Device and method for detecting grouting filling amount of foundation pit support

Abstract

The invention discloses a device and method for detecting the grouting filling amount of a foundation pit support, and belongs to the technical field of grouting detection. A device for detecting the grouting filling amount of a foundation pit support comprises an outer protection pipe matched with a detection hole and a layered detection structure arranged in the outer protection pipe. The layered detection structure comprises a plurality of casing pipes with the top ends flush and the bottom ends arranged in a staggered mode and a plurality of insertion pipes arranged in the casing pipes respectively. The lower end of the sleeve is opened in the first-stage layer, and the lower end of the insertion pipe is correspondingly provided with a surrounding hole opening section. The device is convenient to use, can detect the grouting effect at any time, can detect the grouting effects of different depths, is accurate in obtained data, is real and reliable in detection result, and is easy to popularize and use.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting detection, and particularly to a detection device and method for the grouting filling volume of foundation pit support grouting. Background Technique

[0002] Support grouting reinforcement is to drive grouting pipes at the designed positions at a certain spacing, angle and depth, and inject a slurry (generally cement slurry, chemical slurry, mixed slurry) prepared from certain materials into the formation or cracks through a pressure feeding device to make it diffuse, gel or solidify, which has the functions of reinforcing and water stopping for surrounding rocks, foundations and slopes, ensuring the smooth progress of construction or improving the engineering quality. It is commonly used in projects such as foundation pit excavation support, cutting slope support, and shallow tunneling. Generally, soil nail wall support grouting, steel pipe grouting, micro piles, etc. are used to reinforce the foundation; to prevent the foundation pit from instability and collapse, causing casualties and economic losses.

[0003] The conventional detection methods are: after waiting for the grouting to solidify, the core drilling method or the non-destructive ground penetrating radar method is adopted. The core drilling inspection method has a time lag, and it is very difficult to rework if the detection is unqualified; although the ground penetrating radar method has non-destructive detection and is simple and convenient, sometimes there is distortion and it is difficult to guarantee the reliability of the data. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of deficiencies in grouting detection in the prior art, and to propose a detection device and method for the grouting filling volume of foundation pit support grouting.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A detection device for the grouting filling volume of foundation pit support grouting, comprising: an outer protection tube adapted to a detection hole, and a layered detection structure disposed inside the outer protection tube; The layered detection structure includes: a plurality of sleeves with their tops flush and their bottoms arranged in a stepped manner, and a plurality of inserted pipes respectively disposed inside the sleeves; The lower end of the sleeve is opened in a primary layer, and the lower end of the inserted pipe is correspondingly provided with a circumferential opening section.

[0006] In some embodiments, the outer protection tube is a perforated tube, and reserved holes are uniformly opened on the surface.

[0007] In some embodiments, the layered detection structure further includes: a plurality of partition plates; a primary layer space is formed between two adjacent partition plates; The bottom ends of the sleeves are respectively located in different layers and are only connected to that layer.

[0008] In some embodiments, an outer ring matching the inner diameter of the outer protection tube is provided on the outer side of the partition plate.

[0009] In some embodiments, the bottom end of the intubation tube is closed, and a plugging block is arranged inside; The lower end of the plugging block is higher than the top end of the opening of the intubation tube.

[0010] In some embodiments, the surrounding opening section is filled with: corresponding geological soil layer materials, or graded fine aggregate.

[0011] In some embodiments, a sealing ring is arranged outside the intubation tube at a position corresponding to the upper part of the surrounding opening section.

[0012] A method for detecting the grouting filling amount of foundation pit support includes the following steps: S1. Select a monitoring position and drill a detection hole; S2. Place an outer protection tube into the detection hole; S3. Install a layered detection structure into the outer protection tube; S4. As the grouting operation progresses, the grout penetrates through the outer protection tube and the casing and enters the intubation tube; S5. Remove the casing, check the state, and obtain the data result of the grouting filling amount.

