A horizontal drainage system for consolidating soft foundation and construction method thereof

Abstract

The present invention specifically discloses a horizontal drainage system for consolidating soft foundations, including a plurality of vertical water collecting pipes, a plurality of four-way water guides, a plurality of horizontal drainage branches, a plurality of horizontal drainage main pipes and at least one water collecting well module; the vertical water collecting pipes collect groundwater of the soft foundation squeezed by the gravity stacking layer; the four-way water guides connect the vertical water collecting pipes with the drainage branch pipes; the horizontal drainage branch pipes guide the water collected by the vertical water collecting pipes to the horizontal drainage main pipe; the horizontal drainage main pipe guides the collected water to the water collecting well module; the water collecting well module is used to store the collected groundwater. The present invention further discloses a construction method for a horizontal drainage system for consolidating soft foundations, including the following steps: measuring marks; digging trenches and earth pits; installing water collecting well modules and horizontal drainage main pipes; laying vertical water collecting pipes; installing four-way water guides; installing horizontal drainage branches; and stacking the gravity stacking layer. The present invention has the advantages of high drainage efficiency and low construction cost.

Description

Technical Field

[0001] The invention relates to the technical field of soft foundation consolidation drainage, and in particular to a horizontal drainage system for consolidating a soft foundation and a construction method thereof. Background Art

[0002] The drainage consolidation method is often used in the consolidation process of soft foundation. The drainage consolidation method is to vertically implant a drainage (filtration) channel into the range of the soft foundation to be treated, and then pile up a certain elevation of the pile on top to squeeze the water in the soil and penetrate into the drainage (filtration) channel, and then be discharged from the horizontal sand cushion layer to achieve the purpose of stabilizing the soft foundation. Traditional drainage consolidation methods include vacuum preloading, pile loading preloading, and vacuum combined pile loading preloading. The principle is to pre-implant a plastic drainage board (belt) with a water-filtering function into the soft and plastic soil, and then pile up on the top of the soil. The water in the soil flows through the plastic drainage board into the interlayer between the pile and the soil - the sand cushion layer, and penetrates through the sand cushion layer to the blind ditch water collection well located in the sand cushion layer, thereby enhancing the bearing capacity of the soil and improving the stability of the soil. The traditional drainage consolidation method has many disadvantages: 1. A sand cushion layer must be used, but the construction cost is high due to the shortage of sand resources; 2. The sand cushion layer will cause secondary pollution due to cross-operation during the construction process. The originally clean sand is contaminated once after paving (pollutants include soil carried by mechanical equipment), and it is contaminated again when laying plastic drainage boards, which greatly reduces the permeability of the sand cushion layer; 3. The sand cushion layer is difficult to pave. Summary of the invention

[0003] In view of this, it is necessary to propose a horizontal drainage system and a construction method for consolidating soft foundations to address the above problems, so as to solve the shortcomings of the above background technology that drainage consolidation requires a sand cushion layer, has high construction costs and difficulty, and high material and equipment costs.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A horizontal drainage system for consolidating a soft foundation, the system is paved with a gravity stacking layer, the gravity stacking layer is used to squeeze the soft foundation, the system comprises a plurality of vertical water collecting pipes, a plurality of four-way water guides, a plurality of horizontal drainage branch pipes, a plurality of horizontal drainage main pipes and at least one water collecting well module; one end of each vertical water collecting pipe protrudes from the soft foundation surface, and the rest of each vertical water collecting pipe is vertically buried in the soft foundation; each four-way water guide is laid on the ground of the soft foundation; each horizontal drainage branch pipe is laid on the ground of the soft foundation; each horizontal drainage main pipe is laid in a groove excavated on the soft foundation surface corresponding to the horizontal drainage main pipe; each water collecting well module is arranged in a soil pit excavated on the soft foundation surface corresponding to the water collecting well module, and the bottom surface of each water collecting well module is lower than each horizontal drainage branch pipe and each horizontal drainage main pipe;

