CN111270684A - Disassembly-free support rod piece, foundation pit supporting system and construction method of subway station - Google Patents
Disassembly-free support rod piece, foundation pit supporting system and construction method of subway station Download PDFInfo
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- CN111270684A CN111270684A CN202010215212.7A CN202010215212A CN111270684A CN 111270684 A CN111270684 A CN 111270684A CN 202010215212 A CN202010215212 A CN 202010215212A CN 111270684 A CN111270684 A CN 111270684A
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 40
- 238000009412 basement excavation Methods 0.000 claims description 15
- 239000003351 stiffener Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 12
- 238000005266 casting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005452 bending 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
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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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- Environmental & Geological Engineering (AREA)
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Abstract
The application provides a disassembly-free support rod piece, a foundation pit supporting system and a construction method of a subway station. The disassembly-free support rod comprises a chord rod and a reinforcing piece. The two chord members are arranged at intervals up and down, and two ends of each chord member are respectively connected to the enclosure body of the foundation pit supporting system. The reinforcement is connected between the upper chord member and the lower chord member. The application provides a supporting member forms through adopting prefabricated chord member and reinforcement concatenation, not only can avoid the process of on-the-spot concrete construction, can also be used for the station roof with exempting from to tear open the bracing member and in, removed the process of demolising and reinstallating supporting member from to the construction degree of difficulty has been reduced effectively.
Description
Technical Field
The application relates to the technical field of subway station construction, in particular to a disassembly-free support rod piece, a foundation pit supporting system and a construction method of a subway station.
Background
In the process of foundation pit construction of a subway station, in order to prevent soil around the foundation pit from collapsing and flowing into the foundation pit and influencing the development of normal station construction work, the foundation pit needs to be supported. Usually, the enclosure is used for enclosure before excavation, and then the enclosure is supported by using a conventional support rod piece after excavation to prevent the enclosure from losing efficacy, wherein the conventional support rod piece is used as a part of an inner support system of a foundation pit and bears a large amount of support work.
In the prior art, the conventional support rod is generally integrally formed by pouring concrete, so that the conventional support rod needs to be completely dismantled after supporting work is finished, the construction period is long, the workload is large, and the result of high construction difficulty is caused.
Disclosure of Invention
In view of this, the embodiments of the present application are expected to provide a disassembly-free support rod, a foundation pit supporting system, and a construction method for a subway station, so as to solve the problem of high difficulty in construction of the subway station.
In order to achieve the above object, a first aspect of the embodiments of the present application provides a disassembly-free support rod for use in a foundation pit support system for constructing a subway station. The disassembly-free support rod member comprises: the two chord members are arranged at intervals up and down, and two ends of each chord member are respectively connected to the enclosure body of the foundation pit supporting system; and a reinforcement member connected between the upper chord member and the lower chord member.
Further, the chord member comprises a plurality of spliced middle chords and end chords which are respectively spliced at two ends of the middle chords; and the adjacent middle chords and the end chords and the middle chords are connected through flange structures.
Further, the reinforcement includes: and two ends of the first reinforcing part are respectively and orthogonally connected with the chord member at the upper part and the chord member at the lower part.
Further, the distance between two adjacent first reinforcing parts is 1-3 m.
Furthermore, an upper middle chord, a lower middle chord and at least one first reinforcing piece form a middle splicing unit; and/or one end part chord member on the upper part, one end part chord member on the lower part and at least one first reinforcing member form an end part splicing unit.
Furthermore, the reinforcing parts also comprise second reinforcing parts, and the two second reinforcing parts are symmetrically arranged in the middle of the disassembly-free support rod piece; one end of each second reinforcing piece is arranged in the middle of the chord member at the upper part, and the other end of each second reinforcing piece is arranged at the joint of the adjacent first reinforcing piece and the chord member at the lower part; or one end of each second reinforcing piece is arranged in the middle of the chord member at the lower part, and the other end of each second reinforcing piece is arranged at the joint of the adjacent first reinforcing piece and the chord member at the upper part.
The exempt from to tear open support rod that the first aspect of this application embodiment provided forms through adopting prefabricated chord member and reinforcement concatenation, owing to exempt from to tear open the partial structure coincidence of support rod and station roof, therefore exempt from to tear open the support rod and accomplish the supporting task to the enclosure after, needn't demolish, continue to provide the support for the station roof as a part of station roof to the construction degree of difficulty has been reduced.
