CN1006476B

CN1006476B - Constructional method of drilling and impacting rubble-concrete base and apparatus thereof

Info

Publication number: CN1006476B
Application number: CN 87107619
Authority: CN
Inventors: 王正斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-11-04
Filing date: 1987-11-04
Publication date: 1990-01-17
Also published as: CN87107619A

Abstract

The present invention relates to a construction method of drilling and impacting rubble concrete bases and an apparatus thereof. A hole of 3 to 5 meters is drilled by a drilling tool in the position needing to construct a pile base; a sleeve pipe is installed; the bottom of the hole is impacted by a heavy hammer; rubble is impacted; cement mortar is cast to form a big head basis of rubble concrete; a pile post is constructed on the big head basis. The present invention is used for treating the basis with a complicated stratum, and has the advantages of simple and reasonable step, raw material saving, convenient construction, small field occupation, large loading surface of the basis and strong loading capacity; the present invention can also be used for house reinforcement and indoor construction.

Description

Constructional method of drilling and impacting rubble-concrete base and apparatus thereof

The present invention is a kind of job practices that is used for building with method of drilling and impacting placing rubble concrete foundation.

The DE3324509A1 reported in literature construction method on a kind of in-site pouring concrete basis, step is: earlier the outside is established into underground hole-forming with spirochetal pipe, then drop into bulk material to the pipe bottom, impact the bulk material that drops into sash weight along tube interior, it is extruded from the pipe bottom, and the foundation soil body on every side of towards periphery diffusion extruding pipe bottom, inject filler by pipe to the bulk material major part that is squeezed into then, on the bulk material major part, place at last steel reinforcement cage and pour concrete pile.This job practices work efficiency height has improved construction quality when geology condition more complicated.But be placed with the plug that a steel plate is made at sleeve bottom when establishing into the conveyor screw sleeve pipe, rubble and filler install on the plug in sleeve pipe, and the weight impact rubble that moves up and down in sleeve pipe makes it sink together with plug and makes the rubble diffusion.Because weight impacts rubble in sleeve pipe, sleeve pipe need bear very hightension, and tube wall requires thick.Because plug has increased resistance, thereby will use heavy mechanical equipment, such as crane, piling machine.Used weight generally more than 1000kg, has increased construction cost.When hour not constructing in the construction site.Plug can bring error when calculating the pile foundation supporting capacity.For plug is cooperated with sleeve pipe, plug and sleeve pipe lower end will keep certain distance, will select the sleeve pipe of different length along with different construction depths.Plug can make pile foundation hold the increase of power face, has but affected the effective consolidation process to soil layer.Weight moves up and down at inside pipe casing, and frictional force and impulsive force exist simultaneously, have reduced useful work.Also can have a rebound after rubble is hit and the backfill phenomenon, affect impact effect.

The object of the present invention is to provide the method for perfusion concrete pile foundation, this method can be bored a vertical core with drilling tool earlier, again sleeve pipe is packed in this hole, then along sleeve pipe Kong Chongshen is arrived desired depth with weight, give again and drop into quarry rock in the sleeve pipe, use manually-operated hoist engine lifting weight that rubble is poured underground perfusion rubble concrete major part while throw.Overcome prior art and need main equipment construction, cost height, shortcoming that occupied ground is big.Improve the pile foundation bearing capacity.

Work progress of the present invention is to use earlier artificial about one the 0.5 meter dark hole of boring, and utilizes then drilling tool that hole drill is arrived desired depth, puts into sleeve pipe again.Then while mentioning weight with hoist engine for the interior rubble that drops into of pipe, make the hammer rapid decrease, rubble makes it to pour into a mould mortar again and form the concrete major part in the diffusion of the pipe end at the bottom of the impact opening, and the reinforced concrete pile is built on the rubble concrete major part, extracts at last sleeve pipe.The present invention adopts the method for putting into sleeve pipe behind the first pore-forming, and sleeve pipe is general steel pipe, need not spiral on every side, and is simply laborsaving when putting into and extracting, and need not main equipment.The rubble that drops in the sleeve pipe is best with river stone, and label is not less than 200#, the underlying strength height that waters.Because rubble diameter big (generally about 200mm) is saved cement mortar, be not afraid of underground water and enter sleeve pipe, thereby the sleeve pipe lower end need not use plug, working resistance is little, and weight only needs about 500kg, easily carries.Rubble is not influenced by plug, is easy to diffusion, has overcome bounce-back, backfill phenomenon, has strengthened holding the power face, and soil layer is carried out consolidation process effectively.Weight can be deep into following position, sleeve pipe lower end, and rubble is further spread.Frictional force and the impulsive force go deep into sleeve pipe lower end after of weight in sleeve pipe calculated respectively, improved useful work, can and directly calculate the bearing capacity of pile foundation to the impulsive force of rubble according to the pile penetration of weight.If supporting capacity is not enough, can continues to add rubble and impact.Sleeve pipe only play the guiding role to weight, only needs the sleeve pipe about 4m length, does not need sleeve pipe when down constructing again, is deepened soil layer and impact rubble to spread, sink by weight, and casing wall does not require very thick.Present device is simple, invests littlely, is not subjected to the restriction of working face size, also can be used for the reinforcing in house and at indoor construction.Improved construction quality, be convenient to popularize.

Fig. 1 becomes hole pattern with drilling tool;

Fig. 2 is the sleeve pipe of packing into, drops into rubble figure;

Fig. 3 is tension weight churning rubble scatter diagram at the bottom of the hole;

Fig. 4 is the cast figure of rubble concrete major part;

Fig. 5 is the steel bar concrete pile of building on the rubble concrete major part.

Below in conjunction with accompanying drawing the present invention is described in detail:

Measure unwrapping wire in smooth good soil during construction, determine the stake position, use earlier about 0.5 meter dark hole of excavated by manual work, utilize hoist engine 5, steel wire rope 8, support 6 to put into hole 7 drilling tool, as shown in Figure 1.The drilling tool front end is a drill bit 1, and the middle part is the conveyor screw 2 that two helical pitches are arranged, and spiral is the dextrorotation formula, helical angle is 30 °～60 °, and the spiral external diameter is decided as required, is generally 300mm, the rear portion is the blade 3 that 3～6 parallelogram metal sheets are formed, and the blade afterbody has the button that ends that connects with drilling rod 4.Promote drilling rod 4 with artificial or machinery and drive clockwise the drilling tool rotation, the hole is deepened to 3～5 meters, start hoist engine 5, by the drilling tool of slinging of the steel wire rope 8 on the support 6.The sleeve pipe 9 of then packing into, and utilize the hoist engine weight of slinging impacts (the weight diameter is less than casing inner diameter) at sleeve bottom, makes hole depth deepen 2-3 rice, mentions weight and gives and drop into rubble 10 in the sleeve pipe, as shown in Figure 2.(in dark procedure chart, not drawing).Impact rubbles 10 with weight 11 again, mention weight after making its diffusion, drop into again a part of rubble, continue to use tension weight churning, as shown in Figure 3, repeat above process, until rubble no longer spreads.Fig. 3 has only drawn steel wire rope 8, does not draw hoist engine.Weight is a cylindrical metal, and about heavy 500kg, front end has 10: 1 tapering, and afterbody has the draw ring that is connected with wire rope.Mention again weight, give sleeve pipe 9 interior injected water mud 12, shake while pour into a mould, form rubble concrete major part 13, as shown in Figure 4.Then to inserting reinforcing bar in the sleeve pipe and pouring into a mould mortar and on rubble concrete major part 13, erect steel bar concrete pile 14, as shown in Figure 5.With hoist engine sleeve pipe is slowly mentioned at last.Mention in the procedure chart of sleeve pipe and do not draw.

Claims

1, a kind of method of pouring into the concrete pile foundation, its step comprises vertically establishes a sleeve pipe into underground, drop into bulk material to above-mentioned establishing in the underground sleeve pipe, use tension weight churning while throwing, make bulk material in the diffusion of the pipe end, and then filling mortar, form the concrete major part, then the steel bar concrete pile is built on the above-mentioned concrete major part, it is characterized in that with above-mentioned sleeve pipe establish into underground be to adopt to become a vertical core with drilling tool earlier, the mode in this hole of again sleeve pipe being packed into is carried out, and before in sleeve pipe, dropping into bulk material earlier with weight along sleeve pipe with Kong Chongshen to desired depth, the bulk material of above-mentioned input adopts quarry rock.

2, the method for perfusion concrete pile foundation as claimed in claim 1 is characterized in that the lifting of weight relies on the operation hoist engine to realize.