CN216765975U - Sinking construction device for cast-in-place underground building - Google Patents

Abstract

The utility model discloses a sinking construction device for a cast-in-place underground building, which relates to the technical field of underground building construction, wherein the underground building comprises an outer wall, a top plate, a bottom plate and a construction device, and consists of end sections positioned at two ends and a middle section positioned in the middle, wherein each end section comprises a transverse wall positioned at the end part and two longitudinal walls positioned at two sides; the construction device comprises an excavating device, a hanging device and a pouring device, wherein the hanging device and the pouring device are positioned at the top of a building; the driving device is arranged above the bottom plate; the longitudinal wall comprises holes which are positioned above the bottom plate and staggered up and down, the chain cutters wrap the bottom plate through the holes, the building is poured on the ground in a segmented mode according to the length direction through the pouring device, the building is in a hanging state through the hanging device, the driving device is started, the chain cutters at the bottom of the bottom plate excavate the rock soil, the excavated rock soil is brought to the upper side through the chain cutters which run from bottom to top, and sinking operation of the building is achieved.

Description

Sinking construction device for cast-in-place underground building

Technical Field

The utility model relates to the technical field of underground building construction, in particular to a sinking construction device for a cast-in-place 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 open a foundation pit for supporting, then the underground building is poured or assembled in the foundation pit, the bottom rock soil is excavated by adopting a chain cutter at present, the whole sinking technical scheme is adopted, and a sinking construction device without a hanging device has the following defects because the load of the underground building is too heavy: the inclination and the deviation are easy to generate, a deviation rectifying device needs to be additionally arranged when the device sinks, and once the 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 cutter feeding amount of the bottom chain cutter is out of control, so that the cutter is easily damaged; to this end we propose a sinking construction device for cast-in-place underground buildings to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a sinking construction apparatus for a cast-in-place type underground structure, which solves the above problems occurring in the prior 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, and consists of end sections positioned at two ends and a middle section positioned in the middle, wherein the outer wall comprises longitudinal walls and transverse walls, the end sections comprise the transverse walls positioned at the end parts and two longitudinal walls positioned at two sides, and the middle section comprises the longitudinal walls positioned at two sides; the construction device comprises an excavating device, a hanging device and a pouring device, wherein the hanging device and the pouring device are positioned at the top of a building; the driving device is arranged above the bottom plate; the longitudinal wall comprises holes which are positioned above the bottom plate and staggered up and down, the chain cutter envelopes the bottom plate through the holes, the longitudinal wall comprises a lower longitudinal wall positioned below the holes and an upper longitudinal wall positioned above the holes, and the thickness of the upper longitudinal wall is less than or equal to the sum of the thicknesses of the lower longitudinal wall and the chain cutter; the building is poured on the ground in a segmented mode in the length direction through the pouring device, the hanging device is used for enabling the building to be in a hanging state, the driving device is started, the chain cutter at the bottom of the bottom plate excavates rock soil, the chain cutter running from bottom to top brings the excavated rock soil to the top, sinking operation of the building is achieved, the building sinks to a set depth, the chain cutter is pulled out, follow-up construction is completed, and the whole construction of the building is completed.

The entrance of the hole comprises a blade plate and an inclined plane, and when the chain cutter carries rock soil larger than the gap between the hole and the chain cutter, the rock soil is crushed by the entrance blade plate or extruded to the outer side of the longitudinal wall by the inclined plane.

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.

The chain knife comprises a chain plate, the chain plate is arranged on the chain, and the knife is arranged on the chain plate.

The chain cutter comprises a plurality of groups of tapered strip chain cutters, the cutters in the strip chain cutters comprise head cutters positioned at the front ends, middle cutters positioned in the middle and scraping plates positioned at the tail ends, the head cutters comprise long cutters, the middle cutters comprise two short cutters, the height of the scraping plates is slightly lower than that of the head cutters and the middle cutters, the head cutters and the middle cutters excavate rock soil, and the excavated rock soil is brought to the front by the scraping plates.

