CN114658034B - Wedge-shaped supporting and retaining body for reinforcing arch feet of soft foundation open cut and buried tunnel and construction method - Google Patents
Wedge-shaped supporting and retaining body for reinforcing arch feet of soft foundation open cut and buried tunnel and construction method Download PDFInfo
- Publication number
- CN114658034B CN114658034B CN202210094317.0A CN202210094317A CN114658034B CN 114658034 B CN114658034 B CN 114658034B CN 202210094317 A CN202210094317 A CN 202210094317A CN 114658034 B CN114658034 B CN 114658034B
- Authority
- CN
- China
- Prior art keywords
- tunnel
- module
- cast
- prefabricated
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a wedge-shaped supporting and blocking body for reinforcing arch legs of a soft foundation open cut buried tunnel and a construction method, wherein a supporting and blocking structure is arranged at the arch leg position along the extending direction of the tunnel, the supporting and blocking body is divided into two parts, one part is connected with the arch legs of the tunnel and takes a right trapezoid shape, and a cast-in-situ mode is adopted; the other part adopts a wedge-shaped prefabricated structure, one side of the prefabricated structure is contacted with the excavation slope, the other side of the prefabricated structure is contacted with the supporting and retaining reflecting pouring part through the bulge of the structural body, the contact surface is subjected to smooth treatment, and the two parts of the structures can relatively move under the action of an overlying load. According to the support and baffle body, the support and baffle force provided by the support and baffle body to the arch foot of the tunnel can be effectively increased by changing the transmission path of backfill load, and the tunnel deformation caused by the backfill load of the open cut and buried tunnel on the soft foundation is reduced.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering, and particularly relates to a wedge-shaped supporting and retaining body for reinforcing arch feet of a soft foundation open cut and buried tunnel and a construction method.
Background
Along with the continuous development of the infrastructure construction of China, the tunnel engineering construction range is wider and wider, the environment encountered in the tunnel engineering construction process is more complex, and the soft foundation becomes a common problem of tunnel engineering construction. Tunnel construction on soft foundations often faces structural failure problems caused by large sedimentation and uneven sedimentation.
For the open cut buried tunnel built on the soft foundation, the conventional backfill structure is adopted at the arch foot part in the existing design, namely a right-angle trapezoid concrete structure or a right-angle trapezoid concrete structure, or the reinforcement is carried out through an anchor rod. The anchor rod has an unobvious effect in a soft foundation, and is used by matching with grouting, so that the engineering cost is high; the conventional arch foot backfill structure has the tendency of deviating from arch foot displacement under the effect of backfill load, has weaker contact force with the arch foot and has unobvious supporting and reinforcing effects.
Disclosure of Invention
Aiming at the defects of the conventional reinforcement structure of the arch foot of the open cut and hidden tunnel on the soft foundation, the invention provides the wedge-shaped support body for reinforcing the arch foot of the open cut and hidden tunnel on the soft foundation, which has a simple structure and is convenient to implement, and the construction method can ensure that the settlement and stress of the open cut and hidden tunnel on the soft foundation under backfill load can meet the relation.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the wedge-shaped supporting and retaining body for reinforcing the arch feet of the soft foundation open cut buried tunnel comprises a cast-in-situ module and a prefabricated module, wherein the section of the cast-in-situ module is in a right trapezoid shape, and the section of the prefabricated module is in a wedge shape;
the cast-in-situ module and the prefabricated module are arranged at arch feet on two sides of the tunnel structure along the extending direction of the tunnel, the cast-in-situ module is connected with the arch feet of the tunnel, one side of the prefabricated module is contacted with the cast-in-situ module, and the other side of the prefabricated module is contacted with the slope surface of the excavated side.
Further, the cast-in-situ module performs sectional casting after the tunnel structure is cast, and the sectional length is the same as the sectional length of the tunnel structure.
Further, the prefabricated modules comprise a plurality of prefabricated modules, and the prefabricated modules are sequentially connected.
