CN110878555A - Large-span underground space deep foundation pit supporting system and construction method - Google Patents
Large-span underground space deep foundation pit supporting system and construction method Download PDFInfo
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- CN110878555A CN110878555A CN201911158837.8A CN201911158837A CN110878555A CN 110878555 A CN110878555 A CN 110878555A CN 201911158837 A CN201911158837 A CN 201911158837A CN 110878555 A CN110878555 A CN 110878555A
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 239000004567 concrete Substances 0.000 claims abstract description 13
- 238000009412 basement excavation Methods 0.000 claims description 38
- 239000002689 soil Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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- 230000003139 buffering effect Effects 0.000 description 1
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- 238000004134 energy conservation 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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
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Abstract
A large-span underground space deep foundation pit supporting system comprises a deep foundation pit; a plurality of supporting units are continuously arranged on the inner wall of the periphery in the deep foundation pit, and an I-shaped steel sheet pile is arranged between every two adjacent supporting units; the supporting unit comprises prefabricated supporting components which are mutually butted and assembled up and down, left and right, and the prefabricated supporting components at the left end and the right end are fixedly connected to the I-shaped steel sheet pile through bolts; and forming an integral supporting wall on the inner wall around the deep foundation pit. Waterproof plain concrete is poured into the gap between the supporting unit and the foundation of the inner wall of the excavated deep foundation pit. Four edges are respectively provided with an I-shaped steel sheet pile. The invention adopts the prefabricated supporting components to assemble and combine the horizontal and vertical directions around the deep foundation pit and the I-shaped steel sheet pile to form a combined structure, reduces or removes the arrangement of the transverse supports and the diaphragm wall of the large-span deep foundation pit, and solves the problems that the prior art can not expand the working face construction in a large area and the like. Has the advantages of reasonable structure, greatly simplified construction, lower manufacturing cost, environmental protection, investment saving, safety, convenience and the like.
Description
Technical Field
The invention belongs to the technical field of underground space deep foundation pit supporting, and particularly relates to a large-span underground space deep foundation pit supporting system capable of serving as a temporary or permanent support; the invention also relates to a construction method of the large-span underground space deep foundation pit supporting system.
Background
In recent years, high development of urban underground spaces and construction of a large number of high-rise buildings in China are accompanied with a series of engineering technical problems such as large span of underground spaces, deep foundation pits and the like and construction treatment measures to be solved urgently, and numerous researchers continuously seek new methods which are convenient, safe and efficient in construction. The method is expected to find a new technology and a new process of the supporting structure, which can ensure the construction safety, economy and ensure the quality to be reliable, simple and convenient, and is a common pursuit target of builders.
The existing deep foundation pit supporting mode comprises a common supporting structure and a construction method, wherein the common supporting structure comprises a drilling and pouring row pile maintenance wall, an underground continuous wall, a steel sheet pile or a gravity type maintenance wall and the like. For deep foundation pits with slightly poor geological conditions and large span, the method also needs to arrange a transverse inner support, a pile anchor member and the like as a horizontal transverse support. However, the arrangement of the inner support in the deep foundation pit can greatly reduce the construction space in the foundation pit, large-scale construction equipment is difficult to construct in a large area, and the construction cost and the construction period are increased; the measures of pile anchor members are generally difficult to use in a wide range in a limited space due to the limit of the construction red line. The cast-in-situ bored pile has long construction period, high cost, environmental pollution, low cost and other factors.
Disclosure of Invention
The invention aims to solve the first technical problem of providing a large-span underground space deep foundation pit supporting system which is simple in construction process, green and environment-friendly and free of transverse support; the second technical problem to be solved by the invention is to provide a construction method of a large-span underground space deep foundation pit supporting system; the invention can greatly shorten the construction period, can obviously improve the engineering construction efficiency, and the supporting members forming the supporting system are produced in batch prefabrication and standardization.
The technical solution of the present invention for solving the first technical problem is as follows: a large-span underground space deep foundation pit supporting system comprises a deep foundation pit; the method is characterized in that: a plurality of supporting units are continuously arranged on the inner wall of the periphery in the deep foundation pit, and an I-shaped steel sheet pile is arranged between every two adjacent supporting units; the supporting unit comprises prefabricated supporting components which are mutually butted and assembled up and down, left and right, and the prefabricated supporting components at the left end and the right end are fixedly connected to the I-shaped steel sheet pile through bolts; and forming an integral supporting wall on the inner wall around the deep foundation pit.
