Horizontal pressure applying system

Abstract

The utility model discloses a horizontal pressure applying system and belongs to the technical field of civil engineering. The horizontal pressure applying system comprises a plastic hard pipe, a drainage plate, a rubber hose, a rubber hose sealing bottom, a pressurizing branch pipe, a pressurizing main pipe, an air compressor, a sand filtering groove, a vacuumizing branch pipe, a vacuumizing main pipe, a vacuumizing machine, a plastic diaphragm, a low soil weir and air-closed pressing soil; one end of the rubber hose is communicated with the plastic hard pipe and is fixedly arranged with the plastic hard pipe, the other end of the rubber hose is fixedly provided with the rubber hose sealing bottom, the drainage plate is fixedly adhered to the outer side of the rubber hose, the pressurizing branch pipe is communicated with the plastic hard pipe and is fixedly arranged, and the pressurizing main pipe is communicated with the pressurizing branch pipe and is fixedly arranged. According to the horizontal pressure applying system, in the soft foundation treatment process, bidirectional pressure applying can be achieved, the pressure applying speed can be increased, the foundation treatment effect is good, and the consumed time is short.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering, and in particular relates to a horizontal pressure application system. Background Art

[0002] Soft soil has low bearing capacity and low shear strength. When a building or structure is built on a soft foundation, it often causes the foundation to lose strength and be squeezed out. Soft soil has very high compressibility and large settlement deformation. It often causes deformation or cracking of buildings due to foundation sinking. It may even lead to the destruction of buildings or structures, so it is necessary to treat the soft soil. At present, the most commonly used and most economical treatment methods are preloading and vacuum preloading. In order to shorten the preloading time, drainage boards or sandbags are usually inserted into the soft soil. These methods have been widely used in the treatment of soft soil foundations and have achieved good results. However, all the foundation treatment methods currently used in engineering, including preloading and vacuum preloading, have the following shortcomings. First, these methods only apply vertical pressure to the soft foundation, with poor treatment effect and long treatment time. Second, the loading rate of preloading is limited. If the loading rate is too fast, the insufficient bearing capacity of the soft soil will cause foundation damage, which will also lead to a long treatment time. Although the vacuum preloading method is not affected by the loading rate and will not cause foundation damage, the vertical pressure applied by vacuum preloading on the soft soil is limited. The theoretical maximum value is only 100kpa. In engineering practice, affected by various factors such as machinery, the vertical pressure applied to the soft soil is only about 80kpa. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a technical solution for a horizontal pressure application system.

[0004] The horizontal pressure system is characterized in that it is composed of a plastic hard pipe, a drainage board, a rubber hose, a rubber hose bottom seal, a concrete tree root pile, a pressure branch pipe, a pressure main pipe, an air compressor, a filter sand trough, a vacuum branch pipe, a vacuum main pipe, a vacuum machinery, a plastic diaphragm, a low earth weir, and air-tight compaction soil. It is characterized in that one end of the rubber hose is connected to the plastic hard pipe and fixedly arranged with the plastic hard pipe, the other end of the rubber hose is fixedly provided with a rubber hose bottom seal, the drainage board is fixedly bonded to the outside of the rubber hose, and the cross-sectional dimensions of the drainage board are 15 cm in width and 1 cm in thickness; when the rubber hose is not inflated, the pipe wall is fitted, the cross-section is rectangular, and the width is 16 cm; the pressure branch pipe is connected to the plastic hard pipe and fixedly arranged, the pressure main pipe is connected to the pressure branch pipe and fixedly arranged, and the pressure main pipe is connected to the air compressor and fixedly arranged.

[0005] The horizontal pressure application system is characterized in that: the concrete tree root pile is formed by pouring concrete in the expanded rubber hose after the soft foundation treatment is completed;

[0006] The horizontal pressure system is characterized in that: the filter sand trough is 40 cm wide, 30 cm deep, and its length is consistent with the length of the soft foundation to be treated; small holes are opened in the vacuum branch pipe at intervals of 10 cm, and the diameter of the small holes is 1 cm; the vacuum branch pipe is connected to the vacuum main pipe and fixedly arranged, and the vacuum main pipe is connected to the vacuum machine and fixedly arranged; low earth weirs are piled around the soft foundation to be treated; plastic diaphragms are laid on the soft soil to be treated, and after crossing the low earth weir, they are suppressed by air-tight suppression soil.

