CN100503984C - Foundation reinforcing method - Google Patents
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- CN100503984C CN100503984C CNB2006100300389A CN200610030038A CN100503984C CN 100503984 C CN100503984 C CN 100503984C CN B2006100300389 A CNB2006100300389 A CN B2006100300389A CN 200610030038 A CN200610030038 A CN 200610030038A CN 100503984 C CN100503984 C CN 100503984C
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Abstract
The invention relates to a foundation strengthen method, which comprises: 1, designing the drilling curvature from the construction point to the pour point; 2, drilling one guide hole from said construction point, to reach the pour point; 3, building and connecting one pour channel from the construction point to the pour point; 4, via said pour channel, pouring from the construction point into said pour point. Since the inventive method uses horizontal directed drilling technique, and combines special pour driller, hollow connector and solid connector, it has high safety and lower cost.
Description
Technical field
The present invention relates to building engineering field, relate to a kind of foundation reinforcement method, relate in particular to a kind of job practices that underwater is reinforced.
Background technology
Capital construction field in construction work, at present varied to the method for ground stabilization, as slurry injection technique, impervious wall technology, high pressure jet grouting technique, deep mixing method reinforcing technique, vibroflotation method reinforcing technique etc., but various prior art mainly is the building lot that is applicable on the basis, land.
For the reinforcing of underwater, be subjected to the limitation of construction environment, ripe job practices is few, and its reason is, but the selection of reinforcement means must be satisfied many-sided factors such as the application property, economy, safety, ambient influnence of scheme simultaneously.Certainly, adopt the scheme of slurry injection technique many generally, promptly cement paste accurately got to the below of predetermined soil layer, treat that cement paste solidifies after, just can play good supporting role to the soil layer of book office, prevent the further sedimentation of ground.But how to undersurface ground, for example the ground under the submerged tunnel tube coupling being carried out consolidation grouting then is a huge difficult problem on the broad water surface.Existing technical scheme is each defectiveness all:
One of prior art scheme, past river subdrilling hole slip casting in the tunnel tube coupling.This scheme needs closure of a tunnel, causes important social influence and economic loss thus certainly; Boring simultaneously can destroy the overall structure in tunnel, and the safety that jeopardizes the whole piece tunnel probably is difficult to control construction risk.
Two of prior art scheme is set for this platform at the river surface of tunnel upper, by the method for underwater operation, reinforces from the outside to the ground of tube coupling below.This method construction will influence the river surface navigation, and difficulty of construction is big, the engineering cost height.
Therefore, design a kind of low cost, low-risk job practices, solve the reinforcing of underwater ground, just become the technical problem that this area presses for solution.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides a kind of low cost, low-risk, is applicable to the reinforcement means of underwater.
For achieving the above object, foundation reinforcement method of the present invention may further comprise the steps:
Step 1, the boring curve of design from the construction point to slip casting point;
Preferably, in the step 1,, calculate and set described boring curve according to the angle of penetration of concrete formation condition, features of terrain, underground obstacle position and drilling rod, the parameters such as radius of curvature that drilling rod allows from described construction point to described slip casting point.
Preferably, in the step 2, the operation of described brill pilot hole also comprises the monitoring of drilling process and control.
Preferably, described monitoring and control to drilling process is to adopt the wired direction controlling system of earth magnetism to realize.
Preferably, described monitoring and control to drilling process is to adopt the surface beacon system to realize.
Preferably, in the step 3, described operation of setting up the slip casting passage comprises following operating process: earlier described drilling rod is all extracted out, unload described drill bit, the diameter hollow drill less than described pilot hole internal diameter then changes the outfit, install a slip casting drill bit additional in described hollow drill front, along described pilot hole described hollow drill and described slip casting drill bit are arrived described slip casting point down at last.
Preferably, offer the mud jet around the described slip casting drill bit equably, the size of described jet and quantity are selected according to the flow and the calculation of pressure of described slip casting operation, and the effect of described jet is that the mud in the described hollow drill can be injected in the described slip casting point by means of described jet.
Preferably, after described operation of setting up the slip casting passage is finished, the operation of described connection slip casting passage comprises following operating process: earlier in the end a hollow drill head is adorned a hollow short circuit, and described hollow short circuit is reserved with one and is used for the slip casting connector that is communicated with described grouting pump; At described hollow short circuit other end adjunction one solid short circuit, described solid short circuit is connected with the drill power head front end of described construction point then, extraneous drill power head, described solid short circuit, described hollow short circuit, described hollow drill are connected successively; Thereby described grouting pump, described slip casting connector, described hollow drill and described slip casting drill bit are linked together, form the described slip casting passage that connects.
Preferably, in the step 4, the cement paste that is used for described slip casting operation modulates by certain grout coordinate ratio, by described slip casting passage, uses grouting pump that described slip casting point is carried out the slip casting operation from described construction point
Preferably, in the step 4, when carrying out described grouting operation, drive operations such as described hollow drill is rotated, advances, retreats by means of described drill power head, the different section points place that is able to set in described pilot hole carries out described grouting operation.
Preferably, in the step 4, after the described slip casting end of job, described hollow drill and described slip casting drill bit are drawn back from described slip casting point along described pilot hole.
Preferably, in the step 2, before the operation of described brill pilot hole, carry out the test drilling operation; Described test drilling operation comprises following flow process: debugging mud stirring system also checks whether each connecting line has the mud leakage situation, checks, debugs equipment working states such as slush pump, slush pump gage.
Preferably, in the step 2, before the operation of described brill pilot hole, carry out the drill-in fluid configuration operation; Described drill-in fluid configuration operation comprises gathers water sample in advance, carries out the analytical control of salt content pH value, carries out the preparation of drill-in fluid after the inspection water sample is qualified.
Preferably, after described drill-in fluid configuration operation is finished, and in described slip casting operation process, adopt Marsh funnel that the drill-in fluid viscosity number is measured, every two hours survey once.
Preferably, in the step 4, in the described grouting operation process, Synchronization Control grouting amount, described grouting amount draw with calculation of parameter such as reinforcing thickness by the mud diffusion radius of described slip casting point in advance.
Preferably, in the step 4, described slip casting operation uses grouting pump to finish.
Foundation reinforcement method of the present invention, owing to utilized horizontal orientation to creep into the pipe laying technology, and, solved the technical problem of underwater being carried out consolidation grouting, and low-risk, beneficial effect have cheaply been obtained in conjunction with equipment such as the slip casting drill bit of particular design, hollow short circuit, solid short circuits.
Description of drawings
Be described further below with reference to the technique effect of accompanying drawing, to understand purpose of the present invention, feature and effect fully design of the present invention, concrete structure and generation.Wherein:
Fig. 1 is the construction schematic diagram of a preferred embodiment of the present invention.
The specific embodiment
The crucial part of foundation reinforcement method of the present invention is to utilize horizontal orientation to creep into pipe laying technology (HDD) to be implemented in underwater fixed point ground place's slip casting, to realize the purpose of consolidated subsoil.It is a kind of no-excavation construction method that horizontal orientation creeps into the pipe laying technology, has been applied in obstructions such as river crossing, highway, railway, building maturely and has laid in the construction of (comprising power cable, telecommunication cable, heat distribution pipeline, gas pipeline, water supply and sewerage pipeline etc.) of various pipelines.But be applied in the ground stabilization field, particularly, need separate the technical problem in commit point boring and the slip casting process fixed point ground place, underwater grouting and reinforcing.
Below in conjunction with shown in Figure 1, describe the concrete implementation step that foundation reinforcement method of the present invention is applied to a preferred embodiment of river-crossing tunnel ground stabilization in detail.
Step 1, at first, according to standard, degree of porosity, the property of water-bearing, water permeability and groundwater table, the basement rock degree of depth of the formation condition of construction point such as soil layer with contain ovum gravel situation etc., and the foundation settlement situation, calculate and choose one or more slip casting points.Choose six slip casting points in the present embodiment altogether, and set corresponding boring curve, the boring curve that one of them slip casting point 1 reaches corresponding to slip casting point 1 only is shown among Fig. 1 according to each selected slip casting point.According to the general requirements in horizontal directional drill field, the design of boring curve should be guaranteed the noiseless or damage to underground installation, and meets the technical datas such as minimum bending radius of the horizontal directional drilling machine that is adopted.