The hanging device comprises steel strand lifting jacks, the steel strand lifting jacks synchronously and slowly lift, and the building sinks under the hanging state and is difficult to deviate due to the huge dead weight of the building.

When the chain cutter excavates rock 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 inside a building.

The building comprises end sections, middle sections and interfaces connected between the adjacent middle sections, wherein the interfaces comprise a first-sinking wide interface and a second-sinking narrow interface, the wide interfaces and the narrow interfaces are respectively positioned at the left end and the right end of the adjacent two sections, each end section comprises an end structure body and an end interface positioned at one end, and the middle section comprises a left interface, a middle structure body and a right interface; the excavating device comprises an interface excavating device, the interface excavating device comprises a wide interface excavating device and a narrow interface excavating device, the wide interface excavating device excavates rock soil at the bottom of a wide interface, the narrow interface excavating device excavates rock soil at the bottom of a narrow interface, a chain cutter in the wide interface excavating device envelopes a wide interface, and a chain cutter in the narrow interface excavating device envelopes a narrow interface.

The interface include no bottom plate interface, the wide interface of no bottom plate interface includes the narrow outer wall of U type and vertical outer wall, vertical outer wall includes vertical recess, wide interface excavating gear includes mutually perpendicular narrow outer wall chain sword of U type and vertical outer wall chain sword, the rock soil of the narrow outer wall bottom of U type is excavated to the narrow outer wall chain sword of U type, vertical outer wall chain sword excavates the rock soil of the vertical outer wall bottom, the narrow interface of no bottom plate interface includes the U type outer wall, the U type outer wall includes U type boss, narrow interface excavating gear includes U type outer wall chain sword, the rock soil of U type outer wall bottom is excavated to U type outer wall chain sword, the U type outer wall chain sword that sinks after-sets up in the vertical recess that sinks earlier.

The interface comprises a bottom plate interface, the bottom plate wide interface with the bottom plate interface comprises a U-shaped wide outer wall, the inner side of the U-shaped wide outer wall comprises a U-shaped groove, the wide interface excavating device comprises a U-shaped wide outer wall chain cutter, and rock soil at the bottom of the U-shaped wide outer wall is excavated by the U-shaped wide outer wall chain cutter; the narrow interface with the bottom of the bottom plate interface comprises a U-shaped wall, the U-shaped wall comprises a boss, the narrow interface excavating device comprises a U-shaped outer wall chain cutter, rock soil at the bottom of the U-shaped outer wall is excavated, and the boss sinking backwards is embedded in the U-shaped groove sinking firstly.

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 chain cutter 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 construction body can be directly poured on the upper part of the building without disconnecting the chain cutter and dismantling the driving device.

This technique has adopted cable suspension device, and underground building's dead weight is balanced by cable suspension device, has following advantage: 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 another intermediate section 11 being constructed by the construction device 3 after one end section 4 and one intermediate section 11 have been sunk to the set position;

fig. 2 is a schematic structural view of a chain cutter 7 of the digging device 5 wrapping a horizontal projection plane of a middle section 11;

FIG. 3 is a schematic structural diagram of the middle section 11, wherein the wide interface excavating device 511 excavates the bottom rock soil of the wide interface 9-1, and the narrow interface excavating device 512 excavates the bottom rock soil of the narrow interface 9-2;

fig. 4 is a schematic structural view of a casting device 6 for casting the main structure of the building 1 in situ through a concrete casting device and a formwork;

FIG. 5 is a schematic view of the structure in which link plate 7-3 of chain knife 7 is mounted on chain 7-1, and knife 7-2 is mounted on link plate 7-3;

fig. 6 is a schematic structural view of the strip-shaped chain cutter 8;

FIG. 7 is a schematic structural diagram of the end segment 4 and the intermediate segment 11 and the adjacent intermediate segment 11 connected together by the interface 9, and is also a schematic structural diagram of the narrow interface 9-2 sinking back into the wide interface 9-1 sinking first;

