CN112779915A - Steel support prestress loading and unloading device for foundation pit supporting engineering - Google Patents
Steel support prestress loading and unloading device for foundation pit supporting engineering Download PDFInfo
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- CN112779915A CN112779915A CN202110047425.8A CN202110047425A CN112779915A CN 112779915 A CN112779915 A CN 112779915A CN 202110047425 A CN202110047425 A CN 202110047425A CN 112779915 A CN112779915 A CN 112779915A
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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
Abstract
The invention discloses a steel support prestress loading and unloading device for a foundation pit supporting engineering, which comprises supporting steel bodies, a lower bearing plate, a telescopic frame part, a shearing stress loading and unloading assembly and a positioning pre-locking assembly, wherein a plurality of supporting steel bodies are uniformly arranged around the side surface of the lower bearing pressure plate, the lower bearing pressure plate is attached to the bottom of a construction foundation pit, the supporting steel bodies are attached to the inner wall of the side wall of the construction foundation pit through the local deflection effect and are jacked and supported by the supporting steel bodies; the supporting steel body is hinged with a telescopic frame piece through a pin shaft piece, the upper end face of the lower bearing pressure plate is provided with a limiting shaft seat used for being connected with the telescopic frame piece, the supporting steel body is evenly provided with a plurality of positioning pre-locking assemblies, and the supporting steel body is vertically provided with a shearing stress loading and unloading assembly in a penetrating mode.
Description
Technical Field
The invention relates to the technical field of foundation pit supporting equipment, in particular to a steel support prestress loading and unloading device for a foundation pit supporting engineering.
Background
The pit foundation is a soil pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. Before excavation, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site, and waterproof drainage work is performed. The person who is not excavated can use the method of putting the side slope to stabilize the earth slope, and the size of the slope is determined according to the relevant construction regulations. A foundation wall supporting method for excavating a deeper and adjacent usable pit of a building, a concrete spraying wall protection method lamp; in the prior art, along with the development of a large number of high-rise buildings and underground spaces, a basement is often changed in use function, part of underground space structures are added, and the excavation depth of corresponding foundation pits is also increased, so that the stress of the original supporting structure is extremely unfavorable, the instability probability of the supporting structure is higher and higher, the corresponding pre-support is generally carried out by estimating the depth of the foundation pit or the section inclination of the foundation pit, the corresponding adjustment is carried out again after the foundation pit engineering is completely determined, but the whole adjustment process is relatively complicated, so that a steel support prestress loading and unloading device for the foundation pit supporting engineering is needed to be provided, and the problems are solved.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: a steel support prestress loading and unloading device for foundation pit supporting engineering comprises supporting steel bodies, a lower bearing plate, a telescopic frame piece, a shear stress loading and unloading assembly and a positioning pre-locking assembly, wherein a plurality of supporting steel bodies are uniformly arranged on the periphery of the side face of the lower bearing pressure plate, one end of each supporting steel body is connected with the lower bearing pressure plate in a relatively rotating mode through a locking screw piece, the lower bearing pressure plate is attached to the bottom of a construction foundation pit, the supporting steel bodies are attached to the inner wall of the side wall of the construction foundation pit through local deflection, and the supporting steel bodies are used for jacking and supporting the supporting steel bodies;
an expansion bracket part is hinged on the supporting steel body through a pin shaft part, and a limiting shaft seat used for connecting the expansion bracket part is arranged on the upper end surface of the lower bearing pressure plate, so that the expansion bracket part can be used for supporting the supporting steel body in an auxiliary manner when the supporting steel body supports the side wall of the foundation pit;
a plurality of positioning pre-locking assemblies are uniformly arranged on the supporting steel body, and each positioning pre-locking assembly performs space positioning on the supporting steel body after the supporting steel body determines a supporting point position;
and the supporting steel body is also vertically provided with a shear stress loading and unloading assembly in a penetrating manner, and the shear stress loading and unloading assembly provides vertical cut stress for the supporting steel body after the supporting steel body is preliminarily positioned, so that the supporting steel body provides different supporting stresses for the side wall of the foundation pit according to foundation pit construction requirements.
As a preferred technical scheme of the invention, the positioning pre-locking assembly comprises a connecting screw and a positioning guide sleeve, a plurality of built-in concave holes for mounting the connecting screw are vertically arranged on the supporting steel body, and the connecting screw can be limited in the built-in concave holes in a relatively sliding manner and extend to the outer side; the positioning guide sleeve is correspondingly embedded into the side wall of the construction foundation pit, and the support steel body is preliminarily positioned and arranged in the foundation pit under the threaded meshing action of the connecting screw and the positioning guide sleeve.
As a preferred technical scheme of the invention, the shear stress loading and unloading assembly comprises a reinforcing support, a connecting column piece, an external support positioning assembly and a jacking disk body, wherein the connecting column piece vertically penetrates through the supporting steel body, the connecting column piece is connected to the supporting steel body in a sliding manner, and one end of the connecting column piece is vertically cut into the side wall of the construction foundation pit;
a reinforcing support is embedded in a corresponding position in the side wall of the construction foundation pit and fixed in a rock stratum of the side wall of the foundation pit through a plurality of supporting guide rods on the circumferential side wall of the reinforcing support;
the connecting column vertically penetrates through the reinforcing support and is in sliding connection with the reinforcing support, a plurality of external support positioning assemblies are arranged on the connecting column in an upward mode, and the circumference of each external support positioning assembly is externally supported after the connecting column determines the depth length, so that the connecting column is locally clamped and fixed in a foundation pit rock layer;
one side of the connecting column close to the supporting steel body is provided with a jacking disc body which can rotate relatively under the thread meshing effect, and the jacking disc body provides vertical jacking stress for the supporting steel body, so that the supporting steel body slides on the connecting column in a limiting manner.
As a preferred technical scheme of the present invention, the external bracing positioning assembly includes a fixed disk seat, a guide sleeve, a transfer support rod, a support rib and a loading seat, wherein the fixed disk seat is mounted on the connecting column, and a bearing is further disposed between the fixed disk seat and the connecting column, so that the connecting column can be relatively rotatably disposed in the fixed disk seat;
the inner circumference of the fixed disk seat is provided with a plurality of supporting ribs in an array manner, the supporting ribs can be limited in the fixed disk seat in a relatively sliding manner, and one end of each supporting rib extends out of the fixed disk seat and extends to the outer side;
a loading seat is fixed at one end of the support rib, and the loading seat is used for externally supporting and positioning the rock stratum wall in the foundation pit;
the connecting column piece is provided with a guide sleeve piece in a sliding mode through a thread meshing transmission effect, a plurality of transmission supporting rods are hinged to the circumferential side wall of the guide sleeve piece, one ends of the transmission supporting rods are hinged to the supporting ribs, and therefore when the guide sleeve piece slides transversely along the connecting column piece, the transmission supporting rods drive the supporting ribs to extend outwards and expand.
As a preferred technical scheme of the invention, the cross section of the loading seat is in a trapezoidal structure, the two sides of the loading seat are symmetrically and obliquely provided with the bearing parts, and the auxiliary spring is connected between the bearing parts and the loading seat, so that when the supporting steel body is subjected to shear stress loading and unloading through the connecting column part, the loading seat is provided with lateral jacking force by the bearing parts and is fixed in a foundation pit stratum.
As a preferred technical scheme of the present invention, the connecting column is internally and coaxially provided with a mounting support member capable of relatively sliding through screw-thread engagement transmission, one end of the mounting support member extending into the foundation pit rock stratum is fixed with a spiral cutting member, and the spiral cutting member provides a transverse loading traction force to the connecting column through a rotary cutting action of the spiral cutting member when the connecting column is embedded and positioned in the foundation pit rock stratum.
As a preferred technical solution of the present invention, a fitting member is further fixed on an outer circumferential side wall of the top pressing plate body, and a cross-sectional side wall of the fitting member protrudes out of the top pressing plate body in a general state, so that when the top pressing plate body approaches the supporting steel body through threaded engagement, the supporting steel body is firstly elastically supported by the fitting member, and after loading, rigid top pressing and supporting are performed by the top pressing plate body.
