CN111254941B - Civil engineering is safety support structure for foundation ditch - Google Patents
Civil engineering is safety support structure for foundation ditch Download PDFInfo
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- CN111254941B CN111254941B CN202010112941.XA CN202010112941A CN111254941B CN 111254941 B CN111254941 B CN 111254941B CN 202010112941 A CN202010112941 A CN 202010112941A CN 111254941 B CN111254941 B CN 111254941B
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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
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Abstract
The invention discloses a safety supporting structure for a civil engineering foundation pit, and belongs to the technical field of building construction. The external part of the shotcrete-anchor net retaining wall of the supporting structure is also provided with a steel plate supporting wall formed by splicing a plurality of steel plate supporting splice plates, and a supporting deformation monitoring mechanism is also arranged between the shotcrete-anchor net retaining wall and the steel plate supporting splice plates; the supporting deformation monitoring mechanism comprises a guide rod fixed between a shotcrete net retaining wall and a steel plate supporting splicing plate, a guide rail is arranged on the guide rod, a sliding connection piece and a sliding piece are arranged on the guide rail, a liquid level column is embedded in the steel plate supporting splicing plate, a piston channel extending to the shotcrete net retaining wall is arranged at the bottom of the liquid level column, a piston is connected in the piston channel in a sealing mode, indicating liquid is stored between the piston and the liquid level column, and a horizontal push rod is arranged on the sliding piece. The supporting structure can improve the safety of the supporting structure and improve the positioning accuracy of a region with larger deformation.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a safety supporting structure for a civil engineering foundation pit.
Background
When the building foundation pit is constructed, in order to ensure the construction safety and prevent the occurrence of collapse accidents, support measures must be taken for the excavated building foundation pit. The excavated soil body is in a dynamic balance state and is also in a process of gradually loosening the soil body, the strength of the soil body is gradually reduced along with the increase of time, and certain deformation is generated, and although the supporting structure can have a certain blocking effect on the deformation of the soil body, because various complex geological conditions and the values of physical and mechanical parameters of the soil body are variable values after the deep foundation pit is excavated, the stress condition of the supporting structure is difficult to accurately calculate, and in fact, more engineering accidents are caused by the excessive deformation of the supporting structure, so that the supporting deformation is necessarily monitored at any time while the supporting structure is reasonably designed.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a safety supporting structure for a civil engineering foundation pit.
The invention provides a safety supporting structure for a civil engineering foundation pit, which comprises a spray anchor net retaining wall, wherein a steel plate retaining wall formed by splicing a plurality of steel plate supporting splicing plates is also arranged outside the spray anchor net retaining wall; strut deformation monitoring mechanism is including fixing the guide bar between shotcrete net fender retaining wall and the steel sheet support splice plate, be equipped with the guide rail on the guide bar, sliding connection and slider on the guide rail, slider and shotcrete net fender retaining wall are connected, set up vertical holding tank on the steel sheet support splice plate, the embedded liquid level post that is equipped with of vertical holding tank, liquid level bottom of the column portion intercommunication has piston passageway, piston passageway is close to one side opening that shotcrete net kept off retaining wall, and the storage has the instruction liquid that can get into the liquid level post in the piston passageway, and piston passageway's opening part sealing connection has the piston, be equipped with the horizontal push rod who extends to in the piston passageway and be connected with the piston on the slider, be equipped with the scale mark that is used for reading instruction liquid height on the steel sheet support splice plate.
Preferably, the spray-anchoring net retaining and supporting wall comprises a reinforcing steel bar net and an anchoring piece, wherein the reinforcing steel bar net is attached to the inner wall of the foundation pit and is connected with the inner wall of the foundation pit through the anchoring piece, and concrete is sprayed on the reinforcing steel bar net.
Preferably, a liquid level detection device is arranged in the liquid level column, and the liquid level detection device is electrically connected with the controller and the alarm.
Preferably, the jet anchor net retaining wall and the steel plate retaining splice plate are fixedly connected through a plurality of anchor rods.
Preferably, the adjacent steel plate supporting splicing plates are detachably connected through a connecting piece.
Preferably, an elastic membrane for sealing the indicating liquid is arranged in the piston channel, and the piston is arranged on one side of the elastic membrane far away from the liquid level column.
Preferably, the liquid level detection device is a liquid level sensor.
Preferably, when only one liquid level column is embedded in the steel plate supporting splice plate, the bottom of the liquid level column is located at the midpoint of the height of the foundation pit.
Compared with the prior art, the invention has the beneficial effects that: the supporting structure comprises an anchor net retaining and supporting wall and a steel plate retaining and supporting wall arranged outside the jet anchor net retaining and supporting wall, the pressure of the jet anchor net retaining and supporting wall is shared by the steel plate retaining and supporting wall, the safety of the supporting structure is improved, and soil layer stress release caused by excavation is controlled and side slope displacement is restrained by the steel plate retaining and supporting wall and anchor rods on the jet anchor net retaining and supporting wall;
the deformation of the shotcrete-anchor-net retaining wall is monitored in real time through the retaining deformation monitoring mechanism, particularly the middle part with larger deformation of the foundation pit is preferentially detected, and the safety of the retaining structure is improved.
The steel plate supporting wall is formed by splicing the steel plate supporting splicing plates, so that the repeated utilization rate of the steel plate supporting splicing plates can be improved, more importantly, stress can be quickly and effectively released between the mutually spliced plate bodies, the service life of the steel plate supporting splicing plates is prolonged, in addition, the position of a hidden danger can be accurately positioned through the liquid level height change of liquid level columns on different steel plate supporting splicing plates, the hidden danger area is reinforced in a targeted manner, the supporting cost is reduced, and the positioning accuracy of a large deformation area is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a support deformation monitoring mechanism of the present invention;
FIG. 3 is a front view of the steel plate supporting splice plate of the present invention;
FIG. 4 is a schematic view of the slider of the present invention;
fig. 5 is a schematic view showing the connection relationship between the sliding member and the shotcrete-anchor-net-block retaining wall according to the present invention.
Description of reference numerals:
1. the device comprises a spray anchor net retaining and supporting wall, 2 steel plate supporting splice plates, 3 steel plate supporting walls, 4 supporting deformation monitoring mechanisms, 5 guide rods, 6 sliding parts, 61 sliding blocks, 62 connecting discs, 63 radiation strips, 64 compression springs, 65 connecting rods, 7 horizontal push rods, 8 liquid level columns, 9 piston channels, 10 pistons, 12 elastic membranes, 13 anchor rods and 14 vertical accommodating grooves.
Detailed Description
Detailed description of the preferred embodimentsthe following detailed description of the present invention will be made with reference to the accompanying drawings 1-3, although it should be understood that the scope of the present invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a safety supporting structure for a civil engineering foundation pit, which comprises a spray anchor net retaining and supporting wall 1, wherein a steel plate supporting wall 3 formed by splicing a plurality of steel plate supporting splicing plates 2 is also arranged outside the spray anchor net retaining and supporting wall 1, and at least one group of supporting deformation monitoring mechanisms 4 are also arranged between the spray anchor net retaining and supporting wall 1 and the steel plate supporting splicing plates 2; it includes fixing the guide bar 5 between spray anchor net fender retaining wall 1 and the steel sheet supporting splice plate 2 to strut deformation monitoring mechanism 4, be equipped with the guide rail on the guide bar 5, sliding connection and slider 6 set up vertical holding tank 14 on the guide rail, the embedded liquid level post 8 that is equipped with of vertical holding tank 14, the intercommunication of 8 bottoms of liquid level post has piston channel 9, piston channel 9 is close to one side opening that spray anchor net kept off retaining wall 1, and the storage has the instruction liquid that can get into liquid level post 8 in the piston channel 9, and piston channel 9's opening part sealing connection has piston 10, be equipped with on the slider 6 and extend to in the piston channel 9 and the horizontal push rod 7 of being connected with piston 10, be equipped with the scale mark that is used for reading the instruction liquid height on the steel sheet supporting splice plate 2.
In the above embodiment, firstly, the inner wall of the foundation pit is pre-supported by a shotcrete net support mode, and simultaneously, a steel plate support wall 3 formed by splicing a plurality of steel plate support splicing plates 2 is adopted for secondary support, the support structure has higher safety, and at least one set of support deformation monitoring mechanism 4 is arranged between the shotcrete net retaining wall 1 and the steel plate support splicing plates 2, so as to monitor the deformation condition of the shotcrete net retaining wall 1 in real time, improve the safety of foundation pit support and construction, the working principle of the support deformation monitoring mechanism 4 is as follows, when the shotcrete net retaining wall 1 deforms, the sliding part 6 is extruded by the shotcrete net retaining wall 1 and moves towards the steel plate support splicing plates 2 along the guide rod 5, so that the horizontal push rod 7 pushes the piston 10 to move towards the interior of the piston channel 9, and extrudes the indicating liquid stored in the piston channel 9 into the liquid level column 8, through observing the record to the liquid level height in the liquid level post 8, detect and spout anchor net fender retaining wall 1 and take place to warp, whether the deformation degree is controllable.
Wherein, slider 6 includes the slider 61 with guide bar 5 sliding connection, slider 61 is connected with connection pad 62 through the connecting rod, be equipped with a plurality of radiation strips 63 of outside radiation on the connection pad 62, the one end of radiation strip 63 is fixed on connection pad 62, the outer end of radiation strip 63 is connected with spray anchor net fender retaining wall 1 through compression spring 64. Aim at increases the slider and spouts anchor net fender retaining wall 1's contact connection, increases detection area, improves and detects the accuracy. The outer end of radiation strip is connected with spray anchor net fender retaining wall 1 through compression spring, under the normal condition, the spring is in compression state, keep off retaining wall 1 whole when spray anchor net and take place the displacement, then the spring does not play a role, spray anchor net keeps off retaining wall 1 and directly promotes slider 6 and removes, when spray anchor net keeps off a certain department in retaining wall 1 detection range and removes, then the radiation strip that is located this department produces the displacement, the spring between other radiation strip and spray anchor net fender retaining wall 1 is tensile, slider 6 still can take place the displacement, can not keep off retaining wall 1 fixed connection because of other radiation strips and spray anchor net, and the detection accuracy of local deformation is influenced.
The spray-anchoring net retaining and supporting wall 1 comprises a reinforcing steel bar net and an anchoring piece, the reinforcing steel bar net is attached to the inner wall of the foundation pit and is connected with the inner wall of the foundation pit through the anchoring piece, and concrete is sprayed on the reinforcing steel bar net.
Wherein, be equipped with liquid level detection device in the liquid level post 8, liquid level detection device is connected with controller and alarm electricity.
Wherein, the spray anchor net retaining and supporting wall 1 and the steel plate retaining and supporting splice plate 2 are fixedly connected through a plurality of anchor rods 13.
The adjacent steel plate supporting splice plates 2 are detachably connected through connecting pieces. The purpose is that the disassembly and the assembly are convenient, and the displacement support deformation monitoring mechanism 4 on the different steel plate support splicing plates 2 is independent, so that the deformation area can be accurately positioned when deformation occurs.
Wherein, an elastic membrane 12 for sealing the indicating liquid is arranged in the piston channel 9, and the piston 10 is arranged on one side of the elastic membrane 12 far away from the liquid level column 8. The purpose is to avoid the leakage of the indicating liquid.
Wherein, the liquid level detection device is a liquid level sensor.
When only one liquid level column 8 is embedded in the steel plate supporting splice plate 2, the bottom of the liquid level column 8 is positioned at the midpoint of the height of the foundation pit. And (4) detection accuracy.
In conclusion, the supporting structure comprises the anchor net retaining and supporting wall and the steel plate retaining wall arranged outside the jet anchor net retaining and supporting wall, the pressure of the jet anchor net retaining and supporting wall is shared by the steel plate retaining wall, the safety of the supporting structure is improved, and soil layer stress release caused by excavation is controlled and side slope displacement is restrained by the steel plate retaining wall and anchor rods on the jet anchor net retaining and supporting wall;
the deformation of the shotcrete-anchor-net retaining wall is monitored in real time through the retaining deformation monitoring mechanism, particularly the middle part with larger deformation of the foundation pit is preferentially detected, and the safety of the retaining structure is improved.
The steel plate supporting wall is formed by splicing the steel plate supporting splicing plates, so that the repeated utilization rate of the steel plate supporting splicing plates can be improved, more importantly, stress can be quickly and effectively released between the mutually spliced plate bodies, the service life of the steel plate supporting splicing plates is prolonged, in addition, the position of a hidden danger can be accurately positioned through the liquid level height change of liquid level columns on different steel plate supporting splicing plates, the hidden danger area is reinforced in a targeted manner, the supporting cost is reduced, and the positioning accuracy of the hidden danger area is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The safety supporting structure for the civil engineering foundation pit is characterized by comprising a spray anchor net retaining and supporting wall (1), wherein a steel plate retaining wall (3) formed by splicing a plurality of steel plate supporting splicing plates (2) is further arranged outside the spray anchor net retaining and supporting wall (1), and at least one group of supporting deformation monitoring mechanisms (4) are further arranged between the spray anchor net retaining and supporting wall (1) and the steel plate supporting splicing plates (2); the supporting deformation monitoring mechanism (4) comprises a guide rod (5) fixed between a spray anchor net retaining wall (1) and a steel plate supporting splicing plate (2), a guide rail is arranged on the guide rod (5), a sliding part (6) is connected to the guide rail in a sliding mode, the sliding part (6) is connected with the spray anchor net retaining wall (1), a vertical accommodating groove (14) is formed in the steel plate supporting splicing plate (2), a liquid level column (8) is embedded in the vertical accommodating groove (14), a piston channel (9) is communicated with the bottom of the liquid level column (8), the piston channel (9) is close to one side opening of the spray anchor net retaining wall (1), indicating liquid capable of entering the liquid level column (8) is stored in the piston channel (9), a piston (10) is connected to the opening of the piston channel (9) in a sealing mode, a horizontal push rod (7) which extends into the piston channel (9) and is connected with the piston (10) is arranged on the sliding part (6), and scale marks for reading the height of the indicating liquid are arranged on the steel plate supporting splicing plates (2).
2. The safety support structure for the civil engineering foundation pit as claimed in claim 1, wherein the sliding member (6) comprises a sliding block (61) slidably connected with the guide rod (5), the sliding block (61) is connected with a connecting disc (62) through a connecting rod (65), a plurality of radiating strips (63) radiating outwards are arranged on the connecting disc (62), one ends of the radiating strips (63) are fixed on the connecting disc (62), and the outer ends of the radiating strips (63) are connected with the jet anchor net retaining wall (1) through compression springs (64).
3. The safety support structure for a civil engineering foundation pit as claimed in claim 1, wherein the jet-anchored net retaining and supporting wall (1) comprises a reinforcing mesh and an anchoring member, the reinforcing mesh is attached to the inner wall of the foundation pit and connected to the inner wall of the foundation pit by the anchoring member, and concrete is sprayed on the reinforcing mesh.
4. The safety support structure for a civil engineering foundation pit as claimed in claim 1, wherein a liquid level detection device is provided in the liquid level column (8), and the liquid level detection device is electrically connected with the controller and the alarm.
5. The safety support structure for a civil engineering foundation pit as claimed in claim 1, wherein the jet anchor net retaining wall (1) and the steel plate retaining splice plate (2) are fixedly connected by a plurality of anchor rods (13).
6. The safety support structure for a civil engineering foundation pit as claimed in claim 1, wherein adjacent steel plate support splice plates (2) are detachably connected by a connecting member.
7. Safety support structure for civil engineering foundation pits according to claim 1, characterized in that an elastic membrane (12) for sealing the indicating liquid is arranged in the piston channel (9), and the piston (10) is arranged on the side of the elastic membrane (12) far away from the liquid level column (8).
8. The safety support structure for a civil engineering foundation pit as claimed in claim 4, wherein the liquid level detecting means is a liquid level sensor.
9. The safety support structure for a civil engineering foundation pit as claimed in claim 1, wherein when only one liquid level column (8) is embedded in the steel plate support splice plate (2), the bottom of the liquid level column (8) is located at the midpoint of the height of the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112941.XA CN111254941B (en) | 2020-02-24 | 2020-02-24 | Civil engineering is safety support structure for foundation ditch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112941.XA CN111254941B (en) | 2020-02-24 | 2020-02-24 | Civil engineering is safety support structure for foundation ditch |
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| CN111254941A CN111254941A (en) | 2020-06-09 |
| CN111254941B true CN111254941B (en) | 2021-07-06 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3281870B2 (en) * | 1999-01-20 | 2002-05-13 | 大和建工株式会社 | Method and apparatus for measuring lateral pressure applied to earth retaining support frame |
| CN105672375B (en) * | 2016-03-31 | 2018-06-19 | 广州市城市建设工程监理公司 | Foundation pit displacement automatic monitoring system and method |
| CN208183817U (en) * | 2018-03-10 | 2018-12-04 | 浙江海北勘察股份有限公司 | A kind of foundation pit enclosure body displacement deformation real-time detection and control system |
| CN108517872B (en) * | 2018-04-10 | 2020-04-28 | 西南交通大学 | Method for measuring foundation pit deformation |
| CN208183759U (en) * | 2018-04-12 | 2018-12-04 | 中晟华兴国际建工有限公司 | A kind of foundation pit supporting construction with displacement measurement warning function |
| CN208251187U (en) * | 2018-04-16 | 2018-12-18 | 广西越知网络股份有限公司 | A kind of deep pit monitor monitoring system |
| CN109610526B (en) * | 2018-12-04 | 2020-09-08 | 中铁大桥局第七工程有限公司 | Monofilament temperature-change-resistant building enclosure monitoring device and building enclosure displacement measurement method |
| CN110185044B (en) * | 2019-06-17 | 2023-12-12 | 中铁上海设计院集团有限公司 | Foundation pit side wall stress adjustment system for deep unstable stratum |
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Effective date of registration: 20210617 Address after: No.55 Pingyuan Middle Road, Liangyuan District, Shangqiu City, Henan Province Applicant after: SHANGQIU NORMAL University Address before: No. 236, Suiyang Avenue, Shangqiu City, Henan Province Applicant before: Jingyi Gu |
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