A second aspect of an embodiment of the present application provides a foundation pit supporting system, including: the enclosure body is internally excavated to form a foundation pit; and the disassembly-free support rod piece is arranged on the enclosure body at intervals and is positioned above the foundation pit.
Further, the enclosure body comprises enclosure piles, crown beams and retaining walls, the enclosure piles are internally excavated to form the foundation pit, the crown beams are connected to the top ends of the enclosure piles, and the retaining walls are connected to the upper parts of the crown beams; the chord member on the upper part is connected to the crown beam, and the chord member on the lower part is connected to the fender pile.
Furthermore, the foundation pit supporting system also comprises a supporting body positioned in the foundation pit, and two ends of the supporting body are connected to the two walls opposite to the fender post.
The foundation pit supporting system provided by the second aspect of the embodiment of the present application has the same technical effect due to the support member provided by any one of the above embodiments, and is not described herein again.
A third aspect of the embodiments of the present application provides a construction method for a subway station, which uses the foundation pit supporting system provided in any one of the above embodiments. The construction method comprises the following steps: constructing an enclosure body of the foundation pit supporting system; excavating a foundation pit in the enclosure body to a preset first depth; installing the disassembly-free support rod piece on the enclosure body; excavating the foundation pit to a preset second depth; and constructing a main body frame of the station, and constructing the position of the disassembly-free support rod piece to form a station top plate.
The construction method of the subway station provided by the embodiment of the application has the same technical effect as the foundation pit supporting system provided by any one of the embodiments, and is not repeated herein.
Drawings
Fig. 1 is a schematic structural diagram of a foundation pit supporting system according to an embodiment of the present disclosure;
FIG. 2a is a front view of an intermediate chord member according to an embodiment of the present application in one direction;
FIG. 2b is a side view of the flange structure of FIG. 2 a; and
fig. 3 is a flowchart of a construction method of a subway station according to an embodiment of the present application.
Description of reference numerals:
100. the disassembly-free support rod piece; 1. a chord member; 11. a middle chord; 12. an end chord; 2. a reinforcement; 21. a first reinforcement; 22. a second reinforcement; 3. a flange structure; 31. mounting holes; 41. a middle splicing unit; 42. an end splicing unit.
200. An enclosure; 210. a fender pile; 211. a second pre-buried connecting piece; 220. a crown beam; 221. a first pre-buried connecting piece; 230. a retaining wall; 300. and a support body.
410. A station roof; 420. a middle plate of a station; 430. a station floor; 440. and (4) a column.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
The directional terms described in this application are used only for convenience in describing the application and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
In the process of constructing the foundation pit of the subway station, the enclosure body 200 is generally constructed before excavation, and then the foundation pit supporting system is continuously constructed in the foundation pit while excavation is performed from top to bottom. And when the lowest end is excavated, the subway station is built from bottom to top, and in the process, the partial structure of the foundation pit supporting system is dismantled from bottom to top. The detachment-free support bars 100 serve as the first support of the foundation pit supporting system, which is installed first and is removed last when the station roof 410 needs to be constructed last, so that the detachment-free support bars 100 undertake important supporting work in the foundation pit supporting system. In the prior art, the conventional support bars are usually formed by casting concrete in situ, and after the supporting work is completed, the conventional support bars are usually removed by chiseling, and then the station roof 410 is reconstructed at the corresponding position. Therefore, not only is a longer construction period caused, but also a certain degree of resource waste is caused.
In view of the above, a first aspect of the embodiments of the present application provides a disassembly-free support bar 100, please refer to fig. 1, for use in a foundation pit supporting system for constructing a subway station. The detachment-free support link 100 includes a chord member 1 and a reinforcing member 2. The two chord members 1 are arranged at intervals up and down, and two ends of each chord member 1 are respectively connected to the enclosure body 200 of the foundation pit supporting system. The stiffening element 2 is connected between the upper chord member 1 and the lower chord member 1.
In one embodiment, please refer to fig. 1, which illustrates an application of the non-dismantling support bar 100 provided in the present application in a foundation pit supporting system for constructing a subway station. The excavation supporting system includes an enclosure 200 and a disassembly-free support bar 100. A foundation pit is formed by digging in the enclosure 200, and a plurality of disassembly-free support rods 100 are arranged on the enclosure 200 at intervals and above the foundation pit. The disassembly-free support bars 100 are arranged between two parallel walls of the enclosure 200 to provide a resistance force perpendicular to the inner wall of the foundation pit to the enclosure 200, thereby improving the support strength of the enclosure 200. The disassembly-free support rod member 100 provided by the application is connected between the prefabricated upper and lower parallel chord member members 1 by adopting the prefabricated reinforcement member 2, so that the disassembly-free support rod member 100 is formed.
When it is required to construct the station roof 410, the disassembly-free support bars 100 have completed the supporting work of the enclosure 200, and at this time, they can be left as a part of the station roof 410 without being disassembled.
The application provides a exempt from to tear open support member 100 forms owing to adopt prefabricated chord member 1 and the concatenation of reinforcement 2 to the construction process of traditional cast in situ concrete has been removed from. And it can be used as a part of the station roof 410 after the supporting work of the enclosure 200 is completed, thereby also eliminating the dismantling work of the dismantling-free support bar 100. Therefore, the disassembly-free support bar 100 not only saves construction time, but also improves the utilization rate of resources.
Preferably, in order to secure the supporting strength of the chord member 1 and the reinforcing member 2 while reducing the cost, both are cast with concrete.
Further, in an embodiment, referring to fig. 1, in the non-dismantling support rod 100 provided by the present application, the chord member 1 includes a plurality of split middle chords 11 and end chords 12 split at two ends of the plurality of middle chords 11. The adjacent middle chords 11 and the end chords 12 and the middle chords 11 are connected by the flange structure 3, see fig. 2a and 2 b. By splicing the plurality of middle chords 11 and the end chords 12 at the two ends to form the chord member 1, the number of the middle chords 11 can be flexibly selected in the assembling process according to the required length during construction.
Specifically, referring to fig. 2a and 2b, the flange structures 3 are disposed at the ends of the middle chords 11 or the end chords 12, mounting holes 31 are formed around the flange structures near the boundaries, the flange structures 3 are fitted between adjacent middle chords 11 or between the middle chords 11 and the end chords 12, and the mounting holes 31 of the two flange structures 3 are aligned and then fastened by bolts. When the bolt needs to be detached, the bolt is detached. This connected mode is simple high-efficient, and the dismouting of being convenient for is convenient for reuse middle chord 11 and tip chord 12.
In one embodiment, referring to fig. 1, in the non-dismantling support rod 100 provided by the present application, the stiffener 2 includes a first stiffener 21, two ends of which are respectively orthogonally connected to the upper chord member 1 and the lower chord member 1. By arranging the first reinforcing member 21 to be orthogonally connected to the upper chord member 1 and the lower chord member 1, respectively, the first reinforcing member 21 provides the chord member 1 with a supporting force in the vertical direction.
In an embodiment, not shown, in the detachment-free support bar 100 provided by the present application, in order to ensure the strength of the detachment-free support bar 100 itself and prevent the accident that the detachment-free support bar 100 fails to support the enclosure 200, the distance between two adjacent first reinforcing members 21 is 1m to 3m, for example, may be 1.5m, 1.8m, 2m, 2.4m, 2.7m, or 3m, so as to avoid the excessively long interval between the first reinforcing members 21, and the strength of the detachment-free support bar 100 is low, so that it is not enough to effectively support the enclosure 200.
In an embodiment, referring to fig. 1, in the non-dismantling support rod 100 provided by the present application, an upper middle chord 11, a lower middle chord 11 and at least one first reinforcing member 21 form a middle splicing unit 41. Specifically, the intermediate splicing unit 41 may include one first reinforcing member 21, or may include 2 or more first reinforcing members 21, so as to be selected according to actual construction requirements. During the field construction, the intermediate splicing unit 41 may be spliced as a whole. Therefore, the prefabricated middle splicing units 41 can be spliced well before construction, and the time of field construction is further shortened.
In one embodiment, referring to fig. 1, the non-dismantling support rod 100 provided by the present application includes an upper end chord 12, a lower end chord 12 and at least one first reinforcing member 21, which form an end splicing unit 42. Like the middle splicing unit 41, the end splicing units 42 can be spliced well before construction, so that on-site splicing is avoided, the construction difficulty is reduced, and the on-site construction time is saved.
It can be understood that, when the middle splicing units 41 and the end splicing units 42 are adopted simultaneously, in the process of field construction, the assembling work of the on-site disassembly-free support rod member 100 can be completed only by splicing a plurality of middle splicing units 41 between the two end splicing units 42, so that the assembling and disassembling time of the on-site disassembly-free support rod member 100 is greatly reduced.
It should be noted that the intermediate joint unit 41 may be formed by respectively casting the intermediate chord 11 and the first reinforcing member 21 with concrete and then connecting them together with a connecting member, or may be integrally formed during casting with concrete. Similarly, the end splicing unit 42 may be formed by respectively casting the end chords 12 and the first reinforcing members 21 with concrete and then connected together by connecting members to form the end splicing unit 42, or may be integrally formed during casting with concrete.
In one embodiment, the present application provides a detachment-free support bar 100, wherein the reinforcement member 2 further includes a second reinforcement member 22. The two second reinforcing members 22 are symmetrically disposed at the middle portion of the detachment-free support bar 100. One end of each second stiffening member 22 is arranged in the middle of the upper chord member 1 and the other end is arranged at the junction of the adjacent first stiffening member 21 and the lower chord member 1. Thus, the support strength of the detachment-free support rod 100 can be improved, and further, the detachment-free support rod 100 can be prevented from being deformed and other breakage accidents. Particularly in the subway station, it is necessary to construct the vertical column 440 in the middle of the station roof 410, and the supporting strength of the station roof 410 can be improved by providing the second reinforcement 22.
Alternatively, in an embodiment, please refer to fig. 1, in the detachment-free support bar 100 provided in the present application, one end of each second reinforcement member 22 is disposed in the middle of the lower chord member 11, and the other end is disposed at the connection between the adjacent first reinforcement member 21 and the upper chord member 1. In this embodiment, the technical solution of the first embodiment, in which one end of the second reinforcing member 22 is disposed in the middle of the upper chord member 11, has the same technical effect, and is not described herein again.
A second aspect of an embodiment of the present application provides an excavation supporting system, please refer to fig. 1. The foundation pit supporting system comprises the enclosure 200 and the disassembly-free support bar 100 provided by any one of the above embodiments. A foundation pit is formed by digging in the enclosure 100, and a plurality of disassembly-free support bars 100 are arranged on the enclosure 200 at intervals and above the foundation pit.
The foundation pit supporting system provided by the embodiment of the application has the same technical effects due to the adoption of the disassembly-free supporting rod piece 100 provided by any one of the above embodiments, and the details are not repeated herein.
Further, in an embodiment, referring to fig. 1, in the foundation pit supporting system provided by the present application, the enclosure body 200 includes enclosure piles 210, crown beams 220, and retaining walls 230. A foundation pit is formed by digging in the fender pile 210, a crown beam 220 is connected to the top end of the fender pile 210, and a retaining wall 230 is connected to the upper portion of the crown beam 220. The upper chord members 1 are attached to the crown beams 220 and the lower chord members 1 are attached to the fender posts 210. It will be appreciated that, since the chord member 1 does not need to be removed after the bracing work is completed, the chord member 1 and the enclosure 200 can be permanently connected, and the more tightly the chord member 1 and the enclosure are connected, the higher the supporting reliability is.
It is understood that the connection form of the upper chord member 1 and the crown beam 220, and the connection form of the lower chord member 1 and the fender post 210 can be connected through flanges, and can also be in the form of pouring concrete at the connection place.
In a preferred embodiment, referring to fig. 1, in the foundation pit supporting system provided by the present application, the top beam 220 has a first pre-buried connector 221, and the upper chord member 1 is connected to the top beam 220 through the first pre-buried connector 221. Specifically, the first pre-embedded connection member 221 may be a pre-embedded anchor bolt or a bolt, and the upper chord member 1 should have a fitting hole matched with the first pre-embedded connection member. Through the first pre-buried connecting piece 221, not only is the connecting strength between the upper chord member 1 and the crown beam 220 improved, but also the convenience of connection between the upper chord member and the crown beam is improved.
In an embodiment, referring to fig. 1, in the foundation pit supporting system provided by the present application, the fender pile 210 has a second pre-embedded connector 211, and the chord member 1 at the lower portion is connected to the fender pile 210 through the second pre-embedded connector 211. Specifically, the first fastener driving member 221 may be a fastener bolt or a bolt, and the lower chord member 2 should have a fitting hole for fitting. In addition, the steel members can be embedded at the matching position of the two members, and the two members are connected in a welding mode.
In one embodiment, referring to fig. 1, the foundation pit supporting system provided by the present application further includes a supporting body 300 located in the foundation pit. The supporting body 300 is coupled at both ends thereof to the two opposite walls of the enclosure 200. It can be understood that, as the excavation depth of the excavation increases, it is not sufficient to support the enclosure 200 only by means of the detachment-free support bars 100, and it is necessary to continuously install the support bodies 300 on the walls at both ends of the enclosure 200 to provide effective support to the enclosure 200. According to the difference of the depth of the foundation pit and the difference of the distance between the two opposite walls of the enclosure 200 in the foundation pit, the supporting force required by the enclosure 200 is different, so that a proper number of supporting bodies 300 can be arranged according to the requirements of site construction.
In one embodiment, the present application provides an excavation supporting system in which the support body 300 is made of steel. It can be understood that the bending strength of the steel is high, the steel can be recycled, the supporting requirement can be met, and the resource utilization rate can be improved.
It should be noted that, in the process of sequentially building the station bottom plate 430, the station middle plate 420 and the station top plate 410 from bottom to top in the subway station, the support bodies 300 need to be removed one by one in due time, so that the support bodies 300 provide support for the enclosure body 200 and do not affect the construction work of the subway station.
A third aspect of the embodiments of the present application provides a construction method for a subway station, please refer to fig. 3, where with the adoption of the foundation pit supporting system provided in any one of the above embodiments, the construction method includes:
s1, constructing an enclosure body 200 of a foundation pit supporting system;
s2, excavating a foundation pit in the enclosure 200 to a preset first depth;
s3, mounting the disassembly-free support rod piece 100 on the enclosure body 200;
s4, excavating the foundation pit to a preset second depth;
and S5, constructing a main body frame of the station, and constructing and forming a station top plate 410 at the position of the non-dismantling support rod piece 100.
The construction method of the subway station provided by the embodiment of the application has the same technical effect due to the adoption of the foundation pit supporting system provided by any one of the above embodiments, and is not repeated herein.
It should be noted that, in the process of excavating the foundation pit, the non-detachable support bar 100 needs to be installed between the walls of the enclosure 200, and the preset first depth in step S2 is the depth at which the non-detachable support bar 100 can be constructed, which is determined according to the preset installation position of the non-detachable support bar 100. And continuously excavating the foundation pit, wherein in the process of excavating the foundation pit, the support body 300 is required to be installed at a corresponding depth according to the bearing capacity of the enclosure body 200 and the width of the foundation pit.
According to the position of the designed station bottom plate 430, when digging to the second preset depth, namely when the station bottom plate 430 can be constructed, the main frame of the station begins to be constructed without digging downwards, and comprises the station bottom plate 430, a station wall body, a stand column 440 and a station middle plate 420. It is understood that the support body 300 should be sequentially removed from the bottom up in the process of constructing the main body frame of the station from the bottom up.
The various embodiments/implementations provided herein may be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides an exempt from to tear open support rod spare for in the excavation supporting system of construction subway station, its characterized in that, exempt from to tear open support rod spare includes:
the two chord members are arranged at intervals up and down, and two ends of each chord member are respectively connected to the enclosure body of the foundation pit supporting system; and
a stiffener connected between the upper chord member and the lower chord member.
2. The detachment-free support link of claim 1,
the chord member comprises a plurality of spliced middle chords and end chords which are respectively spliced at two ends of the middle chords;
and the adjacent middle chords and the end chords and the middle chords are connected through flange structures.
3. The detachment-free support link according to claim 1 or 2, wherein the reinforcing member includes:
and two ends of the first reinforcing part are respectively and orthogonally connected with the chord member at the upper part and the chord member at the lower part.
4. The detachment-free support bar according to claim 3, wherein a distance between adjacent two of the first reinforcing members is 1m to 3 m.
5. The detachment-free support link of claim 3, wherein an upper one of the intermediate chords, a lower one of the intermediate chords, and at least one of the first stiffeners constitute an intermediate splice unit; and/or the presence of a gas in the gas,
one end part chord member on the upper part, one end part chord member on the lower part and at least one first reinforcing member form an end part splicing unit.
6. The detachment-free support bar of claim 3, wherein the reinforcing members further comprise second reinforcing members symmetrically disposed at a middle portion of the detachment-free support bar;
one end of each second reinforcing piece is arranged in the middle of the chord member at the upper part, and the other end of each second reinforcing piece is arranged at the joint of the adjacent first reinforcing piece and the chord member at the lower part; or the like, or, alternatively,
one end of each second reinforcing piece is arranged in the middle of the chord member at the lower part, and the other end of each second reinforcing piece is arranged at the joint of the adjacent first reinforcing piece and the chord member at the upper part.
7. An excavation supporting system, comprising:
the enclosure body is internally excavated to form a foundation pit; and
the disassembly-free support rod of any one of claims 1 to 6, wherein a plurality of the disassembly-free support rods are arranged on the enclosure body at intervals and above the foundation pit.
8. The excavation supporting system according to claim 7, wherein the enclosure body includes an enclosure pile hollowed to form the excavation, a crown beam attached to a top end of the enclosure pile, and a retaining wall attached to an upper portion of the crown beam;
the chord member on the upper part is connected to the crown beam, and the chord member on the lower part is connected to the fender pile.
9. The excavation supporting system of claim 7 or 8, further comprising a support body located within the excavation, the support body having two ends connected to the two walls opposite the fender post.
10. A construction method of a subway station, which adopts the foundation pit supporting system of any one of claims 7 to 9, characterized in that the construction method comprises:
constructing the enclosure body of the foundation pit supporting system;
excavating a foundation pit in the enclosure body to a preset first depth;
installing the disassembly-free support rod piece on the enclosure body;
excavating the foundation pit to a preset second depth;
and constructing a main body frame of the station, and constructing the position of the disassembly-free support rod piece to form a station top plate.
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| CN202010215212.7A CN111270684B (en) | 2020-03-24 | 2020-03-24 | Disassembly-free support rod piece, foundation pit support system and subway station construction method |
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| CN202010215212.7A CN111270684B (en) | 2020-03-24 | 2020-03-24 | Disassembly-free support rod piece, foundation pit support system and subway station construction method |
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| CN104060617A (en) * | 2014-06-30 | 2014-09-24 | 宁波冶金勘察设计研究股份有限公司 | Prefabricated internal support system and construction method for foundation pit support system |
| CN104878763A (en) * | 2015-05-29 | 2015-09-02 | 朱奎 | Basement supporting structure of main building with podium building |
| CN205557537U (en) * | 2016-04-27 | 2016-09-07 | 四川志德岩土工程有限责任公司 | Supporting structure of foundation pit |
| CN205875209U (en) * | 2016-07-22 | 2017-01-11 | 中铁第一勘察设计院集团有限公司 | Temporary road surface system supports with concrete and closes subway station half range bedding structure of establishing |
| CN206090577U (en) * | 2016-08-23 | 2017-04-12 | 辽宁紫竹桩基础工程股份有限公司 | Steel sheet pile supports in strutting combination welded truss |
| CN107675711A (en) * | 2017-09-01 | 2018-02-09 | 广州宏途设备工程有限公司 | A kind of steel pipe support structure for exempting to tear support open |
| CN107975038A (en) * | 2017-10-18 | 2018-05-01 | 广州地铁设计研究院有限公司 | A kind of cap excavation method temporary support makees the support of permanent structure concrete and its construction method |
| CN212316935U (en) * | 2020-03-24 | 2021-01-08 | 中铁第四勘察设计院集团有限公司 | Disassembly-free support rod piece and foundation pit supporting system |
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