CN109898522B

CN109898522B - Foundation pit support frame

Info

Publication number: CN109898522B
Application number: CN201910300377.1A
Authority: CN
Inventors: 喻文远; 周代荣; 陈林
Original assignee: Individual
Current assignee: Shanghai Licheng Construction Engineering Co.,Ltd.
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2021-08-20
Anticipated expiration: 2039-04-15
Also published as: CN109898522A; CN113529737A; CN113529736A

Abstract

The invention provides a foundation pit supporting frame and relates to the technical field of buildings. This foundation ditch support frame includes: the foundation pit bottom plate is arranged at the bottom of the foundation pit; the supporting piece is arranged in the foundation pit and used for supporting the rock-soil layer, the supporting piece is positioned in the circumferential direction of the foundation pit bottom plate, the supporting piece is cuboid and is constructed to be provided with a cavity, and the bottom end of the supporting piece is lower than the foundation pit bottom plate; the enclosing purlin beam is used for supporting two opposite supporting pieces, and is arranged at the upper parts of the supporting pieces and is respectively connected with the two opposite supporting pieces; and the drainage piece is arranged in the rock-soil layer, at least part of the drainage piece extends into the cavity, and the drainage piece is used for draining water in the rock-soil layer into the cavity. The foundation pit supporting frame is reasonable in structure and good in drainage effect, and can effectively avoid collapse of the foundation pit retaining wall.

Description

Foundation pit support frame

Technical Field

The invention relates to the technical field of buildings, in particular to a foundation pit supporting frame.

Background

The foundation pit support is designed to meet the requirements of stability and deformation as a structural system by adopting support bars, reinforcement and protection measures on the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.

In the related technology, when a deep foundation pit is excavated in an area with a high underground water level, a soil aquifer is cut off, underground water can continuously seep into the foundation pit, and the drainage is not timely, so that sand running, slope instability or foundation bearing capacity reduction is easily caused, and even foundation pit retaining wall collapse is caused.

Disclosure of Invention

The invention aims to provide a foundation pit supporting frame which solves the problems of quicksand, slope instability or foundation bearing capacity reduction caused by water seepage of a foundation pit retaining wall.

The embodiment of the invention is realized by the following steps: a foundation pit support frame comprising:

the foundation pit bottom plate is arranged at the bottom of the foundation pit;

the supporting piece is arranged in the foundation pit and used for supporting the rock-soil layer, the supporting piece is located in the circumferential direction of the foundation pit bottom plate, the supporting piece is cuboid and is constructed to be provided with a cavity, and the bottom end of the supporting piece is lower than the foundation pit bottom plate;

the enclosing purlin beam is used for supporting the two opposite supporting pieces, is arranged at the upper parts of the supporting pieces and is respectively connected with the two opposite supporting pieces; and

the drainage piece, this drainage piece set up in the ground in situ just at least part of drainage piece stretches into in the cavity, drainage piece is used for with the intraformational water drainage of ground extremely in the cavity.

Optionally, the drainage member is inclined relative to the support member, and one end of the drainage member, which extends into the cavity, extends towards the bottom of the foundation pit;

the drainage member is hollow tubular structure, the periphery wall of drainage member is provided with the gap of intaking rather than inside intercommunication, and this gap of intaking forms the periphery wall part towards the foundation ditch top of drainage member.

Optionally, the foundation pit bracing frame further includes:

and one end of the supporting structure is connected with the foundation pit bottom plate, and the other end of the supporting structure is connected with the inner side wall of the supporting piece.

Optionally, the support structure comprises:

the sliding block is slidably arranged on the inner side wall of the supporting part and can be positioned relative to the inner side wall of the supporting part, and the sliding block is used for moving up and down along the height direction of the supporting part; and

the one end of extensible member with the foundation ditch bottom plate is articulated, the other end of extensible member with the slider is articulated.

Optionally, the telescoping member comprises:

the sleeve is of a hollow structure with one open end, internal threads are arranged in the sleeve, and one end of the sleeve, which is far away from the open end, is hinged to the foundation pit bottom plate; and

and one end of the connecting screw rod extends into the sleeve from the opening and is in threaded connection with the sleeve, and the other end of the connecting screw rod is hinged with the sliding block.

Optionally, the foundation ditch support frame still includes location structure, location structure includes:

the first groove is arranged on the inner side wall of the support piece and is used for being in sliding connection with the sliding block;

the second grooves are arranged on two sides of the first groove and extend along the same direction with the first groove;

the middle part is positioned between the first groove and the second groove, and a rectangular through hole is formed in the inner side wall of the middle part and is respectively communicated with the first groove and the second groove; and

a threaded fastener extending at least partially through the intermediate portion and toward the first recess, the threaded section of the threaded fastener being threadably connected to the side wall of the slider.

Optionally, the foundation pit bracing frame further includes:

and one end of the prestressed anchor rod is connected with the support piece, and the other end of the prestressed anchor rod extends into the rock-soil layer.

Optionally, one side of the support member close to the rock-soil layer is provided with a protrusion portion, and the protrusion portion is rectangular and is arranged on the support member at intervals.

Optionally, the foundation pit bracing frame further includes:

and at least part of the fixed block is fixedly arranged in the foundation pit bottom plate, and one end of the sleeve is hinged with the fixed block.

Optionally, the support member is welded from a plurality of steel plates.

The embodiment of the invention has the beneficial effects that: this foundation ditch support frame's is rational in infrastructure, and the practicality is strong, and it is through the drainage piece with the intraformational water drainage of ground to the support piece that has the cavity in, during avoiding the water infiltration foundation ditch in the ground layer to avoid because of the quicksand that the infiltration caused, slope unstability or ground bearing capacity decline, in addition, the water after the drainage directly gets into the interior centralized processing of being convenient for of support piece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a foundation pit support provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a partial structure of a first groove and a slider according to an embodiment of the present invention;

FIG. 3 is a schematic view of a positioning structure and a slider according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

fig. 5 is a schematic structural view of a drainage member according to an embodiment of the present invention.

Icon: 100-foundation pit; 110-a support; 111-a cavity; 112-bottom end; 113-an inner side wall; 120-foundation pit bottom plate; 130-a support beam; 140-a drainage member; 141-water inlet gap; 150-prestressed anchor; 160-a boss; 170-enclosing a purlin beam; 180-fixed block; 190-cannula; 200-connecting screw; 210-a slider; 220-a threaded fastener; 1131 — first groove; 1132 — a second groove; 1133-middle section; 11331-through holes; 11311 — first groove sidewalls.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Referring to fig. 1, an embodiment of the present invention provides a foundation pit supporting frame, which includes a foundation pit bottom plate 120, a supporting member 110, a purlin beam 170, and a drainage member 140.

Specifically, the shape of the foundation pit floor 120 is adapted to the shape of the foundation pit 100, and the shape of the foundation pit 100 is generally rectangular.

Referring to fig. 1, in the embodiment, the supporting member 110 is formed by welding a plurality of steel plates, and the supporting member 110 is formed in a rectangular parallelepiped shape, and the cavity 111 is formed inside the supporting member 110, so that the shape of the cavity 111 is also rectangular, the supporting member 110 is disposed in the foundation pit 100 and supports the rock-soil layer, the supporting member 110 is located in the circumferential direction of the foundation pit bottom plate 120, taking the shape of the foundation pit 100 as a rectangle as an example, the number of the supporting members 110 is four, that is, the four supporting members 110 are distributed in the circumferential direction of the rectangular foundation pit bottom plate 120, and the bottom end 112 of the supporting member 110 is lower than the foundation pit bottom plate 120, and since the supporting member 110 is inserted into the bottom of the foundation pit 100, the supporting strength of the supporting member 110 is high.

Referring to fig. 1, in the embodiment, the purlin enclosing beam 170 is used for supporting two opposite supporting members 110, that is, the purlin enclosing beam 170 is disposed between every two opposite supporting members 110, the purlin enclosing beam 170 is disposed on the upper portions of the supporting members 110 and is connected to the two opposite supporting members 110 through the supporting beam 130, the supporting beam 130 may be formed by pouring reinforced concrete, and in addition, the supporting beam 130 and the purlin enclosing beam 170 may be welded or bolted by using section steel.

Referring to fig. 1, drainage piece 140 sets up in the ground bed and drainage piece 140's at least part stretches into cavity 111, and this drainage piece 140 is arranged in with the intraformational water drainage of ground bed to cavity 111 in to effectively avoided the water infiltration foundation ditch 100 on ground bed, simultaneously, in the water entering support piece 110 of drainage piece 140 drainage, be convenient for carry out centralized processing to the water after the drainage, during actual processing, accessible water pump will be located the inside water of support piece 110 and outwards discharge.

Referring to fig. 1, the drainage member 140 is further obliquely disposed relative to the support member 110, and one end of the drainage member 140 extending into the cavity 111 extends toward the bottom of the foundation pit 100, so that water entering the drainage member 140 directly enters the interior of the support member 110.

Referring to fig. 1 and 2, in particular, the drainage member 140 is a hollow tubular structure, and the outer peripheral wall of the drainage member 140 is provided with a water inlet slit 141 communicated with the inside thereof, the water inlet slit 141 is formed at an outer peripheral wall portion of the drainage member 140 facing the upper side of the foundation pit 100, the water inlet slit 141 can prevent the gravel from entering the drainage member 140, and the drainage member 140 is prevented from being blocked, in this embodiment, the drainage member 140 may employ a rectangular pipe, one end opening of the drainage member 140 extending into the rock soil layer is closed and one end opening located in the support member 110 is made, so that the gravel and the like can be prevented from entering the drainage member 140, and the water inlet slit 141 is disposed at the top side of the drainage member 140, wherein the number of the water inlet slits 141 may be plural, and the plural slits are disposed in parallel at the top side of the drainage member 140, and the water inlet slit 141 may be processed by a wire cutter.

In other embodiments, the drain member 140 may be a circular pipe, and the water inlet slit 141 may be formed on the outer circumferential wall of the circular pipe.

In this embodiment, the foundation pit support frame further comprises a support structure.

Referring to fig. 1 and 3, the supporting structure is used to reinforce the support of the supporting member, one end of the supporting structure is connected to the foundation pit bottom plate 120, the other end of the supporting structure is connected to the inner sidewall 113 of the supporting member 110, and the supporting structure includes a slider 210 and a telescopic member.

The length of the telescopic member is adjustable, the slider 210 is slidably disposed on the inner sidewall 113 of the support member 110 and can be fixed relative to the inner sidewall 113 of the support member 110, the slider 210 moves up and down along the height direction of the support member 110, one end of the telescopic member is hinged to the foundation pit bottom plate 120, and the other end of the telescopic member is hinged to the slider 210.

Threaded holes are formed in two side walls of the sliding block 210.

Referring to fig. 1, in particular, the telescoping member includes a sleeve 190 and a connecting screw 200.

Sleeve pipe 190 is one end open-ended hollow structure, and this open end and sleeve pipe 190's inside intercommunication, be provided with the internal thread in the sleeve pipe 190, the one end of keeping away from the open end of sleeve pipe 190 articulates in foundation ditch bottom plate 120, connecting screw 200's one end stretch into sleeve pipe 190 by this opening and with sleeve pipe 190 threaded connection, connecting screw 200's the other end is articulated with slider 210, and like this, this bearing structure and foundation ditch bottom plate 120, support piece 110 form triangle-shaped, effectively strengthened the support to support piece 110, and simultaneously, also avoid occupying the too big problem in space in foundation ditch 100 middle part.

In addition, for the foundation pits 100 with different depths, the angle of the expansion piece relative to the inner side wall 113 of the support piece 110 can be adjusted, so that the support structure is suitable for the foundation pits 100 with different depths.

Referring to fig. 3, in this embodiment, in order to position the slider 210, the foundation pit supporting frame further includes a positioning structure, wherein the positioning structure includes a first groove 1131 disposed on the inner sidewall 113 of the supporting member 110, a second groove 1132 disposed at two sides of the first groove 1131, an intermediate portion 1133 located between the first groove 1131 and the second groove 1132, and a threaded fastener 220.

Referring to fig. 3, 4 and 5, the first groove 1131 extends along the height direction of the support 110, the first groove 1131 is a rectangular groove, the first groove 1131 is slidably connected to the slider 210, and the side wall 11311 of the first groove is L-shaped, so as to limit the slider 210 and improve the structural stability thereof; the second groove 1132 also extends along the height direction of the supporting member 110, the second groove 1132 is also a rectangular groove, and between the depth of the second groove 1132 and the depth of the first groove 1131, the two sides of the first groove 1131 are both provided with the second groove 1132, the inner side wall 113 of the middle part 1133 is provided with a rectangular through hole 11331, the rectangular through hole 11331 is respectively communicated with the first groove 1131 and the second groove 1132, thus, the threaded fastener 220 enters from the second groove 1132 and passes through the rectangular through hole 11331, so that the threaded section of the threaded fastener 220 can be in threaded connection with the threaded hole of the slider 210, when the slider 210 moves to a preset position, the slider 210 can be positioned by the threaded fastener 220, the adjusting mode is convenient, and the positioning effect is good. It should be noted that the threaded fastener 220 may be a bolt.

Referring to fig. 1, in this embodiment, the foundation pit supporting frame further includes a pre-stressed anchor 150, one end of the pre-stressed anchor 150 is connected to the supporting member 110, and the other end of the pre-stressed anchor 150 extends into the rock-soil layer.

Referring to fig. 1, in this embodiment, a protruding portion 160 is disposed on one side of the support 110 close to the rock-soil layer, the protruding portion 160 is rectangular and disposed on the support 110 at intervals, the protruding portion 160 is formed by pouring reinforced concrete, one or more protruding portions may be selectively disposed in the height direction of the retaining wall of the foundation pit 100 according to the specific depth of the foundation pit 100, during specific implementation, a hole may be formed in the retaining wall of the foundation pit 100, a reinforcement frame is welded to the support 110, the support 110 and the reinforcement frame are then installed in the foundation pit 100, meanwhile, a reserved hole is formed in the support 110 so as to pour the hole in the retaining wall of the foundation pit 100 through the reserved hole, and the protruding portion 160 can prevent the rock-soil layer from being unstable, thereby enhancing the stability of the foundation pit 100.

Referring to fig. 1, in this embodiment, the foundation pit supporting frame further includes a fixing block 180, at least a portion of the fixing block 180 is fixedly disposed in the foundation pit bottom plate 120, the fixing block 180 may be fixed to the foundation pit bottom plate 120 by welding, one end of the sleeve 190 is hinged to the fixing block 180, and in addition, the fixing block 180 may be further connected to the foundation pit bottom plate 120 by a bolt through a thread.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A foundation pit support frame, its characterized in that includes:

the drainage piece is arranged in the rock-soil layer, at least part of the drainage piece extends into the cavity, and the drainage piece is used for draining water in the rock-soil layer into the cavity;

the drainage piece is inclined relative to the support piece, and one end, extending into the cavity, of the drainage piece extends towards the bottom of the foundation pit;

the drainage member is of a hollow tubular structure, the outer peripheral wall of the drainage member is provided with a water inlet gap communicated with the interior of the drainage member, and the water inlet gap is formed in the outer peripheral wall part of the drainage member facing the upper part of the foundation pit;

the foundation ditch support frame still includes:

one end of the supporting structure is connected with the foundation pit bottom plate, and the other end of the supporting structure is connected with the inner side wall of the supporting piece;

the support structure includes:

one end of the telescopic piece is hinged with the foundation pit bottom plate, and the other end of the telescopic piece is hinged with the sliding block;

the extensible member includes:

2. The foundation pit support frame of claim 1, wherein the foundation pit support frame further comprises a positioning structure, the positioning structure comprising:

3. The foundation pit support frame of claim 1, wherein the foundation pit support frame further comprises:

4. The foundation pit support frame according to claim 1, wherein one side of the support member close to the rock-soil layer is provided with a protrusion part which is rectangular and is arranged on the support member at intervals.

5. The foundation pit support frame of claim 1, wherein the foundation pit support frame further comprises:

6. The foundation pit support frame of any one of claims 1-5, wherein the support member is formed by welding a plurality of steel plates.