CN218479173U - Foundation pit supporting system capable of automatically adjusting prestress - Google Patents
Foundation pit supporting system capable of automatically adjusting prestress Download PDFInfo
- Publication number
- CN218479173U CN218479173U CN202220969715.8U CN202220969715U CN218479173U CN 218479173 U CN218479173 U CN 218479173U CN 202220969715 U CN202220969715 U CN 202220969715U CN 218479173 U CN218479173 U CN 218479173U
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- limiting plate
- prestress
- system capable
- hydraulic jack
- 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
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a can automatically regulated prestressing force's foundation ditch braced system aims at providing one kind when the displacement takes place for the foundation ditch, and the prestressing force at a shaped steel supporting beam is applyed to the regulation that can be timely to eliminate the deformation displacement of foundation ditch, keep the foundation ditch to be in the foundation ditch braced system that can automatically regulated prestressing force of steady state. The foundation pit enclosure wall comprises a foundation pit enclosure wall; enclosing a purlin beam; the steel section supporting beams are supported between the surrounding purlin beams; the self-adjusting prestress device provides prestress for the profile steel supporting beam so that the profile steel supporting beam is supported between the surrounding purlin beams, and comprises an electric hydraulic jack and a foundation pit deformation displacement monitor, wherein the foundation pit deformation displacement monitor is used for monitoring the foundation pit deformation displacement of the position of the profile steel supporting beam.
Description
Technical Field
The utility model relates to a foundation ditch supports the field, concretely relates to foundation ditch braced system that can automatically regulated prestressing force.
Background
The existing foundation pit support generally comprises a foundation pit enclosure wall, an enclosure purlin beam and a prestressed steel combined support. The purlin beam surrounds and is arranged on the inner side of the foundation pit enclosure wall. The prestress profile steel combined support comprises a profile steel support beam and a prestress pressurizing assembly, and the prestress pressurizing assembly comprises a hydraulic jack. The structural steel supporting beam is supported between the surrounding purlin beams through the prestress pressurizing assembly, and prestress is applied to the structural steel supporting beam through the hydraulic jack to support soil pressure outside the foundation pit. After the hydraulic jack of the prestress profile steel combined support in the conventional foundation pit support is pressurized, the hydraulic jack is taken down and turned to other support structures, so that prestress can be provided for a profile steel support beam to improve the foundation pit supporting capacity and improve the utilization rate of the hydraulic jack; however, the existing prestressed profile steel combined support cannot find that the foundation pit is displaced in time, and in the using process of the prestressed profile steel combined support, if the foundation pit is displaced (the soil pressure outside the foundation pit is increased, the foundation pit is displaced inwards, or the soil pressure outside the foundation pit is reduced, the foundation pit is displaced outwards), the prestress applied to the profile steel supporting beam cannot be adjusted in time, so that the deformation of the foundation pit is continuously increased, and the safety of facilities around the foundation pit is influenced; especially, when facilities and/or buildings with extremely high requirements on the deformation control of the foundation pit, such as subway tunnels, ancient buildings and the like, are arranged beside the foundation pit, the potential safety hazard is extremely large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a when the displacement takes place for the foundation ditch, prestressing force at a shaped steel supporting beam is applyed in regulation that can be timely to eliminate the deformation displacement of foundation ditch, keep the foundation ditch to be in the foundation ditch braced system that can automatically regulated prestressing force of steady state.
The technical scheme of the utility model is that:
a foundation pit support system capable of automatically adjusting pre-stress, comprising:
a foundation pit enclosure wall;
the enclosing purlin beam is arranged on the inner side of the foundation pit enclosing wall;
the steel support beams are supported between the surrounding purlin beams;
the self-adjusting prestress device provides prestress for the profile steel supporting beam so that the profile steel supporting beam is supported between the surrounding purlin beams, and comprises an electric hydraulic jack and a foundation pit deformation displacement monitor, wherein the foundation pit deformation displacement monitor is used for monitoring the foundation pit deformation displacement of the position of the profile steel supporting beam.
