CN113737789B - Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer - Google Patents
Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer Download PDFInfo
- Publication number
- CN113737789B CN113737789B CN202111291538.9A CN202111291538A CN113737789B CN 113737789 B CN113737789 B CN 113737789B CN 202111291538 A CN202111291538 A CN 202111291538A CN 113737789 B CN113737789 B CN 113737789B
- Authority
- CN
- China
- Prior art keywords
- cylinder
- auxiliary
- push rod
- soft soil
- soil layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0021—Mortar
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The embodiment of the invention discloses a self-drilling type reinforcing system and a self-drilling type reinforcing method for a soft soil layer, which relate to the technical field of soil layer drilling and reinforcing, the self-drilling type reinforcing system comprises a main cylinder arranged in a hole on an inclined plane of a side slope of the soft soil layer, an auxiliary cylinder entering the main cylinder through a push rod and a cement mortar layer filled between the inner wall and the outer wall of the main cylinder and between the inner wall and the outer wall of the auxiliary cylinder, wherein the push rod transmits impact force to the auxiliary cylinder along the axial direction of the main cylinder along with the impact force applied to the push rod, a plurality of hollow support legs of the auxiliary cylinder move towards movable openings corresponding to the auxiliary cylinder and radially expand around the main cylinder until the auxiliary cylinder completely drills into the side slope of the soft soil layer, so that the plurality of hollow support legs and the main cylinder of the auxiliary cylinder can apply anchoring force as a root system structure to the side slope of the soft soil layer, and can strengthen the reinforcing effect to the side slope of the soft soil layer under the condition of reducing the number of unit holes, the probability of geological disasters on the side slope of the soft soil layer is reduced.
Description
Technical Field
The invention relates to the technical field of soil layer drilling and reinforcement, in particular to a self-drilling type reinforcement system and a self-drilling type reinforcement method for a soft soil layer.
Background
The research object of geotechnical engineering is a complex geologic body, and in a long geological age, a large number of geological defects such as faults, bedding, joints, weak interlayers, ditches, dissolving tanks and the like are formed due to the actions of geologic structure movement, natural weathering, human activities and the like. Under certain time and conditions, the rock-soil body may be in a relatively stable equilibrium state; if the conditions change, the original balance state can be damaged, for example, in the excavation and construction process of geotechnical engineering, the original stress field is redistributed, so that the deformation of the rock-soil body is caused, and further, geological disasters such as collapse, rock burst, landslide, ground subsidence and the like are generated.
In order to prevent and treat such disasters, a kind of tension member is often embedded into the rock-soil mass in engineering to mobilize and improve the self-strength and self-stability of the rock-soil mass, and the tension member is called an anchor rod or an anchor cable (hereinafter, referred to as anchor rod) and plays a role of anchoring.
In the prior art, when an anchor rod or an anchor cable is driven into a side slope, a plurality of holes are often formed in the side slope, then the anchor rod or the anchor cable is fed into the holes, and finally cement mortar is poured into the holes. When the anchor rod or the anchor cable and cement mortar are adopted for reinforcement, the anchoring force is provided between the anchoring section and the wall of the hole mainly by the friction force between the cement mortar and the wall of the hole, however, the friction force provided by the mortar is limited due to the problem of the mortar material, so that the problem can be solved only by drilling more and more dense holes in certain projects, and the overall strength of the side slope is reduced.
Disclosure of Invention
The embodiment of the invention provides a self-drilling type reinforcing system and a self-drilling type reinforcing method for a soft soil layer, which can enhance the reinforcing effect on a slope of the soft soil layer and reduce the probability of geological disasters of the slope of the soft soil layer under the condition of reducing the number of unit holes.
In order to solve the above problem, a first aspect of the embodiments of the present invention discloses a self-drilling reinforcing system for soft soil layers, including:
the main cylinder is arranged in a hole on the slope inclined surface of the soft soil layer, at least one group of auxiliary cylinder movable sections are axially arranged on the main cylinder, and each group of auxiliary cylinder movable sections comprise a plurality of movable openings which are uniformly formed in the circumferential direction around the cylinder wall of the main cylinder;
the auxiliary cylinders are equal in number to the movable sections of the auxiliary cylinders, each auxiliary cylinder comprises a plurality of hollow support legs which are simultaneously connected to the same lantern ring, and the auxiliary cylinders are sleeved on the push rod through the lantern rings and enter the main cylinder along with the push rod; when the push rod is not impacted, the auxiliary cylinders correspond to the movable sections of the auxiliary cylinders one by one in the main cylinder, the hollow support legs of each auxiliary cylinder correspond to the movable openings in the movable sections of the auxiliary cylinders corresponding to the auxiliary cylinders one by one, and the free end parts of the hollow support legs extend out of the movable openings; when the push rod is subjected to impact force along the axial direction of the main cylinder, the hollow support legs of the auxiliary cylinder move towards the corresponding movable openings and drill into the side slope of the soft soil layer to form a root system structure which is radially expanded around the main cylinder;
and the cement mortar layer is filled between the inner wall and the outer wall of the main cylinder and between the inner wall and the outer wall of the auxiliary cylinder, wherein the cement mortar layer is formed by pouring cement mortar into the hole, the main cylinder and the auxiliary cylinder after the root system structure is formed and the push rod leaves the hole.
In an embodiment of the invention, the main cylinder further comprises a plurality of groups of cement mortar diffusion sections, the cement mortar diffusion sections and the auxiliary cylinder movable sections are arranged at intervals, wherein the cylinder wall of each cement mortar diffusion section is of a hollow structure, the cylinder wall of each auxiliary cylinder movable section is of a solid structure, one section of the main cylinder positioned at the hole opening is of a solid structure, and one section of the main cylinder positioned at the bottom in the hole is of a hollow structure.
