CN114575352B - Foundation pit supporting device and construction method thereof - Google Patents

Foundation pit supporting device and construction method thereof Download PDF

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Publication number
CN114575352B
CN114575352B CN202210208864.7A CN202210208864A CN114575352B CN 114575352 B CN114575352 B CN 114575352B CN 202210208864 A CN202210208864 A CN 202210208864A CN 114575352 B CN114575352 B CN 114575352B
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support
foundation pit
supporting
unit
movable platform
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CN114575352A (en
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虞元林
孙涛
何合
詹正刚
杨飞
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Mcc Communication Construction Group Co ltd
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Mcc Communication Construction Group Co ltd
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (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)
  • Foundations (AREA)

Abstract

The invention discloses a foundation pit supporting device and a construction method thereof in the technical field of foundation construction, the device comprises a supporting unit, a supporting unit and a supporting unit, wherein the supporting unit comprises a first support and a second support which are positioned below, the first support and the second support are vertically connected in a sliding manner, the supporting unit also comprises a transverse base positioned above, the front end of the transverse base is provided with a top support, the top support is used for supporting on the outer plane of a foundation pit, and an alternate sliding unit is arranged between the rear end of the transverse base, the first support and the second support, and the alternate sliding unit enables the supporting unit to move along with the sliding support; and the supporting unit is connected with the front end of the alternate sliding unit and used for supporting the side wall of the foundation pit. Compared with the prior art, the method has the advantages that the support structure is not required to be disassembled and assembled back and forth in the continuous excavation process of the foundation pit, the excavation and the support propulsion are continuously carried out, and the construction efficiency is improved.

Description

Foundation pit supporting device and construction method thereof
Technical Field
The invention relates to the technical field of foundation construction, in particular to a foundation pit supporting device and a construction method thereof.
Background
The foundation pit is a soil pit excavated at a foundation design position according to the elevation of the substrate and the plane size of the foundation. Before excavation, the excavation scheme is determined according to geological hydrologic data and the conditions of buildings nearby the site, and waterproof and drainage works are performed. The method of releasing the slope can be used by the person with non-deep excavation to stabilize the soil slope, and the gradient of the soil slope is determined according to relevant construction regulations. The method can be used for protecting the wall of a foundation pit by a foundation pit wall supporting method and a concrete spraying wall protecting method, and even a large foundation pit adopts methods of underground continuous walls, column type bored piles and the like to be interlocked so as to protect the collapse of an outer soil layer; the underground water level can be reduced by using a well point method without influencing the nearby buildings, and slope-releasing open cut is adopted; natural cold air freezing method can be adopted for excavation in cold areas, etc.
In the foundation construction process, excavation of the foundation pit is needed, when the foundation pit is excavated on a certain soil with loose soil, supporting operation is synchronously carried out on the foundation pit after a certain depth is excavated, so that the problem of collapse of the foundation pit is avoided, but the existing supporting structure is integrally formed and installed, when the position of the supporting structure is required to be synchronously adjusted according to the excavation depth of the foundation pit, the supporting structure is required to be detached, and after the foundation pit is excavated in a staged mode, the supporting structure is installed, so that the construction efficiency is reduced, when the foundation pit is excavated, the foundation pit lacks supporting, the problem of collapse is easy to occur, and therefore, the safety is reduced.
Disclosure of Invention
The invention aims to provide a foundation pit supporting device and a construction method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a foundation pit support device comprising:
the supporting unit comprises a first support and a second support which are positioned below, the first support and the second support are vertically connected in a sliding way, the supporting unit also comprises a transverse base positioned above, the front end of the transverse base is provided with a top support which is used for supporting on the outer plane of a foundation pit, an alternate sliding unit is arranged between the rear end of the transverse base and the first support and between the rear end of the transverse base and the second support,
alternating the sliding units so that the supporting units move along with the sliding support;
and the supporting unit is connected with the front end of the alternate sliding unit and used for supporting the side wall of the foundation pit.
Further, the alternating sliding unit comprises vertical telescopic rods which are respectively connected to the rear end of the transverse base from the top ends of the first support and the second support, and vertical guide rods which are respectively fixedly connected from the top ends of the first support and the second support,
the guide rods of the first support and the second support penetrate through the movable platform, a set of magnetic attraction structure is arranged on the movable platform corresponding to the guide rods of the first support and the second support respectively, and the guide rods of the first support and the second support are adsorbed or separated from the movable platform through the power-on and power-off control of the magnetic attraction structure.
Further, each set of magnetic attraction structure comprises a magnetic attraction cylinder, the magnetic attraction cylinders are embedded in holes of the guide rods penetrating through the movable platform, the guide rods are made of iron materials, and magnetic attraction coils connected with a power supply are arranged in the magnetic attraction cylinders.
Further, a guide sleeve is arranged at the position of the guide rod penetrating through the movable platform, and the magnetic suction cylinder is sleeved on the periphery of the guide sleeve.
Further, the supporting unit is connected to the front end of the movable platform.
Further, the support unit comprises a plurality of fixed supporting rods fixedly connected with the front end of the movable platform, the front ends of the fixed supporting rods are fixedly connected with mounting supports, the front ends of the mounting supports are connected with concave frames, folding protection supporting rods are arranged on the inner sides of the concave frames, and the top ends of the concave frames are connected with the top ends of the folding protection supporting rods through linear pushing mechanisms.
Further, the pushing mechanism and the telescopic rod are one of an electric push rod, a hydraulic cylinder and an air cylinder.
Further, the first support and the second support are trapezoid plates with narrow upper parts and wide lower parts, and the bottoms of the first support and the second support are fixedly connected with supporting plates.
Further, the bottom end of the concave frame is rotationally connected with the mounting support through a rotating shaft, and the rotating angle of the concave frame is limited through a limiting block.
The construction method of the foundation pit supporting device adopts the foundation pit supporting device, and comprises the following steps:
the first support is contacted with the bottom of the upper foundation pit, and the supporting unit is abutted with the side wall of the foundation pit, so that a supporting effect is formed;
after the bottom of the lower foundation pit is excavated downwards to form, the first support keeps contact with the bottom of the upper foundation pit, the magnetic suction cylinder of the second support is electrified, the magnetic suction cylinder of the first support is powered off, and the second support slides downwards, so that the movable platform slides downwards along with the second support;
the folding protection support rod is pulled by the pushing mechanism to extend upwards along the concave frame, so that synchronous support of the side wall of the foundation pit is realized.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, each supporting structure component is sequentially installed and combined, the first support and the second support are adjusted to be distributed at staggered positions, one of the first support and the second support is enabled to be in contact with the bottom of the foundation pit, the supporting unit is enabled to be in contact with the surface of the foundation pit, a supporting effect is formed, when the foundation pit is continuously excavated downwards, a place around the support is reserved in advance, after the rest places are excavated, the first support is driven to slide downwards along the second support through the telescopic rod until the first support is enabled to be in contact with the re-excavated foundation pit, the supporting effect of the second support is replaced, when the first support moves downwards, the magnetic suction cylinders on the corresponding guide rods are controlled to work, so that the movable boss moves downwards in synchronization with the first support, the supporting structure is not required to be detached back and forth in the continuous process of excavation and supporting, and construction efficiency is improved.
Drawings
FIG. 1 is a schematic view of a foundation pit supporting device according to an embodiment of the present invention;
FIG. 2 is a schematic view of an alternate sliding unit according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the structure A in FIG. 2 according to the present invention;
fig. 4 is a schematic structural diagram of a support unit according to an embodiment of the invention.
In the figure: 100. a supporting unit; 101. a first support; 102. a second support; 103. a supporting plate; 104. a telescopic rod; 105. a hydraulic control mechanism; 106. a transverse base; 107. a concrete support; 200. an alternate sliding unit; 201. a guide rod; 202. mounting a support plate; 203. a movable boss; 204. a guide sleeve; 205. a magnetic suction tube; 206. a controller; 300. a supporting unit; 301. fixing the support rod; 302. a mounting support; 303. a concave frame; 304. an adjusting shaft; 305. folding the protective support rod; 306. an adjusting rod; 307. and a pushing mechanism.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First embodiment
As shown in fig. 1 to 3, the foundation pit supporting device of the present embodiment includes a supporting unit 100, an alternating sliding unit 200, and a supporting unit 300, wherein the supporting unit 100 includes a first support 101 and a second support 102 located below, the first support 101 and the second support 102 are slidably connected, and preferably, the first support 101 and the second support 102 are trapezoidal plates with narrow upper part and wide lower part, and the bottoms of the first support 101 and the second support 102 are fixedly connected with a supporting plate 103, so that the contact between the supports and the foundation pit bottom is stable. The sliding connection may be that a vertical chute is arranged on the side surface of the first support 101, and a protrusion embedded in the chute is arranged on the side surface of the second support 102, so that the first support 101 is in sliding connection with the second support 102.
The support unit 100 further comprises a horizontal cross base 106 located above, and a top support 107 is provided at the front end of the cross base 106, and the top support 107 is used for supporting on the outer plane of the foundation pit. An alternate sliding unit 200 is provided between the rear end of the traverse base 106 and the first and second holders 101 and 102. Specifically, the alternate slide unit 200 includes a vertical telescopic rod 104 connected from the top end of the first support 101 to the rear end of the lateral base 106, and a vertical telescopic rod 104 connected from the top end of the second support 102 to the rear end of the lateral base 106. The telescopic rod may be, for example, a hydraulic rod. The first support 101 or the second support 102 can be pushed to move up and down by the extension and retraction of the extension rod. The alternate sliding unit 200 may further include a mounting support plate 202 fixedly disposed at the top ends of the first support 101 and the second support 102, and vertical guide rods 201 are fixedly inserted into the mounting support plates 202.
The guide rods 201 of the first support 101 and the second support 102 are movably sleeved with a movable platform 203, that is, the guide rods 201 inserted in the first support 101 and the second support 102 movably penetrate through the movable platform 203, and the movable platform 203 is provided with two sets of magnetic structures. Each set of magnetic structure is composed of a magnetic cylinder 205 and a guide sleeve 204, the guide sleeve 204 is sleeved on the guide rod 201, the magnetic cylinder 205 is embedded in the movable platform 203, and the magnetic cylinder 205 surrounds the periphery of the guide sleeve 204. The magnetic attraction structures of the guide rods 201 of the first support 101 and the second support 102 can be controlled respectively, the movable platform 203 is provided with a controller 206, and the controller 206 is electrically connected with the magnetic attraction structures respectively.
A magnetic coil is arranged in the magnetic suction barrel 205, and the magnetic suction barrel 205 is powered by an external power supply. The guide rod 201 is made of iron material, and the top end of the guide rod 201 is not in contact with the lateral base 106. By energizing the magnetic suction tube 205, the magnetic suction tube 205 can be made to have magnetic attraction, so that the magnetic suction tube 205 and the guide rod 201 are attracted and follow.
The supporting unit 300 extends from the movable platform 203 to support the side wall of the foundation pit.
In initial use, the first support 101 and the second support 102 may be supported together at the bottom of the foundation pit, and the support unit 300 may be supported on the side wall of the foundation pit. When the foundation pit continues to excavate downwards, places around the supporting supports are reserved in advance, for example, the periphery of the second support 102 is reserved, other areas of the foundation pit are excavated downwards, after the excavation is completed, the first support 101 is driven to slide downwards along the second support 102 through the telescopic rod 104, the guide rod 201 on the first support 101 also moves downwards along with the second support 102 in the sliding process, and by enabling the magnetic suction cylinder 205 on the first support 101 to be electrified, the magnetic suction cylinder 205 adsorbs the guide sleeve 204 of the guide rod 201, so that the movable platform 203 moves downwards along with the guide rod 201 of the first support 101. Moreover, since the magnetic suction tube 205 on the second support 102 is not electrified and does not have an adsorption effect on the guide rod on the second support 102, the movable platform 203 can slide downwards along the guide rod on the second support 102, and the first support 101 moves downwards until contacting with the bottom of the re-excavated foundation pit, so as to take over the supporting effect of the second support 102. By alternately moving the first support 101 and the second support 102 downwards, the support structure does not need to be disassembled and assembled back and forth in the continuous excavation process of the foundation pit, and the excavation and support are continuously carried out.
Second embodiment
The second embodiment includes the whole contents of the first embodiment and further includes a preferred structure of the supporting unit on the basis thereof, and the same description as the first embodiment is omitted herein. As shown in fig. 4, the support unit 300 includes a plurality of fixing struts 301 fixedly connected to the movable boss 203 and linearly arranged, the front ends of the fixing struts 301 are fixedly connected to the mounting support 302, and the bottom ends of the concave frames 303 are rotatably connected to the mounting support 302 through a rotation shaft.
The inboard of concave frame 303 is equipped with folding protection branch 305, folding protection branch 305 top is connected with adjusting the pole 306, concave frame 303 top is equipped with the push mechanism 307 of being connected with adjusting the pole 306, push mechanism 307 can be electric putter, hydraulic stem, cylinder pole etc. in the replacement process of first support 101 and second support 102, along with the increase of foundation ditch excavation depth, upwards extend along concave frame 303 through adjusting pole 306 pulling folding protection branch 305, satisfy the synchronous support to the foundation ditch lateral wall, and concave frame 303 forms the triangle distribution structure with first support 101, second support 102.
Further, an adjusting shaft 304 is arranged at one end of the mounting support 302, the adjusting shaft 304 is connected with a rotating shaft connected with the concave frame 303, a limiting block is arranged on the adjusting shaft 304, and the rotating angle of the concave frame is limited by the limiting block.
The invention also provides a construction method of the foundation pit supporting device, which comprises the following steps,
s1: at least one of the first support 101 and the second support 102 is contacted with the bottom of the foundation pit, and the supporting unit 300 is abutted with the side wall of the foundation pit, so that a supporting effect is formed;
s2, performing S2; when the foundation pit is continuously excavated downwards, a place around a supporting seat is reserved in advance, after the rest places are excavated, the first seat 101 is driven to slide downwards along the second seat 102 through the telescopic rod 104, and when the first seat 101 moves downwards, the magnetic suction cylinder 205 on the guide rod 201 of the first seat is controlled to work, so that the movable boss 203 synchronously moves downwards of the first seat 101, the guide rod 201 on the other side slides on the movable boss 203, the second seat 102 does not change the position until the first seat contacts with the bottom of the re-excavated foundation pit, the supporting effect of the second seat 102 is replaced, and then the replacement of the first seat 101 and the second seat 102 is completed, so that the supporting structure does not need to be detached and installed back and forth in the continuous excavation process of the foundation pit, and the excavation and supporting propulsion are continuously carried out;
s3: in the replacement process of the first support 101 and the second support 102, as the excavation depth of the foundation pit increases, the folding protection support rods 305 are pulled by the adjusting rods 306 to extend upwards along the concave frames 303, so that synchronous support of the foundation pit is met.
Standard parts used in the invention can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the details are not described.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a foundation ditch strutting arrangement which characterized in that: comprising the steps of (a) a step of,
the supporting unit (100) comprises a first support (101) and a second support (102) which are positioned below, the first support (101) is in vertical sliding connection with the second support (102), the supporting unit (100) further comprises a transverse base (106) positioned above, the front end of the transverse base (106) is provided with a top support, the top support is used for supporting on the outer plane of a foundation pit, an alternate sliding unit (200) is arranged between the rear end of the transverse base (106) and the first support (101) and the second support (102),
-alternating the sliding units (200) such that the support units (300) follow the sliding support movement;
a supporting unit (300) connected to the front end of the alternate sliding unit (200) for supporting the side wall of the foundation pit,
the alternating sliding unit (200) comprises vertical telescopic rods (104) which are respectively connected to the rear ends of the transverse base (106) from the top ends of the first support (101) and the second support (102), and vertical guide rods (201) which are respectively fixedly connected from the top ends of the first support (101) and the second support (102),
the guide rods (201) of the first support (101) and the second support (102) penetrate through the movable platform, a set of magnetic attraction structure is respectively arranged on the movable platform corresponding to the guide rods (201) of the first support (101) and the second support (102), the guide rods (201) of the first support (101) and the second support (102) are adsorbed or separated from the movable platform by the power-on and power-off control of the magnetic attraction structure,
the supporting unit (300) is connected to the front end of the movable platform,
the supporting unit (300) comprises a plurality of fixed supporting rods (301) fixedly connected with the front end of the movable platform, the front end of each fixed supporting rod (301) is fixedly connected with a mounting support (302), the front end of each mounting support (302) is connected with a concave frame (303), a folding protection supporting rod (305) is arranged on the inner side of each concave frame (303), and the top end of each concave frame (303) is connected with the top end of each folding protection supporting rod (305) through a linear pushing mechanism (307).
2. The foundation pit supporting device of claim 1, wherein: each set of magnetic attraction structure comprises a magnetic attraction cylinder (205), the magnetic attraction cylinders (205) are embedded in holes, penetrating through the movable platform, of the guide rods (201) made of iron materials, and magnetic attraction coils connected with a power supply are arranged in the magnetic attraction cylinders (205).
3. The foundation pit supporting device of claim 2, wherein: the guide rod (201) penetrates through the movable platform, a guide sleeve (204) is arranged at the position, and the magnetic suction tube (205) is sleeved on the periphery of the guide sleeve (204).
4. The foundation pit supporting device of claim 1, wherein: the linear pushing mechanism (307) and the telescopic rod (104) are one of an electric push rod, a hydraulic cylinder and an air cylinder.
5. The foundation pit supporting device of claim 1, wherein: the first support (101) and the second support (102) are trapezoid plates with narrow upper parts and wide lower parts, and the bottoms of the first support (101) and the second support (102) are fixedly connected with supporting plates (103).
6. The foundation pit supporting device of claim 1, wherein: the bottom end of the concave frame (303) is rotationally connected with the mounting support (302) through a rotating shaft, and the rotating angle of the concave frame (303) is limited through a limiting block.
7. The construction method of the foundation pit supporting device is characterized by comprising the following steps of: the foundation pit supporting device according to any one of claims 1 to 6, comprising the steps of:
the first support (101) is contacted with the bottom of the upper foundation pit, and the supporting unit (300) is abutted with the side wall of the foundation pit, so that a supporting effect is formed;
after the bottom of the lower foundation pit is excavated downwards to form, the first support (101) is kept in contact with the bottom of the upper foundation pit, the magnetic suction cylinder (205) of the second support (102) is electrified, the magnetic suction cylinder (205) of the first support is powered off, and the second support slides downwards, so that the movable platform slides downwards along with the second support (102);
the folding protection support rod (305) is pulled by the linear pushing mechanism (307) to extend upwards along the concave frame (303), so that synchronous support of the side wall of the foundation pit is realized.
CN202210208864.7A 2022-03-03 2022-03-03 Foundation pit supporting device and construction method thereof Active CN114575352B (en)

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CN115162748A (en) * 2022-06-15 2022-10-11 中建一局集团第三建筑有限公司 Jacking equipment for steel net rack for airport
CN115506384B (en) * 2022-11-23 2023-03-17 成都理工大学 Quick layering device for ice water accumulation layer

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US3159977A (en) * 1960-05-27 1964-12-08 Lillo Joseph De Suspended earth-shoring device
FR1281130A (en) * 1961-02-22 1962-01-08 Suspended earth shoring system
DE2816709C2 (en) * 1978-04-18 1985-01-03 Josef 5138 Heinsberg Krings Shoring device for multi-level shoring
JP2000303469A (en) * 1997-07-09 2000-10-31 Nippon Supiide Shiyoa Kk Slide panel earth retaining support
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