When the foundation pit deformation displacement monitor monitors that the deformation displacement of the inner wall of the foundation pit at the position of the section steel support beam to the inner side of the foundation pit exceeds a set value D1, the electric hydraulic jack increases the prestress on the section steel support beam, and the foundation pit is pushed outwards through the section steel support beam and the enclosing purlin beam so as to eliminate the deformation displacement of the inner wall of the foundation pit to the inner side of the foundation pit;
when the foundation pit deformation displacement monitor monitors that the deformation displacement of the inner wall of the foundation pit at the position of the section steel supporting beam to the outer side of the foundation pit exceeds a set value D2, the electric hydraulic jack reduces the prestress of the section steel supporting beam so as to eliminate the deformation displacement of the inner wall of the foundation pit to the outer side of the foundation pit. So, not only can in time discover that the foundation ditch takes place to warp the displacement, can in addition take place to warp the displacement at the foundation ditch just, apply the prestressing force at shaped steel supporting beam through timely regulation electro-hydraulic jack to eliminate the deformation displacement of foundation ditch, keep the foundation ditch to be in steady state, be particularly useful for by the foundation ditch have subway tunnel, ancient building etc. to apply in the foundation ditch deformation control requires high foundation ditch engineering.
Preferably, the foundation pit deformation displacement monitor comprises a laser distance meter, the laser distance meter is used for monitoring the foundation pit distance of the position of the profile steel supporting beam, and the foundation pit distance is the foundation pit distance in the length direction of the profile steel supporting beam. Therefore, the pit distance of the foundation pit at the position of the profile steel supporting beam can be monitored in real time through the laser range finder, once the laser range finder detects that the pit distance of the foundation pit changes, the foundation pit is subjected to deformation displacement, and specifically, when the pit distance of the foundation pit becomes smaller, the inner wall of the foundation pit is subjected to deformation displacement towards the inner side of the foundation pit; and if the pit distance of the foundation pit is increased, the deformation and displacement of the inner wall of the foundation pit towards the outer side of the foundation pit are indicated.
Preferably, the self-adjusting prestressing device further comprises two pressing members which can be mutually spread, and the electro-hydraulic jack is positioned between the two pressing members and is used for spreading the two pressing members.
Preferably, the self-adjusting prestressing device further comprises a guide box, the guide box comprises an upper limit plate and a left side limit plate and a right side limit plate which are parallel to each other, the upper limit plate is parallel to the telescopic direction of the electric hydraulic jack, the side limit plates are parallel to the telescopic direction of the electric hydraulic jack, an inner cavity defined by the guide box forms a pressurizing part guide cavity, the two pressurizing parts are located in the pressurizing part guide cavity, the upper limit plate and the two side limit plates are fixed on one of the pressurizing parts, and the other pressurizing part can move in the pressurizing part guide cavity along the telescopic direction of the electric hydraulic jack. So, can carry on spacingly to the moving direction who adds the pressure part through last limiting plate and two side limiting plates of left and right sides, at the prestressing force of electronic hydraulic jack application and adjust the prestressing force in-process, add the pressure part and can follow the confined direction and remove, guarantee that shaped steel supporting beam can not the lateral instability.
Preferably, the guide box further comprises a lower limiting plate, the lower limiting plate is located below the upper limiting plate, the lower limiting plate is parallel to the telescopic direction of the electro-hydraulic jack, the lower limiting plate is fixed on one of the pressurizing pieces, and the lower limiting plate and the upper limiting plate are fixed on the same pressurizing piece. Thus, the position of the pressing member in the moving direction can be further increased.
Preferably, a support member is further provided between the two pressure members.
Preferably, the pressurizing member comprises H-shaped steel and a plurality of reinforcing plates arranged between two flange plates of the H-shaped steel.
Preferably, the self-adjusting prestressing device further comprises a pressure detection sensor, the electric hydraulic jack comprises a hydraulic cylinder and an electric pump station, and the pressure detection sensor is used for detecting the pressure in one end of the two ends of the hydraulic cylinder, which is opposite to a piston rod of the hydraulic cylinder. Therefore, the pressure in the hydraulic cylinder can be detected through the pressure detection sensor, and the pre-pressure applied to the section steel supporting beam by the electric hydraulic jack is prevented from exceeding a set value.