In an embodiment of the invention, the auxiliary cylinder movable sections are 2 groups, and the connecting lines of the movable openings on the 2 groups of auxiliary cylinder movable sections are not parallel to the axial direction of the main cylinder.
In one embodiment of the invention, the lower surface of the free end of each hollow support leg is an arc-shaped surface, and the upper surface is provided with a barb; when the auxiliary cylinder is sleeved on the push rod through the lantern ring and enters the main cylinder along with the push rod, the free end of the hollow support leg is extruded; when the free end of the hollow supporting leg reaches the movable opening corresponding to the hollow supporting leg, the arc-shaped surface part extends out of the movable opening and the barb blocks the wall of the movable opening.
In an embodiment of the invention, the lower end of the sleeve ring is fixed with the upper end of the hollow support leg, the upper end of the sleeve ring is an annular groove, the inner ring of the annular groove is used for being sleeved on the push rod, the bottom in the groove of the annular groove is provided with a plurality of first grouting ports, and the first grouting ports correspond to the hollow support legs one by one and are communicated with the hollow support legs.
In an embodiment of the invention, the pipe wall of the hollow support leg is uniformly provided with a plurality of second grouting openings.
In one embodiment of the invention, the push rod comprises an impact part and a guide part, the impact part is arranged along the transverse direction, the guide part is arranged along the longitudinal direction, and the top end of the guide part is fixed with the bottom end of the impact part to form a T-shaped structure; the auxiliary barrel is sleeved on the guide portion of the push rod through the lantern ring, the bottom end face of the impact portion is provided with a semi-closed groove, the semi-closed groove is used for wrapping the upper end of the auxiliary barrel, the top end face of the impact portion is provided with a thread groove, and the thread groove is used for being fixed with an external device for applying impact force to the push rod.
The second aspect of the embodiment of the invention discloses a self-drilling type reinforcing method for a soft soil layer, the self-drilling type reinforcing method adopts the self-drilling type reinforcing system for the soft soil layer of the first aspect of the embodiment of the invention to reinforce the slope of the soft soil layer, and the method comprises the following steps:
step S1: forming a hole on the inclined surface of the side slope of the soft soil layer;
step S2: completely drilling a main cylinder in the self-drilling type reinforcement system into the hole, so that the main cylinder applies anchoring force along the axial direction of the hole to the side slope of the soft soil layer;
step S3: sleeving an auxiliary cylinder in the self-drilling type reinforcing system on a push rod, and sending the auxiliary cylinder into the main cylinder by using the push rod until the auxiliary cylinder reaches the position above an auxiliary cylinder movable section in the main cylinder corresponding to the auxiliary cylinder;
step S4: adjusting the push rod to make the hollow support legs of the auxiliary cylinder align to the movable openings in the movable section of the auxiliary cylinder one by one and ensure that the free end part of each hollow support leg extends out of the movable opening corresponding to the hollow support leg;
step S5: applying impact force to the push rod to enable the push rod to push the auxiliary cylinder to move until the hollow support legs of the auxiliary cylinder penetrate through the corresponding movable openings and completely drill into the soft soil layer side slope, and forming anchoring force along the radial direction of the hole on the soft soil layer side slope;
step S6: and taking the push rod out of the hole, and simultaneously pouring cement mortar into the hole, the main cylinder and the auxiliary cylinder so as to form a cement mortar layer between the inner wall and the outer wall of the main cylinder and between the inner wall and the outer wall of the auxiliary cylinder.
The embodiment of the invention has the following advantages:
the self-drilling type reinforcing system comprises a main barrel arranged in a hole on an inclined plane of a soft soil layer slope, an auxiliary barrel entering the main barrel through a push rod and a cement mortar layer filled between the inner wall and the outer wall of the main barrel and between the inner wall and the outer wall of the auxiliary barrel, wherein the push rod transmits impact force to the auxiliary barrel along with the axial impact force of the main barrel, a plurality of hollow support legs of the auxiliary barrel move towards movable openings corresponding to the hollow support legs and stretch radially around the main barrel until the hollow support legs are completely drilled into the soft soil layer slope, and therefore the hollow support legs of the auxiliary barrel and the main barrel form a root system structure like tree roots. Based on the same principle that the plant root system has strong ground grabbing force and can fix soil by diffusing towards the periphery, the anchoring force provided by the hollow support legs of the main cylinder and the auxiliary cylinder which form the root system structure in one hole on the slope inclined surface of the soft soil layer is wider in range and stronger in anchoring effect compared with the anchoring force provided by an anchor rod or an anchor cable in the existing hole, so that the reinforcing effect on the slope of the soft soil layer can be enhanced under the condition that the number of the holes per unit is reduced, and the probability of geological disasters of the slope of the soft soil layer is reduced.
In addition, although the self-drilling type reinforcing system is also in an anchor rod or anchor cable and cement mortar structure, part of the cement mortar is poured into the hole through the main cylinder and the auxiliary cylinder, so that the cement mortar can be ensured to be completely immersed into the bottom of the hole, and the problems that the water content in the cement mortar is gradually reduced and the cohesive force provided by the cement mortar is obviously reduced due to the fact that soil of a soft soil layer side slope absorbs water in the process that the cement mortar is poured into the hole from the hole are solved; in addition, the main cylinder and the auxiliary cylinder play a role in reinforcing the soft soil layer side slope in the process of drilling into the soft soil layer side slope, so that compared with the prior art, the risk of stability of the soft soil layer side slope caused by independent drilling can be effectively reduced.
Drawings
FIG. 1 is a schematic structural diagram of a self-drilling reinforcing system for soft soil according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a main barrel according to an embodiment of the present invention;
FIG. 3 is a schematic view of the external structure of the main cartridge according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a secondary cartridge according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a putter in accordance with an embodiment of the present invention;
FIG. 6a is a schematic view of the hollow leg of the secondary cartridge in a first state in accordance with an embodiment of the present invention;
FIG. 6b is a schematic structural view of the hollow leg of the secondary cartridge in a second state in accordance with an embodiment of the present invention;
FIG. 6c is a schematic structural view of the hollow leg of the secondary cartridge in a third state in accordance with an embodiment of the present invention;
FIG. 7 is a top view of the collar of one embodiment of the present invention;
fig. 8 is a flow chart of steps of a self-drilling reinforcement method for soft soil according to an embodiment of the present invention.
Description of reference numerals:
1. 1-1 parts of a main cylinder, 1-2 parts of an auxiliary cylinder movable section, 1-3 parts of a movable opening and a cement mortar diffusion section;
2. the auxiliary barrel comprises 2-1 parts of a sleeve ring, 2-2 parts of a hollow supporting leg, 2-3 parts of an arc-shaped surface, 2-4 parts of a barb, 2-5 parts of an annular groove, 2-6 parts of a first grouting opening;
3. 3-1 parts of a push rod, 3-2 parts of an impact part, 3-3 parts of a guide part, 3-4 parts of a semi-closed groove and a thread groove;
4. a cement mortar layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The mode that stock or anchor rope + cement mortar that provides among the prior art consolidates in single hole, can only provide the anchoring force of a direction usually, and it is effective to the reinforcing effect of side slope, consequently, on some engineering, can only solve the problem through beating more, more intensive hole, and this has reduced the intensity of side slope rock mass on the contrary.
Secondly, for the loose soil layer side slope with large relative density such as sandy soil, silt soil and the like, because the soil quality of the loose soil layer side slope has strong water absorption, the water content in the cement mortar is gradually reduced in the process that the cement mortar is poured into the hole from the hole, the cohesive force provided by the cement mortar is obviously reduced, and even the problem that the cement mortar can not completely dip into the bottom of the hole can occur, so that the anchoring force is reduced, and the side slope reinforcing effect is not ideal.
In view of the above, the present invention provides a self-drilling reinforcement system and a self-drilling reinforcement method for soft soil layers. Referring first to fig. 1, a schematic structural diagram of a self-drilling reinforcing system for soft soil layers according to an embodiment of the present invention is shown, and the self-drilling reinforcing system may include:
the main cylinder 1 is arranged in a hole on the slope inclined surface of the soft soil layer, at least one group of auxiliary cylinder movable sections 1-1 are arranged on the main cylinder 1 along the axial direction, and each group of auxiliary cylinder movable sections 1-1 comprises a plurality of movable openings 1-2 which are uniformly arranged around the circumferential direction of the cylinder wall of the main cylinder 1;
the auxiliary cylinders 2 are equal in number to the auxiliary cylinder movable sections 1-1, each auxiliary cylinder 2 comprises a plurality of hollow support legs 2-2 which are simultaneously connected to the same lantern ring 2-1, and the auxiliary cylinders 2 are sleeved on the push rods 3 through the lantern rings 2-1 and enter the main cylinder 1 along with the push rods 3; when the push rod 3 is not impacted, the auxiliary barrels 2 correspond to the auxiliary barrel movable sections 1-1 one by one in the main barrel 1, a plurality of hollow support legs 2-2 of each auxiliary barrel 2 correspond to a plurality of movable openings 1-2 in the auxiliary barrel movable section 1-1 corresponding to the auxiliary barrel 2 one by one, and the free end part of each hollow support leg 2-2 extends out of the movable opening 1-2; when the push rod 3 is subjected to impact force along the axial direction of the main cylinder 1, the hollow support legs 2-2 of the auxiliary cylinder 2 move towards the corresponding movable openings 1-2 and drill into the side slope of the soft soil layer to form a root system structure which is radially expanded around the main cylinder 1;
and the cement mortar layer 4 is filled between the inner wall and the outer wall of the main cylinder 1 and between the inner wall and the outer wall of the auxiliary cylinder 2, wherein the cement mortar layer 4 is formed by pouring cement mortar into the hole, the main cylinder 1 and the auxiliary cylinder 2 after the root system structure is formed and the push rod 3 leaves the hole.
In the invention, as the push rod 3 is subjected to impact force along the axial direction of the main barrel 1, under the driving of the push rod 3, the plurality of hollow support legs 2-2 of the auxiliary barrel 2 move towards the movable openings 1-2 corresponding to the hollow support legs and radially open around the main barrel 1 until the hollow support legs are completely drilled into the side slope of the soft soil layer, so that the plurality of hollow support legs 2-2 of the auxiliary barrel 2 and the main barrel 1 form a root system structure like a tree root together. Based on the same principle that the plant root system has strong ground grabbing force and can fix soil by diffusing towards the periphery, compared with the anchoring force provided by an anchor rod or an anchor cable in the existing hole, the anchoring force provided by the hollow support legs of the main cylinder and the auxiliary cylinder which form the root system structure in the hole on the slope inclined surface of the soft soil layer is wider in range and stronger in reinforcing effect, so that the reinforcing effect on the slope of the soft soil layer can be enhanced under the condition that the number of the unit holes is reduced, and the probability of geological disasters of the slope of the soft soil layer is reduced.
In addition, although the self-drilling type reinforcing system is also in a structure of an anchor rod or an anchor cable and cement mortar, part of the cement mortar is poured into the hole through the main cylinder 1 and the auxiliary cylinder 2, so that the cement mortar can be completely immersed into the bottom of the hole, and the problems that the water content in the cement mortar is gradually reduced and the cohesive force provided by the cement mortar is remarkably reduced due to the fact that soil of a soft soil layer side slope absorbs water in the process that the cement mortar is poured into the hole from the hole opening at present are solved; in addition, the main cylinder 1 and the auxiliary cylinder 2 play a role in reinforcing the soft soil layer side slope in the process of drilling into the soft soil layer side slope, so that compared with the prior art, the risk of stability of the soft soil layer side slope caused by independent drilling can be effectively reduced.
Referring to fig. 2 and 3, fig. 2 is a schematic cross-sectional structure of a main cylinder 1 according to an embodiment of the present invention, and fig. 3 is a schematic external structure of the main cylinder 1 according to an embodiment of the present invention. As shown in fig. 2 and 3, the main tube 1 is a tubular structure with two ends communicating with each other, and the end surface of the main tube 1 at the bottom in the hole is a pointed end so as to be driven into the slope better and apply an anchoring force to the slope along the axial direction of the hole. After the main cylinder 1 is driven into the side slope, cement mortar needs to be poured into the main cylinder 1 and gaps between the main cylinder 1 and the holes. In order to avoid the problem that the water content in cement mortar is gradually reduced due to the fact that soil of a loose soil layer side slope absorbs water in the process that the cement mortar is poured into a hole from a hole and improve the cement mortar bonding effect between the main cylinder 1 and the hole, referring to fig. 3, the main cylinder 1 further comprises a plurality of groups of cement mortar diffusion sections 1-3, the cement mortar diffusion sections 1-3 and the auxiliary cylinder movable sections 1-1 are arranged at intervals, wherein the cylinder walls of the cement mortar diffusion sections 1-3 are of hollow structures, the cylinder walls of the auxiliary cylinder movable sections 1-1 are of solid structures, one section of the main cylinder 1 located at the hole opening is of a solid structure, and the other section of the main cylinder 1 located at the inner bottom of the hole is of a hollow structure. By the design, the invention can ensure that enough cement mortar enters from the main cylinder 1, the cement mortar entering the main cylinder 1 can enter a gap between the hole and the main cylinder 1 through the hollowed-out cement mortar diffusion sections 1-3, and the cement mortar enters the bottom of the hole through the hollowed-out structure of the main cylinder 1 positioned at the bottom of the hole, so that the problem that the cement mortar is blocked at the hole opening or the middle section of the hole due to water absorption of soil of a soft soil layer side slope can be avoided, the uniformity of the cement mortar filled in the inner part and the outer part of the main cylinder 1 is ensured, and the improvement of the anchoring strength of the whole main cylinder 1 is facilitated.
Preferably, as shown in fig. 2 and 3, the number of the auxiliary barrel movable sections 1-1 arranged along the axial direction of the main barrel 1 is 2, and as the number of the auxiliary barrel 2 and the auxiliary barrel movable sections 1-1 is equal, namely the number of the auxiliary barrel 2 is 2, the hollow support leg 2-2 can be designed to be as long as possible under the condition that the existing slope punching technology is limited. The connecting lines of the movable openings 1-2 on the movable sections 1-1 of the 2 groups of auxiliary cylinders are not parallel to the axial direction of the main cylinder 1, namely, at most one movable opening 1-2 appears on any axis of the cylinder wall of the main cylinder 1, in other words, even under the condition that 2 auxiliary cylinders 2 exist and each auxiliary cylinder 2 comprises a plurality of hollow support legs 2-2, at most one hollow support leg 2-2 appears on any axis of the cylinder wall of the main cylinder 1, the design ensures that the anchoring structure of the invention is more attached to a tree root structure, and the anchoring is carried out by dispersing all around, thereby expanding the range of the anchoring force of a single hole.
Referring to fig. 4, a schematic cross-sectional structure of the auxiliary canister 2 according to an embodiment of the present invention is shown. As shown in FIG. 4, each secondary cylinder 2 comprises a lantern ring 2-1 and a plurality of hollow legs 2-2 connected to the same lantern ring 2-1, specifically, the lower end of the lantern ring 2-1 is fixed to the upper end of the hollow leg 2-2, and the lower end of the lantern ring 2-1 and the upper end of the hollow leg 2-2 can be fixed by welding or integrally formed, so that the stability of the hollow leg 2-2 and the lantern ring 2-1 when the hollow leg 2-2 is pushed by the push rod 3 can be ensured. Because the hollow support legs 2-2 on the auxiliary barrel 2 need to be pushed by the push rod 3 to be brought into the main barrel 1 and the requirement that the plurality of hollow support legs 2-2 of the auxiliary barrel 2 accurately move towards the corresponding movable openings 1-2 and drill into the side slope of the soft soil layer is also met, in one embodiment of the invention, the hollow support legs 2-2 of the auxiliary barrel 2 are improved, as shown in fig. 4, the lower surface of the free end of each hollow support leg 2-2 is an arc-shaped surface 2-3, and the upper surface is provided with a barb 2-4; when the auxiliary cylinder 2 is sleeved on the push rod 3 through the lantern ring 2-1 and enters the main cylinder 1 along with the push rod 3, the free end of the hollow support leg 2-2 is extruded; when the free end of the hollow supporting leg 2-2 reaches the movable opening 1-2 corresponding to the hollow supporting leg 2-2, the arc-shaped surface 2-3 partially extends out of the movable opening 1-2 and the barb 2-4 clamps the wall of the movable opening 1-2.
