CN1041416A - Underground apical pore job practices and construction machinery - Google Patents

Abstract

" underground head space job practices and construction machinery " is a new technology, belongs to mechanical field, can be used as avenue and lays various underground utilities, exempts from brokenly the usefulness on road surface.Between two vertical, push up piecemeal with the layering of electronic hydraulic jack merogenesis and to wear hole, soil property ground, draw (ejecting) top push pipe then, make between two wells, form a underground duct.Its technical characterictic is that the top trend is reliable, is not unearthed in the hole, ground, can layering enlarge.This new technology is applicable to that avenue lays the underground gas pipeline, middle-size and small-size running water pipe, and communication cable and power cable etc., its major advantage is to avoid the avenue pavement destruction.

Description

Underground apical pore job practices and construction machinery

Underground head space is a new technologies, belong to mechanical field, can be used as the usefulness that avenue lays various underground utilities, exempts from brokenly the road surface, between two vertical, push up hole, logical soil property ground piecemeal with the layering of electronic hydraulic jack (1-1) merogenesis, eject then, draw push pipe (3) and (4), make and form a underground duct between two wells.

Technical characterictic:

1, the large-scale jack biggest lifting capacity reaches 750 tons, and enough thrust is arranged, and the aperture can enlarge in layering, spiles back expanded hole in case of necessity earlier.

2, the top is provided with 4 splice bars (2-1), like rudder for ship, can keep the straight ahead of top (2), prevents to wander off.

3, top boresight facility, and the body bearing calibration is simple and reliable.

4, push pipe (3) periphery in is close to duct earth, keeps push pipe string center line not crooked.

The scope of application:

Avenue lays the underground gas pipeline, middle-size and small-size running water pipe, communication cable, power cable etc.

Job practices and step:

1, along pipeline path excavation vertical, well depth reaches factors such as not making the ground projection according to pipeline buried depth needs to be decided, about 1 square metre of well, the interval of well and well, tentative 30-50 meter, progressively improve after experiment, it is real that straight tamper is rammed in the shaft bottom, and it is real that well side (bearing the one side of jack pad assembly power) also will be rammed straight tamper.

2, hang in the #1 well (5-1) load is iron-plated with chain block, paste and stand in a side of bearing jack pad assembly power, (load iron plate needs the reinforcement thickening, and enough bearing areas should be arranged), and then hang in a black iron plate, keep flat the shaft bottom.

3, with chain block the whole support of electric oil pressure jack is hung in the #1 well, jack crouches in well, and the jack bottom is close to edge-on force bearing plate, jack top to the #2 well, starts the soil compression of jack with load-carrying surface then.

4, dress top (2): the tail end (2-3) that will come directly towards (2) tightly is enclosed within on the fore-set of jack, it is real to overlap flat cover, jack fore-set outer rim groove will be aimed at the groove of top afterbody, and the center line that makes the center line of jack body and top (2) point-blank; Have on the top to reach ridge line groove (1-4), (2-2) that same height is all arranged on the splice bar edge on 4 splice bars (2-1), the jack body, this two groove will be aimed at.

5, on #1 well (5-1) and #2 well (5-2) ground, outer end, respectively squeeze into one of wooden Chinese toon, wooden Chinese toon must beat above the center line of duct, on two wooden Chinese toons, frame is put a conduit axis wire, (5-3) also tension, and the wire two ends overhead highly are 50 centimeters.

6, from the aboveground side's of #1 wire (5-3), hang following two isometric catenaries (5-4), the most advanced and sophisticated splice bar crestal line (2-2) that points to of the son that dangles, the most advanced and sophisticated jack crestal line (1-4) that points to of another son that dangles, body roughly sets right with crowbar earlier.

It is most advanced and sophisticated to overlook two sons that dangle, and adjusts foot-screw (1-2), makes body consistent with the suitable line direction of steel wire (5-3) along the line direction.

