Structure for consolidating and reinforcing soft foundation through solar heat and operation mode of structure

Abstract

The invention discloses a structure for consolidating and reinforcing a soft foundation through solar heat and an operation mode of the structure. The structure comprises a soft foundation drainage consolidation system, a solar heating system, a vacuum pressure system, a water filling pipe bag load increasing structure, a stacking structure and a foundation soil layer. The lower part of the soft foundation drainage consolidation system is inserted into the foundation soil layer, and the upper part of the soft foundation drainage consolidation system is arranged on the top surface of the foundation soil layer; the solar heating system and the vacuum pressure system are respectively connected with the soft foundation drainage consolidation system; the stacking structure and the water filling pipe bag load increasing structure are sequentially arranged on the upper portion of the soft foundation drainage consolidation system from bottom to top, the vacuum pressure system is arranged on the top face of the stacking structure, and the solar heating system is arranged on the top face of the foundation soil layer. The deep soft foundation is reinforced through combination of the drainage wall, a common drainage plate and solar thermal consolidation, the reinforcing effect is good, and the method is economical.

Description

Technical Field

[0001] The invention relates to a deep mud soft soil foundation reinforcement technology, and in particular to a structure and an operation mode thereof that utilizes solar energy thermal consolidation to reinforce a soft soil foundation. Background Art

[0002] With the rapid development of social economy, my country's coastal areas have put forward higher requirements for high-quality social and economic development. The traditional common drainage board reinforcement technology for soft foundation has gradually become prominent due to its poor deep reinforcement effect, easy siltation, insufficient drainage consolidation and large post-construction settlement. Problems such as these have gradually emerged, leading to the gradual loss of advantages. Even if secondary drainage board reinforcement or drainage board dense layout reinforcement is adopted, the common drainage board will lose its drainage consolidation ability due to silt fine sticky particles silt clogging in the middle and late stages of consolidation. The fatal problem of unsatisfactory consolidation effect of deep silt soil is still difficult to solve.

[0003] Although there are technologies such as electroosmosis consolidation method and pressurized vacuum preloading at home and abroad, their deep reinforcement effect is still not good. Some scholars unilaterally exaggerate the reinforcement effect of technologies such as electroosmosis consolidation method and pressurized vacuum preloading. Therefore, the present invention adheres to the spirit of seeking truth from facts, and conducts in-depth research on how to significantly enhance the drainage and consolidation effect of deep silt soil in soft soil foundation under the condition of limited increase in drainage consolidation method cost. At the same time, it fully explores the high cost-effective technical advantages of drainage board reinforcement soft foundation technology, and proposes a spaced drainage wall and solar thermal consolidation soft foundation reinforcement technology, which fully utilizes the technical advantages of abundant solar energy resources in summer, greening and environmental protection, and low price. The technical characteristics of pore water viscosity decrease, fluidity enhancement and permeability increase after the temperature of silt soft soil increases are used, and the drainage consolidation of deep silt soil is accelerated in combination with the accelerated drainage mechanism under temperature gradient field. At the same time, the drainage wall technology is used to divide the deep silt soil foundation with poor permeability into square drainage units of moderate size, thereby accelerating the drainage and consolidation of the deep silt foundation. The present invention is an innovative enhanced and efficient new drainage and consolidation technology, and is intended to be applied in engineering practice, which is of great significance to the drainage and consolidation reinforcement treatment of soft foundations. Summary of the invention

[0004] One purpose of the present invention is to solve the deficiencies in the prior art and to provide a structure for strengthening a soft foundation by using solar thermal consolidation.

[0005] The above-mentioned object of the present invention is achieved by the following technical solutions:

[0006] A structure for reinforcing a soft foundation by using solar thermal consolidation comprises a soft foundation drainage consolidation system, a solar heating system, a vacuum pressure system, a water-filled pipe bag loading structure, a heap loading structure and a foundation soil layer; the lower part of the soft foundation drainage consolidation system is inserted into the foundation soil layer, and the upper part is arranged on the top surface of the foundation soil layer; the solar heating system and the vacuum pressure system are respectively connected to the soft foundation drainage consolidation system; the heap loading structure and the water-filled pipe bag loading structure are arranged in sequence from bottom to top on the upper part of the soft foundation drainage consolidation system, the vacuum pressure system is arranged on the top surface of the heap loading structure, and the solar heating system is arranged on the top surface of the foundation soil layer.

