CN210031790U - Threaded pile drill rod spraying and fixing sludge layer structure - Google Patents
Threaded pile drill rod spraying and fixing sludge layer structure Download PDFInfo
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- CN210031790U CN210031790U CN201920587867.XU CN201920587867U CN210031790U CN 210031790 U CN210031790 U CN 210031790U CN 201920587867 U CN201920587867 U CN 201920587867U CN 210031790 U CN210031790 U CN 210031790U
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Abstract
The utility model discloses a screw pile drilling rod spouts solid silt layer structure, drilling rod pole body surface have the screw thread, and inside axle center link up from top to bottom fills the chamber, and drilling rod top swivelling joint spouts the drilling tool shunt soon, and drilling rod upper portion pole body cup joints power ware, powder ring chamber and air ring chamber with filling the chamber with the axle center are seted up to the upper segment in the drilling rod, establish the passageway that corresponds intercommunication drilling rod and fill chamber, powder ring chamber, air ring chamber in spouting the drilling tool shunt soon, and each passageway outer entry is used for corresponding connection high pressure flow state concrete pump, high-pressure powder pump, high-pressure air pump respectively, the pole body at drilling rod middle part is global establishes round spaced radial nozzle, and the terminal surface of nozzle is concentric central powder orifice and outer loop air jet orifice, powder orifice and powder ring chamber intercommunication, air jet orifice and air ring chamber intercommunication. When the special drill rod is used for forming holes, the silt sandwich layer is reinforced to form the threaded pile with an integral structure.
Description
Technical Field
The utility model relates to a civil engineering becomes stake technical field, more specifically says that it relates to a screw pile drilling rod spouts solid silt layer structure.
Background
The foundation soil belongs to earth surface rock soil and is formed by complex physical chemistry and biological action in the nature, geological survey results generally show the condition of layered distribution, the design of the pile foundation is to insert the pile end into a hard soil layer in the foundation, the resistance of the rock soil to the pile end and the side frictional resistance of the pile body are taken as the bearing capacity of the pile foundation, if the middle part is provided with a sludge soft soil layer with higher water content, not only is concrete at the edge of a drill rod separated and dispersed into sludge during pumping fluid concrete in the construction stage, the density of the concrete pile body is loose at the part, the pumping pressure is difficult to control, the existing mixing pile prevents dispersion by a mud retaining wall or a sinking pipe, but the two measures can not be taken for a screw pile; and the silt soft soil layer with higher water content has little influence on the side frictional resistance of the formed concrete pile, and the bearing contribution to the pile cannot be well provided even if the pile side is in a thread shape. It is therefore necessary to develop a drill rod having a function of spraying a mixed substance into a sludge layer during drilling so that the sludge layer is hardened and solidified to form a thread wall.
Disclosure of Invention
Not enough to prior art exists, the utility model aims to provide a screw pile drilling rod that solves above-mentioned problem spouts solid silt layer structure, consolidates silt sandwich layer in order to form the screw thread wall during the pore-forming, realizes the screw pile in the ground that contains the silt layer.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a spray-solid silt layer structure of a threaded pile drill rod is characterized in that threads are arranged on the surface of a drill rod body, an inner axis vertically penetrates through a filling cavity, the top end of the drill rod is rotatably connected with a rotary spray drilling tool diverter, the rod body on the upper portion of the drill rod is sleeved with a power device, a powder annular cavity and an air annular cavity which are coaxial with the filling cavity are arranged at the upper section in the drill rod, channels correspondingly communicating the filling cavity, the powder annular cavity and the air annular cavity of the drill rod are arranged in the rotary spray drilling tool diverter, outer inlets of the channels are respectively used for correspondingly connecting a high-pressure fluid concrete pump, a high-pressure powder pump and a high-pressure air pump, a circle of radial nozzles are arranged on the peripheral surface of the rod body in the middle of the drill rod, a central powder spray hole and an outer ring.
The utility model discloses further improve technical scheme and be, the powder ring chamber of upper segment and air ring chamber in the drilling rod turn to perpendicular downwardly extending again to central powder through-hole and the outer loop air through-hole of pole body global radial extension one-tenth concentricity form earlier along separate routes on upper portion, with the nozzle intercommunication of below. By the small volume of the through-hole, the jet force is finally stronger at the nozzle.
The utility model discloses further improve technical scheme and be, fill the intracavity and lean on the lateral wall to establish a signal line passageway, wear to adorn the signal cable in the signal line passageway, the signal cable bottom is connected with the pressure sensor of drilling rod bottom, and the top is passed and is spouted the cable passageway that establishes in the drilling tool shunt soon and be connected with the external pressure signal output port. The pressure sensor measures pressure in real time in the drilling process, and proper operation can be conveniently carried out according to actual working conditions.
The utility model discloses the further improvement technical scheme is again, and the nozzle front end leaves apart from the clearance with the perisporium of drilling rod body, and the nozzle front end is sunken in the pole body perisporium. Firstly, the wall surface of the drill rod cuts soil when the drill rod wall rotates downwards, so that the peripheral rock soil of the drill rod can be further prevented from extruding a nozzle and blocking a spray hole; secondly, high-pressure spraying powder and air can quickly penetrate through the gap and the virtual soil to impact the rock and soil outside the wall so as to achieve the designed spraying depth.
