CN1584245A

CN1584245A - Roofbolt constructing method in civil engineering

Info

Publication number: CN1584245A
Application number: CN 200410027454
Authority: CN
Inventors: 陆观宏
Original assignee: Individual
Current assignee: Guangdong Jinhuihua Group Co Ltd
Priority date: 2004-06-03
Filing date: 2004-06-03
Publication date: 2005-02-23
Anticipated expiration: 2024-06-03
Also published as: CN1277025C

Abstract

The present invention discloses an anchor rod construction method used in the civil engineering field. The described anchor rod construction is characterized by that the drill rod and drill bit are fixedly connected together, a movable hook is cover-mounted on the drill rod or drill bit, the movable hook and anchor bar are connected by adopting clasp joint mode. When the drill bit is forwards drilled, the anchar bar also can be driven and also forward advanced, then the solidifying materials of cement slurry, etc. are injected into the hole by means of drill rod, and after the solidifying materials are reached to predefined hole depth, the components, of drill rod and drill bit can be drawn out, the remained anchor bar and solidifying materials can be formed into anchor rod together.

Description

Anchor rod construction method in the civil engineering

Technical field

The present invention relates to the anchor rod construction method in a kind of civil engineering.

Background technology

In the existing common bolt construction technology: earlier with rig boring or luoyang spade pore-forming, clear then hole, following dowel, cement injection mortar or neat slurry form anchor pole.This is the job practices of present most anchor poles, this method maturation, simple.But for the good layer of sand of watery, this job practices is difficult to carry out, and main cause is the pore-forming difficulty, and the layer of sand hole of collapsing easily is to such an extent as to can't descend dowel.In addition, in soft clay area, because the frictional resistance of weak soil is little, anchor pole need design than long just can have certain uplift resistance, the easy shrinkage cavity of weak soil layer, and following dowel is also very difficult.These all need to take the technology of complexity and the construction that operation just can be finished anchor pole, have both increased cost, postpone the duration again.

Summary of the invention

The purpose of the invention is to provide the anchor rod construction method in the civil engineering that a kind of method is simple, working procedure is few, and this method can be with recyclings such as drilling rod, drill bit and drill bit associate members, thereby use cost is very cheap.This method can solve the little problem of anti-pulling of anchor bar in the problem of dowel difficulty and the soft soil layer at present of anchor bolt construction in the layer of sand effectively.

The object of the invention realizes that by following method the anchor rod construction method in this civil engineering may further comprise the steps:

A) drilling rod and drill bit are affixed, are socketed with the activity hook on drill bit or the drilling rod, and this activity hook can freely be rotated relative to drill bit or drilling rod, but can not move freely, i.e. activity hook needs to move forward and backward with drill bit, drilling rod; The activity hook takes hasp type to be connected with dowel, i.e. activity hook is when reach, and dowel is being with toward reach, and when the activity hook moved backward, dowel can separate with the activity hook;

B) stir forward by the drilling rod rotary drilling-head and creep into, drive dowel by the activity hook on drill bit or the drilling rod and follow up forward, by the slurry outlet on the drilling rod or the slurry outlet on drill bit solidfied material such as grout injection in boring.If slurry outlet is located on the drill bit, then this slurry outlet needs to be connected with the middle lumen pore of drilling rod;

C) creep into predetermined hole depth after, above-mentioned boring, drill bit and activity hook are extracted in holing, the activity hook separates with dowel, solidfied material forms anchor pole in dowel and the boring.

The further improvement project of the present invention is: in above-mentioned step a, be hinged with the brill sheet that is used for reaming on the drill bit, this brill sheet is positioned at the front end of activity hook.

Another kind of improvement project of the present invention is: in above-mentioned steps a, with dowel flexural deformation or on dowel the welding, colligation anchoring reinforcement, with the adhesion stress of solidfied material in increasing dowel and holing, in addition, this dowel still can use needs to be designed to different form of structure according to other.

The present invention is preferably among the above-mentioned steps C in implementation process, and extract above-mentioned drilling rod, drill bit and activity hook on the limit in holing, and the limit is to solidfied materials such as drill-pouring cement pastes.

The present invention has the following advantages compared with prior art:

1) after anchor bolt construction is finished, can extract repeated use to drilling rod, drill bit and activity hook, only stay dowel in the hole, therefore, cost is very cheap.

2) working procedure is few, and speed is fast, and pore-forming reaming, following dowel, slip casting can disposablely be finished, and can save the necessary Grouting Pipe of common bolt construction technology.

3) to supporting and protection structure, when anchor pole is constructed in needs perforate on steel sheet pile, agitation pile, concrete stake or diaphragm wall, because it is movable boring sheet, so can open in the soldier pile place than aperture (as Φ 120), pass construction larger-diameter anchor pole (as Φ 200, Φ 500) behind the parts such as drill bit, in addition, still the underground water that can reduce in the layer of sand is gushed out from the aperture, helps pore-forming in the good layer of sand of watery.

4) construction stirring type anchor pole, the stirring type anchor pole of the enlarged footing of can constructing in weak soil and sand enlarges the diameter of anchoring body, improves the uplift resistance of anchor pole, satisfies the needs of soft clay area pattern foundation pit supporting structure.

Description of drawings

Fig. 1 is a stage diagram of the anchor rod construction method embodiment one in the civil engineering of the present invention;

Fig. 2 is the b stage diagram of the anchor rod construction method embodiment one in the civil engineering of the present invention;

Fig. 3 is the c stage diagram of the anchor rod construction method embodiment one in the civil engineering of the present invention;

The schematic diagram of Fig. 4 during for the construction of the anchor rod construction method embodiment two in the civil engineering of the present invention;

Fig. 5 is the schematic diagram after the anchor bolt construction of the anchor rod construction method embodiment two in the civil engineering of the present invention is finished.

The specific embodiment

Embodiment one:

Open earlier Φ 120 holes on the soldier pile 9 of foundation ditch, activity hook 2 is socketed on the rear end of drill bit 1, this activity hook 2 can freely be rotated relative to drill bit 1, but can not move freely, i.e. activity hook 2 need move forward and backward with drill bit 1; Be articulated on the drill bit 1 boring sheet 4, this brill sheet 4 is positioned at the front end of activity hook 2; Each wire 6 of 27 Φ 5 steel hinge lines 5 front ends is broken and reflexed, wire 6 is snapped in the activity hook 2, be that activity hook 2 is when reach, dowel 5 is being with toward reach, when activity hook 2 moves backward, dowel 5 can separate with activity hook 2, and it is fixing that drilling rod 3 is threaded with drill bit 1 usefulness, and the annexation of each parts is seen shown in Figure 1; Close up the brill sheet 4 on the drill bit 1, drill bit 1, brill sheet 4, activity hook 2 and steel hinge line 5 etc. are passed Φ 120 holes of soldier pile 9, rotary drilling-head 1, make brill sheet 4 under centrifugal action, launch cutting and stir soil layer, simultaneously, by the middle lumen pore and the grout injection 8 in boring of the slurry outlet 7 on the drill bit 1 of drilling rod 3, limit grout injection 8 is pushed ahead while stirring, form the cement soil body of diameter of phi 500, as shown in Figure 2; Creep into to desired depth, extract drilling rod 3, drill bit 1, bore sheet 4 and activity hook 2, activity hook 2 automatic and steel hinge line 5 disengagings, bore sheet 4 and close up, when extracting drilling rod 3 and drill bit 1 etc., do not stop grout injection 8 in boring, be pulled out the aperture until drill bit 1, brill sheet 4 and activity hook 2 etc., steel hinge line 5 is kept somewhere in boring, with the cement paste 8 common stirring type anchor poles that form, as shown in Figure 3.

Embodiment two:

In embodiment one, replace steel hinge line 5 with Φ 25 reinforcing bars 10, two reflexed reinforcing bars 11 of front end welding at reinforcing bar 10, reflexed reinforcing bar 11 is snapped in the activity hook 2, the cantilever arm of activity hook 2 is set to foldable, cantilever arm stretches out expansion when promptly creeping into forward, retraction when shifting out backward, the resistance when extracting to reduce drilling rod 1 grade.The connection of remaining part is with embodiment one; Start rig, adopt mud circulation liquid, rotary drilling-head 1 creeps into forward and drives 10 follow-ups of Φ 25 reinforcing bars by activity hook 2, be drilled into desired depth after, clear hole, the continuation of limit grout injection 8 limits is crept into forward then, as shown in Figure 4; After reaching the anchor pole design length, extract drilling rod 3, drill bit 1, bore sheet 4 and activity hook 2, activity hook 2 automatic and reinforcing bar 10 disengagings, bore sheet 4 and close up, when extracting drilling rod 3 and drill bit 1 etc., do not stop grout injection 8 in boring, be pulled out the aperture until drill bit 1, brill sheet 4 and activity hook 2 etc., reinforcing bar 10 is kept somewhere in boring, with the cement paste 8 common anchor poles that form, as shown in Figure 5.

Claims

1. the anchor rod construction method in the civil engineering, it is characterized in that: this method may further comprise the steps:

A) drilling rod and drill bit are affixed, are socketed with the activity hook on drill bit or the drilling rod, and this activity hook takes hasp type to be connected with dowel;

B) stir forward by the drilling rod rotary drilling-head and creep into, drive dowel by the activity hook on drill bit or the drilling rod and follow up forward, by the slurry outlet on the drilling rod or the slurry outlet on drill bit solidfied material such as grout injection in boring;

C) creep into predetermined hole depth after, above-mentioned drilling rod, drill bit and activity hook are extracted in holing, the activity hook separates with dowel, solidfied material forms anchor pole in dowel and the boring.

2. the anchor rod construction method in the civil engineering according to claim 1 is characterized in that: among the described step a, be hinged with the brill sheet that is used for reaming on the described drill bit, this brill sheet is positioned at the front end of activity hook.

3. the anchor rod construction method in the civil engineering according to claim 1 is characterized in that: among the described step a, with dowel flexural deformation or on dowel welding, colligation anchoring reinforcement, to increase the adhesion stress of solidfied material in dowel and the boring.

4. the anchor rod construction method in the civil engineering according to claim 1 is characterized in that: among the described step c, extract above-mentioned drilling rod, drill bit and activity hook on the limit in holing, and the limit is to solidfied materials such as drill-pouring cement pastes.