[0007] Furthermore, the soft foundation drainage consolidation system includes an oversized prefabricated drainage wall, an anti-clogging drainage board, an oversized board connector, a geotextile cushion layer, a horizontal vacuum tube, a non-woven fabric protective layer, a vacuum sealing membrane, a sealing ditch and an under-membrane heating connection line; the oversized prefabricated drainage walls are arranged at intervals to form a drainage wall, the oversized prefabricated drainage wall divides the foundation soil layer into a square grid, the anti-clogging drainage boards are evenly arranged at equal intervals in the foundation soil layer inside the square grid divided by the oversized prefabricated drainage wall, the oversized prefabricated drainage wall is connected to the horizontal vacuum tube through the oversized board connector, and the anti-clogging drainage board is connected to the vacuum pressure system The system is wound and connected, the geotextile cushion layer is arranged on the top surface of the foundation soil layer, the super-large prefabricated drainage wall and the anti-clogging drainage board penetrate the geotextile cushion layer and are connected to the horizontal vacuum tube respectively, the super-large prefabricated drainage wall is connected to the solar heating system through the sub-membrane heating connection line, the non-woven fabric protective layer covers the super-large prefabricated drainage wall, the anti-clogging drainage board, the super-large board connector, the geotextile cushion layer, the horizontal vacuum tube, the sub-membrane heating connection line and the upper part of the foundation soil layer, the vacuum sealing film covers the non-woven fabric protective layer, and the non-woven fabric protective layer and the vacuum sealing film are buried in the foundation soil layer through sealing grooves around them to seal and seal;

[0008] The solar heating system includes solar panels, an energy storage and conversion center, connecting wires, a supporting structure, and a control switch; the solar panels are arranged on the upper part of the foundation soil layer through the supporting structure, and the solar panels are connected to the energy storage and conversion center through connecting wires; the energy storage and conversion center is connected to the sub-membrane heating connecting wire through the control switch and connecting wires, and heats the super-large prefabricated drainage wall and the foundation soil layer;

[0009] The vacuum pressure system includes a vacuum pump system, a vacuum connecting pipe and a vacuum pipe connector; the vacuum pump system is connected to the horizontal vacuum pipe through the vacuum connecting pipe and the vacuum pipe connector in sequence; the vacuum pump system, the vacuum connecting pipe and the vacuum pipe connector are all arranged on the top surface of the stacking structure;

[0010] The water-filled pipe bag loading structure includes a geotextile water-filled pipe bag, filling water, a water inlet valve and a water discharge valve; the filling water is filled into the geotextile water-filled pipe bag through the water inlet valve, and the water discharge valve is arranged at the bottom side of the geotextile water-filled pipe bag; the geotextile water-filled pipe bag, filling water, a water inlet valve and a water discharge valve are all arranged on the top surface of the loading structure;

[0011] The stacking structure comprises a bottom protection cushion layer and a stacking carrier; the bottom protection cushion layer is arranged on the top surface of the vacuum sealing film to play a protective role, and the bottom protection cushion layer and the stacking carrier are arranged in sequence from bottom to top on the top surface of the foundation soil layer;

[0012] The foundation soil layer includes a soft soil layer to be reinforced and a hard soil layer; the hard soil layer is located at the bottom of the soft soil layer to be reinforced, and the super-large prefabricated drainage wall and the anti-clogging drainage board vertically penetrate the soft soil layer to be reinforced from top to bottom and are connected to the hard soil layer; the geotextile cushion layer, the horizontal vacuum tube, the super-large plate connector, the under-membrane heating connecting line, the non-woven fabric protective layer and the vacuum sealing membrane are arranged in sequence from bottom to top on the top surface of the soft soil layer to be reinforced.

[0013] Furthermore, the super-large prefabricated drainage wall comprises a super-large drainage wall anti-silt filter cloth, a super-large drainage wall core plate, capillary drainage tooth grooves, a drainage wall cavity, a drainage wall heating wire and a drainage wall connecting hole; the super-large drainage wall anti-silt filter cloth is wrapped around the outer side of the super-large drainage wall core plate and is glued and connected thereto, the capillary drainage tooth grooves are evenly arranged on the outer walls around the super-large drainage wall core plate, the drainage wall cavity is arranged at intervals inside the super-large drainage wall core plate, the drainage wall heating wires are respectively arranged inside the drainage wall cavities on both sides, and the capillary drainage tooth grooves are connected to the drainage wall cavity through the drainage wall connecting holes arranged at intervals; the super-large drainage wall anti-silt filter cloth and the super-large drainage wall core plate are arranged inside the foundation soil layer;

