Vacuum extrusion drainage consolidation method and device for high polymer grouting soft foundation
By using the soft foundation of polymer grouting soft foundation vacuum extrusion drainage consolidation method on soft soil foundation, vacuum pump and water pump are used for negative pressure pumping, and combined with the expansion and extrusion of polymer slurry, the soft in the prior art is solved The shortcomings of the land foundation drainage method have achieved rapid and effective reinforcement effects.
Patent Information
- Application Number
- CN202411976783.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-02-18
AI Technical Summary
The existing soft soil foundation drainage methods have problems such as troublesome disassembly and assembly of equipment, poor drainage area planning, slow construction progress, poor drainage effect, slow drainage and lack of obvious improvement of soil pores.
Using polymer grouting soft-base vacuum extrusion drainage consolidation method, by laying sand and gravel cushion and plastic film on the surface of the construction area, drainage holes and peripheral holes are opened, and water pumps are used to pump water negatively, combining polymer The expansion and extrusion of the slurry achieves rapid consolidation of the soil.
It improves drainage efficiency, shortens the construction cycle, enhances the soil density, improves the bearing capacity and stability of the foundation, and reduces the impact on the environment.
Smart Images
Figure CN119465914A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of soft soil foundation settlement repair, and in particular to a polymer grouting soft foundation vacuum extrusion drainage consolidation method and device. Background Art
[0002] Soft soil foundation usually refers to a soft soil layer with low strength, high water content and high compression. Most of them contain a certain amount of organic matter. Due to the low strength and large settlement of soft soil, it often brings great harm to road projects. If not handled properly, it will have a serious impact on the construction and use of the highway.
[0003] Therefore, during the construction process, professional drainage is required to quickly drain and consolidate the soft soil foundation. The existing drainage methods, such as cofferdam extraction combined with exposure, have many shortcomings. During the implementation process, the equipment is troublesome to disassemble and assemble, the drainage area is difficult to plan, and the construction progress is slow. At the same time, the drainage effect is poor and the drainage is slow. At the same time, the effect of improving the soil porosity is not obvious. Summary of the invention
[0004] The purpose of the present invention is to provide a polymer grouting soft foundation vacuum extrusion drainage consolidation method and device to solve the problems of existing drainage methods, such as cofferdam extraction combined with exposure, the trouble of equipment disassembly and assembly during implementation, the difficulty in planning the drainage area and the slow construction progress, the poor drainage effect and slow drainage, and the lack of obvious improvement effect on soil porosity.
[0005] To achieve the above object, the present invention provides a polymer grouting soft foundation vacuum extrusion drainage consolidation method, the polymer grouting soft foundation vacuum extrusion drainage consolidation method comprising the following steps: After laying a layer of gravel cushion on the surface of the construction area, a layer of plastic film is laid on the gravel cushion; A drainage hole is opened vertically downward in the construction area, and a drainage and air extraction integrated pipeline is installed into the drainage hole; With the drainage hole as the center, peripheral holes are provided around it in a circumferential direction vertically downward, and the peripheral holes are spaced apart from the drainage hole; A vacuum pump is connected to the drainage and air extraction integrated pipeline to draw a vacuum on the drainage hole so that a negative pressure is reached in the drainage hole; When a lot of water accumulates in the drainage hole, a water pump is used to connect the drainage and air extraction integrated pipeline to pump out the water in the drainage hole; The drainage hole is again evacuated to negative pressure by the vacuum pump, and polymer slurry is injected into the peripheral holes by the grouting machine, and the soil is squeezed by the negative pressure and the expansion of the polymer slurry, and the moisture of the soil is squeezed into the drainage hole again and extracted; The grouting machine is used to inject polymer slurry into the drainage hole to squeeze and consolidate the soil in the area around the drainage hole, reduce the pore size and make the soil more compact.
[0006] The upper portion of the integrated drainage and air extraction pipeline is a closed section, and the lower portion of the integrated drainage and air extraction pipeline is a permeable section, and a plurality of permeable holes are arranged on the permeable section.
[0007] Wherein, geotextile is fixed to the outside of the infiltration section through wire mesh, and the bottom of the integrated drainage and air extraction pipe is arranged in a pointed structure.
[0008] Among them, in the step of "using a vacuum pump to connect the integrated drainage and air extraction pipe to draw vacuum from the drainage hole to make a negative pressure in the drainage hole; when there is a lot of water accumulated in the drainage hole, using a water pump to connect the integrated drainage and air extraction pipe to extract the accumulated water in the drainage hole", the work of using the vacuum pump to evacuate the drainage hole and using the water pump to pump water from the drainage hole needs to be cycled 2 to 3 times.
[0009] Wherein, a baffle is fixed on the top of the plastic film by rivets, and the bottom end of the rivet extends into the interior of the sand and gravel cushion layer.
[0010] Among them, the spacing between the multiple peripheral holes and the drainage holes is 7-10m, the height of the drainage hole is H1, the height of each peripheral hole is H2, and the spacing difference between the drainage hole and the peripheral holes needs to satisfy 1m≤H1-H2≤1.5m.
[0011] The present invention also provides a polymer grouting soft foundation vacuum extrusion drainage consolidation device, which is applied to the polymer grouting soft foundation vacuum extrusion drainage consolidation method as described above.
[0012] The present invention discloses a polymer grouting soft foundation vacuum extrusion drainage consolidation method and device. The peripheral holes are drilled in a ring shape in the soft soil foundation, and the expansion force of the polymer grouting is used to extrude the soft soil inside the ring area, thereby increasing the soil density and reducing the pore size, thereby improving the bearing capacity and stability of the foundation. This method can effectively solve the problems existing in the prior art, improve drainage efficiency, shorten the construction period, and reduce the impact on the environment. By making full use of the expansion characteristics of the polymer grouting and the consolidation effect of the vacuum preloading method, the technical solution can achieve rapid and effective reinforcement of the soft soil foundation, greatly reduce the number of experiments, and improve the accuracy and economy of construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 The invention provides a flow chart of the steps of the polymer grouting soft foundation vacuum extrusion drainage consolidation method.
[0015] Figure 2 It is a schematic diagram of the integrated drainage and air extraction pipeline provided by the present invention when air is being extracted during the construction process.
[0016] Figure 3 It is a schematic structural diagram of the integrated drainage and air extraction pipeline provided by the present invention.
[0017] Figure 4 It is a schematic cross-sectional view of the bottom pointed structure of the integrated drainage and air extraction pipeline provided by the present invention.
[0018] Figure 5 It is a top view schematic diagram of the construction area after the peripheral holes provided by the present invention are set.
[0019] Figure 6 It is a schematic diagram of injecting polymer slurry during the consolidation construction process provided by the present invention.
[0020] 101-sand and gravel cushion layer, 102-plastic film, 103-drainage hole, 104-drainage and exhaust integrated pipeline, 105-peripheral hole, 106-vacuum pump, 107-water pump, 108-grouting machine, 109-polymer slurry, 110-rivet, 111-baffle, 112-sealed section, 113-permeable section, 114-permeable hole, 115-wire mesh, 116-geotextile, 117-pointed head. DETAILED DESCRIPTION
[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0022] See also Figures 1 to 6 The present invention provides a polymer grouting soft foundation vacuum extrusion drainage consolidation method, the polymer grouting soft foundation vacuum extrusion drainage consolidation method comprises the following steps: S1: After laying a layer of gravel cushion layer 101 on the surface of the construction area, a layer of plastic film 102 is laid on the gravel cushion layer 101; S2: Open a drainage hole 103 vertically downward in the construction area, and install the drainage and air extraction integrated pipe 104 into the drainage hole 103; S3: With the drainage hole 103 as the center, peripheral holes 105 are formed in a circumferential direction and vertically downward around the drainage hole 103, and the peripheral holes 105 are spaced apart from the drainage hole 103; S4: Using a vacuum pump 106 connected to the integrated drainage and air extraction pipeline 104 to draw a vacuum on the drainage hole 103 so that a negative pressure is reached in the drainage hole 103; S5: When a lot of water accumulates in the drainage hole 103, a water pump 107 is used to connect the drainage and air extraction integrated pipeline 104 to pump out the water in the drainage hole 103; S6: The drainage hole 103 is again evacuated to negative pressure by the vacuum pump 106, and the polymer slurry 109 is injected into the peripheral hole 105 by the grouting machine 108, and the soil is squeezed by the negative pressure and the expansion of the polymer slurry 109, and the moisture of the soil is squeezed into the drainage hole 103 again and extracted; S7: using the grouting machine 108 to inject polymer slurry 109 into the drainage hole 103, squeezing and consolidating the soil in the area around the drainage hole 103, reducing the pore size and making the soil more compact.
[0023] In this embodiment, the peripheral holes 105 are drilled in a ring shape in the soft soil foundation, and the expansion force of the polymer grouting is used to squeeze the soft soil inside the ring area, thereby increasing the soil density and reducing the pore size, thereby improving the bearing capacity and stability of the foundation. This method can effectively solve the problems existing in the prior art, improve drainage efficiency, shorten the construction period, and reduce the impact on the environment. By making full use of the expansion characteristics of the polymer grouting and the consolidation effect of the vacuum preloading method, this technical solution can achieve rapid and effective reinforcement of the soft soil foundation, greatly reduce the number of experiments, and improve the accuracy and economy of construction.
[0024] Furthermore, a baffle 111 is fixed above the plastic film 102 via a rivet 110 , and the bottom end of the rivet 110 extends into the interior of the sand and gravel cushion layer 101 .
[0025] In this embodiment, the gravel cushion layer 101 and the plastic film 102 are laid on the soil surface to increase the airtightness of the drainage hole 103, and the baffle 111 is installed by the rivet 110 to prevent the baffle 111 from vibrating during the construction process and causing the integrated drainage and air extraction pipeline 104 to deviate.
