Grooving Device for Underground Structures and Its Construction Method

Abstract

A working method for a trench-cutting device for underground construction, including the following steps: 1) setting up working platforms in working wells at two ends; 2) mounting the trench-cutting device so that the two ends of the trench-cutting device are each in one of the two working wells respectively; 3) enabling the trench-cutting device to cut along a contour line of an underground construction section; and 4) excavating earth along the contour line. Also disclosed is a trench-cutting device for underground construction, consisting of an excavating device (1) and translation devices (2); the excavating device (1) mainly consists of a frame (1-1), a cutting chain (3) and transmission devices (1-2); the frame (1-1) consists of a frame (1-1-1) in a trench and two end frames (1-1-2) outside of the trench; the two end frames (1-1-2) are respectively connected to the translation devices (2) in the two working wells, the transmission devices (1-2) are mounted on the two end frames (1-1-2), and the translation devices (2) are both arranged in the working wells at the two ends. The working platform is set up in four working wells, concrete may be filled in behind as the trench-cutting device excavates the earth, and then after a closed cavity is formed, work is conducted in the cavity. Also disclosed is a trench-cutting device.

1 . Grooving device construction method for the underground structure is mainly characterized in the steps below:
 1) Build a working platform in working shafts on both ends;   2) Install the grooving device, so that two ends of grooving device are built in two working shafts separately by two methods:   (a) Drill holes to thread grooving devices;   (b) Groove directly from the external side (e.g. above or on one lateral side of the mountain);   3) The grooving device cuts grooves along the contour line of the section of the underground structure by two methods:   (1) Carry out grooving and grouting at the same time;   (2) Groove without grouting concrete;   4) Excavate the rock and soil in the contour line.   
     
     
         2 . As  claim 1 , the grooving device for underground structures is characterized in the said grooving device consisted of the excavating device and the translation device; the excavating device  1  mainly consists of frame, chain blade and transmission device; chain blade consists of chain and blade fixed on the chain; frame consists of in-groove frame and both-end frame outside the groove. The in-groove frame consists of the front frame and rear frame. The front frame is equipped with a track for chain blade operation on the front, and the both-end frames are separately connected to the translation device in two working shafts and mounted with a transmission device. The translation device consists of a transmission device and chain wheels and equipped with translation devices in working shafts on both ends. During construction, the translation device in working shafts on both ends drives corresponding both-end frames simultaneously to move according to the specified structure contour track, with the both-end frame driving the chain blades on the front-end track of the in-groove frame along the same track. The driving device drives the chain blade. The blades on the front track of the front frame excavates rock and soil to groove, with chain blade bringing the excavated rock and soil into the working shaft; the in-groove frame is of two types of structures:
 1) Chain blade track is mounted at the back of the front track of the front frame, which is adopted to form a closed loop as the chain returns. The front frame is connected to the rear frame in the groove by two methods: 
 (A) The total width of the blade on the excavated face is equivalent to that of the non-excavated face. The multi-row chain blade is in a staggered arrangement on the non-excavated face. The front frame integrates to the rear frame through the staggered space; 
 (B) The center line of the chain blade is a spatial curve. The blades returning to the chain blade adjacent to the non-excavated face are engaged in a staggered or overlapped way along the longitudinal direction of the chain, i.e. the total width of the blade on the non-excavated face is less than the total width of the blade on the excavated face. The front and rear frames are integrated according to this width difference; 
 2) Two sets of excavating devices share one set of chain blades, i.e. the chain of two chain blades are connected in series to form a closed loop. 
 
     
     
         3 . As  claim 2 , the grooving device for underground structures is characterized in multi-row chain blade and blades of a self-grinding structure. 
     
     
         4 . As  claim 2 , the grooving device for underground structures is characterized in a spatial curve that is the chain center line of the chain blade. 
     
     
         5 . As  claim 2 , the grooving device for underground structures is characterized in that the said chain blade replaces chains and blades in the working shaft, to meet different geological conditions and thickness requirements. 
     
     
         6 . As  claims 2  and  3 , the grooving device for underground structures is characterized in that the said chain blade is a multi-row chain blade, and the multi-row chain blade can excavate simultaneously or separately as necessary. 
     
     
         7 . As  claim 6 , the grooving device for underground structures is characterized in that the said multi-row chain blade is arranged in a cone shape on the excavated face. 
     
     
         8 . As  claims 1  and  2 , the grooving device for underground structures is characterized in that the said construction methods can be divided into method A and method B.
 The said method A includes both grooving and grouting at the same time, and concrete nozzles are equipped at the tail end of the rear frame. 
 The said method B is to groove only without grouting. 
 
     
     
         9 . As  claim 6 , the grooving device for underground structures is characterized in that for the said method A, a reinforcement arrangement device is equipped at the back of the rear frame, so that the concrete after grouting contains reinforcement. 
     
     
         10 . As  claim 1 , the grooving device for underground structures is characterized in that the said working shafts are existing structures.