FIG. 8 is a schematic structural diagram of a bottomless wide port 91-1 having a bottomless board port 91 at the left end and a bottomless narrow port 91-2 having a bottomless board port 91 at the right end of the middle section 11;

FIG. 9 is a schematic structural diagram of a U-shaped narrow outer wall chain cutter 7-511Y excavating bottom rock soil of the U-shaped narrow outer wall 91-1-1 and a vertical outer wall chain cutter 7-511X excavating bottom rock soil of the vertical outer wall 91-1-2;

FIG. 10 is a schematic structural diagram of U-shaped wide outer wall chain cutter 7-521Y excavating bottom rock soil of U-shaped wide outer wall 92-1-1 and U-shaped outer wall chain cutter 7-512Y excavating bottom rock soil of U-shaped wall 92-2-1;

FIG. 1 is a building; 2 is an outer wall; 2X is a vertical wall; 2X-1 is a hole which is positioned above the bottom plate 1-2 and staggered up and down; 2X1 is lower vertical wall; 2X2 is upper vertical wall; 2Y is a transverse wall; 1-1 is a top plate; 1-2 is a base plate; 2X-1 is a hole, and the inlet comprises a blade plate 2X-1-1 and an inclined plane 2X-1-2; 2X-1-1 is a blade plate; 2X-1-2 is a bevel; 3 is a construction device; 3-1 is a hanging device; 3-1A is a steel strand lifting jack; 4 is an end section comprising an end structure 4-1 and an end interface 4-2 at one end; 5 is an excavating device; 5-1 is a driving device; 51 is an interface excavation device; 511 is a wide interface excavating device; 512 is a narrow interface excavating device; 6, a pouring device; 7 is a chain knife, comprising a chain 7-1 and a knife 7-2 arranged on the chain 7-1; 7-511Y is a U-shaped narrow outer wall chain cutter; 7-511X is a vertical wall chain cutter; 7-512Y is a U-shaped outer wall chain cutter; 7-521Y is a U-shaped wide outer wall chain cutter; 8 is a strip chain cutter; 8-1 is a front end head knife; 8-1-1 is a long knife; 8-2 is a middle knife; 8-2-1 is a short knife; 8-3 is a scraper at the tail end; 9 is an interface, comprising a first sinking wide interface 9-1 and a second sinking narrow interface 9-2; 9-1 is a digging wide interface; 9-2 is a narrow interface; 91 is a bottomless interface; 91-1 is a bottomless wide interface, comprising a U-shaped narrow outer wall 91-1-1 and a vertical outer wall 91-1-2; 91-1-1 is a U-shaped narrow outer wall; 91-1-2 is a vertical exterior wall; 91-1-2-1 is a vertical groove; 91-2 is a bottomless narrow interface; 91-2-1 is a U-shaped outer wall; 91-2-1-1 is a U-shaped boss; 92 is a backplane interface; 92-1 is a wide interface with a bottom; 92-1-1 is a U-shaped wide outer wall; 92-1-1-1 is a U-shaped groove; 92-2 is a bottomed narrow interface; 92-2-1 is a U-shaped wall; 92-2-1-1 is a boss; 11 is a middle section and comprises a left connector 11-1, a middle structural body 11-2 and a right connector 11-3; 11-1 is a left interface; 11-2 is an intermediate structure; 11-3 is the right interface.