Preferably, the oil inlet and the oil outlet at two ends of the hydraulic cylinder are both provided with electromagnetic switch valves. Therefore, after the prestress is applied to the electric hydraulic jack and the prestress is adjusted, the hydraulic cylinder can be locked to apply the prestress by closing the electromagnetic switch valve, and the prestress applied to the section steel supporting beam is prevented from changing due to leakage of an oil pipeline of the electric hydraulic jack.
The utility model has the advantages that: not only can in time discover that the foundation ditch takes place to warp the displacement, can take place to warp the displacement at the foundation ditch in addition just, apply the prestressing force at a shaped steel supporting beam through timely regulation electro-hydraulic jack to eliminate the deformation displacement of foundation ditch, keep the foundation ditch to be in steady state, be particularly useful for by the foundation ditch have subway tunnel, ancient building etc. to apply in the foundation ditch deformation control requires high foundation ditch engineering.
Drawings
Fig. 1 is a schematic structural diagram of a foundation pit supporting system capable of automatically adjusting prestress according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a self-adjusting prestressing device according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a foundation pit supporting system capable of automatically adjusting prestress according to the second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a foundation pit supporting system capable of automatically adjusting prestress according to a third embodiment of the present invention.
In the figure:
a foundation pit enclosure wall 1;
enclosing a purlin beam 2;
a section steel support beam 3;
the self-adjusting type hydraulic lifting device comprises a self-adjusting type prestress device 4, an electric hydraulic jack 4.1, a pressurizing piece 4.2, a guide box 4.3, a side limiting plate 4.31 and an upper limiting plate 4.32;
a triangular support 5;
the end support beams 6.
Detailed Description
The first embodiment is as follows: as shown in fig. 1 and 2, a foundation pit supporting system capable of automatically adjusting prestress comprises a foundation pit enclosure wall 1, an enclosure purlin beam 2, a section steel supporting beam 3 and a self-adjusting prestress device 4. Enclose the purlin roof beam setting inboard at the foundation ditch enclosure wall, in this embodiment, enclose the purlin roof beam and enclose the purlin for the steel. The section steel support beams are supported between the purlin enclosing beams. The self-adjusting prestress device provides prestress for the section steel support beam so that the section steel support beam is supported between the surrounding purlin beams. The self-adjusting prestress device comprises an electric hydraulic jack 4.1 and a foundation pit deformation displacement monitor, wherein the foundation pit deformation displacement monitor is used for monitoring the foundation pit deformation displacement of the position of the section steel supporting beam. The pit deformation displacement monitor is not shown in the figure. In this embodiment, the number of the electro-hydraulic jacks in the self-adjusting prestressing device is one or more.
When the foundation pit deformation displacement monitor monitors that the deformation displacement of the inner wall of the foundation pit at the position of the profile steel supporting beam to the inner side of the foundation pit exceeds a set value D1, the electric hydraulic jack increases the prestress of the profile steel supporting beam, and the foundation pit is pushed outwards through the profile steel supporting beam and the surrounding purlin beam so as to eliminate the deformation displacement of the inner wall of the foundation pit to the inner side of the foundation pit. In this embodiment, the set value D1 is 1 to 3 mm.
When the foundation pit deformation displacement monitor monitors that the deformation displacement of the inner wall of the foundation pit at the position of the profile steel supporting beam to the outer side of the foundation pit exceeds a set value D2, the electric hydraulic jack reduces the prestress of the profile steel supporting beam so as to eliminate the deformation displacement of the inner wall of the foundation pit to the outer side of the foundation pit. In this embodiment, the setting value D2 is 1 to 3 mm. So, not only can in time discover that the foundation ditch takes place to warp the displacement, can in addition take place to warp the displacement at the foundation ditch just, apply the prestressing force at shaped steel supporting beam through timely regulation electro-hydraulic jack to eliminate the deformation displacement of foundation ditch, keep the foundation ditch to be in steady state, be particularly useful for by the foundation ditch have subway tunnel, ancient building etc. to apply in the foundation ditch deformation control requires high foundation ditch engineering.
In particular, as shown in fig. 2, the self-adjusting prestressing device further comprises two pressing elements 4.2 which can be spread apart from each other. The electro-hydraulic jack is positioned between the two pressurizing pieces and is used for strutting the two pressurizing pieces.
