device 52 include a chain cutter excavating device 6, the chain cutter excavating device 6 includes a chain cutter 7 and a driving device 61, the chain cutter 7 includes a chain 71 and a cutter 72 mounted on the chain 71; the chain cutter 7 comprises an outer wall chain cutter 7A in the outer wall excavating device 51 and a bottom plate chain cutter 7B in the bottom plate excavating device 52, the bottom plate chain cutter 7B is transversely arranged and forms an angle of 90 degrees with the longitudinal wall chain cutter 71X, the driving device 61 comprises an outer wall driving device 611 and a bottom plate driving device 612, the outer wall driving device 611 is installed above the outer wall 2, the bottom plate driving device 612 is installed above the bottom plate 12, the outer wall chain cutter 7A envelopes the outer wall 2 from the top of the sinking part of the building 1, and the bottom plate chain cutter 7B envelopes the bottom plate 12; the vertical wall 2X comprises an upper hole 2XA and a lower hole 2XB which are staggered up and down, the upper hole 2XA is positioned above the bottom plate 12, the lower hole 2XB is next to the lower part of the bottom plate 12, the bottom plate chain cutter 7B envelopes the bottom plate 12 through the upper hole 2XA and the lower hole 2XB, the vertical wall 2X comprises a lower vertical wall 2X1 positioned below the bottom plate 12, a middle vertical wall 2X2 between the upper hole 2XA and the lower hole 2XB and an upper vertical wall 2X3 positioned above the upper hole 2XA, the thickness of the middle vertical wall 2X2 is smaller than or equal to the difference of the thicknesses of the lower vertical wall 2X1 and the chain cutter 7, and the thickness of the upper vertical wall 2X3 is smaller than or equal to the thickness of the lower vertical wall 2X 1; the building 1 is constructed on the ground in a full-length mode through the construction device 3, the building 1 is in a suspended state through the hanging device 31, the driving device 61 is started, the chain cutters 7 at the bottoms of the outer wall 2 and the bottom plate 12 dig the rock soil, the excavated rock soil is brought to the upper side by the chain cutters 7 which run from bottom to top, sinking operation of the building 1 is achieved, the building 1 sinks to a set depth, the chain cutters 7 are drawn out, and subsequent construction is completed until all construction of the building 1 is completed.

It should be noted that: a cover plate is arranged on the outer side of the longitudinal wall 2X between the lower hole 2XB and the upper hole 2XA to cover the bottom plate chain cutter 7B, so that unnecessary disturbance of rock soil on the outer side of the longitudinal wall 2X caused by the running bottom plate chain cutter 7B is prevented.

As shown in fig. 4 to 13, the assembling device 4 includes a tensioning device 41, the building 1 includes a plurality of bottom plate modules 1A, middle plate modules 1B, top plate modules 1C, side wall modules 1D, and end wall modules 1E, and the main assembling steps are as follows:

1) firstly, all the bottom plate modules 1A are in a suspension state through the hanging device 31, the bottom plate modules 1A are connected into a whole through the tensioning device 41 by adopting a tensioning method, and the bottom plate modules 1A are placed on the ground;

2) then, the side wall modules 1D, the end wall modules 1E, the side wall modules 1D and the end wall modules 1E, the bottom plate module 1A and the side wall modules 1D, and the bottom plate module 1A and the end wall modules 1E on the bottom layer are connected into a whole by using a bolt and nut pair through an assembling device 4;

3) all the middle plate modules 1B are in a suspended state through the hanging device 31, the middle plate modules 1B are connected into a whole through the tensioning device 41 by adopting a tensioning method, the middle plate modules 1B are placed at the tops of the side wall modules 1D and the end wall modules 1E at the bottom layer, and the tops of the side wall modules 1D and the end wall modules 1E at the bottom layer are connected into a whole with the bottom of the middle plate modules 1B through bolt and nut pairs;

4) completing the construction of all the middle layers except the top plate;

5) all the top plate modules 1C are in a suspended state through the hanging device 31, the top plate modules 1C are connected into a whole through the tensioning device 41 by adopting a tensioning method, the top plate modules 1C are placed at the tops of the top side wall modules 1D and the end wall modules 1E, the tops of the bottom side wall modules 1D and the end wall modules 1E are connected into a whole with the bottom of the middle plate module 1B through bolt and nut pairs, and then the assembly of the building 1 is completed;

6) the hanging device 31 keeps the building 1 in a hanging state, the building 1 is driven to complete sinking construction through the digging device 5, and the chain cutter 7 is pulled out to be grouted until all construction is completed.

It should be noted that: the bottom plate module 1A, the middle plate module 1B and the top plate module 1C can also be connected by bolt and nut pairs without using a stretching method or using a mixture of the two.

