Grouting backfilling structure for danger elimination of pipeline crossing embankment project

Abstract

The utility model belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a grouting backfilling structure for danger elimination of a pipeline crossing embankment project. The device comprises a first double-row jet grouting pile which is parallel to a directional drilling reamed hole, the symmetric center of the first double-row jet grouting pile and the axis of the directional drilling reamed hole are located on the same vertical plane, the outer edge of the first double-row jet grouting pile exceeds the outer edge of the directional drilling reamed hole, and the first double-row jet grouting pile comprises a plurality of pairs of jet grouting piles which are arranged at equal intervals; each jet grouting pile is perpendicular to the top surface of the dike; and the second double-row jet grouting piles are perpendicular to the directional drilling reaming holes and intersect with the first double-row jet grouting piles. The technical problems that the original compactness of an embankment project cannot be completely recovered through traditional backfilling, grouting and other measures, and the hidden danger of leakage exists are solved.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy and hydropower engineering technology, specifically relating to a grouting backfill structure for hazard mitigation in pipeline crossing dike projects. Background Technology

[0002] To minimize damage to existing dikes during engineering excavation, directional drilling is widely used in water conservancy projects. However, due to various factors such as geological conditions, technical deficiencies, material and equipment problems, and oversights in construction management, directional drilling failures are not uncommon, posing safety hazards to existing dikes.

[0003] To eliminate potential hazards, the current measures mainly include backfilling and grouting. However, since the directional drilling and hole enlargement are generally located underground, traditional backfilling and grouting measures may not be able to fully restore the original density of the dike project, and there will be long-term leakage hazards. Utility Model Content

[0004] This utility model provides a grouting backfill structure for pipeline crossing dike engineering to mitigate risks. It is applied to dikes that have already undergone transverse directional drilling and expansion, and is used to solve the technical problem that traditional backfilling and grouting measures cannot completely restore the original density of the dike project, resulting in potential leakage risks.

[0005] This utility model includes: a first double-row jet grouting pile, which is parallel to the directional drilling and enlargement hole, and the center of symmetry of the first double-row jet grouting pile is on the same vertical plane as the axis of the directional drilling and enlargement hole. The outer edge of the first double-row jet grouting pile extends beyond the outer edge of the directional drilling and enlargement hole. The first double-row jet grouting pile includes several pairs of jet grouting piles arranged at equal intervals. Each jet grouting pile is perpendicular to the top surface of the embankment.

[0006] The second double-row jet grouting pile is perpendicular to the directional drilling and enlargement hole and intersects with the first double-row jet grouting pile.

[0007] This invention utilizes the first double-row jet grouting piles for grouting backfilling and directional drilling to enlarge the borehole, and uses the second double-row jet grouting piles to construct a seepage barrier wall, thereby restoring the original density of the dike.

[0008] Furthermore: when the directional drilling enlargement hole has an enlargement drill rod, multiple first swing jet piles are also provided at the intersection of the first double-row jet grouting piles and the second double-row jet grouting piles. The beneficial effect of this step is that the first swing jet piles are used to fill the gap between the first double-row jet grouting piles and the second double-row jet grouting piles.

[0009] Furthermore: the diameter of the directional drilling and enlargement hole is R1, and the diameters of the first double-row jet grouting pile and the second double-row jet grouting pile are R2. Therefore, the row spacing of the first double-row jet grouting pile is 0.875R2, and the hole spacing is 0.75R2; the row spacing and hole spacing of the second double-row jet grouting pile are both 0.75R2.

[0010] The first grouting pile is a coaxial double-tube first grouting pile with a radius of 0.5R2. The distance between the first grouting pile and the rotary grouting pile is 0.375R2. The beneficial effect of this step is to ensure that the first double-row rotary grouting pile can fill the directional drilling enlargement hole.

[0011] Furthermore: when a steel pipe is left in the directional drilling reaming hole, several equidistant and opposite second swing jet piles are also provided between the first double-row jet grouting piles; the center of the first double-row jet grouting pile and the center of the first swing jet pile are located between the inner wall of the directional drilling reaming hole and the outer wall of the steel pipe. The beneficial effect of this step is that multiple second swing jet piles are used to fill the gap between the directional drilling reaming hole and the steel pipe.

[0012] Furthermore: the diameter of the directional drilling and enlargement hole is R1, and the diameters of the first double-row jet grouting pile and the second double-row jet grouting pile are R2. Therefore, the row spacing of the first double-row jet grouting pile is 0.875R2, and the hole spacing is 0.75R2; the row spacing and hole spacing of the second double-row jet grouting pile are both 0.75R2.

