Device suitable for simulating EICP saturated underwater grouting
By designing the water storage cavity and soil cavity structure inside the transparent model box, the EICP saturated underwater grouting process was simulated, solving the problems of seepage path and soil reinforcement effect, and realizing the optimization and cost control of the on-site grouting method.
Patent Information
- Application Number
- CN202520136907.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing technologies are difficult to effectively simulate and control the seepage path and soil reinforcement effect during EICP saturated underwater grouting. There are many influencing factors and it is difficult to optimize the grouting method.
A simulation device including a transparent model box was designed. The box contains a left water storage cavity, a middle soil cavity, and a right water storage cavity, which are separated by a seepage retaining wall. The retaining gauze is supported by cross ribs. It is equipped with a water injection port, a drainage port, a measuring tape, and a grouting pipe to simulate the soil stress state and seepage path during the grouting process.
It can simulate the reinforcement effect of on-site soil under laboratory conditions, provide guidance on the optimal number of grouting days and frequency, shorten the construction period and control costs.
Smart Images
Figure CN223857212U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a device suitable for simulating EICP saturated underwater grouting belongs to civil engineering technical field. BACKGROUND
[0002] Enzyme-induced calcium carbonate precipitation (EICP) technology can cement loose soil into a certain strength of stone body, because of its environmental friendliness, reaction mechanism and simple reactant, process controllable and other advantages, has broad application prospect in bad soil body reinforcement. EICP solidified soil test usually adopts the way of circulating grouting, that is, bacteria liquid, cementing liquid is circulated and grouted into soil, to induce calcium carbonate to precipitate between soil particles and continuously grow, and the generated calcium carbonate can not only fill soil pores, but also can bear the role of "bridge" under the premise of large volume calcium carbonate crystal and two or more soil particles cementing, and connect loose minerals together.
[0003] But the EICP saturated underwater grouting site range is large, and there are many influencing factors, there are many variables that are difficult to control, such as the seepage path of grouting liquid cannot be studied, it is difficult to study the outdoor grouting days on the reinforcement effect of soil, therefore, the device for simulating EICP saturated underwater grouting has very important significance for guiding field grouting.
[0004] Based on this, the device suitable for simulating EICP saturated underwater grouting is provided. UTILITY MODEL CONTENTS
[0005] In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a device suitable for simulating EICP saturated underwater grouting.
[0006] In order to solve the above technical problems, the technical scheme of the utility model is: a device suitable for simulating EICP saturated underwater grouting, comprising a transparent model box with the box mouth upward, the inside of the model box is composed of a left water storage cavity, a middle soil cavity and a right water storage cavity, wherein the left water storage cavity and the middle soil cavity, the middle soil cavity and the right water storage cavity are all separated by seepage retaining walls, the seepage retaining walls all include a fixed frame, the fixed frame is all covered with soil retaining gauze, and the fixed frame is all provided with cross ribs inside the frame for supporting the soil retaining gauze, the volume of the left and right water storage cavities is equal, and the left and right water storage cavities are all provided with water injection ports and drainage ports, and the outside of the left water storage cavity is vertically and fixedly connected with a scale, and the middle part of the middle soil cavity is vertically provided with a grouting pipe.
[0007] Preferably, the shape of the model box is a cuboid, which is made of acrylic material.
[0008] Preferably, the height of the seepage retaining wall is flush with the box mouth of the model box.
[0009] Preferably, the cross-rib is in the shape of a cross.
[0010] Preferably, a water pipe and a switch valve are installed on the water inlet and the water outlet.
[0011] Preferably, the water inlets are above the water outlets, and the water outlets are at the bottom of the inner cavities of the left and right water storage cavities.
[0012] Preferably, the water inlets and the water outlets between the left and right water storage cavities are at the same height.
[0013] Preferably, the measuring scale is fixedly connected to the corner beside the left water storage cavity.
[0014] Preferably, the top end of the grouting pipe is connected to the storage tank of the EICP treatment liquid through a pipeline and a pressure pump.
[0015] Preferably, a plurality of grouting holes are arranged around the grouting pipe.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] The utility model can simulate the stress state and seepage path of the soil body in the grouting process to some extent, the water head difference of the left and right water storage cavities can quantitatively analyze the soil body reinforcement effect changing with time, and the left and right water storage cavities have important guiding significance for estimating the optimal grouting days and the optimal grouting frequency of the EICP on the soil body. Meanwhile, the utility model can simulate the grouting test of the saturated soil body, and the grouting method and the grouting amount can be improved through the experimental results, so that the cost can be controlled and the construction period can be effectively shortened.
[0018] The utility model will be further explained in detail in combination with the drawings and the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 It is a structure schematic view of the utility model embodiment.
[0020] Fig. 2 It is a use state schematic view of the utility model embodiment.
[0021] In the drawing: model box 1, left water storage cavity 2, middle soil body cavity 3, right water storage cavity 4, seepage retaining wall 5, fixed frame 6, soil retaining gauze 7, cross-rib 8, water inlet 9, water outlet 10, measuring scale 11, grouting pipe 12, pressure pump 13, storage tank 14, grouting hole 15. DETAILED DESCRIPTION
[0022] The utility model will be further explained in combination with the drawings and the specific embodiments.
[0023] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0024] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0025] As shown in Figs. 1-2 The embodiment provides a device suitable for simulating EICP saturated underwater grouting, which comprises a transparent model box 1 with its box opening upward, and the inside of the model box is composed of a left water storage cavity 2, a middle soil body cavity 3 and a right water storage cavity 4, wherein the left water storage cavity and the middle soil body cavity are separated by a seepage retaining wall 5, and the middle soil body cavity and the right water storage cavity are also separated by a seepage retaining wall 5, the seepage retaining wall comprises a fixed frame 6, the fixed frame is covered with a soil retaining gauze 7, and the fixed frame is provided with a cross rib 8 for supporting the soil retaining gauze, the volume of the left and right water storage cavities is equal, and each is provided with a water inlet 9 and a water outlet 10, and a measuring scale 11 is vertically and fixedly connected to the outside of the left water storage cavity, and a grouting pipe 12 is vertically arranged in the middle part of the middle soil body cavity.
[0026] By adopting the cross rib to support the soil retaining gauze, the rigidity of the seepage retaining wall can be improved, and soil collapse can be avoided.
[0027] When the left and right water storage cavities are provided with a certain height of water head difference, the seepage flow can be represented by recording the water level scale change of the low water head water storage cavity in a certain period of time through the measuring scale; when the water head of the left and right water storage cavities is close to the height of the middle soil body and the water head difference is zero, the grouting test of EICP on saturated sand can be simulated after the sand is saturated.
[0028] In the embodiment of the utility model, the fixed frame and the cross rib are all wood materials.
[0029] In the embodiment of the utility model, the shape of the model box is a cuboid, and the model box is made of acrylic material.
[0030] In the embodiment of the utility model, the height of the seepage retaining wall is flush with the box opening of the model box.
[0031] In the embodiment of the utility model, the shape of the cross rib is a cross shape.
[0032] In the embodiment of the utility model, water pipes and on-off valves are installed on the water inlets and water outlets.
[0033] In this embodiment of the utility model, the water inlet is located above the drain outlet, and the drain outlet is located at the bottom of the inner cavity of the left and right water storage chambers.
[0034] In this embodiment of the utility model, the water inlets and drain outlets between the left and right water storage chambers are set at the same height.
[0035] In this embodiment of the invention, the measuring ruler is fixedly connected to the corner on the outer side of the left water storage cavity.
[0036] In this embodiment of the invention, the top end of the grouting pipe is connected to the storage tank 14 of the EICP treatment fluid via a pipe and a pressure pump 13.
[0037] In this embodiment of the utility model, the grouting pipe is provided with a plurality of grouting holes 15 around its periphery.
[0038] In this embodiment of the invention, the working principle of the device suitable for simulating EICP saturated underwater grouting is as follows:
[0039] (1) Before the test begins, it is necessary to fill the soil and pre-embed the grouting pipe. Place the grouting pipe in the center of the soil and carry out the backfilling work. Set the volume of the pre-reinforced soil and prepare EICP treatment liquid with a porosity of 1.2 times the pore volume according to the porosity of the pre-reinforced soil volume.
[0040] (2) At the beginning of the test, water was injected from the left and right sides through the injection port to create a large head difference. The change of the scale of the measuring tape at the low water level was recorded within 1 hour to calculate the seepage flow. After that, the head difference between the left and right sides was kept to zero and the water level was close to the soil surface height. The soil was left to stand for a period of time to saturate the middle soil, while the water level on the left and right sides remained unchanged.
[0041] (3) Inject EICP treatment liquid into the soil through the grouting pipe, and drain excess water and waste liquid through the drainage outlet to ensure the stability of the water level on both sides.
[0042] (4) After a certain number of days of grouting, the water head difference can be formed on the left and right sides again, and the effectiveness of EICP soil reinforcement can be tested by the change in seepage flow.
[0043] (5) After the reinforcement has achieved the desired effect, the pre-reinforced soil can be excavated for further testing.
[0044] The above steps are the key steps in the pre-test of soil reinforcement on site using the device that simulates EICP saturated underwater grouting. Through these steps, the device can make a preliminary prediction of the optimal number of grouting days and the optimal grouting frequency for EICP-treated soil.
[0045] The above merely describes preferred embodiments of the present application, but is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application and according to the technical essence of the present application still falls within the protection scope of the technical solution of the present application.
Claims
1. A device suitable for simulating EICP saturated underwater grouting, characterized in that: The utility model provides a transparent model box with the box mouth upwards, which is composed of a left water storage cavity, a middle soil body cavity and a right water storage cavity.
2. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: The model box is a cuboid made of acrylic material.
3. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: The height of the seepage retaining wall is flush with the box mouth of the model box.
4. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: The cross rib is cross-shaped.
5. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: Water pipes and on-off valves are installed on the water inlet and the water outlet.
6. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: The water inlet is above the water outlet, and the water outlet is at the bottom of the left and right water storage cavities.
7. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: The water inlets and the water outlets between the left and right water storage cavities are at the same height.
8. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: The measuring scale is fixedly connected to the corner on the outside of the left water storage cavity.
9. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: The top end of the grouting pipe is connected to the storage tank of EICP treatment liquid through a pipeline and a pressure pump.
10. The device suitable for simulating EICP saturated underwater grouting according to claim 1, characterized in that: A plurality of grouting holes are arranged around the grouting pipe.