Waterproof plain concrete is poured into a gap between the supporting unit and the foundation of the inner wall of the excavated deep foundation pit; the prefabricated supporting component adopts Chinese utility model patent with patent number ZL201521112761.2 and name of prefabricated supporting component for underground space construction and assembly; the bottom of the I-shaped steel sheet pile is fixed in the stratum.
According to the soil condition of the deep foundation pit, 4-6 prefabricated supporting members are arranged on each supporting unit in the horizontal direction.
The invention provides a large-span underground space deep foundation pit supporting system which adopts a prefabricated supporting component as a main body, the prefabricated supporting component is arranged around a deep foundation pit in a continuous arch shape, each continuous arch unit forms an annular supporting system along the periphery of the foundation pit, waterproof plain concrete is poured into a gap between the back of the supporting system and an excavated foundation and is filled and tamped, and the supporting system, the supporting unit and an I-shaped steel sheet pile form an integral supporting system. The stress characteristics are as follows: the characteristics of the arch structure and the pressure bearing capacity of concrete are fully utilized for the deep foundation pit supporting structure of the large-span underground space, the action of the soil pressure of the foundation pit side direction can be effectively resisted, the thrust of the soil pressure borne by each arch member in the horizontal direction can be mutually offset and the stress is balanced, and therefore the transverse support of the foundation pit can be reduced or removed; the I-shaped steel sheet pile is used as a vertical upright column, can bear the thrust action of horizontal load transmitted by continuous arches, simultaneously plays roles in fixing arch-shaped prefabricated supporting members and supporting and bending resisting, and commonly bears the soil pressure and the load transmitted from the upper part with the mutually butted and assembled prefabricated supporting members.
The technical solution of the present invention for solving the second technical problem is as follows: a construction method of a deep foundation pit supporting system of a large-span underground space comprises the following steps:
step 1, enabling the I-shaped steel sheet piles to enter the designed elevation of the foundation pit for a depth of at least more than 2m, arranging one I-shaped steel sheet pile at each of four corners, and arranging the rest edges at intervals of 4m, 5m or 6 m.
And 2, calculating the depth and the length of each safe excavation of the deep foundation pit and the support safety coefficient corresponding to the time required by the construction excavation according to the development calculation software related to the construction method and the related parameters of engineering geology, and referring to table 1.
The invention adopts the prefabricated supporting component for underground space construction and assembly provided by the patent number ZL201521112761.2 to assemble and combine the horizontal and vertical directions around the deep foundation pit and the I-shaped steel sheet pile to form a combined structure, reduces or removes the arrangement of the transverse support and the ground connecting wall of the large-span deep foundation pit, and solves the problems that the prior art cannot expand the working face construction in a large area and the like. The deep foundation pit supporting excavation construction method has the advantages of being reasonable in structure, greatly simplified in construction, low in manufacturing cost, green, environment-friendly, investment-saving, safe, convenient and the like, the new direction of deep foundation pit supporting excavation is expanded, the used prefabricated supporting components are prefabricated in batches and produced in a standardized mode, engineering construction efficiency can be remarkably improved, construction quality and safety are guaranteed, and good social benefits and economic benefits are achieved.
After the arched prefabricated supporting members are assembled, two ends of the arched prefabricated supporting members are fixed on the I-shaped steel sheet piles vertically driven into the stratum, the I-shaped steel sheet piles for fixing the prefabricated supporting members are arranged along the periphery of the deep foundation pit at intervals of 5m, the pile length in the depth direction needs to be calculated, and a layer of arched members with ribs is arranged at every 2m of height, so that the effects of transversely spacing beams and strengthening transverse rigidity are achieved; and each continuous arched supporting unit is combined with the I-shaped steel sheet pile to form a closed structure along the periphery of the deep foundation pit, so that a continuous arched prefabricated and assembled annular supporting system is formed. The support is suitable for supporting a deep foundation pit in a large-span underground space, is light and safe, and does not need a structure of a transverse support or a ground connecting wall.