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 10, in the embodiment of the present invention, an underground building 1 includes an outer wall 2, a top plate 1-1, a bottom plate 1-2, and a construction device 3, and is composed of end sections 4 located at two ends and a middle section 11 located in the middle, the outer wall 2 includes longitudinal walls 2X and transverse walls 2Y, the end sections 4 include one transverse wall 2Y located at an end and two longitudinal walls 2X located at two sides, and the middle section 11 includes longitudinal walls 2X located at two sides; the construction device 3 comprises an excavating device 5, a hanging device 3-1 and a pouring device 6, wherein the hanging device 3-1 and the pouring device 6 are positioned at the top of the building 1, the excavating device 5 excavates rock soil at the bottom of the bottom plate 1-2, the excavating device 5 comprises a chain cutter 7 and a driving device 5-1, and the chain cutter 7 comprises a chain 7-1 and a cutter 7-2 arranged on the chain 7-1; the driving device 5-1 is arranged above the bottom plate 1-2; the vertical wall 2X comprises a hole 2X-1 which is positioned above the bottom plate 1-2 and staggered up and down, the chain cutter 7 envelopes the bottom plate 1-2 through the hole 2X-1, the vertical wall 2X comprises a lower vertical wall 2X1 positioned below the hole 2X-1 and an upper vertical wall 2X2 positioned above the hole 2X-1, and the thickness of the upper vertical wall 2X2 is less than or equal to the sum of the thickness of the lower vertical wall 2X1 and the thickness of the chain cutter 7; the building 1 is poured on the ground in sections according to the length direction or the height direction through the pouring device 6, the building 1 is in a suspended state through the hanging device 3-1, the driving device 5-1 is started, the chain cutter 7 at the bottom of the bottom plate 1-2 excavates rock soil, the excavated rock soil is brought to the upper side by the chain cutter 7 which runs from bottom to top, the sinking operation of the building 1 is realized, the building 1 sinks to a set depth, and the chain cutter 7 is pulled out to complete subsequent construction until all construction of the building 1 is completed.

It should be noted that: the hole 2X-1 can be set at a specific height, so that the bottom of the building 1 generates buoyancy in the sinking process; the building 1 can sink in sections in the height direction.

As shown in FIG. 8, the entrance of the hole 2X-1 includes a blade plate 2X-1-1 and an inclined surface 2X-1-2, and when the chain cutter 7 carries earth and soil such as cobblestones or boulders larger than the gap between the hole 2X-1 and the chain cutter 7, it is crushed by the entrance blade plate 2X-2-1 or crushed to the outside of the longitudinal wall 2X by the inclined surface 2X-1-2.

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.

As shown in fig. 5, the chain knife 7 comprises a chain plate 7-3, the chain plate 7-3 is mounted on the chain 7-1, and the knife 7-2 is mounted on the chain plate 7-3.

As shown in figure 6, the chain cutter 7 comprises a plurality of groups of conical strip chain cutters 8, the cutters 7-2 in the strip chain cutters 8 comprise head cutters 8-1 positioned at the front ends, middle cutters 8-2 positioned in the middle and scrapers 8-3 positioned at the tail ends, the head cutters 8-1 comprise long cutters 8-1-1, the middle cutters 8-2 comprise two short cutters 8-2-1, the height of the scrapers 8-3 is slightly lower than that of the head cutters 8-1 and the middle cutters 8-2, the head cutters 8-1 and the middle cutters 8-2 dig rock soil, and the scrapers 8-3 bring the dug rock soil to the front.

It should be noted that: the width of each group of chain knives is B, the pitch of the chain is T, n middle knives 8-2 are arranged, the length of each short knife 8-2-1 is a, the length of each long knife 8-1-1 is 2a, B =2n +1a, and the length of each group of strip-shaped chain knives 8 is equal to n +2T, so that the length of the upper knife 7-2 of each chain plate 7-3 is equal.

The hanging device 3-1 comprises a steel strand lifting jack 3-1A, the steel strand lifting jack 3-1A synchronously and slowly lifts, the steel strand lifting jack 3-1A adopts a core-penetrating structure hydraulic lifter as a lifting machine tool, wedge-shaped anchors at two ends of the hydraulic lifter have a one-way self-locking function, when the anchors work tightly, the steel strands can be automatically locked, when the anchors do not work loose, the steel strands are released, the steel strands can move up and down, the building 1 can be ensured to integrally and synchronously sink in a hanging state, and due to the huge dead weight of the steel strands, the steel strands are difficult to deviate, and other deviation rectifying devices are not required to be arranged.

When the chain cutter 7 excavates rock soil, different geological conditions are met by controlling the descending speed of the hanging device 3-1, and when the cutter 7-2 is worn, the cutter is replaced inside the building 1.

It should be noted that: when encountering cobblestones and boulders, the cobblestones and boulders are scraped with the knives 7-2 by an extremely slow descending speed.

The building 1 comprises an end section 4, a middle section 11 and interfaces 9 connected between the adjacent middle sections 11, wherein the interfaces 9 comprise a first-sinking wide interface 9-1 and a second-sinking narrow interface 9-2, the wide interface 9-1 and the narrow interface 9-2 are respectively positioned at the left end and the right end of the adjacent two sections, the end section 4 comprises an end structure body 4-1 and an end interface 4-2 positioned at one end, and the middle section 11 comprises a left interface 11-1, a middle structure body 11-2 and a right interface 11-3; the excavating device 5 comprises an interface excavating device 51, the interface excavating device 51 comprises a wide interface excavating device 511 and a narrow interface excavating device 512, the wide interface excavating device 511 excavates rock soil at the bottom of a wide interface 9-1, the narrow interface excavating device 512 excavates rock soil at the bottom of a narrow interface 9-2, a chain cutter 7 in the wide interface excavating device 511 envelopes the wide interface 9-1, and a chain cutter 7 in the narrow interface excavating device 512 envelopes the narrow interface 9-2.

It should be noted that: the end section 4 sinks first, the end interface 4-2 is a wide interface 9-1, and the end interface 4-2 sinks later, the end interface 4-2 is a narrow interface 9-2; the left interface 11-1 and the right interface 11-3 of the middle section 11 of the first sinking are both wide interfaces 9-1, the left interface 11-1 and the right interface 11-3 of the middle section 11 of the last sinking are both narrow interfaces 9-2, and the other one is a wide interface 9-1 and the other one is a narrow interface 9-2.

The interface 9 comprises a bottomless board interface 91, a bottomless wide interface 91-1 of the bottomless board interface 91 comprises a U-shaped narrow outer wall 91-1-1 and a vertical outer wall 91-1-2, the vertical outer wall 91-1-2 comprises a vertical groove 91-1-2-1, a wide interface excavating device 511 comprises a U-shaped narrow outer wall chain cutter 7-511Y and a vertical outer wall chain cutter 7-511X which are perpendicular to each other, the U-shaped narrow outer wall chain cutter 7-511Y excavates rock soil at the bottom of the U-shaped narrow outer wall 91-1-1, the vertical outer wall chain cutter 7-511X excavates rock soil at the bottom of the outer wall 91-1-2, a bottomless narrow interface 91-2 of the bottomless board interface 91 comprises a U-shaped outer wall 91-2-1, the U-shaped outer wall 91-2-1 comprises a U-shaped boss 91-2-1, the narrow-interface excavating device 512 comprises U-shaped outer wall chain cutters 7-512Y, wherein rock soil at the bottom of the U-shaped outer wall 91-2-1 is excavated by the U-shaped outer wall chain cutters 7-512Y, and a U-shaped boss 91-2-1-1 sinking backwards is embedded in a vertical groove 91-1-2-1 sinking firstly.

The interface 9 comprises a bottom plate interface 92, a bottom wide interface 92-1 of the bottom plate interface 92 comprises a U-shaped wide outer wall 92-1-1, the inner side of the U-shaped wide outer wall 92-1-1 comprises a U-shaped groove 92-1-1, a wide interface excavating device 511 comprises a U-shaped wide outer wall chain cutter 7-511Y, and the U-shaped wide outer wall chain cutter 7-521Y excavates rock soil at the bottom of the U-shaped wide outer wall 92-1-1; the narrow connector 92-2 with the bottom plate connector 92 comprises a U-shaped wall 92-2-1, the U-shaped wall 92-2-1 comprises a boss 92-2-1-1, the narrow connector excavating device 512 comprises a U-shaped outer wall chain cutter 7-512Y, rock soil at the bottom of the U-shaped wall 92-2-1 is excavated, and the boss 92-2-1-1 sinking backwards is embedded in the U-shaped groove 92-1-1-1 sinking forwards.