The utility model discloses further improve technical scheme again and be, the central powder orifice level setting of nozzle, outer loop air jet from the backward forward center slope. The air jet holes jet air obliquely towards the axis of the central jet hole, and the air jet holes and the powder jet flow jetted from the central hole form mutual interference, so that the jetted powder and water-soil can be uniformly mixed.
The utility model discloses beneficial effect:
the spraying and reinforcing are carried out in a silt soft soil foundation, the surrounding medium is water and soil, although the nozzle of a drill rod has large spraying pressure, the attenuation is still fast, the cutting range is small, in order to expand the reinforcing range of the sprayed powder, air spraying holes are coaxially added around the central powder spraying hole of the nozzle to form an annular gas spraying ring, when the two are sprayed simultaneously, a protective film of air is formed around the central spraying hole, and when the spraying method is used for spraying in a liquid medium, the attenuation of the spraying pressure can be reduced, so that the pressure attenuation rate is as close to the pressure attenuation rate when the spraying is carried out in the air as possible, and the spraying radius is expanded; in addition, the air jet holes jet air obliquely towards the axis of the central jet hole, and the air jet holes and the powder jet flow jetted from the central hole form mutual interference, so that the jetted powder and water-soil can be uniformly mixed.
Meanwhile, a drill bit of the drill rod adopts a pressure sensor, can detect a foundation layered structure during drilling, compares and verifies the foundation layered structure with a silt soft soil value with larger water content, which is measured by static sounding in geological exploration data, and accurately obtains the position of a silt layer.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic view of a vertical cross-section of a nozzle;
fig. 5 is a schematic view of a drilling operation.
Detailed Description
As shown in fig. 1 to 4, in the present application, a screw thread 11 is provided on the surface of a rod body of a drill rod 1, an inner axis runs through a perfusion cavity 12 from top to bottom, the top end of the drill rod 1 is rotatably connected with a jet drilling tool splitter 2, the rod body on the upper portion of the drill rod 1 is sleeved with a power device 3, a powder annular cavity 13 and an air annular cavity 14 which are coaxial with the perfusion cavity 12 are provided at the upper section in the drill rod 1, channels (i.e. a perfusion cavity channel 22, a powder annular cavity channel 23 and an air annular cavity channel 24) which are correspondingly communicated with the perfusion cavity, the powder annular cavity and the air annular cavity of the drill rod are provided in the jet drilling tool splitter 2, external inlets of the channels are respectively used for correspondingly connecting a high-pressure fluid concrete pump, a high-pressure powder pump and a high-pressure air pump (not shown in the figures), the powder annular cavity 13 and the air annular cavity 14, and then turning to the direction to vertically extend downwards to the middle part, the circumference of the rod body in the middle part of the drill rod 1 is provided with a circle of radial nozzles 15 which are uniformly distributed at intervals, the end surfaces of the nozzles 15 are provided with a central powder spray hole 151 and an outer ring air spray hole 152 which are concentric, and the outer ring air through hole 141 of the central powder through hole 131 of the powder annular cavity 13 and the air annular cavity 14 is communicated with the powder spray hole 151 and the air spray hole 152 of the lower nozzle.
A signal wire channel 16 is arranged in the filling cavity 12 close to the side wall, a signal cable penetrates through the signal wire channel 16, the bottom end of the signal cable is connected with the pressure sensor 4 at the bottom of the drill rod, and the top end of the signal cable penetrates through a cable channel 25 arranged in the jet grouting drill diverter and is connected with an external pressure signal output port.
The front end of the nozzle is spaced from the peripheral wall of the drill rod body by a distance gap 17, and the front end of the nozzle is recessed in the peripheral wall of the drill rod body. The central powder injection hole 151 of the nozzle is horizontally arranged, and the outer ring air injection holes 152 are inclined from the rear to the front.
The application of the drill rod in the process of forming the threaded pile in the foundation containing the sludge layer is shown in figure 5:
(1) closing the valve cover 5 at the bottom of the drill rod;
(2) starting a power device, slowly drilling and screwing at the position of the foundation to be formed into the pile, and drilling one screw pitch every time the foundation is rotated for one circle;
(3) the depth from the ground surface to the upper surface of a sludge layer is h1, the depth from the ground surface to the lower bottom surface of the sludge layer is h2, the distance from a nozzle of a drill rod to a drill bit is h, when a hole is drilled to h1+ h-0.5 m, a high-pressure powder pump and a high-pressure air pump are started, so that high-pressure powder and high-pressure air respectively enter a powder annular cavity and an air annular cavity through an upper outer inlet of a flow divider of a jet grouting drill and are sprayed out from the nozzle, the pumped powder is a mixture of reinforcing powder (such as GB175 universal portland cement, special cement and the like) and quick-setting powder (such as alkali-free, low-alkali and alkaline accelerating agent recommended by national academy of sciences) which can be quickly set and early, the mixing amount is 2.5-6% of the mass of the reinforcing powder, and the reinforcing powder is uniformly mixed; the reinforcing powder and the quick-setting powder are cured when meeting water, and the spray pipe has a certain duration without the need of considering the blockage of a spray channel due to condensation; stopping jetting when the hole is drilled to h2+ h +0.5 m; drilling is continued to the designed depth and the drilling is stopped;
(4) after the initial setting of the sludge layer reaches the preset reinforcing strength, the drill is lifted, and simultaneously, a high-pressure fluid concrete pump is started to pump fluid concrete through an upper outer inlet of a jet grouting drill diverter; the drill lifting process should be kept at a constant speed, and the drill rod should be reversely rotated for one circle and simultaneously ascended for one pitch;
(5) and stopping pumping when the pumping pressure concrete reaches the designed elevation and stopping drilling when the drill bit is lifted off the ground surface.
The existing pouring technology pumps liquid concrete from the tip of a drill rod when the drill rod is lifted, the liquid concrete pumped by a sludge layer can be separated and dispersed into sludge, the density of the concrete pile body is loose at the part, and threads are more difficult to form. The utility model discloses consider that the powder spouts into and has certain setting time in the higher silt quality weak soil of water content, spout the powder soon when boring down and to carry brill pump pressure concrete to should spout the position and have had the certain time, cover this time quantum for making the solid better condenses to guarantee that pump pressure flow state concrete pump injection is closely knit under certain pressure, forms the screw thread stake section.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a screw pile drilling rod spouts solid silt layer structure, drilling rod (1) pole body surface has screw thread (11), link up from top to bottom in inside axle center and fill chamber (12), drilling rod (1) top swivelling joint spouts drilling tool shunt (2) soon, and drilling rod (1) upper portion pole body cup joints power ware (3), its characterized in that: powder ring chamber (13) and air ring chamber (14) with filling chamber (12) with the axle center are seted up to upper segment in drilling rod (1), establish in jet-propelled drilling tool shunt (2) and correspond the passageway that feeds through drilling rod filling chamber, powder ring chamber, air ring chamber, and each passageway outer entry is used for corresponding connection high-pressure concrete pump flow state, high-pressure powder pump, high-pressure air pump respectively, round spaced radial nozzle (15) are established to the pole body global at drilling rod (1) middle part, and central powder orifice (151) and outer loop air orifice (152) that nozzle (15) terminal surface is the concentric form, and powder orifice (151) and powder ring chamber (13) intercommunication, air orifice (152) and air ring chamber (14) intercommunication.
2. The screw pile drill rod spraying sludge layer structure as claimed in claim 1, wherein: the powder annular cavity (13) and the air annular cavity (14) at the upper section in the drill rod are branched at the upper part and radially extend to the circumferential surface of the rod body to form a concentric central powder through hole (131) and an outer ring air through hole (141), and then the central powder through hole and the outer ring air through hole are turned to vertically extend downwards and are communicated with a nozzle (15) below.
3. The screw pile drill rod spraying sludge layer structure as claimed in claim 1, wherein: a signal wire channel (16) is arranged in the pouring cavity (12) close to the side wall, a signal cable penetrates through the signal wire channel (16), the bottom end of the signal cable is connected with a pressure sensor (4) at the bottom of the drill rod, and the top end of the signal cable penetrates through a cable channel (25) arranged in the jet grouting drill diverter and is connected with an external pressure signal output port.
4. The screw pile drill rod spraying sludge layer structure as claimed in claim 1, wherein: a distance gap (17) is reserved between the front end of the nozzle and the peripheral wall of the drill rod body, and the front end of the nozzle is recessed in the peripheral wall of the drill rod body.
5. The screw pile drill rod spraying sludge layer structure as claimed in claim 1, wherein: the central powder spray hole (151) of the nozzle is horizontally arranged, and the outer ring air spray holes (152) are inclined from back to front to the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920587867.XU CN210031790U (en) | 2019-04-26 | 2019-04-26 | Threaded pile drill rod spraying and fixing sludge layer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920587867.XU CN210031790U (en) | 2019-04-26 | 2019-04-26 | Threaded pile drill rod spraying and fixing sludge layer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210031790U true CN210031790U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920587867.XU Active CN210031790U (en) | 2019-04-26 | 2019-04-26 | Threaded pile drill rod spraying and fixing sludge layer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210031790U (en) |
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2019
- 2019-04-26 CN CN201920587867.XU patent/CN210031790U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201118 Address after: No.5 Weiyi Road, Xiaokang City, Huaian Economic and Technological Development Zone, Jiangsu Province Patentee after: Jiangsu Huashui Engineering Testing Consulting Co.,Ltd. Address before: 223005 Jiangsu city of Huaian Province Higher Education Park while the road No. 1 Patentee before: HUAIYIN INSTITUTE OF TECHNOLOGY |
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| TR01 | Transfer of patent right |