CN112978538A - Reverse-construction deep and large foundation pit vertical hoisting device and construction method thereof - Google Patents
Reverse-construction deep and large foundation pit vertical hoisting device and construction method thereof Download PDFInfo
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- CN112978538A CN112978538A CN202110251888.6A CN202110251888A CN112978538A CN 112978538 A CN112978538 A CN 112978538A CN 202110251888 A CN202110251888 A CN 202110251888A CN 112978538 A CN112978538 A CN 112978538A
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 239000000725 suspension Substances 0.000 claims abstract description 47
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 230000035939 shock Effects 0.000 claims abstract description 5
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
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Abstract
The invention discloses a reverse construction deep and large foundation pit vertical hoisting device and a construction method hoisting device thereof. The automatic lifting device ensures that constructors can quickly move up and down through the automatic lifting of the suspension cage; the cage connecting piece and the cage sliding connecting piece in the suspension cage are detachably arranged, so that the suspension cage can be conveniently replaced and adjusted on site, and is more suitable for the site; through the arrangement of the guide rail frame, on one hand, the assembly connection can be carried out according to the height of the foundation pit, and the running height of the suspension cage is ensured; on one hand, the arrangement of the shock pad, the stress sensor and the displacement sensor on the guide rail frame can ensure the safety monitoring during the operation and improve the operation safety; through the setting of attaching the wall frame, provide fixed basis for the guide rail frame, and attach the setting of attachment in the wall frame, do benefit to and increase the tie point, further ensure fixed scope and space.
Description
Technical Field
The invention belongs to the technical field of foundation pit construction, and particularly relates to a vertical hoisting device for a reverse-construction deep and large foundation pit and a construction method thereof.
Background
In foundation pit engineering, a construction site is convenient for constructors to quickly go up and down, the conventional method is that an upper-lower temporary riding track is arranged on the construction site, and supporting points of the upper-lower temporary riding track are placed on the ground in a foundation pit, so that the working efficiency is low, the danger degree is high, the aspects of influencing the soil emergence of a reverse construction foundation pit and the like have many defects, the requirements of a reverse construction deep and large foundation pit project cannot be met, the delay of construction progress is brought, the construction cost is increased, and the risk factors are increased, and the construction requirements are difficult to meet.
Disclosure of Invention
The invention provides a reverse-construction deep and large foundation pit vertical hoisting device and a construction method thereof, which are used for solving the technical problems of rapid ascending and descending of foundation pit workers, flexible device installation, labor saving, safe device, high efficiency and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vertical hoisting device for a reverse deep and large foundation pit comprises an inner lining wall of an annular foundation pit, a wall attaching frame pre-embedded on the inner lining wall, a guide rail frame connected to the outer end of the wall attaching frame, and a hoisting cage connected to the outer end of the guide rail frame;
the guide rail frame comprises a square rail frame body, rail frame connecting columns arranged at four corners of the rail frame body, and frame connecting slide rail pieces connected to the two circumferential ends of the rail frame connecting columns on one side far away from the lining wall;
the suspension cage comprises a cage body, a cage connecting piece connected to one side, close to the inner lining wall, of the cage body and a cage sliding connecting piece connected between the cage connecting piece and the frame connecting slide rail piece, wherein the cage sliding connecting piece is detachably connected with the cage connecting piece, and the cage sliding connecting piece is slidably connected with the frame connecting slide rail piece.
Further, the guide rail frame is formed by assembling standard unit sections, the splicing part is also connected with a shock pad, and stress sensors and displacement sensors are arranged on two sides of the splicing part.
Furthermore, the rail frame body is a square frame body and comprises upper and lower square frame rods, rail frame connecting columns connected between four corners of the upper and lower frame rods, and frame connecting sliding rail pieces in a shape of a trapezoid (21274) and connected to the annular frame rods of the rail frame connecting columns on one side far away from the interior lining wall.
Furthermore, the suspension cage is cuboid, and the length and the width of the suspension cage are both smaller than those of the rail frame body; the suspension cage is controlled by hydraulic or electric remote control, and the two sides of the suspension cage in the length direction are provided with switch doors.