In this embodiment, as shown in fig. 1, the self-adjusting prestressing device is located between the surrounding purlin beam and one end of the section steel supporting beam, and the other end of the section steel supporting beam abuts against the surrounding purlin beam. The flexible direction of electro-hydraulic jack parallels with a shaped steel supporting beam. The section steel supporting beams are horizontally distributed.
Further, the pit deformation displacement monitor includes a laser rangefinder (not shown in the figure). The laser range finder is used for monitoring the foundation pit distance of the position of the profile steel supporting beam, and the foundation pit distance is the foundation pit distance in the length direction of the profile steel supporting beam. Therefore, the pit distance of the foundation pit at the position of the profile steel supporting beam can be monitored in real time through the laser range finder, once the laser range finder detects that the pit distance of the foundation pit changes, the foundation pit is subjected to deformation displacement, and specifically, when the pit distance of the foundation pit becomes smaller, the inner wall of the foundation pit is subjected to deformation displacement towards the inner side of the foundation pit; and if the pit distance of the foundation pit is increased, the deformation and displacement of the inner wall of the foundation pit towards the outer side of the foundation pit are indicated.
Further, the self-adjusting prestressing device further comprises a pressure detecting sensor (not shown in the figure). The electric hydraulic jack comprises a hydraulic cylinder and an electric pump station. The pressure detection sensor is used for detecting the pressure in one end of the two ends of the hydraulic cylinder, which is opposite to the piston rod of the hydraulic cylinder. Therefore, the pressure in the hydraulic cylinder can be detected through the pressure detection sensor, and the pre-pressure applied to the steel support beam by the electric hydraulic jack is prevented from exceeding a set value.
Furthermore, the oil inlet and the oil outlet at two ends of the hydraulic cylinder are respectively provided with an electromagnetic switch valve (not shown in the figure). Therefore, after the electric hydraulic jack finishes prestressing and adjusts the prestressing, the hydraulic cylinder can be locked to apply the prestressing force by closing the electromagnetic switch valve, and the prestress applied to the section steel support beam caused by leakage of an oil pipeline of the electric hydraulic jack is prevented from changing.
Further, as shown in fig. 2, the self-adjusting prestressing device further comprises a guide box 4.3. The guide box comprises an upper limit plate 4.32 and a left side limit plate 4.31 and a right side limit plate 4.31 which are parallel to each other. The upper limiting plate is parallel to the telescopic direction of the electric hydraulic jack, and the side limiting plates are parallel to the telescopic direction of the electric hydraulic jack. The inner cavity surrounded by the guide box forms a guide cavity of the pressurizing part. Two pressure parts are located in the pressure part guide cavity, the upper limiting plate and the two side limiting plates are fixed on one of the pressure parts, and the other pressure part can move in the pressure part guide cavity along the telescopic direction of the electric hydraulic jack. In this embodiment, the upper limiting plate is perpendicular to the side limiting plates, the upper limiting plates are distributed horizontally, and the upper limiting plates are multiple. So, can carry on spacingly to the moving direction of pressurization piece through last spacing board and two side limiting plates of left and right sides, exert prestressing force and adjust the prestressing force in-process at the electro-hydraulic jack, the pressurization piece can be followed and limited the direction and removed, guarantees that shaped steel supporting beam can not the lateral instability.
The guide box further comprises a lower limiting plate. The lower limiting plate is parallel to the upper limiting plate. The lower limiting plate is located below the upper limiting plate, the lower limiting plate is parallel to the telescopic direction of the electric hydraulic jack, the lower limiting plate is fixed on one of the pressurizing pieces, and the lower limiting plate and the upper limiting plate are fixed on the same pressurizing piece. In this embodiment, the lower limiting plate has a plurality of blocks. Thus, the position of the pressing member in the moving direction can be further increased.
A supporting piece is also arranged between the two pressing pieces. The pressurizing piece comprises H-shaped steel and a plurality of reinforcing plates arranged between two flange plates of the H-shaped steel.
The second embodiment is the same as the first embodiment, except that,
as shown in fig. 3, a plurality of triangular supporting members 5 are arranged on the inner side surface of the enclosing purlin beam, and the triangular supporting members are fixed on the enclosing purlin beam through bolts. The self-adjusting type prestress device is positioned between one triangular support piece and one end of the section steel support beam, and the other end of the section steel support beam is propped against the other triangular support piece. The telescopic direction of the electric hydraulic jack is parallel to the section steel supporting beam.
The third embodiment is the same as the first embodiment, except that,
as shown in fig. 4, a plurality of triangular supporting members 5 are arranged on the inner side surface of the enclosing purlin beam. In this embodiment, a shaped steel supporting beam both ends are supported on enclosing the purlin roof beam through tip supporting beam subassembly respectively, and tip supporting beam subassembly is the V font and distributes, and it includes that two are the V font and distribute tip supporting beam 6, and two tip supporting beam one ends are supported on the triangular supports piece on enclosing the medial surface of purlin roof beam, and two tip supporting beam's the other end supports in shaped steel supporting beam's tip through same triangular supports piece. The self-adjusting prestress device is positioned at one end of the section steel supporting beam. The telescopic direction of the electric hydraulic jack is parallel to the section steel supporting beam.
In a fourth embodiment, the remaining structure of the present embodiment refers to the first embodiment, and the difference therebetween,
the inner side surface of the enclosing purlin beam is provided with a plurality of triangular supporting pieces. In this embodiment, a shaped steel supporting beam both ends are supported on enclosing the purlin roof beam through tip supporting beam subassembly respectively, and tip supporting beam subassembly is the V font and distributes, and it includes that two are the V font and distribute tip supporting beam and be located the triangle support piece of two tip supporting beam one ends, and two tip supporting beam one end are supported on the triangle support piece on the medial surface of enclosing the purlin roof beam, and the other end of two tip supporting beams supports in the tip of shaped steel supporting beam through same triangle support piece. The profile steel supporting beam consists of two sections of supporting beams, and the self-adjusting prestress device is positioned between the two sections of supporting beams.
The above, only be the preferred embodiment of the utility model, it is not right the utility model discloses do any restriction, all according to the utility model discloses any simple modification, change and equivalent transformation that the technical essence was done to above embodiment all still belong to the technical scheme's of the utility model protection scope.
Claims (10)
1. A foundation pit support system capable of automatically adjusting pre-stress, comprising:
a foundation pit enclosure wall;
the enclosing purlin beam is arranged on the inner side of the foundation pit enclosing wall;
the steel support beams are supported between the surrounding purlin beams;
the method is characterized by further comprising the following steps:
the self-adjusting prestress device provides prestress for the section steel supporting beam so that the section steel supporting beam is supported between the surrounding purlin beams, and comprises an electric hydraulic jack and a foundation pit deformation displacement monitor which is used for monitoring the foundation pit deformation displacement of the position where the section steel supporting beam is located.
2. The foundation pit supporting system capable of automatically adjusting prestress according to claim 1, wherein the foundation pit deformation displacement monitor comprises a laser range finder for monitoring a pit pitch of the position of the section steel supporting beam, the pit pitch being a pit pitch in a length direction of the section steel supporting beam.
3. The foundation pit supporting system capable of automatically adjusting prestress according to claim 1, wherein the purlin enclosing beam is a steel purlin.
4. A foundation pit supporting system capable of automatically adjusting prestress according to claim 1, 2 or 3, wherein the self-adjusting prestress device further comprises two pressure members capable of being mutually expanded, and the electro-hydraulic jack is located between the two pressure members and is used for expanding the two pressure members.
5. The foundation pit supporting system capable of automatically adjusting the prestress according to claim 4, wherein the self-adjusting prestress device further comprises a guide box, the guide box comprises an upper limiting plate and a left side limiting plate and a right side limiting plate which are parallel to each other, the upper limiting plate is parallel to the telescopic direction of the electro-hydraulic jack, the side limiting plates are parallel to the telescopic direction of the electro-hydraulic jack, an inner cavity defined by the guide box forms a pressurizing part guide cavity, the two pressurizing parts are located in the pressurizing part guide cavity, the upper limiting plate and the two side limiting plates are both fixed on one of the pressurizing parts, and the other pressurizing part can move in the pressurizing part guide cavity along the telescopic direction of the electro-hydraulic jack.
6. The foundation pit supporting system capable of automatically adjusting the prestress according to claim 5, wherein the guide box further comprises a lower limiting plate, the lower limiting plate is located below the upper limiting plate, the lower limiting plate is parallel to the telescopic direction of the electro-hydraulic jack, the lower limiting plate is fixed on one of the pressurizing members, and the lower limiting plate and the upper limiting plate are fixed on the same pressurizing member.
7. The foundation pit supporting system capable of automatically adjusting prestress according to claim 4, wherein a supporting member is further arranged between the two pressing members.
8. The foundation pit supporting system capable of automatically adjusting prestress according to claim 4, wherein the pressurizing member comprises an H-shaped steel and a plurality of reinforcing plates arranged between two flange plates of the H-shaped steel.
9. A foundation pit supporting system capable of automatically adjusting prestress according to claim 1, 2 or 3, wherein the self-adjusting prestress device further comprises a pressure detection sensor, the electric hydraulic jack comprises a hydraulic cylinder and an electric pump station, and the pressure detection sensor is used for detecting the pressure in one end of two ends of the hydraulic cylinder, which is opposite to a piston rod of the hydraulic cylinder.
10. The foundation pit supporting system capable of automatically adjusting the prestress according to claim 9, wherein the oil inlet and the oil outlet at two ends of the hydraulic cylinder are provided with electromagnetic switch valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220969715.8U CN218479173U (en) | 2022-04-21 | 2022-04-21 | Foundation pit supporting system capable of automatically adjusting prestress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220969715.8U CN218479173U (en) | 2022-04-21 | 2022-04-21 | Foundation pit supporting system capable of automatically adjusting prestress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218479173U true CN218479173U (en) | 2023-02-14 |
Family
ID=85163356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220969715.8U Active CN218479173U (en) | 2022-04-21 | 2022-04-21 | Foundation pit supporting system capable of automatically adjusting prestress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218479173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369886A (en) * | 2022-04-21 | 2022-11-22 | 东通岩土科技股份有限公司 | Tool type supporting system capable of automatically adjusting axial force for foundation pit |
-
2022
- 2022-04-21 CN CN202220969715.8U patent/CN218479173U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369886A (en) * | 2022-04-21 | 2022-11-22 | 东通岩土科技股份有限公司 | Tool type supporting system capable of automatically adjusting axial force for foundation pit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103205940B (en) | Continuous beam bridging slope ratio replaces jack-up construction method | |
| CN203613546U (en) | Strain compensation device of reinforced concrete inner support in ultra-large type foundation pit | |
| CN218479173U (en) | Foundation pit supporting system capable of automatically adjusting prestress | |
| CN108951658B (en) | Deep foundation pit section steel supporting system based on active control | |
| CN104989114A (en) | Sliding construction device and method for large-span arc-shaped roof | |
| US20100115860A1 (en) | Girder element for concrete formwork comprising a structure for automatically compensating bending strains | |
| CN103266566A (en) | Walk-type continuous pushing system and construction method | |
| CN108824443A (en) | Precisely adjust the device and its loading method of foundation pit steel support brace pre axial force | |
| CN113389204B (en) | Construction method of deep foundation pit sliding type rapid pre-support system | |
| CN105201219B (en) | A kind of structure synchronization discharge mechanism and its construction method | |
| CN118186924A (en) | Multi-point curve pushing method for steel structure bridge | |
| CN102704412A (en) | Construction process for lifting broken pillars of bridge | |
| CN115369886A (en) | Tool type supporting system capable of automatically adjusting axial force for foundation pit | |
| CN105155418A (en) | Construction method for bridge horizontal movement | |
| CN113718665A (en) | Bridge pier changing method | |
| CN114059550B (en) | Shaft force checking and regulating system and method for foundation pit servo steel support system | |
| CN215053035U (en) | Novel intelligent servo force-protecting box equipment supported by profile steel | |
| US4053138A (en) | Method of lifting or lowering an object by means of a plurality of so-called climbing jacks | |
| CN210665325U (en) | Assembled high temperature loading test platform | |
| CN210482063U (en) | Wedge-shaped device for bottom die unloading | |
| CN102704398B (en) | Jacking construction method of capping beam | |
| CN218669409U (en) | Welding-free load adjusting device and load adjusting system | |
| KR20030096811A (en) | Strut .omitted | |
| CN214883723U (en) | Stress adjusting device | |
| CN107265349A (en) | The locking device and locking method of bolt-type jack up drilling platform and its jacking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |