CN101806061A - Anchorage unit and construction method using same to ream ground anchor - Google Patents
Anchorage unit and construction method using same to ream ground anchor Download PDFInfo
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- CN101806061A CN101806061A CN 201010127387 CN201010127387A CN101806061A CN 101806061 A CN101806061 A CN 101806061A CN 201010127387 CN201010127387 CN 201010127387 CN 201010127387 A CN201010127387 A CN 201010127387A CN 101806061 A CN101806061 A CN 101806061A
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Abstract
The invention discloses an anchorage unit and a construction method using the same to ream a ground anchor. The construction method comprises the following steps: using a drill, to which a steel strand is bolted, to drill into the depths of the stratum under the condition that the surface soil is not dug out; rotating the drill, extruding the cement slurry and opening stirring blades at the same time; cutting, spalling, crushing and stirring the foundation soil; reaming to form an anchorage body made of cement-soil mixture with the diameter of the anchorage body being approximately 1.2m and the height thereof being approximately 2m; keeping the drill in the anchorage body to constitute the anchorage unit; then, rotating the anchorage unit, extruding the cement slurry and withdrawing a drill holder and a drill stem at the same time, so that a cement-soil protection layer can be formed outside the steel strand as an anchor cable; and forming the ground anchor after the cement-soil is solidified. By using a disposable drill as the frame of the anchorage unit, the invention has the advantage of reasonable structure, convenient construction and low construction cost, makes full use of the characteristics of the materials and greatly increases the pull-out resistance. Therefore, the anchorage unit is suitable for various anchoring angles, and the construction method constitutes a novel anchor method for fixing engineering structures and large equipment and reinforcing side slopes.
Description
Technical field:
The present invention relates generally to the fixedly job practices and the ground tackle thereof of earth anchors such as engineering structures, main equipment or slope reinforcement, a kind of specifically ground tackle and utilize it to carry out the job practices of reaming earth anchor.
Background technology:
At present, adopt the hawser mode fixedly engineering structures, main equipment or slope reinforcement etc. native anchor, stake, buried anchor ingot or large-sized concrete anchor block etc. are arranged, though these anchorage styles have bigger uplift resistance, cost is higher, time-consuming and need execution conditions preferably.
Summary of the invention:
The object of the invention is exactly in order to remedy the defective of prior art, a kind of ground tackle is provided and utilizes it to carry out the job practices of reaming earth anchor, it is to adopt around engineering structures etc. or the design appointed positions is provided with several anchor points, cement paste and reaming of anchor end and stirring are holed, are pressed into to each anchor point, there is the disposable drill bit of steel strand anchor cable to stay in the cement-soil compound anchoring body of foundation soil depths on bolt, the other end of steel strand anchor cable is tightened the anchorage style that is connected with engineering structures etc. together as ground tackle.
The present invention is achieved by the following technical solutions:
A kind of ground tackle is characterized in that: include the drill bit of cylindricality, described drill bit bottom is fixed with cross formula cutter saddle; Have cavity in the described drill bit, the drill bit upper end has the central passage that is communicated with cavity, is fixed with anchor plate in the described central passage, and the anchor plate center has perforation; Be fixed with horizontal bearing pin on the inwall of described drill bit internal cavity, be set with the agitator of yi word pattern on the bearing pin, be fixed with anchor block on the agitator, described agitator vertically is contained in the cavity on the drill bit, and the ring wall both sides with the cavity corresponding position on the described drill bit have the spademan mouth that produces for agitator; Described drill bit top fixed cover is equipped with the drill headstock of cylindricality, and described drill headstock center has interface channel, and the top fixed cover of described drill headstock is equipped with the drilling rod of hollow; The center line of the center line of described central passage, the center line of interface channel and drilling rod is located along the same line; Be provided with the whitewashing mouth that is communicated with the inner chamber of drilling rod in the described drill headstock, the outlet of described whitewashing mouth is positioned on the annular outer wall of drill headstock; Include some steel strand, wherein steel strand penetrate from the drilling rod top, enter in the cavity of drill bit after passing perforation on interface channel, the anchor plate and central passage successively, and its end is fixed on the anchor block on the agitator; All the other steel strand penetrate from the drilling rod top, pass interface channel after its end be fixed on the described anchor plate.
Utilize ground tackle to carry out the job practices of reaming earth anchor, it is characterized in that: carry out according to the following steps successively:
At first, be provided with on the ground of earth anchor or the bank slope at need and settle rig, heap is built the cofferdam of slagging tap in boring zone, and outfit transfusion device, jack, mixer and slush pump, several steel strand are anchored on the anchor plate of drill bit, and after in addition one being done marked steel strand and passes perforation on the anchor plate, be anchored on the anchor block of agitator; Again all steel strand are penetrated the drill headstock that is installed on the rig and the endoporus of drilling rod, from the transfusion device endoporus, pass;
Then, drill bit is inserted drill headstock, tighten steel strand at the transfusion device top with jack and make it catch hold of drill bit, simultaneously, fold remaining steel strand; Spud in after adjusting the drilling rod angle according to designing requirement again, extrusion clay mud pulp-water carries out retaining wall and slags tap while holing; After boring reached projected depth, slush pump stopped to rig transporting clay mud; The mixer slurry that begins to mix cement, slush pump change in the cement stock tank and extract cement paste, and the whitewashing mouth that flows on the drill headstock by feed pipe for mortar, transfusion device and drilling rod extrudes cement paste; Limit rotary drilling mud jacking limit is in front operated jack on the transfusion device at drilling rod top, the steel strand that pulling is connected with anchor block produce outside the cavity agitator that is contained in the yi word pattern in the drill bit cavity;
Then, slowly at the uniform velocity upwards carry and bore 2m, repeatedly cut to and fro downwards again, peel off, broken and stir foundation soil, form the cement-soil compound anchoring body that diameter is about 1.2m, high about 2m; Afterwards, drill bit is parked in the 1/4 height place of carrying brill, holds and press mud jacking decompression again in 5 minutes; After carrying out the length mark of steel strand on the transfusion device of drilling rod top, unclamp all steel strand, upwards carry fast and bore 20cm, allow drill bit and drill headstock break away from, there is bolt the drill bit of steel strand to rest in the cement-soil compound anchoring body;
At last, drilling rod and drill headstock are withdrawed from the mud jacking limit while rotating, and make the outside cement-soil compound topping that forms greater than 5cm of steel strand; The exceptionally straight all steel strand of suitably exerting oneself on the ground are fixed on the centre position of cement-soil compound topping to steel strand, treat just to have finished after the cement-soil compound solidifies the construction of an earth anchor; Use the same method and finish the earth anchor of other roots, get final product.
Described a kind of ground tackle is characterized in that: described anchor plate is the nahlock shape, and its annular outer wall is provided with screw thread, and its anchoring face is provided with the anchor hole of some tapers, and described steel strand are fixed in the described anchor hole.
Described a kind of ground tackle, it is characterized in that: the top of described drill bit is set to attachment plug, described attachment plug cross section is a hexagon, described drill headstock bottom is set to the sleeve with the attachment plug coupling, described attachment plug center has the threaded passage for the spinning anchor plate, the bolt hole that a mooring anchor backing plate is arranged on the attachment plug side respectively has a spring latch lock on six faces of attachment plug, and described spring latch lock is against on the inwall of sleeve.
Described a kind of ground tackle is characterized in that: described whitewashing mouth is convergence circle tapered mouth hole, and the profile of nozzle head is the hexagonal (hexagon)nut shape, and there is screw thread in the outside of mouth body; Described drilling rod bottom fitting is the double pipe joint, and its outer annular distance is interconnected with the whitewashing mouth, and endoporus equates with the aperture of the interface channel of drill headstock and is interconnected.
Described a kind of ground tackle, it is characterized in that: described drill bit middle part is a guide pipe, be fixed with lock wing spring catch and agitator link stopper on the inwall of guide pipe, described lock wing spring catch is fixed in the tube wall when the position that agitator all is lockable when the spademan mouth produces; The tube wall of the position that described agitator link stopper is blocked when being fixed in agitator just all has been received in pipe.
Described a kind of ground tackle, it is characterized in that: the centre of the agitator of described yi word pattern is square agitator seat, there is a pin shaft hole centre of agitator seat, and respectively there is the stirring fin of a α angle both sides, and described anchor block is positioned on the agitator seat with the pin shaft hole ipsilateral.
Described job practices is characterized in that: described some steel strand penetrate anchor hole on the anchor plate by ground, a hole, are attached to the steel strand end with FShi grip sheet, fill in anchor plate anchor hole and tension by the root retraction, and steel strand are anchored on the anchor plate; Again in the threaded passage interior in the attachment plug at the fixing screw-in of anchor plate drill bit top.
Cutter saddle is the cross shape that easily cuts foundation soil, because of cutter saddle is disposable use, so the carbide alloy bloom that needn't burn-on wear-resisting on the blade of cutter saddle.Guide pipe is the equal diameter pipe, be to guarantee the straight degree of boring, get its length should 〉=1.5m bit diameter also ≮ 10 times.The guide pipe tube wall is relative respectively has a spademan mouth up and down, and the bearing pin of agitator is positioned at the tube wall in the middle of the spademan mouth, and agitator produces from the spademan mouth can be to the position vertical with guide pipe.The lock wing spring catch of installing on the guide pipe tube wall when agitator is not opened the position that also is parked in the guide pipe, props up and brakes agitator with the elastic force of locking wing spring catch; The spademan steel strand that are pulled when agitator are opened when vertical with guide pipe entirely, and lock wing spring catch ejects lock wing pin, pin agitator and do not allow and return, avoid agitator to be recovered in the guide pipe when stirring concrete earth up and down.In when boring, enter for fear of foundation soil and to block agitator in the guide pipe, and allow agitator keep the easiest state of being opened by the spademan steel strand, in guide pipe, be provided with link stopper and locate to agitator.The centre of agitator is square agitator seat, and there is a pin shaft hole centre of agitator seat, and it is the stirring fin of α=3～10 ° that respectively there is an angle both sides, and on the agitator seat of pin shaft hole ipsilateral an anchor block is arranged.Stir the α angle of fin and select according to different ground soil materials, the weak soil of I, II class is got big value, and the pan soil or the gravel soil of III, IV class get the small value.Attachment plug is hexagon, and there is the threaded passage that the steel strand anchor plate is installed the centre at top, and the keyhole of a mooring anchor backing plate is arranged on the attachment plug side.On six faces of attachment plug a spring latch lock is arranged respectively, when the branch sleeve of attachment plug insertion drill headstock, these spring latch locks are against bumping in the pearl groove of sleeve, can guarantee when the spreading drilling rod, unclamp and do not fall drill bit on the transfusion device behind the steel strand.
The steel strand anchor cable is connected with drill bit: in advance the steel strand anchor plate being processed as the outside has retaining thread, and the nahlock shape that several taper anchor holes are arranged on the anchoring face.Some steel strand anchor cables, respectively by the steel strand in a hole penetrate each anchor hole of anchor plate.FShi grip sheet is attached to the steel strand end, and retraction is filled in the taper anchor hole of anchor plate, by root tension steel strand, some steel strand is anchored on the anchor plate.Again anchor plate is screwed in the threaded passage of drill bit attachment plug, on the attachment plug side, tighten the set bolt of anchor plate, finish being connected of steel strand anchor cable and drill bit.
The material of drill bit, drill headstock and steel strand anchor cable: the material of cutter saddle, agitator, attachment plug, anchor plate, agitator bearing pin, anchor block, agitator block and drill headstock is a steel, the material of whitewashing mouth is a hard alloy steel, and the material of guide pipe is a seamless steel pipe.The material of steel strand anchor cable is a stranded galvanized steel.
The mud jacking material of drill bit when boring or stirring: the mud jacking material during boring is a clay mortar, and the mud jacking material that stirs or remove when boring is a cement paste of mixing Admixture.
The mud jacking pressure of drill bit when boring or stirring: during boring, the pressure that is pressed into clay mortar is controlled at 0.5～1.0Mpa; Stirring concrete earth compound anchor body and removing when doing topping bore for the steel strand anchor cable, the pressure that is pressed into cement paste is controlled at 1.0～3.0Mpa.The corollary equipment of drill bit formula reaming earth anchor construction: engineering exploration rig, drill bit, double pipe drilling rod, special-purpose transfusion device, feed pipe for mortar, slush pump, slurry mixer, cementing tank, air compressor, diesel-driven generator etc.
Principle of the present invention:
1, the force analysis of drill bit formula reaming earth anchor: know according to the mechanical characteristic that the French Habib theory of " classical soil mechanics " draws soil bolt: the uplift resistance F of soil bolt is made up of total collateral resistance T of steel strand anchor cable topping circumferential surface and total end resistance Q of cement-soil compound anchoring body compression face.When pulling capacity P hour, all pulling capacity P are born by total collateral resistance T of steel strand anchor cable topping circumferential surface; When pulling capacity P increase reached certain value, pulling capacity P was born jointly by total collateral resistance T of steel strand anchor cable topping circumferential surface and total end resistance Q of cement-soil anchoring body compression face; When pulling capacity P increased again, all pulling capacity P was born by total end resistance Q of cement-soil anchoring body compression face.
The difference of drill bit formula reaming earth anchor and conventional native anchor structure form is bigger anchoring body diameter.Steel strand anchor cable (containing topping) diameter is about Φ
1=10～20cm, boring reaches deeply that the cement-soil compound anchoring body diameter of reaming is about Φ behind 5～30m
2=1200cm, the diameter of phi of cement-soil compound anchoring body
2Than anchor cable diameter of phi
1Big 60～120 times.According to above-mentioned force analysis to soil bolt, when drill bit formula reaming earth anchor bore bigger pulling capacity P, this pulling capacity P should be all born by total end resistance Q of cement-soil compound anchoring body compression face, promptly should the time total end resistance Q be uplift resistance F.Uplift resistance F is by the deadweight G of drill bit formula reaming earth anchor
1, stir the truncated cone foundation soil weight G in the face more than the cement-soil compound anchoring body compression face
2The shear stress T that stirs on the S of face border with the truncated cone foundation soil forms.The concrete stressed sketch of " " drill bit formula reaming earth anchor, as shown in figure 15.
Stressed force system in equilibrium equation by drill bit formula reaming earth anchor is: ∑ Y=0 P-F=0
Then: P=F==G
1+ G
2+ TS (KN)
In the formula: P---pulling capacity (KN);
F---uplift resistance (being total end resistance Q of cement-soil compound anchoring body compression face) (KN);
G1---drill bit formula reaming earth anchor deadweight is by the reassembling into certainly of steel strand anchor cable and cement-soil topping, drill bit and cement-soil compound anchoring body (KN);
G
2---cement-soil compound anchoring body compression face is to the weight of the truncated cone foundation soil of ground surface, G
2=γ V (KN);
γ---foundation soil unit weight (KN/m
3);
V---truncated cone foundation soil volume, V=(R
1 2+ R
2 2+ R
1R
2) H π/3 (m
3);
R
1---the radius of cement-soil compound anchoring body compression face, R
1≈ 0.6m (m);
R
2---the radius on truncated cone foundation soil surface, R
2=R
1+ Htg β (m);
β---stir the angle of face, relevant with the sassafras angle θ that rubs of foundation soil with cohesion c;
The degree of depth of H---boring, promptly the steel strand anchor cable is 5～30m (m) in underground length.
T---foundation soil is stirred the shear stress (KN/m on the face
2);
Lateral area (the m of S---truncated cone foundation soil
2)
If it is 5 ° that foundation soil is stirred face angle β, foundation soil unit weight γ is 18KN/m
3, cement-soil compound anchoring body diameter is 1.2m, drilling depth H is 25m.: the radius R on truncated cone foundation soil surface
2=R
1+ Htg β=0.6+25 * tg5 °=2.79m, the volume V=(R of truncated cone foundation soil
1 2+ R
2 2+ R
1R
2) H π/3=(0.6
2+ 2.79
2+ 0.6 * 2.79) * 3.14 * 25/3=257m
3, truncated cone foundation soil weight G
2=γ V=18 * 257=4624KN, the drill bit formula of ignoring reaming earth anchor deadweight G
1With the upward effect of shear stress T of the truncated cone foundation soil side S that is stirred.The uplift resistance F:F ≈ G of this drill bit formula reaming earth anchor
2=4624 (KN).Drawing drill bit formula reaming earth anchor by aforementioned calculation is to have bigger uplift resistance.Draw the anchor-hold M that drill bit formula reaming earth anchor can be born by uplift resistance F through conversion, its reduction formula is M=kF (getting k=0.5～0.8).
2, combining of drill bit and cement-soil compound anchor body: bolt has the drill bit of steel strand anchor cable and the agitator of expansion to form skeleton, is set in the cement-soil compound anchoring body.Because the cement-soil that foundation soil and the cement paste that is pressed into evenly stir into, can reach 10～20Mpa unconfined compression strength after solidifying, agitator to drill bit and expansion produces enough bond stresss, make cement-soil compound and drill bit and agitator become integral body, increase the area that the anchor body contacts with foundation soil widely, improved uplift resistance.
3, the bearing capacity of steel strand anchor cable: by national GB5224 standard, the steel strand that China produces are divided into 6 kinds of specifications, and its rank is 1470～1670N/mm
2, steel strand nominal diameter Φ is 9.0～15.0mm, minimum Fracture Force is 83.89～250.80KN, and has good underrelaxation characteristic, is a kind of quite desirable anchor cable material.When the pulling capacity (anchor-hold) of designing requirement is big, can adopt many steel strand to merge into one anchor cable.
4, the linear expansion coeffcient of steel strand anchor cable and cement-soil compound: the linear expansion coeffcient of steel strand is 1.2 * 10
-5/ C, the average linear expansion coeffcient of cement-soil compound is 1.0 * 10
-5/ C because the linear expansion coeffcient of two kinds of materials is roughly the same, can not produce excessive temperature deformation and stress.Because of the cement-soil compound has alkalescent,, play the effect of not corrosion of protection steel strand so the cement-soil compound is wrapped in steel strand.In addition, have higher unconfined compression strength after the cement-soil compound solidifies, bonding total collateral resistance T that steel strand are resisted steel strand anchor cable topping circumferential surface jointly.
5, the drill bit wing stirs the stirring to the cement-soil compound: by the design of drill bit, the regulation of constructing operation rules and the checking of test of many times, drill bit is stirred the angle that fin is designed to α=3～10 selected for different foundation soils °.The agitator that helps drill bit, in the time of upwards while turning clockwise the mud jacking limit cut, peel off, broken and stir foundation soil, when downward while turning clockwise the even stirring concrete earth in mud jacking limit.With the foundation soil is raw material, is about the cement-soil compound anchor body of 1.2m, high about 2m by certain water/binder ratio and soil paste than stirring into diameter.
Advantage of the present invention is:
The present invention adopts disposable drill bit, and the used material of this drill bit is steel commonly used, because reasonable in design, function possesses, not only boring is fast, and constitutes integral body in cage of reinforcement is set in cement-soil compound body, becomes the ground tackle that can resist big pulling capacity jointly.Have stressed clear and definite, give full play to material behavior, easy construction fast, low pressure mud jacking, material economize, cost is low, take up an area of less, little to ambient influnence, be applicable to different anchoring angles, can form the characteristics of 1000～5000KN uplift resistance, be the new anchoring process of a kind of fixedly engineering structures, main equipment or slope reinforcement etc.
Description of drawings:
Fig. 1 drill bit formula reaming earth anchor drill bit and drill headstock and drilling rod assembling schematic diagram.
Fig. 2 drill bit left side TV structure schematic diagram.
Fig. 3 drill bit is faced the structural profile schematic diagram.
Fig. 4 drill bit right side TV structure schematic diagram.
Fig. 5 drill bit plan structure schematic diagram.
Fig. 6 drill bit is looked up structural representation.
Fig. 7 drill headstock is faced the structural profile schematic diagram.
Fig. 8 drill headstock side-looking structural representation.
Fig. 9 drill headstock is looked up structural representation.
Figure 10 drill headstock plan structure schematic diagram.
Figure 11 agitator is faced structural representation.
Figure 12 agitator plan structure schematic diagram.
Figure 13 agitator side-looking structural representation.
Figure 14 drill bit formula reaming earth anchor constructure scheme schematic diagram.
Figure 15 is the stressed sketch of drill bit formula reaming earth anchor.
The specific embodiment:
Referring to Fig. 1～14.
A kind of ground tackle structure includes the drill bit 1 of cylindricality, and described drill bit 1 front end is fixed with cross formula cutter saddle; Have cavity (for guide pipe 3) in the described drill bit 1, drill bit 1 upper end has the central passage that is communicated with cavity, is fixed with anchor plate 5 in the described central passage, and anchor plate 5 centers have perforation; Be fixed with horizontal bearing pin 8 on the inwall of described drill bit 1 internal cavity, be set with the agitator 11 of yi word pattern on the bearing pin 8, be fixed with anchor block 14 on the agitator 11, described agitator 11 vertically is contained in the cavity on the drill bit 1, and the ring wall both sides with the cavity corresponding position on the described drill bit 1 have the spademan mouth that produces for agitator 11; Described drill bit 1 top fixed cover is equipped with the drill headstock 20 of cylindricality, and described drill headstock 20 centers have interface channel, and the top fixed cover of described drill headstock 20 is equipped with the drilling rod 31 of hollow; The center line of the center line of described central passage, the center line of interface channel and drilling rod 31 is located along the same line; Be provided with the whitewashing mouth 22 that is communicated with the inner chamber of drilling rod 31 in the described drill headstock 20, the outlet of described whitewashing mouth 22 is positioned on the annular outer wall of drill headstock 20; Include some steel strand, wherein steel strand 16 penetrate from drilling rod 31 tops, enter in the cavity of drill bit 1 after passing perforation on interface channel, the anchor plate 5 and central passage successively, and its end is fixed on the anchor block on the agitator 11; All the other steel strand 35 penetrate from drilling rod 31 tops, pass interface channel after its end be fixed on the described anchor plate 5.(this structure is simplified on structure shown in Figure 1 to some extent).
Utilize the ground tackle of described structure to carry out the job practices of reaming earth anchor, design following ground tackle parts: drill bit 1, cross formula cutter saddle 2, guide pipe 3, attachment plug 4, anchor plate 5, steady pin fasten 6, spring latch lock 7, bearing pin 8, lock wing spring catch 9 and agitator block 10; Agitator 11, stirring fin 12, agitator seat 13, anchor block 14, pin shaft hole 15 and spademan steel strand 16; Drill headstock 20, tool joint 21, whitewashing mouth 22, spring latch lock groove 23, adapter sleeve 24; Rig 30, drilling rod 31, transfusion device 32, feed pipe for mortar 33, mud jacking material 34, steel strand 35, cement-soil compound anchoring body 36, foundation soil 37, stir face 38, cement-soil compound anchoring body compression face 39.
Before the operation, be provided with at need on the ground or bank slope of earth anchor, settle rig 30 and heap to build the cofferdam of slagging tap in boring zone.Several steel strand 35 are anchored in the anchor plate 5 of drill bit 1, and do marked steel strand 16 to one in addition and pass the eyelet that this anchor plate 5 is reserved, be anchored in the anchor block 14 of agitator 11.All steel strand 35 and spademan steel strand 16 are penetrated drill headstock 20 and drilling rod 31 endoporus that are installed on the rig 30, from transfusion device 32 endoporus, pass.The adapter sleeve 24 of the attachment plug 4 insertion drill headstocks 20 of drill bit 1, tighten steel strand 35 at transfusion device 32 tops with special-purpose jack and catch hold of drill bit 1, fold remaining steel strand 35 and spademan steel strand 16.According to spudding in after designing requirement adjustment drilling rod 31 angles, slush pump extracts clay mortar from mud pit, flow to drill headstock 20 by feed pipe for mortar 33, transfusion device 32 and drilling rod 31, drill bit 1 limit rotary drilling, the limit is from the whitewashing mouth 22 of drill headstock 20 1 sides, with 0.5～1.0Mpa pressure extrude that the clay mud pulp-water is slagged tap, retaining wall and remove the clay of sticking with paste on drill bit.After boring reached projected depth, drill bit 1 continued rotation but drilling depth not, and slush pump stops to rig 30 transporting clay mud.The mixer slurry that begins to mix cement, slush pump change in the cement stock tank and extract cement paste, flow to drill headstock 20 by feed pipe for mortar 33, transfusion device 32 and drilling rod 31, and the whitewashing mouth 22 on the drill headstock 20 extrudes cement paste with 1.0～3.0Mpa pressure.Jack is operated in rotary drilling-head 1 limit in limit on the transfusion device 32 at drilling rod top, the steel strand 16 that pulling is connected with agitator 11 anchor blocks 14 are all opened agitator 11 at leisure.Then, the mud jacking limit is slowly at the uniform velocity upwards carried and being bored about about 2m while rotating, and repeatedly cuts to and fro downwards, peels off, broken and stir foundation soil, forms the cement-soil compound anchoring body 36 that diameter is about 1.2m, the about 2m of height.Drill bit 1 is parked in the 1/4 height place of carrying brill, holds and press mud jacking decompression again in 5 minutes.After carrying out the length mark of steel strand 35 on the drilling rod 31 top transfusion devices 32, unclamp all steel strand 35 and spademan steel strand 16, upwards carry fast and bore 20cm, allow drill bit 1 and drill headstock 20 break away from, have bolt the drill bit 1 of steel strand 35 and spademan steel strand 16 to rest in the cement-soil compound anchoring body 36.Then, drilling rod 31 and drill headstock 20 are withdrawed from the mud jacking limit while rotating, and make steel strand 35 and the spademan steel strand 16 outside cement-soil compound toppings that form greater than 5cm.Suitably exert oneself on the ground exceptionally straight all steel strand 35 and spademan steel strand 16 are fixed on the centre position of cement-soil compound topping to steel strand 35 and spademan steel strand 16, treat just to have finished after the cement-soil compound solidifies the construction of an earth anchor.According to the spacing of designing requirement, adopt above-mentioned method to finish the earth anchor of other roots.
The effect of drill bit 1 is when not launching agitator, steel strand 35 as the drill bit band and pierces the ground depths; When launching agitator, foundation soil is stirred into cement-soil compound anchoring body 36, and rest on increase uplift resistance in the cement-soil compound anchoring body 36 as ground tackle with the cement paste that is pressed into.When being boring, the effect of cross formula cutter saddle 2 more easily cuts foundation soil.The effect of guide pipe 3 is not bore partially for drill bit 1 boring guiding, guarantees the straight degree of holing, and fixing agitator 11.The effect of attachment plug 4 is that drill bit 1 is connected with drill headstock 20, passes to the moment of torsion of drill bit 1 boring, and fixedly the steel strand anchor plate 5, easy and drill headstock 20 disengagings after boring is finished.The effect of anchor plate 5 is that the bolt anchor is lived steel strand 35 and is connected with drill bit 1.Steady pin 6 the effect of fastening is that fixedly steel strand anchor plate 5 does not allow its rotation.The effect of spring latch lock 7 is when unclamping the steel strand 35 spreading drilling rods 31 of catching hold of drill bit 1, can allow the adapter sleeve 24 temporary fixed drill bits 1 of drill headstock 20.Can bear the deadweight of drill bit 1, but can break away from drill headstock 20 when surpassing drill bit 1 weight.The effect of bearing pin 8 is fixing agitators 11, allows agitator 11 around these bearing pin 8 rotating opening.The effect of lock wing spring catch 9 is after treating that agitator 11 is opened into fully, and ejection lock wing pin 9 pinning agitators 11 do not allow to be regained again.The effect of agitator block 10 is to locate when the bit bore to agitator 11.The effect of agitator 11 is that cement paste and the foundation soil that will be pressed into stir into cement-soil compound anchoring body 36.The effect of stirring fin 12 be cut, peel off, broken, stirring foundation soil, and as the part of ground tackle.The effect of agitator seat 13 is fixing fin 12 and anchor blocks 14 of stirring, and inserts bearing pin 8 backs and rotates around this axle.The effect of anchor block 14 is that anchor is lived spademan steel strand 16 and opened agitator 11.The effect of pin shaft hole 15 is to allow bearing pin 8 penetrate allow agitator 11 rotate in it.The effect of spademan steel strand 16 is to operate jack from transfusion 32 devices at drilling rod 31 tops, spurs these steel strand 16 and opens agitator 11.The effect of drill headstock 20 is to allow drill bit 1 be connected with drilling rod 31.The effect of tool joint 21 is to be connected with drilling rod 31, and mud jacking material 34, inner duct steel strand 35 are carried in the outer shroud duct.When being boring, the effect of whitewashing mouth 22 ejects clay mortar, gunite during stirring.It is temporary fixed that the effect of spring latch lock groove 23 is that the branch sleeve 24 that allows the attachment plug of drill bit 14 insert drill headstocks 20 is done, and can bear the deadweight of drill bit 1 and not fall to bore, but just break away from drill headstock 20 when surpassing drill bit 1 weight.The effect of branch sleeve 24 is to allow the attachment plug of drill bit 14 insert in it connect.The effect of rig 30 is to provide power to drill bit 1, by the angle boring of designing requirement.The effect of drilling rod 31 is the power that passes to drill bit 1, and carries mud jacking material 34 and penetrate steel strand 35.The effect of transfusion device 32 is under the situation that drilling rod 31 rotates, for drill bit 1 is carried mud jacking material 34.The effect of feed pipe for mortar 33 is slush pump to be connected with transfusion device 32 carry mud jacking material 34.When the effect of mud jacking material 34 is boring, is pressed into clay mortar and comes retaining wall and deslagging; Stir or remove when boring, be pressed into cement paste and form the cement-soil compound.The effect of steel strand 35 is anchor cables that engineering structures that need are fixing etc. is connected with the ground tackle of ground depths.The effect of cement-soil compound anchoring body 36 is to solidify drill bit 1 and agitator 11 becomes ground tackle, increases the lifting surface area and the uplift resistance of ground tackle.
Claims (8)
1. ground tackle is characterized in that: include the drill bit of cylindricality, described drill bit bottom is fixed with cutter saddle; Have cavity in the described drill bit, the drill bit upper end has the central passage that is communicated with cavity, is fixed with anchor plate in the described central passage, and the anchor plate center has perforation; Be fixed with horizontal bearing pin on the inwall of described drill bit internal cavity, be set with the agitator of yi word pattern on the bearing pin, be fixed with anchor block on the agitator, described agitator vertically is contained in the cavity on the drill bit, and the ring wall both sides with the cavity corresponding position on the described drill bit have the spademan mouth that produces for agitator; Described drill bit top fixed cover is equipped with the drill headstock of cylindricality, and described drill headstock center has interface channel, and the top fixed cover of described drill headstock is equipped with the drilling rod of hollow; The center line of the center line of described central passage, the center line of interface channel and drilling rod is located along the same line; Be provided with the whitewashing mouth that is communicated with the inner chamber of drilling rod in the described drill headstock, the outlet of described whitewashing mouth is positioned on the annular outer wall of drill headstock; Include some steel strand, wherein steel strand penetrate from the drilling rod top, enter in the cavity of drill bit after passing perforation on interface channel, the anchor plate and central passage successively, and its end is fixed on the anchor block on the agitator; All the other steel strand penetrate from the drilling rod top, pass interface channel after its end be fixed on the described anchor plate.
2. job practices of utilizing the described ground tackle of claim 1 to carry out the reaming earth anchor is characterized in that: carry out according to the following steps successively:
At first, be provided with on the ground of earth anchor or the bank slope at need and settle rig, heap is built the cofferdam of slagging tap in boring zone, and outfit transfusion device, jack, mixer and slush pump, several steel strand are anchored on the anchor plate of drill bit, and after in addition one being done marked steel strand and passes perforation on the anchor plate, be anchored on the anchor block of agitator; Again all steel strand are penetrated the drill headstock that is installed on the rig and the endoporus of drilling rod, from the transfusion device endoporus, pass;
Then, drill bit is inserted drill headstock, tighten steel strand at the transfusion device top with jack and make it catch hold of drill bit, simultaneously, fold remaining steel strand; Spud in after adjusting the drilling rod angle according to designing requirement again, extrusion clay mud pulp-water carries out retaining wall and slags tap while holing; After boring reached projected depth, slush pump stopped to rig transporting clay mud; The mixer slurry that begins to mix cement, slush pump change in the cement stock tank and extract cement paste, and the whitewashing mouth that flows on the drill headstock by feed pipe for mortar, transfusion device and drilling rod extrudes cement paste; Limit rotary drilling mud jacking limit is in front operated jack on the transfusion device at drilling rod top, the steel strand that pulling is connected with anchor block make the agitator that is contained in the yi word pattern in the drill bit cavity produce cavity and reach outward and axis normal;
Then, slowly at the uniform velocity upwards carry and bore 2m, repeatedly cut to and fro downwards again, peel off, broken and stir foundation soil, form the cement-soil compound anchoring body that diameter is about 1.2m, high about 2m; Afterwards, drill bit is parked in the 1/4 height place of carrying brill, holds and press mud jacking decompression again in 5 minutes; After carrying out the length mark of steel strand on the transfusion device of drilling rod top, unclamp all steel strand, upwards carry fast and bore 20cm, allow drill bit and drill headstock break away from, there is bolt the drill bit of steel strand to rest in the cement-soil compound anchoring body;
At last, drilling rod and drill headstock are withdrawed from the mud jacking limit while rotating, and make the outside cement-soil compound topping that forms greater than 5cm of steel strand; The exceptionally straight all steel strand of suitably exerting oneself on the ground are fixed on the centre position of cement-soil compound topping to steel strand, treat just to have finished after the cement-soil compound solidifies the construction of an earth anchor; Use the same method and finish the earth anchor of other roots, get final product.
3. a kind of ground tackle according to claim 1 is characterized in that: described anchor plate is the nahlock shape, and its annular outer wall is provided with screw thread, and its anchoring face is provided with the anchor hole of some tapers, and described steel strand are fixed in the described anchor hole.
4. a kind of ground tackle according to claim 1, it is characterized in that: the top of described drill bit is set to attachment plug, described attachment plug cross section is a hexagon, described drill headstock bottom is set to the sleeve with the attachment plug coupling, described attachment plug center has the threaded passage for the spinning anchor plate, the bolt hole that a mooring anchor backing plate is arranged on the attachment plug side respectively has a spring latch lock on six faces of attachment plug, and described spring latch lock is against on the inwall of sleeve.
5. a kind of ground tackle according to claim 1 is characterized in that: described whitewashing mouth is convergence circle tapered mouth hole, and the profile of nozzle head is the hexagonal (hexagon)nut shape, and there is screw thread in the outside of mouth body; Described drilling rod bottom fitting is the double pipe joint, and its outer annular distance is interconnected with the whitewashing mouth, and endoporus equates with the aperture of the interface channel of drill headstock and is interconnected.
6. a kind of ground tackle according to claim 1, it is characterized in that: described drill bit middle part is a guide pipe, be fixed with lock wing spring catch and agitator link stopper on the inwall of guide pipe, described lock wing spring catch is fixed in the tube wall when the position that agitator all is lockable when the spademan mouth produces; The tube wall of the position that described agitator link stopper is blocked when being fixed in agitator just all has been received in pipe.
7. a kind of ground tackle according to claim 1, it is characterized in that: the centre of the agitator of described yi word pattern is square agitator seat, there is a pin shaft hole centre of agitator seat, and respectively there is the stirring fin of a α angle both sides, and described anchor block is positioned on the agitator seat with the pin shaft hole ipsilateral.
8. job practices according to claim 2, it is characterized in that: described some steel strand penetrate anchor hole on the anchor plate by ground, a hole, be attached to the steel strand end with FShi grip sheet, fill in anchor plate anchor hole and tension, steel strand are anchored on the anchor plate by the root retraction; Again in the threaded passage interior in the attachment plug at the fixing screw-in of anchor plate drill bit top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101273879A CN101806061B (en) | 2010-03-16 | 2010-03-16 | Anchorage unit and construction method using same to ream ground anchor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101273879A CN101806061B (en) | 2010-03-16 | 2010-03-16 | Anchorage unit and construction method using same to ream ground anchor |
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| CN101806061A true CN101806061A (en) | 2010-08-18 |
| CN101806061B CN101806061B (en) | 2011-07-20 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103161153A (en) * | 2013-03-07 | 2013-06-19 | 郭财宝 | Powder injection stirring type anchor pile and construction method |
| CN103410146A (en) * | 2013-08-22 | 2013-11-27 | 郭红标 | Anchor cable anchorage device and construction method thereof |
| CN105735900A (en) * | 2016-04-20 | 2016-07-06 | 广西建工集团第二安装建设有限公司 | Back-enlarging head for anchor hole chambering |
| CN107655740A (en) * | 2017-11-10 | 2018-02-02 | 山东科技大学 | The device and method of different anchorage angle joint plane shear strength test specimens can be tested by making |
| CN107761795A (en) * | 2017-11-02 | 2018-03-06 | 孔军旭 | Pond sludge extracting device for municipal gardens |
| CN108589722A (en) * | 2018-06-05 | 2018-09-28 | 重庆科技学院 | A kind of one-shot forming apparatus and method of extruding type soil bolt |
| CN109732013A (en) * | 2019-01-31 | 2019-05-10 | 淮北矿业股份有限公司 | A kind of underground equipment on renoreting anchor-pole |
| CN111455995A (en) * | 2020-04-24 | 2020-07-28 | 中国十七冶集团有限公司 | Mountain region building resistance to plucking steel pipe stock |
| CN112840083A (en) * | 2018-07-24 | 2021-05-25 | Ojjo股份有限公司 | Thread truss foundations and related systems, methods, and machines |
| CN113073644A (en) * | 2021-03-22 | 2021-07-06 | 西南石油大学 | Automatic drilling type seabed piling device and method |
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| CN103161153A (en) * | 2013-03-07 | 2013-06-19 | 郭财宝 | Powder injection stirring type anchor pile and construction method |
| CN103161153B (en) * | 2013-03-07 | 2016-02-24 | 郭财宝 | Powder spraying stirring formula anchoring pile and construction method |
| CN103410146A (en) * | 2013-08-22 | 2013-11-27 | 郭红标 | Anchor cable anchorage device and construction method thereof |
| CN103410146B (en) * | 2013-08-22 | 2016-06-29 | 郭红标 | A kind of Anchor Cable Anchorage and construction method thereof |
| CN105735900A (en) * | 2016-04-20 | 2016-07-06 | 广西建工集团第二安装建设有限公司 | Back-enlarging head for anchor hole chambering |
| CN107761795A (en) * | 2017-11-02 | 2018-03-06 | 孔军旭 | Pond sludge extracting device for municipal gardens |
| CN107655740A (en) * | 2017-11-10 | 2018-02-02 | 山东科技大学 | The device and method of different anchorage angle joint plane shear strength test specimens can be tested by making |
| CN107655740B (en) * | 2017-11-10 | 2024-01-12 | 山东科技大学 | Device and method for manufacturing test piece capable of testing shear strength of joint surfaces of different anchoring angles |
| CN108589722A (en) * | 2018-06-05 | 2018-09-28 | 重庆科技学院 | A kind of one-shot forming apparatus and method of extruding type soil bolt |
| CN112840083A (en) * | 2018-07-24 | 2021-05-25 | Ojjo股份有限公司 | Thread truss foundations and related systems, methods, and machines |
| CN109732013A (en) * | 2019-01-31 | 2019-05-10 | 淮北矿业股份有限公司 | A kind of underground equipment on renoreting anchor-pole |
| CN111455995A (en) * | 2020-04-24 | 2020-07-28 | 中国十七冶集团有限公司 | Mountain region building resistance to plucking steel pipe stock |
| CN111455995B (en) * | 2020-04-24 | 2021-08-24 | 中国十七冶集团有限公司 | Mountain region building resistance to plucking steel pipe stock |
| CN113073644A (en) * | 2021-03-22 | 2021-07-06 | 西南石油大学 | Automatic drilling type seabed piling device and method |
| CN113073644B (en) * | 2021-03-22 | 2022-03-29 | 西南石油大学 | Automatic drilling type seabed piling device and method |
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