[0006] The four-way water guide is provided with two first water openings and two second water openings, the two first water openings of each four-way water guide are connected with one end of a vertical water collecting pipe protruding from the soft ground surface corresponding to the first water opening, and the other two second water openings are connected with one end of a horizontal drainage branch pipe corresponding to the second water opening; one end of one of the horizontal drainage main pipes is connected with the water collection well module or another horizontal drainage main pipe, and each water collection well module is connected with the end of at least one horizontal drainage main pipe; each second water opening is connected to a plurality of drainage branch pipes through the corresponding horizontal drainage branch pipes, and each drainage branch pipe is connected with the corresponding horizontal drainage main pipe, so as to form a drainage network that makes the accumulated water gather in the water collection well module;

[0007] The vertical water collecting pipe is used to collect groundwater from the soft foundation squeezed by the gravity pressure layer;

[0008] The four-way water guide is used to connect the vertical water collecting pipe and the drainage branch pipe;

[0009] The horizontal drainage branch pipe is used to guide the water collected by the vertical water collecting pipe to the horizontal drainage main pipe;

[0010] The horizontal drainage main pipe is used to direct the collected water to the water collection well module;

[0011] The water collection well module is used to store the collected groundwater.

[0012] Furthermore, the water collection well module is arranged at the center position of a cross or X-cross formed by four horizontal drainage main pipes.

[0013] Furthermore, the system also includes a water well extension pipe corresponding to the water collection well module one by one; one end of the water well extension pipe is located in the water collection well module, and the other end thereof passes through the gravity stacking layer.

[0014] Furthermore, the water collection well module includes a mesh metal cup-shaped frame as a water well frame and a geotextile used for wrapping the periphery of the mesh metal cup-shaped frame and filtering water.

[0015] Furthermore, an inverted U-shaped water collection unit is formed by a four-way water guide and two vertical water collection pipes connected to the four-way water guide.

[0016] Furthermore, the system comprises a plurality of inverted U-shaped water collection units, and the parts of each inverted U-shaped water collection unit on the soft ground surface are arranged in a distributed matrix within the region.

[0017] Furthermore, a plurality of first drainage branch pipes are arranged between the two horizontal drainage main pipes. The first drainage branch pipes are formed by connecting in series the adjacent four-way water-guiding parts arranged in a straight line through a plurality of horizontal drainage branch pipes. One end of the first drainage branch pipe is connected to one of the horizontal drainage main pipes, and the other end of the first drainage branch pipe is connected to the other horizontal drainage main pipe.

[0018] Furthermore, a plurality of second drainage branch pipes are arranged between the edge of the soft ground base surface and the horizontal drainage main pipe near the edge of the soft ground base surface, and the second drainage branch pipes are formed by connecting in series adjacent four-way water-guiding parts arranged in a C shape or a mirrored C shape through a plurality of horizontal drainage branch pipes; one end of the second drainage branch pipe is connected to an opening of the horizontal drainage main pipe near the edge of the soft ground base surface, and the other end thereof is connected to another opening of the horizontal drainage main pipe near the edge of the soft ground base surface.

[0019] Furthermore, the system also includes at least one water pump; the water suction port of the water pump is arranged in the water collection well module; the water pump is used to pump out the accumulated water in the water collection well module.

[0020] A construction method for a horizontal drainage system for consolidating a soft foundation as described above, the construction method comprising the following steps:

[0021] Step 1, measuring and marking on the ground of the soft foundation to determine the installation positions of the water collection well module, the horizontal drainage main pipe and the horizontal drainage branch pipe;

[0022] Step 2, digging trenches corresponding to each horizontal drainage main pipe and pits corresponding to each water collection well module;

[0023] Step 3, installing several water collection well modules in corresponding earth pits and several horizontal drainage main pipes in corresponding trenches, so that each horizontal drainage main pipe is interconnected through its own end or the corresponding water collection well module, and each water collection well module is connected with the end of at least one horizontal drainage main pipe;