[0014] The anti-siltation drainage board includes an anti-siltation drainage board filter cloth, a drainage core plate, a drainage groove, a vacuum transfer main hole and a vacuum transfer branch hole; the anti-siltation drainage board filter cloth is wrapped around the outer side of the drainage core plate and glued to it, the drainage grooves are evenly arranged on the outer walls around the drainage core plate, the vacuum transfer main hole is arranged inside the drainage core plate, the drainage grooves are connected to the vacuum transfer main hole through the vacuum transfer branch holes arranged at intervals, and the anti-siltation drainage board filter cloth and the drainage core plate are arranged inside the foundation soil layer.

[0015] Furthermore, the soft foundation drainage consolidation system, solar heating system, vacuum pressure system, water-filled pipe bag loading structure and stacking structure are all provided with more than two.

[0016] Another object of the present invention is to provide an operating mode for a structure that utilizes solar thermal consolidation to reinforce a soft foundation.

[0017] The above-mentioned object of the present invention is achieved by the following technical solutions:

[0018] An operation mode of a structure using solar thermal consolidation to strengthen soft foundation includes the following three modes:

[0019] (1) Continuous heating and consolidation mode: In the summer when solar energy resources are abundant, this mode uses solar panels to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage and conversion center, so that the control switch is continuously in the on state, and the drainage wall heating wire in the super-large prefabricated drainage wall is continuously heated through the sub-membrane heating connection line. The heat can be transferred to the foundation soil inside the square grid divided by the super-large prefabricated drainage wall, thereby heating the foundation soil, so that the super-static pore water in the foundation is vertically discharged through the super-large prefabricated drainage wall and the anti-clogging drainage board, thereby draining and consolidating the deep soft soil layer to be reinforced and making it more compact.

[0020] (2) Intermittent heating consolidation mode: During the rainy season or the season with relatively less sunny weather, this mode uses solar panels to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage and conversion center, so that the control switch is continuously in a periodic on-state, thereby periodically heating the foundation soil layer, so that the super-static pore water in the foundation soil layer is vertically discharged through the super-large prefabricated drainage wall and the anti-clogging drainage board, thereby draining and consolidating the deep soft soil layer to be reinforced and becoming more compact.

[0021] (3) Temperature gradient field thermal consolidation mode: When the drainage and consolidation of the deep soft soil layer to be reinforced is in the consolidation fatigue period, this mode uses solar panels to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage and conversion center, so that the control switch is in an alternately open and closed state according to the block, so that the super-large prefabricated drainage wall is in a hot and cold alternating state, thereby forming a stable gradient field in the foundation soil. By utilizing the electrical polarity of water molecules, the ultra-static pore water in the foundation is driven by the temperature gradient field to be discharged vertically through the super-large prefabricated drainage wall and the anti-clogging drainage board, thereby draining and consolidating the deep soft soil layer to be reinforced and making it more compact.

[0022] The beneficial effects of the present invention are:

[0023] (1) The load generated by the pressure difference formed by vacuuming will not cause shear stress in the soil, and the foundation will not suffer from external instability failure. The load can be applied quickly at one time without the need for graded loading, and the reinforcement speed is fast. During the reinforcement process, in addition to vertical compression, the soil is also accompanied by a lateral tightening effect toward the center of the reinforcement area. The density of the soil after reinforcement is higher than that of the preload, and the effect of treating deep soft foundation is better.

[0024] (2) The construction process, machinery and equipment are simple, with low energy consumption, especially the use of abundant, environmentally friendly and cheap solar energy and water loads, with high operating efficiency. The reinforcement cost is lower than the three-axis cement mixing method, high-pressure spraying pile method and rigid pile foundation reinforcement method, and is suitable for large-scale soft soil foundation reinforcement.

[0025] (3) The present invention utilizes the technical characteristics of decreased viscosity, enhanced fluidity and increased permeability of pore water after the temperature of silt soft soil increases, combined with the accelerated drainage mechanism under the temperature gradient field to accelerate the drainage and consolidation of deep silt soil, which basically solves the problems of traditional ordinary drainage board reinforcement technology due to its poor deep reinforcement effect, easy clogging, insufficient drainage and consolidation and large post-construction settlement.