Furthermore, the cage body comprises a rectangular frame body, protective nets are arranged on the periphery and the top of the rectangular frame body, cage connecting pieces connected to corner columns on one side of the cage body close to the inner lining wall, and cage sliding connecting pieces connected by cage connecting piece bolts; the cage connecting piece and the cage sliding connecting piece are sleeved and then are reinforced through a bolt; the outer end of the cage sliding connecting piece is -shaped, the inner side of -shaped is convexly corresponding to a connector 21274, and the frame of the cage sliding connecting piece is a sliding rail piece.
Furthermore, the wall attaching frame comprises a wall attaching main frame, a wall attaching embedded part connected with the wall attaching main frame and embedded on the lining wall, and an attaching part connected between the wall attaching main frame and the rail frame connecting column.
Furthermore, the wall-attached main frame comprises a cross rod horizontally connected with the lining wall and the rail frame connecting column and an inclined rod obliquely connected with the lining wall and the rail frame connecting column; the attachment piece is horizontally arranged along the circumferential direction of the inner lining wall and is vertically connected with the rail frame connecting column, and the attachment piece is vertically connected with the transverse rod of the main wall attaching frame in the horizontal upward direction.
Furthermore, the top of the guide rail frame and the top of the foundation pit are connected with a sidewalk, top fences are arranged on two sides of the sidewalk, bottom fences are arranged on the periphery of the bottom of the guide rail frame, and the length and the width of each bottom fence are larger than those of the projection areas of the suspension cage and the guide rail frame; the height of the guide rail frame from the top of the sidewalk is at least 7.5m, and the distance from the bottom of the guide rail frame to the bottom of the foundation pit is not more than 0.2 m.
Further, the construction method of the reverse construction deep and large foundation pit vertical hoisting device comprises the following specific steps:
step one, determining the distribution number of lifting devices according to the size of a foundation pit and the number of construction operators at the same horizontal height, and arranging at least two positions; embedding an attached and embedded wall part in the attached wall frame when the lining wall of the foundation pit is constructed;
step two, assembling a rail frame body in advance, horizontally placing and testing the smoothness and the damping effect of the slide rail of the rail frame body, arranging an emergency brake device on the guide rail, and then hoisting the rail frame body into a position to be installed of a foundation pit; installing a stress sensor and a displacement sensor at the assembly position of the rail frame body, and connecting the rail frame connecting column and the frame connecting sliding rail piece with the rail frame body in advance; when the guide rail frame is installed, the included angle of the vertical surface is not more than 15 degrees to the maximum;
thirdly, connecting the wall attaching frame from bottom to top, rechecking the verticality of the guide rail frame and detecting the fastening degree of each connecting point;
step four, after the suspension cage is manufactured according to the design size, the cage sliding connection piece is sleeved on the frame connecting sliding rail piece from top to bottom; the top of the suspension cage is connected with a traction device through a suspension rope and is provided with at least one safety rope;
checking the verticality and the sliding fluency of the guide rail frame, and installing a manual passage, a bottom fence and a top fence after the verticality and the sliding fluency are qualified; the distance between the adaptive suspension cage and the guide rail frame is adjusted through the sleeve joint between the cage connecting piece and the cage sliding connecting piece; or the suspension cages of different models can be replaced, so that the construction personnel can get on and off conveniently.
Furthermore, the two ends of the suspension cage are arranged or arranged in a triangular mode, the displacement and stress change are monitored in real time in the operation process of the suspension cage, and an early warning threshold value is set for control.
The invention has the beneficial effects that:
1) according to the invention, through the automatic lifting arrangement of the suspension cage, the rapid up-and-down of constructors is ensured, and the two suspension cages can ensure the up-and-down efficiency and the standby; the cage connecting piece and the cage sliding connecting piece in the suspension cage are detachably arranged, so that the suspension cage can be conveniently replaced and adjusted on site, and is more suitable for the site;
2) according to the invention, through the arrangement of the guide rail frame, on one hand, the assembly connection can be carried out according to the height of the foundation pit, and the running height of the suspension cage is ensured; on one hand, the arrangement of the shock pad, the stress sensor and the displacement sensor on the guide rail frame can ensure the safety monitoring during the operation and improve the operation safety;
3) the arrangement of the wall attaching frame provides a fixed foundation for the guide rail frame, and the arrangement of the attachment piece in the wall attaching frame is beneficial to increasing the connection point and further ensuring the fixed range and space;
the invention can ensure that constructors can walk up and down flexibly and conveniently, reduces physical consumption, overcomes the defects of long up and down time of the constructors, large physical consumption of the constructors and low escape speed when finding dangerous cases in the traditional reverse construction deep and large foundation pit, improves the construction efficiency and reduces the construction cost; meanwhile, the construction operation is put into use as soon as possible by utilizing the characteristic of convenience; the safety and the aesthetic property are ensured; additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic construction diagram of a vertical hoisting device for a reverse deep and large foundation pit;
FIG. 2 is a schematic sectional view taken along line A-A;
FIG. 3 is a schematic sectional view taken along line B-B;
FIG. 4 is a schematic view of the connection of the suspension cage, the rail bracket and the wall-attached bracket.
Reference numerals: 1-inner lining wall, 2-suspension cage, 21-cage body, 22-cage connecting piece, 23-cage sliding connecting piece, 3-guide rail frame, 31-rail frame body, 32-rail frame connecting column, 33-frame connecting sliding rail piece, 4-wall attaching frame, 41-wall attaching main frame, 42-wall attaching embedded piece, 43-attaching piece, 5-bottom fence and 6-top fence.
Detailed Description
Taking a large annular foundation pit project with a certain depth as an example, the diameter of the foundation pit is 100m, the depth of the foundation pit is 50m, and the foundation pit support adopts a superposed outer wall formed by an underground continuous wall and a lining wall 1. The lining wall 1 of the reverse deep and large foundation pit needs to be constructed in reverse after earth excavation. In order to solve the defects that the traditional reversed deep and large foundation pit has long time for people to take up and down, large physical consumption of the people and low escape speed when dangerous cases are found, a reversed deep and large foundation pit vertical hoisting device is adopted; as shown in fig. 1 to 4, the hoisting device comprises an inner lining wall 1 of the annular foundation pit, a wall attaching frame 4 pre-buried on the inner lining wall 1, a guide rail frame 3 connected to the outer end of the wall attaching frame 4, and a suspension cage 2 connected to the outer end of the guide rail frame 3;
in the embodiment, the top of the guide rail frame 3 and the top of the foundation pit are connected with a sidewalk, top fences 6 are arranged on two sides of the sidewalk, bottom fences 5 are arranged on the periphery of the bottom of the guide rail frame 3, and the length and the width of each bottom fence 5 are larger than those of the projection areas of the suspension cage 2 and the guide rail frame 3; the height of the top of the guide rail frame 3 from the sidewalk is at least 7.5m, and the distance from the bottom of the guide rail frame to the bottom of the foundation pit is not more than 0.2 m.
In this embodiment, the guide rail frame 3 includes a square rail frame body 31, rail frame connecting columns 32 disposed at four corners of the rail frame body 31, and frame connecting slide rail members 33 connected to two circumferential ends of the rail frame connecting columns 32 on a side away from the interior lining wall 1; the guide rail frame 3 is formed by assembling standard unit sections, the splicing part is also connected with a shock pad, and stress sensors and displacement sensors are arranged on two sides of the splicing part. The rail frame body 31 is a square frame body and comprises upper and lower square frame rods, rail frame connecting columns 32 connected between four corners of the upper and lower frame rods, and frame connecting sliding rail pieces 33 which are arranged at the periphery of the rail frame connecting columns 32 far away from the lining wall 1 and are shaped like a trapezoid 21274.
In this embodiment, the suspension cage 2 includes a steel cage body 21, a cage connecting member 22 connected to a side of the cage body 21 adjacent to the inner lining wall 1, and a cage sliding connecting member 23 connected between the cage connecting member 22 and the frame connecting rail member 33, wherein the cage sliding connecting member 23 is detachably connected to the cage connecting member 22, and the cage sliding connecting member 23 is slidably connected to the frame connecting rail member 33.
In this embodiment, the suspension cage 2 is rectangular, and the length and width of the suspension cage 2 are both smaller than those of the rail frame body 31; the suspension cage 2 is controlled by hydraulic pressure or electric remote control, and the two sides of the suspension cage 2 in the length direction are provided with switch doors. The cage body 21 comprises a rectangular steel frame body, protective nets are arranged on the periphery and the top of the rectangular steel frame body, a cage connecting piece 22 connected to a corner post on one side, close to the inner lining wall 1, of the cage body 21, and a cage sliding connecting piece 23 connected with the cage connecting piece 22 through bolts. The cage connecting piece 22 and the cage sliding connecting piece 23 are sleeved and then are reinforced through bolts; the outer end of the cage sliding connecting piece 23 is -shaped, the inner side of -shaped is convexly corresponding to a bracket connecting sliding rail piece 33 which is shaped like a triangle 21274.
In the present embodiment, the hanging wall attachment frame 4 includes a wall attachment main frame 41, an attachment wall fitting 42 connected to the wall attachment main frame 41 and embedded in the lining wall 1, and an attachment fitting 43 connected between the wall attachment main frame 41 and the rail attachment post 32. The wall-attached main frame 41 comprises a cross rod horizontally connected to the lining wall 1 and the rail frame connecting column 32 and an oblique rod obliquely connected to the lining wall 1 and the rail frame connecting column 32; the attachment piece 43 is horizontally arranged along the circumferential direction of the inner lining wall 1 and is vertically connected with the rail frame connecting column 32, and the attachment piece 43 is vertically connected with the transverse rod of the wall attaching main frame 41 in the horizontal upward direction.
With reference to fig. 1 and 4, a construction method of a vertical hoisting device for a reverse deep and large foundation pit is further described, which comprises the following specific steps:
step one, determining the distribution number of lifting devices according to the size of a foundation pit and the number of construction operators at the same horizontal height, and arranging at least two positions; when the foundation pit lining wall 1 is constructed, the wall attaching and embedding piece 42 in the wall attaching frame 4 is embedded.
Step two, assembling the rail frame body 31 in advance, horizontally placing the rail frame body to test the smoothness and the damping effect of the slide rail, arranging an emergency brake device on the guide rail, and hoisting the rail frame body 31 into a position to be installed of the foundation pit; a stress sensor and a displacement sensor are installed at the assembly position of the rail frame body 31, and a rail frame connecting column 32 and a frame connecting sliding rail piece 33 are connected with the rail frame body 31 in advance; the maximum vertical plane included angle is not more than 15 degrees when the guide rail frame 3 is installed.
Thirdly, connecting the wall attaching frame 4 from bottom to top, rechecking the verticality of the guide rail frame 3 and detecting the fastening degree of each connecting point;
step four, after the suspension cage 2 is manufactured according to the design size, the cage sliding connecting piece 23 is sleeved into the frame connecting sliding rail piece 33 from top to bottom; the top of the suspension cage 2 is connected with a traction device through a suspension rope and is provided with at least one safety rope.
Checking the verticality and the sliding fluency of the guide rail frame 3, and installing a manual passage, a bottom fence 5 and a top fence 6 after the verticality and the sliding fluency are qualified; the distance between the adaptive suspension cage 2 and the guide rail frame 3 is adjusted through the sleeve connection between the cage connecting piece 22 and the cage sliding connecting piece 23; or the suspension cages 2 with different models can be replaced, so that the construction personnel can get on and off conveniently.
In addition, in the construction, the suspension cage 2 is arranged at two ends or in a triangular shape, the displacement and the stress change are monitored in real time in the operation process of the suspension cage 2, and an early warning threshold value is set for control.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (10)
1. A vertical hoisting device for a reverse deep and large foundation pit is characterized by comprising an inner lining wall (1) of an annular foundation pit, a wall attaching frame (4) pre-buried on the inner lining wall (1), a guide rail frame (3) connected to the outer end of the wall attaching frame (4), and a hoisting cage (2) connected to the outer end of the guide rail frame (3);
the guide rail frame (3) comprises a square rail frame body (31), rail frame connecting columns (32) arranged at four corners of the rail frame body (31), and frame connecting slide rail pieces (33) connected to two circumferential ends of the rail frame connecting columns (32) at one side far away from the inner lining wall (1);
the suspension cage (2) comprises a cage body (21), a cage connecting piece (22) connected to one side, close to the inner lining wall (1), of the cage body (21) and a cage sliding connecting piece (23) connected between the cage connecting piece (22) and the frame connecting sliding rail piece (33), the cage sliding connecting piece (23) is detachably connected with the cage connecting piece (22), and the cage sliding connecting piece (23) is connected with the frame connecting sliding rail piece (33) in a sliding manner.
2. The vertical hoisting device for the reversed deep and large foundation pit according to claim 1, wherein the guide rail frame (3) is formed by assembling standard unit sections, the splicing part is also connected with a shock pad, and two sides of the splicing part are provided with a stress sensor and a displacement sensor.
3. The vertical hoisting device for the reversed deep and large foundation pit according to claim 1, wherein the rail frame body (31) is a square frame body and comprises upper and lower square frame rods, rail frame connecting columns (32) connected between four corners of the upper and lower frame rods, and frame connecting sliding rail members (33) which are arranged at the circumferential frame rods and connected to the rail frame connecting columns (32) at one side far away from the lining wall (1).
4. The reverse deep and large foundation pit vertical hoisting device according to claim 1, wherein the hoisting cage (2) is rectangular, and the length and width of the hoisting cage (2) are smaller than those of the rail frame body (31); the suspension cage (2) is controlled by hydraulic pressure or electric remote control, and the two sides of the suspension cage (2) in the length direction are provided with switch doors.
5. The reverse construction deep and large foundation pit vertical hoisting device according to claim 1, wherein the cage body (21) comprises a rectangular frame body with protective nets mounted on the periphery and the top, cage connecting pieces (22) connected to corner posts on one side of the cage body (21) close to the lining wall (1), and cage sliding connecting pieces (23) connected by bolts of the cage connecting pieces (22); the cage connecting piece (22) and the cage sliding connecting piece (23) are sleeved and then are reinforced through bolts; the outer end of the cage sliding connecting piece (23) is -shaped, the inner side of -shaped is convexly corresponding to a connector 21274, and the frame of the cage sliding connecting piece is connected with a sliding rail piece (33).
6. The reverse construction deep and large foundation pit vertical hoisting device according to claim 1, wherein the wall attaching frame (4) comprises a wall attaching main frame (41), a wall attaching embedded member (42) connected with the wall attaching main frame (41) and embedded on the lining wall (1), and an attaching member (43) connected between the wall attaching main frame (41) and the rail frame connecting column (32).
7. The vertical hoisting device for the reverse deep and large foundation pit according to claim 6, wherein the wall-attached main frame (41) comprises a cross bar horizontally connected to the inner lining wall (1) and the rail frame connecting column (32) and an oblique bar obliquely connected to the inner lining wall (1) and the rail frame connecting column (32); the attachment piece (43) is horizontally arranged along the circumferential direction of the inner lining wall (1) and is vertically connected with the rail frame connecting column (32), and the attachment piece (43) is vertically connected with the transverse rod of the wall attaching main frame (41) in the horizontal upward direction.
8. The reverse deep and large foundation pit vertical hoisting device according to claim 1, wherein the top of the guide rail frame (3) and the top of the foundation pit are connected with a sidewalk, top fences (6) are arranged on two sides of the sidewalk, bottom fences (5) are arranged around the bottom of the guide rail frame (3), and the length and width of each bottom fence (5) are greater than those of the projection area of the suspension cage (2) and the guide rail frame (3); the height of the guide rail frame (3) from the top to the sidewalk is at least 7.5m, and the distance from the bottom to the bottom of the foundation pit is not more than 0.2 m.
9. The construction method of the reverse deep and large foundation pit vertical hoisting device according to any one of claims 1 to 8 is characterized by comprising the following specific steps:
step one, determining the distribution number of lifting devices according to the size of a foundation pit and the number of construction operators at the same horizontal height, and arranging at least two positions; embedding an attached wall embedding piece (42) in the attached wall frame (4) when the foundation pit lining wall (1) is constructed;
step two, assembling the rail frame body (31) in advance, horizontally placing the rail frame body to test the smoothness and the damping effect of the slide rail, arranging an emergency brake device on the guide rail, and hoisting the rail frame body (31) into a position to be installed of the foundation pit; a stress sensor and a displacement sensor are installed at the assembly position of the rail frame body (31), and a rail frame connecting column (32) and a frame connecting sliding rail piece (33) are connected with the rail frame body (31) in advance; when the guide rail bracket (3) is installed, the included angle of the vertical surface is not more than 15 degrees to the maximum;
thirdly, connecting the wall attaching frame (4) from bottom to top, rechecking the verticality of the guide rail frame (3), and detecting the fastening degree of each connecting point;
fourthly, after the suspension cage (2) is manufactured according to the design size, the cage sliding connection piece (23) is sleeved into the frame connecting sliding rail piece (33) from top to bottom; the top of the suspension cage (2) is connected with a traction device through a suspension rope and is provided with at least one safety rope;
fifthly, checking the verticality and the sliding fluency of the guide rail frame (3), and installing a manual channel, a bottom fence (5) and a top fence (6) after the verticality and the sliding fluency are qualified; the distance between the adaptive suspension cage (2) and the guide rail frame (3) is adjusted through the sleeve connection between the cage connecting piece (22) and the cage sliding connecting piece (23); or the suspension cages (2) with different models can be replaced, so that the construction personnel can get on and off conveniently.
10. The construction method of the vertical hoisting device for the reverse deep and large foundation pit according to claim 9, wherein the hoisting cage (2) is arranged at two ends or in a triangular shape, displacement and stress change are monitored in real time during the operation of the hoisting cage (2), and an early warning threshold is set for control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251888.6A CN112978538A (en) | 2021-03-08 | 2021-03-08 | Reverse-construction deep and large foundation pit vertical hoisting device and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251888.6A CN112978538A (en) | 2021-03-08 | 2021-03-08 | Reverse-construction deep and large foundation pit vertical hoisting device and construction method thereof |
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| CN112978538A true CN112978538A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110251888.6A Pending CN112978538A (en) | 2021-03-08 | 2021-03-08 | Reverse-construction deep and large foundation pit vertical hoisting device and construction method thereof |
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| CN (1) | CN112978538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443535A (en) * | 2021-06-29 | 2021-09-28 | 广东裕华兴建筑机械制造有限公司 | Down extending type lifting equipment for well construction and mounting method thereof |
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| CN111762658A (en) * | 2020-07-16 | 2020-10-13 | 湖南建工集团有限公司 | Method for installing elevator in deep foundation pit construction by reverse construction method |
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2021
- 2021-03-08 CN CN202110251888.6A patent/CN112978538A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5058708A (en) * | 1990-04-02 | 1991-10-22 | Herrman Hilbert J | Scaffold and hoist structure |
| CN201080399Y (en) * | 2007-05-30 | 2008-07-02 | 广州市京龙工程机械有限公司 | Inverse type mounting construction hoist |
| CN101284618A (en) * | 2008-05-20 | 2008-10-15 | 上海市第二建筑有限公司 | Construction elevator device for reverse construction of underground structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443535A (en) * | 2021-06-29 | 2021-09-28 | 广东裕华兴建筑机械制造有限公司 | Down extending type lifting equipment for well construction and mounting method thereof |
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Application publication date: 20210618 |
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