Particularly, the design of boring curvilinear path mainly is according to each parameter or factors such as the angle of penetration of the position of concrete formation condition, features of terrain, underground obstacle and drilling rod, the radius of curvature that drilling rod allows, the break-in ability of drill bit, the monitoring capacities that leads, and, obtain a best boring curve in conjunction with engine request.
When creeping into pilot hole 2, the accurate location of drill bit and break-in control are particularly important to drilling track.Monitoring to drill bit in the drilling process mainly is the related parameter that has that obtains hole subdrilling head by direction controlling system.
Drilling rod is the critical component of drilling tool, can provide the slide force, rotation torque, the conveying that act on the drill bit to bore liquid etc.With regard to the structure of the two ends of drill internal and external threads position and the body of rod, drilling rod has two kinds of solid forging formula and welded types, and should meet requirement in light weight, that intensity is high, pliability is good.The helicitic texture of two ends of drill directly influences bonding strength, sealing and the detachable performance between drilling rod.At present, drill rod thread mainly contains API standard button-type, 90 degree angle of thread button-type awl buttons, asymmetric pointed tooth sawtooth button-type awl button, asymmetric awl button etc.In the present embodiment, drilling rod 3 adopts the inner thickening type drilling rod of API standard, and drill bit adopts tri-cone insert bits,, 1 of 20 Foot non magnetic drill collar at 4.125 o'clock.
Because present embodiment is to pass through openr river surface to carry out, control to personnel can't the river surface walking control to, therefore can't use wireless direction controlling system or half wired direction controlling system.Be the accuracy of guaranteeing to creep into, the direction controlling system of present embodiment adopts the earth magnetism of the U.S. Sharewell company line traffic control to be arranged to (MGS) system, for horizontal directional drill provides real time information.The MGS system is made up of five major parts: probe, driller's display instrument, interface instrument, computer and a printer.Probe is contained in the no magnetic assembly of a cover, comprises a non magnetic drill collar, a no magnetic steering pipe nipple and a no magnetic deflecting pipe nipple of being with the drill bit of ejection-type drilling tool or MTR.The signal of probe is transmitted to ground via control to line, is transferred to driller's display instrument and computer after handling through the interface instrument, providing the boring control to real time information.The MGS system can verify the track of boring indirectly, independently, and by producing direct information about tool-face, orientation (level angle) and gradient (vertical angle), provides Position Control accurately.Data are handled on ground to software by control, the degree of depth, haul distance to be provided and to depart from the distance of desired trajectory.
Preferred way is under the situation of no external interference, to finish the measurement of control to parameter behind the measurement unwrapping wire before equipment is marched into the arena in the construction operation band.Employing is determined tentatively to control to parameter in the method for burying and a little averaging along the center line multi-measuring point.Measure data more than 10 at diverse location, average when difference is little, when difference is big, remeasure after analyzing reason.Obtain best control after the actual measurement to parameter and write down raw value.
Further, boring dark surpassing under 100 feet the situation, only depend on earth magnetism to have line traffic control to be difficult to obtain the information of creeping into accurately to (MGS) system, can be on the bank one section adopt surface beacon system (Tru-Truckersystem) carry out accurate track and localization, with guarantee the accuracy of creeping into reach the probe vertical depth ± 2%.
Equipment and technological means that present embodiment adopts, pass through under the condition of curves to guarantee boring curve and design in strict keyhole direction, at the bottom of rig is crossing to the river with drilling rod from the river bank, realize creeping into the precalculated position (be slip casting point 1) of pilot hole 2 to 4 times ready for reinforcing grounds of river-crossing tunnel.
Particularly, the operation of foundation and connection slip casting passage 5 comprises following work flow, at first drilling rod is all extracted out, den bohrkopf abbauen and non magnetic drill collar, the more hollow drill 3 of minor diameter changes the outfit, install a slip casting drill bit 31 additional in hollow drill 3 fronts, in the end hollow drill 3 heads are adorned a hollow short circuit 32 then, and hollow short circuit 32 is reserved a slip casting connector 321 and is communicated with the grouting pump in the external world.The other end at hollow short circuit 32 installs a solid short circuit 33 additional, and solid short circuit 33 is connected with drill power head 6 front ends, thereby drill power head 6, solid short circuit 33, hollow short circuit 32, hollow drill 3 are connected successively.According to the different length of boring curve, hollow drill 3 can be many connections, along original guiding duct hollow drill 3 and slip casting drill bit is arrived slip casting point 1 31 times at last.
On slip casting connector 321, connect extraneous grouting pump again, extraneous grouting pump, slip casting connector 321, hollow drill 3 and slip casting drill bit 31 are linked together, form the slip casting passage 5 that connects.
In the aforesaid operations, slip casting drill bit 31 has guiding and the effect of setting upright, in the process of following hollow drill 3 hollow drill 3 is advanced along the track of former pilot hole 2.In addition, around slip casting drill bit 31, offer mud jet 311 equably, the size of jet 311 and quantity depend on the flow and the pressure of slip casting operation, and the effect of jet 311 is that hollow drill 3 interior mud can be injected in the slip casting point 1 by means of jet 311.
The effect of hollow short circuit 32 is by means of the slip casting connector of reserving 321 grouting pump in the external world and hollow drill 3 interior cement paste perfusion channels to be communicated with.Slip casting connector 321 makes connection, conversion between interface more convenient for grout injection provides translation interface.
Because the external part of drill power head 6 is a hollow stem, the purpose that solid short circuit 33 is set is to prevent that mud from pouring in down a chimney the component that enter in the rig destruction rig, plays a protective role to rig.
The slip casting operation is divided into two kinds again in concrete operations, a kind of is that different section points places' designs at same pilot hole 2 are when having an above slip casting point, just drive operations such as hollow drill 3 in the slip casting operation is rotated, advances, retreats by drill power head 6, make slip casting drill bit 31 successively by the dark past shallow different section points places that rest on pilot hole 2, implement slip casting operation successively respectively, the final technical purpose that realizes the foundation grouting reinforcing of a plurality of slip casting point upsides to an above slip casting point.
Another kind of concrete grouting operation is, a pilot hole 2 is corresponding to a slip casting point 1, after to a slip casting point slip casting end of job, hollow drill 3 is extracted out from pilot hole 2, adjust the rig position according to the position of the next slip casting point of setting then, continue to bore next corresponding pilot hole, repeat above-mentioned slip casting process, all finish brill pilot hole and grouting operation until a plurality of slip casting points, the final technical purpose that realizes the foundation grouting reinforcing of a plurality of slip casting point upsides.
Foundation reinforcement method of the present invention, owing to utilized horizontal orientation to creep into technology, and, solved the technical problem of underwater being carried out the consolidation grouting operation, and low-risk, beneficial effect have cheaply been obtained in conjunction with equipment such as the slip casting drill bit of particular design, hollow short circuit, solid short circuits.
Be to obtain better technique effect, foundation reinforcement method of the present invention can also be made further improvement according to the concrete condition of construction point, concrete as:
Before rig enters the job site, according to the actual conditions of job site, the rig place to be laid, reinforced, the rig place needs smooth compacting, and steel pipe row need lay in rig place in place in the place, lays steel plate on steel pipe row, with carrying rig weight.Outstanding good ground digs in the rig place and to establish fixedly rig of ground anchor pit.With under the earth anchor in ground anchor pit, then rig is connected with earth anchor, stable earth anchor can guarantee normally creeping into and construction precision of rig.
In the rig preceding test drilling of formally spudding in, debugging mud stirring system also checks whether each connecting line has the mud leakage situation, checks whether equipment work such as debugging slush pump, slush pump gage are normal.The effect of mixing and stirring system is that water, swell soil, polymer etc. are added mixing bunker by a certain percentage, then fully stirs to form and bores liquid.Pumping system is will bore liquid by the brill liquid pump to be delivered to the hole-bottom slurry-injection drill bit by hollow drill pipe, and mixes formation mud with drilling cuttings in the hole and move at the hole underflow.
Best, before spudding in, rig carries out the drill-in fluid configuration operation.Gather water sample in advance, carry out the analytical control of salt content pH value, require salt content (NaCl) less than 1%, calcium content (Ca++) is less than 120 mg/litre, carry out the preparation of drill-in fluid after the inspection water sample is qualified, the water quality of preparing drill-in fluid in addition can not be the addle of being polluted, and must adopt clean water preparation drill-in fluid.Drill-in fluid is made up of water, swell soil and various additives (comprising: filter cake agent, tackifier, sliding agent, retaining wall agent, sealing agent etc.), drill-in fluid viscosity should be determined according to geological condition and caliber size, drill-in fluid viscosity should be measured with Marsh funnel, every two hours surveys once.
Outstanding good ground before spudding in, at mud pit of rig place excavation, is used to return the recovery and the storage of mud.In the process of creeping into pilot hole and perfusion mud, will inevitably produce discarded mud.Reclaim mud, after regeneration is handled, recycle repeatedly, not only save resource but also realize environmental protection.
In grouting operation, You Jiadi is according to the mud of each slip casting point diffusion radius with reinforce thickness and precompute suitable grouting amount, to obtain best consolidation effect.
In sum, be several preferred embodiment of the present invention described in this manual.All technician in the art all should be in claim protection domain of the present invention under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (16)
1, a kind of foundation reinforcement method may further comprise the steps:
Step 1, the boring curve of design from the construction point to slip casting point;
Step 2 utilizes drilling rod and drill bit to bore a pilot hole from described construction point, makes described pilot hole arrive described slip casting point;
Step 3 is extracted described drilling rod and described drill bit out, utilizes hollow drill to set up in described pilot hole with the slip casting drill bit and be connected one to connect the slip casting passage of described construction point to described slip casting point;
Step 4 by described slip casting passage, is carried out the slip casting operation from described construction point to described slip casting point.
2, foundation reinforcement method as claimed in claim 1, it is characterized in that: in the step 1, according to the angle of penetration of concrete formation condition, features of terrain, underground obstacle position and drilling rod, the parameters such as radius of curvature that drilling rod allows, calculate and set described boring curve from described construction point to described slip casting point.
3, foundation reinforcement method as claimed in claim 1 is characterized in that: in the step 2, the operation of described brill pilot hole also comprises the monitoring of drilling process and control.
4, foundation reinforcement method as claimed in claim 3 is characterized in that: described monitoring and control to drilling process is to adopt the wired direction controlling system of earth magnetism to realize.
5, foundation reinforcement method as claimed in claim 3 is characterized in that: described monitoring and control to drilling process is to adopt the surface beacon system to realize.
6, foundation reinforcement method as claimed in claim 1, it is characterized in that: in the step 3, described operation of setting up the slip casting passage comprises following operating process: earlier described drilling rod is all extracted out, unload described drill bit, the diameter hollow drill less than described pilot hole internal diameter then changes the outfit, install a slip casting drill bit additional in described hollow drill front, along described pilot hole described hollow drill and described slip casting drill bit are arrived described slip casting point down at last.
7, foundation reinforcement method as claimed in claim 6, it is characterized in that: offer the mud jet around the described slip casting drill bit equably, the size of described jet and quantity are selected according to the flow and the calculation of pressure of described slip casting operation, and the effect of described jet is that the mud in the described hollow drill can be injected in the described slip casting point by means of described jet.
8, foundation reinforcement method as claimed in claim 6, it is characterized in that: after described operation of setting up the slip casting passage is finished, the operation of described connection slip casting passage comprises following operating process: earlier in the end a hollow drill head is adorned a hollow short circuit, and described hollow short circuit is reserved with one and is used for the slip casting connector that is communicated with the grouting pump in the external world; At described hollow short circuit other end adjunction one solid short circuit, described solid short circuit is connected with the drill power head front end of described construction point then, described drill power head, described solid short circuit, described hollow short circuit, described hollow drill are connected successively; Thereby described grouting pump, described slip casting connector, described hollow drill and described slip casting drill bit are linked together, form the described slip casting passage that connects.
9, foundation reinforcement method as claimed in claim 1, it is characterized in that: in the step 4, the cement paste that is used for described slip casting operation modulates by certain grout coordinate ratio, by described slip casting passage, uses grouting pump that described slip casting point is carried out the slip casting operation from described construction point.
10, foundation reinforcement method as claimed in claim 8, it is characterized in that: in the step 4, when carrying out described grouting operation, drive operations such as described hollow drill is rotated, advances, retreats by means of described drill power head, the different section points place that is able to set in described pilot hole carries out described grouting operation.
11, foundation reinforcement method as claimed in claim 1 is characterized in that: in the step 4, after the described slip casting end of job, described hollow drill and described slip casting drill bit are drawn back from described slip casting point along described pilot hole.
12, foundation reinforcement method as claimed in claim 1 is characterized in that: in the step 2, before the operation of described brill pilot hole, carry out the test drilling operation; Described test drilling operation comprises following flow process: debugging mud stirring system also checks whether each connecting line has the mud leakage situation, checks, debugs equipment working states such as slush pump, slush pump gage.
13, as claim 1 or 12 described foundation reinforcement methods, it is characterized in that: in the step 2, before the operation of described brill pilot hole, carry out the drill-in fluid configuration operation; Described drill-in fluid configuration operation comprises gathers water sample in advance, carries out the analytical control of salt content pH value, carries out the preparation of drill-in fluid after the inspection water sample is qualified.
14, foundation reinforcement method as claimed in claim 13 is characterized in that: after described drill-in fluid configuration operation is finished, and in described slip casting operation process, adopt Marsh funnel that the drill-in fluid viscosity number is measured, every two hours survey once.
15, foundation reinforcement method as claimed in claim 1 is characterized in that: in the step 4, in the described slip casting operation process, Synchronization Control grouting amount, described grouting amount draw with calculation of parameter such as reinforcing thickness by the mud diffusion radius of described slip casting point in advance.
16, foundation reinforcement method as claimed in claim 1 is characterized in that: in the step 4, described slip casting operation uses grouting pump to finish.
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| CNB2006100300389A CN100503984C (en) | 2006-08-11 | 2006-08-11 | Foundation reinforcing method |
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| CNB2006100300389A CN100503984C (en) | 2006-08-11 | 2006-08-11 | Foundation reinforcing method |
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| CN100503984C true CN100503984C (en) | 2009-06-24 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786496B (en) * | 2010-03-03 | 2012-09-05 | 上海交通大学 | Deep-water directional drilling and steel-cable back-dragging device |
| CN103470237B (en) * | 2013-09-06 | 2016-04-06 | 兴和鹏能源技术(北京)股份有限公司 | Unconventional oppositely to the method for wearing and rotating signal omniselector |
| CN103835729B (en) * | 2013-11-11 | 2016-06-15 | 北京中煤矿山工程有限公司 | Deep distance roadway surrounding rock pre grouting from the surface reinforcement process |
| CN104695464B (en) * | 2013-12-08 | 2018-09-14 | 国家电网公司 | The construction method of fiberglass tree root shape electric force pole tower stake clump |
| CN108150101B (en) * | 2017-12-22 | 2019-07-05 | 上海煤气第二管线工程有限公司 | A kind of pipeline three-dimensional construction method for crossing |
| CN109811760A (en) * | 2019-01-31 | 2019-05-28 | 山东科技大学 | A kind of method that high polymer PFA reinforces South Sea coral sand ground |
| CN111663388B (en) * | 2020-06-24 | 2021-10-08 | 安徽重标建筑工程有限公司 | Net-forming type tamping method for filler for roadbed construction |
| CN114277776A (en) * | 2022-03-03 | 2022-04-05 | 北京恒祥宏业基础加固技术有限公司 | Accurate horizontal lifting and reinforcing process for dustless factory floor |
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| CN2253359Y (en) * | 1996-08-16 | 1997-04-30 | 石家庄铁道学院 | Horizontal and inclined bore high-pressure rotary jetting apparatus |
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| CN2253359Y (en) * | 1996-08-16 | 1997-04-30 | 石家庄铁道学院 | Horizontal and inclined bore high-pressure rotary jetting apparatus |
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Address after: No.162 Weifang Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 200122 Patentee after: Shanghai Energy Construction Group Co.,Ltd. Address before: 200122 No. 162, Weifang Road, Shanghai, Pudong Patentee before: SHANGHAI MUNICIPAL GAS NO.2 PIPELINES ENGINEERING Co.,Ltd. |