[0026] (4) The present invention adopts drainage wall technology to divide the deep mud foundation with poor permeability into square drainage units of appropriate size, thereby accelerating the drainage and consolidation of the deep mud foundation. At the same time, it has multiple heating modes such as continuous heating consolidation mode, intermittent heating consolidation mode and temperature gradient field thermal consolidation mode, which is of great significance to the drainage consolidation and reinforcement treatment of soft foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an elevation view of the structure of the present invention;

[0028] Figure 2 is an AA cross-sectional view of the structure of the present invention;

[0029] Figure 3 yes Figure 1 A local large-scale drawing;

[0030] Figure 4 Typical structural drawing of the super-large prefabricated drainage wall of the present invention;

[0031] Figure 5 Structural diagram of the anti-clogging drainage board of the present invention.

[0032] In the figure: 1-soft foundation drainage consolidation system; 11-super large prefabricated drainage wall; 12-anti-clogging drainage board; 13-super large board connector; 14-geotextile cushion layer; 15-horizontal vacuum tube; 16-non-woven protective layer; 17-vacuum sealing membrane; 18-sealing groove; 19-under-membrane heating connection line; 111-super large drainage wall anti-clogging filter cloth; 112-super large drainage wall core board; 113-capillary drainage tooth groove; 114-drainage wall cavity; 115-drainage wall heating wire; 116-drainage wall connecting hole; 121-anti-clogging drainage board filter cloth; 122-drainage core board; 123-drainage trough; 12 4-main hole for vacuum transmission; 125-branch hole for vacuum transmission; 2-solar heating system; 21-solar panel; 22-energy storage and conversion center; 23-connecting line; 24-support structure; 25-control switch; 3-vacuum pressure system; 31-vacuum pump system; 32-vacuum connecting pipe; 33-vacuum pipe connector; 4-water-filled pipe bag loading structure; 41-geotextile water-filled pipe bag; 42-filling water; 43-water inlet valve; 44-drainage valve; 5-loading structure; 51-bottom protection cushion layer; 52-loading carrier; 6-foundation soil layer; 61-soft soil layer to be reinforced; 62-hard soil layer. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] like Figures 1 to 5 As shown, the present invention is a structure for reinforcing a soft foundation by using solar thermal consolidation, comprising a soft foundation drainage consolidation system 1, a solar heating system 2, a vacuum pressure system 3, a water-filled pipe bag loading structure 4, a loading structure 5 and foundation soil 6; the lower part of the soft foundation drainage consolidation system 1 is inserted into the foundation soil layer 6, and the upper part is arranged on the top surface of the foundation soil layer 6; the solar heating system 2 and the vacuum pressure system 3 are respectively connected to the soft foundation drainage consolidation system 1; the loading structure 5 and the water-filled pipe bag loading structure 4 are arranged in sequence from bottom to top on the upper part of the soft foundation drainage consolidation system 1, the vacuum pressure system 3 is arranged on the top surface of the loading structure 5, and the solar heating system 2 is arranged on the top surface of the foundation soil layer 6.

[0035] The soft foundation drainage consolidation system 1 is composed of an extra-large prefabricated drainage wall 11, an anti-clogging drainage board 12, an extra-large board connector 13, a geotextile cushion layer 14, a horizontal vacuum tube 15, a non-woven fabric protective layer 16, a vacuum sealing membrane 17, a sealing ditch 18 and an under-membrane heating connection line 19; the extra-large prefabricated drainage walls 11 are arranged at intervals to form a drainage wall, the extra-large prefabricated drainage wall 11 divides the foundation soil layer 6 into a square grid, the anti-clogging drainage boards 12 are evenly arranged at equal intervals in the foundation soil layer 6 inside the square grid divided by the extra-large prefabricated drainage wall 11, the extra-large prefabricated drainage wall 11 is connected to the horizontal vacuum tube 15 through the extra-large board connector 13, and the anti-clogging drainage board 12 is wound and connected to the vacuum pressure system 3 The geotextile cushion layer 14 is arranged on the top surface of the foundation soil layer 6, the super-large prefabricated drainage wall 11 and the anti-clogging drainage board 12 penetrate the geotextile cushion layer 14 and are connected to the horizontal vacuum tube 15 respectively, the super-large prefabricated drainage wall 11 is connected to the solar heating system 2 through the sub-membrane heating connecting line 19, the non-woven protective layer 16 covers the super-large prefabricated drainage wall 11, the anti-clogging drainage board 12, the super-large board connecting piece 13, the geotextile cushion layer 14, the horizontal vacuum tube 15, the sub-membrane heating connecting line 19 and the upper part of the foundation soil layer 6, the vacuum sealing film 17 covers the non-woven protective layer 16, and the non-woven protective layer 16 and the vacuum sealing film 17 are buried in the foundation soil layer 6 through the sealing groove 18 around them to seal and seal.

[0036] The solar heating system 2 consists of a solar panel 21, an energy storage and conversion center 22, a connecting line 23, a supporting structure 24 and a control switch 25; the solar panel 21 is arranged on the upper part of the foundation soil layer 6 through the supporting structure 24, and the solar panel 21 is connected to the energy storage and conversion center 22 through the connecting line 23; the energy storage and conversion center 22 is connected to the sub-membrane heating connecting line 19 through the control switch 25 and the connecting line 23 to heat the super-large prefabricated drainage wall 11 and the foundation soil layer 6.

[0037] The vacuum pressure system 3 is composed of a vacuum pump system 31, a vacuum connecting pipe 32 and a vacuum pipe connector 33; the vacuum pump system 31 is connected to the horizontal vacuum pipe 15 through the vacuum connecting pipe 32 and the vacuum pipe connector 33 in sequence; the vacuum pump system 31, the vacuum connecting pipe 32 and the vacuum pipe connector 33 are all arranged on the top surface of the loading structure 5.

[0038] The water-filled pipe bag loading structure 4 is composed of a geotextile water-filled pipe bag 41, filling water 42, an inlet valve 43 and a drain valve 44. The filling water 42 is filled into the geotextile water-filled pipe bag 41 through the inlet valve 43, and the drain valve 44 is arranged at the bottom side of the geotextile water-filled pipe bag 41; the geotextile water-filled pipe bag 41, filling water 42, the inlet valve 43 and the drain valve 44 are all arranged on the top surface of the loading structure 5.

[0039] The loading structure 5 is composed of a bottom protection cushion layer 51 and a loading carrier 52. The bottom protection cushion layer 51 is arranged on the top surface of the vacuum sealing film 17 for protection. The bottom protection cushion layer 51 and the loading carrier 52 are arranged in sequence from bottom to top on the top surface of the foundation soil layer 6. The loading carrier 52 can be made of crushed stone soil.

[0040] The foundation soil 6 is composed of a soft soil layer 61 to be reinforced and a hard soil layer 62. The hard soil layer 62 is located at the bottom of the soft soil layer 61 to be reinforced. The super-large prefabricated drainage wall 11 and the anti-clogging drainage board 12 vertically penetrate the soft soil layer 61 to be reinforced from top to bottom and are connected to the hard soil layer 62; the geotextile cushion layer 14, the horizontal vacuum tube 15, the super-large board connector 13, the sub-membrane heating connecting line 19, the non-woven fabric protective layer 16 and the vacuum sealing membrane 17 are arranged in sequence from bottom to top on the top surface of the soft soil layer 61 to be reinforced.

[0041] The super-large prefabricated drainage wall 11 is composed of a super-large drainage wall anti-silt filter cloth 111, a super-large drainage wall core plate 112, a capillary drainage tooth groove 113, a drainage wall cavity 114, a drainage wall heating wire 115 and a drainage wall connecting hole 116; the super-large drainage wall anti-silt filter cloth 111 is wrapped around the outer side of the super-large drainage wall core plate 112 and is glued and connected to it, the capillary drainage tooth groove 113 is evenly arranged on the outer wall around the super-large drainage wall core plate 112, the drainage wall cavity 114 is arranged at intervals inside the super-large drainage wall core plate 112, the drainage wall heating wire 115 is respectively arranged inside the drainage wall cavity 114 on both sides, and the capillary drainage tooth groove 113 is connected to the drainage wall cavity 114 through the drainage wall connecting holes 116 arranged at intervals; the super-large drainage wall anti-silt filter cloth 111 and the super-large drainage wall core plate 112 are arranged inside the foundation soil layer 6.

[0042] The anti-siltation drainage board 12 is composed of an anti-siltation drainage board filter cloth 121, a drainage core plate 122, a drainage groove 123, a vacuum transfer main hole 124 and a vacuum transfer branch hole 125. The anti-siltation drainage board filter cloth 121 is wrapped around the outer side of the drainage core plate 122 and is glued to it. The drainage grooves 123 are evenly arranged on the outer walls around the drainage core plate 122. The vacuum transfer main hole 124 is arranged inside the drainage core plate 122. The drainage grooves 123 are connected to the vacuum transfer main hole 124 through the vacuum transfer branch holes 125 arranged at intervals. The anti-siltation drainage board filter cloth 121 and the drainage core plate 122 are arranged inside the foundation soil layer 6.

