CN113898004A - Underground space construction method - Google Patents
Underground space construction method Download PDFInfo
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- CN113898004A CN113898004A CN202111162053.XA CN202111162053A CN113898004A CN 113898004 A CN113898004 A CN 113898004A CN 202111162053 A CN202111162053 A CN 202111162053A CN 113898004 A CN113898004 A CN 113898004A
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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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- 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
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a construction method of an underground space, and belongs to the technical field of underground engineering construction. When underground space is built under a traffic road, road resources are occupied, and traffic operation is influenced. Excavating a working well at a preset position, then excavating a transverse channel, wherein the side walls of the transverse channel are respectively a tunnel portal side and an originating side, tunnel portal detachable pipe pieces are laid at the positions, corresponding to the underground space to be excavated, on the tunnel portal side, and expanded excavation area detachable pipe pieces are laid at the positions, corresponding to the underground space to be excavated, on the originating side; dismantling detachable duct pieces in the expanded excavation area, excavating the expanded excavation area, forming an initial area with corresponding cross passages, assembling a tunneling machine, then dismantling detachable duct pieces of a tunnel portal opposite to the tunneling machine, excavating an underground space in a subsection manner, laying permanent duct pieces on the side wall adjacent to the boundary of the underground space to be excavated in the excavation process, and laying detachable duct pieces on other side walls in the subsection manner; and finally, dismantling all the detachable segment sections to communicate the space of each section, thereby completing the construction of the underground space.
Description
Technical Field
The invention relates to a construction method of an underground space, and belongs to the technical field of underground engineering construction.
Background
At present, the development of the underground engineering construction technology in China is rapid, and the utilization rate of urban space is effectively improved by newly built underground engineering. The underground engineering comprises a linear underground space and a surface type underground space, wherein the linear underground space comprises a subway tunnel and the like, and the surface type underground space comprises a subway station, an underground shopping mall and the like. The underground space has a clear cross-sectional area of 50m according to the regulations of the International Tunnel Association2-100mAt 2 timeCalled large-section underground space, the clearance section area is more than 100m2Sometimes referred to as extra-large cross-section subterranean space.
At present, mechanical underground excavation methods are generally adopted for urban underground space construction, mainly comprising a shield method and a pipe jacking method, and the methods are mainly used for constructing linear underground spaces. When a large-section or super-large-section surface-type underground space is constructed, a large working well needs to be constructed on the ground, and a surrounding barrier needs to be arranged around the construction land where the working well is located, so that the occupied area is large, the time is long, and the influence on urban environment and traffic is large.
Disclosure of Invention
The invention aims to provide an underground space construction method which is used for solving the problem that a large underground space is difficult to construct under urban roads or buildings.
In order to achieve the above object, the present invention provides a method for constructing an underground space, comprising the steps of:
1) construction of a working well: selecting a proper position at the periphery of an underground space to be excavated, and excavating a working well, wherein the working well provides a pilot foundation for underground space construction;
2) constructing a transverse channel: excavating a transverse channel with the size matched with that of the working well by using the working well as a pilot foundation through an underground excavation method, and paving detachable pipe joints on two sides of the transverse channel;
3) structural partitioning: respectively arranging an expanding excavation area and a tunneling construction area on two sides of the transverse channel, wherein the expanding excavation area is used for starting tunneling equipment, and the tunneling construction area, the expanding excavation area and the corresponding transverse channel form an underground space to be excavated;
4) expanding and digging the area for construction: dismantling detachable pipe joints on the side wall of the transverse channel connected with the expanded excavation area, excavating the expanded excavation area, and constructing a main body structure and an internal structure;
5) and (3) construction of a tunneling construction area: and assembling tunneling equipment in the excavation expanding area and/or the transverse channel, dismantling detachable pipe joints on the side wall of the transverse channel connected with the tunneling construction area, excavating the tunneling construction area through the tunneling equipment, and constructing a main structure and an internal structure to complete underground space construction.