[0013] In some embodiments, it further includes: S6. Continue the detection; if continuous monitoring is required, place the casing back into the intubation tube; Among them, before placing it back, according to the detection requirements, select to update the material in the casing or continue to use the original material.

[0014] In some embodiments, it further includes: S7. Clean and reserve; after the grouting is completed, take out the outer protection tube and the layered detection structure, clean the grouting material, and wash it clean for reuse.

[0015] Compared with the prior art, the present invention provides a device and method for detecting the grouting filling amount of foundation pit support, and has the following beneficial effects.

[0016] 1. The present invention is convenient to use, can detect the grouting effect at any time, can detect the grouting effect at different depths, the obtained data is accurate, the detection result is true and reliable, and it is easy to promote and use.

[0017] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the present invention. Brief Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a top view structural schematic diagram of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the outer protection pipe.

[0021] Figure 4 It is a schematic structural diagram of the layered detection structure.

[0022] Figure 5 It is a schematic diagram of the usage state of the casing pipe.

[0023] Figure 6 It is a schematic structural diagram of the partition plate.

[0024] Figure 7 It is a schematic structural diagram of the casing pipe.

[0025] Figure 8 It is a schematic diagram of the usage state of the intubation tube.

[0026] Figure 9 It is a schematic structural diagram of the intubation tube Figure 1 .

[0027] Figure 10 It is a schematic structural diagram of the intubation tube Figure 2 .

[0028] Figure 11 It is a schematic cross-sectional structural diagram of the intubation tube.

[0029] Figure 12 It is a flowchart of the present invention.

[0030] In the figure: 1. Outer protection pipe; 2. Casing pipe; 3. Intubation tube; 31. Surrounding opening section; 4. Partition plate; 5. Outer ring; 6. Plugging block; 7. Sealing ring. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] Referring to Figure 1-11 , a detection device for the grouting filling amount of a foundation pit support includes: an outer protection pipe 1 that cooperates with a detection hole, and a layered detection structure disposed inside the outer protection pipe 1.

[0033] Among them, the outer protection pipe 1 is a pipe body that penetrates up and down and is inserted into the detection hole; preferably, a steel pipe or an iron pipe is used.

[0034] It can be understood that the detection hole formed by drilling is prone to situations such as blocked holes and collapsed holes; the designed outer protection pipe 1 is used to protect the detection hole; the outer protection pipe 1 is a metal component, and the pipe diameter size is selected according to the drilling hole diameter and is a hollow through structure.

[0035] In addition, the outer protection tube 1 is a slotted tube, and reserved holes are evenly formed on the surface.

[0036] As Figure 2 shown; round holes with a certain spacing are provided on the outer wall of the outer protection tube 1, the diameter of the round holes is about 2-3 cm, and the longitudinal spacing is about 10-20 cm, so that the slurry in the surrounding rock or foundation can flow into the outer protection tube 1 through the holes; it can be understood that the size and spacing of the openings can be adjusted according to the use environment; at the same time, the length of the outer protection tube 1 is set in cooperation with the drilling depth and detection requirements.

[0037] Optionally, a closing plate is provided at the bottom end of the outer protection tube 1; this can prevent some soil and stone from entering from the lower part and ensure the usability of the internal space.

[0038] In some embodiments, the layered detection structure includes: a plurality of sleeves 2 with their tops flush and their bottoms arranged in a stepped manner, and a plurality of inserting tubes 3 respectively placed inside the sleeves 2; at the same time, the lower end of the sleeve 2 is open within a first-level layer, and a circumferential opening section 31 communicating with the outside is correspondingly provided at the lower end of the inserting tube 3.

[0039] Thus, the plurality of sleeves 2 form different depths; in cooperation with the inserting tubes 3 placed therein, the grouting conditions at different depths are detected.

[0040] Preferably, the diameter of the sleeve 3 is 3-5 cm.

[0041] It should be noted that the lower ends of the sleeve 2 and the inserting tube 3 are closed; in the installed state, the inserting tube 3 is completely inserted into the bottom of the sleeve 2.

[0042] It should also be noted that the top end of the inserting tube 3 is higher than the sleeve 2 for convenient removal.

[0043] Preferably, a sealing ring 7 is provided at the position above the circumferential opening section 31 on the outside of the inserting tube 3.

[0044] Thus, the sealing between the inserting tube 3 and the sleeve 2 is strengthened, and the spread of the slurry above the gap between the two is avoided.

[0045] In some embodiments, the opening of the sleeve 2 is a plurality of circumferentially arranged long slits to increase the slurry flow area; the openings of the circumferential opening section 31 are circumferentially dense holes, and the top ends of the openings are not lower than the long slits.

[0046] During use, after the slurry passes through the openings of the outer protection tube 1, it enters the circumferential opening section 31 of the inserting tube 3 through the sleeve 2; information is obtained by observing the slurry state of the inserting tube 3.

[0047] Furthermore, a plugging block 6 is arranged inside the inserting tube 3.

[0048] Among them, the space between the closed bottom end of the insertion tube 3 and the plugging block 6 is used for the entry of grout.

[0049] It should be noted that the lower end of the plugging block 6 is higher than the top end of the observation opening of the insertion tube 3 of the insertion tube 3.

[0050] In some embodiments, the bottom end of the insertion tube 3 is closed by a detachable bottom cover.

[0051] Preferably, the bottom cover is installed in a threaded connection form; specifically, internal threads are provided on the inner wall of the bottom end of the insertion tube 3, and a mating section with external threads is provided at the upper end of the bottom cover; of course, threads can also be provided on the outer wall of the bottom end of the insertion tube 3, and the bottom cover is threadedly assembled on the outside to achieve threaded cooperation.

[0052] Thus, operations such as loading materials into and removing from the insertion tube 3 and cleaning can be conveniently carried out.

[0053] In some embodiments, the insertion tube 3 is assembled from two symmetrical parts.

[0054] Correspondingly, the plugging block 6 is fixedly connected to one part and is movably mated with the other part; at this time, the bottom cover is preferably in an externally assembled form.

[0055] In some embodiments, the top end of the insertion tube 3 is set to be closed to prevent foreign objects from entering.

[0056] It can be understood that if the top end is not set to be closed, it will not affect the use either; it just needs to pay more attention to cleaning the inside.

[0057] In some embodiments, there is a threaded fit between the outer side of the top end of the insertion tube 3 and the inner side of the top end of the sleeve 2; thus, the insertion tube 3 and the sleeve 2 can be mechanically connected together.

[0058] Preferably, at this time, a hexagonal hole or other structure is provided on the closed top end of the insertion tube 3 to facilitate the operation of screwing in and out with tools.

[0059] In some embodiments, the layered detection structure further includes: a plurality of partition plates 4; As Figure 4 、 5 shown, a primary layered space is formed between two adjacent partition plates 4.

[0060] Thus, the bottom ends of the sleeves 2 are respectively located in different layers and are only connected to that layer.

[0061] Correspondingly, the circumferentially perforated sections 31 of the insertion tubes 3 of the sleeves 2 are distributed between layers at different depths.

[0062] Furthermore, an outer ring 5 matching the inner diameter of the outer protection tube 1 is provided on the outer side of the partition plate 4; to enhance the sealing performance and stability.

[0063] It is understandable that the thickness of the partition board 4 is limited and the contact surface with the outer protection pipe 1 is small. By adding an outer ring 5, the contact surface can be significantly increased and the placement can be more stable.

[0064] Preferably, the outer ring 5 is a rubber ring; by utilizing its deformation characteristics, the sealing and isolation effect between layers can be further enhanced. Alternatively, the outer ring 5 is a metal ring, and a sealing groove is opened on its outer ring to install sealing parts such as a sealing ring.

[0065] In some embodiments, the surrounding opening section 31 is filled with corresponding geological soil layer materials, which conforms to the actual environment.

[0066] It should be noted that if it is not convenient to use the corresponding geological soil layer materials, graded fine stones are filled in the surrounding opening section 31.

[0067] During use: When grouting the foundation pit or slope, the grout fills the gaps in the soil layer or rock layer. When it flows through the detection hole area at the same time, it flows into the interior through the reserved hole of the outer protection pipe 1. At the same time, it enters the sleeve 2 and the inserted pipe 3 again and combines with the filling material. The grouting holes at different depths penetrate into the outer protection pipes 1 at different layers and can flow into different inserted pipes 3. During the grouting process at different depths, by removing the inserted pipe 3 and disassembling the surrounding opening section 31, the height of the grouting liquid and the solidification effect in the inserted pipe 3 can be directly observed. By measuring data such as the height, the quality of the material, and the volume of the surrounding opening section 31, the filling volume of the grout can be calculated. The material in the surrounding opening section 31 can be updated at any time and inserted into the sleeve for detection. This application can guide in real time whether the grouting process meets the requirements and whether to continue grouting, saving grouting time and grouting costs, and providing data support for the grouting process in real time.

[0068] This device can be directly processed into finished products in the factory or can be processed and welded by itself; it provides convenient physical data for the detection of the grouting filling volume. This application also provides a detection method; it has the advantages of being easy to use, real-time viewing, convenient and fast, reusable, long service life, and strong guidance, and has obvious advantages in foundation treatment.

[0069] Referring to Figure 12 , a detection method for the grouting filling volume of foundation pit support uses the aforementioned detection device.

[0070] It includes the following steps: S1. Select the monitoring position and drill a detection hole. S2. Place the outer protection pipe 1 into the detection hole. S3. Install a layered detection structure into the outer protection pipe 1. S4. As the grouting operation progresses, the grout penetrates through the outer protection pipe 1 and the sleeve 2 and enters the inserted pipe 3. S5. Take out the casing and check its status, including the height of the slurry and the curing effect, and obtain the data of the grouting filling volume. S6. Continue the detection. If continuous monitoring is required, put the casing back into the insertion pipe. Among them, before putting it back, according to the detection requirements, choose to update the material in the casing or continue to use the raw material. S7. Clean and reserve. After the grouting is completed, take out the outer protection pipe and the layered detection structure, clean the grouting material, and wash it clean for reuse.

[0071] During the operation: First, select the detection position, drill a detection hole, and construct it together with the grouting process; after the drilling is completed, install the outer protection pipe 1, and then install the layered detection structure; the outer ring 5 on the layered detection structure can be closely attached to the outer protection pipe to ensure that both ends of each layer are tightly sealed; at the same time, there is a casing 2 with an opening in each layer within this range, and this casing 2 cannot communicate between other closed layers, ensuring the independence of each casing 2; there is an inner insertion pipe 3 mechanically connected inside the insertion pipe 2, and relevant materials (corresponding geological soil layer materials or filled graded fine stones) are filled in the insertion pipe 3. The insertion pipe 3 cooperates with the casing 2 and can just be inserted into the corresponding casing; the entire device is installed; after the grouting is completed, all the insertion pipes and the casing structure can be taken out, the grouting material can be cleaned, and it can be washed clean for reuse.

[0072] The present invention provides a detection device and method for the grouting filling volume of foundation pit support, which is convenient to use, reusable, and has obvious and intuitive detection effects; during the grouting process, it can detect the grouting effect at any time, and timely adjust the grouting volume and grouting pressure to ensure that the grouting is in place at one time and avoid secondary rework; it can also detect the grouting effects at different depths, greatly shortening the overall time of the entire process; it can also be mutually verified with the detection data of ground penetrating radar to improve the accuracy of the foundation reinforcement effect; this detection method is simple, the device is easy to process, light in weight, and convenient to install.

[0073] Compared with the prior art, the present invention has at least the following beneficial effects: 1) It can effectively solve the problem in the prior art that the state of the foundation slurry filling volume cannot be observed in real time; by taking out the inner insertion pipe, observing the filling degree of the slurry, and determining the quality problems existing in the grouting process, so as to timely adjust the grouting volume and grouting pressure. 2) By setting different layers, the slurry filling effects at different depths and different rock layers can be detected, providing a basis for the slurry mix ratio and grouting pressure.

[0074] 3) The structure of the present invention is simple, assembled with mother and son steel casings, the required materials are easy to obtain, and it is also easy to process and manufacture. Most of them are made of steel or stainless steel, with high stiffness, corrosion resistance, and can be reused. 4) The detection method provided by the present invention is simple to operate, the obtained data is accurate, the detection results are true and reliable, and it is easy to promote and use.

[0075] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

[0076] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for detecting the filling amount of grouting for foundation pit support, characterized in that: include: An outer protective tube (1) matched with the detection hole, and a layered detection structure placed in the outer protective tube (1); The layered detection structure comprises: a plurality of sleeves (2) with top ends aligned and bottom ends arranged in staggered layers, and a plurality of cannulas (3) respectively inserted into the sleeves (2); The lower end of the sleeve (2) is open in the first-level layer, and the lower end of the insertion tube (3) is correspondingly provided with a surrounding opening section (31).

2. The detection device for the filling amount of foundation pit support grouting according to claim 1 is characterized in that: The outer protective tube (1) is a flower tube, and reserved holes are evenly arranged on the surface.

3. The detection device for the filling amount of foundation pit support grouting according to claim 1 is characterized in that: The layered detection structure further comprises: a plurality of interlayer plates (4); a primary layered space is formed between two adjacent interlayer plates (4); The bottom ends of the sleeves (2) are respectively located in different layers and are connected only to the layers.

4. The detection device for the filling amount of foundation pit support grouting according to claim 3 is characterized in that: An outer ring (5) matching the inner diameter of the outer protective tube (1) is provided on the outer side of the partition plate (4).

5. The device for detecting the filling amount of grouting for foundation pit support according to claim 1 is characterized in that: The bottom end of the cannula (3) is closed, and a blocking block (6) is provided inside. The lower end of the blocking block (6) is higher than the top end of the opening of the cannula (3).

6. The detection device for the filling amount of grouting for foundation pit support according to claim 1 is characterized in that: The surrounding opening section (31) is filled with: corresponding geological soil layer material, or graded fine stone.

7. The detection device for the filling amount of grouting for foundation pit support according to claim 1 is characterized in that: A sealing ring (7) is provided on the outside of the insertion tube (3), corresponding to the upper position surrounding the opening section (31).

8. A method for detecting the filling amount of grouting for foundation pit support, characterized in that: The detection device according to any one of claims 1 to 7 comprises the following steps: S1. Select the monitoring location and drill the detection holes; S2. Place the outer protective tube into the detection hole; S3. Install a layered detection structure inside the outer protective tube; S4. As the grouting operation proceeds, the slurry passes through the outer protective pipe and casing and enters the insert pipe; S5. Take out the casing, check the status, and obtain the grouting filling volume data.

9. The method for detecting the filling amount of foundation pit support grouting according to claim 8, characterized in that: Also includes: S6. Continue testing; if further monitoring is required, put the cannula back into the cannula; Among them, before putting it back, according to the inspection requirements, choose to update the material in the casing or continue to use the original material.

10. The method for detecting the filling amount of foundation pit support grouting according to claim 8 or 9, characterized in that: Also includes: S7. Clean and prepare for use: After the grouting is completed, take out the outer protective tube and the layered detection structure, clean the grouting material, and wash them clean for reuse.

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