Loess site anti-collapse device and installation equipment

Abstract

The invention belongs to the technical field of loess site anti-collapse construction, and relates to a loess site anti-collapse device and installation equipment. Water injection operation is cooperated by introducing the hole wall rubber sleeve water injection auxiliary device, an original mode of filling stones into a hole is replaced, the water delivery path is optimized while the water delivery efficiency is guaranteed, and therefore homogeneous water injection within the field design water injection depth range is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of loess site anti-collapse construction, and relates to a loess site anti-collapse device and installation equipment. Background Art

[0002] At present, water injection and humidification are often used in advance for loess sites with strong collapsible properties. Subsequent reinforcement work is carried out when the site reaches the water content standard. It is particularly important to control the uniformity of the water delivery process in the process flow, but it is difficult to achieve homogenized water injection with existing means. The reason is that the water injection holes formed in the collapsible loess site encounter water during the water delivery process, resulting in a concentrated collapse of the water injection area. The collapse will cause the designed humidification path in the area to change. The uniform humidification process from shallow to deep layers gradually changes to shallow water shortage and excessive concentration of deep water, showing a point-like distribution characteristic. There is a big difference from the expected averaged water injection. If the water content and uniformity of the construction site cannot meet the corresponding standards after humidification treatment, it is difficult to significantly improve the reinforcement effect of the subsequent process without a significant change in the soil properties.

[0003] In order to meet the water delivery effect of the water injection hole, the current project adopts the method of filling the water injection hole with large-size lightweight stones, which can support the wall of the water injection hole and guide the water delivery path. This method has certain defects. First, the density of lightweight stones is low and the loose filling in the hole cannot effectively support the hole wall. After the hole is formed, the deep soil layer often shrinks in the absence of support (the deep soil body often shrinks after the hole is formed due to the large internal stress of the site). The shrinkage changes the flow of water and has a certain impact on the water injection effect of the bottom layer. Secondly, the site itself has a strong collapsible property. Even if the injection hole is filled with poured stones, the collapsible loess around the injection hole collapses when it touches the water during the water injection process. The formed cavity will destroy the formed water injection hole, greatly affecting the support and water delivery capacity of the stones in the hole, and even changing the water delivery path. The above situations will have a great impact on the water injection effect of the site. Summary of the invention

[0004] The present invention introduces a hole wall rubber sleeve water injection auxiliary device to coordinate water injection operations, replacing the original method of pouring stones into the hole, ensuring water delivery efficiency while optimizing the water delivery path to achieve homogenized water injection within the designed water injection depth range of the site. The technical solution is:

[0005] A loess site anti-collapse device comprises a hole wall rubber sleeve, both ends of which are fixed by a reel, compacted fly ash is provided at the bottom of the hole wall rubber sleeve, hardened rubber capsules and fly ash capsules are provided on the hole wall rubber sleeve located on the reel, the hardened rubber capsules and fly ash capsules are on the same longitudinal plane, and the fly ash capsules are located at the bottom of the hole wall rubber sleeve and above the compacted fly ash; the hole wall rubber sleeve is provided with a hydrophobic hole; the hydrophobic hole and the hardened rubber capsules and fly ash capsules are spaced apart in the longitudinal direction; the hole wall rubber sleeve extends into the water injection hole through the opening of the water injection bottom lining plate under the action of an external driving device.

[0006] Preferably, the bottom of the hole wall rubber sleeve is a conical structure or a horizontal structure, and the vertical distance from the top opening to the bottom is z, and z is 5-20m. The hole wall rubber sleeve is made of natural latex, and the hole wall rubber sleeve is provided with a hydrophobic hole d1 with a diameter of 5-10cm.

[0007] Preferably, the hardened glue capsule includes mixed glue A and mixed glue B, and the mixed glue A and mixed glue B are respectively located in two chambers; the mixed glue A is acrylic epoxy resin or cyanoacrylate glue; and the mixed glue B includes modified amine.