The invention has the beneficial effects that: selecting a proper position at the periphery of the underground space to be excavated, excavating a working well meeting the design depth, taking the working well as a guide foundation, excavating by a subsurface excavation method to form a transverse channel, laying detachable pipe joints on two sides of the transverse channel, wherein one side of the transverse channel, which is connected with the underground space to be excavated, is a tunneling construction area, the other side of the transverse channel is an expanded excavation area, firstly detaching the detachable pipe joints corresponding to the expanded excavation area, excavating to form an expanded excavation area, and constructing a main structure and an internal structure. And assembling tunneling equipment in the expanding excavation area and/or the corresponding transverse passage. And then, dismantling detachable pipe joints on the side wall of the transverse channel connected with the tunneling construction area, excavating the tunneling construction area through tunneling equipment, and constructing a main structure and an internal structure to complete the construction of the underground space.
Further, in the method, in the step 4), vertical expanding excavation is further performed, and after construction reaches a designed elevation, the main body structure and the internal structure are constructed.
Further, in the method, in the step 5), the tunneling construction area is divided into a plurality of split structural units according to the size of the tunneling surface of the tunneling equipment, the detachable pipe joints corresponding to the split structural units are sequentially removed, the tunneling equipment performs excavation, a main structure and a supporting structure are constructed, and the underground space construction is completed.
Further, in the method, the tunneling equipment also performs vertical expanding excavation on each split structure unit, and after construction reaches a designed elevation, the main structure and the internal structure are constructed.
Further, in the method, after the split structural units are excavated by the tunneling equipment, the detachable pipe joints are arranged between the adjacent split structural units.
Further, in the method, the detachable pipe joints in the split structure units are dismantled, the main structure and the internal structure between the adjacent split structure units are constructed, and the underground space construction is completed.
And detachable segments are adopted for supporting in the transverse passage and each subsection space so as to support the soil body and guarantee the construction safety.
Further, in the above method, the detachable pipe joint includes an upper pipe joint main structure and a lower pipe joint main structure, a transition bearing square box is provided between the upper pipe joint main structure and the lower pipe joint main structure, the transition bearing square box has at least one structural opening, a transition bearing steel plate is further provided between the transition bearing square box and the upper pipe joint main structure or the lower pipe joint main structure, and a pushing device is provided in the transition bearing square box.
The detachable pipe joints all adopt detachable steel structural parts and comprise upper pipe joint main structures and lower pipe joint main structures, transition bearing square boxes are arranged between the upper pipe joint main structures and the lower pipe joint main structures, the steel pipe pieces are adopted for supporting, supporting effect can be achieved in the construction process, the detachable pipe joints are convenient to detach, and compared with the pipe pieces made of concrete, construction cost is lower.
Further, in the method, a drawing bracelet is arranged on the transition bearing steel plate, and the pushing device is a jack.
Further, in the above method, after each excavation is completed by one split structural unit, the internal components of the excavating equipment are disassembled and transported out along the tunnel, leaving the casing of the excavating equipment in the ground as a permanent support structure.
Leaving the casing of the roadheader in the underground space to act as a permanent support structure is less costly than removing it for shipment.
Further, in the above method, in step 5), waterproofing is performed in the underground space where the construction is completed, and a concrete secondary lining is poured.
After the excavation of each subsection space is completed, waterproof construction is carried out on the subsection space, and when the detachable duct pieces in each subsection space are detached, soil bodies, surrounding rocks and the like cannot fall off, so that the construction safety is guaranteed.
