38results about How to "Solve the problem of collapsed holes" patented technology

The invention provides a method for removing a pile foundation intruding in a shield tunnel range and controlling parameters. The construction method comprises the following specific steps that firstly, an inclinometer is embedded into a central lead hole of the pile intruding in the range, plain concrete positioning piles are constructed around the pile intruding in the range, after the positioning piles are constructed to have the height reaching 1/3-1/2 of the height of the pile intruding in the range, backfilling is conducted, and jet grouting piles are constructed on the areas of the upper portions of the positioning piles; secondly, ground installation of a protection sleeve on the top of the pile intruding in the range is conducted, and then the pile intruding in the range can be removed by using a pile jetting method. After a pile body is removed, an impact hole is backfilled with concrete to form a displacement pile, and when shield excavation is conducted to pass through theplain concrete pile, targeted regulation of the specific excavation parameters is conducted; according to the ground surface settlement monitoring situation, WSS is adopted to track grouting, fillingof an underground sunken soil mass is conducted in time, and it is ensured that the ground is stable. The method has the advantages of being good in construction effect and convenient to implement, the pile foundation intruding in the tunnel range is effectively helped to be removed by jetting, and the risk that in the shield construction process, a cutter disc is wound and tightened by steel barsis avoided.

The invention discloses a broken soft thin coal seam gas extraction directional long drill hole construction drilling tool assembly and method. The broken soft thin coal seam gas extraction directional long drill hole construction drilling tool assembly comprises a directional drill bit, a front measuring short section, a non-magnetic wire passing screw drill tool, a rear measuring short section and a central cable passing drill rod which are connected in sequence. The front measuring short section is used for measuring a drill hole inclination angle, a tool face angle and stratum natural gamma radioactive intensity at a near-bit position; the non-magnetic wire-passing screw drilling tool is used for providing rock crushing power for the directional drill bit and transmitting measurement data of the front measurement short section to the rear measurement short section through the non-magnetic wire-passing screw drilling tool side wall communication assembly; the rear measurement short section is used for receiving measurement data of the front measurement short section and measuring a drilling azimuth angle; and the central through cable drill rod is used for uploading hole bottom measurement data. According to the technical scheme, the hole forming depth and the hole forming rate of the broken soft thin coal seam gas extraction drill hole can be effectively improved, the gas treatment period is shortened, and the gas treatment cost is reduced.

Provided is a foundation pit bracing water stopping structure with a support pile and a three-axis stirring pile arranged in a cased drilling manner. The support pile is constructed on the outer side of a foundation pit; the stirring pile is constructed in a support pile area in a three-axis stirring manner; and the support pile directly cuts a pile body on the three-axis stirring pile for construction, and the whole bracing water stopping structure is formed. The three-axis stirring pile is large in power, and can perform stirring in strong-weathered rock and the above stratum. Compared with a conventional small diameter cement stirring pile, the beneficial effects of being small in number of lap joints, good in water stopping effect, high in construction efficiency, high in stratum adaptability and the like are achieved; and compared with a jet grouting pile, the beneficial effects that the water stopping effect is good, and price is low are achieved. According to the foundation pit bracing water stopping structure with the support pile and the three-axis stirring pile arranged in the cased drilling manner, the support pile and the three-axis stirring pile are combined together, construction is performed in the manner that the support pile and the three-axis stirring pile arranged in the cased drilling manner, the stratum condition can be improved, the problem of hole collapse of the support pile is effectively solved, a water stopping effect better than that of the conventional stirring pile and the jet grouting pile can also be achieved, meanwhile the occupied space of a supporting structure is saved, and the water stopping capacity of an existing pile-in-row bracing water stopping structure is enhanced.

The invention discloses a construction method of a sandy ground hole-forming anti-floating anchor of a steel pipe and PVC pipe compound bushing. The method comprises the following steps: (I) positioning and numbering anchor holes; (II) taking a conventional hole drill in position and drilling a steel sleeve; (III) blowing and cleaning holes at a high pressure and lifting a drill; (IV) putting a PVC bushing down and pulling out the steel bushing; (V) grouting; and (VI) putting the anti-floating anchor down. The process method solves the hole collapsing problem by drilling the steel bushing to form holes and blowing and cleaning the holes, so that the anti-floating anchor is smoothly hole-formed. According to the process method, a protective wall is formed by means of the PVC bushing, so that the hole collapsing problem in the grouting construction process is solved, and meanwhile, the anti-floating anchor plays a role of corrosion resistance. The process method is simple to operate andsimple to construct, and can form holes within a relatively short time and construct the anti-floating anchor. The process method can solve the problem of an anchoring force of the anti-floating anchor in a soil layer effectively; and holes are formed by means of a conventional hole drill through the process method, and the steel bushing is repeatedly used, so that the extra cost is prevented frombeing increased.

The invention discloses a waste concrete pipeline penetration drilling pile construction process. According to the construction process, the extended steel casing protection is adopted, a percussion drill and a rotary drilling rig are cooperatively used for processing an underground waste concrete pipeline with larger burial depth, and the drilling pile construction obstacles are removed, so thatthe construction process has the effects that (1) the extended steel casing protection is adopted, so that the problem of hole collapse of a surface miscellaneous filling soil layer and a disturbed soil layer during the construction process can be solved; (2) the percussion drill is used for impacting and processing the waste concrete pipeline with larger burial depth, so that the problem that a narrow field has no excavation condition or the excavation processing safety risk is high due to the complicated surrounding environment is solved; and (3) from the economy point of view, by adopting the extended steel casing protection and cooperatively using the percussion drill and the rotary drilling rig for processing the underground waste concrete pipeline with larger burial depth, compared with an excavation method, the processing period can be saved by 50 percent to 60 percent, and the cost can be saved by 20 percent to 30 percent, so that the economical efficiency is good. According tothe process, the manpower and the labor time are reduced, the forceful guarantee is provided for fitting to the project progress, and the utility tool is simple in structure and easy to implement.

The invention discloses an unstable stratum variable-diameter casing pipe hole-protecting drilling process. The unstable stratum variable-diameter casing pipe hole-protecting drilling process can realize hole-protecting directional drilling in an unstable stratum, and solves the problems of hole collapse, hole shrinkage and the like in unstable stratum drilling, under the hole protection effect ofa variable-diameter casing pipe, the situations of hole collapse, hole shrinkage and the like in an unstable stratum hole section during subsequent drilling are avoided, drill jamming and drill falling accidents are avoided, smoothness of a directional drilling channel is guaranteed due to the hole protection effect of the variable-diameter casing pipe 2 in the unstable stratum hole section, therequirements of a mine for gas control, water damage prevention and the like are met, and the method is good in effect in the construction process, high in stability, high in unstable stratum hole protection drilling efficiency and good in hole forming performance.

The invention relates to a visual detection method for a deep loose bed. The method comprises the following steps: A. drilling is performed on the loose bed by adoption of the general drilling and wall retaining method, namely one section of steel pipe retaining wall is followed when one section is drilled; the steel pipe retaining wall is followed to the bottom of a hole, and then a wall retaining machine is run to the inside of the hole by the up-down means or the down-up means; an outer steel pipe is lifted out on a hole section for pickup; B. the hole section with the wall retaining machine is cleaned; C. after cleaning, pickup is performed on the hole section in which the wall retaining machine is positioned. The method successfully manufactures a high transparent PMMA pipe into the wall retaining machine and uses the general drilling technique to drill the deep loose bed, and then obtains the geological materials of the loose bed, thereby effectively solving the problem of hole collapse of the deep loose bed during the drilling process; moreover, the material compositions and the structural characteristics of the loose bed can be known really and intuitively through the pickup, and the method is a great breakthrough of the drilling technique for the deep loose bed.

The invention provides a groundwater observation well pipe and an observation method for geotechnical investigation and surveying. The groundwater observation well pipe comprises an observation well hole, a telescopic well pipe, and telescopic push rods placed in the telescopic well pipe, wherein the telescopic well pipe comprises an outer layer solid wall pipe body and one or two or more telescopic perforated pipes in mutual sleeving connection; the end of the most outer layer telescopic rod of each telescopic push rod is connected with the most inner layer telescopic perforated pipe; the length of the outer layer solid wall pipe is greater than or equal to the distance between the openings of the observation well hole and the top surface of a water containing layer to be tested; and after the telescopic well pipe is mounted in the observation well hole, a rotary switching sealing ring is arranged outside the outer layer solid wall pipe body in a sleeving manner to realize sealing ofthe outer wall of the well pipe above the water containing layer to be tested and the hole wall of the observation well hole, and after the groundwater water level in the holes is stable, observationof the water level can be performed. Clay balls do not need to be backfilled, observation accuracy can be guaranteed, primary pipe sinking in place can be realized, the problem that the well pipe is mounted to cause subsidence of the hole wall can be solved, and the groundwater level can be observed in a layering manner.

The invention discloses a self-drilling type single-liquid and double-liquid grouting reinforcement device and a using method and belongs to the technical field of coal and rock mass grouting support. The reinforcing device comprises a self-drilling hollow pipe body and a grouting joint, wherein the grouting joint comprises a sleeve, a liquid guide device and a liquid inlet pipe; a front end of the hollow pipe body is connected with a drill bit, so characteristics of the anchor rod are realized, a drill rod can be replaced, the rod does not need to be withdrawn after drilling to the designed depth, a tail end of the pipe body is connected with a grouting connector and then direct grouting is conducted, a problem of hole collapse possibly occurring when the drill rod is withdrawn under the condition that surrounding rock is broken is solved, and repeated through-hole in the hole collapse position is avoided; or the surrounding rock is disturbed after multiple times of re-drilling nearby, so investment of manpower and material resources is reduced, and normal implementation of the original design is ensured; according to site conditions, single-liquid or double-liquid grouting can be selected, and part of injected grout can permeate into surrounding rock cracks, so the anchoring quality is improved. The method can be realized through manual operation of a machine and a full-automatic mode, and accords with the development trend of intelligent automation of mines.

The invention discloses a diameter-expanding fixing cylinder for preventing hole collapse of a pile foundation pit. The diameter-expanding fixing cylinder comprises a cylinder wall I, a cylinder wall II and a forked lowering rod; the cylinder wall I and the cylinder wall II are formed by equally dividing a cylinder, and ratchet and pawl structures are arranged on the corresponding vertical edges of the cylinder wall I and the cylinder wall II; the forked lowering rod comprises a sliding groove and a push rod installed in the sliding groove, the lower end of the push rod is hinged to two supporting legs, and clamping ends are arranged at the ends of the supporting legs. The diameter-expanding fixing cylinder is ingenious in design, after the diameter-expanding fixing cylinder is placed at a proper position, a cover buckle can be jacked out through the push rod, and the push rod can be smoothly retracted after the cover buckle is jacked out; in the pushing-out process of the push rod, the two half cylinder walls can be pushed out, and the cylinder walls can be driven to be separated in one direction after being pushed out; the push rod plays a lifting role in the lowering process of the diameter-expanding fixing cylinder, the cylinder walls on the two sides can be fixed through the design of the ends, the design is ingenious, the adaptability is high, and the diameter-expanding fixing cylinder is worthy of popularization.

The invention discloses a pile foundation hole collapse treatment method. The pile foundation hole collapse treatment method comprises the steps that a rotary drilling rig is adopted to dig to a holecollapse part, silt generated by hole collapse is removed, concrete is adopted for recharging, recharging is carried out to the hole collapse top, after the concrete is solidified, a middle part of the solidified concrete is taken out, and the rest parts form a concrete retaining wall to prevent intensifying of hole collapse. According to the treatment method, the concrete is adopted for recharging to form a hole, the hole collapse problem can be effectively solved according to a project situation, and the construction period requirement is met.

The invention discloses a combined drill. The combined drill comprises a first drill bit and a second drill bit, wherein the first drill bit is cylindrical; the second drill bit connected with the first drill bit is coaxially arranged in the first drill bit; a plurality of drainage grooves used for outputting slag flow from the interiors of the drill bits are formed between the first drill bit andthe second drill bit; the drainage grooves are evenly formed in the outer ring of the second drill bit in the axial direction of the second drill bit; a through hole used for inputting water flow isformed in the middle of the second drill bit; the head of the second drill bit is arranged at the position, close to one end of the head of the first drill bit by a certain distance in the axial direction; the tail of the first drill bit is flush with the tail of the second drill bit; and the second drill bit is connected with a drill rod. Through cooperative work of two different drill bit functional combinations and change of drill bit cutting and de-slagging ways, smoothness and completeness of the inner wall face of a drill hole are guaranteed, the hole forming rate of the drill hole is increased, the length of the drill hole is increased, and the problems of hole collapse and drill jamming in the stratum drilling process are effectively solved.

The invention belongs to the technical field of construction of cast-in-place piles and discloses a construction technology of the cast-in-place piles in the silt stratum with low temperature and highwater content with an aim to solve the problem about poor pile-forming quality in construction of cast-in-place piles in the silt stratum with low temperature and high water content. The technology includes the steps of 1), performing wall retaining of pile hole walls with high-viscosity wall retaining mud during drilling; 2), after wall retaining, grouting concrete in pile holes; 3), after concrete is grouted and formed, performing post-grouting with grouting cement slurry. With the technology, cast-in-place pile forming quality can be improved, and bearing capacity is improved by more than30%.

The invention provides a novel screw grout pile construction tool capable of being repeatedly utilized. The novel screw grout pile construction tool comprises an outer pipe body (6) and an inner pillar body (2), wherein an outer pipe neck ring (5) and a concrete inlet (3) are arranged at the upper end of the outer pipe body (6); a helical blade (8) is arranged at the lower end of the outer pipe body (6); a hook (1) is arranged at the upper end of the inner pillar body (2); a drill (9) is arranged at the lower end of the inner pillar body (2); an outer pipe connecting hole (4) is formed in the upper end of the outer pipe body; an inner pillar connecting hole (10) is formed in the inner pillar body; the two ends of the inner pillar connecting hole are through; the outer pipe body (6), the helical blade (8) and the drill (9) are manufactured through high-carbon steel; and the screw pitch of the helical blade (8) is smaller, and the thread of the helical blade (8) is denser. The novel screw grout pile construction tool has the advantage that the problems that holes collapse, the sediment is thick, piles are broken, the holes cannot be formed due to high underground water level, and excess concrete is utilized, of pile foundations of swivel-driven piles are solved.

The invention discloses a construction method for a cast-in-place pile in a dry sandy gravel stratum. The construction method comprises the following steps that a site is leveled; a long spiral drilling machine is adopted for pre-forming holes, and cement paste is poured in a pressing mode; the method is suitable for the technical field of pile foundation hole forming, effectively combines the advantages of a long spiral and a drilling rig, effectively solves the problem of hole collapse, avoids the influence of mud cake on pile side friction resistance, improves the pile foundation bearing capacity, improves the pile foundation construction quality, reduces the construction cost and improves the construction efficiency. And the construction cost is effectively reduced.

The invention relates to a pile foundation casing embedding and pile pole drilling all-in-one machine. The machine comprises a bearing system, a drilling system, a casing embedding system and a guide tube lifting system; the drilling system comprises an air compressing machine set, a drill rod device, a revolving device and a drill bit; the casing embedding system comprises a casing and a casing connector; the casing comprises an inner wall and an outer wall; the casing connector is connected with the casing through a circumferential screw thread; the casing embedding drill rod is installed between the drill rod and the casing connector; the lower part of the casing embedding drill rod is connected with the casing connector; the casing has a double-wall hollow structure; the casing connector has a double-wall hollow structure; the guide tube lifting system comprises a hoist and a guide tube carrying steel bar concrete; the hoist is connected with the guide tube through wire ropes. The invention provides a pile foundation casing embedding and pile pole drilling all-in-one machine and solves the technical problems that hole collapse may occur during soft ground pile foundation drilling, and embedded casing is too long and cannot be pulled out so that material is wasted.