[0024] Step 4, laying a plurality of vertical water collecting pipes in an array in the soft foundation, so that the ends of each vertical water collecting pipe protrude from the soft foundation surface, and the remaining parts of each vertical water collecting pipe are vertically buried in the soft foundation;

[0025] Step 5, installing a plurality of four-way water guides on the ground of the soft foundation, so that the ends of the vertical water collecting pipes protruding from the ground of the soft foundation are all connected to the corresponding four-way water guides;

[0026] Step 6, install several horizontal drainage branches on the ground of the soft foundation, so that each four-way water guide member forms several drainage branch pipes through the corresponding horizontal drainage branch pipes, and each drainage branch pipe is connected to the corresponding horizontal drainage main pipe, thereby forming a drainage network in which the accumulated water converges in the water collection well module;

[0027] Step 7: pile a gravity compaction layer on top of the soft foundation.

[0028] The beneficial effects of the present invention are:

[0029] The present invention does not use the sand cushion layer of the traditional consolidation soft foundation drainage system, so that the material and installation costs of the entire drainage system are reduced by more than 70%, and the consolidation drainage efficiency is greatly improved. In addition, the water collection well module for collecting soft foundation water is conducive to using a water pump for large flow drainage. The present invention has the advantages of environmental protection (saving resources), low cost, and short construction period (factory modular production, on-site installation). BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural principle diagram of a horizontal drainage system for consolidating soft foundation in Example 1 of the present invention;

[0031] Figure 2 is a three-dimensional schematic diagram of a four-way water guide member of the present invention;

[0032] Figure 3 It is a three-dimensional schematic diagram of the inverted U-shaped water collection unit of the present invention;

[0033] Figure 4 It is a schematic diagram of the top view of the structure of a horizontal drainage system for consolidating a soft foundation in Example 2 of the present invention;

[0034] Figure 5 for Figure 4 A partial schematic diagram in the AA viewing direction;

[0035] Figure 6 It is a schematic diagram of the top view of the structure of a horizontal drainage system for consolidating a soft foundation in Example 3 of the present invention;

[0036] Description of reference numerals:

[0037] Vertical water collecting pipe - 1; four-way water guide part - 2; horizontal drainage branch pipe - 3; horizontal drainage main pipe - 4; water collecting well module - 5; first water inlet - 21; second water inlet - 22; water pump - 6; water well extension pipe - 7; first horizontal drainage main pipe 41; second horizontal drainage main pipe 42. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further clearly and completely described in combination with the embodiments of the present invention. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", and "right" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0040] The terms "first", "second", "third", "fourth", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "second", "third", "fourth" features may explicitly or implicitly include one or more of the features.

[0041] Example 1

[0042] like Figure 1-3 As shown, a horizontal drainage system for consolidating a soft foundation is provided with a gravity stacking layer 200, and the gravity stacking layer 200 is used to squeeze the soft foundation 100. The system comprises a plurality of vertical water collecting pipes 1, a plurality of four-way water guides 2, a plurality of horizontal drainage branch pipes 3, a plurality of horizontal drainage main pipes 4 and at least one water collecting well module 5; one end of each vertical water collecting pipe 1 protrudes from the ground of the soft foundation 100, and the rest of each vertical water collecting pipe 1 is vertically buried in the soft foundation 100. Each four-way water guide 2 is laid on the ground of the soft foundation 100; each horizontal drainage branch pipe 3 is laid on the ground of the soft foundation 100; each horizontal drainage main pipe 4 is laid in a groove excavated on the ground of the soft foundation 100 and corresponding to the horizontal drainage main pipe 4; each water collection well module 5 is arranged in a pit excavated on the ground of the soft foundation 100 and corresponding to the water collection well module 5, and the bottom surface of each water collection well module 5 is lower than each horizontal drainage branch pipe 3 and each horizontal drainage main pipe 4;

[0043] The four-way water guide 2 is provided with two first water openings 21 and two second water openings 22. The two first water openings 21 of each four-way water guide 2 are connected to one end of the vertical water collecting pipe 1 protruding from the ground of the soft foundation 100 corresponding to the first water openings 21, and the other two second water openings 22 are connected to one end of the horizontal drainage branch pipe 3 corresponding to the second water openings 22; one end of the horizontal drainage main pipe 4 is connected to the water collecting well module 5 or another horizontal drainage main pipe 4, and each water collecting well module 5 is connected to the end of at least one horizontal drainage main pipe 4; each second water opening 22 is connected to a plurality of drainage branch pipes through the corresponding horizontal drainage branch pipe 3, and each drainage branch pipe is connected to the corresponding horizontal drainage main pipe 4, so as to form a drainage network for gathering the accumulated water in the water collecting well module 5;

[0044] The vertical water collecting pipe 1 is used to collect groundwater from the soft foundation 100 squeezed by the gravity stacking layer 200;

[0045] The four-way water guide 2 is used to connect the vertical water collecting pipe 1 with the drainage branch pipe;

[0046] The horizontal drainage branch pipe 3 is used to guide the water collected by the vertical water collecting pipe 1 to the horizontal drainage main pipe 4;

[0047] The horizontal drainage main pipe 4 is used to guide the collected water to the water collection well module 5;

[0048] The water collection well module 5 is used to store the collected groundwater.

[0049] Furthermore, the water collection well module 5 is arranged at the center position of a cross or X-cross formed by four horizontal drainage main pipes 4.

[0050] Furthermore, the system also includes a water well extension pipe 7 corresponding to the water collection well module 5 one by one; one end of the water well extension pipe 7 is located in the water collection well module 5, and the other end thereof passes through the gravity stacking layer 200.

[0051] Furthermore, the water collection well module 5 includes a mesh metal cup-shaped frame as a water well frame and a geotextile used for wrapping the periphery of the mesh metal cup-shaped frame and filtering water.

[0052] Furthermore, an inverted U-shaped water collection unit is formed by a four-way water guide member 2 and two vertical water collection pipes 1 connected to the four-way water guide member 2 .

[0053] Furthermore, the system includes a plurality of inverted U-shaped water collection units, and the portions of each inverted U-shaped water collection unit on the ground of the soft foundation 100 are arranged in a distributed matrix within the region.

[0054] Furthermore, a plurality of first drainage branch pipes are arranged between the two horizontal drainage main pipes 4. The first drainage branch pipes are formed by connecting in series the adjacent four-way water-guiding parts 2 arranged in a straight line through a plurality of horizontal drainage branch pipes 3. One end of the first drainage branch pipe is connected to one of the horizontal drainage main pipes 4, and the other end of the first drainage branch pipe is connected to the other horizontal drainage main pipe 4.

[0055] Furthermore, a plurality of second drainage branch pipes are arranged between the edge of the soft foundation 100 and the horizontal drainage main pipe 4 near the edge of the soft foundation 100. The second drainage branch pipes are formed by connecting in series the adjacent four-way water-conducting parts 2 arranged in a C shape or a mirrored C shape through a plurality of horizontal drainage branch pipes 3; one end of the second drainage branch pipe is connected to an opening of the horizontal drainage main pipe 4 near the edge of the soft foundation 100, and the other end thereof is connected to another opening of the horizontal drainage main pipe 4 near the edge of the soft foundation 100.

[0056] Furthermore, the system also includes at least one water pump 6 ; the water inlet of the water pump 6 is arranged in the water collection well module 5 ; the water pump 6 is used to pump out the accumulated water in the water collection well module 5 .

