CN114673176A - Energy absorption and buffering method for slope support measures - Google Patents
Energy absorption and buffering method for slope support measures Download PDFInfo
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- CN114673176A CN114673176A CN202210405360.4A CN202210405360A CN114673176A CN 114673176 A CN114673176 A CN 114673176A CN 202210405360 A CN202210405360 A CN 202210405360A CN 114673176 A CN114673176 A CN 114673176A
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 42
- 230000003139 buffering effect Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 115
- 239000010959 steel Substances 0.000 claims abstract description 115
- 230000007246 mechanism Effects 0.000 claims abstract description 70
- 239000002689 soil Substances 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 21
- 239000007787 solid Substances 0.000 description 22
- 239000011358 absorbing material Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005381 potential energy Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- E02D17/20—Securing of slopes or inclines
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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
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- 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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Abstract
A method for energy absorption and buffering of slope support measures comprises designing a sash mechanism according to a slope support structure, and arranging a plurality of energy absorption and buffering mechanisms in the sash mechanism; the energy absorption buffer mechanism absorbs the pressure change value borne by the slope support. The invention has the advantages that the energy-absorbing buffer mechanism formed by the stressed steel plate, the arched elastic steel plate and the anti-impact spring structure can absorb part of the energy which is increased rapidly and has the buffer function.
Description
Technical Field
The invention relates to the field of slope support measures, in particular to an energy-absorbing buffering method for the rear sides of retaining walls and anti-slide piles.
Technical Field
The stability problem of the side slope is frequently encountered in engineering construction, such as a bank side slope, a highway side slope, an inlet and outlet side slope of a tunnel, a building side slope and the like. Once the side slope is unstable, the traffic transportation and water storage irrigation are affected slightly, and the life and property safety of people is threatened seriously. Therefore, the stability is taken as the basis of analysis, reasonable supporting measures are designed, so that the safety of the side slope and the surrounding environment of the side slope is ensured, and common supporting measures comprise retaining walls, anti-slide piles and the like. However, under the action of external load, the retaining wall is easy to slip, overturn and crack, and the anti-slide pile is also sheared, broken, pushed and the like. The main reason is that the retaining wall and the anti-slide pile are typical rigid supporting structures, the deformation allowed under the action of the soil pressure behind the wall (pile) is very small, if a deformation buffer layer can be arranged behind the wall (pile), the buffer layer has the rigidity close to that of the wall body, the soil pressure can be well transferred, when the soil body behind the wall is greatly deformed, the buffer layer can generate larger deformation, the rigidity can be kept in the deformation process, namely, the load transfer capacity is unchanged, and the defect of deformation resistance of supporting measures such as the retaining wall and the anti-slide pile can be well overcome.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an energy-absorbing buffering method for slope supporting measures, which utilizes an energy-absorbing buffering mechanism consisting of a stressed steel plate, an arched elastic steel plate and an impact-resistant spring structure, is filled with energy-absorbing materials as auxiliary materials, is fixed in a sash mechanism and is arranged at the back of a supporting structure body. Under the condition of sudden increase of external load, the energy of partial sharp increase can be absorbed, the buffer effect is achieved, and the support measures are effectively prevented from being subjected to brittle failure. In addition, the arch-shaped elastic steel plate is provided with a strain gauge, and a stress deformation monitoring mechanism is formed by a cable and an external resistance strain gauge and is used for real-time monitoring and early warning.
In order to solve the technical problems, the invention adopts the technical scheme that: an energy absorption buffer device of a slope support measure comprises an energy absorption buffer mechanism, wherein the energy absorption buffer mechanism is arranged between a slope support and a rock-soil body;
the energy-absorbing buffer mechanism comprises a stressed steel plate and an arched elastic steel plate, the stressed steel plate and the arched elastic steel plate form a contour through clamping grooves, an anti-impact spring structure is arranged inside the contour, one end of the anti-impact spring structure is connected to the arched elastic steel plate, the other end of the anti-impact spring structure is connected with the arched elastic steel plate or the stressed steel plate, and energy-absorbing materials are filled inside the contour;
at least one of the stressed steel plates faces the rock-soil body, and the arched elastic steel plate is not in contact with the rock-soil body.
