CN111058455A - Deep foundation pit supporting structure and deep foundation pit construction method - Google Patents
Deep foundation pit supporting structure and deep foundation pit construction method Download PDFInfo
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- CN111058455A CN111058455A CN201911199461.5A CN201911199461A CN111058455A CN 111058455 A CN111058455 A CN 111058455A CN 201911199461 A CN201911199461 A CN 201911199461A CN 111058455 A CN111058455 A CN 111058455A
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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
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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Abstract
The invention provides a deep foundation pit supporting structure and a deep foundation pit construction method. When the deep foundation pit is constructed, the deep foundation pit supporting structure can be used for starting excavation when a second foundation pit of the deep foundation pit is advanced to a first foundation pit to finish underground second-layer floor construction, compared with the construction process that the second foundation pit is intelligently excavated after the basement structure of the first foundation pit is +/-0.00 in the original foundation pit construction, the construction progress is accelerated, the construction period of the underground structure is shortened, and the 'time-space effect' of foundation pit engineering is prevented from influencing the built buildings, pipelines, adjacent subways and the like in the surrounding environment.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering design and construction, in particular to a deep foundation pit supporting structure and a deep foundation pit construction method.
Background
With the development of social production, more and more foundation pits need to be excavated around urban areas or residential areas. Particularly, in China Shanghai, people face greater population pressure and land pressure, and in addition, the requirement of people for travel convenience in modern society is becoming strict, and project site selection is often near subway light rails or elevated frames. The underground station and the 50m range outside the tunnel structure are regulated by Shanghai and Suzhou to be subway protection areas; wherein, the 20m range close to the subway is a special protection area, and the requirement in the range is more strict than that of a general protection area. The enclosure structure entering the general protection area of the subway needs to consider the influence on the subway structure, and the enclosure structure can take reinforcing measures. For a deep foundation pit entering a special protection area of a subway, an underground continuous wall enclosure form is required, if the side is long, a partition wall needs to be arranged, the side is divided into a plurality of small blocks, and during construction, spaced cabin picking and excavation are needed to control foundation pit displacement caused by long edge effect. For the foundation pit constructed in different areas, please refer to fig. 1, which is a schematic structural diagram of the existing deep foundation pit construction condition. As shown in fig. 1, it is generally required to perform excavation of the first foundation pit, and after the underground structure of the first foundation pit is constructed to ± 0.000, a second foundation pit is constructed. According to the construction process, the following technical problems exist: the total construction period is inevitably prolonged, and the space-time effect caused by the construction period cannot be estimated.
Therefore, in order to better solve the construction progress of the partition construction of the deep and large foundation pit within the range of the subway and light rail protection area, certain technical measures in design and construction are required, so that the aims of shortening the construction period, reducing the influence on the surrounding environment and saving the cost are fulfilled. In this regard, those skilled in the art are constantly seeking solutions to meet this need.
Disclosure of Invention
The invention aims to provide a deep foundation pit supporting structure and a deep foundation pit construction method, and aims to solve the problem of space-time effect caused by slow construction progress and long construction period of the existing deep and large foundation pit partition construction.
In order to solve the technical problem, the present invention provides a deep foundation pit supporting structure, wherein the deep foundation pit is divided into a first foundation pit and a second foundation pit by a partition wall, and the deep foundation pit supporting structure comprises: and in the support changing construction process, the first steel inclined support and the second steel inclined support are sequentially and respectively installed on the underground two-layer floor slab and the underground one-layer floor slab of the first foundation pit.
Optionally, in the deep foundation pit supporting structure, a first end of the first steel diagonal brace is fixed to the surrounding purlin of the partition wall, and a second end of the first steel diagonal brace is fixed to the bracket at the node of the structural beam slab column of the first foundation pit.
Optionally, in the deep foundation pit supporting structure, a first end of the second steel diagonal brace is fixed to the enclosing purlin of the partition wall, and a second end of the second steel diagonal brace is fixed to the bracket at the node of the structural beam slab column of the first foundation pit.
Optionally, in the deep foundation pit supporting structure, the bracket is a concrete bracket.
