Microorganism grouting device for foundation pit supporting structure
By designing the mixing tube and the mixing block in the injection chamber in the microbial grouting device of the foundation pit support structure, the problem of uneven mixing of bacterial fluid and cementitious fluid is solved, the cementing effect in soil pores is improved, and the work is improved Efficiency and cleanliness.
Patent Information
- Application Number
- CN202420842786.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing foundation pit support structure microorganism grouting device is prone to uneven mixing when the bacterial solution and cementitious solution are added to the soil pores, which affects the cementing reaction effect.
A device including a first grouting tube, a second grouting tube, a mixing tube and a grouting head is designed. The mixing tube is divided into a mixing cavity and an injection cavity through a partition plate, and a plurality of mixing blocks are provided in the injection cavity. Used for initial mixing and dispersing bacterial fluid and cementitious fluid to improve mixing effect, and enhance sealing and cleaning by setting a detachable half-tube and rubber layer.
The mixing effect of bacterial fluid and cementitious liquid before entering the soil pores through the grouting head is improved, the cementing reaction effect is enhanced, and the cleaning is facilitated, reducing the waste and working efficiency of cementitious liquid.
Smart Images
Figure CN222314051U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of geotechnical engineering technology, and in particular to a microbial grouting device for a foundation pit support structure. Background Art
[0002] This year, with the rapid development of the economy and society, the number of high-rise buildings has increased year by year, and the corresponding number of deep foundation pit construction has also increased accordingly. During the construction of deep foundation pits, due to reasons such as excessively high groundwater levels, water seepage problems often occur in the foundation pit support structures, threatening the safety of personnel on the construction site.
[0003] Microbial induced calcium carbonate precipitation technology is currently commonly used to fill soil voids. Microbial induced calcium carbonate precipitation technology is a new type of environmentally friendly soil reinforcement technology. This technology uses microorganisms to produce urease to decompose urea to produce CO32-, inducing Ca2+ to combine with it to form calcium carbonate precipitate, thereby filling the soil pores, thereby improving soil strength and soil permeability.
[0004] At present, a grouting device is used to add bacterial liquid and cementing liquid to the soil pores. The grouting device includes a first grouting pipe, a second grouting pipe and a grouting head. The first grouting pipe is used to add the bacterial liquid into the grouting head, and the second grouting pipe is used to add the cementing liquid into the grouting head. The grouting head adds the bacterial liquid and the cementing liquid into the soil pores at the same time, so that a cementing reaction occurs, thereby improving the soil strength.
[0005] Since the bacterial liquid and the cementing liquid may be mixed unevenly when added to the soil pores, which affects the cementing reaction effect, this needs to be improved. Utility Model Content
[0006] In order to improve the mixing effect of adding bacterial liquid and cementing liquid into soil pores, the present application provides a microbial grouting device for a foundation pit support structure.
[0007] The microbial grouting device for foundation pit support structure provided in this application adopts the following technical solution:
[0008] A microbial grouting device for a foundation pit support structure, comprising a first grouting pipe, a second grouting pipe, a grouting head and a mixing pipe, wherein the mixing pipe is installed at the entrance of the grouting head, and one end of the first grouting pipe and the second grouting pipe are both connected to the mixing pipe; the mixing pipe is divided into a mixing chamber and an injection chamber by a partition plate, and the partition plate is provided with an addition hole for connecting the mixing chamber and the injection chamber, and the injection chamber is connected to the grouting head;
[0009] A mixing piece is arranged in the injection cavity, and the mixing piece includes a plurality of mixing blocks. Both ends of all the mixing blocks are connected to the inner wall of the injection cavity, and all the mixing blocks are arranged at intervals along the width direction of the mixing tube.