Furthermore, the buffer device also comprises a sash mechanism;
the sash mechanism is a box-type device with a plurality of independent spaces made of flexible materials, and one or more energy-absorbing buffer mechanisms are arranged in each independent space.
Furthermore, the buffer device also comprises a stress deformation monitoring mechanism arranged on the energy absorption buffer mechanism;
the stress deformation monitoring mechanism comprises a strain gauge and a resistance strain gauge connected with the strain gauge, and the strain gauge is arranged on the arched elastic steel plate.
Furthermore, the anti-impact spring structure comprises a solid steel column in the middle and sleeves which are respectively arranged at two sides of the solid steel column and internally provided with springs;
one end of the sleeve is connected with the solid steel column, and the other end of the sleeve is connected with the arch-shaped elastic steel plate.
Furthermore, the solid steel column is connected with the sleeve guide groove through a protruding rectangular body, and a pop-up buffer prism body is arranged in the guide groove.
Furthermore, the pop-up buffer prism body is composed of a flat right-angled prism body and a spring part at the lower part of the right-angled prism body, and under the action of sudden increase of external load, the solid steel column actually slides in the guide groove and presses the flat right-angled prism body to the lower part of the guide groove, so that the buffer effect is achieved; when the external load is balanced to a part, the right-angle triangular prism is popped up again under the action of the spring, and a buffer space is reserved for the next sudden change.
Further, energy-absorbing buffer gear includes three atress steel sheets, two hunch form elastic steel sheet, three atress steel sheet and two hunch form elastic steel sheet pass through the draw-in groove and constitute the profile, anti impact spring structure one end connect in hunch form elastic steel sheet, the other end connect with hunch form elastic steel sheet corresponds atress steel sheet, the inside energy-absorbing material that fills of profile, two hunch form elastic steel sheet connect one jointly atress steel sheet.
Further, energy-absorbing buffer gear includes a atress steel sheet, three hunch form elastic steel plates, one atress steel sheet and three hunch form elastic steel plate pass through the draw-in groove and constitute the profile, anti impact spring structure one end connect the hunch form elastic steel plate that corresponds at hunch form elastic steel plate, the other end, the inside energy-absorbing material that fills of profile, not with the hunch form elastic steel plate that impact spring connects contacts with the side slope support.
A method for energy absorption and buffering of slope support measures comprises designing a sash mechanism according to a slope support structure, and arranging a plurality of energy absorption and buffering mechanisms in the sash mechanism;
the energy absorption buffer mechanism absorbs the pressure change value borne by the slope support.
Furthermore, the method also comprises stress monitoring, wherein each energy absorption buffer mechanism is provided with a stress deformation monitoring mechanism, and the stress change value of the supporting structure, which is subjected to the rock-soil body, is converted into a stress deformation monitoring mechanism numerical signal.
Furthermore, the arch radian and/or thickness of the arch-shaped elastic steel plate can be adjusted, and the limit value of the pressure change value borne by the energy absorption buffer mechanism for absorbing the slope support is adjusted by adjusting the arch radian and/or thickness of the arch-shaped elastic steel plate;
the arch radian of the arch-shaped elastic steel plate is more than or equal to 125 degrees and less than or equal to 185 degrees.
The invention discloses an energy absorption buffer device and method for slope support measures, which have the following technical effects:
1) when the external load is in a stable state, the external load acts on the external contact surface of the buffer device, the load can be transmitted to the supporting structure under the conditions that the impact-resistant spring structure is slightly compressed and the arch-shaped elastic steel plates and the springs on the two sides are slightly deformed, and the energy-absorbing and buffering effects are not obvious at the moment.
2) When the external load suddenly changes (earthquake, landslide and the like), the load acting on the external contact surface of the buffer device is suddenly increased, the gravitational potential energy and the kinetic energy generated under the sudden change of the load are partially converted into elastic potential energy to be absorbed, the elastic potential energy and the kinetic energy are reflected in that the arched elastic steel plate is bent inwards to a large extent, the impact-resistant spring structure is compressed, meanwhile, the stressed steel plate in contact with the rock-soil body is displaced downwards, and the energy-absorbing material filled inside is extruded. Through the energy absorption and buffering process, the sharply increased energy is weakened and transferred to the supporting structure in a relatively soft manner. Meanwhile, deformation generated by external load mainly occurs in the energy absorption buffer device, so that deformation of the supporting structure is greatly reduced, and deformation damage of the supporting structure due to sudden load change is effectively prevented.
