CN214408964U - Soil slope filling process simulation device - Google Patents
Soil slope filling process simulation device Download PDFInfo
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- CN214408964U CN214408964U CN202120484443.8U CN202120484443U CN214408964U CN 214408964 U CN214408964 U CN 214408964U CN 202120484443 U CN202120484443 U CN 202120484443U CN 214408964 U CN214408964 U CN 214408964U
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Abstract
本实用新型涉及岩土工程领域，提供了一种土坡堆填过程模拟装置，包括：模型箱用于填筑地基土体和载荷板；杠杆加载系统由多根中间镂空杠杆环环相套组成，分别独立施加堆填荷载；反力系统用于传递砝码重力，使之作用于地基土体上的载荷板；监测系统用于检验所模拟堆填荷载的准确性并获得地基土体表面沉降。本实用新型能够模拟不同形状土坡的堆填过程，并分析土坡堆填对地基土体产生的沉降变形，为实际工程提供参考。
The utility model relates to the field of geotechnical engineering, and provides a soil slope filling process simulation device, comprising: a model box used for filling foundation soil and a load plate; a lever loading system is composed of a plurality of intermediate hollow lever rings interlocked with each other , respectively apply the landfill load independently; the reaction force system is used to transmit the weight gravity, so that it acts on the load plate on the foundation soil; the monitoring system is used to check the accuracy of the simulated landfill load and obtain the surface settlement of the foundation soil . The utility model can simulate the filling process of soil slopes of different shapes, and analyze the settlement deformation of the foundation soil caused by the filling of the soil slopes, so as to provide reference for actual engineering.
Description
Technical Field
The utility model relates to a geotechnical engineering field relates to the simulation of soil slope landfill load, concretely relates to soil slope landfill process analogue means.
Background
With the continuous promotion of the urbanization process in China, a plurality of soil slope landfill structures are formed, such as engineering residue soil mounds, household garbage landfill sites, building garbage receiving sites, embankments and the like. The soil slope filling structures have the characteristics of large vertical load, uneven load distribution and the like, and can generate large uneven settlement on foundation soil bodies, so that potential safety hazards are brought to the soil slope filling process. Therefore, before actual filling engineering construction, a model test is needed to simulate the filling process of the soil slope and research the corresponding foundation soil body settlement deformation rule. Most of the existing soil slope filling process simulation devices can only be used for simulating the filling process of a soil slope with a single gradient, the filling processes of the soil slopes with different shapes are difficult to simulate, and filling loads of all soil layers can only be applied to a foundation soil body at one time, so that the independent loading and layer-by-layer loading processes of the filling loads of all layers are difficult to effectively realize.
Document CN107655743B discloses a geotechnical engineering loading and unloading comprehensive simulation box and an operation method thereof, comprising a closed box for water injection and pressurization and a plurality of parallel moving rods horizontally extending in the box, wherein one side surface of the box is fixed in contact with a soil box to be tested, a restraining plate, a leakage-proof membrane and a load plate are sequentially arranged from inside to outside, one end of each moving rod extends out of the box, the other end of each moving rod passes through an organic glass plate, the restraining plate and the leakage-proof membrane and is fixed on the load plate in a sealing manner, the load plate comprises twelve blocks, a thin film pressure sensor is arranged on the outer surface of the load plate, the long-standing problem of difficult simulation of lateral loading and unloading of indoor soil is solved, the lateral loading and unloading of the soil can be realized by loading and unloading the twelve load plates, the whole loading and unloading and the grading loading and unloading of the soil can be realized, and the pressure can be controlled to be lifted to realize the loading simulation and unloading of the soil with any strength, the device has practical significance for simulating high-fill pile loading and lateral excavation unloading of the ultra-deep foundation pit, and the whole testing device has strong controllability and functionality and is easy to operate, popularize and use. However, although the method can realize soil body loading and unloading simulation with various strengths, because the method performs pressure simulation by matching water body and gas, when the pressure direction is turned to the gravity direction, the layer-by-layer superposition and independent loading process of the landfill load is difficult to effectively simulate; meanwhile, the method is complex in use process, and the size of the simulation load, the time cost and the equipment cost cannot be adjusted quickly.
Document CN103485371A discloses a device and a method for simulating foundation failure mode and testing bearing capacity, the device includes an organic glass box, a cover plate, a small-sized motor, a gear fixing plate, a capacitive film pressure sensor, a stress collector and a pressure measuring tube, the appearance of the instrument is a square model box, the small-sized motor is anchored above the box cover, and a gear is driven by a chain to rotate, so that a gear rod is pressed downwards; the strip-shaped foundation is fixed below the gear rod; the base is provided with four capacitive film pressure sensors, when the strip-shaped base is pressed into the foundation, the bearing capacity of the foundation under different foundation design conditions is obtained through a p-S curve drawn by actually measured stress, meanwhile, the bearing capacity of the foundation is calculated through a theoretical formula according to parameters such as volume weight gamma, cohesive force c, foundation burial depth d, base width b and underground water level, and the like, and the numerical values calculated through various bearing capacity formulas can be compared with actually measured numerical values for analysis. However, in the above technical solution, the motor is used as a power source to simulate the bearing capacity of the foundation, and the process of bearing the upper layer-by-layer superposed load on the foundation cannot be simulated, so that the transmission mechanism is complex, the operation is complex, and the implementation cost is high.
Therefore, a soil slope filling process simulation device is needed to simulate the filling processes of soil slopes with different shapes, realize independent loading and layer-by-layer loading processes of each layer of filling load, and provide a device for the research on the problem of uneven settlement of the foundation soil body caused by the soil slope filling process.
SUMMERY OF THE UTILITY MODEL
In order to simulate different shapes soil slope stowing process to realize independent loading and successive layer loading of each layer stowing load, the utility model provides a soil slope stowing process simulation device.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a soil slope landfill process analogue means which characterized in that: the device comprises a model box, a lever loading system, a counter-force system and a monitoring system, wherein the lever loading system comprises a lever sleeve group, a weight tray, weights, a dowel steel and a load plate, the counter-force system comprises a counter-force beam, a stand column and a bottom plate, and the monitoring system comprises displacement acquisition equipment and pressure acquisition equipment; an opening is formed in the top of the model box, the stand column is arranged on the outer side of the model box, and a foundation soil body is arranged on the inner side of the model box; the bottom of the upright post is fixedly connected with the bottom plate, and the top of the upright post is fixedly connected with the counter-force beam; the load plate is arranged above the foundation soil body, the bottom of the dowel bar is connected with the load plate through two branches, and the top of the dowel bar is connected with the lever sleeve set; the middle fulcrum of the lever sleeve set is connected to the counter-force beam, one side, away from the middle fulcrum, of the lever sleeve set is connected with the weight tray, and weights are loaded on the weight tray; the middle of the dowel bar is provided with the pressure acquisition equipment, and the load plate is provided with the displacement acquisition equipment.
Preferably, the lever sleeve group consists of a plurality of middle hollow levers which are mutually independent; preferably, the number of the dowel bars, the number of the load plates and the number of the sub-levers are the same. Preferably, the middle hollow lever is provided with a slide rail, the weight tray is suspended on a slide bar, and the slide bar is in sliding connection with the slide rail. As a preferred scheme, the sliding strip is an elastic strip rope, the left end and the right end of the sliding strip are hung on the outer wall of the sub-lever on the sliding rail, and the position of the weight tray on the lever is changed by moving the sliding strip.
Preferably, the lever is provided with scales which are uniformly distributed along the length direction of the lever and used for calculating the pressure applied to the dowel bar.
Preferably, the weight of the weight can be increased or decreased, and the position of the weight on the lever set can be changed, so that the pressure of the load plate on the foundation soil body can be adjusted.
As a preferable scheme, the load plate is fixed by the anchor bolts, and meanwhile, the load plate can be expanded into different widths by the anchor bolts, so that the filling simulation of different soil slope gradients is realized.
The pressure applied to the dowel bar is calculated by the lever principle, while being verified by a pressure acquisition device.