[0043] The width of the super-large prefabricated drainage wall 11 is 30cm to 80cm, the thickness of the super-large prefabricated drainage wall 11 is 2cm to 8cm, and the intermediate spacing of the interval arrangement is generally 1.5 to 2.5 times the width of the super-large prefabricated drainage wall 11; the super-large drainage wall anti-siltation filter cloth 111 and the anti-siltation drainage board filter cloth 121 can be made of environmentally friendly non-woven fabric materials with good water immersion resistance and excellent water permeability.

[0044] The super-large drainage wall core board 112 and the drainage core board 122 can be made of ecological and environmentally friendly materials, such as resins, environmentally friendly chemicals, etc., or they can be made of commonly used polyethylene (PE), polypropylene (PP) and chemical organic materials in a suitable ratio, so that they have both the rigidity of polypropylene and the toughness of polyethylene.

[0045] The capillary drainage grooves 113 and the drainage grooves 123 are arranged at intervals of 3 mm to 5 mm, and the width and depth of the capillary drainage grooves 113 and the drainage grooves 123 are generally 3 mm to 5 mm.

[0046] There are more than two soft foundation drainage consolidation systems 1, solar heating systems 2, vacuum pressure systems 3, water-filled pipe bag loading structures 4 and stacking structures 5.

[0047] The present invention provides an operation mode of a structure for strengthening a soft foundation by solar thermal consolidation, including the following three typical modes:

[0048] (1) Continuous heating and consolidation mode: In the summer when solar energy resources are abundant, this mode uses the solar panel 21 to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage and conversion center 22, so that the control switch 25 is continuously in the on state, and the drainage wall heating wire 115 in the super-large prefabricated drainage wall 11 is continuously heated through the sub-membrane heating connection line 19. The heat can be transferred to the foundation soil layer 6 inside the square grid divided by the super-large prefabricated drainage wall 11, thereby heating the foundation soil layer 6, so that the super-static pore water in the foundation soil layer 6 is vertically discharged through the super-large prefabricated drainage wall 11 and the anti-clogging drainage board 12, so that the deep soft soil layer 61 to be reinforced is drained and consolidated to be more compact.

[0049] (2) Intermittent heating and consolidation mode: For the rainy season or the season with relatively less sunny weather, this mode uses the solar panel 21 to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage and conversion center 22, so that the control switch 25 is continuously in a periodic and intermittently connected state, thereby periodically and intermittently heating the foundation soil layer 6, so that the super-static pore water in the foundation soil layer 6 is vertically discharged through the super-large prefabricated drainage wall 11 and the anti-clogging drainage board 12, thereby draining and consolidating the deep soft soil layer 61 to be reinforced and becoming more compact.

[0050] (3) Temperature gradient field thermal consolidation mode: When the drainage and consolidation of the deep soft soil layer 61 to be reinforced is in the consolidation fatigue period, this mode uses the solar panel 21 to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage and conversion center 22, so that the control switch 25 is in an alternately open and closed state according to the block, so that the super-large prefabricated drainage wall 11 is in a hot and cold alternating state, so that a stable gradient field is formed in the foundation soil layer 6. By utilizing the electrical polarity of water molecules, the ultra-static pore water in the foundation is vertically discharged through the super-large prefabricated drainage wall 11 and the anti-clogging drainage board 12 respectively under the drive of the temperature gradient field, so that the deep soft soil layer 61 to be reinforced is drained and consolidated to be more compact.

[0051] The above embodiments are combined with the accompanying drawings to describe the present invention, but they should not be understood as limiting the scope of protection of the present invention. It should be pointed out that, for ordinary technicians in this field, several equivalent variations and non-creative improvements can be made without departing from the concept of the present invention, which all belong to the scope of protection of the present invention.

Claims

1. A structure for strengthening soft foundation by solar thermal consolidation, characterized in that: The invention comprises a soft foundation drainage consolidation system (1), a solar heating system (2), a vacuum pressure system (3), a water-filled pipe bag loading structure (4), a heap loading structure (5) and a foundation soil layer (6); the lower part of the soft foundation drainage consolidation system (1) is inserted into the foundation soil layer (6), and the upper part is arranged on the top surface of the foundation soil layer (6); the solar heating system (2) and the vacuum pressure system (3) are respectively connected to the soft foundation drainage consolidation system (1); the heap loading structure (5) and the water-filled pipe bag loading structure (4) are arranged in sequence from bottom to top on the upper part of the soft foundation drainage consolidation system (1), the vacuum pressure system (3) is arranged on the top surface of the heap loading structure (5), and the solar heating system (2) is arranged on the top surface of the foundation soil layer (6).

2. The structure for strengthening soft foundation by solar thermal consolidation according to claim 1, characterized in that: The soft foundation drainage consolidation system (1) comprises an oversized prefabricated drainage wall (11), an anti-clogging drainage board (12), an oversized board connector (13), a geotextile cushion layer (14), a horizontal vacuum tube (15), a non-woven fabric protective layer (16), a vacuum sealing membrane (17), a sealing groove (18) and an under-membrane heating connection line (19); the oversized prefabricated drainage walls (11) are arranged at intervals to form a drainage wall, the oversized prefabricated drainage wall (11) divides the foundation soil layer (6) into square grids, the anti-clogging drainage boards (12) are evenly arranged at equal intervals in the foundation soil layer (6) inside the square grids divided by the oversized prefabricated drainage wall (11), the oversized prefabricated drainage wall (11) is connected to the horizontal vacuum tube (15) through the oversized board connector (13), the anti-clogging drainage board (12) is wound and connected to the vacuum pressure system (3), and the soil The geotextile cushion layer (14) is arranged on the top surface of the foundation soil layer (6); the super-large prefabricated drainage wall (11) and the anti-clogging drainage board (12) respectively penetrate the geotextile cushion layer (14) and are connected to the horizontal vacuum tube (15); the super-large prefabricated drainage wall (11) is connected to the solar heating system (2) through the sub-membrane heating connection line (19); the non-woven fabric protective layer (16) covers the super-large prefabricated drainage wall (11), the anti-clogging drainage board (12), the super-large board connecting piece (13), the geotextile cushion layer (14), the horizontal vacuum tube (15), the sub-membrane heating connection line (19) and the upper part of the foundation soil layer (6); the vacuum sealing film (17) covers the non-woven fabric protective layer (16); the non-woven fabric protective layer (16) and the vacuum sealing film (17) are buried in the foundation soil layer (6) through the sealing groove (18) around them to seal the air; The solar heating system (2) comprises a solar panel (21), an energy storage conversion center (22), a connecting line (23), a supporting structure (24) and a control switch (25); the solar panel (21) is arranged on the upper part of the foundation soil layer (6) through the supporting structure (24), and the solar panel (21) is connected to the energy storage conversion center (22) through the connecting line (23); the energy storage conversion center (22) is connected to the sub-membrane heating connecting line (19) through the control switch (25) and the connecting line (23), and heats the super-large prefabricated drainage wall (11) and the foundation soil layer (6); The vacuum pressure system (3) comprises a vacuum pump system (31), a vacuum connecting pipe (32) and a vacuum pipe connector (33); the vacuum pump system (31) is connected to the horizontal vacuum pipe (15) in sequence through the vacuum connecting pipe (32) and the vacuum pipe connector (33); the vacuum pump system (31), the vacuum connecting pipe (32) and the vacuum pipe connector (33) are all arranged on the top surface of the stacking structure (5); The water-filled pipe bag loading structure (4) comprises a geotechnical water-filled pipe bag (41), filling water (42), a water inlet valve (43) and a water discharge valve (44); the filling water (42) is filled into the geotechnical water-filled pipe bag (41) through the water inlet valve (43), and the water discharge valve (44) is arranged at the bottom side of the geotechnical water-filled pipe bag (41); the geotechnical water-filled pipe bag (41), filling water (42), the water inlet valve (43) and the water discharge valve (44) are all arranged on the top surface of the loading structure (5); The stacking structure (5) comprises a bottom protection cushion layer (51) and a stacking carrier (52); the bottom protection cushion layer (51) is arranged on the top surface of the vacuum sealing film (17), and the bottom protection cushion layer (51) and the stacking carrier (52) are arranged in sequence from bottom to top on the top surface of the foundation soil layer (6); The foundation soil layer (6) comprises a soft soil layer (61) to be reinforced and a hard soil layer (62); the hard soil layer (62) is located at the bottom of the soft soil layer (61) to be reinforced, and the super-large prefabricated drainage wall (11) and the anti-clogging drainage board (12) vertically penetrate the soft soil layer (61) to be reinforced from top to bottom and are connected to the hard soil layer (62); the geotextile cushion layer (14), the horizontal vacuum tube (15), the super-large board connecting piece (13), the under-membrane heating connecting line (19), the non-woven fabric protective layer (16) and the vacuum sealing film (17) are arranged in sequence from bottom to top on the top surface of the soft soil layer (61) to be reinforced.

3. The structure for strengthening soft foundation by solar thermal consolidation according to claim 2, characterized in that: The super-large prefabricated drainage wall (11) comprises a super-large drainage wall anti-silt filter cloth (111), a super-large drainage wall core plate (112), capillary drainage tooth grooves (113), a drainage wall cavity (114), a drainage wall heating wire (115) and a drainage wall connecting hole (116); the super-large drainage wall anti-silt filter cloth (111) is wrapped around the outer side of the super-large drainage wall core plate (112) and is glued and connected thereto, and the capillary drainage tooth grooves (113) are evenly arranged on the super-large drainage wall core plate (11 2), drainage wall cavities (114) are arranged at intervals inside the super-large drainage wall core plate (112), drainage wall heating wires (115) are arranged inside the drainage wall cavities (114) located on both sides, and capillary drainage tooth grooves (113) are connected to the drainage wall cavities (114) through drainage wall connecting holes (116) arranged at intervals; the super-large drainage wall anti-silt filter cloth (111) and the super-large drainage wall core plate (112) are arranged inside the foundation soil layer (6); The anti-siltation drainage board (12) comprises an anti-siltation drainage board filter cloth (121), a drainage core plate (122), a drainage groove (123), a vacuum transmission main hole (124) and a vacuum transmission branch hole (125); the anti-siltation drainage board filter cloth (121) is wrapped around the outer side of the drainage core plate (122) and is adhesively connected thereto; the drainage grooves (123) are evenly arranged on the outer walls around the drainage core plate (122); the vacuum transmission main hole (124) is arranged inside the drainage core plate (122); the drainage grooves (123) are connected to the vacuum transmission main hole (124) through vacuum transmission branch holes (125) arranged at intervals; and the anti-siltation drainage board filter cloth (121) and the drainage core plate (122) are arranged inside the foundation soil layer (6).

4. The structure for strengthening soft foundation by solar thermal consolidation according to claim 1 or 2, characterized in that: The soft foundation drainage consolidation system (1), solar energy heating system (2), vacuum pressure system (3), water-filled pipe bag loading structure (4) and stacking structure (5) are all provided with more than two.

5. An operating mode of a structure for strengthening soft foundation by solar thermal consolidation according to claim 1, 2 or 3, characterized in that: Including the following three types: Continuous heating and consolidation mode: In the summer when solar energy resources are abundant, this mode uses the solar panel (21) to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage and conversion center (22), so that the control switch (25) is continuously in the on state, and the drainage wall heating wire (115) in the super-large prefabricated drainage wall (11) is continuously heated through the sub-membrane heating connection line (19), and the heat is transferred to the foundation soil layer (6) inside the square grid divided by the super-large prefabricated drainage wall (11), thereby heating the foundation soil layer (6), so that the super-static pore water in the foundation soil layer is vertically discharged through the super-large prefabricated drainage wall (11) and the anti-clogging drainage board (12), so that the deep soft soil layer (61) to be reinforced is drained, consolidated and compacted; Intermittent heating consolidation mode: For the rainy season or the season with relatively less sunny weather, this mode uses the solar panel (21) to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage conversion center (22), so that the control switch (25) is continuously in a periodic intermittently connected state, thereby periodically heating the foundation soil layer (6), so that the super-static pore water in the foundation soil layer (6) is vertically discharged through the super-large prefabricated drainage wall (11) and the anti-clogging drainage board (12), so that the deep soft soil layer (61) to be reinforced is drained and consolidated to be dense; Temperature gradient field thermal consolidation mode: When the drainage consolidation of the deep soft soil layer (61) to be reinforced is in the consolidation fatigue period, this mode uses the solar panel (21) to absorb solar energy and store it, and converts the energy into electrical energy and stores it in the energy storage conversion center (22), so that the control switch (25) is in an alternately open and closed state according to the block, thereby making the super-large prefabricated drainage wall (11) present a hot and cold alternating state, thereby forming a stable gradient field in the foundation soil layer (6), and using the electrical polarity of water molecules, the ultra-static pore water in the foundation soil layer (6) is driven by the temperature gradient field to be discharged vertically through the super-large prefabricated drainage wall (11) and the anti-clogging drainage board (12), thereby draining, consolidating and compacting the deep soft soil layer (61) to be reinforced.

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