Drawings
FIG. 1 is a flow chart of an underground space construction method of the present invention;
FIG. 2 is a schematic representation of the subterranean space design of the present invention;
FIG. 3 is a schematic plan view of the construction of the cross tunnel in step S2 according to the present invention;
FIG. 4 is a cross sectional view of the cross tunnel in step S2 according to the present invention;
FIG. 5 is a schematic plan view of the enlarged excavation area of step S3 according to the present invention;
FIG. 6 is a schematic cross-sectional view of the enlarged excavation area at step S3 according to the present invention;
fig. 7 is a schematic view of the heading machine corresponding to the first partition space in step S4 of the present invention;
fig. 8 is a schematic diagram of the first partitioned space in step S5 according to the present invention;
FIG. 9 is a schematic cross-sectional view of a segment of duct sheet being laid in the first partial space in step S5 of the present invention;
fig. 10 is a schematic view of the heading machine corresponding to the second partition space in step S5 of the present invention;
FIG. 11 is a schematic cross-sectional view of the subterranean space of step S5 in accordance with the present invention;
FIG. 12 is a schematic plan view of the underground space of step S5 according to the present invention;
FIG. 13 is a schematic illustration of secondary lining of a subterranean space in step S5 according to the present invention;
FIG. 14 is a schematic sectional view of the underground space after the removal of the temporary segment in step S5;
fig. 15 is a schematic plan view of the underground space after the temporary segment is removed in step S5.
In the figure, 1 is the working well, 2 is for enclosing the fender, 3 is the cross passage, 4 can dismantle the section of jurisdiction for expanding to dig the district, 5 can dismantle the section of jurisdiction for the portal, 6 is for expanding to dig the district, 7 is first subdivision space, 70 can dismantle the section of jurisdiction for first subdivision, 71 is the permanent section of jurisdiction of first subdivision, 8 is second subdivision space, 80 can dismantle the section of jurisdiction for the second subdivision, 81 is the permanent section of jurisdiction of second subdivision.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
The invention provides a method for excavating an underground space by mechanical equipment and a subsurface excavation method, which comprises the steps of selecting a proper area to excavate a working well according to the position of the underground space to be excavated, entering the underground from the working well, constructing a transverse passage along the direction towards the underground space to be excavated, expanding and excavating on one side of the transverse passage which is not adjacent to the underground space to be excavated to form an expanded excavation area, forming an initial area by the expanded excavation area and a corresponding section of the transverse passage, assembling tunneling equipment in the initial area, excavating on one side of the transverse passage adjacent to the underground space to be excavated by the tunneling equipment to form a plurality of sub-spaces, also called as split structural units, and forming the large-scale underground space to be excavated by communicating the sub-spaces.
Fig. 1 shows a flow chart of the underground space construction method of the invention, and the construction is carried out according to the design schematic diagram shown in fig. 2, which comprises the following steps:
and S1, preparing a construction site and constructing a working well. According to the position of the underground space to be excavated, a proper position is selected at the periphery of the underground space to be excavated to serve as the position of the working well 1, the working well 1 provides a pilot foundation for underground space excavation, and the working well can be used as an access in an auxiliary structure of the underground space after the underground space is excavated and formed. The underground space to be excavated in the embodiment is taken as an example of a subway station below a traffic road, so that proper positions are selected from two sides of the road to be used as design positions of an access, the position of the working well 1 is determined, an area around the working well 1 is used as a construction site according to the position of the working well 1, and the enclosure 2 is arranged around the construction site to prevent non-construction personnel from entering the construction site.
As shown in fig. 2, on a construction site, mechanical equipment is adopted for excavation according to the position of the working well 1, and the size of the working well 1 should meet the requirement of subsequent construction. When the working well 1 is excavated, after a certain depth is excavated every time, the excavated area is supported, so that the soil body is prevented from collapsing, and accidents are reduced.
And S2, constructing a transverse channel and carrying out primary lining. Through the bottom of working well 1 transportation constructor and mechanical equipment to working well 1, constructor operates mechanical equipment according to the position of horizontal passageway 3 in fig. 2, excavates horizontal passageway 3 to lay the removable tube coupling in horizontal passageway 3's both sides, carry out primary lining.
