CN215105065U

CN215105065U - Microbial improvement river course shore protection device

Info

Publication number: CN215105065U
Application number: CN202023009003.1U
Authority: CN
Inventors: 徐国宾; 杨德锋; 董帅
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-12-10
Anticipated expiration: 2030-12-14

Abstract

The utility model discloses a microbial improved river bank protection device, which comprises a power transmission system and a slurry diffusion system; the power conveying system comprises a slurry storage tank, slurry, conveying hoses, peristaltic pumps and grouting valves, wherein the slurry is contained in the slurry storage tank, inlets of the peristaltic pumps are connected with the slurry storage tank through the conveying hoses, at least one grouting valve is arranged, and an inlet of each grouting valve is connected with an outlet of the peristaltic pump through the conveying hose; the slurry diffusion system comprises at least one grouting pipe, the number of the grouting pipes is equal to that of the grouting valves, and the grouting pipes correspond to the grouting valves one by one; and the side wall of each grouting pipe is uniformly provided with a grouting hole, the outer side of the pipe wall of each grouting pipe is wrapped with geotextile, the bottom of each grouting pipe is in a sealing type, and the top of each grouting pipe is connected with a conveying hose connected with the outlet of the corresponding grouting valve. The utility model discloses the device is simple, and the construction need not to destroy original river course shore protection, and construction cost is low, and is energy-concerving and environment-protective.

Description

Microbial improvement river course shore protection device

Technical Field

The utility model relates to a river course shore protection engineering technical field, more specifically the saying so relates to a little biological modification river course shore protection device.

Background

The traditional river bank protection is usually focused on the stability and flood control effect of the river bank, and cement and other methods for hardening the bank protection are mostly adopted. In the method, a large amount of cement and river sand are used, so that the environment is greatly influenced, the hardened revetment completely obstructs the interaction of an ecological system between a river bank and a river bed, and the ecological system of the river bank is greatly damaged. In addition, the conventional design of hard bank revetments may also create a shift to the problem of erosion and corrosion damage to the downstream banks. In the aspect of modern sustainability development, the sustainability of a river channel ecosystem must be considered for river development and treatment work. Therefore, it is very important to improve the ecological type of river bank protection. The ecological river bank protection is a river bank protection device which can ensure that river water and aquatic organisms can mutually permeate soil while giving consideration to the stability of the river bank; and can also provide supplies for surface water and underground water in a certain area. In recent years, the technology of generating calcium carbonate (MICP) by microorganism induction is widely researched, and the microorganism grouting solidification technology has the advantages of good fluidity, small grouting pressure, good controllability, few byproducts, environmental protection and the like, and is considered to be a technology with sustainable development potential. The technology is applied to the improvement of river bank protection and ecological bank protection restoration, so that a full ecological structure is adopted in a river bank protection system, the effects of scour resistance and flood control can be exerted by the bank protection structure, and the ecological and environment-friendly values can be comprehensively embodied.

Therefore, the technology of generating calcium carbonate by microbial induction is adopted to improve the river bank protection, and a microbial improved river bank protection device and a construction method are developed, so that the method has important significance for the comprehensive application of the development and treatment of the river bank protection.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the prior art, provide a little biological improvement river course shore protection device, both can realize the stability and the flood control effect of river course shore protection, also can embody ecological sustainable development, build good river bank ecosystem. The utility model discloses the device is simple, and the work progress need not to destroy original river course shore protection, and construction cost is low, and this construction technology is energy-concerving and environment-protective, can reach better improvement effect in short-term, is fit for using widely.

The purpose of the utility model is realized through the following technical scheme.

The utility model discloses a microbial improvement river bank protection device, which comprises a power transmission system and a slurry diffusion system, wherein the outlet of the power transmission system is connected with the inlet of the slurry diffusion system;

the power conveying system comprises a slurry storage tank, slurry, conveying hoses, peristaltic pumps and grouting valves, wherein the slurry is contained in the slurry storage tank, inlets of the peristaltic pumps are connected with the slurry storage tank through the conveying hoses, at least one grouting valve is arranged, and each grouting valve inlet is connected with an outlet of the peristaltic pump through the conveying hose;

the slurry diffusion system comprises at least one grouting pipe, the number of the grouting pipes is equal to that of the grouting valves, and the grouting pipes correspond to the grouting valves one by one; and slurry outlet holes are uniformly distributed in the side wall of each grouting pipe, geotechnical cloth is wrapped on the outer side of the pipe wall of each grouting pipe, the bottom of each grouting pipe is in a sealing type, and the top of each grouting pipe is connected with a conveying hose connected with the outlet of the corresponding grouting valve.

The peristaltic pump is used for conveying the slurry in the slurry storage tank to the slurry diffusion system, and the peristaltic pump adopts a liquid power conveyor or other liquid power conveyors according to different conditions and requirements.

The slurry is mineralized bacterium suspension or cementing liquid; the culture solution of the mineralized bacteria comprises yeast extract, TRIS and ammonium sulfate; the components of the cementing liquid are CaCl with equal mass concentration₂A mixture of the solution and urea.

Every slip casting bottom all sets up to the cusp form, every the slip casting all perpendicularly impresses in the river course shore protection bank slope, and the slip casting pipe that is close more from the bank boundary is shorter.

And the connection mode between each grouting pipe and the conveying hose connected with the outlet of the corresponding grouting valve adopts sleeve sealing connection, or adopts screw fixing connection and bonding methods, or is connected in other communication modes.

The sleeve pipe inner wall entrance department all is provided with the joint groove, every slip casting valve exit linkage's conveying hose's exit outer wall and every slip casting pipe top entrance outer wall all is provided with the buckle with joint groove sealing connection.

Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:

the utility model discloses a plurality of slip casting pipes are pressed into in river course shore protection bank slope, through power transmission system with mineralize mineralization bacterium and cementite liquid through in the mode injection river course shore protection sand in the grout. Mineralized bacteria induce calcium carbonate precipitation, so that the aim of improving the river bank protection soil is fulfilled, and the river bank protection has stability and erosion resistance. The calcium carbonate precipitation induced by the microorganisms bonds the sand particles on the river bank, but certain pores exist, so that the mutual permeation of river water and aquatic organisms and soil can be realized, the river can be self-purified, and the aim of protecting the river ecological system is fulfilled. The utility model discloses a device's work progress need not to destroy original river course shore protection, develops easy operation, greatly shortens construction cycle, has that construction cost is low, characteristics that low price and economic benefits are high. The grouting pipe does not need to be drawn out after the construction is finished, the grouting pipe can be continuously used as a supporting structure of the river bank protection, and the grouting pipe can be restarted if the projects such as repair are needed in the later period.

Drawings

FIG. 1 is a schematic view of the microbial riverway bank protection device of the present invention;

fig. 2 is a cross section a-a of fig. 1.

Fig. 3 is a cross section B-B of fig. 1.

Fig. 4 is a schematic view of the casing pipe at the junction of the power transmission system and the slurry diffusion system of the microbial improved riverway bank protection device of the present invention.

Reference numerals: 21, a pulp storage pool; 22, slurry; 23 a delivery hose; a 24 peristaltic pump; 25 grouting valve; 31 a sleeve; 311 a clamping groove; 312, buckling; 32 grouting pipes; 33, a pulp outlet hole; 34 geotextile; 40 river bank protection bank slope; 50 river water.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments in the present invention, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.

Numerous specific details are set forth in the following description to provide a thorough understanding of embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar structural elements or elements having like or similar functionality throughout, but which may be embodied in other ways than is described again. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly stated otherwise, the terms "disposed", "connected", "communicating", "pressed", etc. should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; can be mechanically connected or mutually communicated; they may be directly connected or indirectly connected through an intermediate, or they may be connected through the inside of two structures or may be in an interaction relationship between the two structures. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model discloses little biological modification river course shore protection device, including power transmission system and thick liquid diffusion system, power transmission system's export and thick liquid diffusion system's entry linkage. As shown in fig. 1 to 4, the direction of the arrow in the figure is the slurry flow or diffusion direction.

The power transmission system comprises a slurry storage tank 21, slurry 22, a conveying hose 23, a peristaltic pump 24 and a grouting valve 25. The slurry storage tank 21 is used for containing slurry 22, the inlet of the peristaltic pump 24 is connected with the slurry storage tank 21 through a conveying hose 23, at least one grouting valve 25 is arranged, and the inlet of each grouting valve 25 is connected with the outlet of the peristaltic pump 24 through the conveying hose 23.

Wherein, the peristaltic pump 24 is used for conveying the slurry 22 in the slurry storage tank 21 to the slurry diffusion system, and the peristaltic pump 24 adopts a liquid power conveyor or other liquid power conveyors according to different situations and requirements. The slurry 22 is a mineralized bacterial suspension or a cementing liquid. The culture solution of mineralized bacteria comprises yeast extract, TRIS and ammonium sulfate, such as 20g/L yeast extract, 17.5g/L TRIS and 10g/L ammonium sulfate. The components of the cementing liquid are CaCl with equal mass concentration₂A mixture of the solution and urea.

The slurry diffusion system comprises at least one grouting pipe 32, and the number of the grouting pipes 32 is equal to that of the grouting valves 25 and corresponds to that of the grouting valves one to one. A plurality of grout outlet holes 33 are uniformly distributed on the side wall of each grouting pipe 32, and the grout 22 permeates into the river bank protection sandy soil through the grout outlet holes 33 to solidify the bank protection, so that the river bank protection is solidified by microorganism-induced calcium carbonate. The slurry outlet holes 33 are not required to be uniformly arranged on the wall of the grouting pipe 32, and can be adjusted according to the actual situation of the river bank protection bank slope 40, for example, the river bank protection bank slope 40 may have different soil layer distributions, or different sand particle sizes, so as to change the distribution situation of the slurry outlet holes 33 on the grouting pipe 32.

The outer side of the pipe wall of each grouting pipe 32 is tightly wrapped with geotextile 34 so as to prevent sand and the like in river bank protection from entering the grouting pipes 32 and causing unnecessary blockage of the grout outlet 33. The grouting pipes 32 are arranged in the river course revetment bank slope and are vertically pressed into the river course revetment bank slope 40, and the shorter the grouting pipe 32 is, the closer to the boundary of the water bank. The bottom of each grouting pipe 32 is in a sealing type and is in a pointed shape, and the purpose is to easily insert the grouting pipe 32 into the river bank protection bank slope 40. The top of each grouting pipe 32 is connected with the conveying hose 23 connected with the outlet of the corresponding grouting valve 25.

The connection mode between each grouting pipe 32 and the conveying hose 23 connected with the outlet of the corresponding grouting valve 25 adopts the sleeve 31 for sealing connection, and movable disassembly can be realized, or the conveying hose 23 and the grouting pipe 32 can be communicated by adopting methods such as screw fixed connection, bonding and the like, or other communication modes. The department all is provided with joint groove 311 in sleeve 31 inner wall entrance and exit, the delivery hose 23's of every slip casting valve 25 exit linkage exit outer wall and every slip casting pipe 32 top entrance outer wall all is provided with buckle 312 for with joint groove 311 sealing connection, sealed essence lies in preventing the thick liquid 22 in the slip casting pipe 32 and the external quality exchange between, except adopting joint groove 311 and buckle 312 to seal, can also adopt other modes to realize sealed effect, for example set up flexible gasket at sealed position, or adopt sealed glue etc. reduce by sealed fluidic leakage channel, realize sealedly.

The utility model discloses construction method of microbial improvement river course shore protection device, including following process:

the first step is as follows: culturing mineralized bacteria suspension according to the microorganism culture method in the manual of microorganism culture, and culturing by adopting an industrial microorganism culture method if large-scale engineering is available; and preparing a cementing liquid.

The second step is that: the side wall of each grouting pipe 32 is wrapped by geotextile 34, then the grouting pipe 32 is vertically pressed into a bank slope 40 of the river course revetment to be improved, and the transmission hose 23 and the grouting pipe 32 are connected in a sealing way through a sleeve 31.

The third step: and opening the grouting valve 25, starting the peristaltic pump 24, pumping the mineralized bacterium suspension into the grouting pipe 32 under pressure, standing for a set time, continuing pumping the cementing liquid, and then standing for a set time to enable the slurry to be diffused in the bank slope of the river bank protection.

The fourth step: and repeating the third step until the improvement of the river bank protection bank slope 40 meets the design requirement.

The grouting valve 25 is closed when the grouting operation is not performed. The grouting pipe 32 is unnecessary to be pulled out after grouting, can be continuously left in the river bank protection, can play a continuous supporting role, and can be directly used as a prefabricated supporting structure of the river bank protection, so that the structural strength and the stability of the river bank protection are further improved, and the service life of the river bank protection is prolonged. As a preferable scheme, the river bank protection can be a sandy soil bank slope.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above specific functions and operations, and the above specific embodiments are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the protection scope of the present invention.

Claims

1. The microbial improved riverway bank protection device is characterized by comprising a power transmission system and a slurry diffusion system, wherein an outlet of the power transmission system is connected with an inlet of the slurry diffusion system;

the power conveying system comprises a slurry storage tank (21), slurry (22), conveying hoses (23), peristaltic pumps (24) and grouting valves (25), wherein the slurry (22) is contained in the slurry storage tank (21), the inlets of the peristaltic pumps (24) are connected with the slurry storage tank (21) through the conveying hoses (23), at least one grouting valve (25) is arranged, and the inlet of each grouting valve (25) is connected with the outlet of the peristaltic pump (24) through the conveying hose (23);

the slurry diffusion system comprises at least one grouting pipe (32), the number of the grouting pipes (32) is equal to that of the grouting valves (25), and the grouting pipes correspond to the grouting valves one by one; every grout outlet (33) has been put to the equipartition on slip casting pipe (32) lateral wall, every the geotechnological cloth (34) have all been wrapped up in the slip casting pipe (32) pipe wall outside, every slip casting pipe (32) bottom is the enclosed type, and the top all is connected rather than the conveying hose (23) of slip casting valve (25) exit linkage that corresponds.

2. The microbial riverway bank protection device according to claim 1, wherein the peristaltic pump (24) conveys the slurry (22) in the slurry storage tank (21) to the slurry spreading system, and the peristaltic pump (24) adopts a liquid power conveyor.

3. The microbial riverway bank protection device according to claim 1, wherein the bottom of each grouting pipe (32) is arranged to be pointed, each grouting pipe (32) is vertically pressed into a riverway bank protection bank slope (40), and the grouting pipes (32) which are closer to the boundary of a water bank are shorter.

4. The microbial riverway bank protection device is characterized in that each grouting pipe (32) is connected with the conveying hose (23) connected with the outlet of the corresponding grouting valve (25) in a sealing mode through a sleeve (31) or in a screw fixing and bonding mode.

5. The microbial-modified river bank protection device according to claim 4, wherein the inlet and outlet of the inner wall of the casing (31) are provided with clamping grooves (311), and the outer wall of the outlet of the conveying hose (23) connected with the outlet of each grouting valve (25) and the outer wall of the inlet at the top of each grouting pipe (32) are provided with buckles (312) hermetically connected with the clamping grooves (311).