The structure that the free end of the hollow leg 2-2 is extruded can be specifically as follows: the lantern ring 2-1 is sleeved on the push rod 3, when the push rod 3 is not impacted, the free end of each hollow support leg 2-2 is arranged towards the direction far away from the central axis of the main cylinder 1, so that a structure that the hollow support legs 2-2 are gradually slightly opened along the axial direction of the main cylinder 1 but limited in the main cylinder 1 can be formed. In the invention, because the lower surface of the free end of the hollow supporting leg 2-2 is designed to be the arc surface 2-3 and is matched with the slightly-stretching structure of the free end of the hollow supporting leg 2-2, the free end of the hollow supporting leg 2-2 only partially extends out of the movable opening 1-2, and can accurately move towards the movable opening 1-2 corresponding to the free end of the hollow supporting leg under the action of impact force and drill into a side slope of a soft soil layer to form anchoring force along the radial direction of a hole. When the auxiliary cylinder 2 enters the main cylinder 1 along with the push rod 3 and reaches the movable opening 1-2 corresponding to each hollow supporting leg 2-2, the free end of the hollow supporting leg 2-2 is released and partially extends out of the movable opening 1-2, and the barb 2-4 is arranged on the upper surface of each hollow supporting leg 2-2 and can just block the wall of the movable opening 1-2, so that the hollow supporting leg 2-2 can be prevented from being vibrated and separated from the movable opening 1-2. Referring to fig. 4, the barb 2-4 and the arc surface 2-3 of the lower end surface of the hollow support leg 2-2 also form a triangular impact head, and when the push rod 3 is impacted along the axial direction of the main cylinder 1, the triangular impact head can effectively penetrate and drill into a side slope of a soft soil layer and form anchoring force along the radial direction of a hole on the side slope soil.
Referring to fig. 5, a schematic cross-sectional structure of the push rod 3 according to an embodiment of the present invention is shown. As shown in FIG. 5, the push rod 3 comprises an impact part 3-1 and a guide part 3-2, the impact part 3-1 is arranged along the transverse direction, the guide part 3-2 is arranged along the longitudinal direction, and the top end of the guide part 3-2 is fixed with the bottom end of the impact part 3-1 to form a T-shaped structure; the auxiliary barrel 2 is sleeved on a guide part 3-2 of the push rod 3 through a lantern ring 2-1, a semi-closed groove 3-3 is formed in the bottom end face of the impact part 3-1, the semi-closed groove 3-3 is used for wrapping the upper end of the auxiliary barrel 2, a threaded groove 3-4 is formed in the top end face of the impact part 3-1, and the threaded groove 3-4 is used for being fixed with an external device for applying impact force to the push rod 3. In the invention, the external device can be a push rod device with an impact rod, the tail end of the impact rod is provided with a head thread which can be connected with a thread groove 3-4 on an impact part 3-1 of the push rod 3 through a thread, when the impact rod performs impact work, the push rod 3 also becomes a part of the impact rod and plays a role of the impact rod, thus, the invention only needs to select the size of the impact rod which is suitable for working in the main cylinder 1 without improving the existing push rod device, and the cost of the self-drilling type reinforcing system can be controlled to be lower. When the push rod type auxiliary barrel is used specifically, the guide portion 3-2 of the push rod 3 penetrates through the lantern ring 2-1, the top end of the push rod 3 is fixed with the impact rod through the thread groove 3-4, the semi-closed groove 3-3 in the bottom end face of the impact portion 3-1 just wraps the sleeve of the auxiliary barrel 2, and therefore when the push rod 3 is subjected to impact force along the horizontal direction, the push rod 3 can uniformly transmit the impact force to the auxiliary barrel 2, the problem that the contact portion of the push rod 3 and the sleeve is staggered, and the impact force is applied to the inner wall of the main barrel 1 to cause damage to the main barrel 1 is solved. After the auxiliary barrel 2 forms a root system structure, the semi-closed groove 3-3 of the push rod 3 only wraps the sleeve of the auxiliary barrel 2 and is not connected with the sleeve, so that the push rod 3 can easily leave the hole from the main barrel 1 under the action of the impact rod.
Referring to fig. 6 a-6 c, fig. 6a is a schematic structural view of a hollow leg of an auxiliary cylinder according to an embodiment of the present invention in a first state, fig. 6b is a schematic structural view of a hollow leg of an auxiliary cylinder according to an embodiment of the present invention in a second state, and fig. 6c is a schematic structural view of a hollow leg of an auxiliary cylinder according to an embodiment of the present invention in a third state. Wherein, in the first state, the hollow legs 2-2 of the auxiliary barrel 2 are just aligned with the movable openings 1-2 corresponding to the hollow legs, the free end part of each hollow leg 2-2 just extends out of the movable opening 1-2, and the barbs 2-4 on the hollow legs 2-2 just block the walls of the movable openings 1-2, wherein, in the first state, the push rod 3 is not impacted. Under the second state, the push rod 3 is subjected to single impact force, under the action of the single impact force, the push rod 3 drives the auxiliary cylinder 2 to move towards the deep inside of the main cylinder 1, and each hollow support leg 2-2 penetrates out of the corresponding movable opening 1-2 and partially drills into the slope of the soft soil layer, so that each hollow support leg 2-2 is changed into the second state from the first state. Under the third state, the push rod 3 is impacted for at least two times, under the action of the impact force for at least two times, the push rod 3 drives the auxiliary cylinder 2 to move towards the deeper part inside the main cylinder 1, and each hollow support leg 2-2 is completely drilled into the side slope of the soft soil layer to form a root system structure which is radially opened around the main cylinder 1, so that each hollow support leg 2-2 is changed into the third state from the second state. It should be noted that when the auxiliary cylinder active sections 1-1 are in multiple groups, the auxiliary cylinders 2 need to be guided into the main cylinder 1 one by the push rods 3 and driven into the soft soil slope.