[0057] A construction method for a horizontal drainage system for consolidating a soft foundation as described above, the construction method comprising the following steps:

[0058] Step 1, measuring marks on the ground of the soft foundation 100, so as to determine the installation positions of the water collection well module 5, the horizontal drainage main pipe 4 and the horizontal drainage branch pipe 3; specifically, measuring marks by laying out lines;

[0059] Step 2, digging trenches corresponding to each horizontal drainage main pipe 4 and pits corresponding to each water collection well module 5; specifically, trenches 20-30 cm deep need to be excavated; specifically, trenches 20-30 cm deep need to be excavated;

[0060] Step 3, install several water collection well modules 5 in the corresponding earth pits and install several horizontal drainage main pipes 4 in the corresponding grooves, so that each horizontal drainage main pipe 4 is interconnected through its own end or the corresponding water collection well module 5, and each water collection well module 5 is connected with at least one end of the horizontal drainage main pipe 4; specifically, after the water collection well module 5 is manufactured and transported to the site, it is directly installed in the corresponding earth pit, and then gravel is filled around the water collection well module 5 to enhance water permeability; specifically, after the water collection well module is manufactured and transported to the site, it is directly installed in the corresponding earth pit, and then gravel is filled around the water collection well module to enhance water permeability;

[0061] Step 4, laying a plurality of vertical water collecting pipes 1 in an array in the soft foundation 100, so that the ends of each vertical water collecting pipe 1 protrude from the ground of the soft foundation 100, and the rest of each vertical water collecting pipe 1 is vertically buried in the soft foundation 100;

[0062] Step 5, installing a plurality of four-way water guides 2 on the ground of the soft foundation 100, so that the ends of the vertical water collecting pipes 1 protruding from the ground of the soft foundation 100 are all connected with the corresponding four-way water guides 2;

[0063] Step 6, install a plurality of horizontal drainage branch pipes 3 on the ground of the soft foundation 100, so that each four-way water guide 2 forms a plurality of drainage branch pipes through the corresponding horizontal drainage branch pipes 3, and each drainage branch pipe is connected to the corresponding horizontal drainage main pipe 4, so as to form a drainage network in which the accumulated water is gathered in the water collection well module 5; specifically, use the four-way water guide 2 to connect the vertical water collection pipe 1 and the horizontal drainage branch pipe 3, and the interface between the four-way water guide 2 and the vertical water collection pipe 1 and the interface between the four-way water guide 2 and the horizontal drainage branch pipe 3 are reinforced with wind nails to prevent falling off; specifically, use the four-way water guide to connect the vertical water collection pipe and the horizontal drainage branch pipe, and the interface between the four-way water guide and the vertical water collection pipe and the interface between the four-way water guide and the horizontal drainage branch pipe are reinforced with wind nails to prevent falling off;

[0064] Step 7: piling a gravity piling layer 200 on the soft foundation 100 .

[0065] Furthermore, the water collection well module 5 adopts a modular installation to facilitate construction and installation. The cement pipes and the water collection well base are prefabricated in the factory. The prefabricated parts are of standard size. The number of pipes is stacked according to the elevation requirements during on-site construction. When installing the water collection well module 5, the position of the water collection well module 5 is first measured and laid out, and then a pit is dug to a depth slightly greater than the height of the base of the water collection well module 5 to keep the top of the well seat at the same height as the top of the soil when the water collection well module 5 is buried in the soil. A section of cement pipe is stacked, and when the stacking height is the same as the top of the cement pipe, more cement pipes are stacked, and so on, until the stacking height is completed.

[0066] Example 2

[0067] Embodiment 2 is an embodiment further optimized on the basis of Embodiment 1;

[0068] like Figure 1-5As shown, a horizontal drainage system for consolidating a soft foundation is provided with a gravity stacking layer 200, and the gravity stacking layer 200 is used to squeeze the soft foundation 100. The system comprises a plurality of vertical water collecting pipes 1, a plurality of four-way water guides 2, a plurality of horizontal drainage branch pipes 3, a plurality of horizontal drainage main pipes 4 and at least one water collecting well module 5; one end of each vertical water collecting pipe 1 protrudes from the ground of the soft foundation 100, and the rest of each vertical water collecting pipe 1 is vertically buried in the soft foundation 100. Each four-way water guide 2 is laid on the ground of the soft foundation 100; each horizontal drainage branch pipe 3 is laid on the ground of the soft foundation 100; each horizontal drainage main pipe 4 is laid in a groove excavated on the ground of the soft foundation 100 and corresponding to the horizontal drainage main pipe 4; each water collection well module 5 is arranged in a pit excavated on the ground of the soft foundation 100 and corresponding to the water collection well module 5, and the bottom surface of each water collection well module 5 is lower than each horizontal drainage branch pipe 3 and each horizontal drainage main pipe 4;