As a preferable technical scheme of the invention, a plurality of built-in shaft elements are arranged on the circumference of one side of the conjunction element close to the supporting steel body.
Compared with the prior art, the invention provides a steel support prestress loading and unloading device for foundation pit supporting engineering, which has the following beneficial effects:
according to the invention, the supporting steel body is preliminarily positioned by the positioning pre-locking assembly, so that the supporting steel body can be subjected to prestress loading and unloading by the shearing stress loading and unloading assembly within the engineering construction adjustment range, the damage to the internal structure of the foundation pit can be reduced, and the phenomena of insufficient stress generated inside and support shaking are prevented; the supporting steel body is locally fixed by penetrating the connecting column piece on the supporting steel body and embedding and fixing one end of the connecting column piece in a rock stratum on the side wall of the foundation pit by the external supporting positioning assembly, and in stress loading and unloading adjustment, on one hand, rough adjustment of stress loading and unloading can be realized through the rotary cutting action of the spiral cutting piece; on the other hand, the fine adjustment of stress loading and unloading is realized through the screw thread rotation action of the jacking pressing disc body; and the deep relative position of the external support positioning component can be changed all the time in the coarse adjustment process, so that the corresponding stress loading and unloading can be carried out in the adjustment range, the damage to the internal structure of the foundation pit is reduced, and the internal support strength is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a positioning prelock assembly of the present invention;
FIG. 3 is a schematic structural view of a shear stress unloading assembly according to the present invention;
FIG. 4 is a schematic structural view of the outer support positioning assembly of the present invention;
FIG. 5 is an enlarged view of the point A in FIG. 4;
FIG. 6 is a schematic view of a top press plate according to the present invention;
in the figure: the device comprises a supporting steel body 1, a lower bearing plate 2, an expansion bracket 3, a positioning pre-locking assembly 4, a connecting screw 401, a positioning guide sleeve 402, a shearing stress loading and unloading assembly 5, a connecting column 501, a reinforcing support 502, a supporting guide rod 503, a pressing disc 6, a fitting part 601, a built-in shaft 602, an external supporting positioning assembly 7, a fixing disc seat 701, a guiding sleeve 702, a transmission support rod 703, a supporting rib 704, a spiral cutting part 705, a loading seat 8, an auxiliary spring 801 and a bearing 802.
Detailed Description
Referring to fig. 1, the present invention provides a technical solution: a steel support prestress loading and unloading device for foundation pit supporting engineering comprises supporting steel bodies 1, a lower bearing plate 2, a telescopic frame piece 3, a shearing stress loading and unloading assembly 5 and a positioning pre-locking assembly 4, wherein a plurality of supporting steel bodies 1 are uniformly arranged on the periphery of the side surface of the lower bearing plate 2, one end of each supporting steel body 1 is connected with the lower bearing plate 2 in a relatively rotating mode through a locking screw piece, the lower bearing plate 2 is attached to the bottom of a construction foundation pit, the supporting steel bodies 1 are attached to the inner wall of the side wall of the construction foundation pit through local deflection, and the supporting steel bodies 1 are used for jacking and supporting the supporting steel bodies;
the supporting steel body 1 is hinged with an expansion bracket piece 3 through a pin shaft piece, and the upper end face of the lower bearing pressure plate 2 is provided with a limit shaft seat for connecting the expansion bracket piece 3, so that the expansion bracket piece 3 is used for supporting the supporting steel body 1 in an auxiliary way when the side wall of the foundation pit is supported;
a plurality of positioning pre-locking assemblies 4 are uniformly arranged on the supporting steel body 1, and each positioning pre-locking assembly 4 performs space positioning on the supporting steel body 1 after a supporting point position is determined by the supporting steel body 1;
the supporting steel body 1 is vertically provided with a shear stress loading and unloading assembly 5 in a penetrating mode, the shear stress loading and unloading assembly 5 provides vertical cutting stress for the supporting steel body 1 after the supporting steel body 1 is preliminarily positioned, so that the supporting steel body 1 provides different supporting stresses for the side wall of the foundation pit according to foundation pit construction requirements, attention needs to be paid to the fact that the supporting steel body is preliminarily positioned in time in the space direction by the positioning pre-locking assembly, and after the supporting steel body is completely positioned, the shear stress loading and unloading assembly loads and unloads the prestress of the vertical side wall of the foundation pit, and therefore stress adjustment of the supporting steel body is achieved.
Referring to fig. 2, in this embodiment, the positioning pre-locking assembly 4 includes a connecting screw 401 and a positioning guide sleeve 402, a plurality of built-in concave holes for installing the connecting screw 401 are arranged in an upper-lower row of the supporting steel body 1, and the connecting screw 401 is limited in the built-in concave holes in a relatively slidable manner and extends to the outside; the positioning guide sleeve 402 is correspondingly embedded in the side wall of the construction foundation pit, and the support steel body 1 is preliminarily positioned and arranged in the foundation pit under the threaded meshing action of the connecting screw 401 and the positioning guide sleeve 402.
Referring to fig. 3, in this embodiment, the shear stress loading and unloading assembly 5 includes a reinforcing support 502, a connecting column 501, an external support positioning assembly 7, and a top pressing plate 6, where the connecting column 501 vertically penetrates through the supporting steel body 1, the connecting column 501 is slidably connected to the supporting steel body 1, and one end of the connecting column is vertically cut into a side wall of a construction foundation pit;
a reinforcing support 502 is embedded in a corresponding position in the side wall of the construction foundation pit, and the reinforcing support 502 is fixed in a rock stratum of the side wall of the foundation pit through a plurality of support guide rods 503 on the circumferential side wall of the reinforcing support;
the connecting column 501 vertically penetrates through the reinforcing support 502 and is in sliding connection with the reinforcing support 502, a plurality of external support positioning assemblies 7 are arranged on the connecting column 501, and the circumferences of the external support positioning assemblies 7 are externally supported after the connecting column determines the depth length, so that the connecting column 501 is locally clamped and fixed in the rock layer of the foundation pit;
one side of the connecting column 501, which is close to the supporting steel body 1, can be provided with a jacking disc body 6 in a relatively rotating mode through a thread meshing effect, the jacking disc body 6 provides vertical jacking stress for the supporting steel body 1, so that the supporting steel body 1 slides in a limiting mode on the connecting column 501, one end of the connecting column is fixed in a rock stratum of the side wall of the foundation pit in a limiting mode through an external supporting positioning assembly, the supporting steel body is pressed on the side wall of the foundation pit through the jacking disc body, and limiting adjustment of the supporting steel body is achieved.
Referring to fig. 4, in this embodiment, the external bracing positioning assembly 7 includes a fixed disk seat 701, a guide sleeve 702, a coupling support rod 703, a support rib 704, and a loading seat 8, where the fixed disk seat 701 is installed on the connecting column 501, and a bearing is further disposed between the fixed disk seat 701 and the connecting column 501, so that the connecting column 501 is relatively rotatably disposed in the fixed disk seat 701;
a plurality of support ribs 704 are arranged in the inner circumference array of the fixed disk seat 701, the support ribs 704 are arranged in the fixed disk seat 701 in a limiting manner and can slide relatively, and one end of each support rib extends out of the fixed disk seat 701 and extends to the outside;
a loading seat 8 is fixed at one end of the support rib 704, and the loading seat 8 is used for externally supporting and positioning the rock stratum wall in the foundation pit;
connecting column 501 is gone up and is provided with direction external member 702 through the slip of screw-thread engagement drive effect, it connects branch 703 to articulate on the circumference lateral wall of direction external member has a plurality of biography, the one end that passes to connect branch 703 with brace rod 704 is articulated mutually, makes and works as direction external member 702 follows connecting column 501 carries out transverse sliding, biography connects branch 703 drive brace rod 704 stretches out the expansion outward, can effectively with connecting column temporarily fix in the foundation ditch stratum rock, has higher stability.
Referring to fig. 5, in this embodiment, the cross section of the loading base 8 is a trapezoid structure, two sides of the loading base 8 are symmetrically and obliquely installed with receiving parts 802, and an auxiliary spring 801 is connected between the receiving parts 802 and the loading base 8, so that when the supporting steel body 1 is subjected to shear stress loading and unloading by the connecting column 501, the loading base 8 is provided with lateral top pressure by the receiving parts 802 and is fixed in a rock stratum of a foundation pit.
In this embodiment, the connecting column 501 is internally and coaxially provided with a mounting support member capable of sliding relatively through thread engagement transmission, one end of the mounting support member extending into the foundation pit rock stratum is fixed with a spiral cutting member 705, the spiral cutting member 705 provides transverse loading traction force for the connecting column member through the rotary cutting action of the spiral cutting member when the connecting column member is embedded and positioned in the foundation pit rock stratum, and in the corresponding axial rotary cutting of the spiral cutting member, the bearing members on both sides of the loading seat are correspondingly pressed with the inner wall of the foundation pit rock stratum through the internal elastic force action of the bearing members, so that the stress adjustment is performed on the supporting steel body while the positioning of the internal external supporting and positioning component is not changed, the construction failure degree is reduced, and the internal stability of the foundation pit is ensured.
Referring to fig. 6, in this embodiment, an engagement member 601 is further fixed on an outer circumferential side wall of the top pressing plate 6, and a cross-sectional side wall of the engagement member 601 protrudes out of the top pressing plate 6 in a normal state, so that when the top pressing plate 6 approaches the supporting steel body 1 through threaded engagement, the supporting steel body 1 is firstly supported by the engagement member 601 in a springing manner, and is rigidly supported by the top pressing plate 6 after being loaded.
In this embodiment, a plurality of built-in shafts 602 are arranged on the circumference of the engaging member 601 near one side of the supporting steel body 1.
Specifically, when the steel body supporting prestress is adjusted in foundation pit supporting, firstly, a supporting steel body is preliminarily positioned inside a foundation pit (including a space deflection angle, a supporting area and the like) by a positioning pre-locking assembly, and then the supporting steel body is arranged on the foundation pit in a limiting and sliding manner by a connecting column piece; after the preliminary engineering is determined, one end of the connecting column piece is embedded and fixed in the inner wall of the foundation pit rock stratum by a plurality of groups of external support positioning assemblies, coarse adjustment can be carried out through the spiral cutting piece when the supporting stress of the supporting steel body is loaded and unloaded, and at the moment, the bearing pieces on the two sides of the loading seat are correspondingly pressed with the inner wall of the foundation pit rock stratum through the internal elastic action of the bearing pieces; meanwhile, the supporting stress of the supporting steel body can be finely adjusted through the thread meshing transmission of the jacking pressing disc body, the accuracy of the supporting stress loading and unloading regulation is improved, and the damage to the internal structure of the foundation pit is further reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention, and the technical solution and the inventive concept thereof should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a steel shotcrete prestressing force loading and unloading device for excavation supporting engineering, its is including strutting steel body (1), lower bearing plate (2), expansion bracket spare (3), shearing stress loading and unloading subassembly (5) and location prelock subassembly (4), wherein, the side that bears clamp plate (2) down is equipped with a plurality of steel bodies (1) of strutting all around evenly arranged, each but the one end of strutting steel body (1) through locking spiral shell spare relatively pivoted with bear clamp plate (2) down and be connected its characterized in that: the lower bearing pressing plate (2) is attached to the bottom of the construction foundation pit, the supporting steel body (1) is attached to the inner wall of the side wall of the construction foundation pit through a local deflection effect, and the supporting steel body (1) is used for supporting and jacking;
an expansion bracket piece (3) is hinged to the supporting steel body (1) through a pin shaft piece, and a limiting shaft seat used for connecting the expansion bracket piece (3) is arranged on the upper end face of the lower bearing pressure plate (2), so that the expansion bracket piece (3) can be used for supporting the supporting steel body (1) in an auxiliary mode when the side wall of the foundation pit is supported;
a plurality of positioning pre-locking assemblies (4) are uniformly arranged on the supporting steel body (1), and each positioning pre-locking assembly (4) performs space positioning on the supporting steel body (1) after the supporting point position is determined by the supporting steel body (1);
the supporting steel body (1) is also vertically provided with a shear stress loading and unloading assembly (5) in a penetrating mode, the shear stress loading and unloading assembly (5) provides vertical shear stress for the supporting steel body (1) after the supporting steel body (1) is initially positioned, and therefore the supporting steel body (1) provides different supporting stress for the side wall of the foundation pit according to foundation pit construction infrastructure requirements.
2. The steel support prestress loading and unloading device for foundation pit supporting engineering according to claim 1, characterized in that: the positioning pre-locking assembly (4) comprises a connecting screw piece (401) and a positioning guide sleeve (402), a plurality of built-in concave holes for mounting the connecting screw piece (401) are arranged in an up-down manner on the supporting steel body (1), and the connecting screw piece (401) can be limited in the built-in concave holes in a relatively sliding manner and extend to the outer side; the positioning guide sleeve (402) is correspondingly embedded in the side wall of the construction foundation pit, and the support steel body (1) is preliminarily positioned and arranged in the foundation pit under the threaded meshing action of the connecting screw piece (401) and the positioning guide sleeve (402).
3. The steel support prestress loading and unloading device for foundation pit supporting engineering according to claim 1, characterized in that: the shear stress loading and unloading assembly (5) comprises a reinforcing support (502), a connecting column piece (501), an external support positioning assembly (7) and a jacking disc body (6), wherein the connecting column piece (501) vertically penetrates through the supporting steel body (1), the connecting column piece (501) is connected to the supporting steel body (1) in a sliding mode, and one end of the connecting column piece is vertically cut into the side wall of the construction foundation pit;
a reinforcing support (502) is embedded in a corresponding position in the side wall of the construction foundation pit, and the reinforcing support (502) is fixed in a rock stratum of the side wall of the foundation pit through a plurality of supporting guide rods (503) on the circumferential side wall of the reinforcing support;
the connecting column (501) vertically penetrates through the reinforcing support (502) and is in sliding connection with the reinforcing support (502), a plurality of external support positioning assemblies (7) are arranged in the connecting column (501), and each external support positioning assembly (7) is supported outwards circumferentially after the connecting column determines the depth length, so that the connecting column (501) is locally clamped in the rock layer of the foundation pit;
one side of the connecting column piece (501), which is close to the supporting steel body (1), can be provided with a jacking disc body (6) in a relatively rotating mode through a thread meshing effect, and the jacking disc body (6) provides vertical jacking stress for the supporting steel body (1), so that the supporting steel body (1) slides on the connecting column piece (501) in a limiting mode.
4. The steel support prestress loading and unloading device for foundation pit supporting engineering according to claim 3, characterized in that: the external support positioning assembly (7) comprises a fixed disc seat (701), a guide sleeve piece (702), a transmission support rod (703), a support rib (704) and a loading seat (8), wherein the fixed disc seat (701) is installed on the connecting column piece (501), and a bearing is further arranged between the fixed disc seat (701) and the connecting column piece (501), so that the connecting column piece (501) can be arranged in the fixed disc seat (701) in a relatively rotating manner;
the inner circumference array of the fixed disk seat (701) is provided with a plurality of supporting ribs (704), the supporting ribs (704) can be limited in the fixed disk seat (701) in a relatively sliding way, and one end of each supporting rib extends out of the fixed disk seat (701) and extends to the outside;
a loading seat (8) is fixed at one end of the support rib (704), and the loading seat (8) is used for externally supporting and positioning the rock stratum wall in the foundation pit;
the connecting column piece (501) is provided with a guide sleeve piece (702) in a sliding mode through thread meshing transmission, a plurality of transmission and connection supporting rods (703) are hinged to the circumferential side wall of the guide sleeve piece, one end of each transmission and connection supporting rod (703) is hinged to the supporting rib (704), and when the guide sleeve piece (702) slides transversely along the connecting column piece (501), the transmission and connection supporting rods (703) drive the supporting rib (704) to extend outwards and expand.
5. The steel support prestress loading and unloading device for foundation pit supporting engineering according to claim 4, characterized in that: the transversal trapezium structure of personally submitting of loading seat (8), just loading seat (8) bilateral symmetry slope installs receiving (802), receiving (802) with be connected with auxiliary spring (801) between loading seat (8), make and work as when strutting steel body (1) and carry out shear stress by connecting column spare (501) and unload, loading seat (8) by receiving (802) provide the side direction roof pressure and fix in the foundation ditch rock stratum.
6. The steel support prestress loading and unloading device for foundation pit supporting engineering according to claim 4, characterized in that: the connecting column piece (501) is internally and coaxially provided with a mounting support piece through thread meshing transmission and capable of sliding relatively, one end, extending into a foundation pit rock stratum, of the mounting support piece is fixedly provided with a spiral cutting piece (705), and the spiral cutting piece (705) provides transverse loading traction force for the connecting column piece through the rotary cutting action of the spiral cutting piece when the connecting column piece is embedded and positioned in the foundation pit rock stratum.
7. The steel support prestress loading and unloading device for foundation pit supporting engineering according to claim 3, characterized in that: the outer circumferential side wall of the top pressing plate body (6) is further fixed with a conjunction piece (601), the cross section side wall of the conjunction piece (601) protrudes out of the top pressing plate body (6) in a general state, so that when the top pressing plate body (6) is close to the supporting steel body (1) through threaded engagement, the conjunction piece (601) firstly elastically supports the supporting steel body (1), and after loading, the top pressing plate body (6) is used for rigid top pressing support.
8. The steel support prestress loading and unloading device for foundation pit supporting engineering according to claim 7, characterized in that: and a plurality of built-in shaft pieces (602) are arranged on the circumference of one side of the conjunction piece (601) close to the supporting steel body (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110047425.8A CN112779915A (en) | 2021-01-15 | 2021-01-15 | Steel support prestress loading and unloading device for foundation pit supporting engineering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110047425.8A CN112779915A (en) | 2021-01-15 | 2021-01-15 | Steel support prestress loading and unloading device for foundation pit supporting engineering |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130085776A (en) * | 2012-01-20 | 2013-07-30 | 정진덕 | Structure of retaining wall for underground connection structure construction method in low depth |
| CN105239569A (en) * | 2015-09-24 | 2016-01-13 | 河海大学 | Multi-section jointed recoverable screw enlarging-head anchor rod structure and construction method thereof |
| CN109113077A (en) * | 2018-10-17 | 2019-01-01 | 李慧 | A kind of cunicular foundation pit supporting construction of foundation pit side-wall |
| CN110230316A (en) * | 2019-06-13 | 2019-09-13 | 黄河交通学院 | A kind of civil engineering foundation pit support device |
| CN211143081U (en) * | 2019-09-20 | 2020-07-31 | 岳连成 | Subway deep basal pit supporting construction |
| CN111794247A (en) * | 2020-07-28 | 2020-10-20 | 广东万信建设工程科技有限公司 | Foundation pit supporting structure and construction method thereof |
| CN211898446U (en) * | 2019-12-23 | 2020-11-10 | 殷雪英 | Hydraulic engineering side slope construction protective structure |
-
2021
- 2021-01-15 CN CN202110047425.8A patent/CN112779915A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130085776A (en) * | 2012-01-20 | 2013-07-30 | 정진덕 | Structure of retaining wall for underground connection structure construction method in low depth |
| CN105239569A (en) * | 2015-09-24 | 2016-01-13 | 河海大学 | Multi-section jointed recoverable screw enlarging-head anchor rod structure and construction method thereof |
| CN109113077A (en) * | 2018-10-17 | 2019-01-01 | 李慧 | A kind of cunicular foundation pit supporting construction of foundation pit side-wall |
| CN110230316A (en) * | 2019-06-13 | 2019-09-13 | 黄河交通学院 | A kind of civil engineering foundation pit support device |
| CN211143081U (en) * | 2019-09-20 | 2020-07-31 | 岳连成 | Subway deep basal pit supporting construction |
| CN211898446U (en) * | 2019-12-23 | 2020-11-10 | 殷雪英 | Hydraulic engineering side slope construction protective structure |
| CN111794247A (en) * | 2020-07-28 | 2020-10-20 | 广东万信建设工程科技有限公司 | Foundation pit supporting structure and construction method thereof |
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