The lower hole 2XB in said longitudinal wall 2X comprises an inlet blade 2XB1 which is crushed by the inlet blade 2XB1 when the bottom plate chain cutter 7B carries rock soil which is larger than the gap between the lower hole 2XB and the bottom plate chain cutter 7B.

The building 1 sinks to a set depth, and is in a critical state when the buoyancy of underground water to the building 1 and the friction of rock soil to the building 1 are equal to the self weight of the building 1 including the excavating device 5, and the building 1 is always in a suspended state in the process of sinking by adding weight to the building 1, for example, pouring water into the building 1.

It should be noted that: the upper hole 2XA may be set at a specific height to generate buoyancy to the bottom of the building 1 during sinking; the building 1 can be assembled and sunk in a sectional manner in the height direction, and the building 1 generates buoyancy by filling water in the initial sinking construction so as to balance the weight of the building 1 in a suspended state.

The chain cutter 7 comprises a chain plate 73, the chain plate 73 is arranged on a chain 71, the cutters 72 are arranged on the chain plate 73, the chain cutter 7 consists of a plurality of groups of tapered strip chain cutters 8, the cutters 72 in the strip chain cutters 8 comprise a head cutter 81 positioned at the front end, a middle cutter 82 positioned in the middle and a scraper 83 positioned at the tail end, the head cutter 81 comprises a long cutter 811, the middle cutter 82 comprises two short cutters 821, the height of the scraper 83 is slightly lower than that of the head cutter 81 and the middle cutter 82, the head cutter 81 and the middle cutter 82 excavate rock soil, and the scraper 83 brings the excavated rock soil to the front; assuming that the width of each set of chain blades is B, the pitch of the chain is T, there are n middle blades 82, and the length of the short blade 821 is a, the length of the long blade 811 is 2a, B =2 (n + 1) a, and the length of each set of strip-shaped chain blades 8 is equal to (n + 2) T, so that the length of the upper blade 72 of each link plate 73 is equal.

Hanging device 31 include a plurality of steel strand wires lifting jack 31A, steel strand wires lifting jack 31A goes up and down slowly in step, steel strand wires lifting jack 31A adopts cross core formula structure hydraulic pressure lifting mechanism as the elevating gear, the wedge ground tackle at hydraulic pressure lifting mechanism both ends has one-way auto-lock effect, when ground tackle work is tight, can automatic locking steel strand wires, when the ground tackle is out of work pine, release the steel strand wires, the steel strand wires can move about from top to bottom, can make building 1 wholly sink under the suspension state in step, because its self huge dead weight, be difficult to produce the skew, need not set up other deviation correcting device.

When the chain cutter 7 excavates the rock soil, different geological conditions are met by controlling the descending speed of the hanging device 31, the chain cutter is replaced in the building 1, and when cobblestones and boulders are encountered, the cobblestones and the boulders are scraped by the cutter (72) at the extremely slow descending speed; when the chain cutter 7 excavates rock soil, different geological conditions are met by controlling the descending speed of the hanging device 31, and when the cutter 72 is worn, the cutter is replaced at the top.

As shown in fig. 13, the floor excavating device 52 includes a hydraulic flushing device 521 and a hydraulic unearthing device 522, the excavated soil and soil are separated from the chain cutter 7 by the hydraulic flushing device 521, and the mud and water mixture separated from the chain cutter 7 is discharged by the hydraulic unearthing device 522.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for the convenience of description of the present invention and for simplicity of description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the present invention should not be construed as being limited thereto, and it should be noted that the terms "mounted" and "connected" should be interpreted broadly, for example, as being able to be fixedly connected, detachably connected, or integrally formed, mechanically connected or indirectly connected through an intermediate, and the specific meaning of the terms in the utility model can be understood through specific situations.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A sinking construction device for an assembly type underground building is characterized in that the underground building (1) comprises an outer wall (2), a top plate (11), a bottom plate (12) and a construction device (3), the outer wall (2) comprises a longitudinal wall (2X) and a transverse wall (2Y), the construction device (3) comprises an assembly device (4), an excavating device (5) and a hanging device (31) positioned at the top of the building (1), the excavating device (5) comprises an outer wall excavating device (51) and a bottom plate excavating device (52), the outer wall excavating device (51) excavates rock soil at the bottom of the outer wall (2), the bottom plate excavating device (52) excavates rock soil at the bottom of the bottom plate (12), the outer wall excavating device (51) and the bottom plate excavating device (52) comprise a chain cutter excavating device (6), the chain cutter excavating device (6) comprises a chain cutter (7) and a driving device (61), the chain knife (7) comprises a chain (71) and a knife (72) arranged on the chain (71); the chain cutter (7) comprises an outer wall chain cutter (7A) in an outer wall excavating device (51) and a bottom plate chain cutter (7B) in a bottom plate excavating device (52), the bottom plate chain cutter (7B) is transversely arranged and forms an angle of 90 degrees with a longitudinal wall chain cutter (71X), the driving device (61) comprises an outer wall driving device (611) and a bottom plate driving device (612), the outer wall driving device (611) is installed above the outer wall (2), the bottom plate driving device (612) is installed above the bottom plate (12), the top of a sinking part of the outer wall chain cutter (7A) from a building (1) is enveloped with the outer wall (2), and the bottom plate chain cutter (7B) is enveloped with the bottom plate (12); the vertical wall (2X) comprises an upper hole (2 XA) and a lower hole (2 XB), the upper hole (2 XA) is located above the bottom plate (12), the lower hole (2 XB) is close to the lower side of the bottom plate (12), the bottom plate chain cutter (7B) envelopes the bottom plate (12) through the upper hole (2 XA) and the lower hole (2 XB), the vertical wall (2X) comprises a lower vertical wall (2X 1) located below the bottom plate (12), a middle vertical wall (2X 2) between the upper hole (2 XA) and the lower hole (2 XB) and an upper vertical wall (2X 3) above the upper hole (2 XA), the thickness of the middle vertical wall (2X 2) is smaller than or equal to the difference between the thicknesses of the chain reducing cutters (7) of the lower vertical wall (2X 1), and the thickness of the upper vertical wall (2X 3) is smaller than or equal to the thickness of the lower vertical wall (2X 1); the building (1) is constructed by installing the construction device (3) on the whole length of the ground, and the building (1) is suspended by the hanging device (31).

2. A sinking construction unit for an assembled underground building according to claim 1, C h a r a C t E r i z E D in that the assembly means (4) comprise tensioning means (41), and that the building (1) comprises a number of floor modules (1A), middle plate modules (1B), roof modules (1C), side wall modules (1D) and end wall modules (1E).

3. A sinking construction unit for an assembled underground building according to claim 2, wherein the lower hole (2 XB) of the longitudinal wall (2X) includes an entrance blade (2 XB 1) crushed by the entrance blade (2 XB 1) when the bottom plate chain cutter (7B) carries rock soil larger than a gap between the lower hole (2 XB) and the bottom plate chain cutter (7B).

4. A sinking construction unit for an assembled underground structure according to claim 3, wherein the structure (1) is sunk to a predetermined depth, and is in a critical state when buoyancy of underground water to the structure (1) and friction of rock soil to the structure (1) are equal to the self weight of the structure (1) including the excavating unit (5), and the structure (1) is always in a suspended state during sinking by applying weight to the structure (1).

5. A sinking construction unit for an assembled underground building according to claim 4, wherein the chain cutters (7) comprise chain plates (73), the chain plates (73) are mounted on the chain (71), the cutters (72) are mounted on the chain plates (73), the chain cutters (7) are composed of a plurality of sets of tapered strip chain cutters (8), the cutters (72) of the strip chain cutters (8) comprise head cutters (81) at the front end, middle cutters (82) at the middle end and scrapers (83) at the rear end, the head cutters (81) comprise a long cutter (811), the middle cutters (82) comprise two short cutters (821), the scrapers (83) have a height slightly lower than the height of the head cutters (81) and the middle cutters (82), the head cutters (81) and the middle cutters (82) excavate, and the scrapers (83) bring excavated rock to the front.

6. A sinking construction unit for an assembled underground structure according to claim 5, wherein the suspending means (31) comprises a plurality of wire lifting jacks (31A) and the plurality of wire lifting jacks (31A) are synchronously and slowly lifted.

7. A sinking construction unit for an assembled underground structure according to claim 6, wherein the chain cutter (7) is changed inside the structure (1) by controlling the descending speed of the hanging means (31) to satisfy different geological conditions when excavating the soil.

8. A sinking construction unit for an assembled underground structure according to claim 7, wherein the chain cutter (7) is adapted to meet different geological conditions by controlling a descending speed of the hanger (31) when excavating the soil, and is replaced at the top when the cutter (72) is worn.

9. A sinking construction unit for an assembled underground structure according to claim 8, wherein the floor excavating means (52) comprises a hydraulic flushing means (521) and a hydraulic unearthing means (522), the excavated soil is separated from the chain cutter (7) by the hydraulic flushing means (521), and the muddy water mixture separated from the chain cutter (7) is discharged by the hydraulic unearthing means (522).

10. The sinking construction equipment for the fabricated underground building as claimed in claim 8, wherein the building (1) can be assembled and sunk in a height direction in stages, and the building (1) is constructed in an initial sinking stage by generating buoyancy by filling water to balance the weight of the building (1) itself in a suspended state.

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