WO2023066327A1

WO2023066327A1 - Construction method for underground building consisting of sinking wall foundation

Info

Publication number: WO2023066327A1
Application number: PCT/CN2022/126352
Authority: WO
Inventors: 王树生
Original assignee: 王树生
Priority date: 2021-10-21
Filing date: 2022-10-20
Publication date: 2023-04-27
Also published as: CN114164861A

Abstract

The present invention relates to the technical field of underground building construction. Disclosed is a construction method for an underground building consisting of a sinking wall foundation. The underground building comprises the sinking wall foundation, slotted piles, a top plate, a bottom plate, a connecting body, and a construction device; the sinking wall foundation is an external wall which is formed by combining an under-wall strip-shaped foundation, an underground diaphragm wall, and a structural external wall of the building and directly sinks in place without digging a foundation pit after construction is completed on the ground; adjacent external walls are connected by means of the slotted piles; for adjacent slotted piles and external walls, after construction of the slotted piles is completed firstly, the external walls are then directly subjected to wall sinking construction on the ground. The construction device comprises a wall construction device and a pile sinking device; a hanging device hangs the external wall; a bottom excavating device excavates rock soil at the bottom of the external wall, and the excavated rock soil is unearthed by means of an unearthed slot; the external wall sinks to a set position; the rock soil in the unearthed slot is cleaned, the connecting body is poured, and then follow-up construction is conducted till all construction of the building is completed.

Description

Construction method for underground constructions consisting of sunken wall foundations

technical field

The invention relates to the technical field of underground building construction, in particular to a construction method for an underground building composed of sinking wall foundations.

Background technique

Existing large-scale underground buildings are often constructed by the open-cut method. The open-cut method needs to excavate the foundation pit first for support and precipitation, and then pour or assemble the underground building in the foundation pit. The process is complicated, the cost is expensive, and the construction period is long. There is a larger impact on the surrounding high-rise buildings.

The existing underground buildings sink as a whole, relying on their own weight to sink, and their own weight is all pressed on the chain knife at the bottom. The chain knife is easy to break and the driving power is greatly increased; it is easy to tilt when falling, and it is difficult to correct the deviation; The amount and sinking speed are out of control, and the cutter head is easy to wear.

Contents of the invention

Aiming at the problems existing in the prior art, the object of the present invention is to provide a construction method for an underground building composed of sinking wall foundations, so as to solve the problems mentioned in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: the building located underground comprises sinking wall foundation, slot pile, top plate, base plate, connecting body and construction device, and sinking wall foundation is exactly the strip foundation under the wall of building, underground continuous wall and After the construction of the three-in-one structural exterior wall is completed on the ground, the exterior wall that is directly sunk in place without digging a foundation pit, and the adjacent exterior walls are connected by slot piles, and the adjacent slot piles and exterior walls are completed with slot piles first After the construction, the sunken wall construction of the outer wall is directly carried out on the ground. The construction device includes a wall construction device and a pile sinking device. The wall construction device includes a bottom excavation device and a hanging device on the top of the outer wall. The hanging device hangs the outer wall, and the bottom digging device excavates the rock and soil at the bottom of the outer wall. The section of the upper part of the slot pile includes an excavation groove. The width of the excavation groove is greater than or equal to the thickness of the two ends of the outer wall. The excavated rock and soil are excavated through the excavation tank, the outer wall is sunk to the set position, the rock and soil in the excavation tank are cleaned, the connecting body is poured, and the follow-up construction is carried out until the entire construction of the building is completed.

As preferred in the present invention, the pile sinking device includes a frame, a pile pressing device, a pile external drilling rig and an excavation pipe, the bottom of the slotted pile includes the positioning hole of the excavation pipe and the inclined cone at the bottom of the pile, and the excavation pipe is located outside the slotted pile In the unearthed groove, the drill pipe of the drilling machine outside the pile is located in the unearthed pipe, and the drilling tool at the bottom of the drill pipe protrudes out of the unearthed pipe. The soil squeezes to the drilling tool, and the external drilling rig sends the rock and soil at the bottom to the top through the excavation pipe.

As preferred in the present invention, the bottom excavation device includes a hydraulic excavation device, the hydraulic excavation device includes a scouring device and a pumping device, the scouring device includes a pipeline frame at the bottom of the outer wall, and the outer wall is suspended by the hanging device Next, start the pumping device, the scouring device at the bottom of the outer wall excavates the rock and soil, and the excavated rock and soil are transported to the upper part through the excavation tank to realize the sinking operation of the outer wall.

As preferred in the present invention, the two ends of the outer wall include a transverse boss, and the bottom of the transverse boss includes a wall corner oblique cone surface. The device is sent out, and the unearthed groove includes a C-shaped groove for fitting with the outer wall. The maximum width of the C-shaped groove is greater than or equal to the thickness of the outer wall at the horizontal boss; the wall construction device includes a formwork, and the outer wall is poured in the formwork. The construction method of the external wall includes the construction method A of sinking while pouring, and the construction method B of sinking after all the pouring is completed.

As preferred in the present invention, the building is an underground tunnel, and the construction area of the underground tunnel longitudinally includes a pile construction section, an outer wall construction section, a support construction section, an excavation section, a floor construction section and a roof construction section, and the construction device includes Temporary support and building construction are carried out in flow operation according to the sequence of each construction section, and the main steps are as follows:

1) Complete the construction of the grooved pile in the pile construction section;

2) In the construction section of the exterior wall: the construction of the exterior wall is completed; the hanging device hangs the exterior wall and descends slowly; the bottom excavation device excavates the rock and soil at the bottom of the exterior wall; the excavated rock and soil are excavated through the excavation groove; the exterior wall sinks to the set position;

3) Complete the construction of temporary support in the support construction section;

4) Complete the excavation of all rock and soil inside the outer wall in the excavation section;

5) Complete the construction of the base plate in the base plate construction section;

6) Complete the construction of the roof in the roof construction section;

7) Remove the temporary support, that is, complete the entire construction of the underground tunnel.

Preferably as the present invention, the construction method of described building is cover and dig method, and its main steps are as follows:

1) Complete the construction of the slot pile;

2) Complete the construction of the exterior wall;

3) Complete the construction of the roof;

4) Excavating rock and soil inside the outer wall;

5) Complete the construction of the bottom plate.

Preferably as the present invention, described building is basement, and basement comprises two-story basement, and second-floor basement comprises middle plate, and middle plate comprises middle plate beam, and the main construction steps of second-floor basement are as follows:

1) Complete the construction of the slot pile;

2) Complete the construction of the exterior wall;

3) Complete the construction of temporary support above the outer wall;

4) Excavate the rock and soil at a set depth in the lower outer wall of the negative floor;

5) Complete the construction of the plate girder;

6) Excavate all the rock and soil in the negative second floor;

7) Pouring the bottom plate;

8) Complete the construction of the roof;

9) Complete the construction of the middle plate and remove the temporary support, that is to say, complete all the construction.

As preferred in the present invention, the building includes a mid-wall located between the exterior walls on both sides, the mid-wall includes a bottom mid-wall below the floor and an upper mid-wall above the bottom slab, and the mid-wall includes a full mid-wall and a column mid-wall The two structures, the bottom middle wall and the upper middle wall in the full middle wall and the bottom middle wall in the column-in-wall adopt the same structure as the outer wall, and the upper middle wall in the column-in-wall includes columns arranged longitudinally inside the building, There are longitudinal mid-slab beams arranged longitudinally between adjacent columns, the diameter of the columns and the thickness of the longitudinal mid-slab beams are smaller than the thickness of the bottom mid-wall; the bottom excavation device includes a mid-wall excavation device, and the mid-wall excavation device excavates the bottom of the mid-wall The rock and soil, columns and longitudinal mid-slab girders sink synchronously with the mid-wall in the grooves excavated by the mid-wall excavation device.

As preferred in the present invention, the hanging device includes a steel strand hydraulic lifting jack, and the steel strand hydraulic lifting jack adopts a core-through structure hydraulic lifter as the lifting tool, and the wedge-shaped anchorages at both ends of the hydraulic lifter have a one-way self- When the anchor is working, it will automatically lock the steel strand. When the anchor is not working, let go of the steel strand, and the steel strand can move up and down. The hydraulic lifting jacks of several steel strands are synchronously and slowly lifted. The wall is sunk in the suspended state.

As preferred in the present invention, when the external wall is sunk, the descending speed of the hanging device is controlled to meet different geological conditions.

To sum up, the sinking wall foundation is a three-wall-in-one structure, which is particularly easy to adopt prefabricated buildings. The permanent roof, floor slab or beam in the underground structure can be used as support, and the sinking wall foundation is replaced by a strip foundation under the wall The traditional pile foundation can also play the role of a water-stop curtain. It is a rapid wall sinking construction method without foundation pits and supports.

Compared with the overall sinking of the building, its own weight is large. The invention reduces the weight of the sinking construction of a single structural part through the split structure of the slot pile and the wall, and adds a hanging device. The sinking speed is controllable and does not cause tilt.

Description of drawings

Fig. 1 is a top view of an underground building 1, and is also a schematic structural view of an outer wall 2A, a slot pile 3, a roof 1-1 and a connecting body 1-3 forming the building 1;

Fig. 2 is the A-direction view of Fig. 1, and it is also a structural schematic diagram of the construction device 4 carrying out the subsidence construction of the outer wall 2A after the construction of the slot pile 3 is completed first, and it is also a structural schematic diagram of the bottom excavation device 5 using a chain knife to excavate the bottom rock and soil ;

Fig. 3 is a structural schematic diagram of the sinking construction of the slotted pile 3 by the pile sinking device 4B, and is also a structural schematic diagram of the part of the outer wall 2A that has been constructed between the two slotted piles 3;

Fig. 4 is the A-A view of Fig. 1, and also the drilling rig 4B-3 outside the pile passes through the drilling tool 4B-3-2 at the bottom of the drill pipe 4B-3-1 to excavate a large area of rock and soil at the bottom of the trench pile 3, and the rock and soil in other areas pass through Schematic diagram of the pile bottom inclined cone surface 3-3 pushing the rock and soil below to the drilling tool 4B-3-2;

Fig. 5 is the top view of slot pile 3;

Fig. 6 is a schematic structural view of the external wall 2A sinking construction through the hydraulic excavation device 5A;

Fig. 7 is a view of A-A of Fig. 6, which is also a schematic structural view of the flushing device 5A-1;

Fig. 8 is a schematic diagram of the structure of the external wall 2A, which is composed of a chain 5B-1 and a cutter 5B-2, and the wire saw 5B excavates the rock and soil at the bottom to carry out sinking construction;

Fig. 9 is a left view of Fig. 8, and it is also a structural schematic diagram of a wall angle tapered surface 2-1-1 provided at the bottom of the transverse boss 2-1;

Fig. 10 is a schematic diagram of the structure of the lateral boss 2-1 of the outer wall 2A embedded in the C-shaped groove 3-1C of the groove pile 3;

Fig. 11 is a schematic structural view of the outer wall 2A being poured in the template 4-2;

Fig. 12 shows that the construction area 6 includes pile construction section 6-1, exterior wall construction section 6-2, support construction section 6-3, excavation section 6-4, floor construction section 6-5 and roof construction section 6- Schematic diagram of the structure of 6;

Fig. 13 is the A-A view of Fig. 12;

Fig. 14 is that the construction method is the cover excavation method, after the construction of the outer wall 2A, the structural representation of the roof 1-1 is first constructed;

Fig. 15 is a structural schematic diagram of excavating the internal rock and soil after completing the construction of the top plate 1-1, and then completing the construction of the bottom plate 1-2;

FIG. 16 is a schematic structural view of a building 1 including a wall-in-column 9B between the outer walls 2A on both sides;

Fig. 17 is the A-A view of Fig. 16, and it is also a structural schematic diagram of the column middle wall 9B consisting of the bottom middle wall 9-1 below the bottom plate 1-2 and the upper middle wall 9-2 above;

Fig. 18 is a C-C view of Fig. 16, which is also a structural schematic diagram of longitudinally arranged longitudinal mid-plate beams 1-4-1X between adjacent columns 9-2-1;

Fig. 19 is a structural schematic diagram of the middle wall excavating device 59 excavating the rock and soil at the bottom of the middle wall 9;

Fig. 20 is a schematic structural view of the building 1 including the full central wall 9A;

Fig. 21 is the B-B view of Fig. 20;

1 in the figure is the building; 11 is the underground tunnel; 12 is the basement; 12A is the second-floor basement; 2 is the sinking wall foundation; 1A is the strip foundation under the wall; 1B is the underground continuous wall; 1 is the top plate; 1-2 is the bottom plate; 1-3 is the connecting body; 1-4 is the middle plate; 1-4-1 is the middle plate beam; 1-4-1X is the longitudinal middle plate beam; 2A is the outer wall; 2X is the longitudinal outer wall; 2Y is the horizontal outer wall; 2-1 is the horizontal boss; 2-1-1 is the inclined cone surface of the wall corner; 3 is the slot pile; 3-1 is the excavation slot; 3-1C is the C-shaped slot ; 3-2 is a positioning hole; 3-3 is an inclined cone at the bottom of the pile; 4 is a construction device; 4-1 is a hanging device; 4-1A is a steel strand hydraulic lifting jack; 4A is a wall construction device; 4B is Pile sinking device; 4B-1 is the frame; 4B-2 is the pile pressing device; 4B-3 is the drilling rig outside the pile; 4B-4 is the excavation pipe; 4-2 is the template; 4-3 is the temporary support; 5 is Bottom excavation device; 5A is hydraulic excavation device; 5A-1 is flushing device; 5A-1-1 is pipeline frame; 5A-2 is pumping device; 5B is wire saw; Cutter; 59 is the middle wall excavation device; 6 is the construction area; 6-1 is the pile construction section; 6-2 is the outer wall construction section; 6-3 is the support construction section; 6-4 is the excavation section; 6-5 6-6 is the roof construction section; 9 is the middle wall; 9-1 is the bottom middle wall; 9-2 is the upper middle wall; 9A is the whole middle wall; 9B is the column middle wall; 9-2- 1 is the column.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIGS. 1-21. In the embodiment of the present invention, the building 1 located underground includes a sinking wall foundation 2, a slot pile 3, a top plate 1-1, a bottom plate 1-2, a connecting body 1-3 and a construction device 4, and the sinking wall foundation 2 is the strip foundation 1A under the wall of building 1, the underground continuous wall 1B and the structural exterior wall 1C. 2A is connected by slotted piles 3, and the adjacent slotted piles 3 and the outer wall 2A are first completed after the construction of the slotted piles 3, and then the sinking wall construction of the outer wall 2A is directly carried out on the ground, and the construction device 4 includes the wall construction device 4A and The pile sinking device 4B and the wall construction device 4A include a bottom digging device 5 and a hanging device 4-1 positioned at the top of the outer wall 2A. During wall sinking construction, the hanging device 4-1 hangs the outer wall 2A, and the bottom digging device 5 excavates The rock and soil at the bottom of the outer wall 2A, the cross-section of the upper part of the groove pile 3 includes the excavation groove 3-1, the width of the excavation groove 3-1 is greater than or equal to the thickness of the two ends of the outer wall 2A, and the two ends of the outer wall 2A are embedded in the excavation groove 3-1 Among them, the excavated rock and soil are excavated through the excavation tank 3-1, the outer wall 2A is sunk to the set position, the rock and soil in the excavation tank 3-1 are cleaned, the connecting body 1-3 is poured, and then the follow-up construction is carried out. Until the entire construction of Building 1 is completed.

The pile sinking device 4B includes a frame 4B-1, a pile pressing device 4B-2, a pile external drilling machine 4B-3 and an excavation pipe 4B-4, and the bottom of the slotted pile 3 includes a positioning hole 3- of the excavation pipe 4B-4. 2 and the inclined cone surface 3-3 at the bottom of the pile, the unearthed pipe 4B-4 is located in the unearthed groove 3-1 outside the grooved pile 3, and the drill pipe 4B-3-1 of the external drilling rig 4B-3 is located in the unearthed pipe 4B-4 , the drilling tool 4B-3-2 at the bottom of the drill pipe 4B-3-1 protrudes out of the excavation pipe 4B-4. When sinking the pile, the pile pressing device 4B-2 presses the grooved pile 3 into the bottom, and the inclined cone surface 3 at the bottom of the pile -3 Squeeze the rock and soil below to the drilling tool 4B-3-2, and the external pile drilling rig 4B-3 sends the rock and soil at the bottom to the top through the excavation pipe 4B-4; the pile pressing device 4B-2 includes an impact hammer and a vibratory hammer and static pressure devices.

The bottom excavation device 5 includes a hydraulic excavation device 5A, the hydraulic excavation device 5A includes a flushing device 5A-1 and a pumping device 5A-2, and the flushing device 5A-1 includes a pipeline frame 5A-1-1 at the bottom of the outer wall 2A. 1. Put the outer wall 2A in a suspended state through the hanging device 4-1, start the pumping device 5A-2, and the scouring device 5A-1 at the bottom of the outer wall 2A excavates the rock and soil, and the excavated rock and soil pass through the excavation tank 3- 1 is transported to the top to realize the sinking operation of the outer wall 2A.

It should be noted that: as shown in Figure 8 and Figure 9, the bottom excavation device 5 can also adopt the structure of a wire saw 5B, the wire saw 5B is composed of a chain 5B-1 and a cutter 5B-2, and the wire saw 5B at the bottom of the outer wall 2A To excavate rock and soil, the wire saw 5B from bottom to top will bring the excavated rock and soil to the top in the excavation groove 3-1.

The two ends of the outer wall 2A include a transverse boss 2-1, and the bottom of the transverse boss 2-1 includes a wall angle tapered surface 2-1-1. When sinking the wall, the wall corner tapered surface 2-1-1 will The rock and soil below are squeezed to the middle and sent out by the bottom excavation device 5. The excavation groove 3-1 includes a C-shaped groove 3-1C for fitting with the outer wall 2A, and the maximum width of the C-shaped groove 3-1C is greater than or equal to the horizontal direction. The thickness of the outer wall 2A at the boss 2-1; the wall construction device 4A includes a formwork 4-2, the outer wall 2A is poured in the formwork 4-2, and the construction method of the outer wall 2A includes sinking while pouring The construction method A, and the construction method B after all the pouring is completed.

As shown in Figures 12 to 13, the building 1 is an underground tunnel 11, and the underground tunnel 11 longitudinally includes a pile construction section 6-1, an exterior wall construction section 6-2, a support construction section 6-3, and an excavation section. Section 6-4, bottom plate construction section 6-5 and roof construction section 6-6, construction device 4 includes temporary support 4-3, construction of building 1 is carried out in flow operation according to the order of each construction section, and its main steps are as follows:

1) Complete the construction of the grooved pile 3 in the pile construction section 6-1;

2) In the external wall construction section 6-2: the construction of the external wall 2A is completed; the hanging device 4-1 hangs the external wall 2A and descends slowly; the bottom digging device 5 excavates the rock and soil at the bottom of the external wall 2A; the excavated rock and soil Unearth through the excavation groove 3-1; the outer wall 2A sinks to the set position;

3) Complete the construction of the temporary support 4-3 in the support construction section 6-3;

4) Complete the excavation of all the rock and soil in the outer wall 2A in the excavation section 6-4;

5) Complete the construction of the base plate 1-2 in the base plate construction section 6-5;

6) Complete the construction of roof 1-1 in roof construction section 6-6;

7) Remove the temporary support 4-3, that is, complete the entire construction of the underground tunnel 11.

As shown in Figure 14 and Figure 15, the construction method of described building 1 is cover and dig method, and its main steps are as follows:

1) finish the construction of groove pile 3;

2) Complete the construction of exterior wall 2A;

3) Complete the construction of roof 1-1;

4) Excavating rock and soil within the outer wall 2A;

5) Complete the construction of base plate 1-2;

As shown in Figures 16 to 19, the feature is that the building 1 is a basement 12, the basement 12 includes a second-floor basement 12A, the second-floor basement 12A includes a middle plate 1-4, and the middle plate 1-4 includes a middle plate beam 1 -4-1. The main construction steps of the second-floor basement 12A are as follows:

1) finish the construction of groove pile 3;

2) Complete the construction of exterior wall 2A;

3) Complete the construction of the temporary support 4-3 above the outer wall 2A;

4) Excavate the rock and soil at a set depth in the lower outer wall 2A of the negative first floor;

5) Complete the construction of the plate beam 1-4-1;

6) Excavate all the rock and soil in the negative second floor;

7) Pouring the bottom plate 1-1;

8) Complete the construction of roof 1-1;

9) Complete the construction of the middle plate 1-4, and dismantle the temporary support 4-3, that is, complete the entire construction.

It should be noted that: the construction step 8 can also be completed after the construction step 9 is completed.

The tunnel 1 includes a middle wall 9 between the outer walls 2A on both sides, and the middle wall 9 includes a bottom middle wall 9-1 below the bottom plate 1-2 and an upper middle wall 9-2 above the bottom plate 1-2, and the middle wall 9 Including two structures of the full middle wall 9A and the column middle wall 9B, the bottom middle wall 9-1 and the upper middle wall 9-2 of the whole middle wall 9A and the bottom middle wall 9-1 of the column middle wall 9B adopt the same structure as the outer wall The same structure as 2A, the upper middle wall 9-2 in the middle wall 9B includes vertically arranged columns 9-2-1 in the tunnel 1, and longitudinally arranged longitudinal middle plates are included between adjacent columns 9-2-1 The beam 1-4-1X, the diameter of the column 9-2-1 and the thickness of the longitudinal middle plate beam 1-4-1X are all less than the thickness of the bottom middle wall 9-1; the bottom excavation device 5 includes a middle wall excavation device 59, the middle wall Wall digging device 59 excavates the rock and soil at the bottom of middle wall 9, and column 9-2-1 and longitudinal middle plate beam 1-4-1X sink synchronously with middle wall 9 in the groove that middle wall digging device 59 excavates.

The hanging device 4-1 includes a steel strand hydraulic lifting jack 4-1A, and the steel strand hydraulic lifting jack 4-1A adopts a core-through structure hydraulic lifter as a lifting tool, and the wedge-shaped anchors at both ends of the hydraulic lifter have One-way self-locking function, when the anchorage is working tight, it will automatically lock the steel strand, when the anchorage is not loose, release the steel strand, the steel strand can move up and down, several steel strand hydraulic lift jacks 4- 1A is lifted and lowered slowly synchronously, and the outer wall 2A sinks in a suspended state. Due to its own huge dead weight, it is difficult to produce deflection.

What needs to be explained is: due to its own huge weight, it is difficult to produce deviation, so there is no need for deviation correction.

The external wall 2A satisfies different geological conditions by controlling the descending speed of the hanging device 4-1 during sunken wall construction.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. structure and operation, so it should not be construed as a limitation to the present invention. In the present invention, it should also be noted that the terms "installation" and "connection" should be interpreted in a broad sense, for example, it can be fixed connection or detachable connection, or The integrated connection may also be a mechanical connection, or an indirect connection through an intermediary, and the specific meaning of the terms in the present invention may be understood according to specific circumstances.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims

A construction method for an underground building consisting of sunken wall foundations, characterized in that the underground building (1) includes sunken wall foundations (2), slot piles (3), roof (1-1), floor (1-2 ), connectors (1-3) and construction devices (4), the sinking wall foundation (2) is the under-wall strip foundation (1A), underground diaphragm wall (1B) and structural exterior wall (1C) of the building (1) After the three-wall-in-one construction is completed on the ground, the outer wall (2A) that is directly sunk in place without digging a foundation pit, the adjacent outer walls (2A) are connected by slotted piles (3), and the adjacent slotted piles (3) and the exterior wall (2A) is to first complete the construction of the slot pile (3), and then directly carry out the wall sinking construction of the exterior wall (2A) on the ground, and the construction device (4) includes the wall construction device (4A) and the pile sinking device (4B), the wall construction device (4A) includes a bottom excavation device (5) and a hanging device (4-1) at the top of the outer wall (2A). During sinking wall construction, the hanging device (4-1) hangs Excavation wall (2A), bottom excavation device (5) excavates rock and soil at the bottom of exterior wall (2A), and the section of slot pile (3) top comprises unearthed groove (3-1), and the width of unearthed groove (3-1) is greater than Or equal to the thickness of the two ends of the outer wall (2A), the two ends of the outer wall (2A) are embedded in the excavation groove (3-1), and the excavated rock and soil are excavated through the excavation groove (3-1), and the outer wall (2A) Sinking to the set position, clearing the rock and soil in the excavation tank (3-1), pouring the connecting body (1-3), and then carrying out subsequent construction until the entire construction of the building (1) is completed.
According to claim 1, the construction method for an underground building composed of sunken wall foundations is characterized in that said pile sinking device (4B) comprises a frame (4B-1), a pile pressing device (4B-2) , pile external drilling rig (4B-3) and unearthed pipe (4B-4), the bottom of slotted pile (3) comprises the location hole (3-2) of unearthed pipe (4B-4) and pile bottom inclined cone surface (3- 3), the unearthed pipe (4B-4) is located in the unearthed groove (3-1) outside the grooved pile (3), and the drill pipe (4B-3-1) of the pile external drilling machine (4B-3) is located in the unearthed pipe (4B -4), the drilling tool (4B-3-2) at the bottom of the drill pipe (4B-3-1) protrudes out of the excavation pipe (4B-4), and during pile sinking, the pile pressing device (4B-2) pushes the groove The pile (3) is pressed into the bottom, the inclined cone surface (3-3) at the bottom of the pile squeezes the rock and soil below to the drilling tool (4B-3-2), and the drilling machine outside the pile (4B-3) passes through the excavation pipe (4B-4 ) to send the rock and soil at the bottom to the top.
According to claim 2, the construction method for underground construction composed of sinking wall foundation is characterized in that said bottom excavation device (5) comprises a hydraulic excavation device (5A), and the hydraulic excavation device (5A) comprises a flushing device (5A-1) and pumping device (5A-2), the flushing device (5A-1) includes the pipeline frame (5A-1-1) at the bottom of the outer wall (2A), and the hanging device (4-1 ) put the outer wall (2A) in a suspended state, start the pumping device (5A-2), the scour device (5A-1) at the bottom of the outer wall (2A) excavates the rock and soil, and the excavated rock and soil pass through the excavation tank (3 -1) Conveying to the upper side to realize the sinking operation of the outer wall (2A).
The construction method for an underground building composed of sunk wall foundations according to claim 3, characterized in that the two ends of the outer wall (2A) comprise a transverse boss (2-1), and the transverse boss (2 The bottom of -1) includes the inclined cone surface (2-1-1) of the wall corner. When the wall sinks, the inclined cone surface (2-1-1) of the wall corner squeezes the rock and soil below to the middle, and is sent out by the bottom excavating device (5) , the excavation groove (3-1) includes a C-shaped groove (3-1C) for fitting with the outer wall (2A), and the maximum width of the C-shaped groove (3-1C) is greater than or equal to the transverse boss (2-1 ) at the thickness of the exterior wall (2A); the wall construction device (4A) includes the formwork (4-2), the exterior wall (2A) is poured in the formwork (4-2), and the construction of the exterior wall (2A) The methods include the construction method A of subsidence while pouring, and the construction method B of subsidence after all pouring is completed.
The construction method for an underground building composed of sinking wall foundations according to claim 4, characterized in that said building (1) is an underground tunnel (11), and the construction area (6) of the underground tunnel (11) is in Longitudinal includes pile construction section (6-1), exterior wall construction section (6-2), support construction section (6-3), excavation section (6-4), floor construction section (6-5) and roof construction Section (6-6), construction device (4) comprises temporary support (4-3), and the construction of building (1) is to carry out flow operation according to the order of each construction section, and its main steps are as follows:

1) Complete the construction of the grooved pile (3) at the pile construction section (6-1);

2) In the exterior wall construction section (6-2): complete the construction of the exterior wall (2A); the hanging device (4-1) hangs the exterior wall (2A) and lowers slowly; the bottom digging device (5) excavates the exterior wall ( 2A) the rock and soil at the bottom; the excavated rock and soil are excavated through the excavation groove (3-1); the outer wall (2A) sinks to the set position;

3) Complete the construction of the temporary support (4-3) in the support construction section (6-3);

4) Complete the excavation of all rock and soil in the outer wall (2A) in the excavation section (6-4);

5) Complete the construction of the base plate (1-2) in the base plate construction section (6-5);

6) Complete the construction of the roof (1-1) in the roof construction section (6-6);

7) Remove the temporary support (4-3), that is, complete all the construction of the underground tunnel (11).
According to claim 5, the construction method for the underground building composed of sinking wall foundation is characterized in that the construction method of the building (1) is the cover-excavation method, and its main steps are as follows:

1) finish the construction of groove pile (3);

2) Complete the construction of the exterior wall (2A);

3) Complete the construction of the roof (1-1);

4) Excavating rock and soil inside the outer wall (2A);

5) Complete the construction of the bottom plate (1-2).
The construction method for an underground building composed of sinking wall foundations according to claim 4, characterized in that said building (1) is a basement (12), and the basement (12) includes a two-story basement (12A), two The first floor basement (12A) includes the middle plate (1-4), the middle plate (1-4) includes the middle plate beam (1-4-1), and the main construction steps of the second floor basement (12A) are as follows:

1) finish the construction of groove pile (3);

2) Complete the construction of the exterior wall (2A);

3) Complete the construction of the temporary support (4-3) above the outer wall (2A);

4) Excavate the rock and soil of the set depth in the lower outer wall (2A) of the negative floor;

5) Complete the construction of the plate beam (1-4-1);

6) Excavate all the rock and soil in the negative second floor;

7) Pouring the bottom plate (1-1);

8) Complete the construction of the roof (1-1);

9) Complete the construction of the middle plate (1-4), remove the temporary support (4-3), and then complete all the construction.
According to claim 6 or 7, the construction method for the underground building composed of sinking wall foundation is characterized in that the building (1) includes a middle wall (9) between the outer walls (2A) on both sides , the middle wall (9) includes a bottom middle wall (9-1) below the base plate (1-2) and an upper middle wall (9-2) above, and the middle wall (9) includes a full middle wall (9A) and There are two structures of the column-in-wall (9B), the bottom-middle wall (9-1) and the upper-middle wall (9-2) in the full-middle wall (9A) and the bottom-middle wall (9-2) in the column-middle wall (9B). 1) Using the same structure as the outer wall (2A), the upper middle wall (9-2) in the middle wall (9B) includes columns (9-2-1) arranged longitudinally in the building (1), adjacent The columns (9-2-1) include longitudinally arranged longitudinal mid-plate beams (1-4-1X), the diameter of the columns (9-2-1) and the longitudinal mid-plate beams (1-4-1X) Thickness is all less than the thickness of bottom middle wall (9-1); Bottom excavation device (5) comprises middle wall excavation device (59), and middle wall excavation device (59) excavates rock and soil at the bottom of middle wall (9), and column (9) -2-1) and the longitudinal mid-plate beam (1-4-1X) sink synchronously with the mid-wall (9) in the groove excavated by the mid-wall digging device (59).
The construction method for underground buildings composed of sinking wall foundations according to claim 8, characterized in that said hanging device (4-1) comprises a steel strand hydraulic lifting jack (4-1A), a steel strand The line hydraulic lifting jack (4-1A) adopts the core-through structure hydraulic lifter as the lifting tool. The wedge-shaped anchorages at both ends of the hydraulic lifter have a one-way self-locking effect. When the anchorage is working, it will automatically lock the steel strand. When the anchorage is not working, release the steel strand, and the steel strand can move up and down. Several steel strand hydraulic lifting jacks (4-1A) are lifted and lowered synchronously and slowly, and the outer wall (2A) sinks in the suspended state .
The construction method for an underground building composed of sunk wall foundations according to claim 9, characterized in that the outer wall (2A) is constructed by controlling the hanging device (4-1) when carrying out sunk wall construction. The descending speed can be adjusted to meet different geological conditions.