Compared with the prior art, the invention has the main creativity and beneficial effects that:
1. the stress advantage that the soil pressure born by the continuous arch-shaped supporting system is converted into horizontal thrust is applied to the vertical deep foundation pit supporting body structure, the arrangement of the horizontal supports of the deep foundation pit is reduced, the construction working surface is enlarged, and large machinery can carry out layered excavation and is convenient for the outward transportation of earthwork.
2. The I-shaped steel sheet piles which are vertically arranged, the arched prefabricated supporting members which are horizontally arranged and the stiffening rib plate members are simultaneously used in a combined supporting system which is formed in the supporting unit, so that the integral rigidity and the load bearing capacity of the supporting wall body are increased, and the arrangement of the horizontal support of the deep foundation pit is simplified. The construction method has the advantages of reasonable structure, convenience in construction, great reduction in construction difficulty and safety guarantee, environmental friendliness, energy conservation, reduction in engineering investment and the like.
3. The invention uses Chinese utility model patent product ZL201521112761.2, prefabricated support member for underground space construction and assembly, and utilizes the reliability of the functions of the member such as good wave-absorbing and energy-absorbing performance, capability of buffering stress and the like of the light foam concrete, thereby expanding the application range of the patent product and promoting the extension and popularization of the patent product.
Drawings
FIG. 1 is a general floor plan of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an enlarged view of corner A of FIG. 1;
FIG. 4 is a front view of an I-shaped steel sheet pile;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic partial perspective view of FIG. 1;
FIG. 7 is a perspective view of a stiffening rib member;
fig. 8 is a perspective view of a modified prefabricated supporting member of patent No. ZL 201521112761.2;
FIG. 9 is a schematic view of I-shaped steel sheet piles driven into four corners of a deep foundation pit;
FIG. 10 is a schematic view illustrating excavation of a first foundation pit space;
fig. 11 is a schematic view of a first floor of foundation pit space assembled with prefabricated supporting members;
fig. 12 is a schematic view of a gap-filled plain concrete.
In the figure: the method comprises the following steps of 1-deep foundation pit, 2-waterproof plain concrete, 3-prefabricated supporting components, 4-I-shaped steel sheet pile, 5-bolt, 6-nut, 7-bolt hole, 8-stiffening rib plate component, 801-stiffening rib plate, 9-component bolt hole, 10-unearthed soil body of the deep foundation pit, 11-gap and 12-first layer of foundation pit space.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. A support system embodiment; as shown in fig. 1, 2 and 6: a large-span underground space deep foundation pit supporting system comprises a deep foundation pit 1; the method is characterized in that: a plurality of supporting units are continuously arranged on the inner wall of the periphery in the deep foundation pit 1, and an I-shaped steel sheet pile 4 is arranged between every two adjacent supporting units; the supporting unit comprises prefabricated supporting members 3 which are mutually butted and assembled up and down, left and right, and the prefabricated supporting members 3 at the left end and the right end are fixedly connected to an I-shaped steel sheet pile 4 through bolts 5; and forming an integral supporting wall on the inner wall around the deep foundation pit 1.
Waterproof plain concrete 2 is poured into a gap 11 between the supporting unit and the foundation of the inner wall of the excavated deep foundation pit; the prefabricated supporting member adopts a Chinese utility model patent product with the patent number of ZL201521112761.2 and the name of the prefabricated supporting member for underground space construction and assembly; the prefabricated supporting component is arched; the bottom of the I-shaped steel sheet pile 4 is fixed in the stratum.
The number of the prefabricated supporting members 3 in the horizontal direction of each supporting unit is five in the embodiment; the number of the prefabricated supporting members 3 in the horizontal direction of each supporting unit is four to six according to the soil condition of the deep foundation pit.
Referring to fig. 4 and 5, bolt holes 7 are arranged on the i-shaped steel sheet pile 4 at intervals of 50 cm; referring to fig. 3 and 8, the connecting arch ribs of the prefabricated supporting members 3 constituting the left and right ends of the supporting unit are provided with member bolt holes 9; and the bolts 5 penetrate through the bolt holes 7 and the component bolt holes 9 and are fastened by nuts 6 to fixedly connect the prefabricated supporting component 3 with the I-shaped steel sheet pile 4.