3) When the external load changes periodically, taking a reservoir area hydro-fluctuation belt as an example, in the stage of rapid water level falling, the groundwater rising back from the rock-soil body on the upper part of the previous supporting structure cannot be dissipated, the outward osmotic pressure of the rock-soil body acts on the supporting structure in the form of load, and at the moment, the arch-shaped elastic steel plate and the impact-resistant spring structure contract inwards to generate large deformation, so that the energy absorption and buffering effects are exerted; in the water level rising stage, the reservoir water acts on the stressed steel plate through the supporting structure to provide external load of the thrust balancing part, so that the arch-shaped elastic steel plate, the anti-impact spring structure and the energy absorption material restore part to be deformed, the whole device expands outwards, and a deformation buffer space is reserved for the next external load change.
4) The real-time monitoring of the soil pressure and deformation at the rear part of the wall (pile) can be realized through a plurality of stress deformation monitoring mechanisms which are uniformly distributed, corresponding measures can be timely taken to process when the stress deformation is close to the limit, and the effects of early warning and prevention and control in advance are achieved.
5) The distribution diagram (shown in figure 2) of the soil pressure behind the retaining wall in the specification SL379-2007 of the hydraulic retaining wall design and the distribution diagram (shown in figure 2) of the soil pressure behind the slide pile in the specification GB50330-2013 of the building slope engineering are different in distribution in space according to the load acted on the energy-absorbing buffer device by the soil pressure, and are influenced by factors such as the buried depth, the height of underground water and the like. Through adjusting the stiffness coefficient of springs at different depth positions and the rigidity of the arched elastic steel plate, the deformation of the whole energy-absorbing buffer device under the action of an external load is approximately the same, and the influence on the whole stress due to local concave-convex is avoided. Meanwhile, the whole energy absorption buffer device layer has a function of adjusting the soil pressure behind the wall and the pile.
Description of the drawings:
FIG. 1 is a schematic view of the overall structure (retaining wall, anti-slide pile) of the present invention;
fig. 2 is a graph showing the pressure distribution of soil in a retaining wall (a gravity retaining wall, for example) and an anti-slide pile (a cantilever pile);
FIG. 3 is a schematic view of a sash structure of the present invention;
FIG. 4 is a schematic view of an energy absorbing and cushioning mechanism of the present invention;
FIG. 5 is a schematic view of the structure of the anti-impact spring of the present invention;
FIG. 6 is a front view of the impact spring configuration of the present invention;
FIG. 7 is a schematic view of a solid steel column of the present invention;
FIG. 8 is a schematic view of a bushing according to the present invention;
FIG. 9 is a schematic view of a rubber boot according to the present invention;
FIG. 10 is a schematic view of the installation of a pop-up bumper prism according to the present invention;
FIG. 11 is a detail view of a pop-up buffer prism of the present invention;
FIG. 12 is a preferred schematic view of an energy absorbing and cushioning mechanism;
FIG. 13 is a schematic view of a unit cell and a resistance strain gauge according to the present invention;
FIG. 14 is a side view of the engagement between the locking groove and two steel plates according to the present invention;
FIG. 15 is a side view of the retaining groove;
FIG. 16 is another preferred schematic view of an energy absorbing and cushioning mechanism;
FIG. 17 is a schematic view of a slope support structure with curved surfaces protruding outward;
fig. 18 is a schematic structural view of a slope supporting structure with a curved inward protrusion.
In the figure: the energy-absorbing and buffering device comprises an energy-absorbing and buffering device 1, a foundation 2, a wall body 3, a cover plate 4, a sash mechanism 5, an energy-absorbing and buffering mechanism 6, a stressed steel plate 6-1, an arched elastic steel plate 6-2, an impact-resistant spring structure 6-3, a spring 6-3-1, a rubber sleeve 6-3-2, a solid steel column 6-3-3, a sleeve 6-3-4, a pop-up buffering prism 6-3-5, an anti-slide pile 9, a side slope 10, a clamping groove 11, a fixing groove 12, a strain sheet 13, a cable 14, a resistance strain gauge 15, a protruding rectangular body 16 and a guide groove 17.
Detailed Description
As shown in fig. 1 and 2, an energy absorption and buffering device 1 for a slope support measure is arranged between a slope 10 support (an anti-slide pile 9 or a wall 3, a foundation 2 is arranged at the lower end of the wall 3, and a cover plate 4 is arranged at the upper end) and a rock-soil body to play an energy absorption and buffering role.
The energy absorption buffer device 1 of the slope support measure comprises an energy absorption buffer mechanism 6, a sash mechanism 5 and a stress deformation monitoring mechanism, as shown in fig. 4, the energy absorption buffer mechanism 6 comprises a stressed steel plate 6-1 and an arch-shaped elastic steel plate 6-2, the stressed steel plate 6-1 and the arch-shaped elastic steel plate 6-2 form a contour through a clamping groove, an anti-impact spring structure 6-3 is arranged inside the contour, one end of the anti-impact spring structure 6-3 is connected with the arch-shaped elastic steel plate 6-2, the other end of the anti-impact spring structure is connected with the arch-shaped elastic steel plate 6-2 or the stressed steel plate 6-1, and energy absorption materials are filled inside the contour; because the distribution of the soil pressure behind the wall and the pile is influenced by factors such as buried depth, underground water and the like, the requirements of different spatial positions on energy absorption and buffering can be met by adjusting the stiffness coefficient of the spring in the anti-impact spring structure 6-3 and the stiffness of the arched elastic steel plate 6-2.
At least one stressed steel plate 6-1 faces the rock-soil body, and the arched elastic steel plate 6-2 is not contacted with the rock-soil body;
as shown in fig. 3, the sash mechanism 5 is a box-type device with a plurality of independent spaces made of flexible materials, each independent space is internally provided with one or more energy-absorbing buffer mechanisms 6, each square is independent and the width of each square is matched with the energy-absorbing buffer mechanism 6, as shown in fig. 14 and 15, a vertical strip-shaped fixing groove 12 is formed in each independent space, the energy-absorbing buffer mechanisms are fastened in the sash through the fixing grooves 12 by the strip-shaped clamping grooves 11, a sealing effect is achieved while fixing points are provided for the energy-absorbing buffer mechanisms 6, metal parts are prevented from being corroded in the underground environment, and the service life of the whole device is prolonged.
The energy absorption buffer device 1 of the slope support measure also comprises a stress deformation monitoring mechanism arranged on the energy absorption buffer mechanism;
as shown in fig. 13, the stress deformation monitoring mechanism includes a strain gauge 13 and a resistance strain gauge 15 connected to the strain gauge 13, the strain gauge 13 is disposed on the arch-shaped elastic steel plate 6-2, and the strain gauge 13 is connected to the resistance strain gauge 15 through a cable 14.
As shown in fig. 5 and 6, the anti-impact spring structure 6-3 includes a solid steel column 6-3-3 in the middle and sleeves 6-3-4 respectively disposed at two sides of the solid steel column 6-3-3 and containing springs 6-3-1, and a filling space formed between the outer contour of the energy-absorbing buffer mechanism 6 and the anti-impact spring structure 6-3 can be filled with energy-absorbing buffer materials such as polypropylene foam plastics, waste rubber and the like;
one end of the sleeve 6-3-4 is connected with the solid steel column 6-3-3, and the other end is connected with the arch-shaped elastic steel plate 6-2.
Referring to fig. 7 and 8, the solid steel column 6-3-3 is connected with the guide groove 17 of the sleeve 6-3-4 through a protruding rectangular body 16, a pop-up buffer prism body 6-3-5 is arranged in the guide groove 17, the protruding rectangular body 16 is arranged at the upper end and the lower end of the solid steel column 6-3-3, and the outer diameter of the solid steel column 6-3-3 is slightly smaller than the inner diameter of the sleeve 6-3-4.
The sleeve 6-3-4 has a certain wall thickness, and the inner side of the sleeve is provided with a guide groove 17, the size of the guide groove is matched with the protruding rectangular body 16 of the solid steel column 6-3-3, and the relative sliding of the sleeve and the solid steel column is ensured.
As shown in fig. 10 and 11, the pop-up buffer prism 6-3-5 is composed of a flat right-angled prism and a spring body at the lower part of the right-angled prism, and under the action of sudden increase of external load, the solid steel column slides in the guide groove and presses the flat right-angled prism to the lower part of the guide groove, so as to play a role of buffering; when the external load is balanced to a part, the right-angle triangular prism is popped out again under the action of the spring, and a buffer space is reserved for the next sudden change. The shock-resistant spring structure 6-3 is formed by connecting a solid steel column 6-3-3 in the middle and sleeves 6-3-4 on two sides through a guide rail, a spring 6-3-1 is arranged in each sleeve 6-3-4, and a pop-up buffer prism 6-3-5 is arranged in each guide rail. Under the action of external load, the impact-resistant spring structure 6-3 is stressed, so that the solid steel column 6-3-3 slides in the guide rail to compress the spring 6-3-1, and meanwhile, the pop-up buffer arris 6-3-5 in the guide rail plays a buffer role in the solid steel column 6-3-3. Kinetic energy generated by external load is converted into elastic potential energy through the spring 6-3-1 and the pop-up buffer prism 6-3-5, and sudden load acting on the supporting structure can be buffered.
The unit body of the energy-absorbing buffer device 1 is taken as an example, the unit body is composed of a single energy-absorbing buffer mechanism 6 and a single sash 5, and the sizes of the unit body and the sash 5 are matched, so that the energy-absorbing buffer mechanism 6 and the sash 5 are ensured not to generate relative displacement under the action of external force. The stressed steel plate 6-1 is tightly attached to the rubber plate in the sash 5, one end of the stressed steel plate is in contact with the rock-soil body, and the other end of the stressed steel plate acts on a supporting measure; the energy-absorbing buffer mechanism 6 and the filling space 8 formed by the energy-absorbing buffer mechanism and the sash can be filled with energy-absorbing buffer materials such as polypropylene foam plastics, waste rubber and the like. A plurality of strain gauges 13 are arranged in each unit body (the specific number is based on actual requirements, 8 strain gauges are used as an indication in the invention), the strain gauges 13 are gathered at the top of the unit bodies through connecting wires, and each unit body transmits strain data to a resistance strain gauge 15 through a cable 14 to perform real-time stress deformation monitoring and play a role in meeting early warning.
The energy-absorbing buffer device which is integrated by the unit bodies is arranged on the back of the supporting structure, and the energy generated by external load is converted into the elastic energy of the energy-absorbing buffer device, so that the buffering effect is provided for the supporting structure.
As shown in FIG. 9, a rubber sleeve 6-3-2 is arranged between the two sleeves 6-3-4 to protect the solid steel column 6-3-3 in the middle from being corroded. When the external load suddenly changes, the arched elastic steel plate is extruded inwards, the solid steel column 6-3-3 slides in the guide grooves 17 in the sleeves 6-3-4 at two sides through the protruding rectangular bodies 16, and the solid steel column is buffered by the pop-up buffer arrises 6-3-5 in the guide grooves 17 besides the buffering action of the springs 6-3-1.
As shown in fig. 12, the energy-absorbing buffer mechanism 6 comprises three stressed steel plates 6-1 and two arched elastic steel plates 6-2, the three stressed steel plates 6-1 and the two arched elastic steel plates 6-2 form a contour through a slot, one end of the shock-resistant spring structure 6-3 is connected with an arch-shaped elastic steel plate 6-2, the other end is connected with the stressed steel plate 6-1 corresponding to the arch-shaped elastic steel plate 6-2, the inside of the outline is filled with energy-absorbing materials, two arch-shaped elastic steel plates 6-2 are connected with one stressed steel plate 6-1 together, the stressed steel plate 6-1 connecting the two arch-shaped elastic steel plates 6-2 can be a planar special-shaped structure, it can be trapezoid, triangle or parallelogram, and the structure can be used in slope supporting structure with curved surface protruding outward as shown in fig. 17.
As shown in fig. 16, the energy-absorbing buffer mechanism 6 includes a stressed steel plate 6-1 and three arched elastic steel plates 6-2, one stressed steel plate 6-1 and three arched elastic steel plates 6-2 form a contour through a slot, one end of the anti-impact spring structure 6-3 is connected to the arched elastic steel plate 6-1, the other end is connected to the corresponding arched elastic steel plate 6-2, the inside of the contour is filled with an energy-absorbing material, the arched elastic steel plate 6-2 which is not connected with the anti-impact spring is contacted with a slope support, and the structure is suitable for a structure in which the slope support structure is a curved surface inward protrusion structure as shown in fig. 18.
A method for energy absorption and buffering of slope support measures comprises designing a sash mechanism according to a slope support structure, and arranging a plurality of energy absorption and buffering mechanisms in the sash mechanism;
the energy absorption buffer mechanism absorbs the pressure change value borne by the slope support.
Every energy-absorbing buffer on set up a stress deformation monitoring mechanism, supporting construction receives the atress change value of the ground body to turn into stress deformation monitoring mechanism numerical signal, stress deformation monitoring mechanism pass through the cable conductor and outside resistance strain gauge by 4 pairs of foil gauges that are fixed in on the hunch form elastic steel plate and constitute, through surveying the mechanical parameter of meeting an emergency and the steel sheet self of hunch form elastic steel plate, can calculate the atress condition and the deformation condition that reachs hunch form elastic steel plate, finally reachs the soil pressure and the deformation condition of wall (stake) back each point, play the effect of monitoring and early warning.
The arch radian and/or thickness of the arch-shaped elastic steel plate can be adjusted, and the limit value of the pressure change value borne by the energy absorption buffer mechanism for absorbing the slope support is adjusted by adjusting the arch radian and/or thickness of the arch-shaped elastic steel plate;
the arch radian of the arch-shaped elastic steel plate is more than or equal to 125 degrees and less than or equal to 185 degrees, the arch radian (an included angle formed by two ends of the arch-shaped elastic steel plate to the center of a concentric circle) of the arch-shaped elastic steel plate is increased from 125 degrees to 185 degrees, the limit value of the pressure change value borne by a slope support absorbed by the energy absorption buffer mechanism is increased from small, when the thickness is increased, the limit value of the pressure change value borne by the slope support absorbed by the energy absorption buffer mechanism is increased from small, in the design process, the arch-shaped elastic steel plate with large arch radian and large thickness can be arranged in a region with large stress on the wall body, the arch-shaped elastic steel plate with small arch radian and small thickness is arranged in a region with small stress on the wall body, so that the stability of the wall body is ensured, the wall body can be favorably protected under the condition of reducing cost, the specific change of the stress on the wall body can be known in real use process through the stress deformation monitoring mechanism, and the energy absorption buffer mechanism in the region which cannot meet the change requirement can be replaced.
Claims (3)
1. An energy absorption and buffering method for slope support measures is characterized in that: the method comprises the steps that a sash mechanism is designed according to a slope supporting structure, and a plurality of energy absorption buffer mechanisms are arranged in the sash mechanism;
the energy absorption buffer mechanism absorbs the pressure change value borne by the slope support.
2. The method of claim 1, wherein the method comprises the following steps: the method also comprises stress monitoring, wherein each energy absorption buffer mechanism is provided with a stress deformation monitoring mechanism, and the stress change value of the rock-soil mass of the supporting structure is converted into a stress deformation monitoring mechanism numerical signal.
3. The method for energy absorption and buffering of slope support measures according to claim 1 or 2, characterized in that: the arch radian and/or thickness of the arch-shaped elastic steel plate can be adjusted, and the limit value of the pressure change value borne by the slope support absorbed by the energy absorption buffer mechanism is adjusted by adjusting the arch radian and/or thickness of the arch-shaped elastic steel plate;
the arch radian of the arch-shaped elastic steel plate is more than or equal to 125 degrees and less than or equal to 185 degrees.
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| CN202110027093.7A CN112832264B (en) | 2021-01-09 | 2021-01-09 | Energy absorption buffer device and buffer method for slope support measures |
| CN202210405360.4A CN114673176A (en) | 2021-01-09 | 2021-01-09 | Energy absorption and buffering method for slope support measures |
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| CN116018959A (en) * | 2023-02-10 | 2023-04-28 | 中国十九冶集团有限公司 | Vertical greening structure and method for separated type falling area |
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| CN115217125B (en) * | 2022-07-12 | 2023-09-26 | 四川省公路规划勘察设计研究院有限公司 | Multi-layer sliding belt stacking layer landslide anti-sliding support structure |
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| CN112832264B (en) | 2022-06-03 |
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