[0069] The four-way water guide 2 is provided with two first water openings 21 and two second water openings 22. The two first water openings 21 of each four-way water guide 2 are connected to one end of the vertical water collecting pipe 1 protruding from the soft foundation 100 corresponding to the first water openings 21, and the other two second water openings 22 are connected to one end of the horizontal drainage branch pipe 3 corresponding to the second water openings 22; all horizontal drainage main pipes 4 are divided into two categories, one of which is the first horizontal drainage main pipe 41, and the other is the second horizontal drainage main pipe 42; the end of each or every two or every three or every four first horizontal drainage main pipes 41 is connected to the corresponding collection pipe 1. The water well modules 5 are connected, and each water collection well module 5 is connected to the end of at least one first horizontal drainage main pipe 41; the second horizontal drainage main pipe 42 is used to connect different first horizontal drainage main pipes 41, so that each horizontal drainage main pipe 4 connected to different water collection well modules 5 is further connected, so that the drainage is smoother, and the drainage system is prevented from being paralyzed due to the blockage of one or more horizontal drainage main pipes 4; each second water outlet 22 is connected to a plurality of drainage branch pipes through the corresponding horizontal drainage branch pipe 3, and each drainage branch pipe is connected to the corresponding horizontal drainage main pipe 4, so as to form a drainage network that makes the accumulated water gather in the water collection well module 5;

[0070] The vertical water collecting pipe 1 is used to collect groundwater from the soft foundation 100 squeezed by the gravity stacking layer 200;

[0071] The four-way water guide 2 is used to connect the vertical water collecting pipe 1 with the drainage branch pipe;

[0072] The horizontal drainage branch pipe 3 is used to guide the water collected by the vertical water collecting pipe 1 to the horizontal drainage main pipe 4;

[0073] The horizontal drainage main pipe 4 is used to guide the collected water to the water collection well module 5;

[0074] The water collection well module 5 is used to store the collected groundwater.

[0075] Example 3

[0076] Embodiment 3 is an embodiment further optimized on the basis of Embodiment 1;

[0077] like Figure 1-3 , Figure 6 As shown, a horizontal drainage system for consolidating a soft foundation is provided with a gravity stacking layer 200, and the gravity stacking layer 200 is used to squeeze the soft foundation 100. The system comprises a plurality of vertical water collecting pipes 1, a plurality of four-way water guides 2, a plurality of horizontal drainage branch pipes 3, a plurality of horizontal drainage main pipes 4 and at least one water collecting well module 5; one end of each vertical water collecting pipe 1 protrudes from the ground of the soft foundation 100, and the rest of each vertical water collecting pipe 1 is vertically buried in the soft foundation 100. Each four-way water guide 2 is laid on the ground of the soft foundation 100; each horizontal drainage branch pipe 3 is laid on the ground of the soft foundation 100; each horizontal drainage main pipe 4 is laid in a groove excavated on the ground of the soft foundation 100 and corresponding to the horizontal drainage main pipe 4; each water collection well module 5 is arranged in a pit excavated on the ground of the soft foundation 100 and corresponding to the water collection well module 5, and the bottom surface of each water collection well module 5 is lower than each horizontal drainage branch pipe 3 and each horizontal drainage main pipe 4;

[0078] The four-way water guide 2 is provided with two first water openings 21 and two second water openings 22. The two first water openings 21 of each four-way water guide 2 are connected to one end of the vertical water collecting pipe 1 protruding from the ground of the soft foundation 100 corresponding to the first water openings 21, and the other two second water openings 22 are connected to one end of the horizontal drainage branch pipe 3 corresponding to the second water openings 22; the end of each or every two or every three or every four horizontal drainage main pipes 4 is connected to the corresponding water collection well module 5, and each water collection well module 5 is connected to the end of at least one horizontal drainage main pipe 4; each second water opening 22 is connected to a plurality of drainage branch pipes through the corresponding horizontal drainage branch pipe 3, and each drainage branch pipe is connected to the corresponding horizontal drainage main pipe 4, so as to form a drainage network that makes the accumulated water converge in the water collection well module 5;

[0079] The vertical water collecting pipe 1 is used to collect groundwater from the soft foundation 100 squeezed by the gravity stacking layer 200;

[0080] The four-way water guide 2 is used to connect the vertical water collecting pipe 1 with the drainage branch pipe;

[0081] The horizontal drainage branch pipe 3 is used to guide the water collected by the vertical water collecting pipe 1 to the horizontal drainage main pipe 4;

[0082] The horizontal drainage main pipe 4 is used to guide the collected water to the water collection well module 5;

[0083] The water collection well module 5 is used to store the collected groundwater.

[0084] Working principle of the present invention:

[0085] The present invention implants a vertical water collecting pipe with a water filtering function into a soft foundation with soft flow plasticity, and then carries out a gravity loading layer on top of the soft foundation. The moisture in the soft foundation soil flows into the corresponding horizontal drainage main pipe through the vertical water collecting pipe and the drainage branch pipe composed of a plurality of horizontal drainage branch pipes and a plurality of four-way water guiding member drainage branch pipes, and the groundwater flows into the water collecting well module through the horizontal drainage main pipe. The accumulated water in the water collecting well module is pumped away by a water pump, thereby enhancing the bearing capacity of the soft foundation and improving the stability of the soft foundation.

[0086] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A construction method for a horizontal drainage system for consolidating a soft foundation, wherein a gravity stacking layer is laid on the horizontal drainage system for consolidating a soft foundation, and the gravity stacking layer is used to squeeze the soft foundation. The system comprises a plurality of vertical water collecting pipes, a plurality of four-way water guides, a plurality of horizontal drainage branch pipes, a plurality of horizontal drainage main pipes and at least one water collecting well module; one end of each vertical water collecting pipe protrudes from the soft foundation surface, and the rest of each vertical water collecting pipe is vertically buried in the soft foundation; each four-way water guide is laid on the ground of the soft foundation; each horizontal drainage branch pipe is laid on the ground of the soft foundation; each horizontal drainage main pipe is laid in a groove excavated on the soft foundation surface corresponding to the horizontal drainage main pipe; each water collecting well module is arranged in a soil pit excavated on the soft foundation surface corresponding to the water collecting well module, and the bottom surface of each water collecting well module is lower than each horizontal drainage branch pipe and each horizontal drainage main pipe; The four-way water guide is provided with two first water openings and two second water openings, the two first water openings of each four-way water guide are connected with one end of a vertical water collecting pipe protruding from the soft ground surface in a one-to-one correspondence with the first water opening, and the other two second water openings are connected with one end of a horizontal drainage branch pipe in a one-to-one correspondence with the second water opening; one end of one of the horizontal drainage main pipes is connected with the water collecting well module or another horizontal drainage main pipe, and each water collecting well module is connected with the end of at least one horizontal drainage main pipe; each second water opening is connected to a plurality of drainage branch pipes through the corresponding horizontal drainage branch pipes, and each drainage branch pipe is connected with the corresponding horizontal drainage main pipe, thereby forming a drainage network that makes the accumulated water gather in the water collecting well module; The vertical water collecting pipe is used to collect groundwater from the soft foundation squeezed by the gravity pressure layer; The four-way water guide is used to connect the vertical water collecting pipe and the drainage branch pipe; The horizontal drainage branch pipe is used to guide the water collected by the vertical water collecting pipe to the horizontal drainage main pipe; The horizontal drainage main pipe is used to direct the collected water to the water collection well module; The water collection well module is used to store the collected groundwater; it is characterized in that: The construction method comprises the following steps: Step 1, measuring and marking on the ground of the soft foundation to determine the installation positions of the water collection well module, the horizontal drainage main pipe and the horizontal drainage branch pipe; Step 2, digging trenches corresponding to each horizontal drainage main pipe and pits corresponding to each water collection well module; Step 3, installing several water collection well modules in corresponding earth pits and several horizontal drainage main pipes in corresponding trenches, so that each horizontal drainage main pipe is interconnected through its own end or the corresponding water collection well module, and each water collection well module is connected with the end of at least one horizontal drainage main pipe; Step 4, laying a plurality of vertical water collecting pipes in an array in the soft foundation, so that the ends of each vertical water collecting pipe protrude from the soft foundation surface, and the remaining parts of each vertical water collecting pipe are vertically buried in the soft foundation; Step 5, installing a plurality of four-way water guides on the ground of the soft foundation, so that the ends of the vertical water collecting pipes protruding from the ground of the soft foundation are all connected to the corresponding four-way water guides; Step 6, install several horizontal drainage branches on the ground of the soft foundation, so that each four-way water guide member forms several drainage branch pipes through the corresponding horizontal drainage branch pipes, and each drainage branch pipe is connected to the corresponding horizontal drainage main pipe, thereby forming a drainage network in which the accumulated water converges in the water collection well module; Step 7: pile a gravity compaction layer on top of the soft foundation.

2. The construction method of the horizontal drainage system for consolidating soft foundation according to claim 1, characterized in that: The water collection well module is arranged at the center position of a cross or X-cross formed by four horizontal drainage main pipes.

3. The construction method of the horizontal drainage system for consolidating soft foundation according to claim 1, characterized in that: The system also includes a water well extension pipe corresponding to the water collection well module one by one; one end of the water well extension pipe is located in the water collection well module, and the other end thereof passes through the gravity stacking layer.

4. The construction method of the horizontal drainage system for consolidating soft foundation according to claim 1, characterized in that: The water collection well module comprises a mesh metal cup-shaped frame as a water well frame and a geotextile used for wrapping the periphery of the mesh metal cup-shaped frame and filtering water.

5. The construction method of the horizontal drainage system for consolidating soft foundation according to claim 1, characterized in that: An inverted U-shaped water collection unit is composed of a four-way water guide and two vertical water collection pipes connected with the four-way water guide.

6. The construction method of the horizontal drainage system for consolidating soft foundation according to claim 5, characterized in that: The system comprises a plurality of inverted U-shaped water collection units, and the parts of each inverted U-shaped water collection unit on the soft ground surface are arranged in a distributed matrix within the region.

7. The construction method of the horizontal drainage system for consolidating soft foundation according to claim 1, characterized in that: A plurality of first drainage branch pipes are arranged between two horizontal drainage main pipes. The first drainage branch pipes are formed by connecting adjacent four-way water-guiding parts arranged in a straight line in series through a plurality of horizontal drainage branch pipes. One end of the first drainage branch pipe is connected to one of the horizontal drainage main pipes, and the other end of the first drainage branch pipe is connected to the other horizontal drainage main pipe.

8. The construction method of a horizontal drainage system for consolidating soft foundation according to claim 1, characterized in that: A plurality of second drainage branch pipes are arranged between the edge of the soft ground base surface and the horizontal drainage main pipe near the edge of the soft ground base surface. The second drainage branch pipes are formed by connecting adjacent four-way water-conducting parts arranged in a C shape or a mirrored C shape in series through a plurality of horizontal drainage branch pipes; one end of the second drainage branch pipe is connected to an opening of the horizontal drainage main pipe near the edge of the soft ground base surface, and the other end thereof is connected to another opening of the horizontal drainage main pipe near the edge of the soft ground base surface.

9. The construction method of a horizontal drainage system for consolidating soft foundation according to claim 1, characterized in that: The system also includes at least one water pump; the water inlet of the water pump is arranged in the water collection well module; the water pump is used to pump out the accumulated water in the water collection well module.

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