After the auxiliary barrel 2 is driven into the side slope, cement mortar is required to be poured into the auxiliary barrel 2 and gaps between the auxiliary barrel 2 and the side slope soil, so that the adhesion between the hollow support legs 2-2 and the side slope soil is enhanced, and the anchoring force along the radial direction of the hole is improved. As shown in fig. 4 and fig. 6a to 6c, the lantern ring 2-1 and the hollow leg 2-2 are both hollow inside, so that cement mortar can be delivered to the area of the hollow leg 2-2 through the lantern ring 2-1 and the hollow leg 2-2 in sequence. Referring to fig. 7, which shows a top view structure diagram of a lantern ring 2-1 according to an embodiment of the present invention, as shown in the lantern ring 2-1 structure shown in fig. 7, an upper end of the lantern ring 2-1 is an annular groove 2-5, an inner ring of the annular groove 2-5 is used for being sleeved on the push rod 3, a plurality of first grouting ports 2-6 are formed at the bottom of the annular groove 2-5, and the first grouting ports 2-6 correspond to the hollow legs 2-2 one to one and are communicated with the hollow legs 2-2. According to the invention, cement mortar can be effectively gathered through the annular groove 2-5, after the auxiliary barrel 2 forms a root system structure and the push rod 3 leaves the hole, the cement mortar is effectively conveyed to the inside of the hollow support leg 2-2 through the first grouting opening 2-6 and conveyed to the soft soil layer side slope where the free end of the hollow support leg 2-2 is located through the hollow support leg 2-2 to be effectively bonded with the soft soil layer side slope at the position. Preferably, the pipe wall of the hollow support leg 2-2 is also uniformly provided with a plurality of second grouting ports (not shown in the figure), so that cement mortar can enter a gap between the hollow support leg 2-2 and the loose soil layer side slope from the second grouting ports, the uniform bonding effect between the hollow support leg 2-2 and the side slope can be ensured, and the anchoring force brought by the hollow support leg 2-2 is improved. Preferably, the hollow legs 2-2 may be made of hollow steel bars.
Referring to fig. 8, an embodiment of the present invention further discloses a self-drilling reinforcement method for a soft soil layer, where the self-drilling reinforcement method is used for reinforcing a slope of the soft soil layer by using the self-drilling reinforcement system for the soft soil layer of the embodiment of the present invention, and the method may include:
step S1: forming a hole on the inclined surface of the side slope of the soft soil layer;
step S2: completely drilling a main cylinder 1 in the self-drilling type reinforcement system into a hole, so that the main cylinder 1 applies an anchoring force along the axial direction of the hole to the soft soil layer slope;
step S3: sleeving an auxiliary cylinder 2 in the self-drilling type reinforcing system on a push rod 3, and feeding the auxiliary cylinder 2 into a main cylinder 1 by using the push rod 3 until the auxiliary cylinder 2 reaches the position above an auxiliary cylinder movable section 1-1 in the main cylinder 1 corresponding to the auxiliary cylinder;
step S4: adjusting the push rod 3 to make a plurality of hollow support legs 2-2 of the auxiliary cylinder 2 align with a plurality of movable openings 1-2 in the movable section 1-1 of the auxiliary cylinder one by one, and ensure that the free end part of each hollow support leg 1-1 extends out of the movable opening 1-2 corresponding to the hollow support leg;
step S5: applying impact force to the push rod 3 to enable the push rod 3 to push the auxiliary barrel 2 to move until the hollow support legs 2-2 of the auxiliary barrel 2 penetrate through the corresponding movable openings 1-2 and are completely drilled into the side slope of the soft soil layer, and forming anchoring force along the radial direction of the hole on the side slope of the soft soil layer;
step S6: and taking the push rod 3 out of the hole, and simultaneously pouring cement mortar into the hole, the main cylinder 1 and the auxiliary cylinder 2 so as to form a cement mortar layer 4 between the inner wall and the outer wall of the main cylinder 1 and between the inner wall and the outer wall of the auxiliary cylinder 2.
In the present invention, as for the method for forming holes, reference may be made to the existing technology for forming holes in slope control, and reference may be made to the foregoing for the relevant explanation in steps S2-S5, which is not repeated herein. When there are a plurality of sub-pipes 2 to be driven, it is necessary to wait for the formation of the cement mortar layer 4 on the inner and outer walls of the previous sub-pipe 2 and then drive the next sub-pipe in the manner of step S3 to step S6.
In conclusion, the self-drilling type reinforcing method can enhance the anchoring effect on the soft soil layer side slope and reduce the probability of geological disasters of the soft soil layer side slope under the condition of reducing the number of unit holes.
It should be further noted that the various embodiments in this specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the various embodiments may be referred to each other.
It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. "and/or" means that either or both of them can be selected. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
The technical solutions provided by the present invention are described in detail above, and the principle and the implementation manner of the present invention are described in this document by using specific examples, and the description of the above examples is only for assisting understanding of the present invention, and the content of the present description should not be construed as limiting the present invention. While various modifications of the illustrative embodiments and applications herein will be apparent to those skilled in the art, it is not desired to be exhaustive or exhaustive that all such modifications and variations are within the scope of the invention.