[0007] A combined soft foundation treatment method of a horizontal pressure system comprises the following steps:

[0008] 1) Tidy up the site, remove weeds and silt within the soft foundation area to make the site level;

[0009] 2) Use lime to mark the position of the drain board. The drain boards are arranged in a square with a center distance of 1.2m;

[0010] 3) Use machinery or manual labor to insert the drain board, rubber hose, and rubber hose bottom seal into the soft soil to the designed depth. Insertion of drain boards is a mature technology in engineering. The length of the drain board is determined by the designer based on the geological conditions and building load conditions. The upper end of the plastic hard pipe is flush with the ground, and the upper end of the plastic hard pipe is sealed with a plastic plug;

[0011] 4) After the drainage board, rubber hose and rubber hose bottom cover within the soft foundation to be treated are all inserted, remove the plastic plug sealing the upper end of the plastic hard pipe;

[0012] 5) Connect the pressure branch pipe to the plastic hard pipe and fix it, connect the pressure main pipe to the pressure branch pipe and fix it, and connect the pressure main pipe to the air compressor and fix it;

[0013] 6) Dig a filter sand trough along the direction of the pressure branch pipe and with the drainage board as the center;

[0014] 7) Fill the filter sand tank with fine sand;

[0015] 8) Lay the vacuum branch pipe on the filter sand tank, connect the vacuum branch pipe with the vacuum main pipe and fix it, connect the vacuum main pipe with the vacuum machine and fix it;

[0016] 9) Build low earth dams around the soft foundation area that needs to be treated;

[0017] 10) Lay plastic diaphragm on the soft foundation to be treated. After the plastic diaphragm crosses the low earth dam, it is suppressed by airtight suppression soil;

[0018] 11) Pour water on the plastic membrane to a depth of 10 cm;

[0019] 12) Turn on the vacuum pump to put the plastic diaphragm under a vacuum state. When the vacuum degree under the plastic diaphragm reaches negative 75kpa, that is, the soft soil ground is subjected to a vertical pressure of 75kpa, turn on the air compressor. After the high-pressure gas enters the rubber hose, the rubber hose expands radially outward, and the soft soil foundation is subjected to horizontal pressure. The air compressor pressure is maintained at 70% of the pre-built building base pressure. After seven days, the air compressor pressure increases to 120% of the pre-built building base pressure. Because of the vertical pre-compression pressure and vertical self-weight stress, the appropriate increase in horizontal stress will not cause foundation damage;

[0020] 13) When the ground settlement reaches the design requirement, the design requirement ground settlement is determined by the designer according to the geological conditions and the building load conditions. The vacuum pumping machine is turned off and the air compressor is started to remove the water on the plastic diaphragm, and the plastic diaphragm, the pressure branch pipe and the pressure main pipe, the vacuum branch pipe and the vacuum main pipe are cleared;

[0021] 14) Pour concrete into the expanded rubber hose through the upper opening of the plastic hard pipe. Due to the complex soil, the shape of the expanded rubber hose will also be uneven, and the poured concrete piles formed in the rubber hose will also be uneven. These tree root piles formed within the entire treatment range can increase the bearing capacity and overall stability of the foundation;

[0022] 16) Seven days later, the construction site was tidied up and the combined soft foundation treatment was completed.