[0008] Preferably, the fly ash capsules are arranged in at least one circle in a circular manner in the lateral direction of the hole wall rubber sleeve, and the bottom circle is located at the bottom of the hole wall rubber sleeve and above the compacted fly ash.

[0009] Preferably, the top of the hole wall rubber sleeve is fixed to the opening of the water injection bottom lining plate through a lining plate connecting buckle, the water injection bottom lining plate is provided with a drain hole, the drain hole diameter d2 is 3-5cm, and the four sides of the water injection bottom lining plate are connected to the water cut-off plate.

[0010] A device for installing a hole wall rubber sleeve comprises a steel cone, a steel sleeve is arranged on the steel cone, at least one hinge groove is arranged on the steel sleeve, a rubber pad is arranged in the hinge groove, one end of the hinge is installed in the hinge groove, and the other end is connected to a rolling ball, the rolling ball is made of metal; a connecting shaft is arranged above the steel cone, and the connecting shaft is connected to a power device.

[0011] Preferably, the bottom of the steel sleeve is provided with a tip, a stopper 1 is provided above the hinge groove, a stopper 2 is provided on the horizontal end surface of the steel sleeve, and the rolling ball is located between the stopper 1 and the stopper 2. Preferably, the steel sleeve is wrapped around the outside of the steel cone, and the steel tip of the steel cone is left outside, and the angle of the tip of the steel sleeve at the junction of the two is 10-45 degrees; the stopper 1 is an L-shaped structure, the length l of its limit side is r≤l≤l / 2, and the radius of the rolling ball is r.

[0012] Preferably, when in use, the steel cone and the hole wall rubber sleeve are driven into the soil together, and the steel cone is lifted up after it reaches the target position;

[0013] When the steel cone is lifted up, the rolling rolling ball will crush the capsule containing loose fly ash, so that the loose fly ash adheres to the surface of the steel cone, and then continue to move upward, crushing the capsule containing hardening glue, and fixing and hardening the hole wall rubber sleeve through the hardening glue.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention adopts the form of hardened hole wall rubber sleeve to replace the existing process of filling stones in the water injection hole, shortens the operation time, effectively improves the hole quality of the water injection hole, ensures the drainage efficiency, improves the uniformity of water injection, improves soil conditions, and achieves carbon fixation and emission reduction.

[0016] 2. The matching driving device of the hole wall rubber sleeve has simple structure, easy use and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the operation interval diagram of the water injection process of the present invention.

[0018] Figure 2a It is a schematic diagram of the working site of the present invention.

[0019] Figure 2b It is a cross-sectional view of the working site of the present invention.

[0020] Figure 3a This is the front view of the hole wall rubber sleeve.

[0021] Figure 3b This is an elevation view of the hole wall rubber sleeve when not in use.

[0022] Figure 4a This is a three-dimensional diagram of the rear hole wall rubber sleeve after use.

[0023] Figure 4b This is the structural diagram of the hole wall rubber sleeve.

[0024] Figure 4c Schematic diagram of the location of the hardening glue capsule and the fly ash capsule.

[0025] Figure 5 It is a diagram of the mode of action of the present invention.

[0026] Figure 6 It is a diagram of the mechanism of action of the present invention.

[0027] Figure 7 This is a schematic diagram of the installation equipment.

[0028] Figure 8 This is a partial diagram of the installation equipment.

[0029] Fig. 9 This is a cross-sectional view of the installation equipment.

[0030] In the figure, 1-hole wall rubber sleeve, 2-water injection bottom lining plate, 3-water injection hole, 4-water cut-off plate, 5-cofferdam, 6-drain hole, 7-hardening rubber capsule, 8-liner connecting buckle, 9-reel, 10-compacted fly ash, 11-fly ash capsule.

[0031] 3-1 steel cone, 3-2 steel sleeve, 3-3 hinge, 3-4 rolling ball, 3-5 limiter 1, 3-6 limiter 2, 3-7 hinged hinge, 3-8 connecting shaft, 3-9 anchor bolt, 3-10 anchor bolt fixing part, 3-11 fitting rubber, 3-12 hinged hinge point. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work should belong to the scope of protection of the present invention. The structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are enlarged for the purpose of clear expression, and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are only exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0033] refer to Figures 1 to 6 The anti-collapse device for water injection hole operation during humidification of loess sites described in the present invention comprises a hole wall rubber sleeve, both ends of the hole wall rubber sleeve are fixed by a reel, compacted fly ash is provided at the bottom of the hole wall rubber sleeve, and hardened rubber capsules and fly ash capsules are provided on the hole wall rubber sleeve on the reel, the hardened rubber capsules and fly ash capsules are on the same longitudinal plane, and the fly ash capsules are located at the bottom of the hole wall rubber sleeve and above the compacted fly ash; the hole wall rubber sleeve is provided with hydrophobic holes; the hydrophobic holes and the hardened rubber capsules and fly ash capsules are spaced apart in the longitudinal direction (with the center of the circle as the axis, at an angle of 45°); the fly ash capsules are located in at least one circle in a circular manner in the transverse direction of the hole wall rubber sleeve, and the bottom circle is located at the bottom of the hole wall rubber sleeve and above the compacted fly ash (about 30 to 40 cm).

[0034] The hole wall rubber sleeve extends into the water injection hole through the opening of the water injection bottom lining plate under the action of an external driving device.

[0035] The bottom of the hole wall rubber sleeve is a conical structure or a horizontal structure, and the vertical distance from the top opening to the bottom is z, and z is 5-20m. The hole wall rubber sleeve is made of natural latex, and a hydrophobic hole d1 with a diameter of 5-10cm is provided on the hole wall rubber sleeve.

[0036] The hardening glue capsule includes mixed glue A and mixed glue B, and the mixed glue A and mixed glue B are respectively located in two chambers; the mixed glue A includes acrylic epoxy resin; and the mixed glue B includes modified amine.

[0037] The top of the hole wall rubber sleeve is fixed to the opening of the water injection bottom lining plate through a lining plate connecting buckle. The water injection bottom lining plate is provided with a drain hole, and the diameter d2 of the drain hole is 3-5 cm. The four sides of the water injection bottom lining plate are connected to the water cut-off plate.

[0038] It should be noted that the hole wall rubber sleeve: the hole wall rubber sleeve is provided with a hydrophobic hole on its side wall, and the hole wall rubber sleeve is the main supporting component of the auxiliary device. When not in use, the hole wall rubber sleeve can be rolled up and compressed. The length of the hole wall rubber sleeve can be adjusted according to the designed water injection depth of the site. The length of the hole wall rubber sleeve is 5-20m. The material of the hole wall rubber sleeve is natural latex, which has high elasticity and slight plasticity at room temperature, and crystallizes and hardens at low temperature. It has good alkali resistance, but not strong acid resistance. As the steel cone is driven into the soil, the hole wall rubber sleeve is placed in the soil.

[0039] In addition, the hole wall rubber sleeve needs to be used in conjunction with the hardening rubber. After the steel cone is driven into the expected depth, the steel cone is pulled out upward. During the pulling out process, the rolling rolling ball of the driving equipment is activated under the action of friction. During the rolling process, the rolling ball first breaks the capsule containing loose fly ash, followed by the hardening rubber capsule. After the mixed rubber A and the mixed rubber B in the hardening rubber capsule are blended and mixed, the effect of rapid hardening is achieved. Under the action of the hardening rubber, the original loose hole wall rubber sleeve is fixed and hardened.

[0040] The hardening adhesive used includes two parts, namely, mixed adhesive A and mixed adhesive B. Mixed adhesive A is acrylic epoxy resin, containing catalysts and other additives. Mixed adhesive B is composed of modified amine or other hardeners, containing catalysts or other additives.