The invention also provides a deep foundation pit construction method, wherein the deep foundation pit is divided into a first foundation pit and a second foundation pit by a partition wall, the deep foundation pit construction method uses the deep foundation pit supporting structure to support the deep foundation pit, and the deep foundation pit construction method comprises the following steps:
the second foundation pit starts earth excavation after the first foundation pit completes the construction of the second floor of the underground; before the first underground floor of the first foundation pit is not formed, arranging a first steel inclined strut on the second underground floor of the first foundation pit; and before the underground floor top plate of the first foundation pit is not formed, arranging a second steel inclined strut on the underground floor of the first foundation pit.
Optionally, the deep foundation pit construction method includes the following steps:
s1: after the second foundation pit finishes the first support, removing the third support in the first foundation pit, and starting the construction of the underground second floor slab and the bracket of the first foundation pit;
s2: after the underground second floor slab and the bracket of the first foundation pit reach the design strength, removing a second support in the first foundation pit, and erecting a first steel inclined strut on the underground second floor slab of the first foundation pit;
s3: excavating the earthwork of the second foundation pit, starting construction and maintenance of a second support of the second foundation pit after the earthwork is excavated to the bottom elevation of the second support, and excavating the next layer of earthwork of the second foundation pit after the second support of the second foundation pit is maintained to the designed strength;
s4: starting the construction of the first foundation pit for the first floor and the bracket, and starting the construction and maintenance of the third support of the second foundation pit after the earthwork of the second foundation pit is excavated to the bottom elevation of the third support;
s5: after the first underground floor of the first foundation pit and the bracket reach the designed strength, erecting a second steel diagonal brace on the first underground floor of the first foundation pit, and dismantling the first steel diagonal brace on the second underground floor of the first foundation pit;
s6: dismantling a first support in the first foundation pit, and starting construction and maintenance of a bottom plate and a pit structure of the second foundation pit;
s7: after the bottom plate and the pit structure of the second foundation pit are maintained to the designed strength, removing the third support of the second foundation pit, and starting the construction of the underground second floor slab of the second foundation pit;
s8: starting the construction of the top plate of the first underground layer of the first foundation pit, dismantling the second support of the second foundation pit after the second underground layer of the second foundation pit is maintained to the designed strength, and starting the construction and maintenance of the first underground layer of the second foundation pit;
s9: after the underground floor slab of the second foundation pit is maintained to the set design strength, removing the first support of the second foundation pit and the second steel inclined strut on the underground floor slab of the first foundation pit;
s10: the method comprises the following steps that a top ring beam, a ground connecting wall and a water stop pile at the position of a partition wall are subjected to chamber jumping and chiseling to a first preset height on an underground floor slab away from a deep foundation pit;
s11: starting construction of the underground layer top plate of the second foundation pit, and connecting the underground layer top plate of the second foundation pit and the underground layer top plate of the first foundation pit into a whole;
s12: the position of the partition wall is continuously dug downwards to a second preset height position on an underground two-layer floor slab away from the deep foundation pit, and an underground one-layer top plate of the second foundation pit and an underground one-layer top plate of the first foundation pit are connected into a whole;
s13: chiseling the position of the partition wall downwards to a third preset height away from the bottom plate of the deep foundation pit, and connecting the underground second floor of the second foundation pit and the underground second floor of the first foundation pit into a whole;
s14: and continuously chiseling the position of the partition wall downwards to the bottom of the bottom plate of the deep foundation pit, and connecting the large bottom plate of the second foundation pit and the large bottom plate of the second foundation pit into a whole.
Optionally, in the deep foundation pit construction method, the first predetermined height is 0.5 m.
Optionally, in the deep foundation pit construction method, the second predetermined height is 0.5 m.
Optionally, in the deep foundation pit construction method, the third predetermined height is 0.5 m.
In the deep foundation pit supporting structure and the deep foundation pit construction method provided by the invention, the deep foundation pit supporting structure comprises a first steel inclined strut and a second steel inclined strut, and the first steel inclined strut and the second steel inclined strut are sequentially and respectively installed on the two underground floors and the one underground floor of the first foundation pit in the support replacement construction process. When the deep foundation pit is constructed, the deep foundation pit supporting structure can be used for starting excavation when a second foundation pit of the deep foundation pit is advanced to a first foundation pit to finish underground second-layer floor construction, compared with the construction process that the second foundation pit is intelligently excavated after the basement structure of the first foundation pit is +/-0.00 in the original foundation pit construction, the construction progress is accelerated, the construction period of the underground structure is shortened, and the 'time-space effect' of foundation pit engineering is prevented from influencing the built buildings, pipelines, adjacent subways and the like in the surrounding environment.