[0013] The second swivel jet grouting pile is a unidirectional swivel jet grouting structure with a radius of R2. The beneficial effect of this step is that the second swivel jet grouting pile can be used to further improve the compaction between the first double-row jet grouting piles.

[0014] The beneficial effects of this utility model are:

[0015] This utility model uses a grouting method combining rotary jetting and swing jetting to effectively address the hole enlargement caused during directional drilling construction, forming an effective and continuous seepage barrier within the embankment's influence area and eliminating potential seepage hazards. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of an embodiment of the grouting backfill structure for hazard mitigation in pipeline crossing embankment projects provided by this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of AA;

[0019] Figure 3 Cross-sectional view of a second embodiment of the grouting backfill structure for hazard mitigation in pipeline crossing embankment projects provided by this utility model;

[0020] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of BB.

[0021] Figure label:

[0022] 1-Dike; 2-Directional drilling and borehole enlargement; 3-First double-row jet grouting pile; 4-Second double-row jet grouting pile; 5-First swing jet grouting pile; 6-Second swing jet grouting pile; 7-Drill rod; 8-Steel pipe; 9-Reinforcing pile. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0025] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0026] Examples of embodiments of this utility model Figures 1-4 As shown, the grouting backfill structure for pipeline crossing dike engineering provided by this utility model can effectively backfill the cavity caused by the directional drilling enlargement 2 due to the failure of the drag pipe construction, restore the density of the dike 1, and prevent leakage.

[0027] This utility model includes: a first double-row jet grouting pile 3, which is parallel to the directional drilling and enlargement hole 2, and the center of symmetry of the first double-row jet grouting pile 3 is on the same vertical plane as the axis of the directional drilling and enlargement hole 2. The outer edge of the jet grouting pile 3 extends beyond the outer edge of the directional drilling and enlargement hole 2. The first double-row jet grouting pile 3 includes several pairs of jet grouting piles arranged at equal intervals. Each jet grouting pile is perpendicular to the top surface of the embankment 1.

[0028] The second double-row jet grouting pile 4 is perpendicular to the directional drilling enlargement hole 2 and intersects with the first double-row jet grouting pile.

[0029] This utility model utilizes the first double-row jet grouting pile 3 to backfill the directional drilling and expand the hole, and uses the second double-row jet grouting pile 4 to construct a seepage barrier wall, thereby restoring the original density of the dike 1.

[0030] The jet grouting range is larger than the directional drilling enlargement range 2 in order to ensure the compactness of the grout.

[0031] In the actual construction process of the drag pipe, the drill rod is in front and the steel pipe is behind. When the drag pipe construction fails, the directional drilling and enlargement section is divided into two parts: one part is the remaining drill rod, and the other part is the remaining steel pipe. Therefore, there are two methods for grouting backfilling for these two situations, as follows:

[0032] like Figure 1 and Figure 2 As shown, when the directional drilling enlargement hole 2 has a drill rod 7 for enlarging the hole, multiple first swing jet piles 5 are also provided at the intersection of the first double-row jet grouting pile 3 and the second double-row jet grouting pile 4, and the first swing jet piles 5 are used to fill the gap between the first double-row jet grouting pile 3 and the second double-row jet grouting pile 4.

[0033] Wherein, the diameter of the directional drilling and enlargement hole 2 is R1, and the diameters of the first double-row jet grouting pile 3 and the second double-row jet grouting pile 4 are R2, then the row spacing of the first double-row jet grouting pile 3 is 0.875R2, and the hole spacing is 0.75R2; the row spacing and hole spacing of the second double-row jet grouting pile 4 are both 0.75R2.

[0034] The first swivel jet grouting pile 5 is a coaxial double-tube first swivel jet grouting pile, the radius of the first swivel jet grouting pile 5 is 0.5R2, and the distance between the first swivel jet grouting pile 5 and the rotary jet grouting pile is 0.375R2.

[0035] In the above description, since only drill rod 7 remains in the directional drilling reamed hole 2, and the diameter of drill rod 7 is relatively small, the internal space of the directional drilling reamed hole 2 is large. Therefore, the cores of the first double-row jet grouting piles 3 are located on both sides of drill rod 7, and the jet grouting diameter of the first double-row jet grouting piles 3 is actually larger than the radius of the directional drilling reamed hole 2. The row spacing and hole spacing of the first double-row jet grouting piles 3 are to improve the compactness of the grouting. The design concept of the second double-row jet grouting piles 4 is the same as that of the first double-row jet grouting piles 3. Then, the swivel grouting opening of the first swing grouting pile 5 is bidirectional, and the swivel grouting angle is small, mainly serving to further fill the gaps at the intersections.

[0036] like Figure 3 and Figure 4As shown, when the steel pipe 8 is left inside the directional drilling reaming hole 2, the pile core cannot pass through the steel pipe 8. Therefore, several equidistant and opposite second swivel grouting piles 6 are also provided between the first double-row jet grouting piles 3. The center of the first double-row jet grouting pile 3 and the center of the first swivel grouting pile 6 are located between the inner wall of the directional drilling reaming hole 2 and the outer wall of the steel pipe 8. Multiple second swivel grouting piles 6 are used to fill the gap between the directional drilling reaming hole 2 and the steel pipe 8.

[0037] The diameter of the directional drilling and enlargement hole 2 is R1, and the diameters of the first double-row jet grouting pile 3 and the second double-row jet grouting pile 4 are R2. Therefore, the row spacing of the first double-row jet grouting pile 3 is 0.875R2, and the hole spacing is 0.75R2; the row spacing and hole spacing of the second double-row jet grouting pile 4 are both 0.75R2.

[0038] The second swivel jet pile 6 is a unidirectional swivel jet structure. The radius of the second swivel jet pile 6 is R2. The swivel jet angle of the second swivel jet pile 6 is greater than that of the first swivel jet pile 6. The second swivel jet pile 6 is used to further improve the compaction between the first double-row jet grouting piles 3.

[0039] Since the steel pipe 8 cannot be penetrated, the second double-row jet grouting pile 4 is separated by the steel pipe 8. Therefore, a reinforcing pile 9 can be set directly above the steel pipe 8. The reinforcing pile 9 does not penetrate the steel pipe 8, and the other data of the reinforcing pile 9 are the same as those of the second double-row jet grouting pile 4.

[0040] In this invention, both jet grouting piles and swing grouting piles are constructed using high-pressure grouting technology. High-pressure grouting pipes are inserted into grouting holes for rotary jet grouting and swing jet grouting, respectively, to form different pile bodies. To ensure compaction, both the first double-row jet grouting piles 3 and the second double-row jet grouting piles 4 are driven in a nested manner to improve overlap and achieve a good filling and seepage prevention effect.

[0041] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. In the description of this specification, references to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A grouting backfill structure for hazard mitigation in pipeline crossing dike projects, applied to dikes that have already undergone transverse directional drilling and enlargement, characterized in that... include: The first double-row jet grouting pile is parallel to the directional drilling and enlargement hole, and the center of symmetry of the first double-row jet grouting pile is on the same vertical plane as the axis of the directional drilling and enlargement hole. The outer edge of the first double-row jet grouting pile extends beyond the outer edge of the directional drilling and enlargement hole. The first double-row jet grouting pile includes several pairs of jet grouting piles arranged at equal intervals. Each jet grouting pile is perpendicular to the top surface of the embankment. The second double-row jet grouting pile is perpendicular to the directional drilling and enlargement hole and intersects with the first double-row jet grouting pile.

2. The grouting backfill structure for pipeline crossing embankment engineering hazard mitigation as described in claim 1, characterized in that, When the directional drilling enlargement hole has an enlargement drill rod, multiple first swing jet piles are also provided at the intersection of the first double-row jet grouting pile and the second double-row jet grouting pile.

3. The grouting backfill structure for hazard mitigation in pipeline crossing embankment projects according to claim 2, characterized in that, The diameter of the directional drilling and enlargement hole is R1, and the diameters of the first double-row jet grouting pile and the second double-row jet grouting pile are R2. Therefore, the row spacing of the first double-row jet grouting pile is 0.875R2, and the hole spacing is 0.75R2; the row spacing and hole spacing of the second double-row jet grouting pile are both 0.75R2. The first swivel jet grouting pile is a coaxial double-tube first swivel jet grouting pile with a radius of 0.5R2 and a distance of 0.375R2 between the first swivel jet grouting pile and the rotary jet grouting pile.

4. The grouting backfill structure for hazard mitigation in pipeline crossing embankment projects according to claim 1, characterized in that, When a steel pipe is left in the directional drilling enlargement hole, several equidistant and opposite second swing jet piles are also provided between the first double-row jet grouting piles; the center of the first double-row jet grouting pile and the center of the first swing jet pile are located between the inner wall of the directional drilling enlargement hole and the outer wall of the steel pipe.

5. The grouting backfill structure for hazard mitigation in pipeline crossing embankment projects according to claim 4, characterized in that, The diameter of the directional drilling and enlargement hole is R1, and the diameters of the first double-row jet grouting pile and the second double-row jet grouting pile are R2. Therefore, the row spacing of the first double-row jet grouting pile is 0.875R2, and the hole spacing is 0.75R2; the row spacing and hole spacing of the second double-row jet grouting pile are both 0.75R2. The second swivel jet pile is a unidirectional swivel jet structure, and the radius of the second swivel jet pile is R2.

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