[0041] Built-in fly ash: Built-in fly ash is divided into loose fly ash and compacted fly ash. The fly ash used is fly ash that has been treated with heavy metal removal. The loose fly ash is located in the first capsule at the bottom of the hole wall rubber sleeve, which can reduce the friction during the lifting process of the steel cone and effectively prevent the hardened glue from adhering to the steel cone. The compacted fly ash is located at the bottom of the hole wall rubber sleeve, which can effectively reduce the impact and friction on the bottom of the hole wall rubber sleeve during the driving process of the steel cone. Secondly, the configured fly ash is treated with heavy metal removal, and flows into the site soil through the water injection and drainage process, neutralizing the excessive alkalinity in the saline soil, thereby improving the soil.

[0042] In order to prevent the hardened glue from adhering to the steel cone, the present invention arranges a fly ash capsule at the bottom of the hole wall rubber sleeve. When the steel cone penetrates into the target position and starts to lift up, the first capsule that is crushed is a capsule filled with loose fly ash. The loose fly ash adheres to the surface of the steel cone and gradually disperses to the crushed surface of the hardened glue during the lifting process, thereby reducing the friction between the steel cone and the hardened glue.

[0043] Water injection bottom liner: The water injection bottom liner uses conventional industrial latex materials and has a high deformation capacity to adapt to terrain changes. Its main function is to form a closed water injection area and guide the direction of water injection. After the water injection auxiliary device is installed, the water injection bottom liner is installed to form a complete water injection area.

[0044] Figure 7 As shown, a driving device for installing a rubber sleeve on a hole wall comprises a steel cone, a steel sleeve is provided on the steel cone, at least one hinge groove is provided on the steel sleeve, a rubber pad is provided in the hinge groove, one end of the hinge is installed in the hinge groove, and the other end is connected to a rolling ball, the radius of the rolling ball is r, and the size of the rolling ball can be replaced according to the usage scenario.

[0045] The steel sleeve 3-2 includes two semicircular components. First, the two semicircular components are hinged by the connecting hinge 3-12. After the connecting hinge 3-12 is installed, the cone head of the water injection hole steel cone is placed inside the steel sleeve 3-2 to ensure that the cone head of the steel cone fits completely with the rubber 3-11 inside the steel sleeve. After ensuring that the fit is complete, the steel sleeve is sealed with a connecting hinge. After sealing, check whether the installation effect is up to standard. In order to ensure the safety of the hinge connection, an anchor bolt 3-9 fixing is added to the outer edge of the hinge. After checking that the installation effect is up to standard, a secondary fixation is performed on the basis of the hinge connection through the anchor bolt 3-9, and the anchor bolt fixing 3-10 is installed on the steel sleeve 3-2. Prevent the auxiliary device from failing due to unstable installation during the operation.

[0046] The bottom of the steel sleeve is provided with a pointed portion, a limiter 1 is provided above the hinge groove, a limiter 2 is provided on the horizontal end surface of the steel sleeve, and the rolling ball is located between the limiter 1 and the limiter 2. When in use, the limiter 1 and the limiter 2 ensure that the rolling ball can crush the hardened rubber capsule and the fly ash capsule.

[0047] The steel sleeve is wrapped around the outside of the steel cone, and the steel tip of the steel cone is left outside it, and the angle of the tip of the steel sleeve at the junction of the two is 10-45 degrees; the limiter 1 is an L-shaped structure, and the length l of its limiting side is r≤l≤l / 2.

[0048] Figure 5-6 As shown, a method for using a hole wall rubber sleeve comprises the following steps:

[0049] 1) Determine the water injection depth of the site according to the design plan;

[0050] 11) Evaluation results of the site's collapsibility in combination with the site geological survey report;

[0051] 12) Combined with the site design data, determine the depth of water injection and humidification treatment required in each area of ​​the site;

[0052] 2) Plan the water injection area;

[0053] 21) Classification according to the different depths of humidification treatment;

[0054] 22) For the area with the same humidification treatment depth, water injection block planning is carried out (through cofferdam water injection block), with 5m*5m as one water injection block.

[0055] 3) Select the specifications of the instrument and process the steel cone head;

[0056] 31) Select steel cones of corresponding specifications according to the water injection depth;

[0057] 32) A rolling ball is provided at the cone head of the steel cone;

[0058] 33) Check whether the rolling ball is working normally.

[0059] 4) Pre-placement auxiliary devices;

[0060] 41) Locate the injection holes in each 5m*5m water injection block, obtain the injection hole placement points, and mark them;

[0061] 42) Determine the travel path of the construction machinery, and then arrange the auxiliary device for water injection hole operation in the process of humidifying the loess site along the travel path.

[0062] 5) Regional drilling operations;

[0063] 51) Move the operating machinery to the water injection hole stakeout point;

[0064] 52) When there are auxiliary devices, pour the materials one by one in the order of points;

[0065] Among them: the corresponding machinery is selected for different treatment depths with a limit of 5m, 10m, 15m, and 20m. Among them, the water injection hole operation within the three limits of 5m, 10m and 15m is a one-time operation, and the device is placed during the drilling operation; the water injection hole above 20m is a two-time operation, and the device is not placed in the first pre-drilling; the auxiliary device for water injection hole operation in the loess site humidification process described in the present invention is placed during the second operation.

[0066] 6) Install the water-filled bottom liner;

[0067] 61) After all the water injection holes in the 5m*5m water injection block are constructed, install the water injection bottom lining plate in the block;

[0068] 62) Lay the water injection bottom lining plate flat in the middle of the 5m*5m water injection block;

[0069] 63) Align the reserved holes of the water injection bottom lining plate with the water injection hole position;

[0070] 64) Insert the lining plate connecting buckle into the reserved hole;

[0071] 65) Check the integrity and tightness of the connection.

[0072] 7) Water injection operation;

[0073] 71) Inject water according to the designed water injection volume in the water injection block, control the water injection rate, and evenly inject water into the water injection holes in the water injection block, and inject part of the water into the water injection bottom lining plate;

[0074] 72) After all the water is injected, wait for the water to fully dissipate into the soil;

[0075] 73) Leave the soil at rest for 1-2 days to check whether it is suitable for subsequent operations;

[0076] 74) When the subsequent operation conditions are met, the water injection bottom liner can be folded up and circulated to the next water injection site for use;

[0077] 75) Complete all site water injection operations.

[0078] The hole wall rubber sleeve is designed with natural latex as raw material. Natural latex can be naturally degraded. During construction, the hole wall rubber sleeve driven into the soil does not need to be removed, further reducing the impact on the environment.

[0079] The mixed rubber design is adopted, that is, it maintains a fluid state when it is unmixed; after blending and mixing, it achieves a rapid hardening effect, so that the hole wall rubber sleeve can be transported in a compressed state, thereby improving transportation efficiency.

[0080] Green and red glue is used as the fixing and hardening glue component. It can be initially fixed in about 3 minutes in summer and 5-8 minutes in winter. It has excellent heat resistance and its strength does not weaken when placed at 150°C. It has excellent weather resistance and its strength does not decrease after being exposed to ultraviolet rays for 200 hours. It has low viscosity, good transparency, is easy to use and has good airtightness.

[0081] Calculation of water injection volume: Calculate the water injection volume based on the natural moisture content of the soil, the optimal moisture content and loss, the range and depth of humidification. The humidification water injection volume can be calculated as follows:

[0082]

[0083] Where: Q is the estimated injection volume of a single hole (m 3 ) ; k is the corresponding reduction coefficient, which is selected from 0.95 to 1.00 for the corresponding soil type, and 1.0 is selected for this test; w op is the optimum moisture content (%), is the weighted average value of the natural moisture content of the soil layer to be humidified calculated by thickness (%); is the average dry density of the soil before foundation treatment in the intended moistening soil layer (g / cm 3 ); s is the single hole treatment area (m 2 ); h is the simulated humidification depth (m).

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A loess site anti-collapse device, characterized in that: It includes a hole wall rubber sleeve, both ends of which are fixed by a reel, compacted fly ash is provided at the bottom of the hole wall rubber sleeve, hardened rubber capsules and fly ash capsules are provided on the hole wall rubber sleeve located on the reel, the hardened rubber capsules and fly ash capsules are on the same longitudinal plane, and the fly ash capsules are located at the bottom of the hole wall rubber sleeve and above the compacted fly ash; the hole wall rubber sleeve is provided with hydrophobic holes; the hydrophobic holes and the hardened rubber capsules and fly ash capsules are spaced apart in the longitudinal direction; the hole wall rubber sleeve extends into the water injection hole through the opening of the water injection bottom lining plate under the action of an external driving device.

2. The loess site anti-collapse device according to claim 1, characterized in that: The bottom of the hole wall rubber sleeve is a conical structure or a horizontal structure, and the vertical distance from the top opening to the bottom is z, and z is 5-20m. The hole wall rubber sleeve is made of natural latex, and a hydrophobic hole d1 with a diameter of 5-10cm is provided on the hole wall rubber sleeve.

3. The loess site anti-collapse device according to claim 1, characterized in that: The hardening glue capsule includes mixed glue A and mixed glue B, and the mixed glue A and mixed glue B are respectively located in two chambers; the mixed glue A is acrylic epoxy resin or blue-red glue; the mixed glue B includes modified amine.

4. The loess site anti-collapse device according to claim 1, characterized in that: The fly ash capsules are arranged in at least one circle in a circular manner in the horizontal direction of the hole wall rubber sleeve, and the bottom circle is located at the bottom of the hole wall rubber sleeve and above the compacted fly ash.

5. The loess site anti-collapse device according to claim 1, characterized in that: The top of the hole wall rubber sleeve is fixed to the opening of the water injection bottom lining plate through a lining plate connecting buckle. The water injection bottom lining plate is provided with a drain hole with a diameter d2 of 3-5 cm. The four sides of the water injection bottom lining plate are connected to the water cut-off plate.

6. A device for installing a hole wall rubber sleeve, characterized in that: It includes a steel cone, a steel sleeve and a hinge. The steel cone is provided with a steel sleeve. The steel sleeve is provided with at least one hinge groove. A rubber pad is provided in the hinge groove. One end of the hinge is installed in the hinge groove, and the other end is connected to a rolling ball. The rolling ball is made of metal. A connecting shaft is provided above the steel cone, and the connecting shaft is connected to a power device.

7. The installation device according to claim 6, characterized in that The bottom of the steel sleeve is provided with a pointed portion, a first stopper is provided above the hinge groove, a second stopper is provided on the horizontal end surface of the steel sleeve, and the rolling ball is located between the first stopper and the second stopper.

8. The installation device according to claim 6, characterized in that The steel sleeve includes two semicircular components, which are hinged by a connecting hinge; the steel sleeve is wrapped around the outside of the steel cone, and the steel tip of the steel cone is left outside it, and the angle of the tip of the steel sleeve at the junction of the two is 10-45 degrees; the limiter is an L-shaped structure, the length l of its limiting side is r≤l≤l / 2, and the radius of the rolling ball is r.

9. The installation device according to claim 6, characterized in that When in use, the steel cone and the hole wall rubber sleeve are driven into the soil together, and the steel cone is lifted up after it reaches the target position; When the steel cone is lifted up, the rolling rolling ball will crush the capsule containing loose fly ash, so that the loose fly ash adheres to the surface of the steel cone, and then continue to move upward, crushing the capsule containing hardening glue, and fixing and hardening the hole wall rubber sleeve through the hardening glue.

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