[0010] By adopting the above-mentioned technical scheme, by setting up a mixing tube, the first grouting tube and the second grouting tube can add the bacterial liquid and the cementing liquid into the mixing tube at the same time, first mix them in the mixing chamber, and then enter the injection chamber through the adding hole. The multiple mixing blocks injected into the inner wall of the cavity can disperse the mixture of the bacterial liquid and the cementing liquid, and then re-mix them into the grouting head; thereby improving the mixing effect of the bacterial liquid and the cementing liquid before entering the soil pores through the grouting head, thereby improving the cementing effect.
[0011] Optionally, the mixing elements are provided in multiple groups, all of which are arranged at intervals along the axial direction of the mixing tube, and the mixing blocks of two adjacent groups of mixing elements are arranged in staggered positions.
[0012] By adopting the above technical solution, by providing a plurality of mixing pieces and staggering two adjacent groups of mixing pieces, the stirring effect of the bacterial liquid and the cementing liquid in the injection cavity can be increased, thereby improving the cementing effect.
[0013] Optionally, the mixing tube includes a first half tube and a second half tube, and the first half tube and the second half tube are connected by a connecting assembly; one end of the first half tube and the second half tube are both detachably connected to the grouting head; one end of the mixing block is fixed to the inner wall of the first half tube, and the other end of the mixing block is abutted against the inner wall of the first half tube.
[0014] By adopting the above-mentioned technical solution, by setting the mixing tube as the first half tube and the second half tube, the mixing part can be exposed to the outside, so as to facilitate the cleaning of the inner wall of the injection chamber and the inner wall of the mixing chamber after the grouting is completed, reduce the occurrence of cementation of the bacterial liquid and the cementing liquid in the injection chamber, and maintain work efficiency.
[0015] Optionally, the connection assembly includes a dovetail block and a dovetail groove, the dovetail block is fixed to the first half tube, the dovetail groove is opened in the second half tube, and the dovetail block and the dovetail groove match each other.
[0016] By adopting the above technical solution, the plug-in cooperation between the dovetail block and the dovetail groove can connect the first half pipe and the second half pipe, and reduce the situation where the dovetail block is separated from the dovetail groove.
[0017] Optionally, the outer wall of the dovetail block is wrapped with a rubber layer.
[0018] By adopting the above technical solution and providing a rubber layer, the sealing effect of the dovetail block inserted in the dovetail groove can be further improved, and the bacterial liquid and cementing liquid in the mixing tube can be reduced from overflowing to the outside through the gap between the first half tube and the second half tube.
[0019] Optionally, a first threaded portion is provided on the outer wall of the first half tube, and a second threaded portion is provided on the outer wall of the second half tube; when the first half tube and the second half tube are connected, the first threaded portion and the second threaded portion are spliced to form a first thread groove, and a second thread groove for cooperating with the first thread groove is provided on the inner wall of the grouting head.
[0020] By adopting the above technical solution, the cooperation of the first thread groove and the second thread groove can detachably connect the mixing tube and the grouting head, and the structure is simple, which is convenient for workers to disassemble and assemble, thereby improving work efficiency.
[0021] Optionally, the outer wall of the mixing tube is coated with a heat insulation layer.
[0022] By adopting the above technical solution and setting a heat insulation layer, the transmission of external temperature to the mixing chamber and the injection chamber through the mixing tube is reduced, the premature bonding of the bacterial liquid and the bonding liquid in the mixed liquid is reduced, and the work efficiency is improved.
[0023] Optionally, it also includes a first feeding box and a second feeding box, the two ends of the first grouting pipe are respectively connected to the first feeding box and the mixing tube, and the two ends of the second grouting pipe are respectively connected to the second feeding box and the mixing tube; a stirring assembly is arranged in the first feeding box.
[0024] By adopting the above technical solution, the first feeding box and the second feeding box are used to inject the bacterial liquid and the bonding liquid into the mixing tube at the same time; and by setting a stirring component, the bacterial community in the bacterial liquid can be stirred evenly, further improving the bonding effect of the bacterial liquid and the bonding liquid.
[0025] In summary, the present application includes at least one of the following beneficial technical effects:
[0026] 1. By setting a mixing tube, the first grouting tube and the second grouting tube can add the bacterial liquid and the cementing liquid into the mixing tube at the same time for initial mixing, and then enter the injection cavity through the adding hole. The multiple mixing blocks injected into the inner wall of the cavity can disperse the mixed liquid of the bacterial liquid and the cementing liquid, and then re-mix it into the grouting head; thereby improving the mixing effect of the bacterial liquid and the cementing liquid before entering the soil pores through the grouting head, thereby improving the cementing effect;
[0027] 2. By setting the mixing tube as the first half tube and the second half tube, the mixing piece can be exposed to the outside, so as to facilitate the cleaning of the inner wall of the injection cavity and the inner wall of the mixing cavity after the grouting is completed, and reduce the cementation of the bacterial liquid and the cementing liquid in the injection cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a structural schematic diagram of this embodiment;
[0029] Figure 2Schematic diagram of the structure of the composite tube of this embodiment;
[0030] Figure 3 It is a partial cross-sectional view of the composite pipe of this embodiment.
[0031] Explanation of the accompanying drawings: 1. first grouting pipe; 2. second grouting pipe; 3. mixing pipe; 31. first half pipe; 32. second half pipe; 33. connecting assembly; 34. dovetail block; 35. dovetail groove; 36. rubber layer; 37. thermal insulation layer; 38. covering sheet; 39. first thread groove; 391. first threaded portion; 392. second threaded portion; 4. grouting head; 41. second thread groove; 42. grouting hole; 5. first feeding box; 51. stirring assembly; 52. stirring shaft; 53. first stirring blade; 54. second stirring blade; 55. motor; 6. second feeding box; 61. refrigeration plate; 7. partition plate; 71. mixing chamber; 72. injection chamber; 73. adding hole; 8. mixing element; 81. mixing block. DETAILED DESCRIPTION
[0032] The following is combined with Figure 1-3 This application is described in further detail.
[0033] The embodiment of the present application discloses a microbial grouting device for a foundation pit support structure.
[0034] Reference Figure 1 A microbial grouting device for a foundation pit support structure comprises a first grouting pipe 1, a second grouting pipe 2, a mixing pipe 3, a grouting head 4, a first feeding box 5 and a second feeding box 6. The first feeding box 5 is used to hold bacterial liquid, and the second feeding box 6 is used to hold binder liquid; the two ends of the first grouting pipe 1 are respectively connected to the first feeding box 5 and the mixing pipe 3, the two ends of the second grouting pipe 2 are respectively connected to the second feeding box 6 and the mixing pipe 3, and the mixing pipe 3 and the grouting head 4 are connected.
[0035] In this embodiment, the inner walls of the first feeding box 5 and the second feeding box 6 are both embedded with cooling fins 61. The cooling fins 61 can cool the bacterial liquid and the binder liquid, thereby reducing the binder reaction in the mixing tube 3 after the bacterial liquid and the binder liquid are mixed.
[0036] A stirring assembly 51 is arranged in the first feeding box 5, and the stirring assembly 51 includes a stirring shaft 52, a first stirring blade 53, a second stirring blade 54 and a motor 55. The stirring shaft 52 is rotatably installed in the first feeding box 5, and the motor 55 is installed in the first feeding box 5 to drive the stirring shaft 52 to rotate; the first stirring blade 53 is obliquely arranged on the stirring shaft 52, and the second stirring blade 54 is arranged on the stirring shaft 52 and abuts against the bottom wall of the first feeding box 5. When the stirring shaft 52 rotates, the first stirring blade 53 and the second stirring blade 54 can stir the bacterial liquid so that the bacterial liquid is mixed evenly; and the second stirring blade 54 can stir out the microorganisms on the bottom wall of the first feeding box 5, so as to further improve the uniform effect of the bacterial liquid.
[0037] Reference Figure 2 The mixing tube 3 includes a first half tube 31 and a second half tube 32, which are connected by a connecting assembly 33; a covering piece 38 is provided at one end of the first half tube 31, and when the first half tube 31 and the second half tube 32 are connected, the covering piece 38 covers the openings at one end of the first half tube 31 and the second half tube 32, and the first grouting tube 1 and the second grouting tube 2 are both connected to the covering piece 38; the first half tube 31 and the second half tube 32 are connected to the grouting head 4 at the openings at one end away from the covering piece 38.
[0038] The outer walls of the first half tube 31 and the second half tube 32 are coated with a heat insulation layer 37, and the heat insulation layer 37 is made of heat insulation paint; by providing the heat insulation layer 37, the situation of the external temperature being transmitted to the mixing chamber 71 and the injection chamber 72 through the mixing tube 3 is reduced, and the situation of the bacterial liquid and the bonding liquid being bonded in the mixed liquid in advance is reduced.
[0039] The connection assembly 33 includes a dovetail block 34, a dovetail groove 35 and a rubber layer 36. The dovetail block 34 is arranged on the first half pipe 31, and the dovetail block 34 and the first half pipe 31 are integrally formed, and the rubber layer 36 is wrapped around the outer wall of the dovetail block 34; the dovetail groove 35 is arranged on the second half pipe 32, and the outer diameter of the dovetail block 34 matches the inner diameter of the dovetail groove 35. The dovetail block 34 and the dovetail groove 35 are plugged and matched to connect the first half pipe 31 and the second half pipe 32, and the rubber layer 36 is provided to increase the sealing performance of the first half pipe 31 and the second half pipe 32, thereby reducing the leakage of the bacterial liquid and the cementing liquid from the gap between the first half pipe 31 and the second half pipe 32 to the outside.
[0040] Reference Figure 2 and Figure 3The first half pipe 31 is provided with a first threaded portion 391 on its outer wall, and the second half pipe 32 is provided with a second threaded portion 392 on its outer wall. When the first half pipe 31 and the second half pipe 32 are connected, the first threaded portion 391 and the second threaded portion 392 jointly form a first thread groove 39; the inner wall of the grouting head 4 is provided with a second thread groove 41 that matches the first thread groove 39. The matching of the first thread groove 39 and the second thread groove 41 can connect the composite pipe and the grouting head 4, and reduce the situation where the dovetail block 34 freely slides in the dovetail groove 35.
[0041] Reference Figure 3 A partition plate 7 is provided on the inner wall of the mixing tube 3, one side of the partition plate 7 is connected to the first half tube 31, and the other side of the partition plate 7 is abutted against the inner wall of the second half tube 32; the partition plate 7 divides the mixing tube 3 into a mixing chamber 71 and an injection chamber 72, the mixing chamber 71 is connected to the first grouting tube 1 and the second grouting tube 2, the injection chamber 72 is connected to the grouting head 4, and the partition plate 7 is provided with an addition hole 73 for connecting the mixing chamber 71 and the injection chamber 72.
[0042] Reference Figure 2 A plurality of groups of mixing elements 8 are arranged in the injection cavity 72, all of which are arranged at intervals along the length direction of the first half pipe 31, and two adjacent groups of mixing elements 8 are staggered; the mixing element 8 includes a plurality of mixing blocks 81, all of which are arranged at intervals along the width direction of the first half pipe 31; one end of the mixing block 81 is fixed to the inner wall of the first half pipe 31, and the other end of the mixing block 81 is in contact with the inner wall of the second half pipe 32.
[0043] Reference Figure 1 The grouting head 4 is made of stainless steel to reduce the corrosion caused by adding bacterial solution and cementing liquid into the soil pores for a long time. A plurality of grouting holes 42 are opened on the outer wall, and all the grouting holes 42 are used to pass the bacterial solution and cementing liquid in the injection cavity 72 into the soil pores.