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 a cast-in-place underground building is characterized in that the underground building (1) comprises an outer wall (2), a top plate (1-1), a bottom plate (1-2) and a construction device (3) and consists of end sections (4) positioned at two ends and a middle section (11) positioned in the middle, the outer wall (2) comprises longitudinal walls (2X) and transverse walls (2Y), the end sections (4) comprise the transverse walls (2Y) positioned at the end parts and the two longitudinal walls (2X) positioned at two sides, and the middle section (11) comprises the longitudinal walls (2X) positioned at two sides; the construction device (3) comprises an excavating device (5), a hanging device (3-1) and a pouring device (6), wherein the hanging device (3-1) is positioned at the top of the building (1), the excavating device (5) excavates rock soil at the bottom of the bottom plate (1-2), the excavating device (5) comprises a chain cutter (7) and a driving device (5-1), and the chain cutter (7) comprises a chain (7-1) and cutters (7-2) arranged on the chain (7-1); the driving device (5-1) is arranged above the bottom plate (1-2); the vertical wall (2X) comprises holes (2X-1) which are positioned above the bottom plate (1-2) and staggered up and down, the chain cutter (7) envelopes the bottom plate (1-2) through the holes (2X-1), the vertical wall (2X) comprises a lower vertical wall (2X 1) positioned below the holes (2X-1) and an upper vertical wall (2X 2) positioned above the holes (2X-1), and the thickness of the upper vertical wall (2X 2) is smaller than or equal to the sum of the thicknesses of the lower vertical wall (2X 1) and the chain cutter (7); the building (1) is cast in sections on the ground along the length direction through the casting device (6), and the building (1) is in a suspension state through the hanging device (3-1).

2. A sinking construction unit for a cast-in-place type underground structure according to claim 1, wherein the entrance of the hole (2X-1) comprises an edge plate (2X-1-1) and an inclined surface (2X-1-2), and when the chain cutter (7) carries soil greater than a gap between the hole (2X-1) and the chain cutter (7), it is crushed by the entrance edge plate (2X-2-1) or crushed to the outside of the longitudinal wall (2X) by the inclined surface (2X-1-2).

3. A sinking construction unit for a cast-in-place underground building according to claim 2, wherein the building (1) is sunk to a predetermined depth, and is in a critical state when buoyancy of underground water to the building (1) and friction of rock soil to the building (1) are equal to the self weight of the building (1) including the excavating means (5), and the building (1) is always in a suspended state during sinking by applying weight to the building (1).

4. A sinking construction unit for a cast-in-place underground structure according to claim 3, wherein the link cutter (7) comprises a link plate (7-3), the link plate (7-3) is installed on the chain (7-1), and the cutter (7-2) is installed on the link plate (7-3).

5. A sinking construction unit for a cast-in-place underground building according to claim 4, wherein the chain cutter (7) comprises a plurality of sets of tapered strip chain cutters (8), wherein the cutter (7-2) of the strip chain cutters (8) comprises a head cutter (8-1) at the front end, the middle cutter (8-2) is positioned in the middle, the scraper (8-3) is positioned at the tail end, the head cutter (8-1) comprises a long cutter (8-1-1), the middle cutter (8-2) comprises two short cutters (8-2-1), the height of the scraper (8-3) is slightly lower than that of the head cutter (8-1) and the middle cutter (8-2), the head cutter (8-1) and the middle cutter (8-2) excavate rock soil, and the scraper (8-3) brings the excavated rock soil to the front.

6. A sinking construction unit for a cast-in-place underground building according to claim 5, wherein the suspending means (3-1) comprises a plurality of steel strand elevating jacks (3-1A), the plurality of steel strand elevating jacks (3-1A) are synchronously and slowly elevated, and the building (1) is sunk in a suspended state and is difficult to be deviated due to its own huge dead weight.