[0026] Furthermore, the upper portion of the integrated drainage and air extraction pipe 104 is a closed section 112, and the lower portion of the integrated drainage and air extraction pipe 104 is a permeable section 113. The permeable section 113 is provided with a plurality of permeable holes 114. A geotextile 116 is fixed to the outside of the permeable section 113 via a wire mesh 115, and the bottom of the integrated drainage and air extraction pipe 104 is provided with a pointed structure 117.
[0027] In this embodiment, the geotextile 116 is fixed to the outside of the permeable section 113 through the wire mesh 115 to enhance the stability and filtering effect of the integrated drainage and air extraction pipe 104. The geotextile 116 is water permeable to facilitate the discharge of moisture and prevent soil particles from blocking the permeable holes 114 and flowing into the drainage holes 103. The wire mesh 115 is corrosion-resistant to extend the service life of the integrated drainage and air extraction pipe 104. The bottom of the integrated drainage and air extraction pipe 104 is provided with a pointed head 117 structure to make it easier to insert into the soil, thereby improving construction efficiency.
[0028] Furthermore, the work of using the vacuum pump 106 to evacuate the drainage hole 103 and using the water pump 107 to pump water from the drainage hole 103 needs to be circulated 2 to 3 times.
[0029] In this embodiment, after multiple cycles, as much accumulated water as possible in the construction area can be discharged.
[0030] Furthermore, the spacing between the plurality of peripheral holes 105 and the drainage holes 103 is 7-10 m, the height of the drainage holes 103 is H1, the height of each peripheral hole 105 is H2, and the spacing difference between the drainage holes 103 and the peripheral holes 105 needs to satisfy 1 m ≤ H1 - H2 ≤ 1.5 m.
[0031] In this embodiment, the height difference and the negative pressure are used to allow the accumulated water in the surrounding area to penetrate into the drainage holes 103, and then the accumulated water is pumped out in a centralized manner to achieve the purpose of drainage.
[0032] The present invention also provides a polymer grouting soft foundation vacuum extrusion drainage consolidation device, which is applied to the polymer grouting soft foundation vacuum extrusion drainage consolidation method as described above.
[0033] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.
Claims
1. A polymer grouting soft foundation vacuum extrusion drainage consolidation method, characterized in that: The steps include: After laying a layer of gravel cushion on the surface of the construction area, a layer of plastic film is laid on the gravel cushion; A drainage hole is opened vertically downward in the construction area, and a drainage and air extraction integrated pipeline is installed into the drainage hole; With the drainage hole as the center, peripheral holes are provided around it in a circumferential direction vertically downward, and the peripheral holes are spaced apart from the drainage hole; A vacuum pump is connected to the drainage and air extraction integrated pipeline to draw a vacuum on the drainage hole so that a negative pressure is reached in the drainage hole; When a lot of water accumulates in the drainage hole, a water pump is used to connect the drainage and air extraction integrated pipeline to pump out the water in the drainage hole; The drainage hole is again evacuated to negative pressure by the vacuum pump, and polymer slurry is injected into the peripheral holes by the grouting machine, and the soil is squeezed by the negative pressure and the expansion of the polymer slurry, and the moisture of the soil is squeezed into the drainage hole again and extracted; The grouting machine is used to inject polymer slurry into the drainage hole to squeeze and consolidate the soil in the area around the drainage hole, reduce the pore size and make the soil more compact.
2. The polymer grouting soft foundation vacuum extrusion drainage consolidation method according to claim 1, characterized in that: The upper portion of the integrated drainage and air extraction pipeline is a closed section, and the lower portion of the integrated drainage and air extraction pipeline is a permeation section, and a plurality of permeation holes are arranged on the permeation section.
3. The polymer grouting soft foundation vacuum extrusion drainage consolidation method according to claim 2, characterized in that: The outside of the infiltration section is fixed with geotextile through wire mesh, and the bottom of the integrated drainage and air extraction pipeline is arranged in a pointed structure.
4. The polymer grouting soft foundation vacuum extrusion drainage consolidation method according to claim 3, characterized in that: In the step of "using a vacuum pump to connect the integrated drainage and air extraction pipeline to draw a vacuum on the drainage hole to create a negative pressure in the drainage hole; when a lot of water accumulates in the drainage hole, using a water pump to connect the integrated drainage and air extraction pipeline to extract the accumulated water in the drainage hole", the work of using the vacuum pump to draw air from the drainage hole and using the water pump to pump water from the drainage hole needs to be cycled 2 to 3 times.
5. The polymer grouting soft foundation vacuum extrusion drainage consolidation method according to claim 4 is characterized in that: A baffle is fixed above the plastic film by rivets, and the bottom end of the rivet extends into the interior of the sand and gravel cushion layer.
6. The polymer grouting soft foundation vacuum extrusion drainage consolidation method according to claim 5, characterized in that: The spacing between the plurality of peripheral holes and the drainage holes is 7-10m, the height of the drainage holes is H1, the height of each peripheral hole is H2, and the spacing difference between the drainage holes and the peripheral holes needs to satisfy 1m≤H1-H2≤1.5m.
7. A polymer grouting soft foundation vacuum extrusion drainage consolidation device, characterized in that: Applicable to the polymer grouting soft foundation vacuum extrusion drainage consolidation method as described in claim 6.