And S3, partitioning the structure. And an expanding excavation area and a tunneling construction area are respectively arranged on two sides of the transverse passage. The side wall of the transverse channel 3 adjacent to the underground space to be excavated (namely, the right side wall of the transverse channel 3 in fig. 2) is marked as a tunnel door side, the area corresponding to the tunnel door side is a tunneling construction area, the side wall opposite to the tunnel door side (namely, the left side wall of the transverse channel 3 in fig. 2) is marked as an initial side, the area corresponding to the initial side is an expanding excavation area 6, and the tunneling construction area, the expanding excavation area 6 and the corresponding section of transverse channel jointly form a large-sized underground space to be excavated. A portion corresponding to the underground space to be excavated is selected as an enlarged excavation region 6 on the originating side. The transverse passage 3 is an access passage in the auxiliary structure of the underground space to be excavated, and when the transverse passage 3 is excavated, the size of the transverse passage 3 is ensured to meet the requirements of subsequent tunneling equipment and muck transportation.
When excavating the transverse passage 3, excavating a certain distance at every time, adopting a prefabricated detachable segment, and detaching a pipe joint to perform primary lining. As shown in fig. 3 and 4, the position of the underground space to be excavated is laid on the side of the gate of the 3 holes of the cross passage, the tunnel gate can be disassembled from the duct piece 5, the position of the area is expanded and excavated on the starting side of the cross passage 3, and the area is expanded and excavated to disassemble the duct piece 4.
In this embodiment, expand and dig district can dismantle section of jurisdiction 4 and tunnel portal can dismantle section of jurisdiction 5 and adopt like in the patent document that publication number is CN206815380U the convenient structure of dismantling of interim steel member, both can effectively support in the tunnelling excavation process to cross aisle 3, be convenient for again dismantle in subsequent construction in order to accomplish other processes.
Specifically, the expanded excavation area detachable duct piece 4 comprises a steel structure upper panel serving as an upper pipe joint main structure and a steel structure lower panel serving as a lower pipe joint main structure, and a transition bearing square box matched with the cross sections of the steel structure upper panel and the steel structure lower panel is arranged between the steel structure upper panel and the steel structure lower panel; a transition steel plate is arranged between the transition bearing square box and the steel structure upper panel, a transition steel plate is arranged between the transition bearing square box and the steel structure lower panel, and the transition steel plate is arranged in a block structure and is at least divided into two blocks; arc-shaped openings or circular openings with arc values or roundness values matched with each other are arranged at the connection position of every two adjacent block transition steel plates; jacks corresponding to the positions of the structural components on the steel structure upper panel and the steel structure lower panel are arranged in the arc-shaped opening or the circular opening and serve as pushing devices; connecting bolt holes corresponding to each other in position are arranged at the joint of the steel structure upper panel and the steel structure lower panel, and transition bolt holes matched with the connecting bolt holes are arranged on the transition steel plate; connecting bolts are arranged in the connecting bolt holes and the transition bolt holes which are matched and corresponding to each other; and each blocked transition steel plate is provided with a drawing handle. The design of the duct piece 5 which can be disassembled at the tunnel portal is similar to that of the duct piece 4 which can be disassembled at the expanding and digging area.
And S4, constructing the expanding excavation area, constructing a main body structure and an internal structure, and forming an initial area of the tunneling equipment. First, the expanded excavation area detachable duct pieces 4 shown in fig. 4 are sequentially detached according to the planned construction sequence. The specific disassembly process is as follows: placing the jack at the position of the arc opening or the circular opening, and enabling the upper surface and the lower surface of the jack to be in contact with the steel structure upper panel and the steel structure lower panel; jacking the jack, and pulling the pull handle to pull out the steel plate from one side by utilizing the gap; and after the steel plate is pulled out, disassembling other structural parts. Because excessive steel sheet has inside one side opening, the identical structure of structure section is dismantled with this interim steel member is convenient to the opposite side, can expand to dig the district and can dismantle and guarantee that all the other sections of jurisdiction can not lose the support after section of jurisdiction 4 in the dismantlement, can stay in original position betterly, if there is not hard up in all the other sections of jurisdiction of discovery, can strut it to the security of reinforcing construction.
Secondly, construction operation is carried out on the expanded excavation area 6, as shown in fig. 2, the expanded excavation area 6 corresponds to an underground space to be excavated, the detachable duct pieces 4 of the expanded excavation area within the range of an expanded excavation unit are removed each time, the exposed soil body is excavated, in order to ensure construction safety, a supporting structure is constructed in the excavation process to ensure the stability of the soil body, then vertical expanded excavation is carried out, after the excavated area reaches the design elevation, an internal structure and a main structure are constructed, construction joints are processed to form the expanded excavation area 6 which meets the design standard, the expanded excavation area 6 and a section of transverse channel corresponding to the expanded excavation area 6 jointly form an originating area as shown in fig. 5 and fig. 6, and the originating area is used for assembly of tunneling equipment.
And S5, tunneling construction area construction, excavating a main body space, and carrying out secondary lining. The shell and the internal components of the heading equipment are transported from the working well 1 to the starting area for assembly, fig. 7 shows the position of the assembled heading equipment, the heading equipment in the embodiment is a heading machine which comprises a heading machine shell, a shield machine, a trolley, a cutter head and the like, and after the heading machine is assembled, the shield machine faces the underground space to be excavated and corresponds to the first part space 7 of the underground space to be excavated.
In the embodiment, the width of the tunnel portal of the tunneling construction area is designed to be 2N, and the width of the shell of the tunneling machine is N, so that the tunneling construction area is divided into two adjacent sub spaces, namely a first sub space 7 and a second sub space 8.
When designing and selecting the tunneling machine for the underground space to be constructed, a person skilled in the art should select a proper tunneling machine according to the size of the portal in the tunneling construction area. For example, if the width of the tunnel portal in the tunneling construction area is 30 meters, a tunneling machine with a casing width of 15 meters can be selected, and the tunneling construction area is divided into two partial spaces, wherein the two partial spaces are closely adjacent. If the width of the tunnel portal of the tunneling construction area is 33m, a tunneling machine with the shell width of 15 m is still selected, the tunneling construction area is divided into two sub-spaces, the two sub-spaces can be tightly attached to the edge of the underground space to be excavated to be divided, and the 3m allowance which cannot be excavated at one time is located in the middle of the underground space to be excavated, so that later-period dismantling is facilitated.
When the heading machine is installed in the initial area, the disassembly operation of the detachable tunnel portal duct piece 5 can be synchronously carried out, the detachable tunnel portal duct piece 5 corresponding to the first partition space 7 is disassembled firstly, the disassembly mode is similar to that of the detachable tunnel portal duct piece 4 in the expanding excavation area, specifically, the jack is placed at the position of the arc opening or the circular opening, and the upper surface and the lower surface of the jack are in contact with the steel structure upper panel and the steel structure lower panel; jacking the jack, and pulling the pull handle to pull out the steel plate from one side by utilizing the gap; and after the steel plate is pulled out, disassembling other structural parts. In order to ensure the construction safety, the support operation is carried out in the disassembly process.
Secondly, as shown in fig. 7, after the heading machine is assembled, the heading machine is located at the position shown in the figure, corresponding to the first partition space 7, and after the corresponding detachable duct piece 5 of the tunnel portal is removed, heading excavation and vertical excavation are carried out on the exposed soil body. As shown in fig. 8, after the excavation of the first partitioned space 7 by the heading machine is completed, the excavation is stopped, and the subsequent construction steps are performed to construct the main structure and the internal structure. In the excavation process, when a certain depth is excavated, a prefabricated detachable segment is adopted for primary lining. Specifically, as shown in fig. 2, a first-part permanent duct piece 71 is arranged on a side wall of the first part space 7 adjacent to the boundary of the underground space to be excavated (i.e., an upper side wall of the first part space 7 in fig. 2), at the top and at the bottom of the first part space 7, the first-part permanent duct piece 71 is not removed when the subsequent underground space to be excavated is modified and supported, a first-part detachable duct piece 70 is arranged on another side wall of the first part space 7 (i.e., a position where the first part space 7 and the second part space 8 are close to each other in fig. 2), and the first-part detachable duct piece 70 plays a supporting role when the first part space 7 is excavated and needs to be removed when being communicated with the second part space 8. The duct piece 70 can be dismantled in the first subsection to adopt the above-mentioned convenient structure of dismantling of interim steel member. Fig. 9 shows the positional relationship of the first-subsection removable segment 70 and the first-subsection permanent segment 71 in the first-subsection space 7.
As shown in fig. 10, after the heading machine completes the excavation of the first partitioned space 7, the internal components of the heading machine are removed and transported out using a shelling and dismantling technique, leaving the heading machine housing in the ground as a permanent support structure. The internal components of the heading machine are transported to the starting area along the first part space 7, and simultaneously, a heading machine shell is transported to the starting area from the working well 1 again, the internal components of the heading machine and the heading machine shell are assembled again, and excavation construction is carried out on the second part space 8 after the assembly is completed.
In the excavation process, excavate the certain degree of depth at every turn, adopt prefabricated section of jurisdiction of dismantling to advance primary lining cutting, the lining cutting mode is similar with the section of jurisdiction lining cutting mode in the first part space 7. Specifically, on the second subdivision space 8 and the adjacent lateral wall of the underground space of waiting to excavate (being the lower lateral wall of second subdivision space 8 in fig. 2), the top and the bottom of second subdivision space 8 set up the permanent section of jurisdiction of second subdivision 81, the permanent section of jurisdiction 81 of second subdivision does not demolish when subsequently treating to excavate the underground space and decorating and strut, set up the section of jurisdiction 80 can be dismantled in second subdivision on another lateral wall of second subdivision space 8 (being the lateral wall that second subdivision space 8 and first subdivision space 7 are next in fig. 2), the section of jurisdiction 80 can be dismantled in second subdivision plays the effect of strutting when excavating second subdivision space 8, need demolish when communicating with first subdivision space 7. The duct piece 80 can be dismantled in second part adopts the convenient structure of dismantling of foretell interim steel member, and this place is no longer repeated.
As shown in fig. 11, the first detachable duct piece 70 of the first segmental space 7 is adjacent to the second detachable duct piece 80 of the second segmental space 8, and plays a role in supporting the underground space to be excavated; the first partial permanent segment 71 and the second partial permanent segment 81 are located at the edge of an underground space to be excavated, support the soil body, and prevent the falling of dregs and surrounding rocks to cause safety accidents.
As shown in figure 12, when the second part space 8 is excavated, the excavation is stopped and the inner components of the heading machine are transported out using a peel breaking technique to leave the heading machine housing in the ground as a permanent support structure.
The shelling and disassembling technology of the heading machine mentioned in this embodiment can be referred to as "research on shelling and disassembling technology of the shield machine in the receiving end hole of the subway tunnel" published in "municipal technology" 2 nd 2017 by yodong et al. The unshelling and disassembling technology comprises the steps of shield tunneling machine trolley disconnection and transportation, jack disassembly, cutter head disassembly and the like.
As shown in fig. 13, inside waterproof construction is carried out in the first subsection space 7 and the second subsection space 8 after excavation is completed, secondary lining concrete is poured, after the secondary lining concrete is stabilized, the duct piece 70 detachable in the first subsection and the duct piece 80 detachable in the second subsection are detached, and meanwhile, the portion after detachment is subjected to modification treatment, and a main structure and an internal structure are constructed.
In the embodiment, the width of the tunnel portal of the underground space to be excavated is integral multiple of the width of the excavator shell, so that no margin exists between the first sub-space 7 and the second sub-space 8, if the width of the tunnel portal of the underground space to be excavated and the width of the excavator shell cannot form integral multiple, margins are generated after the sub-spaces are excavated, and the margins need to be removed after secondary lining. Fig. 14 is a schematic cross-sectional view of the subterranean space formed by the removal of the first partially removable segment 70 and the second partially removable segment 80.
The main structure is constructed in the main body part of the constructed underground space to form a large underground space, and fig. 15 is a schematic plan view of the large underground space. The working well 1 and the transverse passage 3 are auxiliary structures of a preset underground space, and the starting area is used as the extension of the underground space, so that the area of the underground space is increased.
In the embodiment, when the underground space to be excavated is divided, the size of the underground space to be excavated and the size of the heading machine are considered, so that the underground space to be excavated is divided into two parts. If there are more than two subsection spaces, then need lay permanent section of jurisdiction in the subsection space with the position of treating excavation underground space edge contact, lay the section of jurisdiction of dismantling in other positions to demolish whole section of jurisdiction of dismantling after all subsection space excavations are accomplished, switch on these subsection spaces, thereby make a plurality of subsection spaces make up into required underground space.
Claims (10)
1. A construction method of underground space is characterized by comprising the following steps:
1) construction of a working well: selecting a proper position at the periphery of an underground space to be excavated, and excavating a working well, wherein the working well provides a pilot foundation for underground space construction;
2) constructing a transverse channel: excavating a transverse channel with the size matched with that of the working well by using the working well as a pilot foundation through an underground excavation method, and paving detachable pipe joints on two sides of the transverse channel;
3) structural partitioning: respectively arranging an expanding excavation area and a tunneling construction area on two sides of the transverse channel, wherein the expanding excavation area is used for starting tunneling equipment, and the tunneling construction area, the expanding excavation area and the corresponding transverse channel form an underground space to be excavated;
4) expanding and digging the area for construction: dismantling detachable pipe joints on the side wall of the transverse channel connected with the expanded excavation area, excavating the expanded excavation area, and constructing a main body structure and an internal structure;
5) and (3) construction of a tunneling construction area: and assembling tunneling equipment in the excavation expanding area and/or the transverse channel, dismantling detachable pipe joints on the side wall of the transverse channel connected with the tunneling construction area, excavating the tunneling construction area through the tunneling equipment, and constructing a main structure and an internal structure to complete underground space construction.
2. A construction method of an underground space according to claim 1, wherein in the step 4), vertical expanding excavation is further performed, and after the construction reaches a designed elevation, the main structure and the internal structure are constructed.
3. The underground space construction method according to claim 1, wherein in the step 5), the excavation construction is divided into a plurality of split structural units according to the size of the excavation face of the excavation equipment, the detachable pipe joints corresponding to the split structural units are sequentially removed, excavation is performed by the excavation equipment, and the main structure and the supporting structure are constructed to complete the underground space construction.
4. The underground space construction method according to claim 3, wherein the excavation equipment further performs vertical expanding excavation on each of the split structural units, and after construction reaches a design elevation, the main structure and the internal structure are constructed.
5. An underground space construction method according to claim 4, wherein the detachable pipe joints are provided between adjacent split structural units after the split structural units are excavated by the excavation equipment.
6. An underground space construction method according to claim 5, wherein the detachable pipe joints in the respective split structural units are removed, and the main structure and the internal structure between the adjacent split structural units are constructed to complete the underground space construction.
7. The underground space construction method according to claim 1 or 5, wherein the detachable pipe joint comprises an upper pipe joint main structure and a lower pipe joint main structure, a transition bearing square box is arranged between the upper pipe joint main structure and the lower pipe joint main structure, the transition bearing square box is provided with at least one structural opening, a transition bearing steel plate is further arranged between the transition bearing square box and the upper pipe joint main structure or the lower pipe joint main structure, and a pushing device is arranged in the transition bearing square box.
8. A method for constructing an underground space according to claim 7, wherein a pull ring is provided on the transition bearing steel plate, and the pushing device is a jack.
9. A method of constructing an underground space according to claim 6, wherein after each excavation is completed by one of the sub-units, the internal components of the tunnelling apparatus are disassembled and transported out of the tunnel leaving the casing of the tunnelling apparatus in the formation to act as a permanent support structure.
10. A method for constructing an underground space according to claim 1, wherein in the step 5), a waterproof construction is performed in the underground space where the construction is completed, and a concrete secondary lining is poured.
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Citations (9)
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