Claims (4)
1. The utility model provides a from boring formula reinforcerment system to soft soil layer which characterized in that, it includes to bore formula reinforcerment system certainly:
the main cylinder (1) is arranged in a hole on the slope inclined surface of the soft soil layer, at least one group of auxiliary cylinder movable sections (1-1) are axially arranged on the main cylinder (1), and each group of auxiliary cylinder movable sections (1-1) comprises a plurality of movable openings (1-2) which are uniformly formed in the circumferential direction around the cylinder wall of the main cylinder (1); the main barrel (1) further comprises a plurality of groups of cement mortar diffusion sections (1-3), the cement mortar diffusion sections (1-3) and the auxiliary barrel movable sections (1-1) are arranged at intervals, the barrel walls of the cement mortar diffusion sections (1-3) are of hollow structures, the barrel walls of the auxiliary barrel movable sections (1-1) are of solid structures, one section of the main barrel (1) located at the hole opening is of a solid structure, and one section of the main barrel (1) located at the inner bottom of the hole is of a hollow structure;
the auxiliary cylinders (2) are equal in number to the auxiliary cylinder movable sections (1-1), each auxiliary cylinder (2) comprises a plurality of hollow support legs (2-2) which are connected to the same lantern ring (2-1) at the same time, and the auxiliary cylinders (2) are sleeved on the push rods (3) through the lantern rings (2-1) and enter the main cylinder (1) along with the push rods (3); when the push rod (3) is not subjected to impact force, the hollow support legs (2-2) are gradually slightly opened but limited in the main barrel (1), the auxiliary barrel (2) corresponds to the auxiliary barrel movable section (1-1) in the main barrel (1) in a one-to-one mode, the hollow support legs (2-2) of each auxiliary barrel (2) correspond to the movable openings (1-2) in the auxiliary barrel movable section (1-1) corresponding to the auxiliary barrel (2) in a one-to-one mode, and the free end part of each hollow support leg (2-2) extends out of the movable openings (1-2); when the push rod (3) is subjected to an axial impact force along the main cylinder (1), a plurality of hollow support legs (2-2) of the auxiliary cylinder (2) move towards the corresponding movable openings (1-2) and drill into the slope of the soft soil layer to form a root system structure which is radially expanded around the main cylinder (1); a plurality of second grouting openings are uniformly formed in the pipe wall of the hollow support leg (2-2);
and a cement mortar layer (4) filled between the inner wall and the outer wall of the main cylinder (1) and between the inner wall and the outer wall of the auxiliary cylinder (2), wherein the cement mortar layer (4) is formed by simultaneously pouring cement mortar into the hole, the main cylinder (1) and the auxiliary cylinder (2) after the root system structure is formed and the push rod (3) leaves the hole;
the lower end of the lantern ring (2-1) is fixed with the upper end of the hollow support leg (2-2), the upper end of the lantern ring (2-1) is provided with an annular groove (2-5), the inner ring of the annular groove (2-5) is used for being sleeved on the push rod (3), the bottom in the annular groove (2-5) is provided with a plurality of first grouting ports (2-6), and the first grouting ports (2-6) correspond to the hollow support legs (2-2) one to one and are communicated with the hollow support legs (2-2);
the push rod (3) comprises an impact part (3-1) and a guide part (3-2), the impact part (3-1) is arranged along the transverse direction, the guide part (3-2) is arranged along the longitudinal direction, and the top end of the guide part (3-2) is fixed with the bottom end of the impact part (3-1) to form a T-shaped structure;
the auxiliary barrel (2) is sleeved on a guide part (3-2) of the push rod (3) through the lantern ring (2-1), a semi-closed groove (3-3) is formed in the bottom end face of the impact part (3-1), the semi-closed groove (3-3) is used for wrapping the upper end of the auxiliary barrel (2), a thread groove (3-4) is formed in the top end face of the impact part (3-1), and the thread groove (3-4) is used for being fixed with an external device for applying impact force to the push rod (3);
when a plurality of auxiliary cylinders (2) are arranged, the second auxiliary cylinder (2) is driven into the main cylinder (1) by the push rod (3) after the cement mortar layers on the inner wall and the outer wall of the first auxiliary cylinder (2) are formed.
2. The self-drilling reinforcement system for soft soil layers according to claim 1, characterized in that the secondary cylinder active sections (1-1) are 2 groups, and the connecting lines of the active ports (1-2) on the secondary cylinder active sections (1-1) of the 2 groups are not parallel to the axial direction of the primary cylinder (1).
3. Self-drilling reinforcement system for soft soil layers according to claim 1, characterized in that the lower surface of the free end of each hollow foot (2-2) is an arc-shaped surface (2-3), the upper surface being provided with a barb (2-4);
when the auxiliary cylinder (2) is sleeved on the push rod (3) through the lantern ring (2-1) and enters the main cylinder (1) along with the push rod (3), the free end of the hollow support leg (2-2) is extruded;
when the free end of the hollow supporting leg (2-2) reaches the movable opening (1-2) corresponding to the hollow supporting leg (2-2), the arc-shaped surface (2-3) partially extends out of the movable opening (1-2) and the barb (2-4) clamps the wall of the movable opening (1-2).
4. A self-drilling reinforcement method for soft soil layers, which is characterized in that the self-drilling reinforcement method is used for reinforcing the slope of the soft soil layer by using the self-drilling reinforcement system for the soft soil layers as claimed in any one of claims 1 to 3, and the method comprises the following steps:
step S1: a hole is formed in the inclined surface of the soft soil layer side slope;
step S2: completely drilling a main cylinder (1) in the self-drilling type reinforcement system into the hole, so that the main cylinder (1) applies an anchoring force along the axial direction of the hole to the soft soil layer slope;
step S3: sleeving an auxiliary cylinder (2) in the self-drilling type reinforcing system on a push rod (3), and feeding the auxiliary cylinder (2) into the main cylinder (1) by using the push rod (3) until the auxiliary cylinder (2) reaches the position above an auxiliary cylinder movable section (1-1) in the main cylinder (1) corresponding to the auxiliary cylinder;
step S4: adjusting the push rod (3) to align the hollow support legs (2-2) of the auxiliary barrel (2) with the movable openings (1-2) in the movable section (1-1) of the auxiliary barrel one by one, and ensuring that the free end part of each hollow support leg (1-1) extends out of the movable opening (1-2) corresponding to the hollow support leg;
step S5: applying impact force to the push rod (3) to enable the push rod (3) to push the auxiliary cylinder (2) to move until a plurality of hollow support legs (2-2) of the auxiliary cylinder (2) penetrate through the corresponding movable openings (1-2) and completely drill into the soft soil layer side slope, and forming anchoring force along the radial direction of the hole on the soft soil layer side slope;
step S6: and taking the push rod (3) out of the hole, and simultaneously pouring cement mortar into the hole, the main cylinder (1) and the auxiliary cylinder (2) so as to form a cement mortar layer (4) between the inner wall and the outer wall of the main cylinder (1) and between the inner wall and the outer wall of the auxiliary cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291538.9A CN113737789B (en) | 2021-11-03 | 2021-11-03 | Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291538.9A CN113737789B (en) | 2021-11-03 | 2021-11-03 | Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113737789A CN113737789A (en) | 2021-12-03 |
| CN113737789B true CN113737789B (en) | 2022-02-18 |
Family
ID=78727285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111291538.9A Active CN113737789B (en) | 2021-11-03 | 2021-11-03 | Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113737789B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934520B (en) * | 2022-06-10 | 2024-04-19 | 江苏科技大学 | Combined inclined pile anchor rod foundation pit supporting structure and supporting method |
| CN116537705B (en) * | 2023-07-05 | 2023-09-05 | 中国华西工程设计建设有限公司 | Drilling device for bridge underwater pile foundation construction |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207212382U (en) * | 2017-09-28 | 2018-04-10 | 滨州学院 | A kind of self-vibration jet grouted anchor bar integrated construction equipment |
| CN111139841A (en) * | 2019-12-29 | 2020-05-12 | 中铁二院工程集团有限责任公司 | Construction method for bedding slope steep dip excavation and anchor rod reinforcing structure |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526069A (en) * | 1968-09-09 | 1970-09-01 | Robert F Deike | Anchoring device |
| JPS61221414A (en) * | 1985-03-27 | 1986-10-01 | Mitsuo Inoue | Method and apparatus for fixing driven pile |
| JP3845072B2 (en) * | 2003-04-28 | 2006-11-15 | 雄士 只野 | Expanded friction pile |
| KR100998072B1 (en) * | 2010-04-23 | 2010-12-03 | (주)세종이엔씨 | Expanded ground pressure type anchor structure |
| KR101443034B1 (en) * | 2014-03-12 | 2014-09-22 | 홍석희 | The bulb rimmer units for extension the bearing area of the pile or anchor structures |
| JP6437483B2 (en) * | 2016-04-22 | 2018-12-12 | 株式会社日本コムダック | anchor |
| CN109972614A (en) * | 2019-04-28 | 2019-07-05 | 辽宁工程技术大学 | Sleeve extruding formula expands aerofoil profile anchor pole |
| CN210917345U (en) * | 2019-09-29 | 2020-07-03 | 安徽永昊建设工程有限公司 | Grouting bag type enlarged end anchor rod |
| CN212688982U (en) * | 2020-07-07 | 2021-03-12 | 河北耀腾路桥工程有限公司 | Road side slope supporting construction |
| CN213741136U (en) * | 2020-10-15 | 2021-07-20 | 湖北地建正发建设工程有限公司 | Anchor rope structure is consolidated to side slope |
-
2021
- 2021-11-03 CN CN202111291538.9A patent/CN113737789B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207212382U (en) * | 2017-09-28 | 2018-04-10 | 滨州学院 | A kind of self-vibration jet grouted anchor bar integrated construction equipment |
| CN111139841A (en) * | 2019-12-29 | 2020-05-12 | 中铁二院工程集团有限责任公司 | Construction method for bedding slope steep dip excavation and anchor rod reinforcing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113737789A (en) | 2021-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113737789B (en) | Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer | |
| US5919005A (en) | Ground anchor device for penetrating an underground rock formation | |
| US4832535A (en) | Process for compaction-reinforcement-grouting or for decompaction-drainage and for construction of linear works and plane works in the soils | |
| CN111576403B (en) | Pile splicing structure and bearing platform anchoring structure using PHC tubular pile | |
| EP2576330A2 (en) | Undersea anchoring system and method | |
| CN212742563U (en) | Pin-connected panel foundation ditch fender pile and supporting device | |
| KR101847002B1 (en) | Phc pile reinforced with inner pipe and construction method therefor | |
| CN108842792B (en) | Layered lifting and unloading type ground pulling anchor rod and construction method | |
| CN212506231U (en) | Opposite-pulling anchor cable structure capable of reducing bias load | |
| CN112112159A (en) | Electromagnetic gun pile head hole guiding device of large-diameter overlong static pressure anchor pile | |
| CN206707746U (en) | A kind of steel tendon anchor pole for being used to reinforce weak surrounding rock | |
| CN216405430U (en) | Pressure-bearing expansion body bag type anchor cable for soft soil geology | |
| KR20190123854A (en) | Micropile | |
| RU72986U1 (en) | PILE | |
| CN109898504B (en) | Construction method of prestressed pipe pile in sand layer or pebble layer | |
| CN210238484U (en) | PVC (polyvinyl chloride) pipe pile for improving shock resistance of soft soil foundation | |
| CN109898505B (en) | Composite tubular pile with reinforcing structure in weak stratum | |
| CN113605924A (en) | Combined vertical miniature steel flower pipe pile structure and construction method | |
| CN108397210B (en) | Supporting structure and method for tunnel reconstruction and expansion engineering | |
| JP2000345560A (en) | Building structure of ground anchor its building method | |
| CN219080292U (en) | Reinforcement cage for long cast-in-place piles | |
| CN219218959U (en) | Square fore shaft pipe structure of wall even | |
| CN219690493U (en) | PHC plants stake structure based on hard stratum | |
| CN218204340U (en) | Connecting structure for precast tubular pile | |
| CN217537034U (en) | CFG shaped steel composite foundation pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |