An expandable tip grouting screw anchor and method of installation thereof

Abstract

The application discloses an end-expandable grouting spiral anchor, which comprises a number of movable rods matched with a number of blades, one end of each movable rod being movably installed on a guide rod, and the other end of each movable rod being movably installed on a blade; a monitoring system comprises a collection module, a setting analysis period based on the spiral anchor during installation, and acquisition of real-time uplift bearing capacity of the spiral anchor; an analysis module, analysis of the real-time uplift bearing capacity of the spiral anchor and the theoretical uplift bearing capacity of the spiral anchor, and acquisition of uplift bearing capacity performance data; a monitoring module, judgment of the anchoring state of the spiral anchor based on the uplift bearing capacity performance data, and acquisition of a spiral anchoring signal; and a compensation module, control of the opening angle of the blade based on the spiral anchoring signal. The application can not only control the opening angle of the blade to improve the bearing capacity of the spiral anchor, but also ensure that the perpendicularity deviation problem does not occur under the control of the opening angle of the blade, thereby greatly improving the stability and bearing quality of the spiral anchor.

Description

Technical Field

[0001] This invention relates to the field of spiral anchor technology, specifically to a grouting spiral anchor with an openable end and its installation method. Background Technology

[0002] Chinese patent CN109969342B discloses a grouting spiral anchor with an openable end, which mainly includes an anchor head, spiral small blades, an anchor body, blades hinged to the anchor body, spiral large blades, and an anchor tail cover plate. The anchor body has a variable cross section, and the blades are hinged to the lower variable cross section of the anchor body. A torsion spring is installed at the hinge. Each blade is provided with a reserved hole. When the blade is tightened, the buckle at the lower end of the guide rod constrains the blade through the reserved hole. When the anchor body spiral penetrates to a specified depth, the blade can be released from the buckle by pre-pulling the guide rod. The blade opens under the action of the torsion spring. After it is fully opened, grouting is performed through the grouting hole.

[0003] In the existing technology, when the guide rod moves upward to the blocking block, the buckle moves upward and releases the constraint on the blade through the reserved hole. After the constraint is released, the blade opens to the maximum opening angle of the torsion spring under the action of the torsion spring. However, the opening angle will be affected by the soil properties and the restoring force of the torsion spring, which will effectively limit the accuracy of the blade opening angle and affect the anchoring stability of the spiral anchor.

[0004] As a result, the blade angle is always at its maximum, affecting the fatigue resistance of the helical anchor structure, such as the spring, and thus the service life of the helical anchor. Summary of the Invention

[0005] The purpose of this invention is to provide a grouting spiral anchor with an openable end and its installation method, solving the following technical problems: the unfolding angle will be affected by soil properties and the restoring force of the torsion spring, which will effectively limit the accuracy of the blade opening angle and affect the anchoring stability of the spiral anchor; and the blade opening angle is always at its maximum, which affects the fatigue resistance of the spiral anchor structure such as the spring, thus reducing the service life of the spiral anchor.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A grouting helical anchor with an openable end, comprising:

[0008] The number of movable rods is adapted to the number of blades. One end of the movable rod is movably mounted on the guide rod, and the other end of the movable rod is movably mounted on the blade.

[0009] It also includes a monitoring system, which includes:

[0010] The data acquisition module, based on the installation process of the helical anchor, sets the analysis cycle to obtain the real-time pull-out bearing capacity of the helical anchor;

[0011] The analysis cycle is divided according to the preset burial depth of the spiral anchor;

[0012] The analysis module analyzes the uplift bearing capacity of the helical anchor based on the real-time uplift bearing capacity and the theoretical uplift bearing capacity, and obtains the uplift bearing capacity performance data.

[0013] Among them, the uplift bearing capacity performance data includes: the total difference in uplift bearing capacity ZCFMs of all analyzed nodes and the total difference in uplift bearing capacity ZCFMl of adjacent analyzed nodes;

[0014] The monitoring module, when the helical anchor reaches the preset burial depth, judges the anchorage status of the helical anchor based on the pull-out bearing capacity performance data and obtains the helical anchorage signal.

[0015] The judgment and analysis process involves: weighting the total difference in uplift bearing capacity ZCFMs of all analyzed nodes and the total difference in uplift bearing capacity ZCFMl of adjacent analyzed nodes to obtain the uplift bearing capacity performance value; and comparing the uplift bearing capacity performance value with the uplift bearing capacity performance threshold.

[0016] The helical anchoring signal includes the helical anchoring stable signal and the helical anchoring unstable signal;

[0017] The compensation module controls the blade angle based on the helical anchoring signal.

[0018] As a further aspect of the present invention: the total difference in uplift bearing capacity ZCFMs of all analyzed nodes is obtained in the following way:

[0019] The difference between the actual pull-out bearing capacity FMi of the helical anchor at each analysis node and the corresponding theoretical pull-out bearing capacity FMYi of the helical anchor is calculated.

[0020] As a further aspect of the present invention, the total difference in pull-out bearing capacity ZCFM is obtained in the following manner:

[0021] The difference in the uplift bearing capacity of the helical anchors of two adjacent analysis nodes is calculated to obtain the uplift bearing capacity difference CFMi; then all the uplift bearing capacity differences CFMi are added together to obtain the result.

[0022] As a further aspect of the present invention: if the difference in the upward bearing capacity is greater than or equal to the threshold value of the difference in the upward bearing capacity, then an unstable spiral anchoring signal is generated.

[0023] As a further aspect of the present invention: if the difference in the upward bearing capacity is less than the threshold value of the difference in the upward bearing capacity, then a spiral anchoring stability signal is generated.

[0024] As a further aspect of the present invention: when the compensation module obtains the unstable signal of the helical anchorage, it obtains the difference in the upward bearing capacity ZBb, substitutes it into the model of blade opening angle and upward bearing capacity, and outputs the blade opening angle value.

[0025] As a further aspect of the present invention, it also includes:

[0026] The prediction module obtains the leaf opening angle value. At the same time, the annular soil area of ​​the i-th analysis node is divided into n different soil collection areas according to the characteristics of the leaf ring setting, where n is equal to the number of leaves set, thereby obtaining the average side friction of the soil in each collection area.

[0027] The average side friction resistance of the soil in two acquisition areas at opposite angles is obtained, and the difference is calculated to obtain the average side friction resistance difference of the soil at opposite angles; the average side friction resistance differences of the soil at all opposite angles are summed to obtain the average side friction resistance difference of the i-th analysis node.

[0028] As a further aspect of the present invention: if the average side friction difference of the i-th analysis node is greater than or equal to the average side friction difference threshold of the i-th analysis node, a blade operation inappropriate signal is generated.

[0029] If the average side friction difference of the i-th analysis node is less than the average side friction difference threshold of the i-th analysis node, a suitable blade operation signal is generated.

[0030] As a further aspect of the present invention, it also includes:

[0031] When the adjustment module receives a signal that the blade is not working properly, it divides the average side friction difference of the i-th analysis node by the average side friction difference threshold of the i-th analysis node to calculate the difference and obtain the depth compensation ratio.

[0032] Multiplying the depth compensation ratio by the difference in uplift bearing capacity ZBb yields the uplift bearing capacity depth compensation value. Using the uplift bearing capacity formula of the auger anchor, the depth to which the auger anchor continues drilling is calculated.

[0033] A method for installing a grouting spiral anchor with an openable end includes the following steps:

[0034] Apply torque to drive the anchor body spiral into the designated depth at the construction site; pull the guide rod, and the moving rod will open the blade at an angle to perform underwater jet grouting in the grouting hole. Using MICP technology, the grout is bonded to the soil at the construction site.

[0035] The beneficial effects of this invention are:

[0036] (1) This invention achieves control over the opening angle of the blade by replacing the buckle with the movable rod, thereby improving the stability of the spiral anchor. It solves the problem in the prior art that when the guide rod moves upward to the blocking block, the buckle moves upward and releases the constraint on the blade through the reserved hole. After the constraint is released, the blade opens to the maximum opening angle of the torsion spring under the action of the torsion spring. However, the opening angle will be affected by the soil properties and the restoring force of the torsion spring, which will effectively limit the accuracy of the blade opening angle and affect the anchoring stability of the spiral anchor.

[0037] (2) The present invention controls the blade opening angle to overcome the problem of unstable anchoring; and solves the problem in the prior art that the blade opening angle is always at the maximum state, which affects the fatigue resistance of the spring and other spiral anchor structures, thus affecting the service life of the spiral anchor.

[0038] (3) The present invention ensures that the blade compensation is performed when the helical anchor reaches the specified depth through the prediction module, so that the verticality of the helical anchor will not be deviated, which will affect the anchoring quality of the helical anchor. It can also avoid the problem that the average side friction resistance of the soil area is large, which will exceed the bearing capacity of the blade and cause the blade to be damaged when the control angle is opened.

[0039] (4) This invention can not only improve the bearing capacity of the helical anchor by controlling the blade opening angle, but also ensure that there will be no verticality deviation under the control of the blade opening angle, which greatly improves the stability and bearing quality of the helical anchor. Attached Figure Description

[0040] The invention will now be further described with reference to the accompanying drawings.

[0041] Figure 1 This is a schematic diagram of the spiral anchor of the present invention;

[0042] Figure 2 This is a schematic diagram of the connection relationship between the movable rod and the blade in this invention;

[0043] Figure 3 This is a system block diagram of the monitoring system in Embodiment 2 of the present invention;

[0044] Figure 4 This is a system block diagram of the monitoring system in Embodiment 3 of the present invention;

[0045] Figure 5 This is a system block diagram of the monitoring system in Embodiment 4 of the present invention.

[0046] In the diagram: 4. Blade; 6. Guide rod; 8. Torsion spring; 11. Movable rod. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1

[0049] Please see Figure 1-2 As shown, the present invention is a grouting spiral anchor with an openable end. The grouting spiral anchor adopts the grouting spiral anchor of Chinese Patent No. CN 109969342 B. The difference is that the movable rod 11 is used instead of the buckle and reserved hole structure.

[0050] Specifically, the grouting spiral anchor includes:

[0051] The number of movable rods 11 is matched with the number of blades 4. One end of the movable rod 11 is movably mounted on the guide rod 6, and the other end of the movable rod 11 is movably mounted on the blade 4.

[0052] The installation method of the grouting spiral anchor of the present invention includes the following steps:

[0053] Apply torque to drive the anchor body spiral into the designated depth at the construction site; pull the guide rod 6, which in turn drives the blade 4 to open at an angle via the movable rod 11, and perform underwater jet grouting in the grouting hole, using MICP technology to bond the grout with the soil at the construction site; installation complete.

[0054] The technical solution of this invention replaces the buckle with the movable rod 11 to control the opening angle of the blade 4, thereby improving the stability of the spiral anchor. This addresses the problem in the prior art where, when the guide rod 6 moves upward to the blocking block, the buckle moves upward, releasing the constraint on the blade 4 through the pre-drilled hole. After the constraint is released, the blade 4 opens to the maximum opening angle of the torsion spring 8 under the action of the torsion spring 8. However, the opening angle is affected by soil properties and the restoring force of the torsion spring 8, effectively limiting the accuracy of the blade 4's opening angle and affecting the anchoring stability of the spiral anchor.

[0055] Example 2

[0056] Please see Figure 3 As shown, based on the above embodiment one, by setting up a monitoring system for the spiral anchor, the opening angle of the blades of the spiral anchor is precisely controlled during the installation process;

[0057] Its angle control will be applicable to soils with different geographical properties, and will avoid the current technology where the blade angle is always at its maximum, affecting the fatigue resistance of the spring and other helical anchor structures, thus reducing the service life of the helical anchor.

[0058] The monitoring system includes:

[0059] The data acquisition module, based on the installation process of the helical anchor, sets the analysis cycle to obtain the real-time pull-out bearing capacity of the helical anchor;

[0060] The analysis cycle is divided according to the preset burial depth of the spiral anchor; specifically, if the preset burial depth of the spiral anchor is Hmy, the preset burial depth of the spiral anchor is divided into i analysis nodes; i = 1, 2, 3...., which are positive integers;

[0061] The burial depth of the helical anchor is the distance between the bottom end of the helical anchor and the surface of the construction site.

[0062] In some embodiments, based on the expected burial depth length of the helical anchor obtained during the installation process and marked as the burial depth length Hm of the helical anchor, the uplift bearing capacity FM of the helical anchor is calculated using the formula FM=0.5*π*Dm*Hm*qt; thus, the theoretical uplift bearing capacity FMYi of the helical anchor is obtained, where Dm is the diameter of the helical anchor, and qt is the average side friction resistance of the soil. qt can be measured using the side friction resistance measuring device for clay strata disclosed in Chinese Patent No. CN113550288B.

[0063] The preset burial depth of the spiral anchor is divided into i analysis nodes. When the spiral anchor actually reaches each analysis node, the soil of the analysis node is spiraled onto the construction site surface through the action of the spiral anchor. The soil is obtained, and the average side friction of the soil at different analysis nodes in real time is obtained based on the soil. Then, the actual pull-out bearing capacity FMi of the spiral anchor at each analysis node is obtained by using the formula of the pull-out bearing capacity of the spiral anchor.

