CN218933146U - Karst area foundation pit maintenance structure - Google Patents
Karst area foundation pit maintenance structure Download PDFInfo
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- CN218933146U CN218933146U CN202320023458.3U CN202320023458U CN218933146U CN 218933146 U CN218933146 U CN 218933146U CN 202320023458 U CN202320023458 U CN 202320023458U CN 218933146 U CN218933146 U CN 218933146U
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Abstract
The utility model discloses a karst area foundation pit maintenance structure, which comprises a base, a support frame and a support plate; the base is poured at the bottom of the foundation pit; the support frame comprises a transverse support rod, a longitudinal support rod, an inclined support rod and a horizontal support rod, wherein the longitudinal support rod is arranged on the base close to the side wall of the foundation pit, and the horizontal support rod is arranged between the two longitudinal support rod brackets and is connected with the longitudinal support rod through a first connecting piece; two ends of the transverse supporting rod are connected with the longitudinal supporting rod and a base far away from one side of the side wall of the foundation pit through second connecting pieces; the two ends of the diagonal brace are connected with the longitudinal support rod and the base through third connecting pieces; the supporting plate is arranged on the outer side of the longitudinal supporting rod and is matched with the side wall of the foundation pit for use; this maintenance structure can dismantle the connection through setting up each structure, can carry out quick support to the unexpected geology condition that appears in the karst area foundation ditch excavation process, avoids the local collapse and the toppling of foundation ditch lateral wall, has that the work progress is simple and convenient, engineering cost is low, use nimble characteristics.
Description
Technical Field
The utility model belongs to the technical field of foundation pit support, and particularly relates to a foundation pit maintenance structure in a karst area.
Background
The Chinese amplitude player is wide, the geological landform environment is complex, and the karst landform forms a plurality of threats to human production and life; in recent years, the number of subways and building constructions is increased, and the situation of encountering a karst cave which is a special geology in the subway construction process of a southern city in China is frequent; in the subway line construction or foundation pit construction process, underground karst cave has the risk of causing disasters such as gushing water (mud), karst falling and the like, endangering the safety of ground roadbeds, buildings and underground engineering structures, and seriously affecting the success and safety of engineering construction;
therefore, the elimination of karst damage in a subway line or a foundation pit before construction is a necessary work for avoiding major geological hidden trouble and ensuring the construction safety of a subway tunnel; and in karst areas, when the rock stratum degree of depth is not far away from the excavation degree of depth or the foundation ditch degree of depth is great, prevent that foundation ditch bottom and lateral wall from gushing water and being the first big thing of foundation ditch safety construction, and the dismembering effect that the foundation ditch lateral wall gushed and produced is the foundation ditch collapse, and the main technical means who solves this problem adoption at present sets up the stirring stake in foundation ditch lateral wall position before the excavation, forms individual layer or double-deck pile structure, supports the foundation ditch lateral wall in the excavation process, and although the pile has fine supporting role, can effectively prevent gushing water and the overturning problem of lava foundation ditch lateral wall, nevertheless still has following problem:
(1) The row piles are mainly made of cement piles or concrete piles, so that the side wall of a foundation pit with a large area can be supported, and the foundation pit can not be effectively supported in a differentiation manner according to local sudden geological conditions such as soil holes, karst caves, limestone and the like in the foundation pit excavation process, and the side wall of the foundation pit is easy to be partially overturned and collapsed;
(2) Meanwhile, the row piles are of a disposable supporting structure and cannot move, so that a method for supporting the row piles in a targeted manner according to the excavation condition of the foundation pit on site is realized, and collapse of the side wall of the foundation pit is easy to cause;
therefore, there is a need to design a karst area foundation pit maintenance structure, which can flexibly and rapidly support unexpected geological conditions occurring in the process of excavating the foundation pit in the karst area, so as to solve the problems, improve the flexibility of side wall support in the process of excavating the foundation pit and save the support cost.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a karst area foundation pit maintenance structure, which is characterized in that all structural members are detachably connected, all the members are common structural members in a construction site, and when the structure is used, the side wall of a foundation pit can be rapidly supported according to unexpected geological conditions in the process of excavating the foundation pit in the karst area, so that the side wall of the foundation pit is prevented from being partially collapsed and toppled, and the structure has the characteristics of simple and convenient construction process, low engineering cost and flexible use.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a karst area foundation pit maintenance structure comprises a base, a support frame and a support plate;
the base is poured at the bottom of the foundation pit in advance and is matched with the supporting frame for use;
the supporting frame comprises a transverse supporting rod, a longitudinal supporting rod, an inclined supporting rod and a horizontal supporting rod, wherein the longitudinal supporting rod is arranged on a base close to one side of the side wall of the foundation pit; the horizontal support rods are arranged between two adjacent longitudinal support rod brackets and are connected with the longitudinal support rods through first connecting pieces; the two ends of the transverse supporting rod are connected with the longitudinal supporting rod and the base far away from one side of the side wall of the foundation pit through second connecting pieces; the inclined stay bars are obliquely arranged, and two ends of the inclined stay bars are connected with the longitudinal support bars and the base through third connecting pieces;
the backup pad sets up in the outside of vertical bracing piece, uses with the foundation ditch lateral wall cooperation, and still has seted up a plurality of pressure release holes in the backup pad.
Preferably, the base comprises a supporting table, an auxiliary anti-pulling positioning pile and a main anti-pulling positioning pile, wherein the supporting table is in a round table structure, and a connecting sleeve is arranged on the supporting table and is matched with the longitudinal support for use; the auxiliary anti-pulling positioning pile and the main anti-pulling positioning pile are both arranged on the lower side of the supporting table, wherein the auxiliary anti-pulling positioning pile is symmetrically arranged on two sides of the main anti-pulling positioning pile, and limiting threads are arranged on the auxiliary anti-pulling positioning pile and the main anti-pulling positioning pile.
Preferably, the horizontal supporting rod is further provided with a plurality of supporting pieces, the supporting pieces are fixedly installed on the horizontal supporting rod, hydraulic parts are installed on the supporting pieces, and the end parts of piston rods of the hydraulic parts are matched with hinge seats arranged on the supporting plates.
Preferably, the supporting plate is also provided with an anchor piece, and the anchor piece is matched with the side wall of the foundation pit for use.
Preferably, a supporting connecting piece is further arranged between the two adjacent foundation pit maintenance structures, the supporting connecting piece comprises a connecting piece body, a transverse abdicating plate and a horizontal abdicating rod, clamping grooves are formed in two ends of the connecting piece body, and the clamping grooves are matched with the supporting plate for use; the horizontal plate of stepping down is installed in the inboard expansion tank of connecting piece body through a plurality of first reset springs, the lever setting of stepping down in the outside draw-in groove of connecting piece body, and is provided with the second reset spring in the outside draw-in groove of connecting piece body level, the lever is stepped down to the level and the cooperation of second reset spring is used.
The beneficial effects of the utility model are as follows: the utility model discloses a karst area foundation pit maintenance structure, which is improved compared with the prior art in that:
(1) The utility model designs a karst area foundation pit maintenance structure which comprises a base, a support frame and a support plate, wherein the foundation pit maintenance structure can rapidly support the side wall of a foundation pit in a construction process in a flexible manner in time under the unexpected geological condition of the foundation pit in the karst area by arranging the detachable connection installation mode of the base, the support frame and the support plate, so that the local collapse and the overturning of the side wall of the foundation pit are avoided; meanwhile, all parts of the foundation pit maintenance structure are common structural members on a construction site, and the foundation pit maintenance structure can be flexibly assembled according to the needs when in use, so that the construction cost is effectively saved, and the foundation pit maintenance structure has the advantages of simplicity and convenience in construction process and flexibility in use;
(2) According to the foundation pit maintenance structure, through the arrangement of the hydraulic part, the supporting angle of the supporting plate can be adjusted according to the deformation condition of the side wall of the foundation pit, so that the dynamic supporting of the side wall of the foundation pit is completed, the overturning angle of the side wall of the foundation pit is multiple, and the supporting is flexible;
(3) And can form continuous support to the foundation ditch lateral wall for the foundation ditch maintenance structure of being convenient for when using, still set up between two adjacent foundation ditch maintenance structures and support the connecting piece and carry out flexonics to two adjacent foundation ditch maintenance structures each other, come to cushion external pressure, avoid the device to receive the damage after the instantaneous external force, have the good and nimble advantage of use of security.
Drawings
Fig. 1 is a schematic structural view of a foundation pit maintenance structure according to the present utility model.
Fig. 2 is a view showing a state of use of the foundation pit maintenance structure of the present utility model.
Fig. 3 is a schematic structural view of the base of the present utility model.
Fig. 4 is a schematic structural view of the support plate of the present utility model.
Fig. 5 is a schematic structural view of the support member of the present utility model.
Fig. 6 is a top view of the support link of the present utility model.
Wherein: 1. base, 11, support table, 12, secondary anti-pull spud, 13, primary anti-pull spud, 14, adapter sleeve, 15, connector body, 16, transverse yield plate, 17, first return spring, 18, clamping groove, 19, horizontal yield rod, 2, transverse support rod, 20, second return spring, 3, diagonal support rod, 4, longitudinal support rod, 5, support plate, 51, hinge seat, 52, pressure relief hole, 53, anchor piece, 54, pin joint hole, 6, horizontal support rod, 7, support piece, 71, hydraulic part, 8, third connector, 9, second connector, 10.
Detailed Description
In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below with reference to the accompanying drawings and examples.
Example 1: 1-6, a karst area foundation pit maintenance structure comprises a base 1, a support frame and a support plate 5;
the base 1 is poured at the bottom of the foundation pit in advance and is used for installing and supporting the supporting frame;
the support frame comprises a transverse support rod 2, a longitudinal support rod 4, a horizontal support rod 6 and an inclined support rod 3, wherein the longitudinal support rod 4 is arranged on the base 1 close to one side of the side wall of a foundation pit, the horizontal support rod 6 is arranged between two adjacent longitudinal support rod 4 supports and is connected with the longitudinal support rod 4 through a first connecting piece 10, two ends of the transverse support rod 2 are connected with the longitudinal support rod 4 and the base 1 far away from one side of the side wall of the foundation pit through a second connecting piece 9 and are used for supporting the bottom of the longitudinal support rod 4, the bottom of the longitudinal support rod 4 is prevented from being deformed when external force is received, the inclined support rod 3 is obliquely arranged, two ends of the inclined support rod 3 are connected with the longitudinal support rod 4 and the base 1 through a third connecting piece 8 and are used for supporting the upper end of the longitudinal support rod 4, and the upper end of the longitudinal support rod 4 is prevented from being deformed;
the supporting plate 5 is arranged on the outer side of the longitudinal supporting rod 4 and is used for supporting the side wall of the foundation pit.
Preferably, for being convenient for with base 1 is fixed on the foundation ditch diapire, base 1 include supporting bench 11, vice anti-pulling spud 12 and main anti-pulling spud 13, supporting bench 11 is round platform structure, and is provided with adapter sleeve 14 and vertical bracing piece 4 cooperation on supporting bench 11 and use, vice anti-pulling spud 12 and main anti-pulling spud 13 all set up the downside at supporting bench 11, wherein vice anti-pulling spud 12 symmetry sets up in the both sides of main anti-pulling spud 13, and for being convenient for fix with the concrete of pouring and prevent to be pulled out vice anti-pulling spud 12 and main anti-pulling spud 13 on all be provided with spacing screw thread.
Preferably, the transverse support rod 2, the longitudinal support rod 4, the horizontal support rod 6 and the diagonal support rod 3 can be made of steel pipes commonly used in construction, and the first connecting piece 10, the second connecting piece 9 and the third connecting piece 8 are commonly used in a fastening structure.
Preferably, in order to adjust the supporting angle of the supporting plate 5 according to the deformation of the side wall of the foundation pit when in use, a plurality of supporting pieces 7 are further arranged on the horizontal supporting rod 6, the supporting pieces 7 are fixedly installed on the horizontal supporting rod 6, hydraulic pieces 71 are installed on the supporting pieces 7, the end parts of piston rods of the hydraulic pieces 71 are matched with the hinging seats 51 arranged on the supporting plate 5, namely, when in use, the hinging seats 51 are connected with the hydraulic pieces 71 through connecting pins to complete the installation of the supporting plate 5, and when in use, the tilting angle of the supporting plate 5 can be adjusted through the hydraulic pieces 71 according to the deformation of the side wall of the foundation pit to complete the support of the side wall of the foundation pit.
Preferably, the hydraulic member 71 is preferably a hydraulic cylinder.
Preferably, in the use process, in order to reduce the acting force of the water pressure on the side wall of the foundation pit on the supporting plate 5 to reduce the pressure on the supporting plate 5, a plurality of pressure relief holes 52 are further formed in the supporting plate 5, so that the pressure on the side wall of the foundation pit is conveniently released.
Preferably, in order to enhance the integrity between the support plate 5 and the side wall of the foundation pit, after the support plate 5 is installed in use, an anchor piece 53 is arranged on the support plate 5 to penetrate into the side wall of the foundation pit, so as to enhance the integrity between the support plate 5 and the side wall of the foundation pit.
Preferably, the anchoring member 53 is an anchor cable or an anchor rod structure.
Example 2: unlike embodiment 1, in use, in order to facilitate the formation of continuous support for the side wall of the foundation pit when the foundation pit maintenance structure is in use, a support connecting member is further provided between two adjacent foundation pit maintenance structures, and when in use, the two foundation pit maintenance structures adjacent to each other are connected by the support connecting member to form a continuous support structure.
Preferably, the support connecting piece include connecting piece body 15, horizontal board 16 and the lever 19 of stepping down of transversely, the both ends of connecting piece body 15 are provided with draw-in groove 18, draw-in groove 18 and backup pad 5 cooperation use, promptly when using, utilize the pin joint to tie up backup pad 5 and connecting piece body 15, form continuous bearing structure, horizontal board 16 of stepping down is installed in the expansion tank of connecting piece body 15 inboard through a plurality of first reset springs 17, promptly when the pressure of foundation ditch lateral wall is received to horizontal board 16 of stepping down, first reset spring 17 can be compressed at first, carries out the preliminary buffering of external pressure, the lever 19 of stepping down sets up in the outside draw-in groove of connecting piece body 15, and is provided with second reset spring 20 in the outside draw-in groove of connecting piece body 15 level, lever 19 is used for spacing second reset spring 20, prevents that second reset spring 20 from receiving outside back crooked, and then realizes the secondary buffering to external pressure for two adjacent flexible connection is the pressure to avoid the instantaneous external force to receive the device after the pressure to receive the external force to buffer.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a karst area foundation ditch maintenance structure which characterized in that: comprises a base, a supporting frame and a supporting plate;
the base is arranged at the bottom of the foundation pit and is matched with the supporting frame for use;
the supporting frame comprises a transverse supporting rod, a longitudinal supporting rod, an inclined supporting rod and a horizontal supporting rod, wherein the longitudinal supporting rod is arranged on a base close to one side of the side wall of the foundation pit; the horizontal support rods are arranged between two adjacent longitudinal support rod brackets and are connected with the longitudinal support rods through first connecting pieces; the two ends of the transverse supporting rod are connected with the longitudinal supporting rod and the base far away from one side of the side wall of the foundation pit through second connecting pieces; the inclined stay bars are obliquely arranged, and two ends of the inclined stay bars are connected with the longitudinal support bars and the base through third connecting pieces;
the backup pad sets up in the outside of vertical bracing piece, uses with the foundation ditch lateral wall cooperation, and still has seted up a plurality of pressure release holes in the backup pad.
2. The karst area foundation pit maintenance structure of claim 1, wherein: the base comprises a supporting table, an auxiliary anti-pulling positioning pile and a main anti-pulling positioning pile, wherein the supporting table is of a round table structure, and a connecting sleeve is arranged on the supporting table and is matched with the longitudinal support for use; the auxiliary anti-pulling positioning pile and the main anti-pulling positioning pile are both arranged on the lower side of the supporting table, wherein the auxiliary anti-pulling positioning pile is symmetrically arranged on two sides of the main anti-pulling positioning pile, and limiting threads are arranged on the auxiliary anti-pulling positioning pile and the main anti-pulling positioning pile.
3. The karst area foundation pit maintenance structure of claim 1, wherein: the horizontal support rod on still be provided with a plurality of support pieces, support piece fixed mounting is on the horizontal support rod, and install the hydraulic part on the support piece, the piston rod tip of hydraulic part uses with the articulated seat cooperation that sets up in the backup pad.
4. A karst area pit maintenance structure according to claim 1 or 3, wherein: and the supporting plate is also provided with an anchor piece, and the anchor piece is matched with the side wall of the foundation pit.
5. The karst area foundation pit maintenance structure of claim 1, wherein: a supporting connecting piece is further arranged between the two adjacent foundation pit maintenance structures, the supporting connecting piece comprises a connecting piece body, a transverse abdicating plate and a horizontal abdicating rod, clamping grooves are formed in two ends of the connecting piece body, and the clamping grooves are matched with the supporting plate for use; the horizontal plate of stepping down is installed in the inboard expansion tank of connecting piece body through a plurality of first reset springs, the lever setting of stepping down in the outside draw-in groove of connecting piece body, and is provided with the second reset spring in the outside draw-in groove of connecting piece body level, the lever is stepped down to the level and the cooperation of second reset spring is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320023458.3U CN218933146U (en) | 2023-01-05 | 2023-01-05 | Karst area foundation pit maintenance structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320023458.3U CN218933146U (en) | 2023-01-05 | 2023-01-05 | Karst area foundation pit maintenance structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218933146U true CN218933146U (en) | 2023-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320023458.3U Active CN218933146U (en) | 2023-01-05 | 2023-01-05 | Karst area foundation pit maintenance structure |
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| Country | Link |
|---|---|
| CN (1) | CN218933146U (en) |
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2023
- 2023-01-05 CN CN202320023458.3U patent/CN218933146U/en active Active
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