Preferably, the number of the displacement acquisition devices is two, the displacement acquisition devices are symmetrically distributed on two sides of the dowel bar and are used for mutually verifying the foundation soil body settlement test result.
The utility model discloses a use method as follows: a method for simulating an earth slope filling process is characterized by comprising the following steps:
s1: establishing an analysis model of the soil slope to be filled according to a preset proportion on the prototype of the soil slope to be filled, and determining the size of the model; setting the number N of filling layers of the soil slope analysis model, and determining the vertical load generated by each layer of soil body according to the soil slope prototype and the number N of filling layers;
s2: filling foundation soil at the bottom of the model box; horizontally arranging 2M load plates on the foundation soil body, and respectively arranging M load plates on the left side and the right side of each upright post, wherein M is more than or equal to N;
s3: setting n to 1;
s4: when n is equal to 1, applying vertical stress to the 1 st to 2M th load plates from left to right through an adjusting lever loading system, enabling the sum of the vertical stress borne by the 1 st to 2M th load plates to be equal to the vertical load of the 1 st layer of soil body, and simulating the pile filling of the 1 st layer of soil body; monitoring the vertical displacement of each load plate by using a displacement testing device so as to obtain a foundation soil body surface settlement line during the first layer soil body stacking period;
when n is greater than 1, keeping the vertical stress on the (n-1) th and 2M- (n-2) th load plates unchanged from left to right, adjusting the load plates from the n to the 2M- (n-1) th by the lever loading system to apply the vertical stress, enabling the sum of the added values of the vertical stress on the load plates from the n to the 2M- (n-1) th to be equal to the vertical load of the n layer of soil body, and simulating the pile filling of the n layer of soil body; monitoring the vertical displacement of each load plate by using a displacement testing device so as to obtain a surface settlement line of the foundation soil body during the filling period of the nth layer of soil body;
s5: judging whether N is true or not, if so, finishing soil body stacking simulation; if not, n is changed to n +1, and step S4 is repeated.
Preferably, in S2, M is greater than or equal to 2, the load plates are in a strip shape, and the load plates are uniformly arranged along the width direction of the load plates.
Preferably, in S2, the width of the load plate is determined according to the gradient of the soil slope analysis model.
The load plates are not fully distributed on the foundation soil body so as to reduce the influence of the boundary effect.
Preferably, the soil slope analysis model may be one of an asymmetric bidirectional soil slope, a symmetric bidirectional soil slope, a unidirectional soil slope, and an upright soil slope.
When the soil slope analysis model is an asymmetric bidirectional soil slope, in S2, the widths of the load plates on the left and right sides of the upright post are different; when the soil slope analysis model is a symmetrical bidirectional soil slope, in S2, the widths of the load plates on the left and right sides of the upright are the same; when the soil slope analysis model is a unidirectional soil slope, in the step S4, vertical stress is applied to the load plates from the 1 st to the M th from left to right by adjusting the lever loading system; and when the soil slope analysis model is a vertical soil slope, applying the same vertical stress to all the load plates.
The utility model discloses following beneficial effect has:
(1) the lever loading system is used for gradually applying pressure to each layer of filling load on the load plate to simulate the filling process of the soil slope, the weight mass is increased or decreased or the suspension position of the weight tray is moved to adjust the size of the simulated filling load, and the lever loading system has the advantages of simplicity and convenience in operation, low cost and the like;
(2) different slopes of the soil slope are simulated by adjusting the width of the load plate, and the platform of the soil slope is simulated by additionally arranging the load plate and applying pressure to a set value, so that the simulation of the filling process of the soil slopes with different shapes can be realized, and the soil slope filling simulation device has the advantages of simplicity and convenience in operation, low cost, wide application range and the like;
(3) through the lever sleeve set formed by sleeving the plurality of middle hollow lever rings, independent loading can be realized, so that the stacking process of each layer of soil body is simulated, the space and the material are saved, the loading process of each layer of stacked soil body is not interfered with each other, and the lever sleeve set has the advantages of ingenious design, space and material saving and the like;
(4) the pressure transmitted to the dowel bar by the lever loading system is verified through the pressure acquisition equipment, the accuracy of the simulated landfill load is ensured, and the displacement acquisition equipment symmetrically distributed on the two sides of the dowel bar is used for mutually verifying the foundation soil body settlement test result, so that the device has the advantages of accurate simulation process, reliable acquired data and the like.
Drawings
Fig. 1 is a side view of a soil slope landfill process simulation apparatus.
Fig. 2 is a plan view of a soil slope landfill process simulation device.
Fig. 3 is a sectional view a-a of the soil slope landfill process simulation apparatus.
Fig. 4 is a front view of an asymmetric bidirectional soil slope as a prototype of a soil slope to be filled.
Fig. 5 is a top view of an asymmetric bidirectional soil slope as a prototype of a soil slope to be filled.
Fig. 6 is a front view of a symmetrical bidirectional soil slope as a prototype of a soil slope to be filled.
Fig. 7 is a top view of a symmetrical bi-directional soil slope as a prototype of a soil slope to be filled.
Fig. 8 is a cross-sectional view of a fifth sub-lever of the soil slope landfill process simulation device.
In the figure: the device comprises a lever sleeve group 1, a weight 2, a weight tray 3, a force transmission rod 4, a load plate 5, a bottom plate 6, a stand column 7, a model box 8, an anchor bolt 9, a counter-force beam 10, a foundation soil body 11, a displacement acquisition device 12, a pressure acquisition device 13, a first sub-lever 14, a second sub-lever 15, a third sub-lever 16, a fourth sub-lever 17, a fifth sub-lever 18, a first force transmission rod 19, a second force transmission rod 20, a third force transmission rod 21, a fourth force transmission rod 22, a fifth force transmission rod 23, a slide rail 24 and a slide bar 25.
Detailed Description
The present invention will be further described with reference to the following detailed description of the drawings.
It should be noted that, without conflict, any combination of the various embodiments or technical features described below may form a new embodiment.
The first embodiment is as follows:
first, in this embodiment, a use method of the present invention is described.
As shown in fig. 1 to 5, a method for simulating an earth slope filling process simulates a filling process of an asymmetric bidirectional earth slope in the embodiment, and a prototype of an earth slope to be filled is shown in fig. 4 and 5, wherein the width of the bottom of the slope is 100m, the width of the top of the slope is 20m, the height of the slope is 10m, the length of the slope is 50m, the top and the bottom are equal, and the volume of the slope is 30000m3The volume weight of the filled soil is 20kN/m3Determining a filling design scheme to be filled in five layers, determining the scale ratio to be 1:100, and specifically comprising the following steps:
s1: establishing an analysis model of the soil slope to be filled according to the 1:100 reduced scale proportion of the prototype of the soil slope to be filled, and determining the size of the model as follows: the width of the upper part of the soil slope is 0.2m, the width of the lower part of the soil slope is 1m, the height of the soil slope is 0.1m, the length of the soil slope is 0.5m, and the slope of the left side of the soil slope is 1: 4.8, right slope 1: 3.2; determining the number of filling layers of the model to be analyzed to be five according to a filling design scheme, namely N is 5, and determining the vertical load of each layer of soil body according to the soil slope prototype and the number N of filling layers: the first layer of filling load is 2000kN, the second layer of filling load is 1600kN, the third layer of filling load is 1200kN, the fourth layer of filling load is 800kN, and the fifth layer of filling load is 400 kN;
s2: filling a foundation soil body 11 at the bottom of the model box 8; ten load plates 5 are horizontally arranged on a foundation soil body 11, and five load plates are respectively arranged on the left side and the right side of a stand column 7: the width of the load plate 5 on the left side of the upright post 7 is 0.12m, and the width of the load plate 5 on the right side is 0.08m, so as to simulate the soil slopes with different slopes on the two sides of the upright post 7;
s3: setting n to 1;
s4: simulating a first layer of soil filling load, applying 240kN of vertical stress to the first to fifth load plates 5 and 160kN of vertical stress to the sixth to tenth load plates 5 by adjusting a lever loading system from left to right, wherein the sum of the vertical stresses applied to the first to tenth load plates 5 is 2000kN, so as to simulate the filling of a first layer of soil; in this embodiment, the displacement testing device is a displacement collecting device 12, and the displacement collecting device 12 is used to monitor the vertical displacement of each load plate, so as to obtain a surface settlement line of the foundation soil body during the first-layer soil body stacking period;
s5: judging that N is not established, enabling N to be 2, repeating the simulation process, simulating the second layer of filling load, and keeping the vertical stress 240kN on the first load plate 5 and the vertical stress 160kN on the tenth load plate 5 unchanged from left to right; vertical stress 480kN is applied to the second to fifth load plates 5 through adjusting a lever loading system, vertical stress 320kN is applied to the sixth to ninth load plates 5, and the sum of the added values of the vertical stress on the second to ninth load plates 5 is 1600kN so as to simulate the pile filling of a second layer of soil body; monitoring the vertical displacement of each load plate by using displacement acquisition equipment 12 so as to obtain a foundation soil surface settlement line during the second-layer soil stacking period;
s6: judging that N is not equal to N, enabling N to be equal to 3, repeating the simulation process, simulating the third layer of filling load, and keeping the vertical stress 240kN on the first load plate 5 and the vertical stress 160kN on the tenth load plate 5 unchanged from left to right; the vertical stress 480kN on the second load plate 5 and the vertical stress 320kN on the ninth load plate 5 remain unchanged; vertical stress of 720kN is applied to the third to fifth load plates 5 through adjusting a lever loading system, vertical stress of 480kN is applied to the sixth to eighth load plates 5, and the sum of the vertical stress added values of the third to eighth load plates 5 is 1200kN so as to simulate the pile filling of a third layer of soil body; monitoring the vertical displacement of each load plate by using displacement acquisition equipment 12 so as to obtain a foundation soil surface settlement line during the stacking and filling of the third layer of soil;
s7: judging that N is not established, enabling N to be 4, repeating the simulation process, simulating the fourth layer of filling load, and keeping the vertical stress 240kN on the first load plate 5 and the vertical stress 160kN on the tenth load plate 5 unchanged from left to right; the vertical stress 480kN on the second load plate 5 and the vertical stress 320kN on the ninth load plate 5 remain unchanged; the vertical stress on the third load plate 5 of 720kN and the vertical stress on the eighth load plate 5 of 480kN remain unchanged; vertical stress 960kN is applied to the fourth load plate and the fifth load plate 5 through adjusting a lever loading system, vertical stress 640kN is applied to the sixth load plate and the seventh load plate 5, the sum of the vertical stress added values of the fourth load plate to the seventh load plate 5 is 800kN, and the pile filling of a fourth layer of soil body is simulated; monitoring the vertical displacement of each load plate by using displacement acquisition equipment 12 so as to obtain a foundation soil surface settlement line during the stacking and filling of the fourth layer of soil;
s8: judging that N is not true, enabling N to be 5, repeating the simulation process, simulating the fifth layer soil filling load, and keeping the vertical stress 240kN on the first load plate 5 and the vertical stress 160kN on the tenth load plate 5 unchanged from left to right; the vertical stress 480kN on the second load plate 5 and the vertical stress 320kN on the ninth load plate 5 remain unchanged; the vertical stress on the third load plate 5 of 720kN and the vertical stress on the eighth load plate 5 of 480kN remain unchanged; the vertical stress 960kN on the fourth load plate 5 and the vertical stress 640kN on the seventh load plate 5 remain unchanged; applying a vertical stress of 1200kN to the fifth load plate 5 and applying a vertical stress of 800kN to the sixth load plate 5 by adjusting a lever loading system to ensure that the sum of the added values of the vertical stresses applied to the fifth load plate to the sixth load plate is 400kN so as to simulate the stacking of a fifth layer of soil body; monitoring the vertical displacement of each load plate by using displacement acquisition equipment 12 so as to obtain a foundation soil surface settlement line during the fifth-layer soil stacking period;
s9: and judging that N is true, and finishing soil pile filling simulation. And finally, completing the simulation of the five-layer soil filling process.
By the soil slope filling process simulation method, the simulation of the asymmetric bidirectional soil slope filling process is completed.
In addition, the platform of the soil slope can be simulated by additionally arranging the load plate 5 and applying pressure to a set value, so that the simulation of the filling process of the soil slopes with different shapes can be realized.
Further, when the change of the simulation load needs to be further refined, the number of the load plates 5 can be further increased, so that the load plates 5 are uniformly arranged in the width direction, the change of the simulation load along the arrangement direction of the load plates 5 is refined, and the simulation requirement is met. The greater the number of load plates 5, the more accurate the simulation result.
In S2, the width of the load plate 5 is determined based on the gradient of the earth slope analysis model. The smaller the width of the load plate 5, the larger the slope of the simulated soil slope.
Example two:
as shown in fig. 1 to 3 and 8, the device for simulating the earth slope filling process comprises a model box 8, a lever loading system, a counterforce system and a monitoring system;
the lever loading system comprises a lever sleeve group 1, a weight tray 3, weights 2, a force transmission rod 4 and a load plate 5;
the reaction system comprises a reaction beam 10, a vertical column 7 and a bottom plate 6;
the monitoring system comprises a displacement acquisition device 12 and a pressure acquisition device 13;
an opening is formed in the top of the model box 8, the upright post 7 is arranged on the outer side of the model box 8, and a foundation soil body 11 is arranged on the inner side of the model box 8; the bottom of the upright post 7 is fixedly connected with the bottom plate 6, and the top of the upright post 7 is fixedly connected with the counter-force beam 10; the load plate 5 is arranged above the foundation soil body 11, the bottom of the dowel bar 4 is connected with the load plate 5 through two branches, and the top of the dowel bar 4 is connected with the lever sleeve group 1; the middle fulcrum of the lever sleeve set 1 is connected to the counter-force beam 10, one side, away from the middle fulcrum, of the lever sleeve set 1 is connected with the weight tray 3, and the weights 2 are loaded on the weight tray 3; the middle of the dowel bar 4 is provided with the pressure acquisition equipment 13, and the load plate is provided with the displacement acquisition equipment 12.
In the present embodiment, the lever set 1 is composed of a first sub-lever 14, a second sub-lever 15, a third sub-lever 16, a fourth sub-lever 17, and a fifth sub-lever 18; the first sub-lever 14, the second sub-lever 15, the third sub-lever 16, the fourth sub-lever 17 and the fifth sub-lever 18 are all hollow-out levers; the first sub-lever 14, the second sub-lever 15, the third sub-lever 16, the fourth sub-lever 17 and the fifth sub-lever 18 are independent of each other.
Taking fig. 8 as an example, a slide rail 24 is arranged on the fifth sub-lever 18, the weight tray 3 is suspended on a slide bar 25, and the slide bar 25 is slidably connected with the slide rail 24. The first sub-lever 14, the second sub-lever 15, the third sub-lever 16 and the fourth sub-lever 17 are similar to the fifth sub-lever 18 shown in fig. 8 in structure, and are provided with slide rails 24, the weight tray 3 is suspended on the slide bars 25, and the slide bars 25 are slidably connected with the slide rails 24.
The soil slope filling process simulation device is explained based on the use method of the first embodiment.
On the basis of the soil slope filling process simulation method of the embodiment, the soil slope filling process simulation device of the embodiment is used for specifically simulating the filling process of the asymmetric bidirectional soil slope, and comprises the following steps:
s1: filling a foundation soil body 11 at the bottom of the model box 8; ten load plates 5 are horizontally arranged on a foundation soil body 11, and five load plates are respectively arranged on the left side and the right side of a stand column 7: the 5 width of five load boards in stand 7 left side is 0.12m, and the 5 width of five load boards in right side is 0.08m for it is 1 respectively to simulate 7 both sides slopes of stand: 4.8 and 1: 3.2 of the soil slope;
s2: moving a sliding strip 25 on a first sub-lever 14 on the left side of the upright post 7 to a position 0.6m away from a fulcrum of a lever set 1, moving a sliding strip 25 on a second sub-lever 15 on the left side of the upright post 7 to a position 0.768m away from the fulcrum of the lever set 1, moving a sliding strip 25 on a third sub-lever 16 on the left side of the upright post 7 to a position 0.72m away from the fulcrum of the lever set 1, moving a sliding strip 25 on a fourth sub-lever 17 on the left side of the upright post 7 to a position 0.427m away from the fulcrum of the lever set 1, and moving a sliding strip 25 on a fifth sub-lever 18 on the left side of the upright post 7 to a position 0.3m away from the fulcrum of the lever set 1; moving a sliding strip 25 on a first sub-lever 14 on the right side of the upright post 7 to a position 0.4m away from a fulcrum of a lever set 1, moving a sliding strip 25 on a second sub-lever 15 on the right side of the upright post 7 to a position 0.512m away from the fulcrum of the lever set 1, moving a sliding strip 25 on a third sub-lever 16 on the right side of the upright post 7 to a position 0.48m away from the fulcrum of the lever set 1, moving a sliding strip 25 on a fourth sub-lever 17 on the right side of the upright post 7 to a position 0.366m away from the fulcrum of the lever set 1, and moving a sliding strip 25 on a fifth sub-lever 18 on the right side of the upright post 7 to a position 0.2m away from the fulcrum of the lever set 1;
s3: hanging weights 2 with the total weight of 120kN on five levers on the left side of the upright post 7 respectively, hanging weights 2 with the total weight of 80kN on five levers on the right side of the upright post 7 respectively, so as to simulate the loading process of the filling load of the first layer of soil body, checking the accuracy of the applied amount of the filling load through a pressure acquisition device 13, and monitoring the vertical displacement of each load plate 5 through a displacement acquisition device 12, thereby obtaining the surface settlement line of the foundation soil body during the filling of the first layer of soil body;
s4: respectively adding weights 2 with the gross weight of 30kN on a second sub-lever 15, a third sub-lever 16, a fourth sub-lever 17 and a fifth sub-lever 18 on the left side of the upright post 7, respectively adding weights 2 with the gross weight of 20kN on the second sub-lever 15, the third sub-lever 16, the fourth sub-lever 17 and the fifth sub-lever 18 on the right side of the upright post 7, so as to simulate the loading process of the second layer of soil body stacking and filling load, checking the accuracy of the stacking and filling load through a pressure acquisition device 13, and monitoring the vertical displacement of each load plate 5 through a displacement acquisition device 12, thereby obtaining the surface settlement line of the foundation soil body during the stacking and filling of the second layer of soil body;
s5: respectively adding weights 2 with the gross suspended weight of 30kN on a third sub-lever 16, a fourth sub-lever 17 and a fifth sub-lever 18 on the left side of the upright post 7, respectively adding weights 2 with the gross suspended weight of 20kN on the third sub-lever 16, the fourth sub-lever 17 and the fifth sub-lever 18 on the right side of the upright post 7 to simulate the loading process of the third layer of soil pile filling load, checking the accuracy of the application amount of the pile filling load through a pressure acquisition device 13, and monitoring the vertical displacement of each load plate 5 through a displacement acquisition device 12, thereby obtaining the surface settlement line of the foundation soil during the pile filling of the third layer of soil;
s6: respectively adding weights 2 for hanging 30kN of total weight on a fourth sub-lever 17 and a fifth sub-lever 18 on the left side of the upright post 7, respectively adding weights 2 for hanging 20kN of total weight on the fourth sub-lever 17 and the fifth sub-lever 18 on the right side of the upright post 7, so as to simulate the loading process of the fourth layer of soil body stacking and filling load, checking the accuracy of the application amount of the stacking and filling load through a pressure acquisition device 13, and monitoring the vertical displacement of each load plate 5 through a displacement acquisition device 12, thereby obtaining the surface settlement line of the foundation soil body during the fourth layer of soil body stacking and filling;
s7: the weight 2 for suspending the total weight of 30kN is added on the fifth sub-lever 18 on the left side of the upright post 7, the weight 2 for suspending the total weight of 20kN is added on the fifth sub-lever 18 on the right side of the upright post 7 respectively, so as to simulate the loading process of the stacking and filling load of the fifth layer of soil body, check the accuracy of the application amount of the stacking and filling load through the pressure acquisition equipment 13, monitor the vertical displacement of each load plate 5 through the displacement acquisition equipment 12, and further obtain the surface settlement line of the foundation soil body during the stacking and filling of the fifth layer of soil body. And finally, completing the simulation of the five-layer soil filling process.
By the aid of the soil slope filling process simulation device, simulation of asymmetric bidirectional soil slope five-layer soil body filling processes is completed, independent loading and mutual noninterference of each layer of soil body filling processes are achieved, accuracy of loading amount of each layer of soil body filling load is checked in real time in an implementation process, and a surface settlement line of foundation soil bodies during each layer of soil body filling is obtained.
Wherein, load plate 5 can be connected with stand 7 through modes such as bolted connection, be convenient for change the load plate 5 of suitable width as required to realize the simulation of different soil slope slopes.
As a further scheme of this embodiment, scales are provided on the first sub-lever 14, the second sub-lever 15, the third sub-lever 16, the fourth sub-lever 17, and the fifth sub-lever 18, and the scales are uniformly distributed along the length direction of the middle hollow lever, so that the position of the weight tray 3 is conveniently determined, the pressure applied to the dowel bar is conveniently calculated, and meanwhile, whether the calculated value of the pressure on the dowel bar is consistent with the actual value is verified through the pressure collecting device 13.
The mass of the weight 2 can be increased or decreased, so that the pressure of the lever on the load plate 5 is adjusted, and different loads are simulated; the position of the weight 2 on the lever set can be changed, namely the position of the weight 2 on the first sub-lever 14, the second sub-lever 15, the third sub-lever 16, the fourth sub-lever 17 and the fifth sub-lever 18 can be changed, so that the pressure of the levers on the load plate 5 can be adjusted to simulate different loads.
Furthermore, two displacement acquisition devices 12 are symmetrically distributed on two sides of the dowel bar, so that the foundation soil body settlement test result is verified mutually.
Example three:
as shown in FIGS. 1 to 3, the present embodiment simulates the filling process of a symmetrical bidirectional soil slope, and the prototype of the soil slope to be filled is shown in FIG. 6,As shown in FIG. 7, the width of the bottom of the slope is 100m, the width of the top of the slope is 20m, the height of the slope is 10m, the length is 50m, the top and the bottom are equal, and the volume is 30000m3The volume weight of the filled soil is 20kN/m3The total weight of the soil slope is 600000kN, and the slopes on two sides are both 1: 4.
according to the method for simulating the filling of the soil slope, the width of all the load plates 5 on the two sides of the upright post 7 is set to be 0.1m, the implementation steps are similar, and only the vertical stress exerted on the load plates 5 is different; according to the soil slope filling simulation device in the second embodiment, the position of the sliding strip 25 on the sliding rail 24 is adjusted, the weight of the hanging weight 2 is changed, and the simulation of the symmetrical bidirectional soil slope filling process can be completed.
In addition, when the soil slope analysis model is a unidirectional soil slope, on the basis of the first embodiment, in S4-S9, only the 1 st to 5 th load plates 5 from left to right are applied with vertical stress; when the soil slope analysis model is an upright soil slope, the same vertical stress is applied to all the load plates 5.
It should be finally noted that the above only serves to illustrate the technical solution of the present invention, and not to limit the scope of the present invention, and that simple modifications or equivalent replacements performed by those skilled in the art to the technical solution of the present invention do not depart from the spirit and scope of the technical solution of the present invention.
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| CN113029780B (en) * | 2021-03-05 | 2024-04-30 | 浙江理工大学 | Method and device for simulating soil slope filling process |
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