[0044] The implementation principle of a microbial grouting device for a foundation pit support structure in the embodiment of the present application is as follows:
[0045] The first grouting pipe 1 and the second grouting pipe 2 can add the bacterial liquid and the cementing liquid into the mixing pipe 3 at the same time, first mix them in the mixing chamber 71, and then enter the injection chamber 72 through the adding hole 73. The multiple mixing blocks 81 on the inner wall of the injection chamber 72 can disperse the mixed liquid of the bacterial liquid and the cementing liquid, and then remix them into the grouting head 4; thereby improving the mixing effect of the bacterial liquid and the cementing liquid before entering the soil pores through the grouting head 4, thereby improving the cementing effect. After the grouting is completed, it is convenient to clean the inner wall of the injection chamber 72 and the inner wall of the mixing chamber 71, reducing the cementation of the bacterial liquid and the cementing liquid in the injection chamber 72.
[0046] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A microbial grouting device for foundation pit support structure, characterized in that: The invention comprises a first grouting pipe (1), a second grouting pipe (2), a grouting head (4) and a mixing pipe (3), wherein the mixing pipe (3) is installed at the entrance of the grouting head (4), and one end of the first grouting pipe (1) and the second grouting pipe (2) are both connected to the mixing pipe; the mixing pipe (3) is divided by a partition plate (7) to form a mixing chamber (71) and an injection chamber (72), and the partition plate (7) is provided with an addition hole (73) for connecting the mixing chamber (71) and the injection chamber (72), and the injection chamber (72) is connected to the grouting head (4); A mixing element (8) is arranged in the injection cavity (72), and the mixing element (8) comprises a plurality of mixing blocks (81). Both ends of all the mixing blocks (81) are connected to the inner wall of the injection cavity (72), and all the mixing blocks (81) are arranged at intervals along the width direction of the mixing tube (3).
2. A microbial grouting device for foundation pit support structure according to claim 1, characterized in that: The mixing elements (8) are arranged in multiple groups, and all the mixing elements (8) are arranged at intervals along the axial direction of the mixing tube (3), and the mixing blocks (81) of two adjacent groups of mixing elements (8) are arranged in a staggered manner.
3. The microbial grouting device for foundation pit support structure according to claim 1 is characterized in that: The mixing tube (3) comprises a first half tube (31) and a second half tube (32), wherein the first half tube (31) and the second half tube (32) are connected via a connecting assembly (33); one end of each of the first half tube (31) and the second half tube (32) is detachably connected to a grouting head (4); one end of the mixing block (81) is fixed to an inner wall of the first half tube (31), and the other end of the mixing block (81) is in contact with the inner wall of the first half tube (31).
4. A microbial grouting device for foundation pit support structure according to claim 3, characterized in that: The connection assembly (33) comprises a dovetail block (34) and a dovetail groove (35), wherein the dovetail block (34) is fixed to the first half pipe (31), and the dovetail groove (35) is opened in the second half pipe (32), and the dovetail block (34) and the dovetail groove (35) cooperate with each other.
5. A microbial grouting device for foundation pit support structure according to claim 4, characterized in that: The outer wall of the dovetail block (34) is wrapped with a rubber layer (36).
6. The microbial grouting device for foundation pit support structure according to claim 3 is characterized in that: The first half-tube (31) has a first threaded portion (391) on its outer wall, and the second half-tube (32) has a second threaded portion (392) on its outer wall; when the first half-tube (31) and the second half-tube (32) are connected, the first threaded portion (391) and the second threaded portion (392) are spliced to form a first thread groove (39), and the inner wall of the grouting head (4) has a second thread groove (41) for matching with the first thread groove (39).
7. The microbial grouting device for foundation pit support structure according to claim 1 is characterized in that: The outer wall of the mixing tube (3) is coated with a heat insulation layer (37).
8. The microbial grouting device for foundation pit support structure according to claim 1 is characterized in that: It also comprises a first feeding box (5) and a second feeding box (6), wherein the two ends of the first grouting pipe (1) are respectively connected to the first feeding box (5) and the mixing pipe (3), and the two ends of the second grouting pipe (2) are respectively connected to the second feeding box (6) and the mixing pipe (3); and a stirring assembly (51) is arranged in the first feeding box (5).