CN112575790A - Foundation pit frozen soil retaining wall device and freezing method - Google Patents
Foundation pit frozen soil retaining wall device and freezing method Download PDFInfo
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- CN112575790A CN112575790A CN202011397000.1A CN202011397000A CN112575790A CN 112575790 A CN112575790 A CN 112575790A CN 202011397000 A CN202011397000 A CN 202011397000A CN 112575790 A CN112575790 A CN 112575790A
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- foundation pit
- bevel gear
- soil
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- pipe
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/14—Restraining of underground water by damming or interrupting the passage of underground water by freezing the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
Abstract
The invention provides a foundation pit frozen soil retaining wall device, which belongs to the technical field of foundation pit retaining walls and comprises an installation component, a cooling component and a freezing component, wherein a support frame in the installation component is arranged on an installation box. The temperature sensor in the cooling assembly is installed in a foundation pit soil layer, the temperature sensor is in signal connection with the pump body, the evaporator is communicated with the pump body, the condenser is communicated with the evaporator, the compressor is communicated with the condenser, the cooling pump is communicated with the compressor, and the cooling tower is communicated with the cooling pump. A feeding pipe in the freezing assembly is communicated with the cooling tower, one end of a conveying pipe is communicated with the feeding pipe, the other end of the conveying pipe is communicated with a discharging pipe, the discharging pipe is communicated with the pump body, the freezing pipe is arranged on the conveying pipe, the freezing pipe is inserted into a soil layer of a foundation pit, and the feeding pipe, the conveying pipe and the discharging pipe are fixed on a supporting frame. The circulating refrigeration control technology is adopted in the foundation pit construction, pile driving and concrete pouring are not needed, the cost is low, the stability of the foundation pit is good, and the safety is high.
Description
Technical Field
The invention relates to the technical field of foundation pit retaining walls, in particular to a foundation pit frozen soil retaining wall device and a freezing method.
Background
The foundation pit supporting structure is mainly subjected to horizontal load, wherein the horizontal load comprises additional pressure such as water pressure, soil pressure, ground overload and the like. In the traditional support design method, the soil body around the foundation pit is regarded as load, and the soil pressure type is selected for design according to the displacement condition of the enclosure structure. The main supporting structure comprises row piles, underground continuous walls, inner support supports and anchor-pull support forms. In order to fully exert the self-supporting capability of the soil body around the foundation pit, people successively research new supporting structures, such as cement-soil retaining walls, soil nailing walls, spray anchor supports, artificial freezing supports and the like. Because China has wide territory and complicated geological conditions, when the foundation pit is supported, a corresponding supporting structure is required to be selected for enclosure according to actual conditions so as to ensure the safety and stability of the foundation pit.
With the continuous promotion of Sichuan-Tibet railway construction, the number of deep and large foundation pits of railway station houses in seasonal frozen soil areas is continuously increased. The foundation pit soil body in the seasonal frozen soil area has obvious frost heaving and thaw collapse phenomena, the influence of freeze thawing factors is not considered in the existing foundation pit supporting standard, and the supporting structure and the foundation pit may be deformed too much according to the existing standard in construction, so that the foundation pit can be unstable in serious conditions.
Disclosure of Invention
In order to make up for the defects, the invention provides a foundation pit frozen soil retaining wall device, aiming at solving the problem that the deformation of a supporting structure and a foundation pit is too large and the foundation pit is unstable in serious conditions due to construction according to the existing specifications.
The invention is realized by the following steps: the invention provides a foundation pit frozen soil retaining wall device which comprises an installation assembly, a cooling assembly and a freezing assembly, wherein the cooling assembly is used for cooling the freezing assembly, and the freezing assembly is used for freezing a foundation pit soil layer.
The mounting assembly comprises a mounting box and a support frame, and the support frame is arranged on the mounting box.
The cooling subassembly includes temperature sensor, the pump body, evaporimeter, condenser, compressor, cooling pump and cooling tower, temperature sensor installs in the foundation ditch soil horizon, temperature sensor with pump body signal connection, the evaporimeter with the pump body intercommunication, the condenser with the evaporimeter intercommunication, the compressor with the condenser intercommunication, the cooling pump with the compressor intercommunication, the cooling tower with the cooling pump intercommunication.
Freeze the subassembly and include inlet pipe, conveying pipeline, freeze pipe and discharging pipe, the inlet pipe with the cooling tower intercommunication, the one end of conveying pipeline with the inlet pipe intercommunication, the other end with the discharging pipe intercommunication, the discharging pipe with the pump body intercommunication, it is provided with a plurality of roots, a plurality of to freeze the even setting of pipe on the conveying pipeline, it inserts to freeze the pipe in the foundation ditch soil horizon, inlet pipe, conveying pipeline and discharging pipe are fixed on the support frame.
In one embodiment of the invention, the device further comprises a height adjusting assembly, the height adjusting assembly comprises a first screw rod, a first bevel gear, a second bevel gear, a rotating shaft, a third bevel gear, a fourth bevel gear, a second screw rod and a lifting frame, the first screw rod is rotatably mounted on the mounting box, the first bevel gear is fixedly mounted at one end of the first screw rod, the second bevel gear is in transmission connection with the first bevel gear, the rotating shaft is fixedly mounted on the second bevel gear, two ends of the rotating shaft are rotatably mounted on the mounting box, the third bevel gear is fixedly mounted on the rotating shaft, the fourth bevel gear is in transmission connection with the third bevel gear, the second screw rod is fixedly mounted on the fourth bevel gear, the lifting frame is in transmission connection with the second screw rod, the lifting frame is arranged inside the mounting box, the support frame is fixedly arranged on the lifting frame.
In one embodiment of the invention, a hand wheel is fixed at one end part of the first screw rod, which is far away from the first bevel gear, the hand wheel is arranged on the outer side of the mounting box, and a crank is fixed on the hand wheel.
In an embodiment of the invention, a locking nut is connected to the first lead screw in a transmission manner, the locking nut is arranged between the installation box and the hand wheel, and a wrench is fixed on the locking nut.
In one embodiment of the invention, a limiting block is fixed at one end part of the second screw rod, which is far away from the fourth bevel gear.
In an embodiment of the invention, the two sides of the lifting frame are both provided with limiting tables, the two sides of the installation box are both fixed with limiting plates, and the limiting plates can be abutted against the limiting tables.
In one embodiment of the invention, a fixing pile is fixed at the bottom end of the installation box and is inserted into the ground.
In one embodiment of the invention, lifting rings are fastened to both sides of the mounting box, which lifting rings are designed as a handling device.
In one embodiment of the invention, a support plate is rotatably connected to the rotating shaft, and the support plate is fixed inside the installation box.
The embodiment of the invention also provides a freezing method of the foundation pit frozen soil retaining wall device, which is carried out by utilizing the foundation pit frozen soil retaining wall device and comprises the following steps:
the method comprises the following steps: firstly, connecting a lifting tool and a lifting ring together, and then lifting the whole device into a foundation pit by using the lifting tool;
step two: after the position of the device in a foundation pit is adjusted, a fixing pile is inserted into the ground, then a hand is used for driving a hand wheel to rotate through a crank, the hand wheel drives a first screw rod to rotate, the first screw rod drives a first bevel gear to rotate, the first bevel gear rotates to drive a second bevel gear to rotate, the second bevel gear drives a rotating shaft to rotate, the rotating shaft rotates to drive a third bevel gear to rotate, the third bevel gear rotates to drive a fourth bevel gear to rotate, the fourth bevel gear drives a second screw rod to rotate, the second screw rod rotates to drive a lifting frame to move upwards along the second screw rod, and the lifting frame drives a freezing assembly to move upwards;
step three: after the height of the freezing assembly is adjusted, the freezing pipe is inserted into the foundation pit soil layer, and meanwhile, a temperature sensor is installed in the foundation pit soil layer;
step four: then, the temperature sensor is in signal connection with a pump body, an inlet of the pump body is communicated with a discharge pipe, an outlet of the pump body is communicated with an inlet of an evaporator, an outlet of the evaporator is communicated with an inlet of a condenser, an outlet of the condenser is communicated with an inlet of a compressor, an outlet of the compressor is communicated with an inlet of a cooling pump, an outlet of the cooling pump is communicated with an inlet of a cooling tower, and an outlet of the cooling tower is communicated with a feed pipe;
step five: the relation between the soil body freezing temperature and the soil body strength is that the soil body strength value in the soil layer around the foundation pit is obtained through the water content in the soil layer around the foundation pit and the soil bodies with different soil qualities and different freezing temperatures, the soil body strength value is the soil body freezing strength value, the temperature sensor controls the cooling assembly according to the size relation between the soil body strength value and the preset soil body strength value, and the cooling assembly freezes the soil layer around the foundation pit through controlling the temperature of the refrigerating fluid in the freezing assembly; when the soil strength value in the soil layer around the foundation pit is equal to or greater than the preset soil strength value, closing the cooling assembly arranged outside the soil layer; or when the soil body intensity value in the soil layer around the foundation pit is smaller than the preset soil body intensity value, the cooling assembly is started.
The invention has the beneficial effects that: when the foundation pit frozen soil retaining wall device is used, the temperature sensor is in signal connection with the pump body, the inlet of the pump body is communicated with the discharge pipe, the outlet of the pump body is communicated with the inlet of the evaporator, the outlet of the evaporator is communicated with the inlet of the condenser, the outlet of the condenser is communicated with the inlet of the compressor, the outlet of the compressor is communicated with the inlet of the cooling pump, the outlet of the cooling pump is communicated with the inlet of the cooling tower, the outlet of the cooling tower is communicated with the feed pipe, the feed pipe is communicated with the feed pipe and the discharge pipe, the freezing pipe is communicated with the feed pipe, and the freezing pipe is inserted into the foundation pit soil layer;
the relation between the soil body freezing temperature and the soil body strength is that the soil body strength value in the soil layer around the foundation pit is obtained through the water content in the soil layer around the foundation pit and the soil bodies with different soil qualities and different freezing temperatures, the soil body strength value is the soil body freezing strength value, the temperature sensor controls the cooling assembly according to the size relation between the soil body strength value and the preset soil body strength value, and the cooling assembly freezes the soil layer around the foundation pit through controlling the temperature of the refrigerating fluid in the freezing assembly;
when the soil strength value in the soil layer around the foundation pit is equal to or greater than the preset soil strength value, closing the cooling assembly arranged outside the soil layer; or when the soil strength value in the soil layer around the foundation pit is smaller than the preset soil strength value, starting the cooling assembly;
the foundation pit construction adopts the refrigeration control technique of circulation, need not pile and cast concrete, and frozen soil barricade curtain stagnant water need not to draw water and reduces the ground water level, not only saves a large amount of foundation pit barricade consumptive materials and groundwater, and foundation pit frozen soil barricade device need not precipitation, has avoided the influence to peripheral building and underground buried pipeline because of precipitation, compares campshed and stock barricade structure moreover and practices thrift the cost, and foundation pit stability is good simultaneously, and the security is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a cooling assembly according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a height adjustment assembly according to an embodiment of the present invention;
FIG. 4 is an enlarged view taken at A of FIG. 3 according to the present invention;
FIG. 5 is an enlarged view of FIG. 3 at B in the present invention;
fig. 6 is a schematic view of an external structure of an installation box according to an embodiment of the present invention.
In the figure: 100-mounting the assembly; 110-an installation box; 111-a limiting plate; 112-a support plate; 113-fixing the pile; 114-a lifting ring; 120-a support frame; 200-a temperature reduction assembly; 210-a temperature sensor; 220-a pump body; 230-an evaporator; 240-a condenser; 250-a compressor; 260-a cooling pump; 270-a cooling tower; 300-freezing the assembly; 310-a feed pipe; 320-a conveying pipeline; 330-freezing tube; 340-a discharge pipe; 400-a height adjustment assembly; 410-a first lead screw; 411-hand wheel; 4111-a crank; 412-a lock nut; 4121-a wrench; 420-a first bevel gear; 430-second bevel gear; 440-a spindle; 450-a third bevel gear; 460-a fourth bevel gear; 470-a second screw rod; 471-a limiting block; 480-a lifting frame; 481-limiting table.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1 and fig. 2, the present invention provides a technical solution: the utility model provides a foundation ditch frozen soil retaining wall device, includes installation component 100, cooling component 200 and freezes subassembly 300, wherein, cooling component 200 realizes freezing the cooling of subassembly 300, freezes subassembly 300 and realizes freezing the foundation ditch soil layer.
Referring to fig. 3 and 6, the mounting assembly 100 includes a mounting case 110 and a supporting frame 120, and the supporting frame 120 is disposed above the outer side of the mounting case 110. When specifically setting up, the bottom of install bin 110 is through welded fastening have spud pile 113, and spud pile 113 pegs graft in the ground, improves the fastness after the install bin 110 installs. Lifting rings 114 are screwed to both sides of the mounting box 110, and the lifting rings 114 are configured as a carrying device.
Referring to fig. 1 and 2, the cooling assembly 200 includes a temperature sensor 210, a pump body 220, an evaporator 230, a condenser 240, a compressor 250, a cooling pump 260 and a cooling tower 270, the temperature sensor 210 is installed in the soil layer of the foundation pit, the temperature sensor 210 is in signal connection with the pump body 220, the evaporator 230 is communicated with the pump body 220, the condenser 240 is communicated with the evaporator 230, the compressor 250 is communicated with the condenser 240, the cooling pump 260 is communicated with the compressor 250, and the cooling tower 270 is communicated with the cooling pump 260, so as to implement cooling treatment on the refrigerant liquid.
Referring to fig. 1 and 2, the freezing assembly 300 includes a feed pipe 310, a feed pipe 320, freezing pipes 330 and a discharge pipe 340, the feed pipe 310 is communicated with the cooling tower 270, one end of the feed pipe 320 is communicated with the feed pipe 310, the other end is communicated with the discharge pipe 340, the discharge pipe 340 is communicated with the pump body 220, the freezing pipes 330 are uniformly arranged on the feed pipe 320, the freezing pipes 330 are inserted into the soil layer of the foundation pit, the feed pipe 310, the feed pipe 320 and the discharge pipe 340 are fixed on the support frame 120, the freezing liquid enters the feed pipe 320 through the feed pipe 310, then enters the freezing pipes 330 from the feed pipe 320, and further the freezing pipes 330 freeze the soil layer of the foundation pit, and then the freezing liquid flows out of the discharge pipe 340 and enters the cooling assembly 200 for cooling, and is sequentially and circularly performed.
Referring to fig. 3, 4 and 5, in addition, in an embodiment of the present invention, a height adjustment assembly 400 is further included, the height adjustment assembly 400 includes a first lead screw 410, a first bevel gear 420, a second bevel gear 430, a rotating shaft 440, a third bevel gear 450, a fourth bevel gear 460, a second lead screw 470 and a lifting frame 480, the first lead screw 410 is rotatably installed on the wall of the installation box 110, the first bevel gear 420 is fixedly installed on one end of the first lead screw 410 through a key, the second bevel gear 430 is in meshing transmission connection with the first bevel gear 420, the rotating shaft 440 is fixedly installed on the second bevel gear 430 through a key, two ends of the rotating shaft 440 are rotatably installed on the wall of the installation box 110, the third bevel gear 450 is fixedly installed on the rotating shaft 440 through a key, the fourth bevel gear 460 is in meshing transmission connection with the third bevel gear 450, the second lead screw 470 is fixedly installed on the fourth bevel gear 460 through a key, the lifting frame, the lifting frame 480 is arranged above the inner part of the installation box 110, and the support frame 120 is fixedly arranged on the lifting frame 480 through bolts, so that the height of the lifting frame 480 is adjusted.
Referring to fig. 3, fig. 4 and fig. 5, in a specific arrangement, in an embodiment of the present invention, a hand wheel 411 is fixed to an end portion of the first lead screw 410 away from the first bevel gear 420 through a bolt, the hand wheel 411 is arranged on an outer side of the installation box 110, a crank 4111 is fixed to the hand wheel 411 through a bolt, the hand wheel 411 is driven to rotate by a hand through the crank 4111, and the hand wheel 411 drives the first lead screw 410 to rotate, so that strength is saved, and operation is facilitated. Specifically, a locking nut 412 is connected to the first lead screw 410 in a threaded transmission mode, the locking nut 412 is arranged between the installation box 110 and the hand wheel 411, a wrench 4121 is fixed to the locking nut 412, the locking nut 412 can be conveniently pulled by a hand through the wrench 4121 to rotate, locking and unlocking of the locking nut 412 and the first lead screw 410 are achieved, and strength is saved. The rotating shaft 440 is rotatably connected with a supporting plate 112, the supporting plate 112 is fixed inside the installation box 110, the rotating shaft 440 is supported, and the stability of the rotating shaft 440 is improved.
Referring to fig. 3, 4 and 5, in an embodiment of the present invention, a limiting block 471 is fixed by welding at an end of the second lead screw 470 far from the fourth bevel gear 460, so as to prevent the lifting frame 480 from separating from the second lead screw 470 when moving upwards, so as to limit and protect the lifting frame. In addition, both sides of the lifting frame 480 are provided with limiting platforms 481, both sides of the installation box 110 are fixed with limiting plates 111 through bolts, the limiting plates 111 can be abutted against the limiting platforms 481, the lifting frame 480 is prevented from leaving the installation box 110 when moving upwards, and limiting and protecting effects are achieved.
The embodiment of the invention also provides a freezing method of the foundation pit frozen soil retaining wall device, which is carried out by utilizing the foundation pit frozen soil retaining wall device and comprises the following steps:
the method comprises the following steps: firstly, connecting a lifting tool with a lifting ring 114, and then lifting the whole device into a foundation pit by using the lifting tool;
step two: after the position of the device in a foundation pit is adjusted, a fixing pile 113 is inserted into the ground, then a hand is used for driving a hand wheel 411 to rotate through a crank 4111, the hand wheel 411 drives a first screw rod 410 to rotate, the first screw rod 410 drives a first bevel gear 420 to rotate, the rotation of the first bevel gear 420 drives a second bevel gear 430 to rotate, the second bevel gear 430 drives a rotating shaft 440 to rotate, the rotation of the rotating shaft 440 drives a third bevel gear 450 to rotate, the rotation of the third bevel gear 450 drives a fourth bevel gear 460 to rotate, the fourth bevel gear 460 drives a second screw rod 470 to rotate, the rotation of the second screw rod 470 drives a lifting frame 480 to move upwards along the second screw rod 470, and the lifting frame 480 drives a freezing assembly 300 to move upwards;
step three: after the height of the freezing assembly 300 is adjusted, the freezing pipe 330 is inserted into the foundation pit soil layer, and meanwhile, the temperature sensor 210 is installed in the foundation pit soil layer;
step four: then the temperature sensor 210 is in signal connection with the pump body 220, the inlet of the pump body 220 is communicated with the discharge pipe 340, the outlet of the pump body 220 is communicated with the inlet of the evaporator 230, the outlet of the evaporator 230 is communicated with the inlet of the condenser 240, the outlet of the condenser 240 is communicated with the inlet of the compressor 250, the outlet of the compressor 250 is communicated with the inlet of the cooling pump 260, the outlet of the cooling pump 260 is communicated with the inlet of the cooling tower 270, and the outlet of the cooling tower 270 is communicated with the feed pipe 310;
step five: the relation between the soil body freezing temperature and the soil body strength is that the soil body strength value in the soil layer around the foundation pit is obtained through the water content in the soil layer around the foundation pit and the soil bodies with different soil qualities and different freezing temperatures, the soil body strength value is the soil body freezing strength value, the temperature sensor 210 controls the cooling component 200 according to the size relation between the soil body strength value and the preset soil body strength value, and the cooling component 200 freezes the soil layer around the foundation pit through controlling the temperature of the refrigerating fluid in the freezing component 300; when the soil strength value in the soil layer around the foundation pit is equal to or greater than the preset soil strength value, closing the cooling component 200 arranged outside the soil layer; or when the soil strength value in the soil layer around the foundation pit is smaller than the preset soil strength value, the cooling component 200 is started.
Specifically, this foundation ditch frozen soil barricade device's theory of operation: firstly, connecting a lifting tool with a lifting ring 114, and then lifting the whole device into a foundation pit by using the lifting tool;
after the position of the device in a foundation pit is adjusted, a fixing pile 113 is inserted into the ground, then a hand is used for driving a hand wheel 411 to rotate through a crank 4111, the hand wheel 411 drives a first screw rod 410 to rotate, the first screw rod 410 drives a first bevel gear 420 to rotate, the rotation of the first bevel gear 420 drives a second bevel gear 430 to rotate, the second bevel gear 430 drives a rotating shaft 440 to rotate, the rotation of the rotating shaft 440 drives a third bevel gear 450 to rotate, the rotation of the third bevel gear 450 drives a fourth bevel gear 460 to rotate, the fourth bevel gear 460 drives a second screw rod 470 to rotate, the rotation of the second screw rod 470 drives a lifting frame 480 to move upwards along the second screw rod 470, and the lifting frame 480 drives a freezing assembly 300 to move upwards;
after the height of the freezing assembly 300 is adjusted, the freezing pipe 330 is inserted into the foundation pit soil layer, and meanwhile, the temperature sensor 210 is installed in the foundation pit soil layer;
then the temperature sensor 210 is in signal connection with the pump body 220, the inlet of the pump body 220 is communicated with the discharge pipe 340, the outlet of the pump body 220 is communicated with the inlet of the evaporator 230, the outlet of the evaporator 230 is communicated with the inlet of the condenser 240, the outlet of the condenser 240 is communicated with the inlet of the compressor 250, the outlet of the compressor 250 is communicated with the inlet of the cooling pump 260, the outlet of the cooling pump 260 is communicated with the inlet of the cooling tower 270, and the outlet of the cooling tower 270 is communicated with the feed pipe 310;
the relation between the soil body freezing temperature and the soil body strength is that the soil body strength value in the soil layer around the foundation pit is obtained through the water content in the soil layer around the foundation pit and the soil bodies with different soil qualities and different freezing temperatures, the soil body strength value is the soil body freezing strength value, the temperature sensor 210 controls the cooling component 200 according to the size relation between the soil body strength value and the preset soil body strength value, and the cooling component 200 freezes the soil layer around the foundation pit through controlling the temperature of the refrigerating fluid in the freezing component 300; when the soil strength value in the soil layer around the foundation pit is equal to or greater than the preset soil strength value, closing the cooling component 200 arranged outside the soil layer; or when the soil strength value in the soil layer around the foundation pit is smaller than the preset soil strength value, the cooling component 200 is started.
It should be noted that the specific model specifications of the temperature sensor 210, the pump body 220, the evaporator 230, the condenser 240, the compressor 250, and the cooling pump 260 need to be determined by model selection according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, and therefore detailed description is omitted.
The power supply of the temperature sensor 210, the pump body 220, the evaporator 230, the condenser 240, the compressor 250 and the cooling pump 260 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A foundation pit frozen soil retaining wall device is characterized by comprising
A mounting assembly (100), the mounting assembly (100) comprising a mounting case (110) and a support bracket (120), the support bracket (120) being disposed on the mounting case (110);
the cooling assembly (200) comprises a temperature sensor (210), a pump body (220), an evaporator (230), a condenser (240), a compressor (250), a cooling pump (260) and a cooling tower (270), wherein the temperature sensor (210) is installed in a foundation pit soil layer, the temperature sensor (210) is in signal connection with the pump body (220), the evaporator (230) is communicated with the pump body (220), the condenser (240) is communicated with the evaporator (230), the compressor (250) is communicated with the condenser (240), the cooling pump (260) is communicated with the compressor (250), and the cooling tower (270) is communicated with the cooling pump (260);
freeze subassembly (300), freeze subassembly (300) including inlet pipe (310), conveying pipeline (320), freeze pipe (330) and discharging pipe (340), inlet pipe (310) with cooling tower (270) intercommunication, the one end of conveying pipeline (320) with inlet pipe (310) intercommunication, the other end with discharging pipe (340) intercommunication, discharging pipe (340) with the pump body (220) intercommunication, it is provided with a plurality of roots to freeze pipe (330) freezes the even setting of pipe (330) and is in on conveying pipeline (320), it inserts to freeze pipe (330) in the foundation ditch soil horizon, inlet pipe (310), conveying pipeline (320) and discharging pipe (340) are fixed on support frame (120).
2. The foundation pit frozen soil retaining wall device according to claim 1, further comprising a height adjusting assembly (400), wherein the height adjusting assembly (400) comprises a first screw rod (410), a first bevel gear (420), a second bevel gear (430), a rotating shaft (440), a third bevel gear (450), a fourth bevel gear (460), a second screw rod (470) and a lifting frame (480), the first screw rod (410) is rotatably installed on the installation box (110), the first bevel gear (420) is fixedly installed at one end of the first screw rod (410), the second bevel gear (430) is in transmission connection with the first bevel gear (420), the rotating shaft (440) is fixedly installed on the second bevel gear (430), two ends of the rotating shaft (440) are rotatably installed on the installation box (110), the third bevel gear (450) is fixedly installed on the rotating shaft (440), the fourth bevel gear (460) is in transmission connection with the third bevel gear (450), the second lead screw (470) is fixedly installed on the fourth bevel gear (460), the lifting frame (480) is in transmission connection with the second lead screw (470), the lifting frame (480) is arranged inside the installation box (110), and the supporting frame (120) is fixedly installed on the lifting frame (480).
3. The foundation pit frozen soil retaining wall device according to claim 2, wherein a hand wheel (411) is fixed to one end of the first screw rod (410) far away from the first bevel gear (420), the hand wheel (411) is arranged on the outer side of the installation box (110), and a crank (4111) is fixed to the hand wheel (411).
4. A foundation pit frozen soil retaining wall device according to claim 3, wherein a locking nut (412) is drivingly connected to the first lead screw (410), the locking nut (412) is arranged between the mounting box (110) and the hand wheel (411), and a wrench (4121) is fixed on the locking nut (412).
5. The foundation pit frozen soil retaining wall device according to claim 2, wherein a limiting block (471) is fixed at one end of the second screw rod (470) far away from the fourth bevel gear (460).
6. The foundation pit frozen soil retaining wall device according to claim 2, wherein both sides of the lifting frame (480) are provided with limit platforms (481), both sides of the installation box (110) are fixed with limit plates (111), and the limit plates (111) can be abutted against the limit platforms (481).
7. A foundation pit frozen soil retaining wall device according to claim 1, wherein the bottom end of the installation box (110) is fixed with a fixing pile (113), and the fixing pile (113) is inserted into the ground.
8. A foundation pit frozen earth retaining wall device according to claim 1, wherein lifting rings (114) are fixed on both sides of the installation box (110), and the lifting rings (114) are configured as a carrying device.
9. A foundation pit frozen soil retaining wall device according to claim 2, wherein a support plate (112) is rotatably connected to said rotary shaft (440), and said support plate (112) is fixed inside said installation box (110).
10. A method for freezing a foundation pit frozen earth retaining wall device by using the foundation pit frozen earth retaining wall device according to any one of claims 1 to 9, comprising the steps of:
the method comprises the following steps: firstly, connecting a lifting tool and a lifting ring together, and then lifting the whole device into a foundation pit by using the lifting tool;
step two: after the position of the device in a foundation pit is adjusted, a fixing pile is inserted into the ground, then a hand is used for driving a hand wheel to rotate through a crank, the hand wheel drives a first screw rod to rotate, the first screw rod drives a first bevel gear to rotate, the first bevel gear rotates to drive a second bevel gear to rotate, the second bevel gear drives a rotating shaft to rotate, the rotating shaft rotates to drive a third bevel gear to rotate, the third bevel gear rotates to drive a fourth bevel gear to rotate, the fourth bevel gear drives a second screw rod to rotate, the second screw rod rotates to drive a lifting frame to move upwards along the second screw rod, and the lifting frame drives a freezing assembly to move upwards;
step three: after the height of the freezing assembly is adjusted, the freezing pipe is inserted into the foundation pit soil layer, and meanwhile, a temperature sensor is installed in the foundation pit soil layer;
step four: then, the temperature sensor is in signal connection with a pump body, an inlet of the pump body is communicated with a discharge pipe, an outlet of the pump body is communicated with an inlet of an evaporator, an outlet of the evaporator is communicated with an inlet of a condenser, an outlet of the condenser is communicated with an inlet of a compressor, an outlet of the compressor is communicated with an inlet of a cooling pump, an outlet of the cooling pump is communicated with an inlet of a cooling tower, and an outlet of the cooling tower is communicated with a feed pipe;
step five: the relation between the soil body freezing temperature and the soil body strength is that the soil body strength value in the soil layer around the foundation pit is obtained through the water content in the soil layer around the foundation pit and the soil bodies with different soil qualities and different freezing temperatures, the soil body strength value is the soil body freezing strength value, the temperature sensor controls the cooling assembly according to the size relation between the soil body strength value and the preset soil body strength value, and the cooling assembly freezes the soil layer around the foundation pit through controlling the temperature of the refrigerating fluid in the freezing assembly; when the soil strength value in the soil layer around the foundation pit is equal to or greater than the preset soil strength value, closing the cooling assembly arranged outside the soil layer; or when the soil body intensity value in the soil layer around the foundation pit is smaller than the preset soil body intensity value, the cooling assembly is started.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113513029A (en) * | 2021-05-11 | 2021-10-19 | 中煤光华地质工程有限公司 | Freezing support device and construction method |
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| CN105908696A (en) * | 2016-06-03 | 2016-08-31 | 长春工程学院 | Foundation pit frozen soil retaining wall device and freezing method thereof |
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| CN105908696A (en) * | 2016-06-03 | 2016-08-31 | 长春工程学院 | Foundation pit frozen soil retaining wall device and freezing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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