Further, each prefabricated module is provided with an arc-shaped bulge close to the side face of the tunnel, the prefabricated modules are in contact with the cast-in-situ module through the arc-shaped bulge, and the prefabricated modules and the cast-in-situ module can move relatively.
Further, adjacent prefabricated modules are connected through hooks, the length of each prefabricated module is about 1 meter, and the prefabricated modules are made of concrete.
Further, the prefabricated module material adopts light concrete.
Further, the height of the cast-in-situ module is the same as that of the prefabricated module.
Further, an included angle alpha between the side surface of the prefabricated module close to the cast-in-situ module and the horizontal plane is complementary with an included angle beta between the adjacent cast-in-situ module and the horizontal plane; the included angle gamma between the side surface of the prefabricated module, which is close to the excavation slope, and the horizontal plane is complementary with the toe angle theta of the excavation slope.
Further, θ is a maximum of 60 °.
The construction method of the wedge-shaped supporting and blocking body for reinforcing the arch springing of the soft foundation open cut and buried tunnel comprises the following steps:
A. calculating the stability of the excavation slope by adopting a limit balance method or a finite element strength folding and subtracting method according to the geological survey data, and determining the slope of the excavation slope;
B. analyzing the influence of different support body design parameters including support body height, angles of two side surfaces and the like on the stress and settlement of tunnel arch feet by adopting a finite element method through a control variable method, determining the support body parameters, and processing a prefabricated module in a prefabricated field;
C. excavating a foundation pit and pouring a tunnel structure;
D. after the construction of the tunnel structure is completed, casting a supporting and retaining reflecting pouring module along the tunnel arch foot section, and after the concrete of the cast-in-situ module reaches the design strength, smoothing the surface, far away from the tunnel structure, of the cast-in-situ module, which is contacted with the spliced prefabricated module;
E. and assembling the prefabricated modules, mounting the prefabricated modules on one side of the cast-in-situ module in sections, and then backfilling the inverted arch of the tunnel and backfilling the upper soil.
The beneficial effects of the invention are as follows: the wedge-shaped supporting and retaining body for reinforcing the arch feet of the soft foundation open cut and buried tunnel is simple in structure, convenient to construct, capable of effectively reinforcing the arch feet of the tunnel and reducing uneven settlement of the arch feet caused by backfill load due to the fact that relative displacement occurs between the prefabricated modules and the cast-in-situ modules, which are independent of each other, of the supporting and retaining body structure, the transmission path and the direction of the force of the overlying load are changed, the active soil pressure of a side slope is converted into the passive soil pressure, and meanwhile, the partial force of the vertically acting overlying load is converted into the horizontal force through the prefabricated modules, so that the horizontal supporting and retaining force of the arch feet is increased, the force of the arch feet is mutually acted, and the restraining force of the supporting and retaining body is also increased.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and explain the invention and do not constitute a undue limitation on the invention. The drawings are as follows:
FIG. 1 is a schematic view of a wedge-shaped support for reinforcing arch springing of a soft foundation open cut buried tunnel;
FIG. 2 is a structural dimension of the present invention;
FIG. 3 is a structural mounting view of the present invention;
FIG. 4 is a top view of the overall structure;
FIG. 5 is a perspective view of a prefabricated module;
FIG. 6 is a flow chart of the construction method of the present invention;
FIG. 7 is a schematic diagram of structural calculation of an embodiment and a conventional scheme;
FIG. 8 is a graph showing the comparison of the calculation results of the embodiment and the conventional scheme;
in the figure: 1. soft foundation, 2, cushion layer, 3, tunnel structure, 4, inverted arch backfill, 5, cast-in-situ module, 6, prefabricated module, 7, excavation side slope, 8, backfill soil, 601, prefabricated module main body structure, 602, connecting steel bars, 603 and protrusion.
Detailed Description
The present invention will be further described with reference to the drawings and examples, but the scope of the present invention is not limited to the examples.
As shown in fig. 1 to 6, a wedge-shaped supporting block for reinforcing arch feet of a soft foundation open cut and buried tunnel comprises a soft foundation 1, a cushion layer 2, a tunnel structure 3, an inverted arch backfill 4, a cast-in-place module 5, a prefabricated module 6, an excavation slope 7 and backfill 8;
specifically, the support mainly comprises a cast-in-situ module 5 and a prefabricated module 6, wherein the section of the cast-in-situ module 5 is in a right trapezoid shape, the section of the prefabricated module 6 is in a wedge shape (combined with fig. 2, the structure is wide in upper part and narrow in lower part, and is wedged between the cast-in-situ module 5 and the excavation slope 7).
Specifically, the cast-in-situ module 5 and the prefabricated module 6 are arranged at the arch foot of the tunnel along the extending direction of the tunnel, the cast-in-situ module 5 is connected with the arch foot of the tunnel structure 3, one side of the prefabricated module 6 is contacted with the cast-in-situ module 5, and the other side is contacted with the slope surface of the excavation side slope 7.
Specifically, the cast-in-situ module 5 is cast in sections after the tunnel structure 3 is cast, and the section length is the same as the section length of the main tunnel.
Specifically, an arc-shaped protrusion 603 is arranged on the side surface of the prefabricated module 6 close to the tunnel, the prefabricated module 6 is in contact with the cast-in-situ module 5 through the protrusion 603, the contact area between the two modules can be reduced due to the protrusion 603, friction force is reduced, and the two modules can move relatively; the prefabricated modules 5 are connected through hooks 602, and the length of each prefabricated module 5 is controlled to be about 1 meter so as to meet the requirement of the curvature radius of the tunnel.
Specifically, the height of the cast-in-situ module 5 and the included angle between the contact surface of the cast-in-situ module 5 and the prefabricated module 6 and the horizontal plane are determined through the optimization of stress and sedimentation of the tunnel structure under the comparison of different design parameters.
Specifically, the included angle alpha between the side surface of the prefabricated module 6 close to the cast-in-situ module 5 and the horizontal plane is complementary with the included angle beta between the adjacent cast-in-situ module 5 and the horizontal plane; the included angle gamma between the side surface of the prefabricated module 6, which is close to the excavation slope 7, and the horizontal plane is complementary with the slope toe angle theta of the excavation slope 7; the maximum gradient of the excavated side slope 7 is determined by calculating the side slope stability.
The construction method of the embodiment is shown in fig. 6, firstly, engineering data including data of tunnel structure design, geological survey and the like are collected, excavation slope stability calculation is carried out according to the geological survey data, the maximum value of slope inclination angle theta is determined to be 60 degrees, structural stress and deformation conditions under different support body design parameters are analyzed through numerical calculation, design parameters are optimized according to calculation results, final design parameters are determined, the section of the cast-in-situ module of the embodiment is a right-angle trapezoid, and the trapezoid height h=3.0 m, L1=0.0 m, L2=3.5 m, angle alpha=35 degrees and angle theta=45 degrees are determined through calculation and analysis (the effect of the scheme is optimal in combination with table 1);
after the design parameters of the supporting and retaining body are determined, the prefabricated modules are produced in the prefabricated field while the side slope is excavated on site, the prefabricated modules are made of concrete, common conventional concrete can be adopted when the geological condition is good and the bearing capacity is high, and light concrete can be adopted when the geological condition is poor and the bearing capacity is low;
pouring a tunnel structure after the side slope is excavated, then applying a cast-in-situ module, and carrying out surface smoothing treatment on the side surface of the cast-in-situ module, which is far away from the tunnel, after the strength of the cast-in-situ module meets the requirement;
the prefabricated modules are transported to a construction site, prefabricated module assembly is carried out through hooks arranged in the prefabricated modules, gaps between the prefabricated modules and the cast-in-situ modules can be properly filled with granular materials such as fine sand, and free movement between the cast-in-situ modules and the prefabricated modules is ensured;
and finally, earthing the tunnel and backfilling the inverted arch in the tunnel.
In order to illustrate the beneficial effects of the present embodiment, finite element calculation is performed on the structure under the condition of the present embodiment, and the calculation result is compared with the calculation result of the conventional arch support, fig. 7 is a schematic calculation diagram of the present embodiment and a schematic calculation diagram of the conventional arch support, where the rest parts are identical except for the support forms.
Fig. 8 is a comparison chart of calculation results of two schemes, wherein a curve in the figure shows a change chart of compressive stress change of a supporting body along the height direction, and comparison of calculation results of the two schemes shows that the supporting force provided by the upper part of the supporting body to the arch leg of a tunnel under the conventional scheme is limited and has smaller value, and the supporting force of the supporting body to the arch leg under the scheme of the embodiment is obviously improved, and the stress range and the supporting force are obviously increased.
The supporting and blocking effect of the supporting and blocking body on the arch springing is studied below.
As shown in table 1, the parameters θ, L1, L2 and h of the support are kept unchanged, the support force provided by the support to the tunnel arch by changing the angle α of the cast-in-situ module is also changed, so that it is explained that changing one or more values of the parameters of the support can affect the support effect.
TABLE 1
From the above, the form of the device can be flexibly changed according to the adjustment of the parameters so as to adapt to different tunnel structures and geological conditions.
The above description is only illustrative of the preferred embodiments of the invention and is not intended to limit the scope of the invention in any way. Any alterations or modifications of the invention, which are obvious to those skilled in the art based on the teachings disclosed above, are intended to be equally effective embodiments, and are intended to be within the scope of the appended claims.
Claims (9)
1. The wedge-shaped supporting and retaining body for reinforcing the arch feet of the soft foundation open cut and buried tunnel is characterized by comprising a cast-in-situ module (5) and a prefabricated module (6), wherein the section of the cast-in-situ module (5) is in a right trapezoid shape, and the section of the prefabricated module (6) is in a wedge shape;
the cast-in-situ module (5) and the prefabricated module (6) are arranged at arch feet on two sides of the tunnel structure (3) along the extending direction of the tunnel, the cast-in-situ module (5) is connected with the arch feet of the tunnel, one side of the prefabricated module (6) is contacted with the cast-in-situ module (5), and the other side is contacted with the slope surface of the excavation slope (7);
each prefabricated module (6) is close to the side face of the tunnel and is provided with an arc-shaped bulge (603), the prefabricated modules (6) are in contact with the cast-in-situ module (5) through the arc-shaped bulge (603), and the prefabricated modules (6) and the cast-in-situ module (5) can move relatively.
2. The wedge-shaped support for reinforcing arch feet of soft foundation open cut and buried tunnel according to claim 1, wherein the cast-in-place module (5) is used for casting in sections after the casting of the tunnel structure (3) is finished, and the section length is the same as the section length of the tunnel structure (3).
3. Wedge-shaped support for reinforcement of soft foundation open cut and buried tunnel arch springing according to claim 1, characterized in that the prefabricated modules (6) comprise a plurality of prefabricated modules (6) connected in sequence.
4. The wedge-shaped support for reinforcing arch feet of soft foundation open cut and buried tunnel according to claim 1, characterized in that adjacent prefabricated modules (6) are connected by hooks (602), the length of each prefabricated module (6) is about 1 meter, and the prefabricated modules (6) are made of concrete.
5. Wedge-shaped support for reinforcement of soft foundation open cut and buried tunnel footing of claim 4 wherein the prefabricated module (6) material is lightweight concrete.
6. Wedge-shaped support for reinforcement of soft foundation open cut and buried tunnel arch footing according to any of claims 1-5, characterized in that the cast-in-place modules (5) are at the same height as the prefabricated modules (6).
7. Wedge-shaped support for reinforcement of arch feet of soft foundation open cut and buried tunnels according to any of claims 1-5, characterized in that the angle α of the side of the prefabricated module (6) close to the cast-in-situ module (5) with the horizontal plane is complementary to the angle β of the adjacent cast-in-situ module (5) with the horizontal plane; the included angle gamma between the side surface of the prefabricated module (6) close to the excavation slope (7) and the horizontal plane is complementary with the toe angle theta of the excavation slope (7).
8. The wedge-shaped support for reinforcing soft foundation open cut and buried tunnel footing of claim 7 wherein θmax is 60 °.
9. The construction method of the wedge-shaped supporting block for reinforcing the arch springing of the soft foundation open cut and buried tunnel according to any one of claims 1 to 8, characterized by comprising the following steps:
A. calculating the stability of the excavation slope (7) by adopting a limit balance method or a finite element strength folding and subtracting method according to the geological survey data, and determining the gradient of the excavation slope (7);
B. analyzing the influence of different support body design parameters including support body height and angles of two side surfaces on the stress and settlement of tunnel arch feet by adopting a finite element method through a control variable method, determining support body parameters, and processing a prefabricating module (6) in a prefabricating field;
C. excavating a foundation pit and pouring a tunnel structure (3);
D. after the construction of the tunnel structure (3) is completed, casting a supporting and retaining embodiment casting module (5) along the tunnel arch foot section, and after the concrete of the cast-in-situ module (5) reaches the design strength, carrying out smooth treatment on the surface, far away from the tunnel structure (3), of the cast-in-situ module (5) and contacted with the spliced prefabricated module (6);
E. and assembling the prefabricated modules (6), mounting the prefabricated modules on one side of the cast-in-situ module (5) in a segmented manner, and backfilling the inverted arch of the tunnel and backfilling the upper soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094317.0A CN114658034B (en) | 2022-01-26 | 2022-01-26 | Wedge-shaped supporting and retaining body for reinforcing arch feet of soft foundation open cut and buried tunnel and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094317.0A CN114658034B (en) | 2022-01-26 | 2022-01-26 | Wedge-shaped supporting and retaining body for reinforcing arch feet of soft foundation open cut and buried tunnel and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114658034A CN114658034A (en) | 2022-06-24 |
| CN114658034B true CN114658034B (en) | 2023-07-21 |
Family
ID=82026245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210094317.0A Active CN114658034B (en) | 2022-01-26 | 2022-01-26 | Wedge-shaped supporting and retaining body for reinforcing arch feet of soft foundation open cut and buried tunnel and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114658034B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115559156B (en) * | 2022-12-06 | 2023-03-21 | 中国铁路设计集团有限公司 | Wedge-shaped supporting structure of assembly type track and mounting method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719492B1 (en) * | 2002-03-22 | 2004-04-13 | Bebotech Corporation | Top arch overfilled system |
| CN105804765A (en) * | 2016-01-05 | 2016-07-27 | 中国科学院武汉岩土力学研究所 | Permeable-rib type double-arch tunnel |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1340179C (en) * | 1988-11-23 | 1998-12-15 | John B. Kennedy | Soil-metal arch bridge on reinforced earth abutments |
| JP4449876B2 (en) * | 2005-09-28 | 2010-04-14 | 羽田コンクリート工業株式会社 | Large-section tunnel structure and its construction method |
| CN103206219A (en) * | 2013-05-06 | 2013-07-17 | 浙江省宏途交通建设有限公司 | Holed excavation supporting structure for light and dark junction section of tunnel in bias pressure state and construction method |
| CA2818730C (en) * | 2013-06-10 | 2020-12-15 | Terratech Consulting Ltd. | Reinforced arch with floating footer and method of constructing same |
| CN104278993B (en) * | 2013-07-11 | 2016-06-08 | 福州市规划设计研究院 | A kind of bias voltage Skew Tunnel enters the constructional method in hole |
| US20180030684A1 (en) * | 2015-02-13 | 2018-02-01 | Bebo Arch International Ag | Arched cut-and-cover structure and method of its construction |
| CN110318770A (en) * | 2019-06-26 | 2019-10-11 | 中铁二十三局集团第三工程有限公司 | A kind of hazy start tunneling method of vcehicular tunnel |
| KR102208236B1 (en) * | 2020-07-31 | 2021-01-27 | (주)하경엔지니어링 | Semi Open Cut Type Supporting System of Tunnel and the Construction Method of Tunnel Using by Same |
| CN112983437B (en) * | 2021-03-26 | 2022-05-10 | 中铁第六勘察设计院集团有限公司 | Vertical conversion construction method for light and shade excavation method of small-clear-distance U-shaped access channel |
| CN112983492B (en) * | 2021-04-21 | 2023-05-16 | 中国一冶集团有限公司 | Vertical fixing structure of tunnel primary support steel arch frame and construction method thereof |
-
2022
- 2022-01-26 CN CN202210094317.0A patent/CN114658034B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719492B1 (en) * | 2002-03-22 | 2004-04-13 | Bebotech Corporation | Top arch overfilled system |
| CN105804765A (en) * | 2016-01-05 | 2016-07-27 | 中国科学院武汉岩土力学研究所 | Permeable-rib type double-arch tunnel |
Non-Patent Citations (1)
| Title |
|---|
| 一种新型框架组合支挡结构的设计研究;徐艳;刘京安;梁义聪;聂影;;地下空间与工程学报(第04期);1021-1026 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114658034A (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Deformation characteristics of a 38 m deep excavation in soft clay | |
| CN106968257B (en) | Concrete-fabricated profile steel mixed supporting system for ultra-large deep foundation pit and construction method thereof | |
| CN114658034B (en) | Wedge-shaped supporting and retaining body for reinforcing arch feet of soft foundation open cut and buried tunnel and construction method | |
| Deshpande et al. | Analysis of railway embankment supported with geosynthetic-encased stone columns in soft clays: a case study | |
| Feng et al. | Field monitoring of geogrid-reinforced and pile-supported embankment at bridge approach | |
| CN101831915B (en) | Reinforced structure for foundation with wide defect and construction method thereof | |
| Yi et al. | Overturning progressive collapse mechanism and control methods of excavations retained by cantilever piles | |
| Liu et al. | Measured behaviors of an oversized irregular basement excavation and its surrounding responses in thick soft clay | |
| RU2382846C1 (en) | Retaining wall on rocky ground | |
| Broere et al. | Phased simulation of a tunnel boring process in soft soil | |
| CN109056804B (en) | Comprehensive pipe rack foundation pit supporting structure and implementation method thereof | |
| CN115809496A (en) | Pile plate roadbed design method and device adjacent to existing railway bridge well digging foundation | |
| JPH02504050A (en) | Method for forming road and roadbed structures | |
| JP2020197015A (en) | Construction method of foundation | |
| Ni et al. | PVD and DCM columns combined ground improvement for embankment construction | |
| RU2256033C2 (en) | Foundation structure for building and building structure | |
| CN113502847A (en) | Assembly type rigid support protection foundation structure for buried pipeline | |
| JP7232482B1 (en) | Horizontal pulling laying device and laying method for precast blocks | |
| CN219060078U (en) | Municipal pipeline backfill structure | |
| Elsawy | Conventional and geogrid-encased stone piles improved soft ground under an embankment | |
| CN212742621U (en) | Unloading type pile plate retaining wall | |
| CN217810582U (en) | Box culvert subbottom construction structure | |
| CN210737585U (en) | Retaining structure | |
| CN109944253B (en) | Reinforced concrete blade wall supporting system and deep foundation pit support changing construction method thereof | |
| Jovanović et al. | Excavation support system with piles—Case study |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |