CN113882429B - Construction method and construction structure of underground structure - Google Patents
Construction method and construction structure of underground structure Download PDFInfo
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- CN113882429B CN113882429B CN202111171994.XA CN202111171994A CN113882429B CN 113882429 B CN113882429 B CN 113882429B CN 202111171994 A CN202111171994 A CN 202111171994A CN 113882429 B CN113882429 B CN 113882429B
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- 238000010276 construction Methods 0.000 title claims abstract description 133
- 230000005641 tunneling Effects 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000009412 basement excavation Methods 0.000 claims description 69
- 239000002689 soil Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention provides a construction method and a construction structure of an underground structure, wherein the construction method of the underground structure comprises the following steps: step S10, tunneling construction pre-digging grooves, lining pipe pieces in the pre-digging grooves, and enabling the pipe pieces on the side close to the foundation pit to be detachable pipe pieces; s20, constructing a foundation pit and a foundation pit bottom plate primary support structure, and constructing a main body structure in the foundation pit; and S30, dismantling the detachable pipe piece in the pre-dug groove, constructing a main structure in the pre-dug groove, and connecting the main structure in the pre-dug groove with the main structure in the foundation pit. By the method and the device, the technical problem that construction of the enclosure structure around the foundation pit causes large waste is solved.
Description
Technical Field
The invention relates to the field of tunnels and underground engineering, in particular to a construction method and a construction structure of an underground structure.
Background
The newly-built underground engineering effectively improves the utilization rate of urban space. Mechanical construction methods for underground structures mainly include open excavation, underground excavation, shield tunneling, and pipe jacking, and underground excavation mainly includes mining and new excavation, and with the progress of technology and construction equipment, mechanical construction methods such as underground excavation, shield tunneling, and pipe jacking are widely used.
The open cut method has the advantages of high construction speed, good construction environment, reliable structure quality, low construction cost and the like, and is generally preferred under the condition of permission of engineering conditions.
When large-area open cut construction is carried out, foundation pit excavation with large span and large depth is carried out, and the construction risk is large, so that a high-strength enclosure structure can be constructed around the foundation pit before excavation, the enclosure structure usually comprises piles and walls surrounding the foundation pit, and the depth of the piles is much larger than that of the foundation pit. The space around the foundation pit can be occupied by the enclosing structure; the construction cost of the building enclosure structures is high, and the construction period is long; after the construction of the main structure is completed, the building envelopes are generally discarded, which causes great waste.
Disclosure of Invention
The invention aims to provide a construction method and a construction structure of an underground structure, which are used for relieving the technical problem of relatively large waste caused by constructing a building envelope around a foundation pit.
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a construction method of an underground structure, which comprises the following steps:
step S10, tunneling construction pre-digging grooves, lining pipe pieces in the pre-digging grooves, and enabling the pipe pieces on the side close to the foundation pit to be detachable pipe pieces;
s20, constructing primary support structures of the foundation pit and a foundation pit bottom plate, and constructing a main body structure in the foundation pit;
and S30, dismantling the detachable pipe piece in the pre-digging groove, constructing a main body structure in the pre-digging groove, and connecting the main body structure in the pre-digging groove with the main body structure in the foundation pit.
In a preferred embodiment, the step S10 includes: s11, setting a working well; s12, carrying out subsurface excavation and tunneling construction, and lining by using the duct piece, wherein the duct piece on the side close to the foundation pit and the duct piece on the position of a subsurface excavation top plate are the detachable duct pieces; and S13, open cut tunneling construction is carried out, the duct piece lining is adopted, and the duct piece close to the foundation pit side and the duct piece at the position of the open cut bottom plate are detachable duct pieces.
In a preferred embodiment, the step S20 includes: s21, tunneling a primary support structure of a foundation pit base plate; and S22, open excavation construction of the foundation pit.
In a preferred embodiment, the step S21 includes: sequentially finishing the starting, the tunneling and the receiving of the rectangular pipe curtain in the pre-excavation groove, and repeatedly implementing; the rectangular pipe curtains are mutually occluded to form the primary support structure of the foundation pit base plate.
In a preferred embodiment, the width of the duct piece on the side of the foundation pit in the underground excavation and excavation construction is equal to the width of the rectangular pipe curtain.
In a preferred embodiment, the step S22 is performed by using a partial open cut construction, and after the partial soil excavation is completed, the main structure is constructed in the partial open cut construction.
In a preferred embodiment, the construction method comprises: step S40, constructing a pre-dug groove bottom plate; the step S40 is performed before the step S30.
In a preferred embodiment, the thickness of the bottom plate of the pre-dug groove is greater than or equal to that of the primary support structure of the foundation pit bottom plate.
In a preferred embodiment, in step S10, two working wells are provided at diagonal positions of the pre-dug trench to be dug, and tunneling construction is respectively initiated to a junction in two directions in each of the working wells.
The present invention provides a construction structure of an underground structure, comprising: the foundation pit, the pre-digging groove, a foundation pit bottom plate primary support structure and a pre-digging groove bottom plate, wherein the pre-digging groove is arranged around the foundation pit;
the foundation pit base plate primary support structure is arranged in the foundation pit, a main body structure is arranged in the foundation pit, and the main body structure in the foundation pit is positioned above the foundation pit base plate primary support structure;
the pre-digging groove bottom plate is arranged in the pre-digging groove, a duct piece is arranged in the pre-digging groove, and the duct piece adjacent to the side of the foundation pit is a detachable duct piece.
The invention has the characteristics and advantages that:
the construction method cancels the enclosure structure required by the construction of the foundation pit, can ensure the construction safety, and has the following advantages:
(1) The construction period is shortened, the engineering materials are saved, and the construction cost is reduced;
(2) Surrounding underground space is not invaded, and the influence on subsequent underground engineering construction is reduced;
(3) The depth of the enclosure structure of the foundation pit with large span and large depth is usually larger, and the depth of the pre-dug groove of the construction method is close to the depth of the foundation pit, so that the excavation depth is reduced, and the construction difficulty and the construction cost are reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic illustration of a work well in a method of constructing a subterranean structure according to the present invention;
FIG. 2 is a schematic view showing the installation of segments in pre-dug grooves in the construction method of an underground structure according to the present invention;
fig. 3 to 5 are schematic views of step S10 in the construction method of the underground structure provided by the present invention;
6-7 are schematic structural views of pre-dug grooves in the construction method of the underground structure provided by the present invention;
fig. 8 to 11 are schematic views of step S21 in the construction method of the underground structure provided by the present invention;
fig. 12 to 13 are schematic structural views of preliminary bracing structures of a pre-excavation groove and a foundation pit bottom plate in the construction method of an underground structure provided by the present invention;
fig. 14 to 17 are schematic views of step S22 in the construction method of the underground structure according to the present invention;
FIGS. 18-19 are schematic structural views of a subterranean formation;
fig. 20 is a schematic view of a construction method of an underground structure provided by the present invention.
The reference numbers illustrate:
11. a body structure; 12. a working well;
20. a foundation pit; 201. dividing; 21. a primary support structure of a foundation pit bottom plate;
30. pre-grooving; 31. pre-excavating a groove bottom plate;
40. a duct piece; 401. the duct piece can be disassembled; 41. a first tube sheet; 42. a second segment; 43. a third segment; 44. a fourth segment;
51. a tunneling machine is excavated; 52. open cut tunneller;
60. rectangular tube curtain equipment; 61. rectangular pipe curtain.
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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Scheme one
The present invention provides a construction method of an underground structure, as shown in fig. 6, 7 and 14-20, the construction method including: step S10, tunneling construction is conducted on the pre-digging groove 30, a duct piece 40 is lined in the pre-digging groove 30, and the duct piece 40 on the side close to the foundation pit 20 is a detachable duct piece 401; s20, constructing a foundation pit 20 and a foundation pit bottom plate primary support structure 21, and constructing a main body structure 11 in the foundation pit 20; step S30, removing the detachable pipe piece 401 in the pre-dug groove 30, and constructing the main structure 11 in the pre-dug groove 30, wherein the main structure 11 in the pre-dug groove 30 is connected with the main structure 11 in the foundation pit 20.
In the construction method, the pipe piece 40 lined in the pre-excavation groove 30 can play a role in enclosing the construction foundation pit 20, and the safety of the construction foundation pit 20 is guaranteed. The duct piece 40 close to the side of the foundation pit 20 is a detachable duct piece 401, after the detachable duct piece 401 is detached, the main structure 11 is constructed in the pre-digging groove 30, and the main structure 11 in the pre-digging groove 30 is connected with the main structure 11 in the foundation pit 20, so that the construction of the main structure 11 is completed.
The construction method cancels the enclosure structure required by the construction of the foundation pit 20, can ensure the construction safety, and has the following advantages: (1) The construction period is shortened, the engineering materials are saved, and the construction cost is reduced; (2) Surrounding underground space is not invaded, and the influence on subsequent underground engineering construction is reduced; (3) The depth of the enclosure structure of the foundation pit 20 with large span and large depth is usually larger, and the depth of the pre-excavation groove 30 and the depth of the foundation pit 20 are both close to the height of the main structure 11, so that the excavation depth is reduced, and the construction difficulty and the construction cost are reduced.
The duct piece 40 can be a prefabricated duct piece 40, and a lining structure is formed in the pre-dug groove 30, and meanwhile, a building protection effect is achieved on the construction foundation pit 20. After the detachable pipe piece 401 in the pre-dug groove 30 is removed, the main structure 11 in the pre-dug groove 30 is connected with the main structure 11 in the foundation pit 20, and the construction joint is processed to complete the construction of the main structure 11.
In the construction method, the pre-excavation groove 30 is constructed first, and then the foundation pit 20 is constructed. The pre-dug grooves 30 are arranged according to the underground structure to be constructed, the pre-dug grooves 30 may surround the foundation pit 20 to be constructed, and further, the pre-dug grooves 30 may have a ring shape. However, the pre-cut groove 30 is not limited to a ring shape, for example: the pre-dug groove 30 is linear, the foundation pit 20 is positioned at one side of the pre-dug groove 30, and the pre-dug groove 30 and the pipe piece 40 in the pre-dug groove 30 protect one side of the foundation pit 20.
In one embodiment, step S10 includes: s11, setting a working well 12; step S12, carrying out subsurface excavation and tunneling construction, and lining by using duct pieces 40, wherein the duct pieces 40 at the side close to the foundation pit 20 and the duct pieces 40 at the position of a subsurface excavation top plate are detachable duct pieces 401; and S13, open cut tunneling construction is carried out, the duct pieces 40 are lined, and the duct pieces 40 at the side close to the foundation pit 20 and the duct pieces 40 at the position of the open cut bottom plate are detachable duct pieces 401.
As shown in fig. 3-5, a tunneling machine 51 is initiated in the work well 12 and lined with the segments 40. As shown in fig. 2 and 7, the segment 40 on the side facing the foundation pit 20 in the excavation and excavation construction is the first segment 41, the segment 40 on the position of the excavation roof is the second segment 42, and both the first segment 41 and the second segment 42 are detachable segments 401, so that the foundation pit 20 is dismantled after the construction is completed, and the main structure 11 is constructed in the pre-excavation groove 30.
Starting an open-cut tunneling machine in the working well 12, excavating soil on the upper part of the periphery, and lining with duct pieces 40, as shown in fig. 2 and 7, the duct piece 40 on the side close to the foundation pit 20 in open-cut tunneling construction is a third duct piece 43, the duct piece 40 on the position of an open-cut bottom plate is a fourth duct piece 44, and the third duct piece 43 and the fourth duct piece 44 are detachable duct pieces 401, so that the foundation pit 20 can be dismantled after the construction is completed, and the main structure 11 is constructed in the pre-excavation groove 30.
The open cut tunnel boring machine is started in the working well 12 after the underground cut tunnel boring machine 51 is bored for a certain distance, so that mutual interference between the upper and lower tunnel boring machines during construction can be prevented. Step S12 is performed simultaneously with step S13, the underground excavation heading machine 51 waits at the intersection after completion of construction heading, and the open excavation heading machine 52 and the underground excavation heading machine 51 are respectively hoisted after the end of heading of the open excavation heading machine 52 reaches the intersection.
Further, in the step S10, two working wells 12 are arranged at diagonal positions of the pre-excavation groove 30 to be excavated, and in each working well 12, excavation construction is respectively initiated to the intersection along two directions, which is beneficial to improving the construction efficiency. Taking the pre-dug groove 30 as a rectangle as an example, as shown in fig. 1, two working wells 12 are arranged at opposite corners of the field, the two working wells 12 are respectively positioned at the corners of the rectangle, a heading machine is respectively started in each working well 12 along two directions of the edge of the field, and the two working wells are intersected and butted at the other two corners of the rectangle. Through the two smaller working wells 12, the surrounding soil bodies are excavated by adopting a method of combining the open-cut tunneling machine 52 and the underground-cut tunneling machine 51, so that the construction efficiency is improved.
In one embodiment, step S20 includes: s21, tunneling a primary support structure 21 of a foundation pit base plate; and step S22, open excavation of the construction foundation pit 20. The step S21 and the step S22 are sequentially performed, the foundation pit 20 is excavated by an open excavation method, and the safety of open excavation construction of the foundation pit 20 can be ensured under the support of the duct piece 40 in the pre-excavation groove 30 and the primary support structure 21 of the foundation pit bottom plate.
Further, step S21 includes: starting, tunneling and receiving the rectangular pipe curtain 61 in the pre-excavation groove 30 are sequentially completed, and the implementation is repeated; the rectangular tube curtains 61 are mutually occluded to form the foundation pit bottom plate primary support structure 21. Specifically, the foundation pit 20 is an open cut area, a rectangular pipe curtain device 60 is started in the constructed pre-excavation groove 30, and a foundation pit bottom plate primary support structure 21 is constructed. As shown in fig. 8-9, the rectangular tube sheet apparatus 60 is in place: according to the construction requirement, the second pipe piece 42 and the fourth pipe piece 44 at proper positions are dismantled to form an inlet and an outlet for constructors, equipment and materials, and then the rectangular pipe curtain equipment 60 is hoisted. As shown in fig. 10 to 13, the rectangular pipe curtain 61 is constructed: the first duct piece 41 at the corresponding position is broken before the pipe curtain construction, the starting, the tunneling and the receiving of the rectangular pipe curtain 61 are sequentially completed in the pre-excavation groove 30, the processes are repeated, the zero-interval tunneling construction of the rectangular pipe curtain 61 is carried out, the rectangular pipe curtains 61 are mutually occluded, and the foundation pit bottom plate primary support structure 21 is formed.
Further, the width of the duct piece 40 on the side of the foundation pit 20 in the underground excavation and excavation construction is equal to the width of the rectangular tube curtain 61, so that the rectangular tube curtain 61 is started, excavated and received in step S21.
In one embodiment, step S22 is performed by open excavation of the section, and after the soil excavation of the section 201 is completed, the main structure 11 is constructed in the section 201. Under the enclosing conditions of the duct pieces 40 in the pre-dug groove 30 and the foundation pit bottom plate primary support structure 21, open-cut construction is carried out on each subsection 201, after the soil body of each subsection 201 is excavated, the main structure 11 is constructed in the subsection 201, and the subsection open-cut construction and the construction of the main structure 11 are carried out simultaneously, so that the construction efficiency is improved. Calculation is carried out before the open cut subsection 201, and the volume of the excavated soil body is guaranteed to meet the anti-floating requirement of the whole structure. The construction speed of the main structure 11 is adapted to the open cut construction, so that the construction of the main structure 11 of each subsection 201 is connected, and the number of construction joints is reduced.
The construction method comprises the following steps: step S40, constructing a pre-dug groove bottom plate 31; step S40 is performed before step S30. The pre-trenched trench floor 31 enhances the strength of the pre-trenched trench 30 and ensures the safety of the subsequent construction of the main structure 11 in the pre-trenched trench 30. Preferably, the steps S21, S40 and S22 are performed in sequence, and after all the rectangular pipe curtains 61 are constructed, the pre-excavated groove bottom plate 31 is backfilled.
Further, the thickness of the pre-excavation bottom plate 31 is greater than or equal to the thickness of the foundation pit bottom plate primary support structure 21, so that the pre-excavation bottom plate 31 wraps the end of the rectangular pipe curtain 61 to embed and fix the rectangular pipe curtain 61.
In the construction method, the peripheral soil body is excavated by two smaller working wells 12 by adopting a method of combining an open-cut tunneling machine 52 and a subsurface tunneling machine 51 to form a pre-excavation groove 30; lining with the duct pieces 40 to form a lining structure, and enclosing open cut construction of the foundation pit 20; starting rectangular pipe curtain equipment 60 in the constructed pre-excavation groove 30, and constructing a foundation pit bottom plate primary support structure 21; and performing subsection open cut construction on the foundation pit 20 under the support of the lining structure and the foundation pit bottom plate primary support structure 21.
Taking the example that the proposed underground space area is rectangular, the construction steps comprise: s11, preparing a construction site, arranging a working well 12 at a proper position according to a planned underground space region, determining the size of the working well 12 according to the width of a heading machine, meeting the heading requirement of the heading machine and the construction requirement of a pre-excavated groove 30, and simultaneously meeting the construction requirement of a subsequent rectangular pipe curtain 61 by the width of the pre-excavated groove 30; step S12, the underground excavation tunneling machine 51 starts in the working well 12, and excavates the soil body at the lower part of the periphery; step S13, after tunneling a certain distance, the underground excavation tunneling machine 51 starts an open excavation tunneling machine in the working well 12, and excavates the soil body on the upper part of the periphery; the pre-dug groove 30 is lined by adopting a combined type segment; step S21, installing rectangular pipe curtain equipment 60 in the pre-excavation groove 30 for initiation, completing initiation, tunneling and receiving of the rectangular pipe curtain equipment 60 in sequence, and meshing and connecting the rectangular pipe curtains 61 to form a primary support structure at the bottom of the foundation pit 20; step S40, constructing a pre-dug groove bottom plate 31; step S22, performing subsection open cut construction under the enclosing conditions of the pipe piece 40 in the pre-excavation groove 30 and the primary support structure at the bottom of the foundation pit 20, and constructing the main body structure 11 in a subsection manner; step S30, removing the pipe piece 40 lined in the pre-dug groove 30, constructing the main body structure 11 in the pre-dug groove 30, and processing construction joints to complete the construction of the main body structure 11; waterproof and two-lining for construction interior
Scheme two
The present invention provides a construction structure of an underground structure, as shown in fig. 16 and 17, the construction structure including: the foundation pit structure comprises a foundation pit 20, a pre-excavation groove 30, a foundation pit bottom plate primary support structure 21 and a pre-excavation groove bottom plate 31, wherein the pre-excavation groove 30 is arranged around the foundation pit 20; the foundation pit bottom plate primary support structure 21 is arranged in a foundation pit 20, a main body structure 11 is arranged in the foundation pit 20, and the main body structure 11 in the foundation pit 20 is positioned above the foundation pit bottom plate primary support structure 21; the pre-digging groove bottom plate 31 is arranged in the pre-digging groove 30, the pipe piece 40 is arranged in the pre-digging groove 30, and the pipe piece 40 at the side close to the foundation pit 20 is a detachable pipe piece 401.
This construction structure is the structure in the work progress of underground structure, utilizes this construction structure, has cancelled the required envelope of construction foundation ditch 20, and can ensure construction safety, has following advantage: (1) The construction period is shortened, the engineering materials are saved, and the construction cost is reduced; (2) Surrounding underground space is not occupied, and influence on subsequent underground engineering construction is reduced; (3) The depth of the enclosure structure of the foundation pit 20 with large span and large depth is usually larger, and the depth of the pre-excavation groove 30 of the construction method is close to that of the foundation pit 20, so that the excavation depth is reduced, and the construction difficulty and the construction cost are reduced.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (6)
1. A method of constructing an underground structure, comprising:
step S10, tunneling construction pre-digging grooves, lining pipe pieces in the pre-digging grooves, and enabling the pipe pieces on the side close to the foundation pit to be detachable pipe pieces;
s20, constructing primary support structures of the foundation pit and a foundation pit bottom plate, and constructing a main body structure in the foundation pit;
step S30, dismantling the detachable pipe piece in the pre-digging groove, and constructing a main body structure in the pre-digging groove, wherein the main body structure in the pre-digging groove is connected with the main body structure in the foundation pit;
the construction method further comprises the following steps:
step S40, constructing a pre-excavation groove bottom plate, wherein the thickness of the pre-excavation groove bottom plate is greater than or equal to that of the primary support structure of the foundation pit bottom plate;
said step S40 is performed before said step S30;
the step S20 includes:
s21, tunneling a primary support structure of a foundation pit base plate;
s22, open excavation construction of the foundation pit;
the step S21 includes: sequentially finishing the starting, the tunneling and the receiving of the rectangular pipe curtain in the pre-excavation groove, and repeatedly implementing; the rectangular pipe curtains are mutually occluded to form a primary support structure of the foundation pit base plate;
the pre-digging groove is arranged around the foundation pit, the foundation pit bottom plate primary support structure is arranged in the foundation pit, and the pre-digging groove bottom plate is arranged in the pre-digging groove.
2. A construction method of an underground structure according to claim 1, characterized in that the step S10 comprises:
s11, setting a working well;
s12, carrying out subsurface excavation and tunneling construction, and lining by using the duct piece, wherein the duct piece on the side close to the foundation pit and the duct piece on the position of a subsurface excavation top plate are the detachable duct pieces;
and S13, open cut tunneling construction is carried out, the duct piece lining is adopted, and the duct piece close to the foundation pit side and the duct piece at the position of the open cut bottom plate are detachable duct pieces.
3. A method of constructing an underground structure according to claim 2, wherein the width of the segment on the side of the excavation construction adjacent to the foundation pit is equal to the width of the rectangular tube sheet.
4. A method of constructing an underground structure as claimed in claim 1, wherein the step S22 is a step of performing a partial open cut construction, and the main structure is constructed in the partial open cut construction after the partial soil body excavation is completed.
5. A method of constructing an underground structure according to claim 1, wherein in the step S10, two working wells are provided at diagonal positions of the pre-dug trench to be dug, and in each of the working wells, tunneling construction is initiated to a junction in two directions, respectively.
6. A construction structure of an underground structure, characterized in that the construction method of an underground structure according to any one of claims 1 to 5 is employed, the construction structure comprising: the foundation pit, the pre-excavation groove, a foundation pit bottom plate primary support structure and a pre-excavation groove bottom plate, wherein the pre-excavation groove is arranged around the foundation pit;
the foundation pit base plate primary support structure is arranged in the foundation pit, a main body structure is arranged in the foundation pit, and the main body structure in the foundation pit is positioned above the foundation pit base plate primary support structure;
the pre-digging groove bottom plate is arranged in the pre-digging groove, a duct piece is arranged in the pre-digging groove, and the duct piece adjacent to the side of the foundation pit is a detachable duct piece.
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| CN110409497A (en) * | 2019-06-21 | 2019-11-05 | 中交第二航务工程局有限公司 | Construction method suitable for water-bed shallow embedding prefabrication and assembly construction tunnel |
| CN110306592A (en) * | 2019-06-30 | 2019-10-08 | 天津市市政工程设计研究院 | A construction method of underground comprehensive pipe gallery structure with shield first and well behind |
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| CN108589771A (en) * | 2018-03-22 | 2018-09-28 | 深圳市市政设计研究院有限公司 | One kind having runed underground station increasing layer transfer node construction method |
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| CN113882429A (en) | 2022-01-04 |
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