Look squarely the most advanced and sophisticated foot-screw (1-3) of adjusting of the son that dangles, make two dangle sub-tip respectively with crestal line (2-2), clearance distance (1-4) equates, has so just guaranteed that crestal line is parallel with the vertical plane of wire, then body is fixed, even if so far initial adjustment finishes.

7, actuating motor (1-5) after jacking first is bored, is resumed classes to the seat in the plane.

8, jack fore-set withdrawal, disengagement top (2), jack stroke are 30 centimeters.

9, between the fore-set end of top tail end and jack, form 25 centimeters spacing, in this space, connected one 25 centimeters long push pipes (3).

10, start jack for the second time, make top (2) readvance 20 centimeters, directly push up the #2 well later on by that analogy.

11, unload top (2) at the #2 well.

12, the big push pipe (3) in the hole, ground is ejected one by one with little push pipe (4) at the #1 well.

13; larry of device on the ground before the #2 well; the pulley of a wire rope turning usefulness of device in the #2 well; use larry and wire rope that the little push pipe (4) in the ground is drawn then; so far this sector hole road is promptly accused and is got through; in order to prevent that earth from sinking; and then just cement tube (protection tube) or cast iron pipe (the interface bead is in the inboard); introduce in the hole, ground with larry and wire rope; running water pipe and gas flue can direct-burrieds; the well length of #1 well need be dug an elongated slot; so that iron pipe can keep flat into well, but be not that each vertical all will be slotted, because the traction iron pipe can be by several straight line well spacings.

14, reaming: after the 11st of construction sequence finished, in the #1 well with the top of a big grade, start jack push pipe (4), pushed forward in big top, one side enlarges the aperture, one side is released push pipe (3), with larry push pipe (4) is drawn then, push pipe (4) has gap, this is to take off for the ease of the wire rope from tension, carries out second reaming as need, and method roughly the same, top external diameter grade is tentative to be 10,12,14,16 centimeters, and the sand matter of loosening the soil can suitably be amplified.

Construction equipment:

1, electric oil pressure jack (1-1), 750 tons of the biggest lifting capacities see also mechanical engineering manual 12 volume 47-46 pages or leaves, choose horizontal and will manually make into electronic.

2, jack support comprises the installation of motor and adjustment screw etc.

3, top (2) is with splice bar (2-1), and the top external diameter can be divided into several grades, and tentative is 10,12,14,16 centimeters.

4, big push pipe (3), its external diameter equates with the first estate top external diameter.

5, little push pipe (4) has gap, its external diameter is littler 5 centimetres than big push pipe, purpose is in order to reduce the frictional force with earth, but during reaming because of differing too much with the aperture, in order to prevent to come directly towards the bending of string center line, can on push pipe (4), add lasso of cover temporarily, lasso thickness is decided on the aperture, native hole of expansion, lasso length needs only 2 centimeters, stays on the push pipe (4) with system head screw system.

6, sighting device (5).

Claims (3)

1, utilize the thrust of electric oil pressure jack, make top (2) in ground (soil property) layering is pushed ahead piecemeal with gap, form a underground duct, it is characterized in that:

The biggest lifting capacity of A, large-scale jack reaches 750 tons, and its thrust is enough to make top (2) to advance in ground, and the ground bore dia can enlarge in layering, spiles back expanded hole in case of necessity earlier.

B, because there are 4 splice bars (2-1) top on (2), like rudder for ship, can keep top (2) straight ahead, prevent to wander off.

C, duct do not have unearthed.

2, device according to claim 1, jack frame are provided with the location and adjust screw, and it is as the criterion with reference axis wire (5-3), in order to levelling body center line, make consistent with the pipe axis center line, for the top aiming, this kind method of sight is no matter the hillside fields, level land is all applicable.

3, device according to claim 1, the external diameter of push pipe (3) equates that with the external diameter of top (2) push pipe ejection head advances, the push pipe periphery is hole earth closely, can prevent the bending of push pipe string center line, makes the top straight ahead.

Images