[0064] The analysis module analyzes the uplift bearing capacity of the helical anchor based on the real-time uplift bearing capacity and the theoretical uplift bearing capacity, and obtains the uplift bearing capacity performance data.

[0065] Among them, the uplift bearing capacity performance data includes: the total difference in uplift bearing capacity of all analyzed nodes ZCFMs, and the total difference in uplift bearing capacity of adjacent analyzed nodes ZCFMl;

[0066] In some embodiments, the difference between the actual pull-out bearing capacity FMi of the helical anchor of each analysis node and the corresponding theoretical pull-out bearing capacity FMYi of the helical anchor is calculated to obtain the total difference in pull-out bearing capacity ZCFMs of all analysis nodes.

[0067] The difference in the uplift bearing capacity of the helical anchors of two adjacent analysis nodes is calculated to obtain the uplift bearing capacity difference CFMi; then all the uplift bearing capacity differences CFMi are summed to obtain the total uplift bearing capacity difference ZCFM.

[0068] The monitoring module, when the helical anchor reaches the preset burial depth, judges the anchorage status of the helical anchor based on the pull-out bearing capacity performance data and obtains the helical anchorage signal.

[0069] The judgment and analysis process involves weighting the total difference in uplift bearing capacity ZCFMs of all analyzed nodes and the total difference in uplift bearing capacity ZCFMl of adjacent analyzed nodes to obtain the uplift bearing capacity performance value.

[0070] Compare the uplift bearing capacity performance value with the uplift bearing capacity performance threshold;

[0071] The helical anchoring signal includes the helical anchoring stable signal and the helical anchoring unstable signal;

[0072] In some embodiments, when the helical anchor reaches a preset burial depth, the total difference in uplift bearing capacity ZCFMs of all analysis nodes and the total difference in uplift bearing capacity ZCFMl of adjacent analysis nodes are obtained during the installation of the helical anchor.

[0073] The difference in uplift bearing capacity, ZBb, is calculated using the formula ZBb=a1*ZCFMs+a2*ZCFMl, where a1 and a2 are weighting coefficients, a1+a2=1, a1 takes a value of 0.68, and a2 takes a value of 0.32. The values ​​of a1 and a2 respectively represent the proportions of the influence of the total difference in uplift bearing capacity of all analyzed nodes and the total difference in uplift bearing capacity of adjacent analyzed nodes on the stability of the helical anchor installed on the construction site.

[0074] Compare the difference in uplift bearing capacity performance with the threshold value for uplift bearing capacity performance;

[0075] If the difference in the uplift bearing capacity is greater than or equal to the threshold value of the uplift bearing capacity, an unstable spiral anchorage signal is generated.

[0076] If the difference in the uplift bearing capacity is less than the threshold value, a spiral anchoring stability signal is generated.

[0077] Among them, the unstable spiral anchor signal indicates that when the spiral anchor is installed in the designated position, it does not reach the corresponding stable state and there is a problem of insecure installation; the stable spiral anchor signal indicates that when the spiral anchor is installed in the designated position, it reaches the corresponding stable state and there is no problem of insecure installation. At this time, the spiral anchor grouting work can be completed.

[0078] The technical solution of this invention is as follows: A data acquisition module, based on the installation process of the helical anchor, sets an analysis cycle to obtain the real-time pull-out bearing capacity of the helical anchor; an analysis module, based on the real-time pull-out bearing capacity of the helical anchor, analyzes it with the theoretical pull-out bearing capacity of the helical anchor to obtain pull-out bearing capacity performance difference data; a monitoring module, when the helical anchor reaches a preset burial depth, judges its anchoring status based on the pull-out bearing capacity performance difference data to obtain a helical anchoring signal.

[0079] This invention enables real-time monitoring of the installation process of the helical anchor, accurately determining whether the helical anchor is stably anchored, thus avoiding the problem of unstable installation of the helical anchor due to errors in soil conditions and predictions.

[0080] The monitoring system also includes:

[0081] The compensation module, based on the helical anchoring signal, controls the blade's opening angle to overcome the resulting anchoring instability problem;

[0082] In some embodiments, when the compensation module obtains the spiral anchoring instability signal, it obtains the difference in uplift bearing capacity ZBb, substitutes it into the model of blade angle and uplift bearing capacity, and outputs the blade angle value.

[0083] Among them, the model of blade opening angle and uplift bearing capacity is constructed with the blade opening angle as the X-axis and the uplift bearing capacity as the Y-axis to construct a two-dimensional coordinate system. The experimental data of blade opening angle and uplift bearing capacity are substituted into the two-dimensional coordinate system and the curve of blade opening angle and uplift bearing capacity is plotted. Then, the difference in uplift bearing capacity performance ZBb is obtained, and the blade opening angle value is obtained according to its curve.

[0084] Once the blade angle value is obtained, the guide rod extension length is controlled to achieve control of the blade angle.

[0085] In embodiments of the present invention, a compensation module is used to control the blade angle based on the helical anchoring signal to overcome the resulting anchoring instability problem; thereby solving the problem in the prior art where the blade angle is always at its maximum, affecting the fatigue resistance of helical anchor structures such as springs, and thus the service life of the helical anchor.

[0086] Example 3

[0087] Please see Figure 4 As shown, based on the above embodiment two, the monitoring system further includes:

[0088] The prediction module analyzes the uniformity of the average side friction resistance of the soil at the i-th analysis node based on the blade opening angle value, and determines whether the blade opening angle can be controlled.

[0089] In some embodiments, the prediction module obtains the blade opening angle value, and at the same time, divides the annular soil area of ​​the i-th analysis node into n different soil collection areas according to the characteristics of the blade annular setting, where n is equal to the number of blades set, thereby obtaining the average side friction resistance of the soil in each collection area.

[0090] The average side friction resistance of the soil in two acquisition areas at opposite angles is obtained, and the difference is calculated to obtain the average side friction resistance difference of the soil at opposite angles; the average side friction resistance differences of the soil at all opposite angles are summed to obtain the average side friction resistance difference of the i-th analysis node.

[0091] The average side friction difference of the i-th analysis node is compared with the average side friction difference threshold of the i-th analysis node;

[0092] If the average side friction difference of the i-th analysis node is greater than or equal to the average side friction difference threshold of the i-th analysis node, a blade operation inappropriate signal is generated.

[0093] If the average side friction difference of the i-th analysis node is less than the average side friction difference threshold of the i-th analysis node, a suitable blade working signal is generated.

[0094] Among them, the unsuitable blade operation signal indicates that the soil properties at the bottom of the preset spiral anchor are unevenly distributed. The blade will be controlled to open the angle, which will cause the verticality of the spiral anchor to deviate, thus affecting the installation quality of the spiral anchor.

[0095] The appropriate signal for the blade operation indicates that the soil properties at the bottom of the preset spiral anchor are evenly distributed, and the blade opening angle will be controlled to prevent the verticality of the spiral anchor from shifting.

[0096] The technical solution of this invention is as follows: Through the prediction module, based on the blade opening angle value, the uniformity of the average side friction resistance of the soil at the i-th analysis node is analyzed to determine whether the blade opening angle can be controlled. This ensures that the helical anchor performs blade compensation when it reaches the specified depth, preventing the verticality of the helical anchor from shifting and affecting the anchoring quality of the helical anchor. It also avoids the problem of soil areas with high average side friction resistance exceeding the blade's bearing capacity, which could cause damage to the blade when the controlled angle is opened.

[0097] Example 4

[0098] Please see Figure 5 As shown, based on the above embodiment three, the monitoring system further includes:

[0099] The adjustment module, based on the unsuitable blade operation signal, obtains the average side friction difference value of the i-th analysis node, the average side friction difference threshold value of the i-th analysis node, and the upward bearing capacity performance difference value ZBb, and continues to drill down the helical anchor to obtain the optimal suitable burial depth.

[0100] In some embodiments, when the adjustment module receives a signal that the blade is not working properly, it divides the average side friction difference of the i-th analysis node by the average side friction difference threshold of the i-th analysis node to calculate the difference and obtain the depth compensation ratio.

[0101] Multiply the depth compensation ratio by the difference in uplift bearing capacity ZBb to obtain the uplift bearing capacity depth compensation value. Then, use the uplift bearing capacity depth compensation value to calculate the depth to which the auger anchor can continue drilling using the uplift bearing capacity formula FM=0.5*π*Dm*Hm*qt.

[0102] The technical solution of this invention embodiment: The adjustment module, based on the unsuitable blade operation signal, obtains the average side friction difference value of the i-th analysis node, the average side friction difference threshold value of the i-th analysis node, and the upward bearing capacity performance difference value ZBb, and continues to drill down the auger anchor to obtain the optimal suitable burial length; the adjustment module of this invention can not only meet the requirement of controlling the blade opening angle to improve the bearing capacity of the auger anchor, but also ensure that no verticality deviation occurs under the control of the blade opening angle, greatly improving the stability and bearing quality of the auger anchor.

[0103] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0104] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A grouting spiral anchor with an openable end, characterized in that, include: Movable rod (11), the number of movable rods (11) is matched with the number of blades (4), one end of the movable rod (11) is movably mounted on the guide rod (6), and the other end of the movable rod (11) is movably mounted on the blade (4). It also includes a monitoring system, which includes: The data acquisition module, based on the installation process of the helical anchor, sets the analysis cycle to obtain the real-time pull-out bearing capacity of the helical anchor; The analysis cycle is divided according to the preset burial depth of the spiral anchor; The analysis module analyzes the uplift bearing capacity of the helical anchor based on the real-time uplift bearing capacity and the theoretical uplift bearing capacity, and obtains the uplift bearing capacity performance data. Among them, the uplift bearing capacity performance data includes: the total difference in uplift bearing capacity ZCFMs of all analyzed nodes and the total difference in uplift bearing capacity ZCFMl of adjacent analyzed nodes; The monitoring module, when the helical anchor reaches the preset burial depth, judges the anchorage status of the helical anchor based on the pull-out bearing capacity performance data and obtains the helical anchorage signal. The judgment and analysis process is as follows: the total difference in uplift bearing capacity ZCFMs of all analyzed nodes and the total difference in uplift bearing capacity ZCFMl of adjacent analyzed nodes are weighted and calculated to obtain the uplift bearing capacity performance difference; the uplift bearing capacity performance difference is compared with the uplift bearing capacity performance difference threshold. The helical anchoring signal includes the helical anchoring stable signal and the helical anchoring unstable signal; The compensation module controls the blade's opening angle based on the helical anchoring signal; The total difference in uplift bearing capacity (ZCFMs) of all analyzed nodes was obtained in the following way: The difference between the actual pull-out bearing capacity FMi of the helical anchor at each analysis node and the corresponding theoretical pull-out bearing capacity FMYi of the helical anchor is calculated. The total difference in uplift bearing capacity between adjacent analysis nodes, ZCFMl, is obtained in the following way: The difference in the uplift bearing capacity of the helical anchors of two adjacent analysis nodes is calculated to obtain the uplift bearing capacity difference CFMi; then all the uplift bearing capacity differences CFMi are added together to obtain the result.

2. The grouting spiral anchor with an openable end according to claim 1, characterized in that, If the difference in the upward bearing capacity is greater than or equal to the threshold value of the upward bearing capacity, an unstable spiral anchoring signal is generated.

3. The grouting spiral anchor with an openable end according to claim 1, characterized in that, If the difference in upward bearing capacity is less than the threshold value for upward bearing capacity, a helical anchorage stability signal is generated.

4. A grouting spiral anchor with an openable end according to claim 1, characterized in that, When the compensation module obtains the unstable signal of the helical anchorage, it obtains the difference in the uplift bearing capacity, substitutes it into the model of blade angle and uplift bearing capacity, and outputs the blade angle value.

5. A grouting spiral anchor with an openable end according to claim 1, characterized in that, Also includes: The prediction module obtains the leaf opening angle value. At the same time, the annular soil area of ​​the i-th analysis node is divided into n different soil collection areas according to the characteristics of the leaf ring setting, where n is equal to the number of leaves set, thereby obtaining the average side friction of the soil in each collection area. The average side friction resistance of the soil in two acquisition areas at opposite angles is obtained, and the difference is calculated to obtain the average side friction resistance difference of the soil at opposite angles; the average side friction resistance differences of the soil at all opposite angles are summed to obtain the average side friction resistance difference of the i-th analysis node.

6. A grouting spiral anchor with an openable end according to claim 5, characterized in that, If the average side friction difference of the i-th analysis node is greater than or equal to the average side friction difference threshold of the i-th analysis node, a blade operation inappropriate signal is generated. If the average side friction difference of the i-th analysis node is less than the average side friction difference threshold of the i-th analysis node, a suitable blade operation signal is generated.

7. A grouting spiral anchor with an openable end according to claim 1, characterized in that, Also includes: When the adjustment module receives a signal that the blade is not working properly, it divides the average side friction difference of the i-th analysis node by the average side friction difference threshold of the i-th analysis node to calculate the difference and obtain the depth compensation ratio. Multiply the depth compensation ratio by the difference in uplift bearing capacity to obtain the uplift bearing capacity depth compensation value. Then, use the uplift bearing capacity formula of the auger anchor to calculate the depth to which the auger anchor can continue drilling.

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