See fig. 3; four corners of the deep foundation pit 1 are provided with I-shaped steel sheet piles 4, and bolt holes 7 are also arranged on I-shaped flanges of the I-shaped steel sheet piles 4 positioned at the four corners of the deep foundation pit for fixing the arched prefabricated supporting members 3 with the changed directions at the corners. The prefabricated supporting members 3 are in a standard specification of 1000mm by 500mm by 80mm in length, width and thickness, and the distance between the adjacent I-shaped steel plate piles 4 is arranged according to 5m, so that an integrally closed deep foundation pit supporting system is finally formed.
As a perfect of the present invention, a row of stiffening rib plate members 8 is arranged between two i-shaped steel sheet piles 4 every 2m in the height direction, and the structure of the stiffening rib plate members 8 is shown in fig. 7: the upper end of the arc arch-shaped supporting and protecting plate is provided with a stiffening rib plate 801 which plays the roles of transversely separating stiffening beams and increasing rigidity; the stiffening rib plate component 8, the prefabricated supporting component 3 and the I-shaped steel sheet pile 4 form a square grid type integral wall surface supporting system with a cross beam type, and the integral wall surface supporting system has double functions of resisting soil pressure and stopping water.
An embodiment of a construction method; the excavation depth of a deep foundation pit in a certain V-level surrounding rock area needs 8m, the length of the foundation pit is 30m, the width of the foundation pit is 15m, the soil and underground water are leaked moderately, the construction vibration is moderate, the cohesive force reduction coefficient Kc =0.5, and the soil piling height H around the foundation pit0=1m, soil weight 17.5KN/m3Cohesive force of 105KPa, coefficient of variation of cohesive force of 0.5, and internal friction angle of wall rock of Ø =200(ii) a And designing a foundation pit excavation implementation scheme according to the conditions.
Step 1, as shown in fig. 9: paying off according to the length of a foundation pit of 30m and the width of 15m, determining the positions of four corners of the foundation pit, vertically driving I-shaped steel sheet piles 4 with the length of 11m into the foundation pit along four corners of an un-excavated soil body of the deep foundation pit, and driving 5I-shaped steel sheet piles with the same specification into two sides of the peripheral length direction of the un-excavated soil body of the deep foundation pit and 2I-shaped steel sheet piles with the same specification into two sides of the width direction.
Step 2, according to the development calculation software related to the invention, the calculation parameter result is as follows:
2.1, calculation results
2.1.1 assume one excavation length L =15m, excavation depth H1=8 m: the safety factor = 1.12; total lateral horizontal force F =3604.74KN, maximum excavation self-stabilizing height Hz=5.86 m; maximum unsupported length L of foundation pitmax=15m (calculation indicates that the surrounding rock is stable, and if the length of one excavation is 15m and the depth is 8m, the surrounding rock can be instantly stabilized for 1 day, and the requirement is that3 hours to complete effective bracing).
2.1.2 assume one excavation length L =30m, excavation depth H1=3 m: the safety factor = 1.81; total lateral horizontal force F =1351.78KN, maximum excavation self-stabilizing height Hz=5.86 m; maximum unsupported length L of foundation pitmaxAnd =30m (calculation suggests that the surrounding rock is stable for a short period of several weeks, requiring 1 week to complete effective support).
2.2, calculating the safety coefficients corresponding to the excavation depth and the excavation length and the required supporting completion time as shown in the table 2;
and 3, performing comparative analysis on the time of completing support according to the calculated safety factor, the safety depth and the safety length of the corresponding deep foundation pit needing to be excavated and the requirement, considering comprehensive factors such as construction safety, construction time and the like, and performing excavation according to the assumed two-to-three times more reliably and according with the engineering practice. Upper two layers H1、H2The excavation depth of each layer is 3m, and the excavation depth of the 3 rd layer is H3And the depth of the excavation is 8m when the depth is not less than 2 m.
As shown in FIG. 10, the first layer of soil in the deep foundation pit is excavated, and the safe excavation depth H is constructed1=3m, safe length 30 m; the excavation sequence is that the middle part is excavated firstly and then the periphery is excavated; and (3) requiring a week to finish excavation and corresponding support of the first layer of soil body, forming a first layer of foundation pit space 12 of the deep foundation pit after excavation of the first layer of soil body, and timely entering the step (4) to carry out splicing installation work of the arch member support system in the first layer of foundation pit space 12.
And 5, as shown in fig. 12, pouring and tamping the waterproof plain concrete 2 with a certain thickness into the gap 11 in time, and immediately stressing to form a protective wall together to play double roles of supporting and stopping the deep foundation pit.
After the supporting and the construction are finished, the steel plate can be used as a permanent protection of a foundation pit and can be used as a space of a basement, an underground parking lot and the like of a building; the prefabricated arch segment can be dismantled layer by layer and reused, and the energy-saving effect is achieved.
Claims (8)
1. A large-span underground space deep foundation pit supporting system comprises a deep foundation pit; the method is characterized in that: a plurality of supporting units are continuously arranged on the inner wall of the periphery in the deep foundation pit (1), and an I-shaped steel sheet pile (4) is arranged between every two adjacent supporting units; the supporting unit comprises prefabricated supporting members (3) which are mutually butted and assembled up and down, left and right, and the prefabricated supporting members (3) at the left end and the right end are fixedly connected to the I-shaped steel sheet pile (4) through bolts (5); and an integral supporting wall is formed on the inner wall around the deep foundation pit (1).
2. The large-span underground space deep foundation pit supporting system according to claim 1, wherein: waterproof plain concrete (2) is poured into a gap (11) between the supporting unit and the foundation of the inner wall of the excavated deep foundation pit; the prefabricated supporting member adopts a Chinese utility model patent product with the patent number of ZL201521112761.2 and the name of the prefabricated supporting member for underground space construction and assembly; the prefabricated supporting component is arched; the bottom of the I-shaped steel sheet pile (4) is fixed in the stratum.
3. The large-span underground space deep foundation pit supporting system according to claim 2, wherein: bolt holes (7) are arranged on the I-shaped steel sheet pile (4) at intervals of 50 cm; the connecting arch rib of the prefabricated supporting component (3) which forms the left end and the right end of the supporting unit is provided with a component bolt hole (9); and the bolts (5) penetrate through the bolt holes (7) and the component bolt holes (9) and are fastened by nuts (6) to fixedly connect the prefabricated supporting component (3) with the I-shaped steel sheet pile (4).
4. The large-span underground space deep foundation pit supporting system according to claim 3, wherein: i-shaped steel sheet piles (4) are arranged at four corners of the deep foundation pit (1), and bolt holes (7) are formed in I-shaped flanges of the I-shaped steel sheet piles (4) located at the four corners of the deep foundation pit.
5. The deep foundation pit supporting system for the large-span underground space as claimed in any one of claims 1 to 4, wherein: a row of stiffening rib plate members (8) are arranged between the two I-shaped steel sheet piles (4) and every 2m along the height direction, and the stiffening rib plate members (8) are structurally characterized in that stiffening rib plates (801) are arranged at the upper ends of the arc arch-shaped supporting and protecting plates.
6. The large-span underground space deep foundation pit supporting system according to claim 5, wherein: the number of the prefabricated supporting components (3) in the horizontal direction of each supporting unit is four to six, and the distance between every two adjacent I-shaped steel sheet piles (4) is four to six meters.
7. The large-span underground space deep foundation pit supporting system according to claim 6, wherein: the prefabricated supporting members (3) are of a size of 1000mm by 500mm by 80mm in length by width.
8. A construction method of a deep foundation pit supporting system of a large-span underground space comprises the following steps:
step 1, enabling the I-shaped steel sheet piles to enter the designed elevation of the bottom of a foundation pit for a depth of at least more than 2m, arranging one I-shaped steel sheet pile at each of four corners, and arranging the rest edges at intervals of 4m, 5m or 6 m;
step 2, according to relevant development calculation software of the construction method, according to relevant parameters of engineering geology, calculating the depth and length of each safe excavation of the deep foundation pit and the supporting safety coefficient corresponding to the time required by the construction excavation;
step 3, the excavation mode of the deep foundation pit is layered and integrally excavated, the safe depth and the safe length of the corresponding deep foundation pit needing to be excavated and the time range of the supporting needing to be completed are obtained according to the calculated supporting safety coefficient, and the excavation of the first layer of soil body in the deep foundation pit is carried out; the excavation sequence is that the middle part is first and then the periphery is second;
step 4, digging a first layer of foundation pit space in the deep foundation pit, and assembling the prefabricated supporting components and integrally installing the supporting system in time; assembling and combining the prefabricated support components in the horizontal direction, after assembling the first row of prefabricated support components in the horizontal direction, which form a support unit, fixing the prefabricated support components at the left end and the right end on the I-shaped steel sheet pile through fixing bolts, assembling the prefabricated support components from bottom to top row by row, and fixing the prefabricated support components row by row until assembling of the excavated soil layer is completed; when the primary support height exceeds 2m, arranging a row of stiffening rib plate members;
step 5, after the deep foundation pit supporting system with the supporting height is assembled at one time, waterproof plain concrete with a certain thickness is poured and tamped in time at the back of the continuously assembled arched prefabricated supporting component forming the supporting unit, and the waterproof plain concrete can be stressed immediately to form a protective wall together, so that the double functions of supporting and sealing the deep foundation pit are achieved;
step 6, repeating the steps 3 to 5, performing soil excavation and supporting work of the next layer of foundation pit, and completing all soil excavation and corresponding supporting within the corresponding safe depth, safe length and required time range; and (4) supporting the excavated soil layer in time when one layer of soil body is excavated, and circulating the steps until the excavated soil layer is excavated and supported to the depth and width range required by the designed bottom elevation of the foundation pit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894009A (en) * | 2020-08-04 | 2020-11-06 | 泛华建设集团有限公司 | Reverse construction method spliced steel sheet pile supporting structure and construction method |
| CN113047304A (en) * | 2021-03-30 | 2021-06-29 | 浙江泛华工程咨询有限公司 | Deep foundation pit support system for municipal engineering and construction method |
| CN114250789A (en) * | 2021-12-27 | 2022-03-29 | 中建八局南方建设有限公司 | Sheet pile supporting structure of foundation pit in deep foundation pit and construction method thereof |
| CN120556493A (en) * | 2025-08-01 | 2025-08-29 | 赣州市榕盛新型建材有限公司 | A reinforced concrete prefabricated part for repairing the edge of a foundation pit |
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| JP2000204876A (en) * | 1999-01-14 | 2000-07-25 | Shimizu Corp | Shaft structure |
| CN101914925A (en) * | 2008-11-19 | 2010-12-15 | 兰州南特数码科技股份有限公司 | Basement by using optimized composite prefabricated arch wall as external wall |
| CN105239584A (en) * | 2015-09-30 | 2016-01-13 | 常州大学怀德学院 | Multi-arch sheet pile supporting structure and construction process |
| CN205260054U (en) * | 2015-12-29 | 2016-05-25 | 中国市政工程西北设计研究院有限公司 | Underground space construction is assembled with prefabricated support unit |
| CN106978814A (en) * | 2017-05-09 | 2017-07-25 | 天津大学 | A kind of Fabricated Structure for Support of Excavation |
| CN107740426A (en) * | 2017-10-13 | 2018-02-27 | 南京工业大学 | Assembled multi-arch wall foundation pit supporting structure and construction process |
| CN212175797U (en) * | 2019-11-22 | 2020-12-18 | 中国市政工程西北设计研究院有限公司 | Large-span underground space deep foundation pit supporting system |
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| CN111894009A (en) * | 2020-08-04 | 2020-11-06 | 泛华建设集团有限公司 | Reverse construction method spliced steel sheet pile supporting structure and construction method |
| CN113047304A (en) * | 2021-03-30 | 2021-06-29 | 浙江泛华工程咨询有限公司 | Deep foundation pit support system for municipal engineering and construction method |
| CN114250789A (en) * | 2021-12-27 | 2022-03-29 | 中建八局南方建设有限公司 | Sheet pile supporting structure of foundation pit in deep foundation pit and construction method thereof |
| CN120556493A (en) * | 2025-08-01 | 2025-08-29 | 赣州市榕盛新型建材有限公司 | A reinforced concrete prefabricated part for repairing the edge of a foundation pit |
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Inventor after: Tong Jingsheng Inventor after: Chen Shuangqing Inventor after: Li Juhong Inventor after: Zhang Weiqiang Inventor after: Zhao Guorui Inventor before: Tong Jingsheng Inventor before: Chen Shuangqing Inventor before: Li Juhong Inventor before: Zhang Weiqiang Inventor before: Zhao Guorui |