Drawings
FIG. 1 is a schematic structural diagram of a construction condition of a conventional deep foundation pit;
FIG. 2 is a schematic structural diagram of a deep foundation pit construction condition according to an embodiment of the present invention;
fig. 3 is a miniature image of a deep foundation pit construction method according to an embodiment of the present invention;
fig. 4 is a construction view when S1 is performed in the deep foundation pit construction method of the present invention;
fig. 5 is a construction view when S2 is performed in the deep foundation pit construction method of the present invention;
fig. 6 is a construction view when S3 is performed in the deep foundation pit construction method of the present invention;
fig. 7 is a construction view when S4 is performed in the deep foundation pit construction method of the present invention;
fig. 8 is a construction view when S5 is performed in the deep foundation pit construction method of the present invention;
fig. 9 is a construction view when S6 is performed in the deep foundation pit construction method of the present invention;
fig. 10 is a construction view when S7 is performed in the deep foundation pit construction method of the present invention;
fig. 11 is a construction view when S8 is performed in the deep foundation pit construction method of the present invention;
fig. 12 is a construction view when S9 is performed in the deep foundation pit construction method of the present invention;
fig. 13 is a construction view when S10 is performed in the deep foundation pit construction method of the present invention;
fig. 14 is a construction view when S11 is performed in the deep foundation pit construction method of the present invention;
fig. 15 is a construction view when S12 is performed in the deep foundation pit construction method of the present invention;
fig. 16 is a construction view when S13 is performed in the deep foundation pit construction method of the present invention;
fig. 17 is a construction view when S14 is performed in the deep foundation pit construction method of the present invention.
In fig. 3 to 17:
11-a first steel diagonal brace;
12-a second steel diagonal brace;
2-a dividing wall;
3-enclosing purlin;
4-bracket;
b0-underground one-layer roof;
b1-underground floor slab;
b2-underground two-storey floor.
Detailed Description
The deep foundation pit supporting structure and the deep foundation pit construction method according to the present invention will be described in further detail with reference to the accompanying drawings and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a deep foundation pit construction condition according to an embodiment of the present invention; fig. 3 is a miniature image of the deep foundation pit construction method in an embodiment of the present invention. Referring to fig. 2 and 3, the deep foundation pit to which the deep foundation pit supporting structure of the present invention is applied is divided into a first foundation pit and a second foundation pit by a partition wall 2. The deep foundation pit supporting structure of the invention comprises: first steel bracing 11 and second steel bracing 12, in the construction process of trading the brace, first steel bracing 11 with second steel bracing 12 successively installed respectively on two layers of floor B2 in the underground of first foundation ditch and on one layer of floor B1 in the underground.
As shown in fig. 3, a first end of the first steel diagonal brace 11 is fixed on the purlin 3 of the dividing wall 2, and a second end of the first steel diagonal brace 11 is fixed on the bracket 4 at the structural beam slab column node of the first foundation pit; and a first end of the second steel diagonal brace 12 is fixed on the surrounding purlin 3 of the partition wall 2, and a second end of the second steel diagonal brace 12 is fixed on the bracket 4 at the node of the structural beam slab column of the first foundation pit. Preferably, the bracket 4 is a concrete bracket.
Correspondingly, the embodiment also provides a deep foundation pit construction method. The method for constructing a deep foundation pit according to the present embodiment will be described in detail with reference to fig. 3 to 17.
Fig. 3 is a miniature image of the deep foundation pit construction method. As shown in fig. 3, the deep foundation pit construction method uses the deep foundation pit supporting structure to support and support the deep foundation pit, and the core points of the construction process of the deep foundation pit construction method are as follows: the second foundation pit starts earth excavation after the first foundation pit completes construction of a second floor slab B2 underground; before the first foundation pit underground floor B1 is not formed, arranging a first steel inclined strut 11 on the first foundation pit underground second floor B2; and before the underground one-layer top plate B0 of the first foundation pit is not formed, arranging a second steel inclined strut 12 on the underground one-layer floor B1 of the first foundation pit. Because the steel inclined struts are arranged at the corresponding positions of the first foundation pit at different stages in the construction process to provide enough supporting force, the condition that the earth of the second foundation pit is excavated in advance is met. Therefore, compared with the construction process of the deep foundation pit shown in fig. 1, the second foundation pit is excavated after the first foundation pit basement structure is subjected to +/-0.00, and the excavation is started in advance when the first foundation pit basement structure finishes the second floor slab B2, so that the construction progress is accelerated, and the construction period of the underground structure is shortened.
In order to better understand the construction process of the deep foundation pit construction method of the present invention, refer to fig. 4 to 16 for understanding.
Firstly, referring to fig. 4, step S1 is executed, after the first support of the second foundation pit is completed, the third support of the first foundation pit is removed, and the construction of the second floor B2 and the bracket 4 of the first foundation pit is started;
next, referring to fig. 5, step S2 is executed, after the second floor B2 and the corbels 4 of the first foundation pit reach the design strength, the second support in the first foundation pit is removed, and the first steel diagonal brace 11 is erected on the second floor B2 of the first foundation pit;
then, referring to fig. 6, step S3 is executed to perform excavation construction on the earthwork of the second foundation pit, start construction and maintenance of the second support of the second foundation pit after the excavation reaches the bottom elevation of the second support, and excavate the next layer of earthwork of the second foundation pit after the second support of the second foundation pit is maintained to the designed strength; in fact, the next layer of earthwork can be excavated after the second support of the second foundation pit is maintained to 80% of the design strength, and the design strength is preset according to construction requirements.
Next, referring to fig. 7, step S4 is executed to start the construction of the first foundation pit, namely, the first sub-floor B1 and the corbel 4, and after the earthwork of the second foundation pit is excavated to the bottom elevation of the third support, the construction and maintenance of the third support of the second foundation pit are started;
next, referring to fig. 8, step S5 is executed, after the first foundation pit underground floor B1 and the corbels 4 reach the designed strength, the second steel diagonal brace 12 is erected on the first foundation pit underground floor B1, and the first steel diagonal brace 11 on the first foundation pit underground floor B2 is removed;
next, referring to fig. 9, step S6 is executed to remove the first support in the first foundation pit and start the construction and maintenance of the bottom plate and the pit structure of the second foundation pit;
next, referring to fig. 10, step S7 is executed, after the bottom plate and the pit structure of the second foundation pit are maintained to the designed strength, the third support of the second foundation pit is removed, and the construction of the underground second floor B2 of the second foundation pit is started;
next, referring to fig. 11, step S8 is executed to start the construction of the top slab B0 of the first foundation pit, remove the second support of the second foundation pit after the second floor B2 of the second foundation pit is maintained to the designed strength, and start the construction and maintenance of the first floor B1 of the second foundation pit;
next, referring to fig. 12, step S9 is executed, after the underground floor B1 of the second foundation pit is maintained to the set design strength, the first support of the second foundation pit and the second steel diagonal brace 12 on the underground floor B1 of the first foundation pit are removed;
next, referring to fig. 13, step S10 is executed to chisel the top ring beam, the diaphragm wall and the water-stop pile at the position of the partition wall 2 to a first predetermined height above the B1 slab of the underground floor slab at a distance from the deep foundation pit; the first predetermined height is 0.5m in this embodiment.
Next, referring to fig. 14, step S11 is executed to start the construction of the underground roof B0 of the second foundation pit and connect the underground roof B0 of the second foundation pit and the underground roof B0 of the first foundation pit integrally;
next, referring to fig. 15, step S12 is executed to continue to cut the partition wall 2 downward to a second predetermined height above the slab B2 of the second floor underground of the deep foundation pit, and connect the top slab B0 of the second foundation pit and the top slab B0 of the first foundation pit into a whole; the second predetermined height in this embodiment is 0.5 m.
Next, referring to fig. 16, step S13 is executed to continue to cut the partition wall 2 downward to a third predetermined height from the bottom plate of the deep foundation pit, and integrate the second floor B2 of the second foundation pit with the second floor B2 of the first foundation pit; the third predetermined height is 0.5m in this embodiment.
Next, referring to fig. 17, step S14 is executed to continue the downward skip of the partition wall 2 to the bottom of the bottom plate of the deep foundation pit, and the large bottom plate of the second foundation pit are connected into a whole.
In summary, in the deep foundation pit supporting structure and the deep foundation pit construction method provided by the invention, the deep foundation pit supporting structure includes the first steel diagonal brace and the second steel diagonal brace, and in the bracing replacement construction process, the first steel diagonal brace and the second steel diagonal brace are successively and respectively installed on the two underground floors and the one underground floor of the first foundation pit. When the deep foundation pit is constructed, the deep foundation pit supporting structure can be used for starting excavation when a second foundation pit of the deep foundation pit is advanced to a first foundation pit to finish underground second-layer floor construction, compared with the construction process that the second foundation pit is intelligently excavated after the basement structure of the first foundation pit is +/-0.00 in the original foundation pit construction, the construction progress is accelerated, the construction period of the underground structure is shortened, and the 'time-space effect' of foundation pit engineering is prevented from influencing the built buildings, pipelines, adjacent subways and the like in the surrounding environment.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (9)
1. The utility model provides a deep basal pit supporting construction, deep basal pit is first foundation ditch and second foundation ditch for by the divider wall separation, a serial communication port, includes: and in the support changing construction process, the first steel inclined support and the second steel inclined support are sequentially and respectively installed on the underground two-layer floor slab and the underground one-layer floor slab of the first foundation pit.
2. The deep foundation pit supporting structure of claim 1, wherein a first end of the first steel diagonal brace is fixed to an purlin of a dividing wall, and a second end of the first steel diagonal brace is fixed to a corbel at a node of a structural beam slab column of the first foundation pit.
3. The deep foundation pit supporting structure of claim 2, wherein a first end of the second steel diagonal brace is fixed to the purlin of the dividing wall, and a second end of the second steel diagonal brace is fixed to the corbel at the node of the structural beam slab column of the first foundation pit.
4. The deep foundation pit supporting structure of claim 3, wherein the corbel is a concrete corbel.
5. A deep foundation pit construction method for dividing a deep foundation pit into a first foundation pit and a second foundation pit by a partition wall, wherein the deep foundation pit is supported by the deep foundation pit support structure according to any one of claims 1 to 4, the method comprising the steps of:
the second foundation pit starts earth excavation after the first foundation pit completes the construction of the second floor of the underground; before the first underground floor of the first foundation pit is not formed, arranging a first steel inclined strut on the second underground floor of the first foundation pit; and before the underground floor top plate of the first foundation pit is not formed, arranging a second steel inclined strut on the underground floor of the first foundation pit.
6. The deep foundation pit construction method according to claim 5, comprising the steps of:
s1: after the second foundation pit finishes the first support, removing the third support in the first foundation pit, and starting the construction of the underground second floor slab and the bracket of the first foundation pit;
s2: after the underground second floor slab and the bracket of the first foundation pit reach the design strength, removing a second support in the first foundation pit, and erecting a first steel inclined strut on the underground second floor slab of the first foundation pit;
s3: excavating the earthwork of the second foundation pit, starting construction and maintenance of a second support of the second foundation pit after the earthwork is excavated to the bottom elevation of the second support, and excavating the next layer of earthwork of the second foundation pit after the second support of the second foundation pit is maintained to the designed strength;
s4: starting the construction of the first foundation pit for the first floor and the bracket, and starting the construction and maintenance of the third support of the second foundation pit after the earthwork of the second foundation pit is excavated to the bottom elevation of the third support;
s5: after the first underground floor of the first foundation pit and the bracket reach the designed strength, erecting a second steel diagonal brace on the first underground floor of the first foundation pit, and dismantling the first steel diagonal brace on the second underground floor of the first foundation pit;
s6: dismantling a first support in the first foundation pit, and starting construction and maintenance of a bottom plate and a pit structure of the second foundation pit;
s7: after the bottom plate and the pit structure of the second foundation pit are maintained to the designed strength, removing the third support of the second foundation pit, and starting the construction of the underground second floor slab of the second foundation pit;
s8: starting the construction of the top plate of the first underground layer of the first foundation pit, dismantling the second support of the second foundation pit after the second underground layer of the second foundation pit is maintained to the designed strength, and starting the construction and maintenance of the first underground layer of the second foundation pit;
s9: after the underground floor slab of the second foundation pit is maintained to the set design strength, removing the first support of the second foundation pit and the second steel inclined strut on the underground floor slab of the first foundation pit;
s10: the method comprises the following steps that a top ring beam, a ground connecting wall and a water stop pile at the position of a partition wall are subjected to chamber jumping and chiseling to a first preset height on an underground floor slab away from a deep foundation pit;
s11: starting construction of the underground layer top plate of the second foundation pit, and connecting the underground layer top plate of the second foundation pit and the underground layer top plate of the first foundation pit into a whole;
s12: the position of the partition wall is continuously dug downwards to a second preset height position on an underground two-layer floor slab away from the deep foundation pit, and an underground one-layer top plate of the second foundation pit and an underground one-layer top plate of the first foundation pit are connected into a whole;
s13: chiseling the position of the partition wall downwards to a third preset height away from the bottom plate of the deep foundation pit, and connecting the underground second floor of the second foundation pit and the underground second floor of the first foundation pit into a whole;
s14: and continuously chiseling the position of the partition wall downwards to the bottom of the bottom plate of the deep foundation pit, and connecting the large bottom plate of the second foundation pit and the large bottom plate of the second foundation pit into a whole.
7. The deep foundation pit construction method according to claim 6, wherein the first predetermined height is 0.5 m.
8. The deep foundation pit construction method according to claim 6, wherein the second predetermined height is 0.5 m.
9. The deep foundation pit construction method according to claim 6, wherein the third predetermined height is 0.5 m.
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| CN201911199461.5A CN111058455A (en) | 2019-11-29 | 2019-11-29 | Deep foundation pit supporting structure and deep foundation pit construction method |
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| CN201911199461.5A CN111058455A (en) | 2019-11-29 | 2019-11-29 | Deep foundation pit supporting structure and deep foundation pit construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549789A (en) * | 2020-05-08 | 2020-08-18 | 广州金辉建设集团有限公司 | Reinforcing structure for foundation pit support and construction method thereof |
| CN112813984A (en) * | 2020-12-31 | 2021-05-18 | 攀钢集团工程技术有限公司 | Deep foundation pit construction method under complex geological condition |
| CN112982498A (en) * | 2021-01-20 | 2021-06-18 | 广州地铁设计研究院股份有限公司 | Construction method of large foundation pit |
| CN113006083A (en) * | 2021-03-02 | 2021-06-22 | 中建八局南方建设有限公司 | Support changing construction method for foundation pit inner support |
| CN113756331A (en) * | 2021-10-14 | 2021-12-07 | 中国建筑第八工程局有限公司 | Synchronous construction method of adjacent foundation pits |
-
2019
- 2019-11-29 CN CN201911199461.5A patent/CN111058455A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549789A (en) * | 2020-05-08 | 2020-08-18 | 广州金辉建设集团有限公司 | Reinforcing structure for foundation pit support and construction method thereof |
| CN112813984A (en) * | 2020-12-31 | 2021-05-18 | 攀钢集团工程技术有限公司 | Deep foundation pit construction method under complex geological condition |
| CN112813984B (en) * | 2020-12-31 | 2022-07-29 | 攀钢集团工程技术有限公司 | Deep foundation pit construction method under complex geological condition |
| CN112982498A (en) * | 2021-01-20 | 2021-06-18 | 广州地铁设计研究院股份有限公司 | Construction method of large foundation pit |
| CN113006083A (en) * | 2021-03-02 | 2021-06-22 | 中建八局南方建设有限公司 | Support changing construction method for foundation pit inner support |
| CN113756331A (en) * | 2021-10-14 | 2021-12-07 | 中国建筑第八工程局有限公司 | Synchronous construction method of adjacent foundation pits |
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