[0023] The technical solution of a horizontal pressure system and a combined soft foundation treatment method provided by the design of the present invention has the beneficial effect that during the soft foundation treatment process, vertical pressure and horizontal pressure are simultaneously applied to the soft soil foundation. Because the horizontal self-weight stress of the soil layer is much smaller than the vertical self-weight stress of the soil layer, the horizontal pressure applied to the soil layer can more easily compact the soil layer. The technical solution of the present invention can realize bidirectional pressure application and increase the rate of pressure application, and the foundation treatment effect is good and the time is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the horizontal pressure application system of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection structure of the drainage board, plastic hard pipe and rubber hose of the present invention;

[0026] Figure 3 It is a cross-sectional schematic diagram of the drainage board and the rubber hose of the present invention when they are not inflated;

[0027] Figure 4 It is a cross-sectional schematic diagram of the drainage board and the rubber hose after the rubber hose of the present invention is expanded;

[0028] Figure 5 It is a schematic longitudinal section diagram of a concrete tree root pile of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the vacuum pumping system of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the combined soft foundation treatment system of the present invention;

[0031] Figure 8 It is a cross-sectional schematic diagram of the combined soft foundation treatment system of the present invention;

[0032] Fig. 9 It is a schematic diagram of the bidirectional force of the soft foundation of the present invention. DETAILED DESCRIPTION

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

[0034] As shown in the figure, a horizontal pressure system consists of a plastic hard pipe 1, a drainage board 2, a rubber hose 3, a rubber hose bottom seal 4, a concrete tree root pile 5, a pressure branch pipe 6, a pressure main pipe 7, an air compressor 8, a filter sand trough 9, a vacuum branch pipe 10, a vacuum main pipe 11, a vacuum machine 12, a plastic diaphragm 13, a low earth weir 14, and air-tight compaction soil 15. One end of the rubber hose 3 is connected to the plastic hard pipe 1 and fixedly arranged with the plastic hard pipe 1, and the other end of the rubber hose 3 is fixedly provided with a rubber hose bottom seal 4. The drainage board 2 is fixedly bonded to the outside of the rubber hose 3, and the cross-sectional dimensions of the drainage board 2 are 15 cm in width and 1 cm in thickness. When the rubber hose 3 is not inflated, the pipe wall fits, the cross-section is like a rectangle, and the width is 16 cm; the pressure branch pipe 6 is connected to the plastic hard pipe 1 and fixedly arranged, the pressure main pipe 7 is connected to the pressure branch pipe 6 and fixedly arranged, and the pressure main pipe 7 is connected to the air compressor 8 and fixedly arranged.

[0035] The concrete tree root pile 5 is formed by pouring concrete in the expanded rubber hose 3 after the soft foundation treatment is completed.

[0036] The filter sand trough 9 is 40 cm wide and 30 cm deep, and its length is consistent with the length of the soft foundation to be treated; the vacuum branch pipe 10 is provided with small holes at intervals of 10 cm, and the diameter of the small holes is 1 cm. The vacuum branch pipe 10 is connected and fixedly arranged with the vacuum main pipe 11, and the vacuum main pipe 11 is connected and fixedly arranged with the vacuum machine 12; the low earth weir 14 is piled around the soft foundation range to be treated; the plastic diaphragm 13 is laid on the soft soil to be treated, and after crossing the low earth weir 14, it is suppressed by the air-tight suppression soil 15.

[0037] A combined soft foundation treatment method using a horizontal pressure system includes the following steps:

[0038] 1) Tidy up the site, remove weeds and silt within the soft foundation area to make the site level;

[0039] 2) Use lime to mark the position of the drain board 2. The drain board 2 is arranged in a square with a center distance of 1.2m;

[0040] 3) Use machinery or manual labor to insert the drain board 2, rubber hose 3, and rubber hose bottom seal 4 into the soft soil to the designed depth. The drain board 2, rubber hose 3, and rubber hose bottom seal 4 are arranged together. The upper end of the plastic hard pipe 1 is flush with the ground. Use a plastic plug to seal the upper end of the plastic hard pipe 1.

[0041] 4) After the drainage board 2, rubber hose 3, and rubber hose bottom seal 4 are all inserted in the soft foundation area to be treated, remove the plastic plug sealing the upper end of the plastic hard pipe 1;

[0042] 5) Connect the pressure branch pipe 6 to the plastic hard pipe 1 and fix them, connect the pressure main pipe 7 to the pressure branch pipe 6 and fix them, and connect the pressure main pipe 7 to the air compressor 8 and fix them;

[0043] 6) Dig a filter sand tank 9 along the direction of the pressure branch pipe 6 and with the drainage board 2 as the center;

[0044] 7) Fill the filter sand tank 9 with fine sand;

[0045] 8) Lay the vacuum branch pipe 10 on the filter sand tank 9, connect the vacuum branch pipe 10 with the vacuum main pipe 11 and fix them, and connect the vacuum main pipe 11 with the vacuum machine 12 and fix them;

[0046] 9) Build low earth dams 14 around the soft foundation area that needs to be treated;

[0047] 10) A plastic diaphragm 13 is laid on the soft foundation to be treated. After the plastic diaphragm 13 crosses the low earth weir 14, it is suppressed by airtight suppression soil 15;

[0048] 11) Pour water on the plastic membrane 13 to a depth of 10 cm;

[0049] 12) Turn on the vacuum pump 12 to make the plastic diaphragm 13 in a vacuum state. When the vacuum degree under the plastic diaphragm 13 reaches negative 75 kPa, turn on the air compressor 8. The air compressor pressure is maintained at 70% of the base pressure of the pre-built building. After seven days, the air compressor pressure increases to 120% of the base pressure of the pre-built building.

[0050] 13) After the ground settlement reaches the design requirement, turn off the vacuum machine 12 and start the air compressor 8, remove the water on the plastic diaphragm 13, and clean the plastic diaphragm 13, the pressure branch pipe 6 and the pressure main pipe 7, the vacuum branch pipe 10 and the vacuum main pipe 11;

[0051] 14) pouring concrete into the expanded rubber hose 3 through the upper opening of the plastic hard pipe 1;

[0052] 16) Seven days later, the construction site was tidied up and the combined soft foundation treatment was completed.

[0053] The present invention is explained according to the embodiments, and its essence is: 1. horizontal pressure is used in the soft foundation treatment process; 2. horizontal pressure is not affected by the pressurization rate; 3. the combined soft foundation treatment method includes both the combination of vertical pressure and horizontal pressure and the combination of applying horizontal pressure and vacuum preloading; any soft foundation treatment method that applies non-vertical pressure and the combined soft foundation treatment method of applying vertical pressure and any non-vertical pressure fall within the protection scope of the present invention.

Claims

1. A horizontal pressure system, comprising a plastic hard pipe (1), a drainage board (2), a rubber hose (3), a rubber hose bottom cover (4), a concrete tree root pile (5), a pressure branch pipe (6), a pressure main pipe (7), an air compressor (8), a filter sand tank (9), a vacuum branch pipe (10), a vacuum main pipe (11), a vacuum machine (12), a plastic diaphragm (13), a low earth weir (14), and airtight pressure soil (15), characterized in that One end of the rubber hose (3) is connected to the plastic hard pipe (1) and fixedly arranged with the plastic hard pipe (1); the other end of the rubber hose (3) is fixedly arranged with a rubber hose bottom cover (4); the drainage plate (2) is fixedly bonded to the outside of the rubber hose (3); the pressure branch pipe (6) is connected to the plastic hard pipe (1) and fixedly arranged; the pressure main pipe (7) is connected to the pressure branch pipe (6) and fixedly arranged; and the pressure main pipe (7) is connected to the air compressor (8) and fixedly arranged.

2. A horizontal pressure system as claimed in claim 1, characterized in that: The concrete tree root pile (5) is formed by pouring concrete in the expanded rubber hose (3) after the soft foundation treatment is completed.

3. A horizontal pressure system as claimed in claim 1, characterized in that: The filter sand trough (9) has a width of 40 cm, a depth of 30 cm, and a length that is consistent with the length of the soft foundation range to be treated; the vacuum branch pipe (10) has small holes at intervals of 10 cm, and the diameter of the small holes is 1 cm. The vacuum branch pipe (10) is connected to the vacuum main pipe (11) and fixedly arranged, and the vacuum main pipe (11) is connected to the vacuum machine (12) and fixedly arranged; the low earth weir (14) is piled around the soft foundation range to be treated; the plastic diaphragm (13) is laid on the soft soil to be treated, and after crossing the low earth weir (14), it is suppressed by the air-tight suppression soil (15).

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