7. A sinking construction unit for a cast-in-place underground building according to claim 6, wherein the chain cutter (7) is adapted to satisfy different geological conditions by controlling a descending speed of the hanger (3-1) when excavating the soil, and is adapted to be replaced in the building (1) when the cutter (7-2) is worn.

8. A sinking construction unit for a cast-in-place underground building according to claim 7, characterized in that the building (1) comprises an end section (4) and a middle section (11) and a joint (9) connected between the adjacent middle sections (11), the joint (9) comprises a first sinking wide joint (9-1) and a second sinking narrow joint (9-2), the wide joint (9-1) and the narrow joint (9-2) are respectively positioned at the left end and the right end of the adjacent two sections, the end section (4) comprises an end structure (4-1) and an end joint (4-2) positioned at one end, and the middle section (11) comprises a left joint (11-1), a middle structure (11-2) and a right joint (11-3); the excavating device (5) comprises an interface excavating device (51), the interface excavating device (51) comprises a wide interface excavating device (511) and a narrow interface excavating device (512), the wide interface excavating device (511) excavates rock soil at the bottom of a wide interface (9-1), the narrow interface excavating device (512) excavates rock soil at the bottom of a narrow interface (9-2), a chain cutter (7) in the wide interface excavating device (511) envelopes the wide interface (9-1), and a chain cutter (7) in the narrow interface excavating device (512) envelopes the narrow interface (9-2).

9. The sinking construction equipment for the cast-in-place type underground building according to claim 8, wherein the port (9) comprises a bottomless port (91), the bottomless wide port (91-1) of the bottomless port (91) comprises a U-shaped narrow outer wall (91-1-1) and a vertical outer wall (91-1-2), the vertical outer wall (91-1-2) comprises a vertical groove (91-1-2-1), the wide port excavating device (511) comprises a U-shaped narrow outer wall chain cutter (7-511Y) and a vertical outer wall chain cutter (7-511X) which are perpendicular to each other, the U-shaped narrow outer wall chain cutter (7-511Y) excavates the rock soil at the bottom of the U-shaped narrow outer wall (91-1-1), the vertical outer wall chain cutter (7-511X) excavates the rock soil at the bottom of the vertical outer wall (91-1-2), the bottomless narrow connector (91-2) of the bottomless plate connector (91) comprises a U-shaped outer wall (91-2-1), the U-shaped outer wall (91-2-1) comprises a U-shaped boss (91-2-1-1), the narrow connector excavating device (512) comprises a U-shaped outer wall chain cutter (7-512Y), rock soil at the bottom of the U-shaped outer wall (91-2-1) is excavated by the U-shaped outer wall chain cutter (7-512Y), and the U-shaped boss (91-2-1-1) which sinks later is embedded in the vertical groove (91-1-2-1) which sinks earlier.

10. A sinking construction device for a cast-in-place underground building according to claim 9, wherein the port (9) comprises a bottom plate port (92), a bottom wide port (92-1) with the bottom plate port (92) comprises a U-shaped wide outer wall (92-1-1), the inner side of the U-shaped wide outer wall (92-1-1) comprises a U-shaped groove (92-1-1-1), the wide port digging device (511) comprises a U-shaped wide outer wall chain cutter (7-521Y), and the U-shaped wide outer wall chain cutter (7-521Y) digs rock soil at the bottom of the U-shaped wide outer wall (92-1-1); the narrow interface (92-2) with the bottom plate interface (92) comprises a U-shaped wall (92-2-1), the U-shaped wall (92-2-1) comprises a boss (92-2-1-1), the narrow interface excavating device (512) comprises a U-shaped outer wall chain cutter (7-512Y), rock soil at the bottom of the U-shaped wall (92-2-1) is excavated, and the boss (92-2-1-1) sinking backwards is embedded in the U-shaped groove (92-1-1-1) sinking forwards.

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